CN111071041A - Vehicle-mounted power supply system - Google Patents
Vehicle-mounted power supply system Download PDFInfo
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- CN111071041A CN111071041A CN201811215760.9A CN201811215760A CN111071041A CN 111071041 A CN111071041 A CN 111071041A CN 201811215760 A CN201811215760 A CN 201811215760A CN 111071041 A CN111071041 A CN 111071041A
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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
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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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
- B60L13/00—Electric propulsion for monorail vehicles, suspension vehicles or rack railways; Magnetic suspension or levitation for vehicles
- B60L13/04—Magnetic suspension or levitation for vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a vehicle-mounted power supply system used in a carriage of a magnetic suspension train, wherein the vehicle-mounted power supply system supplies power for vehicle-mounted electric equipment of the carriage, each carriage of the magnetic suspension train is respectively provided with the vehicle-mounted power supply system, and the vehicle-mounted power supply system comprises: a power supply device; n vehicle-mounted power grids, wherein N is a positive integer more than 2; a car electrical energy storage device; and a switching device; and each vehicle-mounted power grid is respectively connected to the power supply device and the vehicle-mounted electric equipment so as to supply the electric energy output by the power supply device to the vehicle-mounted electric equipment; the switching device is used for controlling the electric connection of the compartment electric energy storage device and the N vehicle-mounted power grids. The electric energy storage device of each compartment is independently arranged, and the switch device is arranged to control the electric connection between the electric energy storage device of each compartment and each vehicle-mounted power grid, so that the independence of each power grid in a redundant power supply mode can be guaranteed, and the failure of the whole power supply system cannot be caused by power supply measures taken after one or more power grids are in failure.
Description
Technical Field
The invention relates to a train-mounted power supply system, in particular to a high-speed maglev train-mounted power supply system.
Background
The suspension, guide and eddy current brake functions are three basic safety functions of a normally-conductive high-speed magnetic-levitation train, and a safe power supply system is designed for the three safety functions. The normally-conducting high-speed maglev train realizes suspension through electromagnetic force, and when the train runs, the power generation coil embedded in the suspension magnet induces the magnetic flux change of the stator to supply power to the train (when the train runs at low speed, the power supply capacity is insufficient, and a vehicle-mounted storage battery or other power supply modes are needed to provide enough electric energy); that is, the levitating electromagnetic field is also a prerequisite for the power supply of the generating coil. When a power supply system (such as a storage battery) fails to supply power to the suspension system, a suspension electromagnetic field cannot be established, and a power generation coil cannot supply power, so that the magnetic-levitation train falls off, and serious personal safety accidents and property loss are caused in the high-speed running process.
The traditional power distribution mode of various rail vehicles is generally a main power supply, a short-circuit protection device, a bus device and an electric load, and an emergency power distribution network is added to solve the problem of the failure of the main power distribution network, and the power distribution mode of the rail vehicles requires a long-term contact type power supply line or a generator with a transmission device to supply power. Therefore, in a high-speed maglev train, a long-term contact type power supply line is not adopted. German TR08 and TR09 magnetic-levitation trains adopt redundant multi-power-grid to realize a safe power supply system, wherein each train has 4 completely independent direct-current 440V power grids; each power grid is provided with a 440V storage battery which is controllable in connection and is used as a buffer; each power grid is provided with a plurality of independent 440V basic power supply units; a decoupling diode is connected between each 440V basic power supply unit and the power grid in series; the suspension controller obtains electricity from 4 440V power grids according to a certain distribution rule, and the remaining suspension force can maintain the continuous operation of the train after one power grid fails.
The disadvantages of the above solution are:
after one power grid fails, the train can continue to run, but the running quality and the safety performance are obviously reduced, mainly the clearance control error of suspension and guidance is increased, the bearing capacity is reduced, the stability of the train body is reduced, and the like.
