Power supply quality monitoring method and device and storage medium

Abstract

The application provides a power supply quality monitoring method and device and a storage medium, relates to the technical field of monitoring, and is applied to a power supply system. The power supply system comprises a rectification module. The method comprises the following steps: obtaining a target corresponding relationship; the target corresponding relationship is a corresponding relationship between a change value of an alternating voltage and a change value of an output current of the rectification module in the power supply system; obtaining predicted alternating voltages of the power supply system under at least one kind of working condition according to detected operation information of the power supply system, the output current of the rectification module under the at least one kind of working condition and the target corresponding relationship; the operation information comprises an alternating voltage, an alternating current, a load voltage, a load current and a battery current; and issuing an alarm information in the case that at least one predicted alternating voltage does not belong to a preset range. In this way, power supply abnormalities that may occur in the power supply system are warned in advance, and operation and maintenance personnel can process in advance, so that user loss can be reduced.

Description

Technical Field

[0001] This application relates to the field of power supply technology, and in particular to power supply quality monitoring methods, devices, and storage media. Background Technology

[0002] With the gradual development of information and communication services, communication power supplies have been widely used. Communication power supplies are used to convert AC mains power into DC output via power modules, and together with batteries, to power communication-related loads.

[0003] Currently, when the mains power fails, the battery discharges. When the mains power is restored or the load current suddenly increases, if the power demand increases too much, the mains power supply may fail to start due to insufficient capacity or excessive line loss, which may cause losses to the user. Summary of the Invention

[0004] This application provides a power quality monitoring method, device, and storage medium to monitor the power quality in a communication power system, provide early warnings of possible power supply anomalies, improve system reliability, and reduce user losses.

[0005] Firstly, this application provides a power quality monitoring method applied to a power supply system. The power supply system includes a rectifier module. The method includes: acquiring a target correspondence; the target correspondence is the correspondence between the change in AC voltage in the power supply system and the change in the output current of the rectifier module; acquiring a predicted AC voltage of the power supply system under at least one operating condition based on the detected operating information of the power supply system, the output current of the rectifier module under at least one operating condition, and the target correspondence; the operating information includes AC voltage, AC current, load voltage, load current, and battery current; and issuing an alarm message when at least one predicted AC voltage is outside a preset range. This provides early warning of potential power supply anomalies in the power supply system, allowing maintenance personnel to address them in advance, thereby improving the reliability of the power supply system and reducing user losses.

[0006] In a possible implementation, the method further includes: detecting the operating information of the power system; obtaining the output current of the rectifier module under at least one operating condition; obtaining the change value of the output current of the at least one rectifier module based on the battery current and the output current of the rectifier module in the detected operating information of the power system; and obtaining the predicted AC voltage of the power system under at least one operating condition based on the detected operating information of the power system, the output current of the rectifier module under at least one operating condition, and a target correspondence, including: obtaining the change value of the AC voltage corresponding to the change value of the output current of the at least one rectifier module based on the target correspondence; and obtaining the predicted AC voltage of the power system under at least one operating condition based on the AC voltage in the detected operating information of the power system and the change value of the AC voltage.

[0007] In possible implementations, at least one operating condition includes: a first operating condition, a second operating condition, or a third operating condition; in the first operating condition, the output current of the rectifier module is the sum of the charging current and the load current from the detected operating information of the power system; in the second operating condition, the output current of the rectifier module is the sum of the load current and the charging current at maximum load of the power system from pre-stored historical data; in the third operating condition, the output current of the rectifier module is the sum of the load current and the charging current after a preset time period obtained according to the load current change function; the load current change function is obtained by analyzing historical data. In this way, the three operating conditions correspond to three different scenarios, making the predicted AC voltage more accurate.

[0008] In a possible implementation, the method further includes: acquiring first collected data; the first collected data is collected data acquired at a first moment; the collected data includes AC voltage, AC current, load voltage, and load current; acquiring change values ​​based on the first collected data and stored second collected data; the second collected data is collected data acquired at a second moment; storing historical data when the change value is greater than a first threshold; the historical data includes the first collected data, change values, and alarm information.

[0009] In a possible implementation, the method further includes: acquiring first operating information of the power system; the first operating information is the operating information of the power system at a third moment; reducing the output current of the rectifier module in the power system; acquiring second operating information of the power system; the second operating information is the operating information of the power system at a fourth moment; the fourth moment is later than the third moment; acquiring the target correspondence includes: if the AC voltage is within a preset range in the second operating information, acquiring the target correspondence based on the first and second operating information. In this way, the change in AC voltage in the power system can be simulated, and the obtained target correspondence better reflects the relationship between the change in the output current of the rectifier module and the change in AC voltage.

[0010] In possible implementations, reducing the output current of the rectifier module in the power supply system includes: reducing the output voltage of the rectifier module according to a preset ratio to reduce the output current of the rectifier module in the power supply system, or... The target output voltage is obtained from the output voltages of multiple preset rectifier modules, and the output voltage of the rectifier modules is adjusted to the target output voltage in order to reduce the output current of the rectifier modules in the power supply system. The target output voltage is less than the detected output voltage of the rectifier modules.

[0011] In a possible implementation, the method further includes: performing cluster analysis on historical data including alarm information to obtain at least one ratio, and then obtaining a preset ratio from the at least one ratio. In this way, the output voltage of the rectifier module adjusted by the obtained preset ratio better highlights output voltage changes that may generate alarm information.

