Results 21 to 30 of about 916,905 (189)

Stochastic resonance in electrical circuits—II: Nonconventional stochastic resonance. [PDF]

, 1999
Stochastic resonance (SR), in which a periodic signal in a nonlinear system can be amplified by added noise, is discussed. The application of circuit modeling techniques to the conventional form of SR, which occurs in static bistable potentials, was ...
Luchinsky, D. G., Mannella, R., McClintock, Peter V. E., Stocks, N. G.   +3 more
core   +5 more sources

The correction of instrument transformer ferroresonance model in IEC standard and study on resonance interval based on transformer damping

AIP Advances, 2023
The traditional ferromagnetic resonance model of the inductive voltage transformer in the IEC/TR 61869-102 transformer standard ignores the DC resistance of the transformer.
Hongwen Liu, Chenchao Chai, Chunli Zhang, Jindong Yang   +3 more
doaj   +1 more source

Ferromagnetic resonance over-voltage identification method based on Gram angle field

Energy Reports, 2022
In neutral point non-grounding systems with 35 kV and below, ferromagnetic resonance over-voltage faults often occurs, which brings safety hazards to power systems.
Qiong Li, Yang Zou, Guo Hua Long, Wenbao Wu   +3 more
doaj   +1 more source

Investigation of Resonance and Ferroresonance Overvoltages due to Cable-Transformer Interactions [PDF]

ERJ. Engineering Research Journal, 2020
In this paper, the resonance and ferroresonance phenomena are deeply investigated considering two different cable-transformer power systems. The internal transformer resonance overvoltage case is initiated due to a single-phase earth fault, while the studied ferroresonance case is due to a single-phase switching in the source feeding an unloaded ...
Alyaa Nassar, Abdel-Maksoud Taalab, Mohamed Izzularab, Nagy Elkalashy   +3 more
openaire   +1 more source

Cardiovascular magnetic resonance activity in the United Kingdom: a survey on behalf of the british society of cardiovascular magnetic resonance [PDF]

, 2011
<p>Background: The indications, complexity and capabilities of cardiovascular magnetic resonance (CMR) have rapidly expanded. Whether actual service provision and training have developed in parallel is unknown.</p> <p>Methods: We ...
J. Moon (6723125), Pennell, D.J., S. Neubauer (1410220), Payne, J., Neubauer, Stefan, J. Payne (2409088), Antony Renjith, Dargie, HJ, G. P. McCann (7591697), Antony, R, Hawkins, N.M., Payne John, C. Berry (7606274), Dargie, H.J., Renjith Antony, Nathaniel M Hawkins, Henry J Dargie, James Moon, Petrie Mark C, S. Daghem (7606259), Gerry P. McCann (7241615), Moon, J., Daghem, M., Pennell, DJ, Pennell Dudley J, Mark C Petrie, H. J. Dargie (7606265), Neubauer Stefan, Marwa Daghem, Antony, R., Gerry P McCann, R. Antony (7606253), McCann, GP, M. Daghem (7606256), Petrie, M.C., Moon James, Hawkins, NM, Safa Daghem, Daghem Marwa, Berry Colin, Colin Berry, D. J. Pennell (7606268), Dargie Henry J, McCann, G.P., Daghem, S, Payne, J, Neubauer, S., Hawkins Nathaniel M, Daghem, M, Daghem, S., Petrie, MC, McCann Gerry P, N. M. Hawkins (7606271), Moon, J, Dudley J Pennell, Berry, C, Berry, C., Neubauer, S, John Payne, M. C. Petrie (7606262), Daghem Safa, Stefan Neubauer   +61 more
core   +1 more source

Analyzing Ferroresonance Phenomena in Power Transformers Including Zinc Oxide Arrester and Neutral Resistance Effect

Applied Computational Intelligence and Soft Computing, 2012
This paper studies the effect of zinc oxide arrester (ZnO) and neutral earth resistance on controlling nonconventional oscillations of the unloaded power transformer. At first, ferroresonance overvoltage in the power system including ZnO is investigated.
Hamid Radmanesh, Fathi Seyed Hamid
doaj   +1 more source

Sensorless Control of Voltage Peaks in Class-E Single-Ended Resonant Inverter for Induction Heating Rice Cooker

Energies, 2021
Single-ended (SE) resonant inverters are widely used as power converters for high-pressure rice cooker induction, with 1200 V insulated-gate bipolar transistors (IGBTs) being used as switching devices for kW-class products.
Yongseung Oh, Jaeeul Yeon, Jayoon Kang, Ilya Galkin, Wonsoek Oh, Kyumin Cho   +5 more
doaj   +1 more source

Voltage Characteristic Analysis of Ultra-high Voltage Half-wavelength Transmission System Based on Wave Process Method

Journal of Modern Power Systems and Clean Energy, 2020
The voltage characteristics of a half-wavelength transmission (HWLT) system lack mechanism explanation and systematic summary. In this paper, both the steady-state and fault voltage characteristics are analyzed and explained based on the wave process ...
Hao Tian, Yutian Liu, Dong Yang, Xiaohui Qin, Yantao Zhang   +4 more
doaj   +1 more source

A Study on the Harmonic Resonance during Energizing Primary Restorative Transmission Systems: Korean Power System Case

Energies, 2022
In this paper, a power system restoration study following a massive or complete blackout was performed. The power system restoration process from a complete shutdown system without the operating generation and load starts with energizing primary ...
Minhan Yoon, Wonkeun Yu, Junghyun Oh, Heungjae Lee   +3 more
doaj   +1 more source

Mechanism of Quasi‐Power‐Frequency Resonant Overvoltage Triggered by Multiple Lightning Strikes in High‐Voltage Alternating Current Systems Equipped With Shunt Reactor

High Voltage, EarlyView.
ABSTRACT This paper investigates the generation mechanism of quasi‐power‐frequency resonant overvoltage triggered by multiple lightning strikes in high‐voltage alternating current (HVAC) systems equipped with shunt reactors. Based on field measurements from a 500 kV AC system, equivalent and simplified circuit models have been established to analyse ...
Tao Liang, Tao Cui, Zhengxi Wang, Tongwei Guo, Xiaohui Wu, Hong Zeng, Jie Guo, Yanzhao Xie   +7 more
wiley   +1 more source