CN110768357B - Power supply system for rail vehicle - Google Patents
Power supply system for rail vehicle Download PDFInfo
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- CN110768357B CN110768357B CN201810848008.1A CN201810848008A CN110768357B CN 110768357 B CN110768357 B CN 110768357B CN 201810848008 A CN201810848008 A CN 201810848008A CN 110768357 B CN110768357 B CN 110768357B
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- Prior art keywords
- power supply
- controllable switch
- rail vehicle
- platform
- charging
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C3/00—Electric locomotives or railcars
- B61C3/02—Electric locomotives or railcars with electric accumulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
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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
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
Abstract
The invention provides a power supply system of a rail vehicle, comprising: the power battery is arranged on the railway vehicle; the first controllable switch is connected between the current taker of the rail vehicle and the power supply end of the rail vehicle in series; the solar power supply device is arranged on the rail vehicle; the second controllable switch is connected between the solar power supply device and the power supply end of the railway vehicle in series; the platform charging device is arranged at the charging platform, one end of the platform charging device is connected with the commercial power grid, and the other end of the platform charging device is used for connecting the current collector when the rail vehicle stops at the charging station; and the control device is used for controlling the first controllable switch and the second controllable switch to be switched on and off. This power supply system can not only charge for power battery through platform charging device, can also charge for power battery through solar energy power supply unit, can alleviate rail vehicle's power consumption pressure from this, and the energy saving.
Description
Technical Field
The invention relates to the technical field of power supply of rail vehicles, in particular to a power supply system of a rail vehicle.
Background
At present, photovoltaic is gradually recognized and popularized as a clean energy source. Compared with other energy sources, photovoltaic technology has many advantages: mechanical operation parts required by thermal power generation, hydroelectric power generation and the like are not required; except sunshine, no other fuel is needed; solar energy is renewable without any pollution, etc.
In recent years, the development of the rail transit technology in China is rapid, most rail vehicles (such as high-speed rails, Yunba and the like) are applied outdoors, and almost no or few shelters exist, so that good conditions are created for solar photovoltaic power generation.
Therefore, how to combine solar photovoltaic power generation with rail transit construction and provide electric energy for rail transit engineering by using solar energy is significant in energy saving and has important reference significance for guiding new rail transit engineering.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the invention aims to provide a power supply system of a railway vehicle, which is used for solving the problems of insufficient platform charging or large power consumption demand of the railway vehicle and is environment-friendly and energy-saving.
To achieve the above object, an embodiment of the present invention provides a power supply system for a rail vehicle, including: the power battery is arranged on the rail vehicle, connected with the power supply end of the rail vehicle and used for supplying power to a whole vehicle power system of the rail vehicle; a first controllable switch connected in series between a current collector of the rail vehicle and a power supply terminal of the rail vehicle; a solar power supply device disposed on the rail vehicle; a second controllable switch connected in series between the solar power supply and the power supply terminal of the rail vehicle; the platform charging device is arranged at a charging platform, one end of the platform charging device is connected with a commercial power grid, and the other end of the platform charging device is used for connecting the current collector when the rail vehicle stops at the charging platform; and the control device is used for controlling the first controllable switch and the second controllable switch to be switched on and off, wherein when the first controllable switch is switched off, the power battery is charged through the platform charging device, and when the second controllable switch is switched off, the power battery is charged through the solar power supply device.
According to the power supply system of the railway vehicle, when the first controllable switch is closed, the power battery can be charged through the platform charger, and when the second controllable switch is closed, the power battery can be charged through the solar power supply device arranged on the railway vehicle. Therefore, the solar power supply device can help solve part of power utilization requirements of the rail vehicle, the problem that the platform is not charged enough or the power utilization requirement of the rail vehicle is large is solved, and the solar power supply device is environment-friendly and saves energy
In addition, the power supply system of the rail vehicle according to the above-described embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the invention, the solar power supply apparatus comprises: a solar panel; one end of the DC-DC converter is connected with the solar panel, and the other end of the DC-DC converter is connected with the power supply end of the rail vehicle through the first controllable switch.
According to one embodiment of the invention, the solar panels are laid on the top or on the sides of the rail vehicle.
According to an embodiment of the present invention, the station charging apparatus includes: the platform charger is connected with the commercial power grid at one end; and the charging groove is connected with the other end of the platform charger and is used for connecting the current collector when the railway vehicle stops at the charging station platform.
