技术领域technical field
本发明涉及计算机领域，具体而言，涉及一种评估方法、装置及系统。The present invention relates to the field of computers, in particular to an evaluation method, device and system.
背景技术Background technique
在理想条件下，某一地区的电网负荷应均匀分布在各个变电站的合理供电半径内，以使这一地区的线路和变压器传输的功率与用电负荷所需的功率相平衡。Under ideal conditions, the grid load in a certain area should be evenly distributed within the reasonable power supply radius of each substation, so that the power transmitted by the lines and transformers in this area can be balanced with the power required by the electrical load.
然而，由于受城市拆迁、人口迁移、线路走廊占地困难等因素影响，在规划初期，原本电网负荷分布相对合理的线路，经过几年的发展以后，容易出现分布不均匀的状况，这一结果会直接导致局部线路过载或10kV母线电压异常。However, due to factors such as urban demolition, population migration, and difficulty in occupying land for line corridors, in the initial stage of planning, lines with relatively reasonable load distribution on the power grid are prone to uneven distribution after several years of development. It will directly lead to local line overload or abnormal 10kV bus voltage.
在相关技术中，由于难以评估某一地区电网负荷分布状况的合理程度，导致无法为某一地区的电网变电站选址定容和线路切改提供参考数据。In related technologies, due to the difficulty in assessing the reasonableness of the grid load distribution in a certain area, it is impossible to provide reference data for site selection and capacity adjustment of grid substations and line switching in a certain area.
针对上述的问题，目前尚未提出有效的解决方案。For the above problems, no effective solution has been proposed yet.
发明内容Contents of the invention
本发明实施例提供了一种评估方法、装置及系统，以至少解决由于难以评估某一地区电网负荷分布状况的合理程度，导致无法为某一地区的电网变电站选址定容和线路切改提供参考方案的技术问题。The embodiment of the present invention provides an evaluation method, device and system to at least solve the problem that it is difficult to evaluate the reasonableness of the load distribution of the power grid in a certain area, resulting in the inability to provide power grid substation site selection and capacity adjustment and line switching in a certain area. Refer to technical issues of the scheme.
根据本发明实施例的一个方面，提供了一种评估方法，包括：获取目标区域内第一电网的第一电网接线模型的第一模型参数，上述第一电网接线模型用于描述在当前运行状态下上述第一电网的结构属性；根据上述第一电网模型的第一模型参数确定用于评估上述第一电网的电网负荷分布状况的基础数据；根据上述基础数据对上述第一电网的电网负荷分布状况进行量化评估；输出上述目标区域内上述第一电网的电网负荷分布状况的量化评估结果。According to an aspect of an embodiment of the present invention, an evaluation method is provided, including: acquiring first model parameters of a first grid connection model of a first grid in a target area, the first grid connection model being used to describe the current operating state The structural attributes of the above-mentioned first power grid; the basic data for evaluating the grid load distribution of the first grid model are determined according to the first model parameters of the first grid model; the grid load distribution of the first grid is determined according to the basic data Quantitative assessment of the situation; outputting a quantitative assessment result of the grid load distribution status of the first grid in the target area.
进一步地，在输出上述目标区域内上述第一电网的电网负荷分布状况的量化评估结果之后，上述方法还包括：获取目标区域内第二电网的第二电网接线模型的第二模型参数，上述第二电网接线模型用于描述在当前运行状态下上述第二电网的结构属性；根据上述第二电网模型的第二模型参数确定用于评估上述第二电网的电网负荷分布状况的基础数据；根据上述第二电网的电网负荷分布状况的基础数据和上述第一电网的电网负荷分布状况的基础数据对上述第二电网的电网负荷分布状况和上述第一电网的电网负荷分布状况进行比较，得到比较结果；根据上述比较结果从上述第一电网和上述第二电网中确定出电网负荷分布均匀的电网；将电网负荷分布均匀的电网作为量化评估结果输出。Further, after outputting the quantitative assessment results of the grid load distribution status of the first grid in the target area, the method further includes: acquiring the second model parameters of the second grid connection model of the second grid in the target area, the first The second grid connection model is used to describe the structural attributes of the second grid in the current operating state; determine the basic data for evaluating the grid load distribution of the second grid according to the second model parameters of the second grid model; according to the above The basic data of the grid load distribution status of the second grid and the basic data of the grid load distribution status of the first grid are compared to the grid load distribution status of the second grid and the grid load distribution status of the first grid to obtain a comparison result ; Determine the grid with uniform load distribution from the first grid and the second grid according to the comparison result; output the grid with uniform load distribution as a quantitative evaluation result.
进一步地，上述目标区域包括多个分区，每个分区对应上述第一电网中的一个分区电网，根据上述第一电网模型的第一模型参数确定用于评估上述第一电网的电网负荷分布状况的基础数据包括：根据上述第一电网模型的第一模型参数确定上述多个分区中各个分区对应的分区电网的分区电网负荷分布状况的基础数据，根据上述基础数据对上述第一电网的电网负荷分布状况进行量化评估包括：根据上述各个分区对应的分区电网的分区电网负荷分布状况的基础数据计算上述各个分区的分区电网负荷电气均匀系数；根据上述各个分区的分区电网负荷电气均匀系数计算上述目标区域的第一电网负荷电气均匀系数；根据上述第一电网负荷电气均匀系数对上述第一电网的电网负荷分布状况进行量化评估。Further, the above-mentioned target area includes a plurality of partitions, and each partition corresponds to a partition grid in the above-mentioned first grid model, and the parameters used to evaluate the grid load distribution of the above-mentioned first grid model are determined according to the first model parameters of the above-mentioned first grid model. The basic data includes: according to the first model parameters of the above-mentioned first power grid model, the basic data for determining the load distribution status of the sub-regional power grids corresponding to each of the multiple sub-regions, and the distribution of the power grid load of the first power grid according to the above-mentioned basic data Quantitative evaluation of the status includes: calculating the electrical uniformity coefficient of the regional grid load of each of the above-mentioned zones according to the basic data of the regional grid load distribution status of the corresponding grid of the above-mentioned zones; calculating the above-mentioned target area according to the electrical uniformity coefficient of the grid load of each zone The first electric grid load electrical uniformity coefficient of the above-mentioned first grid load electrical uniformity coefficient is used to quantitatively evaluate the grid load distribution status of the first grid.
进一步地，通过以下公式计算上述各个分区的分区电网负荷电气均匀系数：Si-y＝Si-max-Si-o，Si-max＝Si-o+mSi-d，其中，Si-y为第i分区的可用供电容量，Si-max为第i分区所能提供的最大功率，Si-o为第i分区内所有10kV变压器绕组侧容量的50％，m为实数，Sd为负荷增长步长，Si-total为第i分区的电网设计供电容量，Ai第i分区电网的负荷电气均匀系数。Further, the electrical uniformity coefficient of the regional grid load of each of the above-mentioned partitions is calculated by the following formula: Siy =Si-max -Sio , Si-max =Sio +mSid , Among them, Siy is the available power supply capacity of the i-th partition, Si-max is the maximum power that the i-th partition can provide, Sio is 50% of the winding side capacity of all 10kV transformers in the i-th partition, m is a real number, Sd is the load growth step, Si-total is the design power supply capacity of the power grid in the i-th partition, and Ai is the load electrical uniformity coefficient of the i-th partition grid.
进一步地，通过以下公式计算上述目标区域的第一电网负荷电气均匀系数：其中，T为上述目标区域的第一电网负荷电气均匀系数，ai为第i分区的加权系数。Further, the first grid load electric uniformity coefficient of the above-mentioned target area is calculated by the following formula: Wherein, T is the electrical uniformity coefficient of the first grid load in the above-mentioned target area, and ai is the weighting coefficient of the i-th subregion.
根据本发明实施例的另一方面，还提供了一种评估装置，包括：第一获取单元，用于获取目标区域内第一电网的第一电网接线模型的第一模型参数，上述第一电网接线模型用于描述在当前运行状态下上述第一电网的结构属性；第一确定单元，用于根据上述第一电网模型的第一模型参数确定用于评估上述第一电网的电网负荷分布状况的基础数据；评估单元，用于根据上述基础数据对上述第一电网的电网负荷分布状况进行量化评估；输出单元，用于输出上述目标区域内上述第一电网的电网负荷分布状况的量化评估结果。According to another aspect of the embodiments of the present invention, there is also provided an evaluation device, including: a first acquisition unit, configured to acquire the first model parameters of the first grid connection model of the first grid in the target area, the first grid The wiring model is used to describe the structural attributes of the first grid in the current operating state; the first determination unit is used to determine the load distribution status of the first grid for evaluating the load distribution of the first grid according to the first model parameters of the first grid model basic data; an evaluation unit for quantitatively evaluating the grid load distribution of the first grid based on the basic data; an output unit for outputting a quantitative assessment result of the grid load distribution of the first grid in the target area.
