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Encoderless Model Predictive Control of Back-to-Back Converter Direct-Drive Permanent-Magnet Synchronous Generator Wind Turbine Systems
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| Author(s) |
Christoph HACKL, Fengxiang WANG, Zhenbin ZHANG, Christoph HACKL, Ralph KENNEL, Zhe CHEN |
| Abstract |
This paper presents encoderless model predictive control scheme with time-varying sliding mode ob-server for a complete wind turbine system. The wind turbine system consists of a back-to-back converter (AC/DC/AC) and a direct-drive permanent-magnet synchronous generator (PMSG). We give a complete model of the system and present encoderless fixed-frequency model predictive direct torque control of the generator and finite-set model predictive direct power control of active and reactive power on the grid side. The sliding mode observer utilizes a time-varying switching gain and a time-varying cut-off frequency to estimate rotor position and rotor speed without chattering. The proposed strategy is illustrated by simulations as a first proof of concept. The simulation results show that the proposed strategy achieves fast torque control dynamics and highly decoupled control of active and reactive power. |
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| Filename: | 0405-epe2013-full-22200192.pdf |
| Filesize: | 447.8 KB |
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| Type |
Members Only |
| Date |
Last modified 2014-02-09 by System |
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