CN115511361A - Method, system, storage medium, and computer for evaluating risk of power outage in distribution network - Google Patents

Abstract

The invention relates to a power distribution network risk assessment method, and provides a power distribution network power failure risk assessment method.

Description

Method, system, storage medium, and computer for evaluating risk of power outage in distribution network

technical field

The present invention relates to the technical field of power grid early warning, and more specifically, it relates to a method, system, storage medium and computer for evaluating the risk of power failure in a distribution network.

Background technique

The safe and reliable operation of the distribution network is directly related to the normal production of all walks of life and people's daily life. The reliability evaluation and prediction of the distribution network is very important for improving the reliability of the distribution network, improving the quality of power, and improving the operation economy of the distribution network. It is of great significance to improve the stability and optimize the operation arrangement of distribution network.

With the development of the power system, the stability of the distribution network is getting higher and higher, but people's dependence on power is also getting higher and higher, so the losses caused by each emergency power outage are also increasing. In order to avoid the risk of large-scale power outages caused by faults in the distribution network, accurate risk assessment is required for the distribution network in operation. On the one hand, it is convenient to take corresponding measures to reduce losses caused by power outages. The detection of the equipment area can also improve the accuracy of fault detection.

However, the existing distribution network outage risk assessment is not accurate enough to reflect the actual operating conditions of the distribution network, which will greatly increase the workload of distribution network equipment maintenance and cause huge losses due to power outages.

Contents of the invention

In view of the deficiencies in the existing technology, the purpose of the present invention is to provide a distribution network outage risk assessment method, system, storage medium and computer to solve the problem that the existing distribution network outage risk assessment results are not accurate enough.

The above technical purpose of the present invention is achieved through the following technical solutions: including: obtaining historical data of power supply of the distribution network; correspondingly collecting distribution network outage information according to the historical data; the distribution network outage information includes : Outage reasons, outage time and outage scope of the distribution network; according to the outage time and outage scope, the standard risk level is correspondingly divided, and all outage reasons are equal to the standard risk level One-to-one matching; in the case that the cause of the fault outage occurs again, an early warning will be given according to the standard risk level corresponding to the cause of the fault outage, and the corresponding distribution network maintenance department will be notified to take corresponding risk response measures .

Optionally, the reasons for the outage of the fault include: foreign object fault in the distribution network: the distribution network operates in a natural environment, and the fault caused by the influence of natural factors, including tripping caused by foreign objects falling on the distribution network line; the distribution network Man-made damage faults: faults caused by the influence of people's production and living activities on the distribution network, including: excavation operations damage distribution network lines buried underground, high-altitude operations accidentally touch distribution network lines or steal cables; equipment aging faults: power distribution Failures caused by network lines or power equipment due to poor quality, equipment aging or poor installation, including: cable insulation breakdown, power distribution ring network cabinet opening and closing lock burning, isolation switch contact defect; natural disaster failure: in the natural environment Faults caused by the influence of extreme weather such as strong winds, heavy rain, heavy snow and hail on the distribution network; user power failures: failures caused by the users themselves, including: poor quality of electrical appliances, irregular electricity usage habits The problem of reduced equipment reliability.

Optionally, the corresponding division of the standard risk level according to the failure outage time and the scope of the failure outage includes: correspondingly dividing the power outage risk into five categories according to the severity of the load loss probability, the degree of serious power shortage and the degree of important load loss. Levels: very serious, serious, fair, slight, very slight.

Optionally, the early warning is given according to the standard risk level corresponding to the cause of the fault outage, and the corresponding distribution network maintenance department is notified to take corresponding risk response measures, including: if the standard risk level is very slight, then The distribution network maintenance department performs inspections at the first frequency; if the standard risk level is slight, the distribution network maintenance department performs inspections at the second frequency; if the standard risk level is normal, the distribution network maintenance department performs inspections at the third frequency Maintenance; if the standard risk level is serious, the distribution network maintenance department will carry out maintenance at the fourth frequency; if the standard risk level is very serious, the power will be cut off immediately, and timely maintenance will eliminate potential safety hazards; the first frequency is 1 time/60 days, the second frequency is 1 time/30 days, the third frequency is 1 time/15 days, and the fourth frequency is 1 time/7 days.

