Modular hybrid battery storage system for peak-shaving and self-consumption optimization in industrial applications.

Abstract The paper presents results developing an innovative power supply system on the basis of a modular, flexibly customizable and cost-effective lithium-ion battery and power converter unit for peak-shaving and load levelling applications in the industrial sector including advanced self-consumption optimization strategies for renewable energies. First, the paper describes a monitoring campaign with high resolution measurements on machine, plant and factory level. Second, technical and economic simulation models for the components (battery, power conversion system and energy management) and the integrated system (including total investment costs, conversion losses, state of charge estimation) are presented. The innovative features of the system are described, including a multi-criteria optimizing energy management based on an adaptive dynamic programming algorithm, battery condition monitoring and a hybrid battery storage approach. Third, results of the optimizing design process are presented. The optimal type and power rating of converters and switches and the optimal system topology are determined and discussed for an application example. Simulation results for three DC-DC and five DC-AC converter topologies and two different energy management concepts are discussed and compared. [ABSTRACT FROM AUTHOR]