Journal Article10.1049/IET-GTD.2014.0519
Critical clearing time estimation using synchrophasor data-based equivalent dynamic model
Avishek Paul,Nilanjan Senroy +1 more
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TL;DR: In this article, the authors proposed to use reduced order equivalents of the network around a critical tie line, to estimate the critical clearing time, and derived the reduced order model from synchrophasor data in real time, so as to replicate the most updated system dynamics.
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Abstract: A critical aspect of online dynamic security assessment is the ranking of probable contingencies based on the critical clearing time. Ordinarily critical clearing time involves simulation of contingencies requiring extensive computational resources and updated network data. This study proposes to use reduced order equivalents of the network around a critical tie line, to estimate the critical clearing time. It is proposed to derive the reduced order model from synchrophasor data in real time, so as to replicate the most updated system dynamics. The stability margins in the reduced order model and the original detailed model are correlated using a transient energy function that considers the kinetic and potential energy gained by any system during a fault. It is shown that it is possible to arrive at a relatively accurate estimate of the critical clearing time of a contingency in the detailed model, using the equivalent model obtained using synchrophasors data.
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Citations
Real-Time Monitoring of Post-Fault Scenario for Determining Generator Coherency and Transient Stability Through ANN
TL;DR: In this article, a new method is proposed to determine the real-time transient stability status and identification of the coherent generator groups by predicting the rotor angle values following a large disturbance through radial basis function neural network.
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Transient Stability of Power Grids Comprising Wind Turbines: New Formulation, Implementation, and Application in Real-Time Assessment
TL;DR: The simulation results show that the proposed real-time method calculates the critical clearing time of wind turbine generators with notable precision and very good speed, and consequently, it is sufficient for transient stability assessment of power grids comprising wind turbines.
41
Sensitivity-based approach for real-time evaluation of transient stability of wind turbines interconnected to power grids
TL;DR: An innovative and high-precision real-time method based on the transient energy function (TEF) which aims to evaluate the TS of power system in the presence of wind turbines and demonstrates the efficiency and also comprehensiveness of the proposed method in calculation of critical clearing time and TS assessment.
28
Probabilistic framework for transient stability contingency ranking of power grids with active distribution networks: Application in post disturbance security assessment
Mohsen Tajdinian,Mehdi Allahbakhshi,Mostafa Mohammadpourfard,Behnam Mohammadi,Yang Weng,Zhao Yang Dong +5 more
TL;DR: This paper aims to investigate transient stability contingency ranking in power grids considering the uncertainties raised by DERs of active distribution networks with probabilistic transient stability prediction framework, in which the probability density function of transient stability condition is calculated based on the normalized stability indicators.
20
Model free graphical index for transient stability limit based on on-line single machine equivalent system identification
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16
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