1. System Analysis and DC Technology Research Institute Electric Power Research Institute of Yunnan Power Grid Co. Ltd,Kunming,China
2. State Key Laboratory of HVDC, EPRI, CSG,Power system simulation and control technology department,Guangzhou,China
3. National Energy Power Grid Technology R&D Centre,Power system simulation and control technology department,Guangzhou,China
4. CSG Key Laboratory for Power System Simulation,Power system simulation and control technology department,Guangzhou,China