Study of Corona Discharge Pattern on High Voltage Transmission Lines for Inspecting Faulty Porcelain Insulators

The corona pattern from porcelain insulator strings on high voltage (HV) transmission lines has been investigated for inspecting faulty insulators on-line. Corona patterns from HV conductive line, metal accessory, and discharge patterns from bad connection, power stations, have also been studied for...

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Bibliographic Details
Published inIEEE transactions on power delivery Vol. 23; no. 2; pp. 945 - 952
Main Authors Yangchun Cheng, Yangchun Cheng, Chengrong Li, Chengrong Li, Xingquan Huang, Xingquan Huang
Format Journal Article
LanguageEnglish
Published New York, NY IEEE 01.04.2008
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Applied sciences
Background noise
China
Corona
Coronas
detection
Electric power plants
Electrical engineering. Electrical power engineering
Electrical power engineering
Exact sciences and technology
faulty insulators
Frequency
Harmonics
High voltages
high-voltage techniques
inspection
Insulation
Insulators
Miscellaneous
noise
partial discharges
Pattern recognition
Porcelain
porcelain insulators
Power generation
Power networks and lines
Power transmission lines
pulse measurements
Testing. Reliability. Quality control
Transmission lines
Users connections and in door installation
Various equipment and components
Voltage
Asia
China
Electric power plant
Electric energy transportation
Noise reduction
pulse measurements
Frequency measurement
Electric utility
Transmission line
noise
faulty insulators
Corona
partial discharges
Corona effect
Pulse measurement
inspection
detection
Partial discharge
Porcelain insulators
Instruments
Dielectric materials
Discharge pattern
Connection
Pattern recognition
transmission lines
Pulse noise
High-voltage techniques
insulators
High frequency
High voltage line
Power transmission line
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Summary:The corona pattern from porcelain insulator strings on high voltage (HV) transmission lines has been investigated for inspecting faulty insulators on-line. Corona patterns from HV conductive line, metal accessory, and discharge patterns from bad connection, power stations, have also been studied for background pulse noise elimination. A pattern recognition method for inspecting faulty porcelain insulators is proposed, which consists of several criteria. It is found that the harmonics and carriers from the transmission lines influence the recognition seriously, which can be eliminated by choosing a high frequency band of sensors (2 MHz-20 MHz). Based on the above investigations, an instrument was developed and used on the field measurements in Lanzhou and Zhengzhou power utilities in China. The field results show a strong support for this method. On the measurement of 76 towers, the measuring accuracy of inspecting faulty insulators was about 87.5%.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2007.905551