[0012] One possible implementation of this method includes: performing feature analysis on the times when alarm information appears in historical data to obtain the target test frequency; obtaining the target correspondence includes: obtaining the target correspondence based on the target test frequency. In this way, monitoring is initiated based on the analyzed target test frequency, reducing the power consumption of the power system while improving prediction accuracy.

[0013] In a possible implementation, the method further includes: acquiring the state parameters of the power system; the state parameters include the load rate of the power system and the number of preset alarm messages in the power system; the acquisition of the first operating information of the power system includes: acquiring the first operating information of the power system when the state parameters meet a first preset condition. Thus, acquiring the first operating information only when the first preset condition is met makes the target correspondence obtained based on the first operating information and the second operating information more accurate.

[0014] Secondly, this application provides a power quality monitoring device, comprising: an acquisition module for acquiring a target correspondence; the target correspondence being the correspondence between the change value of AC voltage in the power supply system and the change value of the output current of the rectifier module; acquiring a predicted AC voltage of the power supply system under the at least one operating condition based on the detected operating information of the power supply system, the output current of the rectifier module under at least one operating condition, and the target correspondence; the operating information including AC voltage, AC current, load voltage, load current, and battery current; and an alarm module for issuing an alarm message when at least one of the predicted AC voltages does not fall within a preset range.

[0015] Thirdly, this application provides an electronic device including a processor and a memory, the processor executing computer instructions in the memory to perform the power quality monitoring method in the first aspect or any possible implementation of the first aspect.

[0016] Fourthly, this application provides a computer-readable storage medium including computer instructions that, when executed on a computer device, cause the computer device to perform the power quality monitoring method described in the first aspect or any possible implementation thereof.

[0017] Fifthly, this application provides a chip including a processor and a memory, wherein the processor executes computer instructions in the memory to perform the power quality monitoring method in the first aspect or any possible implementation thereof.

[0018] Sixthly, this application provides a computer program product that executes the power quality monitoring method in the first aspect or any possible implementation of the first aspect when running on a device.

[0019] It should be noted that the technical effects that can be achieved by the second to sixth aspects mentioned above can be referred to the description of the beneficial effects of the corresponding first or second aspects, and will not be repeated here. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the power supply system provided in an embodiment of this application; Figure 2 This is a schematic diagram of a process for collecting historical data provided in an embodiment of this application; Figure 3 A schematic flowchart illustrating a power quality monitoring method provided in an embodiment of this application; Figure 4 A schematic flowchart illustrating another power quality monitoring method provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a power quality monitoring device provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of an electronic device to which the embodiments of this application apply; Figure 7 This is a schematic diagram of the structure of a chip provided in an embodiment of this application. Detailed Implementation

[0021] The technical solutions in the embodiments of this application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B; the word "and / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone.

[0022] In the embodiments of this application, "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0023] Currently, power supply systems monitor communication power supply for anomalies by measuring AC voltage using sampling devices or sensors. When an anomaly occurs, the power supply system issues an alarm to alert maintenance personnel. However, this method cannot pre-identify and determine communication power supply anomalies, leading to delayed alarms and potentially causing losses for users.

[0024] In view of this, this application provides a power quality monitoring method. This method collects information such as AC voltage, AC current, load current, and load voltage in the power supply system. Based on the collected information, the battery capacity information in the power supply system, historical load information of the power supply system, and peak load information of the power supply system, the AC voltage of the communication power supply is predicted. If the predicted value does not meet the operating conditions of the power supply system and the load equipment, an alarm is issued. This provides early warning of potential power supply anomalies in the power supply system, allowing maintenance personnel to address them in advance, thereby helping to reduce user losses.

[0025] like Figure 1 The diagram shown is a structural schematic of the power supply system provided in an embodiment of this application. Figure 1 The power system shown includes a rectifier module 10, a sensor 20, a monitoring device 30, and a battery 40. The rectifier module 10 is connected to AC mains power.

[0026] The rectifier module 10 is used to convert alternating current into direct current.

[0027] The power system may include multiple sensors 20, which are respectively connected to the rectifier module 10, the monitoring device 30, the battery 40, and the load device. The sensors 20 can be used to collect information such as AC voltage, AC current, load current, battery current, and load voltage.

[0028] The monitoring device 30 can acquire information collected by the sensor 20 and analyze and predict the power supply quality of the power system based on the collected information. In this embodiment, the monitoring device 30 can predict the power supply quality of the power system at future times based on the predicted AC voltage.

[0029] Battery 40 can be used as a backup power source. In the event of a power outage or a sudden increase in load current, battery 40 can discharge to provide additional power to the load device.

[0030] The monitoring device 30 can also be used to set relevant parameters of the battery 40. These parameters include: battery capacity, number of battery packs, and battery charging current limit point.

[0031] Before applying the power quality monitoring method provided in the embodiments of this application, the monitoring device 30 can collect historical data at different times. For example... Figure 2 The diagram shown is a flowchart illustrating the process of the monitoring device 30 collecting historical data in an embodiment of this application. Figure 2 The process shown includes: S201, The monitoring device acquires the first collected data. The first collected data refers to the data acquired at the first moment.

[0032] In this embodiment of the application, the collected data includes information such as AC voltage, AC current, load voltage, and load current of the power supply system.

[0033] In one possible implementation, the monitoring device acquires the data collected in the first moment through sensors.

[0034] For example, in the first data acquired by the monitoring device at the first moment, the first AC voltage is 218V; the first AC current is 6.8A; the first load voltage is 53.5V; and the first load current is 74A.

[0035] S202, The monitoring device obtains the change value based on the first collected data and the stored second collected data.

