Improvement of the availabiliy of the DFIG wind turbines during voltage DIP with crowbar circuit

The purpose of this paper is to solve the problem of disconnection of the wind turbines from the grid in order to increase the annual benefits from the wind farm. Our project is about the wind turbine which uses doubly fed induction generator (DFIG) to supply electrical power. The main defect of this technology is its sensitivity to the reaction of grid voltage dips. In fact we started by analyzing the response of DFIG to the grid fault by using mathematic model. Then, we elucidated the performance of the generator during grid faults using simulation results and we suggested a solution to keep wind turbines connected to the grid. We eventually verified the efficiency of this solution using Matlab/Simulink.