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变速恒频风力发电系统风机转速非线性PID控制
引用本文:赵永祥,夏长亮,宋战锋,王慧敏,陈炜.变速恒频风力发电系统风机转速非线性PID控制[J].中国电机工程学报,2008,28(11):133-138.
作者姓名:赵永祥  夏长亮  宋战锋  王慧敏  陈炜
作者单位:天津大学电气与自动化工程学院,天津市南开区,300072
基金项目:国家自然科学基金项目(50777044);教育部新世纪优秀人才支持计划项目(NCET-06-0246);天津市应用基础及前沿技术研究计划重点项(07JCZDJC09400).
摘    要:针对变速风机非线性强、转动惯量大、转轴机械阻尼随转速变化的特点,提出了变速恒频风力发电系统风机转速非线性PID(nonlinear-PID, NLPID)控制策略,仿真研究表明,非线性PID控制响应快,超调小,受系统参数变化的影响较小,控制精度高,具有一定的适应性和鲁棒性。此外,该文设计了基于模糊规则切换的模糊PID-PID双模变桨距控制器,在此基础上对变速恒频风力发电系统在全风速范围内的运行进行了数字仿真研究。在高于额定风速时,通过变桨距控制器调节桨距角,系统能较好地将功率限制在额定值附近;在低于额定风速时,通过模糊推理,系统能够在免测风速的情况下给出转速参考信号,实现最大风能捕获或恒转速运行。

关 键 词:风力发电  最大风能捕获  变桨距  非线性PID控制器  模糊PID-PID双模控制
文章编号:0258-8013(2008)11-0133-06
收稿时间:2007-06-01
修稿时间:2007年12月12

Nonlinear PID Rotating Speed Control of Variable Speed Constant Frequency Wind Turbine System
HAO Yong-xiang,XIA Chang-liang,SONG Zhan-feng,WANG Hui-min,CHEN Wei.Nonlinear PID Rotating Speed Control of Variable Speed Constant Frequency Wind Turbine System[J].Proceedings of the CSEE,2008,28(11):133-138.
Authors:HAO Yong-xiang  XIA Chang-liang  SONG Zhan-feng  WANG Hui-min  CHEN Wei
Abstract:Strong nonlinearity, big moment of inertia and changing mechanical damping with rotating speed are the characters of wind turbine. A new nonlinear-PID (NLPID) controller for rotating speed control in variable speed constant frequency (VSCF) wind turbine system is proposed. Fast response, small overshoot, high precision, strong adaptability and highly robustness are obtained by the proposed strategy. A fuzzy PID-PID dual-mode variable pitch controller is designed. Based on these, the VSCF wind turbine system running in the whole working wind speed range is studied by simulations. With the action of fuzzy PID-PID dual-mode controller, system can keep the rated output power above rated wind speed; when wind speed is under the rated value, system can estimate the optimal rotating speed without test of wind speed by fuzzy controller and reach the maximum wind-energy capturing or keep the rotating speed constant.
Keywords:wind power generation  maximum wind energy capturing  adjustable-pitch  nonlinear-PID controller  fuzzy PID-PID dual-mode control
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