Effects of Geomagnetic Disturbances on Power Transformers

Explosive eruptions on the sun’s surface eject charged particles that may travel the earth path. They cause disturbances in earth’s magnetic field and as a result, a low frequency current is induced in electrical power system transmission lines. The induced current increases operating temperature of power transformers. This overheating reduces lifetime of the transformer and may even lead to a catastrophic failure of the transformer. In this project, the overheating is evaluated by measuring amount of byproducts generated in oil insulation of the transformer including dissolved gases and bubbles. These byproducts are indicators of insulation deterioration. The measurements are performed under various conditions, and novel contactless measuring techniques are developed in this regard. Results of this project provide power system operators with critical limits on operating temperature of power transformers to increase their lifespan and prevent catastrophic failures during a geomagnetic disturbance.

Faculty Supervisor:

Afshin Rezaei-Zare

Student:

Partner:

Leibniz University Hannover

Discipline:

Engineering

Sector:

Energy and Utilities; Technology; Green/Alternative Energy

University:

York University

Program: