Coherency Theory: An Excellent Reference on the Subject [Book Review]

This book is a timely monograph that focuses on the theme of power system coherency. Today, coherency is becoming an even more attractive topic in power systems thanks to the increasing need for realtime power system situational awareness using wide-area synchrophasor measurements. The book covers: 1) a summary of the original coherency and aggregation procedure and slow coherency theory, 2) recent applications of linear model reduction methods for power systems, 3) other methods for obtaining nonlinear reduced power system models, e.g.,by artificial neural networks (ANNs), 4) application of synchrophasor measurements to create reduced-order models, and 5) tracing of interarea modes, i.e., phenomena of coherency.