Traceability of Low-Power Voltage Transformer for Medium Voltage Application

Author

Pasini, Gaetano ; Peretto, Lorenzo ; Roccato, Paolo ; Sardi, Angelo ; Tinarelli, Roberto

Author_Institution

Dept. of Electr., Electron. & Inf. Eng. Guglielmo Marconi, Univ. of Bologna, Bologna, Italy

Volume

63

Issue

12

fYear

2014

fDate

Dec. 2014

Firstpage

2804

Lastpage

2812

Abstract

In this paper, the measuring and calibration techniques useful for ensuring the traceability of nonconventional voltage transformer (VT), used in ac power plant up to 52 kV, are described and discussed. In particular, a setup made by commercially available devices is presented and an in-depth accuracy analysis is performed by considering all the uncertainty sources located in the measurement chain. The obtained results prove that it can be used for the calibration of 0.5 accuracy class low-power VTs. In addition, the sources that contribute more to the uncertainties on the ratio and phase errors are highlighted and suggestions on where to act to further improve the accuracy of the presented setup are given.

Keywords

low-power electronics; potential transformers; ac power plant; low-power voltage transformer; measurement chain; medium voltage application; phase errors; Calibration; Frequency measurement; Measurement uncertainty; Uncertainty; Voltage measurement; Voltage transformers; Calibration; instrument transformer (IT); traceability; uncertainty; voltage transformer (VT); voltage transformer (VT).;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2014.2318373

Filename

6810167