35 kV高压开关柜首次充电故障原因分析

Causal Analysis of of 35 kV high-voltage Switchgear Fault During Initial Energization

高压开关柜在首次充电过程中常发生故障,这不仅影响了电力系统的安全稳定运行,也给电力公司带来了经济损失。以35 kV高压开关柜为研究对象,通过对一起首次充电发生故障的案例进行分析,探究了故障的具体原因。通过现场检查发现该故障主要由三个因素引起:一是开关柜内触头盒受潮凝露;二是在首次充电前的检查中漏检了部分关键设备的绝缘状态;三是首次充电操作过程中存在不规范操作。基于上述发现提出了相应的预防措施和建议,包括加强高压开关柜内部接地系统的检查与维护、优化首次充电前的检查流程、加强操作人员的培训等,以期为今后高压开关柜的安全稳定运行提供参考。

High-voltage switchgears often encounter faults during the initial energization process,which impacts safe and stable operation of the electric system and also results in economic losses of electric enterprises.This essay reports briefly the on-site inspection and causal analysis on a fault case of initial energization encountered by an actual 35 kV high-voltage switchgear.The causal factors of the fault was determined to be moisture and condensation of the internal contact box,the slip in the pre-energization examination which omitted insulation status of some key equipment,and standard-violated behavior during energizing operation.The essay also gives corresponding preventive measures and suggestions with respect to the fault accident,including strengthening inspection and maintenance of internal earthing system,optimizing pre-energization inspection process flow,improving operator training,etc.,hoping to provide useful information for the handling of similar problems.