技术领域technical field
本发明涉及电力系统运行控制方法技术领域，尤其涉及一种基于风电消纳最大化的风-火-核-抽水储能联合发电机组调度运行方法。The invention relates to the technical field of power system operation control methods, in particular to a wind-fire-nuclear-pumped storage combined generating set scheduling operation method based on maximizing wind power consumption.
背景技术Background technique
近年来，能源与环境问题日益突出，以风电、核电为代表的新兴能源因其无污染、无温室气体排放、可再生特性，已成为能源发展的重要方向。抽水蓄能机组作为一种特殊电源，在负荷低谷时抽水，负荷高峰时发电，既避免了火电机组的低谷调停，又满足高峰负荷的需要，成为解决电网调峰问题的首选。随着我国电力系统装机容量不断提升，电源类型和负荷类型不断趋于多样化，电网日常运行的调峰任务以及对大规模清洁能源的消纳任务也变得越来越困难，不能简单的通过火电机组调节来完成，而一种行之有效的途径就是提高包括风电、火电、核电和抽水储能的多种电源的协调优化调度水平。In recent years, energy and environmental issues have become increasingly prominent. Emerging energy represented by wind power and nuclear power has become an important direction of energy development because of its non-polluting, no greenhouse gas emissions, and renewable characteristics. As a special power source, the pumped storage unit pumps water when the load is low and generates power when the load is peak. As the installed capacity of my country's power system continues to increase, the types of power sources and load types continue to diversify, and the task of peak regulation in the daily operation of the power grid and the task of accommodating large-scale clean energy has become more and more difficult. The regulation of thermal power units can be completed, and an effective way is to improve the level of coordination and optimization of various power sources including wind power, thermal power, nuclear power and pumped storage.
通过对现有文献的检索发现，现有的基于风电消纳最大化的风-火-核-抽水储能联合发电机组调度运行方法的研究相对较少，且存在以下四个问题：1)在建立风-火-核-抽水储能联合机组运行模型时，许多研究以电厂整体运行成本最低、燃料消耗最少作为优化目标；2)联合机组运行模型中核电机组大多始终保持基荷运行状态；3)联合机组运行模型中对于风电不确定性处理精确度较高，但实际实现较困难；4)联合机组运行模型中对抽水储能机组水库的越限问题考虑较少。Through the search of existing literature, it is found that there are relatively few studies on the scheduling operation method of wind-thermal-nuclear-pumped storage combined generating units based on the maximization of wind power consumption, and there are the following four problems: 1) When establishing the operation model of wind-thermal-nuclear-pumped storage combined unit, many studies set the lowest overall operating cost of the power plant and the least fuel consumption as the optimization goals; 2) In the combined unit operation model, most nuclear power units always maintain the base load operation state;3 ) In the combined unit operation model, the processing accuracy of wind power uncertainty is high, but it is difficult to realize in practice; 4) In the combined unit operation model, the problem of exceeding the limit of the pumped storage unit reservoir is less considered.
发明内容Contents of the invention
本发明所要解决的技术问题是如何提供一种更利于电网调度，满足电网利益最大化，风电消纳能力最大化的联合发电机组调度运行方法。The technical problem to be solved by the present invention is how to provide a dispatching operation method of a combined generating set that is more conducive to power grid dispatching, satisfies the maximization of power grid benefits, and maximizes wind power absorptive capacity.
为解决上述技术问题，本发明所采取的技术方案是：一种基于风电消纳最大化的风-火-核-抽水储能联合机组调度运输方法，其特征在于包括如下步骤：In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a wind-fire-nuclear-pumped energy storage combined unit dispatching and transportation method based on the maximization of wind power consumption, which is characterized in that it includes the following steps:
1)：获取电力系统中火电机组的台数和运行参数、风电机组的台数和运行参数、核电机组的台数和运行参数、抽水储能机组的台数和运行参数、电力系统的负荷模型和风电预测数据；1): Obtain the number and operating parameters of thermal power units in the power system, the number and operating parameters of wind power units, the number and operating parameters of nuclear power units, the number and operating parameters of pumped storage units, the load model of the power system and wind power forecast data ;
2)：根据所述电力系统中火电机组的台数和运行参数、风电机组的台数和运行参数、核电机组的台数和运行参数、抽水储能机组的台数和运行参数、电力系统的负荷数据和风电预测数据，建立优化的机组组合调度运行方法模型；2): According to the number and operating parameters of thermal power units in the power system, the number and operating parameters of wind power units, the number and operating parameters of nuclear power units, the number and operating parameters of pumped storage units, the load data of the power system and the wind power Predict data and establish an optimized unit combination dispatching operation method model;
3)：根据所述优化的机组组合调度运行方法模型，计算电网收益最大化，风电消纳最大化的机组联合运行结果。3): According to the optimized unit combination scheduling operation method model, calculate the joint operation result of the unit that maximizes the grid revenue and maximizes wind power consumption.
