Doubly-Fed Induction Generator for Variable Speed Wind Energy Conversion Systems- Modeling & Simulation

Abstract

Abstract-The aim of this paper is to present the complete modeling and simulation of wind turbine driven doubly-fed induction generator which feeds ac power to the utility grid. For that, two pulse width modulated voltage source converters are connected back to back between the rotor terminals and utility grid via common dc link. The grid side converter controls the power flow between the DC bus and the AC side and allows the system to be operated in sub-synchronous and super synchronous mode of operation. The proper rotor excitation is provided by the machine side converter. The complete system is modeled and simulated in the MATLAB Simulink environment in such a way that it can be suited for modeling of all types of induction generator configurations. The model makes use of rotor reference frame using dynamic vector approach for machine model. Index Terms-doubly-fed induction generator (DFIG), pulse width modulation (PWM), dynamic vector approach, utility grid, wind energy conversion systems,

Performance Analysis of Wind Turbine as a Distributed Generation Unit In Distribution System

“…This is due to the energy contained in wind is in the form of kinetic energy. The power generated from wind turbines is given by equation (1) [12]: (1) where C p is coefficient of power, ρ is the air density in kg/m 3 , A is the area of the turbine blades in m 2 and V is the velocity of wind in m/s. Power coefficient C p contributes only a small fraction of the kinetic energy is converted into mechanical energy by wind turbines.…”

Overall Description of Wind Power

“…The results allow to analyse the behavior of the wind turbine to changes in different parameters, additionally the models can be used as a base for other studies. In [16], a model in Matlab/Simulink R based on a lookup table for the power and a second order system to model the wind turbine dynamics, is shown. In that case a double-fed induction generator is used and modelled through vector approach.…”

Grid Voltage Stability Enhancement Using Photovoltaic Based Static Synchronous Compensator

“…The control principle used is either the two-axis current vector control or Direct Torque Control (DTC). DTC has turned out to have better stability than current vector control especially when high reactive currents are required from the generator (Babu and Mohanty, 2010).…”