| 空投变压器差动保护动作分析 |
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| 引用本文： | 焦宇峰,万康鸿. 空投变压器差动保护动作分析[J]. 电网与水力发电进展, 2010, 26(2): 36-39 |
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| 作者姓名： | 焦宇峰 万康鸿 |
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| 作者单位： | 西北电网有限公司西安输变电运行公司，西安 710048;西北电网有限公司西安输变电运行公司，西安 710048 |
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| 摘 要： | 分析了2007年4月29日科技园变空投变压器时，主变差动保护误动作过程。得出主变差动保护误动作主要是空投变压器产生的二次谐波占基波比例小于定值中的制动系数（0．17），导致A、B相闭锁条件开放，差动出口跳闸。根据误动原因提出应采用波形对称原理的保护装置。
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| 关 键 词： | 变压器 励磁涌流 差动保护 |
Analysis of Differential Protection Operation Caused by No-Load Transformer |
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| JIAO Yu-feng and WAN Kang-hong. Analysis of Differential Protection Operation Caused by No-Load Transformer[J]. Advance of Power System & Hydroelectric Engineering, 2010, 26(2): 36-39 |
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| Authors: | JIAO Yu-feng and WAN Kang-hong |
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| Affiliation: | (Xi＇an Power Transmission and Transformation Operation Company, Xi＇an 710048, Shaanxi Province, China) |
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| Abstract: | This paper introduces the situation of the differential protection maloperation for no-load transformer in Science and Technology Parks power substation on April 29,2007.A conclusion has reached that the main reason for differential protection maloperation of main transformer is mainly due to malfunction resulting from second-harmonic for no-load transformer of fundamental proportion accounted for less than the fixed value of the braking coefficient(0.17),leading to open the locking conditions for phase A a... |
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| Keywords: | transformer magnetizing inrush current differe-ntial protection |
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