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Automatic power-passing phase-splitting apparatus of AC drive electric locomotive

A technology for electric locomotives and over-power phase separation, which is applied in power lines, vehicle components, transportation and packaging, etc., and can solve the problems of transformer surge current, large locomotive traction loss, and inability to pass the phase separation zone.

Inactive Publication Date: 2009-05-20
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to many operating processes, it takes time for the main circuit breaker to break and the auxiliary system to be shut down and restarted. Therefore, the phase separation section (power failure) takes a long time, which causes a large traction loss of the locomotive. In difficult areas, it may cause the train to stop. , can not pass the phase separation area, and at the same time, the main circuit breaker is frequently opened and closed, which affects the life of the main breaker, and the transformer still has a surge current when it is closed

Method used

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  • Automatic power-passing phase-splitting apparatus of AC drive electric locomotive
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  • Automatic power-passing phase-splitting apparatus of AC drive electric locomotive

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specific Embodiment approach

[0028] Figure 1-3 As shown, a specific embodiment of the present invention is: a method for automatic over-current phase separation of an AC-DC electric locomotive, and its method is as follows:

[0029] A. During normal driving, the traction control system controls the traction motor M to be in the traction working state. After the traction voltage on the power supply arm A is stepped down by the traction transformer T, it is converted into a stable DC voltage by the pulse rectifier PZ and supplied by the filter circuit ZC. The traction inverter is finally converted by the traction inverter NB into three-phase alternating current, which is supplied to the traction motor M to drive the locomotive TR forward.

[0030] B. Before the locomotive enters the neutral section, the traction control system PC controls the traction motor M to work in the regenerative braking state, so that the intermediate DC voltage remains stable, and at the same time controls the pulse rectifier PZ t...

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Abstract

The invention discloses an automatic passage method through phase splitting for an AC-DC-AC electric locomotive which comprises the following steps: before the electric locomotive runs into a neutral section, a traction control system controls a traction motor to work in a regenerative braking mode and controls an inverter to stabilize intermediate DC voltage; a pulse rectifier works in an inversion state; an alternating voltage equal to a traction voltage is generated on the primary side of a traction transformer, thereby making the primary side of the traction transformer obtain zero current from a power supply arm; after the electric locomotive runs into the neutral section, the intermediate DC voltage still maintains stability; the AC phase generated by the inversion of the pulse rectifier in the inversion mode changes gradually so as to make the voltage of the primary side of the traction transformer change to become equal to the traction voltage of a next power supply arm; and then the electric locomotive enters the next power supply arm and runs normally. The method enables the automatic passage through phase splitting; in addition during the phase splitting, a main circuit breaker does not need to be turned on and off without arc discharge, interception overvoltage and closing surge overcurrent, and an auxiliary system is not deenergized; and the passage through phase splitting has short time, low traction loss and small speed drop.

Description

technical field [0001] The invention relates to an automatic over-power phase separation method for an AC-DC-AC electric locomotive. Background technique [0002] There are many methods for locomotive over-electricity and phase separation. In the early days, trains were slow, and manual over-electricity and phase separation were usually used. A phase-separation sign was set in the phase-separation area to instruct the driver to operate over-power and phase separation. Before reaching the neutral section, the driver first reduces the traction level to 0, disconnects the auxiliary system, and then disconnects the main circuit breaker on the primary side of the traction transformer, so that the locomotive passes through the neutral section without electricity. After the locomotive enters the power supply area of ​​the power supply arm of the next phase, the driver closes the main breaker, starts the auxiliary system, and gradually restores the traction level. The labor intensi...

Claims

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Application Information

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IPC IPC(8): B60M3/04
Inventor 郭育华张昆仑连级三丁娜汤坚舒泽亮毕升
Owner SOUTHWEST JIAOTONG UNIV
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