CN102916394A - On-site transformer protection system used for intelligent transformer substation - Google Patents
On-site transformer protection system used for intelligent transformer substationDownload PDFInfo
- Publication number
- CN102916394A CN102916394ACN2011104407051ACN201110440705ACN102916394ACN 102916394 ACN102916394 ACN 102916394ACN 2011104407051 ACN2011104407051 ACN 2011104407051ACN 201110440705 ACN201110440705 ACN 201110440705ACN 102916394 ACN102916394 ACN 102916394A
- Authority
- CN
- China
- Prior art keywords
- protection
- transformer
- transformer protection
- situ
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明属于电力工程领域的继电保护自动化领域，涉及智能变电站的就地化变压器保护的设计方法。 The invention belongs to the field of relay protection automation in the field of electric power engineering, and relates to a design method for in-situ transformer protection of intelligent substations. the
背景技术Background technique
在传统变电站中，传统变压器保护通过长电缆将变压器各侧模拟量(电流和电压量)和开关量引入到变压器保护装置中，由变压器保护装置完成模拟量到数字量的转换，并进行逻辑判别。 In traditional substations, traditional transformer protection introduces the analog quantities (current and voltage) and switching quantities on each side of the transformer into the transformer protection device through long cables, and the transformer protection device completes the conversion from analog to digital and performs logical discrimination. . the
这种做法带来的问题有： The problems with this approach are:
1、占地面积大。需要建设主控室放置变压器保护装置，占用了大量的土地，在土地资源日益紧张的情况下，占用的投资也越来越大。 1. It occupies a large area. It is necessary to build a main control room to place transformer protection devices, which takes up a lot of land. In the case of increasingly tight land resources, the occupied investment is also increasing. the
2、保护可靠性受二次电缆的影响。常规变电站中，由于二次电缆容易遭受电磁干扰和一次设备传输过电压引起二次设备运行异常。除此之外，二次回路的多点接地和耦合电容的干扰也可能导致继电保护装置误动作。据国家电力调度中心的统计，因二次电缆问题引起的保护不正确动作占故障总数的4成，二次电缆实际上构成了变电站安全运行的主要隐患。 2. The protection reliability is affected by the secondary cable. In conventional substations, secondary cables are susceptible to electromagnetic interference and primary equipment transmits overvoltage, causing abnormal operation of secondary equipment. In addition, the multi-point grounding of the secondary circuit and the interference of coupling capacitance may also cause the relay protection device to malfunction. According to the statistics of the National Electric Power Dispatching Center, incorrect protection actions caused by secondary cable problems account for 40% of the total number of faults, and secondary cables actually constitute a major hidden danger for the safe operation of substations. the
发明内容Contents of the invention
本发明要解决的问题是实现变压器保护的就地化设计，满足智能变电站的发展要求。 The problem to be solved by the invention is to realize the in-situ design of transformer protection and meet the development requirements of intelligent substations. the
为完成上述任务，本发明的技术方案是：用于智能变电站的就地化变压器保护系统，变压器各侧均对应设有逻辑单元，各逻辑单元分别对应放置在各侧的开关柜中，各逻辑单元之间通过光纤互相连接；各逻辑单元分别用于完成对应侧的一次数据采集、数据交互和后备保护逻辑判别的功能。 In order to accomplish the above tasks, the technical solution of the present invention is: an in-situ transformer protection system for smart substations, each side of the transformer is correspondingly equipped with a logic unit, and each logic unit is respectively placed in the switch cabinet on each side, each logic The units are connected to each other through optical fibers; each logic unit is used to complete the functions of primary data collection, data interaction and backup protection logic judgment on the corresponding side. the
所述变压器各侧包括高压侧，中压侧和低压侧。 Each side of the transformer includes a high voltage side, a medium voltage side and a low voltage side. the
本发明属于电力工程领域的智能变电站继电保护自动化领域，涉及智能变电站中就地化的变压器保护设计方法。在智能变电站中，取消主控室，保护就地化放置是发展的潮流。对于变压器保护而言，由于需要采集变压器各侧的模拟量及开关量，传统上的变压器保护将各侧的模拟量及开关量通过长电缆引入到集中放置的变压器保护装置中。这种实现方法不能应用于智能变电站中。因此，必须针对智能变电站的特点和要求，提出相应的变压器保护设计方案。 The invention belongs to the field of relay protection automation of intelligent substations in the field of electric power engineering, and relates to an in-situ transformer protection design method in intelligent substations. In smart substations, it is the trend of development to cancel the main control room and place protection in situ. For transformer protection, due to the need to collect the analog and switching values of each side of the transformer, the traditional transformer protection introduces the analog and switching values of each side to the centralized transformer protection device through long cables. This implementation method cannot be applied to smart substations. Therefore, according to the characteristics and requirements of the smart substation, a corresponding transformer protection design scheme must be proposed. the
