| 引用本文: | 廖 峰,陈锦荣,区伟潮.配电网站域式快速线路保护方案及其实现[J].电力系统保护与控制,2023,51(18):137-146. |
| LIAO Feng,CHEN Jinrong,OU Weichao.Fast station-area protection of a distribution line and its implementation[J].Power System Protection and Control,2023,51(18):137-146 |
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| 摘要: |
| 为解决现有配电线路保护越级跳闸、动作时限长以及分布式电源(distributed generation, DG)并网后保护不适用等问题，提出了配电网站域式快速线路保护及其实现方案。首先，采用基于连接点路径搜索的拓扑模型解析方法，并构建基于单向邻接矩阵的拓扑描述模型，形成保护应用拓扑矩阵。然后，分析随机投退的多类型DG并网系统相间和接地短路时的故障特征，并提取故障定位有效信息，形成故障信息矩阵。综合保护应用拓扑和故障信息生成故障定位矩阵，提出故障定位判据。最后，设计开发保护成套装置，并利用已研制样机进行基于RTplus平台的试验。试验结果证明配电线路不同位置发生不同类型故障时保护出口时间不超过60 ms，目标终端接收到跳闸命令并控制相应断路器跳闸，保护速动性和选择性要求均能得到满足。 |
| 关键词: 配电网 站域式保护 快速线路保护 保护应用拓扑 故障信息矩阵 |
| DOI：10.19783/j.cnki.pspc.230276 |
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| 基金项目:国家高技术研究发展计划(863计划)重点项目资助(2012AA050213)；南方电网公司科技项目资助(030600KK 52200020(GDKJXM20200559)) |
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| Fast station-area protection of a distribution line and its implementation |
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LIAO Feng, CHEN Jinrong, OU Weichao
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Foshan Power Supply Bureau, Guangdong Power Grid CorporationFoshan 528000, China
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| Abstract: |
| To solve the problems of overstep tripping, long action time and inapplicability after the integration of distributed generators (DGs) of the existing distribution line protection, a fast station-area protection of a distribution line and its implementation scheme are proposed. First, a topological model analysis method based on connection point path search is adopted, and a topological description model based on a one-way adjacency matrix is constructed to form a protection application topology matrix. Then, the characteristics of phase to phase faults and phase to ground faults of a multi-type DGs grid-connected system with random switching are analyzed, and the effective information of fault location are extracted to form the fault information matrix. The fault location matrix is generated by synthesizing topology and fault information and the fault location criteria are put forward. Finally, the protection device is designed and a test is carried out based on the RTplus platform. The results show that the protection action time does not exceed 60 ms while different types of faults occur at different positions of the distribution line and the tripping command is received by the target terminal unit to make the corresponding circuit breaker trip. Both the speed and selectivity requirements of distribution line protection can be met. |
| Key words: distribution network station-area protection fast line protection protection application topology fault information matrix |
