A Comprehensive Program For Computing Coherency-based Dynamic Equivalents

Abstract

This paper describes the method and associated computer programs for calculating dynamic equivalents of large synchronously interconnected systems. Tests of the method have been performed on large scale representations of both the Eastern U.S. (1159 generators, 5838 buses) and Western U.S. (337 generators, 1308 buses) interconnected systems. The method is highly efficient and is capable of developing dynamic equivalents which provide significant reductions in system model size while maintaining acceptable accuracy.