Zobrazeno 1 - 10
of 1 600
pro vyhledávání: '"oil-paper insulation"'
Autor:
Feipeng Wang, Jian Zhou, Linyang Dan, Yihua Qian, Shi Li, Issouf Fofana, Massimo Pompili, Jian Li
Publikováno v:
Polymer Testing, Vol 140, Iss , Pp 108592- (2024)
The oil-paper insulation system in eco-friendly fire-retardant transformers depends on hydrophilic natural ester insulating oil. Moisture within the system synergistically interacts with aging, worsening oil-paper insulation degradation and hastening
Externí odkaz:
https://doaj.org/article/9ae712504e034cdbb054ea96e1424200
Publikováno v:
电力工程技术, Vol 43, Iss 3, Pp 201-208 (2024)
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-te
Externí odkaz:
https://doaj.org/article/0f1317186aaa43079a061ec95309728e
Publikováno v:
CSEE Journal of Power and Energy Systems, Vol 10, Iss 2, Pp 717-726 (2024)
To improve the accuracy and efficiency of the aging life prediction and assessment of transformer oil-paper insulation, and to make up for the deficiencies of traditional characterizers, such as 2-furfural, carbon monoxide, and carbon dioxide, a meth
Externí odkaz:
https://doaj.org/article/b2399c3ae6304e2d84ae943d2c40b744
Publikováno v:
电力工程技术, Vol 43, Iss 1, Pp 181-191 (2024)
Ultra high frequency (UHF) partial discharge (PD) detection is a common method for transformer oil-paper insulation defect location. However, the accuracy of PD positioning in practical application is easily affected by noise and sensor layout. In or
Externí odkaz:
https://doaj.org/article/49960d537f884ac890fcac8de625f1e4
Autor:
Piotr Przybylek
Publikováno v:
Energies, Vol 17, Iss 21, p 5333 (2024)
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. Previous studies have shown that the complete removal of methanol from the cellulose
Externí odkaz:
https://doaj.org/article/96ed6274580842bea0cbd10ef6c68fed
Autor:
Haifeng Zhang, Zilong Zhang, Jingyi Yan, Siyang Wang, Xubin Huang, Fangmin Zuo, Ao Li, Fengkai Gao, Haidan Lin, Bolin Wang
Publikováno v:
Molecules, Vol 29, Iss 19, p 4690 (2024)
Defining the copper-based catalysts that are responsible for the catalytic behaviour of oil-paper insulation systems and implementing effective regulation are of great significance. Accelerated ageing experiments were conducted to reveal variations i
Externí odkaz:
https://doaj.org/article/295c620f30504e7ea642724909ac16a2
Autor:
Letizia De Maria, Francesco Arcadio, Giuseppe Gabetta, Daniele Merli, Giancarla Alberti, Luigi Zeni, Nunzio Cennamo, Maria Pesavento
Publikováno v:
Sensors, Vol 24, Iss 16, p 5261 (2024)
2-Furaldehyde (2-FAL) is one of the main by-products of the degradation of hemicellulose, which is the solid material of the oil–paper insulating system of oil-filled transformers. For this reason, it has been suggested as a marker of the degradati
Externí odkaz:
https://doaj.org/article/42a0be58f8f24c73b1115ae8bf0b3b9c
Publikováno v:
Energies, Vol 17, Iss 15, p 3811 (2024)
In order to reveal the migration and evolution of gas molecules in the actual oil–paper insulation composite system of transformer from the molecular level, the diffusion behavior of seven gas molecules (H2, CO, CO2, CH4, C2H2, C2H4, C2H6) generate
Externí odkaz:
https://doaj.org/article/340d135450c34543b3851182b3ac4a57
Publikováno v:
Frontiers in Materials, Vol 10 (2024)
Power transformers are critical equipment responsible for the transmission and transformation of electrical energy, and they are an important component of power system. Under the combined effects of electric field, thermal field, and mechanical stres
Externí odkaz:
https://doaj.org/article/ea97afd04ba140f597aabd9678582b07
Publikováno v:
Zhejiang dianli, Vol 42, Iss 6, Pp 86-97 (2023)
To explore the microscopic mechanism of thermal stability of oil-paper insulation， a molecular model consistent with the actual oil-paper insulation is established. Through comparison with the experimental results， the effectiveness of the model
Externí odkaz:
https://doaj.org/article/ee7ab704cf504d61bd1929d333116e4a