Active power control of single-phase grid-connected system supplying nonlinear load

This paper presents active power control or real power of single-phase grid-connected system supplying nonlinear load. The control method employs the reference current calculation combining the required real component of the grid current derived from required active power transfer to the grid and required harmonic current for harmonic elimination associated with the nonlinear load. With this method, power of any type of renewable energy can be transferred to the nonlinear load and the grid, the grid current is nearly sinusoidal, the reactive power of the nonlinear load can be compensated and the power factor is always nearly unity. The simulation results verify the correctness of operation for the proposed functions using MATLAB/Simulink.