scholarly journals Analysis of power losses in catenary wires in AC electric traction power supply systems when installing a device for shunt compensation of reactive power

2021 ◽  
Vol 1151 (1) ◽  
pp. 012008
Author(s):  
A V Agunov ◽  
A D Komissarov ◽  
V V Seronosov ◽  
D A Sokolov ◽  
O A Stepanskaya
Keyword(s):  
Power Supply ◽  
Reactive Power ◽  
Power Losses ◽  
Shunt Compensation ◽  
Traction Power Supply ◽  
Electric Traction ◽  
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.

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