Effects of Grid Disturbances on Current Source Rectifier Controlled by FCS-MPC Algorithm

Abstract

Nowadays, the increasing number of non-linear loads influences the grid, causing grid voltage disturbances. These disturbances may be very dangerous for the equipment and can create faults in converter behaviour. However, the right control algorithm can improve the reliability of the work. For a current source rectifier, the finite control set model predictive control has been proposed. This method is very flexible because of the variety of the possible cost function forms. It has been examined under grid voltage disturbed by the higher harmonics and the voltage drop. Simulation results prove the ability to damp the distortions and to ensure the unity power factor. Summing up, the algorithm is a very good solution for use in applications such as battery charging, active power filtering and low-voltage direct current load feeding.

Bulletin of the Polish Academy of Sciences: Technical Sciences

“…The above control schemes have been developed for linear algorithms with a PWM modulator and they are not intended for nonlinear control such as finite control set model predictive control (FCS-MPC). In FCS-MPC methods, which are now one of the fastest developing control concepts, the resonance harmonics were damped using a virtual resistance [13], multivariable cost function [14][15][16] or in combination with proportional resonant current controller [17].…”