进一步的技术方案在于：步骤1)中获取的电力系统负荷模型用于确定某个季度每天的负荷曲线，再用统计方法估计每天负荷峰值出现的时间段和谷值出现的时间段。A further technical solution is: the power system load model obtained in step 1) is used to determine the daily load curve of a certain season, and then statistical methods are used to estimate the time period of the daily load peak and the time period of the valley.
目前核电机组广泛采用的较为安全经济的运行方式“12-3-6-3”的运行方式，将核电机组基荷运行的时间段和67％出力的时间段与分别与风电出力谷值出现的时间段的时间段和峰值出现的时间段相配合。At present, the relatively safe and economical operation mode "12-3-6-3" is widely adopted by nuclear power units. The time period of the time period matches the time period in which the peak occurs.
进一步的技术方案在于：核电机组配合电网负荷情况的运行方式，核电机组配合出力的时间安排，根据电网安排调度的不同月份时间，确定该月所属季度，最终由估计得到的该季度每天负荷的负荷峰、谷值大致出现时间来确定。The further technical solution lies in: the operation mode of the nuclear power unit in accordance with the load situation of the power grid, the time arrangement of the nuclear power unit in coordination with the output, according to the time of different months of the power grid arrangement and scheduling, determine the quarter to which the month belongs, and finally obtain the estimated daily load of the quarter The approximate time of occurrence of peak and valley values is determined.
进一步的技术方案在于，步骤1)中风电预测数据的方法如下：A further technical solution is that the method of wind power prediction data in step 1) is as follows:
设实际风电的实际有功出力Wj服从Beta分布，其累计概率分布函数为：Assuming that the actual active output Wj of the actual wind power obeys the Beta distribution, its cumulative probability distribution function is:
式(1)，(2)中的α和β通过风电预测出力的均值和方差求得：α and β in formula (1), (2) are obtained by the mean value and variance of wind power forecast output:
考虑风电出力不确定性，转换为考虑事件风电计划出力Pw,j小于实际有功出力Wj的概率满足一定条件：Considering the uncertainty of wind power output, it is converted to consider the probability that the event wind power planned output Pw,j is less than the actual active output Wj satisfies certain conditions:
Pr{Pw,j≤Wj}≥ρ (5)Pr{Pw,j ≤Wj }≥ρ (5)
ρ为置信度，取0.9，表示事件风电计划出力Pw,j小于实际有功出力Wj的概率为90％；式(5)经过变形可转换为：ρ is the confidence level, taking 0.9, it means that the probability that the event wind power planned output Pw,j is less than the actual active output Wj is 90%; formula (5) can be transformed into:
进一步的技术方案在于，步骤2)中构建优化的机组组合调度运行方法模型包括：A further technical solution is that in step 2), the optimized unit combination dispatching operation method model constructed in step 2) includes:
目标函数：Objective function:
①电网经济性最好：① The grid economy is the best:
式中：NG为区域内所有发电机组的总数，包括火电机组，核电机组，风电机组和抽水储能机组；ki'为电网在t时刻的售电价格，Pi'为电网在t时刻售电量，ki为电网从电厂的购电价格，Pi为电网在t时刻从电厂的购电量，这里默认电厂各机组按照电网调度任务发电，机组发电量即为电厂购电量；In the formula: NG is the total number of all generating units in the region, including thermal power units, nuclear power units, wind power units and pumped storage units; ki ' is the electricity sales price of the grid at time t, and Pi ' is Electricity sales,ki is the electricity purchase price of the power grid from the power plant, and Pi is the electricity purchased by the power grid from the power plant at time t. Here, each unit of the power plant is defaulted to generate power according to the grid scheduling task, and the power generation of the unit is the power purchase of the power plant;
②风电消纳最大：② Maximum wind power consumption:
