Electric leakage monitoring method and system for alternating current and direct current complex scene

Abstract

The invention discloses an electric leakage monitoring method and system for alternating current and direct current complex scenes. The method comprises the following steps: collecting phase current and residual current in a distribution line; obtaining a phase current break variable and a residual current break variable based on the phase current and the residual current at the current sampling moment and the corresponding moment before one cycle; smoothing the phase current break variable and the residual current break variable to obtain phase current break variable smoothing data and residual current break variable smoothing data; and performing electric leakage monitoring based on the phase current sudden change smooth data and the residual current sudden change smooth data, and determining a monitoring result. The method can start the protection action of the residual current protection device when the leakage fault occurs, the residual current phasor break variable exceeds the limit, and the phase current phasor break variable does not exceed the limit, can avoid the fault false alarm caused by the inherent residual current, can be applied to the user side, the household box and the low-voltage side outlet of the transformer, and is suitable for popularization and application. Therefore, graded electric leakage monitoring is implemented.

Description

Technical Field

[0001] The present invention relates to the technical field of electricity safety leakage monitoring, and more specifically, to a leakage monitoring method and system for complex AC and DC scenarios. Background Art

[0002] The exploration of new technologies such as distributed new energy consumption, access to electric vehicle charging and discharging and energy storage, and low-voltage DC distribution networks and DC home appliances have put forward new requirements for improving the quality of electricity safety services and introduced new safety risks. At present, there is no good solution to the complex leakage current monitoring problems that may arise in the work of new power systems. The main problems are in three aspects: First, the detection capability of AC and DC leakage current is weak. Most of the current leakage protection devices are AC leakage protection type, which is not only difficult to play a protective role under DC leakage, but also has the risk of failure; second, the false alarm rate of faults is high, and there is a problem of over-level tripping, which affects the reliability of power supply. Since the terminal user may not install leakage protection or the leakage detection accuracy is low, if the terminal has a leakage fault or the first and second level leakage protection is falsely reported, it may cause the household box and the low-voltage side outlet of the transformer to trip, expand the scope of power outage, and cause safety problems and economic losses; third, there is no real-time leakage current monitoring platform, the collection capability of current and leakage current data is weak, and the degree of informatization is insufficient. The information of each branch is not collected and analyzed, and the operation status of the system cannot be displayed intuitively, resulting in the inability to quickly locate faults and prevent them in the early stages.

[0003] The prior art provides an AC / DC hybrid leakage monitoring and protection system and method based on a photovoltaic distribution network. By identifying the output signal of the DC leakage current, it is determined whether there is a DC leakage current, and the magnitude of the DC leakage current is detected. The detected data is uploaded to the cloud server through the network. The cloud server analyzes the information and then feeds it back to the application platform. The user receives the detection data through the application platform layer. The technology adopts adaptive magnetic modulation detection technology. When a DC leakage current appears in the main circuit, it is determined whether there is a leakage power supply by identifying the output signal, and the magnitude of the DC leakage current can be detected. However, the existing leakage monitoring system determines whether there is a leakage current and detects the magnitude of the leakage current by the output signal of the DC leakage current. This technology has the following defects: 1. Since there may be inherent leakage current in the distribution line, and the inherent residual current will produce a large fluctuation when the load is switched, in this case, the existing detection technology is very easy to produce misjudgment, and if a circuit breaker is installed, it will affect the power supply reliability; 2. Only the residual current of the terminal is monitored, and it has not been popularized to the leakage monitoring of other low-voltage DC distribution networks, and hierarchical detection has not been implemented, and leakage problems in the distribution line cannot be monitored.

[0004] Therefore, a leakage monitoring method for complex AC and DC scenarios is needed. Summary of the invention

[0005] The present invention proposes a leakage monitoring method and system for complex AC and DC scenarios to solve the problem of how to perform real-time monitoring of leakage conditions in distribution lines.

[0006] In order to solve the above problem, according to one aspect of the present invention, a leakage monitoring method for AC and DC complex scenarios is provided, the method comprising:

[0007] Collect phase current and residual current in distribution lines;

[0008] Based on the phase current and residual current at the current sampling moment and the corresponding moment one cycle ago, the phase current mutation amount and the residual current mutation amount are obtained;

[0009] Smoothing the phase current mutation amount and the residual current mutation amount to obtain phase current mutation amount smoothing data and residual current mutation amount smoothing data;

[0010] Based on the phase current mutation smoothing data and the residual current mutation smoothing data, leakage monitoring is performed to determine a monitoring result.

