Results 21 to 30 of about 15,879,076 (241)

Optimal PMU placement using topology transformation method in power systems

open access: yesJournal of Advanced Research, 2016
Optimal phasor measurement units (PMUs) placement involves the process of minimizing the number of PMUs needed while ensuring the entire power system completely observable.
Nadia H.A. Rahman, Ahmed F. Zobaa
doaj   +1 more source

Axial Turbine Performance Enhancement by Specific Fluid Injection

open access: yesAerospace, 2023
Extensively used in modern gas turbine engines in various applications, ranging from aerospace, marine and terrestrial propulsion to power generation and gas pumping, the axial flow turbines have been continuously updated and are now capable of high ...
Razvan Edmond Nicoara   +2 more
doaj   +1 more source

An effective method for the determination of the locking range of an injection-locked frequency divider [PDF]

open access: yes, 2008
The paper proposes a methodology for the determination of the locking range of an Injection-Locked Frequency Divider. The technique involves the use of the Warped Multi-time scale model and is applicable to oscillators in general.
Xu, Tao, Condon, Marissa
core   +2 more sources

Spotted hyena optimizer algorithm for capacitor allocation in radial distribution system with distributed generation and microgrid operation considering different load types

open access: yesScientific Reports, 2021
In this paper, the optimal allocation of constant and switchable capacitors is presented simultaneously in two operation modes, grid-connected and islanded, for a microgrid.
Amirreza Naderipour   +6 more
doaj   +1 more source

Injection amplitude guidance for impedance measurement in power systems [PDF]

open access: yes, 2023
Impedance measurement techniques based on small-signal injections in ac power system have been well developed but a gap in the analysis is that the selection of an injection amplitude is based only on experience.
Yue Zhu   +5 more
core   +1 more source

Thermal Stress Reduction of Power MOSFET with Dynamic Gate Voltage Control and Circulation Current Injection in Electric Drive Application

open access: yes, 2020
While operating an electric drive under different load conditions, power switch devices experience thermal stress which provokes wear-out failures and compromises lifetime. In this paper, a model-based dynamic gate voltage control strategy is proposed to
Wang, Lie   +10 more
core   +1 more source

Research on a maximum efficiency and constant voltage output control technology for wireless power transfer system

open access: yesDianzi Jishu Yingyong, 2020
Aiming at the problems of constant voltage output and maximum efficiency of wireless power transfer technology, a wireless power transfer technology based on energy injection and phase-shifted constant voltage control methods is proposed.
Shen Pengfei, Xie Yue
doaj   +1 more source

High-Precision Control Method for High-Power MRI Gradient Power Amplifiers [PDF]

open access: yes, 2022
In magnetic resonance imaging (MRI), high-power gradient power amplifiers (GPAs) are required to drive the gradient coils to generate strong and high-fidelity gradient fields.
Rietveld, Gert   +7 more
core   +2 more sources

Powder co-injection moulding [PDF]

open access: yes, 2000
A novel powder processing technique has been developed by combining conventional powder injection moulding with polymer co-injection moulding, to permit the in-situ surface engineering of metal or ceramic components as an integral step within the ...
Hanson, S. M. J.
core   +6 more sources

Energy consumption evaluation method of oilfield injection wells and its application

open access: yesYouqicang pingjia yu kaifa, 2020
In order to find the injection wells with abnormal energy consumption, the energy consumption evaluation has been carried out for them. Based on the law of energy conservation, the model of single-pump corresponding to single-well is established, and the
ZOU Yongli   +4 more
doaj  

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