In order to solve the above problems, chinese patent CN1234556C provides a power supply device for a normally-conducting high-speed magnetic levitation vehicle, which includes a power generation device and a power supply device, as shown in fig. 1, the power generation device is as follows:
① each linear generating winding Gi is composed of generating coils respectively located on 5 adjacent suspension magnetic poles in series connection in the forward direction, wherein i is l, 2, 3, 4;
②, the converter Hi corresponding to each linear generating winding Gi takes the output of the generating winding Gi as input, and leads the output voltage to be stably transmitted to the corresponding vehicle-mounted power grid Ni in a chopping control mode;
③ each set of vehicle-mounted power grid Ni is provided with a corresponding storage battery Bi;
④ each car is provided with 4 sets of vehicle-mounted power grids Nl, N2, N3 and N4, and the 4 sets of vehicle-mounted power grids are also provided with two redundant real-time high-speed grid-connected circuits ASNC-1 and ASNC-2;
⑤ the 8 converters Hi of each set of vehicle-mounted power grid Ni are separated by output diodes and then combined to form a floating charging relation with the corresponding storage battery Bi, and the positive end of the converter Hi is integrated with a forward diode.
The power supply device comprises the following components:
① the power supplies of the control units of two suspension electromagnets and two guide electromagnets corresponding to the same suspension rack are taken from different power grids;
② each eddy current brake electromagnet is divided into 4 control units, 8 units for eddy current brake control are divided into 4 groups, and the power supply is respectively taken from the 4 power grids Ni.
The real-time high-speed grid-connected circuits ASNC-1 and ASNC-2 disclosed in CN1234556C are redundant architectures of each other. Under conditions where Nl, N2, N3, and N4 are operating properly, they independently supply power to their respective loads. After one power grid fails, if the failure condition permits, the ASNC-1 or the ASNC-2 merges the other three power grids to supply power to the failed power grid, so that all the power loads can still work normally.
From the above description, ASNC-1 or ASNC-2 merges a non-failing grid into a failing grid supply in the event of a grid failure condition warrants. However, this solution has the following problems:
①, because the voltage of the non-failure power grid is unlikely to be the same and the storage battery is independently configured, the short circuit cannot be directly merged, but the non-failure power grid and the failure power grid have to be combined, and the capacity of one power grid does not necessarily meet the load requirements of the two power grids, so the scheme may cause the reduction of power supply stability and reliability.
②, the direct grid-connection mode is adopted, which makes the original independent power grid become no longer independent, if the fault occurs again in the process of combining power supply, such as the short-circuit fault of the power grid, the whole power supply system can be crashed, therefore, the function of cutting off the fault such as short circuit must be configured in time.
Disclosure of Invention
In order to solve the above problems, the present invention provides a vehicle-mounted power supply system for a carriage of a magnetic levitation train, wherein the vehicle-mounted power supply system supplies power to vehicle-mounted electric equipment of the carriage, each carriage of the magnetic levitation train is respectively provided with the vehicle-mounted power supply system, and the vehicle-mounted power supply system comprises: a power supply device; n vehicle-mounted power grids, wherein N is a positive integer more than 2; a car electrical energy storage device; and a switching device; and each vehicle-mounted power grid is respectively connected to the power supply device and the vehicle-mounted electric equipment so as to supply the electric energy output by the power supply device to the vehicle-mounted electric equipment; the switching device is used to control the electrical connection of the cabin electrical energy storage device to the N on-board electrical systems, so that the cabin electrical energy storage device selectively feeds electrical energy into or discharges electrical energy out of at least one of the N on-board electrical systems.
The electric energy storage device of each compartment is independently arranged, and the switching device is arranged to control the electric connection between the electric energy storage device of each compartment and each vehicle-mounted power grid, so that the independence of each power grid in a redundant power supply mode can be guaranteed.
Preferably, the switching device connects the cabin electrical energy storage device to the at least one on-board electrical system in the event of a fault in the at least one of the N on-board electrical systems.
Preferably, the fault is one or more of a power supply system equipment output fault, a power utilization system equipment input fault and a storage battery fault.
Preferably, each of the N onboard electrical systems is electrically connected to a respective at least one electrical system electrical energy storage device for the purpose of supplying electrical energy to or discharging electrical energy from the at least one electrical system electrical energy storage device.
Preferably, the N onboard power grids are dc 600V, dc 440V or dc 24V power grids.
Preferably, the N onboard electrical systems are 4 onboard electrical systems.
Preferably, the on-board power supply system has M switching devices and M corresponding car electrical energy storage devices, each of the M switching devices individually controls electrical connection of the corresponding car electrical energy storage device to the N on-board power grids, where M is a positive integer.
Preferably, the cabin electrical energy storage device and the grid electrical energy storage device comprise one or more of a lithium battery, a super capacitor, a graphene battery, a vanadium battery, a water-based zinc battery.
