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ON-SITE ACCURACY COMPARISON OF CAPACITOR AND INDUCTIVE VOLTAGE TRANSFORMERS

Ana Orešković ; Končar - Electrical Engineering Institute
Zdenko Godec ; Končar - Electrical Engineering Institute
Miroslav Poljak ; Končar - Electrical Engineering Institute
Rajko Gardijan ; Končar - Electrical Engineering Institute

Sažetak

In this paper an on-site accuracy comparison of capacitor and inductive voltage transformers is
presented. A 400/110 kV transformer substation in Croatia has been chosen as an appropriate location
for the comparison as both types of transformers (capacitor and inductive) operate there simultaneously.
Each transformer type is a part of one of the two existing measuring chains for measurement of electrical
energy. Their accuracy comparison is, therefore, carried out indirectly, by actually comparing the energies
measured by the first and the second measuring chain and then estimating the measurement uncertainty
of their difference. Without measurement uncertainty, a parameter that shows the quality of any
measurement result, it is generally not possible to conclude about the accuracy of measurement or to
compare measurement results mutually. In this measurement uncertainty estimation real on-site
conditions in transformer substation, especially those which effect voltage transformer accuracy, have
been taken into account (voltage, transformer load, frequency, temperature, etc.)

Ključne riječi

Capacitor voltage transformer; inductive voltage transformer; measurement accuracy; measurement uncertainty; measurement of electrical energy

Hrčak ID:

198829

URI

https://hrcak.srce.hr/198829

Datum izdavanja:

15.7.2017.

Posjeta: 861 *