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    A Comparative Study of Optimal Energy Management Strategies for Energy Storage with Stochastic Loads

    Alasali, Feras, Haben, Stephen, Foudeh, Husam and Holderbaum, William ORCID logoORCID: https://orcid.org/0000-0002-1677-9624 (2020) A Comparative Study of Optimal Energy Management Strategies for Energy Storage with Stochastic Loads. Energies, 13 (10). p. 2596.

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    This paper aims to present the significance of predicting stochastic loads to improve the performance of a low voltage (LV) network with an energy storage system (ESS) by employing several optimal energy controllers. Considering the highly stochastic behaviour that rubber tyre gantry (RTG) cranes demand, this study develops and compares optimal energy controllers based on a model predictive controller (MPC) with a rolling point forecast model and a stochastic model predictive controller (SMPC) based on a stochastic prediction demand model as potentially suitable approaches to minimise the impact of the demand uncertainty. The proposed MPC and SMPC control models are compared to an optimal energy controller with perfect and fixed load forecast profiles and a standard set-point controller. The results show that the optimal controllers, which utilise a load forecast, improve peak reduction and cost savings of the storage device compared to the traditional control algorithm. Further improvements are presented for the receding horizon controllers, MPC and SMPC, which better handle the volatility of the crane demand. Furthermore, a computational cost analysis for optimal controllers is presented to evaluate the complexity for a practical implementation of the predictive optimal control systems.

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