[0036] In this embodiment, the second acquired data is the latest acquired data among the stored acquired data. The second acquired data is acquired at a second time. The second time is earlier than the first time.

[0037] In one possible implementation, the monitoring device acquires the change values ​​of a first AC voltage in the first acquired data and a second AC voltage in the second acquired data. It is understood that in this possible implementation, the monitoring device may also acquire the change values ​​of AC current. This application does not limit this aspect.

[0038] For example, the second AC voltage in the second acquired data is 221V; based on the example of S201, the change value obtained by the monitoring device is 3V.

[0039] In another possible implementation, the monitoring device acquires the change values ​​of the first load voltage in the first acquired data and the second load voltage in the second acquired data. It is understood that in this possible implementation, the monitoring device may also acquire the change value of the load current. This application does not limit this aspect.

[0040] For example, the second load voltage in the second acquired data is 53V; based on the example of S201, the change value obtained by the monitoring device is 0.5V.

[0041] S203. The monitoring device determines whether the change value is greater than the first threshold. If yes, proceed to S204. If no, proceed to S205.

[0042] It is understandable that the change value can be any one of the following: change in AC current, change in AC voltage, change in load voltage, or change in load current. Different change values ​​correspond to different threshold values.

[0043] For example, assuming the first threshold is 0.1V, the monitoring device executes S204 if the change in AC voltage exceeds 0.1V, otherwise it executes S206.

[0044] S204. The monitoring device stores power data. This power data includes the first collected data, change values, and alarm information.

[0045] In this embodiment of the application, the alarm information is that the monitoring device is performing... Figure 2 The process of collecting historical data shown Figure 1 The alarm information generated by the power system is shown.

[0046] Optionally, S205, the monitoring device analyzes the stored power data at multiple times to obtain the target test frequency and the target current change rate.

[0047] In this embodiment, the target testing frequency corresponds to an optimal monitoring period. The target current change rate corresponds to a preset ratio.

[0048] In one possible implementation, the monitoring device performs cluster analysis on the power data corresponding to the alarm information to obtain at least one preset ratio, and then obtains the preset ratio from the at least one ratio. For example, the monitoring device determines one of the at least one ratios that satisfies a second preset condition as the target current change rate. The target current change rate is the preset ratio.

[0049] In one possible implementation, the monitoring device performs feature analysis on the timing of alarm information occurrences in the power data to obtain the target test frequency.

[0050] In this way, the monitoring device can calibrate a more accurate preset ratio and target test frequency based on the stored power data, thereby further improving the accuracy of alarms.

[0051] S206, The monitoring device discards the first collected data.

[0052] In this way, the monitoring device will discard the first collected data that does not meet the change value requirement, and only store the first collected data that meets the change value requirement, which can save storage space.

[0053] Understandably, when the monitoring device acquires new data in the next moment, it can obtain a new change value based on the new data and the first data, and then determine whether to store the new power data based on whether the new change value is greater than the first threshold.

[0054] The monitoring device can store power data at multiple points in time by executing steps S201 to S206. This data can then be used... Figure 1 The power supply quality monitoring method provided in the embodiments of this application is applied in the power supply system shown.

[0055] like Figure 3 The diagram shown is a flowchart illustrating a power quality monitoring method provided in an embodiment of this application. This method can be applied to... Figure 1 The monitoring device in the power system shown. Figure 3 The power quality monitoring methods shown include: S301. Obtain the status parameters of the power system. These status parameters include the current load rate of the power system and the number of preset alarm messages in the power system.

[0056] In this embodiment of the application, the load factor refers to the load capacity of the power supply system.

[0057] In one possible implementation, the monitoring device acquires the load current, the number of power modules, and the module power, and obtains the load rate of the power system based on the load current, the number of power modules, and the module power.

[0058] For example, the monitoring device obtains the rated current of the power system based on the number and power of the power modules, and then obtains the ratio of the load current to the rated current of the power system. This ratio is the current load rate of the power system. The monitoring device counts the number of preset alarm messages.

[0059] It should be noted that in this embodiment, the monitoring device may periodically execute S301 according to the target test frequency, or the monitoring device may execute S301 according to user instructions. This embodiment does not limit this.

[0060] After executing S301, the monitoring device can acquire the first operating information of the power system if the status parameters meet the first preset condition. Possible implementations are described in S302 to S303 below.

[0061] S302. Determine whether the status parameter meets the first preset condition. If yes, execute S303. If no, wait for the next execution cycle to execute S301, or execute S301 according to the user instruction.

[0062] In a possible implementation, the monitoring device determines that the status parameters meet the first preset condition when the load rate in the status parameters is greater than the second threshold and the number of preset alarm messages is zero.

[0063] S303. Obtain the first operating information of the power supply system. The first operating information refers to the operating information of the power supply system at the third moment. The operating information includes AC voltage, AC current, load voltage, load current, and battery current.

[0064] In this embodiment, current refers to current intensity, which is the net amount of charge transferred through a cross-section of a conductor per unit time. AC voltage corresponds to the output voltage of the rectifier module in the power supply system. AC current is the current corresponding to the AC voltage; load voltage is the DC voltage provided by the communication power supply equipment to the load device, and load current is the sum of the currents passing through all branches containing the load device. Battery current is the current that the battery can provide. In this embodiment, battery current includes charging current and discharging current, with the direction of the charging current opposite to the direction of the discharging current.

[0065] S304. Reduce the output current of the rectifier module in the power supply system. The output current of the rectifier module is the sum of the current supplied to the load device and the charging current.

