Frequency support capability of variable speed wind turbine based on electromagnetic coupler |
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Affiliation: | 1. Department of Electrical Engineering, Tsinghua University, Beijing 100084, PR China;2. Department of Wind Energy, Technical University of Denmark, Risø Campus, Frederiksborgvej 399, 4000 Roskilde, Denmark;1. Electrical Engineering, Purdue University, Fort Wayne (IPFW), 2101 E. Coliseum Blvd., Fort Wayne, IN 46805, United States;2. MEG Research, MEG Center, Division of Neurology, Cincinnati Children''s Hospital Medical Center, 3333 Burnet Avenue, Cincinnati, OH 45229-3039, United States;3. Division of Developmental Medicine, Laboratories of Cognitive Neuroscience, Gaab Lab, Boston Children''s Hospital, 1 Autumn Street, 6th Floor, Room #640, Boston, MA 02215, United States;1. Immanuel Kant Baltic Federal University, A.Nevskogo 14, Kaliningrad, 236041, Russia;2. Faculté des Sciences et Techniques, Université du Havre, B.P. 540, 76058 Le Havre Cedex, France;3. Department of Probability and Statistics, St.Petersburg State University, University Prospect 28, St.Petersburg, 198504, Russia;1. Faculty of Engineering & Industrial Sciences, Swinburne University of Technology, Hawthorn, VIC 3122, Australia;2. Griffith School of Engineering, Griffith University, Gold Coast, QLD 4222, Australia;3. School of Engineering & Information Technology, The University of New South Wales, Canberra, ACT 2600, Australia |
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Abstract: | In the variable speed wind turbine based on electromagnetic coupler (WT-EMC), a synchronous generator is directly coupled with grid. So like conventional power plants WT-EMC is able to support grid frequency inherently. But due to the reduced inertia of synchronous generator, its frequency support capability has to be enhanced. In this paper, the frequency support capability of WT-EMC is studied at three typical wind conditions and with two control strategies—droop control and inertial control to enhance its frequency support capability. The synchronous generator speed, more stable than the grid frequency which is the input signal for Type 3 and Type 4 wind turbine frequency support controller, is used for the calculation of WT-EMC supplementary torque command. The integrated simulation environment based on the aeroelastic code HAWC2 and software Matlab/Simulink is used to build a 2 MW WT-EMC model and study the frequency support capability of a wind farm consisting of WT-EMC. |
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Keywords: | Variable speed wind turbine Synchronous generator Electromagnetic coupler Frequency support Droop control Inertial control |
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