According to an embodiment of the present invention, when the rail vehicle stops at the charging station, the platform charging device starts and starts a self-test to determine whether the platform charging device has a fault, wherein the control device is specifically configured to control the second controllable switch to be closed to charge the power battery through the solar power supply device when the platform charging device has a fault, and control the first controllable switch to be closed to charge the power battery through the platform charging device when the platform charging device is normal.
According to an embodiment of the present invention, in the charging process of the platform charging device to the power battery, the control device is further configured to: when the railway vehicle sends a platform charging stopping command, controlling the first controllable switch to be switched off, and acquiring the current State of Charge (SOC) of the power battery; and if the SOC is smaller than a preset value, controlling the second controllable switch to be closed so as to continuously charge the power battery through the solar power supply device.
According to an embodiment of the invention, the control device is further configured to control the second controllable switch to be closed when the power battery fails, so as to supply power to a vehicle electric system of the rail vehicle through the solar power supply device.
According to an embodiment of the invention, the power supply system further comprises: a third controllable switch connected in series between the DC-DC converter and a low voltage power distribution device of the rail vehicle; the control device is further connected with the control end of the third controllable switch and used for controlling the third controllable switch to be switched on and switched off.
According to one embodiment of the invention, the control device is further configured to control the third controllable switch to close when a traction motor of the rail vehicle fails, so as to supply power to the lighting and low-voltage power system of the rail vehicle through the solar power supply device.
According to an embodiment of the invention, the power supply system further comprises: the solar charging device is arranged at the charging platform; a fourth controllable switch connected in series between the solar charging device and the charging slot; the control device is further connected with the control end of the fourth controllable switch and used for controlling the fourth controllable switch to be switched on and switched off.
According to one embodiment of the invention, the first controllable switch is linked to the second controllable switch such that the first controllable switch and the second controllable switch are not closed at the same time.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a block schematic diagram of a power supply system for a rail vehicle according to one embodiment of the present invention;
FIG. 2 is a block schematic diagram of a power supply system for a rail vehicle according to one particular embodiment of the present invention;
FIG. 3 is a schematic block diagram of a power supply system for a rail vehicle according to one embodiment of the present invention;
FIG. 4 is a schematic diagram of a location of a solar panel according to one embodiment of the invention;
FIG. 5 is a block schematic diagram of a power supply system for a rail vehicle according to another embodiment of the present invention;
fig. 6 is an operational flow diagram of a power supply system for a rail vehicle according to one embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A power supply system for a railway vehicle according to an embodiment of the present invention will be described with reference to fig. 1 to 6.
As shown in fig. 1, the power supply system 100 for a railway vehicle includes: a power battery 220, a first controllable switch 110, a solar power supply device 120, a second controllable switch 130, a platform charging device 140 and a control device 150.
Referring to fig. 1, a power battery 220 is disposed on a rail vehicle 200, and the power battery 220 is connected to a power supply terminal a of the rail vehicle 200 and is used for supplying power to a complete vehicle power system of the rail vehicle 200. The first controllable switch 110 is connected in series between the current taker 210 of the rail vehicle 200 and the supply terminal a of the rail vehicle 200. The solar power supply device 120 is provided on the railway vehicle 200. The second controllable switch 130 is connected in series between the solar power supply 120 and the power supply terminal a of the rail vehicle 200. The platform charging device 140 is disposed at a charging platform, one end of the platform charging device 140 is connected to the utility grid 300, and the other end of the platform charging device 140 is used for connecting the current collector 210 when the rail vehicle 200 stops at the charging platform. The control device 150 is connected to the control terminal of the first controllable switch 110 and the control terminal of the second controllable switch 130, respectively, for controlling the on and off of the first controllable switch 110 and the second controllable switch 130. Wherein, when the first controllable switch 110 is closed, the power battery 220 is charged by the station charging device 140, and when the second controllable switch 130 is closed, the power battery 220 is charged by the solar power supply device 120
In this embodiment, the solar power supply 120 is used for generating electric energy by using solar energy and converting the electric energy into direct current required for charging the power battery 220. In addition, in order to facilitate the charging of the power battery 220, a charging platform may be provided at a station where the railway vehicle 200 may be parked.
