Analysis and Case Study of Transfer between Ground Return and Metallic Return in the HVDC Project

FENG Dong1; Song Tian-qi3; Yang Jie-min3; Zhang Nan1

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Analysis and Case Study of Transfer between Ground Return and Metallic Return in the HVDC Project

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- Analysis and Case Study of Transfer between Ground Return and Metallic Return in the HVDC Project
- High VoltageApparatus Vol. 45, Issue 2, Pages: 126-129(2009)
- 作者机构：
  
  1. 中国南方电网超高压输电公司检修试验中心
  2. 华南理工大学电力学院
  3. 中国南方电网超高压输电公司天生桥局
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM721.1
- Published：2009
- 稿件说明：
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[1]冯鸫,宋天奇,杨洁民,张楠.直流输电工程大地回线和金属回线转换过程及运行实例分析[J].高压电器,2009,45(02):126-129.

FENG Dong1, Song Tian-qi3, Yang Jie-min3, et al. Analysis and Case Study of Transfer between Ground Return and Metallic Return in the HVDC Project[J]. High voltageapparatus, 2009, 45(2): 126-129.
[1]冯鸫,宋天奇,杨洁民,张楠.直流输电工程大地回线和金属回线转换过程及运行实例分析[J].高压电器,2009,45(02):126-129. DOI：

FENG Dong1, Song Tian-qi3, Yang Jie-min3, et al. Analysis and Case Study of Transfer between Ground Return and Metallic Return in the HVDC Project[J]. High voltageapparatus, 2009, 45(2): 126-129. DOI：

摘要

笔者主要以贵广二回直流工程为例

首先介绍了大地回线和金属回线的转换原理及其过程

其次介绍了在调试和运行过程中导致大地回线和金属回线转换不成功的运行实例

然后分析了直流保护逻辑存在的缺陷所导致的金属回线向大地回线转换时MRTB、MRS频繁分合的情况。笔者就这一情况提出了相应的保护逻辑修改方法

并发现保护逻辑经修改后

金属回线/大地回线转换正常

在系统调试和实际运行中不再出现MRTB、MRS频繁分合的情况。

Abstract

Taking the Gui-GuangⅡ HVDC Project as example

this paper introduces both the principle and the process of the transfer between ground return and metallic return

discusses a case of unsuccessful transfer between GR and MR in this project

and analyzes the frequent switching on/off of the MRTB/MRS due to DC protection logic bugs during the transfer from MR to GR.Therefore

an approach to modify the DC protection logic is proposed.After the modification

the transfer between MR and GR becomes normal without frequent switching on/off of the MRTB/MRS during commissioning and operation of the HVDC system.

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Principle and Improvement of the Earth Electrode Overvoltage Protection for an HVDC Project

Related Author

FENG Dong1

LUO Hai-zhi3

YANG Jie-min4

GUO Qi5

Related Institution

Nanning Branch,EHV,China Southern Power Grid

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