Results 41 to 50 of about 1,446,171 (254)

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

Analysis of equivalent circuit models in lithium-ion batteries

open access: yesAIP Advances, 2018
This study investigates lithium-ion (Li-ion) battery discharge at a constant current by comparing equivalent circuit simulation data with experimental data. The simulations employ Thévenin equivalent circuit models consisting of a resistance, capacitance,
Hyun Woo You   +4 more
doaj   +1 more source

Integrated T&D Voltage Stability Assessment Considering Impact of DERs and Distribution Network Topology

open access: yesIEEE Access, 2023
Electric distribution systems are going through a major upgrade with increasing penetration of distributed energy resources (DERs) and impacting transmission system operational analysis.
Syed Muhammad Hur Rizvi   +1 more
doaj   +1 more source

Bridge Average Value Model of Modular Multilevel Converter

open access: yesZhongguo dianli, 2019
The speed-up simulation model of modular multilevel converter (MMC) is the basis for the research of voltage-source converter high-voltage direct-current (VSC-HVDC) system. Among many models, the bridge Thevenin model of MMC is the most widely used.
Ning CHEN, Lei QI, Meng BAO, Xiang CUI
doaj   +1 more source

Online Thevenin parameter tracking using synchrophasor data [PDF]

open access: yes, 2017
There is significant interest in smart grid analytics based on phasor measurement data. One application is estima- tion of the Thevenin equivalent model of the grid from local measurements.
McEachern, Alex   +13 more
core   +1 more source

State of Charge Estimation of Lithium-Ion Batteries Over Wide Temperature Range Using Unscented Kalman Filter

open access: yesIEEE Access, 2018
With the development of electric vehicles in recent years, lithium-ion batteries have been widely used. Accurate state of charge (SOC) estimation plays an important role in the safety of electric vehicles.
Xiaogang Wu, Xuefeng Li, Jiuyu Du
doaj   +1 more source

Study on Thévenin Equivalent Circuit Modeling of Zinc-Nickel Single-Flow Battery

open access: yesInternational Journal of Electrochemical Science, 2018
Based on the working principle of a zinc–nickel single-flow battery (ZNB), an improved Thévenin equivalent circuit model is proposed in this paper. According to the experimental data of a 100-A pulsed discharge of a ZNB, the parameters of the modified ...
Shouguang Yao   +4 more
doaj   +1 more source

Equivalent modeling study of aviation lithium-ion batteries

open access: yes, 2023
To be able to accurately describe the dynamic characteristics of the aviation lithium-ion batteries and to accurately estimate its state of charge and state of health, this chapter takes into account the differences between charge and discharge open ...
Guerrero, Josep M.; id_orcid   +5 more
core   +1 more source

Unified Power Conservative Equivalent Circuit for DC Networks

open access: yesIEEE Access, 2020
This article introduces a new equivalent circuit for linear direct current networks consisting of independent voltage and current sources, and resistors, which represents all the power dissipated internally in the resistors.
Ivo Barbi
doaj   +1 more source

A Review of Failure Modes and Safety Strategies of Lithium‐Ion Batteries from Materials to Systems

open access: yesAdvanced Science, EarlyView.
A cascade‐aware framework is presented for lithium‐ion battery safety, linking thermal runaway initiation, acceleration, runaway reaction, and propagation with material‐, cell/pack‐, and system‐level interventions. By integrating failure mechanisms, quantitative safety indicators, and staged interception strategies, this review highlights how safer ...
Jin Hyeok Yang   +8 more
wiley   +1 more source

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