Power Electronics and Grid Integration

In the research topic Power Electronics and Grid Integration, our work focuses on the following fields of work:

Power Electronics for Medium Voltage Applications

Efficient and High-Frequency Power Electronics

Power Electronics for PV and Storage Systems

Power Electronics for Electric Mobility

High Power Converters

Power Electronics for Power Grids

Within the research topic "Power Electronics and Grid Integration", we research, develop, test and evaluate power electronic components, circuits and innovative system concepts. We constantly strive to set new standards and work together with our partners from industry and research to bring advanced ideas to market.

Electricity from renewables is the energy source of the future and the key to a CO2-neutral, sustainable and economical energy supply. Power electronics are indispensable for the successful implementation of the energy and transport transition. Power electronic converters ensure efficient conversion of electrical energy and regulate voltage and frequency in the grids.

In modern energy systems, power converters are the essential link, connecting photovoltaic and wind power plants, battery storage systems and electrolysers as well as electronic consumers and electric vehicles to the power grid. Power converters are increasingly being used to regulate power flows in the power grid, for example in HVDC or STATCOM systems. Electrification in all areas of mobility, from electric cars to electric aviation, requires a variety of different types of power converters. In addition, the use of power electronics in industrial environments is enabling increasingly efficient production methods. Modern heat supply concepts are also increasingly being equipped with power electronic converters. The overall demand for power electronics and application-optimized system concepts is enormous.

The shutdown of conventional power plants also raises the question of how reliable voltage and frequency control can be ensured in future converter-based grids. The grid integration of power electronics is already one of the most important challenges for the stable operation of power grids. With our concepts for grid-forming converters, we offer solutions that make power electronics the central pillar of grid stability every millisecond. We simulate and test the safe operation of future electricity grids based on 100% renewable energies and we are constantly developing our approaches and methods.

We have extensive laboratory equipment at our disposal for our research work and services. This enables us to operate power converters in the low and medium voltage level and to research grid integration issues up to the multi-megawatt range.

 

For our research and development activities, we operate the laboratories, Power Converter Lab, Multi-Megawatt Lab and the Medium Voltage Lab, in our "Center for Power Electronics and Sustainable Grids" at the Zinkmattenstrasse site. In addition, we have access to a 5-MW PV power plant in Dürbheim in the Swabian Alb for research and development purposes.

 

Center for Power Electronics and Sustainable Grids

In our TestLab Power Electronics we characterize for you: PV inverters, battery converters, CHPs, DC/DC converters, uni- and bidirectional chargers, module-integrated electronics up to the multi-megawatt range.

 

TestLab Power Electronics

Selected Research Projects

 

HYBAT

Hybrid Lithium-Ion Battery Storage Solution with 1500 V Systems Technology, Innovative Thermal Management and Optimizing Operation Management

 

power4re

Reliable Power Converter for the Provision of Renewable Energy

 

Q-Integral

Reactive Power Management in Use with Dynamic Reactive Power Sources at the Interface of Distribution Grid and Transmission Grid

Power electronics represents an extremely comprehensive discipline and includes the fields of semiconductor, analog, digital, circuit, control, cooling, packaging and interconnection technology. Technological progress in the field of power electronic components, especially in so-called wide-band-gap semiconductors (e.g. SiC, GaN), enables more efficient, compact and resource-saving power converter solutions. In addition, questions about the stable operation of converter-based grids and systems are of increasing importance. Our researchers face the exciting challenges associated with these issues every day.

Our services include:

