Analysis of Rotor Current Impact on DFIG-WECS under Fault Condition

Operation condition mode caused by voltage disturbances in wind energy conversion systems based on double fed induction generators, have brought great challenges regarding efficiency and reliability. This paper shows the impact of the rotor currents under 50, 80, and 100 % voltage drop, in addition, describes an analysis methodology to obtain the rotor current models. The main focus of the research is approximate their behavior under symmetrical and asymmetrical fault conditions. The results of the proposed models are compared to MATLAB-SIMULINK time domain simulations with approximately 95% similarity to a symmetrical voltage drop and 85 % to asymmetrical voltage drop condition