Prof. Dr. Holger Hirsch | Power Transmission and Storage
Professor Hirsch is the Head of the Institute for Power Transmission and Storage of the University of Duisburg-Essen. The integration of information technology and electric power systems in urban areas is one field on which the research conducted by professor Hirsch. He was awarded the IEC 1906 Award 2006 and has published significant works on topics like "EMC Optimization of a Converter Power Stage by Reduction of Surface Currents", "Powerline Communications" and "Optimum Grounding Grid Design by Using an Evolutionary Algorithm".
The Chair offers courses for diploma, bachelor and master studies like fundamentals of electrical energy technology, high voltage engineering, electromagnetic compatibility, devices for power transmission, technology of electric and magnetic highly stressed equipments and so on. There are also laboratories offered by the chair like laboratory to high voltage engineering and others.
The Chair of Power Transmission and Storage professionally deals with a wide spectrum not only with classical energy technology but also with neighbouring disciplines such as communications technology. One focus is the power line communication (PLC) which transfers information through power supply lines. This concern the aspects of electromagnetic compatibility (EMV) in particular, as the influence of the communication by transient emissions and consumers connected with supply network system in focus. The work of the Chair is owed to the EMV of PLC modems because today a huge number of PLC products are available on the market. Together with a British colleague, Prof. Hirsch was invited by the European Committee to explain the EMV aspects for PLC for the competent authorities of the single member states which regulate in the area of the telecommunications in 2003.
The EMV is not only important for communication system but also for energy transmission systems. Moreover, in the vehicle area, where the consequences of unwanted influences are very dangerous, EMV is taken seriously as well. The Chair does significant work in this field. Through active participation in the MC standardization, Prof. Hirsch’s expert opinion is obtained by vehicle manufacturers and suppliers.
More and more modern technologies have entered classical energy technology. Even in supposedly simple equipments like open wire cable and its operational management, huge development potential still exists. Thus, an autarkic working temperature measurement system that permits a stronger and, above all, safer utilization will be developed by the Chair. With precise knowledge of the temperature the full potential lying within energy routes can be made use of. In cooperation with the industry the developed lab pattern will be advanced to a system suited for industry.
The high-voltage laboratory of the Chair for Power Transmission and Storage has been accredited as a testing laboratory by DATech and in accordance with ISO 17025. The University of Duisburg-Essen is thus one of three universities in Germany with a facility of this kind. The installed load, in particular, permits the performance of high-voltage and high-current experiments involving even longer cable lines.
Selected recent research projects have been:
- Ultra Wide Band Technology for Power Line Communications
- EMV of Power Line Communications
- PLC for Energy-Service
- EMC Modelling
- Ground Design
- Temperature sensors for high-voltage Power Lines
- New energy transmission technologies, as bipolar cable systems
- Design of bulk power cable systems
- Modelling of electromagnetic and thermal fields in high voltage applications
- Modelling of transient over-voltages
The Chair cooperated closely with companies like EMC Test NRW GmbH, Power Plus Communications AG, NKT cables GmbH, Schniewindt GmbH and others.