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Dynamic equivalent state estimation for multi-area power systems with synchronized phasor measurement units
journal contributionposted on 2018-08-03, 00:00 authored by A Vahidnia, G Ledwich, Edward PalmerEdward Palmer, A Ghosh
This paper proposes a new approach for state estimation of angles and frequencies of equivalent areas in large power systems with synchronized phasor measurement units. Defining coherent generators and their correspondent areas, generators are aggregated and system reduction is performed in each area of inter-connected power systems. The structure of the reduced system is obtained based on the characteristics of the reduced linear model and measurement data to form the nonlinear model of the reduced system. Then a Kalman estimator is designed for the reduced system to provide an equivalent dynamic system state estimation using the synchronized phasor measurement data. The method is simulated on two test systems to evaluate the feasibility of the proposed method.
Number of Pages7
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External Author AffiliationsQueensland University of Technology