Traction Substation Transformer Power Distribution Investigation Under Asymmetric and Nonlinear Loading Conditions

Author(s):  
Maksim Bezzub ◽  
Olexii Bialobrzheskyi ◽  
Oleh Todorov ◽  
Ihor Reva
Author(s):  
Mehmet Salih Taci ◽  
N. Tayebi

This paper presents determining the actual values of the effective resistance and reactance components of a single phase auto-transformers, the measured values of voltages and currents were used for the calculation of R and X components for fundamental frequency of the system. The obtained values are simulated in the PSpice environment and then how the currents, voltages and power are distributed between them is explained based on calculations.


2011 ◽  
Vol 82 (8) ◽  
pp. 441-444 ◽  
Author(s):  
V. V. Andreev ◽  
V. A. Grechishnikov ◽  
N. N. Privezentsev ◽  
M. V. Shevlyugin

Author(s):  
Valery Varentsov ◽  
Boris Sorin

Objective: To improve the methods of calculation of series compensation devices (UPK), taking into account the make-away of bunch of the trains. Methods: To determine maximum losses of voltage and currents in catenary circuit the methods of probability theory and mathematic statistics were used. Results: The paper provides the technology for UPK calculation, that allows to determine the UPK capacity for between-substation zones, considering real-life traffic schedule and allowable voltage at train collectors. Practical importance: Alteration of technologies for UPK capacity calculations, in part of input data, that include traction substation transformer power, may significantly decreases the traction load power. This will allow to lower capital input for UPK installation and to decrease operational costs for UPK maintenance.


Author(s):  
L.H. Bolz ◽  
D.H. Reneker

The attack, on the surface of a polymer, by the atomic, molecular and ionic species that are created in a low pressure electrical discharge in a gas is interesting because: 1) significant interior morphological features may be revealed, 2) dielectric breakdown of polymeric insulation on high voltage power distribution lines involves the attack on the polymer of such species created in a corona discharge, 3) adhesive bonds formed between polymer surfaces subjected to such SDecies are much stronger than bonds between untreated surfaces, 4) the chemical modification of the surface creates a reactive surface to which a thin layer of another polymer may be bonded by glow discharge polymerization.


2020 ◽  
pp. 28-33
Author(s):  
A. Yu. Dunaev ◽  
A. S. Baturin ◽  
V. N. Krutikov ◽  
S. P. Morozova

An improved monochromatic radiant source with spectral bandwidth of 4 nm based on supercontinuum laser and a double monochromator was included in absolute cryogenic radiometer-based facility to improve the accuracy of spectral responsivity measurement in the range 0.9–1.6 μm. The developed feedback system ensures stabilization of monochromatic radiant power with standard deviation up to 0.025 %. Radiant power that proceeds detector under test or absolute cryogenic radiometer varies from 0.1 to 1.5 mW in dependence of wavelength. The spectral power distribution of its monochromatic source for various operating mode is presented.


2019 ◽  
Vol 2 (3) ◽  
pp. 141-151
Author(s):  
O. E. Gnezdova ◽  
E. S. Chugunkova

Introduction: greenhouses need microclimate control systems to grow agricultural crops. The method of carbon dioxide injection, which is currently used by agricultural companies, causes particular problems. Co-generation power plants may boost the greenhouse efficiency, as they are capable of producing electric energy, heat and cold, as well as carbon dioxide designated for greenhouse plants.Methods: the co-authors provide their estimates of the future gas/electricity rates growth in the short term; they have made a breakdown of the costs of greenhouse products, and they have also compiled the diagrams describing electricity consumption in case of traditional and non-traditional patterns of power supply; they also provide a power distribution pattern typical for greenhouse businesses, as well as the structure and the principle of operation of a co-generation unit used by a greenhouse facility.Results and discussion: the co-authors highlight the strengths of co-generation units used by greenhouse facilities. They have also identified the biological features of carbon dioxide generation and consumption, and they have listed the consequences of using carbon dioxide to enrich vegetable crops.Conclusion: the co-authors have formulated the expediency of using co-generation power plants as part of power generation facilities that serve greenhouses.


2015 ◽  
Vol 11 (5) ◽  
pp. 27-31
Author(s):  
O.V. Kyrylenko ◽  
◽  
B.S. Stognii ◽  
M.F. Sopel ◽  
S.Ye. Tankevych ◽  
...  

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