高压开关柜典型故障分析与防范对策研究  

作　　者：严倚天 童谣 沈牧宙 严浩军 

机构地区：[1]宁波送变电建设有限公司,浙江宁波315010 [2]宁波市电力设计院有限公司,浙江宁波315010 [3]宁波永耀电力投资集团有限公司,浙江宁波315010

出　　处：《科技创新与应用》2024年第36期165-168,172,共5页Technology Innovation and Application

摘　　要：变电站10~35 kV高压开关柜的故障时有发生,为此通过实际案例,分析其故障原因。认为绝缘材料老化、柜内湿度超标导致凝露和导电回路接触电阻增大致使温度过高是造成开关柜故障的内部主要原因,而雷电过电压和弧光接地过电压则是导致开关柜故障的外部主要原因。针对这些故障原因,提出相应防范措施。Faults of 10~35 kV high-voltage switchgear in substation occur from time to time.Therefore,the reasons for the failure are analyzed through practical cases.It is believed that aging of insulating materials,excessive humidity in the cabinet,resulting in condensation and excessive temperature resulting in increased contact resistance of conductive circuits,are the main internal causes of switchgear faults,while lightning overvoltage and arc grounding overvoltage are the main external causes of switchgear faults.Aiming at these failure causes,corresponding preventive measures are put forward.

关 键 词：开关柜 故障 防范措施 过电压 电弧光保护 

分 类 号：TM643[电气工程—电力系统及自动化]