Optimization for Ultra-High Voltage AC Bushing Screening Electrode Structure

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Optimization for Ultra-High Voltage AC Bushing Screening Electrode Structure

更新时间：2025-07-09

- Optimization for Ultra-High Voltage AC Bushing Screening Electrode Structure
- Vol. 46, Issue 2, Pages: 88-92(2012)
- 作者机构：
  
  西安交通大学电力设备电气绝缘国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM854;TM726.1
- Online First：10 February 2012，
  
  Published：2012
- 稿件说明：
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Optimization for Ultra-High Voltage AC Bushing Screening Electrode Structure[J]. 2012, 46(2): 88-92.
DOI：

Optimization for Ultra-High Voltage AC Bushing Screening Electrode Structure[J]. 2012, 46(2): 88-92. DOI：

摘要

针对套管尾部均压球表面电场分布不均匀、容易发生电晕及绝缘介质击穿的问题

应用三维有限元法

对特高压交流套管的电位电场分布进行了仿真计算

得出套管尾部均压球表面的电场分布不均匀

上、下段弧面的场强较高

中间区域的场强较低.分析了均压球的结构参数对其表面电场分布的影响

并以此确定了均压球结构优化的目标函数.在此基础上

利用神经网络拟合了均压球结构参数与优化目标之间的关系

得到了均压球结构参数的最优解.通过对特高压交流变压器套管尾部均压球结构优化

均压球表面最大电场强度降低了20%

均压球表面电场分布更加均匀

提高了套管尾部闪络电压

且结构简单、易于生产.

Abstract

For the uneven electrical distribution on screening electrode of ultra-high voltage AC bushing

hence often leading to corona and dielectric puncture

the electric field and voltage distribution of ultra-high voltage AC bushing are evaluated with 3D FEM. It is found that the field strength on the upper and lower arcs of the screening electrode gets higher

but on the intermediate region gets lower. By changing the structure parameters of screening electrode

the influences of shape of the electrode on electric field distribution are analyzed

and the optimization objective function is established accordingly. The neural network model is constructed to map the structure parameters of screening electrode on the optimal goal. As a result

the maximum electric field strength decreases by 20%

electric field distribution becomes more uniform

and the flashover voltage of busing is heightened. The structure of the optimized screening electrode is simple and easy to be produced.

关键词

Keywords

references

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