[0066] In one possible implementation, the monitoring device lowers the output voltage of the rectifier module according to a preset ratio, thereby adjusting the output current of the rectifier module. The preset ratio can be any ratio between 30% and 80%.

[0067] For example, the preset ratio can be 50%. The monitoring device adjusts the output voltage of the rectifier module in the power supply system to 50% of the current output voltage in order to adjust the output current of the rectifier module.

[0068] In another possible implementation, the monitoring device obtains a target output voltage from a set of preset output voltages of multiple rectifier modules, and adjusts the output voltage of the rectifier modules to the target output voltage, thereby reducing the output current of the rectifier modules in the power supply system. The target output voltage is less than the detected current output voltage of the rectifier modules.

[0069] For example, suppose that the monitoring device stores multiple output voltages of the rectifier module, including 65V, 60V, 55V, 50V and 45V. If the monitoring device detects that the current output voltage of the rectifier module is 60V, then the monitoring device can arbitrarily select 55V, 50V and 45V as the target output voltage and adjust the output voltage of the rectifier module to the target output voltage.

[0070] It should be noted that the step of lowering the output voltage of the rectifier module in the power supply system can be automatically triggered by the system, or it can be triggered by the monitoring device responding to the user's input of a set value through the graphical user interface. For example, the monitoring device receives a first current value input by the user through the graphical user interface, obtains a first voltage value corresponding to the first current value, and lowers the output voltage of the rectifier module based on the first voltage value.

[0071] S305. Obtain the second operating information of the power supply system. The second operating information is the operating information of the power supply system at the fourth moment. The fourth moment is the time after the monitoring device lowers the output voltage of the rectifier module in the power supply system.

[0072] It is understood that if the AC voltage falls within a preset range in the second operating information, the target correspondence can be obtained based on the first and second operating information. Possible implementation methods are described in S306 to S307 below.

[0073] S306. Determine whether the AC voltage of the power system in the second operating information is within the preset range. If yes, execute S307; otherwise, execute S311.

[0074] For example, assuming the AC voltage in the second operating information is 226V and the preset range is 187V to 242V, then the AC voltage of the power system in the second operating information falls within the preset range.

[0075] S307. Obtain the target correspondence between the change value of AC voltage in the power supply system and the change value of output current of the rectifier module based on the first operating information and the second operating information.

[0076] In this embodiment, the output current of the rectifier module is the sum of the currents provided by the rectifier module to the battery and the load device.

[0077] It should be noted that the battery current I in the second operating information bat2 Satisfy the following formula: I bat2 =I rect1 + I bat1 - I rect2 Among them, I rect1 I represents the output current of the power module in the first operating information. bat1 For the discharge current and I in the first operating information rect2 This refers to the output current of the power supply module in the second operating information. The output current of the power supply module is equal to the sum of the output current of the rectifier module and the discharge current.

[0078] The monitoring device can obtain the output current difference ΔI of the power system based on the first operating information and the second operating information. rect Satisfy: △I rect = I rect1 - I rect2 AC voltage difference ΔU ac Satisfy △U ac = U ac2- U ac1 , among which, U ac2 For the AC voltage in the second operating information, U ac1 This refers to the AC voltage in the first operating information.

[0079] AC current difference ΔI ac Satisfy △I ac = I ac1- I ac2 , among which, I ac1 For the alternating current in the first operating information, I ac2 This refers to the alternating current in the second operating information.

[0080] From formula U ac1 =U0- I ac1 R and U ac2 =U0-I ac2 R, the equivalent impedance R of the power supply circuit is obtained, satisfying R=ΔU ac / △I ac = (U ac1 -U ac2 ) / (I ac2 -I ac1 Where U0 is a fixed input voltage. Further analysis yields the changes in the rectifier module's output current ΔI and AC voltage ΔU. ac Satisfy: △U ac = f(ΔI, η), where ΔI is the change in output current of the rectifier module, and η is the preset value under different load rates. η = I is satisfied. load * U load / P, where P is the AC input power. Where I load U is the load current. load This is the load voltage.

[0081] S308. Based on the third operating information of the power system, the output current of the rectifier module of the power system under at least one operating condition and the target correspondence, obtain the predicted AC voltage of the power system under at least one operating condition.

[0082] In this embodiment, the third operating information is the operating information of the power system at the fifth moment. The fifth moment may be the same as or different from the fourth moment, and this embodiment does not limit this.

[0083] In a possible implementation, the monitoring device detects the operating information of the power system; obtains the output current of the rectifier module under at least one operating condition; based on the battery current and the output current of the rectifier module in the detected operating information of the power system, obtains the change value of the output current of at least one rectifier module; obtains the change value of the AC voltage corresponding to the change value of the output current of the at least one rectifier module according to the target correspondence; and obtains the predicted AC voltage of the power system under at least one operating condition based on the AC voltage in the detected operating information of the power system and the change value of the AC voltage. The detected operating information of the power system may be third operating information.

[0084] It should be noted that different operating conditions may include at least one of the following: a first operating condition, a second operating condition, and a third operating condition. In the first operating condition, the power system needs to charge the battery in addition to providing current to the load. The output current of the rectifier module in the first operating condition is the sum of the charging current and the load current detected in the power system's operating information. Assuming the load current remains constant, the change in the rectifier module's output current is the battery's charging current. In the second operating condition, assuming the load current changes to the load current at the power system's maximum load in historical data, the power system needs to charge the battery in addition to providing current to the load. The output current of the rectifier module in the second operating condition is the sum of the load current at the power system's maximum load in pre-stored historical data and the charging current; therefore, the change in the rectifier module's output current is the sum of the battery's charging current and the change in the load current. In the third operating condition, assuming the load current changes to a predicted value, the power system needs to charge the battery in addition to providing current to the load. The change in the rectifier module's output current is the sum of the battery's charging current and the change in the load current.

