中国电机工程学报2017，Vol.37Issue(10)：2790-2797,8.DOI:10.13334/j.0258-8013.pcsee.170262
110kV复合型放电间隙避雷器的电气性能
Electrical Performance of 110kV Compound Discharge Gap Lightning Arrester
摘要
Abstract
In order to reduce the lightning trip-out rate of 110kV transmission line,a kind of 110kV lightning arrester with compound discharge gap is proposed based on the principle of free-of-reignition of multi-short-gaps after extinguishing at current zero.The arrester is connected in series by multi-short-gaps structure and one large discharge gap.It allows multi-short-gaps to be broken down and establish arc channels.Under the action of high pressure generated in the short gap,the arc is removed outside.The arc extinguishes after power frequency follow current zero and the maximum voltage distributed on a single short gap is not enough to reignite,which ensures that the arc will not reignite again.In this paper,the reliability of free-of-reignition of multi-short-gaps after extinguishing at current zero was evaluated by power frequency follow current test.And then lightning impulse test,raining test and pollution test were performed to evaluate the electrical performance of the lightning arrester.The test results show that the arrester has good ability to interrupt power frequency follow current and the arc will not reignite.The excellent characteristics of the device under lightning impulse and raining are proved,and it can be applied to the heavily polluted areas.In conclusion,the compound discharge gap lightning arrester satisfies the requirements of reliable operation of 110 kV transmission line and enables reliable arc extinction before relay protection action.It means that the arrester can be used for lightning protection of 110 kV overhead transmission line.关键词
避雷器/放电间隙/多短间隙/熄弧/工频续流/电气性能Key words
lightning arrester/discharge gap/multi-short-gaps/arc extinction/power frequency follow current/electrical performance分类
信息技术与安全科学引用本文复制引用
林淑娟,李涵,李功新,周文俊,郭婷,邵涛..110kV复合型放电间隙避雷器的电气性能[J].中国电机工程学报,2017,37(10):2790-2797,8.基金项目
国家自然科学基金青年科学基金项目(51307125) （51307125）
国家电网公司重点科技项目(SGTYHT/14-JS-188).Youth Science Foundation of National Natural Science Foundation of China (51307125) （SGTYHT/14-JS-188）
Key Scientific and Technological Project of State Grid (SGTYHT/14-JS-188). （SGTYHT/14-JS-188）
