Fault-Tolerant SVPWM Method for Multiple Open-Switch Faults in Six-Phase Wind Turbine Converter

Subject Areas : Renewable energy

Rouhollah Bolbolnia ¹ , Karim Abbaszadeh ²

1 - Department of Electrical and Computer Engineering- Faculty of Electrical Engineering, Khajeh Nasir Toosi University of Technology, Tehran, Iran
2 - Department of Electrical and Computer Engineering- Faculty of Electrical Engineering, Khajeh Nasir Toosi University of Technology, Tehran, Iran

Received: 2021-12-28 Accepted : 2022-02-28 Published : 2023-08-23

Keywords: Wind turbine, Fault-tolerant, six-phase converter, multiple open-switch fault, space vector pulse width modulation,

Abstract :

Due to the rapid growth of wind energy and its significant effect on the power grid, fault-tolerant in wind turbines is considered crucial to increase their reliability and availability levels. This paper presents a fault-tolerant technique for multiple open-switch faults in a six-phase AC-DC converter as the most vulnerable components of the wind turbine system. The proposed fault-tolerant technique uses the redundancy mode of six-phase space vectors in space vector pulse width modulation (SVPWM) and changes the switching signals in fault sectors, replacing the desired space vector with another space vector to avoid creating an undesired space vector. The main advantage of this technique is that, without adding any legs, switches, or triode for alternating currents (TRIAC) to the converter circuit, and without the need for complex calculations, the open switch faults are tolerated and the value of overcurrent and total harmonic distortion (THD) caused by the open switch faults on the healthy and faulty phases are reduced. Finally, the proposed fault-tolerant technique is evaluated by MATLAB simulation and the results of this simulation show its effectiveness.

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