[0011] Preferably, the method further comprises:

[0012] Before obtaining the phase current mutation amount and the residual current mutation amount based on the phase current and the residual current at the current sampling moment and the corresponding moment one cycle ago, a Butterworth low-pass filter is used to perform digital filtering processing on the phase current and the residual current respectively.

[0013] Preferably, the method smoothes the phase current mutation and the residual current mutation in the following manner, including:

[0014] S t =|αX t -(1-α)S t-1 |,

[0015] Among them, S t is the smoothed data at time t, X t is the current mutation at time t, and a is the smoothing coefficient.

[0016] Preferably, the leakage monitoring based on the phase current mutation smoothed data and the residual current mutation smoothed data to determine the monitoring result includes:

[0017] Determine whether the phase current mutation smoothed data is less than the first preset threshold, and the residual current mutation smoothed data is greater than the second preset threshold. If both conditions are met, determine that the monitoring result is that the distribution line has a leakage. Otherwise, if both conditions are not met, determine that the monitoring result is that the distribution line has no leakage.

[0018] According to another aspect of the present invention, a leakage monitoring system for AC and DC complex scenarios is provided, the system comprising:

[0019] A collection unit, used for collecting phase current and residual current in the distribution line;

[0020] A current mutation amount acquisition unit, used for acquiring a phase current mutation amount and a residual current mutation amount based on a phase current and a residual current at a corresponding time one cycle ago at a current sampling time;

[0021] A smoothing processing unit, used for smoothing the phase current mutation amount and the residual current mutation amount to obtain smoothed data of the phase current mutation amount and smoothed data of the residual current mutation amount;

[0022] The monitoring unit is used to perform leakage monitoring based on the phase current mutation smoothing data and the residual current mutation smoothing data to determine the monitoring result.

[0023] Preferably, the system further comprises:

[0024] The filtering unit is used to digitally filter the phase current and the residual current respectively using a Butterworth low-pass filter before obtaining the phase current mutation amount and the residual current mutation amount based on the phase current and the residual current at the current sampling moment and the corresponding moment one cycle ago.

[0025] Preferably, the smoothing processing unit performs smoothing processing on the phase current mutation amount and the residual current mutation amount in the following manner, including:

[0026] S t =|αX t -(1-α)S t-1 |,

[0027] Among them, S t is the smoothed data at time t, X t is the current mutation at time t, and a is the smoothing coefficient.

[0028] Preferably, the monitoring unit performs leakage monitoring based on the phase current mutation smoothing data and the residual current mutation smoothing data to determine the monitoring result, including:

[0029] Determine whether the phase current mutation smoothed data is less than the first preset threshold, and the residual current mutation smoothed data is greater than the second preset threshold. If both conditions are met, determine that the monitoring result is that the distribution line has a leakage. Otherwise, if both conditions are not met, determine that the monitoring result is that the distribution line has no leakage.

[0030] Based on another aspect of the present invention, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any step of a leakage monitoring method for complex AC and DC scenarios.

[0031] According to another aspect of the present invention, the present invention provides an electronic device, including:

[0032] The computer-readable storage medium described above; and

[0033] One or more processors are used to execute the program in the computer-readable storage medium.

[0034] The present invention provides a leakage monitoring method and system for complex AC and DC scenarios, including: collecting phase current and residual current in distribution lines; obtaining phase current mutation and residual current mutation based on the phase current and residual current at the current sampling time and the corresponding time one cycle ago; smoothing the phase current mutation and residual current mutation to obtain phase current mutation smoothing data and residual current mutation smoothing data; performing leakage monitoring based on the phase current mutation smoothing data and residual current mutation smoothing data to determine the monitoring result. The present invention can keep the residual current protection device locked when the load is switched, the residual current phasor mutation exceeds the limit, and the phase current phasor mutation also exceeds the limit. When a leakage fault occurs, the residual current phasor mutation exceeds the limit, but the phase current phasor mutation does not exceed the limit, the residual current protection device protection action is started, which can avoid fault false alarms caused by inherent residual current, and the method of the present invention can be applied to the user side, the household box and the transformer low-voltage side outlet to implement hierarchical leakage monitoring, thereby achieving early fault prevention and rapid positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0036] Figure 1 Flow chart of a leakage monitoring method 100 for AC and DC complex scenarios according to an embodiment of the present invention;

[0037] Figure 2 A schematic diagram of phase current and residual current collection according to an embodiment of the present invention;

