Results 21 to 30 of about 934,727 (249)

Distributed Generation as Voltage Support for Single Wire Earth Return Systems [PDF]

open access: yes, 2004
Key issues for distributed generation (DG) inclusion in a distribution system include operation, control, protection, harmonics, and transients. This paper analyzes two of the main issues: operation and control for DG installation.
Kashem, Mohammad, Ledwich, Gerard
core   +2 more sources

Voltage controlled metamaterial [PDF]

open access: yesApplied Physics Letters, 2004
A tunable metamaterial based on conducting coils loaded by an electronic circuit containing a varicap diode has been demonstrated. The agility exceeds one octave inside the 100–500 MHz range. Permeability levels are significantly increased when the loop is loaded by a proper magnetic material.
Reynet, Olivier, Olivier, Acher
openaire   +2 more sources

A voltage-source inverter for microgrid applications with an inner current control loop and an outer voltage control loop [PDF]

open access: yes, 2009
Distributed generation (DG) units are commonly inter-faced to the grid by using voltage-source inverters (VSI’s). Extension of the control of these inverters allows to improve the power quality if the main power grid is disturbed or disconnected. In this
De Belie, Frederik   +4 more
core   +1 more source

A predictive control with flying capacitor balancing of a multicell active power filter [PDF]

open access: yes, 2008
Unlike traditional inverters, multicell inverters have the following advantages: lower switching frequency, high number of output levels, and less voltage constraints on the insulated-gate bipolar transistors.
Defaÿ, François   +2 more
core   +1 more source

Sequence Impedance Modeling and Optimization of MMC-HVDC Considering DC Voltage Control and Voltage Feedforward Control

open access: yesEnergies, 2022
The dynamic performance of the DC bus significantly influences the impedance characteristics of MMC and the system stability in a high-voltage direct current system.
Tong Huang, Xin Chen
doaj   +1 more source

Battery charging and discharging control of a hybrid energy system using microcontroller [PDF]

open access: yes, 2020
This study aims to control charging and discharging the battery for hybrid energy systems. The control system works by selecting the right energy source to supply voltage to the load. And also this control system can regulate charging and discharging the
Abu Bakar, Afarulrazi   +3 more
core   +3 more sources

Overview of Various Voltage Control Technologies for Wind Turbines and AC/DC Connection Systems

open access: yesEnergies, 2023
Wind power generation is one of the mainstream renewable energy resources. Voltage stability is as important as the frequency stability of a power system with a high penetration of wind power generation.
Yuan-Kang Wu   +2 more
doaj   +1 more source

Special Issue “Applications of Finite Element Modeling for Mechanical and Mechatronic Systems”

open access: yesApplied Sciences, 2021
Modern engineering practice requires advanced numerical modeling because, among other things, it reduces the costs associated with prototyping or predicting the occurrence of potentially dangerous situations during operation in certain defined conditions.
Marek Krawczuk, Magdalena Palacz
doaj   +1 more source

Transition from Islanded to grid-connected mode of microgrids with voltage-based droop control [PDF]

open access: yes, 2013
Microgrids are able to provide a coordinated integration of the increasing share of distributed generation (DG) units in the network. The primary control of the DG units is generally performed by droop-based control algorithms that avoid communication ...
De Kooning, Jeroen   +3 more
core   +1 more source

Voltage control of ferromagnetic resonance [PDF]

open access: yesJournal of Advanced Dielectrics, 2016
Voltage control of magnetism in multiferroics, where the ferromagnetism and ferroelectricity are simultaneously exhibiting, is of great importance to achieve compact, fast and energy efficient voltage controllable magnetic/microwave devices. Particularly,
Ziyao Zhou   +3 more
doaj   +1 more source

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