Analysis on Electric Field Intensity and Onset Corona Zone on the Split Conductor Surface of UHV Transmission Line

HUANG Hong-pei1; LI Yong-ming1; XU Lu-wen2; FENG Ling2; LI Gang2; ZHANG Jian3; ZHENG Chun-xu1

doi:10.13296/j.1001-1609.hva.2012.12.003

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Analysis on Electric Field Intensity and Onset Corona Zone on the Split Conductor Surface of UHV Transmission Line

更新时间：2025-04-26

- Analysis on Electric Field Intensity and Onset Corona Zone on the Split Conductor Surface of UHV Transmission Line
- High VoltageApparatus Vol. 48, Issue 12, Pages: 1-5(2012)
- 作者机构：
  
  1. 重庆大学输配电装备及系统安全与新技术国家重点实验室
  2. 重庆市电力科学试验研究院
  3. 四川绵阳电业局
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2012.12.003
  CLC： TM751
- Published：2012
- 稿件说明：
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[1]黄宏佩,李永明,徐禄文,冯凌,李刚,张剑,郑春旭.特高压输电线分裂导线表面电场及起晕分析[J].高压电器,2012,48(12):1-5.

HUANG Hong-pei1, LI Yong-ming1, XU Lu-wen2, et al. Analysis on Electric Field Intensity and Onset Corona Zone on the Split Conductor Surface of UHV Transmission Line[J]. High voltageapparatus, 2012, 48(12): 1-5.
[1]黄宏佩,李永明,徐禄文,冯凌,李刚,张剑,郑春旭.特高压输电线分裂导线表面电场及起晕分析[J].高压电器,2012,48(12):1-5. DOI： 10.13296/j.1001-1609.hva.2012.12.003.

HUANG Hong-pei1, LI Yong-ming1, XU Lu-wen2, et al. Analysis on Electric Field Intensity and Onset Corona Zone on the Split Conductor Surface of UHV Transmission Line[J]. High voltageapparatus, 2012, 48(12): 1-5. DOI： 10.13296/j.1001-1609.hva.2012.12.003.

摘要

输电导线起晕的重要判别条件是导线表面电场强度是否达到临界值。为研究分裂导线表面电晕分布情况

根据单相八分裂导线起晕电压试验值

先运用模拟电荷法计算了1 000 kV特高压八分裂子导线表面每个匹配点的电场强度值

然后与用经验公式计算出的临界场强对比

找出子导线表面的电晕分布区域

并计算出了该域内的起晕点个数、起晕角度、占导线表面比等数据以及子导线半径、导线高度对起晕分布的影响。分析计算表明:每根子导线在表面有限范围内起晕

且占整个导线表面积的30%～40%;对地高度越高子导线表面起晕范围越大

子导线半径对起晕范围也有一定影响。通过研究工作

期望对分析导线的电晕损耗等问题提供有力的帮助。

Abstract

The onset corona criterion of transmission line is that the electric field intensity on conductor surface exceeds a certain critical value.In this paper

in order to study distribution of corona zones on split conductor surface

the charge simulation method is employed to calculate the electric field intensity of each matching point on the surface of a 1 000 kV UHV single-phase 8-split conductor according to the relative experimental value of onset corona voltage.The onset corona zone distribution on the conductor surface is obtained by comparing the calculated electric field intensity values with the ones from empirical formula.Furthermore

the number of onset corona points

the angle of onset corona zone

as well as the influences of conductor’s radius and height on the distribution of onset corona zones

are achieved.The results show that onset corona zones account for 30%～40% of whole conductor surface;the higher the conductor height

the larger the onset corona zone;the radius of split conductor also influences the area of onset corona zone.This study may facilitate the analysis of corona loss in transmission line.

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