Self-powered direct current mitigation circuit for transformers
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United States of America Patent
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N/A
Issued Date -
Oct 7, 2004
app pub date -
Aug 5, 2003
filing date -
Aug 5, 2002
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A DC mitigation circuit for mitigating the effects of DC in power systems, and a method for doing the same, are provided. The DC mitigation circuit comprises a control circuit for evaluating the amount of DC or harmonic currents resulting from the DC in a transmission line. Switches provide a current to a winding of a transformer, and are controlled by the control circuit. The current provided to the winding generates a magnetic flux that offsets a flux created by DC or harmonic currents resulting from the DC induced by geomagnetically-caused ground-induced currents in the transmission line.
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