@misc{12032, abstract = {{As DC grids become more widespread in industry, the demand for DC industry-compliant power supplies is increasing. This paper describes the design and analysis of a SiC-based Active-Front-End with a switching frequency of 100 kHz and an output power of 50 kW. The focus of this Active-Front-End is on the small input inductance (uk=0,6%), which has been deliberately reduced in order to reduce package size. For a small inductance a high switching frequency and a fast and precise current measurement are basic requirements. The increase of the switching frequency reduces the size of the whole filter.}}, author = {{Otte, Raphael and Koch, Jan-Niklas and Borcherding, Holger and Stuckmann, Tim}}, booktitle = {{PCIM Europe : International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, 11-13 June 2024, Nuremberg}}, isbn = {{978-3-8007-6262-0}}, keywords = {{DC-Industry, DC-Grids, AIC, AFE, Active-Infeed-Converter, Active-Front-End}}, location = {{Nürnberg}}, pages = {{3402}}, publisher = {{VDE Verlag}}, title = {{{Design and Analysis of a 50kW SiC-based Active-Front-End with a very small line choke for DC-Grids}}}, year = {{2024}}, } @misc{8467, abstract = {{A decarbonisation of the energy system is necessary to reduce greenhouse gas emissions and thus achieve the climate protection goals. For this reason, the renewable energy share in the power grids of many countries is increasing. In order to stabilize the energy system and increase its flexibility, energy management systems are needed. This paper offers a model of energy management system which starts from the network operator and ends at the consumer (an electric vehicle). Firstly, a controllable local system signal, which is sent through a smart meter gateway from the grid operator to the consumer, has been developed. The signal is based on the renewable energy share in the local grid, on the electricity exchange price and on a defined profile. Then, different charging modes, which regulate the energy consumption based on the signal, have been developed and field tested. Finally, the charging modes have been simulated in order to better compare the data. The results show that with smart charging, 90% of the energy demand can be rescheduled. In view of the load shifting, greenhouse gas emissions and energy costs can be reduced.}}, author = {{Schaffer, Maria and Bollhöfer, Fynn Christian and Üpping, Johannes}}, booktitle = {{International Journal of Energy Production and Management}}, issn = {{2056-3280 }}, keywords = {{electric vehicles, energy management systems, load shifting, renewable energy, smart grids.}}, number = {{2}}, pages = {{101 -- 113}}, publisher = {{WIT Press}}, title = {{{Load shifting potential of electric vehicles using management systems for increasing renewable energy share in smart grids}}}, doi = {{10.2495/EQ-V7-N2-101-113}}, volume = {{7}}, year = {{2022}}, } @misc{8430, abstract = {{This article highlights the special electrical properties of an industrial DC grid and compares it with other typical DC grids. In this article, the extent of transient overvoltages is presented, which must be assumed to be caused by grid faults and switching operations. Basic measures for the protection of devices are listed and evaluated. The article clarifies that basic protection is necessary for the reliable operation of devices in industrial DC grids, but is easy to implement.}}, author = {{Borcherding, Holger and Austermann, Johann and Puls, Simon}}, booktitle = {{2021 22nd IEEE International Conference on Industrial Technology (ICIT)}}, isbn = {{978-1-7281-5730-6}}, issn = {{2643-2978}}, keywords = {{drive inverters, DC grid, overvoltage protection, DC grid faults}}, location = {{Valencia, Spain; Online}}, pages = {{625--630}}, publisher = {{IEEE}}, title = {{{Potential Hazards of Transient Overvoltages in an Industrial DC Grid and Basic Protective Measures}}}, doi = {{10.1109/ICIT46573.2021.9453597}}, year = {{2021}}, } @misc{8434, abstract = {{An open industrial DCgrid for energy supply has many benefits. Also new challenges arise by coupling the DClink capacitors of all devices, e.g. inverters. This paper presents the effects of component failures causing short circuit faults in combination with electrically coupled and charged DClink capacitors. Resulting energy flows are shown, which arise in the DCgrid in case of faults. In addition, measurements of short circuit tests and two solutions are shown, which enable the safe and simple operation of an open industrial DCgrid.}}, author = {{Borcherding, Holger and Blank, Frederic and Grünberg, Olaf and Höflsauer, Josef and Puls, Simon}}, booktitle = {{2021 23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe)}}, isbn = {{978-1-6654-3384-6}}, issn = {{2325-0313}}, keywords = {{DC power supply, Fault handling strategy, Short circuit, Grid-connected inverter, DC machine}}, location = {{Virtuell}}, publisher = {{IEEE}}, title = {{{EFFECTS OF COMPONENT FAILURES IN DRIVE INVERTERS DURING PARALLEL OPERATING ON AN OPEN INDUSTRIAL DC GRID}}}, doi = {{10.23919/EPE21ECCEEurope50061.2021.9570706}}, year = {{2021}}, } @misc{4918, abstract = {{An open industrial DC grid has a lot of advantages. Also new challenges arise by coupling several DC link capacitors of inverters. This paper presents an approach and measurements of an active device protection to withstand possible faults that can occur in the DC grid. In particular, robustness in the event of faults plays a key role.