Power system protection system
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United States of America Patent
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Aug 25, 2009
Grant Date -
Aug 23, 2007
app pub date -
Mar 16, 2004
filing date -
Mar 16, 2004
priority date (Note) -
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Abstract
A power system protection system prevents a voltage drop resulting from the reactive power characteristic of a power system. A main device for acquiring a system electric quantity of one or a plurality of upper substations detects a voltage drop resulting from the reactive power characteristic of the power system and transmits a detection signal of the voltage drop to a terminal device for acquiring a system electric quantity of one or a plurality of lower substations. Each terminal device sequentially sheds loads starting from those suffering more from the influence of the voltage drop resulting from the reactive power characteristic based on the load voltage and load current of a load bus.
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