Train multi-power energy energy distribution control method, device, equipment and medium

Abstract

The present application provides a kind of train multi-power energy energy distribution control method, device, equipment and medium, the train multi-power energy energy distribution control method includes: obtaining the line characteristic and energy source characteristic of target train, according to line characteristic and energy source characteristic determines the whole vehicle power demand and energy source output ability;According to the whole vehicle power demand and energy source output ability determines the flow ring given value and power distribution;According to the power demand of target train, control mode is accounted, and the control mode is obtained in one of traction mode and brake mode;According to the type of flow ring given value, the type of flow ring feedback value is determined, and, according to flow ring given value and flow ring feedback value, the output of controller is determined using closed-loop regulation.The beneficial effects of the present application are: the smooth adjustment of the power of multi-power energy energy, the accurate distribution of power regulation and the accurate control of direct current voltage.

Description

Technical Field

[0001] This invention relates to the field of train energy distribution and control technology, and in particular to a method, device, equipment and medium for controlling the energy distribution of multiple power sources in a train. Background Technology

[0002] The traction system of hybrid trains is relatively complex, mainly due to the diverse power sources. Common power sources include AC pantographs, internal combustion generators, lithium batteries, fuel cells, or other energy storage systems. Different types of hybrid trains use different combinations of power sources, thus changing the topology and control method of the traction inverter. Multiple power sources work together to provide energy to the traction inverter and auxiliary systems. This is achieved by converting each energy source through an inverter, transforming AC or DC power into DC voltage of the same voltage level, and then connecting them in parallel.

[0003] When multiple energy sources operate in parallel, if closed-loop control of the DC voltage is applied to all of them, circulating current or severe power imbalance may occur between the DC sources, making effective power distribution impossible and severely affecting control performance. To achieve power distribution when multiple energy sources operate in parallel, there are generally two approaches. One is for multiple parallel energy sources to communicate to achieve current sharing and power distribution. This approach has two modes: master-slave and non-master-slave. In master-slave mode, multiple DC / DC converters operate in a master-slave manner, with one energy source acting as the master controller. Electrical quantities, intermediate variables, or execution quantities during the control process are transmitted to the slave controller, which is in a subordinate position. In this mode, if the master controller fails, a new master controller must be determined for master-slave switching, making the execution logic relatively complex. Non-master-slave mode is generally used when multiple DC / DC converters are connected in parallel, within the same... The controller collects multiple DC / DC currents and uses a parallel current sharing control method based on the average current. However, this method requires multiple acquisition channels and is only applicable to DC / DC power supply, making it unsuitable for pantograph-catenary and internal combustion modes. The second method involves multiple parallel energy sources without communication. This method primarily uses droop control to achieve power distribution among the parallel current sources. However, droop control is essentially an open-loop control, which cannot achieve precise power distribution or precise DC voltage control. It is difficult to meet application requirements in situations where high DC voltage accuracy or precise power distribution among multiple energy sources is needed. Summary of the Invention

[0004] The main objective of this invention is to propose a method, device, equipment, and medium for controlling the distribution of energy from multiple power sources in a train, thereby achieving smooth regulation of power from multiple power sources, precise allocation of power regulation, and precise control of DC voltage.

[0005] One aspect of the present invention provides a method for energy distribution control of multiple power sources in a train, comprising:

[0006] Obtain the track characteristics and energy source characteristics of the target train, and determine the power requirements of the whole train and the output capacity of the energy source based on the track characteristics and energy source characteristics;

[0007] The setpoint of the flow equalization loop and the power distribution are determined based on the power requirements of the vehicle and the output capacity of the energy source.

[0008] The control mode is calculated based on the power requirements of the target train, and the control mode is determined to be one of the traction mode and the braking mode.

[0009] The type of the current sharing loop feedback value is determined based on the type of the current sharing loop setpoint, and the controller output is determined by closed-loop regulation based on the current sharing loop setpoint and the current sharing loop feedback value.

[0010] According to the aforementioned train multi-power energy distribution control method, determining the overall vehicle power demand and energy source output capacity based on line characteristics and energy source characteristics includes:

[0011] The power requirement of the vehicle is determined by the characteristics of the line, which include line characteristics, load characteristics, and operating requirements.

[0012] The power output capability of the energy source is determined by the characteristics of the energy source, which include energy source properties, power supply, current, and temperature.

