母线保护TA饱和快速闭锁与再开放判据研究  

Research on TA Saturation Fast Blocking and Reopening Criterion for Bus Protection

作　　者：郑浩 林湘宁[2] 金能[2] 邢家维 陈敦辉[2] 井嵘 ZHENG Hao;LIN Xiangning;JIN Neng;XING Jiawei;CHEN Dunhui;JING Rong(College of Electrical Engineering&New Energy,China Three Gorges University,Yichang 443002,Hubei Province,China;China State Key Laboratory of Electromagnetic Engineering(Huazhong University of Science and Technology),Wuhan 430074,Hubei Province,China;State Grid Yantai Power Supply Company,Yantai 264001,Shandong Province,China)

机构地区：[1]三峡大学电气与新能源学院,湖北省宜昌市443002 [2]强电磁工程与新技术国家重点实验室(华中科技大学),湖北省武汉市430074 [3]国家电网烟台供电公司,山东省烟台市264001

出　　处：《中国电机工程学报》2019年第19期5805-5816,共12页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51477090);国家电网公司科技项目(SGTYHT/16-JS-198)~~

摘　　要：为解决母线区外近端故障导致的TA极端快速饱和进而引起母线保护误动作的问题,该文首次引入工频变化量距离保护原理实现一种适用于母线差动保护的TA饱和闭锁与再开放方案。提出一种母线保护再开放判据,以实现区外、区内故障转换时母线保护的迅速开放。理论分析和仿真结果表明,所提闭锁判据能明确区分内部故障和区外TA饱和,即使出现TA超快速深度饱和,该闭锁判据能够快速可靠闭锁母线保护;在转换性故障时,保护再开放判据也能迅速解除闭锁信号,允许母线保护快速响应转换性故障。Bus external fault where is close to the bus, often leads to the extreme fast saturation of TA. That may cause the bus mal-operation. In order to solve this problem, a new TA saturation blocking and reopening scheme, on basis of superimposed distance protection(SDP) was proposed. And a new criterion for bus protection reopening was proposed in the paper. Theoretical analysis and simulation results show that the proposed blocking criterion can clearly distinguish internal faults, external faults and TA saturation from each other. Even the TA is super-fast deep saturated, the locking criterion can rapidly and reliably block bus protection. When an evolved fault happens, the reopening criterion can rapidly relieve blocking signal so that the fault can be quickly removed.

关 键 词：TA饱和 母线保护 工频变化量距离保护 小矢量算法 发展性故障 

分 类 号：TM772[电气工程—电力系统及自动化]