Results 31 to 40 of about 791,080 (196)

Stability Control of Grid-Connected Converter Considering Phase-Locked Loop Frequency Coupling Effect

Energies
Given 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
doaj   +1 more source

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
doaj   +1 more source

A Control Parameters Design Method With Multi-Constrains for an LCL-Filtered Grid-Connected Inverter in a Weak Grid

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, Zhuang Sun, Weiji Xu, Zhizhou Li, Jianguo Lyu   +4 more
doaj   +1 more source

Velocity-gauge real-time TDDFT within a numerical atomic orbital basis set [PDF]

, 2017
The interaction of laser fields with solid-state systems can be modeled efficiently within the velocity-gauge formalism of real-time time dependent density functional theory (RT-TDDFT). In this article, we discuss the implementation of the velocity-gauge
Kas, J. J., Pemmaraju, C. D., Prendergast, David, Rehr, J., Sato, S. A., Vila, F. D., Yabana, K.   +6 more
core   +3 more sources

Stability enhancement control strategy for grid-connected wind power system based on composite feedforward damping

International Journal of Electrical Power & Energy Systems
The 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, Zhiwei Xie, Yandong Chen, Wenhua Wu, Zhen Zhu, Jiayuan Gao   +5 more
doaj   +1 more source

Saturation in the Hypercube and Bootstrap Percolation [PDF]

, 2015
Let $Q_d$ denote the hypercube of dimension $d$. Given $d\geq m$, a spanning subgraph $G$ of $Q_d$ is said to be $(Q_d,Q_m)$-saturated if it does not contain $Q_m$ as a subgraph but adding any edge of $E(Q_d)\setminus E(G)$ creates a copy of $Q_m$ in $G$.
Morrison, Natasha, Noel, Jonathan A., Scott, Alex   +2 more
core   +2 more sources

Control Strategy of Vienna Rectifier With LCL Filter Under Weak Grid Conditions

发电技术, 2019
For the LCL type filter, there is a natural resonance peak, and the change of the grid impedance in the actual power grid will further affect the stability of the rectifier.
Yuanpeng FENG, Jiuhe WANG, Jianguo LI, Qiaojie ZHANG   +3 more
doaj   +1 more source

Stability Assessment of Current Controller with Harmonic Compensator for LCL-Filtered Grid-Connected Inverter under Distorted Weak Grid

Applied Sciences, 2020
An assessment of the stability and performance of current controllers with harmonic compensators is presented for an inductive-capacitive-inductive (LCL)-filtered grid-connected inverter under distorted weak grid conditions.
Seung-Jin Yoon, Thuy Vi Tran, Kyeong-Hwa Kim   +2 more
doaj   +1 more source

Voltage stability improvement of weak grids using a new cascade droop control of grid-connected converter

International Journal of Electrical Power & Energy Systems
The voltage control loop of a virtual synchronous generator (VSG) is typically governed by a conventional reactive power-voltage droop control, which may exhibit instability when encountering disturbances or operating under weak grid conditions.
Hayder Hassan Abbas, Qobad Shafiee, Hassan Bevrani   +2 more
doaj   +1 more source

Improved LVRT Performance of PV Power Plant Using Recurrent Wavelet Fuzzy Neural Network Control for Weak Grid Conditions

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, Kuang-Hsiung Tan, Wen-Chou Luo, Guo-Deng Xiao   +3 more
doaj   +1 more source