Power supply intelligent protection control method and device and intelligent power supply

Abstract

The invention discloses a power supply intelligent protection control method and device and an intelligent power supply, and the method comprises the steps: carrying out the curve fitting of i historical voltages, and obtaining a historical voltage curve; performing curve fitting on the j historical currents to obtain a historical current curve; determining a first voltage curve of the intelligent power supply in a future time period according to the historical voltage curve; determining a first current curve of a future time period according to the historical current curve; determining an overvoltage protection threshold curve and an undervoltage protection threshold curve according to the load power curve of the future time period; determining an overcurrent protection threshold curve according to the load power curve; determining a target critical point according to the first voltage curve, the first current curve, the overvoltage protection threshold curve, the undervoltage protection threshold curve and the overcurrent protection threshold curve; and controlling the protection device to execute a power supply protection operation corresponding to the target critical point. The safety of the intelligent power supply can be improved.

Description

Technical Field

[0001] The present application relates to the field of power supply protection technology, and in particular to a power supply intelligent protection control method, device and intelligent power supply. Background Art

[0002] Smart power supply is a power supply device or system that integrates advanced electronic technology, control technology and communication technology and has intelligent functions. It can automatically adjust output parameters such as voltage and current according to the actual needs of the load to achieve precise power supply. For example, when the load power changes, the smart power supply can adjust the output voltage in real time to ensure stable operation of the load equipment.

[0003] When the intelligent power supply is used to supply power to the load equipment, it is necessary to monitor the operating status of the power supply in real time. Once overvoltage, undervoltage, overcurrent and other faults are detected, protective measures must be taken quickly and alarm signals must be issued in a timely manner. Through the network communication interface, users can view the operating parameters and status information of the power supply in real time on the remote terminal, and can also perform remote control and parameter settings.

[0004] In the prior art, protection measures are usually taken to protect the smart power supply only when a fault occurs in the smart power supply. The power supply protection is not timely and the safety of the power supply is low. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the embodiments of the present application provide a power supply intelligent protection control method, device and intelligent power supply. The first voltage curve of the intelligent power supply in the future time period is predicted by the historical voltage curve obtained by fitting the historical voltage of the intelligent power supply, and the first current curve of the intelligent power supply in the future time period is predicted by fitting the historical current curve obtained by fitting the historical current of the intelligent power supply. Then, according to the load power curve of the load device in the future time period, the overvoltage protection threshold curve, undervoltage protection threshold curve and overcurrent protection threshold curve of the intelligent power supply in the future time period are determined, so as to determine the target critical point according to the first voltage curve, the first current curve, the overvoltage protection threshold curve, the undervoltage protection threshold curve and the overcurrent protection threshold curve, and control the protection device to perform the power protection operation corresponding to the target critical point. In this way, the target critical point where an abnormality occurs in the future time period can be predicted in advance, and the power protection operation can be performed in advance to ensure the safety of the intelligent power supply.

[0006] In a first aspect, an embodiment of the present application provides a power supply intelligent protection control method, which is applied to a controller of an intelligent power supply, wherein the intelligent power supply is used to power a load device, and the intelligent power supply further includes: a voltage sensor, a current sensor, and a protection device; the method includes: Acquire a historical voltage data set collected by the voltage sensor and a historical current data set collected by the current sensor; the historical voltage data set includes i historical voltages, and the historical current data set includes j historical currents; i and j are both integers greater than or equal to 3; Performing curve fitting on the i historical voltages to obtain a historical voltage curve; Performing curve fitting on the j historical currents to obtain a historical current curve; Determine, according to the historical voltage curve, a first voltage curve of the smart power supply in a future time period; Determining, according to the historical current curve, a first current curve of the smart power supply in the future time period; Determining a load power curve of the load device in the future time period according to a preset power demand; Determining an overvoltage protection threshold curve and an undervoltage protection threshold curve of the smart power supply in the future time period according to the load power curve; Determining an overcurrent protection threshold curve of the smart power supply in the future time period according to the load power curve; Determine a target critical point according to the first voltage curve, the first current curve, the overvoltage protection threshold curve, the undervoltage protection threshold curve, and the overcurrent protection threshold curve; the target critical point is used to represent a point corresponding to a minimum time when an abnormality occurs in the first voltage curve and the first current curve; The protection device is controlled to perform a power protection operation corresponding to the target critical point.

[0007] In a second aspect, an embodiment of the present application provides a power supply intelligent protection control device, the device is located in an intelligent power supply, the intelligent power supply is used to power a load device, the intelligent power supply also includes: a voltage sensor, a current sensor and a protection device; the device includes: An acquisition unit, used to acquire a historical voltage data set collected by the voltage sensor and a historical current data set collected by the current sensor; the historical voltage data set includes i historical voltages, and the historical current data set includes j historical currents; i and j are both integers greater than or equal to 3; A processing unit, configured to perform curve fitting on the i historical voltages to obtain a historical voltage curve; Performing curve fitting on the j historical currents to obtain a historical current curve; Determine, according to the historical voltage curve, a first voltage curve of the smart power supply in a future time period; Determining, according to the historical current curve, a first current curve of the smart power supply in the future time period; Determining a load power curve of the load device in the future time period according to a preset power demand; Determining an overvoltage protection threshold curve and an undervoltage protection threshold curve of the smart power supply in the future time period according to the load power curve; Determining an overcurrent protection threshold curve of the smart power supply in the future time period according to the load power curve; Determine a target critical point according to the first voltage curve, the first current curve, the overvoltage protection threshold curve, the undervoltage protection threshold curve, and the overcurrent protection threshold curve; the target critical point is used to represent a point corresponding to a minimum time when an abnormality occurs in the first voltage curve and the first current curve; A control unit is used to control the protection device to perform a power supply protection operation corresponding to the target critical point.

[0008] In a third aspect, an embodiment of the present application provides an intelligent power supply, which is used to power a load device; the intelligent power supply includes: a controller, a voltage sensor, a current sensor and a protection device; the controller includes: a processor and a memory, the processor is connected to the memory, the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the intelligent power supply performs the method described in the first aspect.

[0009] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program is executed by a processor to implement the method described in the first aspect.

[0010] In a fifth aspect, an embodiment of the present application provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is executed by a processor to implement the method described in the first aspect.

[0011] Implementing the embodiments of the present application has the following beneficial effects: In an embodiment of the present application, the controller of the intelligent power supply first obtains a historical voltage data set collected by a voltage sensor and a historical current data set collected by a current sensor. Then, curve fitting is performed on i historical voltages in the historical voltage data set to obtain a historical voltage curve, and curve fitting is performed on j historical currents in the historical current data set to obtain a historical current curve, and the first voltage curve of the intelligent power supply in the future time period is determined according to the historical voltage curve, and the first current curve of the intelligent power supply in the future time period is determined according to the historical current curve. Next, according to the preset power demand, the load power curve of the load device in the future time period is determined, and according to the load power curve, the overvoltage protection threshold curve and the undervoltage protection threshold curve of the intelligent power supply in the future time period are determined, and according to the load power curve, the overcurrent protection threshold curve of the intelligent power supply in the future time period is determined. Further, according to the first voltage curve, the first current curve, the overvoltage protection threshold curve, the undervoltage protection threshold curve, and the overcurrent protection threshold curve, the target critical point is determined. Finally, the control protection device performs the power protection operation corresponding to the target critical point. Therefore, by predicting the voltage curve, current curve, overvoltage protection threshold curve and undervoltage protection threshold curve of the smart power supply in the future time period, the target critical point where the smart power supply will first show abnormality in the future time period can be predicted, so as to control the protection device in advance to perform the power protection operation corresponding to the target critical point, protect the smart power supply in time, and improve the safety of the power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 A schematic diagram of an application scenario of a power supply intelligent protection control method provided in an embodiment of the present application; Figure 2 A flowchart of a power supply intelligent protection control method provided in an embodiment of the present application; Figure 3 A schematic diagram of a historical voltage curve and a first voltage curve provided in an embodiment of the present application; Figure 4 A schematic diagram of a historical current curve and a first current curve provided in an embodiment of the present application; Figure 5 A schematic diagram of a load power curve provided in an embodiment of the present application; Figure 6 A schematic diagram of a method for determining a target critical point provided in an embodiment of the present application; Figure 7 A block diagram of the functional units of a power supply intelligent protection control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0015] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present application and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or modules is not limited to the listed steps or modules, but optionally includes steps or modules that are not listed, or optionally includes other steps or modules inherent to these processes, methods, products or devices.

[0016] Reference to "embodiments" herein means that a particular feature, result, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0017] First, see Figure 1 , Figure 1 A schematic diagram of an application scenario of a power supply intelligent protection control method provided in an embodiment of the present application. Figure 1 As shown, the intelligent power supply is connected to the load device through a wire, and is mainly used to supply power to the load device, wherein there may be multiple load devices, such as Figure 1 Three load devices are shown in FIG. 1 . The intelligent power supply may include: a controller, a voltage sensor, a current sensor, and a protection device. The voltage sensor, the current sensor, and the protection device are all connected to the controller through wires for communication.

