An Improved UFLS Scheme based on Estimated Minimum Frequency and Power Deficit

In the event of a power system disturbance, it is important that the decision to implement under frequency load shedding is based on both the minimum frequency and the magnitude of the disturbance. In this paper, we propose the use of higher order polynomial curve fitting to estimate the minimum fre...

Full description

Saved in:
Bibliographic Details
Published in2019 IEEE Milan PowerTech pp. 1 - 6
Main Authors Alhelou, Hassan Haes, Golshan, M.E.H., Zamani, R., Moghaddam, M. P., Njenda, Takawira C., Siano, Pierluigi, Marzband, Mousa
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2019
Subjects
Curve fitting
Disturbance estimation
Frequency estimation
frequency prediction
Frequency response
Load modeling
Mathematical model
polynomial curve fitting
Power system stability
under frequency load shedding
Online AccessGet full text

Cover

More Information
Summary:In the event of a power system disturbance, it is important that the decision to implement under frequency load shedding is based on both the minimum frequency and the magnitude of the disturbance. In this paper, we propose the use of higher order polynomial curve fitting to estimate the minimum frequency. If the prediction shows that the minimum frequency threshold will be violated, the magnitude of the total disturbance is estimated using the swing equation. In addition, the minimum amount of load that must be shed to restore the frequency just above the minimum value can also be directly calculated. Simulations are carried out for the considered Taiwan power system and the results prove the efficiency of the proposed technique.
DOI:10.1109/PTC.2019.8810497