高压电器2025，Vol.61Issue(8)：61-66,6.DOI:10.13296/j.1001-1609.hva.2025.08.008
双断口真空断路器非同步关合直流预击穿特性
DC Pre-breakdown Characteristics of Double-break Vacuum Circuit Breaker in Synchronous Making Operation
摘要
Abstract
The pre-breakdown phenomenon of double-break vacuum circuit breaker(VCBs)usually shows non-simultaneous breakdown of each break due to the influence of dispersion of closing operation,different contact sur-face conditions and dispersion of vacuum gap breakdown voltage.Nowadays,there is still a lack of research related to the pre-breakdown characteristics of non-synchronous making operation of series vacuum gap.The objective in this paper is to experimentally study the characteristic of pre-breakdown clearance and pre-breakdown voltage dis-tribution of the double-break vacuum circuit breaker in asynchronous making operation.In the experiment,two com-mercial vacuum interrupters(VIs)in series connection are taken as the study object and such four sets of experi-mental conditions for making operation as synchronous making operation of double breaks,making operation with low voltage side 1 ms faster than the high voltage side,making operation with high voltage 0.5 ms faster than the volt-age voltage side,making operation with high voltage side 0.2 ms faster than the low voltage side are set to simulate asynchronous making operation of double-break vacuum circuit breaker.The Weibull probability distribution of 50%pre-breakdown clearance d50 and the 50%pre-breakdown voltage U50 of each break is achieved by the experiment.The study results show that in case of making operation at high the break of high voltage side 0.2 ms faster than that of low voltage side,the dispersion of the pre-breakdown clearance of the double-break is smaller than in the syn-chronous making due to voltage division effect of the double-break vacuum circuit breaker.The asynchronous mak-ing operation of the double-break vacuum circuit breaker can change the voltage division ratio of the double-break vacuum circuit breaker.关键词
双断口断路器/预击穿特性/预击穿开距/真空断路器/真空灭弧室/非同步关合Key words
double-break circuit breaker/pre-breakdown characteristics/pre-breakdown clearance/vacuum circuit breaker/vacuum interrupter/asynchronous making operation引用本文复制引用
王毅钊,陈兴贵,韩寅峰,左晓婧,耿云,姚晓飞..双断口真空断路器非同步关合直流预击穿特性[J].高压电器,2025,61(8):61-66,6.基金项目
陕西省重点研发计划项目(2019ZDLGY18-04) （2019ZDLGY18-04）
国网陕西省电力公司科技项目(B626KY190001). Project Supported by Key Research and Development Program of Shaanxi(2019ZDLGY18-04),Technical Project of State Grid Shaanxi Electric Power Company Limited(B626KY190001). （B626KY190001）