[0018] Among them, the load device refers to a device that consumes electric energy in a circuit or receives electric energy from a power source and converts the electric energy into other forms of energy, such as electric lights, electric water heaters, elevators, etc. An intelligent power supply is a power supply device with intelligent functions that integrates power electronics technology, automatic control technology, sensor technology, communication technology, etc. An intelligent power supply can monitor its own operating parameters in real time, for example, monitor the output voltage through a voltage sensor, monitor the output current through a current sensor, and determine the output power of the intelligent power supply through the voltage collected by the voltage sensor and the current collected by the current sensor. Optionally, the intelligent power supply may also include a temperature sensor for monitoring the operating temperature of the intelligent power supply.

[0019] Among them, the controller is a key component of high-performance data analysis and processing in the intelligent power supply, which is mainly used to execute various control algorithms and instructions, analyze and process the collected data, and generate control signals according to preset rules, and send the control signals to other functional modules of the intelligent power supply to control the functional modules of the intelligent power supply. The controller may include at least one of the following: a single-chip microcomputer (Microcontroller Unit, MCU), a digital signal processor (Digital Signal Processor, DSP), a microprocessor unit (Microprocessor Unit, MPU), etc., which is not limited in this application.

[0020] Among them, the protection device is mainly used to adjust the output voltage, output current, output power and other parameters of the intelligent power supply based on the control signal of the controller, so that the relevant parameters of the intelligent power supply all operate within the expected parameter range to ensure the stable operation of the intelligent power supply. Optionally, the protection device may include at least one of the following: a power switch tube, a digital potentiometer, a voltage stabilizer, a current stabilizer, and the like. The power switch tube is used to cut off the output of the intelligent power supply, the digital potentiometer is used to adjust the output voltage or output current of the intelligent power supply, the voltage stabilizer is used to stabilize the output voltage of the intelligent power supply, and the current stabilizer is used to stabilize the output current of the intelligent power supply. Optionally, the protection device can be integrated into the controller of the intelligent power supply.

[0021] It should be noted that the controller can monitor the voltage, current, power and other parameters of the smart power supply in real time. When the voltage, current, power and other parameters of the smart power supply are in an abnormal range, the controller will control the protection device to perform the corresponding protection operation to ensure the safe operation of the smart power supply. However, if the protection operation is performed only after the corresponding parameters are detected to be abnormal, the power supply protection is not timely, which may easily damage the smart power supply and reduce the safety of the power supply.

[0022] Therefore, applied to the above scenario, in the power supply intelligent protection control method provided in the present application, the controller obtains a historical voltage data set collected by the voltage sensor and a historical current data set collected by the current sensor; the historical voltage data set includes i historical voltages, and the historical current data set includes j historical currents; i and j are both integers greater than or equal to 3; The controller performs curve fitting on i historical voltages to obtain a historical voltage curve; The controller performs curve fitting on j historical currents to obtain a historical current curve; The controller determines a first voltage curve of the intelligent power supply in a future time period according to the historical voltage curve; The controller determines a first current curve of the intelligent power supply in a future time period according to the historical current curve; The controller determines the load power curve of the load device in the future time period according to the preset power demand; The controller determines the overvoltage protection threshold curve and the undervoltage protection threshold curve of the intelligent power supply in the future time period according to the load power curve; The controller determines the overcurrent protection threshold curve of the intelligent power supply in the future time period according to the load power curve; The controller determines a target critical point according to the first voltage curve, the first current curve, the overvoltage protection threshold curve, the undervoltage protection threshold curve, and the overcurrent protection threshold curve; the target critical point is used to represent the point corresponding to the minimum time when an abnormality occurs in the first voltage curve and the first current curve; The controller controls the protection device to perform a power protection operation corresponding to a target critical point.

[0023] It can be seen that, applied to the above scenario, the controller can obtain the historical voltage curve by curve fitting the i historical voltages collected by the voltage sensor, and predict the first voltage curve of the smart power supply in the future time period based on the historical voltage curve. By curve fitting the j historical currents collected by the current sensor, the historical current curve can be obtained, and the first voltage curve of the smart power supply in the future time period can be predicted based on the historical current curve. In this way, the overvoltage protection threshold curve, undervoltage protection threshold curve and overcurrent protection threshold curve of the load device in the future time period are predicted based on the power demand of the load device in the future time period. Therefore, according to the first voltage curve, the first current curve, the overvoltage protection threshold curve, the undervoltage protection threshold curve and the overcurrent protection threshold curve, the target critical point is determined, and then the protection device is controlled to perform the power protection operation corresponding to the target critical point, so as to perform the protection operation for the abnormalities occurring in the future time period in advance, ensure the stable operation of the power supply, and improve the safety of the power supply operation.

[0024] See also Figure 2 , Figure 2A flowchart of a power supply intelligent protection control method provided in an embodiment of the present application. The method is applied to a controller of an intelligent power supply, the intelligent power supply is used to power a load device, and the intelligent power supply also includes: a voltage sensor, a current sensor and a protection device. The method includes but is not limited to the following steps: S201: Acquire a historical voltage data set collected by a voltage sensor and a historical current data set collected by a current sensor.

[0025] In the embodiment of the present application, the historical voltage data set includes i historical voltages, and the historical current data set includes j historical currents. i and j are both integers greater than or equal to 3.

[0026] It is understandable that both the voltage sensor and the current sensor are electronic devices that periodically perform data sampling. In order to ensure that the sampled voltage and current can reflect the current operating state of the intelligent power supply, the voltage sensor only retains the i historical voltages before the current moment and the sampling time corresponding to each historical voltage, and the current sensor only retains the j historical currents before the current moment and the sampling time corresponding to each historical current. The controller can obtain the i historical voltages and the sampling time corresponding to each historical voltage, and the j historical currents and the sampling time corresponding to each historical current to analyze the operating state of the intelligent power supply.

[0027] S202: Perform curve fitting on i historical voltages to obtain a historical voltage curve.

[0028] In the embodiment of the present application, the historical voltage curve is a two-dimensional curve, the horizontal axis represents time, and the vertical axis represents the historical voltage, which is mainly used to reflect the change of the historical voltage over time. The controller performs curve fitting on the i historical voltages according to the i historical voltages and the sampling time corresponding to each historical voltage to obtain the historical voltage curve. Optionally, the CurveFitter tool can be used for curve fitting.

[0029] S203: Perform curve fitting on j historical currents to obtain a historical current curve.

[0030] In the embodiment of the present application, the historical current curve is a two-dimensional curve, the horizontal axis represents time, and the vertical axis represents the historical current, which is mainly used to reflect the change of the historical current over time. The controller performs curve fitting on the j historical currents according to the j historical currents and the sampling time corresponding to each historical current to obtain the historical current curve. Optionally, the CurveFitter tool can be used for curve fitting.

[0031] S204: Determine a first voltage curve of the smart power supply in a future time period according to the historical voltage curve.

[0032] In the embodiment of the present application, the future time period can be preset according to actual needs. The controller can establish a target voltage curve prediction model based on the historical voltage curve of the smart power supply to predict the voltage of the smart power supply in the future time period through the target voltage curve prediction model to obtain a first voltage curve.

[0033] Exemplarily, determining the first voltage curve of the smart power supply in a future time period according to the historical voltage curve may include: Obtain c historical voltages corresponding to c moments from the historical voltage curve; each moment corresponds to a historical voltage; According to c historical voltages, an autocorrelation function and a partial autocorrelation function are determined; Determine the model order based on the autocorrelation function and partial autocorrelation function; Determining a first voltage curve prediction model according to the model order; According to the c historical voltages, parameters of the first voltage curve prediction model are estimated to obtain model parameters; Determining a second voltage curve prediction model according to the first voltage curve prediction model and model parameters; According to the historical voltage curve, the second voltage curve prediction model is verified to obtain the degree of fit; Determining a target voltage curve prediction model according to the second voltage curve prediction model and the degree of fitting; The data in the historical voltage curve is input into the target voltage curve prediction model to obtain a first voltage curve.

[0034] In an embodiment of the present application, the target voltage curve prediction model may be an autoregressive model (AR), which is a prediction model that predicts the data of the next time series based on the data of the historical time series. The controller of the intelligent power supply may construct a target voltage curve prediction model based on the historical voltage in the historical voltage curve to predict the voltage in the future time period, thereby obtaining the first voltage curve.

[0035] Specifically, the controller obtains c historical voltages corresponding to c moments from the historical voltage curve, wherein the time intervals between any two adjacent moments in the c moments are equal. It can be understood that the more historical voltages are obtained, the higher the prediction accuracy of the constructed target voltage curve prediction model.

[0036] Furthermore, based on the c historical voltages, an autocorrelation function (ACF) is determined. The autocorrelation function is used to measure the linear correlation between the historical voltages at different moments in the c moments. The autocorrelation function can be represented by the ratio of the autocovariance of the k-order lag of the c historical voltages to the variance of the c historical voltages, where k is an integer less than or equal to c. The autocovariance of the k-order lag = E[(U t -μ)(U t+k -μ)], where E[] represents the mathematical expectation, U t represents the historical voltage at time t, U t+k Represents the historical voltage at time t+k, and μ represents the mean of c historical voltages. Based on this, the autocorrelation function can be determined. Then, based on the c historical voltages, the partial autocorrelation function (PACF) is determined. The partial autocorrelation function is used to measure the correlation between any two historical voltages after removing the influence of the historical voltage at the intermediate moment. Among them, the partial autocorrelation function can be obtained by solving the Yule-Walker equation. After determining the autocorrelation function and the partial autocorrelation function, the order of the autoregressive model can be determined by the function graphs of the autocorrelation function and the partial autocorrelation function. For example, the partial autocorrelation function of the p-order autoregressive model is truncated after the p-order, and the autocorrelation function is tailed at the p-order, where p is a positive integer.

