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| Topology and Control Strategies of Dual Stator-Winding Induction Generator Wind Power System Over a Wide Wind Speed Range |
| Shi Kai1, 2, Huang Wenxin1, Hu Yuwen1, Bu Feifei1 |
| 1. Nanjing University of Aeronautics and Astronautics Nanjing 210016 China 2. Jiangsu University Zhenjiang 212013 China |
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Abstract This paper presents a novel dual stator-winding induction generator (DWIG) wind power system applicable to wide wind speed operation, whose specialty is that the output terminal of the excitation converter on the control side is connected with the power side in parallel through a unidirectional diode. The DC bus voltage of the excitation converter on the control side is pumped to the given value under low wind speed. The electric energy is outputted from the DC bus. These broaden the utilization ability of the wind energy under low wind speed. In the high wind speed area, the output voltage on the power side rises to the set value and is maintained constant by modulating the reactive current from the excitation converter. The electric energy transmission is fulfilled by the rectifier on the power side because of the diode’s turn-off. The topology and the control scheme together make the DWIG output the given high DC voltage over a wide wind speed range and simplify the structure and control of the latter grid-connected inverter. Experimental results on a 37kW/DC 600V prototype are provided to demonstrate the effectiveness and accuracy of the proposed theoretical analysis and control strategies.
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Received: 21 March 2011
Published: 20 March 2014
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2012, Vol. 27 
