Results 31 to 40 of about 425,448 (355)
Modeling electrochemical impedance spectroscopy [PDF]
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
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
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
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
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
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
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
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
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
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

