F.S. Prabhakara

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The authors present a fast and approximate method for calculation of frequency and duration of voltage drops in plants which have a large number of intermittent loads such as welders and robots. The intermittent nature of welder and robot loads is approximated by the Markov model for computing the frequency and duration. A novel approach combining the(More)
Geomagnetic induced current (GIC) phenomena are reviewed. A modeling approach in which the complex geomagnetic disturbance phenomenon is divided into three submodels is described. They are an ionospheric current source model, a geological (earth resistivity) model, and a power system model. The ionospheric and earth resistivity models are used in a finite(More)
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