Ground automatic passing phase circuit and a control method, device and system thereof

Abstract

The invention provides a ground automatic passing phase circuit and a control method, device and system thereof. A high-voltage winding of a first transformer of the ground automatic passing phase circuit is connected with a first supply arm; the first end of an alternating current / direct current converter is connected with a low-voltage winding of the first transformer; a current sensor is connected with the first end of the alternating current / direct current converter and the low-voltage winding of the first transformer; the second end of a direct current / alternating current converter is connected with the second end of the alternating current / direct current converter; the two ends of a voltage sensor are connected with the second end of the direct current / alternating current converter and the second end of the alternating current / direct current converter; a low-voltage winding of a second transformer is connected with the first end of the direct current / alternating current converter, and a high-voltage winding of the second transformer is connected with a neutral zone supply arm; and each of the alternating current / direct current converter and the direct current / alternating current converter comprises H bridges of four switch devices, and a train can quickly and stably pass through a phase-separating section.

Description

technical field [0001] The present invention relates to the field of automatic phase separation, in particular to a ground automatic phase separation circuit and its control method, control device and control system. Background technique [0002] The primary side of my country's electrified railway traction substation is generally three-phase 110kV or 220kV. In order to balance the load power of three-phase voltage, my country's electrified railway catenary adopts single-phase 25kV segmental commutation power supply, and adjacent different voltage phases There is a phase separation area without power between the power supply sections. [0003] Before the train enters the phase separation area, a series of on-board actions are required according to the signal of the position sensor buried on the ground: reduce the traction power to 0, block the four-quadrant converter, cut off the vacuum circuit breaker on the train, and the traction inverter Switch to the micro-voltage syste...

AI Technical Summary

Problems solved by technology

In addition, due to the inconsistency of the phases of the front and rear power supply arms, most of the automatic over-phase devices on the ground will cause over-current or over-voltage shocks in the traction system of the train.

Therefore, most of the above-mentioned devices have high cost and low reliability, and basically do not have the feasibility of application in the railway field, and cannot ensure that the train passes through the phase separation zone quickly and smoothly.

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