SOGI-ANF Filter based Micro Grid with Solar Water Pumping System

This paper presents a solar water pumping system driven by a PMSM (Permanent Synchronous Magnet Motor) integrated with the grid and powered by solar energy. This technique is being proposed as a way to continuously run a WPS (Water Pumping System) with better power quality irrespective of solar insolation variations. In order to create such a system, the DC link is integrated into a VSC (Voltage Source Converter) for utility grid control and a VSI (Voltage Source Inverter) for PMSM control. Additionally, the power flow between a solar PV system and the associated utility grid is managed using unit vector template theory. A filter technique, i.e., a “SOGI-ANF filter” based control method, is utilized to filter the harmonics and the DC offset of the grid currents and forecast the synchronizing signal components. Further, in order to extract maximum power from the solar PV array, an incremental conductance MPPT (Maximum Power Point Tracking) technique is employed, and the speed of the PMSM is controlled via sensor-less vector control. The proposed system is simulated on MATLAB Simulink and was tested on several anomalies, and the responses were found to be well within the IEEE-519 Standard norms.