**Author details**

Dariusz Wiśniewski<sup>1</sup> , Mariusz Siudak<sup>2</sup> \* and Janusz Piechocki<sup>1</sup>

\*Address all correspondence to: siudak.mariusz@gmail.com

1 Faculty of Technical Sciences, Department of Electric and Power Engineering, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland

2 Faculty of Technical Sciences, Department of Systems Engineering, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
