Evaluation method, device, computer equipment and storage medium for backup power supply system

Abstract

The present application relates to an evaluation method, device, computer equipment and storage medium for a backup power supply system. The method comprises: controlling the power supply point to operate under different voltage sag events, obtaining the voltage of the receiving point under different voltage sag events, and then determining multiple sets of isolation point data according to the voltage of the receiving point under different voltage sag events, and finally determining the voltage sag isolation performance of the backup power supply system according to the multiple sets of isolation point data. The use of this method can comprehensively evaluate the voltage sag isolation effect of the backup power supply system as a whole, so that the evaluation index of the voltage sag isolation effect of the backup power supply system can be applied to all types of sensitive equipment, thereby reducing the loss of manpower and material resources caused by the need to conduct corresponding governance effect evaluations for different sensitive equipment in the backup power supply system.

Description

Technical Field

[0001] The present application relates to the field of electric power technology, and in particular to an evaluation method, device, computer equipment and storage medium for a backup power supply system. Background Art

[0002] With the development of power technology, the economic losses caused by power quality problems such as voltage sag are becoming more and more prominent. In order to solve the problem of voltage sag, the existing voltage sag control method is: on the basis of the original low-voltage AC power supply system, a backup low-voltage DC power supply system is superimposed. The backup low-voltage DC power supply system is usually in hot standby state. When a voltage sag occurs on the power supply side, the power supply of the system end load is switched from the low-voltage AC power supply system to the backup low-voltage DC power supply system, thereby achieving voltage sag control.

[0003] In order to evaluate the effect of voltage sag control in the backup low-voltage DC power supply system, the traditional technology makes a qualitative judgment on whether the control is successful by evaluating the severity of the voltage sag or the tolerance of the load equipment to the voltage sag.

[0004] However, the backup low-voltage DC power distribution system is designed for many types of sensitive equipment (equipment that is disturbed in the power supply system, such as load equipment). Each sensitive equipment has a different tolerance curve characteristic for voltage sag faults. The same backup low-voltage DC power distribution system needs to conduct corresponding governance effect evaluations for different sensitive equipment, resulting in a large loss of manpower and material resources. Summary of the invention

[0005] Based on this, it is necessary to provide an evaluation method, device, computer equipment and storage medium for a backup power supply system that can be applicable to all types of sensitive equipment, thereby reducing the loss of manpower and material resources generated when evaluating the effect of voltage sag control, in response to the above technical problems.

[0006] A method for evaluating a backup power supply system, wherein the backup power supply system is used to supply power to a receiving point when a voltage sag fault occurs at a power supply point, the method comprising:

[0007] Control the power supply point to operate under different voltage sag events, and obtain the voltage of the receiving point under different voltage sag events; the voltage sag event includes the voltage sag depth and voltage sag duration;

[0008] Determine multiple groups of isolation point data according to the voltage of the power receiving point under different voltage sag events; the isolation point data includes the critical sag depth of the power supply point and / or the critical duration of the power supply point;

[0009] The voltage sag isolation performance of the backup power supply system is determined based on multiple groups of isolation point data.

[0010] In one of the embodiments, multiple groups of isolation point data are determined based on the voltage of the power receiving point under different voltage sag events, including: controlling the power supply point to operate under the voltage sag event, and obtaining the voltage of the power receiving point under the voltage sag event; if the voltage of the power receiving point exceeds a preset voltage threshold, adjusting the voltage sag depth and / or voltage sag duration in the voltage sag event, and controlling the power supply point to operate under the adjusted voltage sag event; if the voltage of the power receiving point is less than the preset voltage threshold, obtaining the voltage sag depth and voltage sag duration in the current voltage sag event as the isolation point data.

[0011] In one embodiment, adjusting the voltage sag depth or the voltage sag duration in the voltage sag event includes: controlling the voltage sag depth to remain unchanged and increasing the voltage sag duration.

[0012] In one embodiment, adjusting the voltage sag depth or voltage sag duration in a voltage sag event includes: controlling the voltage sag duration to remain unchanged and increasing the voltage sag depth.

[0013] In one of the embodiments, the voltage sag isolation performance of the backup power supply system is determined based on multiple sets of isolation point data, including: determining the correlation between the critical duration and the critical sag depth based on the multiple sets of isolation point data; and determining the voltage sag isolation performance of the backup power supply system based on the correlation.

[0014] In one of the embodiments, determining the voltage sag isolation performance of the backup power supply system based on the association relationship includes: determining a voltage sag isolation curve based on the association relationship; and determining the voltage sag isolation performance of the backup power supply system according to the closed area between the voltage sag isolation curve and the coordinate axis.

