Probabilistic Under Frequency Load Shedding Considering RoCoF Relays of Distributed Generators

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Title: Probabilistic Under Frequency Load Shedding Considering RoCoF Relays of Distributed Generators
Authors: Amraee, Turaj
Darebaghi, Mohammad Ghaderi
Soroudi, Alireza
Keane, Andrew
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Date: 29-Dec-2017
Online since: 2019-04-04T09:45:38Z
Abstract: The activation of Under Frequency Load Shedding (UFLS) is the last automated action against the severe frequency drops in order to re-balance the system. In this paper, the setting parameters of a multistage load shedding plan are obtained and optimized using a discretized model of dynamic system frequency response. The uncertainties of system parameters including inertia time constant, load damping and generation deficiency are taken into account. The proposed UFLS model is formulated as a mixed integer linear programming optimization problem to minimize the expected amount of load shedding. The activation of Rate-of-Change-of-Frequency (RoCoF) relays as the anti-islanding protection of Distributed Generators (DGs) are considered. The MCS method is utilized for modeling the uncertainties of system parameters. The results of probabilistic UFLS are then utilized to design four different UFLS strategies. The proposed dynamic UFLS plans are simulated over the IEEE 39-bus and the large-scale practical Iranian national grid.
Funding Details: Science Foundation Ireland
Type of material: Journal Article
Publisher: IEEE
Journal: IEEE Transactions on Power Systems
Volume: 33
Issue: 4
Start page: 3587
End page: 3598
Copyright (published version): 2017 IEEE
Keywords: Under frequency load sheddingInertia time constantLoad dampingRoCoFUncertainty
DOI: 10.1109/TPWRS.2017.2787861
Language: en
Status of Item: Peer reviewed
Appears in Collections:Electrical and Electronic Engineering Research Collection

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