Short‐Term Solar Irradiance Prediction Based on Multichannel LSTM Neural Networks Using Edge‐Based IoT System
Maozheng Pi, Ning Jin, Dongxiao Chen, Bing Lou
Abstract
Most photovoltaic power generation methods use global level irradiance (GHI) as the main input and output. However, randomness, instability, and intermittency are the main factors that seriously degrade the solar irradiance prediction results. Traditional data‐driven prediction models are difficult for accurate predictions. In this study, a multichannel deep learning model named multichannel, wavelet transform combining convolutional neural network and bidirectional long short‐term memory (MC‐WT‐CBiLSTM) framework‐based edge computing and IoT system is proposed to improve the GHI prediction accuracy. The solar irradiance data is decomposed by wavelet transform to reduce data complexity. Each decomposed component is inputted into the multichannel MC‐CBiLSTM deep learning framework for forecasting and combined to produce the final results. The comparison with existing solar irradiance forecasting methods shows that the proposed MC‐WT‐CBiLSTM deep learning framework has obvious advantages in the prediction of various time horizons.