Experimental Study and Calculation Analysis of Excitation-vibration Characteristics of Transformer Under Interharmonic Excitation

被引：0
|
作者：
Li H. [1 ]
Li J. [1 ]
Yang G. [1 ]
机构：
[1] Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense, North China Electric Power University, Baoding
来源：
Gaodianya Jishu/High Voltage Engineering | 2022年 / 48卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Excitation characteristic; Interharmonic; Magnetostriction; Multi-field coupling; Vibration characteristic;
D O I：
10.13336/j.1003-6520.hve.20211596
中图分类号：
学科分类号：
摘要：
Under the excitation of interharmonic, the electromagnetic and vibration characteristics of power transformer will significantly change compared with those under power frequency conditions. In this paper, the basic magnetization and magnetostriction characteristics of oriented electrical steel are measured, and its magnetostriction curves are obtained, which are fitted based on the empirical formula of magnetostriction. Furthermore, an experimental platform with the capacity to generate arbitrary waveform is built, which can be utilized to analyze the vibration and excitation characteristics of electrical transformer core. A three-dimensional coupled model of multi physical field with circuit, magnetic field, and mechanical field of transformer core is established based on the finite element method, and the calculated results are analyzed and compared with the measured results. Meanwhile, the influence laws of interharmonic excitation on transformer excitation current, flux and core vibration under different conditions are analyzed. The results of measurement and calculation show that the excitation and vibration characteristics of transformer with interharmonic excitation are periodic, and the influence of low frequency interharmonics below 10 Hz on transformer is remarkable, so it should be prevented. The research results can provide references for the relevant research on the vibration of the iron core of the press. © 2022, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：1781 / 1790
页数：9
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