It should be appreciated that the first controllable switch 110, the second controllable switch 130, and the control device 150 described above may all be provided on the rail vehicle 200 for ease of control.
In one embodiment of the present invention, as shown in fig. 1-3, the solar power supply device 120 is connected in parallel with the platform charging device 140. When the utility grid normally uses electricity, electricity can be obtained from the 10kV utility grid 300, 380V alternating current is output after passing through a step-down transformer substation, and then the alternating current is introduced into an alternating current low-voltage switch cabinet. The switch cabinet introduces a part of input 380V alternating current into a station of the railway vehicle 200 to supply power for systems such as station illumination, air conditioning and signals; the other part is distributed to the platform charging device 140, and converted into 640V dc power by the platform charging device 140, and when the rail vehicle 200 stops at the charging platform and the control device 150 controls the first controllable switch 110 to be closed, the platform charging device 140 charges the power battery 220. When the rail vehicle 200 is traveling on the track, the control device 150 may control the second controllable switch 130 to be closed, so that the solar power supply device 120 charges the power battery 220.
It should be noted that the power supply system 100 is mainly suitable for a rail vehicle running outdoors without shading, such as a baboon. The Yunba generally adopts an independent elevated road right, the road surface is high, excessive shielding of high-rise buildings is avoided, and sunlight irradiation is sufficient.
Therefore, the power supply system of the railway vehicle can help solve part of power utilization requirements of the railway vehicle through the solar power supply device, the problem that the platform is not charged enough or the power utilization requirement of the railway vehicle is large is solved, and the power supply system is environment-friendly and energy-saving.
In one embodiment of the present invention, as shown in fig. 2, the platform charging device 140 includes a platform charger 141 and a charging slot 142.
One end of the platform charger 141 is connected to the utility grid 300, and the other end of the platform charger 141 is connected to the charging slot 142; the charging slot 142 is used to connect the current collector 210 when the rail vehicle 200 is parked at the charging station. In this embodiment, the extractor 210 may be a charging blade, and the connection of the charging blade to the charging slot 142 may be configured as a plug.
In one embodiment of the present invention, when the rail vehicle 200 is parked at the charging station, the station charging device 140 starts and starts a self-test to determine whether there is a malfunction of the station charging device 140. In this embodiment, the control device 150 is specifically configured to control the second controllable switch 130 to be closed when the platform charging device 140 has a fault, so as to charge the power battery 220 through the solar power supply device 120, thereby playing an emergency role and ensuring the normal operation of the rail vehicle. When the platform charging device 140 is normal, the control device 150 may control the first controllable switch 110 to be closed, so as to charge the power battery 220 through the platform charging device 140.
The control device 150 and the platform charger 141 are connected in communication, such as wireless communication, so that the control device 150 can obtain the self-test result of the platform charging device 140.
Specifically, the positioning device on the rail vehicle 220 may detect the position information of the rail vehicle 200 in real time, and send the position information to the vehicle control unit, and the vehicle control unit determines whether the rail vehicle stops at the charging station according to the position information, and if the position information received for a preset time (which may be 3 times) is the same as the position of the charging station, determines that the rail vehicle stops at the charging station. At this time, the current collector 210 may be connected to the platform charging device 140, so that the platform charging device 140 starts and starts a self-test to determine whether there is a fault in the platform charging device 140.
If the platform charging device 140 has no problem in self-checking, handshake information between the platform charging device 140 and the rail vehicle 200 is generated and sent to the vehicle control unit, and the vehicle control unit can control the first controllable switch 110 to be closed through the control device 150, so as to charge the power battery 220 through the platform charging device 140; if the vehicle control unit does not receive the handshake information within 2s at the preset time, it indicates that the platform charging device 140 has a fault, and the vehicle control unit controls the second controllable switch 130 to be closed through the control device 150, so as to charge the power battery 220 through the solar power supply device 120. Of course, the solar power supply device 120 can also supply power to the electric system of the whole vehicle while charging the power battery 220.
Further, in the process that the platform charging device 140 charges the power battery 220, the control device 150 is further configured to control the first controllable switch 110 to be turned off and obtain the current state of charge SOC of the power battery 220 when the railway vehicle 200 issues a command to stop platform charging; and if the SOC is smaller than the preset value, controlling the second controllable switch 130 to be closed so as to continuously charge the power battery 220 through the solar power supply device 120.
