Short Circuit Modelling and Simulation of 2×25 kV High Speed Railways

Improving power supply design for high speed lines and 2 × 25 systems using a genetic algorithm

“…The importance of securing a sturdy reliable method to improve the design process has led to work undertaken on a number of lines of research in recent years. Batistelli et al [6] describe a method to study the basic working conditions of 2x25 systems. The model provides a tool to calculate the currents passing through the catenary, to provide a greater insight into the characteristics of the 2x25 system studied.…”

Influence of High-Speed Train Power Consumption and Arc Fault Resistances on a Novel Ground Fault Location Method for 2 × 25 kV Railway Power Supply Systems

“…There are methods based on different measurements, such as the current relations of the neutral connection in autotransformers [8,9] or measurements made by fault current sensor installations at the connections between the rail and the air cable of ground return [10]. Other research lines are the progressive wave location method [11,12], the domain frequency location methods [13], and methods which compare models in the time domain with others in the frequency domain [14].…”

Modelling, simulation, and verification for detailed short‐circuit analysis of a 1 × 25 kV railway traction system

“…This paper examines a single‐phase 1 × 25 kV RTS in which the key factors determining the fault current are as follows: The short‐circuit capacity (SCC) at the busbar on the primary side of the traction transformer; that is, the source transformer. The winding connections (Le Blanc) and impedance of transformers in traction substations. The self and mutual impedances of overhead contact systems (including overhead messenger wire, overhead trolley contact wire, and return feeders) as well as the rails. Estimating disturbances resulting from the various types of short‐circuit faults require comprehensive data collection with regards to all major components and the overall RTS, while the operating conditions of the RTS (both normal and abnormal) must also be considered. In the technical literature, several studies have been performed on: (i) traction system design, components modelling, and calculation methods [6–11] and (ii) critical and short‐circuit conditions [12–15]. A detailed short‐circuit modelling of a RTS can be derived and implemented in the time and frequency domains.…”