Results 21 to 30 of about 9,388 (253)
IEEE Access, 2023 Compared with traditional DC power flow analysis; multi-voltage level DC grid power flow analysis is more complex due to its diverse operation methods. This article proposes the power flow calculation method in multi-voltage level DC grid considering the
Shifeng Ye +3 more
doaj +1 more source
Electromagnetic Modelling of Power Transformers with DC Magnetization [PDF]
, 2012 DC currents that flow through the ground can be injected to the star windings of power transformers from their grounded neutral points and close their path with transmission lines.
Seyed Ali Mousavi
openalex +2 more sources
IEEE Access, 2021 Conventional dc bias suppression strategies mainly rely on a single type of device, such as blocking capacitor or blocking resistance. However, these methods are passive palliatives and cannot restrain dc bias currents from the sources.
Shumin Ma +6 more
doaj +1 more source
Effect of external DC field on current transformers with amorphous and nanocrystalline cores [PDF]
, 2022 Nanocrystalline and amorphous stress-annealed and field annealed tapes are used for cores of DC-tolerant current transformers. We analyze the influence of external DC field of arbitrary direction on the performance of these transformers.
Ripka P., Mlejnek P., Mirzaei M.
core +1 more source
Detection Method of the DC Bias in Distribution Power Transformers [PDF]
, 2013 Non-linear loads such as AC drives switch-mode power supplies and grid-connected converters can cause, besides the generation of unwanted current harmonics, a DC current component injection into the grid.
Giampaolo Buticchi, Emilio Lorenzani
openalex +3 more sources
Experimental studies of influence of DC and AC electric fields on bridging in contaminated transformer oil [PDF]
, 2015 Analysis of real operating condition revealed that HVDC transformers experience combined effect of DC biased AC electric field. The dynamics of pressboard particle in contaminated transformer oil under the influence of DC, AC and DC biased AC electric ...
Mahmud, S. +4 more
core +1 more source
A self-correcting method for bad data in flexible DC line protection based on digital twinning
电力工程技术, 2023 DC line protection is the key to the development of flexible DC grids, and fault identification within 3 ms is required. Existing scholars have proposed a digital twinning based flexible DC line protection method with high speed and sensitivity ...
HE Jinghan +5 more
doaj +1 more source
Augmented Models of High-Frequency Transformers for SMPS [PDF]
, 2009 The modeling of high-frequency transformers via augmented equivalent circuits is addressed. The augmented models are composed of a low-frequency equivalent and a supplemental element modeled via real rational fitting. They offer both high accuracy levels
Savi, Patrizia +3 more
core +1 more source
The Performance of an Integrated Transformer in a DC/DC Converter [PDF]
TELKOMNIKA (Telecommunication Computing Electronics and Control), 2017 The separation between the low-voltage part and high-voltage part of the converter is formed by a transformer that transfers power while jamming the DC ring. The resonant mode power oscillator is utilized to allow elevated competence power transfer.
Abdelhadi Namoune +2 more
openaire +2 more sources
Bridging in contaminated transformer oil under DC and AC electric field [PDF]
, 2013 One of the key components in high voltage transmission and distribution systems are power transformers and their consistent operation is of utmost importance to energy utilities and users.
Wilson, G +9 more
core +1 more source