AC/DC Current Transformer with Single Winding

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F13%3A00207125" target="_blank" >RIV/68407700:21230/13:00207125 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

AC/DC Current Transformer with Single Winding

Popis výsledku v původním jazyce

DC currents in power grids are created by induction from geomagnetic variations and newly also by transformerless power inverters installed in solar power stations. These currents may cause serious errors of current transformers (CTs) measuring the consumed energy, but also cause overload of distribution transformers which may result in blackout. Installing DC current sensors into the grid would be very expensive. We have shown that the existing CTs in the grid can be used in the fluxgate mode to simultaneously measure DC current. Utilizing this mode, the CT AC error is inevitably increased. We analyze the sources of these errors and show techniques to reduce them. The experiments were made on the off-the-shelf 500 A/5A CT. We show that the uncompensated 5A DC current without compensation increases its AC amplitude error from 0.1% to 1%. We also found that the dominant additional error was caused by the increased burden. With the optimized design of the excitation circuit it is possibl

Název v anglickém jazyce

AC/DC Current Transformer with Single Winding

Popis výsledku anglicky

DC currents in power grids are created by induction from geomagnetic variations and newly also by transformerless power inverters installed in solar power stations. These currents may cause serious errors of current transformers (CTs) measuring the consumed energy, but also cause overload of distribution transformers which may result in blackout. Installing DC current sensors into the grid would be very expensive. We have shown that the existing CTs in the grid can be used in the fluxgate mode to simultaneously measure DC current. Utilizing this mode, the CT AC error is inevitably increased. We analyze the sources of these errors and show techniques to reduce them. The experiments were made on the off-the-shelf 500 A/5A CT. We show that the uncompensated 5A DC current without compensation increases its AC amplitude error from 0.1% to 1%. We also found that the dominant additional error was caused by the increased burden. With the optimized design of the excitation circuit it is possibl

Druh

O - Ostatní výsledky

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

OECD FORD obor

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Projekt

<a href="/cs/project/GAP102%2F12%2F2177" target="_blank" >GAP102/12/2177: Nanostrukturované magneticky měkké materiály pro sensory</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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