Optimal Coordination of Dual-Setting Directional Overcurrent Relays in Microgrids

Tareq Foqha; Samer Alsadi; Shady S. Refaat

doi:10.1109/SGRE59715.2024.10429000

Optimal Coordination of Dual-Setting Directional Overcurrent Relays in Microgrids

Tareq Foqha, Samer Alsadi, Shady S. Refaat

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Microgrids are gaining popularity due to their improved reliability and resilience. However, their protection is challenging due to bidirectional current flow and varying fault current levels in different operating modes. This paper proposes the use of dual-setting directional overcurrent relays for microgrid protection. To demonstrate their effectiveness, a comparative analysis of dual-setting relays and conventional relays is conducted. The relay coordination problem is formulated as a nonlinear programming problem, and the settings of relays are optimally determined using genetic algorithm and an efficient hybrid optimization algorithm that combines the modified firefly algorithm and genetic algorithm to minimize the overall relay operating time for primary relays. The proposed scheme is implemented on the distribution section of the IEEE-14 bus system, demonstrating a reduction in total system operating time with dual-setting directional overcurrent relays.

Original language	English
Title of host publication	2024 4th International Conference on Smart Grid and Renewable Energy (SGRE)
Place of Publication	Doha, Qatar
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Pages	1-6
Number of pages	6
ISBN (Electronic)	979-8-3503-0626-2
ISBN (Print)	979-8-3503-0627-9
DOIs	https://doi.org/10.1109/SGRE59715.2024.10429000
Publication status	Published - 10 Jan 2024
Event	2024 4th International Conference on Smart Grid and Renewable Energy (SGRE) - Doha, Qatar Duration: 8 Jan 2024 → 10 Jan 2024 Conference number: 4 https://www.sgre-qa.org/

Conference

Conference	2024 4th International Conference on Smart Grid and Renewable Energy (SGRE)
Abbreviated title	SGRE 2024
Country/Territory	Qatar
City	Doha
Period	8/01/24 → 10/01/24
Internet address	https://www.sgre-qa.org/

Keywords

Microgrids
Smart grids
Relays
Standards
Optimization
Genetic algorithms
Resilience
Microgrid protection
Dual-setting directional overcurrent relays
Firefly algorithm

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10.1109/SGRE59715.2024.10429000Licence: Unspecified

Cite this

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title = "Optimal Coordination of Dual-Setting Directional Overcurrent Relays in Microgrids",

abstract = "Microgrids are gaining popularity due to their improved reliability and resilience. However, their protection is challenging due to bidirectional current flow and varying fault current levels in different operating modes. This paper proposes the use of dual-setting directional overcurrent relays for microgrid protection. To demonstrate their effectiveness, a comparative analysis of dual-setting relays and conventional relays is conducted. The relay coordination problem is formulated as a nonlinear programming problem, and the settings of relays are optimally determined using genetic algorithm and an efficient hybrid optimization algorithm that combines the modified firefly algorithm and genetic algorithm to minimize the overall relay operating time for primary relays. The proposed scheme is implemented on the distribution section of the IEEE-14 bus system, demonstrating a reduction in total system operating time with dual-setting directional overcurrent relays.",

keywords = "Microgrids, Smart grids, Relays, Standards, Optimization, Genetic algorithms, Resilience, Microgrid protection, Dual-setting directional overcurrent relays, Firefly algorithm",

author = "Tareq Foqha and Samer Alsadi and Refaat, {Shady S.}",

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Foqha, T, Alsadi, S & Refaat, SS 2024, Optimal Coordination of Dual-Setting Directional Overcurrent Relays in Microgrids. in 2024 4th International Conference on Smart Grid and Renewable Energy (SGRE). Institute of Electrical and Electronics Engineers (IEEE), Doha, Qatar, pp. 1-6, 2024 4th International Conference on Smart Grid and Renewable Energy (SGRE), Doha, Qatar, 8/01/24. https://doi.org/10.1109/SGRE59715.2024.10429000

Optimal Coordination of Dual-Setting Directional Overcurrent Relays in Microgrids. / Foqha, Tareq; Alsadi, Samer; Refaat, Shady S.
2024 4th International Conference on Smart Grid and Renewable Energy (SGRE). Doha, Qatar: Institute of Electrical and Electronics Engineers (IEEE), 2024. p. 1-6.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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T1 - Optimal Coordination of Dual-Setting Directional Overcurrent Relays in Microgrids

AU - Foqha, Tareq

AU - Alsadi, Samer

AU - Refaat, Shady S.

N1 - Conference code: 4

PY - 2024/1/10

Y1 - 2024/1/10

N2 - Microgrids are gaining popularity due to their improved reliability and resilience. However, their protection is challenging due to bidirectional current flow and varying fault current levels in different operating modes. This paper proposes the use of dual-setting directional overcurrent relays for microgrid protection. To demonstrate their effectiveness, a comparative analysis of dual-setting relays and conventional relays is conducted. The relay coordination problem is formulated as a nonlinear programming problem, and the settings of relays are optimally determined using genetic algorithm and an efficient hybrid optimization algorithm that combines the modified firefly algorithm and genetic algorithm to minimize the overall relay operating time for primary relays. The proposed scheme is implemented on the distribution section of the IEEE-14 bus system, demonstrating a reduction in total system operating time with dual-setting directional overcurrent relays.

AB - Microgrids are gaining popularity due to their improved reliability and resilience. However, their protection is challenging due to bidirectional current flow and varying fault current levels in different operating modes. This paper proposes the use of dual-setting directional overcurrent relays for microgrid protection. To demonstrate their effectiveness, a comparative analysis of dual-setting relays and conventional relays is conducted. The relay coordination problem is formulated as a nonlinear programming problem, and the settings of relays are optimally determined using genetic algorithm and an efficient hybrid optimization algorithm that combines the modified firefly algorithm and genetic algorithm to minimize the overall relay operating time for primary relays. The proposed scheme is implemented on the distribution section of the IEEE-14 bus system, demonstrating a reduction in total system operating time with dual-setting directional overcurrent relays.

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KW - Smart grids

KW - Relays

KW - Standards

KW - Optimization

KW - Genetic algorithms

KW - Resilience

KW - Microgrid protection

KW - Dual-setting directional overcurrent relays

KW - Firefly algorithm

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M3 - Conference contribution

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BT - 2024 4th International Conference on Smart Grid and Renewable Energy (SGRE)

PB - Institute of Electrical and Electronics Engineers (IEEE)

CY - Doha, Qatar

T2 - 2024 4th International Conference on Smart Grid and Renewable Energy (SGRE)

Y2 - 8 January 2024 through 10 January 2024

ER -

Optimal Coordination of Dual-Setting Directional Overcurrent Relays in Microgrids

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Keywords

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