Optionally, it also includes obtaining the power supply area in the distribution network whose number of faults exceeds a threshold, recording it as a vulnerable area, and dividing the vulnerable area into five levels according to the number of power supply failures corresponding to the vulnerable area : very serious, serious, general, slight, very slight.

Optionally, according to the level corresponding to the vulnerable area, the maintenance frequency of the distribution network maintenance department for the vulnerable area is correspondingly adjusted; Execute maintenance; if the level of vulnerable areas is minor, the distribution network maintenance department will perform maintenance at the second frequency; if the level of vulnerable areas is general, the distribution network maintenance department will perform maintenance at the third frequency; if the level of vulnerable areas If it is serious, the distribution network maintenance department will carry out inspections at the fourth frequency; if the vulnerable area is very serious, the distribution network maintenance department will carry out inspections at the fifth frequency; the first frequency is 1 time/60 days, The second frequency is 1 time/30 days, the third frequency is 1 time/15 days, the fourth frequency is 1 time/7 days, and the fifth frequency is 1 time/3 days.

A distribution network outage risk assessment system, comprising,

Data acquisition module: used to acquire the historical data of the power supply of the distribution network;

Information collection module: used for correspondingly collecting outage information of the distribution network according to the historical data;

Risk level evaluation module: according to the fault outage time and fault outage scope, the standard risk level is correspondingly divided;

Matching module: used to match all causes of outages with standard risk levels one by one;

Pre-warning module: used to give early warning according to the standard risk level corresponding to the cause of the outage when the cause of the outage occurs again.

Optional, include:

Vulnerable area division module: used to obtain the power supply area in the distribution network where the number of faults exceeds the threshold, record it as a vulnerable area, and correspond to the vulnerable area according to the number of power supply failures corresponding to the vulnerable area;

Service life statistics module: according to the service life of the electric equipment and the predetermined design service life, it can remind the relevant maintainers to replace the electric equipment in time.

A computer device includes a memory and a processor, the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

A computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above-mentioned method are realized.

To sum up, the present invention has the following beneficial effects: the present invention proposes a method for assessing the risk of power outages in distribution networks, through the statistics and analysis of historical data, and the mutual matching of the causes and risk levels of power outage risks, the power distribution network can be assessed In order to predict a certain power failure trigger factor that occurs in the actual power supply area of the distribution network, and take corresponding emergency repair measures according to the prediction result, the loss caused by the power failure of the distribution network can be effectively reduced.

Description of drawings

Fig. 1 is a flow chart of a method for assessing the risk of a power outage in a distribution network of the present invention;

Fig. 2 is a kind of distribution network outage risk assessment system structural diagram of the present invention;

FIG. 3 is an internal structure diagram of a computer device in an embodiment of the present invention.

In the figure: 1. Data acquisition module; 2. Information collection module; 3. Risk level assessment module; 4. Matching module; 5. Early warning module; 6. Vulnerable area division module; 7. Service life statistics module.

detailed description

In order to make the purpose, features and advantages of the present invention more obvious and understandable, the specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings. Several embodiments of the invention are shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions are used for the purpose of description only and do not indicate or imply that the device or element referred to must have a specific Orientation, construction and operation in a particular orientation, therefore should not be construed as limiting the invention.

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

The present invention provides a method for evaluating the risk of a power outage in a distribution network, as shown in FIG. Network outage information includes: distribution network outage reasons, outage time, and outage scope; according to the outage time and outage scope, the standard risk level is correspondingly divided, and all outage reasons One-to-one correspondence with the standard risk level; in the case that the cause of the outage occurs again, an early warning will be given according to the standard risk level corresponding to the cause of the outage, and the corresponding distribution network maintenance department will be notified to make a decision. Corresponding risk response measures.

Specifically, in the actual use process, in order to improve the accuracy of the power outage risk assessment of the distribution network, this application first evaluates the distribution network according to the historical data of the distribution network operation, and collects the corresponding Fault information, where the fault information mainly includes the cause of the fault, the time of the fault outage, and the scope of the fault outage. The larger the value, the higher the corresponding fault level. In this application, the weight of the fault outage time and the fault outage range to the fault level is 1:1, that is, the fault outage time and the fault outage range are respectively A threshold is set, and the ratio of the actual outage time and outage range to the threshold is weighted and averaged to calculate the comprehensive percentage of the two outage factors, and then the comprehensive percentage is divided into failure levels. Match the graded failure outage criteria with the corresponding failure outage reasons one by one, and for a specific failure outage cause, select the corresponding risk level with the highest probability as the failure outage reason The corresponding risk level of outage, so that when the cause of subsequent outage occurs again, an alarm can be sent to people according to the risk level corresponding to the cause of outage, so as to ensure the normal use of the power distribution network.

