海水抽水蓄能系统特性与优化研究

发布时间：2018-07-01 20:45

本文选题：海水抽水蓄能系统 + 风能发电系统　；参考：《中国科学院大学(中国科学院工程热物理研究所)》2017年硕士论文

【摘要】：电力储能技术是建设清洁低碳、安全高效能源体系的重要支撑技术之一,其中,抽水蓄能(PHES)具有技术成熟、效率高、容量大、储能周期长等优点,是目前应用最广泛的电力储能技术。海水抽水蓄能是利用海水作为工作介质的新型抽水蓄能技术,其利用海洋作为低位水库,水源充足、水位变化小,减少了系统土建工程费用,同时解决了传统抽水蓄能系统对淡水资源的依赖问题,对于临海和淡水资源缺乏的岛国和城市具有广阔的发展前景。目前国外对海水抽水蓄能系统特性及其与可再生能源发电系统相耦合的特性研究较少,国内对海水抽水蓄能系统的研究基本处于空白状态,《水电发展"十三五"规划》将"研究试点海水抽水蓄能"纳入重点任务,要求加强关键技术的研究,填补我国该项工程的空白。因此,本文开展了海水抽水蓄能系统水力特性及其与风力发电、太阳能光伏发电耦合特性与优化研究。1、构建了传统海水抽水蓄能系统和利用海底压力的新型海水抽水蓄能系统的能量转换模型,并利用MATLAB软件对系统进行了水力特性研究,揭示了在恒定负荷和变负荷两种情况下,导叶开度、水泵水轮机转速和水头等参数对系统性能的影响及其变化规律。2、构建了风/光/海水抽水蓄能混合系统的能量转换模型,利用MATLAB软件对混合系统进行了耦合特性研究,揭示了系统规模对失电率、资源浪费率和度电成本的影响及其变化规律。3、提出了风/光/海水抽水蓄能混合系统单目标(度电成本或资源过剩率)和多目标(度电成本和资源过剩率、度电成本和失电率)优化方法,建立了优化分析模型,并针对典型案例进行了单目标和多目标优化分析,获得了混合系统的单目标优化最优解及多目标优化解集(Pareto解集)。4、在以度电成本为目标函数的单目标优化的基础上,对风/光/海水抽水蓄能混合系统进行了敏感性分析,揭示了各可变因素(用电负荷、风速、太阳辐射强度、风力发电成本等)对混合系统度电成本的影响及其变化规律。
[Abstract]:Power energy storage technology is one of the important supporting technologies for building clean, low carbon, safe and efficient energy system. Among them, pumped storage (PHES) has the advantages of mature technology, high efficiency, large capacity, long energy storage period, etc. Is the most widely used power energy storage technology. Seawater pumped storage is a new type of pumped energy storage technology, which uses seawater as working medium. It uses the ocean as a low level reservoir, which has sufficient water source and little change of water level, thus reducing the cost of civil engineering of the system. At the same time, the dependence of the traditional pumped storage system on the freshwater resources is solved, which has a broad development prospect for the island countries and cities lacking of the coastal and fresh water resources. At present, there are few researches on the characteristics of seawater pumped storage system and its coupling with renewable energy generation system. The domestic research on seawater pumped storage system is basically blank. "the 13th Five-Year Plan for Hydropower Development" includes "Research pilot seawater pumped Storage" as a key task, which requires strengthening the research of key technologies. Fill in the blank of this project in our country. Therefore, the hydraulic characteristics of seawater pumped storage system and its relationship with wind power generation are carried out in this paper. The coupling characteristics and optimization of solar photovoltaic power generation are studied. 1. The energy conversion model of traditional seawater pumped storage system and a new seawater pumped storage system using seabed pressure is constructed, and the hydraulic characteristics of the system are studied by using MATLAB software. Under the condition of constant load and variable load, the influence of parameters such as guide vane opening, speed of pump turbine and head on system performance and its variation rule are revealed. The energy conversion model of wind / light / seawater pumped-storage system is constructed. The coupling characteristics of the hybrid system are studied by using MATLAB software, and it is revealed that the scale of the system has a positive effect on the power loss rate. The influence of resource wastage rate and power cost and its variation rule. 3. The single target (power cost or resource surplus rate) and multi-objective (power cost and resource surplus rate) of hybrid wind / light / seawater pumped storage system are proposed. Based on the optimization method of power cost and power loss rate, the optimization analysis model is established, and the single-objective and multi-objective optimization analysis is carried out for typical cases. The single objective optimal solution and Pareto solution set (Pareto solution set) of hybrid system are obtained. On the basis of single objective optimization based on the cost of degree of electricity, the sensitivity of hybrid wind / optical / seawater pumped storage system is analyzed. The influence of variable factors (power load, wind speed, solar radiation intensity, wind power cost, etc.) on the cost of the hybrid system is revealed.
【学位授予单位】：中国科学院大学(中国科学院工程热物理研究所)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TV743;TV734

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