Automatic energy distribution control method and apparatus for internal electric hybrid multiple unit, device, and medium

Abstract

An automatic energy distribution control method and apparatus for an internal electric hybrid multiple unit, a device, and a medium. The method comprises: connecting a rectifier output end of a generator set network in parallel with a converter output end of a power battery network (S1); acquiring electric signals of the output ends connected in parallel, and respectively feeding back same to an excitation system in a generator set network and a DC-DC converter system in a power battery network (S2); on the basis of a vehicle traction stage handle position, sending a first voltage upper limit value to the excitation system and sending a second voltage upper limit value to the converter system, and configuring the first voltage upper limit value to be greater than the second voltage upper limit value, so that when a voltage at the output ends connected in parallel is less than or equal to the second voltage upper limit value, the power battery network is used as a main power supply network, and when the voltage at the output ends connected in parallel is greater than the second voltage upper limit value and less than or equal to the first voltage upper limit value, the generator set network is used as the main power supply network and charging the power battery network (S3).

Description

Automatic energy distribution control methods, devices, equipment, and media for internal electric hybrid trainsets

[0001] This application claims priority to Chinese Patent Application No. 202411803954.6, filed with the Chinese Patent Office on December 09, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of locomotive power supply systems, such as an automatic energy distribution control method, device, equipment, and medium for internal electric hybrid train sets. Background Technology

[0003] With increasing global emphasis on environmental protection and energy conservation, hybrid power technology has been rapidly promoted and applied. Rail transit equipment is also developing towards greener and more intelligent directions to provide a safer, more comfortable, and more efficient travel experience. Simultaneously, with continuous progress and breakthroughs in battery technology, motor technology, and other related fields, a hybrid powertrain using an internal combustion engine and a power battery has emerged. The hybrid powertrain combines the high-rate discharge characteristics of the power battery, allowing for flexible adjustment of power output according to driving conditions, ensuring the engine operates at its optimal state, thereby significantly reducing fuel consumption and emissions. During deceleration or braking, the hybrid powertrain can recover some braking energy and store it in the battery, improving energy efficiency. By optimizing power distribution and energy management, the hybrid powertrain can significantly reduce fuel consumption, thereby lowering long-term operating costs for users.

[0004] However, in the relevant technical solutions, the hybrid power energy control method involves manually controlling a given fixed output power value and allocating the proportional relationship of hybrid power output power, which is a relatively complex process. Summary of the Invention

[0005] This application proposes an automatic energy distribution control method, device, equipment, and medium for internal electric hybrid train sets, which can realize the automatic distribution of power output from hybrid power.

[0006] This application provides an automatic energy distribution control method for an internal electric hybrid train. The method includes: connecting the rectifier output terminal of a generator network and the converter output terminal of a power battery network in parallel; collecting electrical signals from the parallel output terminals and feeding them back to the excitation system in the generator network and the DC-DC converter system in the power battery network, respectively; sending a first voltage upper limit value to the excitation system and a second voltage upper limit value to the converter system according to the locomotive traction stage position, and configuring the first voltage upper limit value to be greater than the second voltage upper limit value, such that when the voltage of the parallel output terminal is less than or equal to the second voltage upper limit value, the power battery network acts as the main power supply network, and when the voltage of the parallel output terminal is greater than the second voltage upper limit value and less than or equal to the first voltage upper limit value, the generator network acts as the main power supply network and charges the power battery network.

[0007] In some embodiments, the automatic energy distribution control method for the internal electric hybrid train of this application further includes: when the voltage of the parallel output terminal is less than the first voltage upper limit value, feedback adjustment of the excitation system to increase at least one of the excitation frequency and excitation current to increase the output voltage and output power of the generator network.

[0008] In some embodiments, the automatic energy distribution control method for internal electric hybrid trains of this application further includes: calculating the maximum output power of the diesel engine in real time based on the rated power loading rate of the diesel engine in the generator network and the load capacity of the diesel engine at different speeds and different power ranges; sending a first power upper limit value to the excitation system based on the maximum output power of the diesel engine; and controlling the cessation of feedback adjustment of the excitation system in response to the fact that the output voltage of the generator network does not reach the first voltage upper limit value, but the output power reaches the first power upper limit value.

[0009] In some embodiments, sending a first power upper limit value to the excitation system based on the maximum output power includes: determining the first power upper limit value as 80% to 90% of the maximum output power of the diesel engine, and sending the first power upper limit value to the excitation system.

