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Analysis of power system oscillations for developing synchrophasor data applications
KTH, School of Electrical Engineering (EES), Electric Power Systems.ORCID iD: 0000-0002-4125-1055
2010 (English)In: Bulk Power System Dynamics and Control (iREP) - VIII (iREP), 2010 iREP Symposium, IEEE , 2010, 1-17 p.Conference paper (Refereed)
Abstract [en]

Electromechanical modes are predominantly determined by the machine rotor angles and speeds, and as a result, they provide the best visibility of such modes. These electromechanical modes are also observable in the network variables such as voltages and line currents, which are measured by PMUs. In this paper, by analyzing the electromechanical modes in the network variables, we can trace the propagation of electromechanical oscillations in the power network following a disturbance. In large power networks with multiple transfer paths across the interconnection it is not always clear how and where the oscillations propagate. Here, we seek to provide a rationale explaining how (the qualitative behavior) and where (transmission lines) network oscillations propagate. We first analyze the oscillations from real PMU data originating from a system-wide disturbance. Applying eigenvalue and sensitivity analysis we provide an analytical framework to understand the nature of the network oscillations. Closed-form expressions for the network sensitivities are provided. The results here important for building reduced models to assess transient stability and the selection of network variables as input signals to damp inter-area mode oscillations.

Place, publisher, year, edition, pages
IEEE , 2010. 1-17 p.
Keyword [en]
PMU;closed-form expression;eigenvalue analysis;electromechanical modes;electromechanical oscillation;interarea mode oscillation damping;line current;machine rotor angle;network variable;power network disturbance;power system oscillation analysis;sensitivity analysis;synchrophasor data application;system-wide disturbance;transient stability;damping;eigenvalues and eigenfunctions;electromagnetic oscillations;oscillations;power system interconnection;power system transient stability;power transmission faults;rotors;
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:kth:diva-63343DOI: 10.1109/IREP.2010.5563289ScopusID: 2-s2.0-77958026099ISBN: 978-1-4244-7466-0OAI: diva2:482033
iREP Symposium Bulk Power System Dynamics and Control (iREP) - VIII (iREP), August 1-6, 2010, Buzios, RJ, Brazil
© 2010 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. QC 20120202Available from: 2012-02-02 Created: 2012-01-23 Last updated: 2012-02-02Bibliographically approved

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Vanfretti, Luigi
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