双Buck/Boost集成双有源桥三端口DC-DC变换器

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Abstract In this paper, Dual Buck/Boost integrated dual active bridge (DAB) three-port DC-DC converter combines the conventional DAB and two bidirectional Buck/Boost circuits. Hence power switches are shared, and the power density is improved. The PV-battery hybrid power system is taken as an example to analyze the proposed converter topology. The phase shift plus PWM control is adopted here. The phase shift angle is used to control the power flow between the input port and the output port, while the duty cycle is employed to match the input voltages. Thus the maximum power point tracking (MPPT) can be achieved and the power flow between PV and battery can be balanced. The basic operation principles, steady state characteristics and zero voltage switching (ZVS) conditions are analyzed. The ZVS conditions for the conventional DAB operating in small phase shift angle can be greatly improved, and thus the converter can operate under ZVS in a wide operation range. A 300 W converter prototype is built to verify all considerations.

Key words： Multi-port converter bidirectional Buck/Boost circuit dual active bridge circuit zero voltage switching phase shift + PWM control

Received: 17 June 2014 Published: 02 December 2016

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TM46

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	Articles by authors
	Sun Xiaofeng
	Liu Feilong
	Xiong Liangliang
	Wang Baocheng

Cite this article:

Sun Xiaofeng,Liu Feilong,Xiong Liangliang等. Dual Buck/Boost Integrated Dual Active Bridge Three-Port DC-DC Converter[J]. Transactions of China Electrotechnical Society, 2016, 31(22): 73-82.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I22/73

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