路灯线路断零线故障分析

Analysis of the Zero Line Break Fault of Streetlights Circuit

结合实例,分析了当三相四线路灯线路发生断零线故障后,零线断点后的路灯线路在三相负载不对称(每相亮灯个数不同)的情况下,亮灯个数对三相电压大小的影响,并对由一相路灯引起负载不对称的两种情况进行了定量分析。

In this paper, the problem of broken zero line in a three-phase four-wire streetlights system is analyzed with examples. For the circuit after the open point of the zero line, the influence of the number of lights on the phase voltages in case of three-phase asymmetric load(the number of lights each phase is different) is explained. And the two cases of asymmetric loads caused by the failure of lights are quantitatively analyzed.