Results 21 to 30 of about 2,978,543 (343)
The Journal of Engineering, 2019 This paper considers the distributed capacitance of transmission lines to research the protection of high-voltage direct-current (HVDC) transmission line.
Yunke Zhang +5 more
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DC fault isolation study of bidirectional dual active bridge DC/DC converter for DC transmission grid application [PDF]
, 2015 Fast isolation and detection of DC faults is currently a limiting factor in high power DC transmission grid development. Recent research has shown that the role of DC/DC converters is becoming increasingly important in solving various DC grid challenges ...
Aboushady, Ahmed A. +2 more
core +2 more sources
Novel protection method for VSC-HVDC transmission lines
The Journal of Engineering, 2019 The large shunt capacitances on both sides of VSC-HVDC transmission line will block and reflect the travelling waves when a fault occurs on DC cable lines.
Lingtong Jiang +5 more
doaj +1 more source
A critical review of PV systems’ faults with the relevant detection methods
Energy Nexus, 2023 PhotoVoltaic (PV) systems are often subjected to operational faults which negatively affect their performance. Corresponding to different types and natures, such faults prevent the PV systems from achieving their nominal power output and attaining the ...
Khaled Osmani +5 more
doaj +1 more source
Application of short-time Fourier transform for harmonic-based protection of meshed VSC-MTDC grids
The Journal of Engineering, 2019 This work studies the application of short-time Fourier transform (STFT) to extract current harmonics of various fault types to design a protection method for meshed multi-terminal voltage source converter-high-voltage direct current (VSC-HVDC-MTDC ...
Mani Ashouri +3 more
doaj +1 more source
Testing Embedded Memories in Telecommunication Systems [PDF]
, 1999 Extensive system testing is mandatory nowadays to achieve high product quality. Telecommunication systems are particularly sensitive to such a requirement; to maintain market competitiveness, manufacturers need to combine reduced costs, shorter life ...
Barbagallo, S. +4 more
core +1 more source
Ultra-Fast Busbar Protection by Applying TT-transform on Superimposed Current Signals [PDF]
مجله مدل سازی در مهندسی, 2018 In this paper a new method for busbar protection is presented. In this method high frequency components generated by faults in current signals at the outputs of current transformers of substations are extracted by applying TT transform and then the ...
Mahmood Lashgari, S. Mohammad Shahrtash
doaj +1 more source
The Journal of Engineering, 2019 The hybrid high-voltage direct current (HVDC) transmission system comprising a line-commutated converter (LCC) on the rectifier side and a voltage source converter (VSC) on the inverter side combines the advantages of both LCC and VSC.
Yanting Wang, Baohui Zhang, Baohui Zhang
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IET Generation, Transmission & Distribution, 2023 This paper presents a novel protection method for transmission lines that estimates the superimposed component phasor using phaselet transform. The phaselet transform computes the phasors over variable‐lenfgth data window at the instant of a fault, so it
Sajad Ansari, Navid Ghaffarzadeh
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Dynamics of mesoscopic precipitate lattices in phase separating alloys under external load [PDF]
, 2000 We investigate, via three-dimensional atomistic computer simulations, phase separation in an alloy under external load. A regular two-dimensional array of cylindrical precipitates, forming a mesoscopic precipitate lattice, evolves in the case of applied ...
Binder K. +12 more
core +1 more source