1. School of Electrical Engineering, Shandong University, Jinan, Shandong Province, China, 250014 (e-mail: wmj_sdu@163.com)
2. School of Electrical Engineering, Shandong University, Jinan, Shandong Province, China, 250061 (e-mail: zhanghx@sdu.edu.cn)
3. Electrical Engineering, Shandong University, the Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education, Jinan, China, 250061 (e-mail: shifang@sdu.edu.cn)
4. State Grid Corporation of China, 154576 Beijing, China, 100031 (e-mail: weijiang-chen@sgcc.com.cn)
5. School of Electrical and Electronic Engineering, The University of Manchester, Manchester, United Kingdom of Great Britain and Northern Ireland, M13 9PL (e-mail: vladimir.terzija@manchester.ac.uk)