[0015] In one of the embodiments, the voltage sag isolation performance of the backup power supply system is determined based on the closed area between the voltage sag isolation curve and the coordinate axis, including: determining the strength of the voltage sag isolation performance of the backup power supply system based on the size of the closed area, the larger the closed area, the stronger the voltage sag isolation performance of the backup power supply system.

[0016] An evaluation device for a backup power supply system, the device comprising:

[0017] A control module is used to control the operation of the power supply point under different voltage sag events and obtain the voltage of the receiving point under different voltage sag events; the voltage sag event includes the voltage sag depth and the voltage sag duration;

[0018] A first determination module is used to determine multiple groups of isolation point data according to the voltage of the power receiving point under different voltage sag events; the isolation point data includes a critical sag depth of the power supply point and / or a critical duration of the power supply point;

[0019] The second determination module is used to determine the voltage sag isolation performance of the backup power supply system according to multiple groups of isolation point data.

[0020] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0021] Control the power supply point to operate under different voltage sag events, and obtain the voltage of the receiving point under different voltage sag events; the voltage sag event includes the voltage sag depth and voltage sag duration;

[0022] Determine multiple groups of isolation point data according to the voltage of the power receiving point under different voltage sag events; the isolation point data includes the critical sag depth of the power supply point and / or the critical duration of the power supply point;

[0023] The voltage sag isolation performance of the backup power supply system is determined based on multiple groups of isolation point data.

[0024] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the following steps:

[0025] Control the power supply point to operate under different voltage sag events, and obtain the voltage of the receiving point under different voltage sag events; the voltage sag event includes the voltage sag depth and voltage sag duration;

[0026] Determine multiple groups of isolation point data according to the voltage of the power receiving point under different voltage sag events; the isolation point data includes the critical sag depth of the power supply point and / or the critical duration of the power supply point;

[0027] The voltage sag isolation performance of the backup power supply system is determined based on multiple groups of isolation point data.

[0028] The evaluation method, device, computer equipment and storage medium of the above-mentioned backup power supply system, by controlling the power supply point to operate under different voltage sag events, obtains the voltage of the receiving point under different voltage sag events, and then determines multiple groups of isolation point data according to the voltage of the receiving point under different voltage sag events, and finally determines the voltage sag isolation performance of the backup power supply system according to the multiple groups of isolation point data. Among them, the above-mentioned isolation point data can be the critical point data of whether the backup power supply system can successfully isolate the voltage sag, and the size of the isolation point data can quantitatively evaluate the voltage sag isolation effect of the backup power supply system. Multiple groups of isolation point data can cover multiple types of voltage sag isolation events. Therefore, the above-mentioned method can comprehensively evaluate the voltage sag isolation effect of the backup power supply system from the whole, so that the evaluation index of the voltage sag isolation effect of the backup power supply system can be applicable to all types of sensitive equipment, thereby reducing the loss of manpower and material resources caused by the need to conduct corresponding governance effect evaluations for different sensitive equipment in the backup power supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A diagram showing an application environment of a method for evaluating a backup power supply system in one embodiment;

[0030] Figure 2 is a flow chart of a method for evaluating a backup power supply system in one embodiment;

[0031] Figure 3 is a flow chart of a method for evaluating a backup power supply system in one embodiment;

[0032] Figure 4 is a flow chart of a method for evaluating a backup power supply system in one embodiment;

[0033] Figure 5 is a flow chart of a method for evaluating a backup power supply system in one embodiment;

[0034] Figure 6 A schematic diagram of a voltage sag isolation curve in one embodiment;

[0035] Figure 7 A schematic flow chart of a method for obtaining multiple groups of isolation point data in another embodiment;

[0036] Figure 8 is a structural block diagram of an evaluation device for a backup power supply system in one embodiment;

[0037] Fig. 9 is a structural block diagram of an evaluation device for a backup power supply system in one embodiment;

[0038] Fig.10 is a structural block diagram of an evaluation device for a backup power supply system in one embodiment;

[0039] Fig.11 is a structural block diagram of an evaluation device for a backup power supply system in one embodiment;

[0040] Fig.12 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] The evaluation method of the backup power supply system provided in this application can be applied to Figure 1In the power supply system shown. Among them, the programmable power supply 102 supplies power to the simulated load 104 through the intermediate link of power supply, and the backup power supply system 106 is in a hot standby state, which is used to replace the intermediate link of power supply to supply power to the simulated load 104 when a voltage sag occurs in the power supply system. Among them, the intermediate link of power supply can be a power grid line from the power supply point D1 to the power receiving point D2. The backup power supply system 106 may include one or more voltage sag control devices, and the voltage sag control devices include but are not limited to converters and energy storage devices. Due to the buffering effect of the converter and the voltage support effect of the energy storage device, the backup power supply system 106 will have a certain impact on the propagation of the voltage sag in the power supply system. Generally, the voltage sag will be reduced after passing through the converter and the energy storage device, that is, the backup power supply system 106 will have a certain isolation effect on the voltage sag. The evaluation method of the backup power supply system provided in the present application controls the power supply point D1 to operate under different voltage sag events, obtains the voltage of the receiving point D2 under different voltage sag events, and then determines multiple groups of isolation point data based on the voltage of the receiving point D2 under different voltage sag events, and finally determines the voltage sag isolation performance of the backup power supply system based on the multiple groups of isolation point data.

