Results 21 to 30 of about 24,705,416 (306)

Quantitative Analysis of AC/DC Side Harmonic Transfer Characteristics for Modular Multilevel Converter and Suppression Measures

open access: yesIEEE Access, 2020
MMC (Modular Multilevel Converter) is the preferred topology for renewable energy delivery, but renewable energy resources, such as wind farms, contains much harmonic components.
Bo Yue   +6 more
doaj   +1 more source

An Enhanced Control Strategy for Doubly-Fed Induction Generators Based on a Virtual Harmonic Resistor and Capacitor under Nonlinear Load Conditions

open access: yesEnergies, 2018
Harmonic amplification for doubly-fed induction generator wind turbine systems (DFIG WTSs) will occur due to the existence of non-linear loads and reactive power compensation installation, and grid voltage and total grid current at the point of common ...
Zhen Xie, Lifan Niu, Xing Zhang
doaj   +1 more source

A myoelectric prosthetic hand with muscle synergy–based motion determination and impedance model–based biomimetic control

open access: yesScience Robotics, 2019
Human muscle synergy– and impedance model–based control enables accurate and natural finger motions of a 3D-printed myoelectric hand. Prosthetic hands are prescribed to patients who have suffered an amputation of the upper limb due to an accident or a ...
A. Furui   +7 more
semanticscholar   +1 more source

A Microgrid Stability Improvement Method by Applying Virtual Adaptive Resistor Paralleling with a Grid-Connected Inverter

open access: yesEnergies
An increase in renewable energy generation in the microgrid can cause voltage oscillation problems. To address this issue, an equivalent circuit of the microgrid was established, including a synchronous generator, grid-connected inverter, and constant ...
Mingming Shi   +4 more
doaj   +1 more source

Analysis of the Current Electric Battery Models for Electric Vehicle Simulation

open access: yesEnergies, 2019
Electric vehicles (EVs) are a promising technology to reduce emissions, but its development enormously depends on the technology used in batteries. Nowadays, batteries based on lithium-ion (Li-Ion) seems to be the most suitable for traction, especially ...
Gaizka Saldaña   +4 more
doaj   +1 more source

Stability analysis of grid-following converter considering DC side dynamics

open access: yes电力工程技术
DC side dynamics are ignored in most of the research on grid-connected converter, which is dealt as a constant voltage source. In this case, the analysis result of small-signal stability is affected to some extent.
ZHAO Yujing   +3 more
doaj   +1 more source

Stability Assessment of A Radial Grid With Power Converters

open access: yesIEEE Open Journal of Power Electronics, 2022
The increase proportion of power converters causes stability problems in the radial grid. To address these issues, this paper firstly proposes a unified modeling procedure and applies it to two types of converters. Secondly, the impedance models are used
Xingqi Liu   +7 more
doaj   +1 more source

Low-Frequency Stability Analysis of Power Electronic Traction Transformer Based Train-Network System

open access: yesCSEE Journal of Power and Energy Systems
Power electronic traction transformers (PETTs) will be increasingly applied to locomotives in the future for their small volume and light weight. However, similar to conventional trains, PETTs behave as constant power loads and may cause low-frequency ...
Yi Hong   +3 more
doaj   +1 more source

Impedance Modeling and Analysis for DFIG-Based Wind Farm in SSO Studies

open access: yesIEEE Access, 2020
Several models were developed in the literatures for studying the system impedance characteristics during sub-synchronous oscillations (SSO). However, the doubly-fed induction generator (DFIG) impedance presents a 2 × 2 matrix with the frequency ...
Ping Ju   +3 more
doaj   +1 more source

Electrochemical Impedance Spectroscopy—A Tutorial

open access: yesACS Measurement Science Au, 2023
This tutorial provides the theoretical background, the principles, and applications of Electrochemical Impedance Spectroscopy (EIS) in various research and technological sectors. The text has been organized in 17 sections starting with basic knowledge on
A. Lazanas, M. Prodromidis
semanticscholar   +1 more source

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