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基于双PWM协调控制的双馈风力发电机组非线性因素分析

发表时间:2011-08-31  浏览量:1248  下载量:594
全部作者: 张豪,叶予光,邵国庆
作者单位: 中国矿业大学信息与电气工程学院;平顶山学院电气信息工程学院
摘 要: 基于双脉宽调制(pulse-width modulation,PWM)变换器协调控制的双馈风力发电机组模型,通过对双馈感应电机在三相静止坐标系与两相同步旋转坐标系下的数学模型对比分析,指出变速恒频风力发电机中存在非线性因素,并且旋转坐标变换可以使系统非线性因素明显减小。然后对发电机组的交流励磁电源主流控制方案进行分析,指出用矢量控制这种线性控制理论不能从根本上解决双馈发电机组中存在的非线性问题。最后探讨非线性解耦控制策略,为进一步优化变速恒频双馈风力发电系统的性能指明方向。
关 键 词: 电气工程;双馈风力发电机组;坐标变换;矢量控制;非线性解耦控制;非线性因素
Title: Analysis on nonlinear factors of doubly fed wind turbine generator system based on double PWM coordinated control
Author: ZHANG Hao, YE Yuguang, SHAO Guoqing
Organization: School of Information and Electrical Engineering, China University of Mining and Technology; College of Physics & Electric-Information Engineering, Pingdingshan University
Abstract: Based on a variable speed constant frequency doubly fed wind turbine generator model, which is controlled by double pulse-width modulation (PWM) converter, a comparative analysis on a doubly fed induction generator’s mathematical model under three-phase static coordinate system and two-phase synchronization reference frame was carried out in this paper. It pointed out the nonlinear factors which exist in the variable speed constant frequency wind generator, and found that the nonlinear factors can be obviously decreased by coordinate transformation. Further more, by an analysis on a mainstream control scheme of AC-excited power supply for the wind turbine generator, it pointed out that the nonlinear factors which exist in doubly fed wind turbine generator can’t be completely solved by using vector control system’s linear control theory. Finally, some nonlinear decoupling control strategies were discussed and the method for further optimization of variable speed constant frequency doubly fed wind power generator system’s function was pointed out.
Key words: electric work; doubly fed wind turbine generator system; coordinate transformation; vector control; nonlinear decoupling control; nonlinear factors
发表期数: 2011年8月第16期
引用格式: 张豪,叶予光,邵国庆. 基于双PWM协调控制的双馈风力发电机组非线性因素分析[J]. 中国科技论文在线精品论文,2011,4(16):1525-1530.
 
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