Farm Integration with Grid using Converter Topology

Abstract

The renewable energies are the only sources that can replace fossil combustibles. These new source are mainly clean, safe, and quite cheap for the user. Among them, the wind power has driven a considerable attention for last fifteen years. Many large wind turbines, installed either off-shore, operate at a variable speed and use several types of electrical AC generators: Synchronous and Induction. The amount of energy captured from a wind energy conversion system (WECS) depends not only on the prevailing wind at the site, but also on the control strategy used for the WECS. To extract the maximum energy, it is needed to build adequate power electronics control for synchronizing the currents and the voltages with the grid frequency when the complete system works at variable frequency. Wind turbines can be made with either constant-speed or variable-speed mechanical input. Two configurations of variable- speed electromechanical converters are nowadays retaining attention: the direct-drive synchronous generator with power electronic converter and the doubly-fed induction generator with gearbox. In this project, the electrical power generated by using wind energy to drive wind turbine. This mechanical power can be converted into electrical power by using induction generator. Induction motor is operated as an induction generator and generates variable voltage, variable frequency output. AC output of an induction generator will be fed to converter consist of uncontrolled rectifier and single phase inverter, but in this project variable voltage source is considered as the AC output of induction generator. Simulation is carried out considering varying source voltage with open loop control. Buck Converter with SG3525 PWM Controller is used to stabilize the DC link constant. Arduino Microcontroller Programme is developed for SPWM Method to trigger the gate pulses of Single Phase Inverter. Design of filter required for the grid integration is calculated. These entire system is simulated on Simulation Package. Hardware prototype model will be developed and integrated to the grid or feed to the load.