1. State Grid Shanghai Electrical Power Research Institute, Shanghai 200437, China
2. State Grid Ningxia Electrical Power Research Institute, Yinchuan 750001, China
3. MOE Key Laboratory of Micro/Nano Systems for Aerospace, Northwestern Polytechnical University, Xi’an 710072, China
4. MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China