Study on the Multiparameter Difference of Voltage Equalization Characteristics ofInsulator Strings of 750 kV Substation End Portal Frame

doi:10.7652/xjtuxb202308019

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Study on the Multiparameter Difference of Voltage Equalization Characteristics ofInsulator Strings of 750 kV Substation End Portal Frame

更新时间：2025-05-08

- Study on the Multiparameter Difference of Voltage Equalization Characteristics ofInsulator Strings of 750 kV Substation End Portal Frame
- Vol. 57, Issue 8, Pages: 194-205(2023)
- 作者机构：
  
  1. 西安交通大学电气工程学院,西安,710049
  2. 国网陕西省电力有限公司电力科学研究院,西安,711000
  3. 国网陕西省电力有限公司,西安,710100
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202308019
  CLC： TM854
- Online First：10 August 2023，
  
  Published：2023
- 稿件说明：
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Study on the Multiparameter Difference of Voltage Equalization Characteristics ofInsulator Strings of 750 kV Substation End Portal Frame[J]. 2023, 57(8): 194-205.
DOI：

Study on the Multiparameter Difference of Voltage Equalization Characteristics ofInsulator Strings of 750 kV Substation End Portal Frame[J]. 2023, 57(8): 194-205. DOI： 10.7652/xjtuxb202308019.

摘要

变电站紫外观测发现

750 kV变电站末端门型架绝缘子串相对其他位置电晕现象较为严重

因此对不同类型绝缘子串的均压特性进行差异性分析。搭建750 kV变电站三维模型

对带跳线和不带跳线绝缘子串的均压特性进行对比

利用子模型网格技术和模型细节简化技术对整体模型进行简化

计算结果显示

简化之后的模型误差为0.5%

计算时间下降了78.9%。利用两参数和四参数结构分析方法对均压环、屏蔽环的相对距离和管径、环径进行同步分析

得到带跳线和不带跳线的绝缘子串均压环、屏蔽环的最佳参数配置。计算结果显示

对于不带跳线的绝缘子串

需要配置屏蔽环的中心距增加100 mm、环径增加210 mm、管径增加10 mm

均压环的抬高距增加270 mm、环径增加40 mm

才可以达到与带跳线绝缘子串相同的屏蔽效果。研究结果表明

变电站末端门架绝缘子串需要配置更大尺寸的均压环和屏蔽环

多参数结构分析方法有效。

Abstract

For the severe corona

found through ultraviolet observation

at insulator strings of the 750 kV substation end portal frame

which is more severe than that in other positions

a difference analysis on the voltage equalization characteristics of different types of insulator strings is proposed. Firstly

a three-dimensional model of 750 kV substation is built

and the voltage equalization characteristics of insulator strings with and without jumpers are compared. The overall model is simplified by the submodel mesh and detail simplification technology. Calculation results show that the error of the simplified model is only 0.5%

and the calculation time decreases by 78.9%. Then

two-parameter and four-parameter structural analysis methods are used to synchronously analyze the relative distances

pipe diameters and ring diameters of shielding rings and grading ring. Finally

the optimal parameter configuration of the insulator string grading ring and shielding rings with and without jumpers is obtained. According to the results

to achieve the same shielding effect as insulator strings with jumpers

insulator strings without jumpers require an increase in center distance

ring diameter and pipe diameter of the shielding ring by 100 mm

210 mm and 10 mm respectively

and an increase in the lifting distance and ring diameter of the grading ring by 270 mm and 40 mm

respectively. The study results indicate that the insulator strings of the substation end portal frame need to be equipped with larger grading rings and shielding rings. The structural optimization process also verifies the effectiveness of the multiparameter structural analysis method.

关键词

Keywords

references

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