Finite Element Calculation and Experiment of Potential Distribution for a 500 kV Porcelain Zinc Oxide Arrester

SUN Hao1; LI Xing-wen2

doi:10.13296/j.1001-1609.hva.2010.03.005

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Finite Element Calculation and Experiment of Potential Distribution for a 500 kV Porcelain Zinc Oxide Arrester

更新时间：2025-04-26

- Finite Element Calculation and Experiment of Potential Distribution for a 500 kV Porcelain Zinc Oxide Arrester
- High VoltageApparatus Vol. 46, Issue 3, Pages: 23-27(2010)
- 作者机构：
  
  1. 中能电力科技开发有限公司
  2. 西安交通大学电力设备电气绝缘国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2010.03.005
  CLC： TM862
- Published：2010
- 稿件说明：
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[1]孙浩,李兴文.500 kV瓷套式氧化锌避雷器电位分布的有限元分析与实验研究[J].高压电器,2010,46(03):23-27.

SUN Hao1, LI Xing-wen2. Finite Element Calculation and Experiment of Potential Distribution for a 500 kV Porcelain Zinc Oxide Arrester[J]. High voltageapparatus, 2010, 46(3): 23-27.
[1]孙浩,李兴文.500 kV瓷套式氧化锌避雷器电位分布的有限元分析与实验研究[J].高压电器,2010,46(03):23-27. DOI： 10.13296/j.1001-1609.hva.2010.03.005.

SUN Hao1, LI Xing-wen2. Finite Element Calculation and Experiment of Potential Distribution for a 500 kV Porcelain Zinc Oxide Arrester[J]. High voltageapparatus, 2010, 46(3): 23-27. DOI： 10.13296/j.1001-1609.hva.2010.03.005.

摘要

荷电率是设计氧化锌避雷器的一项关键指标。针对一500 kV瓷外套式氧化锌避雷器

首先应用有限元方法

通过设置合理的计算边界来简化开域电场问题的求解

并采用耦合自由度的方法解决电位悬浮导体问题

计算了避雷器中的电位分布;接着在避雷器最大持续运行电压下

采用光纤-电流法

通过测量避雷器中电阻片的轴向电压分布

验证了计算方法的正确性和有效性;然后分析了计算边界大小、均压环参数、安装高度等对电位分布的影响。发现:增大安装高度

可使上节和下节MOA的电压分布系数趋于理想;下均压环对改善电位分布的作用最为显著。

Abstract

Chargeability is a crucial parameter for the design of ZnO arrester.For a 500 kV porcelain ZnO arrester

its potential distribution is calculated with finite element method

where reasonable boundary is set to simplify the solution of the open boundary field problem

and the strategy of coupled degrees of freedom is adopted to deal with the floating conductors.Then the potential distribution of the arrester is tested with optical fiber-current measurement method under the maximum continuous operating voltage.Compared with the calculation results

the validation of the proposed method is verified.Finally

the influences of the size of calculation boundary

the parameters of grading ring and the mounting height on potential distribution are analyzed

and the results demonstrate that the potential distribution coefficient of the upper and lower sections of MOA can be improved through increasing mounting height

and the lower grading ring has more significant influence on the potential distribution.

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