CN111071041B - Vehicle-mounted power supply system - Google Patents
Vehicle-mounted power supply system Download PDFInfo
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- CN111071041B CN111071041B CN201811215760.9A CN201811215760A CN111071041B CN 111071041 B CN111071041 B CN 111071041B CN 201811215760 A CN201811215760 A CN 201811215760A CN 111071041 B CN111071041 B CN 111071041B
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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)
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- 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 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 electric systems, wherein N is a positive integer more than 2; a cabin electrical energy storage device; and a switching device; each vehicle-mounted power supply system is connected to the power supply device and the vehicle-mounted electric equipment respectively 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 carriage electric energy storage device and the N vehicle-mounted electric systems. Through setting up carriage electric energy storage device for each carriage alone to set up the electric connection of switching device control carriage electric energy storage device and each on-vehicle electric wire netting, can ensure the independence of each electric wire netting under redundant power supply mode, the power supply measure of taking can not lead to whole power supply system to become invalid after one or more electric wire netting trouble.
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 functions of suspension, guiding and eddy current braking are the most basic three safety functions of a normally-guided high-speed magnetic levitation train, and it is particularly important to design a safe power supply system for the three safety functions. The normal-conduction high-speed magnetic levitation train realizes levitation through electromagnetic force, and when the train runs, the magnetic flux change of the stator is induced by the power generation coil embedded in the levitation magnet to supply power to the train (when the speed is low, the power supply capacity is insufficient, and a vehicle-mounted storage battery or other power supply modes are required to provide enough power); that is, the levitation electromagnetic field is also a prerequisite for the power generation coil to be able to supply power. When the power supply system fails (such as a storage battery) and cannot supply power to the levitation system, the levitation electromagnetic field cannot be established, the power generation coil cannot supply power, the maglev train is dropped, and serious personal safety accidents and property loss are caused in the high-speed running process.
Conventional rail vehicle power distribution systems are typically mains-short-circuit protection-bus-loads, and emergency power distribution networks are added to address the aforementioned problems of mains network failure, which require long-term contact-type power supply lines or generator-powered belt drives. Therefore, in the high-speed maglev train, a long-term contact type power supply line is not adopted. The German TR08 and TR09 maglev trains adopt redundant multi-power grids 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 connected controllably as a buffer; each power grid is provided with a plurality of independent 440V basic power supply units; decoupling diodes are connected in series between each 440V basic power supply unit and the power grid; the levitation controller takes power from 4 440V power grids according to a certain distribution rule, so that the residual levitation force can maintain the train to continue running after one power grid fails.
The disadvantage of the above solution is that:
after one power grid fails, the train can continue to run, but the running quality and the safety performance are obviously reduced, mainly including increased clearance control errors of suspension and guiding, reduced bearing capacity, reduced vehicle body stability and the like.
To solve the above problems, chinese patent CN1234556C provides a power supply device for a magnetically levitated vehicle with normal guiding and high speed, which comprises a power generation device and a power supply device, as shown in fig. 1, the power generation device is as follows:
(1) each linear power generation winding Gi is formed by connecting power generation coils respectively positioned on 5 adjacent suspension magnetic poles in series in the forward direction, wherein i=l, 2, 3 and 4;
(2) the converter Hi corresponding to each linear power generation winding Gi takes the output of the power generation winding Gi as input, and keeps the output voltage stably transmitted to the corresponding vehicle-mounted electric network Ni by a chopper control mode;
(3) each set of vehicle-mounted power grid Ni is provided with a corresponding storage battery Bi;
(4) each section of vehicle 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 real-time high-speed grid-connected circuits ASNC-1 and ASNC-2 which are redundant;
(5) the 8 converters Hi of each set of vehicle-mounted power grid Ni are isolated through output diodes and then combined, and form a floating charge relation with the corresponding storage battery Bi. The forward diode is integrated at the positive end of the converter Hi.
The power supply device comprises the following components:
(1) the power supplies of the control units of the two suspension electromagnets and the two guide electromagnets corresponding to the same suspension frame are taken from different power grids;
(2) each eddy current braking electromagnet is divided into 4 control units, 8 units for eddy current braking control are divided into 4 groups, and power sources of the eddy current braking electromagnets are respectively taken from the 4 power grids Ni.
The real-time high-speed grid-connected circuits ASNC-1 and ASNC-2 disclosed by CN1234556C are mutually redundant architectures. Under normal operating conditions Nl, N2, N3 and N4, they independently supply power to the respective loads. After a failure of one grid, if the failure condition permits, ASNC-1 or ASNC-2 will combine the other three grids to supply power to the failed grid, thus ensuring that all the power loads can still work normally.
