Fast real and reactive power flow control of grid-tie Photovoltaic inverter

Abstract

A fast power flow control algorithm for a grid tie Photovoltaic inverter is presented here. The proposed method has the merits of design simplicity. The algorithm is fast and has the virtue of quick response to the change of required power output for the PV inverter. Current mode asynchronous sigma delta modulation is implemented to ease the controlled sensitivity to the grid current distortion. This process also opens a window to reduce the harmonics in the current. The simulation is performed in MATLAB/Simulink. A comparison is provided to observe the response behaviour of the algorithm.