本发明利用通讯网络技术，提出了对应的网络数据传输方案，巧妙的解决了就地化安装的变压器保护实现方案的关键技术问题。并通过冗余设计，在识别出通讯网络故障后，发出告警信息的同时，能通过网络切换技术自愈，维持保护的正常运行，解决了通讯网络故障影响变压器保护可靠运行的问题。利用网络通讯技术，实现了变压器保护的就地化放置，并通过软件算法巧妙地解决了数据同步问题，不依赖外部的同步脉冲。同时，通过冗余技术，解决了通讯链路故障导致系统被闭锁的问题，有效地提高了差动保护的可靠性，应用价值极高。 The invention utilizes the communication network technology to propose a corresponding network data transmission scheme, and cleverly solves the key technical problem of the transformer protection implementation scheme installed locally. And through the redundant design, after identifying the communication network failure, it can issue an alarm message, and at the same time, it can self-heal through the network switching technology to maintain the normal operation of the protection, which solves the problem that the communication network failure affects the reliable operation of the transformer protection. Using network communication technology, the localized placement of transformer protection is realized, and the problem of data synchronization is skillfully solved through software algorithms, without relying on external synchronization pulses. At the same time, through the redundancy technology, the problem of the system being blocked due to the failure of the communication link is solved, the reliability of the differential protection is effectively improved, and the application value is extremely high. the
附图说明Description of drawings
图1是就地化变压器保护逻辑单元配置图； Figure 1 is a configuration diagram of the in-situ transformer protection logic unit;
图2是就地化变压器保护逻辑单元光纤通道连接图； Figure 2 is a fiber channel connection diagram of the in-situ transformer protection logic unit;
图3是同步调整计算示意图。 Fig. 3 is a schematic diagram of synchronous adjustment calculation. the
具体实施方式Detailed ways
下面结合附图对本发明做进一步详细的说明。 The present invention will be described in further detail below in conjunction with the accompanying drawings. the
随着IEC-61850标准颁布，网络通信技术的发展，智能变电站的建设越来越快。在智能变电站中，采集单元下放是发展的趋势。采集单元下放后，由于装置上电时刻不同、采样晶振偏差以及数据发送、接收的传输时间差，必然造成采样时刻的差异。为保证差动保护计算的正确性，必须保证所计算的各端电气量的采样数据同步。为了实现各侧的采样数据同步，可采用的方法有： With the promulgation of the IEC-61850 standard and the development of network communication technology, the construction of smart substations is getting faster and faster. In smart substations, decentralization of acquisition units is a development trend. After the acquisition unit is distributed, due to the different power-on time of the device, the deviation of the sampling crystal oscillator, and the transmission time difference between data sending and receiving, the difference in sampling time will inevitably result. In order to ensure the correctness of the differential protection calculation, it is necessary to ensure the synchronization of the sampling data of the calculated electrical quantities at each end. In order to realize the synchronization of sampling data on each side, the methods that can be used are:
1、各个装置接入外部对时信号，如GPS脉冲或B码，装置以外部对时信号为基准，将 采样数据打上时标，实现各个装置的数据同步，满足变压器保护的要求。 1. Each device is connected to an external time synchronization signal, such as GPS pulse or B code, and the device uses the external time synchronization signal as a reference to mark the sampling data with a time stamp to realize data synchronization of each device and meet the requirements of transformer protection. the
2、各个装置不接入外部对时信号，采用特定软件算法，实现各个装置的数据同步，满足变压器保护的要求。 2. Each device is not connected to an external timing signal, and a specific software algorithm is used to realize data synchronization of each device and meet the requirements of transformer protection. the
软件算法采用目前普遍采用的等腰梯形算法。 The software algorithm adopts the isosceles trapezoidal algorithm which is widely used at present. the
等腰梯形算法原理： Isosceles trapezoidal algorithm principle:
基于数字通道的同步调整计算全都建立在收发数据延时相等的“等腰梯形算法”的数学模型上。如图3所示： The calculation of synchronous adjustment based on digital channels is all based on the mathematical model of "isosceles trapezoidal algorithm" with equal delay of sending and receiving data. As shown in Figure 3:
在该图等腰梯形中，若从侧已知梯形的上底及下底的长度，运用几何知识容易求得主侧数据帧发送点Tm1在从侧所对应的同时刻点Tm1′时刻。也就是说，从侧通过简单计算就可知道对侧数据帧发送时间与本侧时标的关系。 In the isosceles trapezoid in the figure, if the length of the upper and lower bases of the trapezoid is known from the slave side, it is easy to obtain the time point Tm1 ′ corresponding to the data frame transmission point Tm1 of the master side on the slave side by using geometric knowledge. That is to say, the slave side can know the relationship between the sending time of the data frame on the opposite side and the time stamp on the local side through simple calculation.
