超级电容器与大容量储能装置的组合运行策略研究

发布时间：2018-02-04 18:09

本文关键词： 风电功率组合储能系统控制策略频率联络线功率综合效益　出处：《华北电力大学》2014年硕士论文　论文类型：学位论文

【摘要】：在环境和能源双重压力下发展起来的可再生能源展示出强势的发展前景,世界各国都对可再生能源的开发利用予以高度重视,尤其是对风能、太阳能等便利清洁能源的大力支持。风能作为目前最具有大规模商业化、行业化开发潜能的清洁可再生能源,大规模开发利用的最直接途径就是风力发电并上网售电,但是由于风速的无规则变化使得风机输出功率特性表现出波动性和间歇性,这会对电网稳定运行造成不利影响,使得风电并网能力受到限制。因此在保证电网安全稳定运行的前提下,解决风电出力波动,提高风电并网率成为现阶段需要解决的关键问题。本文的研究目的是通过组合不同类型储能技术的优点实现快速、大容量、经济储能,从而平抑风电输出功率波动,减小风电并网对电力系统的不利影响,实现储能系统的经济高效利用。首先,本文研究了现阶段世界风电发展现状和风电波动特性对电网的不利影响,提出储能的必要性。在风电波动功率分解的基础上提出对储能设备的不同需求,提出不同储能技术组合运行的可行性。其次,本文从功率型和容量型分类,介绍了超级电容储能和抽水蓄能储能技术各自的特点,并对单一储能技术进行了仿真分析,提出一种基于容量阈值区间配合的组合储能运行策略。然后,利用MATLAB/Simulink仿真软件对组合运行策略进行模拟仿真,在微网孤岛运行模式下分析储能系统组合运行控制策略对频率的影响；并网运行模式下分析储能系统对联络线功率调节的作用。最后,本文提出一种评价超级电容—抽水蓄能储能系统成本和经济效益的模型,给出储能系统综合效益的各评价因子数学模型,为风-储系统的成本与综合效益分析提出了一种评价方法。
[Abstract]:Renewable energy developed under the dual pressure of environment and energy shows a strong development prospects. Countries all over the world attach great importance to the development and utilization of renewable energy, especially wind energy. Solar energy and other convenient clean energy support. Wind energy as the most large-scale commercialization, industry development potential of clean and renewable energy. The most direct way of large-scale development and utilization is wind power generation and online electricity sales, but because of the irregular variation of wind speed, the output power characteristics of the fan show volatility and intermittence. This will have a negative impact on the stable operation of the grid, which limits the ability of wind power grid connection. Therefore, under the premise of ensuring the safe and stable operation of the power grid, wind power generation fluctuations can be solved. Improving wind power grid connection rate has become a key problem to be solved at the present stage. The purpose of this paper is to achieve fast, large capacity and economical energy storage by combining the advantages of different types of energy storage technology, thus to stabilize the fluctuation of wind power output power and reduce the adverse impact of wind power grid connection on the power system. The economic and efficient utilization of energy storage system is realized. First of all, this paper studies the current situation of wind power development in the world and the adverse effects of wind power fluctuation characteristics on the power grid. The necessity of energy storage is put forward. Based on the decomposition of fluctuating power of wind power, different requirements for energy storage equipment are put forward, and the feasibility of combined operation of different energy storage technologies is put forward. Secondly, according to the classification of power type and capacity type, this paper introduces the characteristics of super capacitor energy storage technology and pumped storage energy storage technology, and simulates the single energy storage technology. A combined energy storage operation strategy based on capacity threshold interval matching is proposed. Then, MATLAB/Simulink simulation software is used to simulate the combined operation strategy, and the influence of the combined operation control strategy on the frequency of the energy storage system is analyzed under the microgrid islanding operation mode. The effect of energy storage system on tie-line power regulation is analyzed in grid-connected operation mode. Finally, this paper presents a model to evaluate the cost and economic benefits of the super-capacitance-pumped storage system, and gives the mathematical models of the comprehensive benefit of the energy storage system. This paper presents an evaluation method for cost and comprehensive benefit analysis of wind-storage 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】：2014
【分类号】：TM53

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