一种交错并联双Buck全桥型双向并网逆变器

doi:10.19595/j.cnki.1000-6753.tces.L80617

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Abstract Based on the double-buck full-bridge converter topology, this paper proposes an interleaved parallel bidirectional grid-connected inverter. The proposed inverter can overcome the dead time of the traditional H-bridge inverter, greatly increase the switching frequency, and avoid the straight-through danger of bridge arm. In order to increasing the frequency and power density while ensuring the efficiency of the converter, a 2-channel interleaved parallel structure is adopted. Under the same output inductor current ripple, only a small amount of inductance is needed, and the current stress and loss of the high frequency switch tube can also be reduced. In this paper, the working principle and characteristics of the inverter and rectification modes of the converter are analyzed. At the same time, with the minimum inductance as the goal, the filter design requirements of different modes are comprehensively considered, and the Buck inductor and filter parameters were optimized using graphical methods. The parameters of the device are optimized. On this basis, the loss analysis model is constructed, and the loss distribution in the inverter and rectifier states is calculated and analyzed. Finally, this paper builds a 5kW experimental prototype, which verifies the above theoretical analysis and calculation. The efficiency of the inverter is higher than 98% from 20% to full load.

Key words： Dual Buck interleaved inverter rectifier filter inductor

Received: 04 July 2018 Published: 18 November 2019

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TM46

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	Articles by authors
	Wang Yifeng
	Cui Yulu
	Ma Xiaoyong
	Meng Zhun
	Ji Ruilin

Cite this article:

Wang Yifeng,Cui Yulu,Ma Xiaoyong等. An Interleaved Dual-Buck Full-Bridge Type Bidirectional Grid-Connected Inverter[J]. Transactions of China Electrotechnical Society, 2019, 34(21): 4529-4539.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L80617 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I21/4529

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