METHODS AND APPARATUS FOR DETECTION OF TRANSIENT INSTABILITY AND OUT-OF-STEP CONDITIONS BY STATE DEVIATION
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United States of America Patent
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Mar 24, 2016
app pub date -
May 6, 2014
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May 6, 2013
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Abstract
This application describes a state deviation technique for identifying transient instabilities in power systems. Such instabilities may result from disturbances such as external faults and power swing conditions. Detection of transient instabilities is based on the direction of change of phase angle of a machine such as a generator at an equilibrium point. Method and apparatus as disclosed may also be used for assessing system-wide transient stability of a power system or portion thereof.
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