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| Sensorless Control of MW-Level Direct-Drive Permanent Magnet Wind Generator |
| Tang Fen, Jin Xinmin, Jiang Jiuchun, Tong Yibin, Zhou Fei |
| Beijing Jiaotong University Beijing 100044 China |
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Abstract Given the characteristics of MW-level direct-drive permanent magnet synchronous generator (PMSG), a sensorless zero d-axis current control (ZDAC) method with rotor flux position observation based on U-I model is proposed. Its implementation principle is introduced in detail. Furthermore, double integrator with a saturable feedback based on coordinate transforming is discussed in depth. Finally, simulation and experimental results on a 2MW “back to back” PWM converter prototype indicate the feasibility of the method. Results also show its excellent steady and dynamic performance as well as easy implementation.
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Received: 21 December 2009
Published: 07 March 2014
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2011, Vol. 26 