具体处理过程如下：每侧保护装置需记忆以下内容：上次发送数据的时刻与最近的接收时刻的间隔时间Δt2＝t2-Tm0，Δt1＝t1-Tn2，并将Tn0、Δt2利用数字通道传递过来，发送数据间隔为固定时间，设为T(本装置每周波采样24点，每个采样周期向对侧发送一帧数据)，则在从侧的t1时刻可求出对侧数据发送时刻 The specific processing process is as follows: the protection device on each side needs to memorize the following content: the time interval between the time of last sending data and the latest receiving time Δt2 =t2 -Tm0 , Δt1 =t1 -Tn2 , and set Tn0 , Δt2 is transmitted through the digital channel, and the interval of sending data is a fixed time, which is set to T (the device samples 24 points per cycle, and sends one frame of data to the opposite side in each sampling cycle), then at the timet1 of the slave side, it can be Calculate the sending time of the opposite side data
Tm1′＝[(Tn2-Tn0+Δt1)+(T-Δt2)]/2 (1) Tm1 '=[(Tn2 -Tn0 +Δt1 )+(T-Δt2 )]/2 (1)
通道传输延时td的计算公式如下： The formula for calculating the channel transmission delay td is as follows:
td＝[(Tn2-Tn0+Δt1)-(T-Δt2)]/2 (2) td =[(Tn2 -Tn0 +Δt1 )-(T-Δt2 )]/2 (2)
从侧与主侧采样时刻偏差Δts Sampling time deviation Δts between slave side and master side
a＝(Tn2-Tm1′)/T取余数 (3) a=(Tn2 -Tm1 ′)/T take the remainder (3)
若a＜T/2，则Δts取a；则从端滞后主端|Δts|；若a＞T/2，Δts取-|T-a|，则从端超前主端|Δts|；根据从侧与主侧的采样时刻偏差|Δts|，从侧作出相应的调整，可达到同步采样的目的。 If a<T/2, then Δts takes a; then the slave end lags behind the master end |Δts|; if a>T/2, Δts takes -|T-a|, then the slave end leads the master end |Δts|; according to the slave side and the master end |Δts| The sampling time deviation |Δts| on the master side can be adjusted accordingly from the slave side to achieve the purpose of synchronous sampling. the
两侧采样序号差ΔNum的计算公式如下： The calculation formula for the difference ΔNum of sampling numbers on both sides is as follows:
ΔNum＝对侧采样序号-[本侧采样序号-取整((td-Δt1)/T+0.5)] (4) ΔNum=Sampling number of opposite side-[Sampling number of this side-rounding ((td -Δt1 )/T+0.5)] (4)
如图1所示的用于智能变电站的就地化变压器保护系统，变压器各侧均对应设有逻辑单元，各逻辑单元分别对应放置在各侧的开关柜中，各逻辑单元之间通过光纤互相连接；各逻辑单元分别用于完成对应侧的一次数据采集、数据交互和后备保护逻辑判别的功能。以三圈变压器为例子，变压器保护的组成单元有：高压侧逻辑单元，中压侧逻辑单元和低压侧逻辑单元。各个逻辑单元分别完成对应侧的一次数据采集、数据交互、后备保护逻辑判别的功能。差动保护由其中一个逻辑单元完成。保护高压侧，中压侧，低压侧的顺序自适应设定数据同步的基准侧。在通信链路均正常的情况下，以高压侧为基准进行数据同步。在基准侧和其他某侧通信链路故障的情况下，短时由各个逻辑单元的守时功能保证数据的同步，之后自动转换基准侧，系统重新进行数据同步。持续发通道告警信号，提醒运行人员择机选择停电检修。 As shown in Figure 1, the in-situ transformer protection system for smart substations has logic units corresponding to each side of the transformer, and each logic unit is placed in the switchgear on each side, and the logic units communicate with each other through optical fibers. Connection; each logic unit is used to complete the functions of one-time data collection, data interaction and backup protection logic judgment on the corresponding side. Taking the three-turn transformer as an example, the components of transformer protection are: high-voltage side logic unit, medium-voltage side logic unit and low-voltage side logic unit. Each logic unit completes the functions of one-time data collection, data interaction, and backup protection logic judgment on the corresponding side. Differential protection is done by one of the logic units. Protect the high-voltage side, the medium-voltage side, and the low-voltage side in order to adaptively set the reference side for data synchronization. When the communication links are all normal, data synchronization is performed based on the high-voltage side. In the event of a communication link failure between the reference side and another side, the timekeeping function of each logic unit ensures data synchronization for a short time, and then the reference side is automatically switched, and the system re-synchronizes data. Continuously send channel alarm signals to remind operators to choose an opportunity to choose a power outage for maintenance. the
