Insulation Design Rule for a Spacer in SF<inf>6</inf>/N<inf>2</inf>-filled DC Gas Insulated Apparatus

Hongyang Zhou; Guoming Ma; Meng Zhang; Cong Wang; Youping Tu; Chengrong Li

doi:10.17775/CSEEJPES.2020.02100

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Insulation Design Rule for a Spacer in SF6/N2-filled DC Gas Insulated Apparatus

Regular Papers | 更新时间：2026-10-15

- Insulation Design Rule for a Spacer in SF6/N2-filled DC Gas Insulated Apparatus
- CSEE Journal of Power and Energy Systems Vol. 10, Issue 2, Pages: 727-735(2024)
- 作者机构：
  
  1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University,Beijing,China
  2. Beijing Key Laboratory of High Voltage and EMC, North China Electric Power University,Beijing,China
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2020.02100
  CLC：
- Published：01 March 2024
- 稿件说明：
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Hongyang Zhou, Guoming Ma, Meng Zhang, et al. Insulation Design Rule for a Spacer in SF6/N2-filled DC Gas Insulated Apparatus[J]. CSEE Journal of Power and Energy Systems, 2024, 10(2): 727-735. DOI: 10.17775/CSEEJPES.2020.02100.
DOI：

Hongyang Zhou, Guoming Ma, Meng Zhang, et al. Insulation Design Rule for a Spacer in SF6/N2-filled DC Gas Insulated Apparatus[J]. CSEE Journal of Power and Energy Systems, 2024, 10(2): 727-735. DOI: 10.17775/CSEEJPES.2020.02100. DOI：

摘要

Abstract

A recurring challenge of a DC SF

-filled GIS/GIL apparatus is the charge accumulation at DC stress. The conventional design rules and knowledge of AC spacers may not be applicable for this new type of apparatus. A novel design rule is proposed considering the effect of accumulated charge on the threshold of electric field strength being resistant to the superposed voltage. A surface charge accumulation simulation model is introduced

and the key parameters in the simulation model are measured. In addition

an experimental platform for a 100 kV spacer flashover test is established. Spacer flashover tests under superimposed voltage with opposing polarities are carried out

and the withstanding voltage of the spacer is obtained. Finally

based on the proposed model

the threshold of the surface electric field strength (tangential component) on the DC spacer in SF

mixed gases is discussed. For a reliable insulation design of a DC GIS/GIL apparatus filled with 0.7 MPa SF

the threshold of surface electric field strength on the DC spacer is 12 kV/mm. The insulation design rule can

be referenced in the design of a high-voltage DC SF

-filled GIS/GIL apparatus.

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Related Institution

Key Laboratory of Smart Grid of Education Ministry, School of Electrical and Information Engineering, Tianjin University

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Insulation Design Rule for a Spacer in SF6/N2-filled DC Gas Insulated Apparatus

DOI：10.17775/CSEEJPES.2020.02100

摘要

Abstract

关键词

Keywords

references