1. Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology (Ministry of Education), Jilin City, Jilin, China
2. College of Instrumentation and Electrical Engineering, Jilin University, Changchun, Jilin, China
3. China Huanqiu Contracting and Engineering Company Ltd., Beijing, China
4. School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou, Guangdong, China