CN112436499A - Train power supply control system, train power supply control method, controller and medium - Google Patents
Train power supply control system, train power supply control method, controller and medium Download PDFInfo
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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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/102—Parallel operation of dc sources being switching converters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/0315—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for using multiplexing techniques
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
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Abstract
The invention discloses a train power supply control system, a train power supply control method, a controller and a medium. The system comprises series power supply circuits arranged in at least two train carriages, each series power supply circuit comprises a DC-DC converter connected with a rail power supply system and at least one load connected with the DC-DC converter, and all the loads are electrically connected. The system can ensure that all loads on the rail train can work normally, effectively ensure the conversion efficiency of each DC-DC converter, reduce the loss of the DC-DC converters and effectively avoid the influence of the DC-DC converters with larger loss on the driving mileage and the battery capacity of the rail train.
Description
Technical Field
The invention relates to the technical field of power supply systems, in particular to a train power supply control system, a train power supply control method, a controller and a medium.
Background
The current urban rail transit comprises a train track and a rail train, wherein a track power supply system is configured on the train track, and a train power supply control system connected with the track power supply system is configured in the rail train so as to ensure the normal work of the rail train. In the current train power supply control system, as shown in fig. 1, each car of a rail train is provided with a DC-DC converter and at least one load connected in series with the DC-DC converter, the loads in all the cars are electrically connected, and the storage battery is one of the loads. The train power supply control system enables the loss of the DC-DC converter to be large under the working condition that the load of the load is small, and the conversion efficiency is low.
Disclosure of Invention
The embodiment of the invention provides a train power supply control system, a train power supply control method, a controller and a medium, and aims to solve the problems that a DC-DC converter in the existing train power supply control system is large in loss and low in conversion efficiency.
The train power supply control system comprises series power supply circuits arranged in at least two train carriages, wherein each series power supply circuit comprises a DC-DC converter connected with a track power supply system and at least one load connected with the DC-DC converter, all the loads are electrically connected, the train control system also comprises a whole train controller connected with all the loads and at least one DC-DC converter, and the whole train controller is used for collecting the total power of the loads corresponding to all the loads, determining the target number corresponding to the DC-DC converters according to the total power of the loads and controlling the DC-DC converters corresponding to the target number to supply power to all the loads.
A train power supply control method comprises the following steps executed by a vehicle control unit:
acquiring load power corresponding to all loads, and determining the total load power;
determining a target number corresponding to the DC-DC converter based on the total load power and the rated power corresponding to the DC-DC converter;
and controlling the DC-DC converters corresponding to the target number to supply power to all the loads.
The vehicle control unit comprises a memory, a processor and a computer program which is stored in the memory and can run on the processor, wherein the processor realizes the train power supply control method when executing the computer program.
A computer-readable storage medium storing a computer program which, when executed by a processor, implements the above-described train power supply control method.
According to the train power supply control system, the train power supply control method, the controller and the medium, each DC-DC converter is connected with at least one load, and all the loads in at least two train carriages are electrically connected, so that each DC-DC converter can supply power to all the loads on the rail train, and technical support is provided for supplying power to all the loads by adopting the DC-DC converters corresponding to the target number. The vehicle control unit determines the target number corresponding to the DC-DC converters to be controlled according to the load total power by adopting the load total power corresponding to all the loads, so that the DC-DC converters of the target number are controlled to convert high voltage into low voltage to supply power to all the loads in at least two train carriages, thereby not only ensuring that all the loads on the rail train can normally work, but also effectively ensuring the conversion efficiency of each DC-DC converter, reducing the loss of the DC-DC converters and avoiding the influence of the DC-DC converters with larger loss on the driving mileage and the battery capacity of the rail train.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic diagram of a prior art train power control system;
FIG. 2 is a schematic diagram of a train power control system according to an embodiment of the present invention;
FIG. 3 is a flowchart of a train power supply control method according to an embodiment of the present invention;
FIG. 4 is another flow chart of a train power control method according to an embodiment of the present invention;
FIG. 5 is another flow chart of a train power control method according to an embodiment of the present invention;
fig. 6 is another flowchart of a train power supply control method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 2 shows a schematic diagram of a train power supply control system according to an embodiment of the invention. As shown in fig. 2, the train power supply control system includes series power supply circuits arranged in at least two train cars, each series power supply circuit includes a DC-DC converter connected to the track power supply system and at least one load connected to the DC-DC converter, all the loads are electrically connected, and the train control system further includes a vehicle controller connected to all the loads and the at least one DC-DC converter, the vehicle controller is configured to collect total load power corresponding to all the loads, determine a target number corresponding to the DC-DC converter according to the total load power, and control the DC-DC converter corresponding to the target number to supply power to all the loads.
