电工技术学报  2015, Vol. 30 Issue (24): 55-60    DOI:
论文 |
燃弧时间对混合型直流真空断路器分断特性的影响
刘路辉1, 庄劲武2, 王晨2, 江壮贤2
1. 海军工程大学舰船缩电力技术国防科技重点实验室 武汉 430033; 2. 海军工程大学电气工程学院 武汉 430033
Effect of Arcing Time upon the Interruption Characteristic of the Hybrid DC Vacuum Circuit Breaker
Liu Luhui1, Zhuang Jinwu2, Wang Chen2, iang Zhuangxian2
1. National Key Laboratory of Science and Technology on Vessel Integrated Power System Wuhan 430033 China; 2. Naval University of Engineering Wuhan 430033 China
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摘要 利用可拆卸真空灭弧室,研究了直径45mm的CuCr50平板触头,在不同的燃弧时间下采用强迫换流法分断2~5kA直流的特性,通过高速摄像机对分断过程进行了拍摄。实验结果表明,分断引燃电弧的过程存在单弧柱和双弧柱两种情况。燃弧时间小于2ms,换流电流投入时,电弧有一定程度扩散但依旧为桥柱形状态。单弧柱情况燃弧面积小于电极表面,过电压作用下的重燃点多为原电弧引燃处;双弧柱情况电弧分布占据电极的面积增加,分断性能提高。燃弧时间大于2.5ms,换流电流投入时触头间隙中电弧已完全扩散且相对均匀,重燃点随机分布。结合前人对不同触头结构下电弧形态演化规律的认识,讨论得出横磁型触头结构适于直流分断的结论。
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刘路辉
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关键词 燃弧时间混合型直流真空断路器电弧形态分断性能重燃    
Abstract:Based on forced commutation principle, the influences of arcing time on the interruption characteristics of DC 2~5kA is studied, using diameter 45mm CuCr50 butt contacts in a demountable vacuum chamber. The interruption process was taken down by high-speed photography. Experiment results show that the arc is initiated with either one arc column or two arc columns burning in parallel at the instant of contact separation. For arcing time<2ms, the arc expands while retaining its appearance as the counter current was injected. If there is one arc column, the arcing surface is less than the electrode’s surface and the reignition points are always the rupture points. If there are two arc columns, the arcing area increases and the interruption capability improves. For arcing time>2.5ms, arc spreads fully and coveres the whole contact, and the reignition distribution is random. Prior studies on the development of vacuum arc modes are discussed, and it is concluded the transversal magnetic field electrodes are suitable for DC current interruption.
Key wordsArcing time    hybrid DC vacuum breaker    arc mode    interruption characteristic    reignition   
收稿日期: 2013-09-27      出版日期: 2015-12-30
PACS: TM561  
基金资助:国家重点基础研究发展计划(973计划)(2012CB215103),国家自然科学基金(51207166、51377166和51307179)资助项目
作者简介: 刘路辉 男,1986年生,助理研究员,主要研究方向为航船电力系统保护和能量调控与管理。庄劲武 男,1967年生,教授,博士生导师,主要研究方向为电力系统自动化与安全运行。
引用本文:   
刘路辉, 庄劲武, 王晨, 江壮贤. 燃弧时间对混合型直流真空断路器分断特性的影响[J]. 电工技术学报, 2015, 30(24): 55-60. Liu Luhui, Zhuang Jinwu, Wang Chen, iang Zhuangxian. Effect of Arcing Time upon the Interruption Characteristic of the Hybrid DC Vacuum Circuit Breaker. Transactions of China Electrotechnical Society, 2015, 30(24): 55-60.
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