针对2014年1月22日普洱换流站进行极Ⅱ线路中点的接地故障实验时发生的双阀组跳闸事件,详细分析了保护动作的情况,指出所提出的直流保护方法正确和有效;并根据保护的范围分析了可能发生故障的区域和原因,对故障区域内的设备进行测试,找出了发生故障的避雷器,表明直流线路故障保护控制协调策略相关分析的正确性,为以后类似问题的分析提供有益参考.%Since the bivalve group trip event occurred in pole Ⅱ circuit of Pu''''er converter station when an experiment of the midpoint ground fault was executed on 22th January 2014,the situation of protection action is analyzed in detail. The cor-rectness and validity of the DC protection method proposed in this paper are pointed out. The areas and reasons of faults which may occur are analyzed according to the protection region. The equipments in fault region were tested,and the fault arresters were found out. It proves that the correlation analysis of the control and coordination strategy to DC transmission line fault protec-tion is correct and effective. This scheme provides a beneficial reference for analysis of the similar problems.
展开▼
