| 考虑变压器励磁涌流影响的保护整定 |
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| 引用本文： | 范瑾. 考虑变压器励磁涌流影响的保护整定[J]. 现代电子技术, 2011, 34(14): 191-194 |
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| 作者姓名： | 范瑾 |
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| 作者单位： | 西安邮电学院,陕西,西,安710061 |
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| 摘 要： | 在大型变压器空载冲击过程中，由于励磁涌流和负序电压的存在，如果定值整定不得当，会导致差动保护，复压过流保护等误动作，影响设备的正常运行。为了保证定值整定的正确性，在此通过对励磁涌流产生的原因和特点进行理论分析，结合变压器冲击过程中实际数据以及大型变压器冲击过程中由于定值整定不舍理造成保护误动作的实例，对变压器冲击过程中相关定值整定的原则进行了探讨。在定值的整定过程中要考虑励磁涌流的幅值、谐波含量和衰减时间以及负序电压的幅值和衰减时间的影响。
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| 关 键 词： | 励磁涌流 复压过流保护 定值整定 差动保护 变压器冲击 |
Protection Setting Value Calculation Considering Influence of Transformer Excitation Inrush Current |
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| FAN Jin. Protection Setting Value Calculation Considering Influence of Transformer Excitation Inrush Current[J]. Modern Electronic Technique, 2011, 34(14): 191-194 |
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| Authors: | FAN Jin |
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| Affiliation: | FAN Jin(Xi'an Institute of Posts and Telecommunuications,Xi'an 7100761,China) |
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| Abstract: | In no-load impact process of large transformers,the excitation inrush current and negative sequence voltage can cause protection misoperation of differential protection and complex pressure over-current protection if the setting value calculation is not reasonable.In order to ensure the correctness of protection setting value calculation,the principle of the protection setting value calculation is discussed on the basis of the theoretical analysis of causes and characteristics of the excitation inrush curre... |
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| Keywords: | excitation inrush current complex pressure over-current protection protection setting value calculation differential protection transformer impact |
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