| 摘要 |
<p>In a method and devices for assessing the stability of an electric power network, for each of a plurality of measurement locations with associated voltage and current measurements, a normalized power margin value dSn is computed, which is defined as a result of dividing an associated power margin value by an associated maximum allowable power flow. In a preferred embodiment of the invention, the normalised power margin value dSn is computed from an apparent load impedance Za and a Thévenin impedance Zt, that are perceived from the measurement location, as <DF>dSn = <SQUARE>Za-Zt DIVIDED Za+Zt</SQUARE>. </DF> Normalised power margin values from several measurement locations in the network therefore show power margins relative to a local maximum capacity, which makes them comparable to one another. <IMAGE></p> |