[0043] In one embodiment, Figure 2 As shown, a method for evaluating a backup power supply system is provided. Figure 1 The power supply system in FIG. 1 is taken as an example to illustrate the method, which includes the following steps:

[0044] S202, controlling the power supply point to operate under different voltage sag events, and obtaining the voltage of the receiving point under different voltage sag events; the voltage sag event includes the voltage sag depth and the voltage sag duration.

[0045] The power supply point may refer to a common connection point close to the programmable power supply and not electrically isolated from the programmable power supply. The power receiving point may refer to a point close to the simulated load and not electrically isolated from the simulated load. The voltage condition at the power receiving point directly affects the operation of the simulated load. Voltage sag is a transient power quality problem, which refers to the phenomenon that the effective value of the power supply voltage suddenly drops in a short period of time and then recovers. It may refer to the duration of the drop in the effective value of the power supply voltage. In the power grid, the duration of the voltage sag phenomenon is mostly 0.5 cycles to 1.5s.

[0046] Specifically, by programming and controlling the programmable power supply, different voltage sag events can be simulated at the power supply point, and the voltage sag events will be suppressed when passing through the backup power supply system. Furthermore, by obtaining the voltage at the receiving point under different voltage sag events, the voltage sag control effect of the backup power supply system can be quantitatively reflected. Generally speaking, the closer the voltage at the receiving point is to the rated value of the power supply voltage, the better the voltage sag control effect of the backup power supply system.

[0047] S204, determining multiple groups of isolation point data according to the voltage of the power receiving point under different voltage sag events; the isolation point data includes a critical sag depth of the power supply point and / or a critical duration of the power supply point.

[0048] The isolation point data may be the critical point data of whether the backup power supply system can successfully isolate the voltage sag, and the size of the isolation point data can quantitatively evaluate the voltage sag isolation effect of the backup power supply system. The critical sag depth and critical duration may be the voltage sag depth and voltage sag duration in the most serious voltage sag event that the backup power supply system can successfully manage.

[0049] Specifically, the voltage at the power receiving point can indicate whether the backup power supply system has successfully managed the voltage sag event at the power supply point. For example, if the voltage at the power receiving point is not less than 90% of the rated voltage of the programmable power supply, it indicates that the backup power supply system has successfully managed the voltage sag event at the power supply point.

[0050] Furthermore, multiple groups of isolation point data can be determined by the voltage magnitude at the power receiving point under different voltage sag events. A group of isolation point data may include the longest voltage sag duration that the backup power supply system can successfully manage under the premise of a certain voltage sag depth, and may also include the maximum voltage sag depth that the backup power supply system can successfully manage under a certain voltage sag duration.

[0051] S206. Determine the voltage sag isolation performance of the backup power supply system according to the multiple groups of isolation point data.

[0052] Specifically, multiple groups of isolation point data are the most serious voltage sag events that can be successfully managed by the backup power supply system. The voltage sag isolation performance of the backup power supply system can be determined by the critical sag depth and / or critical duration in the isolation point data. Generally, the greater the critical sag depth in the isolation point data and the longer the critical duration, the better the voltage sag isolation performance of the backup power supply system.

[0053] In the evaluation method of the above-mentioned backup power supply system, the voltage of the receiving point under different voltage sag events is obtained by controlling the power supply point to operate under different voltage sag events, and then multiple groups of isolation point data are determined according to the voltage of the receiving point under different voltage sag events, and finally the voltage sag isolation performance of the backup power supply system is determined according to the multiple groups of isolation point data. Among them, the above-mentioned isolation point data can be the critical point data of whether the backup power supply system can successfully isolate the voltage sag, and the size of the isolation point data can quantitatively evaluate the voltage sag isolation effect of the backup power supply system. Multiple groups of isolation point data can cover various types of voltage sag isolation events. Therefore, the above-mentioned method can comprehensively evaluate the voltage sag isolation effect of the backup power supply system as a whole, so that the evaluation index of the voltage sag isolation effect of the backup power supply system can be applicable to all types of sensitive equipment, thereby reducing the loss of manpower and material resources caused by the need to conduct corresponding governance effect evaluations for different sensitive equipment in the backup power supply system.