进一步地，上述装置还包括：第二获取单元，用于在输出上述目标区域内上述第一电网的电网负荷分布状况的量化评估结果之后，获取目标区域内第二电网的第二电网接线模型的第二模型参数，上述第二电网接线模型用于描述在当前运行状态下上述第二电网的结构属性；第二确定单元，用于根据上述第二电网模型的第二模型参数确定用于评估上述第二电网的电网负荷分布状况的基础数据；比较单元，用于根据上述第二电网的电网负荷分布状况的基础数据和上述第一电网的电网负荷分布状况的基础数据对上述第二电网的电网负荷分布状况和上述第一电网的电网负荷分布状况进行比较，得到比较结果；第三确定单元，用于根据上述比较结果从上述第一电网和上述第二电网中确定出电网负荷分布均匀的电网；上述输出单元还用于将电网负荷分布均匀的电网作为量化评估结果输出。Further, the above device further includes: a second acquisition unit, configured to acquire the second grid connection model of the second grid in the target area after outputting the quantitative evaluation result of the grid load distribution status of the first grid in the target area The second model parameter, the above-mentioned second power grid connection model is used to describe the structural properties of the above-mentioned second power grid in the current operating state; the second determination unit is used to determine according to the second model parameters of the above-mentioned second power grid model for evaluating the above-mentioned The basic data of the grid load distribution status of the second grid; the comparison unit is used to compare the grid of the second grid based on the basic data of the grid load distribution status of the second grid and the basic data of the grid load distribution status of the first grid The load distribution status is compared with the grid load distribution status of the first grid to obtain a comparison result; the third determination unit is configured to determine a grid with uniform grid load distribution from the first grid and the second grid based on the comparison result ; The above output unit is also used to output the power grid with uniform load distribution as the quantitative evaluation result.
进一步地，上述目标区域包括多个分区，每个分区对应上述第一电网中的一个分区电网，上述第一确定单元还用于根据上述第一电网模型的第一模型参数确定上述多个分区中各个分区对应的分区电网的分区电网负荷分布状况的基础数据，上述评估单元包括：第一计算模块，用于根据上述各个分区对应的分区电网的分区电网负荷分布状况的基础数据计算上述各个分区的分区电网负荷电气均匀系数；第二计算模块，用于根据上述各个分区的分区电网负荷电气均匀系数计算上述目标区域的第一电网负荷电气均匀系数；评估模块，用于根据上述第一电网负荷电气均匀系数对上述第一电网的电网负荷分布状况进行量化评估。Further, the above-mentioned target area includes a plurality of partitions, and each partition corresponds to a sub-region grid in the above-mentioned first grid model, and the above-mentioned first determining unit is further configured to determine, according to the first model parameters of the above-mentioned first grid model, The basic data of the distribution status of the sub-regional grid load of the sub-regional power grid corresponding to each sub-region, the above-mentioned evaluation unit includes: a first calculation module, which is used to calculate the load distribution status of the sub-regional power grid corresponding to each sub-region. The electrical uniformity coefficient of the regional grid load; the second calculation module is used to calculate the first grid load electrical uniformity coefficient of the above-mentioned target area according to the electrical uniformity coefficient of the regional grid load of each of the above-mentioned partitions; The uniformity coefficient quantifies and evaluates the grid load distribution status of the first grid.
进一步地，上述第一计算模块还用于通过以下公式计算上述各个分区的分区电网负荷电气均匀系数：Si-y＝Si-max-Si-o，Si-max＝Si-o+mSi-d，其中，Si-y为第i分区的可用供电容量，Si-max为第i分区所能提供的最大功率，Si-o为第i分区内所有10kV变压器绕组侧容量的50％，m为实数，Sd为负荷增长步长，Si-total为第i分区的电网设计供电容量，Ai第i分区电网的负荷电气均匀系数。Further, the above-mentioned first calculation module is also used to calculate the electrical uniformity coefficient of the sub-area grid load of each sub-area by the following formula: Siy =Si-max -Sio , Si-max =Sio +mSid , Among them, Siy is the available power supply capacity of the i-th partition, Si-max is the maximum power that the i-th partition can provide, Sio is 50% of the winding side capacity of all 10kV transformers in the i-th partition, m is a real number, Sd is the load growth step, Si-total is the design power supply capacity of the power grid in the i-th partition, and Ai is the load electrical uniformity coefficient of the i-th partition grid.
进一步地，上述第二计算模块还用于通过以下公式计算上述目标区域的第一电网负荷电气均匀系数：其中，T为上述目标区域的第一电网负荷电气均匀系数，ai为第i分区的加权系数。Further, the above-mentioned second calculation module is also used to calculate the first electric grid load electrical uniformity coefficient of the above-mentioned target area by the following formula: Wherein, T is the electrical uniformity coefficient of the first grid load in the above-mentioned target area, and ai is the weighting coefficient of the i-th subregion.
根据本发明实施例的再一方面，还提供了一种评估系统，包括：上述的任一项的评估装置According to still another aspect of the embodiments of the present invention, an evaluation system is also provided, including: any one of the above evaluation devices
在本发明实施例中，采用软硬件相结合的方式，通过获取目标区域内第一电网的第一电网接线模型的第一模型参数，第一电网接线模型用于描述在当前运行状态下第一电网的结构属性；根据第一电网模型的第一模型参数确定用于评估第一电网的电网负荷分布状况的基础数据；根据基础数据对第一电网的电网负荷分布状况进行量化评估；输出目标区域内第一电网的电网负荷分布状况的量化评估结果，达到了简单评估某一地区电网负荷分布状况的合理程度的目的，从而实现了能够某一地区的电网变电站选址定容和线路切改提供参考方案的技术效果，进而解决了由于难以评估某一地区电网负荷分布状况的合理程度，导致无法为某一地区的电网变电站选址定容和线路切改提供参考方案的技术问题。In the embodiment of the present invention, a combination of software and hardware is used to obtain the first model parameters of the first grid connection model of the first grid in the target area. The first grid connection model is used to describe the first grid connection model in the current operating state. Structural attributes of the power grid; determining basic data for evaluating the grid load distribution of the first grid according to the first model parameters of the first grid model; quantitatively evaluating the grid load distribution of the first grid according to the basic data; outputting the target area The quantitative evaluation results of the grid load distribution status of the first power grid achieve the purpose of simply evaluating the reasonableness of the grid load distribution status in a certain area, thereby realizing the ability to select the location and capacity of the grid substation in a certain area and provide power for line switching and modification. The technical effect of the reference scheme further solves the technical problem that it is difficult to evaluate the reasonableness of the grid load distribution in a certain area, which leads to the inability to provide a reference scheme for the site selection and capacity adjustment of power grid substations and line switching in a certain area.
附图说明Description of drawings
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:
图1是根据本发明实施例的一种可选的评估系统的硬件结构的示意图；FIG. 1 is a schematic diagram of a hardware structure of an optional evaluation system according to an embodiment of the present invention;
图2是根据本发明实施例的一种可选的评估系统的软件架构的示意图；Fig. 2 is a schematic diagram of a software architecture of an optional evaluation system according to an embodiment of the present invention;
图3是根据本发明实施例的一种典型的地区电网接线模型的示意图；Fig. 3 is a schematic diagram of a typical regional grid connection model according to an embodiment of the present invention;
图4是根据本发明实施例的计算Si-max的原理图；4 is a schematic diagram of calculating Si-max according to an embodiment of the present invention;
图5是根据本发明实施例的一种可选的评估方法的流程图；以及Fig. 5 is a flow chart of an optional evaluation method according to an embodiment of the present invention; and
图6是根据本发明实施例的一种可选的评估装置的示意图。Fig. 6 is a schematic diagram of an optional evaluation device according to an embodiment of the present invention.
具体实施方式Detailed ways
为了使本技术领域的人员更好地理解本发明方案，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分的实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本发明保护的范围。In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本发明的实施例能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.
实施例1Example 1
根据本发明实施例，提供了一种评估系统的装置实施例。According to an embodiment of the present invention, a device embodiment of an evaluation system is provided.
