Optimized price based frequency regulation of multi area restructured power system with wind energy conversion system

Abstract

This paper describes the simulation of multi area multiple-units restructured power system with frequency regulation capability of the doubly fed induction generator (DFIGURE) through price based frequency-linked (PBFL) secondary control. Modified inertial control scheme responding proportionally to frequency deviations is used for DFIGURE to participate in frequency control of a mixed generation restructured system. Price based frequency-linked control acts as a supplementary control. The PBFL control is proportional to the unscheduled interchange (UI) based frequency linked pricing signal of availability based tariff (ABT) mechanism. The concept of contract participation factor (CPF) matrix is used to simulate the bilateral and contract violation transactions in the three area deregulated system. Integral gain of individual generating units are optimized through classical particle swarm optimization (PSO) technique, in order to have an optimal response of area frequencies, tie-lines power and power deviations of Gencos. MATLAB based simulations are carried out for three area deregulated power system to show the dynamic participation of doubly fed induction generator with frequency-linked pricing control in system frequency regulation. The various system responses have been studied to perceive the effects of the bilateral and contract violation transactions in deregulated market with consideration of different levels of wind penetration.