Zobrazeno 1 - 10
of 561
pro vyhledávání: '"lcsh:QC501-721"'
Autor:
Peter Crossley, Andrew Fieldsend-Roxborough, Paul Jarman, Xiaozhou Mao, Gordon Wilson, Zhongdong Wang
Publikováno v:
High Voltage (2020)
Frequency response analysis (FRA) is regarded as the most effective technique to detect mechanical faults of transformers. Over the years, FRA measurement data have been collected by utilities into transformer asset databases. The characteristic of F
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eaaf1f81d8220f8ce2b77f335bfbe162
https://doi.org/10.1049/hve.2019.0294
https://doi.org/10.1049/hve.2019.0294
Publikováno v:
High Voltage (2020)
The feature extraction and pattern recognition techniques are of great importance to assess the insulation condition of gas-insulated switchgear. In this work, the ultra-high-frequency partial discharge (PD) signals generated from four types of typic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c1886c5765b7df22866f19f5cd00a4c4
https://doi.org/10.1049/hve.2019.0098
https://doi.org/10.1049/hve.2019.0098
Publikováno v:
High Voltage (2020)
Marx generator is a voltage boosting device for power pulse compression, in which its capacitors are charged in parallel and discharged in series. To get a higher voltage boost ratio, high-voltage silicon stacks have been applied to substitute the is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e89f55c632a462e1988301ec5ce7db76
https://doi.org/10.1049/hve.2019.0138
https://doi.org/10.1049/hve.2019.0138
Autor:
Yang Wei, Chen WeiJiang, Zhou Yuan, Zhang Chong, Zhang Zhuo, Chen Xin, Zhao YuShun, Bian XingMing
Publikováno v:
High Voltage (2019)
A saturable reactor is one of the important components of converter valves in high-voltage direct current transmission systems. With the ever-increasing capacities of converter valves, the heat losses generated by saturable reactors are also increasi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1596bedb0372778bb9c4816cd3a2d04e
https://doi.org/10.1049/hve.2019.0125
https://doi.org/10.1049/hve.2019.0125
Autor:
Zheng Zhao, Jiangtao Li
Publikováno v:
High Voltage (2020)
Repetitively pulsed gas volume and dielectric surface discharges have gained growing attention because of peculiar and exciting physics phenomena, high efficiency, high reactivity, and potential to obtain conventionally unachievable plasma properties
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65c53825ea6a5a054e31f77e58194f54
https://doi.org/10.1049/hve.2019.0383
https://doi.org/10.1049/hve.2019.0383
Publikováno v:
High Voltage (2020)
This study proposes a methodology for assessing the availability of voltage source converter high-voltage direct current (HVDC) grids based on the enumeration methodology of contingency analysis with N − 2 criteria and makes contributions in the co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7dfccb3f8f4705d8f4d35596ae077dd9
https://doi.org/10.1049/hve.2020.0028
https://doi.org/10.1049/hve.2020.0028
Publikováno v:
High Voltage (2020)
Onset electric field of soil ionisation is one of the basic parameters to analyse the lightning impulse performance of a grounding electrode, which has been fully investigated based on experiments on hemispherical electrode or rod-to-rod gap. Until n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c2db1acb4ba4e69758a5bc1a793ea12e
https://doi.org/10.1049/hve.2019.0209
https://doi.org/10.1049/hve.2019.0209
Publikováno v:
High Voltage (2020)
To achieve comprehensive insulation deterioration motoring of power equipment and early fault warning in air-insulated substations, a data-driven partial discharge (PD) source localisation method employing noisy ultra-high frequency (UHF) received si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79e7cc88bb6e51221aa85d15b1743b7d
https://doi.org/10.1049/hve.2019.0342
https://doi.org/10.1049/hve.2019.0342
Autor:
Han Yongxia, Licheng Li, Changfu Chen, Xiao Fanglei, Yaqi Zhang, Gao Yuqun, Jie Zhang, Zhang Jinghan
Publikováno v:
High Voltage (2020)
Based on a ±10 kV three-terminal MMC-MVDC (medium voltage DC distribution system based on modular multilevel converter) system, in this study, the authors mainly study on the influencing factors and protection schemes of the lightning intruding over
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec55689f03240d1b149a7f053e520f3b
https://doi.org/10.1049/hve.2019.0256
https://doi.org/10.1049/hve.2019.0256
Publikováno v:
High Voltage (2020)
A simple procedure to estimate series capacitance of a uniform transformer winding from its measured frequency response analysis (FRA) and shunt capacitance is presented. Unlike previously published approaches, this method does not involve any cumber
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f47debc95abe6b8689aaac0999539a2
https://doi.org/10.1049/hve.2019.0251
https://doi.org/10.1049/hve.2019.0251