限流式统一潮流控制器的启停控制策略  

Start-stop Control Strategy for UPFC with Fault Current Limiting

作　　者：沈忱[1] 江道灼[1] 吕文韬[1] 王玉芬[1] 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027

出　　处：《电力系统自动化》2013年第22期101-105,121,共6页Automation of Electric Power Systems

基　　金：国家高技术研究发展计划(863计划)资助项目(2008AA05Z213)~~

摘　　要：限流式统一潮流控制器(UPFC)可以有效避免串联变换器因系统短路电流冲击而损毁。针对限流式UPFC已有功率控制策略的不足,建立了含限流式UPFC的系统模型,提出了基于线路电流控制的功率控制策略。分析了限流式UPFC的启停过程,给出了完整的启停控制方案。启动阶段接入限流电阻以防止直流电容充电电流过大而导致过电压和过电流损坏。停机时通过并联变换器释放直流电容的一部分能量从而降低放电电阻的设计要求。PSCAD/EMTDC软件的建模与仿真结果证明了基于线路电流控制的限流式UPFC功率控制策略具有良好的动态和稳态性能,同时也验证了启停控制方案的合理性和有效性。The unified power flow controller with fault current limiting （UPFC-FCL） can effectively protect series converter from being damaged by short circuit current. In view of the inadequacy of existing power control strategies for UPFC-FCL, a power system model with UPFC-FCL is developed, and a power control strategy based on line current control is proposed. The start-stop process of UPFC-FCL is analyzed, then a complete start-stop control scheme is proposed. In the start process, the charging rate of DC capacitor is limited by current-limiting resistance, which prevents overvoltage or overcurrent of the equipment. In the stop process, the design requirements of discharge resistance can he reduced as the energy of DC capacitance is partly released through the shunt converter. PSCAD/EMTDC simulation results demonstrate that the UPFC-FCL power control strategy based on line current control has good dynamic and steady performance, and the start-stop control scheme is rational and effective. This work is supported by National High Technology Research and Development Program of China （863 Program） （No. 2008AA05Z213）.

关 键 词：统一潮流控制器 短路 限流 控制策略 功率控制 启停控制 

分 类 号：TM76[电气工程—电力系统及自动化]