Detection of Disturbance of Working Conditions of Current Transformer in Energy Meters for Reduction of Unauthorized Current Consumption

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Detection of Disturbance of Working Conditions of Current Transformer in Energy Meters for Reduction of Unauthorized Current Consumption

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Detection of Disturbance of Working Conditions of Current Transformer in Energy Meters for Reduction of Unauthorized Current Consumption

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

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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Počet stran výsledku

4

Strana od-do

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Název nakladatele

IEEE Power Electronics Society - PELS

Místo vydání

Taipei

Místo konání akce

Taipei

Datum konání akce

2. 11. 2009

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000277469700052