From the above description, ASNC-1 or ASNC-2 incorporates a non-failing grid to supply power to the failing grid in case of grid failure conditions permitting. However, this solution has the following problems:
(1) since the voltages of the non-failure power grids cannot be the same and are independently provided with storage batteries, the short circuits cannot be directly combined, but the non-failure power grids and the failure power grids have to be connected in a grid mode, and since the capacity of one power grid does not necessarily meet the load requirements of two power grids, the scheme can cause the reduction of power supply stability and reliability.
(2) The original independent power grid is not independent any more by adopting a direct grid connection mode; if faults occur again in the combined power supply process, such as a power grid short circuit fault, the whole power supply system can be crashed; therefore, it is necessary to configure a function of timely shutting down a fault such as a short circuit.
Disclosure of Invention
In order to solve the above problems, the present invention provides a vehicle-mounted power supply system for use in a carriage of a magnetic levitation train, the vehicle-mounted power supply system supplying power to vehicle-mounted electric equipment of the carriage, each carriage of the magnetic levitation train having a vehicle-mounted power supply system therein, the vehicle-mounted power supply system comprising: a power supply device; n vehicle-mounted electric systems, wherein N is a positive integer more than 2; a cabin electrical energy storage device; and a switching device; each vehicle-mounted power supply system is connected to the power supply device and the vehicle-mounted electric equipment respectively 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 carriage electric energy storage device and the N vehicle-mounted electric networks, so that the carriage electric energy storage device selectively inputs electric energy through at least one vehicle-mounted electric network in the N vehicle-mounted electric networks or selectively outputs electric energy to at least one vehicle-mounted electric network in the N vehicle-mounted electric networks.
Through setting up carriage electric energy storage device for each carriage alone to set up the electric connection of switching device control carriage electric energy storage device and each on-vehicle electric wire netting, can ensure the independence of each electric wire netting under redundant power supply mode.
Preferably, the switching device switches on an electrical connection of the vehicle electrical energy storage device to at least one of the N vehicle electrical systems when at least one of the vehicle electrical systems fails.
Preferably, the fault is one or more of a power system equipment output fault, a power system equipment input fault, a battery fault.
Preferably, each of the N on-board electrical systems is electrically connected to a respective at least one electrical network electrical energy storage device for inputting electrical energy from or outputting electrical energy to the at least one electrical network electrical energy storage device.
Preferably, the N on-board electrical networks are a direct current 600V electrical network, a direct current 440V electrical network or a direct current 24V electrical network.
Preferably, the N on-board electrical systems are 4 on-board electrical systems.
Preferably, the vehicle-mounted power supply system has M switching devices and corresponding M cabin electric energy storage devices, each of the M switching devices individually controlling an electrical connection of the corresponding cabin electric energy storage device with the N vehicle-mounted electrical systems, wherein 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 system breakdown does not occur in the redundant power supply process. The method 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 maintained even if faults occur again in the redundant power supply process, the whole power supply system can not be invalid due to power supply measures taken after one or more power grids are in faults, and the running of a train can be maintained;
b) The vehicle-mounted power supply system can avoid the breakdown of the whole power supply system caused by faults such as short circuits;
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 of the invention, as well as the following detailed description of the invention, will be better understood when read in conjunction with the accompanying drawings. It is to be noted that the drawings are merely examples of the claimed invention. In the drawings, like reference numbers indicate identical or similar elements.
Fig. 1 is a prior art vehicle power supply system.
Fig. 2 is a schematic diagram of the basic components of the vehicle-mounted power supply system, the input/output connection relationship of the vehicle-mounted power supply equipment and the vehicle-mounted electric equipment.
Fig. 3 shows a switching device and a 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 will be readily apparent to those skilled in the art from the following detailed description, claims, and drawings that follow.
The basic components of the vehicle-mounted power supply system and the input/output connection relationship of the vehicle-mounted power supply device and the vehicle-mounted electric equipment will be described with reference to fig. 2.
The invention provides a vehicle-mounted power supply system used in 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: the power supply device PS, 4 on-vehicle electric systems G1 to G4, the redundant battery Br, and the switching device Su.
