PMSM Based Grid Interactive Solar Water Pumping System

Abstract

This paper introduces a grid interactive solar water pumping system. This system utilizes a new non-isolated boost DC-DC converter with SPV array as input in the first stage, a three phase voltage source inverter (VSI) is used to drive the permanent magnet synchronous motor to which the centrifugal pump is coupled as the second stage and a voltage source converter is used for effective power transfer between the grid and the system. An extended topology for boost DC-DC converter based on voltage lifting technique is used here. A perturb and observer MPPT algorithm control the duty ratio of the converter and extract the maximum energy from the PV array. A Sine PWM based Field Oriented Control technique is implemented for driving the PMSM coupled water pumping the bidirectional power flow between the common DC link of the system and the grid is controlled with unit vector template scheme. This system is modeled and operation is verified through simulation studies using MATLAB/Simulink.