Power Quality / Supply reliability

As well as other products, „electricity“ has to fulfil certain quality criteria. A degradation of power quality can be a consequence of network disturbances caused by customer installations (harmonics from power electronics, voltage fluctuations from fluctuating loads). Faults (short circuits) in the transmission or distribution grid lead to voltage dips or interruptions (reliability). Research activities of the Institute for Electrical Power Systems include amongst others the measurement and simulation of power quality phenomena. This is for instance the calculation of harmonic grid impedance, the transfer of disturbances through the grid and probabilistic reliability analysis.
A further key aspect is the calculation and evaluation of ohmic, inductive and capacitive interference.

Research fields:
The grid structures and the operation of electricity grids are subject to unprecedented changes ...
Frequency stability in future grids

Currents with frequencies near 0 Hz, i.e. quasi DC, are undesirable in the high-voltage ...
Low Frequency Neutral Point Currents (GIC)

Voltage Dips                                                        
Harmonic impedance                                                        
Contact Information

Graz University of Technology
Institute of Electrical Power Systems

Inffeldgasse 18/I
8010 Graz

+43 316 873-7551