Performance Evaluation of Second Order Generalized Integrator-Quadrature Algorithm for DSTATCOM in Non-ideal Grid

Abstract

This paper evaluates performances of Second Order Generalized Integrator-Quadrature (SOGI-Q) supported adaptive control algorithm for distributed static compensator (DSTATCOM) to enhance power quality (PQ) in a non-ideal grid in the presence of unbalanced non-linear load. SOGI-Q makes it possible to identify the changes associated with the strength of the grid using the tracking of voltage unit templates. The proposed algorithm is used for extraction of average power consumption corresponding to load current component for estimating the reference signals. Reference signals are compared with sensed non-ideal grid signals for generating gating signals for the DSTATCOM to mitigate the various PQ issues. Proposed SOGI-Q control algorithm has been successfully designed for non-ideal grid scenario to mitigate current harmonics, voltage harmonics, reactive power, maintain load balancing and power factor of the grid in the presence of non-linear load. The study is performed using MATLAB software in Simulink environment.