中频变压器并联绕组环流的频率特性及其对等效电阻的影响分析

doi:10.19595/j.cnki.1000-6753.tces.L80437

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Abstract The primary-series secondary-parallel (PSSP) structure is widely applied in power transformer to optimize the current density of secondary winding. When the operating frequency of PSSP transformer is set above to be medium frequency, the circulating current often occurs in the parallel secondary windings. A coupling analytical model is developed to analyze the circulating current. The corner frequency is used to characterize the extreme point of the circulating current proportional coefficient. Then, the investigation on the effects of asymmetric coupling and resistance on equivalent winding resistance is presented. The accuracy of developed analytical model and corner-frequency formulas for the corner frequency is validated by measured results.

Key words： Medium-frequency transformer equivalent resistance asymmetric winding corner frequency

Received: 30 June 2018 Published: 05 March 2020

PACS:

TM432

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	Wang Ruitian
	Zhao Zhihua
	Xiao Fei
	Zhang Xinsheng
	Yang Guorun

Cite this article:

Wang Ruitian,Zhao Zhihua,Xiao Fei等. Investigation of Frequency Characteristics and Effect on Winding Equivalent Resistance of Circulating Current in Medium-Frequency Transformer[J]. Transactions of China Electrotechnical Society, 2020, 35(zk1): 251-258.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L80437 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/Izk1/251

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