Results 81 to 90 of about 5,815,291 (292)

A review on chemical diagnosis techniques for transformer paper insulation degradation [PDF]

, 2013
Energized parts within power transformer are isolated using paper insulation and are immersed in insulating oil. Hence, transformer oil and paper insulation are essential sources to detect incipient and fast developing power transformer faults.
Abu Bakar, Norazhar, Abu Bakar Norazhar, Siada, A. Abu, A. Abu-Siada, Abu Siada, Ahmed, Islam, Syed, Islam, S., S. Islam   +7 more
core   +1 more source

Transformer insulation stressed by power converters

, 2021
For å kunne ta i bruk flere fornybare energikilder i kraftsystemet, med så lite effekttap som mulig, blir stadig mer kraftelektronikk tatt i bruk i kraftsystemet. Kraftelektronikkomformere brukes primært til å skru av og på halvlederbrytere for å oppnå ønsket spenningsform.
openaire   +1 more source

Multifunctional Photochromic Piezoionic Eutectogels Through Interfacial Nanoparticle Engineering

Advanced Functional Materials, EarlyView.
Photochromic WO3 nanoparticles enable photoresponsive piezoionics in deep eutectic solvent‐based eutectogels by coupling photoinduced electronic processes with pressure‐driven ionic transport. Interfacial nanoparticle engineering enhances ionic mobility and electromechanical output, while reversible photoactivation modulates the electrical response ...
Saúl Carrasco‐Saavedra, Alister Urain, Nerea Casado, Ilaria Abdel Aziz, Naroa Lopez‐Larrea, Domingo Rangel‐Miranda, Gerardo A. Fonseca‐Hernández, Nicolas Tanguy, David Mecerreyes, Josué D. Mota‐Morales   +9 more
wiley   +1 more source

Study on transformer electric field in different degrees of insulation aging considering temperature effects

AIP Advances
In the transformer operation process, as the time continues to rise, the transformer winding and core will generate heat. Transformer oil, as an important heat dissipation and insulation part of the transformer, absorbs the heat generated by the ...
Chang Li
doaj   +1 more source

The assessment method of transformer oil-paper insulation state based on PSO-ELM

电力工程技术
Oil-immersed power transformer is an important part of power grid, and its reliable operation plays a vital role in pomler system security. Aiming at the problem that the insulation state of transformer cannot be assessed quantitatively after long-term ...
ZHANG Dewen, ZHANG Jian, QU Limin, WU Dixing, LIU Heqian, ZHANG Mingze   +5 more
doaj   +1 more source

Decay products in the liquid insulation of power transformers

IET Electric Power Applications, 2010
There is a general agreement that in service conditions the quality of insulating fluids gradually deteriorates under the impact of electrical, thermal and chemical stresses. An important side effect of oil gassing related to the invisible colloidal suspensions is also investigated.
I. Fofana, A. Bouaïcha, M. Farzaneh, J. Sabau, D. Bussières, E.B. Robertson   +5 more
openaire   +1 more source

Advancing Human Skin Equivalents: The Crucial Role of Neurovascular Integration

Advanced Healthcare Materials, EarlyView.
This review discusses the importance of integrating vascular and peripheral nerve systems into human skin equivalents (HSEs) to better recapitulate native skin physiology. Recent advances in vascularized, innervated, and neurovascularized HSEs are highlighted, together with emerging bioengineering strategies, current challenges, and future ...
Hao Wu, Lorenzo Moroni, Nicolas Lebonvallet, Vincent Flacher, Paul Wieringa   +4 more
wiley   +1 more source

Assessment of the resource consumption of oil-filled power transformer paper insulation based on updated aging integral

Electrical engineering & Electromechanics, 2015
Refinement of the aging integral formula is proposed. A com-puter model of insulation wearing out is developed using refined formula. Computer simulation of power transformer insulation wearing out over the next ten years of life is carried out.
V.V. Vasilevskij
doaj  

Evaluation of Lightning Impulse Test by Frequency Response Analysis [PDF]

, 2006
In this work are presented the basis for improving the interpretation of transformer lightning impulse test and the development of a graphical user interface system, which allows comparisons of time domain data and frequency response.
Jorge Ramirez, Baudilio Valecillos, Valecillos, Baudilio, Ramírez, Jorge   +3 more
core   +2 more sources

Ferroelectric Quantum Dots for Retinomorphic In‐Sensor Computing

Advanced Materials, EarlyView.
This work has provided a protocol for fabricating retinomorphic phototransistors by integrating ferroelectric ligands with quantum dots. The resulting device combines ferroelectricity, optical responsiveness, and low‐power operation to enable adaptive signal amplification and high recognition accuracy under low‐light conditions, while supporting ...
Tingyu Long, Huanyu Zhou, Jaewan Ko, Hongwei Tan, Jaemin Lim, Yanfei Zhao, Daehan Kang, Eojin Yoon, Gyeong‐Tak Go, Somin Kim, Seung‐Woo Lee, Chan‐Yul Park, Hyojun Choi, Hyeran Kim, Hyung Joong Yun, Sung Hyuk Park, Kwan Sik Park, Jeong Woo Park, Mungeun Kim, Yong Soo Cho, Ho Won Jang, Wenqiang Yang, Min Hyuk Park, Wan Ki Bae, Sebastiaan van Dijken, Joona Bang, Tae‐Woo Lee   +26 more
wiley   +1 more source