| 摘要 |
In a method, computer program and system for estimating a state of an electric power transmission network, time-stamped phasor measurements are made by phasor measurement units ( 1 ) located at a first set of locations ( 11,12 ) throughout the network, and a plurality of voltage and/or current phasors at a second set of locations is estimated, where the locations of the first ( 11,12 ) and second sets of locations are distant from one another, and a status of network elements (L 4 ,L 5,13 ) that are remotely located from the phasor measurement units is inferred from the phasor measurements and the estimated phasors. In a preferred variant of the invention, the network elements are transmission lines (L 1 . . . L 8 ), switchgear, under load tap changing transformers, compensation devices ( 13 ) or FACTS devices, and the status information describes whether a network element (L 4 ,L 5,13 ) is electrically connected to or disconnected from the network.
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