Power supply system operation method and device and vehicle

Abstract

The invention provides a power supply system operation method and device and a vehicle, and relates to the technical field of electrical sampling, and the method comprises the steps: determining an associated sampling point of a target sampling point under the condition that the sampling of any target sampling point in a power supply system is abnormal; determining target sampling information of the target sampling point based on the sampling information of the associated sampling point; and operating the power supply system based on the target sampling information. According to the algorithm-based compensation mechanism provided by the invention, the power supply system can realize rapid recovery and processing of sampling failure under the condition of not depending on physical redundancy, the robustness of the whole system is remarkably improved, challenges caused by hardware failure or sampling abnormity can be effectively dealt with, and the reliability of the system is improved. And the power supply system can be always kept stable operation in various complex environments.

Description

Technical Field

[0001] The present disclosure relates to the field of electrical sampling technology, and in particular to a power supply system operation method, device and vehicle. Background Art

[0002] With the rapid development of electric vehicles and new energy vehicles, the application of on-board power systems in vehicles is becoming more and more extensive. In order to achieve stable and efficient power conversion, the on-board power system relies on multiple sampling points for real-time monitoring and feedback of key parameters such as current and voltage.

[0003] In related technologies, failure of any sampling point will affect the stable operation of the power supply system and even cause system crash, which will seriously affect the safety of the entire vehicle. Summary of the invention

[0004] The embodiments of the present disclosure provide a power system operation method, device and vehicle, aiming to solve the problems existing in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present disclosure is implemented as follows: In a first aspect, an embodiment of the present disclosure provides a method for operating a power supply system, the method comprising: In the event that a sampling anomaly occurs at any target sampling point in the power supply system, determining a sampling point associated with the target sampling point; Determining target sampling information of the target sampling point based on the sampling information of the associated sampling point; The power supply system is operated based on the target sampling information.

[0006] Optionally, determining the associated sampling point of the target sampling point includes: Determine the first sampling point in the power supply system that is electrically coupled to the target sampling point as an associated sampling point of the target sampling point; or, A second sampling point set by another controller for the sampling position where the target sampling point is located is determined as an associated sampling point of the target sampling point, wherein the other controller is a controller other than the power supply system and communicates with the power supply system.

[0007] Optionally, the determining the target sampling information of the target sampling point based on the sampling information of the associated sampling point includes: Determine the estimated information of the target sampling point based on the sampling information of the first sampling point, and determine the target sampling information of the target sampling point based on the estimated information; or Based on the sampling information of the second sampling point, target sampling information of the target sampling point is determined.

[0008] Optionally, the target sampling point is any one of an input side voltage sampling point, an input side current sampling point, an output side voltage sampling point and an output side current sampling point of a target converter; the first sampling point is any other sampling point among the input side current sampling point, the input side voltage sampling point, the output side voltage sampling point and the output side current sampling point except the target sampling point; The determining, based on the sampling information of the first sampling point, the estimated information of the target sampling point includes: Determine the voltage value or current value of the target sampling point based on the voltage value and the current value of the first sampling point; The voltage value or the current value of the target sampling point is determined as the estimated information of the target sampling point.

[0009] Optionally, the determining the target sampling information of the target sampling point based on the sampling information of the second sampling point includes: In the case where the target sampling point is a current sampling point, determining target sampling information of the target sampling point based on the current value of the second sampling point; In the case where the target sampling point is a voltage sampling point, the target sampling information of the target sampling point is determined based on the voltage value of the second sampling point.

[0010] Optionally, determining the target sampling information of the target sampling point based on the estimated information includes: Based on the safety factor, the estimated information is corrected to obtain target estimated information; the safety factor is used to limit the target sampling information to be within the sampling interval of the target sampling point; The target estimation information is determined as the target sampling information of the target sampling point.

[0011] Optionally, the determining the target sampling information of the target sampling point based on the sampling information of the second sampling point includes: Based on the correction coefficient, the sampling information of the second sampling point is corrected to obtain target correction information; the correction coefficient is determined according to the signal transmission loss between the target sampling point and the second sampling point; The target correction information is determined as the target sampling information of the target sampling point.

[0012] Optionally, when a sampling abnormality occurs at any target sampling point in the power supply system, the method further includes: Switching the sampling channel of the target sampling point to a preset standby sampling channel; The sampling information acquired by the standby sampling channel at the target sampling point is used as the target sampling information of the target sampling point, and the power supply system is operated based on the target sampling information.

[0013] In a first aspect, an embodiment of the present disclosure provides a power system operation device, the device comprising: A first determination module is used to determine the associated sampling points of any target sampling point in the power supply system when a sampling anomaly occurs at the target sampling point in the power supply system; A second determination module, configured to determine target sampling information of the target sampling point based on the sampling information of the associated sampling point; An operation module is used to operate the power supply system based on the target sampling information.