Contacts

Sönke Rogalla

Contact Press / Media

Dr. Sönke Rogalla

Power Electronics and Grid Integration

Fraunhofer ISE
Heidenhofstr. 2
79110 Freiburg

Phone +49 761 4588-5454

Stephan Liese

Contact Press / Media

Stephan Liese

Power Electronics and Grid Integration

Fraunhofer ISE
Heidenhofstr. 2
79110 Freiburg

Phone +49 761 4588-5890

Christian Schöner

Contact Press / Media

Christian Schöner

Business Developer Power Electronics and Grid Integration

Fraunhofer ISE
Heidenhofstr. 2
79110 Freiburg

Phone +49 761 4588-2078

Contact Press / Media

Kerstin Stehle

Administrative Assistant

Fraunhofer ISE
Heidenhofstr. 2
79110 Freiburg

Phone +49 761 4588-2140

Contact Press / Media

Administrative Assistant

Current Publications - Power Electronics and Grid Integration

Jahr
Year
Titel/Autor:in
Title/Author
Publikationstyp
Publication Type
2022 Stabilitätsbetrachtung von Wind- und Photovoltaikparks bei Blindleistungseinspeisung
Grab, R.
Konferenzbeitrag
Conference Paper
2022 Einfluss verschiedener FRT-Konzepte auf das Verhalten von Energieerzeugungsanlagen bei Netzfehlern
Kaiser, S.; Eichner, S.
Konferenzbeitrag
Conference Paper
2022 Modellierung einer FRT-Prüfeinrichtung und simulative Betrachtung der Netzrückwirkungen - Vergleich mit Labormessdaten
Kaiser, S.; Eichner, S.; Adel Sufian, A.E.
Konferenzbeitrag
Conference Paper
2022 Netzbildende Wechselrichter in Verbundnetzen - Abschließende Ergebnisse aus dem Forschungsprojekt VerbundnetzStabil
Rogalla, S.; Denninger, R.; Ernst, P.; Greulich, A.; Lens, H.; Salman, A.; Schaupp, T.; Singer, R.; Ungerland, J.
Konferenzbeitrag
Conference Paper
2021 Frequenzstabilität bei Netzauftrennungen im Verbundnetz - Einfluss netzbildender Umrichter auf die Frequenzstabilität
Denninger, R.; Nuschke, M.
Vortrag
Presentation
2021 5-kW-DC/DC-Wandler mit hohem Teillastwirkungsgrad für 48-V-Heimspeicher
Hercegfi, P.
Konferenzbeitrag
Conference Paper
2021 Ein Testverfahren für netzbildende Wechselrichter - Der nächste notwendige Schritt für den stabilen Betrieb stromrichterdominierter Netze
Rogalla, S.; Denninger, R.; Ernst, P.; Singer, R.; Greulich, A.; Kersic, M.; Müller, T.
Konferenzbeitrag
Conference Paper
2021 Vergleich verschiedener OVRT-Prüfstände im Zusammenhang mit realistischen Überspannungsereignissen
Eyhorn, S.; Kaiser, S.; Rogalla, S.; Kaiser, S.
Konferenzbeitrag
Conference Paper
2021 Reactive Power Availability of a 20 kW Three Phase Three Level PFC
Mahajan, A.; Siedle, C.
Konferenzbeitrag
Conference Paper
2021 Impact of Changed Reactive Power Flows on Protection Relays in the Future Distribution Grid
Eichner, S.; Arshad, M.A.; Grab, R.; Jahr, A.
Konferenzbeitrag
Conference Paper
2021 Series-Resonant-Converter with Galvanic Isolation and >99% Efficiency
Bornwasser, J.
Konferenzbeitrag
Conference Paper
2021 Universelle Umrichterregelung für ein- und dreiphasige Systeme im Netzparallel- und Inselnetz-Betrieb
Siedle, C.
Konferenzbeitrag
Conference Paper
2021 Compact GaN Charger with Wide Output Voltage Range for the Universal Usage in Electrical Vehicles with Battery Voltages from 200 to 1000 V
Armbruster, C.
Konferenzbeitrag
Conference Paper
2021 Q-Dynamik: Blindleistungsstellgeschwindigkeiten im Verteilnetz
Grab, R.; Rauch, J.; Götz, R.; Brückl, O.; Eichner, S.; Engel, B.
Konferenzbeitrag
Conference Paper
