[1] South China Univ Technol, Sch Comp Sci & Engn, Guangdong Prov Key Lab Computat Intelligence & Cy, Guangzhou 510006, Peoples R China
[2] Guangdong Univ Technol, Sch Automat, Dept Elect Engn, Guangzhou 510006, Peoples R China
[3] Brunel Univ London, Brunel Interdisciplinary Power Syst Res Ctr, London UB8 3PH, England