| 轨道交通对电力变压器不利影响的分析与防治 |
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| 引用本文： | 潘卓洪,张宣,严雅琳,王玲,马明.轨道交通对电力变压器不利影响的分析与防治[J].电力科学与工程,2020(1):35-40. |
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| 作者姓名： | 潘卓洪 张宣 严雅琳 王玲 马明 |
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| 作者单位： | 河北省输变电设备安全防御重点实验室（华北电力大学）;广东电网有限责任公司电力科学研究院;电能质量重点实验室（广东电网有限责任公司） |
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| 基金项目： | 国家自然科学基金项目(51607129);中国南方电网有限责任公司科技项目(GDKJM00000009)。 |
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| 摘 要： | 随着轨道交通事业的迅速发展,轨道系统的杂散电流对城市电力变压器造成了不利的影响。从入侵原理和入侵源头分类、现场监测和数据分析,以及直流偏磁治理方案等几个方面进行综合论述。现场监测数据表明,杂散电流与直流输电大地返回电流导致的直流偏磁危害不同,中性点出现了高次谐波(特别是13次谐波)。采用变压器中性点串联大电容的方法可以有效抑制杂散电流导致的直流偏磁危害,为轨道交通对电力变压器不利影响的分析与防治提供了有效参考。
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| 关 键 词： | 轨道交通 电力变压器 杂散电流 电容隔直装置 |
Analysis and Mitigation of Adverse Effects on Power Transformers Against Metro Systems |
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| PAN Zhuohong,ZHANG Xuan,YAN Yalin,WANG Ling,MA Ming.Analysis and Mitigation of Adverse Effects on Power Transformers Against Metro Systems[J].Power Science and Engineering,2020(1):35-40. |
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| Authors: | PAN Zhuohong ZHANG Xuan YAN Yalin WANG Ling MA Ming |
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| Affiliation: | (Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense,North China Electric Power University,Baoding 071003,China;Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,China;Key Laboratory of Power Quality of Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,China) |
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| Abstract: | With the rapid development of metro systems in China,the stray current has induced adverse impact on city power transformers.This paper makes a comprehensive expound on the invasion principle,the classification of the invasion source,on-site monitoring,the analysis of data,and the DC magnetic bias prevention measurements.On-site monitoring data shows that the stray current hazard is different from the DC magnetic bias hazard caused by the DC transmission’s ground return current,and there is the higher harmonic at the neutral point especially for the 13th harmonic.The method of using the large capacitor blocking device in series with the neutral point of the transformer can suppress the DC magnetic bias hazard caused by the stray current effectively.This paper provides an effective reference for the analysis and prevention of the adverse effects of metro system on power transformers. |
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| Keywords: | metro system power transformer stray current capacitor blocking device |
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