A maglev train ground device and ground traction power supply system and method thereof

Abstract

The present application discloses a ground device of a maglev train and its ground traction power supply system and method, which are applied in the field of rail transit technology, and include: an operation control system; a traction control system; a first traction device arranged in the main line area, which is used to receive the alternating current provided by the traction control system and perform current conversion, traction of the maglev train, and power supply to the maglev train through the induction of the generator coil; a current conversion device arranged in the main line area and the maintenance area, which is used to: perform current conversion control in a first mode when receiving a first instruction sent by the operation control system, so as to output alternating current to the stator winding, so as to power the maglev train; perform current conversion control in a second mode when receiving a second instruction sent by the operation control system, so as to output alternating current to the stator winding for traction of the maglev train. By applying the scheme of the present application, the reliability of the ground traction power supply system of the maglev train can be improved, and the third rail power supply can be cancelled in the whole area.

Description

Technical Field

[0001] The present invention relates to the field of rail transportation technology, and in particular to a ground device of a maglev train and a ground traction power supply system and method thereof. Background Art

[0002] At present, the more mature high-speed maglev trains are conventional electromagnetic maglev trains and superconducting electric maglev trains. It is called "maglev" because when running at high speed, the vehicle has no contact with the track, and the electromagnetic thrust is used as traction to drive the train. Since the train has no contact with the track, how to solve the problem of train power consumption has become a research object. At present, high-speed maglev trains use two power supply methods, direct power supply by the third rail and linear induction power supply, depending on the region.

[0003] For train traction, currently, medium- and high-speed traction modules are arranged on the entire line of mainline operation, and low-speed traction modules are arranged in maintenance areas, turnout junctions and other areas. The partitioned operation control system will control the medium- and high-speed traction modules according to operational needs to achieve normal vehicle operation. The operation control system in special areas such as maintenance areas and turnouts controls the low-speed traction modules to achieve vehicle traction during maintenance, debugging, and outbound delivery. In other words, traction in different areas is achieved through medium- and high-speed traction modules and low-speed traction modules, and there is no direct correlation between the two, either physically or in control.

[0004] There are two ways to power the train. The first way is to set up a third rail on the ground in low-speed areas and some uphill medium- and high-speed areas. The train uses a current-collecting shoe. When the train runs at a low speed or stops, the current-collecting shoe falls down to connect the third rail. A third-rail power supply rectifier module is set on the ground. The third-rail power supply rectifier module provides DC power to the train through the third rail to meet the power needs of the train's equipment and personnel. The second way is to use the harmonic magnetic flux generated by the long stator slot effect on the ground, and the relative movement of the generator coil in the train to generate an induced voltage to achieve non-contact power generation. Since the size of the induced voltage is closely related to the speed, the premise of reliable power supply is that the train must run at high speed. That is, when the train is running at a low speed or stopped, it still needs to be powered by the first method.

[0005] From the above description, it can be seen that the current ground traction power supply system of the maglev train is completely independent of the medium and high speed parts and the low speed parts, and the third rail power supply part is also completely independent of the traction part. Therefore, when certain faults occur in the train, such as the failure of the medium and high speed traction module, the train needs to be towed to a fixed position by a trailer to handle the fault, which affects the operation. In addition, when the third rail is used for power supply, the power supply is independent and not controlled by the operation control system, so it is difficult to grasp the timing of power supply. Therefore, the current solution is to set the third rail to always have power, which will cause additional line losses and pose safety hazards.

[0006] In summary, how to effectively improve the reliability of the ground traction power supply system of the maglev train and avoid additional line loss and potential safety hazards when the third rail is powered is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0007] The purpose of the present invention is to provide a maglev train ground device and its ground traction power supply system and method, so as to effectively improve the reliability of the ground traction power supply system of the maglev train, avoid additional line loss when the third rail is used for power supply, and avoid potential safety hazards.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] A ground traction power supply system for a maglev train, comprising:

[0010] Operation control system;

[0011] A traction control system, used for providing AC power to the first traction device and the converter device under the control of the operation control system;

[0012] The first traction device arranged in the main line area is used to receive the alternating current provided by the traction control system and perform current conversion, and output the alternating current to the stator winding to pull the maglev train, and the maglev train is powered by induction of the generator coil;

[0013] The inverter device arranged in the main line area and the maintenance area is used to: when receiving the first instruction sent by the operation control system, receive the alternating current provided by the traction control system and perform the inverter control in the first mode to output alternating current to the stator winding, so that the maglev train is powered by induction of the generating coil; when receiving the second instruction sent by the operation control system, receive the alternating current provided by the traction control system and perform the inverter control in the second mode to output alternating current to the stator winding for traction of the maglev train.

