| 多回直流输电系统地下电流场对长三角地区电网的影响 |
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| 引用本文： | 袁春峰,周行星,顾承昱,李红雷.多回直流输电系统地下电流场对长三角地区电网的影响[J].华东电力,2008,36(11). |
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| 作者姓名： | 袁春峰 周行星 顾承昱 李红雷 |
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| 作者单位： | 1. 上海市电力公司,上海,200120
2. 华东电力试验研究院有限公司,上海,200437 |
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| 摘 要： | 直流输电线路在系统调试或发生故障情况下,会处于单极大地回路运行方式.从而可能造成部分交流输电系统中的变压器处于直流偏磁状态.针对长三角地区电网随后将有多条特高压直流落点的情况,提出了分析直流单极大地运行时流过交流系统的直流电流分布的数值计算方法,运用该计算方法分析了本区域直流线路以大地为回路运行时,对接地极周围500 kV及220 kV电网可能造成的影响,并提出了缓解直流偏磁的措施.
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| 关 键 词： | 直流输电 直流接地极 单极大地回线方式 变压器 直流偏磁 长三角 |
Impacts of underground current fields of multi-circuit HVDC systems on grids of Yangtze River Delta |
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| YUAN Chun-feng,ZHOU Xing-xing,GU Cheng-yu,LI Hong-lei.Impacts of underground current fields of multi-circuit HVDC systems on grids of Yangtze River Delta[J].East China Electric Power,2008,36(11). |
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| Authors: | YUAN Chun-feng ZHOU Xing-xing GU Cheng-yu LI Hong-lei |
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| Affiliation: | YUAN Chun-feng1,ZHOU Xing-xing2,GU Cheng-yu2,LI Hong-lei2(1.Shanghai Municipal Electric Power Company,Shanghai 200120,China,2.East China Electric Power Test & Research Institute Co.,Ltd.,Shanghai 200437,China) |
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| Abstract: | The HVDC system may operate in the monopolar ground circuit operation mode during debugging or failure.If the ground return current of the HVDC system is large enough,some transformers of the AC system may suffer DC magnetic bias.In the future,several UHVDC lines will be constructed in the Yangtze River Delta area,to solve the problem,a numerical method is proposed to calculate the DC current distribution in 500 kV and 220 kV AC power systems in case of monopolar ground circuit operation.Methods for allevia... |
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| Keywords: | HVDC DC earthing electrode monopolar ground circuit operation mode transformer DC magnetic bias Yangtze River Delta |
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