Computer Simulation of Processes in the Traction Drive of a DC Electric Locomotive Based on Induction Motors at an External Short Circuit

This article examines the results of a simulation of transient electromechanical processes in the traction drive of a DC electric locomotive that occurs during an external short circuit (a short circuit in the catenary). A hypothesis regarding the feasibility of controlled electrical braking of a traction induction motor in this situation is analyzed. It has been shown that controlled electrical braking of a motor is possible in the case of significantly reducing the opening time of a high-speed circuit breaker's contacts compared to what actually occurs. However, this significantly increases the potential difference between the circuit breaker's contacts during opening.