[0014] Preferably, it also includes: a second traction device arranged in the maintenance area, which is used to receive the alternating current provided by the traction control system and perform current conversion, and output the alternating current to the stator winding to pull the maglev train, and enable the maglev train to be powered by induction of the generating coil.

[0015] Preferably, when the maglev train is towed by the second traction device, the second traction device is specifically used to: output alternating current to the stator winding so that the maglev train runs within a speed range of [a, b];

[0016] When the maglev train is pulled by the converter, the converter is specifically used to: output AC power to the stator winding so that the maglev train runs within a speed range of (0, c];

[0017] Wherein, a is the set high-speed operation lower limit value, b is the set high-speed operation upper limit value, c is the set low-speed operation upper limit value, and c<a.

[0018] Preferably, when the maglev train is towed by the first traction device, the first traction device is specifically used to: output alternating current to the stator winding so that the maglev train runs within a speed range of [a, b];

[0019] When the maglev train is pulled by the converter, the converter is specifically used to: output AC power to the stator winding so that the maglev train runs within a speed range of (0, c];

[0020] Wherein, a is the set high-speed operation lower limit value, b is the set high-speed operation upper limit value, c is the set low-speed operation upper limit value, and c<a.

[0021] Preferably, when the maglev train is powered by the converter, the converter is specifically used for:

[0022] When receiving the first instruction sent by the operation control system, the alternating current provided by the traction control system is received and current conversion control in the first mode is performed, and alternating current is output to the stator winding by simulating high-frequency harmonics, so that the maglev train is powered by induction of the generating coil.

[0023] Preferably, the operation control system is also used for:

[0024] When the maglev train is located in the mainline area, after sending the first instruction or the second instruction to the converter, prompt information of the failure of the first traction device is output.

[0025] Preferably, the converter device is a converter device that converts the AC power provided by the traction control system into DC power and then converts it into AC power for output, and each switching device in the converter device is a high-frequency switching device.

[0026] Preferably, each switching device in the converter is an IGBT, or an IGCT, or a SIC.

[0027] A ground traction power supply method for a maglev train, comprising:

[0028] The traction control system provides AC power to the first traction device and the converter device under the control of the operation control system;

[0029] The first traction device arranged in the main line area receives the AC power provided by the traction control system and performs current conversion, and outputs the AC power to the stator winding to pull the maglev train, and the maglev train is powered by induction of the generator coil;

[0030] The converter arranged in the main line area and the maintenance area receives the AC power provided by the traction control system and performs converter control in the first mode when receiving the first instruction sent by the operation control system, so as to output AC power to the stator winding, so that the maglev train is powered by induction of the generator coil;

[0031] When receiving the second instruction sent by the operation control system, the converter receives the AC power provided by the traction control system and performs converter control in the second mode to output AC power to the stator winding for traction of the maglev train.

[0032] Preferably, it also includes:

[0033] The second traction device arranged in the maintenance area receives the AC power provided by the traction control system and converts the AC power, and outputs the AC power to the stator winding to pull the maglev train, and the maglev train is powered by induction of the generator coil.

[0034] Preferably, the first traction device outputs alternating current to the stator winding to pull the maglev train, comprising:

[0035] The first traction device outputs alternating current to the stator winding, so that the maglev train runs within a speed range of [a, b];

[0036] The converter outputs alternating current to the stator winding to pull the maglev train, including:

[0037] The converter outputs alternating current to the stator winding, so that the maglev train runs within a speed range of (0, c];

[0038] Wherein, a is the set high-speed operation lower limit value, b is the set high-speed operation upper limit value, c is the set low-speed operation upper limit value, and c<a.

[0039] Preferably, when receiving the first instruction sent by the operation control system, the current conversion device receives the alternating current provided by the traction control system and performs current conversion control in the first mode to output alternating current to the stator winding, so that the maglev train is powered by induction of the generating coil, including:

[0040] When receiving the first instruction sent by the operation control system, the converter receives the alternating current provided by the traction control system and performs converter control in the first mode, and outputs alternating current to the stator winding by simulating high-frequency harmonics, so that the maglev train is powered by induction of the generating coil.

[0041] Preferably, it also includes:

[0042] When the maglev train is located in the mainline area, the operation control system outputs prompt information of the failure of the first traction device after sending the first instruction or the second instruction to the converter.

[0043] Preferably, the converter device is a converter device that converts the AC power provided by the traction control system into DC power and then converts it into AC power for output, and each switching device in the converter device is a high-frequency switching device.

[0044] A ground device for a maglev train comprises the ground traction power supply system for the maglev train as described in any one of the above items.

