一种中压绝缘大功率中频变压器的优化设计方法

doi:10.19595/j.cnki.1000-6753.tces.211799

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Abstract The medium-voltage insulated high-power medium-frequency transformer (MFT) used in photovoltaic grid-connected systems not only requires a large insulation distance between the high and low voltage side windings, but also needs to be poured with thermal-protective insulating materials inside. However, it can lead to problems such as serious electromagnetic interference and difficult heat dissipation in the MFT. Therefore, this paper proposes an MFT optimal design method that fully considers the core size, winding wire diameter and winding arrangement structure. In this method, the core volume is determined by the area product (AP) method, and then the loss of the MFT is minimized by free variable scanning. Based on the finite element simulation software, it is verified that the optimized design method will also reduce the electromagnetic interference area around the transformer. Finally, a 200kW/30kHz MFT was designed through the optimized design method, and a prototype was made. The comparison between theory and experiment verifies the optimized design method.

Key words： High-power medium-frequency transformer insulation area product method loss modeling optimal design electromagnetic interference finite element simulation

Received: 04 November 2021

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TM432

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	Wang Jianing
	Zou Qiang
	Hu Jiawen
	Pei Wei
	Zhao Yushun

Cite this article:

Wang Jianing,Zou Qiang,Hu Jiawen等. An Optimal Design Method for Medium-Voltage Insulated High-Power Medium-Frequency Transformer[J]. Transactions of China Electrotechnical Society, 2022, 37(12): 3048-3060.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.211799 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I12/3048

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