Results 181 to 190 of about 2,477 (219)

Optimal coordination of directional overcurrent relays

2018
The coordination between DOCRs is nonlinear and highly constrained optimization problem in which two settings, namely, TDS and PCS of each relay are considered as decision variables. The main objective is to minimize the sum of OTs of all the primary relays, which are expected to operate in order to clear the faults of their corresponding zones.
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Developing Directional Overcurrent Relay Without Voltage Input

With the rapidly increasing population and industrialization, the demand for electrical energy is constantly rising. This situation makes it inevitable to adopt new and innovative approaches in the production and distribution of electrical energy. In order to reduce dependence on traditional fossil fuel sources and minimize environmental impacts, there
ŞENYÜZ, Semih, BAYSAL, Mustafa, EVKAY, İbrahim   +2 more
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Optimized setting of directional overcurrent relays via genetic algorithm

2018 Simposio Brasileiro de Sistemas Eletricos (SBSE), 2018
The coordination of overcurrent relays in transmission systems plays an important role in ensuring a safe and reliable energy supply. This type of coordination requires a complex protection engineering study, thus demanding a great deal of time and non-optimized parameters, mainly in large-scale systems.
Luis A. P. Souza, Carlos L. B. Silva, Wesley P. Calixto   +2 more
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A novel problem formulation for directional overcurrent relay coordination

2004 Large Engineering Systems Conference on Power Engineering (IEEE Cat. No.04EX819), 2004
In general, directional overcurrent relays allow for continuous time dial settings but discrete pickup current settings. All previous work formulates the coordination problem either as a linear programming problem or as a nonlinear programming problem.
H. Zeienldin, E.F. El-Saadany, M.A. Salama   +2 more
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Optimal coordination of directional overcurrent relays using NSGA-II

Electric Power Systems Research, 2015
Abstract This paper presents a new method for coordination of directional overcurrent relays to reduce the discrimination time of the primary and backup relays, by using nondominated sorting genetic algorithm-II (NSGA-II). In order to achieve a reliable protective system, it is necessary to find a solution to avoid having large discrimination times ...
Zahra Moravej, Farhad Adelnia, Fazel Abbasi   +2 more
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Adaptive Protection Coordination Scheme Using Numerical Directional Overcurrent Relays

IEEE Transactions on Industrial Informatics, 2019
Dynamically changing distribution system operating conditions compromises the coordination of the existing protection schemes. This paper proposes an online adaptive protection coordination scheme by utilizing numerical directional overcurrent relays (DOCRs) and commercial A Mathematical Programming Language (AMPL) based Interior Point OPTimization ...
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Coordination of directional overcurrent relays using artificial bee colony

22nd International Conference and Exhibition on Electricity Distribution (CIRED 2013), 2013
This paper proposes to solve the coordination of directional overcurrent relays problem (DOCK) using Artificial Bee Colony optimization (ABC) which is robust and easily implemented. Three case studies were evaluated and implemented on looped 3-bus, 6-bus, and 8-bus systems. The obtained results from the proposed ABC algorithm is compared to those using
M. El-Mesallamy, W. El-Khattam, H. Talaat, A. Hassan   +3 more
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Optimization of Directional Overcurrent Relay Times Using C-SOMGA

2016
An important problem in electrical engineering is to determine the optimal directional overcurrent relay times. The problem is modeled as a constrained nonlinear optimization problem in which the decision variables are the devices that control the act of isolation of faulty lines from the system without disturbing the healthy lines.
Kusum Deep, Dipti Singh
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Directional overcurrent relay coordination optimization

2023
Meng Yen Shih, Arturo Conde, Jorge Chan González, Francisco Lezama Zárraga   +3 more
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Modeling Directional Overcurrent Relays using Modelica

2023 IEEE 3rd International Maghreb Meeting of the Conference on Sciences and Techniques of Automatic Control and Computer Engineering (MI-STA), 2023
Montaser. A. Qasem, Ali Dhaw Aljadi, Ezzedin Muftah Enbiah   +2 more
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