Service Continuity of Wind Energy Conversion System Based on Nonlinear Control and Fault Tolerant Technique

the work presented in this paper is about Wind Energy Conversion System (WECS) service continuity under Rotor Side Converter (RSC) IGBT open circuit fault during the application of Backstepping Control (BSC) to the Doubly Fed Induction Generator (DFIG) and during the application of the proposed fault tolerant technique to the RSC. Among the strong characteristics of the BSC technique is how to deal with DFIG-WECS nonlinearities in fault appearance degraded mode resulting in the extension of its functionality until the application of fault tolerant techniques. A new fault tolerant technique is associated to our DFIG-WECS in the aim of guaranteeing the continuity of service under IGBT open circuit fault presence. It is found that, the proposed voltage reconfiguration technique compared to the usual used fault tolerant techniques does not need to isolate the faulty leg resulting in a less inverter losses. The results obtained from the control technique and the reconfiguration voltages under MATLAB-Simulink gives value to the proposed techniques used through the faulty condition.