METHOD OF INITIATING THE LOAD SHEDDING WITHIN AN ELECTRICAL POWER SYSTEM
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United States of America Patent
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Issued Date -
Nov 1, 2012
app pub date -
Dec 2, 2009
filing date -
Dec 2, 2009
priority date (Note) -
Abandoned
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Abstract
A method of initiating the load shedding within an electrical power system comprising an electricity generator with a source impedance ZS and a load impedance ZL, characterized in that the method comprises: measuring the voltage VL at the terminal of the load impedance, calculating by means of a computer a voltage operative level VOP such that: VOP=K VC, where K is a number greater than 1 and VC is a critical voltage at the terminals of the load ZL at which the ratio ZL/ZC is equal to 1, VC depending on the difference β between the phase angle θL of the load impedance ZL and the phase angle θS of the source impedance ZS, and comparing the voltage VL with the voltage operative level VOP so that the load shedding is initiated as soon as VL is equal to VOP.
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