High voltage abnormal power failure safety control method, power generation side inverter and power generation side system

Abstract

The present invention discloses a high-voltage abnormal power-off safety control method, a generator-side inverter, and a generator-side system, wherein the method comprises: obtaining the actual DC voltage of the bus and the preset target reference DC voltage of the bus; when it is detected that the actual DC voltage of the bus is greater than the preset DC overvoltage threshold of the bus, or when it is detected that the actual DC voltage of the bus is less than the preset DC undervoltage threshold of the bus, then stop receiving the external power generation torque command input by the vehicle controller; perform voltage proportional integral adjustment according to the obtained actual DC voltage of the bus and the preset target reference DC voltage of the bus, so that the actual DC voltage of the bus adapts to the preset target reference DC voltage of the bus, and obtains the bus regulated output DC voltage; according to the obtained bus regulated output DC voltage, control the generator to generate the actual execution power generation torque. The present invention can continuously provide a stable DC high-voltage input for the torque control of the drive-side inverter, so that the vehicle traction power is not interrupted.

Description

Technical Field

[0001] The present invention relates to the technical field of dual inverter systems for hybrid electric vehicles, and in particular to a high-voltage abnormal power failure safety control method, a power generation side inverter and a power generation side system. Background Art

[0002] In recent years, dual inverter systems have been widely used to meet the needs of hybrid vehicles for simultaneous driving and power generation. In hybrid vehicles, the drive-side inverter is responsible for controlling the output traction torque of the motor, and provides the traction power required by the vehicle according to the drive torque command of the vehicle controller; the generator-side inverter is responsible for controlling the generator to convert mechanical kinetic energy into DC electrical energy, responding to the power generation torque command of the vehicle controller, and inputting energy that meets the vehicle's power requirements into the high-voltage power battery. Both dual inverters use torque control to control the motor.

[0003] However, in actual vehicle operating conditions, once the high-voltage power battery is abnormally powered off, since torque control takes torque as the control target, the DC high-voltage network cannot generate a relatively stable DC voltage, and the dual inverter will produce high-voltage overvoltage or undervoltage faults, causing unexpected power loss of the vehicle. In severe cases, the working modules on the high-voltage network will be damaged by overvoltage.

[0004] Therefore, it is necessary to propose a safety mechanism for abnormal high-voltage power failure of the entire vehicle to continuously provide stable DC high-voltage input for the torque control of the drive-side inverter so that the vehicle's traction power is not interrupted. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the above-mentioned background technology and to provide a high-voltage abnormal power-off safety control method, a power generation side inverter and a power generation side system.

[0006] In a first aspect, a high voltage abnormal power failure safety control method is provided, comprising the following steps:

[0007] Obtain the actual DC voltage of the bus and the preset target reference DC voltage of the bus;

[0008] When it is detected that the actual DC voltage of the bus is greater than the preset DC overvoltage threshold of the bus, or when it is detected that the actual DC voltage of the bus is less than the preset DC undervoltage threshold of the bus, the external power generation torque command input by the vehicle controller is stopped;

[0009] Perform voltage proportional integral regulation according to the obtained actual DC voltage of the bus and the preset target reference DC voltage of the bus, so that the actual DC voltage of the bus adapts to the preset target reference DC voltage of the bus, and obtains the bus regulated output DC voltage;

[0010] The bus bar adjusts the output DC voltage obtained and controls the generator to produce the actual generating torque.

[0011] According to the first aspect, in a first possible implementation manner of the first aspect, the step of “performing voltage proportional integral regulation according to the obtained actual bus DC voltage and the preset target reference DC voltage of the bus, so that the actual bus DC voltage adapts to the preset target reference DC voltage of the bus, and obtaining the bus regulated output DC voltage” includes the following steps:

[0012] When it is detected that the obtained bus actual DC voltage is greater than the bus preset target reference DC voltage, the target reference generating torque of the generator and the target reference charging power of the generator are reduced by performing voltage proportional integral adjustment on the bus actual DC voltage and the bus preset target reference DC voltage, so that the voltage value of the bus actual DC voltage drops to the voltage value of the bus preset target reference DC voltage, and the bus regulated output DC voltage is obtained;

[0013] When it is detected that the obtained actual DC voltage of the bus is less than the preset target reference DC voltage of the bus, the voltage proportional integral adjustment is performed on the actual DC voltage of the bus and the preset target reference DC voltage of the bus to increase the target reference generating torque of the generator and the target reference charging power of the generator, so that the voltage value of the actual DC voltage of the bus rises to the voltage value of the preset target reference DC voltage of the bus, and the bus regulated output DC voltage is obtained.

