CN-122008919-A - Traction main circuit for train self-running, and train self-running control method and device

CN122008919ACN 122008919 ACN122008919 ACN 122008919ACN-122008919-A

Abstract

The application discloses a traction main circuit for self-walking of a train, a self-walking control method and a self-walking control device of the train, which relate to the field of rail transit, under the working condition of self-walking, a bidirectional charger inverts low-voltage direct current of a storage battery into alternating current and sends the alternating current to a second secondary winding of a three-winding transformer, after boosting, one path of the alternating current is used for supplying power for alternating current loads such as a traction cooling fan and the like through the first secondary winding, the traction inverter is ensured not to overheat after long-time operation, the other path is supplied with power by the middle direct current bus through the primary winding and the auxiliary inverter without control rectification, so that the traction inverter obtains direct current input with high voltage, the output traction and climbing capacity are obviously enhanced, and the traction inverter is completely suitable for the large-station-distance operation scene of the urban train. Compared with the prior art, the application only expands the capacity of the storage battery, realizes energy path multiplexing by using the three-winding transformer, does not need to add an expensive high-voltage energy storage device, and simultaneously, the whole weight of the equipment is obviously reduced, the occupied space is greatly reduced, and the number of equipment interfaces is obviously reduced.

Inventors

ZHENG CAIHUI
YIN HANG
LIANG XIN
SUN FUYUAN

Assignees

中车长春轨道客车股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260306

Claims (10)

1. A traction main circuit for self-propelled running of a train is characterized by comprising a four-quadrant rectifier, a traction inverter, an auxiliary inverter, a three-winding transformer, a bidirectional charger, a storage battery and a traction motor, wherein, The input end of the four-quadrant rectifier is connected with the contact net through the main transformer, and the output end of the four-quadrant rectifier is connected to the middle direct current bus; the input end of the traction inverter is connected with the middle direct current bus, and the output end of the traction inverter is connected with the traction motor; The input end of the auxiliary inverter is connected with the middle direct current bus, and the output end of the auxiliary inverter is connected with the primary winding of the three-winding transformer; The first secondary winding of the three-winding transformer is connected with an alternating current load bus which is connected with alternating current electric equipment on a train; The direct current end of the bidirectional charger is connected with the storage battery and the direct current load bus, and the direct current load bus is connected with low-voltage direct current equipment on a train; Under the self-running working condition, the bidirectional charger is in an inversion working mode, the storage battery is in a discharging mode, the auxiliary inverter is in an uncontrolled rectifying mode, under the normal working condition, the bidirectional charger is in a rectifying mode, the storage battery is in a charging mode, and the auxiliary inverter is in an inversion mode.
2. The traction main circuit for self-propelled train according to claim 1, wherein the number of four-quadrant rectifiers is one or more, and the number of traction inverters is one or more.
3. The traction main circuit for self-propelled train operation according to any one of claims 1 or 2, wherein the overhead contact line is an AC25kV overhead contact line, or the battery is a 110V battery, or the intermediate DC bus is a DC1800V DC bus.
4. A train self-propelled control method, applied to the traction main circuit for train self-propelled according to any one of claims 1 to 3, comprising: if the train is detected to be in a self-running working condition, the bidirectional charger is controlled to be in an inversion working mode so as to convert direct current output by the storage battery into alternating current; Feeding back alternating current to the first primary winding through the second secondary winding of the three-winding transformer, and feeding back alternating current to the alternating current load bus through the first secondary winding of the three-winding transformer so as to supply power to the alternating current electric equipment through the alternating current load bus; and switching to an uncontrolled rectification mode through the auxiliary inverter so as to convert alternating current into direct current and feeding the direct current back to the intermediate direct current bus to supply power for the traction inverter through the intermediate direct current bus.
5. The train self-propelled control method of claim 4, further comprising: if the train is detected to be under the normal working condition, the auxiliary inverter is controlled to be switched into an inversion mode, so that the auxiliary inverter converts direct current on the middle direct current bus into alternating current; feeding back alternating current to the first secondary winding through the first primary winding of the three-winding transformer so as to supply power to the alternating current electric equipment through the alternating current load bus; feeding back alternating current to the second secondary winding through the first primary winding of the three-winding transformer; And controlling the bidirectional charger to be in a rectification mode so as to convert alternating current into direct current and charge the storage battery and supply power for the low-voltage direct current equipment.
6. A train self-traveling control device applied to the traction main circuit for train self-traveling according to any one of claims 1 to 3, the train self-traveling control device comprising: The first control module is used for controlling the bidirectional charger to be in an inversion working mode so as to convert direct current output by the storage battery into alternating current; The second control module is used for feeding back alternating current to the first primary winding through the second secondary winding of the three-winding transformer, feeding back alternating current to the alternating current load bus through the first secondary winding of the three-winding transformer, and supplying power to the alternating current electric equipment through the alternating current load bus; And the third control module is used for controlling the auxiliary inverter to be switched into an uncontrolled rectification mode so as to convert alternating current into direct current and feed the direct current back to the middle direct current bus to supply power for the traction inverter through the middle direct current bus.
7. The train self-propelled control device of claim 6, further comprising: the fourth control module is used for controlling the auxiliary inverter to switch to an inversion mode if the train is detected to be under a normal working condition, so that the auxiliary inverter converts direct current on the middle direct current bus into alternating current; The fifth control module is used for feeding back alternating current to the first secondary winding through the first primary winding of the three-winding transformer so as to supply power for the alternating current electric equipment through the alternating current load bus; the sixth control module is used for feeding back alternating current to the second secondary winding through the first primary winding of the three-winding transformer; And the seventh control module is used for controlling the bidirectional charger to be in a rectification mode so as to convert alternating current into direct current and charge the storage battery and supply power for the low-voltage direct current equipment.
8. A computer program product comprising computer readable instructions which, when run on an electronic device, cause the electronic device to implement the train autonomous control method of any of claims 4 to 5.
9. An electronic device comprising at least one processor and a memory coupled to the processor, wherein: the memory is used for storing a computer program; The processor is configured to execute the computer program to enable the electronic device to implement the train autonomous operation control method according to any one of claims 4 to 5.
10. A computer storage medium carrying one or more computer programs which, when executed by an electronic device, enable the electronic device to implement the train autonomous control method of any of claims 4 to 5.

