A computerized diagnostic technique applicable to HV impulse testing of transformers

Journal Article · Sun Apr 01 04:00:00 EDT 1990 · IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (USA)

DOI:https://doi.org/10.1109/61.53114· OSTI ID:6737405

Stuffle, L R; Stuffle, R E ^[1]

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1. Idaho State Univ., Pocatello, ID (USA). Coll. of Engineering

This paper describes a new method for computer-controlled impulse testing and evaluation of transformer windings. Companion software is also described. The method is based on the use of a high resolution digitizer which supplants the need for visual interpretation of impulse test oscillograms. Availability of the digitized waveforms permits rapid automated comparison of the impulse response and its frequency domain characteristics with ideal references, the latter through the use of the Fast Fourier Transform (FFT). Preliminary results indicate that faults involving a single turn can easily be detected via this method in several ways - from the real or imaginary part of the FFT of the current waveform, from the magnitude of the FFT, or from the phase angle of the FFT. However, the phase angle appears to be the clearest indicator of the group. The method also appears to permit pinpointing the location of the fault within the transformer winding.

• OSTI ID: 6737405
• Journal Information: IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (USA), Journal Name: IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (USA) Vol. 5:2; ISSN 0885-8977; ISSN ITPDE
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
240100* -- Power Systems-- (1990-)
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
COMPUTER CALCULATIONS
COMPUTER CODES
COMPUTERS
DC SYSTEMS
ELECTRICAL EQUIPMENT
ELECTRICAL FAULTS
ENERGY SYSTEMS
EQUIPMENT
FOURIER TRANSFORMATION
HVDC SYSTEMS
IBM COMPUTERS
INTEGRAL TRANSFORMATIONS
PERFORMANCE TESTING
POWER SYSTEMS
TESTING
TRANSFORMATIONS
TRANSFORMERS