Results 21 to 30 of about 253,873 (303)

Harmonic Stability Assessment of Commercially Available Single-Phase Photovoltaic Inverters Considering Operating-Point Dependencies

open access: yesSolar, 2023
The growth of renewables in the energy sector, e.g., in public low-voltage networks, leads to an increasing share of installed power electronic devices, e.g., inverters for photovoltaic applications. To rely on these devices, suitable analyses have to be
Elias Kaufhold   +3 more
doaj   +1 more source

One-Quadrant Switched-Mode Power Converters [PDF]

open access: yes, 2016
This article presents the main topics related to one-quadrant power converters. The basic topologies are analysed and a simple methodology to obtain the steady-state output-input voltage ratio is set out.
Petrocelli, R.
core   +3 more sources

Suppression of Second-Order Harmonic Current for Droop-Controlled Distributed Energy Resource Converters in DC Microgrids [PDF]

open access: yes, 2020
Droop-controlled distributed energy resource converters in dc microgrids usually show low output impedances. When coupled with ac systems, second-order harmonics typically appear on the dc-bus voltage, causing significant harmonic currents at the ...
Caldognetto, Tommaso   +3 more
core   +1 more source

Voltage Quality Enhancement of Grid-Integrated PV System Using Battery-Based Dynamic Voltage Restorer

open access: yesEnergies, 2020
The advancement of power electronic-based sensitive loads drives the power utilities’ devotion to power quality issues. The voltage disturbance could be happening due to fault conditions, switching of loads, energizing of transformers, or integration of ...
Emiyamrew Minaye Molla, Cheng-Chien Kuo
doaj   +1 more source

Passive Power Filters [PDF]

open access: yes, 2016
Power converters require passive low-pass filters which are capable of reducing voltage ripples effectively. In contrast to signal filters, the components of power filters must carry large currents or withstand large voltages, respectively. In this paper,
Künzi, R.
core   +3 more sources

LABORATORY STAND FOR SMALL WIND TURBINE SIMULATION

open access: yesInformatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, 2017
The article presents a concept of the laboratory stand for wind turbine simulation, built on the basis of cage induction motor, supplied from a frequency converter.
Wojciech Matelski   +2 more
doaj   +1 more source

Analysis of self-oscillating DC-DC resonant power converters using a hysteretic relay [PDF]

open access: yes, 2007
The paper presents a technique for exciting resonant DC-DC converters in a self-oscillating manner. The analysis necessary to predict the behaviour of such converters is also given.
Bingham, Chris   +4 more
core   +1 more source

Review of Control Techniques for Wind Energy Systems

open access: yesEnergies, 2020
In recent years, penetration of renewable energy resources into the power grid has increased significantly. Wind, as a renewable, clean, and abundantly available source of energy, has an important share in the energy mix.
Hooman Ghaffarzadeh, Ali Mehrizi-Sani
doaj   +1 more source

Analysis of an On-Line Stability Monitoring Approach for DC Microgrid Power Converters [PDF]

open access: yes, 2019
An online approach to evaluate and monitor the stability margins of dc microgrid power converters is presented in this paper. The discussed online stability monitoring technique is based on the Middlebrook's loop-gain measurement technique, adapted to ...
Caldognetto, Tommaso   +4 more
core   +1 more source

Switching Performance of a 3.3-kV SiC Hybrid Power Module for Railcar Converters

open access: yesIEEE Access, 2020
The unique properties of a SiC hybrid 3.3-kV/450-A half-bridge IGBT power module which is designed for enhanced reliability of railcar converters are presented in this paper.
Xiang Li   +8 more
doaj   +1 more source

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