Results 291 to 300 of about 1,482,813 (348)
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Masking asymmetric line faults using semi-distance codes
[1988] The Eighteenth International Symposium on Fault-Tolerant Computing. Digest of Papers, 2003The authors propose a masking method for asymmetric line faults in LSIs using semidistance codes, which are a class of nonlinear codes. Faults caused by open or short circuit defects in line areas of LSIs can be made asymmetric by controlling the bus driver and the bus terminal gates. The conditions required for codes to mask these faults are clarified,
Kazumitsu MATSUZAWA, Eiji FUJIWARA
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Accurate Calculation of Asymmetrical Fault Currents in Complex Power Systems
IEEE Power Engineering Review, 1981This paper describes an efficient method for accurate calculation of system asymmetrical short circuit currents for both balanced and unbalanced faults. The method uses a Fourier transform technique to calculate the unidirectional component of the short circuit current and a transient stability program to compute the alternating component. The proposed
A.S. Morched, G.A. Tench, P. Kundur
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IEEE transactions on power electronics, 2019
Voltage-controlled three-phase three-leg inverters are widely applied in various occasions. The inverters are generally switched to the current-controlled mode to limit the fault currents when short-circuit faults happen.
Xinchun Lin +4 more
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Voltage-controlled three-phase three-leg inverters are widely applied in various occasions. The inverters are generally switched to the current-controlled mode to limit the fault currents when short-circuit faults happen.
Xinchun Lin +4 more
semanticscholar +1 more source
PM Synchronous Machine Drive Response to Asymmetrical Short-Circuit Faults
IEEE Transactions on Industry Applications, 2014This paper investigates the impact of machine topology and parameters on the fault-mode characteristics of permanent-magnet synchronous machines (PMSMs) exposed to asymmetrical short-circuit (ASC) faults, one of the most dangerous faults in terms of peak current amplitudes and demagnetization risks.
Gilsu Choi, T. M. Jahns
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IEEE Journal of Emerging and Selected Topics in Power Electronics, 2019
Three-phase four-wire converter can eliminate power oscillation by introducing the zero sequence current, but the output unbalanced currents are likely to cause overcurrent problem under asymmetrical grid fault.
Zhikang Shuai, Min Xiao, Jun Ge, Z. Shen
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Three-phase four-wire converter can eliminate power oscillation by introducing the zero sequence current, but the output unbalanced currents are likely to cause overcurrent problem under asymmetrical grid fault.
Zhikang Shuai, Min Xiao, Jun Ge, Z. Shen
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A fault diagnosis algorithm for asymmetric modular architectures
IEEE Transactions on Computers, 1981Summary: This paper is devoted to the analysis of an algorithm for the automatic fault diagnosis of asymmetric modular networks. The network model used is the one proposed by [\textit{F. P. Preparata} et al., IEEE Trans. Electron. Comput. 16, 848--854 (1967; Zbl 0189.16904)], the faults are assumed to be solid, and the Hakimi-Amin t-diagnosability ...
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IEEE Transactions on Sustainable Energy, 2018
High-gain PID controllers with fast response are the most common schemes that are used to control polymer electrolyte membrane fuel cells (PEMFCs).
Aslan Mojallal, S. Lotfifard
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High-gain PID controllers with fast response are the most common schemes that are used to control polymer electrolyte membrane fuel cells (PEMFCs).
Aslan Mojallal, S. Lotfifard
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A fast simulation model of PMSG with asymmetric control during an asymmetric grid fault
2016 China International Conference on Electricity Distribution (CICED), 2016This paper presents a fast simulation method of PMSG, which adopts positive and negative sequence current separate control strategy during an asymmetric grid fault. Based on analysis of fault characteristics, the asymmetric control strategy is developed in PSCAD, aiming to alleviate the adverse effects on converter and grid during an asymmetric grid ...
Guobing Song +4 more
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Development of asymmetric basins along continental transform faults
Tectonophysics, 1992Abstract Many basins associated with wrench or transform faults are asymmetrical, both longitudinally and laterally; the sense of basin asymmetry changes along the strike of transform faults. Geophysical data from the Dead Sea rift and other transforms indicate that wrench-induced asymmetric basins are bounded on only one side by a transform fault ...
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A New Digital Relay for Generator Protection against Asymmetrical Faults
IEEE Power Engineering Review, 2001Under unbalanced conditions the three phase instantaneous power oscillates at twice the power system frequency. The magnitude of these oscillations can be used as a measure of the system unbalance. This article has introduced a new digital relaying algorithm designed to detect asymmetrical faults by monitoring the sinusoidal oscillations of the three ...
O. Usta, M. Bayrak, M.A. Redfern
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