Evaluation and improvement proposals of uninterruptible power supply of the electronic system, within the battery system, for X2000 trains at EuroMaint AB

Abstract

The Swedish high speed train X2000 was constructed by ABB between 1989 and 1998. The X2000 has in recent years been suffering of various problems regarding the electronics in the railcar. Different properties of the electronic system makes the reliability less satisfying. The need for refurbishment is therefore substantial. The purpose with this report is to evaluate and give improvement proposals of the electronic system, within the battery system for the X2000 railcars. The electronic system that is in use today were studied and described to understand what possible improvements that could be made. Research was done to investigate what power units the market hold for rolling stock and what solutions that was possible to realize. Two improvement proposals were developed and presented. The first proposal imply a total modernization of the electronic system. The second proposal is a less extensive solution which increases the lifetime of the original electronic system. With the proposals described in the report, the system reliability is improved and voltage interferences are suppressed. New converters are introduced with higher efficiency and power density compared with those used today. This minimizes the losses and enables more free space for future installations in the railcar.