式中：Nwind为区域内风电机组总数，Pw,j为风电机组计划出力；In the formula: Nwind is the total number of wind turbines in the area, and Pw,j is the planned output of wind turbines;
约束条件：Restrictions:
①功率平衡：①Power balance:
式中，NH，Nwind,Nunclaer和Nc分别为区域内火电机组，风电机组，核电机组和抽水储能机组的总数；PH,k,Pw,j,Pu,l和Pc,m分别为在t时刻下火电，风电，核电和抽水储能各机组出力；Pload为t时刻下所需的电力负荷总量；In the formula, NH , Nwind , Nunclaer and Nc are the total number of thermal power units, wind power units, nuclear power units and pumped storage units in the region respectively; PH,k ,Pw,j ,Pu,l and Pc and m are respectively the output of thermal power, wind power, nuclear power and pumped storage at time t; Pload is the total power load required at time t;
考虑核电与负荷配合，其在不同时间出力如下：Considering the cooperation between nuclear power and load, its output at different times is as follows:
式中Pr为核电机组的额定功率；where Pr is the rated power of the nuclear power unit;
②出力约束：②Output constraints:
风电出力约束包括式(6)，(11)，(12)：Wind power output constraints include formulas (6), (11), (12):
0≤Pw,j≤Wmax (11)0≤Pw,j ≤Wmax (11)
式(6)用来表征风电出力具有不确定性；式(11)表示计划有功出力必须小于风电场的装机容量，式中Wmax为装机容量；式(12)表示允许弃风，但不能超过风电预期平均值，弃风量用预测平均值与实际出力值之差表示：Equation (6) is used to represent the uncertainty of wind power output; Equation (11) indicates that the planned active output must be less than the installed capacity of the wind farm, where Wmax is the installed capacity; Equation (12) indicates that wind power curtailment is allowed, but cannot exceed The expected average value of wind power, the amount of abandoned wind is expressed by the difference between the predicted average value and the actual output value:
抽水储能机组出力约束包括式(14)：The output constraints of the pumped storage unit include formula (14):
抽水储能机组在发电状态下功率可调，在抽水状态下功率为恒定的抽水功率；Pmin、Pmax分别为抽水蓄能电站机组的最小、最大发电功率；Pchou为恒定的抽水功率；当抽蓄机组的出力为0时，表示其停止工作；机组运行在抽水状态时，将其视为负荷；The power of the pumped storage unit is adjustable in the power generation state, and the power is a constant pumping power in the pumping state; Pmin and Pmax are the minimum and maximum generating power of the pumped storage power plant unit respectively; Pchou is the constant pumping power; When the output of the pumped storage unit is 0, it means that it stops working; when the unit is running in the state of pumping water, it is regarded as a load;
火电出力约束包括式(15)：Thermal power output constraints include formula (15):
PH,min≤PH≤PH,max (15)PH,min ≤PH ≤PH,max (15)
式中PH,min和PH,max分别为火电机组最小，最大出力；In the formula, PH,min and PH,max are the minimum and maximum output of the thermal power unit respectively;
③爬坡约束：③Climbing constraints:
火电机组爬坡约束为式(16)：The climbing constraint of the thermal power unit is formula (16):
PH,down≤ΔPH≤PH,up (16)PH,down ≤ΔPH ≤PH,up (16)
式中PH,down和PH,up为火电机组出力的最大的下降和上升速度；In the formula, PH,down and PH,up are the maximum descending and rising speeds of thermal power unit output;
抽水储能机组的爬坡约束即需要考虑机组水库是否越限的问题，在相邻时间点求得机组出力大小时，需要使用越限判断程序来检验出力结果是否可行；The climbing constraint of the pumped storage unit needs to consider whether the reservoir of the unit exceeds the limit. When the output of the unit is obtained at adjacent time points, it is necessary to use the limit judgment procedure to check whether the output result is feasible;
④备用：④ Spare:
5％和15％分别为负荷波动对备用需求系数和风电波动对备用需求系数。5% and 15% are the load fluctuation to backup demand coefficient and the wind power fluctuation to backup demand coefficient respectively.
