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Sökning: WFRF:(Bombois S.) > Kungliga Tekniska Högskolan

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1.
  • Perić, V. S., et al. (författare)
  • Optimal multisine probing signal design for power system electromechanical mode estimation
  • 2017
  • Ingår i: Proceedings of the Annual Hawaii International Conference on System Sciences. - : IEEE Computer Society. - 9780998133102 ; , s. 3156-3164
  • Konferensbidrag (refereegranskat)abstract
    • This paper proposes a methodology for the design of a probing signal used for power system electromechanical mode estimation. Firstly, it is shown that probing mode estimation accuracy depends solely on the probing signal's power spectrum and not on a specific time-domain realization. A relationship between the probing power spectrum and the accuracy of the mode estimation is used to determine a multisine probing signal by solving an optimization problem. The objective function is defined as a weighting sum of the probing signal variance and the level of the system disturbance caused by the probing. A desired level of the mode estimation accuracy is set as a constraint. The proposed methodology is demonstrated through simulations using the KTH Nordic 32 power system model. 
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2.
  • Perić, Vedran S., et al. (författare)
  • Optimal Signal Selection for Power System Ambient Mode Estimation Using a Prediction Error Criterion
  • 2016
  • Ingår i: IEEE Transactions on Power Systems. - : Institute of Electrical and Electronics Engineers (IEEE). - 0885-8950 .- 1558-0679. ; 31:4, s. 2621-2633
  • Tidskriftsartikel (refereegranskat)abstract
    • This paper formulates an optimality criterion for the selection of synchrophasor signals to be used in ambient mode estimators. This criterion, which is associated with each measured signal and each dominant mode, is defined as the asymptotic variance of the corresponding estimated mode damping ratio. The value of the criterion is computed directly from an estimated autoregressive moving average (ARMA) model. Because the online computation of the defined criterion (for each measured signal in the system) may be computationally expensive, a fast pre-selection method for initial signal ranking is formulated. The pre-selection method is used to effectively determine a set of the candidate signals for which the formal criterion is evaluated in a second stage. The methodology is illustrated using synthetic measurements from the KTH Nordic 32 and the IEEE 39-bus test systems.
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Vanfretti, Luigi, 19 ... (2)
Bombois, Xavier (1)
Peric, Vedran S. (1)
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