Abstract

Wind energy is regarded the most prominent development of the world’s energy challenges as it is clean, fuel free and a renewable source of power. Wind plants have graced from steady advances in technology. The amount of energy obtained from a Wind Energy Conversion System (WECS) not only depends on the characteristics of the wind regime at the site, but it also depends on the approach for the control used for the WECS. Wind energy supply fluctuates over day time, through the year and across region. The demand of electrical power varies over daytime and over the year but not correlated with the deviation of wind. To reach the upper limits of maximum power extraction from the wind one needs to be in command of the power electronic circuitry in order to run the system efficiently. Hence here is a inevitability to take up a project titled “MPPT Control Algorithm for Variable Speed WECS” using Perturb and Observe method. This thesis presents the modeling and simulation of a 1.5 kW variable speed wind energy conversion system. The controller part is developed for grid-side inverter as well as for the generator-side converter. The control of inverter is achieved using three sensors. Sinusoidal currents are supplied through PWM inverter by controlling the active and reactive current components in d–q rotating reference frame. While the quadrature-axis current is controlled to obtain maximum power of the wind turbine, the direct – axis current is adjusted to control the power factor. The simulated outcomes are represented incorporating P and O MPPT controller method using MATLAB 07. It indicates that the proposed format provides a viable solution for the variable-speed wind turbine using an efficient power conditioning system.