基于滑模鲁棒控制的风力发电系统研究
发布时间：2018-07-17 02:37
【摘要】：风电技术由于其优越的环保性能和相对较低的成本,近年来发展迅速,并在发电规模和技术研发上都取得了长足的发展,按照目前的发展趋势,根据有关专家预测在不足十年的时间内将成为火力和水利发电之后的第三大能源系统。由于其所具有的以上优点和迅猛的发展势头使其成为目前世界发电领域的研究热点。本文通过参考大量有关风力发电技术的国内外文献,对双馈风力发电机的系统建模,励磁控制优化进行了深入研究。分析研究了风力机的运行原理和数学模型,推导出了简化数学模型,并依此为基础开展了矢量控制方式的相关研究。建立了PWM电压型变流器的仿真模型网侧变流器的数学模型、转子侧变流器的数学模型。本文分析了风力机特性和功率特性,提出了一种不依赖于风速测量来实现双馈风力发电系统最大功率点追踪(MPPT)控制的策略,使追踪与捕获最大风能成为可能。建立了变速恒频双馈风力发电仿真模型,并网仿真模型,短路故障仿真模型,提出一种基于结合模糊逻辑与滑模变结构技术的新型风电系统鲁棒控制方法,并进行了滑模面及控制律设计,在Matlab/Simulink仿真平台上对系统进行仿真分析,验证文中所研究方法的正确性。本文的研究对于推广绿色能源技术、节能减排具有重要理论及实际意义。
[Abstract]:Wind power technology has developed rapidly in recent years because of its superior environmental performance and relatively low cost, and has made great progress in power generation scale and technology research and development, according to the current development trend. Experts predict it will be the third largest energy system after thermal and hydroelectric power generation in less than a decade. Because of its advantages and rapid development, it has become a research hotspot in the field of power generation in the world. In this paper, the system modeling and excitation control optimization of doubly-fed wind turbine are studied by referring to a large number of domestic and foreign literatures on wind power generation technology. The operating principle and mathematical model of the wind turbine are analyzed and the simplified mathematical model is derived. Based on this the related research of vector control mode is carried out. The simulation model of PWM voltage source converter the mathematical model of grid-side converter and the mathematical model of rotor side converter are established. In this paper, the characteristics and power characteristics of wind turbine are analyzed, and a strategy of maximum power point tracing (MPPT) control for doubly-fed wind power generation system is proposed, which is independent of wind speed measurement, which makes it possible to track and capture the most windy wind. The simulation model of variable speed constant frequency doubly-fed wind power generation, grid-connected simulation model and short-circuit fault simulation model are established. A new robust control method for wind power system based on fuzzy logic and sliding mode variable structure technology is proposed. The sliding-mode surface and control law are designed, and the simulation analysis of the system is carried out on Matlab / Simulink simulation platform, which verifies the correctness of the method studied in this paper. The research in this paper has important theoretical and practical significance for promoting green energy technology and energy saving and emission reduction.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM614
本文编号：2128641
[Abstract]:Wind power technology has developed rapidly in recent years because of its superior environmental performance and relatively low cost, and has made great progress in power generation scale and technology research and development, according to the current development trend. Experts predict it will be the third largest energy system after thermal and hydroelectric power generation in less than a decade. Because of its advantages and rapid development, it has become a research hotspot in the field of power generation in the world. In this paper, the system modeling and excitation control optimization of doubly-fed wind turbine are studied by referring to a large number of domestic and foreign literatures on wind power generation technology. The operating principle and mathematical model of the wind turbine are analyzed and the simplified mathematical model is derived. Based on this the related research of vector control mode is carried out. The simulation model of PWM voltage source converter the mathematical model of grid-side converter and the mathematical model of rotor side converter are established. In this paper, the characteristics and power characteristics of wind turbine are analyzed, and a strategy of maximum power point tracing (MPPT) control for doubly-fed wind power generation system is proposed, which is independent of wind speed measurement, which makes it possible to track and capture the most windy wind. The simulation model of variable speed constant frequency doubly-fed wind power generation, grid-connected simulation model and short-circuit fault simulation model are established. A new robust control method for wind power system based on fuzzy logic and sliding mode variable structure technology is proposed. The sliding-mode surface and control law are designed, and the simulation analysis of the system is carried out on Matlab / Simulink simulation platform, which verifies the correctness of the method studied in this paper. The research in this paper has important theoretical and practical significance for promoting green energy technology and energy saving and emission reduction.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM614
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