Results 51 to 60 of about 395,154 (260)

Three‐Level NF‐TDN Controller for AGC in Thermal‐Hydro‐Gas Power Systems Integrated With TCPS Under Nonlinear Conditions

open access: yesInternational Journal of Energy Research, Volume 2026, Issue 1, 2026.
Automatic generation control (AGC) is vital for preserving frequency and power balance in modern interconnected power systems (IPSs), which are increasingly challenged by nonlinear dynamics, parameter uncertainties, and unpredictable load variations.
Getaneh Mesfin Meseret, Mohammad Ghiasi
wiley   +1 more source

Studies of in-service and laboratory failures of metal-oxide distribution surge arresters [PDF]

open access: yes, 2003
We describe the findings from tests and inspections of arresters withdrawn from service, the results of laboratory studies with multipulse lightning currents and high temporary over-voltages, and comparisons of in-service and laboratory failure modes. We
Darveniza, M., Saha, T. K., Wright, S.
core  

Analysis of the failure mechanism of ZnO varistors influenced by high‐resistance media based on multi‐field coupling simulation

open access: yesHigh Voltage, Volume 10, Issue 3, Page 673-679, June 2025.
Abstract This study focuses on the distribution of high‐resistance media (pores and spinels) within ZnO $\text{ZnO}$ varistors and explores the mechanical and electrical failure mechanisms of varistors under different pulse actions. Micro‐CT technology revealed that the proportion of high‐resistance media in the edge area is much higher than in the ...
Pengfei Meng   +7 more
wiley   +1 more source

Electro-Thermal Modeling of Metal-Oxide Arrester under Power Frequency Applied Voltages

open access: yesEnergies, 2018
Metal-oxide arresters (MOAs) are used to absorb the electrical energy resulting from overvoltages in power systems. However, temperature rises caused by the absorbed energy can lead to the electrothermal failure of MOAs.
Jiazheng Lu   +3 more
doaj   +1 more source

An intelligent protection scheme for series-compensated transmission lines connecting large-scale wind farms

open access: yesFrontiers in Energy Research, 2023
Series-compensated transmission lines (SCTLs) are increasingly preferred for transmitting bulk amounts of electricity generated from the present-day large-scale wind farm to the utility grid due to several technical and economic benefits. However, when a
M. S. Prabhu   +4 more
doaj   +1 more source

Control strategy of novel hybrid commutated converter based on reverse blocking integrated gate commutated thyristor for commutation failure mitigation

open access: yesHigh Voltage, Volume 10, Issue 3, Page 546-554, June 2025.
Abstract Commutation failure (CF) is an inherent problem faced by line commutated converter high voltage direct current (LCC‐HVDC) technology. To completely solve the problem of CF, we have proposed a novel hybrid commutated converter (HCC) technology based on reverse blocking integrated gate commutated thyristor, which can utilise two methods for ...
Zongze Wang   +7 more
wiley   +1 more source

A novel embedded voltage‐clamped circuit for multilevel modular converters submodule to suppress very fast transient overvoltage

open access: yesHigh Voltage
The submodule in multilevel modular converters experiences a very fast transient overvoltage (VFTO) during switch operation of gas‐insulated switchgear, which also results in overvoltage on power devices, such as thyristors and insulated gate bipolar ...
Hong Shen   +7 more
doaj   +1 more source

Comparison of Impact on Turbine Shafts Torsional Behavior for Integration of Two Types of Wind Farm into a Series-Compensated Transmission System

open access: yesEnergies, 2022
Deep decarbonization is the goal of modern power systems, so it is inevitable that large-scale wind farms will be integrated into systems. This also gives rise to many problems, which have been studied in detail in the literature.
Chi Hsiang Lin
doaj   +1 more source

Calculation model by Voronoi network and verification of zinc oxide varistor considering conduction mechanism

open access: yesInternational Journal of Ceramic Engineering &Science, Volume 7, Issue 2, March 2025.
In this paper, a method to improve the performance of varistor with the help of computational model was presented and verified by experiments. Abstract This paper investigates the impact of the microstructure of zinc oxide varistor ceramics on their electrical properties.
Xiao Lei   +5 more
wiley   +1 more source

Advancements in wearable heart sounds devices for the monitoring of cardiovascular diseases

open access: yesSmartMat, Volume 6, Issue 1, February 2025.
This article presents the recent advancements in wearable and flexible heart sound devices, focusing on their mechanics, types of sensors, flexible sensing materials, and prospective denoising techniques. Furthermore, the potential applications of heart sounds for the monitoring of cardiovascular diseases are reviewed as well along with its future ...
Rafi u Shan Ahmad   +5 more
wiley   +1 more source

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