进一步的技术方案在于，求得机组出力数据，时间间隔为15min，即式(7)，(8)，(17)中T在一天中取96。A further technical solution is to obtain unit output data with a time interval of 15 minutes, that is, T in formulas (7), (8), and (17) is 96 in one day.
进一步的技术方案在于，爬坡约束中，抽水储能机组水库越限判断流程包括以下步骤：A further technical solution is that, in the climbing constraint, the process of judging the pumped energy storage unit's reservoir exceeding the limit includes the following steps:
步骤1：从系统计算得到的一组最优解中，提取出抽水储能机组的出力数据，并按照时间顺序将其排列，第一个时间点得到的数据记为Pc,0，其后按次序记为Pc,1、Pc,2……Pc,T-1，；初始化水量Z和时间t＝0，进行步骤2；Step 1: Extract the output data of the pumped storage units from a group of optimal solutions calculated by the system, and arrange them in chronological order. The data obtained at the first time point is denoted as Pc,0 , and then Recorded in sequence as Pc,1 , Pc,2 ... Pc,T-1 ; initialize water volume Z and time t=0, proceed to step 2;
步骤2：判断Pc,t是否为正值，“是”则进行步骤3，否则进行步骤9；Step 2: Determine whether Pc, t is a positive value, if "yes", go to step 3, otherwise go to step 9;
步骤3：抽水机组出力为正值，认为机组处于发电状态，计算发电状态下水库流水量进行步骤4(当机组处于发电状态时，发电量之比等于水库流水量之比，Pr为抽水储能电站最大发电功率，Zmax为最大发电功率对应的最大流水量)；Step 3: The output of the pumping unit is positive, and the unit is considered to be in the power generation state, and the reservoir flow is calculated under the power generation state Proceed to step 4 (when the unit is in the power generation state, the ratio of power generation is equal to the ratio of the reservoir flow, Pr is the maximum power generation power of the pumped storage power station, and Zmax is the maximum flow rate corresponding to the maximum power generation);
步骤4：计算当前上水库水量Z＝Z-ΔZ，进行步骤5；Step 4: Calculate the current amount of water in the upper reservoir Z=Z-ΔZ, and proceed to Step 5;
步骤5：判断当前水库水量是否满足库容限值，Zmin≤Z≤Zmax，“是”则进行步骤6，“否”则进行步骤7；Step 5: Judging whether the current reservoir water volume meets the storage capacity limit, Zmin ≤ Z ≤ Zmax , if "Yes", proceed to Step 6, and "No", proceed to Step 7;
步骤6；累积时间量，t＝t+1，进行步骤8；Step 6; accumulative amount of time, t=t+1, go to step 8;
步骤7：输出“非最优解”，此时存在水库越限现象，跳出程序；Step 7: Output "non-optimal solution", at this time there is a phenomenon that the reservoir exceeds the limit, and jump out of the program;
步骤8：判断时间量是否达到最大，以此判断程序是否将最优解子集中全部数据都检验完毕，“否”则进行步骤2，“是”则输出“最优解”，并结束程序；Step 8: Determine whether the amount of time has reached the maximum, so as to determine whether the program has checked all the data in the optimal solution subset, if "No", proceed to Step 2, and if "Yes", output the "optimal solution" and end the program;
步骤9：判断Pc,t+1是否为0，“是”则进行步骤10；“否”则进行步骤11；Step 9: Judging whether Pc,t+1 is 0, if "Yes", proceed to Step 10; "No", proceed to Step 11;
步骤10：此时认为机组出力为0，处于停机状态，流水量为0，水位保持不变并进行步骤5；Step 10: At this time, it is considered that the output of the unit is 0, it is in a shutdown state, the flow rate is 0, and the water level remains unchanged, and proceed to step 5;
步骤11：此时认为机组出力为负，处于抽水状态；抽水状态下，认为机组始终保持最大功率，抽水量为最大流量，计算当前上水库水量Z＝Z+Zmax，进行步骤5。Step 11: At this time, it is considered that the output of the unit is negative, and it is in the pumping state; in the pumping state, it is considered that the unit maintains the maximum power all the time, and the pumped water is the maximum flow, calculate the current water volume of the upper reservoir Z=Z+Zmax , and proceed to step 5.
