交流接触器最佳分断区域的探讨

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摘要为抑制交流接触器分断过程的电弧,以触头电压为研究对象,在大量试验的基础上对不同分断时刻触头电压的变化趋势及电流过零后的熄弧情况进行了研究。利用小波能量谱分析了不同电流、不同功率因数情况下交流接触器在电流过零前1 ms内不同分断区域的电弧电压能量时谱,统计和分析电弧电压第一次过零前后的变化趋势和特征。对交流接触器最佳分断区域进行探讨并提出以触头电压过零后300 μs内的高尺度小波能量时谱最大值作为电弧重燃与否的判断依据。确定了电流过零前 0.4～0.6 ms和0.9～1.0 ms两个最佳分断区域并提出了基于分断时刻t_f及小波能量时谱幅值E4的交流接触器自适应分断控制策略。

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	郑昕
	许志红

关键词 ：触头电压, 熄弧, 最佳分断区域, 小波能量谱, 控制策略

Abstract：In order to restrain the arc of the AC contactor during breaking, the contact voltage is set as the research objective.The trends of the contact voltage and the arc extinguishing after zero current under different breaking time are studied based on vast experiment data.The energy time spectrums of the arc voltage of the AC contactor in different breaking areas within 1ms before zero current are analyzed by wavelet energy spectrum under different currents and different power factors.The change trend and characteristics of the arc voltage before and after zero crossing are counted and analyzed.The best breaking areas for AC contactor are discussed.And the maximum value of the high scales wavelet energy time spectrum within 300 μs after zero crossing of the contact voltage is presented as the criterion of arc reigniting.Two areas of 0.4~0.6 ms and 0.9~1.0 ms are determined to be the best breaking areas.Then the adaptive control strategy for breaking AC contactors is presented based on the breaking time t_f and the amplitude of the wavelet energy time spectrums E4.

Key words： Contact voltage arc extinguishing best breaking areas wavelet energy spectrum control strategy

收稿日期: 2014-06-06 出版日期: 2016-04-20

PACS:

TM572

基金资助:国家自然科学基金(51277031)和福建省自然科学基金(2015J01192)资助项目。

作者简介: 郑昕男,1976年生,博士,副教授,研究方向为智能电器及其在线监测。E-mail:27480389@qq.com(通信作者);许志红女,1963年生,教授,博士生导师,研究方向为智能电器及其在线监测。E-mail:xuzhihong2008@yahoo.com.cn

引用本文:

郑昕, 许志红. 交流接触器最佳分断区域的探讨[J]. 电工技术学报, 2016, 31(7): 198-206. Zheng Xin, Xu Zhihong. An Exploration on the Best Breaking Areas of AC Contactors. Transactions of China Electrotechnical Society, 2016, 31(7): 198-206.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2016/V31/I7/198

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