Results 31 to 40 of about 8,309,634 (293)

КОМПЕНСАТОР РЕАКТИВНОЇ ПОТУЖНОСТІ З ПЛАВНИМ РЕГУЛЮВАННЯМ

Elektrotehnìka ta Elektroenergetika, 2014
Розглянуто широко використовувані пристрої компенсації реактивної потужності (ПКРМ) – батареї конденсаторів (БК) з тиристорним перемиканням, проведено аналіз їх недоліків: вплив вищих гармонік при несинусоїдальній напрузі мережі, неможливість забезпечити
V. V. Burlaka, S. V. Gulakov, S. K. Podnebennaya, O. S. Savenko   +3 more
doaj   +1 more source

Different control strategies applied to series active filters [PDF]

Renewable Energy and Power Quality Journal, 2007
The series active filters are used to compensate loads of the kind voltage harmonics source. In this paper three different control strategies have been applied to a series active filter. The first is based on that the filter voltage must be proportional to the harmonic of the source current.
Pérez Litrán, Salvador, Salmerón Revuelta, Patricio, Rodríguez Vázquez, Jesús, Sánchez Herrera, María Reyes   +3 more
openaire   +2 more sources

Active Damping in Series Connected Power Modules with Continuous Output Voltage

Power Electronics and Drives, 2021
This paper presents a modular and scalable power electronics concept for motor control with continuous output voltage. In contrast to multilevel concepts, modules with continuous output voltage are connected in series.
Ulmer Sabrina, Schullerus Gernot, Sönmez Ertugrul   +2 more
doaj   +1 more source

INVESTIGATION OF THE INFLUENCE OF THE TRANSFORMER OF A SERIES ACTIVE FILTER ON THE QUALITY OF VOLTAGE

Elektrotehnìka ta Elektroenergetika, 2018
Purpose. Investigate the features of using a series power transformer for the implementation of longitudinal compensation. Methodology. Methods of solving systems of differential equations of the first order, methods of matrix transformations, methods ...
S. S. BONDARENKO, О. V. BIALOBRZHESKYI, R. V. VLASENKO   +2 more
doaj   +1 more source

Trend Extraction From Time Series With Structural Breaks and Missing Observations [PDF]

, 2008
Trend extraction from time series is often performed by using the filter proposed by Leser (1961), also known as the Hodrick-Prescott filter. Practical problems arise, however, if the time series contains structural breaks (as produced by German ...
Schlicht, Ekkehart
core   +1 more source

An Improved Control Method of DC Voltage for Series Hybrid Active Power Filter

Energies
DC voltage is one of the important parameters of active power filters. Since the series hybrid active power filter does not withstand the fundamental voltage, it cannot absorb energy from the power grid, making it too difficult to control its DC voltage.
Jianben Liu, Yuan Ni, Jun Zhao
doaj   +1 more source

АДАПТИВНЕ УПРАВЛІННЯ РЕЛЕЙНИМ РЕГУЛЯТОРОМ ТРИФАЗНОГО СИЛОВОГО АКТИВНОГО ФІЛЬТРА

Elektrotehnìka ta Elektroenergetika, 2014
Current control relay of three-phase active power filter provides the toggle power switches, when the current error exceeds a fixed value (hysteresis band), while the frequency of setting options is variable.
R. V. Vlasenko, O. V. Bialobrzeski
doaj   +1 more source

Engineering peptides into antibodies—opportunities and strategies for therapeutic innovation

FEBS Letters, EarlyView.
Peptides and antibodies occupy complementary therapeutic niches. Peptides recognize difficult targets in a compact format, while antibodies add specificity, long half‐life, and effector functions. This review examines strategies that merge both modalities—peptide grafting into loops, terminal and Fc fusions, and bioconjugation—highlighting how ...
Jinling Wang, Ruslana Romaniuk, Hristo L. Svilenov   +2 more
wiley   +1 more source

Self-Supported Transformerless Series Active Power Filter for Wide-Range Load Voltage Compensation

Eletrônica de Potência
This paper investigates a three-phase transformerless series active power filter based on open-end connections. The studied system was designed to mitigate power quality issues, including voltage harmonics, as well as balanced and unbalanced voltage ...
Aléssio T. S. S. Santos, Cursino B. Jacobina, Jean T. Cardoso, Alan S. Felinto   +3 more
doaj   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

FEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge, Vivian Pogenberg, Alexander Baumgart, Bente Siebels, Hartmut Schlüter, Michael Hecht‐Bucher, Aymelt Itzen   +6 more
wiley   +1 more source