For a high-speed magnetic levitation train, power is supplied from the outside only at an in-out 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, and a linear generator is used for generating power automatically when the train normally runs, or a non-contact induction pickup coil is used for generating alternating current, and the alternating current is sent to a boost chopper HS. In addition, direct current provided by a current collector is subjected to overvoltage protection and distribution treatment by an external power supply vehicle-mounted power grid distributor, and then is processed by sharing a boost chopper HS with a linear generator. The alternating current is rectified, boosted or chopped (DC/DC converted) by a boost chopper HS, and can be converted into direct current of high-level voltage, such as 440V direct current as shown in the drawing, or 600V direct current. The above-described alternating current is generated by a linear generator and/or a non-contact induction pickup coil known in the art and/or supplied through a current collector and an external power supply on-board power distribution unit as the power supply device PS of the on-board power supply system. Further, the DC/DC converter is used for carrying out chopper change on the high-grade voltage direct current to obtain low-grade direct current, such as 24V direct current, and the inverter is used for carrying out inversion on the high-grade voltage direct current to obtain alternating current, such as 230V alternating current, so as to meet the voltage requirements of different vehicle-mounted electric equipment. Here, 440V dc network, 600V dc network, 24V dc network are all examples of the vehicle-mounted power network in the present invention.
Each of the 4 on-vehicle electric networks G1 to G4 of the same voltage class is connected to the above-described power supply device PS and the on-vehicle electric device, respectively, to directly or indirectly supply the electric energy output by the power supply device PS to the on-vehicle electric device, in other words, the 4 on-vehicle electric networks G1 to G4 are mutually redundant. Each vehicle-mounted power supply system supplies power to vehicle-mounted electric equipment with the same position or the same function, so that even if one of the 4 vehicle-mounted power supplies G1-G4 fails, the power supply of the vehicle-mounted electric equipment with the same position or the same function can be ensured, and the safety of a train is ensured. The vehicle-mounted electric equipment comprises a suspension controller, a guiding controller, an eddy current braking controller, a DC/DC converter, an inverter, a storage battery heating device and the like.
Furthermore, each of the 4 on-board electrical systems G1 to G4 of the same voltage class is electrically connected to the 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 outputting electrical energy to the at least one electrical system electrical energy storage device. For example, 440V in-vehicle electric network G1 is electrically connected to battery B1, and when the train is operating normally, the electric power supplied from the power supply device is rectified and boosted in boost chopper HS to increase the voltage to the voltage level of battery B1, so that 440V in-vehicle electric network G1 can output electric power to battery B1 to charge battery B1. In an emergency state, the 440V in-vehicle electric system can input electric energy from battery B1 such that battery B1 supplies electric power to 440V in-vehicle electric system G1. Similarly, 440V in-vehicle electric system G2 is electrically connected to battery B2, 440V in-vehicle electric system G3 is electrically connected to battery B3, and 440V in-vehicle electric system G4 is electrically connected to battery B4. Here, 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 electric energy storage device of the in-vehicle power supply system of the present invention will be described below with reference to fig. 2 and 3.
Fig. 3 shows the connection relationships between the 440V in-vehicle electric systems G1 to G4, the batteries B1 to B4, the redundant battery Br, and the switching device Su.
The redundant battery Br is an example of a compartment electric energy storage device in the present invention, and an environment-friendly nickel-metal hydride 440VDC battery can be used. Furthermore, the compartment 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 above-described 4 on-board electrical systems G1 to G4 such that the redundant battery Br selectively inputs electrical energy through or outputs electrical energy to at least one of the 4 on-board electrical systems. When at least one of the 4 on-board electrical systems fails, for example one or more of a short-circuit of the power supply system device output, a short-circuit of the power supply system device input, a battery failure or a short-circuit failure, the switching device Su switches on the electrical connection of the cabin electrical energy storage device to the at least one on-board electrical system.
Specifically, the 440V in-vehicle electric systems G1 to G4 are all electrically connected to the redundant battery Br through the switching device Su, so that the 440V in-vehicle electric systems G1 to G4 can output electric energy to the redundant battery Br to charge the redundant battery Br. In an emergency state, for example, when the 440V vehicle-mounted electric system G1 fails, the electrical connection between the redundant storage battery Br and the 440V vehicle-mounted electric system G1 is connected through the switching device Su, and the 440V vehicle-mounted electric system G1 can input electric energy from the redundant storage battery Br, so that the storage battery B1 supplies power to the 440V vehicle-mounted electric system G1, and the purpose of redundant power supply is achieved. Similarly, even if the 440V in-vehicle electrical systems G2, G3, G4 fail, the switching device Su can switch on the electrical connection between the redundant battery Br and the 440V in-vehicle electrical systems G2, G3, G4, respectively, and the 440V in-vehicle electrical systems G2, G3, G4 can also receive electrical energy from the redundant battery Br.
For each of the 440V electrical systems G1 to G4, for example, 440V electrical system G1, it is possible to supply power from two different electrical energy storage devices, namely, battery B1 and redundant battery Br, so that even if a fault occurs again during the supply of 440V electrical system G1 with battery B1, redundant battery Br can be used for supplying power, and the independence between 440V electrical system G1 and the remaining 440V electrical systems G2, G3, G4 is maintained by switching device Su, so that the supply measures taken after a fault of 440V electrical system G1 or a plurality of electrical systems do not lead to a failure of the entire supply system, and it is possible to avoid a breakdown of the entire supply system due to a fault such as a short circuit.
