Intelligent Power Protection Control Method, Device and Intelligent Power Supply

Abstract

The present application discloses an intelligent power protection control method, device, and intelligent power supply. The method includes: performing curve fitting on i historical voltages to obtain a historical voltage curve; performing curve fitting on 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 the 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 a protection device to perform a power protection operation corresponding to the target critical point. The present application is beneficial to improving the safety of the intelligent power supply.

Description

Technical Field

[0001] This application relates to the technical field of power protection, and particularly to an intelligent power protection control method, device, and intelligent power supply. Background Art

[0002] An intelligent 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 intelligent power supply can adjust the output voltage in real time to ensure the stable operation of the load device.

[0003] When supplying power to a load device through an intelligent power supply, it is necessary to monitor the operating state of the power supply in real time. Once faults such as overvoltage, undervoltage, and overcurrent are detected, protection measures should be taken quickly and an alarm signal should be sent 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 a remote terminal, and can also perform remote control and parameter settings.

[0004] In the prior art, protection measures are usually taken to protect the intelligent power supply only when the intelligent power supply has failed, and the power supply protection is not timely, resulting in low safety of the power supply. Summary of the Invention

[0005] To solve the above problems existing in the prior art, embodiments of this application provide an intelligent power protection control method, device, and intelligent power supply. By using the historical voltage curve obtained by fitting the historical voltage of the intelligent power supply, the first voltage curve of the intelligent power supply in a future time period is predicted, and by using the historical current curve obtained by fitting the historical current of the intelligent power supply, the first current curve of the intelligent power supply in a future time period is predicted. 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, and thus, 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 the protection device is controlled to perform a power supply protection operation corresponding to the target critical point. In this way, the target critical point where abnormalities will occur in the future time period can be predicted in advance, and the power supply protection operation can be performed in advance to ensure the safety of the intelligent power supply.

[0006] In a first aspect, embodiments of this application provide an intelligent power protection control method, which is applied to a controller of an intelligent power supply. The intelligent power supply is used to supply power to a load device, and the intelligent power supply further includes: a voltage sensor, a current sensor, and a protection device; the method includes:

[0007] Obtain the historical voltage dataset collected by the voltage sensor and the historical current dataset collected by the current sensor; the historical voltage dataset includes i historical voltages, and the historical current dataset includes j historical currents; both i and j are integers greater than or equal to 3;

[0008] Perform curve fitting on the i historical voltages to obtain a historical voltage curve;

[0009] Perform curve fitting on the j historical currents to obtain a historical current curve;

[0010] According to the historical voltage curve, determine the first voltage curve of the intelligent power supply in the future time period;

[0011] According to the historical current curve, determine the first current curve of the intelligent power supply in the future time period;

[0012] According to the preset power consumption demand, determine the load power curve of the load device in the future time period;

[0013] According to the load power curve, determine the overvoltage protection threshold curve and undervoltage protection threshold curve of the intelligent power supply in the future time period;

[0014] According to the load power curve, determine the overcurrent protection threshold curve of the intelligent power supply in the future time period;

[0015] 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, determine the target critical point; the target critical point is used to represent the point corresponding to the earliest moment when an abnormality appears in the first voltage curve and the first current curve;

[0016] Control the protection device to perform a power protection operation corresponding to the target critical point.

[0017] In a second aspect, an embodiment of the present application provides a power intelligent protection control device, the device is located in an intelligent power supply, the intelligent power supply is used to supply power to a load device, and the intelligent power supply further includes: a voltage sensor, a current sensor, and a protection device; the device includes:

[0018] An acquisition unit, configured to acquire the historical voltage dataset collected by the voltage sensor and the historical current dataset collected by the current sensor; the historical voltage dataset includes i historical voltages, and the historical current dataset includes j historical currents; both i and j are integers greater than or equal to 3;

[0019] A processing unit, configured to perform curve fitting on the i historical voltages to obtain a historical voltage curve;

[0020] Perform curve fitting on the j historical currents to obtain a historical current curve;

[0021] Determine a first voltage curve of the intelligent power supply in a future time period according to the historical voltage curve;

[0022] Determine a first current curve of the intelligent power supply in the future time period according to the historical current curve;

[0023] Determine a load power curve of the load device in the future time period according to a preset power consumption requirement;

[0024] Determine an overvoltage protection threshold curve and an undervoltage protection threshold curve of the intelligent power supply in the future time period according to the load power curve;

[0025] Determine an overcurrent protection threshold curve of the intelligent power supply in the future time period according to the load power curve;

[0026] 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 earliest moment when an abnormality appears in the first voltage curve and the first current curve;

[0027] A control unit, configured to control the protection device to perform a power protection operation corresponding to the target critical point.

[0028] In a third aspect, an embodiment of the present application provides an intelligent power supply for supplying power to 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 the method as described in the first aspect.

[0029] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program, and the computer program is executed by a processor to implement the method as described in the first aspect.

[0030] 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 as described in the first aspect.

[0031] Implementing the embodiments of the present application has the following beneficial effects:

[0032] 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, 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. According to the historical voltage curve, a first voltage curve of the intelligent power supply in the future time period is determined, and according to the historical current curve, a first current curve of the intelligent power supply in the future time period is determined. Next, according to the preset power consumption requirements, a load power curve of the load device in the future time period is determined. According to the load power curve, an overvoltage protection threshold curve and an undervoltage protection threshold curve of the intelligent power supply in the future time period are determined. According to the load power curve, an 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, a target critical point is determined. Finally, the protection device is controlled to perform a power protection operation corresponding to the target critical point. Thus, by predicting the voltage curve, current curve, overvoltage protection threshold curve, and undervoltage protection threshold curve of the intelligent power supply in the future time period, the target critical point where the intelligent power supply first appears abnormal in the future time period can be predicted, so as to control the protection device in advance to perform a power protection operation corresponding to the target critical point, timely protect the intelligent power supply, and improve the safety of the power supply. Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 Schematic diagram of an application scenario of a power intelligent protection control method provided by an embodiment of the present application;

[0035] Figure 2 Schematic diagram of a flow of a power intelligent protection control method provided by an embodiment of the present application;

[0036] Figure 3 Schematic diagram of a historical voltage curve and a first voltage curve provided by an embodiment of the present application;

[0037] Figure 4 Schematic diagram of a historical current curve and a first current curve provided by an embodiment of the present application;

[0038] Figure 5 Schematic diagram of a load power curve provided by an embodiment of the present application;

[0039] Figure 6 Schematic diagram of a method for determining a target critical point provided by an embodiment of the present application;

[0040] Figure 7 Block diagram of the functional units of a power intelligent protection control device provided by an embodiment of the present application. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0042] The terms "first", "second", "third", "fourth", etc. in the specification and claims of the present application and the accompanying drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. 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 may optionally further include steps or modules not listed, or may optionally further include other steps or modules inherent to these processes, methods, products, or devices.

