Results 31 to 40 of about 264,326 (272)
Line selection method with transient state based on intrinsic mode energy
Gong-kuang zidonghua, 2013 In view of problem that fault line selection method based on wavelet analysis of coal mine power grid ca't guarantee the optimal decomposition effect due to the decomposition effect depends on choice of primary function, the paper presented a fault line ...
WANG Qing-liang +4 more
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IEEE Access, 2020 Fault detection in resonant grounding (RG) distribution networks remains a challenge due to weak fault signals, extremely complex fault conditions, and unstable intermittent arc grounding faults.
Zhinong Wei +4 more
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Research on fault line selection method of mine power network
Gong-kuang zidonghua, 2018 In view of characteristics of DC component of transient zero-sequence current in fault lines is larger than that of normal lines when additional DC source system of mine power network occurrs single-phase earth fault, a fault line selection method of ...
LI Ke +5 more
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Energies, 2019 The identification of faulty feeder for single-phase high impedance faults (HIFs), especially in resonant grounding distribution system (RGDS), has always been a challenge, and existing faulty feeder identification techniques for HIFs suffer from some ...
Tao Tang +3 more
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МULTIFREQUENCY PROTECTING METHOD AGAINST EARTH-FAULTS OF PHASE IN THE COMPENSATED ELECTRIC NETWORKS
Electrical engineering & Electromechanics, 2020 Introduction. A significant proportion of earth faults in 6 - 35 kV networks is a transient and short-lived process, which is followed by an electric arc. Problem. In such cases, earth-fault protection that responds to steady-state current and voltage is
V. F. Syvokobylenko, V. A. Lysenko
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International Journal of Electrical Power & Energy SystemsAfter the single-phase high impedance fault (HIF) occurs in distribution networks, it is difficult to select the faulted feeder and locate the fault section due to the weak fault current and susceptibility to noise interference.
Ao Li +4 more
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Resonance mechanisms of a single line-to-ground fault on ungrounded systems
Archives of Electrical Engineering, 2020 As for a single line-to-ground fault in an ungrounded distribution system, the power-frequency current is too low to detect the fault. The transient current is more palpable than that at a power-frequency of 50 or 60 Hz.
Jun Jinag, Ling Liu
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IET Generation, Transmission & Distribution, 2023 In the case of a single‐phase grounding fault in the distribution network, the transient zero‐sequence current (TZSC) tends to be non‐linear and non‐stationary. The faulty line selection is relatively difficult.
Wei Guo, Yuntao Shi
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Non-stationary Magnetic Microstructures in Stellar Thin Accretion Discs
, 2013 We examine the morphology of magnetic structures in thin plasma accretion discs, generalizing a stationary ideal MHD model to the time-dependent visco-resistive case.
Montani, Giovanni, Petitta, Jacopo
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Vectorial formalism for analysis and design of polyphase synchronous machines [PDF]
, 2003 A vectorial formalism for analysis and design of polyphase synchronous machines without reluctance and saturation effects is described. We prove the equivalence of such a machine with a set of magnetically independent machines, which are electrically and
BOUSCAYROL, Alain +2 more
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