Energies, 2021 In this paper, the authors have developed a hardware model for blocking even and odd harmonics of a power transformer. In the proposed hardware model, intelligent differential & over-current relays are used for the blocking of harmonics of a power ...
Abdul Azeem +4 more
doaj +1 more source
Operational control and protection implications of fault current limitation in distribution networks [PDF]
, 2009 Rising short-circuit fault current levels is one of the problems associated with the increased presence of distributed generation (DG) in electrical networks.
Blair, S.M. +3 more
core +3 more sources
Several Methods of Reducing Discharge Energy for Intrinsic Safety Power Supply
Meikuang Anquan, 2020 In order to reduce the discharge spark energy of the intrinsic safety power supply, several measures are proposed in this paper. When the over-current protection occurs, DC-DC or AC-DC module should be turned off as quickly as possible, and the ...
DONG Jianguo, LI Yanmin, ZHOU Xingdong, ZHANG Lei
doaj +1 more source
Optimal coordination of over-current relays in microgrids considering multiple characteristic curves
Alexandria Engineering Journal, 2021 Nowadays, microgrids play a significant role in the development of modern distribution networks (DNs). In this context, the ever increasing presence of renewable distributed generation (DG) in microgrids has imposed new challenges in protection ...
Sergio D. Saldarriaga-Zuluaga +2 more
doaj +1 more source
Design of protection module of intrinsic safety power supply based on LT4356
Gong-kuang zidonghua, 2014 In view of problems of simple protection function, low conversion efficiency, poor anti-interference ability and low intrinsic safety current existed in current protection module of intrinsic safety power supply, a protection module of intrinsic safety ...
XIE Guojun +3 more
doaj +1 more source
FBG-based fibre-optic current sensors for power systems protection : laboratory evaluation [PDF]
, 2009 Conventional differential current unit protection schemes rely on a pair of electronic protection relays that measure current phasors separately at the boundaries of the protected zone.
Niewczas, Pawel +3 more
core +3 more sources
Design analysis of mine-used intrinsic safety power supply
Gong-kuang zidonghua, 2014 In view of requirements that intrinsic safety power supply must has multi-protection of over-current and over-voltage, the paper introduced working principle of a circuit of mine-used intrinsic safety power supply based on LM317 regulator, analyzed ...
LIU Qi
doaj +1 more source
AC Microgrids Protection: A Digital Coordinated Adaptive Scheme
Applied Sciences, 2021 A significant challenge for designing a coordinated and effective protection architecture of a microgrid (MG) is the aim of an efficient, reliable, and fast protection scheme for both the grid-connected and islanded modes of operation.
Noor Hussain +6 more
doaj +1 more source
A novel chopping current protection circuit for intrinsically safe power supply
Gong-kuang zidonghua, 2016 For problems that traditional chopping current protection circuit had small cut-off current value and poor anti load impact ability, and needed additional recovery circuit or manual circuit after over-current fault, a novel chopping current protection ...
FANG Xupeng +4 more
doaj +1 more source
Current–time characteristics of resistive superconducting fault current limiters [PDF]
, 2012 Superconducting fault current limiters (SFCLs) may play an important role in power-dense electrical systems. Therefore, it is important to understand the dynamic characteristics of SFCLs.
Burt, Graeme +2 more
core +4 more sources