Optimization of Shielding Ring of Insulator String in 500 kV Substation

TANG Mingjun; YE Lisha; LIN Chunyao; YANG Shuai; LEI Jing; ZHOU Wenjun; YU Jianhui

doi:10.13296/j.1001-1609.hva.2015.05.012

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Optimization of Shielding Ring of Insulator String in 500 kV Substation

更新时间：2025-04-26

- Optimization of Shielding Ring of Insulator String in 500 kV Substation
- High VoltageApparatus Vol. 51, Issue 5, Pages: 63-70(2015)
- 作者机构：
  
  1. 广东电网有限责任公司电力科学研究院
  2. 武汉大学高电压研究所
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2015.05.012
  CLC： TM63;TM216
- Published：2015
- 稿件说明：
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[1]唐铭骏,叶丽莎,林春耀,杨帅,雷璟,周文俊,喻剑辉.500kV站用绝缘子串均压环优化设计[J].高压电器,2015,51(05):63-70.

TANG Mingjun, YE Lisha, LIN Chunyao, et al. Optimization of Shielding Ring of Insulator String in 500 kV Substation[J]. High voltageapparatus, 2015, 51(5): 63-70.
[1]唐铭骏,叶丽莎,林春耀,杨帅,雷璟,周文俊,喻剑辉.500kV站用绝缘子串均压环优化设计[J].高压电器,2015,51(05):63-70. DOI： 10.13296/j.1001-1609.hva.2015.05.012.

TANG Mingjun, YE Lisha, LIN Chunyao, et al. Optimization of Shielding Ring of Insulator String in 500 kV Substation[J]. High voltageapparatus, 2015, 51(5): 63-70. DOI： 10.13296/j.1001-1609.hva.2015.05.012.

摘要

为改善500 kV港城变电站电晕放电现象

根据其绝缘子串布置情况

利用有限元计算方法

在ANSYS中建立悬垂串与双联串仿真模型

研究均压环不同结构参数对绝缘子串电压、电场分布的影响

得到最优均压环结构参数。仿真结果表明

500 kV悬垂串均压环最佳结构参数为:罩深230 mm、环径660 mm、管径70 mm

均压环表面最大场强峰值可降至14.5 kV/cm;双联串均压环最佳结构参数为:屏蔽绝缘子片数3、管径100 mm、与绝缘子距离90 mm

均压环表面最大场强峰值可降至14.7 kV/cm。计算结果证明

优化后的均压环明显改善绝缘子串电压分布

降低了单片绝缘子承担的最大电压

并使均压环表面最大场强峰值低于20 kV/cm。

Abstract

To restrain the corona discharge phenomena in Gangcheng 500 kV substation

according to the actual circumstance of the substation

simulation models of suspension insulator string and double tension insulator string are established in ANSYS by using finite element method. The influences of different structural parameters of shielding rings on electric field and voltage distribution along an insulator string are calculated to achieve the optimum structural parameters of a shielding ring. Simulation results show that the optimum structural parameters of shielding ring are: 230 mm in cover depth

660 mm in diameter

and 70 mm in caliber for the 500 kV suspension insulator string

which can reduce the maximum peak value of electric field strength on the shielding ring to 14.5 kV/cm; and 3 in number of ring shields

100 mm in caliber

and 90 mm in distance between shielding ring and insulator for the double tension insulator string

which can reduce the maximum peak value of electric field strength on the shielding ring to 14.7 kV/cm. Calculation results show that the optimized shielding ring obviously improves the voltage distributions along the suspension insulator string and double tension insulator string

reduces the maximum voltage on single insulator

and makes the maximum peak value of electric field strength on shielding ring lower than 20 kV/cm.

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