【作者】 钟坤炎；

【导师】 易灵芝；

【作者基本信息】 湘潭大学 ， 电力电子与电力传动， 2009， 硕士

【摘要】 随着能源问题和环境问题的日益突出,作为一种清洁的可再生能源,风力发电越来越受到人们的重视,同时,风力发电技术也成为各国学者竞相研究的热点。本文主要围绕开关磁阻电机(Switched Reluctance Motor,简称SRM)在风力发电领域中的应用,展开了较为全面的从理论研究到仿真分析的探索。首先,本文结合大量的文献资料,全面总结和分析当前风力发电及风力发电技术的发展现状和前景。提出开关磁阻电机适于风力发电的几大优势,进一步明确开发开关磁阻电机风力发电系统的意义。其次,对开关磁阻发电机系统(Switched Reluctance Generator System,简称SRG)的结构及工作原理进行阐述。介绍了SRG的两种工作模式,对SRG自励建压特性进行理论分析:讨论了SRG的各种数学模型;系统、深入地研究了SRG发电运行的控制方式;对开关磁阻风力发电系统的结构及控制方案进行探讨。其三,建立了SRG系统的数学模型,在此基础上用Matlab/Simulink仿真软件建立了SRG系统的非线性仿真模型,对SRG采用电流斩波控制方式;通过仿真,验证了SRG非线性模型的正确性,验证了在不同风力驱动下SRG能输出稳定电压,实现变速恒频风力发电,为风力发电提供有效的手段和工具。其四,提出了基于模糊自适应PID控制的SRG输出电压优化策略。针对常规PID控制的SRG输出电压性能差的缺点,在Matlab/Simulink中建立基于模糊自适应PID控制的SRG动态仿真模型。仿真结果证明:基于模糊自适应PID控制的SRG输出电压超调减小,输出电压平稳,在驱动转矩变化时,输出电压波动减小,由此提高了系统鲁棒性,得到更好的发电性能。其五,提出了基于电容滤波器优化的SRG输出电压脉动抑制的方法。该方法整个系统简单可靠,容易实现,在SRG速度变化大时电压脉动抑制效果也很好。仿真结果获得了一些有用的结论。更多还原

【Abstract】 Now, energy sources consume increasing daily and environment empoison being serious gradually, wind power, as renewable, no pollution source energy source, is paid great attention by more and more countries.The technologies also become research hotspot of many countries’s scholar.This paper mainly focuses on the application of switched reluctance generator in wind generation, and has done all-around study, from theory research to simulation analysis.Firstly, this paper summarized and analyzed the present and the prospective of wind generation and relative techniques based on a large number of referenced materials, presented the several advantages of SRG wind generation system, and further made the significance of developing this kind of system clear.Secondly, the basic theory of SRG is deeply studied in detailed. Two operation modes of SRG were pointed out, all the mathematic models of SR generator were discussed, and three control methods of SRG were pointed out. In addition, this part studied the structure, the idea of tracing and control scheme of the switched reluctance generator wind power, generation system.Thirdly, analyze the mathematical model of SRG and establish the nonlinear simulation model of SRG in Matlab / Simulink; Use current chopping control to the SRG; Through simulation, verify the correctness of SRG’s nonlinear model and also prove that the output voltage can be stable when wind drive is not constant, these achieve vscf wind power and also provide the effective means and tools for wind power.Fourthly,propose the optimization strategy of SRG’s output voltage based on fuzzy adaptive PID control. For the shortcomings of the poor performance of SRG’s output voltage which is base on traditional PID control,establish the dynamic simulation model of SRG which is based on fuzzy adaptive PID control in Matlab/Simulink; The simulation results verify that the SRG’s voltage overshoot is reduced and the SRG’s output voltage is more stable, which is based on fuzzy adaptive PID control ,and when the drive torque changes, the output voltage fluctuation of the SRG is also reduced .This control method improves the robustness of the system and gets better power generation performance.Fifthly, propose the method of SRG’s output voltage Pulse inhibition which is based on capacitor filter optimization.Using this method,the system is simple and reliable,and is als easy to be achieved. The effect of the SRG’S output voltage pulse inhibition is also very good when speed has large change.The simulation results obtain some useful conclusions.更多还原