[0013] According to the aforementioned train multi-power energy distribution control method, the method further includes:

[0014] The output capacity of the energy source can also be determined based on the output power and current of each energy source.

[0015] According to the aforementioned train multi-power energy distribution control method, determining the current sharing loop setpoint and power distribution based on the overall vehicle power demand and energy source output capacity includes:

[0016] The power source type for obtaining energy, including DC power sources and AC power sources;

[0017] When the power source is a DC energy source, the current sharing ring setpoint is determined by power or DC current, wherein the power of the DC energy source is determined by the product of the DC current value and the terminal voltage of the DC energy source; when the power source is an AC energy source, the current sharing ring setpoint is determined by one of power, current amplitude, effective current value, and instantaneous current value, wherein the power is determined by the product of the AC current value and the terminal voltage of the AC energy source.

[0018] The power distribution among multiple energy sources is determined according to a preset ratio. When the current sharing ring is given as power, the power distribution is determined based on the power exerted by each of the multiple energy sources. When the current sharing ring is given as current, the power distribution is determined by calculation through the terminal voltage of the energy sources.

[0019] According to the aforementioned train multi-power energy distribution control method, the calculation of the control mode based on the power demand of the target train further includes:

[0020] The total power of multiple energy sources is obtained. If the total power is the output power, the control mode is determined to be traction mode; if the total power is the input power, the control mode is determined to be braking mode.

[0021] According to the aforementioned train multi-power energy distribution control method, the type of the current sharing loop feedback value is determined based on the type of the current sharing loop setpoint, and the controller output is determined by closed-loop regulation based on the current sharing loop setpoint and the current sharing loop feedback value, including:

[0022] When determining the current sharing loop feedback value based on the current sharing loop setpoint, the types of the current sharing loop setpoint and the current sharing loop feedback value should be consistent.

[0023] The controller performs closed-loop or direct regulation of the flow equalization loop based on the feedback value of the flow equalization loop. Direct regulation sends out the flow equalization loop setpoint without performing closed-loop regulation. Closed-loop regulation uses either a proportional controller or a PI controller.

[0024] According to the aforementioned train multi-power energy distribution control method, the controller performs closed-loop adjustment of the current sharing loop based on the feedback value of the current sharing loop, including:

[0025] The controller includes a front-end voltage loop regulator, a current sharing loop controller, and a rear-end regulator, which perform closed-loop regulation of the outer loop, current sharing loop, and inner loop through the front-end voltage loop regulator, the current sharing loop controller, and the rear-end regulator.

[0026] According to the control mode, the DC voltage setpoint and the intermediate DC voltage feedback value are sent to the front-end voltage loop regulator. The front-end voltage loop regulator performs the first limiting process to obtain the first inner loop setpoint.

[0027] The current sharing loop setpoint and current sharing loop feedback value are used as inputs to the current sharing loop controller. After processing by the current sharing loop controller, the second inner loop setpoint is obtained.

[0028] The first inner loop setpoint and the second inner loop setpoint are added together and subjected to a second limiting process to obtain the total inner loop setpoint. The total inner loop setpoint is then used to perform closed-loop regulation through the subsequent regulator to obtain the total output of the controller, where the total output is the drive signal of the rectifier or DC converter.

[0029] Another aspect of the present invention provides a train multi-power energy distribution control device, comprising:

[0030] The first module is used to acquire the track characteristics and energy source characteristics of the target train, and to determine the power requirements of the whole train and the output capacity of the energy source based on the track characteristics and energy source characteristics.

[0031] The second module is used to determine the setpoint of the current sharing loop and the power distribution based on the power requirements of the vehicle and the output capacity of the energy source.

[0032] The third module is used to calculate the control mode based on the power requirements of the target train, and obtain the control mode as either traction mode or braking mode.

[0033] The fourth module is used to determine the type of the current sharing loop feedback value based on the type of the current sharing loop setpoint, and to determine the controller output by using closed-loop regulation based on the current sharing loop setpoint and the current sharing loop feedback value.

[0034] Another aspect of the present invention provides an electronic device, including a processor and a memory;

[0035] The memory is used to store programs;

[0036] The processor executes the program to implement the method as described above.

[0037] This invention also discloses a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device can read the computer instructions from the computer-readable storage medium and execute the computer instructions, causing the computer device to perform the methods described above.