[0014] Optionally, the first determining module includes: an associated sampling point determination submodule, configured to determine a first sampling point in the power supply system that is electrically coupled to the target sampling point as an associated sampling point of the target sampling point; or The second sampling point set by other controllers for the sampling position where the target sampling point is located is determined as the associated sampling point of the target sampling point.

[0015] Optionally, the second determining module includes: a target sampling information determination submodule, configured to determine the estimated information of the target sampling point based on the sampling information of the first sampling point, and determine the target sampling information of the target sampling point based on the estimated information; or Based on the sampling information of the second sampling point, target sampling information of the target sampling point is determined.

[0016] Optionally, the target sampling point is any one of an input side voltage sampling point, an input side current sampling point, an output side voltage sampling point and an output side current sampling point of a target converter; the first sampling point is other sampling points among the input side current sampling point, the input side voltage sampling point, the output side voltage sampling point and the output side current sampling point except the target sampling point; the other controller is a controller other than the power supply system that communicates with the power supply system; The target sampling information determination submodule includes: a first sampling information determining unit, configured to determine a voltage value or a current value of the target sampling point based on the voltage value and the current value of the first sampling point; The first determining unit is configured to determine the voltage value or the current value of the target sampling point as the estimated information of the target sampling point.

[0017] Optionally, the target sampling information determination submodule includes: a second determining unit, configured to determine target sampling information of the target sampling point based on a current value of the second sampling point when the target sampling point is a current sampling point; The third determining unit is configured to determine target sampling information of the target sampling point based on the voltage value of the second sampling point when the target sampling point is a voltage sampling point.

[0018] Optionally, the target sampling information determination submodule includes: A first correction unit, configured to correct the estimated information based on a safety factor to obtain target estimated information; the safety factor is used to limit the target sampling information to be within a sampling interval of the target sampling point; The fourth determining unit is configured to determine the target estimation information as the target sampling information of the target sampling point.

[0019] Optionally, the second determining module includes: Based on the correction coefficient, the sampling information of the second sampling point is corrected to obtain target correction information; the correction coefficient is determined according to the signal transmission loss between the target sampling point and the second sampling point; The target correction information is determined as the target sampling information of the target sampling point.

[0020] Optionally, the device further comprises: A switching module, used to switch the sampling channel of the target sampling point to a preset standby sampling channel; The standby operation module is used to use the sampling information obtained by the standby sampling channel at the target sampling point as the target sampling information of the target sampling point, and operate the power supply system based on the target sampling information.

[0021] In a third aspect, an embodiment of the present disclosure provides a vehicle, wherein the vehicle is used to execute the power system operation method as described in the first aspect.

[0022] The technical solution provided by the embodiments of the present disclosure brings at least the following beneficial effects: When an abnormality occurs at any sampling point of the power supply system, the present disclosure can automatically identify and determine other sampling points associated with the sampling point, and use the sampling information of these associated sampling points to infer the relevant data of the failed sampling point, thereby continuing to ensure the normal operation of the power supply system. The algorithm-based compensation mechanism proposed in the present disclosure enables the power supply system to quickly recover and handle sampling failures without relying on physical redundancy, significantly improving the robustness of the overall system, and can effectively cope with the challenges brought by hardware failures or sampling anomalies, ensuring that the power supply system can always maintain stable operation in various complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the steps of a power system operation method provided by an embodiment of the present disclosure; Figure 2 is a schematic diagram of sampling points of a power supply system in one embodiment of the present disclosure; Figure 3 It is a schematic diagram of the overall flow of a power system operation method provided by an embodiment of the present disclosure; Figure 4 It is a structural block diagram of a power system operating device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0026] With the rapid development of electric vehicles and new energy vehicles, the application of on-board power systems in vehicles is becoming more and more extensive. In order to ensure the stability and efficiency of the power system, the traditional on-board power system relies on multiple sampling points to monitor and feedback key parameters such as current and voltage in real time. These sampling points are usually composed of multiple components such as sensors, resistors, operational amplifiers, isolation chips, etc. However, the failure of any component or the failure of the sampling signal may cause the failure of the entire sampling loop, thereby affecting the normal operation of the power system and even causing the system to crash. The system failure problem caused by the failure of this single sampling point seriously affects the reliability and safety of the on-board power system. In response to these problems, the core idea of ​​the present disclosure is to use the algorithm compensation mechanism to use the information of other sampling points to infer the relevant data of the failed sampling point in the case of sampling point failure, thereby ensuring the normal operation of the power system, without relying on additional hardware redundancy design, significantly reducing costs, while improving the robustness and fault tolerance of the system, ensuring the efficient and stable operation of the power system, so as to solve the shortcomings of traditional methods.