In fig. 2, the load on each railcar may include a battery disposed within the railcar. The track power supply system is a high-voltage power supply system and can output high voltage electricity; the load arranged in the train carriage is a low-voltage load, and the low-voltage load can be controlled to work according to the received low voltage; when the whole vehicle runs, all the DC-DC converters convert high-voltage electricity output by the rail power supply system into low-voltage electricity to supply power to all loads.
Specifically, each rail train comprises at least two train carriages, each train carriage comprises a series power supply circuit connected with a rail power supply system, and a DC-DC converter converts high voltage output by the rail power supply system into low voltage to supply power to a load connected with the DC-DC converter so as to enable the load in the train carriages to work. As shown in fig. 2, all the load electrical connections mean that all the loads in at least two train cars are electrically connected to each other, so that the DC-DC converter on each train car can supply power not only to at least one load in the train car of the train but also to at least one load in other train cars except the train car of the train, so that the DC-DC converter on any train car can supply power to all the loads on the whole rail train.
Under the condition that the DC-DC converter on any train carriage can supply power to all loads, and under the condition that all loads on the rail train are low, all the DC-DC converters work simultaneously, so that the loss of the DC-DC converters is large, the conversion efficiency is low, and when the rail train adopts a power supply scheme of supplying power by a storage battery and charging at an entrance, the DC-DC converter with large loss easily influences the driving mileage of the rail train and the battery capacity of the storage battery. In order to overcome the problem, in the present embodiment, all loads are connected to all DC-DC converters to collect the total load power required by all loads, which can be understood as the total power required to be supplied by all DC-DC converters. Because each DC-DC converter corresponds to a rated power, the target quantity corresponding to the DC-DC converters which need to supply power to all the loads can be determined according to the total load power corresponding to all the loads and the rated power corresponding to each DC-DC converter, and the target quantity corresponding to the DC-DC converters is the minimum quantity needed by supplying power to all the loads. And then, the vehicle control unit can randomly control the DC-DC converters corresponding to the target number to work so as to convert the high-voltage electricity output by the rail power supply system into low-voltage electricity capable of enabling the loads to work and supply power to all the loads on the rail train, so that the normal work of all the loads on the rail train is ensured. The DC-DC converters corresponding to the control target number are determined to work according to the total load power corresponding to all the loads, the high voltage electricity is converted into the low voltage electricity, and the power is supplied to all the loads on the rail train, so that the normal work of all the loads on the rail train can be guaranteed, the conversion efficiency of each DC-DC converter can be effectively guaranteed, the loss of the DC-DC converters is reduced, and the influence of the DC-DC converters with large loss on the driving mileage and the battery capacity of the rail train can be effectively avoided.
The target number can be the same as the total number corresponding to all the DC-DC converters in the train power supply control system, or can be different from the total number corresponding to all the DC-DC converters in the train power supply control system. In this embodiment, the vehicle control unit may adjust the target number corresponding to the DC-DC converters according to the total load power corresponding to all loads, and control the DC-DC converters corresponding to the target number to supply power to all loads on at least two train cars of the rail train, so as to adjust the working number of the DC-DC converters, and when the total load power is small, reduce the target number corresponding to the DC-DC converters, so that the DC-DC converters in the working state are in a medium load state or a large load state, so as to reduce the loss of the DC-DC converters, and make the conversion efficiency higher. When the target number is smaller than the number of the compartments of the whole vehicle, the DC-DC converters corresponding to the target number are controlled to supply power to all the loads, so that part of the DC-DC converters do not need to supply power to all the loads, the useless loss of the part of the DC-DC converters can be reduced, and the purpose of saving the electric energy loss is achieved. And when the target number is equal to the number of the compartments of the whole vehicle, controlling all the DC-DC converters to supply power to all the loads so as to ensure that all the loads can work normally.
