Modelling of a ZVS full-bridge DC-DC converter for photovoltaic applications

This paper presents the small-signal ac model of a zero-voltage switching full-bridge dc-dc converter employed as a micro-inverter (MIC) in photovoltaic applications. The proposed model relates the input voltage (supplied by the photovoltaic module) with phase-delay of phase-shift modulation. It can...

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Bibliographic Details
Published in:	2017 Brazilian Power Electronics Conference (COBEP) pp. 1 - 6
Main Authors:	Andres, Bernardo, Cassol Bach, Leonardo, da Silva Martins, Mario Lucio, Leaes Hey, Helio, Concatto Beltrame, Rafael
Format:	Conference Proceeding
Language:	English
Published:	IEEE 01-11-2017
Subjects:	DC-DC power converters Full-bridge dc-dc converter Mathematical model Microwave integrated circuits Phase modulation Phase-shift PWM Photovoltaic (PV) Photovoltaic systems Zero voltage switching Zero-voltage switching (ZVS)
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Summary:	This paper presents the small-signal ac model of a zero-voltage switching full-bridge dc-dc converter employed as a micro-inverter (MIC) in photovoltaic applications. The proposed model relates the input voltage (supplied by the photovoltaic module) with phase-delay of phase-shift modulation. It can be used to design the voltage controller to implement the desired maximum power point tracking (MPPT) algorithm. To accomplish this goal, the state-space averaging approach is used. Experimental results (step response and frequency sweep) are obtained to validate the model.
DOI:	10.1109/COBEP.2017.8257323