The preset values corresponding to the charging stations may be the same, such as 50%, or different, and when the preset values corresponding to the charging stations are different, the preset values may be set according to the remaining target mileage of the rail vehicle 200, for example, as soon as the rail vehicle 200 that will complete the driving target of the current day, the preset value at the 4 th last station may be a1, the preset value at the 3 rd last station may be a2, and the preset value at the 2 nd last station may be a3, where a1 > a2 > a 3. Alternatively, a1, a2, a3 may all enable the rail vehicle 200 to travel to the terminal.
It should be understood that the rail vehicle 200 stops at each charging station for a short time due to the traffic volume, how much rail vehicle is running on the line, etc., thereby possibly resulting in the insufficient charging of the power battery 220 by the station charging device 140.
Specifically, in the process that the railway vehicle 200 stops at the charging station and the platform charging device 140 charges the power battery 220, when the stop time of the railway vehicle 200 reaches a predetermined time, the railway vehicle 200 will issue a platform charging stop command, and the control device 150 may control the first controllable switch 110 to be turned off to stop the platform charging. Meanwhile, the current state of charge SOC of the power battery 220 is obtained, and if the SOC is smaller than the preset value, the control device 150 may control the second controllable switch 130 to be closed, so as to continue to charge the power battery 220 through the solar power supply device 120, and simultaneously drive traction.
In this embodiment, the Control device 150 may be connected to a battery management unit of the rail vehicle 200 (e.g., connected via a CAN (Control Area Network) bus) to obtain operating parameters (including SOC), operating status, and the like of the power battery 220.
It should be understood that the battery Management unit, such as bms (battery Management system), is used to manage the power battery 220, including detecting the state of the power battery 220, the distribution of electric energy, and the like. The power battery 220 failure may include a power shortage, a BMS failure, and the like.
Furthermore, the control device 150 is further configured to control the second controllable switch 130 to be closed when the power battery 220 fails, so as to supply power to the entire electric system of the rail vehicle 200 through the solar power supply device 120, thereby enabling the rail vehicle 200 to travel a longer distance, and ensuring that the rail vehicle 200 reaches the destination to a certain extent.
In this example, referring to fig. 3, the entire electric system of the rail vehicle 200 includes a front traction inverter assembly, a rear traction inverter assembly, a DC-DC converter assembly, an air conditioning assembly, a battery cooling assembly, and a lighting and low voltage electric system, wherein the lighting and low voltage electric system may be distributed by a low voltage distribution cabinet.
Alternatively, referring to fig. 3, a fuse FU1 may be connected in series in the loop of the first controllable switch 110 to protect the loop.
Similarly, a fuse FU2 can be connected in series in the circuit in which the second controllable switch 130 is located to protect the circuit.
In one embodiment of the present invention, the first controllable switch 110 and the second controllable switch 130 are linked such that the first controllable switch 110 and the second controllable switch 130 are not closed at the same time. It should be understood that in this embodiment, the control device 150 may be connected to the control terminal of only one of the first controllable switch 110 and the second controllable switch 130.
Alternatively, the first controllable switch 110 and the second controllable switch 130 may both be contactors.
Specifically, the control device 150 is connected to only the control terminal of the second controllable switch 130. When the rail vehicle 200 is running on the rail, the control device 150 controls the second controllable switch 130 to be closed, at this time, the first controllable switch 110 is opened, and the solar power supply device 120 charges the power battery 220. When the rail vehicle 200 reaches the charging station, the control device 150 controls the second controllable switch 130 to be turned off, and at this time, the first controllable switch 110 is turned on, and the station charger 141 charges the power battery 220.
In one embodiment of the present invention, as shown in fig. 3, the solar power supply 120 includes a solar panel 121 and a DC-DC converter 122.
Referring to fig. 3, one end of the DC-DC converter 122 is connected to the solar cell panel 121, and the other end of the DC-DC converter 122 is connected to the power supply terminal a of the rail vehicle 200 through the first controllable switch 110. The solar panel 121 absorbs solar energy to generate electric energy, and the DC-DC converter 122 converts the electric energy into direct current required for charging the power battery 220.