[0014] According to the first aspect, in a second possible implementation manner of the first aspect, after the step of “when it is detected that the actual DC voltage of the bus is greater than the preset DC overvoltage threshold of the bus, or when it is detected that the actual DC voltage of the bus is less than the preset DC undervoltage threshold of the bus, then stopping receiving the external power generation torque command input by the vehicle controller”, the following steps are included:

[0015] Get the maximum charging power of the generator;

[0016] Obtaining the maximum driving limit power of the drive-side inverter according to the obtained actual DC voltage of the bus, the preset target reference DC voltage of the bus and the maximum charging power of the generator;

[0017] According to the obtained maximum power limit of the drive-side inverter, a drive power limit instruction is sent to the drive-side inverter.

[0018] According to the first aspect, in a third possible implementation manner of the first aspect, the step of “obtaining the maximum driving limit power according to the obtained actual DC voltage of the bus, the preset target reference DC voltage of the bus, and the maximum charging power of the generator” includes the following steps:

[0019] According to the obtained bus actual DC voltage Udc_fdb, the bus preset target reference DC voltage Udc_ref, and the generator maximum charging power P_max;

[0020] Obtain the maximum driving limit power P_lim of the driving side inverter;

[0021] P_lim=Udc_fdb / Udc_ref*P_max.

[0022] According to the first aspect, in a fourth possible implementation manner of the first aspect, after the step of “obtaining the actual DC voltage of the bus and the preset target reference DC voltage of the bus”, the following steps are included:

[0023] When it is detected that the actual DC voltage of the bus is greater than the preset DC undervoltage threshold of the bus and less than the preset DC overvoltage threshold of the bus, an external power generation torque command input by the vehicle controller is received;

[0024] According to the received external power generation torque command, the generator is controlled to generate the actual power generation torque.

[0025] In a second aspect, a power generation side inverter is provided, comprising:

[0026] A data acquisition module is used to obtain the actual DC voltage of the bus and the preset target reference DC voltage of the bus;

[0027] A threshold comparison module is in communication with the data acquisition module and is used to stop receiving the external power generation torque command input by the vehicle controller when it is detected that the actual DC voltage of the bus is greater than the preset DC overvoltage threshold of the bus, or when it is detected that the actual DC voltage of the bus is less than the preset DC undervoltage threshold of the bus;

[0028] A voltage regulation module, which is in communication with the data acquisition module and is used to perform voltage proportional integral regulation according to the obtained actual DC voltage of the bus and the preset target reference DC voltage of the bus, so that the actual DC voltage of the bus adapts to the preset target reference DC voltage of the bus, and obtains the bus regulated output DC voltage;

[0029] The power generation torque module is in communication with the voltage regulation module and is used to adjust the output DC voltage according to the obtained busbar to control the generator to generate actual power generation torque.

[0030] According to the second aspect, in a first possible implementation manner of the second aspect, the voltage regulating module includes a first voltage regulating module and a second voltage regulating module;

[0031] The first voltage regulating module is used for, when it is detected that the obtained bus actual DC voltage is greater than the bus preset target reference DC voltage, to reduce the target reference generating torque and target reference charging power of the generator by performing voltage proportional integral regulation on the bus actual DC voltage and the bus preset target reference DC voltage, so that the voltage value of the bus actual DC voltage drops to the voltage value of the bus preset target reference DC voltage, and obtain the bus regulated output DC voltage;

[0032] The second voltage regulation module is used to increase the target reference generating torque of the generator and the target reference charging power of the generator by performing voltage proportional integral regulation on the actual DC voltage of the bus and the preset target reference DC voltage of the bus when it is detected that the actual DC voltage of the bus is less than the preset target reference DC voltage of the bus, so that the voltage value of the actual DC voltage of the bus rises to the voltage value of the preset target reference DC voltage of the bus, and the bus regulated output DC voltage is obtained.

