Title: Improved rotor angular speed measurement : a key for proper power grid stabilization
Authors : Baechle, M.
Knazkins, Valerijs
Larsson, M.
Korba, Petr
Proceedings: PES General Meeting | Conference & Exposition, 2014 IEEE
Conference details: IEEE Power & Energy Society, General Meeting 2014, National Harbor, MD, USA, July 27-31, 2014
Publisher / Ed. Institution : IEEE
Issue Date: 2014
License (according to publishing contract) : Licence according to publishing contract
Type of review: Not specified
Language : English
Subjects : Rotors; Estimation; Shafts; Frequency measurement; Power system stability; Damping; Oscillators
Subject (DDC) : 621.04: Energy engineering
Abstract: This paper is presents a new Extended Kalman filter-based method for the estimation of the rotor angular speed of a synchronous machine. The main utility of the estimated speed is in the power system stabilizer. The paper briefly reviews the problems associated with the existing methods for reliable and accurate rotor speed measurement or estimation. It is shown, that the existing methods of rotor speed estimation have some severe drawbacks and may cause the power system stabilizer to produce negative damping over a specific frequency range, when an inaccurate rotor speed signal is used as the input to the power system stabilizer. The new rotor speed estimation method was implemented on an industrial control platform and integrated in a modern digital excitation system. A series of hardware-in-the-loop simulations were run to examine the properties of the new speed estimator. The simulations confirm that the new speed offers superior performance in terms of speed estimation accuracy which allows the proper damping of oscillations over a frequency range of interest.  
Departement: School of Engineering
Organisational Unit: Institute of Energy Systems and Fluid Engineering (IEFE)
Publication type: Conference Paper
DOI : 10.1109/PESGM.2014.6939533
ISBN: 978-1-4799-6415-4
ISSN: 1932-5517
URI: https://digitalcollection.zhaw.ch/handle/11475/1766
Appears in Collections:Publikationen School of Engineering

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