[0043] Referring to "embodiment" herein means that a specific feature, result, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0044] First, refer to Figure 1 , Figure 1 Schematic diagram of an application scenario of a power intelligent protection control method provided by an embodiment of the present application. As shown in Figure 1 , the intelligent power supply is connected to the load device through a wire and is mainly used to supply power to the load device. Among them, there may be multiple load devices, such as three load devices are exemplarily shown in Figure 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 communicatively connected to the controller through wires.

[0045] Among them, a load device refers to a device that consumes electrical energy or receives electrical energy from a power source in a circuit and converts the electrical energy into other forms of energy. For example, electric lights, electric water heaters, elevators, etc. A smart power supply is a power supply device that integrates power electronics technology, automatic control technology, sensor technology, communication technology, etc. and has intelligent functions. The smart power supply can monitor its own operating parameters in real time. For example, the output voltage is monitored through a voltage sensor, the output current is monitored through a current sensor, and the output power of the smart power supply is determined based on the voltage collected by the voltage sensor and the current collected by the current sensor. Optionally, the smart power supply may further include a temperature sensor for monitoring the operating temperature of the smart power supply.

[0046] Among them, the controller is a key component for high-performance data analysis and processing in the smart power supply. It 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 smart power supply to control each functional module of the smart power supply. The controller may include, for example, at least one of the following: a microcontroller unit (MCU), a digital signal processor (DSP), a microprocessor unit (MPU), etc. This application does not make any limitations in this regard.

[0047] Among them, the protection device is mainly used to adjust parameters such as the output voltage, output current, and output power of the smart power supply based on the control signal of the controller, so that the relevant parameters of the smart power supply all operate within the expected parameter range, ensuring the stable operation of the smart power supply. Optionally, the protection device may include at least one of the following: a power switch tube, a digital potentiometer, a voltage regulator, a current stabilizer, etc. The power switch tube is used to cut off the output of the smart power supply, the digital potentiometer is used to adjust the output voltage or output current of the smart power supply, the voltage regulator is used to stabilize the output voltage of the smart power supply, and the current stabilizer is used to stabilize the output current of the smart power supply. Optionally, the protection device may be integrated into the controller of the smart power supply.

[0048] It should be noted that the controller can monitor parameters such as the voltage, current, and power of the smart power supply in real time. When the parameters such as the voltage, current, and power of the smart power supply are in an abnormal range, the controller will control the protection device to perform corresponding protection operations to ensure the safe operation of the smart power supply. However, performing protection operations only after detecting that the corresponding parameters are abnormal results in untimely power protection, which easily damages the smart power supply and the power supply has low safety.

[0049] Therefore, when applied to the above scenario, in the intelligent power protection control method provided by this application, the controller acquires the historical voltage data set collected by the voltage sensor and the 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; both i and j are integers greater than or equal to 3.

[0050] The controller performs curve fitting on the i historical voltages to obtain a historical voltage curve.

[0051] The controller performs curve fitting on the j historical currents to obtain a historical current curve.

[0052] The controller determines the first voltage curve of the intelligent power supply in the future time period according to the historical voltage curve.

[0053] The controller determines the first current curve of the intelligent power supply in the future time period according to the historical current curve.

[0054] The controller determines the load power curve of the load device in the future time period according to the preset power consumption requirements.

[0055] The controller determines the overvoltage protection threshold curve and undervoltage protection threshold curve of the intelligent power supply in the future time period according to the load power curve.

[0056] The controller determines the overcurrent protection threshold curve of the intelligent power supply in the future time period according to the load power curve.

[0057] The controller determines 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 target critical point is used to represent the point corresponding to the earliest moment when an abnormality appears in the first voltage curve and the first current curve.

[0058] The controller controls the protection device to perform a power protection operation corresponding to the target critical point.

[0059] It can be seen that when applied to the above scenario, the controller can obtain the historical voltage curve by performing curve fitting on the i historical voltages collected by the voltage sensor, and predict the first voltage curve of the intelligent power supply in the future time period based on the historical voltage curve. By performing curve fitting on the j historical currents collected by the current sensor, the historical current curve can be obtained, and the first voltage curve of the intelligent 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 according to the power consumption demand of the load device in the future time period. Then, 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, the target critical point is determined, and further the protection device is controlled to perform the power supply protection operation corresponding to the target critical point, so as to perform the protection operation in advance on the abnormalities occurring in the future time period, ensure the stable operation of the power supply, and improve the safety of power supply operation.

[0060] See Figure 2 , Figure 2 FIG. is a schematic flow chart of a power intelligent protection control method provided by an embodiment of the present application. This method is applied to the controller of an intelligent power supply, and the intelligent power supply is used to supply power to a load device. The intelligent power supply further includes: a voltage sensor, a current sensor, and a protection device. This method includes but is not limited to the following steps:

[0061] S201: Obtain the historical voltage data set collected by the voltage sensor and the historical current data set collected by the current sensor.

[0062] 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. Both i and j are integers greater than or equal to 3.

[0063] It can be understood that both the voltage sensor and the current sensor are electronic devices that perform data sampling periodically. In order to ensure that the sampled voltage and current can reflect the current operating state of the intelligent power supply, only the i historical voltages before the current moment and the sampling moments corresponding to each historical voltage are retained on the voltage sensor, and only the j historical currents before the current moment and the sampling moments corresponding to each historical current are retained on the current sensor. The controller can obtain the i historical voltages and the sampling moments corresponding to each historical voltage, and the j historical currents and the sampling moments corresponding to each historical current, so as to analyze the operating state of the intelligent power supply.

[0064] S202: Perform curve fitting on the i historical voltages to obtain the historical voltage curve.

[0065] In an embodiment of the present application, the historical voltage curve is a two-dimensional curve, where the abscissa represents time and the ordinate represents the historical voltage, 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 moments corresponding to each historical voltage to obtain the historical voltage curve. Optionally, the CurveFitter tool can be used for curve fitting.

[0066] S203: Perform curve fitting on the j historical currents to obtain the historical current curve.

