抽水蓄能电站能量模型
首发时间:2020-06-15
摘要:为满足电网消纳不确定性可再生能源的设计与运行需求,本文建立抽水蓄能电站的能量模型,包括能量水头、蓄能量以及功能转换关系。能量水头不同于常规的水头,直接刻画上库蓄水势能;补给蓄水变化对能量水头影响明显,能量水头增量守恒关系刻画补给蓄水变化对能量水头的影响;蓄能量由上库蓄水和能量水头共同决定;能量库容由发电库容和额定能量水头共同决定;灵敏度分析表明,上库蓄水变化是蓄能量变化的主因;提出了蓄函数的概念和构建方法,用以快捷计算蓄能情况;最后,以华北某规划中的抽水蓄能电站为例具体分析,验证抽水蓄能电站的能量模型理论。
关键词: 电力系统及其自动化 抽水蓄能电站 能量模型 能量水头 能量库容 功能关系
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Energy Model of Pumped Hydro Storage Station
Abstract:In order to meet the design and operation requirements of uncertain renewable energy accommodation in power grid, this paper establishes the energy model of pumped hydro storage station, including energy water head, energy storage and the relationship of conversion between power and energy. The energy water head which directly describes the potential energy of water storage of upper reservoir is different from the conventional water head; the cEnergy Model of Pumped Hydro Storage Stationhange of supply water storage has obvious influence on the energy water head, and the conservation of the energy water head increment describes the influence of the change of supply water storage on energy water head; energy storage is determined by the water storage of upper reservoir and the energy water head; energy storage capacity is determined by the power storage capacity and the rated energy water head; the sensitivity analysis shows that the change of the water storage of upper reservoir is the main cause of the energy storage change. The concept and construction method of the storage function are put forward to calculate the energy storage situation quickly. Finally, taking a planning pumped hydro storage station in North China as an example to analyze, the energy model theory of the pumped hydro storage station is verified.
Keywords: electric power system and automation pumped hydro storage station energy model energy water head energy storage capacity relationship between power and energy
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