High-Speed 3d Modelling from Premium Rebuilding of Solid State Models

The specific features relating to voltage control of power transformers at distribution network transformer substations are considered. An approach to implementing high-speed on-load voltage control of serially produced 10/0.4 kV power transformers by using a solid-state on-load tap changer (SOLTC) is presented. An example of the SOLTC circuit solution on the basis of thyristor switches is given. On-load voltage control algorithms for power transformers equipped with SOLTC that ensure high reliability and high-speed operation are proposed. The SOLTC performance and the operability of the suggested voltage control algorithms were studied by simulation in the Matlab/Simulink environment and by experiments on the SOLTC physical model. The structure and peculiarities of the used simulation Matlab model are described. The SOLTC physical model design and its parameters are presented. The results obtained from the simulating the SOLTC operation on the Matlab model and from the experiments on the SOLTS physical model jointly with a power transformer under different loads and with using different control algorithms are given. An analysis of the experimental study results has shown the soundness of the adopted technical solutions. It has been demonstrated that the use of an SOLTC ensures high-speed voltage control, high efficiency and reliability of its operation, and arcless switching of the power transformer regulating taps without load voltage and current interruption. By using the SOLTC operation algorithms it is possible to perform individual phase voltage regulation in a three-phase 0.4 kV distribution network. The possibility of integrating SOLTC control and diagnostic facilities into the structure of modern digital substations based on the digital interface according to the IEC 61850 standard is noted.

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Measurement of dipole-coupled lineshapes in a many-spin system by constant-time two-dimensional solid state NMR with high-speed magic-angle spinning

Chemical Physics ◽

10.1016/s0301-0104(01)00250-6 ◽

2001 ◽

Vol 266 (2-3) ◽

pp. 231-236 ◽

Cited By ~ 49

Author(s):

Yoshitaka Ishii ◽

John J. Balbach ◽

Robert Tycko

Keyword(s):

Solid State ◽

Spin System ◽

Solid State Nmr ◽

High Speed ◽

Magic Angle Spinning ◽

Constant Time ◽

Magic Angle ◽

Two Dimensional ◽

Angle Spinning

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Development of Solid-state Models for the Gears of Different Geometry

Procedia Engineering ◽

10.1016/j.proeng.2015.12.125 ◽

2015 ◽

Vol 129 ◽

pp. 369-373 ◽

Cited By ~ 4

Author(s):

V.V. Bruzhas ◽

B.A. Lopatin

Keyword(s):

Solid State ◽

State Models

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Research of a New All-Optical Solid-State Scanner Based on GaAs

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.710.269 ◽

2013 ◽

Vol 710 ◽

pp. 269-272

Author(s):

Guo Ya Xu ◽

Jun Hua He ◽

Fan Sen ◽

Yuan Tao Zhu

Keyword(s):

Solid State ◽

Optical Waveguide ◽

High Speed ◽

Refractive Index Change ◽

Core Layer ◽

Beam Deflection ◽

Optical Scanning ◽

Signal Light ◽

Change Effect ◽

All Optical

Design an all-optical solid-state scanner chip, which can realize high speed light deflection in a very small space, instead of electron beam deflection scan image converter tube and opto-mechanical scanner, cancel the complicated mechanical components, use the all-optical scanning to realize the super fast phenomenon observation. The beam deflection system is based on semiconductor optical waveguide core layer carrier induced refractive index change effect to realize, its development work is mainly divided into semiconductor optical waveguide and saw prisms two parts. And through the experiment, we measured deflection angle of the scanner chip to 1053nm signal light.

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Thermodynamics of the Atomic Distribution in Pt3Pd2, Pt2Pd3 and their Corresponding (111) Surfaces

South African Journal of Chemistry ◽

10.17159/0379-4350/2021/v74a7 ◽

2021 ◽

Vol 74 ◽

Author(s):

Kyle Meerholz ◽

David Santos-Carballal ◽

Umberto Terranova ◽

Anzel Falch ◽

Cornelia G.C.E. van Sittert ◽

...

Keyword(s):

Solid State ◽

Bimetallic Catalysts ◽

Computational Study ◽

Interatomic Potentials ◽

Site Occupation ◽

Surface Energies ◽

General Utility ◽

Production Of Hydrogen ◽

Surface Models ◽

State Models

ABSTRACT In this study, we have developed solid-state models of platinum and palladium bimetallic catalysts, Pt3Pd2 and Pt2Pd3, which are rapidly thermally annealed at 800 °C. These models were constructed by determining all the unique atomic configurations in a 2x2x1 supercell, using the program Site-Occupation Disorder (SOD), and optimized with the General Utility Lattice Program (GULP) using Sutton-Chen interatomic potentials. Each catalyst had 101 unique bulk models that were developed into surface models, which were constructed using the two-region surface technique before the surface energies were determined. The planes and compositions with lowest surface energies were chosen as the representative models for the surface structure of the bimetallic catalysts. These representative models will now be used in a computational study of the HyS process for the production of hydrogen. Keywords: HyS process, platinum, palladium, solid-state, catalyst, Site-Occupation Disorder.

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