[0045] By applying the technical solution provided by the embodiment of the present invention, when the operation control system, the traction control system, and the first traction device operate normally, in the main line area, through the AC power provided by the traction control system, the first traction device can receive the AC power provided by the traction control system and perform current conversion, and output AC power to the stator winding to traction the maglev train. In addition, when the maglev train is running in the main line area, it can run at medium and high speeds, so the first traction device can also power the maglev train through the induction of the generator coil while traction of the maglev train. If the first traction device fails, since the current conversion device is provided in the solution of the present application, power supply or traction can be performed through the current conversion device. Specifically, when receiving the first instruction sent by the operation control system, the current conversion device will receive the AC power provided by the traction control system and perform current conversion control in the first mode. Through the current conversion control at this time, after the AC power is output to the stator winding, the maglev train can be powered by the induction of the generator coil. Therefore, it can be seen that in the solution of the present application, there is no need to arrange any third rail in the main line area, and the train can be powered through the first traction device or the current conversion device. If the second instruction sent by the operation control system is received, the converter device will receive the alternating current provided by the traction control system and perform converter control in the second mode. Through the converter control at this time, the maglev train can be towed after the alternating current is output to the stator winding. Therefore, when the maglev train fails in the main line area, the solution of the present application does not need to use a trailer, but can use the converter device to tow the maglev train to the designated location to deal with the fault. In addition, the converter device of the present application is also arranged in the maintenance area, so that the maglev train can be towed or powered by the converter device in the maintenance area. Therefore, the design of the third rail can also be cancelled in the maintenance area. In other words, the solution of the present application can cancel the design of the third rail in the entire area.

[0046] To sum up, the solution of the present application can effectively improve the reliability of the ground traction power supply system of the maglev train by setting up a current converter, and since the third rail power supply design is cancelled in the entire area, additional line losses and safety hazards caused by the third rail power supply can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1It is a structural schematic diagram of a ground traction power supply system of a maglev train in the present invention;

[0049] Figure 2 It is a structural schematic diagram of a ground traction power supply system of a maglev train in a mainline area in a specific implementation manner of the present invention;

[0050] Figure 3 It is a structural schematic diagram of a ground traction power supply system of a maglev train in an auxiliary parking area in a specific implementation manner of the present invention;

[0051] Figure 4 The present invention is a flowchart of the implementation of a ground traction power supply method for a maglev train. DETAILED DESCRIPTION

[0052] The core of the present invention is to provide a ground traction power supply system for a maglev train, which can effectively improve the reliability of the ground traction power supply system of the maglev train. Moreover, since the third-rail power supply design is cancelled in the entire area, additional line loss during the third-rail power supply and potential safety hazards can be avoided.

[0053] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0054] Please refer to Figure 1 , Figure 1 The present invention is a schematic diagram of the structure of a ground traction power supply system of a maglev train, and the ground traction power supply system of the maglev train may include:

[0055] Operation control system 10;

[0056] The traction control system 20 is used to provide AC power to the first traction device 30 and the converter 40 under the control of the operation control system 10;

[0057] The first traction device 30 arranged in the main line area is used to receive the AC power provided by the traction control system 20 and perform current conversion, and output the AC power to the stator winding to pull the maglev train, and the maglev train is powered by induction of the generator coil;

[0058] The inverter device 40 arranged in the main line area and the maintenance area is used to: when receiving the first instruction sent by the operation control system 10, receive the alternating current provided by the traction control system 20 and perform the inverter control in the first mode to output alternating current to the stator winding, so that the maglev train is powered by the induction of the generator coil; when receiving the second instruction sent by the operation control system 10, receive the alternating current provided by the traction control system 20 and perform the inverter control in the second mode to output alternating current to the stator winding for traction of the maglev train.

[0059] Specifically, the operation control system 10 can output instructions to control the ground traction power supply system of the maglev train. It can be understood that, since the maglev train operation line is relatively long in actual applications, a distributed maglev train ground traction power supply system can be used, which is usually divided into different ground partitions, and each partition can be set with one or more groups of maglev train ground traction power supply systems as needed.

[0060] The first traction device 30 described in the present application is arranged in the main line area. Accordingly, the traction control system 20 that provides AC power to the first traction device 30 and the converter 40, and the operation control system 10 connected to the traction control system 20 can be arranged in the main line area.

[0061] The inverter device 40 of the present application is arranged in both the main line area and the maintenance area. Therefore, for the inverter device 40 arranged in the maintenance area, the traction control system 20 that provides AC power to the inverter device 40 in the maintenance area, and the operation control system 10 connected to the traction control system 20 can be arranged in the maintenance area.