该评估系统包括评估装置。该评估装置包括：第一获取单元，用于获取目标区域内第一电网的第一电网接线模型的第一模型参数，第一电网接线模型用于描述在当前运行状态下第一电网的结构属性；第一确定单元，用于根据第一电网模型的第一模型参数确定用于评估第一电网的电网负荷分布状况的基础数据；评估单元，用于根据基础数据对第一电网的电网负荷分布状况进行量化评估；输出单元，用于输出目标区域内第一电网的电网负荷分布状况的量化评估结果。The evaluation system includes an evaluation device. The evaluation device includes: a first acquisition unit, configured to acquire first model parameters of a first grid connection model of a first grid in the target area, the first grid connection model being used to describe the structural properties of the first grid in the current operating state The first determining unit is used to determine the basic data for evaluating the grid load distribution status of the first grid according to the first model parameters of the first grid model; the evaluation unit is used to determine the grid load distribution of the first grid according to the basic data Quantitative evaluation of the status; an output unit configured to output a quantitative evaluation result of the grid load distribution status of the first grid in the target area.
如图1所示，评估系统的硬件结构包括：位于生产控制区的能量管理系统EMS102，位于安全区的单向物理隔离设备104、EMS Web服务器106、防火墙108，位于办公区的接口服务器110、关系数据库服务器112、实时数据库服务器114和应用服务器116。其中，能量管理系统EMS102负责采集生产控制区内的电网的相关数据；单向物理隔离设备104负责保证网络数据安全，控制数据流只能从生产控制区流入安全区，而无法从安全区反向流入生产控制区；EMS Web服务器106用于采集能量管理系统EMS102的数据；使用时，接口服务器110负责从EMS Web服务器106上接收CIM/XML文件(即电网接线模型的模型参数)、SCADA实时数据等参数，并将接收到的数据进行适当处理后分别存储在关系数据库服务器112和实时数据库服务器114中；具体地，关系数据库服务器112用于存储电网接线模型的模型参数，包括：电网模型、设备参数、设备状态等参数；实时数据库服务器114用于存储从EMS采集的实时数据；应用服务器116用于负责完成在线拓扑分析、潮流分析、各个分区的分区电网负荷电气均匀系数和整个目标区域的电网负荷电气均匀系数的计算等服务，并完成计算结果的Web发布。As shown in Figure 1, the hardware structure of the evaluation system includes: an energy management system EMS102 located in the production control area, a one-way physical isolation device 104 located in the safe area, an EMS Web server 106, a firewall 108, an interface server 110 located in the office area, Relational database server 112 , real-time database server 114 and application server 116 . Among them, the energy management system EMS102 is responsible for collecting relevant data of the power grid in the production control area; the one-way physical isolation device 104 is responsible for ensuring the security of network data, and the control data flow can only flow from the production control area to the safe area, and cannot reverse from the safe area Flow into the production control area; EMS Web server 106 is used to collect the data of energy management system EMS102; During use, interface server 110 is responsible for receiving CIM/XML file (being the model parameter of grid wiring model), SCADA real-time data from EMS Web server 106 and other parameters, and store the received data in the relational database server 112 and the real-time database server 114 after appropriate processing; Parameters, equipment status and other parameters; the real-time database server 114 is used to store the real-time data collected from EMS; the application server 116 is used to be responsible for completing online topology analysis, power flow analysis, the electrical uniformity coefficient of the regional grid load of each partition and the grid of the entire target area Calculation of load electrical uniformity coefficient and other services, and complete the web publishing of calculation results.
需要说明的是，在本发明实施例中，为了验证关系数据库服务器112中的电网接线模型的模型参数是否正确，在评估系统的硬件结构中设置了实时数据库服务器114。当实时数据库服务器114中存储的实时数据与当前的电网接线模型的模型参数相匹配时，确定关系数据库服务器112中的电网接线模型的模型参数正确；否则，确定关系数据库服务器112中的电网接线模型的模型参数错误。It should be noted that, in the embodiment of the present invention, in order to verify whether the model parameters of the grid connection model in the relational database server 112 are correct, a real-time database server 114 is set in the hardware structure of the evaluation system. When the real-time data stored in the real-time database server 114 matches the model parameters of the current grid connection model, it is determined that the model parameters of the grid connection model in the relational database server 112 are correct; otherwise, determine that the grid connection model in the relational database server 112 wrong model parameters.
与图1所示的硬件结构相对应，如图2所示，上述评估系统的软件架构包括：数据层、基础层、应用层和展示层4个主要部分。各层次具体功能如图2所示，数据层用于从CIM/XML文件中获取电网接线模型的模型参数，并从SCADA实时数据获取实时数据，进而将获取的数据汇集到数据集成总线上，也即，数据层主要负责对不同来源的数据按照标准接口进行数据采集、标准转换，其中从EMS中可获得电网运行实时数据；基础层用于根据电网接线模型的模型参数提供拓扑分析服务，并根据实时数据提供计算服务，也即，基础层包括拓扑分析服务和计算服务2个部分，拓扑分析服务主要用来对当前运行状态下的电网进行网络结构描述，计算服务为应用层提供必要的基础分析数据，主要包括支路传输功率以及节点电压。其首先采用P-Q分解法进行初始迭代，然后再转入牛顿–拉夫逊法；应用层是系统的核心，用于根据拓扑分析结果和计算结果对目标区域进行电网负荷分布状况的量化评估，其核心算法将在方法实施例部分进行详细阐述，在此不再赘述；展示层用于输出评估结果，也即，展示层负责将应用层的计算结果以图形和文本的形式展现给用户，例如，采用Flex技术实现实时数据在Web上的发布和图形化显示。Corresponding to the hardware structure shown in Figure 1, as shown in Figure 2, the software architecture of the above evaluation system includes four main parts: data layer, basic layer, application layer and presentation layer. The specific functions of each level are shown in Figure 2. The data layer is used to obtain the model parameters of the grid connection model from the CIM/XML file, and obtain real-time data from the SCADA real-time data, and then collect the obtained data on the data integration bus. That is to say, the data layer is mainly responsible for data collection and standard conversion of data from different sources according to standard interfaces, in which real-time data of power grid operation can be obtained from EMS; the basic layer is used to provide topology analysis services according to the model parameters of the power grid wiring model, and Real-time data provides computing services, that is, the basic layer includes two parts: topology analysis service and computing service. The topology analysis service is mainly used to describe the network structure of the power grid under the current operating state, and the computing service provides the necessary basic analysis for the application layer. The data mainly includes branch transmission power and node voltage. It first uses the P-Q decomposition method for initial iterations, and then transfers to the Newton-Raphson method; the application layer is the core of the system, and is used to quantitatively evaluate the power grid load distribution in the target area according to the topology analysis results and calculation results. The algorithm will be described in detail in the method embodiment section, and will not be repeated here; the presentation layer is used to output evaluation results, that is, the presentation layer is responsible for presenting the calculation results of the application layer to the user in the form of graphics and text, for example, using Flex technology realizes real-time data publishing and graphical display on the Web.
在本发明实施例中，通过搭建一套包含硬件与软件在内的在线应用系统，实现电网负荷分布情况的量化评估。具体地，该系统通过EMS获得地区电网接线模式以及以地区电网某一分区内所有变压器10kV绕组侧容量的50％数值，以此为潮流计算的初始状态，通过潮流计算程序和本发明所采用的评估方法计算各个分区的可用供电容量，然后采用本发明所提出的评估方法求得各个分区的分区电网负荷电气均匀系数；最后将所有分区的分区电网负荷电气均匀系数进行加权，求得目标区域的电网负荷电气均匀系数，最后通过Web输出计算结果，并以此判断该目标区域的电网负荷分布合理程度。需要说明的是，算法部分将在本发明的方法实施例部分进行详细阐述，在此不再赘述。In the embodiment of the present invention, by building a set of online application system including hardware and software, the quantitative evaluation of the grid load distribution is realized. Specifically, the system obtains the connection mode of the regional power grid through EMS and takes the 50% value of the 10kV winding side capacity of all transformers in a certain subregion of the regional power grid as the initial state of power flow calculation. The evaluation method calculates the available power supply capacity of each subregion, and then adopts the evaluation method proposed by the present invention to obtain the electrical uniformity coefficient of the subregional grid load of each subregion; The grid load electrical uniformity coefficient, and finally output the calculation results through the Web, and use this to judge the reasonableness of the grid load distribution in the target area. It should be noted that the algorithm part will be described in detail in the method embodiment part of the present invention, and will not be repeated here.
