10kV小电流接地系统单相接地故障的选线方式

Line selection for single-phase ground faults of 10 kV small current grounding systems

配电系统采用小电流接地系统可以提高供电可靠性,为了及时发现和切除发生单相接地故障的线路,通常采用加装单相接地自动选线装置。分析了采用这一装置的机理,介绍了上海松江供电分公司10 kV配电网络采用消弧线圈接地方式和并联中电阻选线方法后的运行情况。

Adopting the small current grounding system can improve the distribution system reliability, however, the small current grounding system should be equipped with the single-phase fault line selection device in order to detect and insulate the faulty line in time. The working principle of the device is presented, and operation of the 10 kV distribution network of Songjiang Power Supply Company after it adopts the arc suppression coil grounding system and the parallel medium-resistance line selection device is illuminated.