[0067] In an embodiment of the present application, the historical current curve is a two-dimensional curve, where the abscissa represents time and the ordinate represents the historical current, 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 moments corresponding to each historical current to obtain the historical current curve. Optionally, the CurveFitter tool can be used for curve fitting.

[0068] S204: Determine the first voltage curve of the intelligent power supply in the future time period according to the historical voltage curve.

[0069] In an 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 according to the historical voltage curve of the intelligent power supply to predict the voltage of the intelligent power supply in the future time period through the target voltage curve prediction model and obtain the first voltage curve.

[0070] Exemplarily, determining the first voltage curve of the intelligent power supply in the future time period according to the historical voltage curve may include:

[0071] Obtain c historical voltages corresponding to c moments from the historical voltage curve; each moment corresponds to one historical voltage;

[0072] Determine the autocorrelation function and the partial autocorrelation function according to the c historical voltages;

[0073] Determine the model order according to the autocorrelation function and the partial autocorrelation function;

[0074] Determine the first voltage curve prediction model according to the model order;

[0075] Perform parameter estimation on the first voltage curve prediction model according to the c historical voltages to obtain the model parameters;

[0076] Determine the second voltage curve prediction model according to the first voltage curve prediction model and the model parameters;

[0077] Verify the second voltage curve prediction model according to the historical voltage curve to obtain the fitting degree;

[0078] Determine the target voltage curve prediction model according to the second voltage curve prediction model and the fitting degree.

[0079] Input the data in the historical voltage curve into the target voltage curve prediction model to obtain the first voltage curve.

[0080] In the embodiment of the present application, the target voltage curve prediction model can be an AutoRegressive Model (AR), which is a prediction model that predicts the data of the next time series according to the data of the historical time series. The controller of the intelligent power supply can construct the target voltage curve prediction model according to the historical voltages in the historical voltage curve to predict the voltage in the future time period, so as to obtain the first voltage curve.

[0081] Specifically, the controller obtains c historical voltages corresponding to c moments from the historical voltage curve, where the time interval between any two adjacent moments among the c moments is 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.

[0082] Further, determine the Autocorrelation Function (ACF) according to the c historical voltages. The autocorrelation function is used to measure the linear correlation between the historical voltages at different moments among the c moments. Among them, the autocorrelation function can be represented by the ratio of the autocovariance of the k-th 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-th lag = E[(U t - μ)(U t+k - μ)], where E[] represents solving 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 the c historical voltages. Based on this, the autocorrelation function can be determined. Then, determine the Partial Autocorrelation Function (PACF) according to the c historical voltages. The partial autocorrelation function is used to measure the correlation between any two historical voltages after removing the influence of the historical voltages at the intermediate moments. 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 through the function graphs of the autocorrelation function and the partial autocorrelation function. For example, the partial autocorrelation function of the p-th order autoregressive model truncates after the p-th order, and the autocorrelation function tails after the p-th order, where p is a positive integer.

[0083] Further, the controller determines a first voltage curve prediction model according to the model order, and the first voltage curve prediction model can be expressed by the following formula (1):

[0084] Formula (1)

[0085] wherein, 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 t-p, , , represent model parameters, represents the deviation noise.

[0086] Further, the controller estimates the parameters of the first voltage curve prediction model according to c historical voltages. Among them, the parameter estimation can adopt any one of the following methods: moment estimation method, least squares estimation method, maximum likelihood estimation method. This application does not make specific limitations on this. Through parameter estimation, the model parameters can be determined. Then, the model parameters are substituted into the first voltage curve prediction model to obtain a second voltage curve prediction model. Next, the controller obtains any c historical voltages from the historical voltage curve at a preset time interval, and verifies the second voltage curve prediction model to determine the fitting degree of the second voltage curve prediction model. The fitting degree can be represented by mean square error, root mean square error, mean absolute error, etc. When the fitting degree is greater than or equal to the preset fitting degree, the second voltage curve prediction model is determined as the target voltage curve prediction model; otherwise, parameter estimation is performed again to obtain a new second voltage curve prediction model until the fitting degree of the new second voltage curve prediction model is greater than or equal to the preset fitting degree.

[0087] Finally, the controller can obtain a new c historical voltages from the historical voltage curve at a preset time interval, input the new c historical voltages into the target voltage curve prediction model to obtain the voltage at the next moment, and continue the prediction according to the voltage at the next moment and c-1 historical voltages among the new c historical voltages until d voltages in the future time period are obtained. Curve fitting is performed on the d voltages to obtain the first voltage curve. Optionally, the CurveFitter tool can be used for curve fitting.

[0088] Thus, based on 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, thereby constructing a target voltage curve prediction model to predict the first voltage curve of the intelligent power supply in a future time period, so as to understand the voltage change of the intelligent power supply in the future time period, and then perform protection operations on possible abnormalities in a timely manner to improve the safety of the intelligent power supply.

[0089] Exemplarily, the historical voltage curve and the first voltage curve can be as Figure 3 shown. In Figure 3 the coordinate system, t0, t1, and t2 on the horizontal axis represent moments, and U on the vertical axis represents voltage. The curve between t1 and t0 is the historical voltage curve, and the curve between t0 and t2 is the first voltage curve.

[0090] S205: Determine the first current curve of the intelligent power supply in a future time period according to the historical current curve.

[0091] In the embodiments of the present application, the method for determining the first current curve of the intelligent power supply in a future time period according to the historical current curve is similar to the method for determining the first voltage curve of the intelligent power supply in a future time period according to the historical voltage curve, and will not be elaborated here.

[0092] Exemplarily, the historical current curve and the first current curve can be as Figure 4 shown. In Figure 4 the coordinate system, t0, t2, and t3 on the horizontal axis represent moments, and I on the vertical axis represents current. The curve between t3 and t0 is the historical current curve, and the curve between t0 and t2 is the first current curve.

[0093] S206: Determine the load power curve of the load device in a future time period according to the preset power consumption demand.

[0094] In the embodiments of the present application, the preset power consumption demand can be set in advance by the user. For example, if the mobile phone needs to be charged from 50% to 80%, the preset power consumption 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 a future time period according to the preset power consumption demand. Among them, the load power curve consists of straight lines in multiple time periods. In the coordinate system as Figure 5 shown, t0, t4, t5, and t6 represent moments, P1, P2, and P3 represent power. The load power is P1 in the time period from t0 to t4, the load power is P2 in the time period from t4 to t5, and the load power is P3 in the time period from t5 to t6. It can be understood that the magnitude of the load power in each time period is related to the number of load devices connected in that time period.

