摘要本文基于风力机模拟实验平台，针对风力机模拟器转动惯量补偿算法进行实验研究。该平台通过动态转矩补偿的方式实现了以小转动惯量模拟大转动惯量的实际风力机。但是在分析实验结果后发现风力机模拟器运行发散，即模拟结果出现失效的现象。本文通过建立风力机模拟器转动惯量补偿部分的数学模型并对风力机模拟器转动惯量补偿部分进行稳定性分析，发现风力机模拟器运行结果和实际机组与模拟机组的转动惯量比值有关，提出一般风力机模拟器对实际风机的模拟是有局限性的。为模拟大转动惯量实际风机，通过理论分析得出可在补偿环节添加一阶低通滤波器从而使模拟机组能模拟大转动惯量的实际机组且使结果不失效，进而找出了失稳现象的原因并提出改进策略。在Matlab/Simulink 上构建了风力机模拟器模型，通过仿真验证了失效原因和所提改进措施的有效性，并通过实验证明了改进措施的有效性和理论分析的正确性。 41649
毕业论文关键词 风力发电 风机模拟器 转动惯量补偿 转矩补偿 低通滤波器
Title The Design and Implemention of Inertia Compensation Algorithms in Wind Turbine System
Abstract In order to emulate the real wind energy conversion system(WECS) so as to carry out the experiments of wind turbine(WT), wind turbine simulator(WTS) platform was constructed. The platform is used to achieve the purpose of simulating a large moment of inertia real wind turbine by small moment of inertia platform through dynamic torque compensation. But the results of the experiment shows that there exists the presence of running pergence of wind turbine simulators which makes us cannot carry out the experiments as we expected. Through the establishment of the mathematical models of the inertia compensation of wind turbine simulators and the stability analysis, we found that the outputs revolves with the ratio of moment inertia in WT and WTS, so we can emulate the real WT with large moment of inertia using WTS by designing first-order low-pass filter(LPF).Then at last we find out the reasons for the instability phenomenon and propose the improvement strategies. Finally the simulation as well as experiments validate the failure causes and effectiveness of improvement measures.
Keywords wind power wind turbine simulator moment of inertia compensation low-pass filter
目次
1绪论...1
1.1选题背景和意义...1
1.1.1选题背景...1
1.1.2该选题意义.2
1.2关于风力机模拟器转动惯量补偿算法的研究现状...2
1.3本论文的主要工作.3
2风力机模拟器数学模型...4
2.1风力发电机的工作原理..4
2.2带转动惯量补偿的风力机模拟器模型..5
2.3系统仿真结果和实验结果...7
2.3.1带补偿环节的风机模拟器Simulink仿真.7
2.3.2仿真结果分析9
2.4对系统不稳定现象的分析和验证.12
2.4.1对转矩补偿环节的重新建模...12
2.4.2含补偿转矩环节的风机模拟器稳定性分析...13
2.4.3Simulink仿真和实验验证.14
2.5本章小结.16
3风力机模拟器失效现象的改进措施17
3.1对风力机模拟器所建数学模型的深入分析.17
3.1.1对离散频域风力机模型的分析.17
3.2改进的风力机模拟器的数学模型和系统框图...18
3.3改进后的风力机模拟器稳定性分析...20
3.4本章小结.20
4改进的风机模拟器稳定性仿真和实验验证..21
4.1改进后的风力机模拟器Matlab/Simulink仿真.21
4.2改进后的风力机模拟器稳定性实验验证...26
4.3本章小结.35
5结论...36
致谢.37
参考文献..38
附录.40 风力机模拟器转动惯量补偿算法的设计与实现:http://www.751com.cn/zidonghua/lunwen_41768.html