真空直流强迫过零开断中的弧后电流

doi:10.19595/j.cnki.1000-6753.tces.191673

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Abstract

In order to investigate the post arc current in DC interruption, the high speed hybrid actuator was designed and the post arc current measuring system was established. Then, experiments were carried out to study the influence on the post arc current, including the amplitude of rated current, electrode gap, commutation frequency and commutation capacitor voltage. The results indicate that post arc current is instable within a certain range. The post arc current increases with the increase of the electrode gap, and is nearly unchanged at the same gap. When the rated breaking current is less than 800A, the post arc current has a high rising rate, while the rising rate of the post arc current decreases when the rated breaking current is in the range of 800~1 800A. The post arc current increases obviously with the increase of the commutation frequency, which determines the amplitude of the post arc current. In addition, the commutation capacitor voltage should also be controlled to reduce the post arc current.

Key words： DC interruption forced current zero post arc current commutation frequency commutation capacitor voltage

Received: 02 December 2019

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TM56

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	Articles by authors
	Zhang Ying
	Qin Taotao
	Liu Zhao

Cite this article:

Zhang Ying,Qin Taotao,Liu Zhao. Post Arc Current in Vacuum DC Interruption with Forced Current Zero Method[J]. Transactions of China Electrotechnical Society, 2021, 36(2): 417-424.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.191673 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I2/417

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