Results 131 to 140 of about 2,500 (192)
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Hybrid optimization algorithm for directional overcurrent relay coordination
2014 IEEE PES General Meeting | Conference & Exposition, 2014This work presents a method for directional overcurrent relay (DOR) coordination in a meshed power system by optimizing its operating time. The meshed power system is part of a Brazilian power transmission system, which has been evaluated via CAPE (Computer-Aided Protection Engineering) software for short circuit studies.
Fernando B. Bottura +4 more
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Coordination of Directional Overcurrent Relay Using PSO-DE Algorithm
2021 International Conference on Technology and Policy in Energy and Electric Power (ICT-PEP), 2021A power system network has dynamic and complex characteristics. The continuity of electricity supply to customer side from the generation in stable, secure, and reliable is being a top priority to be considered.
Handy Agung Tresnadi +3 more
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The Local Fit Method for Coordinating Directional Overcurrent Relays
IEEE Transactions on Power Delivery, 2016The problem of coordinating directional overcurrent relays in transmission and subtransmission systems requires an exhaustive analysis and treatment of a large amount of information. Existing methods face some drawbacks, such as the combinatorial explosion due to the large number of relays and possibilities of settings, the need to adjust inner ...
Danilo L. A. Negrao, Jose C. M. Vieira
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The evolutionary algorithm EPSO to coordinate directional overcurrent relays
10th IET International Conference on Developments in Power System Protection (DPSP 2010). Managing the Change, 2010The goal of this paper is to coordinate directional overcurrent relays using the Evolutionary Particle Swarm Optimization (EPSO) Algorithm. EPSO Algorithm has gained a lot of interest for its simplicity, robustness and easy implementation. Coordinate directional overcurrent relays on a meshed network deals with a large volume of data, with many ...
H. Leite, J. Barros, V. Miranda
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INTEGRATED SOFTWARE FOR OPTIMAL DIRECTIONAL OVERCURRENT RELAY COORDINATION
Electric Machines & Power Systems, 1994ABSTRACT This paper reports the development of fully integrated software for the optimal directional overcurrent relay coordination of interconnected power systems. Different software packages like load flow analysis, fault analysis, determination of backup/primary relay pairs, main relay coordination program, etc. have been integrated.
NASEER A. LAWAY, H. O. GUPTA
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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), 2004In 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 +2 more
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Modified water cycle algorithm for optimal direction overcurrent relays coordination
Applied Soft Computing, 2019Abstract The optimization model of Directional Over Current Relays (DOCRs) coordination is considered non-linear optimization problem with a large number of operating constraints. This paper proposes a modified version for Water Cycle Algorithm (WCA), referred to as MWCA to effectively solve the optimal coordination problem of DOCRs. The main goal is
Ahmed Korashy +3 more
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International Journal of Green Energy
A microgrid’s fault current magnitude depends on its operational mode, specifically whether it is grid-connected or islanded. Typically, we deploy distinct protection schemes based on the fault current magnitude in a given mode.
Raghvendra Tiwari +3 more
semanticscholar +1 more source
A microgrid’s fault current magnitude depends on its operational mode, specifically whether it is grid-connected or islanded. Typically, we deploy distinct protection schemes based on the fault current magnitude in a given mode.
Raghvendra Tiwari +3 more
semanticscholar +1 more source
2021 IEEE International Conference on Automatic Control & Intelligent Systems (I2CACIS), 2021
Protective relays on any power system network must always operate correctly with minimum operating time to clear a fault. Until now, manual computations and curve-fitting techniques are still being used to coordinate relays on complex electrical grids ...
J. P. Félix +5 more
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Protective relays on any power system network must always operate correctly with minimum operating time to clear a fault. Until now, manual computations and curve-fitting techniques are still being used to coordinate relays on complex electrical grids ...
J. P. Félix +5 more
semanticscholar +1 more source
Improved group search optimization algorithm for coordination of directional overcurrent relays
Swarm and Evolutionary Computation, 2015Abstract In this study, coordination of directional overcurrent relays in power systems is formulated as an optimization problem. The objective is to find out an optimum setting of relays in order to minimize the operating time of relays for faults at their primary protection zone, while coordinating the relays properly. The coordination is performed
Manijeh Alipour +2 more
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