[0062] In other words, similar to the inverter 40, the traction control system 20 and the operation control system 10 are arranged in the mainline area and the maintenance area.

[0063] Under the control of the operation control system 10 , the traction control system 20 can provide alternating current to the first traction device 30 and the converter 40 , and three-phase alternating current is usually used.

[0064] The mainline area refers to the area where the maglev train runs at high speed. The staff can pre-set which areas are the mainline areas on the maglev train route. Of course, they can also be adjusted according to actual needs. For example, in actual applications, the running speed curve of the maglev train in the entire line can be set according to the operation requirements of the maglev train, and then the mainline area can be determined.

[0065] When the maglev train is running in the mainline area, if the first traction device 30 has no faults, there is no need to use the converter 40, because at this time, the traction and power supply of the maglev train can be achieved simultaneously through the first traction device 30.

[0066] Specifically, the first traction device 30 can also be called a medium- and high-speed traction device. In actual applications, it is usually an AC-DC-AC structure, that is, the first traction device 30 can rectify the AC power provided by the traction control system 20 into DC power, and can perform filtering and voltage stabilization in the DC link, and finally invert it into the required AC power and output it to the stator winding.

[0067] exist Figure 2 In the implementation mode, the stator switch station can be used to output AC power to the stator winding to pull the train. At the same time, the high-frequency harmonics generated, that is, the harmonic magnetic flux generated by the long stator slot effect on the ground, and the relative motion with the generator coil in the maglev train, thereby generating an induced voltage on the generator coil, thus realizing non-contact power generation, that is, the maglev train can be powered by the induction of the generator coil. Figure 2 In practical applications, multiple sets of generating coils can be installed on a maglev train.

[0068] It should be noted that the traction of the maglev train can be achieved through the first traction device 30, and at the same time, the contactless power supply of the maglev train can be achieved through the electromagnetic induction of harmonics. When the maglev train is powered by the first traction device 30, the train is usually required to have a relatively high running speed, because the induced voltage of the generator coil is closely related to the train speed. Therefore, when the first traction device 30 is fault-free, the maglev train will run at medium and high speeds in the mainline area.

[0069] The first traction device 30 is provided with a controller and a driving circuit, so as to realize the timing control of each switch tube in the first traction device 30, so as to realize the current conversion function of the first traction device 30, that is, the controller in the first traction device 30 can control the on and off of each switch tube in the first traction device 30, so that the first traction device 30 can output the required three-phase voltage. Of course, the specific driving rules can be set according to the actual situation, so that the first traction device 30 can output the alternating current of the specified frequency, amplitude and phase to the stator winding, so as to realize the medium and high speed traction and power supply of the maglev train.

[0070] The converter 40 can also be set to an AC-DC-AC structure, and the converter 40 can be used to realize low-speed traction or power supply of the train. The converter 40 is also provided with a controller and a drive circuit to realize the timing control of each switch tube in the converter 40.

[0071] Specifically, for example, if the first traction device 30 fails and the train stops temporarily in the mainline area, the operation control system 10 can send a first instruction to the converter 40, and the converter 40 can receive the AC power provided by the traction control system 20 and perform converter control in the first mode.

[0072] In the first mode, the specific current conversion control method of the converter 40 can be set according to actual needs, but it is necessary to output AC power to the stator winding so that the maglev train can be powered by the induction of the generator coil. Usually, when the converter 40 is used to power the maglev train, the converter 40 needs to output high-frequency AC power, so as to form a contactless power generation circuit through the generator coil of the maglev train to meet the power needs of train equipment and personnel. For example, in actual applications, the frequency is usually above kHz. Of course, in specific occasions, the frequency, amplitude, phase and other parameters of the high-frequency AC power output by the converter 40 can be set and adjusted as needed.

[0073] For example, in a specific embodiment of the present invention, when the maglev train is powered by the converter 40, the converter 40 is specifically used for:

[0074] When receiving the first instruction sent by the operation control system 10, the AC power provided by the traction control system 20 is received and the current conversion control in the first mode is performed. By simulating high-frequency harmonics, AC power is output to the stator winding, so that the maglev train is powered by induction of the generating coil.

[0075] This implementation takes into account that when the first traction device 30 is working normally, the generator coil in the maglev train generates an induced voltage by inducing high-frequency harmonics. Therefore, when the converter device 40 performs converter control in the first mode, it can output alternating current to the stator winding by simulating high-frequency harmonics, so that the maglev train can induce the high-frequency harmonics through the generator coil, thereby providing power to the maglev train.

