Monitoring an electrical power supply network
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United States of America Patent
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Oct 31, 2017
Grant Date -
Jan 8, 2015
app pub date -
Feb 29, 2012
filing date -
Feb 29, 2012
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Abstract
A method and a device are provided for monitoring an electrical power supply network. A temporal frequency change value is determined for at least two sections or for at least two points of the power supply network. The frequency change value indicates the respective temporal frequency change of the network frequency. A conclusion is drawn regarding a possible islanding within the power supply network, and a warning signal which indicates the possible islanding within the power supply network is generated when the difference between the frequency change values, exceeds a predetermined frequency change threshold value.
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