Nonlinear E-field Simulation of Converter Transformer Outlet and Its Structure Optimization

ZHANG Shiling; PENG Zongren

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Nonlinear E-field Simulation of Converter Transformer Outlet and Its Structure Optimization

更新时间：2025-12-08

- Nonlinear E-field Simulation of Converter Transformer Outlet and Its Structure Optimization
- Vol. 44, Issue 6, Pages: 2048-2059(2018)
- 作者机构：
  
  1. 国网重庆市电力公司电力科学研究院
  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：
  CLC：
- Published Online：10 July 2018，
  
  Published：2018
- 稿件说明：
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ZHANG Shiling, PENG Zongren. Nonlinear E-field Simulation of Converter Transformer Outlet and Its Structure Optimization[J]. 2018, 44(6): 2048-2059.
DOI：

ZHANG Shiling, PENG Zongren. Nonlinear E-field Simulation of Converter Transformer Outlet and Its Structure Optimization[J]. 2018, 44(6): 2048-2059. DOI：

摘要

直流稳态和极性反转是换流变压器出线装置两种典型的运行状态

且环氧浸纸、变压器油、油浸纸板等介质的电性能参数具有较强的场变、温变非线性。温度梯度条件下

其电性能参数的改变将影响复合绝缘的直流稳态和极性反转电场。基于此

为较准确模拟复合绝缘结构在考虑温度分布条件下的直流稳态场和极性反转瞬态场

建立了换流变出线装置复合绝缘结构全模型

应用RBF神经网络与NSGA-II混合算法对换流变出线装置进行了结构优化

对优化后的出线装置在工频电压、极性反转电压下进行了电场校核计算。结果表明温度梯度条件下较等温条件下的场强过冲现象更加显著

套管尾部、直型屏障的场强过冲系数分别达到65%、45%。以上研究成果可为换流变压器出线结构的设计提供参考。

Abstract

The static DC and PR are two typical operation conditions of converter transformer outlet

moreover

the electrical parameters of RIP

transformer oil and OIP have nonlinear relationship with E-field stress and temperature. Under a temperature gradient

the electrical parameters will modify the static DC and PR E-field distribution of composite insulation. In order to simulate the static DC and PR electric field of the composite insulation structure

we established a full model of the converter transformer outlet. Then

the structure parameters of the converter transformer outlet were optimized using combined RBF neural network and NSGA-II algorithm. Moreover

the electric field verification calculation were carried out under AC and PR conditions. The results show that

under uniform temperature condition

the E-field strength is more significant than that under isothermal condition

and the overshoot coefficient of the bushing end and barrier reaches 65% and 45%

respectively. The study can provide a reference for the design of outlet structure of the converter transformer.

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