[0027] Figure 1 This is a schematic diagram of a method for operating a power system according to an embodiment of the present disclosure. Figure 1 , the method comprising: Step S101: when a sampling abnormality occurs at any target sampling point in a power supply system, determining a sampling point associated with the target sampling point.

[0028] The target sampling points may be sampling points distributed at various sampling locations in the power supply system. Figure 2 is a schematic diagram of sampling points of a power supply system in one embodiment of the present disclosure, Figure 2 The serial numbers of the table 1 correspond to each other. Figure 2 and Table 1, AC side voltage sampling point (U AC ) is the sampling point for measuring the AC input voltage of the power system. The AC side current sampling point (IAC) is the sampling point for measuring the AC input current of the power system. The HVDC (high voltage direct current) side OBC (on-board charger) current sampling point (IHVOBC) is the sampling point for measuring the OBC current on the HVDC side. The HVDC side voltage sampling point (UHVDC) is the sampling point for measuring the voltage on the high voltage direct current side. The HVDC side DC / DC current sampling point (I HVDCDC ) is the sampling point for measuring the current of the DC / DC converter on the high-voltage DC side. The LV side voltage sampling point (U LV ) is the sampling point for measuring the voltage on the low voltage (LV) side, and the current sampling point on the LV side (I LV ) is the sampling point for measuring the current on the low voltage side. The target sampling point is any of the above sampling points.

[0029]

[0030] Table 1 The associated sampling points are other sampling points that are electrically associated with the target sampling point. That is, when the target sampling point fails, information provided by at least one associated sampling point of the target sampling point can be used for inference and calculation, thereby indirectly obtaining the value of the target sampling information.

[0031] Step S102: determining target sampling information of the target sampling point based on the sampling information of the associated sampling point.

[0032] The sampling information of the associated sampling points is used as a data source for indirectly deriving the sampling information of the target sampling points. In this embodiment, the algorithm scheme for determining the target sampling information of the target sampling points based on the sampling information of the associated sampling points is divided into a substitution type and a calculation type. Each sampling point corresponds to one or more applicable algorithm schemes at its respective sampling position. In practical applications, the state of the power supply system changes dynamically. Therefore, when calculating the sampling information of the target sampling point, it is necessary to monitor the sampling information of the associated sampling points in real time. The calculation process in step S102 is not just a one-time calculation, but a dynamic update and real-time calculation based on the real-time changes of the sampling information to ensure that the calculation result is consistent with the actual operating state of the system.

[0033] Step S103: operating the power supply system based on the target sampling information.

[0034] The target sampling information is input into the control system of the power supply system for further control decisions and optimized operation. The control system adjusts or optimizes the operating state of the power supply system according to the target sampling information. If the target sampling point is a voltage sampling or current sampling point, the control system can adjust the power output of the power supply according to the target sampling information. For example, if the calculated AC voltage is different from the expected value, the control system can adjust the output voltage or current of the power supply to maintain the required power level. If the target sampling information has a large deviation or is unstable, the control system will trigger the protection mechanism and enter the fault protection mode to avoid damage to other parts of the power supply system. In other words, the control system will run the corresponding control algorithm according to the target sampling information and make adjustment decisions.

[0035] When an abnormality occurs at any sampling point of the power supply system, the present disclosure can automatically identify and determine other sampling points associated with the sampling point, and use the sampling information of these associated sampling points to infer the relevant data of the failed sampling point, thereby continuing to ensure the normal operation of the power supply system. The algorithm-based compensation mechanism proposed in the present disclosure enables the power supply system to quickly recover and handle sampling failures without relying on physical redundancy, significantly improving the robustness of the overall system, and can effectively cope with the challenges brought by hardware failures or sampling anomalies, ensuring that the power supply system can always maintain stable operation in various complex environments.

[0036] In an optional implementation, the determining the associated sampling point of the target sampling point includes: Determine the first sampling point in the power supply system that is electrically coupled to the target sampling point as an associated sampling point of the target sampling point; or, A second sampling point set by another controller for the sampling position where the target sampling point is located is determined as an associated sampling point of the target sampling point, wherein the other controller is a controller other than the power supply system and communicates with the power supply system.

