Integration of hybrid solar-wind energy sources with utility grid for improving power quality

Abstract

Most of the utilities are suffering to provide continues and clean power at the end users due to grid current distortion in the distribution system because of non-linear low power electronics loads. In addition to this, freely available inherent hybrid solar-wind energy sources are leads to cause some more grid current distortion. Adverting to the above major issue over long decade, this paper presents an efficient controller for 3-phase 4-leg interfacing voltage source inverter to perform not only current harmonic reduction but also optimal real power transfer, neutral current compensation and power factor correction simultaneously. These multiple functions can be achieved efficiently by using i<inf>d</inf>-i<inf>q</inf> control based shunt active power filter. The hysteresis comparator control is used to compare the obtained reference currents from i<inf>d</inf>-i<inf>q</inf> control with actual sensed actual currents to generate the error signal. This error signal decides the working of the inverter switches. The simulation is carried out by using MATLAB/SIMULINK tool under different grid and load conditions and the corresponding simulated results are encouraged. © 2018 IEEE.