低压交流电弧电流零区电压波形特征分析与应用

doi:10.19595/j.cnki.1000-6753.tces.191497

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Abstract The voltage and current waveforms of the AC arc contain rich arc characteristic information.In a very short time after the arc current zero-crossing,the competition between dielectric recovery strength and voltage recovery strength determines the arc state.Voltage waveform at the current zero can reflect the characteristics of AC arcing trend to some extent.Based on the wavelet energy spectrum,this paper studies the relation between the voltage waveform characteristics and arcing trend under different conditions.Simulation and experimental results show that the high-scale wavelet energy spectrum eigenvalue of the arc voltage is related to the arcing trend in the current zero.Using the fourth-scale wavelet energy spectrum eigenvalue as the arc re-striking criterion,an adaptive breaking control strategy for intelligent AC contactor is proposed.Hardware control modules are adopted to verify the effectiveness of proposed strategy,which provides a way for AC arc characteristic analysis and low-voltage switch intelligent control.

Key words： AC arc current zero voltage waveform characteristics wavelet energy spectrum adaptive control

Received: 18 November 2019

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TM572

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	Zheng Xin
	Shan Xiaojie

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Zheng Xin,Shan Xiaojie. Characteristic Analysis and Application Research of Low Voltage AC Arc Voltage Waveform at the Current Zero[J]. Transactions of China Electrotechnical Society, 2020, 35(22): 4717-4725.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.191497 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I22/4717

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