ZVZCS full-bridge three-port converter and control method thereof

Abstract

The invention relates to a ZVZCS full-bridge three-port converter and a control method thereof, and belongs to the technical field of power electronic converters. The converter consists of a transformer, a primary side circuit and a secondary side circuit. The power management and control for three ports of the converter can be realized simultaneously by adjusting the duty ratio of four power switch tubes of the primary side circuit. A non-isolated buck-boost converter and an isolated full-bridge converter are integrated together, the reuse of a primary side switch tube is realized, the quantity of the switch tubes is reduced, and the power density is improved; moreover, a lag bridge arm of the full-bridge converter is serially connected with two diodes, a leading leg switch tube is connected with a parasitic diode and a junction capacitor in parallel, so that the leading leg switch tube realizes zero voltage switching, the lag bridge arm realizes zero current switching-off, the four switch tubes can realize soft switching respectively, and the switching loss is reduced, so that high frequency of the power converter device is realized. The ZVZCS full-bridge three-port converter isapplicable for new energy power generation systems, energy storage systems, electric vehicle power supply systems and the like.

Description

technical field [0001] The invention relates to the technical field of power electronic converters, in particular to a ZVZCS full-bridge three-port converter and a control method thereof, which are mainly used in new energy power generation, energy storage and electric vehicle power supply systems. Background technique [0002] The depletion of earth's resources and people's widespread concern about environmental issues make new energy power generation systems more and more important. At present, photovoltaic power generation and wind power generation are the two most widely used forms of renewable energy power generation. However, new energy power generation equipment has the following inherent defects: the output power of power generation equipment is affected by environmental conditions, and the output power varies randomly and is not continuous. , unstable, so the new energy power generation equipment cannot independently, stably and reliably supply power to the output r...

AI Technical Summary

Problems solved by technology

At present, photovoltaic power generation and wind power generation are the two most widely used forms of renewable energy power generation. However, new energy power generation equipment has the following inherent defects: the output power of power generation equipment is affected by environmental conditions, and the output power varies randomly and is not continuous. , unstable, so the new energy power generation equipment cannot independently, stably and reliably supply power to the output resistor

However, from the perspective of the existing three-port topology, there are also some disadvantages, such as the large number of switching tubes, the increase of switching tube losses, and the complex winding structure of the transformer. Novel Three-Port Circuit Topology for Efficiency and High Power Density

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