±550kV直流气体绝缘金属封闭开关设备长期带电试验研究

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Abstract The existing converter platform of the offshore wind power all adopts conventional open equipment and electrical connection layout, which occupies the large space. In order to reduce the platform space and weight, the DC gas insulated switchgear (GIS) is used to replace the original open equipment. Insulation parts operate under the unipolar DC voltage for a long time, which generates surface charge accumulation, thus changing the electric field distribution and reducing the flashover voltage. There is no international and domestic standard for DC GIS, and systematic test guidance and operation experience are short. The long-term live test (prototype installation test) can effectively verify the reliability and stability of DC GIS. This paper focuses on the long-term test scheme and prototype, based on the multi-physical field coupling simulation, proposes the test scheme, and designs the prototype form.

Key words： high voltage direct current transmission for offshore wind power DC gas insulated switch (GIS) surface charge accumulation long-term live test

Received: 03 November 2023

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	Articles by authors
	YAO Xuan
	NAN Zhenle
	DU Wenjuan
	ZHANG Boya
	LI Yixuan

Cite this article:

YAO Xuan,NAN Zhenle,DU Wenjuan等. Study on long-term live test for ±550kV DC gas insulated switchgear[J]. Electrical Engineering, 2024, 25(3): 46-52.

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http://dqjs.cesmedia.cn/EN/Y2024/V25/I3/46

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