[0085] In a possible implementation, the monitoring device acquires the first current change value of the output current of the rectifier module under the first operating condition, acquires the first AC voltage change value corresponding to the first current change value according to the target correspondence, and also acquires the AC voltage in the power supply system, and acquires the first predicted AC voltage in the power supply system under the first operating condition based on the first AC voltage change value and the acquired AC voltage.

[0086] The monitoring device obtains the second current change value of the rectifier module's output current under the second operating condition based on the detected load current, the load current of the power system at maximum load in historical data, and the charging current corresponding to the battery charging load. It then obtains the second AC voltage change value corresponding to the second current change value based on the target correspondence. Finally, it obtains the second predicted AC voltage in the power system under the second operating condition based on the second AC voltage change value and the detected AC voltage.

[0087] It should be noted that the monitoring device can acquire historical data in the following way: acquiring first collected data; the first collected data is the collected data acquired at a first moment; the collected data includes AC voltage, AC current, load voltage, and load current; acquiring a change value based on the first collected data and stored second collected data; the second collected data is the collected data acquired at a second moment; storing the historical data if the change value is greater than a first threshold; the historical data includes the first collected data, the change value, and alarm information. Possible implementation methods are referenced. Figure 2 The description of the illustrated embodiments will not be repeated.

[0088] The monitoring device detects the load current and obtains the load current change function based on historical data. It then predicts the load current after a preset time period based on the load current change function. The monitoring device obtains a third current change value based on the predicted load current, the detected load current, and the charging current corresponding to the battery charging load. The monitoring device obtains a third AC voltage change value corresponding to the third current change value based on the target correspondence. The monitoring device also obtains the AC voltage in the power system and obtains the third predicted AC voltage in the power system under the third operating condition based on the third AC voltage change value and the detected AC voltage.

[0089] For the first operating condition, in one example, the detected load current is 74A, the detected AC voltage is 218V, and the AC current is 6.8A. Under this first operating condition, assume the battery charging load corresponds to a charging current of 60A; the power module's output voltage is 53.5A, the power module's output current is 134A, and η is 0.9. Under this first operating condition, the target correspondence ΔU can be used... ac = f(ΔI, η) Calculate the corresponding AC current I ac =134*53.5 / (0.9*218*3)=12.18A, AC current change value △I ac = 12.18 - 6.8 = 5.38A.

[0090] The value of R obtained from S307 is 2.42. Therefore, the AC voltage under this operating condition is calculated to be U. ac = Uac1 - R×I ac =218 -5.38×2.42 =204.98V.

[0091] The preset operating voltage range is 187V to 242V. Therefore, the AC voltage of the power supply system under this operating condition falls within the preset range.

[0092] For the second operating condition, in one example, the load current is the historical highest current of 89A. Using the same calculation process, the current corresponding to the charging load is 60A, and the corresponding predicted AC voltage under this operating condition is 202V. The predicted AC voltage of the power system under this operating condition is within the preset range.

[0093] For the third operating condition, if the load current after a preset time period, obtained by the monitoring device based on the current change function, is less than the historical maximum load current, the monitoring device does not need to obtain the third AC voltage. Otherwise, the monitoring device obtains the predicted AC voltage of the power system under the third operating condition based on the historical maximum load current, the AC voltage of the power system, and the target correspondence.

[0094] In one example, the load current is 168A after a preset time period. Using the same calculation process, the current corresponding to the charging load is 60A, and the predicted AC voltage under this condition is 185.84V.

[0095] S309. Determine whether the predicted AC voltage under each operating condition falls within the preset range. If yes, proceed to S310. If no, proceed to S311.

[0096] In the possible implementation, if the predicted AC voltage under each operating condition is within the preset range, then S310 is executed; if any predicted AC voltage is not within the preset range, then S311 is executed.

[0097] Assuming the preset voltage range is 187V to 242V, based on the example in S308, the predicted future voltage under the third operating condition is 185.84V, which is outside the preset range, indicating that there is an operational risk in the site's power system. Therefore, S311 is executed.

[0098] S310, Store test data. The test data includes status parameters, first operating information, second operating information, and predicted AC voltage under various operating conditions.

[0099] For example, test data includes AC voltage, AC current, load voltage, load current, historical peak load current, historical load change rate, battery capacity, historical alarm count, predicted load current (i.e., load current under various operating conditions), and the rate of change of rectifier module output current.

[0100] S311, Issue an alarm message.

[0101] In this embodiment of the application, the alarm information may be at least one of the following: audible and visual alarm, sound information, or text information.

[0102] In this embodiment, the monitoring device can predict the AC voltage based on the collected information, the battery capacity information in the power system, the historical peak load of the power system, and other information. If the AC voltage is not within the preset range, an alarm can be issued to provide early warning of possible power supply abnormalities in the communication power supply, thereby helping to reduce user losses.

[0103] Optionally, S312, analyze the stored test data to obtain the target test frequency and the target current change rate.

[0104] In this embodiment, the target testing frequency corresponds to an optimal monitoring period. The target current change rate corresponds to the aforementioned preset ratio.

[0105] Possible implementation methods are described in S305 above and will not be repeated here.

[0106] Understandably, the monitoring device can analyze the stored test data at certain intervals to update the preset ratio and / or target test frequency, which helps to improve the accuracy of power system monitoring.

