高功率密度SiC静止无功补偿器强迫风冷散热综合建模及优化设计方法

doi:10.19595/j.cnki.1000-6753.tces.200821

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Abstract Base on a novel characteristic length scale (the square root of cross-sectional), a comprehensive thermal model for the typical forced air cooling system of power electronic devices was proposed integrating heat conduction, convection heat transfer and fluid mechanics theories. In order to improve the accuracy and efficiency of the thermal design, an optimized design method for the optimal volume was proposed for the high-power and high-density power electronic device. Taking a 380V/50kvar high power density static var generator (SVG) as an example, compared with the experimental results, the average thermal resistance error of the comprehensive thermal model is within 7%, that is, the corresponding surface temperature rise is within 1.3℃ when SVG is running at full load. The accuracy of the comprehensive thermal model is improved by 62% compared with the traditional thermal models. Consenquently, the demention volume of the cooling part designed based on the proposed method is 4.03L, which is 30% smaller than the volume of 5.7L designed by the traditional methods.

Key words： Thermal design thermal model forced air cooling static var generator (SVG)

Received: 09 July 2020

PACS:	TM762
	O551

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	Lin Hongyi
	Wu Liang
	Guo Xiao
	Chen Guozhu

Cite this article:

Lin Hongyi,Wu Liang,Guo Xiao等. A Comprehensive Model of Forced Air Cooling and Optimal Design Method of High Power Density SiC-Static Var Generator[J]. Transactions of China Electrotechnical Society, 2021, 36(16): 3446-3456.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.200821 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I16/3446

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