Title :
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
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;
Conference_Titel :
Condition Monitoring and Diagnosis (CMD), 2012 International Conference on
Conference_Location :
Bali
Print_ISBN :
978-1-4673-1019-2
DOI :
10.1109/CMD.2012.6416269
