scholarly journals Geomagnetically Induced Currents in Ethiopia Power Grid: Calculation and Analysis

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 64649-64658 ◽  
Author(s):  
Chunming Liu ◽  
Yared Senbato Ganebo ◽  
Hongmei Wang ◽  
Xinjie Li
Keyword(s):  
Power Grid ◽  
Geomagnetically Induced Currents ◽  
Induced Currents

scholarly journals Prediction of geomagnetically induced currents (GICs) flowing in Japanese power grid for Carrington-class magnetic storms

2021 ◽  
Vol 73 (1) ◽  
Author(s):  
Yusuke Ebihara ◽  
Shinichi Watari ◽  
Sandeep Kumar
Keyword(s):  
Transmission Lines ◽  
Power Grid ◽  
Magnetic Storms ◽  
Power Grids ◽  
Geomagnetically Induced Currents ◽  
Geomagnetic Disturbances ◽  
Low Latitude ◽  
Solar Eruptions ◽  
Induced Currents ◽  
Extra High Voltage

AbstractLarge-amplitude geomagnetically induced currents (GICs) are the natural consequences of the solar–terrestrial connection triggered by solar eruptions. The threat of severe damage of power grids due to the GICs is a major concern, in particular, at high latitudes, but is not well understood as for low-latitude power grids. The purpose of this study is to evaluate the lower limit of the GICs that could flow in the Japanese power grid against a Carrington-class severe magnetic storm. On the basis of the geomagnetic disturbances (GMDs) observed at Colaba, India, during the Carrington event in 1859, we calculated the geoelectric disturbances (GEDs) by a convolution theory, and calculated GICs flowing through transformers at 3 substations in the Japanese extra-high-voltage (500-kV) power grid by a linear combination of the GEDs. The estimated GEDs could reach ~ 2.5 V/km at Kakioka, and the GICs could reach, at least, 89 ± 30 A near the storm maximum. These values are several times larger than those estimated for the 13–14 March 1989 storm (in which power blackout occurred in Canada), and the 29–31 October 2003 storm (in which power blackout occurred in Sweden). The GICs estimated here are the lower limits, and there is a probability of stronger GICs at other substations. The method introduced here will be immediately applicable for benchmark evaluation of low-latitude GICs against the Carrington-class magnetic storms if one assumes electrical parameters, such as resistance of transmission lines, with sufficient accuracy.

Power Grid Sensitivity Analysis of Geomagnetically Induced Currents

2013 ◽  
Vol 28 (4) ◽  
pp. 4821-4828 ◽  
Author(s):  
Thomas J. Overbye ◽  
Komal S. Shetye ◽  
Trevor R. Hutchins ◽  
Qun Qiu ◽  
James D. Weber
Keyword(s):  
Sensitivity Analysis ◽  
Power Grid ◽  
Geomagnetically Induced Currents ◽  
Induced Currents

On the flow of geomagnetically induced currents in an electric power transmission network

2010 ◽  
Vol 88 (5) ◽  
pp. 357-363 ◽  
Author(s):  
Risto J. Pirjola
Keyword(s):  
Electric Power ◽  
Power Transmission ◽  
Power Grid ◽  
Space Physics ◽  
Practical Significance ◽  
Test Model ◽  
Geomagnetically Induced Currents ◽  
Geophysical Research ◽  
Model Calculations ◽  
Induced Currents

Geomagnetically induced currents (GICs) in conductor networks are among the ground-level effects of space weather. GICs are a possible source of problems to the system. Today, electric power transmission grids are the most important concern regarding GICs, which may in the worst cases lead to blackouts in large areas and permanent damage to transformers. The evaluation of GIC risks and the design of possible countermeasures require estimation of expected GIC magnitudes in transformers. This can be achieved by model calculations supplemented by GIC recordings at some sites. Although in principle GICs can flow all over a large galvanically-connected power grid, which should thus be included as a whole in a GIC calculation, the network must usually be restricted somehow in practical computations of GICs. By using a power grid test model, this paper provides a systematic numerical investigation showing that GICs do not flow over very long distances in a power grid, which is a good result and justifies the neglect of the parts of the network that lie far away from the area of primary interest. Besides practical significance in electric power engineering, studies of GICs can be used for space physics and geophysical research as well. It is also important to understand the features of the flow pattern of GICs in a network.

Geomagnetically induced currents in a power grid of northeastern Spain

Space Weather ◽  
2012 ◽  
Vol 10 (6) ◽  
pp. n/a-n/a ◽  
Author(s):  
J. Miquel Torta ◽  
Lluís Serrano ◽  
J. Ramon Regué ◽  
Albert M. Sánchez ◽  
Elionor Roldán
Keyword(s):  
Power Grid ◽  
Geomagnetically Induced Currents ◽  
Induced Currents

Geomagnetically induced currents in the Uruguayan high-voltage power grid

2013 ◽  
Vol 195 (2) ◽  
pp. 844-853 ◽  
Author(s):  
R. Caraballo ◽  
L. Sánchez Bettucci ◽  
G. Tancredi
Keyword(s):  
High Voltage ◽  
Power Grid ◽  
Geomagnetically Induced Currents ◽  
Induced Currents
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