Title :
Online detecting insulator corona for diagnosing faulty insulators on transmission line
Author :
Cheng, Y.C. ; Ding, Lijian ; Li, C.R. ; Ma, X.H.
Author_Institution :
North China Electr. Power Univ., Beijing, China
Abstract :
This paper describes some methods of differentiating insulator corona pulses from the current pulse signals on the grounded line of the tower, which could be used to identify faulty insulators on transmission lines. The pattern of noise and the insulator corona have been analyzed. A high frequency sensor with a filter is used to eliminate periodic noise, such as leakage current, harmonics and carriers. A pattern identification method of distinguishing the insulator corona pulse from the current pulse has been put forward, which is based on the pulse statistical characteristics. The field experimental results show that these methods are effective and useful
Keywords :
corona; insulator testing; leakage currents; noise; pattern recognition; poles and towers; power overhead lines; carrier; current pulses; faulty insulators; filter; grounded line; harmonics; high frequency sensor; high-voltage transmission lines; insulator corona; insulator corona pulses; leakage current; noise; periodic noise; pulse statistical characteristics; tower; transmission line; Corona; Fault detection; Fault diagnosis; Frequency; Insulation; Pattern analysis; Poles and towers; Sensor phenomena and characterization; Signal processing; Transmission lines;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2001 Annual Report. Conference on
Conference_Location :
Kitchener, Ont.
Print_ISBN :
0-7803-7053-8
DOI :
10.1109/CEIDP.2001.963541
