Novel method and device for phase separation control of ground surface over-current

A technology of over-current phase separation and control method, which is applied to power lines, transportation and packaging, and vehicle parts, etc., can solve problems such as increasing system complexity and cost, closing surge overcurrent, and production cut-off overvoltage, etc., to achieve Avoid cut-off overvoltage and closing surge overcurrent, eliminate cut-off overvoltage, and reduce requirements
CN101837744AInactive Publication Date: 2010-09-22SOUTHWEST JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
SOUTHWEST JIAOTONG UNIV
Publication Date
2010-09-22
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention discloses a novel method and a novel device for phase separation control of ground surface over-current. The method comprises the followings steps of: determining A and B phase voltage phases of a contact line according to locomotive position sensors CG1, CG2, CG3 and CG4 arranged on a rail and contact line voltage phase detection modules M1 and M2 used for detecting the voltage phases of the contact line; and using a controller to control the connection and the disconnection of switching devices K1 and K2 consisting of full-control type power electronic devices so as to realize ground surface bumpless transfer over-current phase separation of an electric locomotive. The method and the device realize the bumpless transfer of the electric locomotive (a motor train unit) during the ground surface over-current phase separation so as to avoid the generation of a cut-off current over-voltage and a switch-on surge over-current, and reduce requirements on the switching devices. The method and the device have a high switching speed and can short the power-cut time for a train to pass through a phase separation area.
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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 โ€‹โ€‹the power supply arm of the next phase, the driver closes the main breaker, starts the aux...

Claims

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