Methods and systems for adaptive distance protection
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United States of America Patent
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Sep 13, 2016
Grant Date -
Sep 18, 2014
app pub date -
Mar 13, 2013
filing date -
Mar 13, 2013
priority date (Note) -
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Abstract
Systems and methods for adaptive distance protection are provided. An adaptive ground distance protection system may be installed in a power system to provide an accurate measurement of the apparent impedance of the transmission lines thereby ensuring reliable and stable operations of the power system. The potential of a system ground in reference to the remote earth is measured and used in calculating the apparent impedance of a transmission line. An accurate assessment of the apparent impedance of a transmission line is therefore provided and reduces the risk of misoperation of relays. Existing protection systems of a power system may be augmented, for example, via a retrofitting process, to enhance reliability of the power system, reduce costs, reduce customer service interruption, and expand opportunities for deployment.
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