Results 41 to 50 of about 306,024 (298)
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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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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Voltage Weak DC Distribution Grids [PDF]
Electric Power Components and Systems, 2017 AbstractThis paper describes the behavior of voltage weak DC distribution systems. These systems have relatively small system capacitance. The size of system capacitance, which stores energy, has a considerable effect on the value of fault currents, control complexity, and system reliability.
Tsegay Gebremedhin Hailu +3 more
openaire +3 more sources
Explicit Impedance Modeling and Shaping of Grid-Connected Converters via an Enhanced PLL for Stabilizing the Weak Grid Connection [PDF]
, 2022 The voltage source converters (VSCs) are used to interface and control the renewable energy resources that are integrated into the power grids. However, a weak grid connection raises a stability problem for grid synchronization of the grid-feeding ...
Savkin, Andrey V. +3 more
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Subtype‐specific enhancer RNAs define transcriptional regulators and prognosis in breast cancers
Molecular Oncology, EarlyView.This study employed machine learning methodologies to perform the subtype‐specific classification of RNA‐seq data sets, which are mapped on enhancers from TCGA‐derived breast cancer patients. Their integration with gene expression (referred to as ProxCReAM eRNAs) and chromatin accessibility profiles has the potential to identify lineage‐specific and ...
Aamena Y. Patel +6 more
wiley +1 more source
Robust PLL Synchronization Unit for Grid-Feeding Converters in Micro/Weak Grids
IEEE Transactions on Industrial Informatics, 2023 A grid-feeding voltage source converter (GFD-VSC) requires a phase-locked loop (PLL) synchronization unit to be connected to the grid. The PLL critically affects the dynamic performance and stability of the GFD-VSC. In particular, a PLL with in-loop filtering, for working under distorted/polluted conditions, possesses a narrow stability margin and ...
Eskandari, M, Savkin, AV
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IEEE Access, 2020 An intelligent control method using recurrent wavelet fuzzy neural network (RWFNN) is proposed to improve the low-voltage ride through (LVRT) performance of a two-stage photovoltaic (PV) power plant under grid faults for the weak grid conditions.
Faa-Jeng Lin +3 more
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Power-Synchronized Grid-Following Inverter Without a Phase-Locked Loop
IEEE Access, 2021 This paper proposes a power-synchronized control strategy for grid-following inverters (GFLIs) to regulate their power exchange with the grid without any need for sensing/regulating the point of connection voltage.
Behrooz Bahrani
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DFIG-based Windfarm Starting Connected to a Weak Power Grid
, 2019 Starting and energization of windfarms has always been done under strong grid conditions. With the increase in blackouts and desire to run parts of the system in island mode, it is necessary to examine the starting of windfarms under different system ...
Sanjari, MJ, Maina, DK, Nair, N-KC
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