[0037] Electrical coupling refers to the direct physical electrical connection or functional electrical association or dependency between multiple sampling points in the power supply system. The first sampling point is a sampling point that generates an electrical input and output relationship, or a power input and output relationship, based on the interaction of current and voltage with the target sampling point. Assuming that the target sampling point is the AC side voltage sampling point, since there is an electrical coupling relationship between the AC side voltage sampling point and the AC side current sampling point, specifically, the relationship between the AC side current sampling point and the AC side voltage sampling point can be expressed by a power formula. Since the system follows the law of conservation of energy, assuming that efficiency loss and other complex factors are ignored, the input power and output power of the power supply system are equal. The relationship between the AC side voltage sampling point and the AC side voltage sampling point is an electrical coupling relationship, because they are connected in the same AC power supply circuit through corresponding electrical components (such as transformers, current sensors, etc.), therefore, the AC side voltage sampling point is the second sampling point. Through the law of conservation of energy, the dependency between voltage and current can be inferred. It can be understood that the first sampling point can be one or more, and the sampling information of the target sampling point can be inferred based on the electrical coupling relationship between at least one first sampling point and the target sampling point.

[0038] In the control strategy of the power system, multiple other controllers may be set near the target sampling point or at the same sampling position for sampling. The sampling points of these other controllers are the second sampling points. Other controllers refer to controllers outside the power system that communicate or interact with the power system, including but not limited to: battery management system (BMS), motor control unit (MCU), body control module (BCM) and other key control units of the vehicle power system. Assume that the target sampling point is the high-voltage DC side voltage sampling point UHVDC, which is used to monitor the high-voltage DC bus voltage on the battery management system (BMS). In the power system, the battery management system (BMS) also needs to monitor and control the high-voltage DC voltage, and the BMS will set a second sampling point at the same position to obtain the bus voltage and transmit the voltage value to other controllers, including the power management system, through the CAN bus. When the UHVDC sampling point in the power system fails, the function of UHVDC can be replaced by the second sampling point of the BMS. Since the BMS and the power system collect data at the same voltage position, it can be understood that the sampling information provided by the BMS can be used as an equivalent replacement for the sampling information of UHVDC.

[0039] In an optional implementation, the determining the target sampling information of the target sampling point based on the sampling information of the associated sampling point includes: Based on the sampling information of the first sampling point, the estimated information of the target sampling point is determined, and based on the estimated information, the target sampling information of the target sampling point is determined.

[0040] As mentioned above, the extrapolation method is based on the law of conservation of energy in the power supply system, and the value of the target sampling point is extrapolated through the data of at least one first associated sampling point. There is an electrical coupling relationship between the target sampling point and the first sampling point (for example, the relationship between voltage and current, or the relationship between input and output power). The extrapolated information is an estimated value of the target sampling point calculated from the sampling information of the existing first sampling point, and the extrapolated information can be voltage, current or other parameters. If the target sampling point is an AC current sampling point, and the first sampling point is an AC voltage sampling point, the extrapolated information can be extrapolated through the power relationship.

[0041] Alternatively, target sampling information of the target sampling point is determined based on the sampling information of the second sampling point.

[0042] The substitution rule is to replace the failed target sampling point data with the sampling information provided by the second sampling point set by other controllers at the sampling position where the target sampling point is located. If the target sampling point fails, the second sampling point can be used to provide alternative sampling information. Assume that the target sampling point is the HVDC side voltage sampling point, and the BMS (battery management system) will also collect high-voltage DC voltage at the same location. Since the power system and the BMS system are connected to each other through the CAN bus, the power system can obtain the BMS data to replace the sampling information of the originally failed UHVDC sampling point.

[0043] Please refer to Table 2. Different sampling points are applicable to one or both of the above algorithm schemes. The serial numbers in Table 2 are the same as Figure 2 The serial numbers shown correspond one to one.

[0044]

[0045] Table 2 In summary, the extrapolation method relies on the sampling points of electrical coupling in the system (such as the relationship between voltage and current) to deduce the estimated information of the failed sampling points through calculation. The advantage of the extrapolation method is that it can accurately deduce through the known electrical coupling relationship without adding additional hardware, but it has high requirements on the relationship between the various sampling points in the power supply system. The substitution method replaces the failed target sampling points with redundant sampling data provided by other controllers (such as BMS, MCU, etc.). The advantage of the substitution method is that it can quickly use the existing redundant sampling points to replace the failed points, but there is a certain deviation. In order to improve the accuracy of the target sampling information, the embodiment of the present disclosure proposes that for the sampling points applicable to the two algorithm schemes, that is, the HVDC side voltage sampling points and the LV side voltage sampling points, a weighted average method is used to calculate the final target sampling information, that is, to combine the results of the extrapolation method and the substitution method. Specifically, the final target sampling information can be calculated according to certain weights based on the estimation results of the extrapolation method and the substitution method. Assume that the weight is and ,in, is the weight of the inference algorithm, is the weight of the substitution method, and The final target sampling information It can be calculated by the following formula: (1); in: is the value calculated by the extrapolation algorithm. is the value calculated by the substitution method. When assigning weights, since the calculation results of the substitution method may have certain errors caused by signal transmission (the correction method will be described in detail later), a higher weight can be assigned to the inference method and a lower weight can be assigned to the substitution method.

