INVERTERIO IMITACINIO MODELIO MATLAB APLINKOJE TYRIMAS

Abstract

Paper describes simulation results of inverter model based on proposed converter with two transistor switch-es using Matlab. The aim of this research to investigate behavior of proposed model of the micro inverter based on proposed converter, when inverter operates autono-mously (islanding) and running parallel in the local electricity network.  The simulation of inverter’s operation on autonomous mode using nonlinear load was performed, as well as it runs in parallel with the local power network polluted with harmonics. The main goal of these simulations is to observe the response of output current of inverter to the harmonical distortions of local grid. Examination of inverter model based on proposed converter in Matlab environment helps to determinate the resistance of inverter output signal to distortion in local electrical grid using two working modes: 1. the autonomous mode using nonlinear load; 2. the parallel mode with local electric grid polluted by higher order harmonics.