Load harmonics extraction based decoupled control of grid connected solar photovoltaic system

The global energy shortage and the requirement for energy systems that are sustainable has led to the widespread penetration of Renewable Energy Sources (RES). The intermittent characteristics of these Renewable Energy Sources make it a daunting task to integrate renewable energy, especially solar energy resources into the electric grid. The increasing number of Distributed Generation (DG) systems along with the existing non-linear loads create several issues due to variable output power and further worsens power quality problems like overvoltage, voltage fluctuations and harmonics. This paper describes an attempt on the development of a control strategy based on decoupled control with load harmonics extraction for the mitigation of power quality issues in grid integrated Solar Photovoltaic (SPV) systems. The performance of the grid integrated SPV system with linear and non-linear loads is investigated by simulation using MATLAB/Simulink. The effectiveness of the developed control strategy is validated by comparing the performance with an uncompensated system consisting of grid with linear and non-linear loads. (paper)