另外，本发明实施例提出的对某个地区的电网负荷分布状况的量化评估方案，简单明了，易于实现。并且该方案所需的基础数据易于获得。In addition, the quantitative evaluation scheme for the distribution status of the grid load in a certain area proposed by the embodiment of the present invention is simple and clear, and easy to implement. And the basic data required by the program are easy to obtain.
利用本发明实施例中提供的评估方案，不仅可以评估某一个地区的电网负荷分区状况是否合理，确定该地区的电网的薄弱环节，而且可以比较同一地区的电网的不同改造方案中的电网负荷分布状况，确定最优的电网改造方案，为电网改造方案的选取提供依据。Utilizing the evaluation scheme provided in the embodiment of the present invention, not only can it be evaluated whether the grid load zoning status in a certain area is reasonable, and the weak link of the grid in this area can be determined, but also the grid load distribution in different transformation schemes of the grid in the same area can be compared The situation, determine the optimal power grid transformation plan, and provide a basis for the selection of the power grid transformation plan.
具体地，当用于比较同一地区的电网的不同改造方案中的电网负荷分布状况时，上述装置还可以包括：第二获取单元，用于在输出目标区域内第一电网的电网负荷分布状况的量化评估结果之后，获取目标区域内第二电网的第二电网接线模型的第二模型参数，第二电网接线模型用于描述在当前运行状态下第二电网的结构属性；第二确定单元，用于根据第二电网模型的第二模型参数确定用于评估第二电网的电网负荷分布状况的基础数据；比较单元，用于根据第二电网的电网负荷分布状况的基础数据和第一电网的电网负荷分布状况的基础数据对第二电网的电网负荷分布状况和第一电网的电网负荷分布状况进行比较，得到比较结果；第三确定单元，用于根据比较结果从第一电网和第二电网中确定出电网负荷分布均匀的电网；输出单元还用于将电网负荷分布均匀的电网作为量化评估结果输出。Specifically, when used to compare the grid load distribution status in different transformation schemes of the grid in the same area, the above-mentioned device may further include: a second acquisition unit, used to obtain the grid load distribution status of the first grid in the output target area After quantifying the evaluation results, the second model parameters of the second grid connection model of the second grid in the target area are obtained, and the second grid connection model is used to describe the structural attributes of the second grid in the current operating state; the second determination unit uses Based on determining the basic data for evaluating the grid load distribution status of the second grid according to the second model parameters of the second grid model; the comparison unit is used for determining the basic data of the grid load distribution status of the second grid and the grid The basic data of the load distribution status compares the grid load distribution status of the second grid with the grid load distribution status of the first grid to obtain a comparison result; the third determination unit is used to select from the first grid and the second grid according to the comparison result A grid with uniform grid load distribution is determined; the output unit is also used to output the grid with uniform grid load distribution as a quantitative evaluation result.
可选地，上述目标区域可以包括多个分区，每个分区对应第一电网中的一个分区电网，第一确定单元还用于根据第一电网模型的第一模型参数确定多个分区中各个分区对应的分区电网的分区电网负荷分布状况的基础数据。相应的，评估单元包括：第一计算模块，用于根据各个分区对应的分区电网的分区电网负荷分布状况的基础数据计算各个分区的分区电网负荷电气均匀系数；第二计算模块，用于根据各个分区的分区电网负荷电气均匀系数计算目标区域的第一电网负荷电气均匀系数；评估模块，用于根据第一电网负荷电气均匀系数对第一电网的电网负荷分布状况进行量化评估。Optionally, the above-mentioned target area may include a plurality of subregions, each subregion corresponds to a subregional power grid in the first power grid, and the first determining unit is further configured to determine each of the plurality of subregions according to the first model parameters of the first power grid model The basic data of the load distribution status of the corresponding sub-regional power grid. Correspondingly, the evaluation unit includes: a first calculation module, which is used to calculate the electrical uniformity coefficient of the sub-region grid load of each sub-region according to the basic data of the sub-region grid load distribution status corresponding to each sub-region; Calculate the first grid load electrical uniformity coefficient of the target area according to the subregional grid load electrical uniformity coefficient; the evaluation module is used to quantitatively evaluate the grid load distribution status of the first grid according to the first grid load electrical uniformity coefficient.
通过本发明实施例，不仅可以量化评估同一地区中各个分区的局部电网负荷分布状况，而且还可以量化评估该地区中所有分区的全局电网负荷分布状况，从而达到有效量化评估某一地区的全局电网负荷分布状况的合理程度的技术效果，结合地区电网典型接线情况，以清晰明了、易于操作为原则，提出地区电网负荷分布情况量化评估方案。Through the embodiment of the present invention, not only the local power grid load distribution status of each subregion in the same region can be quantitatively evaluated, but also the global power grid load distribution status of all subregions in the region can be quantitatively evaluated, so as to achieve an effective quantitative evaluation of the global power grid in a certain region The technical effect of the reasonable degree of load distribution, combined with the typical wiring situation of the regional power grid, based on the principle of clarity and easy operation, a quantitative evaluation plan for the load distribution of the regional power grid is proposed.
可选地，第一计算模块还用于通过以下公式计算各个分区的分区电网负荷电气均匀系数：Si-y＝Si-max-Si-o(1)，Si-max＝Si-o+mSi-d(2)，其中，Si-y为第i分区的可用供电容量，Si-max为第i分区所能提供的最大功率，Si-o为第i分区内所有10kV变压器绕组侧容量的50％，m为实数，Sd为负荷增长步长，Si-total为第i分区的电网设计供电容量，Ai第i分区电网的负荷电气均匀系数。Optionally, the first calculation module is also used to calculate the electrical uniformity coefficient of the regional grid load of each partition by the following formula: Siy =Si-max- Sio (1), Si-max =Sio +mSid ( 2), Among them, Siy is the available power supply capacity of the i-th partition, Si-max is the maximum power that the i-th partition can provide, Sio is 50% of the winding side capacity of all 10kV transformers in the i-th partition, m is a real number, Sd is the load growth step, Si-total is the design power supply capacity of the power grid in the i-th partition, and Ai is the load electrical uniformity coefficient of the i-th partition grid.
通过本发明实施例采用公式(1)、(2)、(3)计算各分区电网的负荷电气均匀系数的方法简单，算法收敛速度快。According to the embodiment of the present invention, the method of calculating the load electrical uniformity coefficient of each sub-regional power grid by using the formulas (1), (2) and (3) is simple, and the convergence speed of the algorithm is fast.
可选地，第二计算模块还用于通过以下公式计算目标区域的第一电网负荷电气均匀系数：其中，T为目标区域的第一电网负荷电气均匀系数，ai为第i分区的加权系数。Optionally, the second calculation module is also used to calculate the electrical uniformity coefficient of the first grid load in the target area by the following formula: Among them, T is the electrical uniformity coefficient of the first grid load in the target area, and ai is the weighting coefficient of the i-th partition.
以下通过具体实施例详细阐述本发明：Elaborate the present invention in detail below by specific embodiment:
如图3所示的地区A内电网的电网接线模型，由图3可见，此地区的电网为包括220kV、110kV和10kV的多电压等级的典型地区输电网络，可包括三个输电分区(不包括220kV变电站)，其中没有参与运行的T接线不属于任何分区，详细分区见表1。220kV变电站之间由220kV联络线相连，与该地区的其他220kV变电站形成环网运行；110kV变电站侧虽有联络线相连，但为了避免电磁环网的干扰，正常运行时，该地区的110kV变电站各自独立运行。实施时，可以利用EMS获取该地区的电网接线模式，以及该地区电网中各个分区电网内所有10kV变压器绕组侧容量的50％。The grid connection model of the grid in region A is shown in Figure 3. It can be seen from Figure 3 that the grid in this area is a typical regional transmission network with multiple voltage levels of 220kV, 110kV and 10kV, which can include three transmission zones (excluding 220kV substation), and the T connection that is not involved in the operation does not belong to any division. See Table 1 for the detailed division. However, in order to avoid the interference of the electromagnetic ring network, the 110kV substations in this area operate independently during normal operation. During implementation, EMS can be used to obtain the grid connection mode of the region, as well as 50% of the winding side capacity of all 10kV transformers in each sub-regional grid in the region's grid.
