Uso de medições fasoriais na determinação de equivalentes para avaliação da estabilidade de tensão dos sistemas elétricos

Abstract

This master thesis addresses the use of a methodology for the analysis of power system voltage stability in real time operation. The basic philosophy of the methodology consists on the determination of network equivalents, based on phasor measurements of voltages and currents values, and on the calculation of a predictor index for voltage stability evaluation. The determination of a real time network equivalent is the core of the proposal. Among its innovative characteristics, it can be mentioned the acceleration process and the development of specific damping techniques for adjusting equivalent parameters. This work presents the studies related to network equivalent calculation. It includes practical results of applying the proposed methodology to a bus of the Brazilian Interconnected National System, checking for consistency in monitoring the performance of the electrical system.