Zobrazeno 1 - 10
of 9 914
pro vyhledávání: '"DC bias"'
Publikováno v:
Global Energy Interconnection, Vol 7, Iss 4, Pp 503-512 (2024)
Global energy and environmental issues are becoming increasingly problematic, and the vibration and noise problem of 110 kV transformers, which are the most widely distributed, have attracted widespread attention from both inside and outside the indu
Externí odkaz:
https://doaj.org/article/24bf35907d6a44a585c1249d5448bd25
Autor:
Yang Li, Zhichao Luo
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-17 (2024)
Abstract Power transformer is widely used in the power system with the rapid development of the power converters connected to the grid. When a transformer operates under DC bias conditions, its iron core loss increases significantly, causing local ov
Externí odkaz:
https://doaj.org/article/b621862f7e0643d1b4d842fabecb97d7
Publikováno v:
IEEE Access, Vol 12, Pp 147574-147588 (2024)
This paper investigates an indoor hybrid visible light communication (VLC) and radio frequency (RF) scenario with two-hop downlink transmission. A light emitting diode (LED) transmits both data and energy via VLC to an energy-harvesting relay node, w
Externí odkaz:
https://doaj.org/article/32eab01e7600422eab6feb3b415163a1
Publikováno v:
Journal of Applied Science and Engineering, Vol 27, Iss 4, Pp 2359-2365 (2024)
The large-scale application of flexible DC power transmission technology leads to DC bias in transformer cores, and the vibration analysis of transformers under the influence of DC bias is becoming a hot topic. In this paper, based on the "electromag
Externí odkaz:
https://doaj.org/article/41b2c623fe5544cc816f20436643a41a
Autor:
Zheyan Wang, Ping Huang, Fuyin Zheng, Hongli Yu, Yue Li, Zhichuan Qiu, Lingke Gai, Zhiyao Liu, Shi Bai
Publikováno v:
Micromachines, Vol 15, Iss 10, p 1218 (2024)
Existing magnetic tracer detection systems primarily rely on fundamental wave signal acquisition using non-differential sensor configurations. These sensors are highly susceptible to external interference and lack tomographic localization capabilitie
Externí odkaz:
https://doaj.org/article/a80385d172ba428ebe308b7264816af4
Publikováno v:
Entropy, Vol 26, Iss 7, p 595 (2024)
Metro stray currents flowing into transformer-neutral points cause the high neutral DC and a transformer to operate in the DC bias state.Because neutral DC caused by stray current varies with time, the neutral DC value cannot be used as the only char
Externí odkaz:
https://doaj.org/article/10b41d771f49452aa29da9f2d43288e3
Publikováno v:
IET Power Electronics, Vol 16, Iss 5, Pp 803-815 (2023)
Abstract The transient DC bias current will be generated when the input voltage or load of the dual active bridge (DAB) converter suddenly changes, resulting in the excessive peak value of the inductor current and saturation of the transformer core.
Externí odkaz:
https://doaj.org/article/864042c18822434ba824ee0757fbd89b
Publikováno v:
Energies, Vol 17, Iss 6, p 1354 (2024)
Dual-phase composite magnetic materials have magnetic and permanent magnetic properties. They can realize the dual-phase conversion of soft magnetic and permanent magnetic composites with a small amount of excitation energy. They have the advantages
Externí odkaz:
https://doaj.org/article/4b4bbc7b0bff496b9adae5298f122c07
Publikováno v:
IEEE Access, Vol 11, Pp 21912-21920 (2023)
During the operation of the urban subway, there will be stray current leaking into the ground, which may invade the neutral point of the transformer along the subway line, causing the working magnetization curve of the transformer core to shift, ther
Externí odkaz:
https://doaj.org/article/b4fb23c073484793aa7baba1871db496
Publikováno v:
Energy Reports, Vol 8, Iss , Pp 1176-1183 (2022)
When a transformer is in the DC bias state, a series of consequences will occur. Mainly including excitation current distortion, losses increase, hot spot temperature rise and vibration and noise increase, these consequences are not conducive to the
Externí odkaz:
https://doaj.org/article/27de4d6cedeb4531a7b963c2d06a031d