Method and equipment for the protection of power systems...

Electricity: electrical systems and devices – Safety and protection of systems and devices – Transformer protection

Reexamination Certificate

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Reexamination Certificate

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07489485

ABSTRACT:
The present invention relates to a method for protection of power transformers and other power system components, which are vulnerable to geomagnetically induced currents, which comprises feeding from an overhead line/s or cable conductor/s one or more DC-diverter consisting of primary diverter windings and compensation windings applied on a respective magnetic core leg, which diverter is connected to critical busses, and diverting “quasi” direct current flowing on the overhead lines or cable conductors as a result of the earth surface potential gradients caused by geomagnetically induced currents, as well as a DC diverter to carry out the method.

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Xiadang et al., “Study and discussion of methods for mitigating and eliminating geomagnetically induced current (GIC)”;Automation of Electric Power Systems; China; 2000, vol. 24, No. 7; pp. 58-60.
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Xiangdong et al., “Study and Discussion of Methods for Mitigating and Eliminating Geomagnetically Induced Current (GIC),” Automation of Electric Power Systems, vol. 24, No. 7, Apr. 11, 2000, pp. 58-60.

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