[0076] In the second mode, low-speed traction is achieved by using the converter 40. Specifically, when receiving the second instruction sent by the operation control system 10, the converter 40 can receive the AC power provided by the traction control system 20 and perform converter control in the second mode.

[0077] In the second mode, the specific current conversion control method of the converter 40 can be set according to actual needs, but it is necessary to output alternating current to the stator winding so as to be able to pull the maglev train. Usually, when the maglev train is pulled by the converter 40, the converter 40 will output low-frequency alternating current. For example, in actual applications, the frequency is usually within 50 Hz. Of course, in specific occasions, the frequency, amplitude, phase and other parameters of the low-frequency alternating current output by the converter 40 can be set and adjusted as needed.

[0078] It should be emphasized that the first traction device 30 can be used to power the maglev train and to pull it at medium and high speeds at the same time, so the cost of the first traction device 30 is relatively high, that is, the specifications of the components inside the first traction device 30 are relatively high. Through the converter 40, the present application can select the converter 40 to power the maglev train or to pull the maglev train, rather than the first traction device 30 to power the maglev train and to pull it at the same time. Therefore, a low-cost component can be selected to implement the converter 40, that is, the converter 40 of the present application is not a hardware backup of the first traction device 30, but plays a role in the redundancy of the power supply function and the traction function. When powering, it is only necessary to simulate high-frequency harmonics, and it is not necessary to provide traction. Therefore, when powering, the power requirements for the switch components in the converter 40 are relatively low. When traction is performed, the speed level of traction is lower than the speed level of traction performed by the first traction device 30, that is, the converter 40 only needs to support low-speed traction, and there is no need to consider power supply during traction. Therefore, when traction, the power requirements for the switch components in the converter 40 are also relatively low.

[0079] Since the converter 40 is controlled by the operation control system 10, the low-speed traction / power supply of the converter 40 can be switched instantly as needed. That is, the operation control system 10 can make a comprehensive condition judgment based on the power demand, speed protection, fault level, maintenance window period and other factors of the maglev train. When it is necessary to power the maglev train, the high-frequency inversion function of the converter 40 is turned on to power the maglev train. When it is necessary to tow the maglev train to a fixed position, the operation control system 10 implements the traction of the maglev train under the condition of speed protection through the low-speed traction function of the converter 40.

[0080] It can also be understood that, since the power supply of the mainline area of ​​the maglev train can be achieved through the converter 40 and the first traction device 30, the solution of the present application can eliminate the design of the third rail in the mainline area, that is, the maglev train can stop at any time in the mainline area, and can also depart immediately after stopping.

[0081] Furthermore, the present application also arranges a converter 40 in the maintenance area. The maintenance area can be pre-set, for example, specifically including a high-speed maglev maintenance area, a depot line, a train base, a station and other areas.

[0082] As described above, since the power supply of the mainline area of ​​the maglev train can be realized by both the converter 40 and the first traction device 30, the design of the third rail can be eliminated in the mainline area, and since the converter 40 is also arranged in the maintenance area of ​​the present application, the design of the third rail can also be eliminated in the maintenance area. That is to say, in the solution of the present application, since the converter is arranged in both the mainline area and the maintenance area, the design of the third rail can be eliminated in all areas.

[0083] When the maglev train is in the maintenance area, similar to the principle of the converter 40 in the mainline area mentioned above, the converter 40 can be used to realize low-speed traction in the maintenance area or to realize power supply of the maglev train. That is, the operation control system 10 can select the function of the converter 40 by sending the first instruction or the second instruction. The principle can be referred to in the above text, and will not be repeated here.

[0084] Furthermore, in a specific embodiment of the present invention, it may also include: a second traction device arranged in the maintenance area, used to receive the alternating current provided by the traction control system and perform current conversion, and output alternating current to the stator winding to pull the maglev train, and enable the maglev train to be powered by induction of the generating coil.

[0085] In this implementation, considering some occasions, a second traction device may also be arranged in the maintenance area to cope with special needs, for example, considering the failure of the inverter 40 in the maintenance area.

[0086] Of course, it should be noted that, since the cost of the first traction device 30 and the second traction device is relatively high, in practical applications, a more common method is to only install the inverter 40 in the maintenance area. Figure 3 The maintenance area is where only the inverter 40 is installed.

[0087] As described above, the converter 40 can be set to an AC-DC-AC structure, that is, the converter 40 is a converter 40 that converts the AC power provided by the traction control system 20 into DC power, and then converts it into AC power for output. And because the converter 40 needs to perform high-frequency inversion to power the maglev train, all the switching devices in the converter 40 can be high-frequency switching devices. For example, in a specific occasion, all the switching devices in the converter 40 are IGBTs, or IGCTs, or SICs and other high-frequency switching devices. Of course, in other occasions, other suitable device types can be selected.

