Advanced Control of a Compensator Motor Driving a Variable Speed Diesel Generator with Rotating Stator

Mohammadjavad Mobarra, Bruno Tremblay, Miloud Rezkallah and Adrian Ilinca
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Mohammadjavad Mobarra: Wind Energy Research Laboratory (WERL), Université du Québec à Rimouski, Rimouski, QC G5L 3A1, Canada
Bruno Tremblay: Department of Computer Science and Engineering, Université du Québec à Rimouski, Rimouski, QC G5L 3A1, Canada
Miloud Rezkallah: Electrical Engineering Department, Ecole de Technologie Superieure, Montréal, QC H3C 1K3, Canada
Adrian Ilinca: Wind Energy Research Laboratory (WERL), Université du Québec à Rimouski, Rimouski, QC G5L 3A1, Canada

Energies, 2020, vol. 13, issue 9, 1-15

Abstract: Variable speed generators can improve overall genset performance by allowing the diesel engine to reduce its speed at lower loads. In this project, a variable speed diesel generator (VSDG) uses a rotating stator driven by a compensator motor. At lower loads, the stator turns in the opposite direction of the rotor, a process that can be used for purposes like maintaining a fixed relative speed between the two components of a generator. This allows the diesel engine to turn at a lower speed (same as the rotor) and to increase its efficiency. The present research addresses the control of the compensator motor driving the generator’s stator using a variable-frequency drive that adapts the speed to its optimal value according to the load. The performance of the proposed control strategy was tested using a Freescale microcontroller card programmed in C-code to determine the appropriate voltage for the variable-frequency drive. The control algorithm uses a real-time application implemented on an FDRM-KL25Z signal processor board. The control performance of a 2 kW asynchronous motor (LabVolt EMS 8503-00/208 V/3 ?/60(50) Hz) was demonstrated experimentally at different operating conditions.

Keywords: variable frequency drive; motor speed control algorithm; digital signal processor (DSP); variable speed diesel generator; rotating stator concept (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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