基于水库能的水电站发电模型  

Model for Electric Energy Production of Hydropower Plants Based on Reservoir Energy

作　　者：吴杰康[1] 郭壮志[1] 祝宇楠[1] 秦砺寒[2] 宁琳[3] 

机构地区：[1]广西大学电气工程学院,南宁530004 [2]华北电力科学研究院,北京100045 [3]北京超高压有限公司,北京100045

出　　处：《电工技术学报》2009年第11期149-156,164,共9页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(50767001);国家高技术研究发展计划(863计划)(2007AA04Z100);广西高校百名中青年学科带头人计划(RC20060808002);广西壮族自治区教育厅科技计划(200808MS150);广西壮族自治区研究生教育创新计划资助项目

摘　　要：首次对水电站大型水库水体进行分级处理,采用数学微元分析思想,揭示压力引水管入水口处水体微元的能量形成机理,建立水库水体的水能综合利用模型。在此基础上,利用能量转换守恒定律,建立水电站系统的详细水机电耦合模型。探索电能形成与水体微元动能、势能、压能和水库能之间的关系;研究压力引水管倾斜角度、发电机组分布位置、水库调节能力和水库水体的最大利用小时数等因素对瞬时发电量的影响规律。通过仿真分析与比较,验证了所建详细水机电耦合模型的正确性和实用化水机电耦合模型在确定水电站装机容量及其发电规划时的相对保守性,为水电站建设和经济运行提供理论依据,对实现水能到电能的高效转换具有重要意义。This paper presents a modelling method for elctric energy production of hydroelectric plants and hydro-mechanical-electric coupling of large-scale reservoir. According to the law of conservation of energy, a hydro-mechanical-electric coupling model was constructed to formulate the electric energy converted from kinectic energy, potential energy, pressure energy and the reservoir energy. Reservoir energy is analyzed by such way, in which water body of reservoir is divided into multiple levels due to the shape of the bottom of the reservoir. By using the priciple of force analysis and energy conversion. The dynamic characteristics of instant power rate of hydropower-diven generator is studied for different factors, such as penstock angle, reservoir adjustment ability, reservoir water body, and maximal usage hours and so on. Some examples are employed to illustrate the feasiblility of the proposed method, and the simulation results shows that it could provide theory basis for the hydropower plant construction, economic operation and high effective utilization and transformation of hydro-energy.

关 键 词：水电站 水库水体分级 水库能 水机电耦合模型 

分 类 号：TV7[水利工程—水利水电工程]