The result of the project will be a complex software tool for calculations of traction network modeling 25kV 50 Hz powered by controllable sources of static frequency converters (SFCs) and prediction of properties for max.efficiency and safety.SW modeling and prediction will provide SFC technology setup.control curves SFC for cooperation of sources and efficiency of energy system of normal load and calculations of setup.network protection.It will include life cycle control of output characteristics SFC in power stations and setup.stanč.protection for tent.zones.