TRANSIENT ANALYSIS AND MODELING OF WIND GENERATOR DURING POWER & GRID VOLTAGE DROP

In recent years, wind energy has become one of the most important and promising sources of renewable energy, which demands maintaining better means of system stability. The performance of a grid-connected wind energy conversion system (WECS), based on a doubly fed induction generator (DFIG) fed by an AC-DC-AC converter, is presented. The stator winding of the DFIG is connected directly to the grid and the rotor of the DFIG is connected to the grid through a AC/DC/AC converter. The main power is transferred through the stator windings of generator that are directly connected to the grid. Around 65- 75% of total power is transmitted through the stator windings and the remaining 25% of total power is transmitted using rotor windings (i.e.) through the converters.