Electric field computation of ±1000 kv dc wall bushing with consideration of space charge effects

被引：3

作者：

Zhang Li ^{[1
]}

Zhang Lina ^{[1
]}

Li Qingmin ^{[2
]}

Zou Liang ^{[1
]}

Yu Chunhui ^{[1
]}

机构：

[1] Shandong Univ, Jinan 250061, Peoples R China

[2] North China Elect Power Univ, Beijing 102206, Peoples R China

来源：

INTERNATIONAL TRANSACTIONS ON ELECTRICAL ENERGY SYSTEMS | 2014年 / 24卷 / 02期

基金：

中国国家自然科学基金;

关键词：

UHV DC bushing; E-field computation; space charge effect; polarity; reversal; insulation optimization;

D O I：

10.1002/etep.1761

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

+/- 1000kVDC wall bushing under planning is a complex insulation system which bears the effects imposed by different working conditions. The existence of space charge distorts the electric field distribution, which might result in electric breakdown especially when polarity reversal occurs. Based on space charge theory, the amount of space charge can be calculated. A finite-element model for +/- 1000kVDC wall bushing is established to analyze the electric field distribution under DC, AC and polarity reversal conditions especially considering the space charge effects. The electric field distribution with thermal stress is also calculated in this paper to incorporate the influence of the dielectric temperature gradients. The research results provide useful reference for electric field computation and further insulation optimization in developing ultra high voltage DC wall bushings. Copyright (c) 2013 John Wiley & Sons, Ltd.

引用

页码：297 / 304

页数：8

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