小型开关磁阻风力发电机系统研究
发布时间：2018-12-09 11:19
【摘要】：本文首先介绍了小型开关磁阻风力发电机系统的研究背景、研究现状以及结构特点,给出了开关磁阻发电机在直流微网中的构成形式。其次,针对一台三相12/8结构的开关磁阻发电机,通过实验获取了四个关键位置的磁链数据,得到了其磁链方程,在此基础上给出了转矩方程、电压方程和运动方程,搭建了其数值仿真模型并进行了验证。然后,给出了网侧电压波动的线性分析模型,利用非线性模型对相电流峰值进行了定量分析,给出了限制电流峰值的方法,并分析了系统稳态运行点的转移。接着,本文给出了开关磁阻风力发电机的系统硬件组成,分析了基于速度扰动的变步长最大功率跟踪方法实现过程,以及与电压闭环协调控制实现功率平衡控制的方法,并针对以TMS320F28335为核心的控制器,设计了软件流程图。最后,利用搭建的仿真模型对系统控制策略进行了可行性验证,并在样机实验平台上进行了实验验证。仿真和实验结果表明本文给出的最大功率跟踪方法能快速实现最大风能捕获,提高风速变化下系统稳定性;给出的功率平衡控制方法在保证直流母线电压稳定的前提下,能实现风能最大化地利用。
[Abstract]:This paper first introduces the research background, research status and structure characteristics of the small switched reluctance wind turbine system, and gives the form of the switched reluctance generator in the DC microgrid. Secondly, for a three-phase switched reluctance generator with 12 / 8 structure, the flux data of four key positions are obtained experimentally, and the flux equations are obtained. On this basis, the torque equation, voltage equation and motion equation are given. The numerical simulation model is built and verified. Then, the linear analysis model of voltage fluctuation on the grid side is given, the phase current peak value is quantitatively analyzed by using the nonlinear model, the method of limiting the peak current value is given, and the steady state operating point transfer of the system is analyzed. Then, the hardware structure of switched reluctance wind turbine is given, and the realization process of variable step maximum power tracking method based on velocity disturbance is analyzed, and the method of power balance control is realized in coordination with voltage closed loop control. The software flow chart is designed for the controller based on TMS320F28335. Finally, the feasibility of the system control strategy is verified by using the simulation model, and the experimental verification is carried out on the prototype experimental platform. The simulation and experimental results show that the maximum power tracking method presented in this paper can quickly realize the maximum wind energy capture and improve the stability of the system under the wind speed change. The proposed power balance control method can maximize the utilization of wind energy on the premise that the DC bus voltage is stable.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM315
本文编号：2369293
[Abstract]:This paper first introduces the research background, research status and structure characteristics of the small switched reluctance wind turbine system, and gives the form of the switched reluctance generator in the DC microgrid. Secondly, for a three-phase switched reluctance generator with 12 / 8 structure, the flux data of four key positions are obtained experimentally, and the flux equations are obtained. On this basis, the torque equation, voltage equation and motion equation are given. The numerical simulation model is built and verified. Then, the linear analysis model of voltage fluctuation on the grid side is given, the phase current peak value is quantitatively analyzed by using the nonlinear model, the method of limiting the peak current value is given, and the steady state operating point transfer of the system is analyzed. Then, the hardware structure of switched reluctance wind turbine is given, and the realization process of variable step maximum power tracking method based on velocity disturbance is analyzed, and the method of power balance control is realized in coordination with voltage closed loop control. The software flow chart is designed for the controller based on TMS320F28335. Finally, the feasibility of the system control strategy is verified by using the simulation model, and the experimental verification is carried out on the prototype experimental platform. The simulation and experimental results show that the maximum power tracking method presented in this paper can quickly realize the maximum wind energy capture and improve the stability of the system under the wind speed change. The proposed power balance control method can maximize the utilization of wind energy on the premise that the DC bus voltage is stable.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM315
【参考文献】
相关硕士学位论文 前1条
1 张慧;开关磁阻发电机系统的研究[D];浙江大学;2003年
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