Short-Term Photovoltaic Power Forecasting Using a Bi-LSTM Neural Network Optimized by Hybrid Algorithms

Photovoltaic (PV) power generation is characterized by high fluctuation and intermittency. The accurate forecasting of PV power is crucial for optimizing grid operation and scheduling. Thus, a novel short-term PV power-forecasting method based on genetic algorithm-adaptive multi-objective differential evolution (GA-AMODE)-optimized bidirectional long short-term memory (BiLSTM) is proposed. Firstly, a data preprocessing method, including principal component analysis, a sliding window mechanism, and Gaussian noise injection, is designed to achieve dimension reduction and data robustness. Then, a GA-AMODE-BiLSTM model for PV power forecasting is proposed. GA and AMODE algorithms are integrated to balance global and local searching processes during the optimization of the BiLSTM network’s hyperparameters. Bi-LSTM is more suitable for complex time series tasks involving long-term dependencies and asymmetric relationships. The forecasting method is evaluated by typical indexes and is statistically tested. Comparative experiments using the same dataset across various models have been performed. The results show that the proposed GA-AMODE-BiLSTM model significantly outperforms other models in forecasting accuracy. Additionally, its superior stability and generalization is demonstrated, making the proposed method an effective tool for optimizing the management of renewable energy generation and enhancing the sustainability of energy systems.