Real time generator coherency evaluation via Hilbert transform and signals morphological similarity

The paper tackles the issue of evaluating in real time generator coherency through the employment of an adequate new measurement based algorithm. This algorithm combines Hilbert transform implemented via Boche method with a modified Bray-Curtis index. The first step ensures an inherent algorithm robustness against some Wide Area Monitoring Systems (WAMS) communication network effects. Numerical simulations performed on the IEEE 39 bus test system - New England - in the last part of the paper confirm the validity of the developed methodology, demonstrating furthermore the intrinsic regularizing action of the Hilbert transform against the data packet dropouts in WAMS.