[0033] According to the second aspect, in a second possible implementation of the second aspect, the generator side inverter also includes a drive limiting power module communicatively connected to the threshold comparison module, and the drive limiting power module is used to obtain the maximum charging power of the generator, and obtain the maximum drive limiting power of the drive side inverter based on the obtained actual DC voltage of the bus, the preset target reference DC voltage of the bus and the maximum charging power of the generator, and send a drive limiting power instruction to the drive side inverter based on the obtained maximum limit power of the drive side inverter.

[0034] According to the second aspect, in a third possible implementation of the second aspect, the generator side inverter also includes an external power generation torque instruction acquisition module that is communicatively connected to the data acquisition module 510, and the external power generation torque instruction acquisition module is used to receive the external power generation torque instruction input by the vehicle controller when the actual DC voltage of the bus is greater than the preset DC undervoltage threshold of the bus and less than the preset DC overvoltage threshold of the bus, and control the generator to generate actual execution power generation torque according to the received external power generation torque instruction.

[0035] In a third aspect, a power generation side system is provided, comprising: an engine, a generator drivingly connected to the engine, and a power generation side inverter as described above, communicatively connected to the generator.

[0036] Compared with the prior art, the advantages of the present invention are as follows: in response to the problem of abnormal high-voltage power failure of the whole vehicle, a high-voltage abnormal power failure safety control method is provided, firstly, the actual DC voltage of the bus and the preset target reference DC voltage of the bus are obtained; when it is detected that the actual DC voltage of the bus is greater than the preset DC overvoltage threshold of the bus, or it is detected that the actual DC voltage of the bus is less than the preset DC undervoltage threshold of the bus, the external power generation torque command input by the whole vehicle controller is stopped; then, voltage proportional integral adjustment is performed according to the obtained actual DC voltage of the bus and the preset target reference DC voltage of the bus, so that the actual DC voltage of the bus adapts to the preset target reference DC voltage of the bus, and the bus regulated output DC voltage is obtained; then, according to the obtained bus regulated output DC voltage, the generator is controlled to generate the actual execution power generation torque. Therefore, by real-time monitoring of the actual bus DC voltage overvoltage or undervoltage fault, the external power generation torque command input by the vehicle controller is stopped, and then the actual bus DC voltage and the bus preset target reference DC voltage are adjusted by voltage proportional integral, so as to adjust the actual execution power generation torque and realize the stable control input of the bus DC high voltage; therefore, through the obtained bus regulated output DC voltage, the generator generates the actual execution power generation torque, which can continuously provide stable DC high voltage input for the torque control of the drive side inverter, so that the vehicle traction power is not interrupted. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a flow chart of a high voltage abnormal power failure safety control method according to an embodiment of the present invention;

[0038] Figure 2 It is a structural schematic diagram of a hybrid electric vehicle dual inverter system according to an embodiment of the present invention;

[0039] Figure 3 This is a flow chart of a high voltage abnormal power failure safety control method according to another embodiment of the present invention.

[0040] Figure 4 It is a structural schematic diagram of a power generation side inverter according to an embodiment of the present invention.

[0041] Figure Number:

[0042] 100, power battery; 200, relay; 300, drive side inverter; 400, motor; 500, power generation side inverter; 510, data acquisition module; 520, threshold comparison module; 530, voltage regulation module; 540, power generation torque module; 550, drive limit power module; 560, external power generation torque instruction acquisition module; 600, generator; 700, engine. DETAILED DESCRIPTION

[0043] Reference will now be made in detail to specific embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Although the present invention will be described in conjunction with specific embodiments, it will be understood that it is not intended to limit the present invention to the embodiments described. On the contrary, it is intended to cover changes, modifications and equivalents included in the spirit and scope of the present invention as defined by the appended claims. It should be noted that the method steps described herein can all be implemented by any functional block or functional arrangement, and any functional block or functional arrangement can be implemented as a physical entity or a logical entity, or a combination of the two.

