涡簧储能装置的设计及仿真研究

发布时间：2018-01-21 09:25

本文关键词： 储能涡卷弹簧有限元应力分析模态分析动力学仿真　出处：《华北电力大学》2012年硕士论文　论文类型：学位论文

【摘要】：随着社会的发展,能源的消耗,发展新能源迫在眉睫。风能是目前新能源中发展最快的清洁能源,也是最具有开发价值的可再生能源之一。风能是典型的随机性和间歇性能源,风电并网会给电网带来巨大冲击,影响电网的稳定运行,使输出电压的质量降低,因而成为制约风电发展的瓶颈。在风力发电中引入储能系统,利用其动态吸收能量并适时释放的特点,改善风电场输出功率的可控性,提升电网的稳定性,已成为解决该问题的有效手段。本文利用平面涡卷弹簧在受载卷紧时将机械能转变为变形能,卸载时又将变形能转化为机械能的特点,提出了一种基于平面涡卷弹簧的机械式弹性储能-发电系统方案,并以其关键部件—平面涡卷弹簧为研究对象,进行了如下研究：首先,对机械式弹性储能-发电系统方案进行评价和可行性分析,在方案设计的基础上,建立平面涡簧的力学模型,研究其特性曲线及储能密度计算方法,得到平面涡簧的基本设计数据及储能密度的大小其次,考虑到平面涡卷弹簧的形状特点,将其等效成曲梁并建立了有限元模型,通过对其进行有限元应力分析和模态分析,得到了平面涡卷弹簧在受载发生扭转变形时横截面上的应力分布、固有频率和前20阶振型；最后,通过建立平面涡卷弹簧的实体模型,以ADAMS软件为平台,运用柔性体理论,对平面涡卷弹簧进行了动力学特性分析及仿真研究,得到了在施加恒定角速度条件下,该平面涡卷弹簧的刚度曲线和储能曲线。本文研究成果为储能装置的优化设计及机械式弹性储能-发电系统的实现奠定了基础。
[Abstract]:With the development of society and the consumption of energy, it is urgent to develop new energy. Wind energy is the fastest developing clean energy. Wind energy is one of the most valuable renewable energy sources. Wind energy is a typical random and intermittent energy, wind power grid will bring a huge impact on the grid, affect the stable operation of the grid, so that the quality of the output voltage is reduced. Therefore, it becomes the bottleneck to restrict the development of wind power. The energy storage system is introduced into wind power generation, and the dynamic energy absorption and timely release are used to improve the controllability of wind farm output power and enhance the stability of power grid. It has become an effective method to solve this problem. In this paper, the mechanical energy is changed into deformation energy when the load is tight, and the deformation energy is converted into mechanical energy when unloading. A mechanical elastic energy storage and power generation system based on planar coil spring is proposed. Firstly, the scheme of mechanical elastic energy storage-generation system is evaluated and the feasibility is analyzed. On the basis of the scheme design, the mechanical model of planar coil spring is established, and its characteristic curve and energy storage density calculation method are studied. The basic design data of planar coil spring and the magnitude of energy storage density are obtained. Secondly, considering the shape characteristics of the planar scroll spring, it is equivalent to the curved beam and the finite element model is established. The finite element stress analysis and modal analysis of the spring are carried out. The stress distribution, natural frequency and the first 20 vibration modes of the plane vortex coil spring on the cross section of torsional deformation under load are obtained. Finally, by establishing the solid model of the planar coil spring, using the flexible body theory and ADAMS software as the platform, the dynamic characteristics of the planar coil spring are analyzed and simulated. The stiffness curve and energy storage curve of the planar coil spring are obtained under the condition of constant angular velocity. The research results of this paper lay a foundation for the optimization design of energy storage device and the realization of mechanical elastic energy storage-generation system.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH135

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