Results 21 to 30 of about 10,339,634 (299)

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

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

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.
Llor, Ana-Maria   +2 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

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

A hybrid multilevel converter for medium and high voltage applications [PDF]

open access: yes, 2010
This paper investigates the suitability of the hybrid multilevel converter for medium and high voltage application. The converter operation, modulation, and capacitor voltage balancing method are described in detail.
Ahmed, Khaled   +4 more
core   +3 more sources

Analysis and Suppression of High Speed Dv/Dt Induced False Turn-on in GaN HEMT Phase-Leg Topology

open access: yesIEEE Access, 2021
Gallium nitride high electron mobility transistor (GaN HEMT) is liable to gate false turn-on problem when the gate crosstalk voltage exceeds its threshold voltage in the widely adopted phase-leg topology due to its low threshold voltage and high ...
Xiao Long   +4 more
doaj   +1 more source

Operation of the Hybrid Photovoltaic-Battery System on the Electricity Market—Simulation, Real-Time Tests and Cost Analysis

open access: yesEnergies, 2020
This paper presents research on a hybrid photovoltaic-battery energy storage system, declaring its hourly production levels as a member of a balancing group submitting common scheduling unit to the day-ahead market.
Robert Małkowski   +2 more
doaj   +1 more source

An Adaptive Model Predictive Voltage Control for LC-Filtered Voltage Source Inverters

open access: yesApplied Sciences, 2021
The three-phase inductor and capacitor filter (LC)-filtered voltage source inverter (VSI) is subjected to uncertain and time-variant parameters and disturbances, e.g., due to aging, thermal effects, and load changes.
Hosein Gholami-Khesht   +2 more
doaj   +1 more source

Long-term voltage control

open access: yes, 2021
Long-term voltage control is aimed at maintaining the voltage magnitude of buses at the transmission and distribution levels within a given range and properly share the reactive power among available resources. Traditionally, longterm controllers are the voltage control of underload tap changer (ULTC) transformers that interface transmission and ...
Mohammed Ahsan Adib Murad   +3 more
openaire   +2 more sources

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