Simulation and Modelling Of Wind Energy Generator for Smart Grid

Abstract

In this paper the authors present a steady state model of wind generator. The operating characteristics Tip-speed-ratio (TSR) and Cp (Power coefficient) of the wind turbine over varying wind speeds (WSs) have been presented for the wind turbine specifications. Also the DFIG Induction generator model has been presented with the mathematical equations for stator and rotor voltages and currents respectively as a function of the electrical equivalent circuit parameters, slip and mechanical power out of the turbine (as an electrical power output of the turbine in MW). Further the variation in the stator and rotor active and reactive power output with the variation in the WS (m/s) have been presented.As, the wind turbine normally stay away from the grid terminals, so we need to consider the transformer and cable impedance for calculating the terminal voltage of the Grid (PCC), the variation in the terminal voltage with the variation of the WS have been studied. The proposed work is carried on MATLAB. Further the developed model of the wind generator and its performance has been tested on a real-time WS time-series data available from MNRE (India).