Results 11 to 20 of about 316,613 (266)

Grid Grounding Calculations for a 132-KV Substation Using Soil Backfilling

open access: yesIEEE Access, 2019
Safe and reliable grid design is complicated by the compact design of gas insulated substations (GIS). This paper discusses the complete grounding design procedure for a 132-KV substation in the city of Al Kharj based on the IEEE-80 specifications and ...
Saeed Alyami
doaj   +1 more source

Novel Bidirectional Isolated DC/DC Converter with High Gain Ratio and Wide Input Voltage for Electric Vehicle Storage Systems

open access: yesBatteries, 2022
This study proposes a novel bidirectional isolated DC/DC converter with a high gain ratio and wide input voltage for electric vehicle (EV) storage systems.
Yu-En Wu, Chen-Han Tai
doaj   +1 more source

Horizontal Electric Field in the Vicinity of Structures Hit by Lightning

open access: yesAtmosphere, 2016
The horizontal electric field at the ground surface in the vicinity of structures hit by lightning flashes is relevant to the safety of human beings and livestock; it determines the touch and step voltages around the structure.
Celio Fonseca Barbosa
doaj   +1 more source

Impact of step voltage parameters on accuracy of evaluating XLPE insulation DC voltage endurance coefficient

open access: yesIET Generation, Transmission & Distribution, 2023
The voltage endurance coefficient n of cross‐linked polyethylene (XLPE) insulation is an important indicator for the analysis of insulation failure mechanism.
Zhipeng Ma   +7 more
doaj   +1 more source

Reducing the Effect of Lightning on Step and Touch Voltages in a Grounding Grid Using a Nature-Inspired Genetic Algorithm With ATP-EMTP

open access: yesIEEE Access, 2019
This paper discusses the step and touch voltages, based on body resistance, in a grounding grid after a lightning strike at a 434-/21-kV substation. To ensure grounding grid safety, the maximum step and touch voltage should not exceed the safety criteria
Saeid Gholami Farkoush   +5 more
doaj   +1 more source

A High-Efficiency Low-Wearing Hybrid Voltage Regulator for Utility Applications

open access: yesIEEE Open Journal of Industry Applications, 2023
Step voltage regulator (SVR) has been utilized in power distribution systems for decades as the voltage regulation device. Due to the increasing integration of distributed energy resources, the conventional SVR is severely challenged by the modern power ...
Yafeng Wang, Tiefu Zhao
doaj   +1 more source

Voltage Clamping Circuits for Large Voltage Step-Down Coupled Inductor Converters

open access: yesRenewable Energy and Sustainable Development, 2019
Water desalination processes require power converters with large voltage step-down ratios and high efficiencies.  Coupled‑inductor (tapped-inductor) circuits can achieve this where the whole inductor carries current during one switch state but only part ...
Richard Pollock
doaj   +1 more source

A Coupled Inductor-Based Bidirectional DC-DC Converter with Step-Up Step-Down Operation for Electric Vehicle Applications

open access: yesInternational Transactions on Electrical Energy Systems, 2023
A coupled-inductor-based high step-up high step-down DC-DC converter with bidirectional capability suitable for electric vehicle (EV) applications is proposed in this paper.
Muhammad Zeeshan Malik   +5 more
doaj   +1 more source

A Novel Step-Up Converter with an Ultrahigh Voltage Conversion Ratio

open access: yesEnergies, 2018
A new step-up converter with an ultrahigh voltage conversion ratio is proposed in this paper. Two power switches of such a converter, which conduct synchronically, and its output voltage, which has common ground and common polarity with its input voltage,
Faqiang Wang   +2 more
doaj   +1 more source

Influence of moisture in step-voltage measurements of PVDF

open access: yesJournal of Physics D: Applied Physics, 1992
Step-voltage current measurements carried out with commercial poly(vinylidene fluoride) (PVDF) under vacuum showed a prominent peak in the charging current when a sample had previously been in contact with a humid environment. This effect tends to disappear in subsequent measurements performed under the same experimental conditions, giving evidence ...
Faria, R. M., Nogueira, J. S., Alves, N.
openaire   +3 more sources

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