[0038] Figure 3It is a structural diagram of realizing the hierarchical leakage monitoring of the user side, household box and transformer low-voltage side outlet according to the implementation mode of the present invention;

[0039] Figure 4 Schematic diagram of the structure of a leakage monitoring system 400 for AC and DC complex scenarios according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] Now, exemplary embodiments of the present invention are described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0041] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0042] The method of the present invention realizes leakage monitoring based on the data perception layer, the transmission layer and the application layer. The data perception layer collects the mutation of the residual current and the phase current of the line, and only when the mutation of the residual current phasor exceeds the limit, but the mutation of the phase current phasor does not exceed the limit, it is considered that a leakage fault has occurred; the transmission layer uses the Internet of Things technology to upload the phase current, residual current and fault discrimination information detected by the data perception layer to the cloud server, and the cloud server analyzes the data and feeds it back to the application layer; the management user can observe the monitoring data in real time through the application layer.

[0043] Figure 1 FIG. 1 is a flow chart of a leakage monitoring method 100 for AC and DC complex scenarios according to an embodiment of the present invention. Figure 1As shown, the leakage monitoring method for complex AC and DC scenarios provided by the embodiment of the present invention can keep the residual current protection device locked when the load is switched, the residual current phasor mutation exceeds the limit, and the phase current phasor mutation also exceeds the limit. When a leakage fault occurs, the residual current phasor mutation exceeds the limit, but the phase current phasor mutation does not exceed the limit, the residual current protection device protection action is started, which can avoid false fault alarms caused by inherent residual current, and the method of the present invention can be applied to the user side, household boxes and transformer low-voltage side outlets to implement hierarchical leakage monitoring, thereby achieving early fault prevention and rapid positioning. The leakage monitoring method 100 for complex AC and DC scenarios provided by the embodiment of the present invention starts from step 101. In step 101, the phase current and residual current in the distribution line are collected.

[0044] In step 102, based on the phase current and the residual current at the current sampling moment and the corresponding moment one cycle ago, the phase current mutation amount and the residual current mutation amount are obtained.

[0045] Preferably, the method further comprises:

[0046] Before obtaining the phase current mutation amount and the residual current mutation amount based on the phase current and the residual current at the current sampling moment and the corresponding moment one cycle ago, a Butterworth low-pass filter is used to perform digital filtering processing on the phase current and the residual current respectively.

[0047] In the present invention, the leakage monitoring module for realizing the data perception layer and the transmission layer is installed on the user side, the household box and the low-voltage side outlet of the transformer to realize hierarchical leakage monitoring.

[0048] Combination Figure 2 As shown, in the present invention, based on the data perception layer collecting the phase current and the residual current in the circuit, the collected phase current and the residual current are filtered and difference processed respectively, so as to obtain the phase current mutation amount and the residual current mutation amount.

[0049] Specifically, in the present invention, the data perception layer collects the phase current and the residual current in the circuit, and digitally filters the collected phase current and the residual current using a Butterworth low-pass filter, respectively, and the transfer function is:

[0050] H(s)=ω c n / (s n +a n-1 s n-1 +...+a 1 +ω c n ),

[0051] Among them, ω cis the cut-off angular frequency, set to 2π×500rad / s; n is the filter order, set n=4; the phase filter current I after filtering is obtained p (t) and the residual filter current I r (t).

[0052] Then, the phase filter current and the residual filter current are respectively subjected to difference processing with the phase filter current and the residual filter current corresponding to one cycle ago, so as to obtain the phase current mutation amount and the residual current mutation amount, and the calculation formula is:

[0053] ΔI p =|I p (t)-I p (tT)|,

[0054] ΔI r =|I r (t)-I r (tT)|.

[0055] In step 103, the phase current mutation amount and the residual current mutation amount are smoothed to obtain phase current mutation amount smoothed data and residual current mutation amount smoothed data.

[0056] Preferably, the method smoothes the phase current mutation and the residual current mutation in the following manner, including:

[0057] S t =|αX t -(1-α)S t-1 |,

[0058] Among them, S t is the smoothed data at time t, X t is the current mutation at time t, and α is the smoothing coefficient.

[0059] In the present invention, after the phase current mutation amount and the residual current mutation amount are obtained, smoothing processing is performed respectively to obtain smoothed data of the phase current mutation amount and smoothed data of the residual current mutation amount. Among them, the exponential smoothing method is used to smooth the data, including:

[0060] S t =|αX t -(1-α)S t-1 |,

[0061] Among them, S t is the smoothed value of the data at time t, X t is the measured value of the data at time t, that is, the current mutation amount, α is the smoothing coefficient, and its value range is (0,1).

