Results 211 to 220 of about 18,045 (263)
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Transformer Tap Setting in Optimal Load Flow
IEEE Power Engineering Review, 1985A new method of transformer ratio control in optimal load flow is presented. The transformer taps and the phase shift angles can be controlled by a quite general criterion function. The method established is valid both for two-and three-winding transformers.
N. Flatabo, J.A. Foosnas, T.-o. Berntsen
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Use of Tap Water and Disinfection Practices in Outpatient Settings: A Survey of Otolaryngologists
Archives of Otolaryngology - Head and Neck Surgery, 1991A survey of otolaryngologists belonging to the American Academy of Otolaryngology-Head and Neck Surgery was conducted to estimate the frequency of tap water use during otologic examinations and to assess methods used for disinfection of otologic instruments in outpatient settings. Questionnaires were returned by 516 persons residing in 49 states.
P W, Lowry, W R, Jarvis
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Substation-oriented PMU placement considering transformer tap settings
2018 IEEE International Conference on High Voltage Engineering and Application (ICHVE), 2018The most crucial functions of modern power systems are monitoring and control. These tasks can be efficiently accomplished using synchronized phasor measurement units (PMUs) which are extremely accurate devices installed at substations providing measurements of the voltage phasor at the installation bus and the current phasors in the branches ...
Nikolaos M. Manousakis, George N. Korres
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Optimal tap settings for voltage regulation transformers in distribution networks
2013 North American Power Symposium (NAPS), 2013In this paper, we propose a method to optimally set the taps of voltage regulation transformers in distribution networks. Specifically, we cast the problem of optimally choosing the tap settings as a rank-constrained semidefinite program (SDP) with the transformer tap positions removed from the network's admittance matrix and replaced by additional ...
Brett A. Robbins +2 more
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Can Personal Goal Setting Tap the Potential of the Gifted Underachiever?
Roeper Review, 2010Although underachieving gifted students have been largely ignored in empirical research, there has been a modest surge of interest in describing and “treating” this population in recent years. It is estimated that nearly half of gifted youth achieve significantly below their potential.
Dominique Morisano, Bruce M. Shore
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Optimization of fixed tap transformer setting in bulk electric systems
IEEE Transactions on Power Systems, 1991A novel technique was developed to determine fixed tap transformer settings that are optimal for several load patterns representing, for example, winter peak, summer peak, and off-peak loading patterns. The solution algorithm is based on the Newton approach and employs a recently developed technique to identify binding inequality constraints. A special
W. Kellerman +3 more
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Refugees set to tap demand for virtual workforce
New Scientist, 2009Crowd-sourcing may help spread the benefits of the digital economy to previously excluded ...
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Optimising Low-Voltage Transformer Tap Settings in Distribution Networks
2019 29th Australasian Universities Power Engineering Conference (AUPEC), 2019In this paper, a practical method of determining the optimal tap setting of no-load distribution tap-changing transformers is proposed. The uptake of distributed energy resources impacts the risk of distribution systems violating voltage constraints.
Joshua Paoli +2 more
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On-load tap changer's dynamic resistance measurement: Settings and interpretation
2011 Electrical Insulation Conference (EIC)., 2011An on-load tap changer (OLTC) is prone to many different defects and degradation mechanisms due to its continuous operation under load condition. A high load current and high operation temperature accelerate the process of contact wear. Contacts erode due to the fact that under certain conditions the contacts develop a resistive layer due to hot ...
J. J. Erbrink +5 more
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Observability and estimation of transformer tap setting with minimal PMU placement
2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008One of the most important applications of phasor measurement units (PMUs) is power system state estimation. Some models have been proposed for including phasor measurements in the state estimation. But, all of these models have treated transformer tap settings (voltage transformer turns ratio and phase-shift transformer angle) as fixed parameters of ...
M. Shiroie, S. H. Hosseini
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