[0010] In some embodiments, the automatic energy distribution control method for internal electric hybrid trains of this application further includes: in response to a locomotive load being less than or equal to the first power upper limit, the excitation system is not limited by the first power upper limit, and the feedback adjustment of the excitation system increases at least one of the excitation frequency and excitation current to increase the output voltage of the generator network to the first voltage upper limit.

[0011] In some embodiments, the automatic energy distribution control method for internal electric hybrid trains of this application further includes: when the voltage of the parallel output terminal is lowered to less than the second voltage upper limit value in response to the locomotive load being greater than the first power upper limit value, the switching frequency of the DC-DC converter system is adjusted to increase the output voltage and output power of the power battery network.

[0012] In some embodiments, the automatic energy distribution control method for the internal electric hybrid train of this application further includes: calculating the maximum output power of the power battery network in real time based on the load capacity of the power battery network, the remaining charge of the power battery, and the temperature state; sending a second power upper limit value to the DC-DC converter system based on the maximum output power of the power battery network; and controlling the cessation of feedback regulation of the DC-DC converter system in response to the fact that the output voltage of the power battery network does not reach the second voltage upper limit value, but the output power reaches the second power upper limit value.

[0013] In some embodiments, the automatic energy distribution control method for internal electric hybrid trains of this application further includes: in response to the locomotive load being greater than the first power upper limit value and the output power of the power battery network not reaching the second power upper limit value, increasing the voltage of the parallel output terminal to the second voltage upper limit value.

[0014] In some embodiments, the locomotive load includes: locomotive traction power and locomotive auxiliary power.

[0015] In some embodiments, the automatic energy distribution control method for internal electric hybrid trains of this application further includes: when the locomotive traction stage lever is in the full stage position, the power battery network and the generator set network jointly output power.

[0016] This application also provides an automatic energy distribution control device for an internal electric hybrid train, comprising: an output parallel module configured to connect the rectifier output of a generator network and the converter output of a power battery network in parallel; a data acquisition and feedback module configured to acquire electrical signals from the parallel outputs and feed them back to the excitation system in the generator network and the DC-DC-DC converter system in the power battery network, respectively; and a voltage control module configured to send a first voltage upper limit value to the excitation system and a second voltage upper limit value to the converter system according to the locomotive traction stage position, and configure the first voltage upper limit value to be greater than the second voltage upper limit value, such that when the voltage of the parallel output is less than or equal to the second voltage upper limit value, the power battery network acts as the main power supply network, and when the voltage of the parallel output is greater than the second voltage upper limit value and less than or equal to the first voltage upper limit value, the generator network acts as the main power supply network and charges the power battery network.

[0017] This application also provides a computer device, including: at least one processor; and a memory storing a computer program that can run on the processor, wherein when the processor executes the program, it implements the automatic energy distribution control method for hybrid electric multiple unit provided in any embodiment of this application.

[0018] This application also provides a computer-readable storage medium storing computer program instructions, which, when executed by a processor, implement the automatic energy distribution control method for hybrid electric multiple unit provided in any embodiment of this application. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the topology of the hybrid power output network according to an embodiment of this application;

[0020] Figure 2 is a flowchart of an automatic energy distribution control method for an internal electric hybrid train according to an embodiment of this application;

[0021] Figure 3 is a schematic diagram of the power output curve of hybrid power according to the method of the embodiment of this application;

[0022] Figure 4 is a schematic diagram of the structure of an automatic energy distribution control device for an internal electric hybrid train according to an embodiment of this application;

[0023] Figure 5 is a schematic diagram of the structure of a computer device according to an embodiment of this application. Detailed Implementation

[0024] The embodiments of this application will be described in detail below with reference to specific examples and the accompanying drawings.

[0025] In this application, all uses of the terms "first" and "second" are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this application. Subsequent embodiments will not explain this in detail.

[0026] In order to enable automatic power distribution of hybrid power output, this application binds the upper limit of hybrid power output voltage to the locomotive traction stage position, so that under any locomotive traction stage position, hybrid power output can automatically distribute power output based on the level and upper limit of hybrid power output voltage, thereby greatly simplifying the control process of hybrid power output.

[0027] Referring to Figure 1, which shows the topology of the hybrid power output network upon which the control method of this application is based. As shown in Figure 1, the DC output of the diesel generator set after rectification by the rectifier is connected in parallel with the DC output of the power battery after DC-DC conversion. Ammeters are installed in both the diesel generator set network and the power battery network, and potentiometers are installed at their parallel output terminals to detect electrical signals and achieve feedback regulation of the excitation system of the diesel generator set and the DC-DC converter system (feedback loop not shown).

