Identification and estimation of equivalent area parameters using synchronised phasor measurements. Issue 4 (1st April 2014)

• Record Type: Journal Article
• Authors: Vahidnia, Arash; Ledwich, Gerard; Palmer, Edward; Ghosh, Arindam
• Is Part Of: IET generation, transmission & distribution. Volume 8:Issue 4(2014)
• Page Start: 697
• Page End: 704
• Publication Date: 2014-04-01
• Subjects: oscillations -- parameter estimation -- power system stability -- phasor measurement; ten‐machine system -- meshed networks -- noninter‐area modes -- two‐area system -- equivalent area angles estimation -- nonlinear Kalman estimator -- inter‐area disturbances -- generators -- inter‐area oscillations -- power systems -- nonlinear area‐based equivalent model -- synchronised phasor measurements -- equivalent area parameter identification -- equivalent area parameter estimation; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/iet-gtd.2013.0285
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract : A new approach is proposed for obtaining a non‐linear area‐based equivalent model of power systems to express the inter‐area oscillations using synchronised phasor measurements. The generators that remain coherent for inter‐area disturbances over a wide range of operating conditions define the areas, and the reduced model is obtained by representing each area by an equivalent machine. The parameters of the reduced system are identified by processing the obtained measurements, and a non‐linear Kalman estimator is then designed for the estimation of equivalent area angles and frequencies. The simulation of the approach on a two‐area system shows substantial reduction of non‐inter‐area modes in the estimated angles. The proposed methods are also applied to a ten‐machine system to illustrate the feasibility of the approach on larger and meshed networks.