[0037] Furthermore, the controller determines the first voltage curve prediction model according to the model order. The first voltage curve prediction model can be expressed by the following formula (1): Formula (1) in, represents the historical voltage at time t, represents the historical voltage at time t-1, represents the historical voltage at time t-2, represents the historical voltage at time tp, , , represents the model parameters, represents the deviation noise.

[0038] Further, the controller will perform parameter estimation on the first voltage curve prediction model based on the c historical voltages, wherein the parameter estimation can adopt any of the following methods, for example: moment estimation method, least squares estimation method, maximum likelihood estimation method. This application does not specifically limit this. Model parameters can be determined by parameter estimation. Then, the model parameters are brought into the first voltage curve prediction model to obtain the second voltage curve prediction model. Next, the controller obtains any c historical voltages from the historical voltage curve at preset time intervals, and verifies the second voltage curve prediction model to determine the degree of fit of the second voltage curve prediction model, and the degree of fit can be represented by mean square error, root mean square error, mean absolute error, etc. When the degree of fit is greater than or equal to the preset degree of fit, the second voltage curve prediction model is determined to be the target voltage curve prediction model, otherwise, the parameter estimation is performed again to obtain a new second voltage curve prediction model until the degree of fit of the new second voltage curve prediction model is greater than or equal to the preset degree of fit.

[0039] Finally, the controller can obtain c new historical voltages from the historical voltage curve at preset time intervals, and input the c new historical voltages into the target voltage curve prediction model to obtain the voltage at the next moment, and continue to predict according to the voltage at the next moment and c-1 historical voltages among the c new historical voltages, until d voltages in the future time period are obtained. The d voltages are curve-fitted to obtain the first voltage curve. Optionally, the CurveFitter tool can be used for curve fitting.

[0040] Therefore, through the historical voltage curve, the model order can be solved through the autocorrelation function and the partial autocorrelation function, and the model parameters can be solved through parameter estimation, so as to construct a target voltage curve prediction model to predict the first voltage curve of the smart power supply in the future time period, so as to understand the voltage change of the smart power supply in the future time period, and then timely perform protection operations on possible abnormalities to improve the safety of the smart power supply.

[0041] Exemplarily, the historical voltage curve and the first voltage curve may be as follows: Figure 3 As shown. Figure 3 In the coordinate system, t0, t1, and t2 on the horizontal axis represent time, and the vertical axis U represents voltage. The curve from t1 to t0 is the historical voltage curve, and the curve from t0 to t2 is the first voltage curve.

[0042] S205: Determine a first current curve of the smart power supply in a future time period according to the historical current curve.

[0043] In the embodiment of the present application, the processing method for determining the first current curve of the smart power supply in the future time period according to the historical current curve is similar to the processing method for determining the first voltage curve of the smart power supply in the future time period according to the historical voltage curve, and will not be repeated here.

[0044] Exemplarily, the historical current curve and the first current curve may be as follows: Figure 4 As shown. Figure 4 In the coordinate system, t0, t2, and t3 on the horizontal axis represent time, and the vertical axis I represents current. The curve from t3 to t0 is the historical current curve, and the curve from t0 to t2 is the first current curve.

[0045] S206: Determine a load power curve of the load device in a future time period according to the preset power demand.

[0046] In the embodiment of the present application, the preset power demand can be set in advance by the user. For example, if a mobile phone needs to be charged from 50% to 80%, the preset power demand is the product of the battery capacity of the mobile phone and 30%. The controller determines the load power curve of the load device in the future time period according to the preset power demand, wherein the load power curve is composed of straight lines in multiple time periods, such as Figure 5 In the coordinate system shown, t0, t4, t5, and t6 represent time, P1, P2, and P3 represent power, the load power in the time period from t0 to t4 is P1, the load power in the time period from t4 to t5 is P2, and the load power in the time period from t5 to t6 is P3. It can be understood that the load power in each time period is related to the number of load devices connected in the time period.

[0047] S207: Determine an overvoltage protection threshold curve and an undervoltage protection threshold curve of the intelligent power supply in a future time period according to the load power curve.

[0048] In the embodiment of the present application, the overvoltage protection threshold curve is used to represent the change of the overvoltage protection threshold of the intelligent power supply in the future time period, and the undervoltage protection threshold curve is used to represent the change of the undervoltage protection threshold of the intelligent power supply in the future time period. The overvoltage protection threshold is a voltage critical value set to prevent the intelligent power supply from being damaged by excessive voltage, and the undervoltage protection threshold is a voltage critical value set to prevent the load device from being unable to operate due to excessive low voltage.

[0049] It is understandable that most existing power supplies are set with fixed overvoltage protection thresholds and undervoltage protection thresholds, however, the fixed overvoltage protection thresholds and undervoltage protection thresholds cannot reflect the impact of load power on the intelligent power supply. Therefore, in the embodiment of the present application, each load power of the load power curve corresponds to an overvoltage protection threshold and an undervoltage protection threshold, and the mapping relationship between the load power and the overvoltage protection threshold and the undervoltage protection threshold can be pre-set according to the actual test results. In this way, based on the load power curve, the overvoltage protection threshold curve and the undervoltage protection threshold curve can be determined. The shapes of the overvoltage protection threshold curve and the undervoltage protection threshold curve are similar to the load power curve and are no longer shown here.

[0050] S208: Determine an overcurrent protection threshold curve of the smart power supply in a future time period according to the load power curve.

[0051] In the embodiment of the present application, the overcurrent protection threshold curve is used to represent the change of the overcurrent protection threshold of the intelligent power supply in the future time period. The processing method of determining the overcurrent protection threshold curve of the intelligent power supply in the future time period according to the load power curve is similar to the processing method of determining the overvoltage protection threshold curve of the intelligent power supply in the future time period according to the load power curve, and will not be repeated here.

[0052] S209: Determine a target critical point according to the first voltage curve, the first current curve, the overvoltage protection threshold curve, the undervoltage protection threshold curve, and the overcurrent protection threshold curve.

[0053] In the embodiment of the present application, the target critical point is used to represent the point corresponding to the minimum time when an abnormality occurs in the first voltage curve and the first current curve. The controller can determine the point where the intelligent power supply will have an overvoltage abnormality, an undervoltage abnormality, an overcurrent abnormality, a voltage mutation abnormality, and a current mutation abnormality in the future time period based on the first voltage curve, the first current curve, the overvoltage protection threshold curve, the undervoltage protection threshold curve, and the overcurrent protection threshold curve, and use the point corresponding to the minimum time when the abnormality occurs as the target critical point.

[0054] Exemplarily, determining the target critical point according to the first voltage curve, the first current curve, the overvoltage protection threshold curve, the undervoltage protection threshold curve, and the overcurrent protection threshold curve may include: Determining a first critical point according to the first voltage curve, the overvoltage protection threshold curve, and the undervoltage protection threshold curve; Determining a second critical point according to the first current curve and the overcurrent protection threshold curve; Determine the critical point with the smallest corresponding time between the first critical point and the second critical point as the third critical point; Obtaining a voltage curve before a time corresponding to a third critical point in the first voltage curve to obtain a second voltage curve; Determine the ratio of the voltage at each moment in the second voltage curve to the current at each moment in the second current curve to obtain a first ratio curve; Determining a fourth critical point according to the first ratio curve; The point at which the corresponding time between the third critical point and the fourth critical point is the smallest is determined as the target critical point.

[0055] In an embodiment of the present application, the first critical point is used to represent the point at which the corresponding time in the overvoltage critical point and the undervoltage critical point in the first voltage curve is the smallest. The overvoltage critical point is used to represent the point at which the voltage in the first voltage curve is greater than or equal to the minimum time of the overvoltage protection threshold corresponding to the voltage. The undervoltage critical point is used to represent the point at which the voltage in the first voltage curve is less than or equal to the minimum time of the undervoltage protection threshold corresponding to the voltage. The second critical point is used to represent the point at which the current in the first current curve is greater than or equal to the minimum time of the overcurrent protection threshold corresponding to the current. The fourth critical point is used to represent the point in the ratio curve corresponding to the minimum time when the ratio does not fall within the preset ratio range.

[0056] Specifically, the controller first determines the overvoltage critical point at the minimum time when the voltage is greater than or equal to the overvoltage protection threshold value corresponding to the voltage according to the first voltage curve and the overvoltage protection threshold curve. Then, the undervoltage critical point at the minimum time when the voltage is less than or equal to the undervoltage protection threshold value corresponding to the voltage is determined according to the first voltage curve and the undervoltage protection threshold curve. Thus, the first critical point is determined according to the overvoltage critical point and the undervoltage critical point.

