Simulation model of instantaneous electrical and power parameters of mode and quality of electricity for DC traction power systems

Abstract

The nature of the electricity consumption in TPS makes the loading of traction substations. On the basis of previous studies of qualitative characteristics of the DC traction power system, the shortcomings related to work of driven power transformers at DC substation and at the electric locomotives were identified. Thus, further increasing of electric railway equipment with adjustable converters sets the problem to investigate the influence of its work on the magnitude of harmonic of voltage and current in the catenary system. Aim: The aim of this research is to develop a simulation model of instantaneous electrical and power parameters of mode and quality of electricity for DC traction power systems under conditions of current distortion. Materials and Methods: Using the methods of the theory of electrical engineering, the model for continuous calculation of instantaneous mode parameters of the DC traction power systems is developed. Results: Based on the analysis of the structure of modern traction electric part of electric locomotives that get energy via DC catenary system, we found that the electricity regime may be described qualitatively only considering the higher harmonic settings of the operation mode. Influence of parameters of a catenary system, due to the presence of harmonic components in the current and voltage requires consideration in the calculation regime the effective resistance as well as the inductance of circuit elements. The obtained results can be used in the formation of the requirements for electricity metering at sites of railways where operated electric locomotives with traction electrical complex, which has a semiconductor converters.

Keywords

• DC traction power supply system
• timetable
• quality indicators of electricity