70 kVA PV inverter with innovative cooling concept

Matching power electronics is a central component for the processing and distribution of electrical energy from renewable energy sources.

Power Converter Systems

In the topic of Power Converter Systems, our fields of work include:

 

Power Electronics for PV and Storage Systems

 

Power Electronics for Electric Mobility

In many parts of the world, the electricity production costs of renewable energies and in particular photovoltaics (PV) are now clearly competitive. Energy storage systems are also proving to be very cost effective, which is why an ever broader use of sustainable energies is to be expected. Suitable power electronic systems are central components, both for processing electrical energy and for system integration into an increasingly complex and intelligent energy system. Thanks to innovative hardware designs, optimized cooling systems and specific control technology, we can develop such converter systems in almost all performance classes. These can be upgraded for grid-connected, off-grid and hybrid applications.

In the wake of the energy revolution, the decarbonization of the transport sector is increasingly being realized through the electrification of the powertrain. In order to make the electrical energy available to the electric drive in an application-specific and correct form, a large number of power electronic converters are required. For this purpose we develop application-specific solutions such as highly efficient bidirectional charging systems. These enable the vehicles to be charged efficiently and the stored energy to be fed back in the power grid if needed. The integration of grid-supporting and grid-building functions is also part of our research focus. In addition, we develop highly compact on-board converters which, for example, efficiently and intelligently couple the traction battery to the actuators.

 

Selected Research Projects

 

EDGE

Increasing the Overall Efficiency of Self-Consumption Systems

 

DyConPV

Highly Dynamic Control of Photovoltaic Inverters

 

HiPoInd

High Power Inductive – Automated, Wireless Fast-Charging Technology for Autonomous Mobile Robots and Industrial Trucks

 

LUIZ

Power Electronics – Intelligent and Reliable

Stephan Liese

Contact Press / Media

Stephan Liese

Power Converter Systems

Fraunhofer ISE
Heidenhofstr. 2
79110 Freiburg

Phone +49 761 4588-5890

Publications

 

