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Presenter: Manpreet Kaur
Supervisor:

Date: Wed, January 24, 2018
Time: 15:00:00 - 16:00:00
Place: EOW 430

ABSTRACT

 ABSTRACT: A geomagnetic storm is a disturbance of the earth magnetosphere  caused by a charged cloud of plasma (also known as solar wind) released  after a solar flare event. The time varying magnetic field leads to an  electric field which results in geomagnetically induced currents (GICs).

 These currents induced in power lines flow to ground via substation  transformers which cause saturation of the transformer cores, leading to  damage the transformer. In addition, the harmonics induced in the power  lines cause unwanted relay operations and trip power lines, which  compromise the stability of the power system. Such events led to the  famous Quebec blackout in Mar. 1989 which left the province without power  for 9 hours. According to Faraday’s Law, the change in geomagnetic field  is directly related to the electric field that induces the GICs. In  referred paper statistical models of the geomagnetic time derivative were  developed and tested using data from the CANOPUS array of magnetometers.

 Empirical models for the log of the mean and log of the variance were used  to predict extreme geomagnetic disturbances induced by solar wind. In this  report, the results obtained in referred paper are verified using over a  year of AUTUMNX data which is about the same number of data values as the

 10 years of CANOPUS data. An investigation of the effect of GICs on power  systems is also presented. The geomagnetic data from the AUTUMNX array of  magnetometers is related to harmonic data from the Hydro-Quebec power  network. In the future, this can help Hydro-Quebec predict and prevent  events like the 1989 blackout.