[0028] Based on the above topology, this application proposes an automatic energy distribution control method for internal electric hybrid trainsets, as shown in Figure 2. The method includes:

[0029] Step S1: Connect the rectifier output terminal of the generator set network in parallel with the converter output terminal of the power battery network.

[0030] In this embodiment, the generator network refers to the power grid that includes diesel generator sets, excitation systems, and rectifiers, while the power battery network refers to the power grid that includes power batteries and DC-DC converter systems.

[0031] Step S2: Collect the electrical signals from the parallel output terminals and feed them back to the excitation system in the generator set network and the DC-DC converter system in the power battery network, respectively.

[0032] The purpose of this step is to establish a feedback control loop. Depending on the threshold configured for the corresponding excitation system or DC-DC converter system, each feedback control loop can realize voltage feedback control and power feedback control (hereinafter referred to as voltage loop and power loop).

[0033] Step S3: Send a first upper voltage limit value to the excitation system and a second upper voltage limit value to the DC-DC converter system in the power battery network according to the locomotive traction stage position. Configure the first upper voltage limit value to be greater than the second upper voltage limit value so that when the voltage of the parallel output terminal is less than or equal to the second upper voltage limit value, the power battery network acts as the main power supply network, and when the voltage of the parallel output terminal is greater than the second upper voltage limit value and less than or equal to the first upper voltage limit value, the generator network acts as the main power supply network and charges the power battery network.

[0034] This embodiment utilizes the characteristic of a power battery that can serve as both a power source and a charging load, allowing the power battery to automatically adjust its charging and discharging state based on the output of the generator network (i.e., the output of the common terminal), thereby achieving self-regulation. The purpose of configuring the first voltage upper limit value to be greater than the second voltage upper limit value is that this application will prioritize using the output power of the generator network for power supply, and only when the generator power is insufficient will the power battery be selected to supplement the power supply.

[0035] In some embodiments, when the voltage at the parallel output terminal is less than a first voltage upper limit, the feedback regulation excitation system increases at least one of the excitation frequency and excitation current to increase the output voltage and output power of the generator network.

[0036] In some embodiments, to protect the safety of the generator set under different traction stage positions, the method of this application further includes: calculating the maximum output power of the diesel engine in real time based on the rated power loading rate of the diesel engine in the generator set network and the load capacity of the diesel engine at different speeds and different power ranges; sending a first power upper limit value to the excitation system based on the maximum output power of the diesel engine; and controlling the cessation of feedback regulation on the excitation system in response to the generator set network's output voltage not reaching the first voltage upper limit value while the output power reaches the first power upper limit value.

[0037] For example, the locomotive traction stage lever is used to control the increase or decrease of the locomotive's traction force. When the locomotive's traction force increases, the traction load will increase, which will in turn lower the voltage of the parallel output terminal and change the first voltage upper limit value of the excitation system, thereby causing the excitation system to adjust the output voltage and output power of the generator network.

[0038] In some embodiments, in order to further protect the safety of generator set operation, a first power upper limit value is sent to the excitation system based on the maximum output power of the diesel engine, including: determining the first power upper limit value at 80% to 90% of the maximum output power of the diesel engine, and sending the first power upper limit value to the excitation system to prevent the diesel generator set from operating at maximum output power.

[0039] In some embodiments, please refer to Figure 3. The solution of this application can automatically adjust the input and output power of the power battery according to the locomotive load power. When the power battery has sufficient power, the locomotive's rapid loading and traction requirements can be met by controlling the first voltage upper limit and the first power upper limit, so that the diesel engine can work in a lower load rate range and a more economical fuel consumption rate operating point, thereby improving energy utilization efficiency and realizing energy saving and emission reduction of the locomotive.

[0040] In some embodiments, when the locomotive traction stage lever position changes, the following series of feedback adjustments will also be triggered:

[0041] In some embodiments, in response to a locomotive load being less than or equal to a first power upper limit, the excitation system is not limited by the first power upper limit and causes the feedback-regulated excitation system to increase at least one of the excitation frequency and excitation current to raise the output voltage of the generator network to a first voltage upper limit. Exemplarily, the locomotive's load power mainly consists of two parts: locomotive traction power TR + locomotive auxiliary power AUX. At any locomotive traction stage position, if the locomotive load is less than or equal to the first power upper limit, the generator network is mainly controlled by voltage loop feedback, and not by power loop limitation.

