基于限流电抗器的统一潮流控制器故障渡越策略及其与保护的配合  

Fault ride through strategy of unified power flow controller based on current limiting reactor and its coordination with protection

作　　者：郑涛[1] 汤哲 张滋行 李厚源 王赟鹏 祁欢欢 ZHENG Tao;TANG Zhe;ZHANG Zihang;LI Houyuan;WANG Yunpeng;QI Huanhuan(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China;State Key Laboratory of Advanced Power Transmission Tech no logy,Global Energy In terconnection Research Institute Co.,Ltd.,Beijing 102200,China)

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]全球能源互联网研究院有限公司先进输电技术国家重点实验室,北京102200

出　　处：《电力自动化设备》2020年第2期8-13,20,共7页Electric Power Automation Equipment

基　　金：国家重点研发计划智能电网技术与装备重点专项(2016YFB0900600);国家电网公司科技项目(52094017000W)~~

摘　　要：详细分析了基于模块化多电平换流器(MMC)的统一潮流控制器(UPFC)接入线路发生故障时的UPFC本体响应特性,提出一种基于限流电抗器的UPFC故障渡越策略。通过限制经过直流母线的故障电流,可使得UPFC外部故障期间并联侧MMC不闭锁,从而实现故障渡越。在此基础上,研究并提出了UPFC故障渡越策略与线路距离保护的协调配合方案,可有效解决UPFC接入后对线路距离保护的不利影响。通过PSCAD/EMTDC进行了大量仿真试验,验证了所提策略和方案的有效性。The response characteristics of UPFC(Unified Power Flow Controller) based on MMC(Modular Multilevel Converter) in case of failure of UPFC access line are analyzed in detail,and an FRT(Fault Ride Through) strategy based on CLR(Current Limiting Reactor) is proposed,which can make MMC at the shunt side being unblocked during external fault of UPFC by limiting the fault current passing through the DC link bus. On this basis,a coordination scheme of the FRT strategy of UPFC with the line distance protection is provided,which can effectively eliminate the adverse effects on the line distance protection.Simulation experiments are carried out in PSCAD/EMTDC,and the results verify the effectiveness of the proposed FRT strategy and coordination scheme.

关 键 词：灵活交流输电 统一潮流控制器 故障渡越 限流电抗器 距离保护 继电保护 

分 类 号：TM77[电气工程—电力系统及自动化]