Method and component for voltage instability protection in an electric power system

摘要

Voltage instability protection for an electric power system is implemented by determining a change in power injected into a region of interest within the electric power system based on synchronized power measurements from different power injection points of the region of interest, and by determining a change in power absorbed by one or more loads in the region of interest based on synchronized power measurements from different load points of the region of interest. A change in power loss for the region of interest is determined based on the difference between the change in power injected into the region of interest and the change in power absorbed by the region of interest. A voltage instability condition is indicated when the change in power loss for the region of interest approximates the change in power injected into the region of interest.