[0062] In step 104, leakage monitoring is performed based on the phase current mutation smoothing data and the residual current mutation smoothing data to determine a monitoring result.

[0063] Preferably, the leakage monitoring based on the phase current mutation smoothed data and the residual current mutation smoothed data to determine the monitoring result includes:

[0064] Determine whether the phase current mutation smoothed data is less than the first preset threshold, and the residual current mutation smoothed data is greater than the second preset threshold. If both conditions are met, determine that the monitoring result is that the distribution line has a leakage. Otherwise, if both conditions are not met, determine that the monitoring result is that the distribution line has no leakage.

[0065] In the present invention, it is determined whether the phase current mutation smoothed data is less than a first preset threshold value, and it is determined whether the residual current mutation smoothed data is greater than a second preset threshold value. When the phase current mutation smoothed data is less than the first preset threshold value and the residual current mutation smoothed data is greater than the second preset threshold value, it is determined that there is leakage in the distribution line, otherwise, it is determined that there is no leakage in the distribution line.

[0066] Combination Figure 3 As shown, in the present invention, current information and leakage monitoring results can be connected to the Internet through LoRa or NB-IoT and other Internet of Things technologies and uploaded in real time. The data is uploaded to the cellular mobile communication network GSM through the Internet of Things communication base station, and the data is transmitted to the cloud server platform. The data is integrated through the background cloud platform, and the operation and maintenance personnel can access it through the mobile terminal or PC terminal to perform real-time remote monitoring of the line leakage.

[0067] In the present invention, the data frame results of data upload are shown in Table 1 below.

[0068] Table 1 Data frame structure table

[0069] Attribute Category Number of bytes Frame Header 2 bytes Device ID 4 bytes Timestamp 4 bytes Phase current 4 bytes Phase current sudden change 4 bytes Residual current 4 bytes Residual current mutation 4 bytes Warning signs 1 byte CRC Check 2 bytes

[0070] The method of the present invention can realize accurate monitoring of the leakage of distribution lines, avoid false fault alarms caused by inherent residual current, and implement graded leakage monitoring on the user side, household boxes and transformer low-voltage side outlets, so as to realize early prevention and rapid positioning of faults.

[0071] Figure 4 FIG. 4 is a schematic diagram of a leakage monitoring system 400 for AC and DC complex scenarios according to an embodiment of the present invention. Figure 4As shown, the leakage monitoring system 400 for AC and DC complex scenarios provided by the embodiment of the present invention includes: a collection unit 401, a current mutation acquisition unit 402, a smoothing processing unit 403 and a monitoring unit 404.

[0072] Preferably, the collection unit 401 is used to collect phase current and residual current in the distribution line.

[0073] Preferably, the current mutation amount acquisition unit 402 is used to acquire the phase current mutation amount and the residual current mutation amount based on the phase current and the residual current at the current sampling moment and the corresponding moment one cycle ago.

[0074] Preferably, the system further comprises:

[0075] The filtering unit is used to digitally filter the phase current and the residual current respectively using a Butterworth low-pass filter before obtaining the phase current mutation amount and the residual current mutation amount based on the phase current and the residual current at the current sampling moment and the corresponding moment one cycle ago.

[0076] Preferably, the smoothing processing unit 403 is used to perform smoothing processing on the phase current mutation amount and the residual current mutation amount to obtain phase current mutation amount smoothing data and residual current mutation amount smoothing data.

[0077] Preferably, the smoothing processing unit 403 performs smoothing processing on the phase current mutation amount and the residual current mutation amount in the following manner, including:

[0078] S t =|αX t -(1-α)S t-1 |,

[0079] Among them, S t is the smoothed data at time t, X t is the current mutation at time t, and α is the smoothing coefficient.

[0080] Preferably, the monitoring unit 404 is used to perform leakage monitoring based on the phase current mutation amount smoothed data and the residual current mutation amount smoothed data to determine a monitoring result.

[0081] Preferably, the monitoring unit 404 performs leakage monitoring based on the phase current mutation smoothing data and the residual current mutation smoothing data to determine the monitoring result, including:

[0082] Determine whether the phase current mutation smoothed data is less than the first preset threshold, and the residual current mutation smoothed data is greater than the second preset threshold. If both conditions are met, determine that the monitoring result is that the distribution line has a leakage. Otherwise, if both conditions are not met, determine that the monitoring result is that the distribution line has no leakage.