[0044] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0045] Note: The example to be introduced below is only a specific example, and is not intended to limit the embodiments of the present invention to the following specific steps, values, conditions, data, sequences, etc. Those skilled in the art can apply the concept of the present invention to construct more embodiments not mentioned in this specification by reading this specification.

[0046] See also Figure 1 As shown, an embodiment of the present invention provides a high-voltage abnormal power failure safety control method, comprising the following steps:

[0047] S100, obtaining the actual DC voltage of the bus and the preset target reference DC voltage of the bus;

[0048] S200, when it is detected that the actual DC voltage of the bus is greater than the preset DC overvoltage threshold of the bus, or when it is detected that the actual DC voltage of the bus is less than the preset DC undervoltage threshold of the bus, then stop receiving the external power generation torque command input by the vehicle controller;

[0049] S300, performing voltage proportional integral regulation according to the obtained actual bus DC voltage and the preset target reference DC voltage of the bus, so that the actual bus DC voltage adapts to the preset target reference DC voltage of the bus, and obtaining the bus regulated output DC voltage;

[0050] S400, adjusting the output DC voltage of the bus according to the obtained output DC voltage, and controlling the generator to generate actual generating torque.

[0051] See also Figure 2As shown, in the hybrid electric vehicle dual inverter system, it mainly includes a power battery 100, a relay 200, a drive side inverter 300, a motor 400, a generator side inverter 500, a generator 600, and an engine 700. The working process is as follows: the relay switch is closed to enable the driving of the dual inverter, and the engine converts the chemical energy of the fuel into mechanical energy to drive the generator to rotate; the generator side inverter controls the generator to generate power torque according to the needs of the whole vehicle to control the charging power of the bus DC side; the power battery receives the charging energy of the generator side inverter; the drive side inverter uses the power battery energy and the charging energy of the generator side inverter to control the traction motor to generate the driving torque required by the whole vehicle; once the relay is abnormally disconnected, the high voltage will be abnormally powered off, if the power generation side power generation is greater than the drive side power generation, the bus DC overvoltage will occur, if the power generation side power generation is less than the drive side power generation, the bus DC undervoltage will occur.

[0052] Specifically, in the present embodiment, a high-voltage abnormal power-off safety control method is provided to solve the problem of abnormal power-off of the whole vehicle, firstly, the actual DC voltage of the bus and the preset target reference DC voltage of the bus are obtained; when it is detected that the actual DC voltage of the bus is greater than the preset DC overvoltage threshold of the bus, or it is detected that the actual DC voltage of the bus is less than the preset DC undervoltage threshold of the bus, the external power generation torque command input by the whole vehicle controller is stopped (for a normal whole vehicle high voltage system, the actual execution power generation torque of the generator comes from the power generation torque command issued by the whole vehicle controller); then, voltage proportional integral adjustment is performed according to the obtained actual DC voltage of the bus and the preset target reference DC voltage of the bus, so that the actual DC voltage of the bus adapts to the preset target reference DC voltage of the bus, and the bus regulated output DC voltage is obtained; then, according to the obtained bus regulated output DC voltage, the generator generates the actual execution power generation torque. Therefore, by real-time monitoring of the actual bus DC voltage overvoltage or undervoltage fault, the external power generation torque command input by the vehicle controller is stopped, and the actual bus DC voltage and the bus preset target reference DC voltage are adjusted by voltage proportional integral, so as to adjust the actual execution power generation torque and realize the stable control input of the bus DC high voltage; therefore, the obtained bus regulated output DC voltage is used to control the generator to produce the actual execution power generation torque, which can continuously provide stable DC high voltage input for the torque control of the drive side inverter, so that the vehicle traction power is not interrupted.

