| 牛从直流翁源接地极入地电流对周边变压器直流偏磁的影响 |
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| 引用本文： | 蔡汉生,胡上茂,刘刚,李锐海,邹林,王晓毛. 牛从直流翁源接地极入地电流对周边变压器直流偏磁的影响[J]. 南方电网技术, 2015, 9(7): 11-15 |
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| 作者姓名： | 蔡汉生 胡上茂 刘刚 李锐海 邹林 王晓毛 |
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| 作者单位： | 南方电网科学研究院，广州510080,南方电网科学研究院，广州510080,南方电网科学研究院，广州510080,南方电网科学研究院，广州510080,南方电网科学研究院，广州510080,广东电网有限责任公司电力科学研究院，广州510080 |
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| 摘 要： | 根据牛从直流受端翁源接地极周边变电站情况,对牛从直流入地电流进行了实测和分析,并对牛从直流入地电流对周边交流变压器直流偏磁的影响进行了详细的仿真计算。结果表明,翁江站变压器220 k V侧中性点均不接地或装设隔直装置可减小流入交流系统的直流偏磁电流;翁江站110 k V供电片区优化接地方式,选择官渡、回龙站中性点接地,对交流系统直流偏磁的影响最小。
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| 关 键 词： | 牛从直流；接地极；入地电流；变压器；直流偏磁 |
| 收稿时间： | 2015-02-03 |
Influence of Wengyuan DC Grounding Electrode Current of Niuzhai-Conghua HVDC Project on DC Bias of Adjacent Power Transformers |
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| CAI Hansheng,HU Shangmao,LIU Gang,LI Ruihai,ZOU Lin and WANG Xiaomao. Influence of Wengyuan DC Grounding Electrode Current of Niuzhai-Conghua HVDC Project on DC Bias of Adjacent Power Transformers[J]. Southern Power System Technology, 2015, 9(7): 11-15 |
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| Authors: | CAI Hansheng HU Shangmao LIU Gang LI Ruihai ZOU Lin WANG Xiaomao |
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| Affiliation: | Electric Power Research Institute, CSG, Guangzhou 510080, China,Electric Power Research Institute, CSG, Guangzhou 510080, China,Electric Power Research Institute, CSG, Guangzhou 510080, China,Electric Power Research Institute, CSG, Guangzhou 510080, China,Electric Power Research Institute, CSG, Guangzhou 510080, China and Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou 510080, China |
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| Abstract: | According to the surrounding substation characteristics of Wengyuan DC grounding electrode of Niuzhai-Conghua HVDC Project, experiments of DC grounding electrode current distribution are carried out, and then the influence of the DC grounding electrode current on DC bias of power transformers is calculated. The results show that the 220 kV side neutral point of transformer in Wengjiang Station ungrounded or installing blocking device can reduce the bias current flowing into the AC system, and the influence of AC system can also be reduced to minimum by making the neutral point of transformer in Guandu and Huilong Station grounding and others neutral point of transformer in the Wengjiang Station power supply area ungrounding. |
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| Keywords: | Niuzhai-Conghua HVDC project grounding electrode transformers DC bias |
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