风机整机国内外研究现状

1、Five-leg converter topology for wind energy conversion system with doubly fed induction generator Mahmoud Shahbazia, c, Philippe Poureb, , , Shahrokh Saadatea and Mohammad Reza Zolghadrica Groupe de Recherche en Electrotechnique et Electronique de Nancy (GREEN), Nancy Université, Nancy, Franceb

2、 Laboratoire dInstrumentation Electronique de Nancy (LIEN), Nancy Université, Nancy, Francec Center of Excellence in Power System Management and Control (CEPSMC), Sharif University of Technology, Tehran, IranReceived 13 December 2010; accepted 10 March 2011. Available online 22 April 2011. Abst

3、ractIn this paper, application of a five-leg converter in Doubly Fed Induction Generator (DFIG) for Wind Energy Conversion Systems (WECS) is investigated. The five-leg structure and its PWM control are studied and performances are compared with the classical six-leg topology. The main drawback of fi

4、ve-leg converter with respect to the six-leg back-to-back converter is the need to increase the dc-link voltage for the same operation point, i.e. the same powers in case of WECS. So, different methods for the reduction of the required dc-link voltage in the five-leg case are studied. The five-leg c

5、onverter is used to replace the conventional six-leg one, with the same ability. For the performance evaluation of this structure and its fully digital controller in a more realistic and experimental manner, Hardware in the Loop experiments is carried out. It is shown that efficient control of activ

6、e and reactive powers and dc-link voltage is performed. Hardware in the Loop results demonstrate the high performance of the proposed fully digital control which is implemented on an Altera FPGA target.Highlights Application of a five-leg converter in DFIG for Wind Energy Conversion Systems. Differe

7、nt methods for the reduction of the required dc-link voltage in this case. HIL experiment of the studied structure and its fully digital controller.Keywords: Wind energy conversion system (WECS); Five-leg converter; Doubly fed induction generator (DFIG); Hardware in the loop (HIL)磁悬浮风力发电机用磁力轴承的分析与设计

8、Analysis and Design of Magnetic Bearings Used in Magnetic Suspending Wind Power Generator轴承 , Bearing, 编辑部邮箱 , 2008年07期 【作者】 胡业发； 许开国； 张锦光； 吕辉榜； 【Author】 HU Ye-faa,XU Kai-guob,ZHANG Jin-guangb,LHui-bangb(a.Hubei Digital Manufacturing Key Laboratory;b.School of Mechanical and Electronic Engineering,W

9、uhan University of Technology,Wuhan 430070,China)【机构】 武汉理工大学湖北省数字制造重点实验室； 武汉理工大学机电工程学院； 武汉理工大学机电工程学院 武汉430070； 武汉430070； 【摘要】 设计了一种磁悬浮风力发电机的转子系统,径向方向采用磁力轴承支承,轴向方向靠机械力约束。采用有限元方法,对磁力轴承的结构和磁路进行了分析与设计,最后对磁力轴承的磁环高度h和叠加磁环个数n进行了优化。 更多还原【Abstract】 A rotor system of the magnetic suspending wind power generat

10、or is designed,which is supported with magnetic bearings in radial direction and constrained with mechanical force in axial direction.The structure and magnetic circuit of magnetic bearings is analyzed and designed with FEM,and then the optimization is carried on the height(h) and amount(n) of perma

11、nent-magnet ring used in permanent magnets bearings. 更多还原【关键词】 风力发电机； 磁力轴承； 磁路； 磁化方向； 【Key words】 wind power generator； permanent magnets bearings； magnetic circuit； magnetization direction； Design and control of a direct drive wind turbine equipped with multilevel converters Mohamed Abbesa, Jamel B

12、elhadja, b, , and Afef Ben Abdelghani Bennania, ca LSE-ENIT, P.O Box 37, Belvédère, 1002 Tunis, Tunisiab ESSTT, P.O. Box 56, Monfleury, 1008 Tunis, Tunisiac INSAT, P.O. Box 676, North Urban Centre, 1080 Tunis, TunisiaReceived 10 September 2008; accepted 18 October 2009. Available online 20

13、 November 2009. AbstractThis paper concentrates on the design and control of a three-level grid side converter (GSC) for direct drive high power wind turbines. The three-level, neutral point clamped (NPC) topology was investigated. The proposed control scheme, based on vector current control, offers

14、 very satisfying performances regarding to structure stability and grid connection requirements (GCR). In order to have an accurate evaluation of grid voltage source, two grid synchronization methods are developed and their performances are compared. The GSC performances are evaluated under both nor

15、mal and grid fault conditions. Simulation results show that stability is maintained during voltage dips and that the proposed direct drive wind turbine satisfies completely GCR.Improvement of the performances for wind energy conversions systems K. Ghedamsi, a, and D. Aouzellaga, a Department of Elec

16、trical Engineering, A. Mira University, 06000 Bejaïa, AlgeriaReceived 16 February 2009; revised 3 December 2009; accepted 23 February 2010. Available online 29 March 2010. AbstractIn this paper, a contribution to improvement of the performances for wind energy conversions systems (WECS) is inve

17、stigated. This paper introduces, on one hand, a direct ACAC matrix converter system as an alternative to the conventional ACDCAC converter configuration for the WECS and the two-quadrant operated mode of the DFIG, on the other one. The WECS considered is based to the wind turbine (aerodynamic), doub

18、ly-fed induction generator (DFIG), the AC/AC direct converter and the flywheel energy storage system (FESS). Simulation results obtained on the basis of the dynamic models of the wind generator are presented, for different operating points, to demonstrate the performance of the proposed system.Keywo

19、rds: Doubly-fed induction generator; Matrix converter; Variable speed wind turbine; Power control; Flywheel energy storage systemWind energy conversion with a variable-ratio gearbox: design and analysis John F. Halla, Christine A. Mecklenborga, Dongmei Chena, , and Siddharth B. Pratapba Department o

20、f Mechanical Engineering, University of Texas at Austin, Austin, TX 78712, USAb Center for Electromechanics, University of Texas at Austin, Austin, TX 78712, USAReceived 2 May 2010; accepted 23 August 2010. Available online 16 September 2010. AbstractVariable-speed wind turbines are able to adapt to

21、 low wind speeds and therefore have greater efficiency than fixed-speed turbines during partial-load operation. Unfortunately, the high cost and low reliability of the electronics that enable variation in speed have discouraged this mode of operation for distributed wind turbines. Alternatively, a Variable-Ratio Gearbox (VRG) can be integrated into the fixed-speed wind turbine to facilitate operation with a discrete set of variable speed