[1] Dalian Univ Technol, Inst Electrostat & Special Power, Dalian 116024, Peoples R China
[2] Minist Educ Peoples Republ China, Key Lab Ind Ecol & Environm Engn, Dalian 116024, Peoples R China
[3] Shandong Elect Power Res Inst, Jinan 250002, Peoples R China