Results 261 to 270 of about 21,643 (304)

Asymmetrical fault analysis using the bus impedance matrix

Proceedings of the Institution of Electrical Engineers, 1978
The method of the busbar impedance matrix is applied to the solution of asymmetrical faults through the use of sequence impedances and Kron's constraint matrix. An algorithm is proposed to facilitate the routine solution of complex configurations including simultaneous and cross-country faults.
C.B. Gray, P.N.P. Singh
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An asymmetrical fault current calculation method of synchronverter

2019 IEEE Applied Power Electronics Conference and Exposition (APEC), 2019
Synchronverter is subjected to a large inrush current when a short-circuit fault occurs, which may cause serious damage to the inverter and utility grid. Therefore, it is very important to figure out the fault current characteristics of synchronverter, and it is helpful for the study of restraining the fault inrush current.
Lili He, Wen Huang, Zhikang Shuai, Z. John Shen   +3 more
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An Adaptive Fault Ride-Through Scheme for Grid-Forming Inverters Under Asymmetrical Grid Faults

IEEE Transactions on Industrial Electronics, 2022
202206 bchy ; Accepted Manuscript ; RGC ; Others ; Innovation and Technology Commission of the HKSAR Goverment ; Published ; Green (AAM)
Zilin Li, Ka Wing Chan, Jiefeng Hu, Siu Wing Or   +3 more
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Transient Characteristics of Synchronverters Subjected to Asymmetric Faults

IEEE Transactions on Power Delivery, 2019
Since the large fault inrush current threatens the safety of power electronic devices, the synchronverter should have the fault ride-through (FRT) capability and should be equipped with a reliable protection system. Therefore, it is important to study the transient fault characteristics of the synchronverter and propose its fault current estimation ...
Lili He, Zhikang Shuai, Xin Zhang, Xuan Liu, Zuyi Li, Z. John Shen   +5 more
openaire   +1 more source

Fault-tolerant scheduling for asymmetric communications

5th European Personal Mobile Communications Conference 2003, 2003
A fault-tolerant scheduling system is presented for data broadcasting in asymmetric communication environments for obtaining high communication efficiency for the clients of mobile computing. The coding method that plays a key role in implementing this system is analysed.
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Open transistor fault detection in asymmetric multilevel inverter

2015 IEEE International Conference on Signal Processing, Informatics, Communication and Energy Systems (SPICES), 2015
The number of power semiconductor switches and DC sources will increase with the increase in the number of levels of output voltage of the multilevel inverter. As the number of power semiconductor switches increases, the possibility of its failure and hence the breakdown of the inverter operation also escalate in a nonlinear manner.
Nithin Raj, Saly George, G Jagadanand
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Closed-Form Determination of the Impedance Locus Plot of Fault Current Limiters: Asymmetrical Faults

IEEE Transactions on Power Delivery, 2020
Closed-form determination of fault current limiter (FCL) impedance for symmetrical faults was reported previously using a mathematically rigorous method. In this paper, extensions of the method to asymmetrical faults are presented. Single line-to-ground faults and line-to-line faults are studied.
Shayan Behzadirafi, Francisco de Leon
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Masking asymmetric line faults using semi-distance codes

[1988] The Eighteenth International Symposium on Fault-Tolerant Computing. Digest of Papers, 2003
The 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, 1981
This 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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PM Synchronous Machine Drive Response to Asymmetrical Short-Circuit Faults

IEEE Transactions on Industry Applications, 2014
This 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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