[0038] The beneficial effects of this invention are as follows: by adopting the selection of control mode and the coordination of current loop command, even when there is a deviation in the intermediate DC voltage collected by the controllers of multiple energy sources, there can still be a DC voltage closed-loop regulator. This ensures that even when there is a deviation in the intermediate DC voltage collected by the controllers of multiple energy sources, a DC voltage closed-loop regulator is still included. This achieves smooth power regulation, precise power regulation allocation, and precise DC voltage control across the entire power range, regardless of whether the control mode changes. Attached Figure Description

[0039] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0040] Figure 1 This is a schematic diagram of a hybrid train traction system according to an embodiment of the present invention.

[0041] Figure 2 This is a schematic diagram of the train multi-power energy distribution control process according to an embodiment of the present invention.

[0042] Figure 3 This is a schematic diagram of power allocation calculation according to an embodiment of the present invention.

[0043] Figure 4 This is a schematic diagram of the overall control algorithm for train multi-power energy distribution according to an embodiment of the present invention.

[0044] Figure 5 This is a schematic diagram of a hybrid train process according to an embodiment of the present invention.

[0045] Figure 6 This is a schematic diagram of the simulation waveforms of different energy sources in an embodiment of the present invention.

[0046] Figure 7 This is a schematic diagram of a hybrid train traction device according to an embodiment of the present invention. Detailed Implementation

[0047] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. Throughout the description, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. In the following description, suffixes such as "module," "part," or "unit" used to denote elements are used only for the purpose of illustrative purposes and have no specific meaning in themselves. Therefore, "module," "part," or "unit" can be used interchangeably. Terms such as "first," "second," etc., are used only to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features. In the following description, the consecutive reference numerals for method steps are for ease of review and understanding. Adjusting the implementation order of steps, in conjunction with the overall technical solution of the present invention and the logical relationship between the various steps, will not affect the technical effect achieved by the technical solution of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0048] Terminology Explanation:

[0049] TCU, Traction Control Unit / Transmission Control Unit;

[0050] Four-quadrant converter, grid-side converter in traction converter;

[0051] CATENARY, overhead contact line;

[0052] TRANSFORMER, Transformer (in this embodiment of the invention, it refers to a traction transformer).

[0053] refer to Figure 1 ,in Figure 1 This is a schematic diagram of a hybrid power train traction system according to an embodiment of the present invention. It is understood that the hybrid power train can operate in either AC or DC grid mode. The AC energy source, in addition to the AC grid, may include AC power generated by an internal combustion generator; the DC energy source, in addition to the AC grid, may include a battery or a fuel cell. In hybrid mode, various combinations of these energy sources are possible.

[0054] refer to Figure 2 ,in Figure 2 This is a schematic diagram of the train multi-power energy distribution control process according to an embodiment of the present invention, which includes, but is not limited to, steps S100 to S400:

[0055] S100: Obtain the line characteristics and energy source characteristics of the target train, and determine the power requirements of the whole train and the output capacity of the energy source based on the line characteristics and energy source characteristics.

[0056] In some embodiments, the calculation of vehicle power demand and energy source output capacity includes: determining vehicle power demand through line characteristics, including line characteristics, load characteristics and operating requirements; and determining energy source output capacity through energy source characteristics, including energy source characteristics, power supply, current and temperature.

[0057] In some embodiments, reference Figure 3 The diagram shown illustrates the power distribution calculation. Power distribution requires two inputs: the overall vehicle power demand calculation and the output capacity calculation of each energy source. The overall vehicle power demand calculation is based on line characteristics, load characteristics, and operating requirements. The output capacity of each energy source needs to be calculated based on the characteristics of each energy source and by collecting its current, voltage, temperature, etc.

[0058] In some embodiments, the power output capability of the energy source can also be determined based on the output power and current of each energy source. The output of the power distribution includes the control mode and the current sharing loop setpoint for each energy source. The control mode is determined based on the overall vehicle power requirements to determine whether the current power flow is forward or reverse. Forward flow indicates power consumption at the downstream end, and reverse flow indicates power feedback at the downstream end. The control mode received by each energy source controller can be the same or different. Meanwhile, the setpoint of the current sharing loop is the output / input power or output / input current required by each energy source after comprehensive distribution. Once the type of the current sharing loop setpoint is determined, the type of feedback quantity of the current sharing loop is also consistent with it.