[0046] In an optional implementation, the target sampling point is any one of an input side voltage sampling point, an input side current sampling point, an output side voltage sampling point, and an output side current sampling point of a target converter; and the first sampling point is any other sampling point among the input side current sampling point, the input side voltage sampling point, the output side voltage sampling point, and the output side current sampling point except the target sampling point.

[0047] Defined from the perspective of the input side and the output side, the target sampling point is any one of the four key sampling points in the power supply system, namely the input side voltage sampling point, the input side current sampling point, the output side voltage sampling point and the output side current sampling point. Relatively speaking, the first sampling point is the other three sampling points except the target sampling point. Assuming that the target sampling point is the input side voltage sampling point, the first sampling point may be any one of the input side current sampling point, the output side voltage sampling point and the output side current sampling point.

[0048] The determining, based on the sampling information of the first sampling point, the estimated information of the target sampling point includes: Based on the voltage value and the current value of the first sampling point, the voltage value or the current value of the target sampling point is determined.

[0049] During the inference process, the voltage value or current value (one of the two) of the target sampling point will be inferred. The specific inference process depends on the electrical relationship between the target sampling point and the first sampling point. If the target sampling point is the input voltage of the power supply, the first sampling point may be the input current and output voltage, and the input voltage is inferred using the known power conversion relationship. Similarly, if the target sampling point is the output current of the power supply, the first sampling point may be the input voltage and output voltage, and the output current is inferred through the relationship between current, voltage and power. In other words, the voltage or current of the target sampling point is calculated using the known input / output electrical relationship combined with the voltage or current information of the first sampling point.

[0050] The voltage value or the current value of the target sampling point is determined as the estimated information of the target sampling point.

[0051] The voltage or current of the target sampling point will be calculated and determined as the calculated information of the target sampling point. This means that the calculated information is the estimated value of the voltage or current of the target sampling point obtained by calculation based on the data of the first sampling point. Assume that the target sampling point is the AC side voltage sampling point, and the first sampling point is the HVDC side OBC current sampling point and the HVDC side voltage sampling point. According to the known power conversion relationship, the sampling information of the AC side voltage sampling point is calculated according to the following formula: (2); In the formula, is the voltage value obtained at the voltage sampling point on the HVDC side, is the current value obtained by the OBC current sampling point on the HVDC side, is the current value obtained by the current sampling point on the AC side, is the conversion efficiency of the power supply. According to the law of conservation of energy, ideally, the input power and output power should be equal. With the known input current, output current and voltage information, the sampling information of the failed input side voltage sampling point can be calculated: input voltage Considering that there is always a certain amount of energy loss during the power conversion process, the power conversion efficiency Used to adjust calculation results.

[0052] In an optional implementation, the determining the target sampling information of the target sampling point based on the sampling information of the second sampling point includes: In the case where the target sampling point is a current sampling point, determining target sampling information of the target sampling point based on the current value of the second sampling point; In the case where the target sampling point is a voltage sampling point, the target sampling information of the target sampling point is determined based on the voltage value of the second sampling point.

[0053] The core idea of ​​the substitution method is to use the voltage or current information of the second sampling point to replace the failure information of the target sampling point. According to the electrical relationship in the power supply system (such as the proportional relationship between voltage and current), the sampling information of the target sampling point can be inferred or directly obtained through the known sampling information of the second sampling point. If the target sampling point is a current sampling point (such as input current, output current, etc.), then the current information of the second sampling point can replace the current value of the target sampling point according to the electrical relationship in the system. If the target sampling point is a voltage sampling point (such as input voltage, output voltage, etc.), and the second sampling point provides current information, then the voltage-current relationship in the power supply system can also be used for substitution.

