Results 31 to 40 of about 44,267 (264)

Impedance remodeling control strategy of grid-connected inverter with inertia-damping phase-locked loop under extremely weak grid

International Journal of Electrical Power & Energy Systems
The operation of the grid-connected inverter (GCI) in weak grid conditions presents a risk of instability due to the presence of high grid impedance and the negative impedance effect of the phase-locked loop (PLL).
Youjun Zhu, Jinbin Zhao, Zhiwei Zeng, Ling Mao, Keqing Qu   +4 more
doaj   +1 more source

Impact of modern electronic equipment on the assessment of network harmonic impedance [PDF]

, 2016
Network harmonic impedance forms the link between harmonic currents emitted by individual devices and the harmonic voltage levels in the grid. It is essential for the definition of current emission limits in order to ensure Electromagnetic Compatibility ...
Chakravorty, D, Schegner, P, Schocke, M, Meyer, J, Yanchenko, S   +4 more
core   +1 more source

Robustness Improvement of Single-Phase Inverters Under Weak Grid Cases by Adding Grid Current Feedforward in Delay-Based Phase-Locked Loop

IEEE Access, 2020
For inverters, a phase-locked loop (PLL) is usually needed for the grid synchronization. Typically, for the single-phase inverters, the orthogonal-signal-generators based PLLs (e.g., delay-based PLL) can be used.
Jinming Xu, Shenyiyang Bian, Qiang Qian, Hao Qian, Shaojun Xie   +4 more
doaj   +1 more source

Stability Analysis of Multi-Inverters Grid-Connected System Using Improved Current Source Impedance Ratio Criterion

Elektronika ir Elektrotechnika, 2019
Stability analysis of multi-inverters grid-connected system in electric vehicles power station is presented in this paper. An equivalent circuit model of the multi-inverters grid-connected system is built based on electrical network theory.
Hu Guozhen, Mao Ling, Liu Jun, Zhang Lei, Fang Zhi Jian   +4 more
doaj   +1 more source

Resonance suppression and quality improvement control strategy for a three-phase grid-connected voltage-source inverter under weak grid conditions

Frontiers in Energy Research, 2023
The three-phase voltage-source grid-connected inverters suffer from grid-connected current quality problems due to system resonance caused by the under-damping characteristics of the filter and grid impedance, on the one hand, and the grid-connected ...
Zhi Zhang, Yiyun Li, Yiyun Li, Caomao Zhong, Zhaoyun Zhang   +4 more
doaj   +1 more source

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, Peyman Zarrineh, Nathnael T. Tuffa, Jigar H. Sheth, Sumitra Mohan, Mudassar Iqbal, Sankari Nagarajan   +6 more
wiley   +1 more source

Impedance-Phase and Magnitude Control Method to Improve Stability of Grid-Connected Inverters in Weak Grid

CSEE Journal of Power and Energy Systems
Grid impedance and phase-locked loop (PLL) are critical factors for the stability of the grid-connected inverters (GCIs) in a weak grid. They are the positive feedback control loops formed by PLL in the GCI with grid impedance.
Chunming Tu, Jiayuan Gao, Fan Xiao, Qi Guo, Fei Jiang   +4 more
doaj   +1 more source

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, Xiang Gao, Shuying Yang, Xing Zhang   +3 more
doaj   +1 more source

Large‐scale bidirectional arrayed genetic screens identify OXR1 and EMC4 as modifiers of αSynuclein aggregation

FEBS Open Bio, EarlyView.
Activation of the mitochondrial protein OXR1 increases pSyn129 αSynuclein aggregation by lowering ATP levels and altering mitochondrial membrane potential, particularly in response to MSA‐derived fibrils. In contrast, ablation of the ER protein EMC4 enhances autophagic flux and lysosomal clearance, broadly reducing α‐synuclein aggregates.
Sandesh Neupane, Lea Nikolić, Lorenzo Maraio, Thomas Goiran, Nathan Karpilovsky, Stefano Sellitto, Vangelis Bouris, Jiang‐An Yin, Ronald Melki, Edward A Fon, Adriano Aguzzi, Elena De Cecco   +11 more
wiley   +1 more source

Grid Connected Inverter Behavior with an Output LC Filter under Voltage Sag Operation [PDF]

, 2009
The aim of this paper is to propose an over current limitation and voltage control strategy for a grid connected inverter with a LC output filter used in distributed generation and in case of voltage sag.
COLAS, Frédéric, GUILLAUD, Xavier, SALHA, Fouad   +2 more
core