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

Volume

11

Issue

2

fYear

1996

fDate

4/1/1996 12:00:00 AM

Firstpage

909

Lastpage

916

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;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.489351

Filename

489351