Exploring the Potential of Synchronous Reluctance Generator in Grid-Connected Wind Energy Conversion Systems: A Comprehensive Feasibility Study and Control Analysis

This research investigates the control of a grid-connected wind energy conversion system (WECS), which uses different types of generators, such as permanent magnet synchronous generators (PMSGs) and doubly fed induction generators (DFIGs). However, the high cost of rare earth materials in PMSGs and the rotor losses associated with DFIGs have led to the exploration of the synchronous reluctance generator (SynRG) as a promising alternative. The SynRG is an attractive option because it is robust, simple, and cost-effective. It does not have a rotor cage, windings, or magnets. This paper studies the feasibility of integrating a SynRG into a WECS, with a specific focus on the 11kW SynRM and a wind turbine prototype. The converted wind energy is injected into the grid using a back-to-back converter. The speed control of the SynRG is based on maximum power point tracking technology. A rectifier connected to the generator regulates the DC bus voltage. The control of active and reactive power is achieved using a conventional PI-based field-oriented control (FOC) strategy, employing an inverter connected to the grid. The proposed system and control scheme are demonstrated through meticulous numerical simulations conducted using the MATLAB/Simulink software. The simulation results show that the SynRG can efficiently convert energy across the entire wind speed range within the turbine's tolerance. In conclusion, this study shows that the SynRG is a viable option for WECSs. It is cost-effective, has a robust structure, and is simple. The paper effectively demonstrates the proposed system and control strategy, providing valuable insights for researchers and practitioners in the field.