[0054] In one embodiment, Figure 3 As shown, based on the above embodiment, multiple groups of isolation point data are determined according to the voltage of the power receiving point under different voltage sag events, including:

[0055] S302: Control the power supply point to operate under a voltage sag event, and obtain the voltage of the power receiving point under the voltage sag event.

[0056] Specifically, the process of determining the isolation point data is the process of determining the most serious voltage sag event that the backup power supply system can handle. Based on this, the programmable power supply can control the power supply point to operate under the voltage sag condition and obtain the voltage of the receiving point under the voltage sag event.

[0057] S304: If the voltage at the power receiving point exceeds a preset voltage threshold, adjust the voltage sag depth and / or voltage sag duration in the voltage sag event, and control the power supply point to operate under the adjusted voltage sag event.

[0058] The preset voltage threshold may be a critical value used to characterize whether the backup power supply system successfully manages a voltage sag event. For example, the preset voltage threshold may be 90% of the rated voltage of the programmable power supply 102. The rated voltage of the programmable power supply may be 220V or 380V, which is not limited here.

[0059] Specifically, if the voltage at the power receiving point exceeds the preset voltage threshold, it indicates that the backup power supply system 106 successfully manages the voltage sag event. At this time, the voltage sag depth and voltage sag duration in the voltage sag event are not isolation point data. Further, the voltage sag depth and / or voltage sag duration in the voltage sag event can be adjusted, and the power supply point can continue to be controlled to operate under the adjusted voltage sag event. The adjustment method can be to increase the voltage sag depth or to increase the voltage sag duration, which is not limited here.

[0060] S306: If the voltage at the power receiving point is less than the preset voltage threshold, the voltage sag depth and voltage sag duration in the current voltage sag event are obtained as isolation point data.

[0061] Specifically, the voltage sag depth and / or voltage sag duration are continuously adjusted on the basis of step S304 until the voltage at the power receiving point D2 is less than the preset voltage threshold, indicating that the backup power supply system 106 has failed to successfully manage the current voltage sag event. Further, the voltage sag depth and voltage sag duration in the current voltage sag event can be used as a set of isolation point data.

[0062] In this embodiment, the power supply point is controlled to operate under a voltage sag event, the voltage of the receiving point under the voltage sag event is obtained, and if the voltage at the receiving point exceeds a preset voltage threshold, the voltage sag depth and / or voltage sag duration in the voltage sag event is adjusted, and the power supply point is controlled to operate under the adjusted voltage sag event until the voltage at the receiving point is less than the preset voltage threshold, and the voltage sag depth and voltage sag duration in the current voltage sag event are obtained as isolation point data, thereby providing an accurate data basis for quantitatively evaluating the isolation effect of the backup power supply system against voltage sags.

[0063] In one embodiment, based on the above embodiment, adjusting the voltage sag depth or the voltage sag duration in the voltage sag event includes: controlling the voltage sag depth to remain unchanged and increasing the voltage sag duration.

[0064] Specifically, according to the severity of the voltage sag event, multiple voltage sag events occur one by one from minor to severe at the power supply point D1, thereby determining the most severe voltage sag event that the backup power supply system can handle. The voltage sag depth and voltage sag duration in the voltage sag event are a set of isolation point data.

[0065] For example, the control variable method can be used to control the change process of the voltage sag event, such as controlling the voltage sag depth to remain unchanged and continuously increasing the voltage sag duration, so that the severity of the voltage sag event is closely aggravated. The increase in the voltage sag duration can be set according to actual conditions, for example, increasing the time by 10ms each time. Generally, the smaller the increase in the voltage sag duration each time, the more accurate the isolation point data obtained.

[0066] Furthermore, the voltage sag depth may be adjusted, and based on the above-mentioned control variable method, multiple groups of isolation point data at multiple voltage sag depths may be obtained.

[0067] In this embodiment, by controlling the voltage sag depth to remain unchanged and increasing the voltage sag duration, the severity of the voltage sag event can be closely adjusted until the isolation point data is obtained, which provides an accurate data basis for quantitatively evaluating the isolation effect of the backup power supply system against the voltage sag. At the same time, the use of the above-mentioned control variable method can also improve the efficiency of obtaining isolation point data.

[0068] In one embodiment, based on the above embodiment, adjusting the voltage sag depth or voltage sag duration in a voltage sag event includes: controlling the voltage sag duration to remain unchanged and increasing the voltage sag depth.

[0069] For example, the control variable method can be used to control the change process of the voltage sag event, such as controlling the duration of the voltage sag to remain unchanged and continuously increasing the voltage sag depth, so that the severity of the voltage sag event is closely aggravated. The increase in the voltage sag depth can be set according to actual conditions, for example, the voltage sag depth is increased by 1% of the rated voltage each time. Generally, the smaller the increase in the voltage sag depth each time, the more accurate the isolation point data obtained.

