【作者】 闫永勤；

【导师】 林飞； 郑琼林；

【作者基本信息】 北京交通大学 ， 电力电子与电力传动， 2007， 硕士

【摘要】 随着石油、天然气、煤炭等传统化石燃料的枯竭和及其燃烧对环境造成的严重污染，作为可再生绿色能源的风能的开发利用具有十分重要的意义。目前各种风力发电技术的发展方兴未艾，而其中变速恒频风力发电技术因其高效性和实用性正受到越来越多的重视，成为各国学者竞相研究的热点。为解决实验室环境中模拟风电现场进行风力发电研究的原动机问题，本文提出了采用鼠笼式异步电机来模拟风轮机的方案，并采用查表的方法来模拟风轮机的转差与转速和风速的变化特性，由此计算任意风轮机的转速和风速对应的转差，并以此为指令，来控制异步电机，使其输出相应的转差和转速来模拟实际风轮机的运行。本文还构建了由三台变流器、三块DSP2407A控制板、两台鼠笼式异步电机组成的风力发电系统试验平台。对模拟风轮机的电动机和鼠笼式异步风力发电机进行转差频率控制，并采用C语言和汇编语言结合的方法进行了软件编程。最后对所建立的风力发电系统试验平台进行了风轮机运行特性的模拟实验和风力发电机的并网运行实验等，实验结果证明了采用该系统进行风力发电系统试验研究的正确性和有效性。更多还原

【Abstract】 With the shortage of the fossil fuel such as coal, oil and the environment pollution caused by the combustion of fossil fuel, It is of great significance to develop and utilize wind power, which is not only renewable but also without pollution. Now many kinds of technologies applied to wind-power generation are in the ascendant, among which the technology of variable speed and constant frequency (VSCF) is getting increasing recognition for its characteristic of high-efficiency and practicability. And the technology also becomes research hotspot of many countrys’ scholar.In this paper, it brought forward the method of emulating wind turbine by squirrel-cage induction motor to solve the prime motor issue for the study of wind power generating system in lab. And the torque-rotating speed characteristic of wind turbine is simulated by using polynomial fit. So the wind torque can be calculated under any rotating speed of wind turbine and wind speed, which is regarded as torque reference to control the inductance motor. Under the torque control, the inductance motor outputs determinate torque and rotating speed to simulate the real wind turbine.The reliable and integrated laboratory experimental platform of wind power generation system was constructed in this paper. And the platform including three converters and three DSP controllers and two squirrel-cage induction motors. The induction motor that simulated the wind turbine characteristic and the wind generator are controlled by the slip-frequency method. And the module software is written by 16 bits fixed-point C code that interfaces with assembly language functions so that it can be amended and replanted easily.Finally, a series of experimental study are done on the VSCF wind power generation system platform. The study includes the operation experiment of simulated wind turbine and wind power generation system connecting to grid conditions experiment. The result of the experiments all validated the validity and feasibility of the model of VSCF wind power generation system platform in the lab .更多还原