高压侧逻辑单元完成高压侧数据采集，高压侧断路器跳闸，差动保护，高压侧后备保护等功能。 The high-voltage side logic unit completes the functions of high-voltage side data collection, high-voltage side circuit breaker tripping, differential protection, and high-voltage side backup protection. the
中压侧逻辑单元完成中压侧数据采集，中压侧断路器跳闸，中压侧后备保护等功能。 The medium-voltage side logic unit completes the functions of medium-voltage side data collection, medium-voltage side circuit breaker tripping, and medium-voltage side backup protection. the
低压侧保护装置完成低压侧数据采集，低压侧断路器跳闸，低压侧后备保护等功能。 The low-voltage side protection device completes low-voltage side data collection, low-voltage side circuit breaker tripping, low-voltage side backup protection and other functions. the
各个逻辑单元通过光纤直接两两连接。 Each logical unit is directly connected two by two through optical fibers. the
变压器差动保护由于计算各侧电流的向量和，因此需要各侧电流实现采样同步。本发明专利的变压器保护装置，不接入外部对时信号，采用梯形软件算法，实现各个装置的数据同步，满足变压器差动保护的要求。 Since the transformer differential protection calculates the vector sum of the currents on each side, it is necessary to realize the sampling synchronization of the currents on each side. The transformer protection device patented by the present invention does not access external timing signals, and adopts a trapezoidal software algorithm to realize data synchronization of each device and meet the requirements of transformer differential protection. the
系统按照高压侧，中压侧和低压侧的顺序设置基准侧。在通信链路均正常的情况下，以高压侧为基准进行数据同步。在基准侧和其他侧某一条通信链路故障的情况下，系统依靠各个逻辑单元的时钟芯片的守时功能，维持短时的差动保护数据计算，并发通道异常告警信号，同时自动转换其他侧为基准侧，系统重新进行数据同步。 The system sets the reference side in the order of high pressure side, medium pressure side and low pressure side. When the communication links are all normal, data synchronization is performed based on the high-voltage side. In the case of failure of a communication link between the reference side and other sides, the system relies on the timekeeping function of the clock chips of each logic unit to maintain short-term differential protection data calculations, send channel abnormal alarm signals, and automatically switch other sides As the reference side, the system re-synchronizes the data. the
对于变压器各侧后备保护(包括高压侧后备保护，中压侧后备保护和低压侧后备保护)，模拟量取本侧电流和电压，不存在各侧数据同步问题。因此，本方案的各侧后备保护始终 投入，不受通信链路的影响。 For the backup protection of each side of the transformer (including the backup protection of the high voltage side, the backup protection of the medium voltage side and the backup protection of the low voltage side), the analog quantity takes the current and voltage of the side, and there is no problem of data synchronization on each side. Therefore, the backup protection on each side of this scheme is always on and is not affected by the communication link. the
变压器各侧逻辑单元就地放置于变压器各侧开关柜中，各侧逻辑单元均通过光纤进行通讯。 The logic units on each side of the transformer are placed in the switch cabinets on each side of the transformer, and the logic units on each side communicate through optical fibers. the
高压侧逻辑单元完成高压侧数据采集，高压侧断路器跳闸，差动保护，高压侧后备保护等功能。中压侧逻辑单元完成中压侧数据采集，中压侧断路器跳闸，中压侧后备保护等功能。低压侧逻辑单元完成低压侧数据采集，低压侧断路器跳闸，低压侧后备保护等功能。 The high-voltage side logic unit completes the functions of high-voltage side data collection, high-voltage side circuit breaker tripping, differential protection, and high-voltage side backup protection. The medium-voltage side logic unit completes the functions of medium-voltage side data collection, medium-voltage side circuit breaker tripping, and medium-voltage side backup protection. The low-voltage side logic unit completes low-voltage side data collection, low-voltage side circuit breaker tripping, low-voltage side backup protection and other functions. the
对于各侧后备保护，各侧逻辑单元独立判别，不依赖数据同步。 For the backup protection of each side, the logic unit of each side judges independently, without relying on data synchronization. the
对于差动保护，差动电流的计算需要进行数据同步。 For differential protection, the calculation of differential current requires data synchronization. the