表1Table 1
(1)计算各个分区的可用供电容量的数学模型(1) Mathematical model for calculating the available power supply capacity of each partition
其中，各个分区的可用供电容量是指各个分区电网在指定运行方式下，满足所有母线节点电压约束以及所有支路功率约束的条件时，此分区电网所能提供的最大功率与当前所供负荷之差，其数学表达式为：Among them, the available power supply capacity of each partition refers to the difference between the maximum power that this partition grid can provide and the current supply load when each partition grid satisfies the conditions of all bus node voltage constraints and all branch power constraints under the specified operation mode. difference, its mathematical expression is:
Sy＝Smax-So (5)Sy =Smax -So (5)
Smax＝So+mSd (6)Smax =So +mSd (6)
式中，Sy为在当前网络结构与负荷水平下，分区电网所能提供的最大功率与当前所供负荷之差，即分区电网可用供电容量；Smax为分区电网所能提供的最大功率；本发明实施例取So为分区内所有10kV变压器绕组侧容量的50％；m为一实数，在Sd＝So的前提下代表负荷增长倍数；Sd为负荷增长步长，本发明取Sd＝So。In the formula, Sy is the difference between the maximum power provided by the sub-regional grid and the current load under the current network structure and load level, that is, the available power supply capacity of the sub-regional power grid; Smax is the maximum power that the sub-regional power grid can provide; In the embodiment of the present invention, So is 50% of all 10kV transformer winding side capacities in the partition; m is a real number, which represents the load growth multiple under the premise of Sd = So ; Sd is the load growth step size, and the present invention takes Sd = So .
约束条件包括潮流约束、节点电压约束以及导线和变压器支路的容量约束，即Constraints include power flow constraints, node voltage constraints, and capacity constraints of conductors and transformer branches, namely
YU＝I (7)YU＝I (7)
Vil≤Vi≤Viu (8)Vil ≤ Vi ≤ Viu (8)
ii≤iimax (9)ii≤i i max (9)
Si≤Simax (10)Si ≤ Simax (10)
式中，Y为节点导纳矩阵，U为节点电压矢量，I为所有节点的复电流注入矢量；Vi、Viu和Vil分别为节点i的电压及其上下限；ii和iimax为各支路流过的电流和其允许通过的最大电流；Si和Simax为各变压器支路流出的功率值和最大允许容量。In the formula, Y is the node admittance matrix, U is the node voltage vector, I is the complex current injection vector of all nodes; Vi , Viu and Vil are the voltage of node i and its upper and lower limits respectively; ii and iimax is the current flowing through each branch and its maximum allowable current; Si and Simax are the power value and maximum allowable capacity flowing out of each transformer branch.
在本发明实施例中，利用电网负荷分布与潮流计算约束条件两者间的内在联系，抽象出便于操作的量化评估指标，做到了物理概念与数学模型的有效有统一，具有一定的实际应用价值。In the embodiment of the present invention, the inherent relationship between the grid load distribution and the power flow calculation constraints is used to abstract quantitative evaluation indicators that are easy to operate, and the physical concept and mathematical model are effectively unified, which has certain practical application value .
(2)求取Smax的方法(2) The method of obtaining Smax
从当前的负荷水平运行点出发，选取一个合适的步长m，按照一定的负荷增长模式，不断增大负荷，每增加一次负荷就求取一次潮流解，直到有越限约束条件被激发为止。在负荷增长过程中，步长m按一定策略不断调整，直到满足一定的精度要求。即将发生越限的那个临界点所对应的负荷作为该区域电网在当前运行方式下所能提供的最大功率。Starting from the current load level operating point, select a suitable step size m, and continuously increase the load according to a certain load growth mode, and obtain a power flow solution every time the load is increased, until an exceeding constraint condition is triggered. In the process of load growth, the step size m is adjusted continuously according to a certain strategy until a certain accuracy requirement is met. The load corresponding to the critical point that is about to exceed the limit is taken as the maximum power that the regional power grid can provide under the current operation mode.
在本发明实施例中，采用自动变步长的方法逐步向前增加负荷大小，即若增加负荷成功(即没有约束条件触发)，则以原步长继续增加负荷；若增加负荷失败(触发了约束条件)，则步长减半，如此反复，直到步长减小到满足精度要求为止，其原理如图4所示，图中弧线与坐标轴所包围部分为分区电网可正常输送的功率示意区，当前的负荷水平为S0，以原负荷为增长基数不断增加负荷，直到触发越限条件为止，然后缩小步长，最终收敛在边界点S6。In the embodiment of the present invention, the method of automatically changing the step size is used to gradually increase the load size forward, that is, if the increase in load is successful (that is, there is no constraint condition trigger), then continue to increase the load with the original step size; if the load increase fails (triggered Constraint conditions), the step size is halved, and so on, until the step size is reduced to meet the accuracy requirements. The principle is shown in Figure 4. The part surrounded by the arc and the coordinate axis in the figure is the power that can be normally transmitted by the partition grid In the schematic area, the current load level is S0 , and the original load is used as the growth base to increase the load continuously until the condition of exceeding the limit is triggered, then the step size is reduced, and finally converges at the boundary point S6 .
(3)计算分区电网负荷电气均匀系数(3) Calculation of electrical uniformity coefficient of sub-regional grid load
求取第i分区所能提供的最大功率Si-max之后，就可以根据式(1)计算第i分区的可用供电容量Si-y，本发明定义第i分区的负荷电气均匀系数Ai为：After obtaining the maximum power Si-max that the i-th subregion can provide, the available power supply capacity Siy of the i-th sub-region can be calculated according to formula (1). The load electrical uniformity coefficient Ai of the i-th sub-region is defined by the present invention as:
其中，Si-total为第i分区的电网设计供电容量，本发明实施例取Si-total为第i分区内所有220kV变电站内所有变压器容量之和。Wherein, Si-total is the designed power supply capacity of the power grid in the i-th partition, and in the embodiment of the present invention, Si-total is taken as the sum of all transformer capacities in all 220kV substations in the i-th partition.
(4)计算地区电网负荷电气均匀系数(4) Calculate the electrical uniformity coefficient of regional power grid load
本发明实施例定义地区电网负荷电气均匀系数T为：The embodiment of the present invention defines the electrical uniformity coefficient T of the regional grid load as:
其中，T为地区电网负荷电气均匀系数，且介于0与50％之间；ai为第i分区的加权系数，本发明实施例取Stotal为地区电网设计供电容量，本发明实施例取Stotal为地区电网内所有220kV变电站所有变压器容量之和。Among them,T is the electrical uniformity coefficient of regional power grid load, and is between 0 and 50%; Stotal is the design power supply capacity of the regional power grid. In the embodiment of the present invention, Stotal is taken as the sum of all transformer capacities of all 220kV substations in the regional power grid.
(5)判定条件(5) Judgment conditions
Si-y代表第i分区在当前负荷水平之下的可用供电容量，其值越大代表电网所能提供的负荷越多；如果Ai值越大在当前负荷水平之下的可用供电容量占分区电网设计供电容量的比例越大，说明分区电网的负荷分布越合理；同理，如果T越大，则说明整个地区电网的负荷分布越合理。Siy represents the available power supply capacity of the i-th partition under the current load level, the larger the value, the more load the power grid can provide; if the value of Ai is larger, the available power supply capacity under the current load level accounts for the partition power grid The larger the proportion of the designed power supply capacity, the more reasonable the load distribution of the sub-regional power grid; similarly, if T is larger, the more reasonable the load distribution of the entire regional power grid is.
通过本发明实施例，在对某一区域的电网负荷分布状况进行评估是，达到了简单明了，易于实现的技术效果。从技术层面而言，本发明实施例所需基础数据均易于获得，数据获取难度较低；本发明实施例计算方法简单，算法收敛速度快；本发明实施例计算结果物理概念明确，简单易懂。Through the embodiments of the present invention, simple, clear and easy-to-implement technical effects are achieved when evaluating the grid load distribution status in a certain area. From a technical point of view, the basic data required by the embodiments of the present invention are easy to obtain, and the difficulty of data acquisition is low; the calculation method of the embodiments of the present invention is simple, and the algorithm convergence speed is fast; the physical concept of the calculation results of the embodiments of the present invention is clear, easy to understand .
实施例2Example 2
根据本发明实施例，提供了一种评估方法的方法实施例，需要说明的是，在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的计算机系统中执行，并且，虽然在流程图中示出了逻辑顺序，但是在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤。According to an embodiment of the present invention, a method embodiment of an evaluation method is provided. It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and, although In the flowcharts, a logical order is shown, but in some cases the steps shown or described may be performed in an order different from that shown or described herein.
