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Dynamic Modelling and Robust Control of a Wind Energy Conversion System

Steinbuch, Maarten

ISBN 10: 909003143X / ISBN 13: 9789090031439
Published by The Netherlands, 1989
Used Condition: Near Fine Soft cover
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204 Pages. Previous owner's last name on first half-title page. Dr. Steinbuch's Philips Research business card is taped to front endpapoer. No other marks or stamps to this tight bright book with flawless interior text pages. The application of wind energy conversion systems for the production of electrical energy requires a cheap and reliable operation. Especially at high wind velocities fluctuations from the wind field result in large mechanical loads of the wind turbine. Also fluctuations in the grid voltage may yield large dynamic excitations. In order to realize a long lifetime and a reliable operation active control systems are necessary. The main goal of this study in this thesis is to develop an approach for the design of a high performance control system for a wind turbine with variable speed. The wind turbine system under investigation has a three-bladed rotor which is connected to the generator by a transmission. The electrical conversion system consists of a synchronous generator with a rectifier, direct current transmission and an inverter. The manipulable inputs are the pitch angle of the turbine blades, the field voltage of the generator and the delay angle of the rectifier. Both the generator speed and the direct current are being measured. The control design problem at full load is to minimize fluctuations in speed and current while reducing the mechanical fatigue loads. The feedback system should realize this without excessive use of the input variables and must also be simple to implement. In order to be able to design a high performance control system a high quality dynamic model is required. Much attention has been given to the modelling of the electrical conversion system. The switching of the thyristors of the rectifier bridge results in periodic behaviour at a high frequency. In order to design a control system an averaged model has been derived through the application of Floquet theory for periodic systems. The properties of the aerodynamic transfer and of the drive train only have been approximately modelled. Deviations of these nominal models from the real system are accounted for using norm-bounded uncertainty models. Using the nominal model and the uncertainty models the control system design has been carried out. Size: 6 1/4" x 9 1/4". Bookseller Inventory # 14191

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Title: Dynamic Modelling and Robust Control of a ...

Publisher: The Netherlands

Publication Date: 1989

Binding: Trade Paperback

Book Condition:Near Fine

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