本设计方案除了能实现各逻辑单元数据同步之外，还能实现同步数据冗余，保证任意一个通讯链路损坏，系统不退出差动保护。实现的步骤为： In addition to realizing the data synchronization of each logic unit, this design scheme can also realize synchronization data redundancy to ensure that any communication link is damaged and the system does not exit the differential protection. The steps to achieve are:
(1)设置基准侧的顺序为H侧(即高压侧)，M侧(即中压侧)，L侧(即低压侧)。 (1) The order of setting the reference side is H side (that is, high pressure side), M side (that is, medium pressure side), and L side (that is, low pressure side). the
(2)系统检测H侧和其他两侧(M侧及L侧)的检测通讯链路是否正常时，系统自动以H侧为同步基准，M侧及L侧调整采样数据，实现系统数据同步。 (2) When the system detects whether the communication link between the H side and the other two sides (M side and L side) is normal, the system automatically takes the H side as the synchronization reference, and the M side and the L side adjust the sampling data to realize system data synchronization. the
(3)系统检测到H侧与其他侧的任意一路通讯链路异常时，则按顺序检测M侧是否和其他两侧(H侧及L侧)的通讯链路是否正常，如果正常，则系统以M侧为基准，实现系统数据同步。 (3) When the system detects that any communication link between the H side and other sides is abnormal, it will check in order whether the communication links between the M side and the other two sides (H side and L side) are normal. If normal, the system will Based on the M side, system data synchronization is realized. the
(3)系统检测到H侧和M侧均与其他侧通讯链路异常，则系统以L侧为基准，实现系统数据同步。 (3) When the system detects that both the H side and the M side are abnormal in the communication links with other sides, the system uses the L side as a reference to realize system data synchronization. the
(4)系统检测到H侧、M侧和L侧均存在通讯链路异常的情况，表示系统至少有两路通讯链路异常，则闭锁差动保护。 (4) The system detects that there are abnormal communication links on the H side, M side and L side, indicating that at least two communication links in the system are abnormal, and then block the differential protection. the
传统上的变压器保护将各侧的模拟量及开关量通过长电缆引入到集中放置的变压器保护装置中。这种实现方式不但因需要建设主控室放置保护装置，占用大量土地，而且二次长电缆也威胁到保护的正常可靠运行。本发明专利顺应智能变电站的发展需要，实现了变压器的就地化，并巧妙地解决了差动保护的数据同步问题和可靠性问题，具有发明创造性。 In traditional transformer protection, the analog and switching values of each side are introduced into the centralized transformer protection device through long cables. This implementation not only takes up a lot of land because of the need to build the main control room to place the protection device, but also the secondary long cable threatens the normal and reliable operation of the protection. The invention patent conforms to the development needs of intelligent substations, realizes the localization of transformers, and skillfully solves the data synchronization and reliability problems of differential protection, and has inventiveness. the
以上实施例仅用以说明而非限制本发明的技术方法，尽管参照上述实施例对本发明进行了详细说明，本领域的普通技术人员应当理解：对本发明进行修改或者等同替换，而不脱离本发明的精神和范围的任何修改或局部替换，均应涵盖在本发明的权利要求范围当中。 The above embodiments are only used to illustrate and not limit the technical method of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention is modified or equivalently replaced without departing from the present invention Any modification or partial replacement within the spirit and scope of the present invention shall fall within the scope of the claims of the present invention. the
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110440705.1ACN102916394B (en) | 2011-12-24 | 2011-12-24 | On-site transformer protection system used for intelligent transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110440705.1ACN102916394B (en) | 2011-12-24 | 2011-12-24 | On-site transformer protection system used for intelligent transformer substation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102916394Atrue CN102916394A (en) | 2013-02-06 |
| CN102916394B CN102916394B (en) | 2015-07-15 |
Family