2021 Grid Forming Converters in Interconnected Systems - Final Results from the Joint Research Project VerbundnetzStabil
Rogalla, S.; Greulich, A.; Lehner, J.; Lens, H.; Ernst, P.; Schaupp, T.; Singer, R.; Ungerland, J.; Schöll, C.; Denninger, R.; Salman, A.
Vortrag
Presentation
2021 Untersuchung verschattungsoptimierter Halbzellenmodule mit einlaminierter Leistungselektronik für das MPP-Tracking auf Substring-Ebene
Armbruster, C.; Kutter, C.; Schmid, A.; Tummalieh, A.; Rouffaud, G.; Basler, F.; Wille-Hausmann, B.; Famulla, J.; Schüler, M.A.; Oyebanji, U.O.
Konferenzbeitrag
Conference Paper
2021 Universelle Umrichterregelung für ein- und dreiphasige Systeme im Netzparallel- und Inselnetz-Betrieb
Siedle, C.; Reichert, S.; Stickan, B.; Rauscher, M.
Konferenzbeitrag
Conference Paper
2021 Expert Input Paper - Eco-Design & Energy Labelling for Photovoltaic Modules, Inverters and Systems in the EU
Wade, A.; Neuhaus, H.; Probst, L.; Sauer, T.; Moser, D.; Rohr, C.; Rossi, R.; Wirth, H.
Bericht
Report
2021 Highly Compact 250 kVA Inverter Stack with 3.3 kV SiC MOSFETs
Thoma, J.; Volzer, B.; Kranzer, D.; Derix, D.; Geiss, M.; Hensel, A.
Konferenzbeitrag
Conference Paper
2020 Ökobilanz eines Solarwechselrichters
Probst, L.; Liardet, L.; Rouffaud, G.
Konferenzbeitrag
Conference Paper
2020 Wirkungsgrad von Wechselrichtern bei Blindleistungseinspeisung
Grab, R.
Konferenzbeitrag
Conference Paper
2020 Comparison of Different OVRT Test Benches in the Context of Realistic Over-voltage Events
Eyhorn, S.; Kaiser, S.; Rogalla, S.; Klosse, R.
Konferenzbeitrag
Conference Paper
2020 6-W Optical Power Link with Integrated Optical Data Transmission
Helmers, H.; Armbruster, C.; Ravenstein, Moritz von; Derix, D.; Schöner, C.
Zeitschriftenaufsatz
Journal Article
2020 Analysis of the Overvoltage Behavior in Interconnected Operation and Determination of Costs for an Extended Overvoltage Capability of Generation Units
Eichner, S.; Salman, A.; Chen, Y.; Shahid, S.
Konferenzbeitrag
Conference Paper
2020 Investigation of Network Protection Coordination with Changed Reactive Power Flows in the Future Grid
Eichner, S.; Arshad, M.A.; Grab, R.
Konferenzbeitrag
Conference Paper
2020 Measured Impedance Characteristics of Solar Inverters up to 1 MW
Rogalla, S.; Kaiser, S.; Burger, B.; Engel, B.
Konferenzbeitrag
Conference Paper
2020 Improving, Modelling and Simulation of Droop Controller for Grid-forming Inverters in DIgSILENT PowerFactory
Pham, P.N.; Salman, A.; Singer, R.
Konferenzbeitrag
Conference Paper
2020 Determination of the Frequency Dependent Thévenin Equivalent of Inverters using Differential Impedance Spectroscopy
Rogalla, S.; Kaiser, S.; Burger, B.; Engel, B.
Konferenzbeitrag
Conference Paper
2020 Dynamic Capabilities of Distributed Reactive Power Sources
Grab, R.; Köppe, H.; Nielsen, L.; Eichner, S.; Rogalla, S.; Engel, B.
Konferenzbeitrag
Conference Paper
2019 Spectrum Shaping Methods for Predictive Control Approaches Applied to a Grid-Connected Power Electronics Converter
Stickan, B.; Rutquist, P.; Geyer, T.; Diehl, M.
Konferenzbeitrag
Conference Paper
2019 Übergeordnetes Regelungskonzept für PV-Heimspeichersysteme und deren Anforderungen an die Leistungselektronik
Probst, Leonhard; Denninger, Rebekka; Gasser, Corentin; Armbruster, Cornelius
Konferenzbeitrag
Conference Paper
2019 Netzimpedanzemulation zur Stabilitätsprüfung von Wechselrichter
