Solar Power Based Water Pump Employing Z-Source Inverter for PMSM Drive

Single stage ZSI (Z Source Inverter) based solar PV (Photovoltaic) power conversion system is presented in this paper for PMSM (Permanent Magnet Synchronous Motor) used for water pump load. Most generic design objectives of water pumping systems are high efficiency, reliability, low maintenance and cost optimization. The proposed system eliminates the need of conventional DC-DC conversion stage for extracting the maximum power of PV array and driving a PMSM simultaneously. It results in reduced complexity with an increase efficiency and minimum voltage stress across the switches. In the proposed scheme, simple boost control approach with field-oriented control mode is used for the ZSI. The MATLAB simulation results are shown for validating the proposed concept under variations in operating conditions.