CN112172530A - High-speed maglev train braking system and method - Google Patents
High-speed maglev train braking system and method Download PDFInfo
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- CN112172530A CN112172530A CN202011090916.2A CN202011090916A CN112172530A CN 112172530 A CN112172530 A CN 112172530A CN 202011090916 A CN202011090916 A CN 202011090916A CN 112172530 A CN112172530 A CN 112172530A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/02—Dynamic electric resistor braking
- B60L7/08—Controlling the braking effect
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/28—Eddy-current braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
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- Power Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Control Of Vehicles With Linear Motors And Vehicles That Are Magnetically Levitated (AREA)
Abstract
The application provides a high-speed maglev train braking system and a high-speed maglev train braking method. And the short-circuit brake control unit sends a switch control signal to the stator switch station control unit according to the traction cut-off instruction. And the stator switch station control unit controls the vacuum contactor in the first branch of the feeder cabinet to be disconnected according to the switch control signal and controls the vacuum circuit breaker in the second branch of the short-circuit brake cabinet to be closed. And the second branch circuit and a long stator winding in the long stator linear motor form a short-circuit braking loop. When the vacuum contactor in the first branch circuit is disconnected and the vacuum circuit breaker in the second branch circuit is closed, the short-circuit brake loop and the high-speed magnetic-levitation train interact to generate braking force for braking the high-speed magnetic-levitation train. The high-speed maglev train braking system can replace an invalid eddy current braking mode to brake, and the safety and reliability of high-speed maglev train braking are improved.
Description
Technical Field
The application relates to the field of high-speed maglev trains, in particular to a braking system and a braking method of a high-speed maglev train.
Background
At present, a high-speed maglev train adopts an eddy current braking mode to perform safe braking. The eddy current braking mode mainly controls the braking force of the train by controlling the current of the vehicle-mounted eddy current braking electromagnet. Once the eddy current braking mode fails, the safety of the high-speed maglev train is threatened. Therefore, there is a need for a high-speed maglev train braking method that can replace the eddy current braking method to brake the train when the eddy current braking method fails, thereby improving the safety and reliability of train braking.
Disclosure of Invention
In order to solve the technical problems, the application provides a high-speed maglev train braking system and method, which can realize distributed control and accurate braking control of a high-speed maglev train and improve the safety and reliability of high-speed maglev train braking.
In order to achieve the above purpose, the technical solutions provided in the embodiments of the present application are as follows:
the embodiment of the application provides a high-speed maglev train braking system, the system includes: the system comprises a traction cut-off unit, a short-circuit brake control unit, a stator switching station and a long stator linear motor; the stator switch station comprises a feeder cabinet and a short-circuit brake cabinet; the long stator linear motor comprises a long stator winding;
the traction cut-off unit is used for sending a traction cut-off instruction to the short-circuit brake control unit;
the short-circuit brake control unit is used for receiving the traction cut-off instruction and sending a switch control signal to the stator switching station control unit according to the traction cut-off instruction;
the stator switching station control unit is used for controlling the vacuum contactor in the first branch circuit to be switched off and controlling the vacuum circuit breaker in the second branch circuit to be switched on according to the switching control signal when the switching control signal is received; the first branch circuit is positioned in a feeder cabinet in the stator switch station, and the second branch circuit is positioned in a short-circuit brake cabinet in the stator switch station; the first branch and the second branch are connected in parallel;
the long stator linear motor is used for forming a short-circuit braking loop by the long stator winding and the second branch circuit; when the vacuum contactor in the first branch circuit is disconnected and the vacuum circuit breaker in the second branch circuit is closed, the short-circuit brake loop and the high-speed magnetic-levitation train interact to generate braking force; the braking force is used for braking the high-speed maglev train.
Optionally, the system further includes a partition operation and control unit;
the zone operation control unit is used for sending train information to the short-circuit brake control unit;
the short-circuit brake control unit is also used for receiving the train information, calculating resistance value information of a brake resistor according to the train information and sending the resistance value information of the brake resistor to the stator switching station control unit; the brake resistor is positioned on the second branch of the short-circuit brake cabinet;
the stator switch station control unit is further configured to receive resistance information of the brake resistor, adjust the brake resistor according to the resistance information of the brake resistor, and further control the magnitude of the braking force.
