Results 151 to 160 of about 1,041,598 (189)

Protection coordination of directional overcurrent relays considering fault current direction

IEEE PES Innovative Smart Grid Technologies, Europe, 2014
Directional inverse time overcurrent relays are used in protection systems of meshed networks to operate for fault currents in its forward zone of operation. They are used for primary and backup protection and their operation needs to be coordinated to assure selectivity.
Hebatallah Mohamed Sharaf, H. H. Zeineldin, Doaa Khalil Ibrahim, Essam El Din Abo El Zahab   +3 more
openaire   +1 more source

Enhanced differential evolution algorithm for coordination of directional overcurrent relays

Electric Power Systems Research, 2017
Abstract This paper presents an enhanced differential evolution algorithm (DE) for solving the directional overcurrent relay (DOCR) coordination problem. Comparisons among different versions of DE for coordination of DOCRs in larger and interconnected power systems are presented.
Meng Yen Shih, Arturo Conde Enriquez
exaly   +2 more sources

Optimum coordination of directional overcurrent relays in presence of distributed generation

2015 International Conference on Electrical, Electronics, Signals, Communication and Optimization (EESCO), 2015
Distributed generation (DG) is commonly used to supply the local loads. The penetration of distributed generation leads to violate the relay coordination in distribution network. This paper presents the implementation of a fault current limiter (FCL) to limit the fault current contribution from DG, and thus restore the protection coordination.
Amol A Kalage, Nitin D Ghawghawe
openaire   +1 more source

Coordination of Directional Overcurrent Relay Using PSO-DE Algorithm

2021 International Conference on Technology and Policy in Energy and Electric Power (ICT-PEP), 2021
A 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. Preserving an operation of a power system on its operating point depends on its protection system scheme.
Handy Agung Tresnadi, Teguh Aryo Nugroho, Muhammad Abdillah, Nita Indriani Pertiwi   +3 more
openaire   +1 more source

Optimal coordination of microprocessor based directional overcurrent relays

2008 Canadian Conference on Electrical and Computer Engineering, 2008
The paper presents a new problem formulation for coordinating microprocessor based directional overcurrent relays in an interconnected power system. Unlike previous formulations, the proposed problem formulation takes into account the discrete nature of pickup current settings and the available time-current characteristics of the relay.
openaire   +1 more source

A Modified Particle Swarm Optimizer for the Coordination of Directional Overcurrent Relays

IEEE Transactions on Power Delivery, 2007
The coordination of directional overcurrent relays (DOCR) is treated in this paper using particle swarm optimization (PSO), a recently proposed optimizer that utilizes the swarm behavior in searching for an optimum. PSO gained a lot of interest for its simplicity, robustness, and easy implementation.
Mohamed M. Mansour, Said F. Mekhamer, Nehad El-Kharbawe   +2 more
openaire   +1 more source

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.
openaire   +1 more source

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 ...
openaire   +1 more source

Coordination of directional overcurrent relay timing using linear programming

IEEE Transactions on Power Delivery, 1996
A successive linear programming methodology is presented to treat more effectively those applications where a local structure change is performed to a power system already in operation, and where the modification of the settings of already existent relays is not desirable. The dimension of the optimization problems to be solved is substantially reduced,
A.J. Urdaneta, H. Restrepo, S. Marquez, J. Sanchez   +3 more
openaire   +1 more source

Application of Random Search Technique in Directional Overcurrent Relay Coordination

International Journal of Emerging Electric Power Systems, 2006
Recently, using a non-linear programming method authors have demonstrated that based on certain criteria if some non-significant selectivity constraints are relaxed, all remaining constraints happen to be feasible but the solution of coordination problem is not possible with the conventional objective function as optimization procedure leaves the ...
Dinesh Birla, Rudra Prakash Maheshwari, Hari Om Gupta, Kusum Deep, Manoj Thakur   +4 more
openaire   +1 more source