[0053] See also Figure 2 As shown, the step of "S300, performing voltage proportional integral regulation according to the obtained actual DC voltage of the bus and the preset target reference DC voltage of the bus, so that the actual DC voltage of the bus adapts to the preset target reference DC voltage of the bus, and obtaining the bus regulated output DC voltage" includes the following steps:

[0054] S310, when it is detected that the obtained bus actual DC voltage is greater than the bus preset target reference DC voltage, the target reference generating torque of the generator and the target reference charging power of the generator are reduced by performing voltage proportional integral adjustment on the bus actual DC voltage and the bus preset target reference DC voltage, so that the voltage value of the bus actual DC voltage drops to the voltage value of the bus preset target reference DC voltage, and the bus regulated output DC voltage is obtained;

[0055] S320, when it is detected that the obtained bus actual DC voltage is less than the bus preset target reference DC voltage, the target reference generating torque of the generator and the target reference charging power of the generator are increased by performing voltage proportional integral adjustment on the bus actual DC voltage and the bus preset target reference DC voltage, so that the voltage value of the bus actual DC voltage rises to the voltage value of the bus preset target reference DC voltage, and the bus regulated output DC voltage is obtained.

[0056] Specifically, in this embodiment, voltage proportional integral regulation is performed by comparing the deviation between the actual DC voltage of the bus and the preset target reference DC voltage of the bus, so that the actual DC voltage of the bus tracks and adapts to the preset target reference DC voltage of the bus, thereby obtaining the bus regulated output DC voltage, and the actual execution power generation torque of the generator is obtained by the bus regulated output DC voltage after voltage proportional integral regulation; therefore, by adjusting the actual execution power generation torque, the stable control input of the bus DC high voltage is achieved.

[0057] Optionally, after the step of “S200, when it is detected that the actual DC voltage of the bus is greater than the preset DC overvoltage threshold of the bus, or when it is detected that the actual DC voltage of the bus is less than the preset DC undervoltage threshold of the bus, then stop receiving the external power generation torque command input by the vehicle controller”, the following steps are included:

[0058] S210, obtaining the maximum charging power of the generator;

[0059] S220, acquiring a maximum driving limit power of a driving-side inverter according to the obtained actual DC voltage of the bus, the preset target reference DC voltage of the bus, and the maximum charging power of the generator;

[0060] S230: Send a driving power limit instruction to the driving side inverter according to the obtained maximum power limit of the driving side inverter.

[0061] Specifically, in this embodiment, when the actual DC voltage of the bus is monitored in real time for overvoltage or undervoltage fault, a drive power limitation instruction needs to be sent to the drive side inverter; because after the actual DC voltage of the bus is overvoltage, the DC voltage on the DC side of the entire dual inverter system is too large, to avoid excessive driving torque output by the traction motor, which will damage the vehicle by outputting excessive driving torque to the entire vehicle. Therefore, it is necessary to send a drive power limitation instruction to the drive side inverter to limit the maximum output torque that can be executed by the drive side motor system, so that the driving torque of the vehicle can be limited in the event of abnormal high-voltage power failure, thereby ensuring the safety of vehicle performance.

[0062] Optionally, the step of “S220, obtaining the maximum driving limit power of the drive-side inverter according to the obtained actual DC voltage of the bus, the preset target reference DC voltage of the bus and the maximum charging power of the generator” includes the following steps:

[0063] According to the obtained bus actual DC voltage Udc_fdb, the bus preset target reference DC voltage Udc_ref, and the generator maximum charging power P_max;

[0064] Get the maximum driving limit power P_lim of the driving side inverter,

[0065] P_lim=Udc_fdb / Udc_ref*P_max.

[0066] Specifically, in this embodiment, the maximum charging power P_max of the bus can be obtained through bench calibration testing; the vehicle controller takes into account the conversion efficiency and motor speed of the drive side motor system, and can obtain the maximum limited output torque that can be executed by the drive side motor system through the maximum drive limit power P_lim of the drive side inverter.

[0067] Optionally, after the step of “S100, obtaining the actual DC voltage of the bus and the preset target reference DC voltage of the bus”, the following steps are included:

[0068] S110, when it is detected that the actual DC voltage of the bus is greater than the preset DC undervoltage threshold of the bus and less than the preset DC overvoltage threshold of the bus, an external power generation torque command input by the vehicle controller is received;

[0069] S120: Controlling the generator to generate actual power generation torque according to the received external power generation torque command.

