混合驱动型永磁风力机的非线性控制研究
发布时间：2019-03-07 20:46
【摘要】：实现最大功率追踪(MPPT)和变速恒频(VSCF)是风力发电的两个根本问题。本文以混合驱动型永磁风力发电机为研究对象,研究了该类型的风力机实现上述两个关键技术的非线性动力学与控制问题,完成了如下的工作:首先,建立了混合驱动永磁伺服电机永磁气隙-气动双耦合的非线性模型,分析了参数变化时,系统出现混沌现象的发生机理与发生条件,设计了无源控制器,以实现消除混沌运动的目的。其次,建立了以混合驱动系统为核心的考虑联轴器刚度和阻尼的动力学模型。在此基础上,进一步研究建立了空气动力学模型、主发电机模型、永磁伺服电机控制模型、风速模型、桨距角控制系统模型等。为了简化问题,突出空气动力学的非线性特性,其余模型均通过简化分析与假设建立了线性模型,只保留空气动力学非线性特性,得到了整体混合驱动发电系统的非线性模型。第三,针对上述系统非线性模型,运用模糊控制的知识,提出了高风速时功率平衡的控制策略,并设计了模糊PID控制器,仿真结果表明控制系统很好的实现了控制目标。第四,基于反馈线性化控制理论,设计了混合驱动永磁风力机系统非线性方程的反馈线性化模型,并求出最终的非线性反馈控制律,仿真结果表明控制系统实现了系统的控制目标。
[Abstract]:The realization of maximum power tracking (MPPT) and variable speed constant frequency (VSCF) are two fundamental problems of wind power generation. In this paper, the nonlinear dynamics and control of the hybrid driven permanent magnet wind turbine are studied. Firstly, the following works are done: firstly, the nonlinear dynamics and control of the two key technologies mentioned above are studied. A nonlinear model of permanent magnet air gap-pneumatic dual coupling with hybrid drive permanent magnet servo motor is established. The mechanism and conditions of chaos in the system are analyzed when the parameters change, and the passive controller is designed. In order to achieve the purpose of eliminating chaotic motion. Secondly, a dynamic model considering coupling stiffness and damping based on hybrid drive system is established. On this basis, the aerodynamic model, the main generator model, the permanent magnet servo motor control model, the wind speed model, the pitch angle control system model and so on are further studied and established. In order to simplify the problem and highlight the nonlinear characteristics of aerodynamics, the linear models are established by simplifying the analysis and assumptions, and only the nonlinear characteristics of aerodynamics are retained, and the nonlinear models of the whole hybrid drive power generation system are obtained. Thirdly, according to the nonlinear model of the above-mentioned system, the control strategy of power balance at high wind speed is proposed by using the knowledge of fuzzy control, and the fuzzy PID controller is designed. The simulation results show that the control system achieves the control objective very well. Fourthly, based on the feedback linearization control theory, the feedback linearization model of the nonlinear equation of the hybrid drive permanent magnet wind turbine system is designed, and the final nonlinear feedback control law is obtained. The simulation results show that the control system realizes the control goal of the system.
【学位授予单位】：西安理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP273;TM315
[Abstract]:The realization of maximum power tracking (MPPT) and variable speed constant frequency (VSCF) are two fundamental problems of wind power generation. In this paper, the nonlinear dynamics and control of the hybrid driven permanent magnet wind turbine are studied. Firstly, the following works are done: firstly, the nonlinear dynamics and control of the two key technologies mentioned above are studied. A nonlinear model of permanent magnet air gap-pneumatic dual coupling with hybrid drive permanent magnet servo motor is established. The mechanism and conditions of chaos in the system are analyzed when the parameters change, and the passive controller is designed. In order to achieve the purpose of eliminating chaotic motion. Secondly, a dynamic model considering coupling stiffness and damping based on hybrid drive system is established. On this basis, the aerodynamic model, the main generator model, the permanent magnet servo motor control model, the wind speed model, the pitch angle control system model and so on are further studied and established. In order to simplify the problem and highlight the nonlinear characteristics of aerodynamics, the linear models are established by simplifying the analysis and assumptions, and only the nonlinear characteristics of aerodynamics are retained, and the nonlinear models of the whole hybrid drive power generation system are obtained. Thirdly, according to the nonlinear model of the above-mentioned system, the control strategy of power balance at high wind speed is proposed by using the knowledge of fuzzy control, and the fuzzy PID controller is designed. The simulation results show that the control system achieves the control objective very well. Fourthly, based on the feedback linearization control theory, the feedback linearization model of the nonlinear equation of the hybrid drive permanent magnet wind turbine system is designed, and the final nonlinear feedback control law is obtained. The simulation results show that the control system realizes the control goal of the system.
【学位授予单位】：西安理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP273;TM315
【参考文献】
相关期刊论文 前6条
1 林勇刚;王贤成;王菁;刘宏伟;韩利坤;李伟;;基于液压传动的离网型风力机“变速恒频”控制研究[J];太阳能学报;2014年10期
2 朱成党;涂乐;林勇刚;刘宏伟;李伟;;风电机组的机械液压混合传动技术[J];浙江大学学报(工学版);2014年10期
3 曾U喺，
本文编号：2436446
本文链接：https://www.wllwen.com/kejilunwen/zidonghuakongzhilunwen/2436446.html