[0095] S207: Determine the overvoltage protection threshold curve and undervoltage protection threshold curve of the intelligent power supply in the future time period according to the load power curve.

[0096] 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 damage to the intelligent power supply caused by excessive voltage, and the undervoltage protection threshold is a voltage critical value set to prevent the load device from malfunctioning due to too low voltage.

[0097] It can be understood that most of the 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 influence of the 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 undervoltage protection threshold can be preset according to the actual test results. In this way, according to 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, which are not shown here.

[0098] S208: Determine the overcurrent protection threshold curve of the intelligent power supply in the future time period according to the load power curve.

[0099] 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. Among them, 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, which will not be elaborated here.

[0100] S209: 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.

[0101] In the embodiment of the present application, the target critical point is used to represent the point corresponding to the earliest moment when an abnormality appears in the first voltage curve and the first current curve. The controller can determine the points where overvoltage abnormality, undervoltage abnormality, overcurrent abnormality, voltage mutation abnormality, and current mutation abnormality occur in the intelligent power supply in the future time period 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 take the point corresponding to the earliest moment when the abnormality appears as the target critical point.

[0102] Exemplarily, 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 may include:

[0103] Determining a first critical point according to the first voltage curve, the overvoltage protection threshold curve, and the undervoltage protection threshold curve;

[0104] Determining a second critical point according to the first current curve and the overcurrent protection threshold curve;

[0105] Determining the critical point with the smallest corresponding moment among the first critical point and the second critical point as the third critical point;

[0106] Obtaining the voltage curve before the moment corresponding to the third critical point in the first voltage curve to obtain a second voltage curve;

[0107] Determining 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;

[0108] Determining a fourth critical point according to the first ratio curve;

[0109] Determining the point with the smallest corresponding moment among the third critical point and the fourth critical point as the target critical point.

[0110] In the embodiments of the present application, the first critical point is used to represent the point with the smallest corresponding moment 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 the smallest moment when the voltage in the first voltage curve is greater than or equal to the overvoltage protection threshold corresponding to the voltage. The undervoltage critical point is used to represent the point at the smallest moment when the voltage in the first voltage curve is less than or equal to the undervoltage protection threshold corresponding to the voltage. The second critical point is used to represent the point at the smallest moment when the current in the first current curve is greater than or equal to the overcurrent protection threshold corresponding to the current. The fourth critical point is used to represent the point corresponding to the smallest moment when the ratio in the ratio curve does not fall within the preset ratio range.

[0111] Specifically, the controller first determines the overvoltage critical point at the smallest moment when the voltage is greater than or equal to the overvoltage protection threshold corresponding to the voltage according to the first voltage curve and the overvoltage protection threshold curve. Then, according to the first voltage curve and the undervoltage protection threshold curve, the undervoltage critical point at the smallest moment when the voltage is less than or equal to the undervoltage protection threshold corresponding to the voltage is determined. Thus, the first critical point is determined according to the overvoltage critical point and the undervoltage critical point.

[0112] Exemplarily, determining a first critical point according to the first voltage curve, the overvoltage protection threshold curve, and the undervoltage protection threshold curve may include:

[0113] Dividing the overvoltage protection threshold curve into m overvoltage protection threshold line segments;

[0114] Take the segments among the m overvoltage protection threshold segments whose starting times are the same as the starting time of the future time period as the first overvoltage protection threshold segments;

[0115] Determine the first overvoltage protection threshold corresponding to the first overvoltage protection threshold segment, and determine the first starting time corresponding to the first overvoltage protection threshold segment, and obtain the first voltage corresponding to the first starting time in the first voltage curve;

[0116] If the first voltage is greater than the first overvoltage protection threshold, determine the point corresponding to the first starting time in the first voltage curve as the overvoltage critical point;

[0117] If the first voltage is less than or equal to the first overvoltage protection threshold, determine the n intersection points of the first voltage curve and the first overvoltage protection threshold segment;

[0118] Determine the n slopes corresponding to the n intersection points in the first voltage curve; each intersection point corresponds to one slope;

[0119] If there is a slope greater than zero among the n slopes, determine the intersection point with the slope greater than zero and the smallest corresponding time among the n intersection points as the overvoltage critical point;

[0120] If there is no slope greater than zero among the n slopes, determine the second overvoltage protection threshold segment from the m overvoltage protection threshold segments; the second starting time corresponding to the second overvoltage protection threshold segment is the same as the cut-off time corresponding to the first overvoltage protection threshold segment;

[0121] Take the second overvoltage protection threshold segment as the first overvoltage protection threshold segment until the overvoltage critical point is determined;

[0122] Determine the undervoltage critical point according to the first voltage curve and the undervoltage protection threshold curve;

[0123] Determine the point with the earliest corresponding time among the overvoltage critical point and the undervoltage critical point as the first critical point.

[0124] In the embodiments of the present application, m is a positive integer and n is a natural number.

[0125] Specifically, the controller first divides the curve into m overvoltage protection threshold segments according to the overvoltage protection thresholds in the overvoltage protection threshold curve, and each overvoltage protection threshold segment corresponds to an overvoltage protection threshold. For example, Figure 6 the three separated segments Ua1, Ua2, and Ua3 in are the overvoltage protection threshold segments, Figure 6 and the curve in is the first voltage curve. The controller will take the segments among the m overvoltage protection threshold segments whose starting times are the same as the starting time of the future time period as the first overvoltage protection threshold segments, that is, Figure 6 the segment from t0 to t7 in is taken as the first overvoltage protection threshold segment.

[0126] Then, the controller determines the first overvoltage protection threshold Ua1 corresponding to the first overvoltage protection threshold line segment, and determines the first starting time t0 corresponding to the first overvoltage protection threshold line segment. The controller obtains the first voltage U1 corresponding to the first starting time in the first voltage curve.

[0127] If the first voltage is greater than the first overvoltage protection threshold, it indicates that overvoltage abnormality occurs at the first starting time. The controller determines the point corresponding to the first starting time t0 in the first voltage curve as the overvoltage critical point.