图5是根据本发明实施例的一种可选的评估方法的流程图，如图5所示，该方法包括如下步骤：Fig. 5 is a flowchart of an optional evaluation method according to an embodiment of the present invention. As shown in Fig. 5, the method includes the following steps:
步骤S502，获取目标区域内第一电网的第一电网接线模型的第一模型参数，第一电网接线模型用于描述在当前运行状态下第一电网的结构属性；Step S502, acquiring first model parameters of the first grid connection model of the first grid in the target area, where the first grid connection model is used to describe the structural attributes of the first grid in the current operating state;
步骤S504，根据第一电网模型的第一模型参数确定用于评估第一电网的电网负荷分布状况的基础数据；Step S504, determining basic data for evaluating the grid load distribution status of the first grid model according to the first model parameters of the first grid model;
步骤S506，根据基础数据对第一电网的电网负荷分布状况进行量化评估；Step S506, quantitatively evaluating the grid load distribution status of the first grid according to the basic data;
步骤S508，输出目标区域内第一电网的电网负荷分布状况的量化评估结果。Step S508, outputting the quantitative evaluation result of the grid load distribution status of the first grid in the target area.
在本发明实施例中，通过搭建一套包含硬件与软件在内的在线应用系统，实现电网负荷分布情况的量化评估。具体地，该系统通过EMS获得地区电网接线模式以及以地区电网某一分区内所有变压器10kV绕组侧容量的50％数值，以此为潮流计算的初始状态，通过潮流计算程序和本发明所采用的评估方法计算各个分区的可用供电容量，然后采用本发明所提出的评估方法求得各个分区的分区电网负荷电气均匀系数；最后将所有分区的分区电网负荷电气均匀系数进行加权，求得目标区域的电网负荷电气均匀系数，最后通过Web输出计算结果，并以此判断该目标区域的电网负荷分布合理程度。需要说明的是，算法部分将在本发明的方法实施例部分进行详细阐述，在此不再赘述。In the embodiment of the present invention, by building a set of online application system including hardware and software, the quantitative evaluation of the grid load distribution is realized. Specifically, the system obtains the connection mode of the regional power grid through EMS and takes the 50% value of the 10kV winding side capacity of all transformers in a certain subregion of the regional power grid as the initial state of power flow calculation. The evaluation method calculates the available power supply capacity of each subregion, and then adopts the evaluation method proposed by the present invention to obtain the electrical uniformity coefficient of the subregional grid load of each subregion; The grid load electrical uniformity coefficient, and finally output the calculation results through the Web, and use this to judge the reasonableness of the grid load distribution in the target area. It should be noted that the algorithm part will be described in detail in the method embodiment part of the present invention, and will not be repeated here.
另外，本发明实施例提出的对某个地区的电网负荷分布状况的量化评估方案，简单明了，易于实现。并且该方案所需的基础数据易于获得。In addition, the quantitative evaluation scheme for the distribution status of the grid load in a certain area proposed by the embodiment of the present invention is simple and clear, and easy to implement. And the basic data required by the program are easy to obtain.
利用本发明实施例中提供的评估方案，不仅可以评估某一个地区的电网负荷分区状况是否合理，确定该地区的电网的薄弱环节，而且可以比较同一地区的电网的不同改造方案中的电网负荷分布状况，确定最优的电网改造方案，为电网改造方案的选取提供依据。Utilizing the evaluation scheme provided in the embodiment of the present invention, not only can it be evaluated whether the grid load zoning status in a certain area is reasonable, and the weak link of the grid in this area can be determined, but also the grid load distribution in different transformation schemes of the grid in the same area can be compared The situation, determine the optimal power grid transformation plan, and provide a basis for the selection of the power grid transformation plan.
具体地，当用于比较同一地区的电网的不同改造方案中的电网负荷分布状况时，在输出目标区域内第一电网的电网负荷分布状况的量化评估结果之后，上述方法还可以包括：Specifically, when used to compare the grid load distribution status in different transformation schemes of the grid in the same area, after outputting the quantitative evaluation results of the grid load distribution status of the first grid in the target area, the above method may also include:
S2，获取目标区域内第二电网的第二电网接线模型的第二模型参数，第二电网接线模型用于描述在当前运行状态下第二电网的结构属性；S2. Obtain second model parameters of the second grid connection model of the second grid in the target area, where the second grid connection model is used to describe the structural attributes of the second grid in the current operating state;
S4，根据第二电网模型的第二模型参数确定用于评估第二电网的电网负荷分布状况的基础数据；S4. Determine the basic data for evaluating the grid load distribution status of the second grid according to the second model parameters of the second grid model;
S6，根据第二电网的电网负荷分布状况的基础数据和第一电网的电网负荷分布状况的基础数据对第二电网的电网负荷分布状况和第一电网的电网负荷分布状况进行比较，得到比较结果；S6, comparing the grid load distribution status of the second grid with the grid load distribution status of the first grid according to the basic data of the grid load distribution status of the second grid and the basic data of the grid load distribution status of the first grid, and obtaining a comparison result ;
S8，根据比较结果从第一电网和第二电网中确定出电网负荷分布均匀的电网；S8. Determine a grid with uniform grid load distribution from the first grid and the second grid according to the comparison result;
S10，将电网负荷分布均匀的电网作为量化评估结果输出。S10, outputting a power grid with uniform load distribution as a quantitative evaluation result.
通过本发明实施例，不仅可以量化评估同一地区中各个分区的局部电网负荷分布状况，而且还可以量化评估该地区中所有分区的全局电网负荷分布状况，从而达到有效量化评估某一地区的全局电网负荷分布状况的合理程度的技术效果，结合地区电网典型接线情况，以清晰明了、易于操作为原则，提出地区电网负荷分布情况量化评估方案。Through the embodiment of the present invention, not only the local power grid load distribution status of each subregion in the same region can be quantitatively evaluated, but also the global power grid load distribution status of all subregions in the region can be quantitatively evaluated, so as to achieve an effective quantitative evaluation of the global power grid in a certain region The technical effect of the reasonable degree of load distribution, combined with the typical wiring situation of the regional power grid, based on the principle of clarity and easy operation, a quantitative evaluation plan for the load distribution of the regional power grid is proposed.
可选地，目标区域包括多个分区，每个分区对应第一电网中的一个分区电网，根据第一电网模型的第一模型参数确定用于评估第一电网的电网负荷分布状况的基础数据包括：根据第一电网模型的第一模型参数确定多个分区中各个分区对应的分区电网的分区电网负荷分布状况的基础数据，根据基础数据对第一电网的电网负荷分布状况进行量化评估包括：根据各个分区对应的分区电网的分区电网负荷分布状况的基础数据计算各个分区的分区电网负荷电气均匀系数；根据各个分区的分区电网负荷电气均匀系数计算目标区域的第一电网负荷电气均匀系数；根据第一电网负荷电气均匀系数对第一电网的电网负荷分布状况进行量化评估。Optionally, the target area includes a plurality of subregions, each subregion corresponds to a subregional power grid in the first power grid, and the basic data for evaluating the power grid load distribution status of the first power grid determined according to the first model parameters of the first power grid model include : According to the first model parameters of the first grid model, the basic data of the grid load distribution status of the grid corresponding to each of the multiple grids is determined, and the quantitative evaluation of the load distribution status of the first grid based on the basic data includes: according to Calculate the electrical uniformity coefficient of the regional grid load of each partition based on the basic data of the partition grid load distribution status of the partition grid corresponding to each partition; calculate the first grid load electrical uniformity coefficient of the target area according to the partition grid load electrical uniformity coefficient of each partition; A power grid load electrical uniformity coefficient quantifies and evaluates the power grid load distribution status of the first power grid.
可选地，通过以下公式计算各个分区的分区电网负荷电气均匀系数：Optionally, the electrical uniformity coefficient of the regional grid load for each partition is calculated by the following formula:
Si-y＝Si-max-Si-o， (1)Siy =Si-max- Sio , (1)
Si-max＝Si-o+mSi-d， (2)Si-max =Sio +mSid , (2)
其中，Si-y为第i分区的可用供电容量，Si-max为第i分区所能提供的最大功率，Si-o为第i分区内所有10kV变压器绕组侧容量的50％，m为实数，Sd为负荷增长步长，Si-total为第i分区的电网设计供电容量，Ai第i分区电网的负荷电气均匀系数。Among them, Siy is the available power supply capacity of the i-th partition, Si-max is the maximum power that the i-th partition can provide, Sio is 50% of the winding side capacity of all 10kV transformers in the i-th partition, m is a real number, Sd is the load growth step, Si-total is the design power supply capacity of the power grid in the i-th partition, and Ai is the load electrical uniformity coefficient of the i-th partition grid.
