An IRP based control algorithm for load compensation by DSTATCOM under polluted supply system

When D-STATCOM which stands for DISTRIBUTION STATIC COMPENSATOR is used for load compensation, the accuracy of identifying the compensation current needed by the tracking system is very essential for effective compensation under polluted source voltage condition and that further depends upon the control algorithm applied. At present there is several control algorithms presented in literature. This paper describes and analyzes the basic of the conventional IRP based control algorithm and presents and simulates an improved instantaneous reactive power (IRP) based control algorithm to eliminate the errors caused by conventional control algorithm, and thereby overcomes the shortcomings of conventional algorithm. These both algorithms were simulated under MATLAB/Simulink. The theoretical exploration and simulation results illustrate the performance and accuracy of the proposed algorithm under asymmetric and distorted source voltage. Hence the results obtained by simulation also show which algorithm can accurately detect the harmonics, reactive component of load current even under the asymmetric and distorted source voltage condition, and the precision and advantage the of control algorithms are verified as well.