Description

Traction main circuit for train self-running, and train self-running control method and device Technical Field The application relates to the technical field of rail transit, in particular to a traction main circuit for train self-running, a train self-running control method and a train self-running control device. Background When the train is stopped due to the fault of the bow net or the high-voltage system, the train needs to be stopped for standby, and if the train stays in the tunnel, passengers are easy to panic and secondary disasters are easy to cause. Therefore, the train is required to have a self-traveling function. The emergency self-propelled system of the train in the related art comprises a traction inverter, a traction motor, an auxiliary converter, a power frequency transformer, a bidirectional charger and a storage battery, wherein the traction inverter is directly driven by the 110V storage battery, but the problems of small traction, low running speed, short running distance (not more than 2 km) and the like exist, and the operation scene requirement of a large station distance of the train cannot be met. Based on the method, a mode of adding a power battery and an additional bidirectional charger in the emergency self-propelled train system is adopted in the related art, so that traction force, running speed and running distance are improved. However, due to the addition of the power battery and the additional bidirectional charger, the problems of large equipment weight, large occupied space and the like exist. Disclosure of Invention In view of the above problems, the application provides a traction main circuit for self-running of a train, a self-running control method and a self-running control device for the train, so as to achieve the purposes of improving running distance under self-running working conditions, reducing equipment weight, reducing the number of interfaces, reducing occupied space and reducing control complexity. The specific scheme is as follows: The first aspect of the application provides a traction main circuit for self-propelled operation of a train, which comprises a four-quadrant rectifier, a traction inverter, an auxiliary inverter, a three-winding transformer, a bidirectional charger, a storage battery and a traction motor, The input end of the four-quadrant rectifier is connected with the contact net through the main transformer, and the output end of the four-quadrant rectifier is connected to the middle direct current bus; the input end of the traction inverter is connected with the middle direct current bus, and the output end of the traction inverter is connected with the traction motor; The input end of the auxiliary inverter is connected with the middle direct current bus, and the output end of the auxiliary inverter is connected with the primary winding of the three-winding transformer; the first secondary winding of the three-winding transformer is connected with an alternating current load bus which is connected with alternating current electric equipment on a train; The direct current end of the bidirectional charger is connected with the storage battery and the direct current load bus, and the direct current load bus is connected with low-voltage direct current equipment on a train; Under the self-running working condition, the bidirectional charger is in an inversion working mode, the storage battery is in a discharging mode, the auxiliary inverter is in an uncontrolled rectifying mode, under the normal working condition, the bidirectional charger is in a rectifying mode, the storage battery is in a charging mode, and the auxiliary inverter is in an inversion mode. In one possible implementation, the number of four-quadrant rectifiers is one or more, and the number of traction inverters is one or more. In one possible implementation, the catenary is an AC25kV catenary, or the battery is a 110V battery, or the intermediate DC bus is a DC1800V DC bus. A second aspect of the present application provides a train self-running control method applied to the traction main circuit for train self-running in the first aspect or any implementation manner of the first aspect, the train self-running control method including: if the train is detected to be in a self-running working condition, the bidirectional charger is controlled to be in an inversion working mode so as to convert direct current of the storage battery into alternating current; Feeding back alternating current to the first primary winding through the second secondary winding of the three-winding transformer, and feeding back alternating current to the alternating current load bus through the first secondary winding of the three-winding transformer so as to supply power to the alternating current electric equipment through the alternating current load bus; and switching to an uncontrolled rectification mode through the auxiliary inverter so as to convert alternating current into direct curren