Results 51 to 60 of about 262,158 (170)

Automatic transponder [PDF]

open access: yes, 1977
A method and apparatus for the automatic, remote measurement of the internal delay time of a transponder at the time of operation is provided. A small portion of the transmitted signal of the transponder is converted to the receive signal frequency of ...
Anderson, R. E.   +2 more
core   +1 more source

Fast Reset and Suppressing Spontaneous Emission of a Superconducting Qubit

open access: yes, 2010
Spontaneous emission through a coupled cavity can be a significant decay channel for qubits in circuit quantum electrodynamics. We present a circuit design that effectively eliminates spontaneous emission due to the Purcell effect while maintaining ...
Chow, J. M.   +7 more
core   +1 more source

Double Circuit EHV Transmission Lines Fault Location with RBF Based Support Vector Machine and Reconstructed Input Scaled Conjugate Gradient Based Neural Network [PDF]

open access: yesInternational Journal of Computational Intelligence Systems, 2015
A new algorithm is developed to enhance the solution for the problems associated with double circuit transmission lines for the mutual coupling between the two circuits under fault conditions and which is highly variable in nature.
K. Gayathri, N. Kumarappan
doaj   +1 more source

Research on the Design of Operating Condition of Multi-Resistance Superconducting DC Current Limiter

open access: yes南方能源建设, 2023
[Introduction] The working principle of the resistive superconducting current limiter is based on the zero resistance effect of the superconductor, which is connected in series in the line and basically has no resistance during normal operation. When the
Qin YIN, Jinchuan GUO
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

A fault locating method for multi-branch hybrid transmission lines in wind farm based on redundancy parameter estimation

open access: yesJournal of Modern Power Systems and Clean Energy, 2019
In order to solve the problem of “abandoned” wind caused by short circuit faults in a wind farm, a wind farm fault locating method based on redundancy parameter estimation is proposed.
Ke Zhang, Yongli Zhu, Xuechun Liu
doaj   +1 more source

An Analytical Evaluation of the Shielding Effectiveness of Enclosures Containing Complex Apertures

open access: yesIEEE Access, 2021
Analytical methods are significantly useful tools for engineers in computational modeling. These methods provide fast simulations, while preserving physical meaning. In this paper, a full analytical formulation is developed based on the circuit approach,
Amelie Rabat   +3 more
doaj   +1 more source

Short circuit study of fixed speed wind turbines with STATCOM in distribution networks [PDF]

open access: yes, 2015
The increased penetration of wind farm in distribution networks has brought changes in the performance of the whole system. Such disadvantages when connecting one of these distributed generation sources is reduced voltage and power stability of the AC ...
Darwish, M, Naain, MM, Zobaa, AF
core   +1 more source

Locating Fault on Transmission Line with Static Var Compensator Based on Phasor Measurement Unit

open access: yesEnergies, 2018
The flexible alternating current transmission systems (FACTS) have been widely used in modern power systems. Because of the presence of the FACTS devices, distance relays in transmission lines may inaccurately locate fault locations.
Ngo Minh Khoa, Doan Duc Tung
doaj   +1 more source

An on-line training radial basis function neural network for optimum operation of the UPFC [PDF]

open access: yes, 2010
The concept of Flexible A.C. Transmission Systems (FACTS) technology was developed to enhance the performance of electric power networks (both in steady-state and transient-state) and to make better utilization of existing power transmission facilities ...
Chen   +10 more
core   +3 more sources

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