YearTitle/AuthorDocument Type
2021Universelle Umrichterregelung für ein- und dreiphasige Systeme im Netzparallel- und Inselnetz-Betrieb
Siedle, C.; Reichert, S.; Stickan, B.; Rauscher, M.
Conference Paper
2020Analysis and Design of a Novel Six-Switch Five-Level Active Boost Neutral Point Clamped Inverter
Siwakoti, Y.P.; Palanisamy, A.; Mahajan, A.; Liese, S.; Long, T.; Blaabjerg, F.
Journal Article
2019Bidirectional inductive charging systems economical in the electricity grid: Development and application of a technology to boost electric mobility
Schumann, P.; Borrmann, D.; Mahajan, A.; Mittelsdorf, M.; Schember, T.
Conference Paper
2019A Novel Seven-Level Active Neutral-Point-Clamped Converter With Reduced Active Switching Devices and DC-Link Voltage
Siwakoti, Y.P.; Mahajan, A.; Rogers, D.J.; Blaabjerg, F.
Journal Article
2019Spectrum Shaping Methods for Predictive Control Approaches Applied to a Grid-Connected Power Electronics Converter
Stickan, B.; Rutquist, P.; Geyer, T.; Diehl, M.
Conference Paper
2018Dimensioning and comparison of circular and double D coil geometries for inductive charging of electric vehicles
Mahajan, A.; Reichert, S.; Nehlert, F.
Conference Paper
2018A New Seven-Level Active Boost Neutral Point Clamped (7L-ABNPC) Inverter
Siwakoti, Y.P.; Liese, S.; Mahajan, A.; Palanisamy, A.; Rogers, D.; Blaabjerg, F.
Conference Paper
2018A New Three-Level Three-Phase Boost PWM Inverter for PV Applications
Palanisamy, A.; Mahajaran, A.; Liese, S.; Siwakoti, Y.; Long, T.; Forati Kashani, O.; Blaabjerg, F.
Conference Paper
2018Which digital energy services improve energy efficiency?: A multi-criteria investigation with European experts
Goldbach, K.; Rotaru, A.M.; Reichert, S.; Stiff, G.; Gölz, S.
Journal Article
2017A 70 kW next generation three-phase solar inverter with multiple MPPTs using advanced cooling concept and stacked-PCB architecture
Freiche, R.; Franz, S.; Fink, M.; Liese, S.
Conference Paper
2017Comparison between grid-feeding and grid-supporting inverters regarding power quality
Reichert, S.; Griepentrog, G.; Stickan, B.
Conference Paper
2017Comparison 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.
Conference Paper
2017Highly efficient and compact single phase PV inverter with GaN transistors at 250 kHz switching frequency
Derix, D.; Hensel, A.; Freiche, R.
Conference Paper
2017Improved AC-current control based on state space control applied to solar string inverters
Rapp, T.; Liese, S.; Siedle, C.; Brand, M.; Rossa, A.J.
Conference Paper
2017Machine code functions in BIM for cost-effective high-quality buildings
Maurer, C.; Sprenger, W.; Franz, S.; Lodewijks, J.; Rüppel, U.; Kuhn, T.
Conference Paper
2017Machine-code functions in BIM for cost-effective high-quality buildings
Maurer, C.; Sprenger, W.; Franz, S.; Boudhaim, M.; Lodewijks, J.; Rüppel, U.; Kuhn, T.E.
Journal Article
2017Modulation scheme to improve the efficiency for low load operating points for a dual active bridge DC/DC-converter
Khani, M.
Conference Paper
2016DC/DC-converter for modular coupling of 48 V battery packs to a high voltage DC bus
Eberlin, M.; Khani, M.
Conference Paper
2016Design and development of LLC DC/DC converter for fuel cell range extender application
Mahajan, A.; Reichert, S.
Conference Paper
2016A novel control algorithm for grid-connected inverters improving power quality using voltage control and virtual impedance
Reichert, S.; Stickan, B.
Conference Paper
2016Stability analysis of droop-control in diesel-hybrid systems
Reichert, S.; Singer, R.
Conference Paper
2015Comparison of continuous and transition mode in a PV-booster with GaN-transistors and switching frequencies up to 250 kHz
Derix, D.; Freiche, R.; Schöner, C.; Hensel, A.
Conference Paper
2015Comparison of different control strategies for series-series compensated inductive power transmission systems
Tritschler, J.; Goeldi, B.; Reichert, S.; Griepentrog, G.
Conference Paper
2015Measurement results of a 22 kW bidirectional inductive charger
Goeldi, B.; Tritschler, J.; Reichert, S.
Conference Paper
2015Zukunftsfähige Systemtechnik für PV-Großkraftwerke mit erhöhtem Spannungsniveau
Liese, S.; Rogalla, S.; Schönberger, S.; Venkatapathi, R.
Conference Paper
2014Hoch effiziente induktive und konduktive Ladesysteme für die Elektromobilität durch den Einsatz von SiC Halbleitern: Vortrag gehalten auf dem 3. Symposium Elektromobilität 2014, Ostfildern/Stuttgart, Germany, 20.05.2014
Reichert, S.; Tritschler, J.; Goeldi, B.
Presentation
2014Innovative state-space controller for an optimized low-voltage-ride-through behaviour
Eberlin, M.; Siedle, C.; Reichert, S.
Conference Paper
2014Neue Reglerstruktur für Netz- und Inselwechselrichter
Abbassi, N.; Reichert, S.
Conference Paper
2014Novel control structure for grid connected and islanding inverters
Abbassi, N.; Reichert, S.
Conference Paper
2014Power Electronics for Utility Scale PV Power Plants with Voltages Up to +/- 1500 VDC
Görden, T.; Liese, S.; Rogalla, S.; Venkatapath, R.
Conference Paper
2014A practical investigation of a high power, bidirectional charging system for electric vehicles
Tritschler, J.; Reichert, S.; Goeldi, B.
Conference Paper
2014System technology for the next generation village energy supply
Eberlin, M.; Reiners, F.; Stalter, O.; Franz, S.
Conference Paper
2014Verhalten eines dreiphasigen Dreipunkt-Wechselrichters mit Netzstrom-Zustandsregler bei dynamischen Einbrüchen der Netzspannung
Eberlin, M.; Reiners, F.; Siedle, C.; Stalter, O.
Conference Paper
2013Design and dimensioning of a highly efficient 22 kW bidirectional inductive charger for E-mobility
Goeldi, B.; Reichert, S.; Tritschler, J.
Conference Paper
2013Hocheffiziente, brührungslose und bidirektionale Energieübertragung für die Elektromobilität
Tritschler, J.; Reichert, S.; Goeldi, B.
Conference Paper
2013Innovative Leistungselektronik für photovoltaische Inselsysteme mit hybrider Blei-Lithium Batterie
Eberlin, M.; Reiners, F.; Stalter, O.
Conference Paper
2013Lichtbogendetektion in PV-Anlagen
Grab, R.; Häberlin, H.; Schmitz, R.; Philipp, S.; Schmidt, H.; Franz, S.; Laukamp, H.; Bopp, G.; Reil, F.
Conference Paper
2013Untersuchung des LVRT-Verhaltens parallelbetriebener PV-Zentralwechselrichter
Doetter, G.; Rogalla, S.; Bihler, N.; Siedle, C.; Burger, B.; Schaupp, T.; Kempen, S.; Garber, T.; Landwehr, F.; Lotzkat, W.; Ackermann, R.
Conference Paper
This publication list has been generated from the publication database Fraunhofer-Publica.