126kV单断口真空断路器全电压关合试验研究  

Full-voltage Switching Test for a 126 kV Vacuum Circuit Breaker

作　　者：刘平[1] 姚晓飞[2] 杜炜[1] 刘朴[1] 刘志远[2] 袁佳[1] 胡晶[1] 

机构地区：[1]西安高压电器研究院有限责任公司,西安710077 [2]西安交通大学电气工程学院,西安710049

出　　处：《高压电器》2013年第10期88-93,共6页High Voltage Apparatus

摘　　要：笔者旨在通过试验研究126kV单断口真空断路器在全电压关合过程中出现的一种新现象．即关合过程中自电压跌落至大电流引入期间，出现预击穿电弧自熄灭、触头间隙多次击穿且电流引入时间呈波动性大现象。采用合成试验方法与直接试验方法分别对126kV真空断路器进行全电压关合试验．OP2（a）和T100（a）。采用合成回路试验方法进行试验时，采用了两种关合装置。试验结果表明：采用合成试验回路进行全电压关合试验时。关合装置的时延远远大于300μs．不能满足IEC62271—100—2008标准对高压合成关合试验的要求，且关合过程中触头间隙发生多次预击穿现象；采用直接试验回路进行全电压关合试验时．触头间隙同样会发生多次预击穿现象，且电流引入时间具有不稳定性（200～800μs），这是高压真空断路器本身特性决定的．The purpose of this paper is to illustrate the new phenomenon in a full-voltage switching test of a 126 kV vacuum circuit breaker （VCB）, i.e. pre-brokendown vacuum arcs self-quench, the gap between contacts is broken several times, and the current generating time fluctuates significantly. Synthetic test method and direct test method were adopted in the full-voltage switching test for the 126 kV single-break VCB. In the synthetic test circuit, two kinds of switching devices were adopted. Test results show that in the synthetic test circuit, the time delay of two switching devices is much longer than 300 p,s, which can not meet the requirement in the standard IEC 62271-100--2008 for full-voltage switching test. And in the direct test circuit, the current generating time fluctuates from 200μs to 800μs. The delay period is from the first prestrike to the start of power frequency high-current rising, which depends on the characteristics of the high-voltage VCB.

关 键 词：126 kV单断口真空断路器 全电压关合试验 预击穿 合成试验方法 直接试验方法 

分 类 号：TM561.2[电气工程—电器]