GPO-3隔板对棒-板间隙工频击穿电压的影响及表面残余电荷特性

doi:10.19595/j.cnki.1000-6753.tces.190186

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Abstract The insulation performance of the whole system can be greatly improved by introducing the insulation barrier. The effects of size, position and thickness of insulation barrier on ac breakdown voltage were studied. Furthermore, the surface residual charge properties on the barrier after discharge were measured by non-contact surface potentiometer. The experimental results indicate that the breakdown voltage of the system increases up to 1.91 times. When the thickness exceeds about 6mm, the increase of breakdown voltage is not obvious. Obvious residual charges can be observed on the barrier after breakdown, while the surface potential of GPO-3 reaches 3 856V after breakdown and reduces to 239V after 1h. The peak density of surface charges on GPO-3 are 1.59×10¹⁹/m³ and 8.87×10¹⁸/m³ respectively, and the trap level is about 1.0eV. This paper can provide a reference for the design of the insulation barrier.

Key words： Rod-plane air gap insulation barrier AC breakdown voltage surface residual charge surface trap distribution

Received: 25 February 2019 Published: 24 April 2020

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TM853

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	Zan Haibin
	Li Guochang
	Wang Jingbing
	Wei Yanhui

Cite this article:

Zan Haibin,Li Guochang,Wang Jingbing等. Influence of GPO-3 Barrier on AC Breakdown Voltage of Rod-Plane Gaps and Surface Residual Charge Characteristics[J]. Transactions of China Electrotechnical Society, 2020, 35(8): 1799-1806.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.190186 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I8/1799

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