[0083] The leakage monitoring system 400 for AC / DC complex scenarios of the embodiment of the present invention corresponds to the leakage monitoring method 100 for AC / DC complex scenarios of another embodiment of the present invention, which will not be described in detail here.

[0084] Based on another aspect of the present invention, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any step of a leakage monitoring method for complex AC and DC scenarios.

[0085] According to another aspect of the present invention, the present invention provides an electronic device, including:

[0086] The computer-readable storage medium described above; and

[0087] One or more processors are used to execute the program in the computer-readable storage medium.

[0088] The invention has been described above with reference to a few embodiments. However, it is readily apparent to a person skilled in the art that other embodiments than the ones disclosed above are equally within the scope of the invention, as defined by the appended patent claims.

[0089] Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise therein. All references to "a / said / the [means, components, etc.]" are to be openly interpreted as at least one instance of said means, components, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not necessarily have to be performed in the exact order disclosed, unless explicitly stated otherwise.

[0090] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0091] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0092] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0093] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A leakage monitoring method for complex AC and DC scenarios, characterized in that: The method comprises: Collect phase current and residual current in distribution lines; Based on the phase current and residual current at the current sampling moment and the corresponding moment one cycle ago, the phase current mutation amount and the residual current mutation amount are obtained; Smoothing the phase current mutation amount and the residual current mutation amount to obtain phase current mutation amount smoothing data and residual current mutation amount smoothing data; Based on the phase current mutation smoothing data and the residual current mutation smoothing data, leakage monitoring is performed to determine a monitoring result.

2. The method according to claim 1, characterized in that The method further comprises: Before obtaining the phase current mutation amount and the residual current mutation amount based on the phase current and the residual current at the current sampling moment and the corresponding moment one cycle ago, a Butterworth low-pass filter is used to perform digital filtering processing on the phase current and the residual current respectively.

3. The method according to claim 1, characterized in that The method uses the following method to smooth the phase current mutation amount and the residual current mutation amount, including: S t =|αX t -(1-α)S t-1 |, Among them, S t is the smoothed data at time t, X t is the current mutation at time t, and a is the smoothing coefficient.

4. The method according to claim 1, characterized in that: The leakage monitoring based on the phase current mutation smoothed data and the residual current mutation smoothed data is performed to determine the monitoring result, including: Determine whether the phase current mutation smoothed data is less than the first preset threshold, and the residual current mutation smoothed data is greater than the second preset threshold. If both conditions are met, determine that the monitoring result is that the distribution line has a leakage. Otherwise, if both conditions are not met, determine that the monitoring result is that the distribution line has no leakage.

5. A leakage monitoring system for AC and DC complex scenarios, characterized in that: The system comprises: A collection unit, used for collecting phase current and residual current in the distribution line; A current mutation amount acquisition unit, used for acquiring a phase current mutation amount and a residual current mutation amount based on a phase current and a residual current at a corresponding time one cycle ago at a current sampling time; A smoothing processing unit, used for smoothing the phase current mutation amount and the residual current mutation amount to obtain smoothed data of the phase current mutation amount and smoothed data of the residual current mutation amount; The monitoring unit is used to perform leakage monitoring based on the phase current mutation smoothing data and the residual current mutation smoothing data to determine the monitoring result.

6. The system according to claim 5, characterized in that The system further comprises: The filtering unit is used to digitally filter the phase current and the residual current respectively using a Butterworth low-pass filter before obtaining the phase current mutation amount and the residual current mutation amount based on the phase current and the residual current at the current sampling moment and the corresponding moment one cycle ago.

7. The system according to claim 5, characterized in that The smoothing processing unit performs smoothing processing on the phase current mutation amount and the residual current mutation amount in the following manner, including: S t =|αX t -(1-α)S t-1 |, Among them, S t is the smoothed data at time t, X t is the current mutation at time t, and α is the smoothing coefficient.

8. The system according to claim 5, characterized in that The monitoring unit performs leakage monitoring based on the phase current mutation smoothing data and the residual current mutation smoothing data to determine the monitoring result, including: Determine whether the phase current mutation smoothed data is less than the first preset threshold, and the residual current mutation smoothed data is greater than the second preset threshold. If both conditions are met, determine that the monitoring result is that the distribution line has a leakage. Otherwise, if both conditions are not met, determine that the monitoring result is that the distribution line has no leakage.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 4 are implemented.

10. An electronic device, characterized in that: include: The computer readable storage medium as claimed in claim 9; as well as One or more processors are used to execute the program in the computer-readable storage medium.

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