Automated calibration methods for a high-voltage Park divider

Author

Su, Tsung-han ; Chen, I-Pao ; Tsao, S. Hoi

Author_Institution

Nat. Meas. Lab., Hsinchu, Taiwan

Volume

44

Issue

2

fYear

1995

fDate

4/1/1995 12:00:00 AM

Firstpage

318

Lastpage

321

Abstract

Two new methods of calibrating the 1/10 voltage ratio of a 100-kV Park divider, which has been provided with a set of tenths ratio taps is described. The proposed methods make PC-controlled measurements based on (1) Wheatstone bridge circuits configurable entirely with the resistive sections of the tapped divider, and (2) a digital conductance comparator, respectively. The 1/10 ratio measurements made by these quite different methods were found to be consistent to 3 ppm of the ratio. The conductance comparison method, with an assessed standard uncertainty of 2 ppm, determined precisely the effect of self-heating on the measured ratio, minute-by-minute after the rated input was applied. Subdividing the established 1/10 ratio to 1/100 and 1/10⁵ of input, however, is based on more conventional methods. These subdivided ratios have been given a standard uncertainty not exceeding 6 ppm in the absence of corona discharge

Keywords

bridge circuits; calibration; comparators (circuits); high-voltage techniques; measurement standards; microcomputer applications; voltage dividers; voltage measurement; 1/10 ratio measurements; 1/10 voltage ratio; 100 kV; HV Park divider; PC-controlled measurements; Wheatstone bridge circuits; automated calibration; conductance comparison; corona discharge; digital conductance comparator; measured ratio; resistive sections; self-heating; standard uncertainty; tapped divider; Bridge circuits; Calibration; Corona; Digital relays; Elbow; Fasteners; Laboratories; Measurement standards; Power supplies; Voltage;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.377841

Filename

377841