优选的，步骤3)计算机组联合运行结果采用的方法为粒子群算法。Preferably, in step 3) the method adopted by the joint operation result of the computer group is the particle swarm optimization algorithm.
采用上述技术方案所产生的有益效果在于：所述方法以电网调度成本最低和风电消纳最大作为优化目标，使联合机组模型的运行结果更利于电网调度，满足电网利益最大化，风电消纳能力最大化；将核电运行状态与负荷峰谷匹配，使其较大的调峰容量和调峰深度的优点得以体现；使用风电出力预测误差的概率分布函数来表示风电出力不确定性，考虑抽水储能机组水库越限的问题，保证了模型精确性和实用性。The beneficial effect of adopting the above technical scheme is that: the method takes the lowest grid dispatching cost and the largest wind power consumption as optimization goals, so that the operation result of the combined unit model is more conducive to grid scheduling, and satisfies the maximization of grid benefits and the wind power consumption capacity. Maximize; match the operating status of nuclear power with load peaks and valleys to reflect the advantages of larger peak-shaving capacity and peak-shaving depth; use the probability distribution function of wind power output forecast error to represent the uncertainty of wind power output, and consider the pumping storage The problem of out-of-limit of the energy unit reservoir ensures the accuracy and practicability of the model.
附图说明Description of drawings
下面结合附图和具体实施方式对本发明作进一步详细的说明。The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
图1是本发明实施例所述方法的流程图；Fig. 1 is the flowchart of the method described in the embodiment of the present invention;
图2是本发明实施例所述方法中抽水储能电站水库越限流程图；Fig. 2 is a flow chart of exceeding the limit of the reservoir of the pumped storage power station in the method described in the embodiment of the present invention;
图3是本发明实施例所述方法中典型负荷曲线图；Fig. 3 is a typical load curve diagram in the method described in the embodiment of the present invention;
图4是本发明实施例所述方法中某天发电预测曲线图；Fig. 4 is a power generation forecast curve diagram of a certain day in the method described in the embodiment of the present invention;
图5是本发明实施例所述方法中粒子群算法的流程图；Fig. 5 is the flowchart of particle swarm optimization algorithm in the method described in the embodiment of the present invention;
图6是本发明实施例所述方法中联合机组最优运行结果图；Fig. 6 is a diagram of the optimal operation result of the combined unit in the method described in the embodiment of the present invention;
图7是风电机组优化前后出力曲线图。Fig. 7 is the output curve of the wind turbine before and after optimization.
具体实施方式detailed description
下面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的一部分实施例，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，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是本发明还可以采用其他不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本发明内涵的情况下做类似推广，因此本发明不受下面公开的具体实施例的限制。In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.
下面结合附图以及2015年辽宁电网实例对本发明作进一步详细说明。The present invention will be described in further detail below in conjunction with accompanying drawing and the example of Liaoning power grid in 2015.
总体的，如图1所示，本发明实施例公开了一种基于风电消纳最大化的风-火-核-抽水储能联合发电机组调度运行方法，包括如下步骤：In general, as shown in Figure 1, the embodiment of the present invention discloses a wind-fire-nuclear-pumped storage combined generating set scheduling operation method based on maximizing wind power consumption, including the following steps:
1)获取电力系统中火电机组的台数和运行参数、风电机组的台数和运行参数、核电机组的台数和运行参数、抽水储能机组的台数和运行参数、电力系统的负荷数据和风电预测数据。1) Obtain the number and operating parameters of thermal power units in the power system, the number and operating parameters of wind power units, the number and operating parameters of nuclear power units, the number and operating parameters of pumped storage units, the load data of the power system and wind power forecast data.
电力系统负荷数据用于确定某个季度每天的负荷曲线，再用统计方法估计每天负荷峰值出现的时间段和谷值出现的时间段，春季典型负荷曲线如图3所示，则核电满负荷运行的时间为10点到22点。The load data of the power system is used to determine the daily load curve of a certain season, and then use statistical methods to estimate the time period of the daily load peak value and the time period of the valley value. The typical load curve in spring is shown in Figure 3, and the nuclear power is operating at full load The time is from 10:00 to 22:00.
风电预测数据，原来求取风电出力预测误差的概率分布函数，以此表征风电出力不确定性，春季某天风电预测曲线如图4所示。For the wind power forecast data, the probability distribution function of the wind power output forecast error was originally obtained to represent the uncertainty of wind power output. The wind power forecast curve for a certain day in spring is shown in Figure 4.
