Power Quality Improvement of a Self-Excited Induction Generator Using NFPI Controller Based Hybrid STATCOM System

In this paper a control scheme to improve power quality as well as voltage synchronization of self-excited induction generator (SEIG) driven by wind turbine feeding power to a remote area has been proposed. In practice, Neuro-Fuzzy PI (NFPI) controlled hybrid static compensator (STATCOM)is used to control voltage and frequency regulation of SEIG. The NFPI controlled STATCOM is used to balance the reactive power requirement of SEIG under load perturbation and tries to make terminal voltage constant. Integration of STATCOM with BESS is done to make a hybridized STATCOM system to enhance the active power capability of traditional STATCOM. This helps to offset the deviation resulted in both active and reactive power thus enhancing active power capability, reliability and system stabilization. The dynamic model of Hybrid STATCOM using stationary two-axis theory is developed for analyzing system behavior. Simulated results show improved power quality and performance of the system under variable loading condition in stand-alone application.