[0057] Exemplarily, determining the first critical point according to the first voltage curve, the overvoltage protection threshold curve, and the undervoltage protection threshold curve may include: Divide the overvoltage protection threshold curve into m overvoltage protection threshold line segments; The segment whose starting time is the same as the starting time of the future time period among the m overvoltage protection threshold line segments is taken as the first overvoltage protection threshold line segment; Determine a first overvoltage protection threshold corresponding to a first overvoltage protection threshold line segment, determine a first starting time corresponding to the first overvoltage protection threshold line segment, and obtain a first voltage corresponding to the first starting time in the first voltage curve; If the first voltage is greater than a first overvoltage protection threshold, determining a point in the first voltage curve corresponding to the first starting time as an overvoltage critical point; If the first voltage is less than or equal to the first overvoltage protection threshold, determining n intersection points of the first voltage curve and the first overvoltage protection threshold line segment; Determine n slopes corresponding to n intersection points in the first voltage curve; each intersection point corresponds to a slope; If there is a slope greater than zero among the n slopes, then the intersection point whose slope is greater than zero and whose corresponding time is the smallest among the n intersection points is determined as the overvoltage critical point; If there is no slope greater than zero among the n slopes, a second overvoltage protection threshold line segment is determined from the m overvoltage protection threshold line segments; a second starting time corresponding to the second overvoltage protection threshold line segment is the same as an end time corresponding to the first overvoltage protection threshold line segment; Using the second overvoltage protection threshold line segment as the first overvoltage protection threshold line segment until the overvoltage critical point is determined; Determining an undervoltage critical point according to the first voltage curve and the undervoltage protection threshold curve; The earliest corresponding point between the overvoltage critical point and the undervoltage critical point is determined as the first critical point.

[0058] In the embodiment of the present application, m is a positive integer and n is a natural number.

[0059] Specifically, the controller first divides the curve into m overvoltage protection threshold line segments according to the overvoltage protection threshold in the overvoltage protection threshold curve, and each overvoltage protection threshold line segment corresponds to an overvoltage protection threshold. Figure 6 The three separated line segments Ua1, Ua2, and Ua3 in the diagram are the overvoltage protection threshold line segments. Figure 6 The curve in is the first voltage curve. The controller will take the segment whose starting time is the same as the starting time of the future time period among the m overvoltage protection threshold segments as the first overvoltage protection threshold segment, that is, Figure 6 The line segment from t0 to t7 is used as the first overvoltage protection threshold line segment.

[0060] Then, the controller determines the first overvoltage protection threshold Ua1 corresponding to the first overvoltage protection threshold line segment, determines the first starting time t0 corresponding to the first overvoltage protection threshold line segment, and obtains the first voltage U1 corresponding to the first starting time in the first voltage curve.

[0061] If the first voltage is greater than the first overvoltage protection threshold, it means that an overvoltage abnormality occurs at the first starting moment, and the controller determines that the point in the first voltage curve corresponding to the first starting moment t0 is the overvoltage critical point.

[0062] If the first voltage is less than or equal to the first overvoltage protection threshold, the controller determines n intersections of the first voltage curve and the first overvoltage protection threshold line segment. If the first voltage curve has no intersections with the first overvoltage protection threshold line segment, such as Figure 6 As shown, the first voltage curve has no intersection with Ua1 from t0 to t7, then the end time of the first overvoltage protection threshold line segment is taken as the new first starting time, and the overvoltage protection threshold line segment corresponding to the new first starting time is taken as the first overvoltage protection threshold line segment to determine the intersection of the first voltage curve and the first overvoltage protection threshold line segment. Figure 6As shown, the first voltage curve and Ua2 have an intersection at time Ti. After determining n intersections, the controller determines the slope of the first voltage curve at each intersection, and obtains n slopes.

[0063] If there is a slope greater than zero among the n slopes, the next moment of the intersection of the slope greater than zero will definitely exceed the overvoltage protection threshold, such as Figure 6 As shown, at the intersection point at time Ti, the slope of the curve is greater than zero, and after Ti, the voltage of the first voltage curve will exceed the overvoltage protection threshold. Therefore, the controller determines the point with the smallest time among the n intersection points with a slope greater than zero as the overvoltage critical point.

[0064] If there is no slope greater than zero among the n slopes, it means that the n intersection points are all tangent points between the first voltage curve and the first overvoltage protection threshold line segment, and all voltages in the time period corresponding to the first overvoltage protection threshold line segment are less than or equal to the overvoltage protection threshold corresponding to the first overvoltage protection threshold line segment. At this time, the controller will use the second overvoltage protection threshold line segment as the first overvoltage protection threshold line segment, and continue to determine the overvoltage critical point until the overvoltage critical point is determined.

[0065] Furthermore, the controller determines the undervoltage critical point where the undervoltage abnormality occurs earliest based on the first voltage curve and the undervoltage protection threshold curve. The processing method for determining the undervoltage critical point is similar to the processing method for determining the overvoltage critical point, which will not be repeated here.

[0066] The controller will obtain the first moment corresponding to the overvoltage critical point and the second moment corresponding to the undervoltage critical point. If the first moment is earlier than the second moment, the overvoltage critical point will be used as the first critical point; otherwise, the undervoltage critical point will be used as the first critical point.

[0067] It can be seen that by dividing the overvoltage protection threshold curve into m overvoltage protection threshold line segments, and analyzing the positional relationship between the first voltage curve and each overvoltage protection threshold line segment in turn, the overvoltage critical point can be determined. Similarly, according to the positional relationship between the first voltage curve and the undervoltage protection threshold curve, the undervoltage critical point can be determined, so that the earliest corresponding point between the overvoltage critical point and the undervoltage critical point is taken as the first critical point. In this way, the earliest critical point where an overvoltage anomaly or an undervoltage anomaly occurs can be determined, and the protection operation can be performed in time to improve the safety of the intelligent power supply.

[0068] Then, the controller determines the second critical point according to the first current curve and the overcurrent protection threshold curve. The processing method for determining the second critical point according to the first current curve and the overcurrent protection threshold curve is similar to the processing method for determining the overvoltage critical point according to the first voltage curve and the overvoltage protection threshold curve, and will not be repeated here.

[0069] Based on this, the controller will use the critical point with the smallest corresponding moment between the first critical point and the second critical point as the third critical point. The voltage curve before the moment corresponding to the third critical point is obtained from the first voltage curve to obtain the second voltage curve, and the current curve before the moment corresponding to the third critical point is obtained from the first current curve to obtain the second current curve.

[0070] It should be noted that if a voltage mutation or current mutation occurs in the power supply within a short period of time, the mutation voltage or current is likely to burn out the internal components of the intelligent power supply. Therefore, after determining the third critical point, the controller also needs to determine whether there is an abnormal voltage mutation or current mutation before the third critical point.

[0071] The controller determines the ratio of the voltage at each moment in the second voltage curve to the current at each moment in the second current curve to obtain a first ratio curve. Then, it is determined whether each ratio in the first ratio curve falls within a preset ratio range, and the point corresponding to the minimum moment when the ratio does not fall within the preset ratio range is used as the fourth critical point. The point with the minimum corresponding moment between the third critical point and the fourth critical point is used as the target critical point.

[0072] It can be seen that the first critical point can be determined by the first voltage curve, the overvoltage protection threshold curve and the undervoltage protection threshold curve, and the second critical point can be determined according to the first current curve and the overcurrent protection threshold curve, and the point with the smallest corresponding moment in the first critical point and the second critical point is taken as the third critical point. Then, by determining the second voltage curve and the second current curve before the third critical point, the first ratio curve can be determined, and the fourth critical point can be determined according to the first ratio curve, so that the point with the smallest corresponding moment in the third critical point and the fourth critical point is taken as the target critical point. In this way, the earliest critical point where an abnormality occurs in the future time period can be determined, and the corresponding protection operation can be performed in time to improve the safety of the intelligent power supply.

[0073] S210: Controlling the protection device to perform a power supply protection operation corresponding to the target critical point.

[0074] In an embodiment of the present application, the controller can control the protection device to perform operations such as cutting off power output, boosting, reducing, stabilizing, and stabilizing current to protect the smart power supply. The power protection operation performed corresponds to the abnormal type of the target critical point.

[0075] Exemplarily, when the target critical point is an overvoltage critical point, controlling the protection device to perform a power protection operation corresponding to the target critical point may include: Get the rated voltage of the smart power supply; Determine the withstand voltage value of the intelligent power supply according to the rated voltage; Determine the overvoltage duration period according to the first voltage curve and the overvoltage critical point, and use the voltage curve corresponding to the overvoltage duration period as the third voltage curve; If there is a voltage greater than the withstand voltage value in the third voltage curve, the control protection device cuts off the output of the intelligent power supply at the time corresponding to the overvoltage critical point; If the voltages in the third voltage curve are all less than or equal to the withstand voltage value, then the voltage reduction control amount is determined according to the third voltage curve and the overvoltage protection threshold corresponding to the overvoltage critical point; Determine the voltage reduction control time according to the voltage reduction control amount; The control protection device reduces the voltage of the intelligent power supply at the voltage reduction control time so that the voltage corresponding to the overvoltage critical point is less than or equal to the overvoltage protection threshold corresponding to the overvoltage critical point.

