Operation Scheme of Unconventional Earth Electrodes in HVDC Transmission Project

Huifan XIE; Bo TAN; Hongtao LIU; Paihong LIU; Yang SONG; Guanghu XU

doi:10.7500/AEPS20200118002

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Operation Scheme of Unconventional Earth Electrodes in HVDC Transmission Project

Application Research | 更新时间：2025-06-16

- Operation Scheme of Unconventional Earth Electrodes in HVDC Transmission Project
- Automation of Electric Power Systems Vol. 44, Issue 15, Pages: 120-126(2020)
- 作者机构：
  
  1. 中国南方电网电力调度控制中心，广东省广州市 510623
  2. 中国电力科学研究院有限公司(武汉），湖北省武汉市 430074
  3. 广东电网有限责任公司揭阳普宁供电局，广东省揭阳市 522000
  4. 中国南方电网超高压输电公司柳州局，广西壮族自治区柳州市 545006
- 作者简介：
- 基金信息：
  
  Abstract:
  In order to solve the bipolar commissioning problem of high voltage direct current (HVDC) transmission projects while the construction of conventional earth electrodes are not completed, the unconventional earth electrode operation schemes, including in-station deep electrodes and out-station simple electrodes, are introduced. Then the electrical performance of electrodes, human safety, electrode heating, DC bias of transformers and diverting potential are studied. The main conclusions are as follows: in-station deep electrode schemes are technically feasible, but isolating measures should be taken to avoid high induced DC potential of earthing grid endangering the safety of equipment and human, for out-station simple electrode schemes, the step voltage and electrode temperature rise requirements are difficult to meet in monopole operation mode. So unbalanced current control measures should be introduced to ensure the safety of equipment and human near electrodes.
  Foundation:This work is supported by National Natural Science Foundation of China;China Southern Power Grid Co., Ltd
- DOI：10.7500/AEPS20200118002
  CLC：
- Received：18 January 2020，
  
  Revised：2020-04-21，
  
  Published Online：28 May 2020，
  
  Published：10 August 2020
- 稿件说明：
移动端阅览
谢惠藩,谭波,刘洪涛等.高压直流输电工程非常规接地极运行方案[J].电力系统自动化,2020,44(15):120-126.

XIE Huifan,TAN Bo,LIU Hongtao,et al.Operation Scheme of Unconventional Earth Electrodes in HVDC Transmission Project[J].Automation of Electric Power Systems,2020,44(15):120-126.
谢惠藩,谭波,刘洪涛等.高压直流输电工程非常规接地极运行方案[J].电力系统自动化,2020,44(15):120-126. DOI： 10.7500/AEPS20200118002.

XIE Huifan,TAN Bo,LIU Hongtao,et al.Operation Scheme of Unconventional Earth Electrodes in HVDC Transmission Project[J].Automation of Electric Power Systems,2020,44(15):120-126. DOI： 10.7500/AEPS20200118002.

摘要

为解决高压直流输电工程常规接地极未能建成时直流双极投产问题，提出站内深井接地极和站外简易接地极的非常规接地极运行方案，并对接地极电气性能、人身安全、接地极发热、变压器直流偏磁和转移电位开展研究。主要结论如下：站内深井接地极方案具备技术可行性，但需采取隔离措施避免站内接地网感应较高的直流电位危及设备和人身安全；站外简易接地极方案在单极大地运行方式下跨步电压和接地极温升难以满足要求，应采取不平衡电流控制措施以保障接地极附近的设备和人身安全。

Abstract

In order to solve the bipolar commissioning problem of high voltage direct current (HVDC) transmission projects while the construction of conventional earth electrodes are not completed

the unconventional earth electrode operation schemes

including in-station deep electrodes and out-station simple electrodes

are introduced. Then the electrical performance of electrodes

human safety

electrode heating

DC bias of transformers and diverting potential are studied. The main conclusions are as follows: in-station deep electrode schemes are technically feasible

but isolating measures should be taken to avoid high induced DC potential of earthing grid endangering the safety of equipment and human， for out-station simple electrode schemes

the step voltage and electrode temperature rise requirements are difficult to meet in monopole operation mode. So unbalanced current control measures should be introduced to ensure the safety of equipment and human near electrodes.

关键词

Keywords

references

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