Detection of Disturbance of Working Conditions of Current Transformer in Energy Meters for Reduction of Unauthorized Current Consumption
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F09%3A00159053" target="_blank" >RIV/68407700:21230/09:00159053 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Detection of Disturbance of Working Conditions of Current Transformer in Energy Meters for Reduction of Unauthorized Current Consumption
Original language description
Current transformers can be very easily affected by dc component of measured current. The behavior of such transformers can be different in comparison with normal conditions. The errors of power measurements arise in order of units of percent and can beboth positive and negative according to the type of load for some type of current transformers. The errors are mainly caused by change of phase shift between primary and secondary current. The source of the problem is dc magnetic flux in the ferromagnetic core of the current transformer. The presence of dc magnetic field in ferromagnetic core of current transformer can be, in some cases, detected by analyzing the frequency spectrum of current signal using a microcontroller, usually by measuring the second harmonic. According to these results the energy meter is able to decide about possibility of unauthorized current consumption.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
JA - Electronics and optoelectronics
OECD FORD branch
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Result continuities
Project
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Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
PEDS 2009 - The Eighth International Conference on Power Electronics and Drive Systems
ISBN
978-1-4244-4166-2
ISSN
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e-ISSN
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Number of pages
4
Pages from-to
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Publisher name
IEEE Power Electronics Society - PELS
Place of publication
Taipei
Event location
Taipei
Event date
Nov 2, 2009
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000277469700052