Method to measure CVT transfer function

F. Ghassemi

doi:10.1109/TPWRD.2002.803739

Method to measure CVT transfer function

2002-10-01

48

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AI

DOI：10.1109/TPWRD.2002.803739

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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 they 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 will also be presented. It will be confirmed that the size and nature of burden affect the CVT frequency characteristic.

Keyword:

CVT

CVT modeling

CVT transfer function

harmonic measurement

Method to measure CVT transfer function

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