[0070] Furthermore, the duration of the voltage sag may be adjusted, and based on the above-mentioned control variable method, multiple groups of isolation point data under multiple voltage sag durations may be obtained.

[0071] In this embodiment, the duration of the voltage sag is controlled to remain unchanged and the depth of the voltage sag is increased by the control variable method, so that the severity of the voltage sag event can be closely adjusted until the isolation point data is obtained, which provides an accurate data basis for quantitatively evaluating the isolation effect of the backup power supply system against the voltage sag. At the same time, the use of the above control variable method can also improve the efficiency of obtaining isolation point data.

[0072] In one embodiment, Figure 4 As shown, based on the above embodiment, the voltage sag isolation performance of the backup power supply system is determined according to multiple groups of isolation point data, including:

[0073] S402: Determine the correlation between the critical duration and the critical sag depth according to the multiple groups of isolation point data.

[0074] The correlation between the critical duration and the critical sag depth may be a functional relationship, which represents the relationship between the critical duration and the critical sag depth in the critical value of the most severe voltage sag event that can be successfully managed by the backup power supply system.

[0075] Specifically, the computer device can determine the correlation between the critical duration and the critical sag depth according to multiple groups of isolation point data in the form of a table, a relational expression or a graph.

[0076] S404. Determine the voltage sag isolation performance of the backup power supply system based on the association relationship.

[0077] Specifically, based on the correlation between the critical duration and the critical sag depth in multiple groups of isolation point data, the specific value and change of the critical duration or critical sag depth can be intuitively characterized, thereby quantifying the voltage sag isolation performance of the backup power supply system. Generally speaking, the higher the critical duration or critical sag depth, the better the isolation performance of the backup power supply system.

[0078] In this embodiment, the correlation between the critical duration and the critical sag depth is determined based on multiple sets of isolation point data, and the voltage sag isolation performance of the backup power supply system is determined based on the correlation. Since multiple sets of isolation point data can cover multiple types of voltage sag isolation events, the voltage sag isolation effect of the backup power supply system can be comprehensively evaluated based on the correlation, so that the evaluation index of the voltage sag isolation effect of the backup power supply system can be applied to all types of sensitive equipment, thereby reducing the loss of manpower and material resources caused by the need to conduct corresponding governance effect evaluations for different sensitive equipment in the backup power supply system.

[0079] In one embodiment, Figure 5 As shown, based on the above embodiment, the voltage sag isolation performance of the backup power supply system is determined based on the association relationship, including:

[0080] S502: Determine a voltage sag isolation curve based on the association relationship.

[0081] Specifically, the computer device can determine the correlation between the critical duration and the critical sag depth in a graphical manner based on multiple groups of isolation point data.

[0082] For example, Figure 6As shown, with the voltage sag duration as the horizontal coordinate and the voltage sag depth as the vertical coordinate, a voltage sag isolation curve formed by connecting multiple groups of isolation point data is determined. The physical meaning of the voltage sag isolation curve can be: any voltage sag event corresponding to a point below the voltage sag isolation curve can be successfully isolated by the backup power supply system, and any voltage sag event corresponding to a point above the voltage sag isolation curve cannot be successfully isolated by the backup power supply system.

[0083] S504. Determine the voltage sag isolation performance of the backup power supply system according to the closed area between the voltage sag isolation curve and the coordinate axis.

[0084] Specifically, the physical meaning of the closed area of ​​the voltage sag isolation curve and the coordinate axis can be: any voltage sag event corresponding to any coordinate point within the closed area can be successfully isolated by the backup power supply system. Figure 6 As shown in FIG. 1 , the voltage sag isolation performance of the backup power supply system can be determined according to the size of the enclosed area between the voltage sag isolation curve and the coordinate axis. Generally, the larger the enclosed area, the more voltage sag events the backup power supply system can handle, and the stronger its voltage sag isolation performance.

[0085] In this embodiment, the voltage sag isolation curve is determined by the correlation between the critical duration and the critical sag depth, and the voltage sag isolation performance of the backup power supply system is determined according to the closed area between the voltage sag isolation curve and the coordinate axis. The larger the closed area, the stronger the voltage sag isolation performance of the backup power supply system. Among them, the physical meaning of the voltage sag isolation curve is that any voltage sag event corresponding to any point below the voltage sag isolation curve can be successfully isolated by the backup power supply system. Based on this, the size of the closed area between the voltage sag isolation curve and the coordinate axis can comprehensively evaluate the voltage sag isolation effect of the backup power supply system as a whole, so that the evaluation index of the voltage sag isolation effect of the backup power supply system can be applied to all types of sensitive equipment, thereby reducing the loss of manpower and material resources caused by the need for the backup power supply system to conduct corresponding governance effect evaluations for different sensitive equipment.

