Results 91 to 100 of about 24,218,867 (287)

Research on Nonlinear Variations of Frequency Domain Dielectric Characteristics of Typical Oil-paper Insulation Model

Journal of Harbin University of Science and Technology
Oil-paper insulation is the main insulation system for oil immersed power equipment. Accurately evaluating its aging status is crucial for the power grid operation and maintenance department to formulate maintenance strategies.
XU Minhu, ZHANG Jian, YANG Hongda, ZHANG Peng, LEI Shengjie, MA Chenyang, WANG Bingjie, ZHANG Mingze   +7 more
doaj   +1 more source

Performance assessment of a potential underground thermal storage facility: Case study of the closed mine Prosper‐Haniel in the Ruhr coal mining area in Germany

Deep Underground Science and Engineering, EarlyView.
This study demonstrates the feasibility of an underground closed‐loop thermal storage facility at a post‐mining site, intended for seasonal heat energy storage. Its principal design shows water flow directions in winter and summer (1, 2), heat pumps (3), an upper water reservoir (4), and connecting pipes (5).
Dmytro Rudakov, Oleksandr Inkin
wiley   +1 more source

Space Charge Behavior in Paper Insulation Induced by Copper Sulfide in High-Voltage Direct Current Power Transformers

Energies, 2015
The main insulation system in high-voltage direct current (HVDC) transformer consists of oil-paper insulation. The formation of space charge in insulation paper is crucial for the dielectric strength.
Ruijin Liao, Ende Hu, Lijun Yang, Yuan Yuan   +3 more
doaj   +1 more source

Nested Carbon Governance in Southeast Asia: Towards Just Nature‐Based Solutions?

Environmental Policy and Governance, EarlyView.
ABSTRACT Nature‐based solutions (NbS) have gained prominence as an integrated approach to addressing climate change and biodiversity loss while supporting sustainable development. Yet, their implementation across Southeast Asia remains fragmented and often contested.
Helena Varkkey, Michelle Ann Miller, David Taylor   +2 more
wiley   +1 more source

Investigations of dielectric monitoring on an energised transformer oil–paper insulation system

IET Science, Measurement & Technology, 2015
Frequency domain spectroscopy (FDS) is being used to assess the insulation condition of oil–paper power transformers. However, it has to date only been implemented on de‐energised transformers, which requires the transformers to be shut down for an extended period and may cause significant costs.
Yang, Xu, Nielsen, Shawn, Ledwich, Gerard   +2 more
openaire   +4 more sources

Effects of thermal aging on moisture equilibrium in oil-paper insulation

, 2018
Recent studies have reported that thermal aging of insulation paper affects its moisture absorption property, which can affect moisture equilibrium in oil-paper insulation.
Li, Huize, Liao, Wei, Wang, An, Li, Xianlang, Wang, Dongyang, Zhou, Lijun, Cui, Yi   +6 more
core   +1 more source

Co0.05‐Bi2S3/CF Photothermal Layer Integrated With Freeze‐Cast Alumina Vertical Channels for Efficient Interfacial Solar Desalination

Electron, EarlyView.
A bicomponent solar‐driven interfacial evaporator made of Co0.05‐Bi2S3/carbon foam (CF) (photothermal material) on a porous alumina substrate prepared by freeze‐casting, having vertically aligned microchannels and low thermal conductivity (k = (1.14 ± 0.06) W m−1 K−1), was explored.
Muzammil Hussain, Sara Pattaro, Michele Zanardo, Eduardo Arango Durango, Enrique Rodríguez‐Castellón, Davide Cristofori, Vittorio Morandi, Farid Akhtar, Tofik Ahmed Shifa, Elisa Moretti, Alberto Vomiero   +10 more
wiley   +1 more source

Methanol Equilibrium Curves of Power Transformer Oil–Paper Insulation

Energies
To eliminate the problem of the aging of cellulose insulation in the manufacturing stage, a new drying method is being developed based on the use of methanol vapors.
Piotr Przybylek
doaj   +1 more source

Experimental studies on the estimated life of oil-immersed insulation paper in traction transformers

, 2020
Traction transformers are one of the most important equipment in the traction power supply system. Thermal aging of transformer insulation system determines its reliable life. To achieve an estimation of the insulation life of traction power transformers
Liao, Wei, Wang, Lujia, Guo, Lei, Wang, Dongyang, Zhang, Liqing, Zhou, Lijun, Cui, Yi   +6 more
core   +1 more source

TRANSFORMER BUSHING WITH OIL-PAPER INNER 110 KV INSULATION [PDF]

, 2021
In the course of the work, various designs of high-voltage bushings and their production technology at manufacturing plants were studied.
Бородин, К. И., Салыков, К. М., Borodin, K. I., Salykov, K. M.   +3 more
core