Study on the Influence of Operation Modes of Renewable Energy into the Power Grid near Grounding Electrode of UHVDC Transmission on the Distribution of DC Bias Current

XIAO Mian; WU Chuanqi; LI Hongbing; CHEN Li; LI Jinbin; RUAN Ling

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Study on the Influence of Operation Modes of Renewable Energy into the Power Grid near Grounding Electrode of UHVDC Transmission on the Distribution of DC Bias Current

更新时间：2025-07-16

- Study on the Influence of Operation Modes of Renewable Energy into the Power Grid near Grounding Electrode of UHVDC Transmission on the Distribution of DC Bias Current
- Moren Journal (2025)
- 作者机构：
  
  1.湖北大地杂散电流与能源装备安全野外科学观测研究站,湖北省武汉市430077
  2.国网湖北省电力有限公司电力科学研究院,湖北省武汉市430077
  3.国家电网有限公司高压电气设备现场试验与评估技术实验室,湖北省武汉市430077
  4.国网湖北省电力有限公司,湖北省武汉市430040
- 作者简介：
- 基金信息：
  
  Science and Technology Project of SGCC(5200-202356475A-3-2-ZN)
- DOI：
  CLC：
- Received：25 February 2025，
  
  Revised：05 May 2025，
  
  Accepted：14 May 2025，
- 稿件说明：
移动端阅览
XIAO Mian, WU Chuanqi, LI Hongbing, et al. Study on the Influence of Operation Modes of Renewable Energy into the Power Grid near Grounding Electrode of UHVDC Transmission on the Distribution of DC Bias Current[J/OL]. Moren journal, 2025.
DOI：

XIAO Mian, WU Chuanqi, LI Hongbing, et al. Study on the Influence of Operation Modes of Renewable Energy into the Power Grid near Grounding Electrode of UHVDC Transmission on the Distribution of DC Bias Current[J/OL]. Moren journal, 2025. DOI：

摘要

湖北境内有多条直流外送通道，运行以来多次发生单极闭锁，直流偏磁的风险评估和防御治理问题突出。武汉特高压换流站的接地极位于随州广水岗上湾，接地极近区新能源站分布密集、数量众多，新能源接入电网方式对随州地区直流偏磁分布影响显著。本文开展随州地区新能源站多种接入电网方式下直流偏磁分析研究，获得了不同运行工况下新能源站和枢纽变电站直流偏磁电流分布规律，首次提出从优化电网调度运行方式的角度来治理直流偏磁问题。结果表明，金山风电场、吉阳光伏场对随州永阳和景星供区直流偏磁分布的影响比其他新能源站显著。根据分析，建议安排金山、吉阳、寿山新能源站通过永阳站接入主网，乐城山、京桥新能源站通过景星站接入主网，该运行工况下随州地区各新能源站和枢纽变电站整体直流偏磁风险最小。研究结论对于指导随州地区直流偏磁防御治理具有一定参考价值。

Abstract

There are many DC transmission channels in Hubei. The single pole blocking fault has occurred many times

and the risk of DC bias is prominent. The grounding electrode of Wuhan UHV station is located in Suizhou Guangshui where the new energy stations are numerous. The operation modes of renewable energy into the power grid have a significant impact on the DC bias in Suizhou. This paper carries out an analysis of the DC bias in Suizhou under a variety of operation modes

and obtains the DC bias current distribution. It is proposed for the first time to suppress the DC bias from the perspective of optimizing the power grid dispatching operation mode. The results show that the impact of Jinshan wind farm and Jiyang photovoltaic farm on the DC bias distribution of Suizhou Yongyang and Jingxing is more significant. According to the analysis

it is recommended to arrange Jinshan

Jiyang and Shoushan new energy stations to connect to the power grid through Yongyang station

and Lechengshan and Jingqiao new energy stations to connect to the power grid through Jingxing station

which minimizes the overall DC bias risk in Suizhou. The conclusion has certain reference value for guiding the DC bias suppression in Suizhou area.

关键词

Keywords

references

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