高压电器2012，Vol.48Issue(3)：104-107,112,5.
SF6断路器开断能力数值预测方法研究综述
Review of the Numerical Prediction Method for the Interruption Capability of SF6 Circuit Breakers
牟京卫 1郭瑾 1李兴文 2陈冰 1辛昭昭 1游一民1
作者信息
- 1. 西安高压电器研究院,西安710077
- 2. 西安交通大学电力设备电气绝缘国家重点实验室,西安710049
- 折叠
摘要
Abstract
Numerical prediction methods both for the thermal interruption capability and the dielectric recovery capability of SF6 gas circuit breaker (GCB) are reviewed in the paper. The arc conductance 200 ns (G200) before current zero is a key parameter of the thermal interruption capability of the GCB. The magneto-hydro-dynamics (MHD) model is applied during the arcing process and the Mayr model is 'adopted near current zero to evaluate the Gxo- Then the arc time constant and the arc power loss coefficient could be obtained. To evaluate the dielectric recovery capability of GCB, the reduced electric field strength Ec has to be calculated everywhere in the interrupter after current zero. The reduced critical electric filed strength ￡a has to be computed as well. The probability of the dielectric breakdown after current zero can be judged by the comparison of the ￡a and Ec. It has to be indicated that the proposed numerical prediction methods are still need to be verified by further experimental efforts.关键词
SF6断路器/热击穿/电击穿Key words
SF6 gas circuit breaker/ thermal breakdown/ dielectric breakdown分类
信息技术与安全科学引用本文复制引用
牟京卫,郭瑾,李兴文,陈冰,辛昭昭,游一民..SF6断路器开断能力数值预测方法研究综述[J].高压电器,2012,48(3):104-107,112,5.
