Dimensioning DC Traction Substations with Realistic Traffic Scenarios

摘要

The study of energy consumption is fundamental for railway systems in general and for DC electrified railway systems in particular. It plays an important role in order to design a proper dimensioning of traction Substations (SSs). DC electrical multi-train simulators allow studying a lot of electrical variables that are related to energy consumption and, therefore, to electrical dimensioning. One of the main inputs to the electrical simulator is the traffic data. This research studies two new variables which improve the information of the traffic data and analyzes their possible influence on energy consumption and, consequently, on the SSs dimensioning. These variables are: a) dwell time in the stations, b) time shift in terminal stations. In order to reduce simulation time, the simulation has been divided into two stages. At the first stage a large number of simplified simulations with a lot of combinations of dwell time and time shift is performed. At the second stage, the most representative scenarios obtained with the simplified simulations are simulated in the detailed electrical simulator. Results show that the simulations obtained with the addition of these new variables make it possible to obtain more realistic consumption values. This, in turn, allows a more accurate dimensioning of the SSs and a consequent reduction of their size (e.g. a reduction between 50% and 66.7% in the transformers size).