Research on Anti-subsidence Fracture of Grounding Grid Based on Optimized Installation Methods

QI Wenyan; LI Tian; HUANG Zhihao; YE Fang; YU Jinshan; MAO Hua; ZHANG Shenghan

doi:10.13296/j.1001-1609.hva.2025.10.022

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Research on Anti-subsidence Fracture of Grounding Grid Based on Optimized Installation Methods

Power Disaster Prevention and Mitigation Technology in New Power System· | 更新时间：2025-10-21

- Research on Anti-subsidence Fracture of Grounding Grid Based on Optimized Installation Methods
- High Voltage Apparatus Vol. 61, Issue 10, Pages: 209-217(2025)
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- DOI：10.13296/j.1001-1609.hva.2025.10.022
  CLC：
- Received：20 April 2025，
  
  Revised：2025-07-08，
  
  Published：16 October 2025
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QI Wenyan, LI Tian, HUANG Zhihao, et al. Research on Anti-subsidence Fracture of Grounding Grid Based on Optimized Installation Methods[J]. High voltage apparatus, 2025, 61(10): 209-217.
DOI：

QI Wenyan, LI Tian, HUANG Zhihao, et al. Research on Anti-subsidence Fracture of Grounding Grid Based on Optimized Installation Methods[J]. High voltage apparatus, 2025, 61(10): 209-217. DOI： 10.13296/j.1001-1609.hva.2025.10.022.

摘要

为了解决电力系统中接地网因地面沉降引发的接地引下线断裂问题。文中提出了一种新型的接地网铺设方案，即将接地网水平导体的铺设方向由传统的横向铺设（宽度面向上）优化为竖向铺设（厚度面向上）。通过有限元分析方法对地面沉降量分别为10、20、50、100 mm时，两种铺设方式下的镀锌扁钢接地网的受力与形变情况进行了系统模拟与分析。结果表明，竖向铺设的接地网在水平导体和接地引下线所承受的应力及形变量方面均显著优于横向铺设的接地网。在地面沉降量为100 mm时，横向铺设接地网接地引下线承受的应力达到了Q235钢的屈服强度，而竖向铺设接地网接地引下线所受应力仅为横向铺设的接地网的35.7%，远低于接地导体和接地引下线的屈服强度。竖向铺设方式可以有效减小接地网以及接地引下线在地面沉降过程中所承受的应力，从而增强接地网在地面沉降灾害环境下的可靠性与稳定性，为电力系统在复杂地质条件下的安全运行提供新的技术思路与保障措施。

Abstract

To address the issue of conductor fractures in power system grounding grid caused by land subsidence

a novel grounding grid installation scheme is proposed in this paper

namely

the laying direction of the horizontal conductor of the grounding network is optimized from the traditional horizontal laying (width facing up) to vertical laying (thickness facing up) . Through the finite element analysis method

a sysmetric simulation and analysis are conducted on the stress and deformation of galvanized flat steel grounding grid under two installation methods when ground subsidence reaches 10 mm

20 mm

50 mm and 100 mm respectively. The results show that the vertically installed grounding grid demonstrates significantly superior performance in terms of both stress and deformation resistance at horizontal conductors and grounding down conductors compared to the horizontally installed configuration. At the ground subsidence level of 100 mm

the stress on the grounding down conductors of the horizontally installed grounding grid reaches the yield strength of Q235 steel

whereas the stress on the vertically installed grid’s down conductors is only 35.7% of that in the horizontal configuration-well below the yield strength of both grounding conductors and down conductors. The vertical installation method can effectively reduce the stress exerted on both the grounding grid and down conductors during ground subsidence

thereby enchancing the reliability and stability of the grounding system in subsidence-prone environments.This approach provides novel technical insights and safeguarding mea sures for ensuring the safe operation of power system under complex geological conditions.

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