[0107] In this way, the monitoring device can calibrate a more accurate preset ratio and target test frequency based on the stored test data, thereby further improving the accuracy of alarms.

[0108] In this embodiment, the monitoring device predicts the AC voltage of the power system based on the first operating information of the power system and the second operating information of the power system after reducing the output current of the rectifier module in the power system. If the predicted value does not fall within a preset range, an alarm is issued. This provides early warning of potential power supply anomalies in the power system, allowing maintenance personnel to address them in advance and thus helping to reduce user losses.

[0109] like Figure 4 The diagram shown is a flowchart illustrating another power quality monitoring method provided in this application embodiment. This method can be applied to... Figure 1 The monitoring device in the power system shown. Figure 4 The power quality monitoring methods shown include: S401. Obtain the target correspondence.

[0110] In this embodiment of the application, the target correspondence is the correspondence between the change value of AC voltage in the power supply system and the change value of output current of the rectifier module.

[0111] One possible implementation is described in S303 to S307 above, and will not be repeated here.

[0112] In another possible implementation, the monitoring device pre-stores target correspondences and retrieves the stored target correspondences.

[0113] It is understandable that, under the condition that the power supply environment in which the power system is located does not change much, the target correspondence is relatively stable.

[0114] S402. Based on the detected operating information of the power system, the output current of the rectifier module under at least one operating condition, and the target correspondence, obtain the predicted AC voltage of the power system under at least one operating condition. The operating information includes AC voltage, AC current, load voltage, load current, and battery current.

[0115] In this embodiment of the application, the operating information of the power system may be Figure 3 The third operating information in the illustrated embodiment.

[0116] The possible implementations are described in S308 and will not be repeated here.

[0117] S403. Determine whether the obtained predicted AC voltage is within the preset range. If yes, execute S404; otherwise, execute S405.

[0118] For possible implementation methods, please refer to the description in S309, which will not be repeated here.

[0119] S404. Store test data. The test data includes the detected operating information of the power system and the predicted AC voltage under various operating conditions.

[0120] Possible implementation methods are described in S310 and will not be repeated here.

[0121] S405, Issue an alarm message.

[0122] Possible implementation methods are described in S311 and will not be repeated here.

[0123] In this embodiment, the AC voltage of the power system can be predicted based on the detected operating information of the power system, the output current of the rectifier module under at least one operating condition, and the target correspondence. Based on the predicted AC voltage, the power supply quality of the power system can be warned in advance, which will encourage maintenance personnel to take preventative measures, thereby improving the reliability of the power system and reducing user losses.

[0124] It is understood that the steps of one or more of the above embodiments can be combined to obtain a new embodiment, and all of these are also within the scope of protection of this application. For example, in... Figure 4 Steps can be added before the illustrated embodiments. Figure 3 In the illustrated embodiment, S301 and S302 are executed only when the state parameters in S302 meet the first preset condition, thus obtaining a new embodiment.

[0125] Based on the power supply quality monitoring method in the above embodiments, this application also provides a power supply quality monitoring device. For example... Figure 5 The diagram shown is a structural schematic of a power quality monitoring device provided in an embodiment of this application. Figure 5 The power quality monitoring device 50 shown includes: an acquisition module 501, used to acquire a target correspondence; the target correspondence is the correspondence between the change value of AC voltage in the power system and the change value of output current of the rectifier module; based on the detected operating information of the power system, the output current of the rectifier module under at least one operating condition, and the target correspondence, to acquire the predicted AC voltage of the power system under the at least one operating condition; the operating information includes AC voltage, AC current, load voltage, load current, and battery current; and an alarm module 502, used to issue an alarm message when at least one of the predicted AC voltages does not fall within a preset range. For example, in conjunction with... Figure 4 The acquisition module 501 can be used to execute S401 to S402. The alarm module 502 can be used to execute S405.

[0126] Optionally, the power quality monitoring device 50 further includes a detection module 503, which is used to detect the operating information of the power system; the acquisition module 501 is also used to acquire the output current of the rectifier module under at least one operating condition; based on the battery current and the output current of the rectifier module in the detected operating information of the power system, the acquisition module 501 acquires the change value of the output current of at least one rectifier module; specifically, the acquisition module 501 is used to acquire the change value of the AC voltage corresponding to the change value of the output current of at least one rectifier module according to the target correspondence; and to acquire the predicted AC voltage of the power system under at least one operating condition based on the AC voltage and the change value of the AC voltage in the detected operating information of the power system.

[0127] Optionally, at least one operating condition includes: at least one of the first operating condition, the second operating condition, or the third operating condition; under the first operating condition, the output current of the rectifier module is the sum of the charging current and the load current in the detected operating information of the power system; under the second operating condition, the output current of the rectifier module is the sum of the load current and the charging current when the power system is at its maximum load in the pre-stored historical data; under the third operating condition, the output current of the rectifier module is the sum of the load current and the charging current after a preset time period obtained according to the load current change function; the load current change function is obtained by analyzing historical data.

[0128] Optionally, the acquisition module 501 is further configured to acquire first collected data; the first collected data is collected data acquired at a first moment; the collected data includes AC voltage, AC current, load voltage, and load current; acquire change values ​​based on the first collected data and stored second collected data; the second collected data is collected data acquired at a second moment; and store historical data when the change value is greater than a first threshold; the historical data includes the first collected data, change values, and alarm information. For example, in combination with... Figure 2 The acquisition module 501 can be used to execute S201 to S202 and S204.