[0070] Specifically, in this embodiment, when it is detected that the actual DC voltage of the bus is greater than the preset DC undervoltage threshold of the bus and less than the preset DC overvoltage threshold of the bus, the external power generation torque command input by the vehicle controller is received, and the generator is controlled to generate the actual execution power generation torque according to the received external power generation torque command. Therefore, for a normal vehicle high-voltage system, the actual execution power generation torque generated by the generator comes from the external power generation torque command issued by the vehicle controller, and in the case of abnormal high-voltage power failure, the external power generation torque command input by the vehicle controller is stopped, and the actual execution power generation torque needs to be adjusted, so as to continuously provide a stable DC high-voltage input for the torque control of the drive-side inverter.

[0071] See also Figure 4 As shown, this embodiment also provides a generation-side inverter 500, including a data acquisition module 510, a threshold comparison module 520, a voltage regulation module 530 and a power generation torque module 540; the data acquisition module 510 is used to obtain the actual DC voltage of the bus and the preset target reference DC voltage of the bus; the threshold comparison module 520 is communicated with the data acquisition module 510, and is used to stop receiving the external power generation torque command input by the vehicle controller when it is detected that the actual DC voltage of the bus is greater than the preset DC overvoltage threshold of the bus, or the actual DC voltage of the bus is less than the preset DC undervoltage threshold of the bus; the voltage regulation module 530 is communicated with the data acquisition module 510, and is used to perform voltage proportional integral regulation according to the obtained actual DC voltage of the bus and the preset target reference DC voltage of the bus, so that the actual DC voltage of the bus adapts to the preset target reference DC voltage of the bus, and obtains the bus regulated output DC voltage; the power generation torque module 540 is communicated with the voltage regulation module 530, and is used to generate the actual execution power generation torque of the generator according to the obtained bus regulated output DC voltage.

[0072] Also includes:

[0073] The driving power limiting module 550 is communicatively connected with the data acquisition module 510 and the threshold comparison module 520, and is used to obtain the maximum charging power of the generator, and obtain the maximum driving power limiting power of the driving side inverter according to the obtained actual DC voltage of the bus, the preset target reference DC voltage of the bus and the maximum charging power of the generator, and send a driving power limiting instruction to the driving side inverter according to the obtained maximum power limiting power of the driving side inverter.

[0074] The external power generation torque instruction acquisition module 560 is communicatively connected to the data acquisition module 510, and is used for receiving the external power generation torque instruction input by the vehicle controller when the actual DC voltage of the bus is greater than the preset DC undervoltage threshold of the bus and less than the preset DC overvoltage threshold of the bus, and the generator generates the actual execution power generation torque according to the received external power generation torque instruction.

[0075] The voltage regulation module 530 includes a first voltage regulation module and a second voltage regulation module; the first voltage regulation module is used to reduce the target reference power generation torque and the target reference charging power of the generator by performing voltage proportional integral adjustment on the actual DC voltage of the bus and the preset target reference DC voltage of the bus when it is detected that the actual DC voltage of the bus is greater than the preset target reference DC voltage of the bus, so that the voltage value of the actual DC voltage of the bus drops to the voltage value of the preset target reference DC voltage of the bus, and the bus regulated output DC voltage is obtained; the second voltage regulation module is used to increase the target reference power generation torque and the target reference charging power of the generator by performing voltage proportional integral adjustment on the actual DC voltage of the bus and the preset target reference DC voltage of the bus when it is detected that the actual DC voltage of the bus is less than the preset target reference DC voltage of the bus, so that the voltage value of the actual DC voltage of the bus rises to the voltage value of the preset target reference DC voltage of the bus, and the bus regulated output DC voltage is obtained.

