Electrical locomotive overvoltage suppression absorbing system and control method thereof

Abstract

The invention relates to an electrical locomotive overvoltage suppression absorbing system, which comprises an overvoltage suppression absorbing device and an overvoltage suppression absorbing system control device, wherein the overvoltage suppression absorbing device and electrical locomotive core electric equipment are connected in parallel to a secondary side winding of an electrical locomotive high voltage transformer, and the overvoltage suppression absorbing device is used for suppressing and absorbing overvoltage generated by operation when an electrical locomotive passes a split phase; and the overvoltage suppression absorbing system control device is connected with the overvoltage suppression absorbing device and is used for controlling the action of the overvoltage suppression absorbing device when the electrical locomotive passes the split phase, and cutting off the overvoltage suppression absorbing device after the electrical locomotive passes a split phase area. In addition, the invention also discloses a control method for the electrical locomotive overvoltage suppression absorbing system. The Electrical locomotive overvoltage suppression absorbing system and the control method thereof can better solve the problem of operating overvoltage of the electrical locomotive, protect locomotive equipment and power supply system equipment from the influence of the overvoltage, and further improve the railway transportation safety.

Description

technical field [0001] The invention relates to the field of electric locomotives, in particular to an electric locomotive overvoltage suppression absorbing system and a control method thereof. Background technique [0002] With the rapid development of the national economy, electric locomotives are widely used in the field of rail transportation because of their advantages such as high efficiency and low pollution, and represent the development direction of contemporary railway transportation. An electric locomotive is a locomotive that obtains electric energy from the catenary and is driven by an electric motor. my country's electrified railway adopts single-phase power frequency AC system, and its catenary rated voltage is single-phase power frequency 25kV AC, and the electric energy is introduced into the locomotive through the pantograph on the top of the locomotive. The rectification device transforms the voltage and rectifies it into direct current, which is then supp...

AI Technical Summary

Problems solved by technology

When the electric locomotive passes through the phase-separation zone and performs main-break or main-break operation, when the main circuit breaker is opened or closed, due to the sudden change of the working state in the power supply system, a fault will be formed on the primary winding side of the high-voltage transformer 11 of the electric locomotive. The instantaneous high voltage causes the amplitude of the output voltage of the 11th side winding side of the high-voltage transformer of the electric locomotive to be higher than the rated value of the working voltage of the core electrical equipment 12 of the electric locomotive, which often leads to the burning of the electrical equipment of the locomotive and the failure of the power supply system. Conducive to the safe operation of locomotives

[0005] However, at present, there is no better way to solve the problem of operating overvoltage of electric locomotives at home and abroad. Solving the problem of operating overvoltage of electric locomotives and protecting locomotive equipment and power supply system equipment from overvoltage are urgent tasks for further improving railway transportation safety.

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