Three‐phase interleaved high step‐up bidirectional DC–DCconverter. Issue 12 (2nd July 2020)

• Record Type: Journal Article
• Authors: Wang, Fan; Wang, Yubin; Su, Bing; Teng, Changpeng
• Is Part Of: IET power electronics. Volume 13:Issue 12(2020)
• Page Start: 2469
• Page End: 2480
• Publication Date: 2020-07-02
• Subjects: Bode diagrams -- switching convertors -- DC‐DC power convertors -- closed loop systems -- power capacitors -- voltage control; interleaved switching strategy -- closed dual‐loop control -- current‐sharing ability analysis -- DC bus prototype -- three‐phase interleaved boost converter -- voltage conversion ratio -- high step‐up bidirectional DC–DC converter -- voltage gain -- low output voltage ripple -- automatic voltage‐balancing -- power capacitors -- duty cycle range -- output voltage regulation -- bode diagram -- steady‐state analysis -- power 300.0 W -- voltage 24.0 V -- voltage 230.0 V; Power electronics -- Periodicals; 621.31705
• DOI: 10.1049/iet-pel.2020.0295
• Languages: English
• ISSNs: 1755-4535

Abstract

Abstract : A three‐phase interleaved high step‐up bidirectional DC–DC converter is proposed, which can achieve three times the voltage gain of the traditional three‐phase interleaved boost converter only by adding two capacitors. The proposed converter has the characteristics of low switch voltage and current stresses, low output voltage ripple, automatic voltage‐balancing and current‐sharing abilities. Compared with the traditional interleaved switching strategy, a 180° interleaved switching strategy is proposed, which is more suitable for the proposed converter by widening the working duty cycle range. Closed dual‐loop control is used to regulate the output voltage of the converter. The parameter determining the method of the closed‐loop controllers based on the Bode diagram is described in order to control the high‐order converter. Operating principle, modelling, steady‐state analysis, voltage‐balancing and current‐sharing ability analysis and closed‐loop design of the converter are studied in more detail. Finally, experimental verification and efficiency measurements are implemented by a 300 W, 24 V input to 230 V DC bus prototype, which proved that the proposed converter is more suitable than the traditional three‐phase interleaved boost converter for some applications where requiring about six to ten times the voltage conversion ratio.