[0129] Optionally, the acquisition module 501 is further configured to acquire first operating information of the power system; the first operating information is the operating information of the power system at a third moment; for example, in combination with Figure 3 The acquisition module 501 can be used to execute S301; the power quality monitoring device 50 also includes an adjustment module 504 for reducing the output current of the rectifier module in the power supply system; for example, in combination with Figure 3 The adjustment module 504 can be used to execute S304; the acquisition module 501 is used to acquire the second operating information of the power system; the second operating information is the operating information of the power system at the fourth moment; the fourth moment is later than the third moment; the acquisition module 501 is specifically used to acquire the target correspondence based on the first operating information and the second operating information when the AC voltage in the second operating information is within a preset range. For example, combined with... Figure 3 The acquisition module 501 can be used to execute S305 and S307.

[0130] Optionally, the adjustment module 504 is specifically used to reduce the output voltage of the rectifier module according to a preset ratio, so as to reduce the output current of the rectifier module in the power supply system, or to obtain a target output voltage from a preset plurality of rectifier module output voltages and adjust the output voltage of the rectifier module to the target output voltage to reduce the output current of the rectifier module in the power supply system, wherein the target output voltage is less than the detected output voltage of the rectifier module.

[0131] Optionally, the power quality monitoring device 50 further includes an analysis module 505, which performs cluster analysis on historical data including alarm information to obtain at least one ratio, and then obtains a preset ratio from the at least one ratio. For example, in combination with... Figure 3 The analysis module 505 can be used to execute S312. Combined with... Figure 2 Analysis module 505 can be used to execute S205.

[0132] Optionally, the analysis module 505 is also used to: perform feature analysis on the times when alarm information appears in historical data to obtain the target test frequency; the acquisition module 501 is specifically used to obtain the target correspondence based on the target test frequency. Combined with... Figure 2 Analysis module 505 can be used to execute S205.

[0133] Optionally, the acquisition module 501 is also used to acquire the status parameters of the power system; the status parameters include the load rate of the power system and the number of preset alarm messages in the power system; specifically, the acquisition module 501 is used to acquire the first operating information of the power system when the status parameters meet the first preset condition.

[0134] like Figure 6 The diagram shown is a structural schematic of an electronic device to which the technical solution provided in the embodiments of this application applies. Figure 6 The electronic device 60 shown may include at least one processor 601, a communication line 602, a memory 603, and at least one communication interface 604.

[0135] The processor 601 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits used to control the execution of the program of the present application.

[0136] The communication line 602 may include at least one path, such as a data bus and / or a control bus, for transmitting information between the aforementioned components (such as at least one processor 601, the communication line 602, the memory 603, and at least one communication interface 604).

[0137] Communication interface 604 uses any transceiver-like device for communicating with other devices or communication networks, such as wide area networks (WANs) and local area networks (LANs).

[0138] The memory 603 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or it may be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto. The memory 603 may exist independently and be connected to the processor 601 via communication line 602. The memory 603 may also be integrated with the processor 601. The memory 603 provided in the embodiments of this application typically includes non-volatile memory. The memory 603 stores computer instructions for executing the scheme of this application, and the processor 601 controls the execution of these instructions. The processor 601 executes the computer instructions stored in the memory 603 to implement the method provided in the following embodiments of this application.

[0139] The storage device 603 includes RAM and a hard disk.

[0140] Optionally, the computer instructions in the embodiments of this application may also be referred to as application code or system, and the embodiments of this application do not specifically limit them.

[0141] In a specific implementation, as one embodiment, electronic device 60 may include multiple processors, each of which may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. Here, a processor may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0142] In a specific implementation, as one embodiment, the electronic device 60 may further include an output device 605 and / or an input device 606. The output device 605 communicates with the processor 601 and can display information in various ways. For example, the output device 605 may be a liquid crystal display (LCD), a light-emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector, etc. The input device 606 communicates with the processor 601 and can receive user input in various ways. For example, the input device 606 may be a mouse, keyboard, touchscreen device, or sensing device, etc.

[0143] It should be noted that, Figure 6 The electronic device shown is merely an example and does not constitute a limitation on the electronic devices applicable to the embodiments of this application. In actual implementation, the electronic device may include more than […]. Figure 6 More or fewer devices or components as shown.

[0144] In one example Figure 1 The functions of the monitoring device 30 can be determined by Figure 6 The electronic device 60 shown is implemented.

[0145] In another example, combined Figure 5 The processing function of the aforementioned acquisition module 501 can be provided by Figure 6 The processor 601 calls the computer program in the memory 603 to implement the function. The communication function of the acquisition module 501 can be implemented by the communication interface 504. The function of the alarm module 502 can be implemented by the output device 505. The functions of the detection module 503, the adjustment module 504, and the analysis module 505 can all be implemented as shown in the figure. Figure 6 The processor 601 calls the computer program in memory 603 to implement this.

[0146] This application also provides a chip 140, such as... Figure 7 As shown, the chip 140 includes a processor 1401 and a memory 1402. The memory 1402 is used to store computer programs; the processor 1401 is used to execute any of the power quality monitoring methods described above according to the computer programs.

[0147] Based on the power quality monitoring method provided in the above embodiments, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program that executes the above-described power quality monitoring method.

[0148] This application also provides a computer program product that, when executed, can implement the above-described power quality monitoring method.

[0149] Through the above description of the embodiments, those skilled in the art will clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the terminal device or server can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the above-described apparatus and modules can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0150] In the several embodiments provided in this example, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. It is understood that the apparatus embodiments described above are merely illustrative. For example, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection between devices or modules, and may be electrical, mechanical, or other forms.

[0151] The modules described above as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0152] Furthermore, in this embodiment, the functional modules can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules can be implemented in hardware or as software functional modules.

