GRID CONNECTED WIND ENERGY CONVERSION SYSTEM - SIMULATION UNDER STEADY STATE CONDITION

摘要

This paper presents modelling and simulation of a utility interactive wind energy conversion system [ WECS ] with an asynchronous link comprised of a diode bridge rectifier and a line commutated inverter. The control object is to track and extract maximum power from the wind energy system [ WES ] , to regulate the unregulated wind energy source and transfer this regulated power to the utility. The behavior of the grid connected induction generator (GCIG) driven by typical prime mover such as mini hydro / wind turbines are presented. Certain practical operational problems of such systems are identified. Analytical techniques are developed to study the behavior of such system. The system consists of the induction generator (IG) feeding power to a 33 kV grid through a step-up transformer and a transmission line. Terminal capacitors to compensate for the lagging VAR are included in the study. Computer simulation is carried out to predict these system performances at a given input power from the turbine. Effects of variation in grid voltage, frequency, input power and terminal capacitance on the machine and system performance are studied.