电网短路故障时并联型电力有源滤波器的过流保护  

RESEARCH ON THE OVERCURRENT PROTECTION CIRCUIT OF SHUNT APF

作　　者：陈玮[1] 王彤[1] 曾继伦[1] 

机构地区：[1]国家电力公司电力自动化研究院,江苏省南京市210003

出　　处：《电力系统自动化》2002年第9期59-62,共4页Automation of Electric Power Systems

摘　　要：对并联型电力有源滤波器 ( APF)在电力系统发生各种短路故障时的行为进行了分析 ,得出了在系统发生故障期间 APF会发生过流现象的结论。在此基础上提出了一种新颖的过流保护方案 :逐周限流保护方案。这种保护方法的优点在于 ,当 APF发生过流期间 ,通过切脉冲将 APF电流限制在允许范围内 ,并使 APF在其能力范围内继续起到补偿的作用。For short- circuit faults occurring in power system s,the behavior of shunt active power filter APF is analyzed. It is concluded that the overcurrent phenomena will happen during the fault period.Based on this analysis,a novel overcurrent protection schem e,cycle- by- cycle overcurrent limiting protection schem e,is proposed.The advantages of this schem e are as follows:the current of shunt APF will be limited within the permitted range during the fault period by IGBT driving pulses cutting the operation;And the shunt APF will be continually effective in com pensation within its ability.The simulation and experim ent tests prove the effectiveness and practicability of this schem e.

关 键 词：电网 短路故障 并联型电力有源滤波器 过流保护 电力系统 

分 类 号：TM761[电气工程—电力系统及自动化]