Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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基于磁化曲线的分段式变压器励磁电感等效方法研究

来源:电工电气发布时间:2016-09-20 13:20 浏览次数:16
基于磁化曲线的分段式变压器励磁电感等效方法研究
 
董宇1,段强2,董韬3,于雯斐1
(1 郑州轻工业学院 电气信息工程学院,河南 郑州 450002;
2 国网新乡供电公司,河南 新乡 453000;3 国网邯郸供电公司,河北 邯郸 056000)
 
    摘 要:提出一种基于磁化曲线的分段式变压器励磁电感的等效方法。分析了传统线性化基本磁化曲线中变压器励磁电感等效为线性定值的弊端;采用分段表达式方法,根据每段不同特点设置不同的数学表达式,找到励磁电感随时间的变化关系。仿真结果表明,该法准确地描述了变压器饱和时励磁电感的变化情况,为变压器励磁涌流识别及差动保护原理的拓展提供了参考。
    关键词:磁化曲线;励磁电感;分段表达;变压器
    中图分类号:TM401+.1   文献标识码:A   文章编号:1007-3175(2016)09-0016-03
 
Research of Segmentary Transformer Excitation Inductance Equivalent Method Based on Magnetizing Curve
 
DONG Yu1, DUAN Qiang2, DONG Tao3, YU Wen-fei1
(1 College of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China;
2 State Grid Xinxiang Power Supply Company, Xinxiang 453000, China;
3 State Grid Handan Power Supply Company, Handan 056000, China)
 
    Abstract: This paper proposed a segmentary transformer excitation inductance equivalent method based on the magnetization curves. Analysis was made to the disadvantages that the transformer excitation inductance was equivalent to the fixed linear constant value in the traditional linear basic magnetization curves. According to the characteristics of each different mathematical expression, with the segmentary expression method, this paper revealed the relationship between excitation inductance and the time. The simulation results show that this method could describe the transformer magnetization curves accurately, to provide references for the transformer excitation surge current and the differential protection principle expansion.
    Key words: magnetizing curve; excitation inductance; subsection expression; transformer
 
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