Performance Analysis of Different Current Control strategies for Grid Tied Three Phase Voltage Source Inverter

Abstract

This paper deals with the comparative performance analysis of differentcurrent
controlstrategies for grid connected three phase voltage source inverters (VSI). The different
strategies considered were conventional Hysteresis current controller, Ramp comparison
controller and User Defined Constant Switching frequency (UDCS) controller. Limitations
and advantages of each control strategy have been discussed. The different control strategies
have been simulated using Matlab Simulink 8.1. Based on the simulation results comparative
performance analysis has been carried out in terms of Dynamic response, Reference tracking
capability and Total Harmonic Distortion (THD). Phase Plane Trajectory of different
strategieshas been simulated in order to validate the performance of each control strategy
under non-linear disturbance conditions.