Power Electronics for Photovoltaics

9:10 Power Electronics for Photovoltaics – Review
Market Data, PV Electricity Production
Prof. Dr. Bruno Burger, Head of Group Advanced Devices and Technologies, Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany

9:30 New Power Semiconductors
SiC and GaN Power Transistors and Diodes, Gate Drivers, Applications and Challenges of the new Technologies
Dipl.-Ing. Andreas Hensel, Head of Team Advanced Devices and High-Efficiency Converters , Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany

10:45 Power Inductors
Electrical Properties of Chokes, Losses, Parasitic Properties, Core Materials and their Properties, Shapes, Design Procedures, Winding Types, Thermal Design and Simulation
Prof. Dr. Alexander Stadler, Coburg University, Coburg, Germany

11:30 Module Integrated Electronics
Active Bypass Diodes, DC/DC-Converters, Micro Inverters, Comparison of Central, String and Micro Inverter Concept
Prof. Dr. Bruno Burger, Head of Group Advanced Devices and Technologies, Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany

13:45 Single Phase String Inverters
Basic Requirements, Circuits, Efficiency, Development Trends
Dr. Olivier Stalter, Head of Department Power Electronics, Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany

15:45 Three Phase String Inverters
Basic Requirements, Circuits, Efficiency, Development Trends
Dr. Olivier Stalter, Head of Department Power Electronics, Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany

17:00 Electromagnetic Compatibility
European and CEC Efficiency, Electromagnetic Sources of Interference, Filter Components, Measurement
Dr. Heribert Schmidt, Senior Scientist and Fellow, Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany

17:45 End of First Day

19:30 Joint Dinner with the Possibility to Discuss and to Exchange Experiences at Hotel Prinzregent an der Messe, Riemer Straße 350, Munich (self pay)

Tuesday, June 21st, 2016

8:30 Central Inverters and PV Power Plant Concepts
Basic Requirements, Circuits, Efficiency, Reliability, Cooling, Power Plant Concepts, Development Trends, System Design of PV Power Plants
Dipl.-Ing. Sönke Rogalla, Head of Group Sustainable Grids and Power Plants, Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany

9:30 Battery Chargers and Off-Grid Inverters
Battery Charge Regulators: Series, Shunt and MPP-Regulators, Circuits, Trends; Off-Grid- Inverters: Requirements, Circuits, Efficiency
Prof. Dr. Bruno Burger, Head of Group Advanced Devices and Technologies, Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany

10:45 Grid-connected Battery Systems
Residential battery systems for PV self-consumption, central battery systems for grid support, delivery of active and reactive power, compensation of harmonics
Dr. Olivier Stalter, Head of Department Power Electronics, Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany

11:30 Feedback Control Systems for Power Electronics
Modelling of Controlled Systems, Controller Types, Cascaded Control, State Control, Dimensioning of Controller Parameters, Control of DC/DC converters and DC/AC inverters, different types of PLLs
Dr. Christoph Siedle, Team Modelling and Control of Converter Systems, Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany
Corentin Gasser, Team Advanced Devices and High-Efficiency Converters, Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany

14:00 Microgrids and PV-Diesel Systems
Definition of microgrids; control modes for microgrids; droop control for active and reactive power; hybrid systems; voltage and frequency control of diesel generators; development trends
Dipl.-Ing. Sönke Rogalla, Head of Group Sustainable Grids and Power Plants, Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany

14:45 Grid Codes for PV Inverters
International Requirements, Low Voltage Ride Through (LVRT), Inverter Efficiency, Harmonics, Measurement Results, Field Experience
Dipl.-Ing. Sönke Rogalla, Head of Group Sustainable Grids and Power Plants, Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany

16:00 Interactions between Modules and Inverters
Surface polarization effect in high efficiency solar cells; degradation of Thin Film modules; DC voltage to ground of different inverter types; which inverter for which module type?
Dr. Heribert Schmidt, Senior Scientist and Fellow, Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany

16:30 PV System Technology
IV-Curves, MPP and DC voltage range, temperature behaviour, MPP-Tracking, ratio PV power to Inverter power, losses due to PV oversizing, power limitation to 70%
Prof. Dr. Bruno Burger, Head of Group Advanced Devices and Technologies, Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany

17:00 Circuits for fit safety
Methods and circuits for arc-fault detection; ground-fault protection; circuits for disconnection of modules and strings; rapid system shutdown; safety requirements
Dr. Heribert Schmidt, Senior Scientist and Fellow, Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany
Felix Eger, Group Sustainable Grids and Power Plants, Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany

17:30 Final Discussion

18:00 End of the Seminar