220kV线路多重雷击导致两侧开关断口绝缘击穿分析  

Analysis of Insulation Breakdown of Two Sides Breaker in 220 kV Transmission Line Caused by Multiple Lightning Strikes

作　　者：彭向阳 钟定珠 李凯曼 

机构地区：[1]广东省电力科学研究院,广东广州510600 [2]揭阳供电局,广东揭阳522000

出　　处：《高压电器》2009年第5期146-148,共3页High Voltage Apparatus

摘　　要：介绍220 kV线路雷击故障、两侧变电设备受损及断路器内部故障的发现、处理过程,结合线路故障查巡、雷电参数、过电压及继电保护动作时序分析,确定线路两侧开关雷电侵入波同时受损原因。指出因较短线路遭受多重雷击,造成开关断口内、外绝缘不能承受侵入波及其反射波的叠加作用而击穿,灭弧室瓷套在内、外部电弧持续热效应下可能发生爆炸。建议开展110、220 kV SF6断路器雷电冲击、反极性工频联合电压试验,并在强雷地区变电站110、220 kV架空出线侧加装避雷器保护。This paper introduces lightning strike fault of 220 kV line, substation equipments damage of two sides and inside trouble discovery of breaker; analysis line fault examination, lightning parameters, overvoltage and time relay protection, and confirms damage causation at the same time of two breakers; indicates that breakers strikes out because of multiple lightning strikes of short line and addition process of lightning intruding waves and its reflect waves. Then the out the combined voltage tests of lightning impulse and anti-polarity power frequency voltage test, lightning arresters on terminal of 110 kV, 220 kV overhead transmission line of strong lightning area.

关 键 词：架空线路 雷击故障 线路开关 雷电侵入波 

分 类 号：TM862[电气工程—高电压与绝缘技术]