两套直流系统窜电故障定位分析

Two sets of DC system channeling fault location

对110 kV配置两套直流系统的变电站发生两套直流系统窜电故障进行研究、分析了两套直流系统窜电后采用常规“拉路法”难以定位窜电故障点的现状,为了保证变电站直流系统稳定运行、快速定位故障点、提高站内设备动作可靠性,提出当站内直流系统绝缘检测装置不具备直流互窜检测功能时,类比使用直流接地查找仪查找站内直流系统接地故障的方法快速定位两套直流系统窜电故障点。

Allocation of 110 kV and above two sets of dc system of substation in two sets of dc system into electrical fault study,after power up two sets of dc system are analyzed using conventional method of“road”is difficult to locate the present situation of the electric point of failure,in order to guarantee stable operation of substation dc system,rapid positioning point of failure and improve the operation reliability of station equipment,When the insulation detection device of the dc system in the station does not have the detection function of dc interchanneling,it is proposed to find the grounding fault of the dc system in the station by using the grounding finder analogously to locate the fault points of two sets of DC system.