Compared with the prior art, the technical scheme of the invention can ensure that the system breakdown does not occur in the redundant power supply process. Is beneficial to improving the running quality of the train, and particularly comprises the following steps:
a) by adopting the vehicle-mounted power supply system, the independence of the power grid can be kept even if the fault occurs again in the redundant power supply process, and the power supply measures adopted after one or more power grid faults can not cause the failure of the whole power supply system and can still maintain the running of the train;
b) by adopting the vehicle-mounted power supply system, the breakdown of the whole power supply system caused by short-circuit faults can be avoided;
c) by adopting the vehicle-mounted power supply system, the storage battery can be used in a time-sharing manner through the control logic of the switch unit, and the running quality of the train is further improved.
Drawings
The foregoing summary, as well as the following detailed description of the invention, will be better understood when read in conjunction with the appended drawings. It is to be noted that the appended drawings are intended as examples of the claimed invention. In the drawings, like reference characters designate the same or similar elements.
Fig. 1 is a prior art vehicle-mounted power supply system.
Fig. 2 is a schematic diagram of the basic components of the vehicle-mounted power supply system, and the input/output connection relationship between the vehicle-mounted power supply device and the vehicle-mounted electric device.
Fig. 3 shows the switching device and the cabin electrical energy storage device of the on-board power supply system of the invention.
Detailed Description
The detailed features and advantages of the present invention are described in detail in the detailed description which follows, and will be sufficient for anyone skilled in the art to understand the technical content of the present invention and to implement the present invention, and the related objects and advantages of the present invention will be easily understood by those skilled in the art from the description, claims and drawings disclosed in the present specification.
The basic composition of the vehicle-mounted power supply system and the input/output connection relationship between the vehicle-mounted power supply device and the vehicle-mounted electric device according to the present invention will be described with reference to fig. 2.
The invention provides a vehicle-mounted power supply system used in a carriage of a magnetic suspension train, wherein the vehicle-mounted power supply system supplies power for vehicle-mounted electric equipment of the carriage, each carriage of the magnetic suspension train is respectively provided with the vehicle-mounted power supply system, and the vehicle-mounted power supply system comprises: the system comprises a power supply device PS, 4 vehicle-mounted power grids G1-G4, a redundant storage battery Br and a switch device Su.
For a high-speed magnetic suspension train, external power supply is only carried out at an entrance station and an exit station, a train power supply line network is not arranged along the way, a generator driven by a transmission mechanism is not arranged on the train, but a linear generator automatically generates power when the train normally runs, or a non-contact induction pickup coil generates alternating current and sends the alternating current to a boosting chopper HS. In addition, one path of direct current provided by the current collector is subjected to overvoltage protection and distribution processing by an external power supply vehicle-mounted power grid distributor and then shares a boost chopper HS with the linear generator for processing. The ac power is rectified, boosted or chopped (DC/DC converted) by a boost chopper HS, and converted into DC power of high-level voltage, for example, 440V DC power as shown in the figure or 600V DC power. The alternating current is generated by a linear generator and/or a non-contact inductive pick-up coil known from the prior art and/or supplied via a current collector and an external power supply vehicle electrical system distributor as described above as power supply means PS of the vehicle electrical system. Further, the high-level voltage direct current is chopped by the DC/DC converter to obtain low-level direct current, such as 24V direct current, and the high-level voltage direct current is inverted by the inverter to obtain alternating current, such as 230V alternating current, so as to meet the voltage requirements of different vehicle-mounted electric devices. The 440V dc power grid, the 600V dc power grid and the 24V dc power grid are all examples of the onboard power grid in the present invention.
Each of the 4 on-vehicle electrical networks G1-G4 of the same voltage class is connected to the power supply device PS and the on-vehicle electrical equipment, respectively, to directly or indirectly supply the electrical energy output by the power supply device PS to the on-vehicle electrical equipment, in other words, the 4 on-vehicle electrical networks G1-G4 are redundant with each other. Each vehicle-mounted power grid supplies power to the vehicle-mounted electric equipment at the same position or with the same function, so that even if one of the 4 vehicle-mounted power grids G1-G4 fails, the power supply of the vehicle-mounted electric equipment at the same position or with the same function can be guaranteed, and the safety of a train is guaranteed. These in-vehicle electric devices include a levitation controller, a guidance controller, an eddy current brake controller, a DC/DC converter, an inverter, a battery heater, and the like.
