| 电流互感器星-三角变换对传变和应涌流的影响 |
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| 引用本文： | 束洪春,孙向飞.电流互感器星-三角变换对传变和应涌流的影响[J].电工标准与质量,2008(4). |
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| 作者姓名： | 束洪春 孙向飞 |
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| 作者单位： | 昆明理工大学电力工程学院; |
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| 基金项目： | 国家自然科学基金(90610024,50467002,50347026); 云南省自然科学基金重点项目(2005F0005Z) |
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| 摘 要： | 分析和应涌流条件下电流互感器(TA)星-三角变换对变压器差动保护中差流的二次谐波含量的影响。若两相和应涌流方向相同,差动电流的二次谐波含量介于两相和应涌流二次谐波含量之间;若两相和应涌流方向相反,差动电流的二次谐波含量将可能小于两相和应涌流二次谐波含量,可能导致差动保护的二次谐波制动方法失效.仿真分析结果验证了该电流互感器接线方式对传变和应涌流的影响.
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| 关 键 词： | 变压器 和应涌流 差动保护 |
Wye-delta current transform effect on sympathetic inrush transfer |
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| SHU Hong-chun,SUN Xiang-fei.Wye-delta current transform effect on sympathetic inrush transfer[J].Journal of Changsha University of Electric Power(Natural Science Edition),2008(4). |
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| Authors: | SHU Hong-chun SUN Xiang-fei |
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| Affiliation: | SHU Hong-chun,SUN Xiang-fei(College of Electric Power Engineering,Kunming University of Science , Technology,Kunming 650051,China) |
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| Abstract: | The TA Y-delta transform effect on the second harmonic proportion in the differential current of transformer differential relays is analyzed in the condition of sympathetic inrush.If the two phase sympathetic inrushs' direction is same,the second harmonic proportion in the differential current is between these in the two phase inrush currents.If the two phase sympathetic inrushs' direction is reverse,the second harmonic proportion in differential current is less than that in each phase sympathetic inrush cu... |
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| Keywords: | transformer sympathetic inrush differential protection |
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