M. Danikas
Department of Electrical & Computer Engineering, Democritus University of Thrace, Greece

Democritus University of Thrace, Dpt of Electrical and Computer Engineering, Power Systems Laboratory, 67100 Xanthi, Greece

S. Morsalin
University of New South Wales, School of Electrical Engineering and Telecommunications, Sydney, Australia

University of New South Wales, School of Electrical Engineering and Telecommunications, Sydney, NSW 2052, Australia