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Control method based on cascade multilevel ground electrical phase-splitting device

A cascaded multi-level, over-power phase separation technology, applied in power lines, transportation and packaging, vehicle components, etc., can solve the problems of production cut-off over-voltage, auxiliary system over-current, and high switching requirements.

Inactive Publication Date: 2014-06-18
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] To sum up, there are the following problems in the existing ground over-current phase-splitting device: 1) Since it is a full-load breaking switch in the whole process, the requirements for the switch are relatively high; 2) When the neutral section voltage is converted, the load If the split-phase switch is disconnected, a cut-off overvoltage will be generated; 3) When the voltage is switched in the neutral section, the voltage phase before and after the switch is inconsistent, and there will be a difference in the steady-state magnetic flux of the traction transformer on the locomotive. Saturation causes closing surge overcurrent
For locomotives that rotate the motor and draw power from the traction transformer, it will also cause overcurrent in the auxiliary system when the switch is closed

Method used

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  • Control method based on cascade multilevel ground electrical phase-splitting device
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  • Control method based on cascade multilevel ground electrical phase-splitting device

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with drawings and embodiments.

[0019] According to the determination of locomotive position by locomotive position sensors CG1, CG2, CG3 and CG4 on the track and the determination of catenary A and B phase voltage phases by catenary voltage phase detection modules M1 and M2 for measuring the catenary voltage phase , the output voltage is controlled by the controller of the cascaded multi-level ground over-current phase-splitting device to realize the flexible passing of the electric locomotive through the phase-separation; image 3 As shown, the specific implementation of the control method is as follows:

[0020] 1. When the train runs from CG1 to CG4,

[0021] 1) When the electric locomotive (or EMU) reaches CG1, control the output of the cascaded multi-level inverter so that the amplitude, frequency and phase of the output voltage are consistent with the A-phase bridge arm;

[0022] 2) After the...

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Abstract

The invention discloses a control method based on a cascade multilevel ground electrical phase-splitting device. According to the method, an inverter part of the cascade multilevel ground electrical phase-splitting device is controlled; bumpless transfer between two adjacent bridge arm voltages of neutral section voltage is realized by adjusting the amplitude and the frequency of the inverter when a train is positioned at the neutral section; in addition, an electric locomotive (or a motor train unit) flexibly passes electricity phase splitting, no impact on a touch net and the electric locomotive (or the motor train unit) is found and the requirement on a switch device can be reduced. The train can realize uninterruptible power supply and passes electricity phase splitting. The significance of the control method is that the through type power supply can be realized on the touch net with electricity phase splitting based on hardware.

Description

technical field [0001] The invention relates to the field of manufacturing AC / DC / AC electric locomotives (EMUs) and ground overcurrent phase separation devices for AC / DC electric locomotives. Background technique [0002] There are many methods for electric locomotive (EMU) over-voltage phase separation. In the early days, the speed of trains was relatively slow, and manual over-power phase separation was usually used. There was a phase-separation sign in the phase-separation area to instruct the driver to operate over-power 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 aux...

Claims

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Application Information

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IPC IPC(8): B60M3/04
Inventor 熊成林王顺亮冯晓云
Owner SOUTHWEST JIAOTONG UNIV
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