风力发电机组变浆距液压控制系统的建模与仿真
发布时间:2018-06-08 02:08
本文选题:变桨距 + DSHplus ; 参考:《东北大学》2012年硕士论文
【摘要】:变桨距功率调节技术是大型并网风电机组的重要技术之一。在风力发电机组的运行过程中,只有保证对桨叶捕捉风能的稳定控制,才能输出质量可靠、安全高效的电能。液压变桨系统是目前广泛采用的变桨距控制方式之一,研究其动态特性和控制性能,对提高变速恒频风电机组的控制质量具有重要意义。 由于风电机组的变桨距液压系统属于涉及多种能量的复杂系统,而键合图法建模在处理多种能量间的转换具有独特的优势,故本文在风电机组变桨距液压系统进行原理分析后,利用功率键合图法建立了系统的数学模型,并在MATLAB/Simulink的仿真环境下搭建了仿真模型,对系统的动态特性进行了分析。根据风电机组的实际工况特点,加入了模糊PID控制策略。结合系统的仿真模型,在仿真环境下检验了控制效果。 考虑到液压系统的复杂性,运用了液压仿真工具DSHplus搭建了系统的模型。并采用与Simulink联合仿真的方式,结合MATLAB语言编写的模糊PID控制器程序,再次对液压系统的控制效果进行检验。
[Abstract]:Variable pitch power regulation is one of the most important technologies for large scale grid-connected wind turbines. In the process of wind turbine operation, only by ensuring the stable control of wind energy capture on the blade, can the power output be reliable, safe and efficient. Hydraulic variable propeller system is one of the widely used pitch control methods at present. The dynamic characteristics and control performance of the variable pitch control system are studied. It is of great significance to improve the control quality of wind turbine with variable speed and constant frequency. Because the variable pitch hydraulic system of wind turbine belongs to a complex system involving many kinds of energy, the bond graph method has a unique advantage in dealing with the conversion between many kinds of energy. Therefore, after analyzing the principle of variable pitch hydraulic system of wind turbine, the mathematical model of the system is established by using the power bond graph method, and the simulation model is built in MATLAB / Simulink environment, and the dynamic characteristics of the system are analyzed. According to the actual operating conditions of wind turbine, fuzzy pid control strategy is added. Combined with the simulation model of the system, the control effect is tested in the simulation environment. Considering the complexity of the hydraulic system, the hydraulic simulation tool DSHplus is used to build the system model. The control effect of hydraulic system is tested again by using the method of combined simulation with Simulink and the fuzzy pid controller program written in MATLAB.
【学位授予单位】:东北大学
【学位级别】:硕士
【学位授予年份】:2012
【分类号】:TM315;TH137
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