Optionally, the short-circuit brake control unit is specifically configured to receive the traction cut-off instruction, and send a switch control signal to the stator switching station control unit through a PROFIBUS according to the traction cut-off instruction.
Optionally, the short-circuit brake control unit is further specifically configured to receive the train information, calculate resistance information of the brake resistor according to the train information, and send the resistance information of the brake resistor to the stator switching station control unit through a PROFIBUS.
Optionally, the partition operation and control unit is specifically configured to send train information to the short-circuit brake control unit through an RS485 bus and an open transmission network.
Optionally, the short-circuit brake control unit is further configured to receive feedback information sent by the stator switching station control unit through an open transmission network.
The embodiment of the application also provides a high-speed maglev train braking method, which is applied to a high-speed maglev train braking system, wherein the system comprises a traction cut-off unit, a short-circuit braking control unit, a stator switch station and a long stator linear motor; the stator switch station comprises a feeder cabinet and a short-circuit brake cabinet; the long stator linear motor comprises a long stator winding; the method comprises the following steps:
the traction cut-off unit sends a traction cut-off instruction to the short-circuit brake control unit;
the short-circuit brake control unit receives the traction cut-off instruction and sends a switch control signal to the stator switch station control unit according to the traction cut-off instruction;
the stator switching station control unit receives the switch control signal, controls the vacuum contactor in the first branch circuit to be switched off according to the switch control signal, and controls the vacuum circuit breaker in the second branch circuit to be switched on; the first branch circuit is positioned in a feeder cabinet in the stator switch station, and the second branch circuit is positioned in a short-circuit brake cabinet in the stator switch station; the first branch and the second branch are connected in parallel;
a long stator winding in the long stator linear motor and the second branch circuit form a short-circuit braking loop; when the vacuum contactor in the first branch circuit is disconnected and the vacuum circuit breaker in the second branch circuit is closed, the short-circuit brake loop and the high-speed magnetic-levitation train interact to generate braking force; the braking force is used for braking the high-speed maglev train.
Optionally, the method further includes:
the partition operation and control unit sends train information to the short-circuit brake control unit;
the short-circuit brake control unit receives the train information, calculates resistance value information of a brake resistor according to the train information, and sends the resistance value information of the brake resistor to the stator switch station control unit; the brake resistor is positioned on the second branch of the short-circuit brake cabinet;
and the stator switching station control unit receives the resistance information of the brake resistor, adjusts the brake resistor according to the resistance information of the brake resistor, and further controls the braking force.
Optionally, the short-circuit brake control unit receives the traction cut-off instruction, and sends a switch control signal to the stator switching station control unit according to the traction cut-off instruction, including:
and the short-circuit brake control receives the traction cut-off instruction, and sends a switch control signal to the stator switch station control unit through a PROFIBUS bus according to the traction cut-off instruction.
Optionally, the short-circuit brake control unit receives the train information, calculates resistance information of the brake resistor according to the train information, and sends the resistance information of the brake resistor to the stator switching station control unit, including:
and the short-circuit brake control unit receives the train information, calculates the resistance information of the brake resistor according to the train information, and sends the resistance information of the brake resistor to the stator switch station control unit through a PROFIBUS bus.
Optionally, the sending, by the partition operation and control unit, train information to the short-circuit brake control unit includes:
and the partition operation and control unit sends train information to the short-circuit brake control unit through an RS485 bus and an open type transmission network.
Optionally, the method further includes:
and the short-circuit brake control unit receives feedback information sent by the stator switching station control unit through an open transmission network.
