@misc{12284, abstract = {{Due to the increasingly widespread use of efficient power electronics, DC grids offer more and more advantages over AC grids. In the field of energy supply the use of DC technology is also growing and is state of the art in offshore, high-voltage, vehicle and data center applications. The spread of industrial open DC grids is currently starting and is completely different due to the requirements and the specifics of certain industrial applications such as conductor systems, e.g. monorail conveyer or rack feeder systems. This paper investigates multi feed in operation in industrial DC conductor systems, especially for transitions between loaded and load free conductor segments. For this purpose, a test bench consisting of two conductor segments is developed. Each segment is individually fed by an infeed converter. The transitions between segments will be analyzed regarding control behavior and stability.}}, author = {{Koch, Jan-Niklas and Otte, Raphael and Stuckmann, Tim and Warkentin, Slavi and Borcherding, Holger}}, booktitle = {{PCIM Europe 2024 International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}}, isbn = {{ 978-3-8007-6262-0}}, location = {{Nürnberg}}, pages = {{PP194}}, publisher = {{VDE Verlag}}, title = {{{Investigation of Load Transitions Between Loaded and Load Free Conductor Segments in Industrial Conductor Systems}}}, doi = {{10.30420/566262317}}, year = {{2024}}, } @misc{10403, abstract = {{Due to the increasingly widespread use of efficient power electronics, DC grids today offer more and more advantages over AC grids. Based on comparative measurements, this paper shows that an efficiency increase through DC can be achieved even with little recuperation potential of an existing system. In addition, other advantages such as peak load reduction by -43 %, power quality improvement and reliability are documented.}}, author = {{Warkentin, Slavi and Puls, Simon and Riethmüller, Simon and Blank, Frederic and Borcherding, Holger}}, booktitle = {{PCIM Europe 2023 International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}}, isbn = {{978-3-8007-6091-6}}, location = {{Nürnberg}}, pages = {{PP167}}, publisher = {{VDE Verlag}}, title = {{{Measured Advantages of a Production Plant with DC Grid in terms of Energy Efficiency, Peak Power Reduction and Power Quality}}}, doi = {{10.30420/566091273}}, year = {{2023}}, } @misc{10405, abstract = {{Due to the increasingly widespread use of efficient power electronics, DC grids today offer more and more advantages over AC grids. In the field of energy supply, the use of DC technology is also growing and is state of the art in offshore, high-voltage, vehicle and data center applications. The spread of industrial open DC grids is currently starting and is completely different due to the requirements. The DC links of each device are connected directly and the capacitors of individual devices shall not be overloaded. Especially not by ripple currents from other devices. The paper describes the easy use of a measuring box which evaluates and optically displays the load of electrolytic capacitors. No further measuring equipment is required. The simple, temporary integration into a grid makes it easy to check whether capacitors of individual devices are overloaded, and their lifetime is limited.}}, author = {{Koch, Jan-Niklas and Puls, Simon and Borcherding, Holger and Warkentin, Slavi}}, booktitle = {{ größer Mesago Messe Frankfurt GmbH, Stuttgart (Hrsg.) PCIM Europe 2023 International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}}, location = {{Nürnberg}}, pages = {{PP060}}, publisher = {{VDE Verlag}}, title = {{{Conceptual Design of a Portable Measuring Box for Monitoring Ripple Currents affecting the Lifetime of Electrolytic Capacitors in Industrial Open DC Grids}}}, doi = {{10.30420/566091166}}, year = {{2023}}, } @misc{10404, abstract = {{Today DC offers far-reaching advantages over AC. Therefore, many devices have been equipped with an internal DC link for many years. In the field of energy supply, the use of DC technology is also growing and is state of the art in offshore, high-voltage, vehicle and data center applications. The spread of industrial open DC grids is currently starting and is completely different due to the requirements: The industrial DC grid is highly dynamic. This means that power varies greatly over time and therefore there is a large amount of capacitance with little damping. The paper describes possibilities of reduction and changing of DC link capacitors from devices and the resulting influences on the lifetime for both electrolytic and film capacitors.