Further, the reasons for the outage include: distribution network foreign object fault: the distribution network operates in a natural environment, due to the fault caused by natural factors, including tripping caused by foreign objects falling on the distribution network line; distribution network man-made Damage faults: faults caused by the influence of people's production and living activities on the distribution network, including: excavation operations damage distribution network lines buried underground, high-altitude operations accidentally touch distribution network lines or steal cables; equipment aging faults: distribution network Failures of lines or power equipment due to poor quality, equipment aging or poor installation, including: cable insulation breakdown, power distribution ring network cabinet opening and closing lock burning, isolation switch contact defects; Faults caused by power grids affected by extreme weather such as strong winds, heavy rains, snowstorms, and hail; user power failures: failures caused by users themselves, including: poor quality of electrical appliances, irregular electricity usage habits The problem of reduced equipment reliability.

In the actual use process, the fault factors of the distribution network are more frequently affected by natural factors, such as foreign objects falling on the wires of the distribution network and causing short circuits, but the faults caused by such natural factors are usually relatively minor, which is convenient for maintenance. Therefore, the corresponding fault level is relatively low. Man-made damage faults are usually more serious, but the fault location is relatively clear, so the main time spent is the time required for emergency repairs, so there will be no excessive impact on such faults . For the aging failure of equipment, the impact is usually greater, and the repair process is more cumbersome, it is difficult to replace the damaged equipment in a timely manner. Once the equipment does not match, production equipment is required, and the impact is usually longer. As for the user's power failure, it usually only affects a single household of the user, the impact range is small, and the maintenance is convenient and fast, so the risk level caused is also low. For natural disaster faults with a large impact range and long failure time, It needs to be rated as a more serious risk level.

Further, the corresponding division of the standard risk level according to the failure outage time and the scope of the failure outage includes: correspondingly dividing the power outage risk into five categories according to the severity of the load loss probability, the degree of serious shortage of electricity and the degree of important load loss. Grade: very serious, serious, fair, slight, very slight.

Further, the early warning is given according to the standard risk level corresponding to the cause of the fault outage, and the corresponding distribution network maintenance department is notified to take corresponding risk response measures, including: if the standard risk level is very slight, the distribution network The power grid maintenance department performs maintenance at the first frequency; if the standard risk level is slight, the distribution network maintenance department performs maintenance at the second frequency; if the standard risk level is normal, the distribution network maintenance department performs maintenance at the third frequency ; If the standard risk level is serious, the distribution network maintenance department will carry out maintenance according to the fourth frequency; if the standard risk level is very serious, the power will be cut off immediately, and timely maintenance will eliminate potential safety hazards; the first frequency is 1 time/60 days , the second frequency is 1 time/30 days, the third frequency is 1 time/15 days, and the fourth frequency is 1 time/7 days.

By classifying outage failure levels, and then deploying network maintenance personnel to carry out regular maintenance on the area corresponding to the cause of the failure, the probability of failure of the distribution network can be effectively reduced. Avoid long-term power outages affecting the power supply area.

Further, it also includes obtaining the power supply area in the distribution network where the number of faults exceeds the threshold, recording it as a vulnerable area, and dividing the vulnerable area into five levels according to the number of power supply failures corresponding to the vulnerable area: Very serious, severe, moderate, slight, very slight.

Further, according to the level corresponding to the vulnerable area, the maintenance frequency of the distribution network maintenance department for the vulnerable area is correspondingly adjusted; if the level of the vulnerable area is very slight, the distribution network maintenance department performs the inspection according to the first frequency Maintenance; if the level of the vulnerable area is minor, the distribution network maintenance department will carry out the maintenance at the second frequency; if the level of the vulnerable area is general, the distribution network maintenance department will perform the maintenance at the third frequency; if the level of the vulnerable area is serious, the distribution network maintenance department will carry out inspections at the fourth frequency; if the vulnerable area is very serious, the distribution network maintenance department will carry out inspections at the fifth frequency; the first frequency is 1 time/60 days, so The second frequency is 1 time/30 days, the third frequency is 1 time/15 days, the fourth frequency is 1 time/7 days, and the fifth frequency is 1 time/3 days.

