A Four-Port DC–DC Converter for a Standalone Wind and Solar Energy System

This article proposes an integrated, four-port, dc-dc converter for power management of a hybrid wind and solar energy system when it works in the standalone mode. Compared with existing four-port dc-dc converters, the proposed converter has the advantage of using a simple topology to interface sources of different voltage/current characteristics. The proposed converter is constructed for power management of a hybrid energy system, which consists of a photovoltaic panel, a wind turbine generator, a rechargeable battery bank, and a load. The simulation and experimental results show that the proposed converter is capable of not only controlling the charge and discharge of the battery according to the state of the charge, but also maintaining the dc-link voltage to be constant.