配网线路避雷器阀片90/200μs冲击电流耐受特性试验  

Withstand Performance Tests of Arrester Varistors at Distribution Network Line Under 90/200 μs Impulse Current

作　　者：瞿佥炜 戴明秋 李锐海 江安烽[1] 孙伟[1] 傅正财[1] 

机构地区：[1]电力传输与功率变换控制教育部重点实验室上海交通大学电气工程系,上海200030 [2]特高压工程技术国家工程实验室南方电网科学研究院,广州510080

出　　处：《南方电网技术》2015年第7期46-51,共6页Southern Power System Technology

基　　金：特高压工程技术国家工程实验室开放基金资助(NEL201310)~~

摘　　要：为了试验调查现有线路避雷器阀片在90/200μs冲击电流下的耐受能力,对标称放电电流为5 k A和10 k A的两种Zn O避雷器阀片分别进行了不同能量等级下放电冲击次数为18次的90/200μs冲击电流耐受特性试验,并进行了相同能量等级下单次90/200μs冲击电流与4/10μs大电流冲击耐受特性对比试验。试验结果表明,相同能量等级下4/10μs大电流冲击对阀片造成的损伤大于单次90/200μs冲击电流造成的损伤;5 k A阀片最高可通过约3.5 k A的18次90/200μs冲击电流耐受特性试验,10 k A阀片最高可通过约7.3 k A的18次90/200μs冲击电流耐受特性试验;直流1 m A参考电压作为评价避雷器阀片性能判据的敏感度高于标称放电电流残压。To survey the withstand capability of existing line arrester varistors under 90 /200 μs impulse current,90 /200 μs impulse current tests of different grades of energy are applied on two kinds of Zn O arrester varistors whose nominal discharge current amplitude is 5 k A and 10 k A. Each test contains 18 times of 90 /200 μs impulse current. Besides,single 90 /200 μs impulse current test is applied on line arrester varistors in comparison with 4 /10 μs high current impulse test with the same energy level. The results of the tests showthat the damage of the 4 /10 μs high current impulse to the varistors is greater than the single 90 /200 μs impulse current with the same energy level; the 5 k A varistors can pass the 18 times of 90 /200 μs impulse current test whose amplitude of each impulse current is about 3. 5 k A; the 10 k A varistors can pass the 18 times of 90 /200 μs impulse current test whose amplitude of each impulse current is about 7. 3 k A; the 1 m A DC reference voltage is more sensitive than the residual voltage under the nominal discharge current as the criteria for measuring the performance of varistors.

关 键 词：冲击电流耐受特性 线路避雷器 90/200μs波形 

分 类 号：TM862[电气工程—高电压与绝缘技术]