Results 21 to 30 of about 1,256,437 (255)

An Accurate Time Constant Parameter Determination Method for the Varying Condition Equivalent Circuit Model of Lithium Batteries

open access: yesEnergies, 2020
An accurate estimation of the state of charge for lithium battery depends on an accurate identification of the battery model parameters. In order to identify the polarization resistance and polarization capacitance in a Thevenin equivalent circuit model ...
Liang Zhang   +5 more
doaj   +1 more source

A Self-Calibration SOC Estimation Method for Lithium-Ion Battery

open access: yesIEEE Access, 2023
Accurate state of charge (SOC) estimation is essential for the battery management system (BMS). In engineering, inappropriate selection of equivalent circuit model (ECM) and model parameters is common for lithium-ion batteries.
Yueshuai Fu, Huimin Fu
doaj   +1 more source

Communication-less adaptive directional overcurrent protection strategy considering islanded mode detection in active distribution networks

open access: yesResults in Engineering, 2023
The integration of distributed energy resources (DERs) in electric distribution networks originates the Active Distribution Networks (ADNs). The presence of DERs introduces challenges to conventional protection schemes due to bidirectional power flows ...
J. Orozco-Álvarez   +2 more
doaj   +1 more source

A Novel Decomposition for Control of DC Circuits and Grid Models with Heterogeneous Energy Sources [PDF]

open access: yes, 2017
The way in which electric power depends on the topology of circuits with mixed voltage and current sources is examined. The power flowing in any steady-state DC circuit is shown to depend on a minimal set of key variables called fundamental node voltages
barrows   +4 more
core   +3 more sources

Thévenin Equivalent Circuits for Modeling Coupled Common/Differential-Mode Behavior in Power Electronic Systems

open access: yesIEEE Open Access Journal of Power and Energy, 2021
Modeling the unintended common- and differential-mode (CM and DM) behavior of multi-converter power electronic-based systems can be a challenge. Chief among the issues is the need for detailed knowledge of the converter hardware to determine model ...
Timothy J. Donnelly   +3 more
semanticscholar   +1 more source

Static Voltage Stability Assessment of Ethiopian power System Using Normalized Active Power Margin Index

open access: yesEAI Endorsed Transactions on Energy Web, 2022
Voltage stability assessments, made so far on the Ethiopian electric power system (EEP), are limited both in number and in methodology. Here, in this paper the static voltage stability of the Ethiopian power system is investigated using an index called ...
Ahadu Hilawie, Fekadu Shewarega
doaj   +1 more source

Cost-effective applications of power factor correction for nonlinear loads [PDF]

open access: yes, 2005
This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Brunel University's products or services. Internal or personal use of this material is permitted.
Zobaa, AF
core   +1 more source

Electric vehicle battery model identification and state of charge estimation in real world driving cycles [PDF]

open access: yes, 2015
This paper describes a study demonstrating a new method of state-of-charge (SoC) estimation for batteries in real-world electric vehicle applications. This method combines realtime model identification with an adaptive neuro-fuzzy inference system (ANFIS)
Auger, Daniel J.   +2 more
core   +1 more source

Modified Impedance-Based OOS Protection Based on On-Line Thévenin Equivalent Estimation

open access: yesIranian Journal of Electrical and Electronic Engineering, 2021
In this paper, a novel approach based on the Thévenin tracing is presented to modified conventional impedance-based out-of-step (OOS) protection. In conventional approach, the OOS detection is done by measuring positive sequence impedance.
S. R. Hosseini   +2 more
doaj  

On the construction of a digital transfer function from its real part on unit circle [PDF]

open access: yes, 1982
It is shown in this correspondence that the system function H(z) of a linear time invariant (LTI) causal digital filter with real impulse response coefficients can be obtained from the real part of its frequency response HR(ejω) given in the form of a ...
Mitra, S. K., Vaidyanathan, P. P.
core   +1 more source

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