Wide-Area Assessment of Aperiodic Small Signal Rotor Angle Stability in Real-Time

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Abstract

This paper presents the details of a new real-time stability assessment method. The method assesses a particular mechanism of stability: each generator’s capability to generate sufficient steady state electromechanical torque. The lack of sufficient steady state torque causes aperiodic increase in rotor angle
and a loss of synchronism, referred to as aperiodic small signal instability. The paper provides the theoretical background of the method and an analytical assessment criterion. Furthermore, a mathematical mapping of the generators’ operating points that enables informative visualization of multiple operating points is derived in the paper. Finally, results from time-domain simulation of instability scenarios in the Nordic32 test system are presented
and results used for testing the assessment method. The results illustrate the method’s capability to efficiently identify the location of the emerging problem and to quantify margins to stability boundary.
Original languageEnglish
JournalIEEE Transactions on Power Systems
Volume28
Issue number4
Pages (from-to)4545-4557
ISSN0885-8950
DOIs
Publication statusPublished - 2013

Keywords

  • Power system measurements
  • Power system monitoring
  • Power system stability
  • Generators
  • Impedance
  • Real-time systems
  • Rotors
  • Stability analysis
  • Steady-state

Cite this

@article{84f145305f9945a4924a22793778b880,
title = "Wide-Area Assessment of Aperiodic Small Signal Rotor Angle Stability in Real-Time",
abstract = "This paper presents the details of a new real-time stability assessment method. The method assesses a particular mechanism of stability: each generator’s capability to generate sufficient steady state electromechanical torque. The lack of sufficient steady state torque causes aperiodic increase in rotor angleand a loss of synchronism, referred to as aperiodic small signal instability. The paper provides the theoretical background of the method and an analytical assessment criterion. Furthermore, a mathematical mapping of the generators’ operating points that enables informative visualization of multiple operating points is derived in the paper. Finally, results from time-domain simulation of instability scenarios in the Nordic32 test system are presentedand results used for testing the assessment method. The results illustrate the method’s capability to efficiently identify the location of the emerging problem and to quantify margins to stability boundary.",
keywords = "Power system measurements, Power system monitoring, Power system stability, Generators, Impedance, Real-time systems, Rotors, Stability analysis, Steady-state",
author = "Hj{\"o}rtur J{\'o}hannsson and Nielsen, {Arne Hejde} and Jacob {\O}stergaard",
year = "2013",
doi = "10.1109/TPWRS.2013.2271193",
language = "English",
volume = "28",
pages = "4545--4557",
journal = "I E E E Transactions on Power Systems",
issn = "0885-8950",
publisher = "Institute of Electrical and Electronics Engineers",
number = "4",

}

Wide-Area Assessment of Aperiodic Small Signal Rotor Angle Stability in Real-Time. / Jóhannsson, Hjörtur; Nielsen, Arne Hejde; Østergaard, Jacob.

In: IEEE Transactions on Power Systems, Vol. 28, No. 4, 2013, p. 4545-4557.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Wide-Area Assessment of Aperiodic Small Signal Rotor Angle Stability in Real-Time

AU - Jóhannsson, Hjörtur

AU - Nielsen, Arne Hejde

AU - Østergaard, Jacob

PY - 2013

Y1 - 2013

N2 - This paper presents the details of a new real-time stability assessment method. The method assesses a particular mechanism of stability: each generator’s capability to generate sufficient steady state electromechanical torque. The lack of sufficient steady state torque causes aperiodic increase in rotor angleand a loss of synchronism, referred to as aperiodic small signal instability. The paper provides the theoretical background of the method and an analytical assessment criterion. Furthermore, a mathematical mapping of the generators’ operating points that enables informative visualization of multiple operating points is derived in the paper. Finally, results from time-domain simulation of instability scenarios in the Nordic32 test system are presentedand results used for testing the assessment method. The results illustrate the method’s capability to efficiently identify the location of the emerging problem and to quantify margins to stability boundary.

AB - This paper presents the details of a new real-time stability assessment method. The method assesses a particular mechanism of stability: each generator’s capability to generate sufficient steady state electromechanical torque. The lack of sufficient steady state torque causes aperiodic increase in rotor angleand a loss of synchronism, referred to as aperiodic small signal instability. The paper provides the theoretical background of the method and an analytical assessment criterion. Furthermore, a mathematical mapping of the generators’ operating points that enables informative visualization of multiple operating points is derived in the paper. Finally, results from time-domain simulation of instability scenarios in the Nordic32 test system are presentedand results used for testing the assessment method. The results illustrate the method’s capability to efficiently identify the location of the emerging problem and to quantify margins to stability boundary.

KW - Power system measurements

KW - Power system monitoring

KW - Power system stability

KW - Generators

KW - Impedance

KW - Real-time systems

KW - Rotors

KW - Stability analysis

KW - Steady-state

U2 - 10.1109/TPWRS.2013.2271193

DO - 10.1109/TPWRS.2013.2271193

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JF - I E E E Transactions on Power Systems

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