低气压下长间隙交直流放电特性研究

doi:10.19595/j.cnki.1000-6753.tces.170079

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Abstract To research the characteristics of AC and DC discharges under low pressure condition, this paper carried out laboratory investigations of AC and DC dischargesby self-manufactured test chamber for 200-600mm rod-plane gaps within 0.5-60kPa. The relationship between discharge voltage Uand pressure P of different voltage modes are obtained, and the characteristics of U-Pcurves as well as their reasons are analyzed. The results show that, the U-P curves of AC, positive DC and negative DC discharges have significant differences. Within 2-4 kPa under DC voltage, a reversal of polarity effect occurred, and the magnitude of discharge voltage under positive and negative DC voltage changed from U_DC(-)<U_DC(+)to U_DC(+)<U_DC(-)with the increase of pressure value. The ionized layer formed on the surface of plane electrode when P≤2 kPa is the cause of the reversion of polarity effect. The U-P curves of AC discharge has saturation region due to the continuous partial streamer discharges within specific pressure range. These results have reference value for the study of long gap discharge underlow pressure.

Key words： Low pressure AC and DC discharge space charge polarity effect saturation characteristic

Received: 19 January 2017 Published: 14 March 2018

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TM852

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	Yang Yaqi
	LiWeiguo
	Xia Yu Yuan
	Chuangye

Cite this article:

Yang Yaqi,LiWeiguo,Xia Yu Yuan等. Research of AC and DC Discharge Characteristics of Long Gap under Low Pressure[J]. Transactions of China Electrotechnical Society, 2018, 33(5): 1143-1150.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.170079 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I5/1143

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