scholarly journals DEVELOPMENT OF COMPUTER MODEL OF PARALLEL OPERATION OF THE GENERATING UNIT AND THREE-PHASE NON-INERTIAL POWER SUPPLY

2015 ◽  
Vol 7 (2) ◽  
pp. 191-197
Author(s):  
Sergey Yurevich Trudnev ◽  
Keyword(s):  
Computer Model ◽  
Power Supply ◽  
Parallel Operation ◽  
Three Phase

scholarly journals Model of the traction and external power supply system joint operation

2021 ◽  
Vol 2131 (4) ◽  
pp. 042093
Author(s):  
A V Agunov ◽  
A T Burkov ◽  
M A Ivanov
Keyword(s):  
Computer Model ◽  
Power Supply ◽  
Single Phase ◽  
Joint Operation ◽  
Traction Network ◽  
Mathematical Expressions ◽  
Three Phase ◽  
External Power ◽  
Traction Power Supply ◽  
External Power Supply

Abstract The paper presents a description of mathematical model designed to study the joint operation of 25 kV alternating current traction power supply systems and 110 - 750 kV power supply systemsThe design concept of three-phase and single-phase PU-generators on the basis of the EMF source behind inductive resistance as well as three-phase and single-phase loads is considered. Based on the above mathematical expressions, a computer model has been developed to analyze the joint operation of three-phase networks of external power supply and single-phase traction networks. The model is implemented in the software package MATLAB -Simulink. Using this computer model the influence of power overflows in the 110 - 330 kV network of PJSC “Karelenergo” and PJSC “FGC UES” on the equalizing currents in the traction network of the Knyazhaya-Idel’ section of the October railroad was analyzed. Brief analysis of modeling results is presented.

Discussion Based on the Condition of Transformer Parallel Operation

2014 ◽  
Vol 496-500 ◽  
pp. 982-985
Author(s):  
Xiao Qing Yan ◽  
Yun Lan Ruan ◽  
Fei Cao
Keyword(s):  
Power Supply ◽  
Theoretical Basis ◽  
Short Circuit ◽  
Parallel Operation ◽  
Operation Efficiency ◽  
Unit Value ◽  
Three Phase ◽  
Circuit Impedance ◽  
Supply Reliability

When three-phase transformer runs parallel, power supply reliability can be improved effectively , and the number of transformer running parallel can be adjusted according to the size of the load ,which can improve the operation efficiency of the whole, in addition, it reduce the loss of transformer effectively, so as to improve the economy of power supply, but the two transformer works at the same time, they must meet the same ratio、connecting groups、per-unit value of short-circuit impedance and short-circuit impedance angle as the three conditions. This paper based on the principle of the parallel operation of transformers gives the corresponding theoretical basis. The conclusion shows that the parallel transformer which satisfies the above three factors can run normally.

Regulator Circuit Transformer Voltage-Second Product Analysis

2014 ◽  
Vol 529 ◽  
pp. 501-505
Author(s):  
Chi Zhang ◽  
Ming Zhi He
Keyword(s):  
Power Supply ◽  
Power Electronic ◽  
Product Analysis ◽  
Power Regulator ◽  
Current Voltage ◽  
Three Phase ◽  
The Impact ◽  
Power Electronic Technology ◽  
Primary Current

With the continuous development of power electronic technology, the advantages of thyristor power regulator circuit gradually get more and more applications. It improves the quality of power supply, makes the equipment efficiency and power factor higher and so saves a lot of electricity. Through the calculation of the primary current when thyristor turns off in three-phase power regulator circuit with transformer load, the impact of the thyristors turn-off order on the transformer primary current voltage-second product is analysised, and through simulation the exactness is verified.

Selection and substantiation of main design parameters of catenary suspension for three-phase traction power supply system on tangent level track

2021 ◽  
pp. 69-77
Author(s):  
Boris Alexeevich Arzhannikov ◽  
◽  
Alexander Viktorovich Paranin ◽  
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Current Collector ◽  
Supply System ◽  
Design Parameters ◽  
Main Design ◽  
Traction Power Supply System ◽  
Three Phase ◽  
Traction Power Supply ◽  
Traction Power

At development of common concept of current collection for three-phase traction power supply system there is the need to select and substantiate main design parameters of catenary suspension. For this purpose, the authors have carried out analytical calculations and developed a numerical mathematical model that allows assessing catenary statics and it’s dynamics in interaction with current collector. On the basis of results of modeling, the authors have substantiated and selected all the required parameters. In particular, they have determined the permissible speed of trains and maximal length of catenary spans.

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