Results 81 to 90 of about 265,688 (306)

IMPROVING THE EFFICIENCY OF FAULT PROTECTION SYSTEMS OF ELECTRICAL GRIDS BASED ON ZERO SEQUENCE VOLTAGES AND CURRENTS WAVELET TRANSFORMS

Electrical engineering & Electromechanics, 2020
Introduction. A significant proportion of earth faults in medium voltage networks represents a short-lived and transient process. Problem. In such cases, earth fault protection that responds to steady-state current and voltage is not able to operate ...
V. F. Syvokobylenko, V. A. Lysenko
doaj   +1 more source

Комплексное обеспечение ЭМС и электробезопасности в низковольтных распределительных сетях с системой заземления "TN-C-S" [PDF]

, 2010
Наведено результати теоретичних і експериментальних досліджень комплексного забезпечення ЕМС та електробезпеки споживачів електроенергії, а також підвищення її якості в низьковольтних електричних мережах за допомогою фільтрів струму нульової ...
Жаркин, Андрей Федорович, Каплычный, Н. Н., Козлов, А. В., Новский, В. А   +3 more
core  

Electrowetting of liquid marbles [PDF]

, 2006
Electrowetting of water drops on structured superhydrophobic surfaces are known to cause an irreversible change from a slippy (Cassie-Baxter) to a sticky (Wenzel) regime.
Aussillous P, Berge B, D L Herbertson, G McHale, Herbertson D L, Léger L, M I Newton, McHale G, Muggele F, N J Shirtcliffe, Quere D, S J Elliott   +11 more
core   +1 more source

Natural Products as Geroprotective Modulators in Diabetic Nephropathy: A Mechanistic Framework Integrating Aging Hallmarks and the AMPK–SIRT1–Nrf2 Axis

Aging and Cancer, EarlyView.
Natural products target the aging kidney in diabetic nephropathy by restoring the AMPK–SIRT1–Nrf2 axis, reducing oxidative stress, inflammation, fibrosis, and cellular senescence while enhancing mitochondrial biogenesis and antioxidant defenses.
Sherif Hamidu, Latif Adams, Eunice Ampem‐Danso, Justice Kumi, Abigail Aning, Fatima Hamidu, Mustapha Abdul Mumin Mohammed, Ayuba Nii Darku Ankrah, Seth Kwabena Amponsah   +8 more
wiley   +1 more source

Comparison of Finite-Element-Based State-Space Models for PM Synchronous Machines [PDF]

, 2014
An interior-permanent-magnet motor is modeled by a combined analytical-numerical approach, in which the relationships between the stator currents and flux linkages are identified with static finite-element (FE) analysis.
Arkkio, Antero, Belahcen, Anouar, Hinkkanen, Marko, Lemesle, Marc-Antoine, Rasilo, Paavo   +4 more
core   +1 more source

Aging Is a Key Driver for Adult Acute Myeloid Leukemia

Aging and Cancer, EarlyView.
Acute myeloid leukemia (AML) is a classical age‐related hematologic malignancy, and a key driver of AML is aging, which profoundly regulates intrinsic factors such as genomic instability, epigenetic reprogramming, and metabolic dysregulation, and alters bone marrow microenvironment.
Rong Yin, Haojian Zhang
wiley   +1 more source

Research on Circulating Current Suppression Control of Parallel Inverters

Energies
Circulating current suppression can effectively improve the reliability and redundancy of parallel inverter systems. The mechanism and influencing factors of the low- and high-frequency zero-sequence circulating current (ZSCC) are analyzed in this study.
Yibiao Fan, Lixia Tong, Xiaoping Wang, Xiaowei Cai, Zhihe Fu, Junhui Zhou, Shuangmao Huang, Xingkui Mao   +7 more
doaj   +1 more source

Symmetric Components for Transient Regime Application in MV Systems

, 2007
International audienceIn order to apply advantageously the symmetrical components theory to SLG fault transients in distribution systems we take profit of similitude of transient components in faulty phase current and in zero sequence current on faulty ...
Huang, Wan-Ying, Kaczmarek, Robert
core   +2 more sources

A multifunctional dynamic voltage restorer for power quality improvement [PDF]

, 2018
Power quality is a major concern in electrical power systems. The power quality disturbances such as sags, swells, harmonic distortion and other interruptions have an impact on the electrical devices and machines and in severe cases can cause serious ...
Dung, Vo Tien, Goňo, Radomír, Leonowicz, Zbigniew   +2 more
core   +1 more source

Evaluation Of The Zero Sequence Impedance Of Overhead High Voltage Lines

, 2013
As known, the guard wires of overhead high voltage are usually grounded through the grounding systems of support and of the terminal stations. They do affect the zero sequence impedance value of the line, Z0, which is generally, calculated assuming that the wires guard are at ground potential.
openaire   +1 more source