通过本发明实施例采用公式(1)、(2)、(3)计算各分区电网的负荷电气均匀系数的方法简单，算法收敛速度快。According to the embodiment of the present invention, the method of calculating the load electrical uniformity coefficient of each sub-regional power grid by using the formulas (1), (2) and (3) is simple, and the convergence speed of the algorithm is fast.
可选地，通过以下公式计算目标区域的第一电网负荷电气均匀系数：Optionally, the electrical uniformity coefficient of the first grid load in the target area is calculated by the following formula:
其中，T为目标区域的第一电网负荷电气均匀系数，ai为第i分区的加权系数。Among them, T is the electrical uniformity coefficient of the first grid load in the target area, and ai is the weighting coefficient of the i-th partition.
通过本发明实施例，在对某一区域的电网负荷分布状况进行评估是，达到了简单明了，易于实现的技术效果。从技术层面而言，本发明实施例所需基础数据均易于获得，数据获取难度较低；本发明实施例计算方法简单，算法收敛速度快；本发明实施例计算结果物理概念明确，简单易懂。Through the embodiments of the present invention, simple, clear and easy-to-implement technical effects are achieved when evaluating the grid load distribution status in a certain area. From a technical point of view, the basic data required by the embodiments of the present invention are easy to obtain, and the difficulty of data acquisition is low; the calculation method of the embodiments of the present invention is simple, and the algorithm convergence speed is fast; the physical concept of the calculation results of the embodiments of the present invention is clear, easy to understand .
实施例3Example 3
根据本发明实施例，提供了一种评估装置的装置实施例。According to an embodiment of the present invention, a device embodiment of an evaluation device is provided.
图6是根据本发明实施例的一种可选的评估装置的示意图，如图6所示，该评估系统包括评估装置。该评估装置包括：第一获取单元602，用于获取目标区域内第一电网的第一电网接线模型的第一模型参数，第一电网接线模型用于描述在当前运行状态下第一电网的结构属性；第一确定单元604，用于根据第一电网模型的第一模型参数确定用于评估第一电网的电网负荷分布状况的基础数据；评估单元606，用于根据基础数据对第一电网的电网负荷分布状况进行量化评估；输出单元608，用于输出目标区域内第一电网的电网负荷分布状况的量化评估结果。Fig. 6 is a schematic diagram of an optional evaluation device according to an embodiment of the present invention. As shown in Fig. 6, the evaluation system includes the evaluation device. The evaluation device includes: a first acquisition unit 602, configured to acquire first model parameters of a first grid connection model of a first grid in the target area, the first grid connection model being used to describe the structure of the first grid in the current operating state attribute; the first determining unit 604 is used to determine the basic data used to evaluate the grid load distribution status of the first grid model according to the first model parameters of the first grid model; Quantitative evaluation of the grid load distribution status; the output unit 608, configured to output the quantitative evaluation result of the grid load distribution status of the first grid in the target area.
利用本发明实施例中提供的评估方案，不仅可以评估某一个地区的电网负荷分区状况是否合理，确定该地区的电网的薄弱环节，而且可以比较同一地区的电网的不同改造方案中的电网负荷分布状况，确定最优的电网改造方案，为电网改造方案的选取提供依据。Utilizing the evaluation scheme provided in the embodiment of the present invention, not only can it be evaluated whether the grid load zoning status in a certain area is reasonable, and the weak link of the grid in this area can be determined, but also the grid load distribution in different transformation schemes of the grid in the same area can be compared The situation, determine the optimal power grid transformation plan, and provide a basis for the selection of the power grid transformation plan.
具体地，当用于比较同一地区的电网的不同改造方案中的电网负荷分布状况时，上述装置还可以包括：第二获取单元，用于在输出目标区域内第一电网的电网负荷分布状况的量化评估结果之后，获取目标区域内第二电网的第二电网接线模型的第二模型参数，第二电网接线模型用于描述在当前运行状态下第二电网的结构属性；第二确定单元，用于根据第二电网模型的第二模型参数确定用于评估第二电网的电网负荷分布状况的基础数据；比较单元，用于根据第二电网的电网负荷分布状况的基础数据和第一电网的电网负荷分布状况的基础数据对第二电网的电网负荷分布状况和第一电网的电网负荷分布状况进行比较，得到比较结果；第三确定单元，用于根据比较结果从第一电网和第二电网中确定出电网负荷分布均匀的电网；输出单元还用于将电网负荷分布均匀的电网作为量化评估结果输出。Specifically, when used to compare the grid load distribution status in different transformation schemes of the grid in the same area, the above-mentioned device may further include: a second acquisition unit, used to obtain the grid load distribution status of the first grid in the output target area After quantifying the evaluation results, the second model parameters of the second grid connection model of the second grid in the target area are obtained, and the second grid connection model is used to describe the structural attributes of the second grid in the current operating state; the second determination unit uses Based on determining the basic data for evaluating the grid load distribution status of the second grid according to the second model parameters of the second grid model; the comparison unit is used for determining the basic data of the grid load distribution status of the second grid and the grid The basic data of the load distribution status compares the grid load distribution status of the second grid with the grid load distribution status of the first grid to obtain a comparison result; the third determination unit is used to select from the first grid and the second grid according to the comparison result A grid with uniform grid load distribution is determined; the output unit is also used to output the grid with uniform grid load distribution as a quantitative evaluation result.
可选地，上述目标区域可以包括多个分区，每个分区对应第一电网中的一个分区电网，第一确定单元还用于根据第一电网模型的第一模型参数确定多个分区中各个分区对应的分区电网的分区电网负荷分布状况的基础数据。相应的，评估单元包括：第一计算模块，用于根据各个分区对应的分区电网的分区电网负荷分布状况的基础数据计算各个分区的分区电网负荷电气均匀系数；第二计算模块，用于根据各个分区的分区电网负荷电气均匀系数计算目标区域的第一电网负荷电气均匀系数；评估模块，用于根据第一电网负荷电气均匀系数对第一电网的电网负荷分布状况进行量化评估。Optionally, the above-mentioned target area may include a plurality of subregions, each subregion corresponds to a subregional power grid in the first power grid, and the first determining unit is further configured to determine each of the plurality of subregions according to the first model parameters of the first power grid model The basic data of the load distribution status of the corresponding sub-regional power grid. Correspondingly, the evaluation unit includes: a first calculation module, which is used to calculate the electrical uniformity coefficient of the sub-region grid load of each sub-region according to the basic data of the sub-region grid load distribution status corresponding to each sub-region; Calculate the first grid load electrical uniformity coefficient of the target area according to the subregional grid load electrical uniformity coefficient; the evaluation module is used to quantitatively evaluate the grid load distribution status of the first grid according to the first grid load electrical uniformity coefficient.
通过本发明实施例，不仅可以量化评估同一地区中各个分区的局部电网负荷分布状况，而且还可以量化评估该地区中所有分区的全局电网负荷分布状况，从而达到有效量化评估某一地区的全局电网负荷分布状况的合理程度的技术效果，结合地区电网典型接线情况，以清晰明了、易于操作为原则，提出地区电网负荷分布情况量化评估方案。Through the embodiment of the present invention, not only the local power grid load distribution status of each subregion in the same region can be quantitatively evaluated, but also the global power grid load distribution status of all subregions in the region can be quantitatively evaluated, so as to achieve an effective quantitative evaluation of the global power grid in a certain region The technical effect of the reasonable degree of load distribution, combined with the typical wiring situation of the regional power grid, based on the principle of clarity and easy operation, a quantitative evaluation plan for the load distribution of the regional power grid is proposed.
可选地，第一计算模块还用于通过以下公式计算各个分区的分区电网负荷电气均匀系数：Si-y＝Si-max-Si-o，Si-max＝Si-o+mSi-d，其中，Si-y为第i分区的可用供电容量，Si-max为第i分区所能提供的最大功率，Si-o为第i分区内所有10kV变压器绕组侧容量的50％，m为实数，Sd为负荷增长步长，Si-total为第i分区的电网设计供电容量，Ai第i分区电网的负荷电气均匀系数。Optionally, the first calculation module is also used to calculate the electrical uniformity coefficient of the grid load of each zone by the following formula: Siy =Si-max -Sio , Si-max =Sio +mSid , Among them, Siy is the available power supply capacity of the i-th partition, Si-max is the maximum power that the i-th partition can provide, Sio is 50% of the winding side capacity of all 10kV transformers in the i-th partition, m is a real number, Sd is the load growth step, Si-total is the design power supply capacity of the power grid in the i-th partition, and Ai is the load electrical uniformity coefficient of the i-th partition grid.
