Method to measure CVT transfer function

Author

Ghassemi, Foroozan ; Gale, Philip F. ; Clegg, Barry ; Cumming, Tom ; Coutts, Colin

Author_Institution

Hathaway Syst. Ltd., Hoddesdon, UK

Volume

17

Issue

4

fYear

2002

fDate

10/1/2002 12:00:00 AM

Firstpage

915

Lastpage

920

Abstract

In this paper, the results of tests on a 275 and a 400 kV capacitor voltage transformer are presented. The objective has been to determine the transfer function of the CVTs in the Scottish Power extra-high-voltage (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 capacitor voltage transformers (CVTs) must be excited at nearly their nominal magnetic states. A test procedure is presented, which 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 is also presented. It is confirmed that the size and nature of burden affect the CVT frequency characteristic.

Keywords

error compensation; frequency response; potential transformers; power system harmonics; transfer functions; voltage measurement; 275 kV; 400 kV; EHV system; Scottish Power; burden effects; capacitor voltage transformer; extra-high-voltage system; frequency response; harmonic frequencies error compensation; nominal magnetic states; test procedure; transfer function; Capacitors; Frequency measurement; Frequency response; Instruments; Pollution measurement; Substations; Testing; Transfer functions; Voltage transformers; Wounds;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2002.803739

Filename

1046863