Fault Resilient Direct Torque and Power Control Strategy for Back to Back Converters in Direct Drive PMSG Wind Energy Conversion Systems

Fault tolerance is considered crucial in wind turbines to increase reliability and availability. This article describes a fault-tolerant permanent magnet with direct drive and innovative direct control synchronous generator PMSM techniques that can handle high-power semiconductors OPEN-CIRCUIT failure in back-to-back trans missions. The fault-tolerance system consists of five legs. A converter with an interconnected leg linked to an alternator phase, a converter with a shared leg connected to an alternator phase, and a converter with an Alternating Current Triode to its proper grid phase. The development of DTC and DPC procedures for MSC and GSC is the primary contribution of this study. A reliable failure diagnostics method is also provided, providing the information required to immediately activate fault-tolerant remedial measures without the usage of additional sensors. To demonstrate the effectiveness of the proposed fault-tolerant PERMANENT MAGNET SYNCHRONOUS GENERATORS drive, simulation and experimental data are presented.