Results 221 to 230 of about 18,045 (263)

State estimation of voltage and phase-shift transformer tap settings

IEEE Transactions on Power Systems, 1992
A 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, S.R. Brammer, W.L. Rutz, W.C. Merritt, J.L. Salmonsen   +4 more
openaire   +1 more source

Carrier and Clock Recovery from Transversal Equalizer Tap Settings for a Partial Response System

IEEE Transactions on Communications, 1975
A 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
openaire   +1 more source

Optimal Tap Setting of Voltage Regulation Transformers in Unbalanced Distribution Systems

IEEE Transactions on Power Systems, 2016
In 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, Hao Zhu, Alejandro D. Dominguez-Garcia   +2 more
openaire   +1 more source

Variable voltage set point control of tap changers in distribution grids

IEEE PES Innovative Smart Grid Technologies, Europe, 2014
This 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, M. Hartung, A. Panosyan   +2 more
openaire   +1 more source

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, 2002
An 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, null Zuping Zhang, C.E. Lin   +2 more
openaire   +1 more source

The effect of set point ratio and surface Young’s modulus on maximum tapping forces in fluid tapping mode atomic force microscopy

Journal of Applied Physics, 2010
There is great interest in using proximal probe techniques to simultaneously image and measure physical properties of surfaces with nanoscale spatial resolution. In this regard, there have been recent innovations in generating time-resolved force interaction between the tip and surface during regular operation of tapping mode atomic force microscopy ...
Bharath Kumar, Phillip M. Pifer, Anthony Giovengo, Justin Legleiter   +3 more
openaire   +1 more source

Is tap water a safe alternative to normal saline for wound irrigation in the community setting?

Journal of Wound Care, 2001
Objective: This double-blind randomised controlled trial compared the effects of tap water and normal saline on the healing and infection rates of acute and chronic wounds. Method: The trial was conducted in two metropolitan community health centres in New South Wales, Australia.
R D, Griffiths, R S, Fernandez, C A, Ussia   +2 more
openaire   +2 more sources

Multiple tap sets to improve Venturi flowmeters performance characteristics with disturbed flow

AWWA Water Science, 2019
Venturi flowmeters are commonly used to accurately measure fluid flows in piped systems. The performance of a Venturi flowmeter can be affected when the flowmeter is installed in close proximity to a flow disturbance such as a valve, elbow, or pipe fitting.
Taylor B. Stauffer, Michael C. Johnson, Zachary B. Sharp, Steven L. Barfuss   +3 more
openaire   +1 more source

Transformer Tap Setting and System Voltage Raise Impact on Optimum Planning of Static Capcitors

IEEE Transactions on Power Apparatus and Systems, 1984
Capacitor planning is based on network voltage maintenance under the normal and abnormal power system operation. The security against contingencies, the transformer tao setting and system voltage steady state operating limits together with other variables feasible range define the problem boundaries.
openaire   +1 more source

Method and Software Tool for Assessment of Seasonal Step-Up Transformer Optimal Tap Settings

2020
In most European countries the generators’ step-up transformers are demanded to be equipped with tap changers, explicitly or through tanϕ.-voltage requirement. Releasing the maximum available reactive power range of generator or at different voltage levels at the point of common coupling is the prime purpose of required transformers variable turns ...
Dragosavac, Jasna, Janda, Žarko, Georgijević, Nikola, Dobričić, Savo, Ćirić, Zoran, Subotić, S., Mlađenović, M., Đorđević, M.   +7 more
openaire   +2 more sources