1. Electric Power Intelligent Sensing Technology and Application State Grid Corporation Joint Laboratory, Future Science Park, Changping District, 102209 Beijing, P. R. China
2. Department of Electric Power Sensing Technology, Global Energy Interconnection Research Institute co., Ltd., Future Science Park, Changping District, 102209 Beijing, P. R. China
3. Foshan (Southern China) Institute for New Materials, Nanhai District, 528200 Foshan, P. R. China
4. Center of Advanced Ceramic Materials and Devices, Yangtze Delta Region Institute of Tsinghua University, 314006 Zhejiang, P. R. China