Results 21 to 30 of about 3,882,562 (249)

VSG Control Strategy Incorporating Voltage Inertia and Virtual Impedance for Microgrids

open access: yesEnergies, 2020
Virtual synchronous generator (VSG) control lacks voltage inertia and powerful decoupling capabilities. The voltage of the distributed generator (DG) unit controlled by the VSG will be easily affected by power fluctuations and high-frequency noise, and ...
Zipeng Ke   +6 more
doaj   +1 more source

Proportional–Resonant Controller Based on Virtual Impedance for Harmonic Suppression of ESS-UPS System

open access: yesIEEE Access, 2023
A proportional–resonant controller based on the output impedance is proposed for a single-phase full-bridge inverter offering harmonic suppression of uninterruptible power supply with an energy storage system.
Jehyuk Won, Young-Sang Ko
doaj   +1 more source

Improving synchronization stability of grid connected converters by virtual impedance

open access: yesIET Generation, Transmission & Distribution, 2021
With the increasing penetration of inverter based distributed generation, recent grid codes do not permit the disconnection of converters as soon as fault happens.
Omid Abdoli   +2 more
doaj   +1 more source

Implementation method of hybrid simulation interface for active distribution network based on virtual line compensation [PDF]

open access: yes电力工程技术, 2022
Digital physical hybrid simulation is an effective means of active distribution network simulation and analysis,and the interface algorithm is the key to ensuring the stability and accuracy of the system. Aiming at the problem that the existing interface
E TAO, YIN Zhongdong, WANG Qunfei
doaj   +1 more source

Skew Incidence on Concave Wedge With Anisotropic Surface Impedance [PDF]

open access: yes, 2012
The diffraction of a plane wave at skew incidence by an arbitrary-angled concave wedge with anisotropic impedance faces is studied. Concave wedges are of interest in wireless propagation models, in particular on modeling buildings and reflectors.
Lombardi, Guido, G. Lombardi
core   +1 more source

Reduced RLC Impedance Circuit Model of Electric Vehicle DC Charging Station

open access: yes南方能源建设, 2023
[Introduction] The potential positive feedback of virtual inertia and damping control (VIDC) may exacerbate the interaction within the control loop, causing low-frequency oscillation of bus voltage and disrupting the stability of electric vehicle DC ...
Gang LIN, Ningyi DAI
doaj   +1 more source

Reducing latency when using Virtual Reality for teaching in sport [PDF]

open access: yes, 2008
Latency is a frequently cited shortcoming of Virtual Reality (VR) applications. To compensate for excessive latency, prediction mechanisms may use sophisticated mathematical algorithms, which may not be appropriate for complex virtual teaching ...
Gilbert, Lester   +2 more
core   +2 more sources

Adaptive Virtual Impedance Droop Control Based on Consensus Control of Reactive Current

open access: yesEnergies, 2018
It is difficult to achieve accurate distribution of reactive power based on conventional droop control due to the line impedance mismatch in an islanded microgrid.
Zhilin Lyu   +4 more
doaj   +1 more source

Communicationless Adaptive Control Strategy for Effective Reactive Power Sharing in a Grid-Independent AC Microgrid

open access: yesFrontiers in Energy Research, 2022
The microgrid (MG) ensures a reliable power supply as it can work in a grid-independent mode. This mode requires a coordinated control strategy among distributed generators (DGs). One major challenge in a grid-independent MG is the reactive power-sharing
Suchitra D   +6 more
doaj   +1 more source

Determination of the interaction impedance of helix slow-wave structures. [PDF]

open access: yes, 2000
The computer simulation of helix travelling-wave tubes requires accurate information about the phase velocity, interaction impedance and attenuation of the helix slow wave structure at each frequency.
R.G. Carter, Carter, R. G.
core   +4 more sources

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