Voltage transformer frequency response. Measuring harmonics in Norwegian 300 kV and 132 kV power systems

Author

Seljeseth, H. ; Saethre, E.A. ; Ohnstad, T. ; Lien, I.

Author_Institution

SINTEF, Trondheim, Norway

Volume

2

fYear

1998

fDate

14-18 Oct 1998

Firstpage

820

Abstract

Measuring harmonics in high voltage power systems with inductive and in particular capacitive voltage transformers, CVTs, may cause large errors. Test carried out by The Norwegian National Grid Company (Statnett), Bergenshalvoens Kommunale Kraftselskap (BKK) and The Norwegian Electric Power Research Institute (now SINTEF Energy Research) revealed errors from 80% to +1200% (0,2-12 pu) of correct values. Inductive voltage transformers did have a relatively small error up to 29^th harmonic (1450 Hz) while capacitive voltage transformers had large errors at a few hundred Hz. Carrying out calibration tests on voltage transformers and capacitive voltage transformers in particular may correct most of the errors. Still inductive voltage transformers should be preferred for harmonic measurements where possible

Keywords

calibration; frequency response; harmonic distortion; instrument transformers; potential transformers; power system harmonics; power system measurement; power transformers; voltage measurement; 132 kV; 1450 Hz; 300 kV; Norway; calibration tests; capacitive voltage transformers; inductive voltage transformers; power system harmonics measurement; voltage transformer frequency response; Calibration; Error correction; Frequency response; Particle measurements; Power measurement; Power system harmonics; Power system measurements; Power systems; Testing; Voltage transformers;

fLanguage

English

Publisher

ieee

Conference_Titel

Harmonics and Quality of Power Proceedings, 1998. Proceedings. 8th International Conference On

Conference_Location

Athens

Print_ISBN

0-7803-5105-3

Type

conf

DOI

10.1109/ICHQP.1998.760148

Filename

760148