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UNCERTAINTIES IN PHOTOVOLTAIC ELECTRICITY YIELD PREDICTION FROM FLUCTUATION OF SOLAR RADIATION

机译:太阳辐射波动预测光伏发电量的不确定性

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We have analyzed the variability of solar radiation in the Mediterranean and Black Sea regions bycomparing yearly and monthly averages to long-term average values calculated from the HelioClim-1 database.Daily sums of global horizontal irradiation are considered for 18 years in the period 1985-2004. Standard deviationof yearly sums of global horizontal irradiation shows low interannual variability, being mostly in the range of 4% to6%. While in arid climate of Northern Africa, Middle East, and Southern Europe standard deviation goes below 4%,values up to 10% are identified along coasts and in mountains. In the least sunny year out of 18, the solar resourcewas generally never more than 9% below the long-term average, and only in a few regions the radiation deficitreached 15%. The most stable weather is found in summer with standard deviation in June below 12%. The leaststable season is winter, with variability higher then 20% in December, and regionally going above 35%. The solarresource has distinctive time and geographical patterns that might affect financing of large photovoltaic systems, aswell as management of the distributed electricity generation.
机译:我们通过以下方法分析了地中海和黑海地区太阳辐射的变化性: 将年平均值和月平均值与从HelioClim-1数据库计算出的长期平均值进行比较。 在1985-2004年期间,考虑了18年的每日全球水平辐照总和。标准偏差 全球水平辐照的年度总和显示出较低的年际变化,大部分在4%至 6%。在北非,中东和南欧的干旱气候中,标准偏差低于4%, 沿海和山区的最高值确定为10%。在18年中最不晴朗的一年中,太阳能 通常不低于长期平均值的9%以上,并且仅在少数地区存在辐射不足 达到15%。夏季天气最稳定,6月份的标准偏差低于12%。至少 冬季是稳定的季节,12月的波动性高于20%,而区域性变化高于35%。太阳能 资源具有独特的时间和地理模式,可能会影响大型光伏系统的融资,因为 以及分布式发电的管理。

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