Improvement of the Frequency Response Indicators by Optimal UFLS Scheme Settings

Conference paper (2020)

Authors

Martha N. Acosta Autonomous University of Nuevo León
Manuel A. Andrade Autonomous University of Nuevo León
E Vazquez Autonomous University of Nuevo León
Choidorj Adiyabazar National Dispatching Center Co. Ltd
Francisco Gonzalez-Longatt University of South-Eastern Norway
José L. Rueda Intelligent Electrical Power Grids - EEMCS
P. Palensky Intelligent Electrical Power Grids - EEMCS
Research Group
Intelligent Electrical Power Grids (EEMCS) (TU Delft)
Copyright: © 2020 Martha N. Acosta, Manuel A. Andrade, Ernesto Vázquez, Choidorj Adiyabazar, F. Gonzalez-Longatt, José L. Rueda, P. Palensky
DOI: https://doi.org/10.1109/ISIE45063.2020.9152466
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Published Date

2020

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electrical Sustainable Energy

Research Group

Intelligent Electrical Power Grids

Abstract

This research investigates the positive changes in the system frequency response indicators caused by the implementation of a set of optimal settings of an under-frequency load shedding (UFLS) scheme. The optimal under-frequency load shedding (UFLS) scheme is optimised by minimising the total amount of load shedding and taking into account the recovery process of the system frequency into its operational values after several losses of generation and satisfies the requirements of the under-frequency load shedding standard (PRC-006-SERC-02). The idea of implementing the optimal UFLS scheme is to identify how changes the minimum frequency, minimum time, rate of change of frequency and steady-state frequency when the amount of load shedding change. The optimal UFLS scheme formulation starts with identifying the variables to control with the optimisation and its respective bounds. Then, the objective function is formulated in terms of the total load shedding, and finally, the restrictions and requirements of the systems are written as inequality constraints. The optimal UFLS is evaluated in the IEEE 39-bus system. The simulations results demonstrate the suitability of the optimal UFLS to improve the frequency response indicators.

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