A Method for Studying Circuit Transient Recovery Voltage Characteristics of Electric Power Systems [includes discussion]

Kotheimer, W.C.

doi:10.1109/aieepas.1955.4499196

Cited by 10 publications

(1 citation statement)

References 6 publications

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“…In those critical cases, the TRV must be measured, either by means of actual short circuit tests, which are rather expensive, or with the low-voltage current injection (LVCI) method that was introduced for the first time in [7]. Both types of measurements have been performed on several transformers of Bonneville Power Administration (BPA).…”

Section: Introductionmentioning

confidence: 99%

Calculating the Transient Recovery Voltage Associated With Clearing Transformer Determined Faults by Means of Frequency Response Analysis

Steurer¹,

Hribernik

Brunke

2004

IEEE Trans. Power Delivery

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The transient recovery voltage (TRV) associated with power-transformer terminal faults is essential for correctly applying circuit breakers. Because presently used methods only allow for roughly estimating an equivalent single TRV ringing frequency, more accurate but inexpensive methods are needed. The novel method presented in this paper employs frequency response analysis (FRA) for measuring the transformer's complex short circuit impedance . From that, the frequency spectrum of the TRV is approximated by the ratio of over the frequency square. Inverse fast Fourier transformation finally leads to the time domain signal. Comparing measured TRV signals from several field tests with the calculated ones prove this simple but effective method. Even multimode oscillations that cannot be reproduced by rough estimating tools are covered. It is concluded that the presented method provides a valuable tool for extracting inherent TRV parameters, either from routinely performed FRA measurements or from lightning impulse tests without significant additional costs.Index Terms-Circuit breaker, Fourier transform, frequency response analysis, power transformer, short circuit impedance, transient recovery voltage.

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Section: Introductionmentioning

confidence: 99%