NDLI: A medium voltage signal generator for the testing of voltage measurement transducers

Content Provider	IEEE Xplore Digital Library
Author	Faifer, M. Ottoboni, R. Toscani, S. Cherbaucich, C. Gentili, M. Mazza, P.
Copyright Year	2013
Description	Author affiliation: Dipt. di Elettrotec., Politec. di Milano, Milan, Italy (Faifer, M.; Ottoboni, R.; Toscani, S.) \|\| RSE S.p.A., Milan, Italy (Cherbaucich, C.; Gentili, M.; Mazza, P.)
Abstract	The importance of power quality monitoring in medium voltage (MV) systems has dramatically increased in the last years. It is well known that a measurement system with wide bandwidth and very low distortion is mandatory for this purpose. Usually, the performance bottlenecks are the transducers which have to be carefully selected according to the required accuracy. Therefore, it is very important to test them in real-world (nonsinusoidal) operating conditions. However, the characterization requires generating arbitrary voltage waveforms with amplitude of several kilovolts. This paper proposes a very simple MV waveform generator employing basic instrumentation which is very common in calibration laboratories. It consists in an arbitrary waveform generator (AWG) connected to a power amplifier which feeds the low voltage winding of a step up transformer. The secondary, high voltage winding is attached to a reference voltage transducer and to the device under test. In general, the shape of the secondary voltage waveform can be very different from the reference voltage of the signal generator. However, assuming that the nonlinearities of the system are negligible, it is possible to estimate the transfer function between the reference voltage of the signal generator and the secondary voltage. Then, it is possible to compute the reference voltage for the AWG in order to obtain the desired secondary voltage waveform. This technique has been implemented and its performance has been tested. The experimental activity has shown that an accuracy of a few percent can be easily achieved.
Sponsorship	IEEE Instrum. Meas. Soc.
Starting Page	194
Ending Page	199
File Size	387603
Page Count	6
File Format	PDF
ISBN	9781467346214
ISSN	10915281
e-ISBN	9781467346238
DOI	10.1109/I2MTC.2013.6555408
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-05-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Transducers Power amplifiers Frequency response Estimation Signal generators Windings Voltage measurement power system harmonics instrument transformers voltage transducers power transformers frequency response
Content Type	Text
Resource Type	Article
Subject	Instrumentation Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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