[0076] For the inverter on the generating side, first, the data acquisition module 510 acquires the actual DC voltage of the bus and the preset target reference DC voltage of the bus; when the threshold comparison module 520 detects that the actual DC voltage of the bus is greater than the preset DC overvoltage threshold of the bus, or detects that the actual DC voltage of the bus is less than the preset DC undervoltage threshold of the bus, it stops receiving the external power generation torque command input by the vehicle controller; then the voltage regulation module 530 performs voltage proportional integral regulation according to the obtained actual DC voltage of the bus and the preset target reference DC voltage of the bus, so that the actual DC voltage of the bus adapts to the preset target reference DC voltage of the bus, and obtains the bus regulated output DC voltage; then the power generation torque module 540 adjusts the output DC voltage of the bus according to the obtained bus, and the generator generates the actual execution power generation torque. Therefore, by real-time monitoring of the actual bus DC voltage overvoltage or undervoltage fault, the external power generation torque command input by the vehicle controller is stopped, and then the actual bus DC voltage and the bus preset target reference DC voltage are adjusted by voltage proportional integral, so as to adjust the actual execution power generation torque and realize the stable control input of the bus DC high voltage; therefore, through the obtained bus regulated output DC voltage, the generator generates the actual execution power generation torque, which can continuously provide stable DC high voltage input for the torque control of the drive side inverter, so that the vehicle traction power is not interrupted.

[0077] Specifically, the functions of each module in this embodiment have been described in detail in the corresponding method embodiment, so they will not be described one by one.

[0078] This embodiment further provides a power generation side system, including: an engine 700, a generator 600 drivingly connected to the engine 700, and a power generation side inverter 500 as described above, which is communicatively connected to the generator 600.

[0079] Based on the same inventive concept, an embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, all or part of the method steps of the above method are implemented.

[0080] The present invention implements all or part of the process in the above method, and can also be completed by instructing related hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of each of the above method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, USB flash drive, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electric carrier signals and telecommunication signals.

[0081] Based on the same inventive concept, an embodiment of the present application also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program running on the processor, and when the processor executes the computer program, all or part of the method steps in the above method are implemented.

[0082] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of a computer device, and uses various interfaces and lines to connect various parts of the entire computer device.

[0083] The memory can be used to store computer programs and / or modules. The processor realizes various functions of the computer device by running or executing the computer programs and / or modules stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system and at least one application required for a function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the mobile phone (such as audio data, video data, etc.). In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0084] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, servers or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program codes.

[0085] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), servers, and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as a combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0086] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0087] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0088] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A high voltage abnormal power failure safety control method, characterized in that: The following steps are involved: Obtain the actual DC voltage of the bus and the preset target reference DC voltage of the bus; When it is detected that the actual DC voltage of the bus is greater than the preset DC overvoltage threshold of the bus, or when it is detected that the actual DC voltage of the bus is less than the preset DC undervoltage threshold of the bus, the external power generation torque command input by the vehicle controller is stopped; Obtain the maximum charging power of the generator, and obtain the maximum driving limit power of the drive-side inverter according to the obtained actual DC voltage of the bus, the preset target reference DC voltage of the bus and the maximum charging power of the generator, and send a driving limit power instruction to the drive-side inverter according to the obtained maximum limit power of the drive-side inverter, wherein P_lim=Udc_fdb / Udc_ref*P_max, P_lim represents the maximum limit power of the drive-side inverter, Udc_fdb represents the actual DC voltage of the bus, Udc_ref represents the preset target reference DC voltage of the bus, and P_max represents the maximum charging power of the generator; Perform voltage proportional integral regulation according to the obtained actual DC voltage of the bus and the preset target reference DC voltage of the bus, so that the actual DC voltage of the bus adapts to the preset target reference DC voltage of the bus, and obtains the bus regulated output DC voltage; The bus bar adjusts the output DC voltage obtained and controls the generator to produce the actual generating torque.

2. The high voltage abnormal power failure safety control method according to claim 1, characterized in that: The step of "performing voltage proportional integral regulation according to the obtained actual DC voltage of the bus and the preset target reference DC voltage of the bus, so that the actual DC voltage of the bus adapts to the preset target reference DC voltage of the bus, and obtaining the bus regulated output DC voltage" includes the following steps: When it is detected that the obtained bus actual DC voltage is greater than the bus preset target reference DC voltage, the target reference generating torque of the generator and the target reference charging power of the generator are reduced by performing voltage proportional integral adjustment on the bus actual DC voltage and the bus preset target reference DC voltage, so that the voltage value of the bus actual DC voltage drops to the voltage value of the bus preset target reference DC voltage, and the bus regulated output DC voltage is obtained; When it is detected that the obtained actual DC voltage of the bus is less than the preset target reference DC voltage of the bus, the voltage proportional integral adjustment is performed on the actual DC voltage of the bus and the preset target reference DC voltage of the bus to increase the target reference generating torque of the generator and the target reference charging power of the generator, so that the voltage value of the actual DC voltage of the bus rises to the voltage value of the preset target reference DC voltage of the bus, and the bus regulated output DC voltage is obtained.

