Multiport DC-DC interleaved boost converter supplemented by hybrid system of different capacities PV and battery power system

This paper describes a novel operation performance of a three phase induction motor fed by a Hybrid Distributed Generation System (HDGS). The HDGS is accompanied with different capacities of photovoltaic (PV) array and a battery to supply a fixed power for driving a three phase induction motor. The HDGS employs a novel multiport interleaved DC boost converter for utilizing DG sources in a unified structure. In this structure, each switching cycle of proposed interleaved boost converter is divided into five switching periods that introduce five different duty ratios. Utilizing these duty ratios result in regulating the PV/battery powers. Hence, a fixed electrical power for the three phase induction motor is achieved. Due to fixed power capacity of the system in different environmental conditions, the three phase induction motor will be able to run at its nominal power. Incremental conductance (IC) has been used to regulate the PI parameter of speed controller in order to realize better dynamic response. Reducing ripple content in multiport converter interleaved switches is used. The proposed system is suitable for application of agricultural water pumping systems.