Improved Dynamic Performance and Power Quality Issues of Grid Connected Pv-Array

Abstract

In this work, a detailed model of grid-connected PV-array have been simulated in MATLAB/Simulink environment with a fixed step size of one microsecond and a study is conducted to analyze the dynamic performance of the system. The PV-array system of capacity 100 KW consisting of boost converter, 3-level voltage source inverter using pulse width modulation technique, is connected to a utility grid through three single-phase transformers. The boost converter using improved incremental conductance is implemented to meet the output power pattern developed by the array with the specifications of the PV-array in a faster manner. The total harmonic distortion ‘THD’ of the electrical supply produced by PV-array is reduced to 1.94% by using suitable passive LC filter. The THD of the supply is within the limits as specified by IEEE standard-1547. In addition to this, the power factor correction block is implemented to feed with a supply of better power quality.