Implementation of novel vector based current control method for DC capacitor voltage regulation in DStatcom

This paper introduces a novel current control method to regulate the capacitor voltage of DStatcom and thereby improve the quality of electrical power in the distribution system continuously. Proportional Integral controller seems to be appropriate in regulation of voltage and that is limited to some extent. The proposed control strategy regulates the capacitor voltage of DStatcom along with elimination of power quality problems. A vector based Hysteresis current controller is used with hysteresis comparators in multilevel integrated with a switching table which shows fast transient response for load parameter variations. An evaluation is carried out with MATLAB/Simulink and it shows excellent performance. The performance of the method is found good for DStatcom with both balanced linear and nonlinear loads.