[0076] It should be noted that the smart power supply itself is factory-set with a rated voltage and a withstand voltage value, wherein the withstand voltage value is higher than any overvoltage protection threshold in the overvoltage protection threshold curve. If the voltage exceeds the withstand voltage value of the smart power supply, the internal components of the smart power supply will be damaged.

[0077] Specifically, the controller first obtains the rated voltage of the smart power supply, and the withstand voltage value of the smart power supply can be determined according to the rated voltage. The mapping relationship between the rated voltage and the withstand voltage value is determined at the factory. Optionally, the withstand voltage value can be 1.5 times or 2 times the rated voltage. The controller determines the overvoltage duration period according to the first voltage curve and the overvoltage critical point, that is, determines the duration period from the overvoltage critical point to the time when the voltage drops again to the overvoltage protection threshold. The voltage curve corresponding to the overvoltage duration period is used as the third voltage curve. Figure 6 The period from Ti to t8 shown is the overvoltage duration period, and the voltage curve from Ti to t8 is the third voltage curve.

[0078] If there is a voltage greater than the withstand voltage value in the third voltage curve, it means that the voltage increase of the smart power supply during the overvoltage duration period is large, and the smart power supply is at risk of being damaged. The controller will control the protection device to cut off the output of the smart power supply at the moment corresponding to the overvoltage critical point, so that the smart power supply is powered off and reset, thereby protecting the safety of the smart power supply.

[0079] If the voltages in the third voltage curve are all less than or equal to the withstand voltage value, it means that the voltage increase of the intelligent power supply during the overvoltage duration period is controllable, and the controller will determine the difference between the maximum voltage in the third voltage curve and the overvoltage protection threshold corresponding to the overvoltage critical point, and determine the voltage reduction control amount based on the difference. Determine the voltage reduction duration based on the voltage reduction control amount, and determine the voltage reduction control moment based on the voltage reduction duration and the overvoltage critical point. Then, the controller controls the protection device to reduce the voltage of the intelligent power supply at the voltage reduction control moment, so that the voltage corresponding to the overvoltage critical point is less than or equal to the overvoltage protection threshold corresponding to the overvoltage critical point.

[0080] It can be seen that by determining whether there is a voltage greater than the withstand voltage value in the third voltage curve, the protection device can be controlled to cut off the output of the smart power supply or reduce the voltage of the smart power supply, thereby protecting the smart power supply and improving the safety of the smart power supply.

[0081] Exemplarily, when the target critical point is an undervoltage critical point, controlling the protection device to perform a power protection operation corresponding to the target critical point may include: Determine the undervoltage duration period according to the first voltage curve and the undervoltage critical point, and use the voltage curve corresponding to the undervoltage duration period as the fourth voltage curve; determining a lowest voltage in the fourth voltage curve; Acquire a first load power corresponding to the undervoltage critical point from a load power curve; Determining a minimum input voltage of the load device according to the first load power; According to the minimum input voltage, the minimum undervoltage protection threshold of the intelligent power supply is determined; If the minimum voltage is greater than or equal to the minimum undervoltage protection threshold, the boost control amount is determined according to the undervoltage protection threshold corresponding to the undervoltage critical point and the minimum voltage, and the protection device is controlled to boost the intelligent power supply according to the boost control amount, so that the voltage at the moment corresponding to the undervoltage critical point is greater than or equal to the undervoltage protection threshold at that moment; If the lowest voltage is less than the minimum undervoltage protection threshold, a non-critical device in the load device is determined; The control protection device cuts off the power supply of the intelligent power supply to non-critical equipment at the moment corresponding to the undervoltage critical point.

[0082] In the embodiment of the present application, the voltage input to the load device during operation needs to reach the minimum input voltage so that the load device can work normally. Otherwise, if there is voltage in the circuit but the load device does not work, the current in the circuit will flow back and damage the smart power supply. Therefore, it is necessary to ensure that the voltage output by the smart power supply is greater than or equal to the minimum input voltage of the load device.

[0083] Specifically, the controller first determines the undervoltage duration period according to the first voltage curve and the undervoltage critical point, that is, determines the time period from the undervoltage critical point to the moment when the voltage is equal to the undervoltage protection threshold again. The voltage curve corresponding to the undervoltage duration period is used as the fourth voltage curve. The controller determines the lowest voltage in the fourth voltage curve.

[0084] Then, the controller obtains the first load power corresponding to the undervoltage critical point from the load power curve. According to the first load power, the minimum input voltage of the load device is determined, and according to the minimum input voltage, the minimum undervoltage protection threshold of the intelligent power supply can be determined. Among them, the mapping relationship between the minimum input voltage and the minimum undervoltage protection threshold can be preset according to the actual test results.

[0085] If the lowest voltage of the fourth voltage curve is greater than or equal to the minimum undervoltage protection threshold, it means that the undervoltage anomaly is controllable, and the controller can determine the boost control amount according to the undervoltage protection threshold corresponding to the undervoltage critical point and the lowest voltage, determine the boost duration according to the boost control amount, and determine the boost control moment according to the boost duration. Then, the control protection device boosts the intelligent power supply at the boost control moment so that the voltage at the moment corresponding to the undervoltage critical point is greater than or equal to the undervoltage protection threshold at that moment.

[0086] If the lowest voltage of the fourth voltage curve is less than the minimum undervoltage protection threshold, it means that during the undervoltage duration period, the voltage drop is large and the intelligent power supply is difficult to supply power to all load devices. Therefore, the controller will determine that the device with the lowest criticality level among the load devices is a non-critical device, and the criticality level of the load device is pre-set by the user. The controller will control the protection device to cut off the power supply of the intelligent power supply to the non-critical device at the time corresponding to the undervoltage critical point.

[0087] Therefore, by determining whether the lowest voltage in the fourth voltage curve is less than the minimum undervoltage protection threshold, it can be determined whether the undervoltage anomaly is controllable, thereby controlling the protection device to boost the voltage of the smart power supply, or cutting off the power supply to non-critical equipment, and then timely performing power protection operations on the undervoltage anomaly in the future time period, thereby improving the safety of the smart power supply.

[0088] Exemplarily, when the target critical point is the second critical point, controlling the protection device to perform a power protection operation corresponding to the target critical point may include: Determine the overcurrent duration period according to the first current curve and the second critical point, and use the current curve corresponding to the overcurrent duration period as the second current curve; Determining a current reduction control amount according to the second current curve; Determine the duty cycle of the smart power supply during the overcurrent duration period; Determining a target duty cycle according to the second current curve and the duty cycle; Determine the duration of the flow reduction control according to the flow reduction control amount and the target duty cycle; Determine the time of downflow regulation according to the duration of downflow regulation; The control protection device adjusts the duty cycle of the intelligent power supply to the target duty cycle at the current reduction control moment, so that the current at the moment corresponding to the second critical point is reduced to less than or equal to the overcurrent protection threshold at that moment.

[0089] In the embodiment of the present application, the duty cycle represents the ratio of the duration of the high level to the duration of the cycle in a signal cycle. The current of the intelligent power supply can be adjusted by adjusting the duty cycle.

[0090] Specifically, the controller first determines the overcurrent duration period according to the first current curve and the second critical point, and uses the current curve corresponding to the overcurrent duration period as the second current curve. Then, the maximum current in the second current curve is determined, the difference between the maximum current and the overcurrent protection threshold corresponding to the second critical point is determined, and the current reduction control amount is determined according to the difference.

[0091] Then, the controller determines the duty cycle of the intelligent power supply during the overcurrent duration period, determines the duty cycle control amount according to the difference between the maximum current of the second current curve and the overcurrent protection threshold corresponding to the second critical point, and takes the sum of the duty cycle control amount and the duty cycle as the target duty cycle.

[0092] Furthermore, the controller determines the duration of the current reduction control according to the current reduction control amount and the target duty cycle, wherein the mapping relationship among the current reduction control amount, the target duty cycle, and the current reduction control duration can be preset according to the actual test results. According to the current reduction control duration and the second critical point, the current reduction control moment can be determined. Finally, the controller controls the protection device to adjust the duty cycle of the intelligent power supply to the target duty cycle at the time of current reduction control, thereby reducing the current of the intelligent power supply, so that the current at the moment corresponding to the second critical point is reduced to less than or equal to the overcurrent protection threshold at that moment.

[0093] Therefore, when an overcurrent abnormality is about to occur at the target critical point, the controller can determine the target duty cycle and the current reduction control duration, and control the protection device to adjust the duty cycle of the smart power supply to the target duty cycle at the current reduction control moment, thereby protecting the smart power supply and improving the safety of the smart power supply.

[0094] Exemplarily, when the target critical point is the fourth critical point, controlling the protection device to perform a power protection operation corresponding to the target critical point may include: Determining the abnormal duration period according to the first ratio curve and the fourth critical point; Acquire a fifth voltage curve corresponding to the abnormal duration period from the first voltage curve; acquire a third current curve corresponding to the abnormal duration period from the first current curve; acquire a target load power curve corresponding to the abnormal duration period from the load power curve; Determine a reference voltage curve and a reference current curve according to a target load power curve; determining an abnormality type according to the fifth voltage curve, the third current curve, the reference voltage curve, and the reference current curve; If the abnormality type is a voltage mutation abnormality, the voltage stabilization ratio is determined according to the fifth voltage curve and the reference voltage curve; According to the voltage regulation ratio, the control protection device stabilizes the voltage of the intelligent power supply at the time corresponding to the fourth critical point; If the abnormality type is a sudden change in current, the steady current ratio is determined according to the third current curve and the reference current curve; According to the current stabilization ratio, the control protection device stabilizes the current of the intelligent power supply at the time corresponding to the fourth critical point.