In addition, since the switching device Su can independently control the electrical connection of the redundant battery Br with each of the 4 on-vehicle electric systems G1 to G4, the time-sharing use of the redundant battery Br can be realized by the control logic of the switching unit, and the electric energy of the redundant battery Br is reasonably and independently distributed to one or more electric systems of the 4 on-vehicle electric systems G1 to G4 according to the actual conditions of the 4 on-vehicle electric systems G1 to G4, thereby improving the power supply stability, the electric energy quality, and the like of each of the 4 on-vehicle electric systems G1 to G4, and further improving the train operation quality.
By adopting the vehicle-mounted power supply system, the converter node in the failed vehicle-mounted power supply system can also be operated again, corresponding power is provided for the vehicle-mounted electric equipment, and the running quality of the train is improved.
In this embodiment, the on-board power supply system for use in the maglev train cars is configured with 4 on-board electric power systems, 1 car electric energy storage device, and 1 switching device, and may also be configured with 2 or more electric power systems, a plurality of switching devices, and a corresponding number of a plurality of car electric energy storage devices, wherein each of the plurality of switching devices individually controls the electrical connection of the corresponding car electric energy storage device with the plurality of on-board electric power systems, to achieve the purpose of redundant safety power supply. For example, an on-board power supply system for use in a maglev train car may be provided with 8 on-board power supplies, 2 car electric energy storage devices, 2 switching devices, and the like.
The terms and expressions which have been employed herein are used as terms of description and not of limitation. The use of these terms and expressions is not meant to exclude any equivalents of the features shown and described (or portions thereof), and it is recognized that various modifications are possible and are intended to be included 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 while the present invention has been described with reference to the particular embodiments presently, it will be appreciated by those skilled in the art that the above embodiments are provided for illustration only and that various equivalent changes or substitutions may be made without departing from the spirit of the invention, and therefore, the changes and modifications to the above embodiments shall fall within the scope of the claims of the present application as long as they are within the true spirit of the invention.
Claims (7)
1. A vehicle-mounted power supply system for use in a car of a magnetic levitation train, the vehicle-mounted power supply system supplying power to vehicle-mounted electrical equipment of the car, each car of the magnetic levitation train having the vehicle-mounted power supply system therein, the vehicle-mounted power supply system comprising:
a power supply device;
n vehicle-mounted electric systems, wherein N is a positive integer more than 2; each of the N on-board electrical networks is electrically connected with a respective at least one electrical network electrical energy storage device to input electrical energy from or output electrical energy to the at least one electrical network electrical energy storage device;
a cabin electrical energy storage device; and
a switching device; and:
each vehicle-mounted power supply system is connected to the power supply device and the vehicle-mounted electric equipment respectively so as to supply 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 carriage electric energy storage device and the N vehicle-mounted electric networks so that the carriage electric energy storage device selectively inputs electric energy through at least one vehicle-mounted electric network in the N vehicle-mounted electric networks or selectively outputs electric energy to at least one vehicle-mounted electric network in the N vehicle-mounted electric networks.
2. The in-vehicle power supply system according to claim 1, characterized in that the switching device turns on an electrical connection of the cabin electrical energy storage device with at least one of the N in-vehicle electrical systems when the at least one in-vehicle electrical system fails.
3. The vehicle power supply system according to claim 2, wherein,
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, wherein,
the N vehicle-mounted power grids are direct current 600V power grids, direct current 440V power grids or direct current 24V power grids.
5. The vehicle power supply system according to claim 1, wherein,
the N on-board electrical networks are 4 on-board electrical networks.
6. The vehicle power supply system according to claim 1, wherein,
the vehicle-mounted power supply system is provided with M switch devices and corresponding M carriage electric energy storage devices, wherein each switch device in the M switch devices independently controls the electric connection between the corresponding carriage electric energy storage device and the N vehicle-mounted electric networks, and M is a positive integer.
7. The vehicle power supply system according to claim 1, wherein,
the car 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, and a water-based zinc battery.
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| Application Number | Priority Date | Filing Date | Title |
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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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| CN113968150A (en) * | 2020-07-22 | 2022-01-25 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Non-contact power supply system for magnetic suspension train and magnetic suspension train |
| CN112519590B (en) * | 2020-12-03 | 2022-07-05 | 北京磁浮交通发展有限公司 | Magnetic-levitation train and vehicle grounding system thereof |
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