In the train power supply control system provided by this embodiment, each DC-DC converter is electrically connected to all loads in at least two train cars, so that each DC-DC converter can supply power to all loads on a rail train, and a technical support is provided for supplying power to all loads by using DC-DC converters corresponding to a target number. The vehicle control unit determines the target number corresponding to the DC-DC converters to be controlled according to the load total power by adopting the load total power corresponding to all the loads, so that the DC-DC converters of the target number are controlled to convert high voltage into low voltage to supply power to all the loads in at least two train carriages, thereby not only ensuring that all the loads on the rail train can normally work, but also effectively ensuring the conversion efficiency of each DC-DC converter, reducing the loss of the DC-DC converters, and effectively avoiding the influence of the DC-DC converters with larger loss on the driving mileage and the battery capacity of the rail train.
Fig. 3 shows a schematic diagram of a train power supply control system according to an embodiment of the invention. As shown in fig. 3, the train power supply control system further includes at least one relay connected to the vehicle controller, each relay is used for controlling at least one load in two adjacent train cars to be turned on or off, and the vehicle controller controls at least one relay to be turned on or off simultaneously according to the target number and controls the DC-DC converters corresponding to the target number to supply power to all the loads.
In the train power supply control system shown in fig. 3, a relay is arranged between any two adjacent train carriages, and each relay is connected with the vehicle control unit and used for controlling all loads in the two adjacent train carriages to be switched on or off under the control of the vehicle control unit. As an example, when at least one load in two adjacent train cars is controlled to be turned on by a relay, all the loads in the two adjacent train cars can be electrically connected with each other, so that any one DC-DC converter in the two adjacent train cars can supply power to all the loads in the two adjacent train cars, and in order to realize that the DC-DC converter on any one train car can supply power to all the loads on the whole rail train. As another example, when the relay controls the disconnection of at least one load in two adjacent train cars, the DC-DC converter arranged in two adjacent train cars is enabled to supply power to at least one load connected with the same train car but not to at least one load on other train cars not connected with the same train car, so as to ensure the safety of the power supply process.
Since the target number is the minimum number required for ensuring normal operation of all loads, the target number may be the same as or different from the number of the entire vehicle compartments.
As an example, when the target number is smaller than the number of finished train cars, that is, when all DC-DC converters do not need to be controlled to operate, at this time, it needs to be ensured that the DC-DC converters corresponding to the randomly selected target number can supply power to all loads on the rail train, and therefore, the finished train controller needs to control at least one relay to be simultaneously turned on to ensure that the DC-DC converters corresponding to the target number can supply power to all loads, and ensure normal operation of the rail train. It can be understood that when the total load power is small, the target number corresponding to the DC-DC converters is smaller than the number of the compartments of the entire vehicle, so that the DC-DC converters in the working state are in the medium-load or large-load state, thereby reducing the loss of the DC-DC converters, and making the conversion efficiency higher, and also making part of the DC-DC converters not need to supply power to all the loads, and reducing the useless loss of the part of the DC-DC converters, so as to achieve the purpose of saving the power consumption.
As another example, when the target number is equal to the number of finished train cars, all the DC-DC converters need to be controlled to operate, and at this time, the finished train controller may control all the relays to be turned on simultaneously, so that all the DC-DC converters may supply power to all the loads on the rail train, so as to ensure normal operation of the rail train.
As another example, when the target number is equal to the number of train cars, the train controller may further control all the relays to be simultaneously turned off, so that each DC-DC converter individually supplies power to at least one load electrically connected to the same train car, thereby improving the safety of the power supply process of the train power supply control system and avoiding affecting the normal operation of other train cars when a certain train car fails during the process of supplying power to all the loads by all the DC-DC converters.