In addition, each of the 4 vehicle electrical systems G1-G4 of the same voltage class is electrically connected to a respective at least one grid electrical energy storage device for input or output of electrical energy from or to the at least one grid electrical energy storage device. For example, the 440V on-vehicle electrical network G1 is electrically connected to the battery B1, and during normal operation of the train, the electric power supplied from the above power supply device is rectified and boosted in the boost chopper HS to raise the voltage to the battery B1 voltage level, so that the 440V on-vehicle electrical network G1 can output electric power to the battery B1 to charge the battery B1. In the emergency state, the 440V vehicle-mounted power grid can input electric power from the battery B1, so that the battery B1 supplies electric power to the 440V vehicle-mounted power grid G1. Similarly, 440V vehicle electrical system G2 is electrically connected to battery B2, 440V vehicle electrical system G3 is electrically connected to battery B3, and 440V vehicle electrical system G4 is electrically connected to battery B4. Here, the batteries B1-B4 are examples of the grid power storage device of the present invention, and an environmentally friendly nickel-metal hydride 440VDC battery may be used. Furthermore, the grid electrical energy storage device of the present invention can be one or more of a lithium battery, a super capacitor, a graphene battery, a vanadium battery, a water-based zinc battery.
The switching device and the cabin electrical energy storage device of the on-vehicle power supply system of the invention will be described below with reference to fig. 2 and 3.
Fig. 3 shows the connection relationships between the 440V vehicle electrical systems G1 to G4, the storage batteries B1 to B4, the redundant storage battery Br, and the switching device Su.
The redundant storage battery Br is an example of a cabin electric energy storage device in the invention, and an environment-friendly nickel-metal hydride 440VDC storage battery can be adopted. Furthermore, the cabin electrical energy storage device of the present invention can be one or more of a lithium battery, a super capacitor, a graphene battery, a vanadium battery, a water-based zinc battery.
The switching device Su is used to control the electrical connection of the cabin electrical energy storage device to the 4 onboard electrical systems G1-G4, so that the redundant battery Br selectively inputs electrical energy via at least one of the 4 onboard electrical systems or selectively outputs electrical energy to at least one of the 4 onboard electrical systems. The switching device Su switches on the electrical connection of the cabin electrical energy storage device to at least one of the 4 onboard electrical systems in the event of a fault, for example one or more of a short circuit at the output of the power supply system, a short circuit at the input of the consumer system, a damaged battery or a short circuit fault.
Specifically, the 440V vehicle electrical systems G1 to G4 are all electrically connected to the redundant battery Br through the switching device Su, so that the 440V vehicle electrical systems G1 to G4 can output electric power to the redundant battery Br to charge the redundant battery Br. In an emergency state, for example, when the 440V vehicle-mounted power grid G1 fails, the switch device Su is used to connect the redundant storage battery Br and the 440V vehicle-mounted power grid G1, and the 440V vehicle-mounted power grid G1 can input electric energy from the redundant storage battery Br, so that the storage battery B1 supplies power to the 440V vehicle-mounted power grid G1, and the purpose of redundant power supply is achieved. Similarly, in the event of a fault in the 440V onboard power networks G2, G3, G4, the electrical connection between the redundant battery Br and the 440V onboard power networks G2, G3, G4 can also be established by means of the switching device Su, and the 440V onboard power networks G2, G3, G4 can also be supplied with electrical energy from the redundant battery Br.
For each of the 440V vehicle-mounted power grids G1-G4, for example, 440V vehicle-mounted power grid G1, can be powered by two different electrical energy storage devices, namely battery B1 and redundant battery Br, so even if a fault occurs again during the process of powering the 440V vehicle-mounted power grid G1 by battery B1, the redundant battery Br can be used for powering, and the independence between the 440V vehicle-mounted power grid G1 and the remaining 440V vehicle-mounted power grids G2, G3, and G4 is maintained by switching device Su, so that the power supply measures taken after the fault of the 440V vehicle-mounted power grid G1 or multiple grids do not cause the failure of the whole power supply system, and the breakdown of the whole power supply system caused by the fault such as short circuit can be avoided.
In addition, the switch device Su can independently control the electrical connection between the redundant storage battery Br and each of the 4 onboard power networks G1-G4, the time-sharing use of the redundant storage battery Br can be realized through the control logic of the switch unit, the electric energy of the redundant storage battery Br is reasonably and independently distributed to one or more of the 4 onboard power networks G1-G4 according to the actual conditions of the 4 onboard power networks G1-G4, the power supply stability, the electric energy quality and the like of each onboard power network G1-G4 are improved, and the train operation quality is further improved.