}}, author = {{Puls, Simon and Koch, Jan-Niklas and Warkentin, Slavi and Borcherding, Holger}}, booktitle = {{NEIS 2022 Conference on Sustainable Energy Supply and Energy Storage Systems}}, editor = {{Schlz, Detlef}}, location = {{Hamburg}}, pages = {{145--152}}, publisher = {{VDE Verlag}}, title = {{{Influence on Capacitor Lifetime due to Reduction of Link Capacitance for Devices operating on an Open Industrial DC grid}}}, year = {{2022}}, } @misc{8433, abstract = {{Today DC offers far-reaching advantages over AC. Therefore, many devices have been equipped with an internal DC link for many years. In the field of energy supply, the use of DC technology is also growing and is state of the art in offshore, high-voltage, vehicle and data center applications. The spread of industrial open DC grids is currently starting and is completely different due to the requirements: The industrial DC grid is highly dynamic. This means that power varies greatly over time and therefore there is a large amount of capacitance with little damping. The paper describes possibilities of outsourcing DC link capacitors from devices and the resulting influences on the lifetime.}}, author = {{Puls, Simon and Koch, Jan-Niklas and Warkentin, Slavi and Borcherding, Holger}}, booktitle = {{PCIM Europe 2022 International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management Proceedings}}, location = {{Nürnberg}}, publisher = {{VDE Verlag}}, title = {{{Influence of Link Capacitor Outsourcing and Reduction of Capacitors in DC fed Drive Inverters}}}, doi = {{10.30420/565822046}}, year = {{2022}}, } @misc{8417, abstract = {{Today DC offers far-reaching advantages over AC. Therefore, many devices have been equipped with an internal DC link for many years. In the field of energy supply, the use of DC technology is also growing and is state of the art in offshore, high-voltage, vehicle, data center applications. The spread of industrial open DC grids is currently starting and is completely different due to the requirements: The DC grid is highly dynamic. This means that the oscillation behavior must be investigated. The paper describes the characteristics and the limits of stability for an open industrial DC grid.}}, author = {{Puls, Simon and Warkentin, Slavi and Austermann, Johann and Borcherding, Holger}}, booktitle = {{PCIM Europe digital days 2021; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}}, location = {{Online}}, pages = {{87}}, publisher = {{VDE Verlag}}, title = {{{Characteristics and Possible Resonant Oscillations in an Open Industrial DC grid}}}, year = {{2021}}, } @misc{4284, abstract = {{In diesem Beitrag wird das Konzept einer Versuchsanlage für industrielle Gleichspannungs-netze vorgestellt. Diese besteht aus mehreren elektrischen Antriebssätzen (Prüfling und Last-maschine), aus verschiedenen uni- und bidirektionalen Gleichrichtern, aus dezentralen Ener-gieerzeugern (PV und BHKW) und mehreren Energiespeichern. Alle Geräte sind über ein ge-meinsames Gleichspannungsnetz gekoppelt. Gleichspannungsnetze ermöglichen einen sehr einfachen bidirektionalen Energieaustausch zwischen den angeschlossenen Geräten. Daher kann beispielsweise Bremsenergie bei elektrischen Antrieben ohne zusätzlichen Aufwand ge-nutzt werden und auch die Integration von dezentralen Energieerzeugungsanlagen wie Photo-voltaik (PV) oder Blockheizkraftwerden (BHKW) sowie von Energiespeichern ist deutlich einfa-cher als bei AC-Netzen. Das Besondere an dieser Anlage ist, dass die mechanischen Belastun-gen der Antriebe einer Produktionsmaschine realitätsnah nachgebildet werden können. In einem Echtzeit-Modell, umgesetzt in Matlab/Simulink, werden Sollwerte der Drehzahl- und Drehmomentenverläufe berechnet und mittels Feldbus an die jeweiligen Lastantriebswechsel-richter übermittelt. Dadurch ergeben sich an der Welle nicht nur reale mechanische Größen, sondern auch die sich im Gleichspannungsnetz einstellenden Ströme entsprechen denen einer realen Anlage. Somit kann z.B. untersucht werden, wie sich eine von AC- auf DC-Netz umge-rüstete Produktionsmaschine verhalten würde, ohne diese bauen zu müssen. Weiterhin können die Auswirkungen von Speichereinbindungen und Netzstörungen realitätsnah untersucht wer-den.