摘要
在仿真软件PSCAD/EMTDC中的CIGRE直流输电标准测试系统中加入直流线路自动再起动顺序控制,模拟直流线路不同位置及经过渡电阻接地故障,根据线路自动再起动控制过程中控制系统失灵时换流变压器网侧电压电流的变化规律,提出采用低电流保护作为直流线路的远后备保护,达到优化和完善直流线路后备保护的目的。仿真结果表明低电流保护动作可靠、逻辑简单、易于实现。
The DC line auto-restart function is added in rectifier control of CIGRE HVDC benchmark model in PS CAD/EMTDC. The variation rules of voltage and current of converter transformer at the network side is probed with PSCAD/EMTDC when the control process of DC line auto-restart fails. According to the features of the changes of voltage and current, low current protection is used as DC line back-up protection to optimize the DC line protection, The simulation results prove that low current protection is valid.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2006年第5期1-5,共5页
Journal of North China Electric Power University：Natural Science Edition