2)根据获取电力系统中火电机组的台数和运行参数、风电机组的台数和运行参数、核电机组的台数和运行参数、抽水储能机组的台数和运行参数、电力系统的负荷数据和风电预测数据，建立优化的机组组合调度运行方法模型：2) According to the acquisition of the number and operating parameters of thermal power units in the power system, the number and operating parameters of wind power units, the number and operating parameters of nuclear power units, the number and operating parameters of pumped storage units, the load data of the power system and wind power forecast data , to establish an optimized unit combination scheduling operation method model:
模型的目标函数为：The objective function of the model is:
上式分别表示电网利益最大化和风电消纳最大化。The above formulas represent the maximization of grid benefits and the maximization of wind power consumption respectively.
模型的约束条件为：The constraints of the model are:
①功率平衡：①Power balance:
考虑核电与负荷配合，其在不同时间出力如下：Considering the cooperation between nuclear power and load, its output at different times is as follows:
②出力约束：②Output constraints:
风电出力约束包括式：Wind power output constraints include:
0≤Pw,j≤Wmax0≤Pw,j ≤Wmax
上式分别表示风电出力具有不确定性、计划有功出力必须小于风电场的装机容量、允许弃风，但不能超过风电预期平均值，弃风量用预测平均值与实际出力值之差表示。The above formulas respectively indicate that the wind power output is uncertain, the planned active output must be less than the installed capacity of the wind farm, wind curtailment is allowed, but cannot exceed the expected average value of wind power, and the amount of wind curtailment is expressed by the difference between the predicted average value and the actual output value.
抽水储能机组出力约束：Output constraint of pumped storage unit:
火电出力约束：Thermal power output constraints:
PH,min≤PH≤PH,maxPH,min ≤PH ≤PH,max
③爬坡约束：③Climbing constraints:
火电机组爬坡约束：Thermal power unit climbing constraints:
PH,down≤ΔPH≤PH,upPH,down ≤ΔPH ≤PH,up
抽水储能机组的爬坡约束即需要考虑机组水库是否越限的问题，在相邻时间点求得机组出力大小时，需要使用越限判断程序来检验出力结果是否可行，越限程序流程图如图2所示，步骤如下：The climbing constraint of the pumped storage unit needs to consider whether the reservoir of the unit exceeds the limit. When the output of the unit is obtained at adjacent time points, it is necessary to use the limit-breaking judgment procedure to check whether the output result is feasible. The flow chart of the limit-breaking procedure is as follows: As shown in Figure 2, the steps are as follows:
步骤1：从系统计算得到的一组最优解中，提取出抽水储能机组的出力数据，并按照时间顺序将其排列，第一个时间点得到的数据记为Pc,0，其后按次序记为Pc,1、Pc,2……Pc,T-1，；初始化水量Z和时间t＝0，进行步骤2；Step 1: Extract the output data of the pumped storage units from a group of optimal solutions calculated by the system, and arrange them in chronological order. The data obtained at the first time point is denoted as Pc,0 , and then Recorded in sequence as Pc,1 , Pc,2 ... Pc,T-1 ; initialize water volume Z and time t=0, proceed to step 2;
步骤2：判断Pc,t是否为正值，“是”则进行步骤3，否则进行步骤9；Step 2: Determine whether Pc, t is a positive value, if "yes", go to step 3, otherwise go to step 9;
步骤3：抽水机组出力为正值，认为机组处于发电状态，计算发电状态下水库流水量进行步骤4(当机组处于发电状态时，发电量之比等于水库流水量之比，Pr为抽水储能电站最大发电功率，Zmax为最大发电功率对应的最大流水量)；Step 3: The output of the pumping unit is positive, and the unit is considered to be in the power generation state, and the reservoir flow is calculated under the power generation state Proceed to step 4 (when the unit is in the power generation state, the ratio of power generation is equal to the ratio of the reservoir flow, Pr is the maximum power generation power of the pumped storage power station, and Zmax is the maximum flow rate corresponding to the maximum power generation);
步骤4：计算当前上水库水量Z＝Z-ΔZ，进行步骤5；Step 4: Calculate the current amount of water in the upper reservoir Z=Z-ΔZ, and proceed to Step 5;
步骤5：判断当前水库水量是否满足库容限值，Zmin≤Z≤Zmax，“是”则进行步骤6，“否”则进行步骤7；Step 5: Judging whether the current reservoir water volume meets the storage capacity limit, Zmin ≤ Z ≤ Zmax , if "Yes", proceed to Step 6, and "No", proceed to Step 7;
