Immediate and delayed responses of power lines and transformers in the Czech electric power grid to geomagnetic storms

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F20%3A00534668" target="_blank" >RIV/67985815:_____/20:00534668 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/20:10413874

Result on the web

<a href="http://hdl.handle.net/11104/0312840" target="_blank" >http://hdl.handle.net/11104/0312840</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/swsc/2020025" target="_blank" >10.1051/swsc/2020025</a>

Result language

angličtina

Original language name

Immediate and delayed responses of power lines and transformers in the Czech electric power grid to geomagnetic storms

Original language description

We search for a rapid response of devices in the Czech electric distribution grid to disturbed days of high geomagnetic activity. Such disturbed days are described either by the cumulative storm-time Dst or d(SYM-H)/dtlow-latitude indices mainly influenced by ring current variations, by the cumulative AE high-latitude index measuring substorm-related auroral current variations, or by the cumulative ap mid-latitude index measuring both ring and auroral current variations. We use superposed epoch analysis to identify possible increases of anomaly rates during and after such disturbed days. We show that in the case of abundant series of anomalies on power lines, the anomaly rate increases significantly immediately (within 1 day) after the onset of geomagnetic storms. In the case of transformers, the increase of the anomaly rate is generally delayed by 2-3 days. We also find that transformers and some electric substations seem to be sensitive to a prolonged exposure to substorms, with a delayed increase of anomalies. Overall, we show that in the 5-day period following the commencement of geomagnetic activity there is an approximately 5-10% increase in the recorded anomalies in the Czech power grid and thus this fraction of anomalies is probably related to an exposure to GICs.

Czech name

—

Czech description

—

Type

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

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

Journal of Space Weather and Space Climate

ISSN

2115-7251

e-ISSN

—

Volume of the periodical

10

Issue of the periodical within the volume

July

Country of publishing house

FR - FRANCE

Number of pages

31

Pages from-to

26

UT code for WoS article

000549812900001

EID of the result in the Scopus database

2-s2.0-85087861940