Integration of renewable energy for the harmonic current and reactive power compensation

This paper deals with a control technique for multilevel converter topologies base on Direct Lyapunov Control Method (DLCM) for integration of Renewable Energy Resources (RER) into the power grid. The compensation of variations in reference current components is considered properly in this control plan, which is the main contribution and novelty of this work in comparison with other control strategies. The proposed control technique provides the injection of harmonic current components of loads via the interfacing system, which is based on multilevel converter topologies and compensation of loads reactive power. Then, the active power in fundamental frequency will be supplied through the main grid and a unity Power Factor (PF) between the grid current and load voltage is obtained during the connection of nonlinear load to the grid. High performance of DLCM is validated through simulation results during dynamic and steady-state operating conditions.