In an embodiment, as shown in fig. 4, a train power supply control method is provided, which is described by taking the train control method applied to the vehicle control unit shown in fig. 2 as an example, and includes the following steps:
s401: and acquiring load power corresponding to all loads, and determining the total load power.
In this embodiment, before the vehicle control unit connects the DC-DC converter to the track power supply system, so that the DC-DC converter converts the high voltage output by the track power supply system into low voltage, a power-on start self-test operation of the rail train is performed, so that a circuit path is formed between all loads in each train car of the rail train and the vehicle control unit, so as to determine all loads connected to the vehicle control unit. And then acquiring load power corresponding to all loads installed in at least two train carriages of the rail train. Then, the load powers corresponding to all the loads are summed to determine the total power of all the loads, i.e. PL＝∑Pi，PLFor total power of the load, PiThe load power corresponding to the ith load. The load power corresponding to the load is understood to be a rated power corresponding to the load, and the load power of the battery shown in fig. 2 is 24V.
Further, the vehicle control unit can also perform pre-charging processing before connecting the DC-DC converter with the rail power supply system to convert the high-voltage output by the rail power supply system into low-voltage power, particularly after completing the power-on starting self-checking operation of the rail train, wherein the pre-charging processing refers to performing high-voltage pre-charging on components connected with the rail power supply system to improve the voltage of the corresponding components so as to avoid the damage of the components caused by the instantly received high-voltage power, thereby achieving the purpose of protecting the components in the series power supply circuit in the train compartment. The vehicle control unit can pre-charge the components for connecting the rail power supply system and the DC-DC converter after completing the power-on starting self-checking operation of the rail train, so as to protect the components.
S402: and determining the target number corresponding to the DC-DC converter based on the total power of the load and the rated power corresponding to the DC-DC converter.
Since the total load power is the sum of the load powers of all the loads in the rail train, the total power required by the whole rail train can be understood. Each DC-DC converter in the rail train corresponds to a rated power, and for convenience of calculation, all DC-DC converters in the rail train may be configured as DC-DC converters of the same type, so that all DC-DC converters correspond to the same rated power, which may be understood as the power that each DC-DC converter can supply to all loads. After the total load power required by the whole railcar train and the rated power capable of being provided by each DC-DC converter are determined, the target number corresponding to the DC-DC converters required to supply power can be determined according to the supply and demand relationship, and the target number can be specifically the minimum number of the DC-DC converters required by the total load power.
S403: and controlling the DC-DC converters corresponding to the target number to supply power to all the loads.
Specifically, after the vehicle control unit determines the target number of the DC-DC converters required to work according to the total load power and each DC-DC converter, the DC-DC converters corresponding to the target number are randomly controlled to supply power to all loads on the rail train, and the target number is the minimum number of the DC-DC converters required for providing the total load power, so that all the loads on the rail train can be guaranteed to work normally, the conversion efficiency of each DC-DC converter is effectively guaranteed, and the loss of the DC-DC converters is reduced.
It can be understood that the target number corresponding to the DC-DC converter is the required minimum number, and the target number may be the same as the total number corresponding to all DC-DC converters in the train power supply control system, or may be different from the total number corresponding to all DC-DC converters in the train power supply control system, and since each train car is provided with one DC-DC converter, the total number corresponding to all DC-DC converters is equal to the number of whole train cars.
In this embodiment, the vehicle controller may adjust the target number corresponding to the DC-DC converters according to the total load power corresponding to all loads, and control the DC-DC converters corresponding to the target number to supply power to all loads, so as to adjust the working number of the DC-DC converters, when the total load power is small, the target number corresponding to the DC-DC converters is reduced, so that the target number is smaller than the number of compartments of the vehicle, and the DC-DC converters in the working state are in a medium-load or large-load state, so as to reduce the loss of the DC-DC converters, so that the conversion efficiency is high, and also so that part of the DC-DC converters do not need to supply power to all loads, and the useless loss of the part of the DC-DC converters can be reduced, so as to achieve the purpose of saving power. And when the target number is equal to the number of the compartments of the whole vehicle, controlling all the DC-DC converters to supply power to all the loads so as to ensure that all the loads can work normally.