According to the technical scheme, the method has the following beneficial effects:
the embodiment of the application provides a high-speed maglev train braking system, and the system includes that the traction cuts off unit, short circuit braking control unit, stator switch station and long stator linear electric motor, and the stator switch station includes feeder cabinet and short circuit brake cabinet. And the traction cut-off unit sends a traction cut-off instruction to the short-circuit brake control unit. And the short-circuit brake control unit sends a switch control signal to the stator switch station control unit according to the traction cut-off instruction. And the stator switch station control unit controls the vacuum contactor in the first branch of the feeder cabinet to be disconnected according to the switch control signal and controls the vacuum circuit breaker in the second branch of the short-circuit brake cabinet to be closed. And the second branch circuit and a long stator winding in the long stator linear motor form a short-circuit braking loop. When the vacuum contactor in the first branch circuit is disconnected and the vacuum circuit breaker in the second branch circuit is closed, the short-circuit brake loop and the high-speed magnetic-levitation train interact to generate braking force for braking the high-speed magnetic-levitation train. When the eddy current brake on the train fails, the high-speed magnetic-levitation train braking system provided by the embodiment of the application can replace an eddy current braking mode to brake, and the safety and reliability of the high-speed magnetic-levitation train braking are improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a braking system of a high-speed maglev train according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another braking system of a high-speed maglev train according to an embodiment of the present application;
fig. 3 is a schematic diagram of a connection between a stator switchyard and a long stator linear motor corresponding to fig. 2 provided by an embodiment of the present application;
fig. 4 is a signal transmission process diagram corresponding to the braking system of the high-speed maglev train in fig. 2 provided in the embodiment of the present application;
FIG. 5 is a schematic diagram of a control network within a traction zone provided by an embodiment of the present application;
fig. 6 is a flowchart of a braking method for a high-speed maglev train according to an embodiment of the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the drawings are described in detail below.
In order to facilitate understanding and explaining the technical solutions provided by the embodiments of the present application, the following first describes the background art of the embodiments of the present application.
At present, a high-speed maglev train adopts an eddy current braking mode for braking, and the eddy current braking mode is a safe braking mode of the high-speed maglev train. The eddy current braking mode is mainly used for controlling the braking force of the train by controlling the current of the vehicle-mounted eddy current braking electromagnet. The eddy current braking mode occupies more space of the high-speed maglev train, can increase the train body weight, needs to consume the electric energy of the train, and has high safety requirement and more restrictions. Therefore, the eddy current braking mode has the condition of brake failure, and once the eddy current braking mode fails, the safety of the high-speed maglev train can be threatened. The eddy current braking mode occupies more space of the high-speed maglev train and consumes electric energy of the train, so that a redundant high-speed maglev train braking mode is needed, the redundant braking mode does not occupy space of the train and consume electric energy of the train, the eddy current braking mode can be replaced to brake the train, and safety and reliability of train braking are improved.
Based on this, the embodiment of the application provides a high-speed maglev train braking system, and this system includes draws cutting unit, short circuit braking control unit, stator switch station and long stator linear electric motor, and stator switch station includes feeder cabinet and short circuit brake cabinet. And the traction cut-off unit sends a traction cut-off instruction to the short-circuit brake control unit. And the short-circuit brake control unit sends a switch control signal to the stator switch station control unit according to the traction cut-off instruction. And the stator switch station control unit controls the vacuum contactor in the first branch of the feeder cabinet to be disconnected according to the switch control signal and controls the vacuum circuit breaker in the second branch of the short-circuit brake cabinet to be closed. And the second branch circuit and a long stator winding in the long stator linear motor form a short-circuit braking loop. When the vacuum contactor in the first branch circuit is disconnected and the vacuum circuit breaker in the second branch circuit is closed, the short-circuit brake loop and the high-speed magnetic-levitation train interact to generate braking force for braking the high-speed magnetic-levitation train.
In order to facilitate understanding of the high-speed maglev train braking system provided in the embodiment of the present application, the structure of the high-speed maglev train braking system according to the embodiment of the present application is described below with reference to fig. 1, where fig. 1 is a schematic structural diagram of a high-speed maglev train braking system provided in the embodiment of the present application, and the high-speed maglev train braking system includes:
the system comprises a traction cut-off unit 1, a short-circuit brake control unit 2, a stator switching station control unit 3, a stator switching station 4 and a long stator linear motor 5. The stator switch station 4 comprises a feeder cabinet and a short-circuit brake cabinet, and the long stator linear motor 5 comprises a long stator winding.