By recording and classifying the vulnerable areas, and performing frequency inspections on the vulnerable areas according to the classified levels, the stability of the power supply of the distribution network in the vulnerable areas can be effectively improved, and the risk of power outage in the vulnerable areas can be reduced.

As shown in Figure 2, the present invention also provides a distribution network blackout risk assessment system, including:

Data acquisition module 1: used to acquire the historical data of the power supply of the distribution network;

Information collection module 2: for correspondingly collecting outage information of the distribution network according to the historical data;

Risk level evaluation module 3: according to the fault outage time and fault outage scope, the standard risk level is correspondingly divided;

Matching module 4: used to match all causes of outages with standard risk levels one by one;

Early-warning module 5: used for giving early warning according to the standard risk level corresponding to the cause of failure and outage when the cause of failure and outage occurs again.

Further, a distribution network power outage risk assessment system also includes:

Vulnerable area division module 6: used to obtain the power supply area in the distribution network where the number of faults exceeds the threshold, record it as a vulnerable area, and correspond to the vulnerable area according to the number of power supply failures corresponding to the vulnerable area;

Service life statistics module 7: According to the service life of the electric equipment and the predetermined design service life, it can remind the relevant maintainers to replace the electric equipment in time.

For the specific definition of a distribution network outage risk assessment system, please refer to the above definition for a distribution network outage risk assessment method, which will not be repeated here. Each module in the above distribution network power outage risk assessment system can be fully or partially realized 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, and can also be stored in the memory of the computer device in the form of software, so that the processor can invoke and execute the corresponding operations of the above-mentioned modules.

In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure may be as shown in FIG. 3 . The computer device includes a processor, memory, network interface and database connected by a system bus. Wherein, the processor of the computer device is used to provide calculation 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, computer programs and databases. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. When the computer program is executed by the processor, a method for assessing the power failure risk of the distribution network is realized.

Those skilled in the art can understand that the structure shown in Figure 3 is only a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation to the computer equipment on which the solution of the application is applied. The specific computer equipment can be More or fewer components than shown in the figures may be included, or some components may be combined, or have a different arrangement of components.

In one embodiment, a computer device is provided, including a memory and a processor, a computer program is stored in the memory, and the processor implements the following steps when executing the computer program: including: obtaining historical data of power supply of the distribution network; according to The historical data corresponds to the collection of distribution network outage information; the distribution network outage information includes: the fault outage reason, fault outage time and fault outage range of the distribution network; according to the fault outage time and The fault outage scope corresponds to the standard risk level, and all the fault outage reasons are matched with the standard risk level one by one; The standard risk level will be used for early warning, and the corresponding distribution network maintenance department will be notified to take corresponding risk response measures.

In one embodiment, the reasons for the outage include: distribution network foreign object fault: the distribution network operates in a natural environment, due to the fault caused by natural factors, including foreign objects collapsing on the distribution network line and causing tripping; Man-made damage to the power grid: faults caused by the impact of people's production and living activities on the distribution network, including: excavation damage to buried distribution network lines, high-altitude operations accidentally touching distribution network lines or stealing cables; equipment aging faults: Failures of distribution network lines or power equipment due to poor quality, equipment aging or poor installation, including: cable insulation breakdown, power distribution ring network cabinet opening and closing lock burning, isolation switch contact defects; natural disaster failure: in a natural environment The distribution network in China is affected by extreme weather such as strong winds, rainstorms, snowstorms, and hail. Faults caused by user power consumption: faults caused by users themselves, including: poor quality of electrical appliances, bad habits of electricity consumption The problem of equipment reliability reduction caused by the specification.

In one embodiment, the corresponding division of the standard risk level according to the fault outage time and the fault outage range includes: correspondingly classifying the risk of power outage according to the severity of the load loss probability, the degree of serious shortage of electricity, and the degree of important load loss There are five levels: very serious, serious, fair, slight, and very slight.

