A representation of a HESS aggregated at a multi-household energy community (Level 4)
PARMENIDES proposes a generic definition and information model for hybrid energy storage systems
In line with PARMENIDES’s objective of developing an open ontology focusing on the electricity and heating domains for buildings, customers, and energy communities, clear definitions of assets and concepts are necessary. This has led a team of researchers under the EU-funded PARMENIDES project to propose a generic definition and information model for hybrid energy storage systems (HESS), which will be presented at the Open Source Modelling and Simulation of Energy Systems (OSMSES) 2024 workshop in Vienna, Austria on September 3 to 6.
Comparing various definitions and extending known concepts such as the “energy hub”, the researchers proposed the following definition of a HESS: “HESS is a combination of two or more energy storage mediums with one or more energy carriers as input(s) and/or outputs, coupled through energy coupling devices, transported through shared lines, buses, loops, nodes, and/or networks of those carriers, designed with a specific topology, and ideally controlled by an appropriate energy management system to inject and release desired energy quantities, rates, and/or quality of respective energy carriers at specific time intervals according to specific system objectives. It can be characterized as a collective unit in terms of power and energy injection requirements and limitations, capacity and capacity constraints, system efficiency, and power and energy outputs, but can be further disaggregated into its respective carriers and components, including but not limited to the charge and discharge rates, storage losses and degradation factors, and efficiencies of coupling devices and transport systems. Energy demand by coupling devices is considered part of, and not isolated from, the system input energy requirements.”
The paper elaborated on the definition above, especially its corresponding classes and expected attributes. The authors described possible aggregation levels from a single technology to an organizational/enterprise/network level. They also characterized the HESS in a bottom-up manner to clarify and emphasize the underlying physical manifestations of the components. It is expected that the paper will only serve as a starting point for modelling HESS for energy management systems (EMS), algorithms, and ontologies, and allows for context- and project-specific variations.
The researchers hope that the paper can provide a basic framework that is modular, technology-agnostic, configurable, extensible, and scalable, which can therefore facilitate the achievement of PARMENIDES’s goal of interoperability. HESS is at the core of the energy assets described in the PARMENIDES Energy Community Ontology (PECO), which will be embedded in the new generation EMS currently developed under the same project and tested in pilots in Austria and Sweden.
The paper’s authors are Lorenz Ray Payonga (PhD student, KTH), Hatef Madani (associate professor, KTH), Saman Nimali Gunasekara (assistant professor, KTH), Miloš Šipetić (research engineer, AIT), Fabrizia Giordano (junior research engineer, AIT), and Mark Stefan (senior research engineer, AIT).
According the OSMSES workshop website, the conference will address all aspects related to the use and development of open source tools for power and energy systems modelling and simulation, and aims to foster discussion on these topics among experts from academia, industry and utilities. It is co-hosted with the Symposium Communications for Energy Systems (ComForEn) 2024. Lorenz will present the paper at OSMSES and is looking forward to receiving feedback for further improving the work in progress!
The complete paper will be published in the conference proceedings and will be available in IEEE Xplore at a later date.
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