Model predictive control of DSTATCOM for power quality improvement: Modeling, simulation and analysis-part1

In this paper, a novel model predictive current control strategy is proposed for DSTATCOM to improve the power quality in distribution system. Unlike classical control schemes, the proposed method neither requires current PI controllers nor modulators at switching signal generation stage. The discrete-time model of the converter, filter and terminal voltage are used to predict the future behavior of the compensating currents for each of the eight possible switching states. The control method decides a switching state in which the actual currents are closer to their references. In this first part, proposed method is verified through extensive simulation in Matlab platform and a comparative analysis is made with HCC and SMC current control schemes. It has been found that total harmonic distortion of load compensation is well within the allowable range of IEEE standards with achievement of unit power factor.