Results 211 to 220 of about 55,562 (265)

Rectifier Fault Currents

Transactions of the American Institute of Electrical Engineers, 1945
CURRENTS in excess of normal, or fault currents, flow in rectifier circuits under conditions of arc-back or d-c short circuit. In normal service, faults are imposed on rectifiers by both the arc-backs that occur in the rectifier itself and the short circuits that occur in the external d-c system.
C. C. Herskind, H. L. Kellogg
openaire   +2 more sources

Multicell Fault Current Limiter

IEEE Transactions on Industrial Electronics, 2014
A multicell fault current limiter (MCFCL) is proposed in this paper. The MCFCL is composed of multiple fault current limiting cells. Each fault current limiting cell consists of a fault current limiting inductor and a power electronic module. The proposed MCFCL has the flexibility in expanding the operation voltage by increasing the number of fault ...
Wenyong Guo, Liye Xiao, Shaotao Dai, Zhifeng Zhang, T. Ma, Yuanhe Li, Xi Xu   +6 more
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Nonsuperconducting Fault Current Limiter With Controlling the Magnitudes of Fault Currents

IEEE Transactions on Power Electronics, 2009
In this paper, a diode-bridge-type nonsuperconductor fault current limiter (NSFCL) is proposed. The structure has the capability of controlling the DC reactor current that yields to control the magnitude of fault current. In order to control the magnitude of DC reactor current, a discharging resistor is used in the proposed structure.
M.T. Hagh, M. Abapour
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Rectifier Fault Currents---II

Transactions of the American Institute of Electrical Engineers, 1949
A comprehensive procedure for the analysis of fault currents in power rectifiers has been developed and some of the more usual cases have been analyzed for the 6-phase double-Y circuit. However, further analyses are still required to cover all the conditions which may be encountered in practice and provide a ready means for determining fault currents.
C. C. Herskind, A. Schmidt, C. E. Rettig
openaire   +1 more source

A novel solution for fault current suppression in transmission systems based on fault current splitters

Electric Power Systems Research, 2021
Abstract To mitigate the threat from increasing fault current level in high-voltage transmission systems, a “dredging theory” based on the fault current splitter (FCS) was proposed to help the over-duty circuit breaker clear the fault. However, detailed practice of this theory is not fully studied.
Dawei Chen, Canbing Li, Zhenci Xu, Kai Sun, Bin Zhou, Da Xu, Long Zhou   +6 more
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Fault-Current Measuring Device

Transactions of the American Institute of Electrical Engineers, 1946
IN electric power system operation numerous problems are encountered in analyzing the results of short circuits and in the physical location of the trouble. Some devices now available for analyzing short circuits in a-c circuits are the oscillograph, the annunciator ammeter, and a magnetic link device requiring rectifiers.
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Fault Location with Current Monitoring

1991, Proceedings. International Test Conference, 2005
Recently there has been renewed interest in fault detection in static CMOS circuits through current monitoring (“Iddq testing”). It is shown that accurate defect (diagnosis miay be performed with a combination of current and voltage observations. The proposed system combines a simple single fault model for test generation with a more realistic multiple
openaire   +1 more source

IGBT Fault Current Limiting Circuit

IEEE Industry Applications Magazine, 1995
Circuits are proposed which, by limiting the fault current magnitude, extends the short-circuit withstand time of high-efficiency (high-gain) IGBTs (insulated-gate bipolar transistors). Limiting of the fault current magnitude also results in reduced turn-off voltage transients, a desirable byproduct, especially for higher current modules. Moreover, the
R. Chokhawala, G. Castino
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Analysis of Current for Fault- Tolerant Control of Excitation Fault in DSEG

IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society, 2018
Doubly salient electromagnetic generator (DSEG)is a new type of high reliability DC generator. This paper gives a brief introduction to the fault-tolerant control strategy for the excitation fault of DSEG, once the fault of excitation part occurs, the energy storage capacitor on the load side acts as excitation power and directly provides excitation ...
Tengxiang Wen, Bo Zhou 0014, Xingwei Zhou, Yiqi Zhu   +3 more
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Fault current contribution of DFIG under unsymmetrical fault

2011 4th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies (DRPT), 2011
In this paper, the transient characteristics of double-fed induction generator (DFIG) are analyzed. Based on this, the fault current contribution of DFIG with and without crowbar are compared. Comparison result shows that fault current of DFIG under different ride-through conditions differs widely from each other.
Zheng-rong Wu, Gang Wang, Hai-feng Li, Tong-le Ding, Xiang Gao   +4 more
openaire   +1 more source