[0054] Figure 3 This is a schematic diagram of the overall flow of a power system operation method provided by an embodiment of the present disclosure, see Figure 3At the beginning of the power supply system power-on, the first is the initialization phase of the power supply system. At this time, the power supply system and all related hardware components (such as sensors, controllers, etc.) are started, and the power supply system begins to perform initialization self-test and is ready to enter the normal working state. After starting up, it starts to prepare for sampling. After the power supply system enters the working state, it performs sampling state detection. If it is detected that all sampling points are working normally, the control operation of the power supply system will continue to be executed. If an abnormality is found in a sampling point (such as sensor failure, data loss or signal distortion, etc.), emergency measures will be taken and the abnormality handling process will be entered. If the sampling information of the target sampling point is detected to be abnormal during the sampling state detection phase, a suitable algorithm scheme (inference algorithm or substitution method) is selected according to the location of the abnormal sampling point, see Table 2. The power supply system continues to operate based on the sampling information obtained by the selected algorithm scheme. After the power supply system continues to operate, a secondary sampling state detection is performed to ensure that no new abnormalities will occur in the data of the sampling points during the continuous operation of the power supply system. If the system finds that the data of all sampling points are still normal in the secondary sampling state detection, the power supply system continues to be controlled based on the sampling information of the target sampling point to maintain the normal operation of the system. If abnormal sampling points are still found in the secondary sampling state detection, the power supply system will enter the shutdown state and select the inference algorithm or substitution method again according to the location of the sampling point. The shutdown is to prevent the system from continuing to run when the sampling data is wrong or missing, which may cause other problems or safety risks. After the shutdown, the appropriate algorithm solution is selected according to the location of the target sampling point where the abnormality occurs. Through the above process, the present disclosure can ensure the safety and high robustness of the power supply system through redundant sampling and algorithm correction when the sampling point is abnormal.

[0055] In an optional implementation, determining the target sampling information of the target sampling point based on the estimated information includes: Based on the safety factor, the estimated information is corrected to obtain target estimated information; the safety factor is used to limit the target sampling information to be within the sampling interval of the target sampling point; The target estimation information is determined as the target sampling information of the target sampling point.

[0056] The safety factor is a parameter used to limit or correct the estimated information. When there may be errors or uncertainties in the estimated information, it ensures that the target information of the target sampling point does not deviate from the normal range. The safety factor ensures that the estimated target sampling information is within the predetermined safe working range, thereby ensuring the reliability and safety of the system. The role of the safety factor is to increase the fault tolerance of the system through certain corrections when the estimated information may contain errors, prevent the estimated information from exceeding the actual working range of the target sampling point, ensure that it is within a safe working range, and avoid potential failures or dangers. The safety factor takes a value between 0 and 1, indicating the degree of correction.

[0057] Finally, the corrected estimated information (i.e., target estimated information) is determined as the target sampling information of the target sampling point. The target estimated information will replace the sampling data that was originally lost due to sampling point failure, and continue to participate in subsequent system control, status monitoring, and fault diagnosis.

[0058] In an optional implementation, the determining the target sampling information of the target sampling point based on the sampling information of the second sampling point includes: Based on the correction coefficient, the sampling information of the second sampling point is corrected to obtain target correction information; the correction coefficient is determined according to the signal transmission loss between the target sampling point and the second sampling point; The target correction information is determined as the target sampling information of the target sampling point.

[0059] The correction coefficient is a factor used to correct the information of the second sampling point. Its function is to compensate for the difference caused by the signal transmission loss between the target sampling point and the second sampling point. Signal transmission loss is any attenuation, error or distortion that may occur during the signal transmission from the target sampling point to the second sampling point. For example, when the signal is transmitted through a long cable, it may be attenuated due to factors such as resistance; or, the signal may deviate from different sensors due to accuracy differences. In the case where the target sampling point is the HVDC side voltage sampling, taking the microcontroller MCU as an example, although the bus voltage will be collected, due to the certain wire distance between the power supply and the MCU, there will be a certain deviation in the voltage collection, so it can be corrected by the correction coefficient. The correction coefficient can be obtained by measurement or theoretical calculation, and the coefficient value can be adjusted by experimental verification.

[0060] Assume that the target sampling point fails and the target sampling point is the HVDC side voltage sampling point, and the output voltage is provided by other controllers or transmitted through the CAN bus. The sampling information of the input side voltage sampling point is determined according to the following formula: δ (3); In the formula, is the voltage value obtained by other controllers at the sampling position of the voltage sampling point on the HVDC side, δ is the correction factor.

[0061] The corrected second sampling point information (i.e., target correction information) is determined as the target sampling information of the target sampling point. That is, the corrected data becomes the replacement data of the target sampling point, ensuring that the system can continue to operate when the target sampling point fails. For example, if the target sampling point is the battery voltage sampling point, and the second sampling point is the power input voltage sampling point, after correction by the correction coefficient, an accurate battery voltage value can be obtained, so that the system can still work normally without direct battery voltage data.

[0062] By introducing the above-mentioned safety factor and correction factor, the robustness and fault tolerance of the system can be effectively improved. When hardware failure or sampling failure occurs, the system can still be kept running stably through mathematical correction.

[0063] In an optional implementation, when a sampling abnormality occurs at any target sampling point in the power supply system, the method further includes: Switching the sampling channel of the target sampling point to a preset standby sampling channel; The sampling information acquired by the standby sampling channel at the target sampling point is used as the target sampling information of the target sampling point, and the power supply system is operated based on the target sampling information.

