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题名	变速风力机的最大风能捕获控制技术研究; 变速风力机的最大风能捕获控制技术研究
作者	1赵佩宏,电工研究所
学位类别	硕士
答辩日期	2008-12-22
授予单位	中国科学院电工研究所
导师	1鄂春良,电工研究所
关键词	风力发电机组 变速变桨距 最大风能捕获 风力机模拟 Wind Power Generation System (WPGS), variable speed variable pitch, maximum power capture, wind turbine emulator
其他题名	变速风力机的最大风能捕获控制技术研究
中文摘要	风力发电机组是一种将风能转化成电能的能量转换系统，提高系统的能量转换效率是控制系统开发重要目标之一。本文以提高风力机的风能捕获效率为目的，以变速变桨距风电机组为研究对象，分析了其技术特点和运行特性，对其变速控制策略进行了深入的理论研究和仿真分析，并对其实验验证手段（风力机模拟技术）进行了探索。 本文首先建立了风力发电机组全系统的数学模型，为了便于控制系统的分析和设计，对模型进行了简化处理。在此基础上，通过数值分析的方法，分析了风力机的运行特性。其次，结合风力机的风能捕获原理和运行条件的限制，提出了分段控制的总体控制策略，在全风速范围内最大限度地捕获风能。为了解决最佳叶尖速比控制受控制器参数影响的问题，提出了自寻优控制策略。为了提高系统运行的稳定性，又提出了变速与变桨协调控制的技术作为分段控制的补充。所提控制算法以转速作为输入信号，不依赖于风速信号的测量精度，实现简单。再次，在MATLAB/Simulink仿真软件中建立了系统的仿真模型，模型是一个连续和离散时间的混合模型，风力机、传动链和发电机都是连续时间模型，而控制器是离散时间模型，与实际系统非常相似。针对每一种控制算法分别采用阶跃风速和紊流风速信号进行了仿真，仿真结果验证了控制算法的可靠性和有效性。本文还采用风力发电领域的专业计算软件Bladed对控制算法进行了仿真验证，仿真结果同样证明了控制算法稳定性和有效性，同时，Bladed仿真结果也表明本文在MATLAB中建立的仿真模型在验证最大风能捕获控制算法上是可靠的。 最后，本文还对作为控制算法实验研究手段的风力机模拟技术进行了探讨。本文结合风电机组的运行特点和工作环境要求，分析了风力机模拟技术研究的必要性和可行性。并以实验室22kW双馈风力发电拖动实验平台为基础，提出了风电机组的全系统模拟方案，设计了模拟系统的监控软件和直流电动机调速系统，并对模拟系统进行了初步的实验研究，实验结果验证了所提风力机模拟方法的可行性。风力机模拟系统为后续风电机组控制系统的研究奠定了实验基础。 Wind Power Generation System (WPGS) is used to convert the wind power to electric power. Increasing the system’s efficiency is one of the important subjects of the development of control subsystem. This dissertation is engaged in increasing the efficiency of the variable speed variable pitch WPGS. The technical and operation characteristics of the system are analyzed and the control schemes are researched in theory and simulation. And then, the emulation of WPGS in lab is also explored in order to verify the affectivity of the control scheme. The mathematic model of the WPGS is built at first and then simplified to facilitate the development and analysis of control system. The operation characteristics of the system are analyzed numerically. In order to improve the capture of wind power, the novel grading control strategy is proposed based on the aerodynamic characteristics and operation limits of wind turbine. An adaptive search control strategy is proposed to resolve the energy loss caused by parameters accuracy. And the coordinate control of torque and pitch is proposed to improve the stability of the grading control strategy. The new control strategy is easy to realize for its input signal is revolution speed rather than wind speed. The simulation model is established in MATLAB/Simulink. The model is a continuous and discrete-time hybrid model, wind turbine, generator and drive-train are continuous-time models, and the controller is a discrete-time model, which is very similar to the actual system. The simulation is conducted for each control strategy in different wind situations. The results show the reliability and affectivity of the proposed control strategy. Simulations are also conducted in the professional software Bladed, and the results show the reliability of the MATLAB simulation model as same as the stability of the control strategy. Finally, the emulation of wind turbine is discussed as an experimental method. The necessity and feasibility of wind turbine emulation are analyzed and an emulation scheme is proposed based on the 22kW Doubly-Fed Induction Generation (DFIG) system in the laboratory. The supervisor control and data acquisition system is programmed and the speed regulation system of the DC motor is designed. Experiment is conducted to verify the feasibility of the proposed emulation scheme. The wind turbine emulator provides experimental foundation for the development of control subsystem.
语种	中文
公开日期	2010-10-18
页码	76
分类号	TM1;TM921
内容类型	学位论文
源URL	[http://ir.iee.ac.cn/handle/311042/7161]
专题	电工研究所_其他部门_其他部门_硕士学位论文
推荐引用方式 GB/T 7714	1赵佩宏,电工研究所. 变速风力机的最大风能捕获控制技术研究, 变速风力机的最大风能捕获控制技术研究[D]. 中国科学院电工研究所. 2008.

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