基于异步电动机变频调速的风力发电提水系统研究

发布时间：2018-01-15 09:08

本文关键词：基于异步电动机变频调速的风力发电提水系统研究　出处：《内蒙古大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着人类社会不断进步和经济的快速发展,加快了化石能源消耗的速度,对化石能源的无限制使用不但会将其消耗殆尽而且在燃烧过程中会产生温室气体和雾霾。由于风能在使用过程中不会造成环境污染而且取之不尽用之不竭,在全球倡导可持续发展的背景下,正受到世界各国广泛的关注并逐渐成为绿色能源的主角。我国西部地区风能资源丰富,因地制宜地大规模开发和应用风力发电提水技术不但能够有效地利用风能资源,而且可以解决偏远地区人畜饮水及农田灌溉用水的难题。首先,本文介绍了风力发电提水系统的研究背景和意义,概括了国内外研究现状。针对偏远地区人畜饮水和农田灌溉用水困难的实际情况,研究风力发电提水系统的组成结构,并对组成该系统的各个部分进行了工作原理以及特性的分析。其次,在风力发电提水系统中,由于电动机在全压启动时电流过大,导致定子绕组发热加速绝缘老化,而且对逆变器造成冲击。另外,由于风速的不稳定性,导致电动机不能稳定运行,有时会产生堵转现象,堵转时间过长会烧毁电动机。因此本文提出了异步电动机变频矢量控制方法和软启动控制方法,不仅可以使得电动机转速实现平滑调速,而且可以减小启动电流,起到保护逆变器及电动机的作用。再次,通过对偏远地区居民家中的水井深度和家庭口用水量的调查,对风力机、水泵和电动机进行了选型,并确定了蓄水池的容积。设计了一套离网型风力发电提水系统,并对该系统的控制电路参数进行了设计。最后,在MATLAB环境下,利用Simulink对所设计的风力发电提水系统进行了效果验证。结果表明,在不同风速的条件下,采用软启动和变频矢量控制方法,风力发电提水系统仍然能够稳定、高效的运行。
[Abstract]:With the continuous progress of human society and the rapid development of economy, the speed of fossil energy consumption has been accelerated. The unlimited use of fossil energy will not only exhaust it, but also produce greenhouse gases and haze in the process of combustion. Since wind energy will not cause environmental pollution in the process of use and inexhaustible. In the context of global advocacy for sustainable development, it has been widely concerned by the world and gradually become the protagonist of green energy. The western region of China is rich in wind energy resources. According to local conditions, the large-scale development and application of wind power water lifting technology not only can effectively use wind energy resources, but also can solve the problems of drinking water and irrigation water for people and livestock in remote areas. First of all. This paper introduces the research background and significance of wind-power pumping system, summarizes the research status at home and abroad, aiming at the difficult situation of drinking water for human and livestock and irrigation water for farmland in remote areas. The structure of the wind-powered water lifting system is studied, and the working principle and characteristics of each part of the system are analyzed. Secondly, in the wind-powered water lifting system. Due to the excessive current of the motor at full voltage start-up, the stator winding heating accelerates the insulation aging, and causes the shock to the inverter. In addition, because of the instability of the wind speed, the motor can not operate stably. Sometimes the phenomenon of clogging will occur and the motor will be destroyed if the time of blocking is too long. So this paper proposes the variable frequency vector control method and the soft start control method of asynchronous motor which can not only make the speed of motor smooth speed adjustment. Moreover, it can reduce the starting current and protect the inverter and motor. Thirdly, through the investigation of the depth of the well and the water consumption of the home in the remote area, the wind turbine is investigated. The pump and motor are selected, and the volume of the reservoir is determined. An off-grid wind power lift system is designed, and the control circuit parameters of the system are designed. Finally. In the MATLAB environment, the effect of the designed wind-power pumping system is verified by using Simulink. The results show that under the different wind speed conditions. With soft start and variable frequency vector control, the wind power pumping system can still operate stably and efficiently.
【学位授予单位】：内蒙古大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM614;TU991

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