VGB POWERTECH 10 (2020) - International Journal for Generation and Storage of Electricity and Heat

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Focus: Power plant maintenance
Digitalisation
Fokusthema: Anlagenbetrieb
Digitalisierung
DigiPoll@Energy 2020: Digitalization in
the Energy Sector – Status-quo, outlook
and need for action
DigiPoll@Energy 2020: Digitalisierung im
Energiesektor – Status-quo, Ausblick und
Handlungsbedarf
Paul Weigel and Klaus Görner
Imprint
Digitalization possibilities and the
potential of the Digital Twin for
steam supply systems
Digitalisierungsmöglichkeiten und das Potenzial
des Digital-Twin für Dampfversorgungssysteme
Lukas Kasper, Thomas Bacher, Felix Birkelbach
and René Hofmann
Gas Turbine Combustors with Constant
Volume Heat Addition
Gasturbinen mit Gleichraumverbrennung
Friedrich Hala
Each aspect of modelling this 5D‐DT is discussed in the following subsections. In Section 4.6 a
demonstrative use cases and an economic evaluation is presented. A more in‐depth treatment of this
topic can be found in the final report of the DigiSteam project [13].
Figure 3‐ 5D‐DT model of a Steam Generator, adapted from [50]. The Physical Steam Generator (1) in the physical space is
linked via the Connection dimension (2) to the virtual space, which consists of the Digital Steam Generator (3), i.e. virtual
entity, the Data model (4) and the Service model (5).
5D-DT model of a steam generator
4.1 Physical entity
The To physical be entity published consists of all functional in the subsystems article and any “Digitalization
physical sensor/actuator technology
that is built into the steam supply system.
possibilities and the potential of the Digital Twin
for steam supply systems”
4.2 Communication model
The communication model in a 5D‐DT fulfils the basic task of establishing connections between all
other parts of the model, most importantly between the real and virtual space. It is only through this
by Lukas Kasper, Thomas Bacher,
bidirectional communication infrastructure that the 5D‐DT has the ability to access data from the
physical Felix entity Birkelbach and process it digitally and to obtain René relevant Hofmann
information. Essential characteristics of the
communication model are real‐time capability, integration of heterogeneous end‐devices, scalability
and security [55].
Exemplary communication infrastructures for I4.0 and Digital Twins based on IoT technology are
given in [56, 57]. The use of open communications standards for industrial automation, notably OPC
Unified Architecture (OPC UA) are highly encouraged in literature. OPC UA also provides the basis for
further information modeling in the data model.
4.3 Virtual entity
The virtual entity of the DT is a high‐fidelity representation of the physical entity. The virtual entity
reproduces the geometry, physical properties, behaviours and rules of the physical entity in the
virtual world [50]. The coupling of these four sub model classes is used to form a complete mirror
image of the physical entity. In addition to this division in sub model classes, a modular modelling
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