[1] North China Elect Power Univ, Engn Res Ctr Intelligent Comp Complex Energy Syst, Minist Educ, Baoding 071003, Hebei, Peoples R China
[2] Zhejiang Elect Power Co Res Inst, Dept Sci & Technol Informat, Hangzhou 310014, Zhejiang, Peoples R China
[3] North China Elect Power Univ, Dept Math & Phys, Baoding 071003, Hebei, Peoples R China