Suzhou Electric Appliance Research Institute
期刊號: CN32-1800/TM| ISSN1007-3175

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基于交叉熵理論的光伏發(fā)電功率組合預(yù)測方法

來源:電工電氣發(fā)布時間:2022-04-20 14:20 瀏覽次數(shù):491

基于交叉熵理論的光伏發(fā)電功率組合預(yù)測方法

陳麗霞
(國網(wǎng)福建省電力有限公司福州供電公司,福建 福州 350007)
 
    摘 要:光電功率預(yù)測對電網(wǎng)的安全穩(wěn)定運(yùn)行以及調(diào)度等方面具有重要意義。針對單一預(yù)測方法精度較低的問題,提出了一種基于交叉熵理論的光伏發(fā)電功率組合預(yù)測方法,以單一預(yù)測方法和最小化組合預(yù)測方法的“差值”為依據(jù),動態(tài)地改變不同預(yù)測方法的權(quán)重,提高組合預(yù)測的精度。以某光伏電場為算例進(jìn)行分析,結(jié)果表明,該模型針對不同的天氣,具有較強(qiáng)的預(yù)測適應(yīng)性,可以提高預(yù)測精度,減少預(yù)測誤差的出現(xiàn)。
    關(guān)鍵詞:光伏發(fā)電;功率預(yù)測;交叉熵;權(quán)重;組合預(yù)測
    中圖分類號:TM615     文獻(xiàn)標(biāo)識碼:A     文章編號:1007-3175(2022)04-0017-04
 
A Combination Forecasting Method of Photovoltaic Power Generation
Based on Cross-Entropy Theory
 
CHEN Li-xia
(Fuzhou Power Supply Company, State Grid Fujian Electric Power Co., Ltd, Fuzhou 350007, China)
 
    Abstract: Photoelectric power prediction has significant meaning to the safe and stable operation and dispatching of power grids. This paper proposed a combined prediction method of photovoltaic power generation based on cross-entropy theory to solve the problem of the low accuracy of the single prediction method. This combined prediction method is based on the“gap”between the single forecast method and the minimized combined forecast method. It changed the weight of different forecasting methods dynamically and improved the accuracy of combined forecasting. This paper took a photovoltaic field as an example to analyze. The result shows that the model has strong prediction adaptability, and it could improve prediction accuracy and reduce prediction errors.
    Key words: photovoltaic power generation; power prediction; cross-entropy; weight; combined prediction
 
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