Results 201 to 210 of about 1,030 (244)
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Systematic analysis of the harmonics in resonant grounding systems
2005 IEEE Russia Power Tech, 2005This paper deals with the causes, propagation and resonance phenomena of harmonics in the zero sequence currents and line-to-earth voltages of medium voltage (MV) networks with grounding via Peterson coils. Of special interest is the relation of these harmonics between normal and earth fault operation of the network.
Peter Schegner +2 more
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2018 IEEE Industry Applications Society Annual Meeting (IAS), 2018
The paper puts forward a recent practical issue which has never been addressed before that is associated with resonant grounded networks fed from multiple independent transformers and located in the same substation. This situation is common when the network is not initially designed as a resonant grounding network and the intention of using resonant ...
Ameen Gargoom +4 more
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The paper puts forward a recent practical issue which has never been addressed before that is associated with resonant grounded networks fed from multiple independent transformers and located in the same substation. This situation is common when the network is not initially designed as a resonant grounding network and the intention of using resonant ...
Ameen Gargoom +4 more
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Application of Resonant Grounding in Power Systems in the United States
Transactions of the American Institute of Electrical Engineers, 1951Previous investigations indicated a trend toward increased application of resonant grounding in the United States. The application of resonant grounding in power systems operating at voltages from 2.4 kv to 230 kv has been analyzed on the basis of answers to a questionnaire received from all organizations using such grounding.
Eric T. B. Gross, Edward W. Atherton
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A Ring Resonator System for Ground Subsurface Sensing
Subsurface Sensing Technologies and Applications, 2000A circular ring placed parallel above the ground surface is analyzed. The analysis, based on transmission-line modeling, shows how the structure can be utilized for ground conductivity sensing purposes. It is shown that, once the operating frequency is tuned to a half wavelength resonance, the information on the amplitude ratio of two voltages (or two ...
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Effects of grounding on distribution system harmonic resonance conditions
IEEE Transactions on Power Delivery, 1989An analytic model is presented which predicts the impact of soil resistivity, grounding, and electric load on power system resonance characteristics. A parametric study is reported which illustrates the significance of these parameters and provides a quantitative evaluation of their effects.
A.P.S. Meliopoulos +2 more
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Energy to peak control of LPV systems with application to rotorcraft ground resonance
Proceedings of the 2001 American Control Conference. (Cat. No.01CH37148), 2001Energy to peak control problem for linear parameter varying (LPV) systems involves the design of a stabilizing controller that guarantees satisfaction of time domain L/sub /spl infin// constraints for all bounded energy disturbances and admissible parameter trajectories.
Ravi K. Prasanth +3 more
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Ground and air resonance characteristics of a soft in-plane rigid-rotor system
VTOL Research, Design, and Operations Meeting, 1969A flight research program was conducted on a soft in‐plane matched‐stiffness rotor in which it was demonstrated that a soft in‐plane rigid rotor is subject to mechanical instability in flight as well as on the ground. The research included extending existing analysis techniques to include aerodynamic forces.
R. E. Donham +2 more
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Characteristic analysis of single-phase grounding fault in resonant grounded systems based-on HHT
2016 IEEE 11th Conference on Industrial Electronics and Applications (ICIEA), 2016Transient analysis is carried out for the single-phase grounding fault in small current grounding system, the transient grounding current expression is derived, and the influence factors are analyzed. Introduces a method for non-stationary and non-linear signal analysis method-Hilbert Huang transform (HHT) to analyze the single phase grounding fault in
Yingwei Xiao +3 more
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Grounding Failure Detection Based on Wavelets Method in Resonant Grounded Power Distribution System
2010 Second WRI Global Congress on Intelligent Systems, 2010This paper analyses characteristics of single-phase ground fault and presents a fault line selecting method based on wavelet transform. Base on Sampling frequency, it selects the special frequency band, the singularity detection with wavelet is employed to obtain the polarities and magnitudes of the abrupt of current, and through comparing the ...
Yusheng Zhou +4 more
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2012 International Conference on Lightning Protection (ICLP), 2012
A joint research project between AES Sul, the Federal University of Itajuba and the University of Bologna aims at defining the required protections against lightning-originated overvoltages in a resonant grounded distribution system in order to achieve the adequate lightning performance level with minimum cost.
BORGHETTI, ALBERTO +5 more
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A joint research project between AES Sul, the Federal University of Itajuba and the University of Bologna aims at defining the required protections against lightning-originated overvoltages in a resonant grounded distribution system in order to achieve the adequate lightning performance level with minimum cost.
BORGHETTI, ALBERTO +5 more
openaire +1 more source