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Modeling electrochemical impedance spectroscopy [PDF]

open access: yesCurrent Opinion in Electrochemistry, 2019
Abstract Electrochemical impedance spectroscopy (EIS) is a powerful technique that is used for characterizing electrochemical systems. The EIS data can be correlated with many key physical properties, including rates of diffusion and reaction, and microstructural features.
openaire   +2 more sources

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

Thermal correction to the Casimir force, radiative heat transfer, and an experiment

open access: yes, 2007
The low-temperature asymptotic expressions for the Casimir interaction between two real metals described by Leontovich surface impedance are obtained in the framework of thermal quantum field theory.
A. Lambrecht   +90 more
core   +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

Impedance Modeling and Stability Analysis of VSG Controlled Grid-Connected Converters with Cascaded Inner Control Loop

open access: yesEnergies, 2020
This paper develops the impedance models of grid-connected converters under the virtual synchronous generator (VSG) strategy with a cascaded inner control loop and analyzes the system stability of VSG controlled converters with different kinds of weak ...
Yunyang Xu   +3 more
doaj   +1 more source

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