Predictive optimization of hybrid energy systems with temperature dependency

Hybrid Energy Systems (HES), amalgamating renewable sources, energy storage, and conventional generation, have emerged as a responsive resource for providing valuable grid services. Subsequently, modeling and analysis of HES have become critical, and the quality of grid services hedges on it. Curren...

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Bibliographic Details
Published in:Electric power systems research 2024-10, Vol.235 (C), p.110767, Article 110767
Main Authors: Mishra, Tanmay, Pandey, Amritanshu, Almassalkhi, Mads R.
Format: Article
Language:English
Subjects:
Energy storage
Homotopy
Hybrid energy systems
Predictive optimization
Projection
Solar PV
Temperature-dependent modeling
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Summary:Hybrid Energy Systems (HES), amalgamating renewable sources, energy storage, and conventional generation, have emerged as a responsive resource for providing valuable grid services. Subsequently, modeling and analysis of HES have become critical, and the quality of grid services hedges on it. Currently, most HES models are temperature-agnostic. However, temperature-dependent factors can significantly impact HES performance, necessitating advanced modeling and optimization techniques. With the inclusion of temperature-dependent models, the challenges and complexity of solving optimization problems increase. In this paper, the electro-thermal modeling of HES is discussed. Based on this model, a nonlinear predictive optimization framework is formulated. A simplified model is developed to address the challenges associated with solving nonlinear problems (NLP). Further, projection and homotopy approaches are proposed. In the homotopy method, the NLP is solved by incrementally changing the C-rating of the battery. Simulation-based analysis of the algorithms highlights the effects of different battery ratings, ambient temperatures, and energy price variations. Finally, comparative assessments with a temperature-agnostic approach illustrate the effectiveness of electro-thermal methods in optimizing HES. •An electro-thermal model of hybrid energy systems with battery storage, PV and inverter.•Non-linear, Non-convex problem formulation and discussion about challenges associated with them.•Proposed relaxation and simplification with projection and homotopy approach.•Comparison with the temperature-agnostic model to show the benefits of the temperature-dependent HES model.
ISSN:0378-7796
1873-2046
DOI:10.1016/j.epsr.2024.110767