A NOVEL FOUR-LEG VOLTAGE SOURCE CONVERTER BASED VOLTAGE AND FREQUENCY CONTROLLER FOR AN AUTONOMOUS WIND ENERGY CONVERSION SYSTEM

摘要

In accordance with the present invention a four-leg voltage source converter (6) based voltage and frequency controller for autonomous wind energy conversion system said system comprising: a stator winding of the isolated asynchronous generator (4A 4B 4C); a wind turbine (1) being connected to the rotor of said asynchronous generator through gear box (2); a star connected excitation capacitor bank with neutral terminal (5); a four-leg voltage source converter (6) connected at the point of common coupling (PCC) through a set of interface inductor (9) said each leg of said voltage source converter comprises of a plurality of insulated gate bipolar junction transmitors ....