典型天气下太阳直接辐照的环日比参量时变特性研究  

Study on the dynamic characteristics of CSR parameters in direct solar irradiation in typical weather

作　　者：苏营 牛一森 王乾 邹良林 邹祖冰 颜子璇 宋记锋[3] Su Ying;Niu Yisen;Wang Qian;Zou Lianglin;Zou Zubing;Yan Zixuan;Song Jifeng(China Three Gorges Corporation,Institute of Science and Technology,Beijing 100038,China;School of Renewable Energy,North China Electric Power University,Beijing 102206,China;State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources,North China Electric Power University,Beijing 102206,China)

机构地区：[1]中国长江三峡集团有限公司科学技术研究院,北京100038 [2]华北电力大学新能源学院,北京102206 [3]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《可再生能源》2023年第2期186-192,共7页Renewable Energy Resources

基　　金：国家自然科学基金(51821004,52090064);新能源电力系统国家重点实验室项目(LAPS2020-0,LAPS2020-11);并网友好型风光储场站群智慧联合调控运维关键技术研究(WWKY-2021-0173)。

摘　　要：太阳直射的环日比参量(CSR)反映了直接辐射中的能量分布。CSR为时变量,受气溶胶浓度、成份和阳光穿越大气厚度影响。然而,在太阳热发电的聚光能流计算中,通常将其等效为常数而忽略其时变性,造成误差。文章搭建了CSR测量平台,利用双视野辐照表法对北京地区典型天气的CSR时变特性进行了连续测量。结果显示,晴朗天气下,CSR一天内呈现明显的“浴盆”曲线,太阳高度角较小时,CSR可达0.2~0.4;正午时,太阳高度角最大,CSR可降至0.05~0.2,日内变化数倍,多云天气下短时间内环日比呈现出强烈波动。这说明在太阳热发电站的聚焦能流研究中应当将CSR作为时变量对待。文章进一步揭示出CSR具有季节规律,且与大气质量和太阳直接辐照之间存在一定相关性。The circumsolar ratio,a parameter of direct beam radiation,depicts the energy distribution of direct beam radiation.CSR is not a fixed value because CSR is influenced by concentration and composition of aerosol,and it is also influenced by the distance sunlight pass through the atmosphere.However,in the concentrated solar thermal power flux simulation,CSR is generally considered to be a definite value and its volatility is ignored,resulting in errors.In this study,a CSR measurement platform was fabricated,and the CSR time-change characteristics in typical weathers in Beijing were continuously measured the CSR time-varying characteristics of typical weather in Beijing by using dual-field two pyrheliometers with different field of view.The result shows that CSR present an obvious"bathtub"curve during a day in clear weather.When the altitude angle of the sun is low,CSR can be as high as 0.2~0.4.At noon,when the solar altitude angle is at its highest,and the CSR can be reduced to 0.05~0.2.CSR changes several times within a day.In cloudy weather,the CSR shows strong fluctuation in a short time.The results indicates that CSR should be treated as a variable in the study of focusing energy flow of concentrated solar thermal power system.A further analysis reveals that CSR varys in different seasons,and there is a correlation between CSR,Air mass(AM)and Direct Normal irradiance(DNI)

关 键 词：环日比 太阳能热发电 波动性 太阳直接辐照 

分 类 号：TK519[动力工程及工程热物理—热能工程]