Modeling and Validation of Stray-Field Loss in Laminated Magnetic Shield of Transformer under Harmonics and DC Bias
Zhang Changgeng1, Tian Yakun1, Li Yongjian1, Li Yating1, Du Zhenbin2, Cheng Zhiguang2, Yang Qingxin1
1. State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology Tianjin 300130 China; 2. Institute of Power Transmission and Transformation Technology Baobian Electric Baoding 071056 China
Abstract：In order to study the stray-field loss in laminated magnetic shield of transformer under harmonics and DC bias, an improved model was proposed based on TEAM P21(Testing Electromagnetic Analysis Methods Problem 21) family (V.2009). The turn number, the cross section of exciting coil, and the size of magnetic shield sheets were increased. A measuring system of stray-field loss in laminated magnetic shield of transformer was designed. The corresponding measuring method of stray-field loss under harmonics and DC bias was proposed. Magnetic properties of GO silicon steel sheet were measured under complex excitations of harmonics and DC bias, which are essential to numerical modeling and simulation correctly. The calculated and measured stray flux density and stray-field loss in laminated magnetic shield were practically in good agreement, which verified the effectiveness of the numerical simulation. The distribution of stray-field loss was discussed and the results would be beneficial to the design of magnetic shield of transformer and improve the reliability of electromagnetic apparatus.
张长庚, 田亚坤, 李永建, 利雅婷, 杜振斌, 程志光, 杨庆新. 谐波及直流偏磁下变压器叠片式磁屏蔽杂散损耗模拟与验证[J]. 电工技术学报, 2022, 37(15): 3733-3742.
Zhang Changgeng, Tian Yakun, Li Yongjian, Li Yating, Du Zhenbin, Cheng Zhiguang, Yang Qingxin. Modeling and Validation of Stray-Field Loss in Laminated Magnetic Shield of Transformer under Harmonics and DC Bias. Transactions of China Electrotechnical Society, 2022, 37(15): 3733-3742.
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2022, Vol. 37 
