Review and application of diagnosis methods for 22.9kV-y distribution systems

Author

Oh-myeon Kwon ; Byoun-hun Jung ; Jong-Man Joung ; Dong-Myung Kim

Author_Institution

Facility Diagnosis Center of Korea Electr. Power Cooperation (KEPCO), Daejeon, South Korea

fYear

2012

fDate

23-27 Sept. 2012

Firstpage

802

Lastpage

804

Abstract

Maintenance method for 22.9kV-y distribution systems of KEPCO was improved from time base maintenance to condition base maintenance with adopting various diagnosis instruments. The typical diagnosis methods are IR(infrared) thermo graph, ultra sonic detection, VLF(very low frequency) test, TEV(transient earth voltage) detection. Diagnosis experience was presented and the results of defects analysis were also discussed. Firstly IR camera is useful to find out the insulation that has leakage current like cracked porcelain suspension insulators. Ultra sonic detector is good to locate where the surface tracking is taking place like contaminated polymeric insulators. Lastly TEV detection is helpful to diagnosis enclosed facilities such as switchgear and transformers.

Keywords

distribution networks; infrared imaging; insulator testing; leakage currents; polymer insulators; porcelain insulators; IR camera; KEPCO; condition base maintenance; contaminated polymeric insulators; cracked porcelain suspension insulators; defects analysis; diagnosis instruments; diagnosis methods; distribution systems; infrared thermo graph; leakage current; surface tracking; switchgear; time base maintenance; transformers; transient earth voltage detection; ultra sonic detection; ultra sonic detector; very low frequency test; voltage 22.9 kV; Condition monitoring; Conferences; Infrared; TEV; Ultrasonic; diagnosis methods; distribution systems; transformers;

fLanguage

English

Publisher

ieee

Conference_Titel

Condition Monitoring and Diagnosis (CMD), 2012 International Conference on

Conference_Location

Bali

Print_ISBN

978-1-4673-1019-2

Type

conf

DOI

10.1109/CMD.2012.6416269

Filename

6416269