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International Transactions on Electrical Energy Systems, Volume 2022, Issue 1, 2022., 2022 Protective relays in electric power grids recognize the types of electrical faults in a few seconds. The most common detection method to detect the types of electrical faults is based on measuring the angle between the zero and negative sequence currents.
Emilio C. Piesciorovsky +2 more
wiley +1 more source
Hybrid mixed-integer non-linear programming approach for directional over-current relay coordination
The Journal of Engineering, 2019 This article proposes the optimal coordination problem of protective relays within a hybrid optimisation framework which is presented based on integer coded genetic algorithm (ICGA) and non-linear programming (NLP).
Mohammad Sadegh Javadi +4 more
doaj +1 more source
Einstein's equations as a thermodynamic identity: The cases of stationary axisymmetric horizons and evolving spherically symmetric horizons [PDF]
, 2006 There is an intriguing analogy between the gravitational dynamics of the horizons and thermodynamics. In case of general relativity, as well as for a wider class of Lanczos-Lovelock theories of gravity, it is possible to interpret the field equations ...
Akbar +49 more
core +2 more sources
Optimal coordination of directional overcurrent relays using PSO-TVAC considering series compensation [PDF]
, 2015 The integration of system compensation such as Series Compensator (SC) into the transmission line makes the coordination of directional overcurrent in a practical power system important and complex.
Mahdad, Belkacem +2 more
core +2 more sources
On the gas content of transitional disks: a VLT/X-Shooter study of accretion and winds [PDF]
, 2014 Transitional disks (TDs) are thought to be a late evolutionary stage of protoplanetary disks with dust depleted inner regions. The mechanism responsible for this depletion is still under debate.
Benisty, M. +6 more
core +2 more sources
Optimal protection coordination of voltage-current time based inverse relay for PV based distribution system [PDF]
, 2017 Distributed energy resources (DERs) are electricity source generator to meet small scale electricity requirement. DER is gaining much importance nowadays due to its high efficiency and zero emission.
Sujatha, B.C., Tejeswini, M.V.
core +1 more source
Energies, 2019 In power systems protection, the optimal coordination of directional overcurrent relays (DOCRs) is of paramount importance. The coordination of DOCRs in a multi-loop power system is formulated as an optimization problem.
Abdul Wadood +5 more
doaj +1 more source
Can pulsed ultrasound increase tissue damage during ischemia? A study of the effects of ultrasound on infarcted and non-infarcted myocardium in anesthetized pigs [PDF]
, 2005 Background The same mechanisms by which ultrasound enhances thrombolysis are described in connection with non-beneficial effects of ultrasound. The present safety study was therefore designed to explore effects of beneficial ultrasound characteristics on
Göran K Olivecrona +54 more
core +1 more source
Complexity, 2018 This paper presents the solution of directional overcurrent relay (DOCR) problems using Simulated Annealing based Symbiotic Organism Search (SASOS). The objective function of the problem is to minimize the sum of the operating times of all primary relays.
Muhammad Sulaiman +3 more
doaj +1 more source
IEEE Access, 2019 The model of directional over current relays (DOCRs) coordination is considered as an optimization problem. It is generally formulated as linear programming (LP), non-linear programming (NLP) and mixed integer non-linear programming (MINLP), according to
Jiangtao Yu +2 more
doaj +1 more source