[0042] Correspondingly, in some embodiments, when the locomotive load exceeds a first power limit and the voltage of the parallel output terminal is lowered to below a second voltage limit, the switching frequency of the DC-DC converter system is adjusted to increase the output voltage and output power of the power battery network; when the output voltage of the power battery network exceeds the output voltage of the generator network, the power battery network and the generator network jointly output power. For example, in any locomotive traction position, if the locomotive load exceeds the first power limit, it indicates that the generator network is insufficient to supply the load. In this case, the load will lower the output voltage of the diesel generator set, causing the power battery network to contribute to the output power. At this time, the diesel generator set will be limited by a power loop, specifically including restrictions such as prohibiting further increases in diesel engine speed or excitation.

[0043] In some embodiments, the maximum output power of the power battery network is calculated in real time based on the load capacity of the power battery network, the remaining charge of the power battery, and the temperature state; a second power upper limit value is sent to the DC-DC converter system based on the maximum output power of the power battery network; in response to the output voltage of the power battery network not reaching the second voltage upper limit value, but the output power reaching the second power upper limit value, the feedback regulation of the DC-DC converter system is stopped.

[0044] For example, when the load pulls the voltage of the parallel output terminal down to the second upper voltage limit or lower, the power battery network will participate in the output power. After feedback regulation, if the sum of the output power of the power battery network and the output power of the generator network can meet the load demand, and the voltage of the parallel output terminal has not reached the second upper voltage limit, the power battery network will be limited by the power loop to avoid its output current being too large.

[0045] In some embodiments, the method of this application further includes: in response to the power battery network's output power not reaching a second power upper limit value, increasing the voltage of the parallel output terminal to a second voltage upper limit value.

[0046] For example, when the locomotive load is greater than the first power limit value, there are two possible adjustment results of the DC-DC converter system. One is as in the previous embodiment, where the output power of the power battery network is increased first, and then limited by the second power limit value. The other is as in this embodiment, where the output voltage of the power battery network is first limited by the voltage loop, and then the voltage of the parallel output terminal is increased to the second voltage limit value.

[0047] In some embodiments, the method of this application further includes: when the locomotive traction stage is in the full stage position, the power battery network and the generator set network jointly output power.

[0048] For example, when the locomotive traction stage lever is in the full stage position, the method for enabling the power battery network and the generator set network to jointly output power is as follows: send a first voltage upper limit value to the excitation system in the generator set network and send a second voltage upper limit value to the DC-DC converter system in the power battery network, and make the first voltage upper limit value equal to the second voltage upper limit value.

[0049] As shown in Figure 4, this application proposes an automatic energy distribution control device for an internal electric hybrid train, comprising:

[0050] The output parallel module 410 is configured to connect the rectifier output terminal of the generator set network and the converter output terminal of the power battery network in parallel.

[0051] The acquisition and feedback module 420 is configured to acquire the electrical signals of the parallel output terminals and feed them back to the excitation system in the generator set network and the DC-DC-DC converter system in the power battery network, respectively.

[0052] The voltage control module 430 is configured to send a first upper voltage limit value to the excitation system and a second upper voltage limit value to the converter system based on the locomotive traction stage position. The first upper voltage limit value is configured to be greater than the second upper voltage limit value, such that when the voltage of the parallel output terminal is less than or equal to the second upper voltage limit value, the power battery network acts as the main power supply network, and when the voltage of the parallel output terminal is greater than the second upper voltage limit value and less than or equal to the first upper voltage limit value, the generator set network acts as the main power supply network and charges the power battery network.

[0053] The automatic energy distribution control device for hybrid electric multiple units (HMUs) provided in this application can execute the automatic energy distribution control method for HMUs provided in any embodiment of this application, and has the corresponding functional modules and beneficial effects of the method.

[0054] As shown in Figure 5, this application also provides a computer device 500, including:

[0055] At least one processor 520; and

[0056] The memory 510 stores a computer program that can run on a processor. When the processor 520 executes the program, it implements any of the above-mentioned automatic energy distribution control methods for hybrid electric multiple units.

[0057] This application also provides a computer-readable storage medium storing computer program instructions, which, when executed by a processor, implement any of the above-described automatic energy distribution control methods for hybrid electric multiple units.

