Method to Measure CVT Transfer Function

Method to Measure CVT Transfer Function

The results of tests on a 275 kV and a 400 kV capacitor voltage transformer (CVT) are presented. The objective has been to determine the transfer function of the CVTs in the Scottish Power EHV system, which in turn can be used to compensate for the errors at harmonic frequencies. As a primary requir...

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Veröffentlicht in:IEEE power engineering review 2002-06, Vol.22 (6), p.63-63
Hauptverfasser: Ghassemi, F., Gale, P. F., Clegg, B., Cumming, T., Coutts, C.
Format: Artikel
Sprache:eng
Schlagworte:
Automatic voltage control
Capacitors
CVT
CVT modeling
CVT transfer function
Dismantling
Errors
Excitation
Frequency
Frequency response
Harmonic measurement
Mathematical models
Power system harmonics
Power system modeling
Pulse width modulation
Reactive power
Testing
Transfer functions
Voltage control
Voltage transformers
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Beschreibung
Zusammenfassung:The results of tests on a 275 kV and a 400 kV capacitor voltage transformer (CVT) are presented. The objective has been to determine the transfer function of the CVTs in the Scottish Power EHV system, which in turn can be used to compensate for the errors at harmonic frequencies. As a primary requirement, the magnetic elements of the CVTs must be excited at nearly their nominal magnetic states. A test procedure is presented that does not require CVT disassembling and/or modeling and ensures that the above essential requirement is satisfied. The effects of burden on the frequency response will also be presented. It will be confirmed that the size and nature of burden affect the CVT frequency characteristic.
ISSN:0272-1724
1558-1705
DOI:10.1109/MPER.2002.4312316