Investigation of the adaptability of transient stability assessment methods to real-time operation

Weckesser, Tilman; Jóhannsson, Hjörtur; Sommer, Stefan; Østergaard, Jacob

doi:10.1109/isgteurope.2012.6465835

Cited by 17 publications

(13 citation statements)

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“…In [9], results from a test of a new algorithm computing the information needed for carrying out aperiodic rotor angle stability show that the stability conditions of 1325 generators in a 7917 bus system can be determined in approximately 2 ms, thereby forming the base for real-time assessment of large systems in the millisecond range. The results in [9], are expected to support an effective adaption of existing offline methods for dynamic security assessment to real-time operation [10]. The short assessment times enables fast assessment of the system security where N-1 post fault snapshots could be used to quickly determine whether a given contingency would cause aperiodic rotor angle instability.…”

Section: Application Example Of Wide Area Monitoringmentioning

confidence: 87%

System security assessment in real-time using synchrophasor measurements

Jóhannsson

Wache

2013

IEEE PES ISGT Europe 2013

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-The increasing amount of renewable power from wind and solar generation causes higher fluctuation in power generation and in general increased distances between generation and load. Both aspects influence the system stability of electricity transmission in a negative way. Therefore, additional measures to ensure stable and secure operation of the system are necessary. Time stamped synchrophasor measurements lay the foundation for development of new realtime applications for security and stability assessment. The paper provides overview of existing solutions for synchrophasor based security assessment and sheds light on ongoing research activities that focus on exploiting wide-area synchrophasor measurements for real-time security assessment of sustainable power systems. At last, an mathematical mapping enabling informative visualization of the system state in respect to aperiodic rotor angle stability is described and analyzed in detailed.

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Section: Application Example Of Wide Area Monitoringmentioning

confidence: 87%

System security assessment in real-time using synchrophasor measurements

Jóhannsson

Wache

2013

IEEE PES ISGT Europe 2013

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“…The proposed method could be part of an extensive DSA toolbox and builds on prior developed approaches based on SIME, which was chosen since in [15] it was identified as being the fastest direct transient stability assessment (TSA) method. In this paper, four contributions are presented.…”

Section: Introductionmentioning

confidence: 99%

An Improved On-line Contingency Screening for Power System Transient Stability Assessment

Weckesser

Jóhannsson

Glavić

et al. 2017

Electric Power Components and Systems

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This paper presents a contingency screening method and a framework for its on-line implementation. The proposed method carries out contingency screening and on-line stability assessment with respect to first-swing transient stability. For that purpose, it utilizes the single machine equivalent method and aims at improving the prior developed contingency screening approaches. In order to determine vulnerability of the system with respect to a particular contingency, only one time-domain simulation needs to be performed. An early stop criteria is proposed so that in a majority of the cases the simulation can be terminated after a few hundred milliseconds of simulated system response. The method's outcome is an assessment of the system's stability and a classification of each considered contingency. The contingencies are categorized by exploiting parameters of an equivalent one machine infinite bus system. A novel island detection approach, appropriate for an on-line application since it utilizes efficient algorithms from graph theory and enables stability assessment of individual islands, is also introduced. The New England and New York system as well as the large-scale model of the Continental-European interconnected system are used to test the proposed method with respect to assessment accuracy and computation time.

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“…With more frequent and coherent sets of measurements it becomes feasible to consider adaptability of assessment methods using Thevenin equivalent representation to realtime operation as discussed in [6] and [7].…”

Section: Introductionmentioning

confidence: 99%