A NOVEL CONTROL SCHEME FOR HARMONIC COMPENSATION IN RENEWABLE ENERGY INTEGRATED SYSTEM

Abstract

Non-linear loads are frequently used in both domestic and industrial applications. A non-linear load connected to the grid produces currents with harmonic content. The voltage and current of the grid are lowered in quality by these harmonics. A Proportional Integral-modified reduced order generalized integrator-based frequency-locked loop (PI+MROGI-FLL) is developed for controlling the interfacing inverter to mitigate the harmonics. The PI+MROGI-FLL is designed to evaluate the three-phase reference currents by extracting the fundamental constituents from the load currents. It offers many benefits, including improved harmonic mitigation, adaptive frequency and phase, grid synchronisation, and minimal computational burden. The suggested controller is modelled in MATLAB/Simulink using both a PV system and a hybrid system. The proposed controller’s performance is compared with that of existing conventional controllers. In comparison to other controllers, the PI+MROGI controller exhibits higher harmonic mitigation capability