[0064] In the power supply system, the sampling channel refers to the signal channel used to obtain and transmit the sampling point information. Each sampling point has a corresponding sampling channel, which is responsible for collecting signals and transmitting data to the control system. In this embodiment, the pre-establishment of a backup sampling channel is proposed, and the backup channel is a channel designed to ensure system redundancy and robustness. It can quickly switch to the main sampling channel when a sampling anomaly occurs at the target sampling point, and continue to provide the required sampling information. The backup sampling channel is usually connected to the same or similar electrical parameters as the target sampling point, but the sampling is performed through different sensors or lines.

[0065] When an abnormality occurs at the target sampling point, the sampling channel of the target sampling point can be automatically or manually switched to the backup sampling channel. The backup sampling channel is located at the same or similar electrical position as the target sampling point. The backup channel is independent of the target sampling channel in hardware, so even if the target sampling channel fails, the backup sampling channel can still work normally. The sampling information obtained by the backup sampling channel is the same type of data as the target sampling point (such as voltage, current, power, etc.). Once switched to the backup channel, the backup channel begins to take over the acquisition work and provides the sampling information originally responsible by the target sampling point.

[0066] The sampling information obtained by the backup sampling channel is determined as the target sampling information of the target sampling point. Although this data comes from the backup channel, its physical meaning and purpose are the same as the original sampling information of the target sampling point, so it can directly replace the data of the target sampling point for the normal operation of the power supply system.

[0067] Through redundant design, the power supply system can maintain stable operation in the event of sampling abnormalities, improving the system's fault tolerance and robustness.

[0068] Figure 4 is a structural block diagram of a power system operation device provided by an embodiment of the present disclosure, such as Figure 4 As shown, the device comprises: A first determination module 201 is used to determine the associated sampling points of any target sampling point in the power supply system when a sampling anomaly occurs at the target sampling point in the power supply system; A second determination module 202, configured to determine target sampling information of the target sampling point based on the sampling information of the associated sampling point; The operation module 203 is used to operate the power supply system based on the target sampling information.

[0069] In an optional implementation, the first determining module includes: an associated sampling point determination submodule, configured to determine a first sampling point in the power supply system that is electrically coupled to the target sampling point as an associated sampling point of the target sampling point; or A second sampling point set by another controller for the sampling position where the target sampling point is located is determined as an associated sampling point of the target sampling point, wherein the other controller is a controller other than the power supply system and communicates with the power supply system.

[0070] In an optional implementation, the second determining module includes: a target sampling information determination submodule, configured to determine the estimated information of the target sampling point based on the sampling information of the first sampling point, and determine the target sampling information of the target sampling point based on the estimated information; or Based on the sampling information of the second sampling point, target sampling information of the target sampling point is determined.

[0071] In an optional implementation, the target sampling point is any one of the input side voltage sampling point, the input side current sampling point, the output side voltage sampling point and the output side current sampling point of the target converter; the first sampling point is other sampling points among the input side current sampling point, the input side voltage sampling point, the output side voltage sampling point and the output side current sampling point except the target sampling point; The target sampling information determination submodule includes: a first sampling information determining unit, configured to determine a voltage value or a current value of the target sampling point based on the voltage value and the current value of the first sampling point; The first determining unit is configured to determine the voltage value or the current value of the target sampling point as the estimated information of the target sampling point.

[0072] In an optional implementation, the target sampling information determination submodule includes: a second determining unit, configured to determine target sampling information of the target sampling point based on a current value of the second sampling point when the target sampling point is a current sampling point; The third determining unit is configured to determine target sampling information of the target sampling point based on the voltage value of the second sampling point when the target sampling point is a voltage sampling point.

[0073] In an optional implementation, the target sampling information determination submodule includes: A first correction unit, configured to correct the estimated information based on a safety factor to obtain target estimated information; the safety factor is used to limit the target sampling information to be within a sampling interval of the target sampling point; The fourth determining unit is configured to determine the target estimation information as the target sampling information of the target sampling point.

[0074] In an optional implementation, the second determining module includes: Based on the correction coefficient, the sampling information of the second sampling point is corrected to obtain target correction information; the correction coefficient is determined according to the signal transmission loss between the target sampling point and the second sampling point; The target correction information is determined as the target sampling information of the target sampling point.

[0075] In an optional embodiment, the device further comprises: A switching module, used to switch the sampling channel of the target sampling point to a preset standby sampling channel; The standby operation module is used to use the sampling information obtained by the standby sampling channel at the target sampling point as the target sampling information of the target sampling point, and operate the power supply system based on the target sampling information.

[0076] The embodiment of the present disclosure also provides a vehicle, which is used to execute the power system operation method as described above.

