A Non-Isolated Three Port DC/DC Converter to Integrate Solar PV and Energy Storage System

Nowadays renewable energy sources are increasingly used by concerning environmental awareness. By integrating an energy storage system overcomes the intermittent nature of these renewable energy sources. So, a non-isolated three-port DC-DC converter is developed for integrating renewable energy sources and energy storage systems. To combine a PV battery DC power system, the presented converter has two unidirectional photovoltaic (PV), load ports and one bidirectional battery port. The main features of this converter are high efficiency, high integration capability, and a reduced number of components. The theoretical analysis was conducted to study all working modes, and a small-signal model of this converter was developed utilizing the state-space method. Extensive simulation has been carried out to verify the finding in all operating modes.