Specifically, when the high-speed maglev train brakes, the traction cut-off unit 1 sends a traction cut-off instruction to the short-circuit brake control unit 2. The traction cutting-off unit 1 belongs to an operation control system of a high-speed magnetic-levitation train.
After receiving the traction cut-off instruction, the short-circuit brake control unit 2 sends a switch control signal to the stator switching station control unit 3 according to the traction cut-off instruction. In one embodiment, the shorting brake control unit 2 may send a switch control signal to the stator switchyard control unit 3 over the PROFIBUS bus.
And after receiving the switch control signal, the stator switch station control unit 3 controls the vacuum contactor in the first branch circuit to be switched off and controls the vacuum circuit breaker in the second branch circuit to be switched on according to the switch control signal. The first branch is located in a feeder cabinet in the stator switch station 4, the second branch is located in a short-circuit brake cabinet in the stator switch station 4, and the first branch is connected with the second branch in parallel. In one embodiment, the vacuum contactor in the first branch and the vacuum interrupter in the second branch are connected together by a safety interlock switch.
And a short-circuit braking loop is formed by a long stator winding and a second branch circuit in the long stator linear motor 5. When the vacuum contactor in the first branch is disconnected and the vacuum circuit breaker in the second branch is closed, the short-circuit brake loop and the high-speed magnetic-levitation train interact to generate braking force, and the braking force is used for braking the high-speed magnetic-levitation train. It can be understood that when the vacuum contactor is opened, the power supply circuit for the normal running of the train is disconnected. When the vacuum circuit breaker is closed, the short-circuit brake loop is closed, and the high-speed magnetic suspension train is equivalent to a motor rotor. When the train passes through the long stator linear motor 5, the rotor of the motor moves relative to the rotor, a magnetic field which obstructs braking of the high-speed magnetic suspension train can be generated, induced electromotive force is generated in a long stator winding, and due to the fact that a short-circuit braking loop is closed, induced current can be generated in the closed loop to form braking force, and short-circuit braking is achieved.
Through the high-speed maglev train braking system provided by the application, the train and the long stator winding move mutually to generate braking force, and the safe braking mode of the train can be replaced under the condition that the original safe braking mode of the train fails, so that the safe reliability of train braking is improved. In addition, the high-speed maglev train braking system provided by the embodiment of the application does not need electric energy in the process of braking the train, and can save energy.
Furthermore, on the basis that the short-circuit brake circuit can generate the brake force, the purpose of accurately controlling the brake force needs to be achieved. Based on this, on the basis of the high-speed maglev train braking system shown in fig. 1, a partitioned operation and control unit 6 is added, as shown in fig. 2, and fig. 2 is a schematic structural diagram of another high-speed maglev train braking system provided in the embodiment of the present application.
The partition operation and control unit 6 belongs to an operation control system of a high-speed magnetic-levitation train and is connected with the short-circuit brake control unit 2. The zone operation control unit 6 is used for sending train information to the short-circuit brake control unit 2. The train information includes information such as the position, speed, braking curve, etc. of the train. In one embodiment, the partition operation and control unit 6 is hung on a network node of the open transmission network through an RS485 bus, and communicates with the short-circuit brake control unit 2, for example, sends train information to the short-circuit brake control unit 2.
In the system shown in fig. 2, the short-circuit brake control unit 2 is further configured to receive train information sent by the partition operation and control unit 6, calculate resistance value information of the brake resistors according to the train information, and send the resistance value information of the brake resistors to the sub-switch station control unit 3. The brake resistor is located in a second branch of the short-circuit brake cabinet. Calculating resistance information of the brake resistor according to the train information includes: the braking acceleration of the train is obtained through the position and the speed of the train, the braking force required by the braking of the train is obtained according to the acceleration of the train, the braking current is calculated according to the braking force, and the resistance value of the braking resistor is calculated. The braking force is in direct proportion to the braking current, and the control of the braking current can be realized by adjusting the size of the braking resistor, so that the braking force can be realized by adjusting the braking resistor. In one embodiment, the short-circuit brake control unit 2 sends the resistance information of the brake resistor to the sub-switchyard control unit 3 through the PROFIBUS bus.
