Design and Simulation of Voltage Source Grid Connected Inverter (VSI)

Abstract

Design and simulation of a voltage source grid connected inverter (VSI) have been introduced in this paper. A grid connected PV array of 250 KW connected to a 25-kV grid via a three-phase voltage source inverter (VSI) was designed and simulated. Mathematical and electrical equations of the design have been presented. Different components of the system have been described and simulated using MATLAB/ SIMULINK. A control unit of the grid-side inverter controlling the maximum power point tracking (MPPT), DC voltage regulator, current regulator, pulse width modulation (PWM) and phase lock loop (PLL) circuit have been discussed.