Component modeling and updating method of integrated energy systems based on knowledge distillation

• Published in: Energy and AI Vol. 16; p. 100350
• Main Authors: Lin, Xueru, Zhong, Wei, Lin, Xiaojie, Zhou, Yi, Jiang, Long, Du-Ikonen, Liuliu, Huang, Long
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-05-2024; Elsevier
• Subjects: Adaptive update; Component modeling; Data-driven; Integrated energy system; Knowledge distillation; Variable operating conditions; Integrated energy system; Adaptive update; Data-driven; Knowledge distillation; Variable operating conditions; Component modeling
• ISSN: 2666-5468; 2666-5468
• DOI: 10.1016/j.egyai.2024.100350

•A component modeling and updating method for IES is proposed.•Knowledge distillation is utilized for real-time updates of complex models.•A model update trigger method based on PCA is established.•The effects of model updates on IES scheduling are analyzed.•Adaptability of data models to variable conditions is enhanced.
Amid the backdrop of carbon neutrality, traditional energy production is transitioning towards integrated energy systems (IES), where model-based scheduling is key in scenarios with multiple uncertainties on both supply and demand sides. The development of artificial intelligence algorithms, has resolved issues related to model accuracy. However, under conditions of high proportion renewable energy integration, component load adjustments require increased flexibility, so the mathematical model of the component must adapt to constantly changing operating conditions. Therefore, the identification of operating condition changes and rapid model updating are pressing issues. This study proposes a modeling and updating method for IES components based on knowledge distillation. The core of this modeling method is the light weighting of the model, which is achieved through a knowledge distillation method, using a teacher-student mode to compress complex neural network models. The triggering of model updates is achieved through principal component analysis. The study also analyzes the impact of model errors caused by delayed model updates on the overall scheduling of IES. Case studies are conducted on critical components in IES, including coal-fired boilers and turbines. The results show that the time consumption for model updating is reduced by 76.67 % using the proposed method. Under changing conditions, compared with two traditional models, the average deviation of this method is reduced by 12.61 % and 3.49 %, respectively, thereby improving the model's adaptability. The necessity of updating the component model is further analyzed, as a 1.00 % mean squared error in the component model may lead to a power deviation of 0.075 MW. This method provides real-time, adaptable support for IES data modeling and updates.
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