Suzhou Electric Appliance Research Institute
期刊號: CN32-1800/TM| ISSN1007-3175

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一起斷路器防跳回路缺陷案例的分析及改進方法

來源:電工電氣發(fā)布時間:2021-04-30 13:30 瀏覽次數(shù):726

一起斷路器防跳回路缺陷案例的分析及改進方法

高遠,劉懷宇,趙睿
(國網(wǎng)江蘇省電力有限公司檢修分公司,江蘇 南京 211100)

 

    摘 要:防跳回路在斷路器操作回路中意義重大,能有效防止斷路器發(fā)生“跳躍”對斷路器本身和電網(wǎng)造成的巨大沖擊。針對某新建變電站驗收時發(fā)現(xiàn)的防跳試驗后斷路器不能再次進行手動合閘的問題,闡述了斷路器本體機構防跳和操繼箱防跳兩種方式的原理,分析了該起斷路器防跳回路缺陷的原因,給出了一種在現(xiàn)場缺少多余防跳繼電器輔助接點情況下,消除防跳回路寄生回路的改進方法,現(xiàn)場試驗驗證了該方法的有效性。
    關鍵詞:斷路器;防跳回路;缺陷處理
    中圖分類號:TM561     文獻標識碼:B     文章編號:1007-3175(2021)04-0034-04
 
Analysis and Improvement Method for Leap-Preventive
Circuit Defect of Breaker
 
GAO Yuan, LIU Huai-yu, ZHAO Rui
(State Grid Jiangsu Electric Power Co., Ltd. Maintenance Branch Company, Nanjing 211100, China)
 
    Abstract: The leap-preventive circuit is of great significance in the operation circuit of breaker, and can effectively prevent the breaker from “leaping” which may cause a huge impact on the breaker itself and the power grid. According to the found problem during acceptance of a new substation that breaker cannot be manually closed again after leap-preventive test, this paper expounds the principles of leap-preventivecircuit in body mechanism and operating box, analyzes the cause of the leap-preventive circuit defect, and presents an improved method to eliminate the parasitic loop of leap-preventive circuit in the absence of auxiliary nodes of redundant leap-preventive relays. The effectiveness of the method is verified on site.
    Key words: breaker; leap-preventive circuit; defect handling
 
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