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

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    直流分量時間常數對斷路器非對稱開斷性能影響分析

    來源:電工電氣發布時間:2016-08-18 10:18 瀏覽次數:9
    直流分量時間常數對斷路器非對稱開斷性能影響分析
     
    劉小浩,劉旭,李健,蘇其莉,劉超峰,王磊
    (河南平高電氣股份有限公司,河南 平頂山 467001)
     
        摘 要:從短路電流的有效值、燃弧時差、電弧能量等方面分析了直流分量時間常數對斷路器非對稱電流開斷性能的影響,給出了非對稱短路計算模型及計算方法。結果表明直流分量時間常數越大,短路電流中直流分量越大且衰減越慢,燃弧時差越大,電弧能量越大,電流過零時di /dt 降低,TRV 參數亦有所降低,且非對稱電流開斷時,直流分量時間常數增大將導致斷路器的開斷條件變得苛刻。
        關鍵詞:直流分量時間常數;非對稱開斷;短路電流有效值;燃弧時差
        中圖分類號:TM561     文獻標識碼:A     文章編號: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
     
    參考文獻
    [1] 林莘. 現代高壓電器技術[M]. 北京:機械工業出版社,2011.
    [2] GB 1984—2014 高壓交流斷路器[S].
    [3] 吳盛剛,孔祥軍,李向陽,等. 非對稱電流開斷合成試驗方法分析[J]. 電工電氣,2011(10):49-53.
    [4] 李剛,姚斯立,杜煒,等.UHV 斷路器非對稱電流開斷試驗方法研究[J]. 高壓電器,2013,49(4):20-24.
    [5] IEC 62271-308:2002 高壓開關設備和控制設備 第308 部分:非對稱短路試驗方式T100a 的導則[S].
     
     
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