永磁同步风力发电控制系统模型研究

发布时间：2018-03-26 04:00

本文选题：风力发电　切入点：随机切换　出处：《新疆大学》2017年硕士论文

【摘要】：随着世界能源危机的加剧以及环境污染的日益加重,人们开始寻找清洁环保的可再生能源去代替常规的化石能源.目前,在众多新型可再生能源中,开发利用风能发电是相对成熟的技术,适用于大规模的商业开发,因此风能作为一种绿色能源,在可再生能源领域内得到了迅猛发展.随着风电装机容量在整个电力系统的比重逐渐增大,风电机组的运行性能优劣和电能质量优劣对电网产生的影响,目前越来越受到世界的广泛关注.本文以风力发电系统中的永磁同步风力发电机风速随机切换系统的数学模型和电网侧变流器的数学模型为基础展开了研究,讨论了滑模变结构控制器对风速随机切换系统中的电机转速、有功和无功电流的高精度控制,变流器开关组变流过程对电流的非线性随机噪声扰动和非线性脉冲扰动的控制.本文主要内容概括如下:1.第一节,介绍了风力发电的研究背景.其次,给出了风力发电相关的发展研究现状及其运行原理.最后,给出了本篇文章的主要工作.2.第二节,主要讨论为了实现在风速随机切换下对电机转速、有功和无功电流的高精度控制,本文提出了风速随机切换永磁同步风力发电机的积分型滑模变结构控制的平滑控制策略.在Matlab/Simulink仿真环境下搭建了系统模型.结果表明,所提方法能够有效降低风速的随机切换以及负载扰动对直驱永磁同步风力发电机输出电流的扰动.3.第三节,本节研究了风力发电并网中带有非线性随机噪声扰动的同步控制问题.利用基尔霍夫定律得到了风力发电系统电网侧变流器的数学模型.设计了适当的反馈同步控制器,借助李雅普洛夫稳定性理论,验证了该同步控制器的有效性.进一步有效抑制由于电流并网产生的非线性随机扰动,使得风力发电机所产生的电流和电网所产生的电流同步.最后通过Matlab中的Simulink进行了仿真设计研究,验证了该理论结果的有效性.4.第四节,在第三节的基础上研究了大功率风力发电并网中带非线性脉冲扰动的同步控制问题,设计了适当的反馈同步控制器,借助李雅普洛夫稳定性理论,验证了该同步控制器的有效性,针对所研究的问题给出了相应的算法.最后通过Matlab中的Simulink进行了仿真设计研究,验证了该理论结果的有效性.
[Abstract]:With the aggravation of the world energy crisis and the increasing pollution of the environment, people begin to look for the clean and environmentally friendly renewable energy to replace the conventional fossil energy. At present, among the many new types of renewable energy, Wind power generation is a relatively mature technology for large-scale commercial development, so wind energy as a green energy, With the increasing proportion of wind power installed capacity in the whole power system, the operation performance and power quality of wind turbine have a great impact on the power network. At present, more and more attention has been paid to the wind power system in the world. Based on the mathematical model of wind speed random switching system of permanent magnet synchronous wind generator and the mathematical model of grid-side converter in wind power generation system, The high precision control of motor speed, active power and reactive current in wind speed random switching system by sliding mode variable structure controller is discussed. The control of nonlinear random noise disturbance and nonlinear impulse disturbance of current in converter switching system. The main contents of this paper are summarized as follows: 1. The first section introduces the research background of wind power generation. The research status and operation principle of wind power generation are given. Finally, the main work of this paper .2. the second section, mainly discusses the speed of the motor under the wind speed random switching. In this paper, a smooth control strategy of integrated sliding mode variable structure control for wind speed random switching permanent magnet synchronous wind generator is proposed. The system model is built in Matlab/Simulink simulation environment. The proposed method can effectively reduce the random switching of wind speed and the disturbance of load disturbance to the output current of direct-drive permanent magnet synchronous wind generator. In this section, the synchronization control problem with nonlinear random noise disturbance in wind power grid is studied. By using Kirchhoff's law, the mathematical model of grid-side converter in wind power generation system is obtained, and an appropriate feedback synchronous controller is designed. The validity of the synchronization controller is verified by using the Lyapunov stability theory, and the nonlinear random disturbance caused by the current connected to the grid is further effectively suppressed. The current generated by the wind turbine is synchronized with the current generated by the power grid. Finally, the simulation design of the wind turbine generator and the current generated by the grid is carried out through the Simulink in Matlab, which verifies the validity of the theoretical results. On the basis of the third section, the synchronization control problem with nonlinear impulse disturbance in high power wind power generation grid is studied, and an appropriate feedback synchronization controller is designed, with the aid of Lyapunov stability theory. The validity of the synchronization controller is verified, and the corresponding algorithm is given. Finally, the validity of the theoretical results is verified by the simulation design of Simulink in Matlab.
【学位授予单位】：新疆大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP273;TM315

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