Partial Discharge Analysis and Structure Design of Solid-insulated Ring Main Units with 12 kV Coated Shield

HOU Chunguang; LI Qiuhong; GAO Youhua

doi:10.13296/j.1001-1609.hva.2018.06.037

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Partial Discharge Analysis and Structure Design of Solid-insulated Ring Main Units with 12 kV Coated Shield

更新时间：2025-04-26

- Partial Discharge Analysis and Structure Design of Solid-insulated Ring Main Units with 12 kV Coated Shield
- High VoltageApparatus Vol. 54, Issue 6, Pages: 241-247(2018)
- 作者机构：
  
  沈阳工业大学电器新技术与应用研究所
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.06.037
  CLC： TM643
- Published：2018
- 稿件说明：
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[1]侯春光,李秋红,高有华.12 kV涂敷屏蔽层的固体绝缘环网柜局部放电分析与结构设计[J].高压电器,2018,54(06):241-247.

HOU Chunguang, LI Qiuhong, GAO Youhua. Partial Discharge Analysis and Structure Design of Solid-insulated Ring Main Units with 12 kV Coated Shield[J]. High voltageapparatus, 2018, 54(6): 241-247.
[1]侯春光,李秋红,高有华.12 kV涂敷屏蔽层的固体绝缘环网柜局部放电分析与结构设计[J].高压电器,2018,54(06):241-247. DOI： 10.13296/j.1001-1609.hva.2018.06.037.

HOU Chunguang, LI Qiuhong, GAO Youhua. Partial Discharge Analysis and Structure Design of Solid-insulated Ring Main Units with 12 kV Coated Shield[J]. High voltageapparatus, 2018, 54(6): 241-247. DOI： 10.13296/j.1001-1609.hva.2018.06.037.

摘要

为分析喷锌层对固体绝缘环网柜的电场分布及局放水平的影响

笔者建立了12 kV涂敷屏蔽层的绝缘筒三维模型

采用有限元分析方法对其进行了电场仿真。分析发现绝缘筒进线套管末端的电场和电力线分布不规律

存在局部放电的危险。提出在原有绝缘筒上添加接地屏蔽环和屏蔽网的措施

来改善进线绝缘套管末端局部电场集中的问题。仿真和实验结果表明:加入接地屏蔽环和屏蔽网的改进方法使得喷锌后的绝缘筒的整体电场分布变得均匀

同时提高了绝缘筒的平均熄灭电压

验证了此改进方法在工程应用中是可行、有效的。能有效提高固体绝缘环网柜的绝缘性能

同时也为改善固体绝缘环网柜的绝缘设计提供一定的理论参考。

Abstract

To analyze the effect of zinc-sprayed layer on the electric field distribution and the partial discharge level of a solid-insulated ring main unit

a three-dimensional model of 12 kV insulating cylinder with coated shield is established

and the finite element analysis is performed to simulate its electric field. Analysis shows that the distributions of electric field and electric force line are uneven at the end of inlet line sleeve of the insulating cylinder

which brings the risk of partial discharge. Therefore

grounding shielding ring and shielding mesh are applied to the insulating cylinder to release the local electric field concentration at the end of inlet line insulation sleeve. Simulation and experiment show that the application of the grounding shielding ring and shielding mesh makes the whole electric field distribution of the insulating cylinder with zinc-sprayed layer become uniform

meanwhile raises the average extinction voltage

verifying the improvement method of the insulating cylinder is feasible and effective. The proposed method can enhance the insulation performance of the solid-insulated ring main units

and may provide a reference for improving the insulation design of the solid-insulated ring main units.

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