摘要
从长间隙真空开关的击穿特性出发,理论推导得到双断口及多断口真空开关的击穿电压最大可能增益倍数Kn,同时引入"击穿弱点"概念和概率统计方法,分析建立了双断口及多断口真空开关的静态击穿统计分布模型,发现无论是双断口真空开关还是n个断口串联起来,其击穿的统计概率都要比单断口的击穿统计概率要小.为了进行实验论证,建立了三断口真空开关实验模型,对单断口真空灭弧室模型和三断口真空开关实验模型进行了大量的冲击击穿特性实验.研究表明,三断口真空灭弧室相比单断口真空灭弧室具有更低的击穿概率.试验数据与理论分布曲线基本吻合,证明理论研究结果正确.
Based on the analysis of breakdown property of the vacuum gap in long distance, investigations were made on the vacuum circuit-breaker （VCB） with double-breaks or multi-breaks in high voltage power system. The improvement factor K. of breakdown-voltage is theoretically induced for VCBs with multiple breaks compared with single-break ones which have the same equivalent gap length. From the research on the breakdown weak points in high voltage vacuum gaps, their turn out and distribution, some theoretical work was made to set up the models for describing the statistical property of multi-breaks VCBs＇ breakdown. The single and triple-break models were set up for experimental research to prove the theoretical results. The results show that the triple-break vacuum interrupters in series have the higher improvement factor of breakdown-voltage and lower breakdown probability compared with the single-break one. It can be demonstrated in a preliminary study that the experimental results do confirm the previous theoretical studies.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
2007年第5期740-745,共6页
Journal of Dalian University of Technology
基金
国家自然科学基金资助项目(50537010)
关键词
真空开关
击穿电压增益
击穿弱点
统计特性
vacuum circuit-breakers
improvement factor of breakdown-voltage
breakdown weak points
statistical property
作者简介
廖敏夫（1975-），男，博士．副教授，E-mail：mfliao@dlut．edu．cn.
邹积岩（1954-），男，教授，博士生导师．
