Internal Overvoltage and Insulation Coordination of Electrode Line in HVDC Project

XIE Shijun; SU Shaochun; HE Huiwen; GUO Rongping; LIU Fan; ZHANG Chenmeng

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Internal Overvoltage and Insulation Coordination of Electrode Line in HVDC Project

更新时间：2025-12-08

- Internal Overvoltage and Insulation Coordination of Electrode Line in HVDC Project
- Vol. 44, Issue 7, Pages: 2331-2337(2018)
- 作者机构：
  
  1. 国网四川省电力公司电力科学研究院
  2. 中国电力科学研究院有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：30 July 2018，
  
  Published：2018
- 稿件说明：
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XIE Shijun, SU Shaochun, HE Huiwen, et al. Internal Overvoltage and Insulation Coordination of Electrode Line in HVDC Project[J]. 2018, 44(7): 2331-2337.
DOI：

XIE Shijun, SU Shaochun, HE Huiwen, et al. Internal Overvoltage and Insulation Coordination of Electrode Line in HVDC Project[J]. 2018, 44(7): 2331-2337. DOI：

摘要

为研究高压换流站接地极线路内过电压产生机理、影响因素及分布特性

以某特高压直流输电工程为研究对象

在EMTDC/PSCAD环境下

建立了过电压分析模型。根据仿真结果

分析了过电压幅值与流经接地极线路的电流幅值及电流变化率的关系

揭示了直流系统在发生故障或运行方式转化期间于接地极线路上形成的不平衡电流剧烈变化是造成内过电压的主要原因;过电压主要受故障类型、故障位置、接地极线路长度的影响

且沿接地极线路呈线性降低的分布特点;讨论了接地极线路绝缘水平优化配置方法

确定了接地极线路并联间隙参数选取原则

提出了高压直流输电系统的接地极线路设计和运行建议。

Abstract

To reveal the formation mechanism of internal overvoltage of electrode line in HVDC

its influence factors

and distribution feature

an overvoltage analysis model of UHVDC transmission project was established in EMTDC/PSCAD. Based on simulation results

the relationship among the amplitude of internal overvoltage

the amplitude and the gradient of current flow through the electrode line was analyzed. It is revealed that the severe fluctuating of unbalance current in electrode lines during faults or conversion of operation mode is the main cause for internal overvoltage. The internal overvoltage is affected by the fault type

the fault position

and the length of electrode line. And its amplitude reduces linearly along the electrode line. Moreover

the optimized configuration method of insulation level of electrode line was discussed. A reasonable and economic method to determine the scales of parallel gaps in electrode line was proposed. At last

a series of suggestions on the design and maintain of electrode line was presented.

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Related Author

JIANG Kaihua

WANG Shaohua

LI Te

CAO Junping

YANG Yong

YE Haoliang

WANG Jufeng

LIU Jinlian

Related Institution

国网浙江省电力有限公司电力科学研究院

College of Electrical Engineering, Guangxi University

College of Mechanical and Electrical Engineering, Wuyi University

State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University

China Electric Power Research Institute

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