CAJ | 학술논문

电网短路故障是电压暂降的主要原因，准确定位暂降故障源的位置，不仅有利于供用电双方区分暂降责任，还可大幅缩短电力公司的故障清除时间，提高供电可靠性。提出一种基于多重判据的电压暂降故障源定位方法：从监测点布点入手，结合监测点可观测域和暂降源方位判断提取可能的故障线路；基于监测到的节点电压相量估计故障类型，在可能的故障线路上假设虚拟故障点，利用故障距离分布函数得到监测点电压计算值，根据计算值与测量值的误差分析结果定位暂降故障源。基于10节点和26节点网络的仿真，验证了所提方法的有效性和实用性。该方法可有效减少故障定位过程中的循环搜索过程，能够对伪故障点做出处理。
전망단로고장시전압잠강적주요원인，준학정위잠강고장원적위치，불부유리우공용전쌍방구분잠강책임，환가대폭축단전력공사적고장청제시간，제고공전가고성。제출일충기우다중판거적전압잠강고장원정위방법：종감측점포점입수，결합감측점가관측역화잠강원방위판단제취가능적고장선로；기우감측도적절점전압상량고계고장류형，재가능적고장선로상가설허의고장점，이용고장거리분포함수득도감측점전압계산치，근거계산치여측량치적오차분석결과정위잠강고장원。기우10절점화26절점망락적방진，험증료소제방법적유효성화실용성。해방법가유효감소고장정위과정중적순배수색과정，능구대위고장점주출처리。
The main cause of voltage sag is short-circuit fault in power grid. Accurate positioning of voltage sag fault source locations can not only help distinguish responsibilities between power utilities and users, but also shorten fault clearing time and improve power supply reliability. A voltage sag fault source location method based on multiple criteria was proposed. The arrangement strategy of power quality monitors’ setting was carried out. Then the possible fault lines were identified based on the monitor observation range and voltage sag source locations. The fault type of possible fault line was identified according to the measured node’s voltage phasors. The voltage values at the monitoring nodes were calculated based on the distance distribution functions, which were determined by the virtual fault points on the possible fault lines. The possible ranking results of the virtual fault points were determined by the errors between the calculated and measured voltage values at the monitoring nodes. The efficiency and practicability of the proposed method were verified based on the simulations of 10-bus and 26-bus power grids. The proposed method can diminish the circulation searching process and identify the false fault points.