Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Zhongyong Zhao"'
Publikováno v:
IEEE Access, Vol 8, Pp 216271-216282 (2020)
The accurate and fast diagnosis of transformer winding deformation faults is of significance to power suppliers and utilities. An improved winding mechanical deformation fault classification method is proposed. In this study, the transformer frequenc
Externí odkaz:
https://doaj.org/article/9c671598a76f43baa0f61be1930d12d6
Publikováno v:
IEEE Access, Vol 7, Pp 65093-65102 (2019)
Modular multilevel converter (MMC)-based high-voltage direct current (HVDC) grid is a promising technology for multiple offshore wind farms (OWFs) to form interconnected offshore grids. However, in the MMC-HVdc grid, the converter terminals connectin
Externí odkaz:
https://doaj.org/article/62623164419b4a8f81bb109740372012
Publikováno v:
IEEE Access, Vol 7, Pp 182624-182631 (2019)
Transformer oil is an important insulating material in power transformers. The detection of transformer oil is an important means to ensure the normal operation of the power system, which is recognized by the public. Interfacial tension (IFT) is an i
Externí odkaz:
https://doaj.org/article/63dae9c55ae14644a17ba2ce900cb9cd
Publikováno v:
IEEE Access, Vol 7, Pp 40463-40474 (2019)
Frequency response analysis (FRA) has been widely accepted as a diagnostic tool for power transformer winding deformation faults. Typically, both amplitude-frequency and phase-frequency signatures are obtained by an FRA analyzer. However, most existi
Externí odkaz:
https://doaj.org/article/01050e3bb455475d994d96563c78ea86
Publikováno v:
IEEE Access, Vol 7, Pp 112494-112504 (2019)
As an important part of power system, power transformer plays an irreplaceable role in the process of power transmission. Diagnosis of transformer's failure is of significance to maintain its safe and stable operation. Frequency response analysis (FR
Externí odkaz:
https://doaj.org/article/7372856d82b747ae98a81f2b9e6447f7
Publikováno v:
IEEE Access, Vol 6, Pp 48934-48945 (2018)
Online impulse frequency response analysis (IFRA) has proven to be a promising method to detect and diagnose the transformer winding mechanical faults when the transformer is in service. However, the existing fast Fourier transform (FFT) is actually
Externí odkaz:
https://doaj.org/article/14d5cb1aed2841fbafe34ff2c8a473e3
Publikováno v:
Applied Sciences, Vol 11, Iss 10, p 4631 (2021)
The accurate establishment of the equivalent circuit model of the synchronous machine windings’ broadband characteristics is the basis for the study of high-frequency machine problems, such as winding fault diagnosis and electromagnetic interferenc
Externí odkaz:
https://doaj.org/article/0da7c6b2bd244fa1a484981af045c67d
Publikováno v:
Energies, Vol 12, Iss 7, p 1379 (2019)
The water content in oil is closely related to the deterioration performance of an insulation system, and accurate prediction of water content in oil is important for the stability and security level of power systems. A novel method of measuring wate
Externí odkaz:
https://doaj.org/article/1b9987ce4b9b4c79beea697b17447bc9
Publikováno v:
Energies, Vol 10, Iss 12, p 2022 (2017)
A transformer is the most valuable and expensive property for power utility, thus ensuring its reliable operation is a major task for both operators and researchers. Online impulse frequency response analysis has proven to be a promising technique fo
Externí odkaz:
https://doaj.org/article/341c87c0623747be858bfc874228fa0c
Publikováno v:
IEEE Transactions on Industrial Informatics. 19:2409-2420
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::242c8249109f3e0bbe722aef5e21d960
https://doi.org/10.1109/tii.2022.3172182
https://doi.org/10.1109/tii.2022.3172182