}}, author = {{Warkentin, Slavi and Austermann, Johann and Borcherding, Holger}}, booktitle = {{AALE 2020 Automatisierung und Mensch-Technik-Interaktion 17. Fachkonferenz}}, editor = {{Jäkel, Jens and Thiel, Robert}}, isbn = {{978-3-8007-5180-8}}, location = {{Leipzig}}, pages = {{51--60}}, publisher = {{VDE-Verlag}}, title = {{{Modulare Versuchsanlage für ein industrielles Gleichspannungsnetz mit gesteuerten elektrischen Antrieben}}}, year = {{2020}}, } @misc{10401, abstract = {{Um das Potenzial von industriellen Gleichstromanlagen überprüfen zu können, hat die Technische Hochschule Ostwestfalen-Lippe in Lemgo eine Versuchsanlage konzipiert. Zudem lassen sich damit Einflüsse und wechselwirkungen einer Anlage auf ein DC-Verbundnetz simulieren. Das kompakte und flexible Transferzentrum ermöglicht quasi als „Produktionszelle in the Loop" die Untersuchung der Stabilität der Anlage sowie der Auswirkungen von Fehlerfällen. Ein besonderer Schwerpunkt liegt auf der Nachbildung bestehender AC-versorgter oder zukünftiger Produktionsmaschinen in DC. um Energieeinsparpotenziale aufzuzeigen und Entwicklungszeiten zu verringern.}}, author = {{Warkentin, Slavi and Austermann, Johann and Borcherding, Holger}}, booktitle = {{etz elektrotechnik & automation}}, number = {{7}}, pages = {{50--54}}, publisher = {{VDE}}, title = {{{Industrielles DC-Netz mit gesteuerten elektrischen Antrieben}}}, year = {{2020}}, } @misc{10402, abstract = {{In diesem Beitrag wird das Konzept einer Versuchsanlage für industrielle Gleichspannungsnetze vorgestellt indem alle Geräte über ein gemeinsames Gleichspannungsnetz gekoppelt sind. In einem Echtzeit-Modell, umgesetzt in Matlab/Simulink, werden Sollwerte der Drehzahl- und Drehmomentenverläufe berechnet und mittels Feldbus an die jeweiligen Lastantriebswechselrichter übermittelt. Dadurch ergeben sich an der Welle nicht nur reale mechanische Größen, sondern auch die sich im Gleichspannungsnetz einstellenden Ströme entsprechen denen einer realen Anlage. Somit kann beispielsweise untersucht werden, wie sich eine von AC- auf DC-Netz umgerüstete Produktionsmaschine verhalten würde, ohne diese bauen zu müssen. Weiterhin können die Auswirkungen von Speichereinbindungen und Netzstörungen realitätsnah untersucht werden.}}, author = {{Warkentin, Slavi and Austermann, Johann and Borcherding, Holger}}, booktitle = {{atp magazin}}, issn = {{2364-3137 }}, number = {{10}}, pages = {{54--59}}, publisher = {{Vulkan-Verlag GmbH}}, title = {{{ Modulare Versuchsanlage für ein industrielles DC-Netz : Potenziale industrieller Gleichstromanlagen }}}, volume = {{62}}, year = {{2020}}, } @misc{8439, abstract = {{The Paper presents the concept of an experimental plant, which is to be built within the framework of the research project DC-INDUSTRIE2. This system consists of a multitude of electrical drives, various uni- and bidirectional rectifiers, several decentralized energy suppliers and several energy storage units. All devices in this system are coupled via a common DC Grid. DC Grids allow a very simple bidirectional energy exchange between the connected devices. Therefore, braking energy in electric drives, for example, can be used without additional effort and the integration of decentralized energy supplier systems such as photovoltaic (PV) or combined heat and power plants (CHP) as well as energy storage systems is much easier than in AC Grids. The purpose of the experimental plant is to electrically emulate a typical production machine or process and to investigate the real occurring currents and energy flows in the DC Grid. A total of 11 drive sets are available for this purpose, each consisting of a test machine and a load machine. The modeling of the actual production machine is done in MATLAB/Simulink. Speed and torque curves are calculated here and transmitted to the drive inverters via fieldbus. Thus, not only real mechanical quantities are obtained at the shaft, but also the currents in the DC Grid correspond to those of a real plant. Therefore it can be investigated, for example, how a production machine converted from AC to DC power would behave without having to build it. Furthermore, the effects of storage connections and grid disturbances can be realistically investigated.}}, author = {{Warkentin, Slavi and Austermann, Johann and Borcherding, Holger}}, booktitle = {{NEIS 2020 Conference on Sustainable Energy Supply and Energy Storage Systems}}, editor = {{Schlz, Detlef}}, isbn = {{978-3-8007-5359-8}}, location = {{Hamburg}}, pages = {{197--202}}, publisher = {{VDE Verlag}}, title = {{{Modular Experimental Plant for Industrial DC Grid with Controlled Electrical Drives}}}, year = {{2020}}, }