Results 1 to 10 of about 89,403 (169)

Coordination via a relay

2012 IEEE International Symposium on Information Theory Proceedings, 2012
In this paper, we study the problem of coordinating two nodes which can only exchange information via a relay at limited rates. The nodes are allowed to do a two-round interactive two-way communication with the relay, after which they should be able to ...
Aref, Mohammad Reza, Gohari, Amin, Haddadpour, Farzin, Yassaee, Mohammad Hossein   +3 more
core   +2 more sources

New Method for OC Relay Coordination [PDF]

Journal of Electrical and Computer Engineering, 2020
Protection relays design and manufacture have arrived to a new level of advancement; hence, numerical relays have appeared recently. They combine all the functions of monitoring, control, and protection in one device.
Ameer Aqeel Kamoona, Ahmed Najm alfadli, Israa Ali Alshabeeb   +2 more
doaj   +2 more sources

Enhanced fault protection coordination in wind-solar distribution grids utilizing improved hyper spherical search based optimization [PDF]

Scientific Reports
The incorporation of renewable energy sources (RES) into distribution networks presents considerable hurdles for protective relay coordination due to variable fault currents and swiftly altering operational conditions.
Shanti Swarup Rath, Prakash K. Ray, Gayadhar Panda, Asit Mohanty, Reji Kumar Rajamony, Javed Khan Bhutto, Hadi Hakami, Haiter Lenin Allasi   +7 more
doaj   +2 more sources

Comparative study of heuristic algorithms for coordination of industrial over current relays with nonstandard characteristics in microgrid protection [PDF]

Scientific Reports
The traditional methods for over-current relay coordination (OCR) may not be adequate to ensure consistent and dependable operation of microgrid (MG), in its various operating modes.
Ekta Gairola, Mahiraj Singh Rawat, Padmanabh Thakur, Sandeep Gupta, Mukesh Kumar   +4 more
doaj   +2 more sources

Effect of non standard characteristics of overcurrent relay on protection coordination and maximizing overcurrent protection level in distribution network

Alexandria Engineering Journal, 2022
This research employs the capabilities of 7SJ602 model (overcurrent and earth fault relay) for better performance and faster response. The Semiens 7SJ602 model is connected to the real radial system of an Egyptian Substation to protect the feeder ...
Abdallah Reda, Amal F. Abdelgawad, Mohamed Ibrahim   +2 more
doaj   +1 more source

Optimal Coordination of Directional Overcurrent Relays for Microgrids Using ‎Hybrid Interval Linear Programming - Differential Evolution [PDF]

Journal of Operation and Automation in Power Engineering, 2022
The relay coordination problem of directional overcurrent has  been an  active research issue in distribution networks and power transmission. In general, the problem of relay coordination is the nonlinearity of the optimization problem, which increases ...
P. Omidi, S. Abazari, S.M. Madani
doaj   +1 more source

Protection Coordination Index Assessment Using Fuzzy Logic Controller

Energies, 2022
This paper proposes the assessment method of the protection coordination index (PCI) for overcurrent protection relay and upstream relay. The protection coordination index is an indicator of how properly the equipment is protected by protective relay ...
Choong-Koo Chang, Ahmed Mohamed Elmashtoly   +1 more
doaj   +1 more source

Coordination of adaptive distance protection in transmission and wind farm collector lines under resistive fault conditions [PDF]

International Journal of Industrial Electronics, Control and Optimization, 2020
Distance relays calculate the path impedance between the fault point and the relay location by sampling the voltage and current at the relay location. By using the ratio of the impedance estimated by the relay to the impedance of the line where the relay
Jamshid Barati, Seidghodratollah Seifossadat, Mahmood Joorabian   +2 more
doaj   +1 more source

Optimal overcurrent relay coordination for interconnected power systems: A proper approach and improved technique

e-Prime: Advances in Electrical Engineering, Electronics and Energy, 2023
The optimum setting of directional overcurrent relays (DOCRs) is required to avoid miscoordination and avail fast response. To fulfill these requirements, it is required to prefer optimization techniques and modifications in objective functions (OF ...
Shanker D. Godwal, Kartik S. Pandya, Santosh C. Vora, Chintan R. Mehta, Vipul R. Rajput   +4 more
doaj   +1 more source

An Adaptive Centralized Protection and Relay Coordination Algorithm for Microgrid

Energies, 2023
To meet the increased customer demands, microgrid evolved. The structure of microgrid changes dynamically due to the intermittent nature of renewable-based generation, status of the distributed generator and opening of breakers for fault/maintenance ...
Regin Bose Kannaian, Belwin Brearley Joseph, Raja Prabu Ramachandran   +2 more
doaj   +1 more source