In the train power supply control method provided by the embodiment, the total load power corresponding to all the loads is adopted, and the target number corresponding to the DC-DC converters to be controlled is determined according to the total load power, so that the DC-DC converters of the target number convert the high-voltage power output by the rail power supply system into the low-voltage power to supply power to all the loads in at least two train carriages, thereby not only ensuring that all the loads on the rail train can work normally, but also effectively ensuring the conversion efficiency of each DC-DC converter, reducing the loss of the DC-DC converters, and effectively avoiding the influence of the DC-DC converters with large loss on the driving mileage and the battery capacity of the rail train.
In an embodiment, as shown in fig. 5, step S402, namely determining the target number corresponding to the DC-DC converter based on the total power of the load and the rated power corresponding to the DC-DC converter, specifically includes the following steps:
s501: and acquiring a control ratio based on the quotient of the total load power and the rated power corresponding to the DC-DC converter.
S502: and carrying out upward rounding operation on the control ratio to determine the target quantity corresponding to the DC-DC converter.
Wherein the control ratio is a quotient of the total load power and the rated power of the DC-DC converter, and the target number is a value obtained by rounding up the control ratio, that is, the control ratio is
M is the target number, PLFor total power of the load, P0The rated power corresponding to the DC-DC converter.
Specifically, the vehicle control unit determines the target number corresponding to the DC-DC converters by performing upward rounding operation on the quotient of the total load power and the rated power, so that all loads on the rail train can be effectively ensured to work normally, the conversion efficiency of each DC-DC converter is effectively ensured, the loss of the DC-DC converters is reduced, and the influence of the DC-DC converters with large loss on the driving mileage and the battery capacity of the rail train can be effectively avoided.
For example, if the ratio is controlled
At this time, in order to ensure that all loads in the rail train can work normally, 1.5 or more DC-DC converters are needed for supplying power; obtained after rounding up the control ratio
Determining that the load requirements of all loads working normally can be met by adopting 2 DC-DC converters for power supply; when the 2 DC-DC converters are controlled to supply power to all loads, the conversion efficiency of the 2 DC-DC converters in the working state can be guaranteed, and the loss of other DC-DC converters which are not in the working state is effectively reduced.
In one embodiment, when the whole train of the rail train is designed, the total load power of all loads in the whole train is estimated, and a certain design margin is required to be reserved for all DC-DC converters in the rail train, so that the reliability of a train power supply control system is ensured. If at least one load connected with the DC-DC converter only comprises a 24V storage battery, when the DC-DC converter performs voltage conversion, a voltage larger than 24V low voltage electricity, such as 28V low voltage electricity, needs to be output to supply power to the 24V storage battery so as to ensure the reliability of power supply; in addition, when the margin design is carried out on the DC-DC converter, the margin of the DC-DC converter can be used for supplying power to the whole vehicle controller, and the whole vehicle controller does not need to be supplied with power by using a storage battery, so that the loss of the storage battery in the rail train is further reduced, and the service life of the storage battery is prolonged.
When the whole rail train is designed, a preset redundancy proportion is required to be set, and the method is used for solving the problem that the existing rail train is not suitable for the whole rail trainThe preset redundancy ratio is specifically the ratio of the total load power corresponding to all loads to the sum of the rated power corresponding to all DC-DC converters, i.e. the ratio
K is a predetermined redundancy ratio, PLFor total power of the load, P0The rated power corresponding to the DC-DC converter. Because the conversion efficiency of the DC-DC converter is related to the output power of the DC-DC converter, when the output power is lower, the DC-DC converter works in a hard switching state, the loss is higher, and the conversion efficiency is lower; when the output power is low, the DC-DC converter works in a soft switching state, the loss is low, and the conversion efficiency is high. In general design, 1/3 of rated power is set as a critical point of soft and hard switches in the DC-DC converter, so when the output power of the DC-DC converter is greater than 1/3 rated power, the conversion efficiency is high, and therefore, the minimum value of the preset redundancy ratio is 1/3. When the whole rail train is designed, the maximum value of the preset redundancy proportion can be set according to actual requirements. Experiments prove that when the preset redundancy ratio is set to be between 0.4 and 0.8, the conversion efficiency of the DC-DC converter in the rail train is high, and the system can be guaranteed to have enough design margin.