ID=47614676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110440705.1AExpired - Fee RelatedCN102916394B (en) | 2011-12-24 | 2011-12-24 | On-site transformer protection system used for intelligent transformer substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102916394B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104393567A (en)* | 2014-11-20 | 2015-03-04 | 许继集团有限公司 | Differential protection method for distributed transformer |
| CN104538933A (en)* | 2015-01-14 | 2015-04-22 | 南京南瑞继保电气有限公司 | Motor differential protection system and motor differential protection method |
| CN105301989A (en)* | 2014-06-19 | 2016-02-03 | 国网山西省电力公司电力科学研究院 | Self compensation type pilot protection exchange synchronization controller based on mobile communication |
| CN105896470A (en)* | 2016-06-03 | 2016-08-24 | 南京国电南自电网自动化有限公司 | Double loop network-based protection device free of main in-situ transformer and protection method |
| CN109768533A (en)* | 2018-12-28 | 2019-05-17 | 长园深瑞继保自动化有限公司 | The method of the more handset synchronization actions of site element protection looped network |
| CN110505259A (en)* | 2018-05-17 | 2019-11-26 | 许昌许继软件技术有限公司 | Data processing method and device for smart substation |
| CN111564821A (en)* | 2020-04-17 | 2020-08-21 | 许昌许继软件技术有限公司 | Automatic configuration method of on-site management unit |
| CN112993949A (en)* | 2021-02-26 | 2021-06-18 | 许继集团有限公司 | Synchronization method and device for power transmission line longitudinal differential protection sampling |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050096772A1 (en)* | 2003-10-31 | 2005-05-05 | Cox David N. | Transformer performance prediction |
| CN102025126A (en)* | 2011-01-19 | 2011-04-20 | 广东省电力设计研究院 | Relay protection method of transformer as well as system thereof |
- 2011
- 2011-12-24CNCN201110440705.1Apatent/CN102916394B/ennot_activeExpired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050096772A1 (en)* | 2003-10-31 | 2005-05-05 | Cox David N. | Transformer performance prediction |
| CN102025126A (en)* | 2011-01-19 | 2011-04-20 | 广东省电力设计研究院 | Relay protection method of transformer as well as system thereof |
Non-Patent Citations (1)
| Title |
|---|
| 刘有为等: "高压设备智能化方案及技术特征", 《电网技术》, vol. 34, no. 7, 31 July 2010 (2010-07-31), pages 1 - 4* |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301989A (en)* | 2014-06-19 | 2016-02-03 | 国网山西省电力公司电力科学研究院 | Self compensation type pilot protection exchange synchronization controller based on mobile communication |
| CN105301989B (en)* | 2014-06-19 | 2018-03-02 | 国网山西省电力公司电力科学研究院 | Self-compensating formula pilot protection based on mobile communication exchanges isochronous controller |
| CN104393567A (en)* | 2014-11-20 | 2015-03-04 | 许继集团有限公司 | Differential protection method for distributed transformer |
| CN104393567B (en)* | 2014-11-20 | 2017-08-29 | 许继集团有限公司 | A kind of distribution transformer differential protecting method |
| CN104538933A (en)* | 2015-01-14 | 2015-04-22 | 南京南瑞继保电气有限公司 | Motor differential protection system and motor differential protection method |
| CN104538933B (en)* | 2015-01-14 | 2018-03-13 | 南京南瑞继保电气有限公司 | A kind of motor differential protective system and method |
| CN105896470A (en)* | 2016-06-03 | 2016-08-24 | 南京国电南自电网自动化有限公司 | Double loop network-based protection device free of main in-situ transformer and protection method |
| CN110505259A (en)* | 2018-05-17 | 2019-11-26 | 许昌许继软件技术有限公司 | Data processing method and device for smart substation |
| CN109768533A (en)* | 2018-12-28 | 2019-05-17 | 长园深瑞继保自动化有限公司 | The method of the more handset synchronization actions of site element protection looped network |
| CN111564821A (en)* | 2020-04-17 | 2020-08-21 | 许昌许继软件技术有限公司 | Automatic configuration method of on-site management unit |
