Results 311 to 320 of about 10,421,732 (397)

A Current Limiting Strategy With Parallel Virtual Impedance for Three-Phase Three-Leg Inverter Under Asymmetrical Short-Circuit Fault to Improve the Controllable Capability of Fault Currents

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, Z. Liang, Yun Zheng, Yibin Lin, Yong Kang   +4 more
semanticscholar   +1 more source

Machine Learning-Based Fault Diagnosis for Single- and Multi-Faults in Induction Motors Using Measured Stator Currents and Vibration Signals

IEEE transactions on industry applications, 2019
In this paper, a practical machine learning-based fault diagnosis method is proposed for induction motors using experimental data. Various single- and multi-electrical and/or mechanical faults are applied to two identical induction motors in lab ...
M. Z. Ali, Md. Nasmus Sakib Khan Shabbir, Xiaodong Liang, Yu Zhang, Tingbiao Hu   +4 more
semanticscholar   +1 more source

A Novel Fault Diagnosis Scheme Based on Local Fault Currents for DC Microgrids

IEEE Transactions on Power Delivery
The diversity of line fault types, the uncertainty of fault resistances, the limitation of available fault information, and the similarity of positive pole currents under different work conditions challenge the fault diagnosis of DC microgrids.
Weiwei Li, Hua Han, Yao Sun, Shimiao Chen, Hongyi Liu, Xinlong Zheng, Yonglu Liu, Jin Zhao   +7 more
semanticscholar   +1 more source

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.
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
openaire   +1 more source

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, Tao Ma, Yuanhe Li, Xi Xu   +6 more
openaire   +1 more source

Superconducting fault current limiters

IEE Colloquium on High Tc Superconducting Materials as `Magnets', 1995
Fault current limiters (FCLs), superconducting or otherwise, have the potential to reduce fault levels on electricity power networks, and may ultimately lead to lower rated components (i.e. cheaper) being used, or to increased capacity on existing systems.
openaire   +2 more sources

Superconducting fault current limiters

IEEE Power Engineering Review, 2000
Events in the power utility industry, such as deregulation, demands for better power quality and reliability, the advent of high temperature superconductivity, and the push to use technology to realize greater profits, have renewed interest in fault current limiters (FCL).
openaire   +1 more source

Fault-resistance effect on ground fault current

Electrical Engineering, 1953
GROUND FAULT currents may be reduced substantially when fault resistance is included in the fault circuit. The majority of faults that occur on a power system involve ground and occur between conductor and tower. When a fault occurs to a steel tower or grounded wood pole on a grounded system the footing resistance is included automatically in the fault
openaire   +1 more source

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