Guo Jiqiang, Xu Xudong, Zhang Shuai, et al. ULTRA-SHORT-TERM IRRADIANCE PREDICTION BASED ON CLOUD IMAGES PHASE CORRELATION AND LOW-RANK FEATURE EXTRACTION[J]. 2025, 46(3): 494-503. DOI: 10.19912/j.0254-0096.tynxb.2023-1799.
ULTRA-SHORT-TERM IRRADIANCE PREDICTION BASED ON CLOUD IMAGES PHASE CORRELATION AND LOW-RANK FEATURE EXTRACTION
摘要
针对云的动态变化对辐照度的直接影响
基于傅里叶相位相关(PC)理论从连续地基云图获取云的动态信息矩阵(DIM)
为了减小噪声及冗余信息对模型的影响
构建低秩矩阵特征提取(LMFE)模型作为提取模块(EM)
实现DIM有效信息的提取
EM通过迭代训练得到最优特征提取矩阵W和偏置项b。同时
以双向门控循环单元(Bi-GRU)为基础搭建回归模块(RM)
RM共享EM输出W和b
从云图提取的有效信息结合历史辐照度序列作为输入
实现辐照度的多步回归预测。对真实采集的数据进行实验仿真
结果表明该预测方法可有效提高辐照度预测精度。
Abstract
Aiming at the direct impact of dynamic changes of the clouds on irradiance
this paper obtains the cloud dynamic information matrix (DIM) from continuous ground-based cloud images based on the Fourier phase correlation (PC) theory. To minimize the effects on the model led by noise and redundant information
a low-rank matrix feature extraction (LMFE) model is constructed as an extraction module (EM) to extract valid information from the DIM productively. EM obtains the optimal feature extraction matrix W and bias terms b through iteration. Simultaneously
the regression module (RM) is constructed based on the bidirectional gated recurrent unit (Bi-GRU)
where RM shares EM outputs W and b
and the valid information extracted from the cloud images is combined with the historical irradiance sequence as input to achieve multi-step regression prediction of irradiance. The experimental simulation of the actual collected data demonstrates that the prediction method can effectively improve the irradiance prediction accuracy.
关键词
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references
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