Since the voltage generated by the solar panel 121 is very high when it is exposed to strong sunlight, it may cause unstable voltage and loss of high line voltage, and thus the power battery 220 cannot be charged directly. Therefore, by connecting the DC-DC converter 122 between the solar cell panel 121 and the power supply terminal a in series, it is possible to reduce the high voltage loss of the line, provide a stable voltage for the rail vehicle 200, to charge the power battery 220 after the second controllable switch 130 is closed, and/or to supply power to the entire power system of the rail vehicle 200.
In one example, as shown in fig. 4, the solar panel 121 may be laid on top of a rail vehicle 200. For example, the solar panel 121 is fixed on the top of the rail vehicle 200 in a flat manner, so that the solar panel 121 can be ensured to receive the irradiation of sunlight in the largest area, and the solar energy is converted into electric energy; meanwhile, the horizontally-arranged mode also reduces the resistance of the solar cell panel 121 to the running of the rail vehicle 200 as much as possible.
Alternatively, the solar cell panel 121 may be laid on the side of the rail vehicle 200, may be laid on one side, or may be laid on both sides. The solar cell panel 121 may also be laid on the top and sides of the rail vehicle 200, for example, the top and left/right sides, the top and both sides, simultaneously.
It should be appreciated that the solar cell panel 121 is laid on the top of the rail vehicle 200, so that the solar cell panel is more convenient to install and use and has better power generation effect than the solar cell panel. To facilitate the laying of the solar cell panel 121, the solar cell panel 121 may employ a flexible solar cell panel.
It should be noted that, when the solar cell panel 121 is laid on the top and/or the side of the rail vehicle 200, it may be laid around the entire vehicle, for example, the top of the entire vehicle; alternative paving is also possible, for example, when the rail vehicle 200 includes multiple cars, one car may be selected for paving. Of course, the arrangement mode and the arrangement position of the solar cell panel 121 on the rail vehicle 200 are not limited thereto, for example, the solar cell panel 121 may also be laid on a mounting plate, the mounting plate may be fixed on the top of the rail vehicle 200 and may rotate relative to the rail vehicle 200, and the rotation may be implemented by the control device 150 controlling the actuator, so that the control device 150 may control the actuator to drive the mounting plate to rotate as required, so as to rotate the solar cell panel 121 to face the sunlight, so as to increase the light-sensing area of the solar cell panel 121.
Further, in one embodiment of the present invention, as shown in fig. 3, the power supply system 100 further comprises a third controllable switch 160. The third controllable switch 160 is connected in series between the DC-DC converter 122 and the low voltage distribution device 230 of the rail vehicle 200. In this embodiment, the control device 150 is further connected to a control terminal of the third controllable switch 160 for controlling the third controllable switch 160 to be turned on and off.
Wherein the third controllable switch 160 may be a contactor.
In particular, with reference to fig. 3, the low-voltage distribution device 230 comprises a low-voltage distribution cabinet 231 and a low-voltage DC-DC converter 232. When the control device 150 controls the third controllable switch 160 to be closed, the solar panel 121 can transmit the electric energy to the low-voltage DC-DC converter 232 through the DC-DC converter 142, and supply the low-voltage (such as 24V, 110V, etc.) direct current to the low-voltage power distribution cabinet 231 after the DC-DC conversion, so as to provide the electric energy for the lighting and low-voltage power system on the whole vehicle.
Alternatively, referring to fig. 3, a fuse FU3 may be connected in series in the loop of the third controllable switch 160 to protect the loop.
In one example, the control device 150 is further configured to control the third controllable switch 160 to close to supply power to the lighting and low-voltage power system of the rail vehicle 200 through the solar power supply device 120 when the traction motor of the rail vehicle 200 fails, that is, the rail vehicle 200 cannot run, so that the lighting and low-voltage power system of the rail vehicle 200 can be kept working normally, and passengers are not panic to wait for rescue. In this example, the control device 150 may communicate with a vehicle control unit to obtain the operating state of the traction motors, optionally the control device 150 may be integrated into the vehicle control unit.
It should be noted that, referring to fig. 3, a contactor KM3 may be connected between the entire vehicle power system of the rail vehicle 200 and the power battery 220, and the contactor KM3 is controlled by the entire vehicle controller, so that, after the traction motor fails, the entire vehicle controller may not pull the contactor KM3 before the traction motor recovers, that is, the power battery 220 and the solar power supply device 120 may not supply power to the entire vehicle power system through the power supply terminal a, in order to reduce the damage to the electrical components in the entire vehicle power system of the rail vehicle 200. At this time, the control device 150 may control the third controllable switch 160 to be closed to supply power to the low voltage power distribution device 230 through the solar power supply device 120.