[0077] It should be understood by those skilled in the art that the embodiments of the present disclosure may be provided as methods, devices, vehicles, and storage media. Therefore, the embodiments of the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the embodiments of the present disclosure may take the form of a computer program product implemented on one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0078] The embodiments of the present disclosure are described with reference to the flowcharts and / or block diagrams of the methods and devices according to the embodiments of the present disclosure. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the 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 terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal 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 These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing terminal device to work in a specific way, so that the instructions stored in the computer-readable memory produce a product including an instruction device, which implements the functions specified in the process. Figure 1 A process or multiple processes and / or boxes Figure 1 These computer program instructions can also be loaded into a computer or other programmable data processing terminal device, so that a series of operation steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable terminal device provide for implementing the process in the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0079] Although the preferred embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present disclosure.

[0080] Finally, it should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "include..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements. The above is a detailed introduction to a power system operation method, device and vehicle provided by the present disclosure. The principles and implementation methods of the present disclosure are explained in this article using specific examples. The description of the above embodiments is only used to help understand the method and its core idea of ​​the present disclosure; at the same time, for those of ordinary skill in the art, according to the idea of ​​the present disclosure, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present disclosure.

Claims

1. A method for operating a power supply system, characterized in that: The method comprises: In the event that a sampling anomaly occurs at any target sampling point in the power supply system, determining a sampling point associated with the target sampling point; Determining target sampling information of the target sampling point based on the sampling information of the associated sampling point; The power supply system is operated based on the target sampling information.

2. The method according to claim 1, characterized in that The step of determining the associated sampling point of the target sampling point includes: Determine the first sampling point in the power supply system that is electrically coupled to the target sampling point as an associated sampling point of the target sampling point; or, A second sampling point set by another controller for the sampling position where the target sampling point is located is determined as an associated sampling point of the target sampling point, wherein the other controller is a controller other than the power supply system and communicates with the power supply system.

3. The method according to claim 2, characterized in that The determining the target sampling information of the target sampling point based on the sampling information of the associated sampling point includes: Determine the estimated information of the target sampling point based on the sampling information of the first sampling point, and determine the target sampling information of the target sampling point based on the estimated information; or Based on the sampling information of the second sampling point, target sampling information of the target sampling point is determined.

4. The method according to claim 3, characterized in that The target sampling point is any sampling point among the input side voltage sampling point, the input side current sampling point, the output side voltage sampling point and the output side current sampling point of the target converter; the first sampling point is any sampling point among the input side current sampling point, the input side voltage sampling point, the output side voltage sampling point and the output side current sampling point except the target sampling point; The determining, based on the sampling information of the first sampling point, the estimated information of the target sampling point includes: Determine the voltage value or current value of the target sampling point based on the voltage value and the current value of the first sampling point; The voltage value or the current value of the target sampling point is determined as the estimated information of the target sampling point.

5. The method according to claim 4, characterized in that The determining, based on the sampling information of the second sampling point, target sampling information of the target sampling point includes: In the case where the target sampling point is a current sampling point, determining target sampling information of the target sampling point based on the current value of the second sampling point; In the case where the target sampling point is a voltage sampling point, the target sampling information of the target sampling point is determined based on the voltage value of the second sampling point.

6. The method according to claim 3, characterized in that The determining, based on the estimated information, target sampling information of the target sampling point includes: Based on the safety factor, the estimated information is corrected to obtain target estimated information; the safety factor is used to limit the target sampling information to be within the sampling interval of the target sampling point; The target estimation information is determined as the target sampling information of the target sampling point.

7. The method according to claim 3, characterized in that The determining, based on the sampling information of the second sampling point, target sampling information of the target sampling point includes: Based on the correction coefficient, the sampling information of the second sampling point is corrected to obtain target correction information; the correction coefficient is determined according to the signal transmission loss between the target sampling point and the second sampling point; The target correction information is determined as the target sampling information of the target sampling point.

8. The method according to claim 1, characterized in that In the case where a sampling anomaly occurs at any target sampling point in the power supply system, the method further includes: Switching the sampling channel of the target sampling point to a preset standby sampling channel; The sampling information acquired by the standby sampling channel at the target sampling point is used as the target sampling information of the target sampling point, and the power supply system is operated based on the target sampling information.

9. A power system operation device, characterized in that: The device comprises: A first determination module is used to determine the associated sampling points of any target sampling point in the power supply system when a sampling anomaly occurs at the target sampling point in the power supply system; A second determination module, configured to determine target sampling information of the target sampling point based on the sampling information of the associated sampling point; An operation module is used to operate the power supply system based on the target sampling information.

10. A vehicle, characterized in that: The vehicle is used to execute the power system operation method according to any one of claims 1-8.

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