[0088] As described above, when the maglev train is pulled by the first traction device 30, the maglev train usually runs at medium and high speeds, and when the maglev train is pulled by the converter device 40, the maglev train can run at low speeds, reducing the specification requirements for the converter device 40. Therefore, in a specific embodiment of the present invention, when the maglev train is pulled by the first traction device 30, the first traction device 30 is specifically used to: output AC power to the stator winding so that the maglev train runs within the speed range of [a, b]. When the maglev train is pulled by the converter device 40, the converter device 40 is specifically used to: output AC power to the stator winding so that the maglev train runs within the speed range of (0, c); wherein a is the set high-speed running lower limit value, b is the set high-speed running upper limit value, c is the set low-speed running upper limit value, and c<a. It can be seen that the interval [a, b] is the speed interval when the maglev train runs at medium and high speeds, and (0, c] is the speed interval when the maglev train runs at low speeds.

[0089] This embodiment sets the upper limit of low-speed operation to be lower than the lower limit of high-speed operation, so that when the maglev train is towed by the converter 40 , the speed will not be too high, thereby avoiding damage to the converter 40 .

[0090] Accordingly, in a specific embodiment of the present invention, when the maglev train is towed by the second traction device, the second traction device is specifically used to: output AC power to the stator winding so that the maglev train runs within the speed range of [a, b]; when the maglev train is towed by the converter 40, the converter 40 is specifically used to: output AC power to the stator winding so that the maglev train runs within the speed range of (0, c]; wherein a is the set high-speed operation lower limit value, b is the set high-speed operation upper limit value, c is the set low-speed operation upper limit value, and c<a.

[0091] This embodiment sets the upper limit of low-speed operation to be lower than the lower limit of high-speed operation, so that when the maglev train is towed by the converter 40 , the speed will not be too high, thereby avoiding damage to the converter 40 .

[0092] In a specific embodiment of the present invention, the operation control system 10 can also be used to output a prompt message of a failure of the first traction device 30 after sending the first instruction or the second instruction to the converter 40 when the maglev train is located in the mainline area.

[0093] Considering that the maglev train usually does not slow down or stop in the mainline area, when the inverter 40 is enabled, an abnormal situation usually occurs and the first traction device 30 fails. Therefore, the operation control system 10 can output a prompt message of the failure of the first traction device 30 to facilitate relevant staff to notice the situation in time.

[0094] By applying the technical solution provided by the embodiment of the present invention, when the operation control system 10, the traction control system 20, and the first traction device 30 operate normally, in the main line area, through the AC power provided by the traction control system 20, the first traction device 30 can receive the AC power provided by the traction control system 20 and perform current conversion, and output AC power to the stator winding to traction the maglev train. In addition, the maglev train can run at medium and high speeds when running in the main line area, so the first traction device 30 can also power the maglev train through the induction of the generator coil while traction of the maglev train. If the first traction device 30 fails, since the current conversion device 40 is provided in the solution of the present application, power supply or traction can be performed through the current conversion device 40. Specifically, when receiving the first instruction sent by the operation control system 10, the current conversion device 40 will receive the AC power provided by the traction control system 20 and perform current conversion control in the first mode. Through the current conversion control at this time, after the AC power is output to the stator winding, the maglev train can be powered by the induction of the generator coil. Therefore, it can be seen that in the solution of the present application, there is no need to arrange any third rail in the main line area, and the train can be powered by the first traction device 30 or the converter 40. If the second instruction sent by the operation control system 10 is received, the converter 40 will receive the alternating current provided by the traction control system 20 and perform the converter control in the second mode. Through the converter control at this time, the maglev train can be pulled after the alternating current is output to the stator winding. Therefore, when the maglev train fails in the main line area, the solution of the present application does not need to use a trailer, but can use the converter 40 to pull the maglev train to a designated location to handle the fault. In addition, the converter 40 of the present application is also arranged in the maintenance area, so that the maglev train can also be pulled or powered by the converter 40 in the maintenance area. Therefore, the design of the third rail can also be cancelled in the maintenance area. In other words, the solution of the present application can cancel the design of the third rail in all areas.

[0095] In summary, the solution of the present application can effectively improve the reliability of the ground traction power supply system of the maglev train by providing a converter 40, and since the third rail power supply design is cancelled in the entire area, additional line losses during the third rail power supply and safety hazards can be avoided.

[0096] Corresponding to the above embodiment of the ground traction power supply system of the maglev train, the embodiment of the present invention further provides a ground traction power supply method of the maglev train, which can be referred to in correspondence with the above.