[0128] If the first voltage is less than or equal to the first overvoltage protection threshold, the controller determines n intersection points of the first voltage curve and the first overvoltage protection threshold line segment. If there is no intersection point between the first voltage curve and the first overvoltage protection threshold line segment, as Figure 6 shown, there is no intersection point between the first voltage curve and Ua1 from t0 to t7, then the cut-off time of the first overvoltage protection threshold line segment is used as the new first starting time, and the overvoltage protection threshold line segment corresponding to the new first starting time is used as the first overvoltage protection threshold line segment to determine the intersection point of the first voltage curve and the first overvoltage protection threshold line segment. As Figure 6 shown, there is an intersection point between the first voltage curve and Ua2 at the moment Ti. After determining the n intersection points, the controller determines the slope of the first voltage curve at each intersection point to obtain n slopes.

[0129] If there is a slope greater than zero among the n slopes, the voltage at the next moment of the intersection point with a slope greater than zero will surely exceed the overvoltage protection threshold. As Figure 6 shown, at the intersection point at the moment Ti, the slope of the curve is greater than zero. After passing through Ti, the voltage of the first voltage curve will exceed the overvoltage protection threshold. Therefore, the controller determines the point with the smallest moment among the intersection points with a slope greater than zero among the n intersection points as the overvoltage critical point.

[0130] If there is no slope greater than zero among the n slopes, it means that all the n intersection points are the tangent points of the first voltage curve and the first overvoltage protection threshold line segment, and all voltages within 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 uses the second overvoltage protection threshold line segment as the first overvoltage protection threshold line segment and continues to determine the overvoltage critical point until the overvoltage critical point is determined.

[0131] Furthermore, the controller determines the undervoltage critical point where undervoltage abnormality first occurs according to the first voltage curve and the undervoltage protection threshold curve. The processing method for determining the undervoltage critical point is similar to that for determining the overvoltage critical point, which will not be elaborated here.

[0132] 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 taken as the first critical point; otherwise, the undervoltage critical point will be taken as the first critical point.

[0133] 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 sequence, 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, and thus the point with the earliest corresponding moment among the overvoltage critical point and the undervoltage critical point is taken as the first critical point. In this way, the critical point where overvoltage anomaly or undervoltage anomaly first appears can be determined, and the protection operation can be executed in a timely manner to improve the safety of the intelligent power supply.

[0134] Then, the controller will determine the second critical point according to the first current curve and the overcurrent protection threshold curve. Among them, the method of determining the second critical point according to the first current curve and the overcurrent protection threshold curve is similar to the method of determining the overvoltage critical point according to the first voltage curve and the overvoltage protection threshold curve, and will not be elaborated here.

[0135] Based on this, the controller will take the critical point with the smallest corresponding moment among the first critical point and the second critical point as the third critical point. Obtain the voltage curve before the moment corresponding to the third critical point from the first voltage curve to get the second voltage curve, and obtain the current curve before the moment corresponding to the third critical point from the first current curve to get the second current curve.

[0136] It should be noted that if there are voltage mutations or current mutations in the power supply within a short period of time, the mutated 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 are voltage mutation anomalies or current mutation anomalies before the third critical point.

[0137] The controller will 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 the first ratio curve. Then, determine whether each ratio in the first ratio curve falls within the preset ratio range, and take the point corresponding to the smallest moment when the ratio does not fall within the preset ratio range as the fourth critical point. And take the point with the smallest corresponding moment among the third critical point and the fourth critical point as the target critical point.

[0138] It can be seen that through the first voltage curve, the overvoltage protection threshold curve, and the undervoltage protection threshold curve, the first critical point can be determined. According to the first current curve and the overcurrent protection threshold curve, the second critical point can be determined, and the point with the smallest corresponding time among the first critical point and the second critical point is used 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. Thus, the point with the smallest corresponding time among the third critical point and the fourth critical point is used as the target critical point. In this way, the critical point where an anomaly first occurs in the future time period can be determined, and the corresponding protection operation can be executed in a timely manner to improve the safety of the intelligent power supply.

[0139] S210: Control the protection device to perform a power supply protection operation corresponding to the target critical point.

[0140] In the embodiment of the present application, the controller can control the protection device to perform operations such as cutting off the power output, boosting the voltage, reducing the voltage, stabilizing the voltage, and stabilizing the current to protect the intelligent power supply. The executed power supply protection operation corresponds to the type of anomaly at the target critical point.

[0141] Exemplarily, when the target critical point is an overvoltage critical point, controlling the protection device to perform a power supply protection operation corresponding to the target critical point may include:

[0142] Obtain the rated voltage of the intelligent power supply;

[0143] Determine the voltage withstand value of the intelligent power supply according to the rated voltage;

[0144] According to the first voltage curve and the overvoltage critical point, determine the overvoltage duration period, and use the voltage curve corresponding to the overvoltage duration period as the third voltage curve;

[0145] If there is a voltage greater than the voltage withstand value in the third voltage curve, control the protection device to cut off the output of the intelligent power supply at the time corresponding to the overvoltage critical point;

[0146] If the voltages in the third voltage curve are all less than or equal to the voltage withstand value, determine the voltage reduction regulation amount according to the third voltage curve and the overvoltage protection threshold corresponding to the overvoltage critical point;

[0147] Determine the voltage reduction regulation time according to the voltage reduction regulation amount;

[0148] Control the protection device to reduce the voltage of the intelligent power supply at the voltage reduction regulation 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.

[0149] It should be noted that the intelligent power supply has a rated voltage and a withstand voltage value set at the factory. Among them, 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 intelligent power supply, the internal components of the intelligent power supply will be damaged.

[0150] Specifically, the controller first obtains the rated voltage of the intelligent power supply. According to the rated voltage, the withstand voltage value of the intelligent power supply can be determined. 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 until the voltage drops again to be equal to the overvoltage protection threshold. The voltage curve corresponding to the overvoltage duration period is used as the third voltage curve. As Figure 6 shown, Ti to t8 are the overvoltage duration periods, and the voltage curve from Ti to t8 is the third voltage curve.

[0151] If there is a voltage greater than the withstand voltage value in the third voltage curve, it means that the voltage increase of the intelligent power supply during the overvoltage duration period is relatively large, and the intelligent power supply has a risk of damage. The controller will control the protection device to cut off the output of the intelligent power supply at the moment corresponding to the overvoltage critical point, so that the intelligent power supply is powered off and reset to protect the safety of the intelligent power supply.

[0152] 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. 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 step-down regulation amount according to this difference. Determine the step-down duration according to the step-down regulation amount, and determine the step-down regulation moment according to the step-down duration and the overvoltage critical point. Then, the controller controls the protection device to step down the intelligent power supply at the step-down regulation 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.