可选地，第二计算模块还用于通过以下公式计算目标区域的第一电网负荷电气均匀系数：其中，T为目标区域的第一电网负荷电气均匀系数，ai为第i分区的加权系数。Optionally, the second calculation module is also used to calculate the electrical uniformity coefficient of the first grid load in the target area by the following formula: Among them, T is the electrical uniformity coefficient of the first grid load in the target area, and ai is the weighting coefficient of the i-th partition.
需要说明的是，本发明的装置实施例中提供的装置可以用于执行方法实施例中提供的方法，而方法实施例中提供的方法可以用于生成装置实施例中提供的装置，并且装置与系统相互适用，因此，系统、方法、装置部分的内容类似，可以相互参考，三个实施例中相互重合的内容，本发明在其中一个实施例中做了详细阐述，在其它实施例中不再赘述。It should be noted that the device provided in the device embodiment of the present invention can be used to execute the method provided in the method embodiment, and the method provided in the method embodiment can be used to generate the device provided in the device embodiment, and the device and The systems are applicable to each other. Therefore, the contents of the systems, methods, and devices are similar and can be referred to each other. The contents that overlap each other in the three embodiments are described in detail in one of the embodiments of the present invention, and will not be repeated in other embodiments. repeat.
上述本发明实施例序号仅仅为了描述，不代表实施例的优劣。The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.
在本发明的上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。In the above-mentioned embodiments of the present invention, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.
在本申请所提供的几个实施例中，应该理解到，所揭露的技术内容，可通过其它的方式实现。其中，以上所描述的装置实施例仅仅是示意性的，例如所述单元的划分，可以为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，单元或模块的间接耦合或通信连接，可以是电性或其它的形式。In the several embodiments provided in this application, it should be understood that the disclosed technical content can be realized in other ways. Wherein, the device embodiments described above are only illustrative. For example, the division of the units may be a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or may be Integrate into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of units or modules may be in electrical or other forms.
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可为个人计算机、服务器或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、只读存储器(ROM，Read-OnlyMemory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage media include: various media that can store program codes such as U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510370224.6ACN104881822A (en) | 2015-06-29 | 2015-06-29 | Evaluation method, device and system |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510370224.6ACN104881822A (en) | 2015-06-29 | 2015-06-29 | Evaluation method, device and system |
| Publication Number | Publication Date |
|---|---|
| CN104881822Atrue CN104881822A (en) | 2015-09-02 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510370224.6APendingCN104881822A (en) | 2015-06-29 | 2015-06-29 | Evaluation method, device and system |
| Country | Link |
|---|---|
| CN (1) | CN104881822A (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105426300A (en)* | 2015-10-20 | 2016-03-23 | 中国电力科学研究院 | Power system CIM/E model standard conformance testing system and method |
| CN108320068A (en)* | 2017-12-15 | 2018-07-24 | 国家电网公司 | Substation's distribution rationality judgment method and terminal device |
| CN112600193A (en)* | 2020-11-26 | 2021-04-02 | 国网北京市电力公司 | Load evaluation method and device for power distribution network |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110004406A1 (en)* | 2009-03-31 | 2011-01-06 | Gridpoint, Inc. | Systems and methods for location determination of devices using network fingerprints for power management |
| CN102360475A (en)* | 2011-10-28 | 2012-02-22 | 天津市电力公司 | Comprehensive evaluation method for coordination of power supply capacity of urban power transmission and distribution network |
| JP2012110220A (en)* | 2010-11-18 | 2012-06-07 | General Electric Co <Ge> | Methods and systems for power system grid management |
| CN102567650A (en)* | 2012-03-12 | 2012-07-11 | 广东省电力调度中心 | System for evaluating adequacy of power supply system |
| CN103116807A (en)* | 2012-12-12 | 2013-05-22 | 天津市电力公司 | Functional area power distribution network refined planning method |
| CN104716641A (en)* | 2015-01-06 | 2015-06-17 | 上海电力学院 | Method for assessing power supply capacity of power distribution network provided with distributed generation |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110004406A1 (en)* | 2009-03-31 | 2011-01-06 | Gridpoint, Inc. | Systems and methods for location determination of devices using network fingerprints for power management |
| JP2012110220A (en)* | 2010-11-18 | 2012-06-07 | General Electric Co <Ge> | Methods and systems for power system grid management |
| CN102360475A (en)* | 2011-10-28 | 2012-02-22 | 天津市电力公司 | Comprehensive evaluation method for coordination of power supply capacity of urban power transmission and distribution network |
| CN102567650A (en)* | 2012-03-12 | 2012-07-11 | 广东省电力调度中心 | System for evaluating adequacy of power supply system |
| CN103116807A (en)* | 2012-12-12 | 2013-05-22 | 天津市电力公司 | Functional area power distribution network refined planning method |
| CN104716641A (en)* | 2015-01-06 | 2015-06-17 | 上海电力学院 | Method for assessing power supply capacity of power distribution network provided with distributed generation |
| Title |
|---|
| 刘若溪等: "地区电网备自投在线投退控制策略（二）考虑备用电源侧可用供电能力的备自投控制策略", 《电力自动化设备》* |
| 刘若溪等: "地区电网输电安全水平在线评估算法与系统设计", 《电网技术》* |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105426300A (en)* | 2015-10-20 | 2016-03-23 | 中国电力科学研究院 | Power system CIM/E model standard conformance testing system and method |
| US11176028B2 (en) | 2015-10-20 | 2021-11-16 | China Electric Power Research Institute Company Limited | System, method and storage device for CIM/E model standard compliance test |
| CN108320068A (en)* | 2017-12-15 | 2018-07-24 | 国家电网公司 | Substation's distribution rationality judgment method and terminal device |
| CN108320068B (en)* | 2017-12-15 | 2021-06-15 | 国家电网公司 | Method for judging the rationality of distribution of substations and terminal equipment |
| CN112600193A (en)* | 2020-11-26 | 2021-04-02 | 国网北京市电力公司 | Load evaluation method and device for power distribution network |
| Publication | Publication Date | Title |
|---|---|---|
| Mohammed et al. | Available transfer capability calculation methods: A comprehensive review | |
| CN111208384B (en) | Smart power grids management system | |
| CN104377826B (en) | Active power distribution network control strategy and method | |
| CN111026900A (en) | Power distribution network wiring group generation and net rack topological graph generation method and device | |
| CN104835018B (en) | The reliability estimation method and device of medium voltage distribution network rack | |
| CN110060179B (en) | Multi-voltage-level maintenance plan optimization method and device based on risk overlapping degree | |
| CN113300353B (en) | Power grid partition load margin calculation method and device considering N-1 reliability | |
| CN107977772A (en) | One kind considers the probabilistic distribution network planning method and system of distributed energy | |
| CN116995799A (en) | A distributed power supply access and panoramic management and control application method and system | |
| CN117096930A (en) | Application method and system of distributed resource group modulation group control technology | |
| CN108400597B (en) | Static safety analysis method for DC fault considering safety control and primary frequency modulation characteristics | |
| CN106846174A (en) | Method and device for power distribution network situation perception based on data fusion | |
| CN104881822A (en) | Evaluation method, device and system | |
| Athanasiadis et al. | A benchmarking testbed for low-voltage active distribution network studies | |
| CN104935249B (en) | Photovoltaic power generation system stability verification method and apparatus | |
| CN106408206A (en) | Reliability evaluation method for power distribution network containing microgrid formed by photovoltaic power generation | |
| CN104036074A (en) | Low voltage discrimination method for distribution substation regions | |
| CN104009469B (en) | A kind of low-voltage distribution network platform district network topology isopleth map collecting method | |
| CN108075464A (en) | The modeling of electricity net safety stable rule and On-line matching method | |
| CN111697575B (en) | Flexibility-improved quantitative analysis method, device and system | |
| CN106651136B (en) | Day-ahead power generation plan compiling method and device for bilateral transaction | |
| Sun et al. | Assessing wind curtailment under different wind capacity considering the possibilistic uncertainty of wind resources | |
| CN102509161A (en) | Line loss four-Ins management system and partial pressure, bus and main modified line loss construction method therefor | |
| Chen et al. | Optimal allocation of power-electronic interfaced wind turbines using a genetic algorithm–monte carlo hybrid optimization method | |
| Haghifam et al. | State estimation in electric distribution networks in presence of distributed generation using the PMUs |
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