Research on a bi-directional DC/DC converter applied in stand-alone PV system

A current bi-directional DC/DC converter applied in stand alone PV system was introduced. The converter circuit topology and operation principle of presented was analyzed, a control strategy based on PWM duty cycle and phase shifting technology was proposed. The ZVS realization condition of the MOSFET, output power characteristics was analyzed theoretically and the converter small signal model was established based on analyzing in state space average mode. Finally, the simulation results illustrate the theoretical analysis, and a 1.2 kW prototype was build, the experiments demonstrate the performance of the converter presented.