Protection of power transformers against the effect of magnetic storms

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23220%2F21%3A43962343" target="_blank" >RIV/49777513:23220/21:43962343 - isvavai.cz</a>

Result on the web

<a href="https://www.sciendo.com/article/10.2478/jee-2021-0034" target="_blank" >https://www.sciendo.com/article/10.2478/jee-2021-0034</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2478/jee-2021-0034" target="_blank" >10.2478/jee-2021-0034</a>

Result language

angličtina

Original language name

Protection of power transformers against the effect of magnetic storms

Original language description

In the operation of large-scale power systems for the long-distance transmission of large amounts of electricity, a number of cases have been reported in which anomalies in the Earth’s magnetosphere, referred to as geomagnetic storms, have caused a severe system collapse. Changes in the geomagnetic field cause a semi-saturating phenomenon, in which the high-voltage lines and especially the high-voltage windings of the power transformers of the system are overloaded with current and subsequently also thermally. The present article briefly explains the physical nature of magnetic storms and then describes a new device that either eliminates the possibility of a step-down power transformer accident or significantly reduces its effects on the system. The essence of this device are frequency filters, which are connected in parallel to the high-voltage windings of power transformers. At the beginning of a geomagnetic storm, the frequency filter is automatically connected to the system and is automatically disconnected when it subsides. The operation of frequency filters does not require human intervention, acquisition and operating costs are low and their integration into existing power systems is easy.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20201 - Electrical and electronic engineering

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

Journal of ELECTRICAL ENGINEERING

ISSN

1335-3632

e-ISSN

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Volume of the periodical

72

Issue of the periodical within the volume

4

Country of publishing house

SK - SLOVAKIA

Number of pages

7

Pages from-to

249-255

UT code for WoS article

000696957400004

EID of the result in the Scopus database

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