A Boost-Type Three-Port Resonant Forward Converter With Flexible Power Flow Path Optimization for PV Systems

This brief proposes a three-port resonant forward topology for low power applications. Specifically, a modified boost converter, which adds a controllable freewheeling path, is combined with a resonant forward converter to simultaneously fulfill PV voltage regulation and battery charging management. Then, by taking the benefit of more flexible power flow adjustment, the PV and the battery can adaptively share the load current with reduced power conversion stages. Therefore, in comparison to other LLC-type three-port converters, the proposed scheme achieves the better compromise between cost and power efficiency.