油浸纸套管电容芯子浸渍不良缺陷的放电过程及其特征

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Abstract In order to study the degradation mechanism of the poor impregnated defect in oil-impregnated paper bushing (OIP), an OIP model is made by transparent sheath. A poor impregnated defect is designed by the non-vacuum oil injection after its linking oil. The parameter of changes of partial discharge, tan δ and capacitance are measured by the step by step raising voltage method, while the discharge phenomenon are observed. And also observing the position of bio-gas, gas-producing phenomenon, combined with trial anatomy, analysis of carbonization oil impregnated paper electrical tree channel. The result shows that PD detection is more sensitive for poor impregnated defect than tan δ and capacitance. The partial position is located at the edge of coil and electrical tree creepage would produce along the surface of oil-impregnated paper and produce continuous bubbles. The diffusion of Phase-resolved partial discharge is symmetrical about the 180° phase of applied votage. The φ-q spectrogram of partial discharge has a typical characteristic of the wing shape which may be used to diagnose the discharge type and severity of poor-impregnated defect in OIP.

Key words： Poor-impregnated defect oil-impregnated paper bushing capacitor cores partial discharge surface creepage fault diagnosis

Received: 13 August 2016 Published: 17 April 2017

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TM855

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	Dai Quanmin
	Qi Bo
	Zhuo Ran
	Li Chengrong
	Fu Mingli

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Dai Quanmin,Qi Bo,Zhuo Ran等. Discharge Process and Characteristics of the Poor Impregnated Defect of Capacitor Core in Oil-Immigrated Paper Bushing[J]. Transactions of China Electrotechnical Society, 2017, 32(7): 181-189.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I7/181

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