Results 31 to 40 of about 1,941,585 (293)
Frequency regulation optimization strategy of improved virtual synchronous generator under ultra-weak grid conditions [PDF]
AIP AdvancesTo enhance the frequency support capability of grid-forming energy storage systems governed by Virtual Synchronous Generators (VSGs) under ultra-weak grid conditions, an improved VSG frequency support strategy is proposed based on model predictive ...
Xucun Guo +5 more
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A voltage-sensorless controller for grid converters
, 2021 Grid converters need information about the point-of-common-coupling voltage for their control. The voltage is typically measured for current and ac-bus voltage control, and for synchronization. In order to increase reliability by decreasing dependence on
Jarno Kukkola +7 more
core +1 more source
A classification of emerging and traditional grid systems [PDF]
, 2008 The grid has evolved in numerous distinct phases. It started in the early ’90s as a model of metacomputing in which supercomputers share resources; subsequently, researchers added the ability to share data.
Li, M, Kurdi, H, Al-Raweshidy, H
core +4 more sources
EnergiesGiven the problems that the phase-locked loop frequency coupling effect (PLL-FCE) in a weak grid reduces the quality of the output current waveform and brings challenges to maintaining a steady running of the grid-connected converter (GCC), this paper ...
Ye Zhang, Haibo Pen, Xiaoyu Zhang
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New power decoupling strategy for grid-connected inverter under weak power grid
E3S Web of Conferences, 2018 This study analyzes the power coupling in a weak power grid, and designs a novel decoupling method for the coupling power with multi harmonic frequency on the dc bus.
Wai Rong-Jong, Wang Yu
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Improved Fractional-order Damping Method for Voltage-controlled DFIG System Under Weak Grid
Journal of Modern Power Systems and Clean Energy, 2022 When a doubly-fed induction generator (DFIG) is connected to a weak grid, the coupling between the grid and the DFIG itself will increase, which will cause stability problems. It is difficult to maintain the tracking accuracy and ro-bustness of the phase-
Zhen Xie +3 more
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International Journal of Electrical Power & Energy SystemsThe stability of grid-connected wind power system (GCWPS) is prone to deteriorate due to the impedance interaction between wind turbines and the weak grid.
Haining Wang +5 more
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Frontiers in Energy Research, 2022 Under weak grid conditions, the variation of the grid impedance will affect the steady-state and dynamic performance of the LCL-filtered grid-connected inverter and even make the inverter unstable.
Fuyun Wu +4 more
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Robust Control of Grid-connected Inverters Based on PLL Bandwidth Decoupling in Weak Grids
Xiandai dianliUnder weak grid conditions, the increase in PLL bandwidth easily leads to the decrease in the stability margin of the grid-connected system. For this reason, we propose a new control structure based on phase-locked loop (PLL) bandwidth decoupling, which ...
Congcong YIN +5 more
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FEBS Letters, EarlyView.Transient oligomers formed by intrinsically disordered proteins may be ‘invisible’ to direct detection yet remain accessible to solution NMR through equilibrium‐exchange measurements and pressure‐jump experiments. Complementary methods report on mass, stoichiometry, selected distance distributions, morphology, and internal packing.
Martin D. Gelenter, Ad Bax
wiley +1 more source