[0153] 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 perform the operation of cutting off the output of the intelligent power supply or stepping down the intelligent power supply, thereby protecting the intelligent power supply and improving the safety of the intelligent power supply.

[0154] Exemplarily, when the target critical point is the undervoltage critical point, controlling the protection device to perform the power supply protection operation corresponding to the target critical point may include:

[0155] 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;

[0156] Determine the lowest voltage in the fourth voltage curve;

[0157] Obtain the first load power corresponding to the undervoltage critical point from the load power curve;

[0158] Determine the minimum input voltage of the load device according to the first load power;

[0159] Determine the minimum undervoltage protection threshold of the intelligent power supply according to the minimum input voltage;

[0160] If the lowest voltage is greater than or equal to the minimum undervoltage protection threshold, then determine the boost regulation amount according to the undervoltage protection threshold corresponding to the undervoltage critical point and the lowest voltage, and control the protection device to boost the intelligent power supply according to the boost regulation 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;

[0161] If the lowest voltage is less than the minimum undervoltage protection threshold, then determine the non-critical devices in the load device;

[0162] Control the protection device to cut off the power supply of the intelligent power supply to the non-critical devices at the moment corresponding to the undervoltage critical point.

[0163] In the embodiment of the present application, the voltage input by the load device during operation needs to reach the minimum input voltage for the load device to work properly. Otherwise, there is voltage in the circuit but the load device does not work, and the current in the line will flow back and damage the intelligent power supply. Therefore, it is necessary to ensure that the voltage output by the intelligent power supply is greater than or equal to the minimum input voltage of the load device.

[0164] Specifically, the controller first determines the undervoltage duration 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 is used as the fourth voltage curve. The controller will determine the lowest voltage in the fourth voltage curve.

[0165] Then, the controller obtains the first load power corresponding to the undervoltage critical point from the load power curve. Determine the minimum input voltage of the load device according to the first load power, and determine the minimum undervoltage protection threshold of the intelligent power supply according to the minimum input voltage. 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.

[0166] 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. The controller can determine the boost regulation 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 regulation amount, and determine the boost regulation moment according to the boost duration. Then, control the protection device to boost the intelligent power supply at the boost regulation 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.

[0167] If the lowest voltage of the fourth voltage curve is less than the minimum undervoltage protection threshold, it indicates that during the undervoltage duration period, the voltage drop is relatively large, and it is difficult for the intelligent power supply to supply power to all load devices. Therefore, the controller will determine the device with the lowest critical level among the load devices as the non-critical device, and the critical level of the load devices is preset 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 moment corresponding to the undervoltage critical point.

[0168] Thus, 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, so as to control the protection device to boost the intelligent power supply, or cut off the power supply to the non-critical device, and then perform a power protection operation on the undervoltage anomaly in the future time period in a timely manner, improving the safety of the intelligent power supply.

[0169] 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:

[0170] 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;

[0171] Determine the current reduction regulation amount according to the second current curve;

[0172] Determine the duty cycle of the intelligent power supply during the overcurrent duration period;

[0173] Determine the target duty cycle according to the second current curve and the duty cycle;

[0174] Determine the current reduction regulation duration according to the current reduction regulation amount and the target duty cycle;

[0175] Determine the current reduction regulation moment according to the current reduction regulation duration;

[0176] Control the protection device to adjust the duty cycle of the intelligent power supply to the target duty cycle at the current reduction regulation 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.

[0177] In the embodiments of the present application, the duty cycle represents the ratio of the duration of the high level to the cycle duration within a signal cycle. The current of the intelligent power supply can be adjusted by adjusting the duty cycle.

[0178] 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, determine the maximum current in the second current curve, determine the difference between the maximum current and the overcurrent protection threshold corresponding to the second critical point, and determine the current reduction regulation amount according to the difference.

[0179] Then, the controller determines the duty cycle of the intelligent power supply during the overcurrent duration period. According to the difference between the maximum current of the second current curve and the overcurrent protection threshold corresponding to the second critical point, the duty cycle regulation amount is determined. The sum of the duty cycle regulation amount and the duty cycle is used as the target duty cycle.

[0180] Furthermore, the controller determines the current reduction regulation duration according to the current reduction regulation amount and the target duty cycle, where the mapping relationship among the current reduction regulation amount, the target duty cycle, and the current reduction regulation duration can be preset according to the actual test results. According to the current reduction regulation duration and the second critical point, the current reduction regulation 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 current reduction regulation moment, so as to reduce the current of the intelligent power supply, and make the current at the moment corresponding to the second critical point decrease to be less than or equal to the overcurrent protection threshold at this moment.

[0181] Thus, when an overcurrent anomaly is about to occur at the target critical point, the controller can control the protection device to adjust the duty cycle of the intelligent power supply to the target duty cycle at the current reduction regulation moment by determining the target duty cycle and the current reduction regulation duration, thereby protecting the intelligent power supply and improving the safety of the intelligent power supply.

[0182] Exemplarily, when the target critical point is the fourth critical point, controlling the protection device to perform the power supply protection operation corresponding to the target critical point may include:

[0183] Determine the anomaly duration period according to the first ratio curve and the fourth critical point;

[0184] Obtain the fifth voltage curve corresponding to the anomaly duration period from the first voltage curve; obtain the third current curve corresponding to the anomaly duration period from the first current curve; obtain the target load power curve corresponding to the anomaly duration period from the load power curve;

[0185] Determine the reference voltage curve and the reference current curve according to the target load power curve;

[0186] Determine the anomaly type according to the fifth voltage curve, the third current curve, the reference voltage curve, and the reference current curve;

[0187] If the anomaly type is a voltage mutation anomaly, determine the voltage regulation ratio according to the fifth voltage curve and the reference voltage curve;

[0188] Control the protection device to regulate the voltage of the intelligent power supply at the moment corresponding to the fourth critical point according to the voltage regulation ratio;

[0189] If the anomaly type is a current mutation anomaly, determine the current regulation ratio according to the third current curve and the reference current curve;

[0190] According to the steady current ratio, control the protection device to perform steady current on the intelligent power supply at the moment corresponding to the fourth critical point.

[0191] In the embodiment of the present application, the controller needs to determine the abnormal type of the target critical point, so as to control the protection device to perform voltage stabilization or steady current operation according to the abnormal type.

