Increase the Speed and Accuracy of Open Circuit Fault Detection of DFIG Wind Turbine Converter for Use in Fault-Tolerant Control of IGBT Switch Open-Circuit

Condition Monitoring (CM) and Fault Detection of wind turbines will increase the reliability and availability of the turbine. One of the most common types of wind turbines is the DFIG type with a back-to-back converter. The IGBT open-circuit fault rate of the converter is significant compared to the total fault rate in the wind turbine. The IGBT open-circuit fault of the wind turbine converter will cause a defect in the current output of the converter, resulting in reduced wind turbine output performance. In order to fault-tolerant control in back-to-back converters, an accurate and fast method of open-circuit fault detection is required. In this paper, the IGBT open-circuit fault for DFIG wind turbine back-to-back converter using a new method detected and isolated focusing on increasing speed and accuracy. The proposed method is Low cost and it does not require extra sensors and hardware to detection and isolation of the fault. The fault diagnostic method is based on Feature-Level fusion. To evaluate the proposed structure, a simulation setup based on real data of a 2.5 MW turbine is used. Simulations result showed the effectiveness and robustness of the proposed method in the detection of single and multiple simultaneous and non-simultaneous faults in a different LEG or single LEG of the grid side and rotor side converter.