Optimization Of Current Magnitude Estimators Based On Marquardt-Levenberg Algorithm

• Autorzy: Łukowicz M. , Solak K. , Wicher P. , Wiecha B.
• Języki publikacji: EN

Abstrakty

EN

Digital filtering, correlation methods, time delay methods, signal differentiation are the most commonly used methods of estimating fundamental frequency orthogonal components utilized in magnitude estimators. The foundation for designing filters used in aforementioned methods are usually demanded frequency responses or signal models with their parameters to be estimated. A weak point of both approaches is frequency-domain modelling ignoring time-domain performance of the magnitude estimators. In order to fulfil the requirements of protection with the optimum speed for many different configurations, operating conditions and construction features of power systems, it is necessaiy to develop magnitude estimator design methods aimed at modelling with respect to highspeed response with simultaneous acceptable estimation accuracy in the steady state. The article discusses the implementation of Levenberg-Marquardt algorithm to optimization of current magnitude estimators designed for power system protection with the focus on estimators used in instantaneous overcurrent relays. The paper presents details of optimizing algorithm, power system model used for acquisition of signal patterns and estimator performance analyzes.

Słowa kluczowe

EN

signal processing; digital filter; magnitude estimator; high speed overcurrent relay

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Present Problems of Power System Control
• Rocznik: 2016
• Tom: Nr 7
• Strony: 5--17
• Opis fizyczny: Bibliogr. 2 poz., tab., rys.

Twórcy

autor

Łukowicz M.

• Wroclaw University of Science and Technology, Department of Electrical Power Engineering, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland

autor

Solak K.

• Wroclaw University of Science and Technology, Department of Electrical Power Engineering, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland

autor

Wicher P.

• Wroclaw University of Science and Technology, Department of Electrical Power Engineering, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland

autor

Wiecha B.

• Wroclaw University of Science and Technology, Department of Electrical Power Engineering, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland

Bibliografia

• [1] MITRA S.K., KAISER J.F. (eds.), Handbook for Digital Signal Processing. John Wiley & Sons, Inc., New York 1993.
• [2] MARQUARDT D.W., An algorithm for least-squares estimation of nonlinear parameters, Journal of the Society for Industrial and Applied Mathematics, 1963, 11(2), 431-441.