In one embodiment, the short-circuit brake control unit 2 may also receive feedback information sent by the stator switchyard control unit 3 through an open transmission network. The feedback information includes monitoring and diagnostic information, for example, whether the state of the vacuum contactor in the first branch is open or not is monitored, whether the state of the vacuum circuit breaker in the second branch is closed or not is monitored, resistance information of the brake resistor is detected, and the monitoring result is fed back to the short-circuit brake control unit 2. The short-circuit brake control unit 2 can perform corresponding operations according to the feedback information.
In the system shown in fig. 2, the stator switchyard control unit 3 is further configured to receive the information of the resistance value of the brake resistor in the second branch sent by the short-circuit brake control unit 2. After receiving the resistance information of the brake resistor, the stator switching station 4 adjusts the brake resistor according to the resistance information of the brake resistor, thereby controlling the magnitude of the braking force.
Through the high-speed maglev train braking system that this application embodiment provided, not only can generate braking force and be used for high-speed maglev train to brake, still can be through the size of control braking resistance value, the size of the braking force of accurate control high-speed maglev train to realize high-speed maglev train's accurate braking control.
For better understanding and explanation of the structure of the high speed maglev train braking system shown in fig. 2, further details are provided in conjunction with fig. 3 and 4. Fig. 3 is a schematic connection diagram of a stator switch station and a long stator linear motor corresponding to fig. 2 provided in an embodiment of the present application, and fig. 4 is a signal transmission process diagram of a high-speed magnetic-levitation train braking system corresponding to fig. 2 provided in an embodiment of the present application.
As shown in fig. 3, the stator switching station includes an incoming and outgoing line cabinet 7, a feeder cabinet 8, a short-circuit brake cabinet 9 and a star connection cabinet 10. The circuit in the feeder cabinet 8 is a first branch circuit, and the circuit in the short-circuit brake cabinet 9 is a second branch circuit. The first branch circuit comprises a vacuum contactor K1, the second branch circuit comprises a vacuum circuit breaker K2 and a brake resistor 11, and the brake resistor 11 is an adjustable resistor. The vacuum contactor K1 and the vacuum interrupter K2 are controlled by the safety interlock switch 12. The long stator linear motor 5 includes a long stator winding 13 and a long stator core 14. A plurality of stator switchgears 4 are contained in one traction zone, and the plurality of stator switchgears 4 are connected together by an incoming and outgoing line cabinet 7.
As shown in fig. 4, when the high-speed maglev train brakes, the traction cut-off unit 1 sends a traction cut-off command to the short-circuit brake control unit 2. Meanwhile, the partition operation and control unit 6 is connected to the open type transmission network node through an RS485 bus in a hanging mode, and sends train information such as the position, the speed and the braking curve of the train to the short-circuit braking control unit 2.
After the short-circuit brake control unit 2 receives the traction cut-off instruction and the train information, on one hand, according to the traction cut-off instruction, a switch control signal is sent to the stator switch station control unit 3 through the PROFIBUS. On the other hand, the resistance value information of the brake resistor 11 is calculated from the train information, and the resistance value information of the brake resistor 11 is transmitted to the sub-switchyard control unit 3 through the PROFIBUS bus.
After the stator switching station control unit 3 receives the switch control signal and the resistance value information of the brake resistor 11, on one hand, the stator switching station control unit 3 controls the vacuum contactor K1 of the first branch in the stator switching station 4 to be switched off and controls the vacuum circuit breaker K2 in the second branch to be switched on according to the switch control signal. When the vacuum contactor K1 of the first branch is opened and the vacuum circuit breaker K2 of the second branch is closed, the second branch and the long stator winding 13 form a short-circuit braking loop, and the braking resistor 11 is in the short-circuit braking loop. The short circuit brake loop interacts with the high-speed maglev train to generate braking force, and the braking force is used for braking the high-speed maglev train. On the other hand, the stator switching station control unit 3 adjusts the size of the brake resistor 11 according to the resistance information of the brake resistor 11, thereby controlling the size of the braking force.
