Results 231 to 240 of about 21,938 (263)
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First resonant neutral grounding implantation in Spanish distribution system
2001 IEEE Porto Power Tech Proceedings (Cat. No.01EX502), 2002Changing the earthing system of medium voltage networks is a complex operation. It is necessary to take into account all the various technical aspects of the totality of the equipment involved in this process. Frequently, considerable additional economic investment is required as a result of this analysis of technical aspects.
A.J. Mazon +5 more
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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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Multiband non-resonant antenna system with reduced ground clearance
2017 11th European Conference on Antennas and Propagation (EUCAP), 2017Small and multiband antennas are crucial elements for wireless devices. On one hand, the space devoted to the antenna is small due to the presence of other electronic components in the device. On the other hand, the number of frequency bands with the inclusion of 4G is relevant.
Andujar, Aurora +2 more
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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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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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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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Microwave resonance effects in paramagnetic singlet-ground-state systems
AIP Conference Proceedings, 1975EPR in the excited Γ5(2) triplet state of Tm3+ in cubic TmP has been studied. From the temperature dependence of the g‐value, it was found that the fourth‐order term dominates in the crystal‐field, and the exchange interaction between Tm3+ ions is weakly antiferromagnetic.
K. Sugawara, C. Y. Huang, B. R. Copper
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IEEE Transactions on Power Delivery, 2021
This paper proposes a new method to select single-line-to-ground (SLG) fault feeder in resonant grounding power distribution system based on compensation characteristic of extinction coil in different frequencies. The proposed method is insusceptible to the influence of device polarity reverse installation.
Penghui Liu +5 more
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This paper proposes a new method to select single-line-to-ground (SLG) fault feeder in resonant grounding power distribution system based on compensation characteristic of extinction coil in different frequencies. The proposed method is insusceptible to the influence of device polarity reverse installation.
Penghui Liu +5 more
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Power system resonance excited by VFD ground fault
2009 IEEE International Electric Machines and Drives Conference, 2009This paper investigates the resonance phenomenon produced by a voltage source PWM variable frequency drive (VFD) on an ungrounded delta system. Many drives are installed on ungrounded delta systems without isolation transformers or other means to provide inverter ground reference.
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Resonance Analysis of Small Current Grounding System in Distribution Network
2018 China International Conference on Electricity Distribution (CICED), 2018At present, there are a large number of arc suppression coil grounding mode in the low-voltage distribution network for the equipment insulation and power supply reliability considerations. The role of arc suppression coil grounding mode is when the grid single-phase ground fault occurs, arc suppression coil will provide inductor current to compensate ...
Zhou Desheng +5 more
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