Design of Photovoltaic MPPT Controller Using Interleaving Parallel Buck Circuit

A photovoltaic controller is a converter which can transform the energy generated by photovoltaic cells and control the battery charging and discharging. The maximum power point tracking (MPPT) technology can maximize the efficiency of photovoltaic cell and effectively improve the efficiency of photovoltaic power generation system. The single-phase buck circuit is often used in a MPPT controller, which has some shortcomings such as large output current ripple, poor stability of output power, and so on. Therefore, the topological structure of two-phase interleaved parallel buck circuit is proposed in this paper. Experimental results show that ripples of output voltage and current are greatly reduced, the stability of power output is good, and it is more suitable for the MPPT photovoltaic controller.