Abstract
A computer program that calculates the steady-state voltages, phase angles, and shaft phases from measured power flows has been written. The weighted difference between measured power flows and computed power flows was a scalar error that was minimized using a modified Newton's method and a second-order method. The admittance matrix was revised following a system change, and the changes in shaft phases were calculated for control purposes. In the event that the power flows were not balanced or the system was unstable, optimum spinning reserve allocation and load shedding was calculated. New algorithms for fast ac load flows were developed.
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