高海拔地区水风光出力特性研究
Research on the Output Characteristics of Water, Wind and Solar Energy in High Altitude Areas
为揭示高海拔地区水电、风电、光伏(以下简称“水风光”)的出力规律,本文首先分析高海拔环境对水风光出力的影响机理,进而构建纳入高海拔修正的出力计算模型;以青海玉树高海拔地区为算例,基于当地气象与水文数据,通过MATLAB实现水风光出力模拟,并绘制出力特性曲线;最后分析高海拔水风光出力的特殊性:风电因空气密度降低导致出力下降,光伏因高辐照度与低温协同作用使出力效率提升,水电受季节性积雪融水影响呈现夏丰冬枯特征。研究结果可为高海拔地区水风光互补电站规划与调度提供理论支撑。
To reveal the power generation patterns of hydropower, wind power, and photovoltaic (hereinafter referred to as "hydro-wind-solar") in high-altitude regions, this study first analyzes the mechanisms by which high-altitude environments affect hydro-wind-solar output, then establishes a power generation calculation model incorporating high-altitude corrections. Taking the high-altitude area of Yushu, Qinghai Province, as a case study, the research simulates hydro-wind-solar output using local meteorological and hydrological data through MATLAB, and plots the corresponding power characteristic curves. Finally, it examines the unique characteristics of hydro-wind-solar output at high altitudes: wind power decreases due to reduced air density, photovoltaic efficiency increases due to the combined effects of high solar irradiance and low temperatures, and hydropower exhibits seasonal variations with abundant output in summer and low output in winter, influenced by snowmelt. The findings provide theoretical support for the planning and operation of hybrid hydro-wind-solar power stations in high-altitude regions.
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