Impact of Geomagnetically Induced Currents on Power Transformers and Power System

Author(s):

Roshni.R.Jethani , T.G.P.C.E.T; Dr.Harikumar Naidu, TGPCET

Keywords:

Geomagnetic Induced Current (GIC), Geomagnetic Disturbance (GMD), Power System, Transformer

Abstract:

The cause of GIC and transformers failure is due to solar storm activities. Solar storms produce coronal mass ejection due to which Earth’s magnetic field changes and because of it Geomagnetic induced current enters the power network and cause changes in real and reactive power due to which voltage fluctuates and frequency of system changes. Utilization of reactive power consumption is estimated by GIC and reactive power absorption by the core. Methods are used to determine the frequency and magnitude of the harmonic currents generated by a saturated transformer due to GIC. Geomagnetic Induced Currents are to threat to power transformers and power system. Effect of GIC is calculated by injecting DC currents into a three phase power transformer. A DC source is placed between the secondary neutral terminal and the neutral point of the load. Simulation of GIC can be done with simpower system to transient stability of power system under a geomagnetic disturbance (GMD).

Other Details:

Manuscript Id	:	IJSTEV3I2081
Published in	:	Volume : 3, Issue : 2
Publication Date	:	01/09/2016
Page(s)	:	218-222

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