Train regenerative braking failure suppression device and control method thereof

Abstract

The invention provides a train regenerative braking failure suppression device and a control method thereof, and relates to the technical field of electric power quality control of electrified railways. The DC sides of two single-phase converters are connected in parallel with an energy storage device and a support capacitor, and the AC sides are respectively connected in parallel with the load ofrespective power supply arms; a measurement and control unit obtains traction network tail end voltage and feeder line current of the two power supply arms through a voltage transformer and a currenttransformer so as to control the energy storage device and the two single-phase converters in real time. The main goal is to suppress the train regenerative braking failure, when the voltage at the tail end of each power supply arm exceeds a normal range, the measurement and control unit controls the converters and the energy storage device, and the voltage at the tail end of the traction networkis reduced by balancing the load of the power supply arms at two ends of a partition, storing regenerative braking energy and absorbing inductive reactive power, so that the train regenerative braking failure is suppressed.

Description

technical field [0001] The invention relates to the field of electrified railways, in particular to the technical field of power quality control of electrified railways. Background technique [0002] Ensuring the power quality of electrified railways is an important condition to ensure the safe operation of electric locomotives, and the voltage level at the end of the power supply arm of some lines has become the primary problem restricting power quality. [0003] With the continuous development of power electronic AC drive technology, my country has basically completed the upgrade from AC-DC electric locomotives to AC-DC electric locomotives. AC-DC electric locomotives can use regenerative braking, feedback regenerative braking energy, and be The adjacent locomotive absorbs or feeds back the three-phase grid. However, almost the entire power supply arm of some lines is on a long slope, and most electric locomotives on the power supply arm are in the regenerative braking con...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a train regenerative braking failure suppressing device, which can effectively solve the train regenerative braking failure caused by excessive voltage at the end of the power supply arm, and can also support the end voltage, and take into account both ends of the partition The load balance of the power supply arm and the technical problem of improving the utilization rate of regenerative braking energy

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