%0 Journal Article
%@holdercode {isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S}
%@nexthigherunit 8JMKD3MGPCW/3EU29DP
%@archivingpolicy denypublisher denyfinaldraft
%X Geomagnetically induced currents (GICs) are a ground end manifestation of space weather processes. During large geomagnetic storms, GICs flow between the grounding points of power transformers and along electric power transmission lines connecting the transformers. In high-latitude regions, damages to power transformers are reported where storm time geomagnetic variations are very rapid and large (>1000 nT), and hence the GICs as large as or even greater than 100 A end up flowing through the windings of power transformers. At low latitudes, geomagnetic variations are less severe, and hence much smaller GIC values are generally reported there. However, the flow of GICs and their effects on power transformers are complex processes, and careful evaluation is needed even in such low-latitude regions as, for example, Brazil. We report here a study on GIC measurements in Brazil conducted under a cooperative project between FURNAS (the Brazilian electric power company) and the National Institute for Space Research. During a large geomagnetic storm, which took place on 710 November 2004, the GIC amplitudes, measured on the basis of geomagnetic variations in 500 kV power transmission lines in the SE region of Brazil, were found to be around 15 A.
%8 Apr.
%N 4
%T Geomagnetically induced currents in an electric power transmission system at low latitudes in Brazil: A case study
%@secondarytype PRE PI
%K Geomagnetically induced currents, Power transformer, Transmission lines, GEOPHYSICS.
%@usergroup administrator
%@usergroup banon
%@usergroup rosemary
%@usergroup simone
%@group DGE-INPE-MCT-BR
%@group DGE-INPE-MCT-BR
%@group DGE-INPE-MCT-BR
%@group DGE-INPE-MCT-BR
%@group DGE-INPE-MCT-BR
%@group DGE-INPE-MCT-BR
%@group DGE-INPE-MCT-BR
%3 swe198.pdf
%@secondarykey INPE--PRE/
%@issn 1539-4956
%2 sid.inpe.br/mtc-m17@80/2007/06.25.14.26.17
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation FURNAS Centrais Elétricas S.A., Rio de Janeiro, Brazil
%@affiliation FURNAS Centrais Elétricas S.A., Rio de Janeiro, Brazil
%@affiliation FURNAS Centrais Elétricas S.A., Rio de Janeiro, Brazil
%@affiliation Space Research Unit, Finnish Meteorological Institute, Helsinki, Finland
%@affiliation Space Research Unit, Finnish Meteorological Institute, Helsinki, Finland
%B Space Weather
%@versiontype publisher
%4 sid.inpe.br/mtc-m17@80/2007/06.25.14.26
%@documentstage not transferred
%D 2007
%V 5
%@doi 10.1029/2006SW000282
%A Trivedi, Nalin  Babulal,
%A Vitorello, Ícaro,
%A Kabata, Wanderli,
%A Dutra, Severino Luiz Guimarães,
%A Padilha, Antonio Lopes,
%A Bologna, Maurício de Souza,
%A Pádua, Marcelo Banik de,
%A Soares, Alexandre Pinhel,
%A Luz, Guilherme Sarcinelli,
%A Pinto, Fábio de A.,
%A Pirjola, Risto,
%A Viljanen, Ari,
%@dissemination WEBSCI
%@area CEA