Results 51 to 60 of about 4,357,992 (165)
A virtual source model for kilo-voltage cone beam CT: source characteristics and model validation
, 2011 The purpose of this investigation was to study the source characteristics of a clinical kilo-voltage cone beam CT unit and to develop and validate a virtual source model that could be used for treatment planning ...
E. Spezi +13 more
core +1 more source
IET Generation, Transmission & DistributionThis paper demonstrates that the switching of one grid‐connected virtual synchronous generator (VSG) between two control modes, namely constant voltage control (CVC) and current limiting control (CLC) happens at the derived two switching lines.
Yujun Li +4 more
doaj +1 more source
The Journal of Engineering, 2019 Carrier interleaved pulse width modulated modular multilevel converters provide multiple benefits including increased effective switching frequency, switching frequency harmonic elimination, and reduced filter requirements. For converters comprising high
Mark A. H. Broadmeadow, Kenneth D. Sands
doaj +1 more source
Grid integration and a power quality assessment of a wave-energy park
IET Smart Grid, 2019 This study presents a step toward the grid connection of a wave-energy park through an electric power conversion system (EPCS) developed and installed for the wave-energy harvesting in Lysekil, Sweden.
Arvind Parwal +10 more
doaj +1 more source
Formulation of the energy-storage factor for isolated power convertors using integrated magnetics
, 2005 The energy storage in energy-storage components is examined for isolated power convertors. In addition to the basic convertors such as the flyback and forward, the paper also develops the analysis for the various isolated versions of power convertors as ...
Cheng, KWE, Lu, Y, K.W.E. Cheng, Y. Lu
core +1 more source
Power cable stresses caused by transmission line faults in next generation VSC-MMC systems
The Journal of Engineering, 2019 Until today, HVDC systems based on Modular Multilevel Voltage Source Converters (VSC-MMC) have exclusively been realised with cross-linked polyethylene (XLPE) cable transmission in monopolar configuration.
Philipp Tünnerhoff +3 more
doaj +1 more source
A second‐order sliding mode control with active disturbance rejection for dynamic voltage restorers
IET Power ElectronicsThis paper proposes an extended state observer (ESO)‐based second‐order sliding mode control (SMC) for dynamic voltage restorers (DVRs). Unlike the conventional first‐order SMC and some second‐order SMC (SOSMC) methods that suffer from chattering, the ...
Farzaneh Bagheri +3 more
doaj +1 more source
Modelling and control of a back-to-back MMC–HVDC system using ADPSS
The Journal of Engineering, 2019 Back-to-back modular multilevel converter–high-voltage direct current (MMC–HVDC) can realise the asynchronous interconnection of two regional power grids. It can effectively solve the power grid stability problems caused by AC–DC power transfer and avoid
Pucheng Cai, Wang Xiang, Jinyu Wen
doaj +1 more source
Variable DC voltage based reactive power enhancement scheme for MMC‐STATCOM
IET Smart GridConstrained by the AC voltage amplitude modulated by a modular multilevel converter‐based static synchronous compensator (MMC‐STATCOM), its reactive power output may be subject to oscillations under grid contingencies, posing a threat to the grid stable ...
Lujie Yu +4 more
doaj +1 more source
VSC HVDC active damping for the Sylwin 1 offshore wind power plants
The Journal of Engineering, 2019 SylWin1 is a VSC HVDC link connecting 864 MW offshore wind power generation to Germany's high voltage network. This paper presents a harmonic performance analysis of the offshore network carried out during the design and commissioning phase with a focus ...
Alvaro Hernandez Manchola +4 more
doaj +1 more source