1. Fredrich-Alexander University of Erlangen-Nürnberg, School of Advanced Optical Technologies, Paul-Gordan-Street 6, Erlangen 91054, GermanybFredrich-Alexander University of Erlangen-Nürnberg, Chair of System Simulation, Cauer Street 11, Erlangen 91054, Ger
2. University of Oldenburg, NEXT ENERGY EWE Research Centre for Energy Technology, Carl-von-Ossietzky-Street 15, 26129 Oldenburg, Germany