Predictive Direct Torque Control Strategy for Surface-Mounted Permanent-Magnet Synchronous Generators

Conference: NEIS 2017 - Conference on Sustainable Energy Supply and Energy Storage Systems
09/21/2017 - 09/22/2017 at Hamburg, Deutschland

Proceedings: NEIS 2017

Pages: 6Language: englishTyp: PDF

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Abdelrahem, Mohamed; Kahia, Billel; Kennel, Ralph (Institute for Electrical Drive Systems and Power Electronics, Technical University of Munich, Germany)
Hackl, Christoph M. (Research Group “Control of Renewable Energy Systems (CRES)”, Munich School of Engineering, Technical University of Munich, Germany)

This paper proposes a predictive direct torque control (PDTC) technique for surface-mounted permanent-magnet synchronous generators (PMSGs) in variable-speed wind turbine applications. A discrete-time model to predict the future performance of the PMSG is developed and a cost function to selected the optimal switching state from a finite number of states is formulated. The control variables are the torque and d-axis current of the PMSG. Therefore, the proposed PDTC is simple in comparison with the conventional PDTC where the control variables are the torque and stator flux. Furthermore, the maximum torque per ampere scheme can be easily achieved using the proposed PDTC. The proposed PDTC is experimentally implemented and its performance is investigated at various operation conditions and under variations of the PMSG parameters.