Correspondingly, in the case that the rail train has a design margin, as shown in fig. 6, step S402, namely obtaining a control ratio based on the total load power and the rated power corresponding to the DC-DC converter, specifically includes the following steps:
s601: and determining the redundancy power corresponding to the DC-DC converter according to the product of the rated power corresponding to the DC-DC converter and the preset redundancy ratio.
S602: and acquiring a control ratio based on the quotient of the total load power and the corresponding redundant power of the DC-DC converter.
S603: and carrying out upward rounding operation on the control ratio to determine the target quantity corresponding to the DC-DC converter.
The redundancy power is the product of rated power of the DC-DC converter and a preset redundancy ratio, the control ratio is the quotient of the total load power and the redundancy power corresponding to the DC-DC converter, and the target quantity is a value obtained after the control ratio is rounded upI.e. by
M is the target number, PLFor total power of the load, P0For rated power corresponding to the DC-DC converter, K is a preset redundancy ratio, KP0Is redundant power.
The target number determined in the steps S601 to S603 enables all loads on the rail train to work normally, and can effectively ensure the conversion efficiency of each DC-DC converter, reduce the loss of the DC-DC converter, and effectively avoid the influence of the DC-DC converter with large loss on the driving mileage and the battery capacity of the rail train, and also ensure the reliability of normal operation due to the design margin provided on the rail train, in the process of subsequently controlling the DC-DC converters corresponding to the target number to supply power to all loads based on the target number.
For example, if the redundancy ratio K is 0.8
It means that 2 DC-DC converters can be used to supply power to all loads, so as to improve the conversion efficiency of the 2 DC-DC converters supplying power to all loads; the load requirement of normal work of all loads can be met, the design allowance is arranged on the rail train, the reliability of normal work of 2 DC-DC converters can be guaranteed, the conversion efficiency of each DC-DC converter is effectively guaranteed, and the loss of the DC-DC converters is reduced.
In an embodiment, a train power supply control method is provided, and is applied to a vehicle control unit corresponding to the train power supply control system shown in fig. 3, where the controlling of the DC-DC converters corresponding to the target number in step S403 supplies power to all loads, and specifically includes the following steps: and if the target number is smaller than the number of the compartments of the whole vehicle, controlling all the relays to be simultaneously conducted, and controlling the DC-DC converters corresponding to the target number to supply power to all the loads.
In the train power supply control system shown in fig. 3, a relay is arranged between any two adjacent train carriages, and each relay is connected with the vehicle control unit and used for controlling all loads in the two adjacent train carriages to be switched on or off under the control of the vehicle control unit. As an example, when at least one load in two adjacent train cars is controlled to be turned on by a relay, all the loads in the two adjacent train cars may be electrically connected to each other, so that the two DC-DC converters in the two adjacent train cars may each supply power to all the loads in the two train cars, and in order to realize that the DC-DC converter on any one train car may supply power to all the loads on the whole rail train. As another example, when the relay controls the disconnection of at least one load in two adjacent train cars, the DC-DC converter arranged in two adjacent train cars is enabled to supply power to at least one load connected with the same train car but not to at least one load on other train cars not connected with the same train car, so as to ensure the safety of the power supply process.
In this embodiment, when the target number is smaller than the number of finished train cars, that is, when all the DC-DC converters do not need to be controlled to operate, it is required to ensure that the randomly selected DC-DC converters corresponding to the target number can supply power to all the loads on the rail train, and therefore, the finished train controller needs to control at least one relay to be simultaneously turned on to ensure that the DC-DC converters corresponding to the target number can supply power to all the loads, and ensure normal operation of the rail train. It can be understood that when the total load power is small, the target number corresponding to the DC-DC converters is smaller than the number of the compartments of the entire vehicle, so that the DC-DC converters in the working state are in the medium-load or large-load state, thereby reducing the loss of the DC-DC converters, and making the conversion efficiency higher, and also making part of the DC-DC converters not need to supply power to all the loads, and reducing the useless loss of the part of the DC-DC converters, so as to achieve the purpose of saving the power consumption.
