The Influence on High-Speed Electrical Multiple Unit by Fluctuation of Traction Power System’s Voltage

2011 ◽  
Vol 383-390 ◽  
pp. 7455-7460
Author(s):  
Rui Kuo Liu ◽  
Chun Yang Chen ◽  
Yan Xia Lu
Keyword(s):  
Simulation Model ◽  
Power Supply ◽  
High Speed ◽  
Power Supply System ◽  
Load Condition ◽  
Supply System ◽  
Pwm Rectifier ◽  
Traction Power Supply System ◽  
Traction Power Supply ◽  
Traction Power

The duplicate rectifier’s control strategy and principle are researched. Besides this paper derivers a formula for calculating support capacitor from the relation of power transfer in rectifier. Established simulation model of Traction Power Supply System based on Matlab/Simulink, in order to build platform of Traction Power Supply System’s load condition on digital simulation tests. Through coupling the simulation model of Traction Power Supply System and PWM rectifier, analyzes adaptability of PWM rectifier when the fluctuation of the supply conductor voltage. So we need cut down the railway vehicle’s power when the voltage too low or too high.

scholarly journals A Novel Co-Phase Power-Supply System Based on Modular Multilevel Converter for High-Speed Railway AT Traction Power-Supply System

Energies ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 253
Author(s):  
Si Wu ◽  
Mingli Wu ◽  
Yi Wang
Keyword(s):  
Power Supply ◽  
High Speed ◽  
Power Supply System ◽  
Supply System ◽  
High Speed Railway ◽  
Traction Power Supply System ◽  
Traction Power Supply ◽  
Supply Mode ◽  
Power Supply Mode ◽  
Traction Power

The existing problems of the traction power-supply system (i.e., the existence of the neutral section and the power quality problems) limit the development of railways, especially high-speed railways, which are developing rapidly worldwide. The existence of the neutral section leads to the speed loss and traction loss as well as mechanical failures, all of which threaten the fast and safe operation of the train and the system. Meanwhile, the power quality problems (e.g., the negative sequence current, the reactive power, and the harmonic) can bring a series of problems that cannot be ignored on the three-phase grid side. In response, many researchers have proposed co-phase power-supply schemes to solve these two problems simultaneously. Given that the auto-transformer (AT) power-supply mode has become the main power-supply mode for the high-speed railway traction power-supply system, it has a bright future following the rapid development of the high-speed railway. In addition, there is no co-phase power-supply scheme designed for AT power-supply mode in the existing schemes. Therefore, the main contribution of this paper is to propose a specifically designed power-supply mode more suitable for the AT, as well as to establish the control systems for the rectifier side and the inverter side. In addition, for the proposed scheme, the operation principle is analyzed, the mathematical model is built, and the control system is created, and its functionality is verified by simulation, and its advantages are compared and summarized finally. The result proves that it can meet functional requirements. At the same time, compared with the existing co-phase power-supply scheme, it saves an auto-transformer in terms of topology, reduces the current stress by 10.9% in terms of the current stress of the switching device, and reduces the power loss by 0.25% in terms of the entire system power loss, which will result in a larger amount of electricity being saved. All of this makes it a more suitable co-phase power-supply scheme for the AT power-supply mode.

Development of software elements for improvement of calculation of traction power supply system

2021 ◽  
pp. 64-68
Author(s):  
Ivan Vladimirovich Ignatenko ◽  
◽  
Evgeniy Yuryevich Tryapkin ◽  
Sergey Anatolyevich Vlasenko ◽  
◽  
...  
Keyword(s):  
Power Supply ◽  
High Speed ◽  
Power Supply System ◽  
Heavy Traffic ◽  
Supply System ◽  
Software Complex ◽  
Software Products ◽  
Traction Power Supply System ◽  
Traction Power Supply ◽  
Traction Power

Nowadays KORTES remains the main software complex for calculation of traction power supply system. However, in regard with the development of software and hardware facilities and the necessity to gain precise results the most important task is the improvement of separate software products aimed at refinement of calculation and solution of such tasks as thermal processes in traction power supply system, change of parameters at high-speed and heavy traffic and etc. The paper presents an algorithm developed for power supply system of mainline railway section, which allows calculating required power of transformers installed in traction substation not only for classic, but also for other schemes of connection of transformer winding.

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