[0086] In one embodiment, Figure 7 As shown, a method for obtaining multiple sets of isolation point data is proposed, including:

[0087] S701. Set the voltage sag depth to 10%.

[0088] Specifically, the initial voltage sag depth of the initial voltage sag event generated at the power supply point is controlled to be 10%.

[0089] S702. Set the duration of voltage sag to 10 ms.

[0090] Specifically, the initial voltage sag duration of the initial voltage sag event generated at the power supply point is controlled to be 10 ms.

[0091] S703: Obtain the voltage at the power receiving point, and determine whether a voltage sag occurs at the power receiving point.

[0092] S704: If no voltage sag occurs at the power receiving point, determine whether the current voltage sag duration is 1 minute.

[0093] S705: If the duration is not 1 minute, increase the duration by 10 ms and return to step S703.

[0094] S706: If a voltage sag occurs at the power receiving point, determine whether the voltage sag depth at the power supply point is 90%.

[0095] S707: If the voltage sag depth at the power supply point is not 90%, determine the current voltage sag depth and voltage sag duration as a set of isolation point data.

[0096] S708, increase the voltage sag depth by 1%, and return to step S702.

[0097] Specifically, according to the above steps S701 - S708 , 80 groups of isolation point data corresponding to voltage sag depths ranging from 10% to 89% may be determined.

[0098] In this embodiment, based on the above 80 groups of isolation point data, the voltage sag isolation effect of the backup power supply system can be comprehensively evaluated as a whole, so that the evaluation index of the voltage sag isolation effect of the backup power supply system can be applicable to all types of sensitive equipment, thereby reducing the loss of manpower and material resources caused by the need to conduct corresponding management effect evaluations for different sensitive equipment in the backup power supply system.

[0099] It should be understood that although Figure 2-5 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 2-5 At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0100] In one embodiment, Figure 8As shown, an evaluation device for a backup power supply system is provided, comprising: a control module 10, a first determination module 20 and a second determination module 30, wherein:

[0101] The control module 10 is used to control the power supply point to operate under different voltage sag events and obtain the voltage of the receiving point under different voltage sag events; the voltage sag event includes the voltage sag depth and the voltage sag duration;

[0102] A first determination module 20 is used to determine multiple groups of isolation point data according to the voltage of the power receiving point under different voltage sag events; the isolation point data includes a critical sag depth of the power supply point and / or a critical duration of the power supply point;

[0103] The second determination module 30 is used to determine the voltage sag isolation performance of the backup power supply system according to multiple groups of isolation point data.

[0104] In one embodiment, if Fig. 9 As shown, based on the above embodiment, the first determining module 20 includes:

[0105] A first acquisition unit 210, used to control the power supply point to operate under a voltage sag event, and to acquire the voltage of the power receiving point under the voltage sag event;

[0106] The adjustment unit 220 is used to adjust the voltage sag depth and / or voltage sag duration in the voltage sag event if the voltage at the power receiving point exceeds a preset voltage threshold, and control the power supply point to operate under the adjusted voltage sag event;

[0107] The second acquisition unit 230 is configured to acquire the voltage sag depth and voltage sag duration in the current voltage sag event as isolation point data if the voltage at the power receiving point is less than a preset voltage threshold.

[0108] In one of the embodiments, based on the above embodiment, the adjustment unit 220 is specifically used to: control the voltage sag depth to remain unchanged and increase the voltage sag duration.

[0109] In one of the embodiments, based on the above embodiment, the adjustment unit 220 is specifically used to: control the duration of the voltage sag to remain unchanged and increase the depth of the voltage sag.

[0110] In one embodiment, if Fig.10 As shown, based on the above embodiment, the second determination module 30 includes:

[0111] A first determining unit 310 is used to determine the correlation between the critical duration and the critical sag depth according to the multiple sets of isolation point data;

[0112] The second determining unit 320 is configured to determine the voltage sag isolation performance of the backup power supply system based on the association relationship.

[0113] In one embodiment, if Fig.11 As shown, based on the above embodiment, the second determining unit 320 includes:

[0114] A first determining subunit 3210 is used to determine a voltage sag isolation curve based on the association relationship;

[0115] The second determining subunit 3220 is used to determine the voltage sag isolation performance of the backup power supply system according to the closed area between the voltage sag isolation curve and the coordinate axis.

[0116] In one of the embodiments, based on the above embodiment, the above second determination unit 320 is specifically used to: determine the strength of the voltage sag isolation performance of the backup power supply system according to the size of the enclosed area, and the larger the enclosed area, the stronger the voltage sag isolation performance of the backup power supply system.