In another embodiment, a train power supply control method is provided, and is applied to a vehicle control unit corresponding to the train power supply control system shown in fig. 3, where the controlling of the DC-DC converters corresponding to the target number in step S403 supplies power to all loads, and specifically includes the following steps: and if the target number is equal to the number of the compartments of the whole vehicle, controlling all the relays to be switched off simultaneously, and controlling each DC-DC converter corresponding to the target number to supply power to at least one corresponding load.
As shown above, in the train power supply control system shown in fig. 3, a relay is arranged between any two adjacent train cars, and each relay is connected with the vehicle control unit and is used for controlling all loads in the two adjacent train cars to be switched on or off under the control of the vehicle control unit. As an example, when the target number is equal to the number of the train cars, the train controller controls all the relays to be simultaneously turned off, so that each DC-DC converter independently supplies power to at least one load electrically connected with the DC-DC converter, safety of a power supply process of the train power supply control system is improved, and normal operation of other train cars is prevented from being affected when a fault occurs in one train car in the process that all the DC-DC converters supply power to all the loads.
For example, when the rail train has a design margin, the preset redundancy ratio is set to be 0.8, and the total load power is set to be PLRated power P for DC-DC converter0And if the number N of the compartments of the whole vehicle is 8, the target number calculated by the whole vehicle controller
When the system is used, all relays are controlled to be conducted simultaneously, and 1 DC-DC converter is controlled randomly to supply power to all loads; in the calculated target number
When the system is used, all relays are controlled to be conducted simultaneously, and 2 DC-DC converters are controlled randomly to supply power to all loads; at the calculated target number
At the same time, all relays are controlled to be conducted simultaneously, and 3 DC-DC converters are randomly controlled to supply power … … to all loads in the calculated target quantity
When, the control stationThe relays are simultaneously turned off, so that 8 DC-DC converters respectively supply power to at least one load connected with the DC-DC converters in the same train carriage. In this embodiment, the target number corresponding to the DC-DC converter is smaller than the number of compartments of the entire vehicle, so that the DC-DC converter in the operating state is in a medium-load or large-load state to reduce the loss of the DC-DC converter, and the conversion efficiency is higher. When the target number is equal to the number of the carriages of the whole train, the whole train controller controls all the relays to be simultaneously switched off, so that each DC-DC converter independently supplies power to at least one load electrically connected with the DC-DC converter, and the safety of the power supply process of the train power supply control system is improved.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In an embodiment, a vehicle control unit is provided, which includes a memory, a processor, and a computer program stored on the memory and capable of running on the processor, and when the processor executes the computer program, the steps of the train power supply control method in the foregoing embodiments are implemented, for example, steps S401 to S403 shown in fig. 4 or steps shown in fig. 5 to 6, which are not repeated herein to avoid repetition.
In an embodiment, a computer-readable storage medium is provided, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the train power supply control method in the foregoing embodiment are implemented, for example, steps S401 to S403 shown in fig. 4 or steps shown in fig. 5 to fig. 6, and are not described herein again to avoid repetition.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. The train power supply control system is characterized by further comprising a vehicle control unit connected with all the loads and at least one DC-DC converter, wherein the vehicle control unit is used for collecting the total power of the loads corresponding to all the loads, determining the target number corresponding to the DC-DC converters according to the total power of the loads, and controlling the DC-DC converters corresponding to the target number to supply power to all the loads.
2. The train power supply control system according to claim 1, further comprising at least one relay connected to the vehicle control unit, wherein each relay is configured to control at least one of the loads in two adjacent train cars to be turned on or off, and the vehicle control unit controls at least one of the relays to be turned on or off simultaneously according to the target number and controls the DC-DC converters corresponding to the target number to supply power to all the loads.
3. The train power supply control method is characterized by comprising the following steps executed by a vehicle control unit:
acquiring load power corresponding to all loads, and determining the total load power;
determining a target number corresponding to the DC-DC converter based on the total load power and the rated power corresponding to the DC-DC converter;
and controlling the DC-DC converters corresponding to the target number to supply power to all the loads.