Through the high-speed maglev train braking system that this application embodiment provided, when the eddy current braking on the train became invalid, the high-speed maglev train braking system that this application embodiment provided can replace the eddy current braking mode to brake to can control the size of braking force through the size of adjusting the braking resistance value, improved the fail safe nature of high-speed maglev train braking, realized the accurate control of high-speed maglev train braking.
It should be noted that the high-speed maglev train braking system provided by the present application is provided in each traction sub-area, in which case the high-speed maglev train braking systems of each sub-area may be connected together by a control network. Fig. 5 is a schematic diagram of a control network provided in an embodiment of the present application, and fig. 5 shows a communication structure in one traction sub-area, where one traction sub-area includes two traction substations.
The distance of the brake loop of the high-speed maglev train brake system is equal to the length of the long stator linear motor, for example, the distance of one traction subarea is 20 km-50 km, and the brake loop of the high-speed maglev train brake system can be 800 m-1200 m. The high-speed maglev train braking systems of all the subareas communicate through a control network to form ground distributed real-time control. When part of the braking systems are damaged, the braking systems of other subareas can still work, the braking performance of the high-speed maglev train is not influenced, and the safety and reliability of the high-speed maglev train braking are improved. It should be noted that the high-speed maglev train braking system provided by the embodiment of the application is arranged in each traction subarea, so that the ground braking of the whole track can be realized, the train braking mode is increased, and the safety and reliability of train braking are improved.
In one embodiment, the short brake control units and the stator switchyard control units within one traction zone are connected together by an open transmission network 15, and the short brake control units communicate between different traction zones via the open transmission network 15. Optionally, the open transmission network adopts an optical fiber medium and a double-ring network, so that the transmission distance is long and the reliability is high.
In one embodiment, the short-circuit brake control unit in each traction substation adopts a master-slave redundancy structure. That is to say, there are two short circuit brake control units in every traction substation, and when one of them short circuit brake control unit broke down, another short circuit brake control unit can come into operation immediately, began work, improves the fail safe nature of system.
It can be understood that the traction cut-off unit, the partition operation control unit, the short-circuit brake control unit, the stator switch station and the long stator linear motor in the high-speed maglev train brake system provided by the embodiment of the application are not arranged on the high-speed maglev train, so that the whole high-speed maglev train brake control system does not occupy the space of the train and can not increase the weight of the train.
In addition, the embodiment of the application also provides a braking method of the high-speed maglev train. Referring to fig. 6, fig. 6 is a flowchart of a high-speed maglev train braking method provided in an embodiment of the present application, where the flow of the method is applied to the high-speed maglev train braking system shown in fig. 1, the system includes a traction cut-off unit, a short-circuit braking control unit, a stator switching station, and a long-stator linear motor, the stator switching station includes a feeder cabinet and a short-circuit braking cabinet, the long-stator linear motor includes a long-stator winding, and the method may specifically include S601-S604:
s601: and the traction cut-off unit sends a traction cut-off instruction to the short-circuit brake control unit.
S602: and the short-circuit brake control unit receives the traction cut-off instruction and sends a switch control signal to the stator switch station control unit according to the traction cut-off instruction.
S603: the stator switch station control unit receives the switch control signal, controls the vacuum contactor in the first branch to be disconnected according to the switch control signal, controls the vacuum circuit breaker in the second branch to be closed, the first branch is located in a feeder cabinet in the stator switch station, the second branch is located in a short-circuit brake cabinet in the stator switch station, and the first branch and the second branch are connected in parallel.
S604: and when the vacuum contactor in the first branch circuit is disconnected and the vacuum circuit breaker in the second branch circuit is closed, the short-circuit braking loop and the high-speed magnetic-levitation train interact to generate braking force, and the braking force is used for braking the high-speed magnetic-levitation train.
Optionally, in some implementations of this embodiment, the method further includes:
the partition operation and control unit sends train information to the short-circuit brake control unit;
the short-circuit brake control unit receives the train information, calculates resistance value information of a brake resistor according to the train information, and sends the resistance value information of the brake resistor to the stator switch station control unit; the brake resistor is positioned on the second branch of the short-circuit brake cabinet;
and the stator switching station control unit receives the resistance information of the brake resistor, adjusts the brake resistor according to the resistance information of the brake resistor, and further controls the braking force.