[0097] See also Figure 4 FIG. 1 is a flow chart of an implementation method of a ground traction power supply method for a maglev train in the present invention, comprising:

[0098] Step S401: the traction control system provides AC power to the first traction device and the converter device under the control of the operation control system;

[0099] Step S402: The first traction device arranged in the main line area receives the AC power provided by the traction control system and performs current conversion, and outputs the AC power to the stator winding to pull the maglev train, so that the maglev train is powered by induction of the generator coil;

[0100] Step S403: When receiving the first instruction sent by the operation control system, the converter arranged in the main line area and the maintenance area receives the AC power provided by the traction control system and performs converter control in the first mode to output AC power to the stator winding, so that the maglev train is powered by induction of the generator coil;

[0101] Step S404: When receiving the second instruction sent by the operation control system, the converter receives the AC power provided by the traction control system and performs converter control in the second mode to output AC power to the stator winding for traction of the maglev train.

[0102] In a specific embodiment of the present invention, it also includes:

[0103] The second traction device arranged in the maintenance area receives the AC power provided by the traction control system and converts the AC power, and outputs the AC power to the stator winding to pull the maglev train, so that the maglev train is powered by induction of the generator coil;

[0104] In a specific embodiment of the present invention, the second traction device performs traction of the maglev train, including: the second traction device outputs alternating current to the stator winding, so that the maglev train runs within a speed range of [a, b];

[0105] The converter described in step S404 performs traction of the maglev train, including:

[0106] The converter outputs AC power to the stator winding, so that the maglev train runs within the speed range of (0, c];

[0107] Wherein, a is the set high-speed operation lower limit value, b is the set high-speed operation upper limit value, c is the set low-speed operation upper limit value, and c<a.

[0108] In a specific embodiment of the present invention, the first traction device described in step S402 outputs AC power to the stator winding to pull the maglev train, including:

[0109] The first traction device outputs alternating current to the stator winding, so that the maglev train runs within a speed range of [a, b];

[0110] The converter device described in step S404 outputs AC power to the stator winding to pull the maglev train, including:

[0111] The converter outputs AC power to the stator winding, so that the maglev train runs within the speed range of (0, c];

[0112] Wherein, a is the set high-speed operation lower limit value, b is the set high-speed operation upper limit value, c is the set low-speed operation upper limit value, and c<a.

[0113] In a specific implementation of the present invention, step S403 includes:

[0114] When receiving the first instruction sent by the operation control system, the converter receives the AC power provided by the traction control system and performs converter control in the first mode, and outputs AC power to the stator winding by simulating high-frequency harmonics, so that the maglev train is powered by induction of the generator coil.

[0115] In a specific embodiment of the present invention, it also includes:

[0116] When the maglev train is located in the mainline area, the operation control system outputs prompt information of a first traction device failure after sending the first instruction or the second instruction to the converter.

[0117] In a specific embodiment of the present invention, the converter is a converter that converts the AC power provided by the traction control system into DC power and then converts it into AC power for output, and each switch device in the converter is a high-frequency switch device.

[0118] In a specific implementation of the present invention, each switching device in the converter is an IGBT, or an IGCT, or a SIC.

[0119] Corresponding to the above embodiments of the ground traction power supply system and method of a maglev train, an embodiment of the present invention further provides a maglev train ground device, which may include a ground traction power supply system of a maglev train as in any of the above embodiments, which may be referred to in correspondence with the above.

[0120] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0121] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0122] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the technical solution and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A ground traction power supply system for a maglev train, characterized in that: include: Operation control system; A traction control system, used for providing AC power to the first traction device and the converter device under the control of the operation control system; The first traction device arranged in the main line area is used to receive the alternating current provided by the traction control system and perform current conversion, and output the alternating current to the stator winding to pull the maglev train, and the maglev train is powered by induction of the generator coil; The inverter device arranged in the main line area and the maintenance area is used to: when receiving the first instruction sent by the operation control system, receive the alternating current provided by the traction control system and perform the inverter control in the first mode to output alternating current to the stator winding, so that the maglev train is powered by induction of the generating coil; when receiving the second instruction sent by the operation control system, receive the alternating current provided by the traction control system and perform the inverter control in the second mode to output alternating current to the stator winding for traction of the maglev train.

2. The ground traction power supply system of a maglev train according to claim 1, characterized in that: Also includes: The second traction device arranged in the maintenance area is used to receive the AC power provided by the traction control system and perform current conversion, and output AC power to the stator winding to pull the maglev train, and the maglev train is powered by induction of the generator coil.

