| 主变平衡绕组故障引起差动保护动作的分析 |
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| 引用本文： | 鲍有理,刘春光. 主变平衡绕组故障引起差动保护动作的分析[J]. 江苏电机工程, 2011, 30(2): 20-21 |
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| 作者姓名： | 鲍有理 刘春光 |
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| 作者单位： | 1. 无锡供电公司,江苏,无锡,214061
2. 江阴供电公司,江苏,江阴,214000 |
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| 摘 要： | 主变平衡绕组的引出桩头发生两相短路导致主变差动保护动作,从波形上看故障切除过程中平衡绕的桩头由两相短路发展为三相短路.简单介绍了主变平衡绕组的作用、详细介绍现场故障检查以及对差动保护动作波形的分析,还从理论角度分析了YO/△-11联结组别的主变三角形侧两相短路时星形侧三相绕组上流过的故障电流的幅值及角度,其分析结果和实...
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| 关 键 词： | 主变平衡绕组 差动保护 两相短路 向量分析 |
Analysis of Differential Protection Caused by Main Transformer Shielding Coils Fault |
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| BAO You-li,LIU Chun-guang. Analysis of Differential Protection Caused by Main Transformer Shielding Coils Fault[J]. Jiangsu Electrical Engineering, 2011, 30(2): 20-21 |
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| Authors: | BAO You-li LIU Chun-guang |
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| Affiliation: | BAO You-li1,LIU Chun-guang2(1.Wuxi Power Supply Company,Wuxi 214061,China,2.Jiangyin Power Supply Company,Jiangyin 214400,China) |
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| Abstract: | The differential protection can get to work caused by two-phase short circuit fault happened in the pile head of shielding coils.From the waveform during the fault clearing process,the two-phase short circuit fault was changing to the three-phase short circuit.The role of the main transformer shielding coils is introduced,and the on-site failure checking as well as the analysis of differential protection waveforms are presented in detail.The magnitude and angle of fault current flowing through the three-pha... |
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| Keywords: | main transformer shielding coils differential protection two-phase short circuit vector analysis |
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