A high-efficient converter for photovoltaic water pumping system

This paper proposes a new converter-inverter drive system for photovoltaic water pumping without the use of Battery. The converter is designed to drive a 3 phase drives like PMSM, Induction Motor directly from PV energy. This converter is mainly used for water pumping purposes in areas where electrical power is unavailable. Use of photovoltaic energy is one of the solution for this problem. It proposes a Dual Inductor Converter consisting of a resonant tank, voltage doubler rectifier and a snubber circuit which act as a DC-DC boost converter. The output of the converter system is given to the inverter system. SPWM control is used to triger the IGBTs in the inverter. MPPT control is provided; it maximizes the power output from a PV module or array with varying operating conditions, and therefore maximizes the system efficiency. To obtain the maximum power extracting efficiency perturb and observe maximum power point tracking algorithm is introduced for the controlling of converter.