Ackermann, F.; Schlick, S.; Rogalla, S.
Konferenzbeitrag
Conference Paper
2019 Partial-Load Optimization of a High-Voltage Residential Battery Converter with Silicon Carbide MOSFETs
Probst, Leonhard; Kutzleben, Daniel von; Armbruster, Cornelius; Schöner, Christian
Konferenzbeitrag
Conference Paper
2019 Modulare Leistungselektronik für Heimspeichersysteme
Probst, Leonhard; Armbruster, Cornelius; Ehrlich, Alexander; Bettermann, Hartmut; Appel, Tobias; Benner, Daniel
Konferenzbeitrag
Conference Paper
2019 Tiefsetzsteller für den Einsatz von 1500-V-PV Modulen an 1000-V-Wechselrichterbrücken
Siedle, Christoph; Liese, Stephan; Ulbrich, Sebastian; Göbkes, Helmut
Konferenzbeitrag
Conference Paper
2019 Untersuchung einer galvanisch getrennten DC/DC-Topologie als Eingangsstufe eines PV-Modulwechselrichters mit Teilstringanbindung
Schöner, Christian; Rouffaud, Gilles; Probst, Leonhard; Schmidt, Heribert
Konferenzbeitrag
Conference Paper
2019 Applications of SiC Devices
Kranzer, D.; Hensel, A.; Thoma, J.; Armbruster, C.; Hercegfi, P.; Schönberger, S.
Aufsatz in Buch
Book Article
2018 Maßnahmen zur Teillastoptimierung von Ladeelektronik in PV-Heimspeichersystemen
Armbruster, Cornelius; Probst, Leonhard; Gasser, Corentin; Schöner, Christian
Konferenzbeitrag
Conference Paper
2018 PV-Lichtbögen sicher erkennen - der neue Produktstandard IEC 63027
Eger, F.
Poster
2018 Galvanical isolated microinverter with GaN transistors for photovoltaic modules
Hensel, Andreas; Armbruster, Cornelius; Rouffaud, Gilles
Konferenzbeitrag
Conference Paper
2018 PV-Lichtbögen sicher erkennen
Eger, F.
Zeitschriftenaufsatz
Journal Article
2018 Design and Commissioning of a 10 kV Three-Phase Transformerless Inverter with 15 kV Silicon Carbide MOSFETs
Thoma, J.; Volzer, B.; Kranzer, D.; Derix, D.; Hensel, A.
Konferenzbeitrag
Conference Paper
2018 Lichtbögen und elektrische Sicherheit in PV-Heimspeichern
Eger, F.; Laukamp, H.; Bopp, G.
Poster
2017 Highly efficient and compact single phase PV inverter with GaN transistors at 250 kHz switching frequency
Derix, D.; Hensel, A.; Freiche, R.
Konferenzbeitrag
Conference Paper
2017 DC arc fault scenarios and detection methods in battery storage systems
Eger, F.; Bopp, G.; Freiberger, D.; Lang, N.; Laukamp, H.; Rouffaud, G.
Konferenzbeitrag
Conference Paper
2017 Loss-reduced reactive power control strategies for transmission system support with renewable energy sources
Köppe, H.; Engel, B.; Grab, R.; Rogalla, S.
Konferenzbeitrag
Conference Paper
2017 Lichtbögen und elektrische Sicherheit in PV-Heimspeichersystemen
Laukamp, H.; Tschupp, J.
Vortrag
Presentation
2017 Symbiotic operation of wind and PV farms connected to the high voltage grid
Grab, R.; Rogalla, S.
Konferenzbeitrag
Conference Paper
2017 Analyse von Resonanzbildungen zwischen Wechselrichtern und Netz
Rogalla, S.; Ackermann, F.; Moghadam, H.; Stalter, O.
Vortrag
Presentation
2017 Untersuchung verschiedener Topologien zum Aufbau eines höchstintegrierten PV-Modulwechselrichter mit GaN-Transistoren
Hensel, A.; Schöner, C.; Fuller, M.
Konferenzbeitrag
Conference Paper
2017 Large scale investigation of harmonic summation in wind- and PV-power plants
Ackermann, Florian; Moghadam, Hasanali; Rogalla, Sönke; Santjer, Fritz; Athamna, Issam; Klosse, Rainer; Malekian, Kaveh; Adloff, Stephan; Meyer, Marc Florian; Kaatz, Gesa; Schulz, Detlef; Bitz, Alexander; Schaefer, Nils; Fricke, Bjoern; Ghouti, Mohamad El
