Electronic ground automatic neutral section passing device

Abstract

The invention discloses an electronic ground automatic neutral section passing device. The electronic ground automatic neutral section passing device comprises a train direction and position detection unit, an electronic switching valve bank unit and a central controller unit. By detecting the voltage of an alpha phase, a neutral section and a beta phase, the central controller unit determines the optimal switch-on moment according to train running direction and arrival position signals output by a train position signal processing unit so as to achieve the effect of minimum overvoltage impact and minimum overcurrent impact, and the central controller unit sends synchronous triggering switch-on or switch-off signals so as to achieve the ground automatic neutral section passing function of a train. By means of the electronic ground automatic neutral section passing device, train operation time is shortened, line carrying capacity is improved, the service life of high-voltage electrical equipment on the train is prolonged, and operation and maintenance cost is reduced.

Description

technical field [0001] The invention belongs to the field of automatic ground phase separation in the electrical phase separation section of a railway catenary network, and in particular relates to an electronic automatic ground phase separation device for railways. Background technique [0002] The power supply network of my country's power system adopts three-phase AC power supply, while the electrified railway adopts single-phase power frequency AC traction power supply. In order to balance the load of the three-phase power supply network of the power system and improve the utilization rate of the power grid, the electrified railway catenary adopts a segmented and phase-separated power supply method. In order to prevent short circuit between phases, each phase is separated by air or insulator, which is called electric phase separation. When an electrified train draws electricity from the catenary, there is a problem of how to separate the phases of the electricity. [0...

AI Technical Summary

Problems solved by technology

The disadvantages of this technical solution are: first, it is essentially a power failure with excessive phase separation, the power failure time is longer, and the traction force and speed have a certain loss, especially for ordinary electric locomotives with heavy freight and electric phase separation on large slopes. The electric locomotives or high-speed EMUs on the road have a large speed loss, which reduces the overall transportation capacity of the railway; second, the main circuit breaker on the vehicle is frequently disconnected, has a short life, requires regular maintenance and replacement, and has high operating costs; third, the main circuit breaker The disconnection of the breaker will bring a high operating overvoltage impact to the electric locomotive or high-speed EMU, and accelerate the insulation aging of the high-voltage electrical equipment on the train; fourth, because the electric split phase has always been a high-frequency fault-prone area for electromechanical and pantograph-catenary coordination , the train driver needs to monitor the working reliability of the electric phase splitting device, which may easily lead to driver fatigue

The test results show that the ground switch automatic switching over-phase splitting device can be compatible with the Japanese models of the CRH2 series, but its overvoltage level and neutral section dead time cannot match the models of CRH1, CRH3, CRH5, CRH6 and other series , resulting in this technical solution not being applied to my country's high-speed railways

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