Exergetical Performance Analysis of Railway Transportation Systems with Three Levels Converters

摘要

The merit of an electric transportation system is based not only on technical performance, safety, energy efficiency, societal and economic acceptance and but also on environmental impact and exergy efficiencies. Costs should reflect value and value is not associated with energy but with exergy and sustainability. This paper aimed at examining an electric railway locomotive viewed as a system where different energy forms occur. In this goal, the paper describes the mathematical models and structural diagrams of the traction induction motors, useful movement, three levels voltage-source inverter and line-side converter used on the locomotive fed from AC line. The overall structural diagram construction for the principle schemes corresponding to modern locomotives is also presented. At the end are shown the simulated waveforms of the three levels converters.