步骤6；累积时间量，t＝t+1，进行步骤8；Step 6; accumulative amount of time, t=t+1, go to step 8;
步骤7：输出“非最优解”，此时存在水库越限现象，跳出程序；Step 7: Output "non-optimal solution", at this time there is a phenomenon that the reservoir exceeds the limit, and jump out of the program;
步骤8：判断时间量是否达到最大，以此判断程序是否将最优解子集中全部数据都检验完毕，“否”则进行步骤2，“是”则输出“最优解”，并结束程序；Step 8: Determine whether the amount of time has reached the maximum, so as to determine whether the program has checked all the data in the optimal solution subset, if "No", proceed to Step 2, and if "Yes", output the "optimal solution" and end the program;
步骤9：判断Pc,t+1是否为0，“是”则进行步骤10；“否”则进行步骤11；Step 9: Judging whether Pc,t+1 is 0, if "Yes", proceed to Step 10; "No", proceed to Step 11;
步骤10：此时认为机组出力为0，处于停机状态，流水量为0，水位保持不变并进行步骤5；Step 10: At this time, it is considered that the output of the unit is 0, it is in a shutdown state, the flow rate is 0, and the water level remains unchanged, and proceed to step 5;
步骤11：此时认为机组出力为负，处于抽水状态。抽水状态下，认为机组始终保持最大功率，抽水量为最大流量，计算当前上水库水量Z＝Z+Zmax，进行步骤5；Step 11: At this point, it is considered that the output of the unit is negative and it is in the pumping state. In the state of pumping water, it is considered that the unit always maintains the maximum power, and the water pumping volume is the maximum flow rate. Calculate the current water volume of the upper reservoir Z=Z+Zmax , and proceed to step 5;
④备用：④ Spare:
5％和15％分别为负荷波动对备用需求系数和风电波动对备用需求系数。5% and 15% are the load fluctuation to backup demand coefficient and the wind power fluctuation to backup demand coefficient respectively.
优选的，采用粒子群算法求解最优的风-火-核-抽水储能联合发电机组调度运行方法，求解结果如图6所示，风电机组优化前和优化后的出力情况如图7所示，风电机组在调峰任务中的出力比优化前约多2.835％，一定程度上减少了弃风量。Preferably, the particle swarm optimization algorithm is used to solve the optimal wind-thermal-nuclear-pumped energy storage combined generating set scheduling operation method, the solution result is shown in Figure 6, and the output of the wind turbine before and after optimization is shown in Figure 7 , the output of wind turbines in the peak shaving task is about 2.835% more than that before optimization, which reduces the amount of abandoned wind to a certain extent.
| Application Number | Priority Date | Filing Date | Title |
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| CN201711159731.0ACN107679679A (en) | 2017-11-20 | 2017-11-20 | Cogeneration machine unit scheduling operation method |
| Application Number | Priority Date | Filing Date | Title |
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| CN201711159731.0ACN107679679A (en) | 2017-11-20 | 2017-11-20 | Cogeneration machine unit scheduling operation method |
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| CN107679679Atrue CN107679679A (en) | 2018-02-09 |
| Application Number | Title | Priority Date | Filing Date |
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| CN201711159731.0APendingCN107679679A (en) | 2017-11-20 | 2017-11-20 | Cogeneration machine unit scheduling operation method |
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| TA01 | Transfer of patent application right | Effective date of registration:20180320 Address after:Heping District, Siping City of Shenyang province Liaoning 110006 Street No. 39-7 Applicant after:Electric Power Research Institute of State Grid Liaoning Electric Power Co., Ltd. Applicant after:North China Electric Power University (Baoding) Applicant after:State Grid Corporation of China Address before:Heping District, Siping City of Shenyang province Liaoning 110006 Street No. 39-7 Applicant before:Electric Power Research Institute of State Grid Liaoning Electric Power Co., Ltd. | |
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