[0117] For the specific definition of the evaluation device of the backup power supply system, please refer to the definition of the evaluation method of the backup power supply system in the above text, which will not be repeated here. Each module in the above-mentioned evaluation device of the backup power supply system can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0118] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Fig.12 As shown. The computer device includes a processor, a memory and a network interface connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data such as the duration and depth of the voltage sag. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for evaluating a backup power supply system is implemented.

[0119] Those skilled in the art will understand that Fig.12The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0120] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0121] Control the power supply point to operate under different voltage sag events, and obtain the voltage of the receiving point under different voltage sag events; the voltage sag event includes the voltage sag depth and voltage sag duration;

[0122] Determine multiple groups of isolation point data according to the voltage of the power receiving point under different voltage sag events; the isolation point data includes the critical sag depth of the power supply point and / or the critical duration of the power supply point;

[0123] The voltage sag isolation performance of the backup power supply system is determined based on multiple groups of isolation point data.

[0124] In one embodiment, when the processor executes the computer program, the following steps are also implemented: controlling the power supply point to operate under a voltage sag event, and obtaining the voltage of the receiving point under the voltage sag event; if the voltage of the receiving point exceeds a preset voltage threshold, adjusting the voltage sag depth and / or the voltage sag duration in the voltage sag event, and controlling the power supply point to operate under the adjusted voltage sag event; if the voltage of the receiving point is less than the preset voltage threshold, obtaining the voltage sag depth and the voltage sag duration in the current voltage sag event as isolation point data.

[0125] In one embodiment, when the processor executes the computer program, the following steps are further implemented: controlling the voltage sag depth to remain unchanged and increasing the voltage sag duration.

[0126] In one embodiment, when the processor executes the computer program, the following steps are further implemented: controlling the duration of the voltage sag to remain unchanged and increasing the depth of the voltage sag.

[0127] In one embodiment, when the processor executes the computer program, the following steps are also implemented: determining the correlation between the critical duration and the critical sag depth according to multiple groups of isolation point data; and determining the voltage sag isolation performance of the backup power supply system based on the correlation.

[0128] In one embodiment, when the processor executes the computer program, the following steps are also implemented: determining a voltage sag isolation curve based on the association relationship; and determining the voltage sag isolation performance of the backup power supply system according to the closed area between the voltage sag isolation curve and the coordinate axis.

[0129] In one embodiment, when the processor executes the computer program, the following steps are also implemented: determining the strength of the voltage sag isolation performance of the backup power supply system according to the size of the enclosed area, the larger the enclosed area, the stronger the voltage sag isolation performance of the backup power supply system.

[0130] In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0131] Control the power supply point to operate under different voltage sag events, and obtain the voltage of the receiving point under different voltage sag events; the voltage sag event includes the voltage sag depth and voltage sag duration;

[0132] Determine multiple groups of isolation point data according to the voltage of the power receiving point under different voltage sag events; the isolation point data includes the critical sag depth of the power supply point and / or the critical duration of the power supply point;

[0133] The voltage sag isolation performance of the backup power supply system is determined based on multiple groups of isolation point data.

[0134] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: controlling the power supply point to operate under a voltage sag event, and obtaining the voltage of the receiving point under the voltage sag event; if the voltage of the receiving point exceeds a preset voltage threshold, adjusting the voltage sag depth and / or the voltage sag duration in the voltage sag event, and controlling the power supply point to operate under the adjusted voltage sag event; if the voltage of the receiving point is less than the preset voltage threshold, obtaining the voltage sag depth and the voltage sag duration in the current voltage sag event as isolation point data.

[0135] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: controlling the voltage sag depth to remain unchanged and increasing the voltage sag duration.

[0136] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: controlling the duration of the voltage sag to remain unchanged and increasing the depth of the voltage sag.

[0137] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: determining the correlation between the critical duration and the critical sag depth according to multiple groups of isolation point data; and determining the voltage sag isolation performance of the backup power supply system based on the correlation.

[0138] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: determining a voltage sag isolation curve based on the association relationship; and determining the voltage sag isolation performance of the backup power supply system according to the closed area between the voltage sag isolation curve and the coordinate axis.

[0139] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: determining the strength of the voltage sag isolation performance of the backup power supply system according to the size of the enclosed area, the larger the enclosed area, the stronger the voltage sag isolation performance of the backup power supply system.