[0059] It is understandable that in some simple control modes, it is not necessary to calculate based on conditions such as line or load. The power or current required by each energy source can be directly specified. Although this method is simplified, it is still within the scope of protection of this invention.

[0060] S200 determines the setpoint of the current sharing ring and the power distribution based on the vehicle's power requirements and the energy source's output capacity.

[0061] In some embodiments, the power source type of the energy source is obtained, wherein the power source type includes DC energy source and AC energy source; when the power source type is DC energy source, the current sharing loop setpoint is determined by power or DC current, wherein the power of the DC energy source is determined by the product of the DC current value and the terminal voltage of the DC energy source; when the power source type is AC energy source, the current sharing loop setpoint is determined by one of power, current amplitude, current effective value and current instantaneous value, wherein the power is determined by the product of the AC current value and the terminal voltage of the AC energy source; the power distribution among multiple energy sources is determined according to a preset ratio; when the current sharing loop setpoint is power, the power distribution is determined according to the power exerted by each of the multiple energy sources; when the current sharing loop setpoint is current, it is determined by calculation using the terminal voltage of the energy source.

[0062] In some embodiments, reference Figure 2 The current sharing loop setpoint shown needs to consider the difference between DC energy sources and AC current sources. For DC energy sources, the current sharing loop setpoint can be either power or DC current, which are equivalent. The relationship is that power equals DC current multiplied by the terminal voltage of the DC power supply. For AC energy sources, the current sharing loop setpoint can be either power or AC current (amplitude, effective value, or instantaneous value), which are also equivalent. The relationship is that power equals AC current multiplied by the terminal voltage of the AC power supply.

[0063] It is understandable that power is not evenly distributed among different energy sources. Due to efficiency, lifespan, cost, or other application requirements, the power distribution among multiple energy sources is allocated according to an appropriate ratio. When the current sharing ring is given as power, it is equal to the power that each source needs to exert. When the current sharing ring is given as current, it can be obtained by converting it according to the terminal voltage of the energy source.

[0064] S300 calculates the control mode based on the power requirements of the target train, resulting in a control mode that is either traction mode or braking mode.

[0065] In some embodiments, the total power of multiple energy sources is obtained. If the total power is the output power, the control mode is determined to be the traction mode; if the total power is the input power, the control mode is determined to be the braking mode.

[0066] In some embodiments, the calculation of the control mode can be directly based on the vehicle's power demand, thus determining the power flow of the entire vehicle and whether power should be output (traction mode) or regenerate (braking mode). For a single energy source, the control mode needs to be determined in conjunction with the application method. For example, in the combined traction operation of pantograph and battery, the pantograph supplies power to the downstream load, and the battery can supply power to the downstream load or absorb energy from the pantograph to charge itself. The specific control mode is determined according to the application method.

[0067] It is understandable that when multiple energy source controllers jointly collect DC voltage for closed-loop control, severe power imbalance may occur due to acquisition errors. The calculation of the control mode plays an important role in the implementation of the overall control algorithm. Different control modes adopt different voltage loop output limiting modes, which can avoid unexpected circulating currents between multiple energy sources.

[0068] The above-mentioned method is an active method. In some embodiments, a passive method can also be used: the passive method does not specify whether to use traction or braking at the beginning, but uses the sum of the power of multiple energy sources (when AC current sources and DC current sources are mixed for power supply, conversion is required) to make a judgment. If the sum of all energy sources is the output power, it is judged as traction mode. If the sum of all energy sources is the input power, it is judged as braking mode.

[0069] S400 determines the type of current sharing loop feedback value based on the type of current sharing loop setpoint, and determines the controller output using closed-loop regulation based on the current sharing loop setpoint and current sharing loop feedback value.

[0070] In some embodiments, the current sharing loop uses the current sharing loop setpoint and the current sharing loop feedback value obtained in the process to work together. When the current sharing loop setpoint is power, the current sharing loop feedback value is also power, and when the current sharing loop setpoint is current, the current sharing loop feedback value is also current, and their types are consistent.

[0071] The current sharing loop is controlled by a current sharing loop regulator, which can be a proportional regulator or a PI regulator. Both can be considered as closed-loop regulation. In some cases, the current sharing loop setpoint can be directly output without intermediate closed-loop regulation. The output of the current sharing loop can be regarded as the feedforward value of the inner loop setpoint. The feedback value of the inner loop setpoint is obtained through the DC voltage closed-loop control output. The sum of the current sharing loop output and the DC voltage loop output is the total inner loop setpoint.