Claims

1. A method for automatic energy distribution control of an internal electric hybrid train, comprising: Connect the rectifier output terminal of the generator set network in parallel with the converter output terminal of the power battery network; The electrical signals at the parallel output terminals are collected and fed back to the excitation system in the generator set network and the DC-DC-DC converter system in the power battery network, respectively. The locomotive traction stage handle position sends a first upper voltage limit value to the excitation system and a second upper voltage limit value to the converter system, and configures the first upper voltage limit value to be greater than the second upper voltage limit value, so that when the voltage of the parallel output terminal is less than or equal to the second upper voltage limit value, the power battery network acts as the main power supply network, and when the voltage of the parallel output terminal is greater than the second upper voltage limit value and less than or equal to the first upper voltage limit value, the generator set network acts as the main power supply network and charges the power battery network.

2. The automatic energy distribution control method for an internal electric hybrid train according to claim 1, further comprising: When the voltage at the parallel output terminal is less than the first voltage upper limit, the excitation system is adjusted to increase at least one of the excitation frequency and excitation current to increase the output voltage and output power of the generator network.

3. The automatic energy distribution control method for an internal electric hybrid train according to claim 2, further comprising: The maximum output power of the diesel engine is calculated in real time based on the rated power loading rate of the diesel engine in the generator network and the load capacity of the diesel engine at different speeds and power ranges. A first power upper limit value is sent to the excitation system based on the maximum output power of the diesel engine; In response to the generator network's output voltage failing to reach the first voltage upper limit while its output power reaches the first power upper limit, the control stops the feedback regulation of the excitation system.

4. The automatic energy distribution control method for internal electric hybrid trainsets according to claim 3, wherein, Sending a first power upper limit value to the excitation system based on the maximum output power includes: The first power upper limit value is determined based on 80% to 90% of the maximum output power of the diesel engine, and the first power upper limit value is sent to the excitation system.

5. The automatic energy distribution control method for an internal electric hybrid train according to claim 3, further comprising: When the locomotive load is less than or equal to the first power upper limit, the excitation system is not limited by the first power upper limit and the feedback adjustment of the excitation system increases at least one of the excitation frequency and excitation current to increase the output voltage of the generator network to the first voltage upper limit.

6. The automatic energy distribution control method for an internal electric hybrid train according to claim 3, the method further includes: When the load on the locomotive exceeds the first power limit and the voltage at the parallel output terminal is lowered to below the second voltage limit, the switching frequency of the DC-DC converter system is adjusted to increase the output voltage and output power of the power battery network.

7. The automatic energy distribution control method for an internal electric hybrid train according to claim 6, further comprising: The maximum output power of the power battery network is calculated in real time based on the load capacity of the power battery network, the remaining charge of the power battery, and the temperature status. A second power upper limit value is sent to the DC-DC converter system based on the maximum output power of the power battery network; In response to the fact that the output voltage of the power battery network does not reach the second voltage upper limit value, but the output power reaches the second power upper limit value, the control stops the feedback regulation of the DC-DC converter system.

8. The automatic energy distribution control method for an internal electric hybrid train according to claim 7, further comprising: In response to the locomotive load exceeding the first power limit value and the output power of the power battery network failing to reach the second power limit value, the voltage of the parallel output terminal is increased to the second voltage limit value.

9. The automatic energy distribution control method for an internal electric hybrid train according to any one of claims 5-8, wherein, The locomotive load includes: locomotive traction power and locomotive auxiliary power.

10. The automatic energy distribution control method for an internal electric hybrid train according to claim 1, further comprising: When the locomotive traction stage is at full power, the power battery network and the generator set network jointly output power.

11. An automatic energy distribution control device for an internal electric hybrid train, comprising: The output parallel module is configured to connect the rectifier output terminal of the generator set network and the converter output terminal of the power battery network in parallel. The acquisition and feedback module is configured to acquire the electrical signals of the parallel output terminals and feed them back to the excitation system in the generator set network and the DC-DC-DC converter system in the power battery network, respectively. The voltage control module is configured to send a first upper voltage limit value to the excitation system and a second upper voltage limit value to the converter system based on the locomotive traction stage position. The first upper voltage limit value is configured to be greater than the second upper voltage limit value, such that when the voltage of the parallel output terminal is less than or equal to the second upper voltage limit value, the power battery network acts as the main power supply network, and when the voltage of the parallel output terminal is greater than the second upper voltage limit value and less than or equal to the first upper voltage limit value, the generator set network acts as the main power supply network and charges the power battery network.

12. A computer device, comprising: At least one processor; as well as The memory stores a computer program that can run on a processor, and when the processor executes the program, it implements the automatic energy distribution control method for the internal electric hybrid train as described in any one of claims 1-10.

13. A computer-readable storage medium storing computer program instructions that, when executed by a processor, implement the automatic energy distribution control method for an internal electric hybrid train as described in any one of claims 1-10.

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