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Research Article Open Access
Nowadays power quality is the most important issues in distributed power grids. Hysteresis current is one of the factors that reduce power quality in grid. This paper describes a hysteresis current controller inverter with application of a grid-connected PV system with application of LCL filter. The aim of this project is to reduce the hysteresis current magnitude and its THD by three levels PV gride connected inverter and remain in steady state inverter while reducing the switching frequency, reduces the losses. In addition, we add to this inverter, L filter and next time add LCL filter. We observe the function of each of them on the hysteresis current control. In fact, reducing hysteresis current causes improves power quality and final aim of this project is to improve the power quality of distribution network. This control method provides, unity power factor, load harmonic distortion reduction and reduce hysteresis current amplitude to 2.2 A. So by this method we improved power quality of distributed grid. This system uses one of the main sources of renewable energy. In this paper we want to do a complete simulation for hysteresis current control software using MATLAB / SIMULINK and SIM POWER toolbars.
Hysteresis, PV inverter, LCL filter, Controller, Current, Hysteresis, PV inverter, LCL filter, Controller, Current