Results 21 to 30 of about 181 (134)

Reduction Reactive Power and Collapse Voltage Using Series Capacitors Compensation in Sudden Change Loads of Transmission Lines [PDF]

open access: yesEngineering and Technology Journal, 2012
The continuous increase of disturbances on the interconnected electric power system resulting in its inability to reliably meet demands. This paper presents an application of a series capacitor compensation in transmission line and shunt reactors ...
Hussein Thani Rishag
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

Service Limits for Metal Oxide Varistors Having Cylindrical Symmetry as Function of the Ambient Temperature

open access: yes, 2022
This article presents an original experimental method applied to assess the stability limits of a given Metal Oxide Varistor (MOV), with cylindrical symmetry (cylinder or disk shape), as a direct relation between the ambient temperature and the service ...
Petru Andea   +4 more
core   +1 more source

An energy absorbing method for hybrid mmcs to avoid full-bridge submodule overvoltage during DC fault blocking [PDF]

open access: yes, 2022
The full-bridge submodules (FB-SMs) in hybrid modular multilevel converters need to absorb the enormous energy stored in dc side and arm inductors during dc fault blocking, which may lead to severe overvoltage.
Xiong, Jian   +5 more
core   +1 more source

Recovery of Antimony: A Laboratory Study on the Thermal Decomposition and Carbothermal Reduction of Sb(III), Bi(III), Zn(II) Oxides, and Antimony Compounds from Metal Oxide Varistors [PDF]

open access: yes, 2018
As antimony is typically present in industrial and commercial products only in small amounts, the concentration of antimony in waste types is low and a limited amount of antimony is currently recycled. One product relatively rich in antimony is the metal
Steenari, Britt-Marie,   +8 more
core   +1 more source

直流开断中MOV均衡特性选配方法研究

open access: yesGaoya dianqi, 2023
金属氧化物压敏电阻(metal oxide varistor,MOV)广泛应用于各种直流断路器中,用于抑制过电压、系统能量耗散与开断电压建立。受目前加工工艺限制,单MOV阀片通流能力有限,故断路器中多采用多柱并联结构。柱间电流分配不均会导致局部阀片超负荷耗能,造成开断失败甚至设备损坏。文中基于实验测量建立了一种直流开断工况下的MOV电气模型,基于该模型提出了MOV阀片均流选配方法。经实验验证,传统基于雷电冲击测试方法选配的MOV在直流开断工况的均流特性不能完全满足要求 ...
龙辰   +7 more
doaj  

Two basic ways to realise DC circuit breakers

open access: yesThe Journal of Engineering, 2019
As a key element of the DC grid, the technology of DC circuit breakers (DCCBs) still have difficulty to be widely used due to its large cost and volume. This paper studies the basic principle and its realisation methods for DCCBs.
Zheng Xu   +3 more
doaj   +1 more source

Lightning protection for power transformers of Aqaba Thermal Power Station

open access: yesArchives of Electrical Engineering, 2020
In this paper, a study of the lightning phenomenon and its harmful effect on Aqaba Thermal Power Station (ATPS), located in the south-western border of Jordan, is presented using the Electromagnetic Transients Program – Alternative Transients Program ...
Wael Fawzi Abu Shehab   +2 more
doaj   +1 more source

Determining the effect of bismuth oxide on the microstructure and electrical response of cold‐sintered ZnO varistors

open access: yesJournal of the American Ceramic Society, Volume 109, Issue 1, January 2026.
Abstract Microstructure homogeneity and grain size reduction are needed to ensure the current uniformity and reliability required in metal oxide varistors for DC circuit breakers. Cold sintering (CS)–a low‐temperature digestive liquid and high‐pressure densification process–has previously shown reduced grain growth, but it is not clear how the lower ...
Kayla Y. Chuong   +5 more
wiley   +1 more source

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

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