[0192] Specifically, the controller first determines the abnormal duration according to the first ratio curve and the fourth critical point, that is, the time period during which the ratio continuously does not fall within the preset ratio range starting from the fourth critical point. Obtain the fifth voltage curve corresponding to the abnormal duration from the first voltage curve, obtain the third current curve corresponding to the abnormal duration from the first current curve, and obtain the target load power curve corresponding to the abnormal duration from the load power curve.

[0193] Then, according to the target load power at each moment on the target load power curve, determine the reference voltage corresponding to each moment and the reference current corresponding to each moment, determine the reference voltage curve according to the reference voltage corresponding to each moment, and determine the reference current curve according to the reference current corresponding to each moment.

[0194] Furthermore, the controller determines whether the abnormal type is a voltage mutation abnormality according to 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 within the preset voltage difference range, it is determined that the abnormal type is a voltage mutation abnormality. If all voltage differences in the voltage difference curve fall within the preset voltage difference range, it is determined that the abnormal 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 within the preset voltage difference range, it is determined that the abnormal type is a current mutation abnormality.

[0195] If the abnormal type is a voltage mutation abnormality, the controller determines the voltage stabilization ratio according to the fifth voltage curve and the reference voltage curve, and controls the protection device to perform voltage stabilization on the intelligent power supply at the moment corresponding to the fourth critical point according to the voltage stabilization ratio, so as to stabilize the voltage at the moment corresponding to the fourth critical point at the reference voltage corresponding to that moment.

[0196] If the abnormal type is a current mutation abnormality, determine the steady current ratio according to the third current curve and the reference current curve, and control the protection device to perform steady current on the intelligent power supply at the moment corresponding to the fourth critical point according to the steady current ratio, so as to stabilize the current at the moment corresponding to the fourth critical point at the reference current corresponding to that moment.

[0197] 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.

[0198] 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.

[0199] 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.

[0200] 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;

[0201] A processing unit 702, configured to perform curve fitting on i historical voltages to obtain a historical voltage curve;

[0202] perform curve fitting on j historical currents to obtain a historical current curve;

[0203] determine a first voltage curve of the intelligent power supply in a future time period according to the historical voltage curve;

[0204] determine a first current curve of the intelligent power supply in a future time period according to the historical current curve;

[0205] determine a load power curve of the load device in a future time period according to a preset power consumption requirement;

[0206] 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;

[0207] determine an overcurrent protection threshold curve of the intelligent power supply in a future time period according to the load power curve;

[0208] 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 earliest moment when an abnormality occurs in the first voltage curve and the first current curve;

[0209] A control unit 703, configured to control a protection device to perform a power protection operation corresponding to the target critical point.

[0210] In a possible embodiment, in terms of 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 configured to:

[0211] 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 corresponding to the earliest moment 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 corresponding to the earliest moment when the voltage in the first voltage curve is greater than or equal to the overvoltage protection threshold corresponding to the voltage; the undervoltage critical point is used to represent the point corresponding to the earliest moment when the voltage in the first voltage curve is less than or equal to the undervoltage protection threshold corresponding to the voltage;

[0212] 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 corresponding to the earliest moment when the current in the first current curve is greater than or equal to the overcurrent protection threshold corresponding to the current;

[0213] determine the critical point corresponding to the earliest moment among the first critical point and the second critical point as a third critical point;

[0214] Obtain the voltage curve before the moment corresponding to the third critical point in the first voltage curve to obtain a second voltage curve; obtain the current curve before the moment corresponding to the third critical point in the first current curve to obtain a second current curve;

[0215] 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;

[0216] Determine a fourth critical point according to the first ratio curve; the fourth critical point is used to represent the point corresponding to the smallest moment when the ratio in the ratio curve does not fall within the preset ratio range;

[0217] Determine the point with the smallest corresponding moment among the third critical point and the fourth critical point as the target critical point.

[0218] In a possible embodiment, in terms of 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:

[0219] Divide the overvoltage protection threshold curve into m overvoltage protection threshold line segments; m is a positive integer;

[0220] Use the line segment among the m overvoltage protection threshold line segments whose starting moment is the same as the starting moment of the future time period as the first overvoltage protection threshold line segment;

[0221] Determine the first overvoltage protection threshold corresponding to the first overvoltage protection threshold line segment, and determine the first starting moment corresponding to the first overvoltage protection threshold line segment, and obtain the first voltage corresponding to the first starting moment in the first voltage curve;

[0222] If the first voltage is greater than the first overvoltage protection threshold, determine the point corresponding to the first starting moment in the first voltage curve as the overvoltage critical point;

[0223] If the first voltage is less than or equal to the first overvoltage protection threshold, determine n intersection points of the first voltage curve and the first overvoltage protection threshold line segment; n is a natural number;

[0224] Determine n slopes corresponding to the n intersection points in the first voltage curve; each intersection point corresponds to a slope;

[0225] If there is a slope greater than zero among the n slopes, determine the intersection point with the slope greater than zero and the smallest corresponding moment among the n intersection points as the overvoltage critical point;

[0226] If there is no slope greater than zero among the n slopes, determine a second overvoltage protection threshold line segment from the m overvoltage protection threshold line segments; the second starting moment corresponding to the second overvoltage protection threshold line segment is the same as the cut-off moment corresponding to the first overvoltage protection threshold line segment;

[0227] Use the second overvoltage protection threshold line segment as the first overvoltage protection threshold line segment until the overvoltage critical point is determined;

[0228] Determine the undervoltage critical point according to the first voltage curve and the undervoltage protection threshold curve;

[0229] Determine the point with the earliest corresponding time among the overvoltage critical point and the undervoltage critical point as the first critical point.

[0230] In a possible embodiment, when the target critical point is the overvoltage critical point, in terms of controlling the protection device to perform the power protection operation corresponding to the target critical point, the control unit 703 is specifically configured to:

[0231] Obtain the rated voltage of the intelligent power supply;

[0232] Determine the withstand voltage value of the intelligent power supply according to the rated voltage;

[0233] 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;

[0234] If there is a voltage greater than the withstand voltage value in the third voltage curve, control the protection device to cut off the output of the intelligent power supply at the moment corresponding to the overvoltage critical point;

[0235] If the voltages in the third voltage curve are all less than or equal to the withstand voltage value, determine the step-down regulation amount according to the third voltage curve and the overvoltage protection threshold corresponding to the overvoltage critical point;

[0236] Determine the step-down regulation moment according to the step-down regulation amount;

[0237] Control the protection device to step down the intelligent power supply at the step-down regulation 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.