[0095] In the embodiment of the present application, the controller needs to determine the type of abnormality occurring at the target critical point, and thereby control the protection device to perform voltage stabilization or current stabilization operation according to the type of abnormality.

[0096] Specifically, the controller first determines the abnormal duration period according to the first ratio curve and the fourth critical point, that is, the time period starting from the fourth critical point during which the ratio does not fall into the preset ratio range. The fifth voltage curve corresponding to the abnormal duration period is obtained from the first voltage curve, the third current curve corresponding to the abnormal duration period is obtained from the first current curve, and the target load power curve corresponding to the abnormal duration period is obtained from the load power curve.

[0097] Then, according to the target load power at each moment on the target load power curve, the reference voltage and the reference current corresponding to each moment are determined, and the reference voltage curve is determined according to the reference voltage corresponding to each moment, and the reference current curve is determined according to the reference current corresponding to each moment.

[0098] Further, the controller determines whether the abnormality type is a voltage mutation abnormality based on the fifth voltage curve and the reference voltage curve. Specifically, the controller determines the difference between the voltage at each moment in the fifth voltage curve and the reference voltage at the corresponding moment in the reference voltage curve to obtain a voltage difference curve. If there is a voltage difference in the voltage difference curve that does not fall into the preset voltage difference range, the abnormality type is determined to be a voltage mutation abnormality. If all voltage differences in the voltage difference curve fall into the preset voltage difference range, it is determined that the abnormality type is not a voltage mutation abnormality. The controller determines the difference between the current at each moment in the third current curve and the reference current at the corresponding moment in the reference current curve to obtain a current difference curve. If there is a current difference in the current difference curve that does not fall into the preset voltage difference range, the abnormality type is determined to be a current mutation abnormality.

[0099] If the abnormality type is a voltage mutation abnormality, the controller determines the voltage regulation ratio according to the fifth voltage curve and the reference voltage curve, and controls the protection device to stabilize the intelligent power supply at the moment corresponding to the fourth critical point according to the voltage regulation ratio, so as to stabilize the voltage at the moment corresponding to the fourth critical point to the reference voltage corresponding to the moment.

[0100] If the abnormality type is a sudden change in current, the steady current ratio is determined according to the third current curve and the reference current curve. According to the steady current ratio, the protection device is controlled to stabilize the current of the intelligent power supply at the moment corresponding to the fourth critical point, so as to stabilize the current at the moment corresponding to the fourth critical point to the reference current corresponding to the moment.

[0101] Therefore, by determining the abnormality type corresponding to the target critical point, when the abnormality type is a voltage mutation abnormality, the control protection device can perform a voltage stabilization operation on the smart power supply; when the abnormality type is a current mutation abnormality, the control protection device can perform a current stabilization operation on the smart power supply, thereby making the voltage or current of the smart power supply continuously stable and improving the safety of the smart power supply.

[0102] In summary, in the embodiment of the present application, the controller of the intelligent power supply first obtains the historical voltage data set collected by the voltage sensor and the historical current data set collected by the current sensor. Then, the i historical voltages in the historical voltage data set are curve-fitted to obtain the historical voltage curve, and the j historical currents in the historical current data set are curve-fitted to obtain the historical current curve, and the first voltage curve of the intelligent power supply in the future time period is determined according to the historical voltage curve, and the first current curve of the intelligent power supply in the future time period is determined according to the historical current curve. Then, according to the preset power demand, the load power curve of the load device in the future time period is determined, and according to the load power curve, the overvoltage protection threshold curve and the undervoltage protection threshold curve of the intelligent power supply in the future time period are determined, and according to the load power curve, the overcurrent protection threshold curve of the intelligent power supply in the future time period is determined. Further, according to the first voltage curve, the first current curve, the overvoltage protection threshold curve, the undervoltage protection threshold curve, and the overcurrent protection threshold curve, the target critical point is determined. Finally, the control protection device performs the power protection operation corresponding to the target critical point. Therefore, by predicting the voltage curve, current curve, overvoltage protection threshold curve and undervoltage protection threshold curve of the smart power supply in the future time period, the target critical point where the smart power supply will first show abnormality in the future time period can be predicted, so as to control the protection device in advance to perform the power protection operation corresponding to the target critical point, protect the smart power supply in time, and improve the safety of the power supply.

[0103] See also Figure 7 , Figure 7 A functional unit composition block diagram of a power supply intelligent protection control device provided in an embodiment of the present application. The power supply intelligent protection control device 700 may include a controller of any of the above embodiments. The power supply intelligent protection control device 700 is located in an intelligent power supply, which is used to power a load device. The intelligent power supply also includes: a voltage sensor, a current sensor, and a protection device. The power supply intelligent protection control device 700 includes an acquisition unit 701, a processing unit 702, and a control unit 703.

[0104] An acquisition unit 701 is used to acquire a historical voltage data set collected by a voltage sensor and a historical current data set collected by a current sensor; the historical voltage data set includes i historical voltages, and the historical current data set includes j historical currents; i and j are both integers greater than or equal to 3; The processing unit 702 is used to perform curve fitting on i historical voltages to obtain a historical voltage curve; Perform curve fitting on j historical currents to obtain a historical current curve; Determine, according to the historical voltage curve, a first voltage curve of the intelligent power supply in a future time period; Determine, according to the historical current curve, a first current curve of the intelligent power supply in a future time period; Determine the load power curve of the load equipment in the future time period according to the preset power demand; According to the load power curve, determine the overvoltage protection threshold curve and the undervoltage protection threshold curve of the intelligent power supply in the future time period; According to the load power curve, determine the overcurrent protection threshold curve of the intelligent power supply in the future time period; Determine a target critical point according to the first voltage curve, the first current curve, the overvoltage protection threshold curve, the undervoltage protection threshold curve, and the overcurrent protection threshold curve; the target critical point is used to represent the point corresponding to the minimum time when an abnormality occurs in the first voltage curve and the first current curve; The control unit 703 is used to control the protection device to perform a power protection operation corresponding to a target critical point.

[0105] In a possible embodiment, in determining the target critical point according to the first voltage curve, the first current curve, the overvoltage protection threshold curve, the undervoltage protection threshold curve, and the overcurrent protection threshold curve, the processing unit 702 is specifically used to: Determine a first critical point according to the first voltage curve, the overvoltage protection threshold curve and the undervoltage protection threshold curve; the first critical point is used to represent the point at which the corresponding time is the smallest among the overvoltage critical point and the undervoltage critical point in the first voltage curve; the overvoltage critical point is used to represent the point at which the voltage in the first voltage curve is greater than or equal to the minimum time of the overvoltage protection threshold corresponding to the voltage; the undervoltage critical point is used to represent the point at which the voltage in the first voltage curve is less than or equal to the minimum time of the undervoltage protection threshold corresponding to the voltage; Determine a second critical point according to the first current curve and the overcurrent protection threshold curve; the second critical point is used to represent the point in the first current curve at which the current is greater than or equal to the minimum time of the overcurrent protection threshold corresponding to the current; Determine the critical point with the smallest corresponding time between the first critical point and the second critical point as the third critical point; Obtaining a voltage curve before the moment corresponding to the third critical point in the first voltage curve to obtain a second voltage curve; obtaining a current curve before the moment corresponding to the third critical point in the first current curve to obtain a second current curve; Determine the ratio of the voltage at each moment in the second voltage curve to the current at each moment in the second current curve to obtain a first ratio curve; Determine a fourth critical point according to the first ratio curve; the fourth critical point is used to represent a point corresponding to the minimum time when the ratio in the ratio curve does not fall within the preset ratio range; The point at which the corresponding time between the third critical point and the fourth critical point is the smallest is determined as the target critical point.

[0106] In a possible embodiment, in determining the first critical point according to the first voltage curve, the overvoltage protection threshold curve, and the undervoltage protection threshold curve, the processing unit 702 is specifically configured to: The overvoltage protection threshold curve is divided into m overvoltage protection threshold line segments; m is a positive integer; The segment whose starting time is the same as the starting time of the future time period among the m overvoltage protection threshold line segments is taken as the first overvoltage protection threshold line segment; Determine a first overvoltage protection threshold corresponding to a first overvoltage protection threshold line segment, determine a first starting time corresponding to the first overvoltage protection threshold line segment, and obtain a first voltage corresponding to the first starting time in the first voltage curve; If the first voltage is greater than a first overvoltage protection threshold, determining a point in the first voltage curve corresponding to the first starting time as an overvoltage critical point; If the first voltage is less than or equal to the first overvoltage protection threshold, n intersection points of the first voltage curve and the first overvoltage protection threshold line segment are determined; n is a natural number; Determine n slopes corresponding to n intersection points in the first voltage curve; each intersection point corresponds to a slope; If there is a slope greater than zero among the n slopes, then the intersection point whose slope is greater than zero and whose corresponding time is the smallest among the n intersection points is determined as the overvoltage critical point; If there is no slope greater than zero among the n slopes, a second overvoltage protection threshold line segment is determined from the m overvoltage protection threshold line segments; a second starting time corresponding to the second overvoltage protection threshold line segment is the same as an end time corresponding to the first overvoltage protection threshold line segment; Using the second overvoltage protection threshold line segment as the first overvoltage protection threshold line segment until the overvoltage critical point is determined; Determining an undervoltage critical point according to the first voltage curve and the undervoltage protection threshold curve; The earliest corresponding point between the overvoltage critical point and the undervoltage critical point is determined as the first critical point.

