Investigation on Measurement Method of Transformer Winding AC Resistance by Using Auxiliary Winding

被引：0
作者：
Wang R. [1 ]
Xiao F. [1 ]
Zhao Z. [1 ]
Yang G. [1 ]
Zhang X. [1 ]
机构：
[1] National Key Laboratory of Science and Technology on Vessel Integrated Power System, Naval University of Engineering, Wuhan
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2019年 / 34卷 / 02期
关键词：
AC resistance; Auxiliary winding; Measurement; Medium frequency transformer;
D O I：
10.19595/j.cnki.1000-6753.tces.180159
中图分类号：
学科分类号：
摘要：
The measurement of winding AC resistance is important for the copper loss evaluation of medium-frequency transformer (MFT) in the power electronic system. The common method is short-circuit test using impedance analyzer or LCR meter, which can only obtain the total AC resistance of primary and secondary winding. The measurement method to separate the AC resistance of the two winding is presented in this paper. An impedance coupling analytical model of MFT with auxiliary winding is developed, and the effect of coupling coefficient of primary winding between auxiliary winding and secondary winding on measurement results of AC resistance is analyzed. Finally, an online symmetrical coupling auxiliary winding measurement method is developed based on foregoing analytically determined information to significantly increase measurement accuracy. The developed method is applied in a 2kW MFT, where the accuracy of online measured results is validated by Dowell model, finite-element analysis predicted results and standard short-circuit test. © 2019, Electrical Technology Press Co. Ltd. All right reserved.
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页码：245 / 254
页数：9
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