省网开关柜有关绝缘问题及分析  

Analysis of Insulation with Metal-enclosed Switchgear in Henan Grid

作　　者：黄兴泉[1] 俎洋辉[2] 李卫国[2] 王栋[1] 刘亚辉[3] 

机构地区：[1]国网河南省电力公司电力科学研究院,河南郑州450052 [2]国网河南省电力公司安阳供电公司,河南安阳455000 [3]国网河南省电力公司许昌供电公司,河南许昌461000

出　　处：《河南电力》2015年第4期10-15,共6页Henan Electric Power

摘　　要：调查显示,绝缘故障是引发开关柜严重故障甚至烧毁主要原因,绝缘缺陷主要为导体表面存在毛刺或尖端、柜内空气绝缘净距离不足、穿板套管等绝缘元件气隙或裂纹、柜内密封不良或受潮等。避免绝缘缺陷引发故障的有效方法是加强绝缘件局部放电试验和出厂整柜及交接并柜电晕试验。It is investigated that the insulation fault is the main reason caused serious fault and even burned in metal-enclosed switchgear. There are several main types of insulation defects such as burrs or cutting edge on the conductor surface, more shortly of air insulation distance, air gap or crack in insulating element likely the bushing across-board, and bad seal or damp in metal-enclosed switchgear. The efficient way to avoid the insulation fault is to partial discharge test for insulation unit, and the entire metal-enclosed switchgear corona test in the factory and parallel arrangement of metal-enclosed switchgear corona test when the acceptance.

关 键 词：开关柜 绝缘 故障 

分 类 号：TM643[电气工程—电力系统及自动化]