An improved reduced-order model of an electric pitch drive system for wind turbine control system design and simulation |
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| Affiliation: | 1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China;2. State Grid Jibei Electric Power Co., Ltd., Qinhuangdao Power Supply Company, Qinhuangdao 066000, China;3. Institute of Energy Technology, Aalborg University, Aalborg East DK-9220, Denmark;1. Atmospheric Research Team, Institute for Environmental Research and Sustainable Development, National Observatory of Athens, 11810 Athens, Greece;2. Collaborator of National Observatory of Athens on Contract to KRIPIS-THESPIA Programme, Greece;3. Aryabhatta Research Institute of Observational Science, Nainital 263 001, India;4. School of Natural Sciences, Shiv Nadar University, Tehsil Dadri 203207, India;1. BIOENERGY 2020+ GmbH, Location Wieselburg, Gewerbepark Haag 3, A-3250 Wieselburg-Land, Austria;2. Graz University of Technology, Institute of Thermal Engineering – Thermal Energy Systems and Biomass, Inffeldgasse 25/B, A-8010 Graz, Austria;3. University of Applied Forest Sciences Rottenburg, Schadenweilerhof, D-72108 Rottenburg am Neckar, Germany;1. School of Energy, Power and Mechanical Engineering, North China Electric Power University, Changping District, Beijing 102206, China;2. School of Control and Computer Engineering, North China Electric Power University, Changping District, Beijing 102206, China;1. Department of Mechanical Engineering, Azadshahr Branch, Islamic Azad University, Azadshahr, Iran;2. Department of Thermal and Fluids Engineering, Faculty of Mechanical Engineering, State University of Campinas (UNICAMP), Campinas, Brazil;3. Department of Mechanical Engineering, Universidade Federal de Minas Gerais (UFMG), BH, Brazil |
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| Abstract: | To obtain satisfactory dynamic characteristics and enhance numerical simulation efficiency, an improved reduced-order transfer-function model of an electric pitch drive system (EPDS) for a wind turbine is proposed. First, a detailed transfer-function model of an EPDS is developed on the basis of its mathematical model. Thereafter, the improved reduced-order transfer-function model for an EPDS is derived from the detailed model by transfer-function approximation, sensitivity analysis, and block diagram reduction. The frequency-domain characteristics of the proposed model and their effects on the stability of the pitch angle control system are also analyzed and compared with that of a first-order transfer-function model. Finally, the dynamic characteristics of an EDPS using the improved model are analyzed and verified by a practical EPDS test platform. Furthermore, based on the FAST–MATLAB/Simulink co-simulation tool, simulation comparisons are performed on the loading characteristics of a wind turbine to further validate its availability in it. Results show that the improved model is superior to the first-order model for the performance analysis of a wind turbine pitch angle controller, and it also can meet the requirements of large-scale loading simulations for wind turbines both in terms of the precision and the time efficiency. |
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| Keywords: | Electric pitch drive system Loading simulations Pitch angle controller design Reduced-order model Wind turbines |
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