Konferenzbeitrag
Conference Paper
2017 Comparison of FPGA based control strategies (DDSRF-PI vs. State-Space Control) for grid connected inverters under grid disturbances
Mittwede, E.; Kern, J.; Schönberger, S.; Stickan, B.
Konferenzbeitrag
Conference Paper
2017 Modulation scheme to improve the efficiency for low load operating points for a dual active bridge DC/DC-converter
Khani, M.
Konferenzbeitrag
Conference Paper
2017 Model predictive control of a 3-phase grid-connected B6-inverter with LCL-filter in abc-coordinates
Stickan, Benjamin; Reichert, Stefan; Diehl, Moritz
Konferenzbeitrag
Conference Paper
2016 Dynamische Stabilität von PV-Dieselsystemen
Singer, R.
Konferenzbeitrag
Conference Paper
2016 Microgrids and PV-Diesel Systems
Rogalla, S.
Konferenzbeitrag
Conference Paper
2016 Dynamisches Simulationsmodell für Q(U)-Regler und deren Steuerung durch einen Cluster-Regler im Verteilnetz
Salman, A.; Zacharias, P.; Bihler, N.; Singer, R.; Bader, M.; Rogalla, S.
Konferenzbeitrag
Conference Paper
2016 Symbiotic Operation of Large Photovoltaic and Wind Power Plants
Grab, R.; Ackermann, F.; Rogalla, S.
Konferenzbeitrag
Conference Paper
2016 Investigation of 3-level-topology MNPC for aerospace applications with SiC-MOSFET-based power modules
Schöner, C.; Hensel, A.; Zambrano Cambero, J.C.
Konferenzbeitrag
Conference Paper
2016 Small-disturbance voltage stability of OLTC & decentralized reactive power dropp control
Dallmer-Zerbe, K.; Berardo, D.; Salman, A.; Wille-Haussmann, B.
Konferenzbeitrag
Conference Paper
2016 Central inverters and PV power plant concepts
Rogalla, S.
Konferenzbeitrag
Conference Paper
2016 Übersicht: PV-Diesel-Systeme
Rogalla, S.
Konferenzbeitrag
Conference Paper
2016 Characterization of Harmonic Emission of Individual Wind Turbines and PV Inverters Based on Measurements. Pt.I: Photovoltaic Inverters
Ackermann, F.; Moghadam, H.; Meyer, J.; Mueller, S.; Domagk, M.; Santjer, F.; Athamna, I.; Klosse, R.; Kuech, K.
Konferenzbeitrag
Conference Paper
2016 Source-driven and resonance-driven harmonic interaction between PV inverters and the grid
Rogalla, S.; Ackermann, F.; Bihler, N.; Moghadam, H.; Stalter, O.
Konferenzbeitrag
Conference Paper
2016 A novel control algorithm for grid-connected inverters improving power quality using voltage control and virtual impedance
Reichert, S.; Stickan, B.
Konferenzbeitrag
Conference Paper
2016 Large-disturbance voltage stability of SG applying FGW TR4-models in distribution grids
Salman, A.; Dallmer-Zerbe, K.; Singer, R.; Strasser, K.; Rogalla, S.
Konferenzbeitrag
Conference Paper
2016 Stability analysis of droop-control in diesel-hybrid systems
Reichert, S.; Singer, R.
Konferenzbeitrag
Conference Paper
2016 Grid codes for PV inverters
Rogalla, S.
Konferenzbeitrag
Conference Paper
2015 Towards a Better Understanding of Harmonics and Power Electronics
Rogalla, S.; Ackermann, F.; Bihler, N.; Dötter, G.; Singer, R.; Wolf, E.
Zeitschriftenaufsatz
Journal Article
2014 Schwierige Bewertung von Oberschwingungsemissionen - Herausforderungen bei der OS-Vermessung von großen Erzeugern am realen Netz
Rogalla, S.; Ackermann, F.; Doetter, G.; Santjer, F.; Singer, R.
Konferenzbeitrag
Conference Paper
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