Converter Design for a Railway Voltage Booster Using Two Simulators

This paper presents a technique on how two simulators at different levels of abstraction can interact for the design and sizing of a booster power unit. The system is constituted by an ultracapacitor bank and a converter to boost voltage sags in a railway application. Full steps to determine Thevenin equivalent circuit of a dc railway is obtained based on exact modeling of the system components. Example of converter design as well as voltage and current profile of a typical network fed by energy storage system is discussed. Concluding simulation results show the performance of the software used to validate the railway load and the proposed technique.