By adopting the vehicle-mounted power supply system, converter nodes in a vehicle-mounted power grid with faults can work again, corresponding power is provided for vehicle-mounted electric equipment, and the running quality of a train is improved.
In this embodiment, the vehicle-mounted power supply system for the magnetic-levitation train car is configured with 4 vehicle-mounted power grids, 1 car electric energy storage device and 1 switching device, or may be configured with 2 or more power grids, a plurality of switching devices and a plurality of car electric energy storage devices of corresponding number, wherein each switching device of the plurality of switching devices individually controls the electrical connection between the corresponding car electric energy storage device and the plurality of vehicle-mounted power grids, so as to achieve the purpose of redundant safe power supply. For example, an on-board power supply system for a magnetic levitation train car may be configured with 8 on-board power grids, 2 car electrical energy storage devices, and 2 switching devices, etc.
The terms and expressions which have been employed herein are used as terms of description and not of limitation. The use of such terms and expressions is not intended to exclude any equivalents of the features shown and described (or portions thereof), and it is recognized that various modifications may be made within the scope of the claims. Other modifications, variations, and alternatives are also possible. Accordingly, the claims should be looked to in order to cover all such equivalents.
Also, it should be noted that although the present invention has been described with reference to the current specific embodiments, it should be understood by those skilled in the art that the above embodiments are merely illustrative of the present invention, and various equivalent changes or substitutions may be made without departing from the spirit of the present invention, and therefore, it is intended that all changes and modifications to the above embodiments be included within the scope of the claims of the present application.
Claims (8)
1. An on-board power supply system for use in a car of a magnetic levitation vehicle, the on-board power supply system supplying power to on-board power consumers of the car, the on-board power supply system being provided in each car of the magnetic levitation vehicle, the on-board power supply system comprising:
a power supply device;
n vehicle-mounted power grids, wherein N is a positive integer more than 2;
a car electrical energy storage device; and
a switching device; and:
each vehicle-mounted power grid is respectively connected to the power supply device and the vehicle-mounted electric equipment so as to supply the electric energy output by the power supply device to the vehicle-mounted electric equipment;
the switching device is used to control the electrical connection of the cabin electrical energy storage device to the N on-board electrical systems, such that the cabin electrical energy storage device selectively inputs electrical energy via at least one of the N on-board electrical systems or selectively outputs electrical energy to at least one of the N on-board electrical systems.
2. The on-board power supply system according to claim 1, wherein the switching device electrically connects the cabin electrical energy storage device to at least one of the N on-board electrical networks when a fault occurs in the at least one of the on-board electrical networks.
3. The vehicle power supply system according to claim 2,
the fault is one or more of power supply system equipment output fault, power utilization system equipment input fault and storage battery fault.
4. The vehicle power supply system according to claim 1,
each of the N onboard electrical systems is electrically connected to a respective at least one electrical system electrical energy storage device for inputting electrical energy from the at least one electrical system electrical energy storage device or for outputting electrical energy to the at least one electrical system electrical energy storage device.
5. The vehicle power supply system according to claim 1,
the N vehicle-mounted power grids are direct-current 600V power grids, direct-current 440V power grids or direct-current 24V power grids.
6. The vehicle power supply system according to claim 1,
the N vehicle-mounted power grids are 4 vehicle-mounted power grids.
7. The vehicle power supply system according to claim 1,
the vehicle-mounted power supply system is provided with M switching devices and M corresponding compartment electric energy storage devices, each switching device in the M switching devices independently controls the corresponding compartment electric energy storage device to be electrically connected with the N vehicle-mounted power grids, and M is a positive integer.
8. The vehicle power supply system according to claim 1,
the compartment electric energy storage device and the grid electric energy storage device comprise one or more of a lithium battery, a super capacitor, a graphene battery, a vanadium battery and a water-based zinc battery.
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| CN201811215760.9A CN111071041B (en) | 2018-10-18 | 2018-10-18 | Vehicle-mounted power supply system |
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| CN201811215760.9A CN111071041B (en) | 2018-10-18 | 2018-10-18 | Vehicle-mounted power supply system |
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| CN112519590A (en) * | 2020-12-03 | 2021-03-19 | 北京磁浮交通发展有限公司 | Magnetic-levitation train and vehicle grounding system thereof |
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| CN111071041B (en) | 2023-05-23 |
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