scholarly journals APPLICATION OF CONTROLLED SOURCES OF REACTIVE POWER IN TRACTION POWER SUPPLY SYSTEMS

2016 ◽  
Vol 20 (9) ◽  
pp. 103-110
Author(s):  
Aleksandr Cherepanov ◽  
Anton Kutsyi ◽  
◽  
◽  
Keyword(s):  
Power Supply ◽  
Reactive Power ◽  
Traction Power Supply ◽  
Supply Systems ◽  
Traction Power

scholarly journals Analysis of compensating devices efficiency in ac traction power supply systems

2021 ◽  
Vol 2131 (4) ◽  
pp. 042083
Author(s):  
A V Agunov ◽  
D A Sokolov
Keyword(s):  
Power Supply ◽  
Reactive Power ◽  
Electricity Consumption ◽  
Traction Power Supply System ◽  
Consumption Reduction ◽  
Before And After ◽  
Compensating Devices ◽  
Traction Power Supply ◽  
Supply Systems ◽  
Traction Power

Abstract The article describes the main methods of reactive power compensation used in 27.5 kV AC traction power supply systems on the railways of the Russian Federation. The cases of installation of the longitudinal and transverse capacitive compensation devices at traction substation and sectiolizing post are considered in this paper. Based on experimental data their effectiveness has been analysed by comparing the main parameters of the traction power supply system before and after the installation of the compensating devices. The main effect in terms of power consumption reduction is achieved through application of reactive power cross-compensation devices. The results of the analysis show that the total electricity consumption in the researched area decreased by 23 % and the proportion of higher harmonic elements of voltage decreased by 15 %.

scholarly journals Feedforward Compensation of Railway Static Power Conditioners in a V/v Traction Power Supply System

Electronics ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 656
Author(s):  
Yaoguo Li ◽  
Jiaxi Hu ◽  
Zhaohui Tang ◽  
Yongfang Xie ◽  
Fangyuan Zhou
Keyword(s):  
Power Supply ◽  
Reactive Power ◽  
Feedforward Control ◽  
Optimization Method ◽  
Compensation Error ◽  
Two Factors ◽  
Static Power ◽  
Traction Power Supply ◽  
Supply Systems ◽  
Traction Power

Railway static power conditioners (RPC) usually improve the power quality of traction power supply systems only according to the active power of the load, which leads to inaccurate compensation. There are two factors that restrict the performance of RPC, one of which is the reactive power of the load, and the other is the system error. In order to eliminate the compensation error, a compensation optimization method is proposed. First, calculate the reactive power compensation value for the reactive power of the load. Second, introduce the amplitudes and phases of the primary currents of the V/v transformer as references for the compensation error caused by the system loss and then use fuzzy control to optimize compensation. The compensation method proposed in this paper is actually a feedforward control. In addition, this method balances the three-phase currents and enables RPC to be used in railway power supply systems with low locomotive power factors. The effectiveness of the method proposed in this paper has been confirmed by the simulation results.

scholarly journals The method for increasing the efficiency of equipment’s maintenance in railway traction power supply systems

2018 ◽  
Vol 47 (3) ◽  
pp. 39-47 ◽  
Author(s):  
Oleksandr Matusevych ◽  
Valeriy Kuznetsov ◽  
Viktor SYCHENKO
Keyword(s):  
Power Supply ◽  
Operational Reliability ◽  
Technical Condition ◽  
Repair System ◽  
Maintenance And Repair ◽  
Traction Substations ◽  
Electric Equipment ◽  
Traction Power Supply ◽  
Supply Systems ◽  
Traction Power

Purpose. To develop the method for increasing the efficiency of the equipment’s maintenance and repair system, ensuring necessary level of operational reliability of the equipment, safety and reliability of the electric equipment with minimal expenses on operation. Relevance. Aging of the power equipment in railway power supply systems sharply raised a need for assessment of its states and degree of risk for operation outside rated service life. In critical conditions of technological processes and operational modes of the railways it is necessary to increase the equipment’s operational reliability. The scheduled maintenance and repair system whose main technical and economic criterion is the minimum of equipment’s downtimes on the basis of a rigid regulation of repair cycles, in the conditions of market regulations in the field of repair in many cases does not provide the optimal decisions due to insufficient financing. The solution of this problem is possible by improvement of the maintenance and repair system. Under these conditions the main direction for supporting the operational reliability of power electric equipment on TS is a development of the modern methods based on individual supervision over real changes of technical condition of power equipment. Scientific novelty. In this article the authors proposed an integrated approach, on the basis of which can be developed the effective maintenance and repair system for traction power supply systems. Proposed approach allowed to react quickly to changes of service conditions on traction substations, to control the technical condition of power electric equipment under the conditions of uncertainty, to establish interrelation between quality of service and operational reliability of the equipment, to choose a service strategy on traction substations. Practical importance. The validity of the developed method was confirmed by the results of calculations and practically by choosing the optimal maintenance's option for transformer TDTN-25000/150-70 U1 (ТДТН-25000/150-70 У1) on traction power supply substation.

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