Results 21 to 30 of about 10,754 (285)

System configuration, fault detection, location, isolation and restoration: a review on LVDC Microgrid protections [PDF]

open access: yes, 2019
Low voltage direct current (LVDC) distribution has gained the significant interest of research due to the advancements in power conversion technologies. However, the use of converters has given rise to several technical issues regarding their protections
Bououden   +11 more
core   +1 more source

Tech Talk (12) Down to Earth: A Discussion of the General Requirements for the Earthing of Control and Instrumentation Systems

open access: yesMeasurement + Control, 2017
This paper addresses accepted practice for the earthing of control systems in a variety of environments and is intended to give control and instrument technicians and engineers a basic understanding of the power supply earthing systems to which their ...
David W Otterson
doaj   +1 more source

Safety assessment of high voltage substation earthing systems with synthetic geotextile membrane

open access: yesJournal of Mechatronics, Electrical Power, and Vehicular Technology, 2019
High voltage substations built within areas prone to vegetation or with unfavourable subgrade conditions are paved with the addition of punched geotextiles and non-conductive synthetic fabrics underneath switchyard surfacing.
Mostafa Nazih
doaj   +1 more source

Grounding System Adequacy of HV/MV Substations in Areas With Reduced Accessibility [PDF]

open access: yes, 2015
The adequacy of grounding systems has to be verified periodically in the operational time. With urban development and buildings growth adjacent to power systems as HV/MV substations, it is very rare to have area around with sufficient accessibility for ...
Farber, Alexander   +4 more
core   +1 more source

Effect of Earthing Enhancing Compound (EEC) on Improving Tower Footing Resistance of a 500 kV Tower in a Rocky Area

open access: yesApplied Sciences, 2021
This paper presents a comparative analysis of different earthing designs’ performances, with particular interest on the use of earthing enhancing compound (EEC) for a selected earthing design of 500 kV transmission towers in a rocky soil, using the ...
Nur Alia Farina Mohd Nasir   +7 more
doaj   +1 more source

Diagnosis of abnormal temperature rise observed on a 275 kv oil-filled cable surface: a case study [PDF]

open access: yes, 2019
This paper presents a case study on a 275 kV oil-filled cable. The condition assessment and diagnosis are based on analysis of cable surface temperature in relation to its current load and insulation dielectric loss.
Hepburn, Donald M.   +4 more
core   +1 more source

The treatment of thin wire and coaxial structures in lossless and lossy media in FDTD by the modification of assigned material parameters [PDF]

open access: yes, 2006
It has been shown recently that the use of modified assigned material parameters (MAMPs) within the finite-difference time-domain (FDTD) method provides a systematic, readily extensible, accurate, and efficient approach to the electromagnetic analysis of
Dumanli, S, Paul, DL, Railton, CJ
core   +2 more sources

Application of Copper Cladding Aluminum Composites in UHV Portable Earthing and Short-circuiting Wires

open access: yesMATEC Web of Conferences, 2018
Aiming at the heavy weight and inconvenience when carrying and installing copper earthing wires on the UHV transmission lines, in this paper, we present the use of copper clad aluminum(CCA) composite materials as a lightweight method for UHV earthing ...
Zhu Jianjun   +6 more
doaj   +1 more source

An equivalent circuit for the evaluation of cross-country fault currents in medium voltage (MV) distribution networks [PDF]

open access: yes, 2018
A Cross-Country Fault (CCF) is the simultaneous occurrence of a couple of Line-to-Ground Faults (LGFs), affecting different phases of same feeder or of two distinct ones, at different fault locations.
Gatta, Fabio Massimo   +3 more
core   +1 more source

Simplified conservative testing method of touch and step voltages by multiple auxiliary electrodes at reduced distance [PDF]

open access: yes, 2015
Grounding systems (GSs) must be tested periodically in order to maintain the touch voltage (TV) and step voltage (SV) below a safe value in all of the zones of the installation.
Araneo, Rodolfo   +4 more
core   +1 more source

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