1. OMICRON electronics GmbH Graz University of Technology,Klaus/Graz,Austria
2. Inst. of Fundamentals and Theory in Electrical Engineering Graz University of Technology,Graz,Austria
3. Inst. of High Voltage Equipment and Grids, Digitalization and Energy Economics RWTH Aachen,Aachen,Germany
4. OMICRON electronics GmbH,Klaus,Austria
5. Inst. of Electrical Power Systems Graz University of Technology,Graz,Austria