某±800kV直流线路地线断裂原因分析及建议

刘庆丰; 李辉; 陈路; 侯长健

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某±800kV直流线路地线断裂原因分析及建议

故障与分析 | 更新时间：2025-11-18

- 某±800kV直流线路地线断裂原因分析及建议
- Cause Analysis and Suggestion on Ground Wire Fracture for a ±800kV DC Transmission Line
- 湖南电力 2020年40卷第2期页码：37-41
- 作者机构：
  
  中国能源建设集团湖南省电力设计院有限公司
- 作者简介：
- 基金信息：
- DOI：
  中图分类号： TM752
- 纸质出版：2020
- 稿件说明：
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[1]刘庆丰,李辉,陈路,侯长健.某±800kV直流线路地线断裂原因分析及建议[J].湖南电力,2020,40(02):37-41.

LIU Qingfeng, LI Hui, CHEN Lu, et al. Cause Analysis and Suggestion on Ground Wire Fracture for a ±800kV DC Transmission Line[J]. 2020, 40(2): 37-41.
[1]刘庆丰,李辉,陈路,侯长健.某±800kV直流线路地线断裂原因分析及建议[J].湖南电力,2020,40(02):37-41. DOI：

LIU Qingfeng, LI Hui, CHEN Lu, et al. Cause Analysis and Suggestion on Ground Wire Fracture for a ±800kV DC Transmission Line[J]. 2020, 40(2): 37-41. DOI：

摘要

某800kV直流线路的地线因覆冰过重发生断裂

事故造成线路单极闭锁故障

线路长时间处于单极运行状态。通过输电线路电气计算软件从地线覆冰不平衡张力、地线下倾角、脱冰跳跃等方面进行综合分析计算

得出地线覆冰不平衡张力和悬垂线夹损坏后地线发生滑移是本次事故的主要原因。根据事故分析情况提出治理建议

为后续工程设计提供参考。

Abstract

The ground wire of a 800 kV DC transmission line broke due to heavy icing

which resulted in single pole blocking fault and a single pole operation state for a long time. Through the comprehensive analysis and calculation of the unbalanced ice covering tension of the ground wire

the dip angle of the ground wire

the ice breaking jump and other aspects by the electrical calculation software of the transmission line

it is concluded that the unbalanced ice covering tension of the ground wire and the slip of the ground wire after the damage of the suspension clamp are the main causes of the accident. According to the analysis of the accident

some suggestions are put forward to avoid similar accidents again

which also provides reference for the follow-up engineering design.

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