[0107] In a possible embodiment, when the target critical point is an overvoltage critical point, in controlling the protection device to perform a power protection operation corresponding to the target critical point, the control unit 703 is specifically configured to: Get the rated voltage of the smart power supply; Determine the withstand voltage value of the intelligent power supply according to the rated voltage; Determine the overvoltage duration period according to the first voltage curve and the overvoltage critical point, and use the voltage curve corresponding to the overvoltage duration period as the third voltage curve; If there is a voltage greater than the withstand voltage value in the third voltage curve, the control protection device cuts off the output of the intelligent power supply at the time corresponding to the overvoltage critical point; If the voltages in the third voltage curve are all less than or equal to the withstand voltage value, then the voltage reduction control amount is determined according to the third voltage curve and the overvoltage protection threshold corresponding to the overvoltage critical point; Determine the voltage reduction control time according to the voltage reduction control amount; The control protection device reduces the voltage of the intelligent power supply at the voltage reduction control time so that the voltage corresponding to the overvoltage critical point is less than or equal to the overvoltage protection threshold corresponding to the overvoltage critical point.

[0108] In a possible embodiment, when the target critical point is an undervoltage critical point, in controlling the protection device to perform a power protection operation corresponding to the target critical point, the control unit 703 is specifically configured to: Determine the undervoltage duration period according to the first voltage curve and the undervoltage critical point, and use the voltage curve corresponding to the undervoltage duration period as the fourth voltage curve; determining a lowest voltage in the fourth voltage curve; Acquire a first load power corresponding to the undervoltage critical point from a load power curve; Determining a minimum input voltage of the load device according to the first load power; According to the minimum input voltage, the minimum undervoltage protection threshold of the intelligent power supply is determined; If the minimum voltage is greater than or equal to the minimum undervoltage protection threshold, the boost control amount is determined according to the undervoltage protection threshold corresponding to the undervoltage critical point and the minimum voltage, and the protection device is controlled to boost the intelligent power supply according to the boost control amount, so that the voltage at the moment corresponding to the undervoltage critical point is greater than or equal to the undervoltage protection threshold at that moment; If the lowest voltage is less than the minimum undervoltage protection threshold, a non-critical device in the load device is determined; The control protection device cuts off the power supply of the intelligent power supply to non-critical equipment at the moment corresponding to the undervoltage critical point.

[0109] In a possible embodiment, when the target critical point is the second critical point, in controlling the protection device to perform the power protection operation corresponding to the target critical point, the control unit 703 is specifically configured to: Determine the overcurrent duration period according to the first current curve and the second critical point, and use the current curve corresponding to the overcurrent duration period as the second current curve; Determining a current reduction control amount according to the second current curve; Determine the duty cycle of the smart power supply during the overcurrent duration period; Determining a target duty cycle according to the second current curve and the duty cycle; Determine the duration of the flow reduction control according to the flow reduction control amount and the target duty cycle; Determine the time of downflow regulation according to the duration of downflow regulation; The control protection device adjusts the duty cycle of the intelligent power supply to the target duty cycle at the current reduction control moment, so that the current at the moment corresponding to the second critical point is reduced to less than or equal to the overcurrent protection threshold at that moment.

[0110] In a possible embodiment, when the target critical point is the fourth critical point, in controlling the protection device to perform the power protection operation corresponding to the target critical point, the control unit 703 is specifically configured to: Determining the abnormal duration period according to the first ratio curve and the fourth critical point; Acquire a fifth voltage curve corresponding to the abnormal duration period from the first voltage curve; acquire a third current curve corresponding to the abnormal duration period from the first current curve; acquire a target load power curve corresponding to the abnormal duration period from the load power curve; Determine a reference voltage curve and a reference current curve according to a target load power curve; determining an abnormality type according to the fifth voltage curve, the third current curve, the reference voltage curve, and the reference current curve; If the abnormality type is a voltage mutation abnormality, the voltage stabilization ratio is determined according to the fifth voltage curve and the reference voltage curve; According to the voltage regulation ratio, the control protection device stabilizes the voltage of the intelligent power supply at the time corresponding to the fourth critical point; If the abnormality type is a sudden change in current, the steady current ratio is determined according to the third current curve and the reference current curve; According to the current stabilization ratio, the control protection device stabilizes the current of the intelligent power supply at the time corresponding to the fourth critical point.

[0111] In a possible embodiment, in determining the first voltage curve of the smart power supply in the future time period according to the historical voltage curve, the processing unit 702 is specifically configured to: Obtain c historical voltages corresponding to c moments from the historical voltage curve; each moment corresponds to a historical voltage; According to c historical voltages, an autocorrelation function and a partial autocorrelation function are determined; Determine the model order based on the autocorrelation function and partial autocorrelation function; Determining a first voltage curve prediction model according to the model order; According to the c historical voltages, parameters of the first voltage curve prediction model are estimated to obtain model parameters; Determining a second voltage curve prediction model according to the first voltage curve prediction model and model parameters; According to the historical voltage curve, the second voltage curve prediction model is verified to obtain the degree of fit; Determining a target voltage curve prediction model according to the second voltage curve prediction model and the degree of fitting; The data in the historical voltage curve is input into the target voltage curve prediction model to obtain a first voltage curve.

[0112] An embodiment of the present application also provides an intelligent power supply, which is used to power a load device; the intelligent power supply includes: a controller, a voltage sensor, a current sensor and a protection device; the controller includes: a processor and a memory, the processor is connected to the memory, the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the intelligent power supply executes to implement part or all of the steps of any one of the methods recorded in the above method embodiments.

[0113] An embodiment of the present application also provides a computer-readable storage medium, which stores a computer program. The computer program is executed by a processor to implement part or all of the steps of any one of the methods described in the above method embodiments.

[0114] An embodiment of the present application also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute part or all of the steps of any one of the methods recorded in the above method embodiments.

[0115] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required by the present application.

[0116] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0117] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the device or unit can be electrical or other forms.

[0118] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0119] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of a software program module.

[0120] If the integrated unit is implemented in the form of a software program module and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a memory, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned memory includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program codes.

[0121] A person skilled in the art may understand that all or part of the steps in the various methods of the above embodiments may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable memory, and the memory may include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0122] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, 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 application.

Claims

1. A power supply intelligent protection control method, characterized in that: A controller applied to an intelligent power supply, wherein the intelligent power supply is used to supply power to a load device, and the intelligent power supply further comprises: a voltage sensor, a current sensor and a protection device; the method comprises: Acquire a historical voltage data set collected by the voltage sensor and a historical current data set collected by the current sensor; the historical voltage data set includes i historical voltages, and the historical current data set includes j historical currents; i and j are both integers greater than or equal to 3; Performing curve fitting on the i historical voltages to obtain a historical voltage curve; Performing curve fitting on the j historical currents to obtain a historical current curve; Determine, according to the historical voltage curve, a first voltage curve of the smart power supply in a future time period; Determining, according to the historical current curve, a first current curve of the smart power supply in the future time period; Determining a load power curve of the load device in the future time period according to a preset power demand; Determining an overvoltage protection threshold curve and an undervoltage protection threshold curve of the smart power supply in the future time period according to the load power curve; Determining an overcurrent protection threshold curve of the smart power supply in the future time period according to the load power curve; Determine a target critical point according to the first voltage curve, the first current curve, the overvoltage protection threshold curve, the undervoltage protection threshold curve, and the overcurrent protection threshold curve; the target critical point is used to represent a point corresponding to a minimum time when an abnormality occurs in the first voltage curve and the first current curve; The protection device is controlled to perform a power protection operation corresponding to the target critical point.

2. The method according to claim 1, characterized in that The determining of the target critical point according to the first voltage curve, the first current curve, the overvoltage protection threshold curve, the undervoltage protection threshold curve, and the overcurrent protection threshold curve includes: Determine a first critical point according to the first voltage curve, the overvoltage protection threshold curve and the undervoltage protection threshold curve; the first critical point is used to represent the point at which the corresponding time of the overvoltage critical point and the undervoltage critical point in the first voltage curve is the smallest; the overvoltage critical point is used to represent the point at which the voltage in the first voltage curve is greater than or equal to the minimum time of the overvoltage protection threshold corresponding to the voltage; the undervoltage critical point is used to represent the point at which the voltage in the first voltage curve is less than or equal to the minimum time of the undervoltage protection threshold corresponding to the voltage; Determine a second critical point according to the first current curve and the overcurrent protection threshold curve; the second critical point is used to represent the point in the first current curve at which the current is greater than or equal to the minimum time of the overcurrent protection threshold corresponding to the current; Determine the critical point with the smallest corresponding time between the first critical point and the second critical point as the third critical point; Obtaining a voltage curve before the moment corresponding to the third critical point in the first voltage curve to obtain a second voltage curve; obtaining a current curve before the moment corresponding to the third critical point in the first current curve to obtain a second current curve; Determine a ratio of the voltage at each moment in the second voltage curve to the current at each moment in the second current curve to obtain a first ratio curve; Determining a fourth critical point according to the first ratio curve; the fourth critical point is used to represent a point corresponding to a minimum time when the ratio in the ratio curve does not fall within a preset ratio range; The point at which the corresponding time between the third critical point and the fourth critical point is the smallest is determined as the target critical point.