[0072] In some embodiments, reference Figure 4A schematic diagram of the overall control algorithm for energy distribution of multiple power sources in a train. The entire control loop in this embodiment is divided into three loops (outer loop, current sharing loop, and inner loop, with corresponding controllers being the front-stage voltage loop regulator, current sharing loop regulator, and rear-stage regulator). The outer loop is the DC voltage control loop, which sends the DC voltage setpoint and intermediate DC voltage feedback value to the front-stage voltage loop regulator. Its output is processed by limiting 1 according to the control mode and then output as part of the inner loop setpoint. The input to the current sharing loop is the setpoint and feedback value of the current sharing loop, which are then output after passing through the current sharing loop regulator to obtain another part of the inner loop setpoint. These two parts are added together, and the overall setpoint is then limited 2 according to the output capacity of the energy source.

[0073] For example, the implementation of limit 1 is as follows: when the control mode is traction mode, the minimum output limit of the output limiting link of the DC voltage loop is 0. For the DC energy source controller, this means that DC current is only allowed to be output. For the AC energy source controller, this means that the AC current amplitude is positive (indicating external power output). When the control mode is braking mode, the maximum output limit of the output limiting link of the DC voltage loop is 0. For the DC energy source controller, this means that DC current is only allowed to be output. For the AC energy source controller, this means that the AC current amplitude is negative (indicating power absorption from the load).

[0074] In some embodiments, the inner loop generally controls the current of the energy source, sending the given value and feedback value to the subsequent regulator for closed-loop regulation. Its output is the total output of the controller, i.e., the drive signal of the rectifier or DC converter.

[0075] For example, a schematic diagram of a hybrid train process is provided. Figure 5 The embodiments of the present invention realize closed-loop regulation of power distribution of each energy source, and at the same time realize closed-loop regulation of energy distribution and DC voltage. The implementation method is applicable to both AC energy sources and DC energy sources, and is applicable to both rectifiers and DC converters. During the process of energy inflow or outflow and power distribution of each energy source, the DC voltage can operate stably and no unexpected energy unevenness will occur.

[0076] refer to Figure 6The simulated waveform diagrams for different energy sources are shown. The DC voltage sampled value of energy source 2 is artificially set to be 20V lower than the actual DC voltage, while the DC voltage sampled value of energy source 1 is 20V higher than the actual DC voltage. Energy source 1 is switched on at 2.5s. Due to the heavy load, the current of energy source 1 continuously increases. Energy source 2 is started at 10s. Because the voltage sampled value of energy source 2 is lower than the actual value, it quickly becomes dominant, and all power is borne by energy source 2, while the power output of energy source 1 is reduced to zero, resulting in severe power imbalance. At 20s, the control method described in this invention is applied, and the currents of the two sources are immediately evenly distributed. Moreover, throughout the process, the DC voltage fluctuations are very small and almost negligible. Based on the simulated waveforms, it is determined that the embodiment of this invention achieves high control performance.

[0077] The embodiments of the present invention are not only suitable for hybrid trains, but also for operating conditions such as multiple rectifiers connected in parallel in pure AC electric locomotives, EMUs and urban rail vehicles, and multiple batteries connected in parallel in pure battery vehicles. They are applicable to both AC / DC converter parallel connection and DC / DC converter parallel connection.

[0078] Figure 7 This is a schematic diagram of a hybrid power train traction device according to an embodiment of the present invention. The device includes a first module 710, a second module 720, a third module 730, and a fourth module 740.

[0079] The system comprises four modules: the first module acquires the track and energy source characteristics of the target train, and determines the overall vehicle power demand and energy source output capacity based on these characteristics; the second module determines the current sharing loop setpoint and power allocation based on the overall vehicle power demand and energy source output capacity; the third module calculates the control mode based on the target train's power demand, resulting in either a traction mode or a braking mode; and the fourth module determines the type of current sharing loop feedback value based on the type of current sharing loop setpoint, and uses closed-loop regulation to determine the controller output based on the current sharing loop setpoint and feedback value.

