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  <doc>
    <id>2859</id>
    <completedYear/>
    <publishedYear>2022</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>IEEE</publisherName>
    <publisherPlace/>
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    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Hybrid EMT and Phasor based MMC-HVDC Model for Advanced Power System Simulation</title>
    <abstract language="eng">The objective of this paper is the implementation and comparison of a hybrid phasor-based (RMS) and electromagnetic transient (EMT) modular multilevel converter high voltage direct current (MMC-HVDC) model for advanced and detailed studies of large power systems. The general modeling approach for hybrid simulation of modular multilevel converters for HVDC applications with the corresponding control concepts is described. The HVDC model can be divided into AC and DC components with different simulation time steps and representation using network partitioning. The connected AC grids and converter models are considered in the phasor-based time domain, while the DC connection is simulated in the electromagnetic-transient time domain. The coupling of the models is established by the total energy control of the MMC. The hybrid approach is evaluated in comparison to an average MMC HVDC model in an EMT simulation. The results show the advantages of the hybrid model. The model can be simulated with comparatively low computational effort, while the DC transients can be represented in detail during disturbances.</abstract>
    <identifier type="url">10.1109/PESGM48719.2022.9917109</identifier>
    <enrichment key="opus.source">publish</enrichment>
    <author>Alexander Raab</author>
    <author>Dominik Frauenknecht</author>
    <author>Anatoli Wellhöfer</author>
    <author>Matthias Luther</author>
    <author>Ananya Kuri</author>
    <thesisPublisher>Hochschule für Angewandte Wissenschaften Würzburg-Schweinfurt</thesisPublisher>
  </doc>
  <doc>
    <id>3010</id>
    <completedYear/>
    <publishedYear>2019</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>IEEE Computer Society Press</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">A Novel Co-Simulation Concept using Interprocess Communication in Shared Memory</title>
    <abstract language="eng">The paper describes a novel co-simulation concept for power system analysis using interprocess communication via shared memory. This innovative approach enables manufacturers, utilities and other parties a continuous and efficient use of simulation models within the phases of preliminary investigations, planning, design and operation. It paves the way for the practical implementation of the concept of a digital twin. Besides the technical specification of the process communication, the realization of process synchronization and the model interfaces are comprehensively discussed. Performance topics are practically treated. Finally, as an application of the novel concept, a successfully implemented study in a power system simulation tool is demonstrated in order to prove its practical feasibility.</abstract>
    <parentTitle language="eng">2019 IEEE Power and Energy Society General Meeting</parentTitle>
    <identifier type="doi">10.1109/PESGM40551.2019.8973964</identifier>
    <identifier type="isbn">978-1-7281-1981-6</identifier>
    <identifier type="issn">1944-9925</identifier>
    <author>Christian Scheibe</author>
    <author>Anatoli Semerow</author>
    <author>Jasmin Menke</author>
    <author>Piergiovanni La Seta</author>
    <author>Alexander Raab</author>
    <author>Gert Mehlmann</author>
    <author>Matthias Luther</author>
  </doc>
  <doc>
    <id>5394</id>
    <completedYear/>
    <publishedYear>2023</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>IEEE</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Hybrid Phasor- and EMT-based Multi-Terminal MMC-HVDC Model with Grid-Forming Control</title>
    <abstract language="deu">The objective of this paper is to apply a hybrid phasor-(RMS) and electromagnetic transient-based (EMT) simulation approach to a multi-terminal modular multilevel converter high voltage direct current (MT MMC-HVDC) model. The MMC of the MT-HVDC are implemented with grid-following and grid-forming control. An overview of the MT MMC-HVDC is given and the grid-forming and voltage droop control are described. The AC and DC networks of the MMC are divided into an RMS and an EMT partition with different simulation time steps. The grid-forming and grid-following control with inner AC current control are assigned to the RMS partition. The total energy and inner converter control are assigned to the EMT partition. The model is initialized for a correct transition from power flow to time domain simulation. The approach is implemented in a meshed power system model, where grid-forming MMC provide voltage and frequency for an offshore wind farm and a synchronous grid. The simulations are performed with the AC networks in RMS and the DC networks in EMT. The results show that the interactions between the AC and DC grids can be studied in a hybrid simulation framework. The DC system response is detailed, while the AC system is reduced to machine and controller dynamics.</abstract>
    <parentTitle language="eng">2023 IEEE Power &amp; Energy Society General Meeting (PESGM)</parentTitle>
    <identifier type="doi">10.1109/pesgm52003.2023.10253370</identifier>
    <identifier type="isbn">978-1-6654-6441-3</identifier>
    <identifier type="issn">1944-9933</identifier>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">true</enrichment>
    <author>Alexander Raab</author>
    <author>Dominik Frauenknecht</author>
    <author>Gert Mehlmann</author>
    <author>Matthias Luther</author>
    <author>Anatoli Wellhöfer</author>
    <collection role="institutes" number="fe">Fakultät Elektrotechnik</collection>
  </doc>
  <doc>
    <id>6350</id>
    <completedYear/>
    <publishedYear>2024</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
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    <creatingCorporation/>
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    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Stability Analysis of Converter-Dominated Power Systems by Phasor-Based and Electromagnetic Transient Simulation</title>
    <parentTitle language="deu">15. VDE ETG/VDI/VDE-GMA-Fachtagung „Netzregelung und Systemführung“</parentTitle>
    <identifier type="isbn">978-3-8007-6292-7</identifier>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">true</enrichment>
    <author>Dominik Frauenknecht</author>
    <author>Bernd Schweinshaut</author>
    <author>Alexander Raab</author>
    <author>Gert Mehlmann</author>
    <author>Matthias Luther</author>
    <author>Pascal Wiest</author>
    <author>Chris Oliver Heyde</author>
    <author>Anatoli Wellhöfer</author>
    <collection role="institutes" number="ieht">Institut für Energie- und Hochspannungstechnik (IEHT)</collection>
    <thesisPublisher>Technische Hochschule Würzburg-Schweinfurt</thesisPublisher>
  </doc>
</export-example>
