Results 251 to 260 of about 173,457,374 (299)
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State estimation of voltage and phase-shift transformer tap settings
IEEE Transactions on Power Systems, 1992A transformer tap estimation technique is presented that overcomes earlier limitations because of a direct algorithmic approach. The procedure provides for turn ratio and phase angle measurements, and treats each transformer tap setting as an independent state variable.
P.A. Teixeira +4 more
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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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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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Carrier and Clock Recovery from Transversal Equalizer Tap Settings for a Partial Response System
IEEE Transactions on Communications, 1975A general expression is derived for the tap settings of a linear transversal equalizer using the minimum mean-square error (MMSE) criterion when the class-4 partial-response (PR) signal is distorted by noise as well as carrier phase and timing errors. The values of the tap settings are used to reduce the carrier and timing phase errors.
J. Steel, B. M. Smith
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Optimal Tap Setting of Voltage Regulation Transformers in Unbalanced Distribution Systems
IEEE Transactions on Power Systems, 2016In this paper, we propose a method to optimally set the tap position of voltage regulation transformers in distribution systems. We cast the problem as a rank-constrained semidefinite program (SDP), in which the transformer tap ratios are captured by 1) introducing a secondary-side “virtual” bus per transformer, and 2) constraining the values that ...
Brett A. Robbins +2 more
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Variable voltage set point control of tap changers in distribution grids
IEEE PES Innovative Smart Grid Technologies, Europe, 2014This paper discusses changing requirements for tap changer controllers in distribution grids with high penetration of renewable generation. Furthermore, a new tap changer controller approach based on a power flow dependent voltage set point curve using hysteresis is introduced.
E.-M. Baerthlein +2 more
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Optimization of tap settings and capacitor units with expert system on distribution system
Proceedings of TENCON '93. IEEE Region 10 International Conference on Computers, Communications and Automation, 2002An expert system method for discrete VAr optimization on distribution system is presented in this paper. The expert system can aid the planning engineers to make an initial feasible solution, and to decide the position of transformer tap settings and the number of capacitor units.
null Mingtian Fan +2 more
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