Of course, the third controllable switch 160 may also be controlled manually, i.e. the on-board personnel may close the third controllable switch 160 as desired.
In one embodiment of the present invention, as shown in fig. 5, the power supply system 100 further comprises a solar charging device 170 and a fourth controllable switch 180. The solar charging device 170 is disposed at a charging station and the fourth controllable switch 180 is connected in series between the solar charging device 170 and the charging slot 142. In this embodiment, the control device 150 is further connected to a control terminal of the fourth controllable switch 180 for controlling the fourth controllable switch 180 to be turned on and off.
Wherein, the fourth controllable switch 180 may adopt a contactor.
Specifically, the solar charging device 170 may also include a solar panel and a DC-DC converter, and the solar panel is disposed on the top surface of the charging station. When the rail vehicle 200 stops at the charging slot 142 of the platform charging device 140 and the platform charger 141 and the solar power supply device 120 fail, the control device 150 may control the fourth controllable switch 180 to close to charge the power battery 220 through the solar charging device 170. It should be noted that the charging station is generally provided with a ceiling, and the solar panel of the solar charging device 170 can be provided on the ceiling (i.e. the top surface).
In addition, it should be noted that, in order to ensure better power supply of the solar power supply device 120, an energy storage module may be further disposed in the solar power supply device 120, and is used for storing electric energy generated by the solar cell panel 121. As a result, the electric energy stored in the energy storage module can be supplied to the rail vehicle 200 when required.
Similarly, an energy storage module may be disposed in the solar charging device 170. Optionally, the solar charging device 170 may also establish a connection with a power utilization system of a station of the railway vehicle to supply power by systems for lighting, air conditioning, and signals of the station.
The operation principle of the power supply system for a rail vehicle will be described below with reference to fig. 6, taking the power supply system for a rail vehicle shown in fig. 3 as an example:
as shown in fig. 3 and 6, after the rail vehicle arrives at the station, if the charging blade contacts with the charging slot, the platform charger is started, the contactors KM1 and KM2 in fig. 3 are closed, and the platform charger starts self-checking. If the self-checking is problematic, the platform charger sends fault information to the control device, the control device controls the second controllable switch to be closed, the vehicle control unit controls the traction contactor KM3 and the battery discharge contactor KM9 to be closed, and the solar power supply device supplies power to drive the train to traction and charges the power battery at the same time.
And if the self-checking is not problematic, judging whether the communication connection between the railway vehicle and the platform charger is successful. And if the communication is successful, the successful communication information is fed back to the vehicle control unit, so that the vehicle control unit receives battery information sent by the BMS, wherein the battery information comprises battery voltage, electric quantity, allowable charging state, maximum charging power and the like. Further, after the platform charger receives a charging permission command sent by the BMS through the vehicle control unit, the control device controls the first controllable switch to be closed to start charging. If the platform charger does not receive the 'charging permission' command within a certain time, the fault of the BMS is judged, the control device controls the second controllable switch and the KM3 to be closed, and the solar power supply device drives the train to pull.
In the charging process of the power battery, if the BMS receives an off-station message sent by the vehicle controller before the power battery is fully charged, the BMS sends a charging stopping command to the platform charger through the vehicle controller. Otherwise, the BMS determines whether to send a 'stop charging' command according to the battery state. When the platform charger receives the 'stop charging' command, the control device controls the first controllable switch to be disconnected to stop the platform charging.
When the SOC of the power battery is higher than 50% in the use process of the power battery, the battery discharging contactor KM9 and the traction contactor KM3 are kept in a closed state, and power is supplied by the power battery to drive the train to traction. When the SOC of the power battery is lower than 50%, the control device controls the second controllable switch to be closed, the vehicle control unit controls the traction contactor KM3 to be closed, and the solar power supply device supplies power to drive the train to traction. If the whole vehicle traction fails at the same time, or the power battery failure and the whole vehicle traction failure occur at the same time, the control device controls the third controllable switch to be closed, so that the normal work of the lighting and low-voltage power utilization system is ensured, and the rescue is waited.