[0238] In a possible embodiment, when the target critical point is the undervoltage critical point, in terms of controlling the protection device to perform the power protection operation corresponding to the target critical point, the control unit 703 is specifically configured to:

[0239] 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;

[0240] Determine the lowest voltage in the fourth voltage curve;

[0241] Obtain the first load power corresponding to the undervoltage critical point from the load power curve;

[0242] Determine the minimum input voltage of the load device according to the first load power;

[0243] Determine the minimum undervoltage protection threshold of the intelligent power supply according to the minimum input voltage;

[0244] If the lowest voltage is greater than or equal to the minimum undervoltage protection threshold, determine the boost regulation amount according to the undervoltage protection threshold corresponding to the undervoltage critical point and the lowest voltage, and control the protection device to boost the intelligent power supply according to the boost regulation 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;

[0245] If the lowest voltage is less than the minimum undervoltage protection threshold, determine the non-critical devices in the load device;

[0246] Control the protection device to cut off the power supply of the intelligent power supply to the non-critical devices at the moment corresponding to the undervoltage critical point.

[0247] In a possible embodiment, when the target critical point is the second critical point, in terms of controlling the protection device to perform the power protection operation corresponding to the target critical point, the control unit 703 is specifically configured to:

[0248] Determine the overcurrent duration according to the first current curve and the second critical point, and use the current curve corresponding to the overcurrent duration as the second current curve;

[0249] Determine the current reduction regulation amount according to the second current curve;

[0250] Determine the duty cycle of the intelligent power supply during the overcurrent duration;

[0251] Determine the target duty cycle according to the second current curve and the duty cycle;

[0252] Determine the current reduction regulation duration according to the current reduction regulation amount and the target duty cycle;

[0253] Determine the current reduction regulation moment according to the current reduction regulation duration;

[0254] Control the protection device to adjust the duty cycle of the intelligent power supply to the target duty cycle at the current reduction regulation 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.

[0255] In a possible embodiment, when the target critical point is the fourth critical point, in terms of controlling the protection device to perform the power protection operation corresponding to the target critical point, the control unit 703 is specifically configured to:

[0256] Determine the abnormal duration according to the first ratio curve and the fourth critical point;

[0257] Obtain a fifth voltage curve corresponding to the abnormal duration period from the first voltage curve; obtain a third current curve corresponding to the abnormal duration period from the first current curve; obtain a target load power curve corresponding to the abnormal duration period from the load power curve;

[0258] Determine a reference voltage curve and a reference current curve according to the target load power curve;

[0259] Determine the abnormal type according to the fifth voltage curve, the third current curve, the reference voltage curve and the reference current curve;

[0260] If the abnormal type is a voltage mutation abnormality, determine the voltage regulation ratio according to the fifth voltage curve and the reference voltage curve;

[0261] Control the protection device to stabilize the intelligent power supply at the moment corresponding to the fourth critical point according to the voltage regulation ratio;

[0262] If the abnormal type is a current mutation abnormality, determine the current regulation ratio according to the third current curve and the reference current curve;

[0263] Control the protection device to stabilize the current of the intelligent power supply at the moment corresponding to the fourth critical point according to the current regulation ratio.

[0264] In a possible embodiment, in terms of determining the first voltage curve of the intelligent power supply in the future time period according to the historical voltage curve, the processing unit 702 is specifically configured to:

[0265] Obtain c historical voltages corresponding to c moments from the historical voltage curve; each moment corresponds to a historical voltage;

[0266] Determine the autocorrelation function and the partial autocorrelation function according to the c historical voltages;

[0267] Determine the model order according to the autocorrelation function and the partial autocorrelation function;

[0268] Determine the first voltage curve prediction model according to the model order;

[0269] Estimate the parameters of the first voltage curve prediction model according to the c historical voltages to obtain the model parameters;

[0270] Determine the second voltage curve prediction model according to the first voltage curve prediction model and the model parameters;

[0271] Verify the second voltage curve prediction model according to the historical voltage curve to obtain the fitting degree;

[0272] Determine the target voltage curve prediction model according to the second voltage curve prediction model and the fitting degree;

[0273] Input the data in the historical voltage curve into the target voltage curve prediction model to obtain the first voltage curve.

[0274] An embodiment of the present application further provides an intelligent power supply, which is used to supply power to 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 described in the above method embodiments.

[0275] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program, and 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.

[0276] An embodiment of the present application further 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 described in the above method embodiments.

[0277] It should be noted that for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present application is not limited by the described action sequence, because according to the present application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to the present application.

[0278] In the above embodiments, the descriptions of the various embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0279] In several embodiments provided by 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 merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, 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 displayed or discussed mutual coupling or direct coupling or communication connection can be through some interfaces, and the indirect coupling or communication connection of the device or unit can be in an electrical or other form.

[0280] The unit described as a separation component may or may not be physically separated. The component shown as a unit may or may not be a physical unit, that is, it may be located in one place or distributed over multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0281] In addition, each functional unit in various embodiments of the present application may be integrated in a processing unit, may exist separately as individual physical units, or two or more units may be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software program modules.

[0282] If the above-mentioned 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 such an understanding, the technical solution of the present application, in essence, 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. This computer software product is stored in a memory and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present application. The aforementioned memory includes: USB flash drives, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), mobile hard disks, magnetic disks, or optical discs and other media that can store program codes.

[0283] Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing relevant hardware through a program. This program can be stored in a computer-readable memory. The memory can include: flash drives, read-only memories (abbreviation: ROM), random access memories (abbreviation: RAM), magnetic disks, or optical discs, etc.

[0284] The above has introduced the embodiments of the present application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to 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; 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, specifically includes: determining 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 a 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 a 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 a 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; Determine the point at which the corresponding time of the third critical point and the fourth critical point is the minimum as the target critical point; the target critical point is used to represent the point corresponding to the minimum time at which 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 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.

3. The method according to claim 1 or 2, 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.

4. The method according to claim 1 or 2, 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.

5. The method according to claim 1 or 2, 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.

6. The method according to claim 1 or 2, 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.

7. The method according to claim 1 or 2, 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.

8. 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 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, specifically used to: determine the 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; Determine the point at which the corresponding time of the third critical point and the fourth critical point is the minimum as the target critical point; the target critical point is used to represent the point corresponding to the minimum time at which 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.

9. 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 computer programs, and the processor is used to execute the computer programs stored in the memory, so that the intelligent power supply executes the method described in any one of claims 1-7.

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