[0153] If the integrated module is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this embodiment, 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 storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments. The aforementioned storage medium includes various media capable of storing program code, such as flash memory, portable hard disk, read-only memory, random access memory, magnetic disk, or optical disk.

[0154] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A power supply quality monitoring method, characterized in that, Applications in power supply systems; The power system includes a rectifier module and a battery, and the method includes: Obtain the target correspondence; the target correspondence is the correspondence between the change value of AC voltage in the power supply system and the change value of output current of the rectifier module; Based on the detected operating information of the power system, the output current of the rectifier module under at least one operating condition, and the target correspondence, the predicted AC voltage of the power system under the at least one operating condition is obtained; the operating information includes AC voltage, AC current, load voltage, load current, and battery current; An alarm message is issued if at least one of the predicted AC voltages is outside the preset range; The battery current is provided by the battery.

2. The power supply quality monitoring method according to claim 1, characterized in that, The method further includes: Detect the operating information of the power system; Obtain the output current of the rectifier module under at least one of the aforementioned operating conditions; Based on the battery current and the output current of the rectifier module in the detected operating information of the power system, obtain the change value of the output current of at least one rectifier module; The step of obtaining the predicted AC voltage of the power system under the at least one operating condition based on the detected operating information of the power system, the output current of the rectifier module under at least one operating condition, and the target correspondence includes: The change in AC voltage corresponding to the change in output current of at least one rectifier module is obtained according to the target correspondence; the predicted AC voltage of the power system under at least one operating condition is obtained according to the AC voltage in the detected operating information of the power system and the change in AC voltage.

3. The power supply quality monitoring method according to claim 2, characterized in that, The at least one operating condition includes at least one of the following: a first operating condition, a second operating condition, or a third operating condition; Under the first operating condition, the output current of the rectifier module is the sum of the charging current and the load current obtained from the detected operating information of the power system. The output current of the rectifier module under the second operating condition is the sum of the load current of the power system at maximum load and the charging current in the pre-stored historical data. The output current of the rectifier module under the third operating condition is the sum of the load current after a preset time period obtained according to the load current change function and the charging current; the load current change function is obtained by analyzing the historical data. The charging current is included in the battery current.

4. The power supply quality monitoring method according to claim 1, characterized in that, The method also includes collecting historical data at different times before obtaining the target correspondence; The collection of historical data at different times includes: Acquire first data; the first data is the data acquired at a first moment; the data includes AC voltage, AC current, load voltage, and load current; The change value is obtained based on the first collected data and the stored second collected data; the second collected data is the collected data acquired at the second time point; The historical data is stored when the change value is greater than a first threshold; the historical data includes the first collected data, the change value, and alarm information.

5. The power supply quality monitoring method according to claim 4, characterized in that, The method further includes: Obtain the first operating information of the power system; the first operating information is the operating information of the power system at a third time. Reduce the output current of the rectifier module in the power supply system; Acquire the second operating information of the power system; the second operating information is the operating information of the power system at a fourth time point; the fourth time point is later than the third time point; The acquisition of the target correspondence includes: If the AC voltage falls within a preset range in the second operating information, the target correspondence is obtained based on the first operating information and the second operating information.

6. The power supply quality monitoring method according to claim 5, characterized in that, The reduction of the output current of the rectifier module in the power supply system includes: The output voltage of the rectifier module is reduced according to a preset ratio to reduce the output current of the rectifier module in the power supply system, or... The target output voltage is obtained from the output voltages of a plurality of preset rectifier modules, and the output voltage of the rectifier module is adjusted to the target output voltage to reduce the output current of the rectifier module in the power supply system. The target output voltage is less than the detected output voltage of the rectifier module.

7. The power supply quality monitoring method according to claim 6, characterized in that, The method further includes: Cluster analysis is performed on the historical data, including alarm information, to obtain at least one ratio, and the preset ratio is obtained from the at least one ratio.

8. The power supply quality monitoring method according to claim 5, characterized in that, The method further includes: The frequency of target tests is obtained by performing feature analysis on the times when alarm information appears in the historical data; The status parameters of the power system are obtained based on the target test frequency; the status parameters include the load rate of the power system and the number of preset alarm messages in the power system. The acquisition of the first operating information of the power system includes: The first operating information of the power system is obtained when the state parameters meet the first preset conditions.

9. A power supply quality monitoring device, characterized in that, Applications in power supply systems; The power system includes a rectifier module and a battery, and the device includes: An acquisition module is used to acquire a target correspondence relationship; the target correspondence relationship is the correspondence between the change value of AC voltage in the power supply system and the change value of output current of the rectifier module; based on the detected operating information of the power supply system, the output current of the rectifier module under at least one operating condition, and the target correspondence relationship, the predicted AC voltage of the power supply system under the at least one operating condition is acquired; the operating information includes AC voltage, AC current, load voltage, load current, and battery current; wherein, the battery current is provided by the battery; An alarm module is used to issue an alarm message when at least one of the predicted AC voltages is outside a preset range.

10. An electronic device, characterized in that, It includes a memory and a processor; the processor executes computer instructions in the memory to perform the power quality monitoring method as described in any one of claims 1-8.

11. A computer-readable storage medium, characterized in that, Includes computer instructions that, when executed on a computer device, cause the computer device to perform the power quality monitoring method as described in any one of claims 1-8.

12. A chip, characterized in that, The chip includes at least one processor and a memory, wherein the processor executes computer instructions in the memory to perform the power quality monitoring method as described in any one of claims 1-8.

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