Results 61 to 70 of about 262,158 (170)

Distance Protection for Outgoing Line of Photovoltaic Station Based on Superconducting Magnetic Energy Storage

open access: yesZhongguo dianli
Affected by the control strategy of photovoltaic inverters, the photovoltaic station has weak-feedback and current-phase-controlled characteristics.
Zhihui DAI   +4 more
doaj   +1 more source

Permittivity measurement of thermoplastic composites at elevated temperature [PDF]

open access: yes, 2001
[Abstract]: The material properties of greatest importance in microwave processing of a dielectric are the complex relative permittivity Epsilon = Epsilon' - jEpsilon'', and the loss tangent, tan Delta = Epsilon'/Epsilon''.
Ball, James A. R.   +3 more
core   +1 more source

Analysis for DC transmission line harmonics originated from AC transformer inrush current and improved method for DC harmonic protection

open access: yesThe Journal of Engineering, 2019
Large-scale electricity has fed into Central and Southern China through DC transmission lines. Any one of the DC transmission lines suddenly outage will result in a large proportion of power-shortage.
Wenbin Cao   +6 more
doaj   +1 more source

A mathematical method for local defects and faults identification of 10 kV three‐core cable based on input impedance spectrum

open access: yesIET Science, Measurement & Technology, 2022
Due to the strong coupling among the conductors of 10 kV three‐core armored cables and the difficulty in identifying its defects and fault types, a method is proposed based on the input impedance spectrum. Firstly, the phase mode transformation matrix of
Yan Wang   +3 more
doaj   +1 more source

The optimal passive filters to minimize voltage harmonic distortion at a load bus [PDF]

open access: yes, 2005
This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Brunel University's products or services. Internal or personal use of this material is permitted.
Zobaa, AF
core   +1 more source

Comparison between two VSC-HVDC transmission systems technologies : modular and neutral point clamped multilevel converter [PDF]

open access: yes, 2009
The paper presents a detail comparison between two voltage source converter high voltage dc transmission systems, the first is based on neutral point-clamped (also known as HVDC-Light) and the second is based on innovative modular multilevel converter ...
Adam, G.P.   +5 more
core  

Microwave integrated circuit for Josephson voltage standards [PDF]

open access: yes, 1980
A microwave integrated circuit comprised of one or more Josephson junctions and short sections of microstrip or stripline transmission line is fabricated from thin layers of superconducting metal on a dielectric substrate.
Chang, C. C., Holdeman, L. B., Toots, J.
core   +1 more source

Fault Location in High Voltage Transmission Lines Using Resistance, Reactance and Impedance

open access: yesJournal of Advanced Engineering and Computation, 2018
This paper presents two methods for on-line computation of dynamic fault location in HV transmission lines using three means; resistance, reactance and impedance. These methods can be used for dynamic distance protection of the transmission line.
Samira Seghir   +4 more
doaj   +1 more source

Voltage Multistability and Pulse Emergency Control for Distribution System with Power Flow Reversal [PDF]

open access: yes, 2015
High levels of penetration of distributed generation and aggressive reactive power compensation may result in the reversal of power flows in future distribution grids.
Nguyen, Hung D., Turitsyn, Konstantin
core   +2 more sources

ABOUT SOME FEATURES OF TRANSMISSION MODE FOR ACTIVE POWER OF ELECTRICAL LINE [PDF]

open access: yesProblems of the Regional Energetics, 2013
This paperwork examines the problem of maximum power transfer to the load of a long line mode change from idle line (XX ) to short-circuit ( SC). Load line changes from idle mode (IM ) to its short-circuit (SC ).
Paţiuc V.   +4 more
doaj  

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