The utility domain is facing new problems in both transmission and distribution systems.
Better reliability and more efficiency of the overall systems is one of the main goals of the
smart grid. The smart grid incorporates a lot of stakeholders, it has to deal with a very high
complexity of the system, it should facilitate a whole industry transition, it brings up new
security and safety issues and it has to be an enabler for a consensus on standards as well as
their development and support. Technically, there are many challenges in terms of smart
equipment, communication systems, data management, cyber security, information and data
privacy and new software applications. In our research activities Semantic Web Technologies
are emphasized as an appropriate solution to face the beforehand mentioned challenges. In
this contribution, we present three different use cases concerning the issues interoperability,
security and communication as follows.
In the context of our interoperability use cases, we particularly model IEC TC 57 Standards as
ontologies and develop ontology alignments in order to harmonize the data quality codes
according to IEC 62361.
The security use case deals with creating an overall security management ontology, by
connecting three different ontology parts (i) domain specific data models (ii) non-functional
requirements and (iii) security concepts. The overall ontology provides important information
which can allow users to gain additional information by allowing search and reasoning
In the communication use case it is essential to have a common basis for semantics and syntax
provided by a domain specific ontology. Thus, the Common Information Model (CIM, IEC
61970/61968) should be the basis for all communication processes on the different layers
using semantic web services. Focusing on the power infrastructure communication the OPC
UA (IEC 62541) is the choice.