In summary, according to the power supply system of the rail vehicle provided by the embodiment of the invention, the solar power supply device can help solve a part of power consumption requirements of the rail vehicle, and alleviate the problems of insufficient charging at a platform or large power consumption requirements of the rail vehicle, and the power supply system is environment-friendly and saves energy.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. A power supply system for a rail vehicle, comprising:
the power battery is arranged on the rail vehicle, connected with the power supply end of the rail vehicle and used for supplying power to a whole vehicle power system of the rail vehicle;
a first controllable switch connected in series between a current collector of the rail vehicle and a power supply terminal of the rail vehicle;
a solar power supply device disposed on the rail vehicle;
a second controllable switch connected in series between the solar power supply and the power supply terminal of the rail vehicle;
the platform charging device is arranged at a charging platform, one end of the platform charging device is connected with a commercial power grid, and the other end of the platform charging device is used for connecting the current collector when the rail vehicle stops at the charging platform;
a control device for controlling the first controllable switch and the second controllable switch to be turned on and off, wherein when the first controllable switch is turned off, the power battery is charged by the platform charging device, and when the second controllable switch is turned off, the power battery is charged by the solar power supply device;
when the rail vehicle is parked at the charging station, the station charging device starts and starts a self-test to determine whether the station charging device is malfunctioning, wherein,
the control device is specifically used for controlling the second controllable switch to be closed when the platform charging device has a fault so as to charge the power battery through the solar power supply device, and controlling the first controllable switch to be closed when the platform charging device is normal so as to charge the power battery through the platform charging device;
in the process that the platform charging device charges the power battery, the control device is further used for:
when the railway vehicle sends a platform charging stopping command, controlling the first controllable switch to be switched off, and acquiring the current state of charge (SOC) of the power battery, wherein when the parking time of the railway vehicle reaches the specified time, the platform charging stopping command is sent;
and if the SOC is smaller than a preset value, controlling the second controllable switch to be closed so as to continuously charge the power battery through the solar power supply device, wherein the preset value is positively correlated with the remaining target driving mileage of the railway vehicle.
2. The power supply system for railway vehicles according to claim 1, characterized in that the solar power supply device comprises:
a solar panel;
one end of the DC-DC converter is connected with the solar panel, and the other end of the DC-DC converter is connected with the power supply end of the rail vehicle through the first controllable switch.
3. The rail vehicle power supply system of claim 2, wherein the solar panel is laid on the top or on the side of the rail vehicle.
4. The rail vehicle power supply system according to claim 1, wherein the platform charging device includes:
the platform charger is connected with the commercial power grid at one end;
and the charging groove is connected with the other end of the platform charger and is used for connecting the current collector when the railway vehicle stops at the charging station platform.
5. The power supply system of the railway vehicle as claimed in claim 1, wherein the control device is further configured to control the second controllable switch to be closed when the power battery fails, so as to supply power to a complete vehicle power system of the railway vehicle through the solar power supply device.
6. The rail vehicle power supply system according to claim 2, further comprising:
a third controllable switch connected in series between the DC-DC converter and a low voltage power distribution device of the rail vehicle;
the control device is further connected with the control end of the third controllable switch and used for controlling the third controllable switch to be switched on and switched off.
7. The rail vehicle power supply system of claim 6, wherein the control device is further configured to control the third controllable switch to close to supply power to the lighting and low-voltage power system of the rail vehicle through the solar power supply device when a traction motor of the rail vehicle fails.
8. The rail vehicle power supply system according to claim 4, further comprising:
the solar charging device is arranged at the charging platform;
a fourth controllable switch connected in series between the solar charging device and the charging slot;
wherein the control device is further configured to control the fourth controllable switch to be turned on and off.
9. The rail vehicle power supply system of claim 1, wherein the first controllable switch is ganged with the second controllable switch such that the first controllable switch and the second controllable switch are not closed at the same time.
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| CN201810848008.1A CN110768357B (en) | 2018-07-27 | 2018-07-27 | Power supply system for rail vehicle |
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| CN201810848008.1A CN110768357B (en) | 2018-07-27 | 2018-07-27 | Power supply system for rail vehicle |
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| CN110768357B true CN110768357B (en) | 2021-11-12 |
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