Evaluación de coherencia entre generadores del SNI empleando mediciones sincrofasoriales

Abstract

In this work the information registered by the Wide Area Measurement System (WAMS), based on Synchrophasor Measurement Units (PMUs), is used to determine and evaluate the dynamic coherency among the generators of the Ecuadorian National Interconnected System. From the time series obtained, such as frequency signals, derivative of the frequency, voltage or current phasor, data mining techniques are applied to determine the groups of existing coherent generators both offline, for post-operative analysis, as in real time for the control and supervision of the system. For the evaluation of the groups obtained, validation indices are used for measuring the quality of the groupings, depending on the density of the data within the same group or the distance between different groups. This process is carried out in order to obtain the optimal number of coherent groups. The implementation of this entire procedure is carried out through a graphical interface developed in the App Designer of the MATLAB software, which allows loading a database with the measured signals, cleaning or preprocessing it if necessary, determine and evaluate the groups of coherent generators and present the results obtained in each of these stages.