Study on the DC Magnetic Bias of the ±1100 kV Changji Converter Station and the ±800 kV Tianshan Converter Station

SUN Bing; LUO Zhongyou; YU Yongjun; WU Weili; LIU Jun; ZHANG Bin

doi:10.13296/j.1001-1609.hva.2020.08.019

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Study on the DC Magnetic Bias of the ±1100 kV Changji Converter Station and the ±800 kV Tianshan Converter Station

更新时间：2025-04-26

- Study on the DC Magnetic Bias of the ±1100 kV Changji Converter Station and the ±800 kV Tianshan Converter Station
- High VoltageApparatus Vol. 56, Issue 8, Pages: 121-127(2020)
- 作者机构：
  
  1. 国网新疆电力有限公司电力科学研究院
  2. 西安科技大学电气与控制工程学院
  3. 安徽正广电电力技术有限公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.08.019
  CLC： TM721.1
- Published：2020
- 稿件说明：
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[1]孙冰,罗忠游,于永军,吴伟丽,刘俊,张斌.±1100 kV昌吉换流站与±800 kV天山换流站共同作用的直流偏磁问题研究[J].高压电器,2020,56(08):121-127.

SUN Bing, LUO Zhongyou, YU Yongjun, et al. Study on the DC Magnetic Bias of the ±1100 kV Changji Converter Station and the ±800 kV Tianshan Converter Station[J]. High voltageapparatus, 2020, 56(8): 121-127.
[1]孙冰,罗忠游,于永军,吴伟丽,刘俊,张斌.±1100 kV昌吉换流站与±800 kV天山换流站共同作用的直流偏磁问题研究[J].高压电器,2020,56(08):121-127. DOI： 10.13296/j.1001-1609.hva.2020.08.019.

SUN Bing, LUO Zhongyou, YU Yongjun, et al. Study on the DC Magnetic Bias of the ±1100 kV Changji Converter Station and the ±800 kV Tianshan Converter Station[J]. High voltageapparatus, 2020, 56(8): 121-127. DOI： 10.13296/j.1001-1609.hva.2020.08.019.

摘要

针对±800 kV天山—中洲特高压直流输电工程和±1 100 kV昌吉—古泉特高压直流输电工程同时以单极大地方式运行时

新疆电网内厂站面临的变压器直流偏磁风险

提出了研究方法和应对策略:首先

利用电磁测深对两接地极周边土壤进行了冬夏两季实测

在实测的土壤电阻率基础上构建了两接地极同时作用下的电网直流电流分布模型;其次

对新疆电网直流偏磁风险进行仿真计算分析

发现不同季节土壤电阻率不同

且冬季直流偏磁风险较大

两双接地极同时注入直流时

原本没有直流偏磁风险的厂站也会存在风险;最后

提出了直流偏磁治理的防范方法与策略。文中方法和研究结论可为同类工程提供参考

具有一定的理论和实际的借鉴意义。

Abstract

In view of the transformer DC bias risk in the power plants and stations in Xinjiang Power Grid when the ±800 kV Tianshan-Zhongzhou UHVDC transmission project and the ±1 100 kV Changji-Guquan UHVDC transmission project operate simultaneously in monopolar ground-return mode

the soil around the two grounding poles is measured by electromagnetic sounding device in winter and summer

and on the basis of the measured resistivity data

a DC current distribution model of power grid under simultaneous action of two grounding poles is constructed. Then

the DC magnetic bias risk of Xinjiang Power Grid is simulated and analyzed

and the results show that the soil resistivity is different in different seasons

and the DC magnetic bias risk is higher in winter. When two grounding poles are injected with DC at the same time

the plants and stations without DC magnetic bias risk will have the risk. In addition

some countermeasures to the DC magnetic bias are offered.

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