Transmission level instrument transformers and transient event recorders characterization for harmonic measurements

A technique for laboratory characterization of instrument transformers designed for transmission level voltage and current measurements is presented. The technique is also extended to transient event recorders (TERs). The objective of the method is to determine the suitability of existing substation...

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Bibliographic Details
Published inIEEE transactions on power delivery Vol. 8; no. 3; pp. 1507 - 1517
Main Authors Meliopoulos, A.P.S., Zhang, F., Zelingher, S., Stillman, G., Cokkinides, G.J., Coffeen, L., Burnett, R., McBride, J.
Format Journal Article
LanguageEnglish
Published United States IEEE 01.07.1993
Subjects
240200 - Power System Networks, Transmission & Distribution- (1990-)
ACCURACY
Current measurement
ELECTRIC MEASURING INSTRUMENTS
ELECTRICAL EQUIPMENT
ELECTRICAL TRANSIENTS
Frequency measurement
Frequency response
HARMONICS
Instrument transformers
Laboratories
Level control
Linearity
MEASURING INSTRUMENTS
MEASURING METHODS
OSCILLATIONS
Particle measurements
POWER SUBSTATIONS
POWER TRANSMISSION AND DISTRIBUTION
POWER TRANSMISSION LINES
Substations
Transfer functions
TRANSFORMERS
TRANSIENTS
VOLTAGE DROP
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Summary:A technique for laboratory characterization of instrument transformers designed for transmission level voltage and current measurements is presented. The technique is also extended to transient event recorders (TERs). The objective of the method is to determine the suitability of existing substation instrument transformers for harmonic measurements, particularly in the frequency range of 60 to 1500 Hz covering the first 25 harmonics. Specifically, the following characteristics are of interest: transfer function magnitude and phase, linearity, and sensitivity of the frequency response to burdens. The measurement technique is based on exciting the instrument transformer primary with an impulsive waveform. Both input and output waveforms are recorded using laboratory grade probes and digitizers. Digital signal processing techniques are used to compute the instrument transformer frequency response. Several voltage transformers and current transformers in the 230 kV-765 kV voltage range were tested. The results are described.< >
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0885-8977
1937-4208
DOI:10.1109/61.252677