Title :
Noises elimination for online detecting faulty insulator
Author :
Cheng, Y.C. ; Li, C.R. ; Ding, Lijian ; Wang, Jingchun ; Wang, Wei
Author_Institution :
North China Electr. Power Univ., Beijing, China
Abstract :
According to researches, insulator corona pulses through the ground line of the tower could be used to identify faulty insulators on transmission lines. But there are many noises in ground lines in field, which make it impossible to detect insulator corona pulses. Some methods of separating insulator corona pulses from these noises are described in this paper. A high frequency sensor with a filter is used to eliminate periodic noises, such as leakage current, harmonic and carrier. A pattern identification based on pulse statistic characteristics is used to remove pulse noises, such as HV line corona and line clip corona
Keywords :
corona; fault location; insulator testing; interference (signal); interference suppression; pattern recognition; porcelain insulators; power overhead lines; signal processing; HV line corona; faulty insulators identification; ground line; high frequency sensor; insulator corona pulses; insulator corona pulses detection; leakage current; line clip corona; noises elimination; pattern identification; periodic noises elimination; porcelain insulators; pulse statistic characteristics; tower; Corona; Fault detection; Fault diagnosis; Filters; Frequency; Insulation; Leakage current; Poles and towers; Sensor phenomena and characterization; Transmission lines;
Conference_Titel :
Electrical Insulating Materials, 2001. (ISEIM 2001). Proceedings of 2001 International Symposium on
Conference_Location :
Himeji
Print_ISBN :
4-88686-053-2
DOI :
10.1109/ISEIM.2001.973661