[0140] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0141] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0142] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A method for evaluating a backup power supply system, wherein the backup power supply system is used to supply power to a receiving point when a voltage sag fault occurs at a power supply point, characterized in that: The method comprises: Controlling the power supply point to operate under different voltage sag events, and obtaining the voltage of the power receiving point under the different voltage sag events; the voltage sag event includes the voltage sag depth and the voltage sag duration, and the different voltage sag events are obtained by programming and controlling the programmable power supply to simulate different voltage sag events at the power supply point; Determine multiple groups of isolation point data according to the voltage of the power receiving point under the different voltage sag events; the isolation point data include the critical sag depth of the power supply point and / or the critical duration of the power supply point, the critical sag depth and the critical duration are the voltage sag depth and voltage sag duration in the most serious voltage sag event that can be successfully managed by the backup power supply system, and one group of isolation point data includes the longest voltage sag duration that can be successfully managed by the backup power supply system under a certain voltage sag depth, and the maximum voltage sag depth that can be successfully managed by the backup power supply system under a certain voltage sag duration; Determine the correlation between the critical duration and the critical sag depth according to the multiple groups of isolation point data; determine the voltage sag isolation curve based on the correlation; determine the voltage sag isolation performance of the backup power supply system according to the closed area of ​​the voltage sag isolation curve and the coordinate axis; The determining of multiple groups of isolation point data according to the voltage of the power receiving point under the different voltage sag events includes: controlling the power supply point to operate under the voltage sag event, and obtaining the voltage of the power receiving point under the voltage sag event; if the voltage of the power receiving point exceeds a preset voltage threshold, adjusting the voltage sag depth and / or voltage sag duration in the voltage sag event, and controlling the power supply point to operate under the adjusted voltage sag event; if the voltage of the power receiving point is less than the preset voltage threshold, obtaining the voltage sag depth and voltage sag duration in the current voltage sag event as the isolation point data.

2. The method according to claim 1, characterized in that The adjusting the voltage sag depth or voltage sag duration in the voltage sag event includes: The voltage sag depth is controlled to remain unchanged, and the voltage sag duration is increased.

3. The method according to claim 1, characterized in that The adjusting the voltage sag depth or voltage sag duration in the voltage sag event includes: The duration of the voltage sag is controlled to remain unchanged, and the depth of the voltage sag is increased.

4. The method according to claim 1, characterized in that The determining of the voltage sag isolation performance of the backup power supply system based on the closed area between the voltage sag isolation curve and the coordinate axis includes: determining the strength of the voltage sag isolation performance of the backup power supply system based on the size of the closed area, the larger the closed area, the stronger the voltage sag isolation performance of the backup power supply system.

5. The method according to claim 1, characterized in that The power supply point refers to a common connection point close to the programmable power supply and not electrically isolated from the programmable power supply.

6. The method according to claim 1, characterized in that The preset voltage threshold is a critical value used to indicate whether the backup power supply system successfully manages a voltage sag event.

7. The method according to claim 1, characterized in that The voltage level at the power receiving point is used to indicate whether the backup power supply system successfully manages the voltage sag event occurring at the power supply point.

8. An evaluation device for a backup power supply system, the backup power supply system being used to supply power to a receiving point when a voltage sag fault occurs at a power supply point, characterized in that: The device comprises: A control module, used to control the power supply point to operate under different voltage sag events, and obtain the voltage of the power receiving point under the different voltage sag events; the voltage sag event includes the voltage sag depth and the voltage sag duration, and the different voltage sag events are obtained by programming and controlling the programmable power supply to simulate different voltage sag events at the power supply point; A first determination module is used to determine multiple groups of isolation point data according to the voltage of the power receiving point under the different voltage sag events; the isolation point data includes a critical sag depth of the power supply point and / or a critical duration of the power supply point, the critical sag depth and the critical duration are the voltage sag depth and voltage sag duration in the most serious voltage sag event that can be successfully managed by the backup power supply system, and a group of the isolation point data includes the longest voltage sag duration that can be successfully managed by the backup power supply system under a certain voltage sag depth, and the maximum voltage sag depth that can be successfully managed by the backup power supply system under a certain voltage sag duration; A first determining unit, configured to determine a correlation between a critical duration and a critical sag depth according to the plurality of groups of isolation point data; A first determining subunit, configured to determine a voltage sag isolation curve based on the association relationship; A second determining subunit, configured to determine the voltage sag isolation performance of the backup power supply system according to the closed area of ​​the voltage sag isolation curve and the coordinate axis; Wherein, the first determining module includes: A first acquisition unit, used to control the power supply point to operate under a voltage sag event, and acquire the voltage of the power receiving point under the voltage sag event; an adjustment unit, configured to adjust the voltage sag depth and / or the voltage sag duration in the voltage sag event if the voltage at the power receiving point exceeds a preset voltage threshold, and control the power supply point to operate under the adjusted voltage sag event; The second acquisition unit is used to acquire the voltage sag depth and voltage sag duration in the current voltage sag event as the isolation point data if the voltage at the power receiving point is less than the preset voltage threshold.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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