[1] Harbin Inst Technol Shenzhen, Sch Mech Engn & Automat, Shenzhen 518055, Peoples R China
[2] Univ Southern Denmark, Mads Clausen Inst, Dept Elect Engn, DK-5230 Odense, Denmark
[3] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore
[4] Cent South Univ, Sch Automat, Changsha 410083, Peoples R China
[5] Aalborg Univ, Dept Energy Technol, DK-9220 Aalborg, Denmark