Distributed Module-Based Power Supply Enhancement System for 3 kV DC Traction

Abstract

This paper presents a conception of 3 kV DC traction power system based on distribution sources, as an alternative to traditional traction substation. The system consists of supplying modules (SM) installed along the electrified railway line, the distance between adjacent SMs are much shorter, than between traditional traction substations in 3 kV system. Each SM consists of energy storage system (ESS), and could be charged from adjacent, traditional traction substation via catenary, via medium voltage supplying lines, renewable power sources or by energy recuperation. In the article, the main parameters of the proposed supplying system operation have been compared with parameters of the system with traditional traction substation. For this purpose, in a case study, comparison analysis has been carried out for energy losses in catenary, 15-min peak power demand as well as the cost of the system installation. At the end, the reliability analysis has been carried out for proposed distribution power supply system and for traditional one.

Advances in Electric Traction System—Special Issue

“…The papers presented in this Special Issue cover a wide range of selected problems of advances in electric traction systems [1][2][3][4][5][6][7][8], electric drives for ground and air transport [9][10][11], DC [12,13] and AC [14,15] power supply used in network traction, automation and control [16,17], and energy savings that help the environment [18].…”

“…Paper [12] presents research on decentralized supply of a 3 kV DC railway system using low-power supplying modules (SM) instead of traditional high-power traction substations. The modules make up a kind of smart grid and consist of energy storage devices with DC/DC converters connected to catenary, that can be supplied by local RES (photovoltaic, wind generators), and connected to local distribution networks.…”

“…Short-circuits in DC traction supply lines has been an important issue in traditional systems with rectifier substations, and the problem has been additionally complicated by new solutions using energy storage devices as in [12], which is comprehensively discussed in [13]. A simulation Matlab model was applied for the calculation of short-circuit currents, and the results were compared with theoretical calculations standardized in EN 50123-1.…”

Positive Rail Voltage Rise Behavior and Inhibition Analysis of Regenerative Braking of Medium–Low-Speed Maglev Train

“…In addition, although the supply voltage level of DC 0.75 kV or DC 1.5 kV has been generally adopted, the construction of a DC 3 kV system has excellent prospects due to the advantages of fewer substations, lower traction waste, etc. Some scholars have studied the RB issues of a DC 3 kV traction grid [7][8][9][10]. The main focus has been on energy conservation.…”