气体绝缘开关中表面金属异物长期局部放电稀疏性特征的观测

doi:10.19595/j.cnki.1000-6753.tces.181604

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Abstract According to gas insulated switch insulation failure statistics, the surface failure accounts for the highest proportion. However, the defects detected by partial discharge are mostly air gaps and floating discharges, and the cases of surface discharge are rarely found. It is essential to study the effectiveness of the current on-site PD detection method for the detection of surface discharge defects. This paper designed a metal particle attached to the GIS insulator. Under the condition of constant voltage application, based on the full real-time UHF detection system, the long-term development process of the model discharge was studied. The sparsity characteristics of the surface metal particle in the long-term development stage were revealed, including the large dispersion of the discharge interval, varied from several seconds to several hours. The evaluation parameters of effective discharge capture probability P_e and effective spectrum capture probability P_G were proposed. Through the P_e and P_G curves, it was found that the existing GIS equipment online monitoring device had a small success rate (only 3.4%) for the surface discharge capture, and the probability of live detection capturing was low (only 6.5%). On this basis, a method to enhance the detection rate of the real-time acquisition system and extend the detection duration was proposed.

Key words： Gas insulated switch surface discharge metal particle long-term characteristic sparsity

Received: 09 October 2018 Published: 26 September 2019

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TM85

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	Zhang Liangen
	Lu Shijie
	Li Chengrong
	Cui Boyuan
	Wu Yuyi

Cite this article:

Zhang Liangen,Lu Shijie,Li Chengrong等. Observation on the Characteristics of Long-Term Partial Discharge Sparseness of Surface Metal Particle in Gas Insulated Switch[J]. Transactions of China Electrotechnical Society, 2019, 34(18): 3928-3936.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.181604 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I18/3928

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