Title :
Diagnostic techniques and apparatus for detecting faults in perfluorocarbon liquid immersed transformers
Author :
Mizuno, K. ; Ogawa, A. ; Ooe, E. ; Mori, E.
Author_Institution :
Chubu Electr. Power Co. Inc., Nagoya, Japan
fDate :
4/1/1996 12:00:00 AM
Abstract :
This paper deals with techniques and an apparatus designed to diagnosis transformer faults by detecting C2F4, C 2F6 and C3F6 gases contained in perfluorocarbon (PFC) liquid. The authors first established fault diagnostic techniques that employ gas patterns, gas composition ratios and fault diagnostic diagram and flow chart, based on the C2F 4, C2F6 and C3F6 gases generated by overheating, partial discharges and arc discharges. Then, the authors verified the possibility of diagnosing internal faults in PFC liquid-immersed transformers when internal fault simulation tests on transformer model are conducted. The C2F4 and C 3F6 gases generated there are detected with the gas diagnostic apparatus equipped with a gas sensor
Keywords :
arcs (electric); chemical analysis; chemical variables measurement; fault diagnosis; fault location; partial discharges; power transformer insulation; transformer oil; C2F4; C2F6; C3F6; arc discharges; fault diagnostic diagram; flow chart; gas composition ratios; gas patterns; gas sensor; internal fault simulation tests; partial discharges; perfluorocarbon liquid immersed transformers; transformer faults diagnosis; Analytical models; Arc discharges; Cities and towns; Electrical fault detection; Fault detection; Fault diagnosis; Flowcharts; Gas detectors; Gases; Glass; Insulator testing; Partial discharges; Petroleum; Testing; Transformers;
Journal_Title :
Power Delivery, IEEE Transactions on
