摘要
依据双馈风力发电机组二阶数学模型,研究风电机组在高于额定风速时的输出功率恒定问题;应用反馈线性化及最优控制理论,给出风机状态变量反馈线性化控制律的形式;在定义跟踪误差的基础上,设计出最优跟踪控制器。利用Matlab/Simulink仿真软件搭建仿真平台,验证所设计控制器的正确性和有效性。与传统的PI(比例积分)变桨距控制相比,在随机风、突变风及渐变风下,所设计的变桨距最优控制器都能够较好地保持输出功率基本恒定,具有较强的鲁棒性。
A mathematical model of second-order for a doubly-fed induction wind generator was established to deal with the problem of inconstant output of the wind generator when wind speed is higher than the rated wind speed. According to the feedback linearization and the optimal control theory, the presentation of the state feedback linearization control law was given. In addition, the optimal tracking controller was designed on the basis of the definition of tracking errors. By using Matlab/Simulink software as a simulation platform, the correctness and efficiency of the designed controller was verified. Comparing with traditional PI control, no matter what changes the wind speed has. the proposed optimal controller is able to better keep the output basically constant and behave robustly.
出处
《中国电力》
CSCD
北大核心
2013年第2期93-97,共5页
Electric Power
基金
新疆维吾尔自治区高技术研究发展计划资助项目(201132116)
关键词
双馈风力发电机组
变桨距控制
最优跟踪控制器
反馈线性化
二阶数学模型
doubly-fed induction wind power generator
variable-pitch control
the optimal tracking controller
feedback linearization
second-order mathematical model