Optionally, in some embodiments of this embodiment, the receiving, by the short-circuit brake control unit, the traction cut-off instruction, and sending a switch control signal to the stator switching station control unit according to the traction cut-off instruction includes:
and the short-circuit brake control receives the traction cut-off instruction, and sends a switch control signal to the stator switch station control unit through a PROFIBUS bus according to the traction cut-off instruction.
Optionally, in some embodiments of this embodiment, the receiving, by the short-circuit brake control unit, the train information, calculating resistance information of a brake resistor according to the train information, and sending the resistance information of the brake resistor to the stator switching station control unit includes:
and the short-circuit brake control unit receives the train information, calculates the resistance information of the brake resistor according to the train information, and sends the resistance information of the brake resistor to the stator switch station control unit through a PROFIBUS bus.
Optionally, in some embodiments of this embodiment, the sending, by the partition operation and control unit, train information to the short-circuit brake control unit includes:
and the partition operation and control unit sends train information to the short-circuit brake control unit through an RS485 bus and an open type transmission network.
Optionally, in some implementations of this embodiment, the method further includes:
and the short-circuit brake control unit receives feedback information sent by the stator switching station control unit through an open transmission network.
According to the high-speed maglev train braking method provided by the embodiment of the application, the method is applied to a high-speed maglev train braking system, and the traction cut-off unit sends the traction cut-off instruction to the short-circuit braking control unit. And the short-circuit brake control unit sends a switch control signal to the stator switch station control unit according to the traction cut-off instruction. And the stator switch station control unit controls the vacuum contactor in the first branch of the feeder cabinet to be disconnected according to the switch control signal and controls the vacuum circuit breaker in the second branch of the short-circuit brake cabinet to be closed. And the second branch circuit and a long stator winding in the long stator linear motor form a short-circuit braking loop. When the vacuum contactor in the first branch circuit is disconnected and the vacuum circuit breaker in the second branch circuit is closed, the short-circuit brake loop and the high-speed magnetic-levitation train interact to generate braking force for braking the high-speed magnetic-levitation train. When the eddy current brake on the train fails, the high-speed magnetic-levitation train braking system provided by the embodiment of the application can replace an eddy current braking mode to brake, and the safety and reliability of the high-speed magnetic-levitation train braking are improved.
It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. The method disclosed by the embodiment corresponds to the system disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the system part for description.
It should also be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (12)
1. A high speed maglev train braking system, the system comprising: the system comprises a traction cut-off unit, a short-circuit brake control unit, a stator switching station and a long stator linear motor; the stator switch station comprises a feeder cabinet and a short-circuit brake cabinet; the long stator linear motor comprises a long stator winding;
the traction cut-off unit is used for sending a traction cut-off instruction to the short-circuit brake control unit;
the short-circuit brake control unit is used for receiving the traction cut-off instruction and sending a switch control signal to the stator switching station control unit according to the traction cut-off instruction;
the stator switching station control unit is used for controlling the vacuum contactor in the first branch circuit to be switched off and controlling the vacuum circuit breaker in the second branch circuit to be switched on according to the switching control signal when the switching control signal is received; the first branch circuit is positioned in a feeder cabinet in the stator switch station, and the second branch circuit is positioned in a short-circuit brake cabinet in the stator switch station; the first branch and the second branch are connected in parallel;
the long stator linear motor is used for forming a short-circuit braking loop by the long stator winding and the second branch circuit; when the vacuum contactor in the first branch circuit is disconnected and the vacuum circuit breaker in the second branch circuit is closed, the short-circuit brake loop and the high-speed magnetic-levitation train interact to generate braking force; the braking force is used for braking the high-speed maglev train.
