Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

Article retrieval

文章检索

首页 >> 文章检索 >> 往年索引

直流分量时间常数对断路器非对称开断性能影响分析

来源:电工电气发布时间:2016-08-18 10:18 浏览次数:9
直流分量时间常数对断路器非对称开断性能影响分析
 
刘小浩,刘旭,李健,苏其莉,刘超峰,王磊
(河南平高电气股份有限公司,河南 平顶山 467001)
 
    摘 要:从短路电流的有效值、燃弧时差、电弧能量等方面分析了直流分量时间常数对断路器非对称电流开断性能的影响,给出了非对称短路计算模型及计算方法。结果表明直流分量时间常数越大,短路电流中直流分量越大且衰减越慢,燃弧时差越大,电弧能量越大,电流过零时di /dt 降低,TRV 参数亦有所降低,且非对称电流开断时,直流分量时间常数增大将导致断路器的开断条件变得苛刻。
    关键词:直流分量时间常数;非对称开断;短路电流有效值;燃弧时差
    中图分类号:TM561     文献标识码:A     文章编号:1007-3175(2016)08-0047-04
 
Analysis of Direct Current Component Time Constant Influence on
Asymmetrical Breaking Ability of Circuit Breakers
 
LIU Xiao-hao, LIU Xu, LI Jian, SU Qi-li, LIU Chao-feng, WANG Lei
(Henan Pinggao Electric Co., Ltd., Pingdingshan 467001, China)
 
    Abstract: This paper analyzed the direct current (DC) component time constant influence on asymmetrical current breaking ability of circuit breakers from the aspects of effective value of short-circuit current, difference of arcing time, arc energy and so on, and gave the calculation model and method of asymmetrical short-circuit. The results show that the bigger the DC component time constant is, the bigger the DC component in short-circuit current is, the slower the attenuation is, the bigger the difference of arcing time is , the bigger the arc energy is. When the current is zero, the parameters of di/dt and TRV are decreased. When the asymmetrical current cuts off, the increase of the DC component time constant will make the breaking conditions of circuit breakers more rigorous.
    Key words: direct current component time constant; asymmetrical breaking; effective value of short-circuit current; difference of arcing time
 
参考文献
[1] 林莘. 现代高压电器技术[M]. 北京:机械工业出版社,2011.
[2] GB 1984—2014 高压交流断路器[S].
[3] 吴盛刚,孔祥军,李向阳,等. 非对称电流开断合成试验方法分析[J]. 电工电气,2011(10):49-53.
[4] 李刚,姚斯立,杜炜,等.UHV 断路器非对称电流开断试验方法研究[J]. 高压电器,2013,49(4):20-24.
[5] IEC 62271-308:2002 高压开关设备和控制设备 第308 部分:非对称短路试验方式T100a 的导则[S].