Authors
Maksims Feofilovs
Institute of Energy Systems and Environment, Faculty of Electrical and Environmental Engineering, Riga Technical University, Riga, Latvia
Kriss Spalvins
Institute of Energy Systems and Environment, Faculty of Electrical and Environmental Engineering, Riga Technical University, Riga, Latvia
Karlis Valters
Institute of Energy Systems and Environment, Faculty of Electrical and Environmental Engineering, Riga Technical University, Riga, Latvia