Abstract：The dual stator-winding induction generator(DWIG) wind power system output high DC voltage over a wide wind speed by means of the parallel structure. The DC bus of the static excitation converter(SEC) on the control side is connected with the output terminal of the rectifier bridge on the power side through a unidirectional diode. In consideration of the new topology and the particular control strategy, the change law of the control-winding current under two operation situations is analyzed in detail in this paper. On that basis, the optimal scheme of excitation capacitor for the new system is investigated to minimize the capacity of SEC. According to simulation results of the influence on the control-winding current by excitation capacitor, the circulation calculation and experimental verification are employed to achieve the optimal excitation capacitor and switchover motor speed. Experimental results demonstrate the accuracy and effectiveness of the optimization scheme. Keeping the capacity of SEC still one third of the rated power, the new system achieved in operating over a wide speed range and exploiting wind energy under low wind speed.
施凯, 黄文新, 胡育文, 卜飞飞. 宽风速运行的定子双绕组感应电机风力发电系统励磁电容的优化方案[J]. 电工技术学报, 2012, 27(7): 86-93.
Shi Kai, Huang Wenxin, Hu Yuwen, Bu Feifei. Optimal Scheme of Excitation Capacitor for Dual Stator-Winding Induction Generator Wind Power System Over a Wide Wind Speed. Transactions of China Electrotechnical Society, 2012, 27(7): 86-93.
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