}}, author = {{Puls, Simon and Obernolte, Urs and Borcherding, Holger and Ehlich, Martin}}, booktitle = {{2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe VIRTUAL)}}, isbn = {{978-1-7281-9807-1}}, issn = {{2325-0313}}, keywords = {{DC grid, fault handling strategy, DC-power supply, active protection, drive inverters}}, location = {{Lyon, France}}, publisher = {{IEEE}}, title = {{{Approach of an Active Device Protection for Drive Inverters against Short Circuit Faults in an Open Industrial DC Grid}}}, doi = {{10.23919/EPE20ECCEEurope43536.2020.9215949}}, year = {{2020}}, } @inproceedings{328, abstract = {{In this paper, concepts for an extended DC network for the main power supply of components from various manufacturers in industrial production are presented. In the first part, detailed requirements for such a network are given from the viewpoint of a customer. Based on those, different concepts for AC/DC conversion and energy management are discussed. As far as AC/DC conversion is concerned, the advantages and drawbacks of several rectifier topologies are listed, as they have a significant impact on the system behavior and EMC properties. An intelligent energy management can improve the energy efficiency and reduce downtimes of a plant, which are major requirements from a customer’s viewpoint. }}, author = {{Borcherding, Holger and Austermann, Johann and Kuhlmann, Timm and Weis, Benno and Leonide, Andre}}, booktitle = {{2017 IEEE Second International Conference on DC Microgrids (ICDCM)}}, keywords = {{AC-DC power convertors, electromagnetic compatibility, energy conservation, energy management systems, rectifiers, main power supply, industrial production, DC network, AC-DC conversion, rectifier topologies, EMC properties, intelligent energy management, energy efficiency improvement, downtime reduction, Rectifiers, Switches, Voltage control, Topology, Network topology, Production, Grounding, industrial DC grid, SMART Grid}}, location = {{Nürnberg}}, number = {{1}}, pages = {{227--234}}, title = {{{Concepts for a DC Network in Industrial Production}}}, doi = {{10.1109/ICDCM.2017.8001049}}, year = {{2017}}, } @inproceedings{273, abstract = {{This paper introduces an efficient modular solution kit for intralogistic drives, which reduces the total energy consumption of all drives in an automated warehouse by more than 15%. The reduction of energy consumption results from the interaction of optimized components (motors, control techniques and regeneration units), which are described in detail in this paper. Different motor concepts like the induction motor, the synchronous reluctance motor and the permanent magnet synchronous machine are compared according to the special requirements for intralogistics applications. Different control techniques are presented in order to achieve sensorless and efficient-optimal operation of these motors. The sensorless control technique uses signal injection to detect the rotor position sufficiently exact also in case of speed near standstill. Efficient-optimal operation is achieved by reducing the motor current with regard to the torque (MTPA-control). Furthermore this paper introduces a regeneration unit that can be connected between the DC link of frequency inverters and the mains to feed back regenerative energy. The regeneration unit consisting of a buck converter, a synchronous inverter and a line-filter can work in parallel to commonly used uncontrolled rectifiers. Its functioning is shown with the help of measurement results of a 1kW laboratory prototype. The last section shows a demonstrator in which a conventional conveyer system (with induction motor and braking resistor) is compared with an optimized one using the presented components. Power versus time measurements show specific energy savings resulting from the interaction of the optimized components.}}, author = {{Austermann, Johann and Borcherding, Holger and Stichweh, H. and Grabs, Volker}}, booktitle = {{2016 18th European Conference on Power Electronics and Applications (EPE'16 ECCE Europe)}}, isbn = {{978-3-8007-4186-1}}, keywords = {{electric current control, induction motors, invertors, permanent magnet motors, reluctance motors, sensorless machine control, torque control, modular solution kit, intralogistic drives, automated warehouse, energy consumption reduction, optimized components interaction, induction motor, synchronous reluctance motor, permanent magnet synchronous machine, sensorless control technique, signal injection, rotor position, motor current, MTPA-control, regeneration unit, DC link, frequency inverters, buck converter, synchronous inverter, line-filter, Induction motors, Reluctance motors, Permanent magnet motors, Rotors, Torque, Inverters, intralogistics, reluctance motor, sensorless control, regeneration unit, braking energy}}, location = {{Karlsruhe}}, pages = {{1639--1646}}, publisher = {{VDE Verlag}}, title = {{{High Efficient Modular Drive System - An Ideal Approach for Green Intralogistics Applications}}}, doi = {{10.1109/EPE.2016.7695687}}, year = {{2016}}, }