[0080] Exemplarily, with the cooperation of the first module in the device, the embodiment device can implement any of the aforementioned train multi-power energy distribution control methods, i.e., in response to. The beneficial effects of the present invention are: obtaining the line characteristics and energy source characteristics of the target train; determining the overall vehicle power demand and energy source output capacity based on the line characteristics and energy source characteristics; determining the current sharing loop setpoint and power distribution based on the overall vehicle power demand and energy source output capacity; calculating the control mode based on the power demand of the target train to obtain a control mode of either traction mode or braking mode; determining the type of current sharing loop feedback value based on the type of current sharing loop setpoint; and determining the controller output using closed-loop regulation based on the current sharing loop setpoint and current sharing loop feedback value. The beneficial effects of this invention are as follows: by adopting the selection of control mode and the coordination of current loop command, even when there is a deviation in the intermediate DC voltage collected by the controllers of multiple energy sources, there can still be a DC voltage closed-loop regulator. This ensures that even when there is a deviation in the intermediate DC voltage collected by the controllers of multiple energy sources, a DC voltage closed-loop regulator is still included. This achieves smooth power regulation, precise power regulation allocation, and precise DC voltage control across the entire power range, regardless of whether the control mode changes.

[0081] This invention also provides an electronic device, which includes a processor and a memory;

[0082] The memory stores the program;

[0083] The processor executes a program to perform the aforementioned train multi-power energy distribution control method; the electronic device has the function of carrying and running the software system for train multi-power energy distribution control provided in the embodiments of the present invention, such as a personal computer, minicomputer, main frame, workstation, network or distributed computing environment, standalone or integrated computer platform, or communicating with charged particle tools or other imaging devices, etc.

[0084] This invention also provides a computer-readable storage medium storing a program that is executed by a processor to implement the train multi-power energy distribution control method described above.

[0085] In some alternative embodiments, the functions / operations mentioned in the block diagrams may not occur in the order shown in the operation diagrams. For example, depending on the functions / operations involved, two consecutively shown blocks may actually be executed substantially simultaneously, or the blocks may sometimes be executed in reverse order. Furthermore, the embodiments presented and described in the flowcharts of this invention are provided by way of example to provide a more comprehensive understanding of the technology. The disclosed methods are not limited to the operations and logic flows presented herein. Alternative embodiments are contemplated in which the order of various operations is altered and sub-operations described as part of a larger operation are executed independently.

[0086] This invention also discloses a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device can read the computer instructions from the computer-readable storage medium and execute the computer instructions, causing the computer device to perform the aforementioned train multi-power energy distribution control method.

[0087] Furthermore, although the invention has been described in the context of functional modules, it should be understood that, unless otherwise stated, one or more of the described functions and / or features may be integrated into a single physical device and / or software module, or one or more functions and / or features may be implemented in a separate physical device or software module. It is also understood that a detailed discussion of the actual implementation of each module is unnecessary for understanding the invention. Rather, given the properties, functions, and internal relationships of the various functional modules in the apparatus disclosed herein, the actual implementation of the module will be understood within the scope of conventional skill of an engineer. Therefore, those skilled in the art can implement the invention as set forth in the claims using ordinary techniques without excessive experimentation. It is also understood that the specific concepts disclosed are merely illustrative and not intended to limit the scope of the invention, which is determined by the full scope of the appended claims and their equivalents.

[0088] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0089] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0090] More specific examples of computer-readable media (a non-exhaustive list) include: electrical connections (electronic devices) having one or more wires, portable computer disk drives (magnetic devices), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0091] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0092] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0093] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

[0094] The above is a detailed description of the preferred embodiments of the present invention, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A method for controlling the energy distribution of multiple power sources in a train, characterized in that, include: Obtain the track characteristics and energy source characteristics of the target train, and determine the power requirements of the whole train and the output capacity of the energy source based on the track characteristics and energy source characteristics; The setpoint of the flow equalization loop and the power distribution are determined based on the power requirements of the vehicle and the output capacity of the energy source. The control mode is calculated based on the power requirements of the target train, and the control mode is determined to be one of the traction mode and the braking mode. The type of the current sharing loop feedback value is determined based on the type of the current sharing loop setpoint, and the controller output is determined by closed-loop regulation based on the current sharing loop setpoint and the current sharing loop feedback value.