| CN112993949A (en)* | 2021-02-26 | 2021-06-18 | 许继集团有限公司 | Synchronization method and device for power transmission line longitudinal differential protection sampling |
| CN112993949B (en)* | 2021-02-26 | 2023-11-14 | 许继集团有限公司 | Synchronization method and device for longitudinal differential protection sampling of power transmission line |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102916394B (en) | 2015-07-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102916394B (en) | On-site transformer protection system used for intelligent transformer substation | |
| CN202076850U (en) | Merging unit and intelligent terminal integrated device | |
| CN104332960B (en) | A kind of intelligent arc light protecting system | |
| CN104967220A (en) | A substation monitoring system | |
| CN104037945A (en) | Distribution network automation system | |
| CN102946089B (en) | Power system relay protection system based on wireless transmission | |
| CN203691057U (en) | Arc online monitoring and protecting system | |
| CN204758748U (en) | Cubical switchboard intelligent integrated monitoring devices | |
| CN103117537A (en) | Power distribution network area protection method and system | |
| CN103683491A (en) | Multi-power accessed substation anti-islanding system | |
| CN106532683A (en) | Self-healing method of 110kV transformer station hand-in-hand power supply | |
| CN104993590B (en) | Protective relaying device secondary circuit self-monitoring method based on CID models | |
| CN114726097A (en) | Two-core mode low-voltage intelligent circuit breaker device | |
| CN103855810B (en) | A kind of stable system of the spontaneous recovery for 110 kv substations | |
| CN102983627B (en) | Transition method of intellectualized monitoring system modification process of conventional transformer substation | |
| CN109103859B (en) | Distribution network differential protection measurement and control device supporting 4G communication | |
| CN105932776A (en) | A Substation Secondary System Based on Main Subunit | |
| CN106451773B (en) | The automatic system of intelligent transformer station process layer devices implementation method of function decoupling | |
| CN205941794U (en) | Adjustment device of direct current system generating line voltage -to -ground | |
| CN203840058U (en) | Substation secondary equipment monitoring system | |
| CN106100132A (en) | The intelligent station combining unit control method of a kind of faulty action preventing and device | |
| CN206977029U (en) | A kind of differential protection of any phase shifting angle phase-shifting transformer of plug-in Multiple coil | |
| CN206099529U (en) | A synchronous monitoring device for secondary power supply system of power substation | |
| CN105226617A (en) | A kind of 360 degree of Omnibearing circular net electric arc light protection methods | |
| CN106374443B (en) | A kind of stratification guard method based on EPON |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right | Owner name:XUJI ELECTRIC CO., LTD. Free format text:FORMER OWNER: XUJI GROUP CO., LTD. Effective date:20131129 | |
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right | Effective date of registration:20131129 Address after:No. 1298 Xuchang City, Henan province 461000 XJ Avenue Applicant after:Xuji Electric Co., Ltd. Applicant after:Xuchang Xuji Software Technology Co., Ltd. Applicant after:State Grid Corporation of China Address before:No. 1298 Xuchang City, Henan province 461000 XJ Avenue Applicant before:Xuji Group Co., Ltd. Applicant before:Xuji Electric Co., Ltd. Applicant before:Xuchang Xuji Software Technology Co., Ltd. Applicant before:State Grid Corporation of China | |
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee | Granted publication date:20150715 Termination date:20201224 |