Liu Jian, chief engineer of Shaanxi Electric Power Research Institute of State Grid, a leading figure in the fields of distribution automation, distribution network planning and distribution network relay protection in China, is an adjunct professor at Polytechnic University. Mr. Yu Jianming is a discipline leader in the direction of power system in the former Institute of Automation. Editor-in-chief of the domestic classic textbook "Power Supply Technology", the main research direction is power quality and power system planning. Mr. Tong is the first-class discipline leader of electrical engineering, and his research direction is reactive power compensation and harmonic suppression microgrid, that is, the application of power electronics technology in power system. Duan Jiandong, Dr. Zhang Baohui, teacher of Jiaotong University. He studies relay protection and now focuses on smart grid and new energy. However, Mr. Yu Jianming has retired and does not recruit graduate students.