Results 31 to 40 of about 1,475,197 (300)

Quantitative stability analysis of STATCOM in voltage control mode and Enhanced control method based on voltage feedforward

International Journal of Electrical Power & Energy Systems
STATCOM is a crucial device for reactive power compensation and voltage regulation. However, under weak grid conditions, oscillations may arise during voltage control (VC) mode operation due to the AC Voltage Controller (AVC), potentially jeopardizing ...
Song Zhang, Yandong Chen, Qianyuan Li, Zhiwei Xie, Youze Fu, Wenhua Wu   +5 more
doaj   +1 more source

Upconversion of optical signals with multi-longitudinal-mode pump lasers

, 2012
Multi-longitudinal-mode lasers have been believed to be good candidates as pump sources for optical frequency conversion. However, we present a semi-classical model for frequency conversion of optical signals with a multimode pump laser, which shows that
G.-L. Shentu, J. S. Pelc, J. W. Goodman, Jian-Wei Pan, M. M. Fejer, Q. Zhang, R. Loudon   +6 more
core   +1 more source

Efficient resonant power conversion

IEEE Transactions on Industrial Electronics, 1990
The DC analysis of a series-resonant converter operating above resonant frequency is presented. The results are used to analyze the current form factor and its effect on the efficiency. The selection of the switching frequency to maximize the efficiency is considered.
Valtchev, S.S. (author), Klaassens, J.B. (author)   +1 more
openaire   +3 more sources

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Flexibility provision by virtual power line and soft open point in AC/DC distribution systems

International Journal of Electrical Power & Energy Systems
The increasing penetration of photovoltaic generation will significantly challenge the voltage quality, power flow, power losses in active distribution networks.
Xiaodong Yang, Wentao Jiang, Jing Ma, Da Xu, Chengjia Zhang, Yue Yang, Zhicheng Xu   +6 more
doaj   +1 more source

The crystal structure of tris(μ2-1,3-bis(4,4,4-Trifluoro-3-oxido-1-(oxo)but-2-en-1-yl)phenyl-/κ4O,O′:O′′,O′′′)-bis(1,2-dimethoxyethane-O,O′)-diterbium(III)

Zeitschrift für Kristallographie - New Crystal Structures, 2015
C50H38F18O16Tb2, monoclinic, C2/c (No. 15), a = 15.6505(13) Å, b = 12.8157(10) Å, c = 29.4494(24) Å, α = 90.0(0)°, β = 91.9581(9)°, γ = 90.0(0)°, V = 91.9581(9) Å3, Z = 4, Rgt(F) = 0.0262, wRref(F2) = 0.0612, T = 293 K.
Wang Bilin, Shi Jing, Hou Yan Jun, Chu Wen Yi, Sun Zhi Zhong   +4 more
doaj   +1 more source

Optimizing optical Bragg scattering for single-photon frequency conversion

, 2014
We develop a systematic theory for optimising single-photon frequency conversion using optical Bragg scattering. The efficiency and phase-matching conditions for the desired Bragg scattering conversion as well as spurious scattering and modulation ...
Clark, Alex S., Eggleton, Benjamin J., Lefrancois, Simon   +2 more
core   +2 more sources

Efficient photosynthesis of carbon monoxide from CO2 using perovskite photovoltaics [PDF]

, 2015
Artificial photosynthesis, mimicking nature in its efforts to store solar energy, has received considerable attention from the research community. Most of these attempts target the production of H2 as a fuel and our group recently demonstrated solar-to ...
Abate, A, Curvat, L, Giordano, F, Grätzel, M, Luo, J, Mayer, MT, Schreier, M, Steier, L, Zakeeruddin, SM   +8 more
core   +1 more source

Reciprocal control of viral infection and phosphoinositide dynamics

FEBS Letters, EarlyView.
Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley   +1 more source

Analysis and suppression method of synchronous frequency resonance for self-synchronizing voltage source inverter

International Journal of Electrical Power & Energy Systems
Self-synchronizing voltage source inverter (SSVSI) can effectively improve grid frequency stability. However, the synchronous frequency resonance (SFR) inevitably exists in SSVSI.
Youze Fu, Yandong Chen, Zhiwei Xie, Zili Wang, Shixiang Cao, Xuyang Li, Xudong Li, Hua Li   +7 more
doaj   +1 more source