2. The system of claim 1, further comprising a partition operation control unit;
the zone operation control unit is used for sending train information to the short-circuit brake control unit;
the short-circuit brake control unit is also used for receiving the train information, calculating resistance value information of a brake resistor according to the train information and sending the resistance value information of the brake resistor to the stator switching station control unit; the brake resistor is positioned on the second branch of the short-circuit brake cabinet;
the stator switch station control unit is further configured to receive resistance information of the brake resistor, adjust the brake resistor according to the resistance information of the brake resistor, and further control the magnitude of the braking force.
3. The system according to claim 1, wherein the short-circuit brake control unit is specifically configured to receive the traction cut-off instruction, and send a switch control signal to the stator switchyard control unit through a PROFIBUS bus according to the traction cut-off instruction.
4. The system according to claim 2, wherein the short-circuit brake control unit is further configured to receive the train information, calculate resistance information of a brake resistor according to the train information, and send the resistance information of the brake resistor to the stator switchyard control unit through a PROFIBUS.
5. The system of claim 2, wherein the zone operation control unit is specifically configured to send train information to the short-circuit brake control unit through an RS485 bus and an open transmission network.
6. The system of claim 1, wherein the short brake control unit is further configured to receive feedback information sent by the stator switchyard control unit via an open transmission network.
7. A high-speed maglev train braking method is characterized in that the method is applied to a high-speed maglev train braking system, and the system comprises a traction cut-off unit, a short-circuit braking control unit, a stator switch station and a long stator linear motor; the stator switch station comprises a feeder cabinet and a short-circuit brake cabinet; the long stator linear motor comprises a long stator winding; the method comprises the following steps:
the traction cut-off unit sends a traction cut-off instruction to the short-circuit brake control unit;
the short-circuit brake control unit receives the traction cut-off instruction and sends a switch control signal to the stator switch station control unit according to the traction cut-off instruction;
the stator switching station control unit receives the switch control signal, controls the vacuum contactor in the first branch circuit to be switched off according to the switch control signal, and controls the vacuum circuit breaker in the second branch circuit to be switched on; the first branch circuit is positioned in a feeder cabinet in the stator switch station, and the second branch circuit is positioned in a short-circuit brake cabinet in the stator switch station; the first branch and the second branch are connected in parallel;
a long stator winding in the long stator linear motor and the second branch circuit form a short-circuit braking loop; when the vacuum contactor in the first branch circuit is disconnected and the vacuum circuit breaker in the second branch circuit is closed, the short-circuit brake loop and the high-speed magnetic-levitation train interact to generate braking force; the braking force is used for braking the high-speed maglev train.
8. The method of claim 7, further comprising:
the partition operation and control unit sends train information to the short-circuit brake control unit;
the short-circuit brake control unit receives the train information, calculates resistance value information of a brake resistor according to the train information, and sends the resistance value information of the brake resistor to the stator switch station control unit; the brake resistor is positioned on the second branch of the short-circuit brake cabinet;
and the stator switching station control unit receives the resistance information of the brake resistor, adjusts the brake resistor according to the resistance information of the brake resistor, and further controls the braking force.
9. The method of claim 7, wherein the short-circuit brake control unit receives the traction cut-off command and sends a switch control signal to a stator switchyard control unit according to the traction cut-off command, and the method comprises:
and the short-circuit brake control receives the traction cut-off instruction, and sends a switch control signal to the stator switch station control unit through a PROFIBUS bus according to the traction cut-off instruction.
10. The method of claim 8, wherein the short circuit brake control unit receiving the train information, calculating resistance information of a brake resistor according to the train information, and sending the resistance information of the brake resistor to the stator switchyard control unit comprises:
and the short-circuit brake control unit receives the train information, calculates the resistance information of the brake resistor according to the train information, and sends the resistance information of the brake resistor to the stator switch station control unit through a PROFIBUS bus.
11. The method of claim 8, wherein the zone operational control unit sending train information to the short-circuit brake control unit comprises:
and the partition operation and control unit sends train information to the short-circuit brake control unit through an RS485 bus and an open type transmission network.
12. The method of claim 7, further comprising:
and the short-circuit brake control unit receives feedback information sent by the stator switching station control unit through an open transmission network.
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| CN202011090916.2A CN112172530B (en) | 2020-10-13 | 2020-10-13 | High-speed maglev train braking system and method |
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