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一种新型天气分型方法及其在光伏功率预测中的应用

Journal of Shanghai Jiaotong University(2021)

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Abstract
为提高光伏功率预测准确率提出了一种新的天气分型方法,该方法首先按总云量大小区分晴天和云天,然后根据太阳被遮蔽的程度将云天进一步细分为三类.该方法能有效识别影响光伏出力的关键气象环境因子特征,并对其加权求和得到新型分类指标Sky Condition Factor(SCF).该方法物理意义明确,区分度较好且易于量化.对天气类型合理细分后,可消除众多气象环境因子之间的耦合关系,降低输入变量维度,易于统计建模.最后分别基于原理和统计方法进行建模验证,结果显示该方法可以有效提高光伏功率预测的准确率.
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Key words
photovoltaic (pv) power prediction,weather type classification,meteorological environmental factors,physical approach,statistic approach
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