2. The train multi-power energy distribution control method according to claim 1, characterized in that, The process of determining the vehicle power requirement and energy source output capacity based on line characteristics and energy source characteristics includes: The power requirement of the vehicle is determined by the characteristics of the line, which include line characteristics, load characteristics, and operating requirements. The power output capability of the energy source is determined by the characteristics of the energy source, which include energy source properties, power supply, current, and temperature.

3. The train multi-power energy distribution control method according to claim 2, characterized in that, The method further includes: The output capacity of the energy source can also be determined based on the output power and current of each energy source.

4. The train multi-power energy distribution control method according to claim 1, characterized in that, The process of determining the current sharing loop setpoint and power allocation based on the vehicle's power requirements and the energy source's output capacity includes: The power source type for obtaining energy, including DC power sources and AC power sources; When the power source is a DC energy source, the current sharing ring setpoint is determined by power or DC current, wherein the power of the DC energy source is determined by the product of the DC current value and the terminal voltage of the DC energy source; when the power source is an AC energy source, the current sharing ring setpoint is determined by one of power, current amplitude, effective current value, and instantaneous current value, wherein the power is determined by the product of the AC current value and the terminal voltage of the AC energy source. The power distribution among multiple energy sources is determined according to a preset ratio. When the current sharing ring is given as power, the power distribution is determined based on the power exerted by each of the multiple energy sources. When the current sharing ring is given as current, the power distribution is determined by calculation through the terminal voltage of the energy sources.

5. The train multi-power energy distribution control method according to claim 1, characterized in that, The calculation of the control mode based on the power requirements of the target train also includes: The total power of multiple energy sources is obtained. If the total power is the output power, the control mode is determined to be traction mode; if the total power is the input power, the control mode is determined to be braking mode.

6. The train multi-power energy distribution control method according to claim 1, characterized in that, The step of determining the type of the current sharing loop feedback value based on the type of the current sharing loop setpoint, and determining the controller output using closed-loop regulation based on the current sharing loop setpoint and the current sharing loop feedback value, includes: When determining the current sharing loop feedback value based on the current sharing loop setpoint, the types of the current sharing loop setpoint and the current sharing loop feedback value should be consistent. The controller performs closed-loop or direct regulation of the flow equalization loop based on the feedback value of the flow equalization loop. Direct regulation sends out the flow equalization loop setpoint without performing closed-loop regulation. Closed-loop regulation uses either a proportional controller or a PI controller.

7. The train multi-power energy distribution control method according to claim 6, characterized in that, The method of using a controller to perform closed-loop adjustment of the current sharing loop based on the feedback value of the current sharing loop includes: The controller includes a front-end voltage loop regulator, a current sharing loop controller, and a rear-end regulator, which perform closed-loop regulation of the outer loop, current sharing loop, and inner loop through the front-end voltage loop regulator, the current sharing loop controller, and the rear-end regulator. According to the control mode, the DC voltage setpoint and the intermediate DC voltage feedback value are sent to the front-end voltage loop regulator. The front-end voltage loop regulator performs the first limiting process to obtain the first inner loop setpoint. The current sharing loop setpoint and current sharing loop feedback value are used as inputs to the current sharing loop controller. After processing by the current sharing loop controller, the second inner loop setpoint is obtained. The first inner loop setpoint and the second inner loop setpoint are added together and subjected to a second limiting process to obtain the total inner loop setpoint. The total inner loop setpoint is then used to perform closed-loop regulation through the subsequent regulator to obtain the total output of the controller, where the total output is the drive signal of the rectifier or DC converter.

8. A train multi-power energy distribution control device, characterized in that, include: The first module is used to acquire the track characteristics and energy source characteristics of the target train, and to determine the power requirements of the whole train and the output capacity of the energy source based on the track characteristics and energy source characteristics. The second module is used to determine the setpoint of the current sharing loop and the power distribution based on the power requirements of the vehicle and the output capacity of the energy source. The third module is used to calculate the control mode based on the power requirements of the target train, and obtain the control mode as either traction mode or braking mode. The fourth module is used to determine the type of the current sharing loop feedback value based on the type of the current sharing loop setpoint, and to determine the controller output by using closed-loop regulation based on the current sharing loop setpoint and the current sharing loop feedback value.

9. An electronic device, characterized in that, Including the processor and memory; The memory is used to store programs; The processor executes the program to implement the train multi-power energy distribution control method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The storage medium stores a program, which is executed by a processor to implement the train multi-power energy distribution control method as described in any one of claims 1-7.

Images