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"Energy flexibility is the ability of a user, grid connection point or device to be flexible and vary the production and consumption of energy or electricity (e.g., shifting in time, changing power, modulating energy bandwidth). Energy flexibility has emerged as a recurring concept in the InterConnect use cases and services during the ontological requirement specification activity. As such, T2.4 has used energy flexibility as a core concept for the ontology development and created a dedicate module (ic-flex, described in Section 4.7) that not only accommodates the various needs concerning flexibility of the partners in the pilots, but also takes into account important related standardization initiatives, such as the standardization of the S2 interface by CLC TC 20520 WG18 - Smart Grids, Home and Building Electronic Systems (HBES). The name S2 points to an interface at the consumer premises that is the basis for the 50491-12 standard series (formally standardized in EN50491-12-1). The S2 interface is used to communicate the flexibility of smart devices to a Customer Energy Manager (CEM) and to allow for control of that flexibility. The full S2 specification is the subject of the upcoming EN50491-12-2 standard21. Through the S2 interface, a so-called Resource Manager is capable (if supported by the underlying smart device) to provide power/energy measurements and forecasts to a CEM. In addition to these basic and generic functions, the S2 interface also features five control types that represent different types of energy flexibility. We have used the specification of the S2 interface in EN50491-12-2 to create a dedicated ontology module (ic-s2 module) as part of the flexibility ontology described in Section 4.7."
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- Interconnect Deliverable 2.3, section 3.3
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"The S2 ontology (ic-s2 module) has been designed to thoroughly follow the S2 specification of the EN50491-12-2 standard (see Section 3.3). As ic-s2 reflects the S2 underlying data model, it is a rather detailed ontology compared to the more general nature of the ic-flex module represented in Figure 12. For this reason, the ic-s2 module is not presented in this document, but is available in the public InterConnect ontology repository."
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- Interconnect Deliverable 2.3, section 4.7
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