摘要
楚穗直流联网、全压运行条件下,相继发生极1两次线路保护动作,极2一次线路保护的事件,导致楚穗直流双极闭锁。为探明楚穗直流双极相继闭锁的原因,从直流线路故障纵差保护原理、行波保护原理、极控线路故障重启监视功能入手,结合楚穗直流EMTDC仿真模型,从电磁耦合与双极接地故障两个维度分析并掌握双极相继闭锁的原因。通过对故障重启监视功能的深入分析,进一步挖掘出监视功能的逻辑缺陷,提出了避免直流不必要闭锁的故障重启逻辑优化建议。
At AC/DC normal connected operation mode, there are two transmission line fault protection events on pole 1 and one event on pole 2 sequentially, which resulted to bipolar block. The protection operation rules on 87DCLL, WFPDL and DC line fault recovery monitoring function are investigated in order to reveal the reason of block. Electromagnetic coupling and bipolar grounding faults are analyzed with EMTDC simulation. Logic flaws in fault recovery monitoring function are revealed. Finally, suggestions are proposed to avoid unnecessary HVDC system block under fault condition.
出处
《中国电力》
CSCD
北大核心
2015年第7期39-43,共5页
Electric Power
