Results 1 to 10 of about 841,302 (182)

Study of the Prevention Method of ±800 kV Transmission Tower Foundation Deviation

open access: yesEnergies, 2023
The stability of transmission tower bases is key to ensuring the safe operation of power lines. This paper proposes a joint displacement-control technique for foundation-inclined piles and prestressed foundation tie beams to address the problem of tower ...
Xinsheng Dong   +5 more
doaj   +2 more sources

Vibration characteristics of ± 800 kV converter transformers part Ⅱ: Under load conditions

open access: yesInternational Journal of Electrical Power & Energy Systems
As the second part of the investigation on vibration characteristics of ± 800 kV converter transformers, this part focuses on load conditions. A full-load thermal stability test is carried out on 12 YY and YD converter transformers in a converter station.
Menghao Qian   +5 more
doaj   +2 more sources

Vibration characteristics of ±800 kV converter transformers part I: Under no-load conditions

open access: yesInternational Journal of Electrical Power & Energy Systems
For lack of study on the vibration characteristics of converter transformers, this paper studied the vibration signal analysis method and investigated the vibration characteristics of converter transformers during the commissioning of a ±800 kV converter
Menghao Qian   +5 more
doaj   +2 more sources

Analysis on Cost Structure and Investment Level of ±800 kV Converter Stations

open access: yes南方能源建设, 2020
[Introduction] The paper aims to study on the investment features of ±800 kV Converter Stations and provide guidance for the future constructions of ±800 kV Converter Stations in the field of project cost. [Method] By collecting data of design quantities,
SHEN An, DONG Jianmin, LI Luyang
doaj   +1 more source

Ventilatory constraint is more severe in walking than cycling in patients with COPD

open access: yesCurrent Research in Physiology, 2021
Due to its effectivity in assessing functional capacity and adding prognostic information to the staging of chronic obstructive pulmonary disease (COPD) patients, the 6-min walk test (6MWT) is extensively used in clinical evaluation.
Jan Chlumský, Ondřej Zindr
doaj   +1 more source

Investigation of Improved Thermal Dissipation of ±800 kV Converter Transformer Bushing Employing Nano-Hexagonal Boron Nitride Paper Using FEM

open access: yesIEEE Access, 2021
The heat dissipation factor of conventional epoxy impregnated paper bushings is a subject of concern due to the large quantities of power in a High Voltage Direct Current (HVDC) system.
Suman Yadav   +3 more
semanticscholar   +1 more source

Temperature‐dependent electric field distribution in ±800 kV valve‐side bushing insulation for a converter transformer

open access: yesHigh Voltage, 2020
National Natural Science Foundation of China, Grant/Award Number: 51537008; National Natural Science Foundation of China, Grant/Award Number: 51807136; National Natural Science Foundation of China, Grant/Award Number: 51807137; National Postdoctoral ...
B. Du   +4 more
semanticscholar   +1 more source

Ultrabroadband single-cycle terahertz pulses with peak fields of 300 kV cm$^{-1}$ from a metallic spintronic emitter [PDF]

open access: yes, 2017
To explore the capabilities of metallic spintronic thin-film stacks as a source of intense and broadband terahertz electromagnetic fields, we excite a W/CoFeB/Pt trilayer on a large-area glass substrate (diameter of 7.5 cm) by a femtosecond laser pulse ...
Jaiswal, S.   +7 more
core   +2 more sources

Predicting sonic pulse shapes of underwater spark discharges [PDF]

open access: yes, 1962
Measurements of the acoustic pressure of spark discharges were made at a shallow depth (10 feet) for various voltages, stored energies, inductances and capacitances of the system, and electrode areas.
Caulfield, David D.
core   +1 more source

Simulation Experiment on Discharge of Plastic Film Overlapping on UHVDC Transmission Lines

open access: yesZhongguo dianli, 2022
In order to study the discharge phenomena of plastic film overlapping on UHV DC transmission lines and explore the cause of flashover fault of a ± 800 kV UHV line, an experimental study is conducted on the flashover characteristics of plastic film with ...
Shenghui WANG   +3 more
doaj   +1 more source

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