Real Time Results with On-Line Network Equivalents for Control Center Applications

Extensive analysis and testing with real time data of the AEP system for various types of equivalencing techniques has been performed. It was found that for real time on-line applications the REI-type equivalents performed better than other equivalencing methods (Ward-type equivalents). It is shown that the equivalent updating procedure used for REI-type equivalents cannot be used for Ward-type equivalents. Ward-type equivalents which performed well for off-line planning applications and for some simulated real time applications did not work as well under realistic on-line conditions.