3. The ground traction power supply system of the maglev train according to claim 2, characterized in that: When the maglev train is pulled by the second traction device, the second traction device is specifically used to: output alternating current to the stator winding so that the maglev train runs within a speed range of [a, b]; When the maglev train is pulled by the converter, the converter is specifically used to: output AC power to the stator winding so that the maglev train runs within a speed range of (0, c]; Wherein, a is the set high-speed operation lower limit value, b is the set high-speed operation upper limit value, c is the set low-speed operation upper limit value, and c<a.

4. The ground traction power supply system of a maglev train according to claim 1, characterized in that: When the maglev train is towed by the first traction device, the first traction device is specifically used to: output alternating current to the stator winding so that the maglev train runs within a speed range of [a, b]; When the maglev train is pulled by the converter, the converter is specifically used to: output AC power to the stator winding so that the maglev train runs within a speed range of (0, c]; Wherein, a is the set high-speed operation lower limit value, b is the set high-speed operation upper limit value, c is the set low-speed operation upper limit value, and c<a.

5. The ground traction power supply system of a maglev train according to claim 1, characterized in that: When the maglev train is powered by the converter, the converter is specifically used for: When receiving the first instruction sent by the operation control system, the alternating current provided by the traction control system is received and current conversion control in the first mode is performed, and alternating current is output to the stator winding by simulating high-frequency harmonics, so that the maglev train is powered by induction of the generating coil.

6. The ground traction power supply system of a maglev train according to claim 1, characterized in that: The operation control system is also used for: When the maglev train is located in the mainline area, after sending the first instruction or the second instruction to the converter, prompt information of the failure of the first traction device is output.

7. The ground traction power supply system of a maglev train according to any one of claims 1 to 6, characterized in that: The converter device converts the AC power provided by the traction control system into DC power and then converts it into AC power for output, and each switch device in the converter device is a high-frequency switch device.

8. The ground traction power supply system of the maglev train according to claim 7, characterized in that: Each switch device in the converter is an IGBT, or an IGCT, or a SIC.

9. A ground traction power supply method for a maglev train, characterized in that: include: The traction control system provides AC power to the first traction device and the converter device under the control of the operation control system; The first traction device arranged in the main line area receives the AC power provided by the traction control system and performs current conversion, and outputs the AC power to the stator winding to pull the maglev train, and the maglev train is powered by induction of the generator coil; The converter arranged in the main line area and the maintenance area receives the AC power provided by the traction control system and performs converter control in the first mode when receiving the first instruction sent by the operation control system, so as to output AC power to the stator winding, so that the maglev train is powered by induction of the generator coil; When receiving the second instruction sent by the operation control system, the converter receives the AC power provided by the traction control system and performs converter control in the second mode to output AC power to the stator winding for traction of the maglev train.

10. The ground traction power supply method for a maglev train according to claim 9, characterized in that: Also includes: The second traction device arranged in the maintenance area receives the AC power provided by the traction control system and converts the AC power, and outputs the AC power to the stator winding to pull the maglev train, and the maglev train is powered by induction of the generator coil.

11. The ground traction power supply method for a maglev train according to claim 9, characterized in that: The first traction device outputs alternating current to the stator winding to pull the maglev train, including: The first traction device outputs alternating current to the stator winding, so that the maglev train runs within a speed range of [a, b]; The converter outputs alternating current to the stator winding to pull the maglev train, including: The converter outputs alternating current to the stator winding, so that the maglev train runs within a speed range of (0, c]; Wherein, a is the set high-speed operation lower limit value, b is the set high-speed operation upper limit value, c is the set low-speed operation upper limit value, and c<a.

12. The ground traction power supply method for a maglev train according to claim 9, characterized in that: When receiving the first instruction sent by the operation control system, the current conversion device receives the alternating current provided by the traction control system and performs current conversion control in the first mode to output alternating current to the stator winding, so that the maglev train is powered by induction of the generating coil, including: When receiving the first instruction sent by the operation control system, the converter receives the alternating current provided by the traction control system and performs converter control in the first mode, and outputs alternating current to the stator winding by simulating high-frequency harmonics, so that the maglev train is powered by induction of the generating coil.

13. The ground traction power supply method for a maglev train according to claim 9, characterized in that: Also includes: When the maglev train is located in the mainline area, the operation control system outputs prompt information of the failure of the first traction device after sending the first instruction or the second instruction to the converter.

14. The ground traction power supply method for a maglev train according to any one of claims 9 to 13, characterized in that: The converter device converts the AC power provided by the traction control system into DC power and then converts it into AC power for output, and each switch device in the converter device is a high-frequency switch device.

15. A ground device for a maglev train, characterized in that: A ground traction power supply system for a maglev train comprising the system described in any one of claims 1 to 8.

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