Design Optimization of Grading Shield Device for 500 kV Composite Cross-arms Based on Kriging Model and NSGA-II Algorithm

YANG Yang; LIU Peng; HUANG Li

doi:10.13296/j.1001-1609.hva.2026.02.023

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Design Optimization of Grading Shield Device for 500 kV Composite Cross-arms Based on Kriging Model and NSGA-II Algorithm

Research & Analysis | 更新时间：2026-03-16

- Design Optimization of Grading Shield Device for 500 kV Composite Cross-arms Based on Kriging Model and NSGA-II Algorithm
- High Voltage Apparatus Vol. 62, Issue 2, Pages: 183-193(2026)
- 作者机构：
  
  国网四川省电力公司超高压分公司，成都 610041
  三峡大学电气与新能源学院，湖北宜昌 443002
  三峡大学湖北省输电线路工程技术研究中心，湖北宜昌 443002
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.02.023
  CLC：
- Received：18 July 2025，
  
  Revised：2025-10-01，
  
  Published：16 February 2026
- 稿件说明：
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YANG Yang, LIU Peng, HUANG Li. Design Optimization of Grading Shield Device for 500 kV Composite Cross-arms Based on Kriging Model and NSGA-II Algorithm[J]. High Voltage Apparatus, 2026, 62(2): 183-193.
DOI：

YANG Yang, LIU Peng, HUANG Li. Design Optimization of Grading Shield Device for 500 kV Composite Cross-arms Based on Kriging Model and NSGA-II Algorithm[J]. High Voltage Apparatus, 2026, 62(2): 183-193. DOI： 10.13296/j.1001-1609.hva.2026.02.023.

摘要

超高压输电线路复合横担的绝缘结构复杂，部分重要区域电场畸变严重，极易发生电晕放电和电蚀损破坏，合理且有效的配置均压屏蔽装置是保障复合横担杆塔安全稳定运行的重要环节。为确定均压屏蔽装置的外形结构和具体参数尺寸，文中建立复合横担三维模型，首先利用有限元仿真软件获得复合横担无均压屏蔽装置下的电场分布情况，分析场强畸变严重部位电场分布特性并对均压屏蔽装置进行初步设计；然后，采用最优拉丁超立方设计方法在均压屏蔽装置结构参数变量空间中抽取试验样本点，通过有限元仿真获得不同样本点下的复合横担和均压屏蔽装置表面电场分布；其次，通过构建Kriging模型，搭建复合横担和均压屏蔽装置测点场强与均压屏蔽装置结构参数的响应关系近似模型，并基于灵敏度分析技术获得各结构参数对复合横担和均压屏蔽装置表面最高场强的影响程度；最后，通过第二代非劣排序遗传算法，获得最优均压屏蔽装置结构参数。结果表明，加装文中设计优化后的均压屏蔽装置，复合横担柱式绝缘子沿面场强峰值下降约63.5%，悬式绝缘子沿面场强峰值下降约54.7%，并且复合横担沿面场强和均压屏蔽装置表面场强均满足控制要求。优化方法为输电线路均压屏蔽装置优化设计提供重要的参考价值。

Abstract

The insulation structure of composite cross arms of EHV transmission lines is complex

and the electrical field distortion is serious in some important areas

the reasonable and effective configuration of grading shield device is an important link for ensuring to the safe and stable operation of the composite cross-arm tower. In order to determine the appearance structure and specific parameters of the grading shield device

a three-dimensional model of composite cross-arm is set up in this paper.Firstly

the electrical field distribution of the compound cross-arm without grading shield device is obtained by using simulation software

the electrical field distribution characteristics of the seriously distorted position are analyzed and the grading shield device is preliminarily designed. Then

the optimal Latin hypercube design method is adopted to extract the test sample points in the variable space of structural parameters of grading shield device

and the electrical field distribution on the surface of the composite cross-arm and the grading shield device under different sample points is obtained by finite element simulation. After that

by construct ing the Kriging model

the approximate model of the relationship between the field strength measured by the composite cross-arm and the grading shield device as well as the structural parameters of the grading shield device is built and

based on the sensitivity analysis technique

the influence of the structural parameters on the maximum field strength of the surface of the composite cross-arm and the uniform pressure shielding device is obtained. Finally

the optimal structure parameters of the grading shield device are obtained by theNSGA-Ⅱ.The results show that the field strength of composite cross-arm post insulator decreases by 63.5% and that of suspension insulator decreases by 54.7% when the grading shield device is installed

the surface field intensity of the composite cross-arm and the surface field intensity of the grading shield device can meet the control requirements.The optimization method can provide an important reference value for the optimal design of grading shield device of transmission lines.

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