Abstract
This paper presents the results of research related to the issues arising from DC excitation of power transformers due to geomagnetically induced currents (GIC). First, the GIC phenomena and their influence on power system operation are discussed. Then, a recorded case of tripping of the transformer differential protection due to geomagnetic disturbances (GD), as well as simulation signals from a developed model of a transformer subjected to a GD are analyzed. Next, two algorithms for GIC detection utilizing the rate of change of transformer differential currents and the DC component in the neutral current are proposed, thoroughly tested, and recommended.
Subject
Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous)
Reference20 articles.
1. Classical and Recent Aspects of Power System Optimization;Oyedokun,2018
2. Effects of Geomagnetically Induced Currents on Power Transformers and Power Systems. CIGRE 2012, Session A2-304https://library.e.abb.com/public/cbd31097f5bd26bfc1257b16002e30f1/A2_304_Cigre2012_1LAB000513_Effects%20of%20geomagnetically%20induced%20currents%20on%20power%20transformers%20and%20power%20systems.pdf
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