1 | Gdańsk University of Technology, Faculty of Electrical and Control Engineering, ul. Narutowicza 11/12, 80-233 Gdańsk, Poland |
2 | Energa-Operator SA, ul. Marynarki Polskiej 130, 80-557 Gdańsk, Poland |
3 | University of Žilina, Faculty of Management Science and Informatics, Univerzitná 8215/1, 010 26 Žilina, Slovakia |