3. The method according to claim 2, characterized in that The determining of the first critical point according to the first voltage curve, the overvoltage protection threshold curve and the undervoltage protection threshold curve comprises: Divide the overvoltage protection threshold curve into m overvoltage protection threshold line segments; m is a positive integer; The line segment of the m overvoltage protection threshold line segments, the starting time of which is the same as the starting time of the future time period, is used as the first overvoltage protection threshold line segment; Determine a first overvoltage protection threshold corresponding to the first overvoltage protection threshold line segment, determine a first starting time corresponding to the first overvoltage protection threshold line segment, and obtain a first voltage in the first voltage curve corresponding to the first starting time; If the first voltage is greater than the first overvoltage protection threshold, determining a point in the first voltage curve corresponding to the first starting time as the overvoltage critical point; If the first voltage is less than or equal to the first overvoltage protection threshold, then determining n intersection points of the first voltage curve and the first overvoltage protection threshold line segment; n is a natural number; Determine n slopes corresponding to the n intersection points in the first voltage curve, wherein each intersection point corresponds to a slope; If there is a slope greater than zero among the n slopes, then determining the intersection point among the n intersection points whose slope is greater than zero and whose corresponding time is the smallest as the overvoltage critical point; If there is no slope greater than zero among the n slopes, determining a second overvoltage protection threshold line segment from the m overvoltage protection threshold line segments; a second starting time corresponding to the second overvoltage protection threshold line segment is the same as an end time corresponding to the first overvoltage protection threshold line segment; using the second overvoltage protection threshold line segment as the first overvoltage protection threshold line segment until the overvoltage critical point is determined; Determining the undervoltage critical point according to the first voltage curve and the undervoltage protection threshold curve; The earliest corresponding point between the overvoltage critical point and the undervoltage critical point is determined as the first critical point.

4. The method according to claim 2 or 3, characterized in that: When the target critical point is the overvoltage critical point, controlling the protection device to perform a power supply protection operation corresponding to the target critical point includes: Obtaining the rated voltage of the intelligent power supply; Determining a withstand voltage value of the intelligent power supply according to the rated voltage; Determine an overvoltage duration period according to the first voltage curve and the overvoltage critical point, and use a voltage curve corresponding to the overvoltage duration period as a third voltage curve; If there is a voltage greater than the withstand voltage value in the third voltage curve, controlling the protection device to cut off the output of the intelligent power supply at a time corresponding to the overvoltage critical point; If the voltages in the third voltage curve are all less than or equal to the withstand voltage value, determining the voltage reduction control amount according to the third voltage curve and the overvoltage protection threshold corresponding to the overvoltage critical point; Determining a voltage reduction control time according to the voltage reduction control amount; The protection device is controlled to reduce the voltage of the intelligent power supply at the voltage reduction control time, so that the voltage corresponding to the overvoltage critical point is less than or equal to the overvoltage protection threshold corresponding to the overvoltage critical point.

5. The method according to claim 2 or 3, characterized in that: When the target critical point is the undervoltage critical point, controlling the protection device to perform a power supply protection operation corresponding to the target critical point includes: Determine an undervoltage duration period according to the first voltage curve and the undervoltage critical point, and use a voltage curve corresponding to the undervoltage duration period as a fourth voltage curve; determining a lowest voltage in the fourth voltage curve; Acquire a first load power corresponding to the undervoltage critical point from the load power curve; Determining a minimum input voltage of the load device according to the first load power; Determining a minimum undervoltage protection threshold of the intelligent power supply according to the minimum input voltage; If the minimum voltage is greater than or equal to the minimum undervoltage protection threshold, a boost control amount is determined according to the undervoltage protection threshold corresponding to the undervoltage critical point and the minimum voltage, and according to the boost control amount, the protection device is controlled to boost the intelligent power supply so that the voltage at the moment corresponding to the undervoltage critical point is greater than or equal to the undervoltage protection threshold at that moment; If the minimum voltage is less than the minimum undervoltage protection threshold, determining a non-critical device in the load device; The protection device is controlled to cut off the power supply of the intelligent power supply to the non-critical device at the moment corresponding to the undervoltage critical point.

6. The method according to claim 2 or 3, characterized in that: When the target critical point is the second critical point, controlling the protection device to perform a power protection operation corresponding to the target critical point includes: Determine an overcurrent duration period according to the first current curve and the second critical point, and use the current curve corresponding to the overcurrent duration period as the second current curve; Determining a current reduction control amount according to the second current curve; Determining a duty cycle of the intelligent power supply during the overcurrent duration period; Determining a target duty cycle according to the second current curve and the duty cycle; Determining a flow reduction control duration according to the flow reduction control amount and the target duty cycle; Determining the downflow control time according to the downflow control duration; The protection device is controlled to adjust the duty cycle of the intelligent power supply to the target duty cycle at the current reduction control moment, so that the current at the moment corresponding to the second critical point is reduced to less than or equal to the overcurrent protection threshold at the moment.

7. The method according to claim 2 or 3, characterized in that: When the target critical point is the fourth critical point, controlling the protection device to perform a power protection operation corresponding to the target critical point includes: Determining an abnormal duration period according to the first ratio curve and the fourth critical point; Acquire a fifth voltage curve corresponding to the abnormal duration period from the first voltage curve; acquire a third current curve corresponding to the abnormal duration period from the first current curve; acquire a target load power curve corresponding to the abnormal duration period from the load power curve; Determining a reference voltage curve and a reference current curve according to the target load power curve; determining an abnormality type according to the fifth voltage curve, the third current curve, the reference voltage curve, and the reference current curve; If the abnormality type is a voltage mutation abnormality, determining a voltage stabilization ratio according to the fifth voltage curve and the reference voltage curve; According to the voltage regulation ratio, controlling the protection device to stabilize the voltage of the intelligent power supply at a time corresponding to the fourth critical point; If the abnormality type is a sudden current change abnormality, determining a steady current ratio according to the third current curve and the reference current curve; According to the current stabilization ratio, the protection device is controlled to stabilize the current of the intelligent power supply at a time corresponding to the fourth critical point.

8. The method according to claim 2 or 3, characterized in that: The step of determining a first voltage curve of the smart power supply in a future time period according to the historical voltage curve includes: Obtaining c historical voltages corresponding to c moments from the historical voltage curve; each moment corresponds to a historical voltage; Determining an autocorrelation function and a partial autocorrelation function according to the c historical voltages; Determining a model order according to the autocorrelation function and the partial autocorrelation function; Determining a first voltage curve prediction model according to the model order; According to the c historical voltages, performing parameter estimation on the first voltage curve prediction model to obtain model parameters; Determining a second voltage curve prediction model according to the first voltage curve prediction model and the model parameters; According to the historical voltage curve, verifying the second voltage curve prediction model to obtain a fitting degree; determining a target voltage curve prediction model according to the second voltage curve prediction model and the fitting degree; The data in the historical voltage curve is input into the target voltage curve prediction model to obtain the first voltage curve.

9. A power supply intelligent protection control device, characterized in that: The device is located in an intelligent power supply, and the intelligent power supply is used to supply power to a load device. The intelligent power supply also includes: a voltage sensor, a current sensor, and a protection device; the device includes: An acquisition unit, used to acquire a historical voltage data set collected by the voltage sensor and a historical current data set collected by the current sensor; the historical voltage data set includes i historical voltages, and the historical current data set includes j historical currents; i and j are both integers greater than or equal to 3; A processing unit, configured to perform curve fitting on the i historical voltages to obtain a historical voltage curve; Performing curve fitting on the j historical currents to obtain a historical current curve; Determine, according to the historical voltage curve, a first voltage curve of the smart power supply in a future time period; Determining, according to the historical current curve, a first current curve of the smart power supply in the future time period; Determining a load power curve of the load device in the future time period according to a preset power demand; Determining an overvoltage protection threshold curve and an undervoltage protection threshold curve of the smart power supply in the future time period according to the load power curve; Determining an overcurrent protection threshold curve of the smart power supply in the future time period according to the load power curve; Determine a target critical point according to the first voltage curve, the first current curve, the overvoltage protection threshold curve, the undervoltage protection threshold curve, and the overcurrent protection threshold curve; the target critical point is used to represent a point corresponding to a minimum time when an abnormality occurs in the first voltage curve and the first current curve; A control unit is used to control the protection device to perform a power supply protection operation corresponding to the target critical point.

10. An intelligent power supply, characterized in that: The intelligent power supply is used to supply power to the load device; The intelligent power supply includes: a controller, a voltage sensor, a current sensor and a protection device; the controller includes: a processor and a memory, the processor is connected to the memory, the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the intelligent power supply executes the method described in any one of claims 1-8.

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