某110kV变电站35kV侧相间故障分析及治理措施研究

Analysis of Phase － to － phase Fault in 35 kV Side of a 110 kV Substation and Its Treatment Measures

摘要:

在中国，35 kV 电网直接向大客户供电，由于客户情况较复杂且相关保护措施不到位，经常出现相间故障继而 引起设备损坏。以四川电网某 110 kV 变电站 35 kV 侧 12 个月内发生的 4 次相间故障为对象，详细分析了每次故障 现象并指出了故障原因，提出了避免故障重演的治理方案。所分析的结论对 35 kV 相间故障的防治具有重要意义。

Abstract:

In China，35 kV power grid directly supplies to large customers，because of the complexity of the customers and the inadequate protection measures，there often occurs phase － to － phase faults which lead to the equipment damage． Taking the phase － to － phase faults which occurred in 35 kV side of a 110 kV substation in Sichuan power grid for 4 times as an object， the phenomenon of each fault is analyzed in detail，the causes of the failure are pointed out，and a treatment plan is proposed to avoid the repeated failures． The conclusion is of great importance to the prevention of 35 kV phase － to － phase faults．