1. School of Building Environment Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, PR China
2. Zhengzhou Key Laboratory of Electric Power Fire Safety, Zhengzhou University of Light Industry, Zhengzhou 450001, PR China
3. School of Electrical Information Engineering, Henan University of Engineering, Zhengzhou 451191, PR China
4. State Grid Henan Electric Power Ultra High Voltage Company, Zhengzhou 450000, PR China