高压电器2025，Vol.61Issue(3)：42-51,10.DOI:10.13296/j.1001-1609.hva.2025.03.005
均压电容对双断口真空断路器预击穿特性的影响研究
Study on Influence of Grading Capacitor on Pre-strike Characteristic of Double-break Vacuum Circuit Breaker
摘要
Abstract
The double-break vacuum circuit breaker can effectively improve the withstanding voltage level,signifi-cantly reduce the reignition rate,enhance the reactive power switching performance and thereby have significant practical engineering implications.In this paper,such pre-breakdown characteristic as pre-strike clearance and its dispersion,pre-strike voltage,pre-strike filed strength of double-break vacuum circuit breaker with and without shunt grading capacitors under DC voltage in case of making operation is studied through experiment,and its Weibull distribution is calculated.The result shows that the grading voltage of the double-break is more even through reasonable size of grading capacitance(about 100 pF),thus effectively improving the pre-strike characteris-tic of the vacuum circuit breaker.The experimental result shows that with the increase of the grading capacitance,the pre-strike characteristic will become weak of the double-break vacuum circuit breaker when the grading capaci-tance exceeds 500 pF.The study in this paper can provide technical support of the double-break vacuum circuit breaker from the point of view of reducing electrical dispersion and improving controlled making accuracy.关键词
双断口真空断路器/预击穿特性/均压电容/相控关合Key words
double-break vacuum circuit breaker/pre-strike characteristics/grading capacitance/controlled switching引用本文复制引用
李洪伟,徐学帅,熊晓川,黄博,马留二..均压电容对双断口真空断路器预击穿特性的影响研究[J].高压电器,2025,61(3):42-51,10.基金项目
南网云南电网有限责任公司科技项目资助(050800KK52222038).Project Supported by Science and Technology Project of China Southern Grid Yunnan Power Grid Co.,Ltd.(050800KK52222038). （050800KK52222038）