4. The train power supply control method according to claim 3, wherein the determining the target number of the DC-DC converters based on the total load power and the rated power of the DC-DC converters comprises:
acquiring a control ratio based on the quotient of the total load power and the rated power corresponding to the DC-DC converter;
and carrying out upward rounding operation on the control ratio to determine the target quantity corresponding to the DC-DC converter.
5. The train power supply control method according to claim 4, wherein the obtaining a control ratio based on the total load power and a rated power corresponding to the DC-DC converter comprises:
determining the redundancy power corresponding to the DC-DC converter according to the product of the rated power corresponding to the DC-DC converter and the preset redundancy ratio;
acquiring a control ratio based on the quotient of the total load power and the corresponding redundant power of the DC-DC converter;
and carrying out upward rounding operation on the control ratio to determine the target quantity corresponding to the DC-DC converter.
6. The train power supply control method according to claim 3, wherein the controlling of the DC-DC converters corresponding to the target number supplies power to all loads includes:
and if the target number is smaller than the number of the compartments of the whole vehicle, controlling all the relays to be simultaneously conducted, and controlling the DC-DC converters corresponding to the target number to supply power to all the loads.
7. The train power supply control method according to claim 3, wherein the controlling of the DC-DC converters corresponding to the target number supplies power to all loads includes:
and if the target number is equal to the number of the compartments of the whole vehicle, controlling all the relays to be switched off simultaneously, and controlling each DC-DC converter corresponding to the target number to supply power to at least one corresponding load.
8. The train power supply control method according to claim 3, wherein before the obtaining of the load powers corresponding to all the loads and the determining of the total load power, the train power supply control method further comprises:
and controlling the rail train to carry out power-on starting self-checking operation and pre-charging treatment.
9. A vehicle control unit comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the train power supply control method according to any one of claims 3 to 8 when executing the computer program.
10. A computer-readable storage medium storing a computer program, wherein the computer program is executed by a processor to implement the train power supply control method according to any one of claims 3 to 8.
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| CN201910791505.7A CN112436499B (en) | 2019-08-26 | 2019-08-26 | Train power supply control system, train power supply control method, controller and medium |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11127573A (en) * | 1997-10-23 | 1999-05-11 | Mitsubishi Electric Corp | Parallel operation device for dc-dc converter |
| JP2009219303A (en) * | 2008-03-12 | 2009-09-24 | Mitsubishi Electric Corp | Dc/dc power converter |
| JP2011188549A (en) * | 2010-03-04 | 2011-09-22 | Nec Corp | Power unit, and method of controlling the same |
| CN206060330U (en) * | 2016-05-12 | 2017-03-29 | 上海汽车集团股份有限公司 | Vehicle-mounted DC/DC transducers and vehicle-mounted low-voltage power supply system |
| CN206249232U (en) * | 2016-11-30 | 2017-06-13 | 国家电网公司 | Protection circuit |
| CN109228873A (en) * | 2017-07-10 | 2019-01-18 | 比亚迪股份有限公司 | Train and power supply system of train and its detection of electrical leakage recovery device, method |
-
2019
- 2019-08-26 CN CN201910791505.7A patent/CN112436499B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11127573A (en) * | 1997-10-23 | 1999-05-11 | Mitsubishi Electric Corp | Parallel operation device for dc-dc converter |
| JP2009219303A (en) * | 2008-03-12 | 2009-09-24 | Mitsubishi Electric Corp | Dc/dc power converter |
| JP2011188549A (en) * | 2010-03-04 | 2011-09-22 | Nec Corp | Power unit, and method of controlling the same |
| CN206060330U (en) * | 2016-05-12 | 2017-03-29 | 上海汽车集团股份有限公司 | Vehicle-mounted DC/DC transducers and vehicle-mounted low-voltage power supply system |
| CN206249232U (en) * | 2016-11-30 | 2017-06-13 | 国家电网公司 | Protection circuit |
| CN109228873A (en) * | 2017-07-10 | 2019-01-18 | 比亚迪股份有限公司 | Train and power supply system of train and its detection of electrical leakage recovery device, method |
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