Analysis on Surface Electric Field Distribution and Corona Inception Electric Field Strength of Stranded Conductor

ZHANG Shiling

doi:10.13296/j.1001-1609.hva.2018.04.016

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Analysis on Surface Electric Field Distribution and Corona Inception Electric Field Strength of Stranded Conductor

更新时间：2025-04-26

- Analysis on Surface Electric Field Distribution and Corona Inception Electric Field Strength of Stranded Conductor
- High VoltageApparatus Vol. 54, Issue 4, Pages: 107-112+119(2018)
- 作者机构：
  
  国网重庆市电力公司电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.04.016
  CLC： TM75
- Published：2018
- 稿件说明：
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[1]张施令.钢芯铝绞线表面电场分布及其电晕起始场强分析[J].高压电器,2018,54(04):107-112+119.

ZHANG Shiling. Analysis on Surface Electric Field Distribution and Corona Inception Electric Field Strength of Stranded Conductor[J]. High voltageapparatus, 2018, 54(4): 107-112+119.
[1]张施令.钢芯铝绞线表面电场分布及其电晕起始场强分析[J].高压电器,2018,54(04):107-112+119. DOI： 10.13296/j.1001-1609.hva.2018.04.016.

ZHANG Shiling. Analysis on Surface Electric Field Distribution and Corona Inception Electric Field Strength of Stranded Conductor[J]. High voltageapparatus, 2018, 54(4): 107-112+119. DOI： 10.13296/j.1001-1609.hva.2018.04.016.

摘要

钢芯铝绞线广泛应用于交流输电线路中

绞线表面电晕是输电线路运行中需考虑的重要问题之一

因此有必要对钢芯铝绞线表面电场分布及其电晕起始场强进行分析。文中运用有限元法提出了钢芯铝绞线表面电场分布及其电晕起始场强的计算方法

计算结果表明:运用有限元法能较准确计算绞线周围的精细电场分布

等半径的光滑导线和绞线表面最大场强相差约28%;绞线电晕起始电压决定于绞线周围电场分布

且随绞线半径的增大和最外层股数的增加

电晕起始电压逐渐升高并呈现饱和趋势。提出的计算方法和所得结论可为交流输电线路的设计提供理论依据。

Abstract

Stranded conductor is widely used in the AC transmission line

and corona of stranded conductor is one ofthe key problems in the operation of transmission line

so it is necessary to analyze the surface electric field distribu-tion and corona inception voltage of stranded conductors. In this paper

the calculation method of surface electricfield distribution and corona inception voltage of stranded conductors using finite element method（FEM）is proposed.The calculation results show that: the FEM can accurately calculate the fine electric field distribution

the maximumfield strength difference between the smooth conductor and stranded conductor with the same radius is about 28%.Moreover

the corona inception voltage increases with the increase of the overall conductor radius and the number ofexternal strands

and tends to be saturated. The calculation method and conclusions presented in this paper providethe theoretical basis for the design of the AC transmission lines.

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