Results 201 to 210 of about 2,994 (242)
Some of the next articles are maybe not open access.
Finnish Geomagnetically Induced Currents Project
IEEE Power Engineering Review, 1995This article is a summary of Results of the Finnish Project on Geomagnetically Induced Currents,'' published in Surveys in Geophysics 15:383-408, Kluwer Academic Publishers, Netherlands, 1994. IVO and FMI carried out a 1-year GIC project from June 1991 to May 1992.
A. Vilianen, R. Pirjola
openaire +1 more source
Modeling Geomagnetically Induced Currents Using Geomagnetic Indices and Data
IEEE Transactions on Plasma Science, 2004The possibilities of forecasting geomagnetically induced currents (GIC) in power transmission networks are dependent on the success in modeling these currents. To provide a valuable user-oriented forecast, modeling and proper evaluation of the models using GIC data is important. Many forecasts of geomagnetic storms are presented in terms of geomagnetic
L. Trichtchenko +3 more
openaire +1 more source
Geomagnetically Induced Current Analyzed with Wavelet Extraction
Brazilian Journal of Physics, 2022Investigation of electrodynamic effects considering South American features is essential to extend understanding of middle- to low-latitude space weather phenomena. For retrieving magnetic contributions related to geomagnetically induced currents (GIC), a wavelet-based filtering method is verified and applied to magnetic records on the ground.
Odim Mendes +6 more
openaire +3 more sources
Geomagnetically Induced Current Effects on Transformers
IEEE Power Engineering Review, 2002Geomagnetically induced currents (GICs) can cause saturation of the magnetic circuit of transformers in a power system. This saturation can increase the MVAr absorption of the transformers, leading to voltage-control problems, generating significant harmonic currents, and cause heating of the internal components of the transformer itself, leading to ...
openaire +1 more source
Geomagnetically induced currents in central Europe
2020<p>Eruptive events on the Sun interacts with the magnetosphere and can affect even the Earth-bound structures such as power transmission networks via geomagnetically induced electric currents (GICs). We quantify the geomagnetic activity by the K-index computed from local measurements of the geomagnetic field and investigate its ...
Tatiana Výbošťoková +2 more
openaire +1 more source
Relation of geomagnetically induced currents and local geomagnetic variations
IEEE Transactions on Power Delivery, 1998Geomagnetically induced currents (GICs) were recorded in June 1991 to May 1992 in a 400 kV transmission line in southern Finland. Geomagnetic field variations were simultaneously measured at the nearby Nurmijarvi Geophysical Observatory. Two models are presented here to calculate GICs from the time derivative of the magnetic field.
openaire +1 more source
Research and Assessments of Geomagnetically Induced Currents
Advanced Materials Research, 2011The geomagnetic storm which is caused by the sun's activity is a global natural disaster. When the sun surface activity is exuberant, especially in sun spots period, the surface of the sun will release X-ray, ultraviolet, visible and high-energy proton or electron beam. Part of the charged particles form current and influence the earth's magnetic field,
You Jie Ma, Dong Fang Wu, Xue Song Zhou
openaire +1 more source
Geomagnetic activity indicators for geomagnetically induced current studies in South Africa
Advances in Space Research, 2011Abstract Intense geomagnetic activity is known to give rise to large geomagnetically induced currents (GICs) in power transmission grids. Recordings of geomagnetic activity provide an efficient and economical way for power transmission system operators to assess GIC risks in retrospective studies. This study investigates local geomagnetic indicators (
Chigomezyo M. Ngwira +2 more
openaire +1 more source
Geomagnetically induced currents during magnetic storms
IEEE Transactions on Plasma Science, 2000The electric field which is induced by geomagnetic storms drives currents in technological systems, such as electric power transmission grids, oil and gas pipelines, telecommunication cables, and railway equipment. These geomagnetically induced currents (GIC) cause problems to the systems.
openaire +1 more source
Real-Time Simulation of Geomagnetically Induced Currents
2007 7th International Symposium on Electromagnetic Compatibility and Electromagnetic Ecology, 2007To monitor the impact of geomagnetic disturbances on a power network a system has been developed to provide real-time simulations of the geomagnetically induced currents flowing in a power system. The Real- Time GIC Simulator uses real-time magnetic data from a magnetic observatory.
D.H. Boteler +6 more
openaire +1 more source