3. The high voltage abnormal power failure safety control method according to claim 1, characterized in that: After the step of "obtaining the actual DC voltage of the bus and the preset target reference DC voltage of the bus", the following steps are included: When it is detected that the actual DC voltage of the bus is greater than the preset DC undervoltage threshold of the bus and less than the preset DC overvoltage threshold of the bus, an external power generation torque command input by the vehicle controller is received; According to the received external power generation torque command, the generator is controlled to generate the actual power generation torque.

4. A power generation side inverter, characterized in that: include: A data acquisition module is used to obtain the actual DC voltage of the bus and the preset target reference DC voltage of the bus; A threshold comparison module is in communication with the data acquisition module and is used to stop receiving the external power generation torque command input by the vehicle controller when it is detected that the actual DC voltage of the bus is greater than the preset DC overvoltage threshold of the bus, or when it is detected that the actual DC voltage of the bus is less than the preset DC undervoltage threshold of the bus; A voltage regulation module, which is in communication with the data acquisition module and is used to perform voltage proportional integral regulation according to the obtained actual DC voltage of the bus and the preset target reference DC voltage of the bus, so that the actual DC voltage of the bus adapts to the preset target reference DC voltage of the bus, and obtains the bus regulated output DC voltage; A power generation torque module, which is in communication with the voltage regulation module and is used to adjust the output DC voltage according to the obtained busbar, and control the generator to generate actual power generation torque; The driving limiting power module is communicatively connected with the data acquisition module and the threshold comparison module, and is used to obtain the maximum charging power of the generator, and obtain the maximum driving limiting power of the driving side inverter according to the obtained actual DC voltage of the bus, the preset target reference DC voltage of the bus and the maximum charging power of the generator, and send a driving limiting power instruction to the driving side inverter according to the obtained maximum limiting power of the driving side inverter, wherein P_lim=Udc_fdb / Udc_ref*P_max, P_lim represents the maximum limiting power of the driving side inverter, Udc_fdb represents the actual DC voltage of the bus, Udc_ref represents the preset target reference DC voltage of the bus, and P_max represents the maximum charging power of the generator.

5. The power generation side inverter according to claim 4, characterized in that: The voltage regulating module includes a first voltage regulating module and a second voltage regulating module; The first voltage regulating module is used for, when it is detected that the obtained bus actual DC voltage is greater than the bus preset target reference DC voltage, to reduce the target reference generating torque and target reference charging power of the generator by performing voltage proportional integral regulation on the bus actual DC voltage and the bus preset target reference DC voltage, so that the voltage value of the bus actual DC voltage drops to the voltage value of the bus preset target reference DC voltage, and obtain the bus regulated output DC voltage; The second voltage regulation module is used to increase the target reference generating torque of the generator and the target reference charging power of the generator by performing voltage proportional integral regulation on the actual DC voltage of the bus and the preset target reference DC voltage of the bus when it is detected that the actual DC voltage of the bus is less than the preset target reference DC voltage of the bus, so that the voltage value of the actual DC voltage of the bus rises to the voltage value of the preset target reference DC voltage of the bus, and the bus regulated output DC voltage is obtained.

6. The power generation side inverter according to claim 4, characterized in that: The generator-side inverter also includes an external power generation torque instruction acquisition module that is communicatively connected to the data acquisition module. The external power generation torque instruction acquisition module is used to receive the external power generation torque instruction input by the vehicle controller when the actual DC voltage of the bus is greater than the preset DC undervoltage threshold of the bus and less than the preset DC overvoltage threshold of the bus, and control the generator to generate actual execution power generation torque according to the received external power generation torque instruction.

7. A power generation system, characterized in that: include: An engine, a generator drivingly connected to the engine, and a power generation-side inverter as described in any one of claims 4 to 6 above, which is communicatively connected to the generator.

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