MODELING EMERGENCY PROCESSES OF ELECTRIC LOCOMOTIVE REVERSIBLE CONVERTERS UNDER CONTROL PULSE SKIP

Abstract

The PURPOSE of the paper is to improve the efficiency of AC electric locomotive in the regenerative braking mode under control pulse skip supporting the inversion process and retaining the electric locomotive braking force. METHODS. The study uses the following methods: mathematical modeling, numerical methods for solving integral and differential equations, the theory of transforming devices. The experiments were carried out using a mathematical model “traction substation - catenary network - electric locomotive" in MatLab Simulink environment. RESULTS. Electromagnetic processes has been analyzed in electric locomotive power circuits under control pulse skips to the thyristors of one of the shoulders of the reversible converter. The curves of generator currents and inverter voltages have been obtained in the course of mathematical modeling of the electromagnetic processes of the electric locomotive inverter in the mode of regenerative braking under control pulse skips. CONCLUSIONS. Having analyzed the curves of generator currents and inverter voltage we have proposed a technical solution that enables to improve the efficiency of AC electric locomotive in the regenerative braking mode that is implemented through changing the software of the microprocessor control system of an electric locomotive. The developed solution allows to support the inversion process and retain locomotive braking force.