Design and control of a DSTATCOM for power quality improvement using cross correlation function approach

Abstract

This paper presents the design of a three phase DSTATCOM (Distribution Static Compensator) and its control algorithm based on correlation and cross correlation function approach for power quality improvement under linear/ nonlinear loads in a distribution system. In this approach, an extraction of fundamental active and reactive power components of load currents is based on correlation and cross correlation functions in time domain. For estimation of fundamental active and reactive power components of load currents, a numerical integration is applied in correlation and cross correlation function. The DSTATCOM is modeled under linear and nonlinear loads and its performance is simulated in the MATLAB environment using SIMULINK and Sim Power System (SPS) toolboxes. The performance of DSTATCOM is found satisfactory under time varying and unbalanced loads.

Keywords: Correlation and cross-correlation coefficients, DSTATCOM, Power factor correction, Zero voltage regulation