In one embodiment, the early warning is given according to the standard risk level corresponding to the cause of the fault outage, and the corresponding distribution network maintenance department is notified to take corresponding risk countermeasures, including: if the standard risk level is very slight , the distribution network maintenance department will carry out inspections at the first frequency; if the standard risk level is slight, the distribution network maintenance department will carry out inspections at the second frequency; if the standard risk level is normal, the distribution network maintenance department will carry out inspections at the third frequency Perform inspections frequently; if the standard risk level is serious, the distribution network maintenance department will perform inspections at the fourth frequency; if the standard risk level is very serious, immediately cut off the power and conduct timely inspections to eliminate potential safety hazards; the first frequency is 1 time /60 days, the second frequency is 1 time/30 days, the third frequency is 1 time/15 days, and the fourth frequency is 1 time/7 days.

In one embodiment, it also includes acquiring the power supply area in the distribution network whose fault times exceed the threshold value, recording it as a vulnerable area, and dividing the vulnerable area into five correspondingly according to the number of power supply failures corresponding to the vulnerable area Levels: very serious, serious, fair, slight, very slight.

In one embodiment, according to the level corresponding to the vulnerable area, the maintenance frequency of the distribution network maintenance department for the vulnerable area is correspondingly adjusted; if the level of the vulnerable area is extremely slight, the distribution network maintenance department Perform maintenance at the first frequency; if the level of vulnerable areas is minor, the distribution network maintenance department will perform maintenance at the second frequency; if the level of vulnerable areas is normal, the distribution network maintenance department will perform maintenance at the third frequency; If the level of the area is serious, the maintenance department of the distribution network will carry out maintenance at the fourth frequency; if the level of the vulnerable area is very serious, the maintenance department of the distribution network will carry out the maintenance at the fifth frequency; the first frequency is 1 time/60 days, the second frequency is 1 time/30 days, the third frequency is 1 time/15 days, the fourth frequency is 1 time/7 days, and the fifth frequency is 1 time/3 days.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the computer programs can be stored in a non-volatile computer-readable memory In the medium, when the computer program is executed, it may include the processes of the embodiments of the above-mentioned methods. Wherein, any references to memory, storage, database or other media used in the various embodiments provided in the present application may include non-volatile and/or volatile memory. Nonvolatile memory can include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Chain Synchlink DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

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

The above descriptions are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention should also be regarded as the protection scope of the present invention.

Claims (10)

1. A method for assessing the risk of a power outage in a distribution network, comprising: Obtain the historical data of the power supply of the distribution network; Correspondingly collect distribution network outage information according to the historical data; the distribution network outage information includes: a fault outage reason, a fault outage time, and a fault outage range of the distribution network; Correspondingly divide the standard risk level according to the outage time and the scope of the outage, and match all the reasons for outage with the standard risk level one by one; In the case that the cause of the outage occurs again, an early warning is given according to the standard risk level corresponding to the cause of the outage, and the corresponding distribution network maintenance department is notified to take corresponding risk countermeasures. 2. A method for assessing the risk of a power outage in a distribution network according to claim 1, wherein the cause of the outage includes: Foreign object fault in distribution network: The distribution network operates in a natural environment, due to the fault caused by natural factors, including foreign objects falling on the distribution network line and causing tripping; Distribution network man-made damage fault: The distribution network is affected by people's production and living activities, including: excavation operations damage distribution network lines buried underground, high-altitude operations accidentally touch distribution network lines or steal cables; Equipment aging failure: distribution network lines or power equipment failures caused by poor quality, equipment aging or poor installation, including: cable insulation breakdown, power distribution ring network cabinet opening and closing lock burning, isolation switch contact defects; Natural disaster failure: the distribution network in the natural environment is affected by extreme weather such as strong wind, heavy rain, snowstorm and hail. User power failure: failure caused by the user itself, including: poor quality of electrical appliances, non-standard electricity usage behavior and lower reliability of equipment caused by electricity consumption habits. 3. A method for assessing the risk of a power outage in a distribution network according to claim 1, wherein the corresponding division of standard risk levels according to the fault outage time and the fault outage range includes: According to the severity of load loss probability, severe power shortage and important load loss, the risk of power outage is divided into five levels: very serious, serious, general, slight, and very slight. 4. A method for assessing the risk of a power outage in a distribution network according to claim 1, wherein the warning is carried out according to the standard risk level corresponding to the cause of the fault outage, and the corresponding distribution network maintenance department is notified Take corresponding risk response measures, including: If the standard risk level is very slight, the distribution network maintenance department will carry out maintenance at the first frequency; If the standard risk level is slight, the distribution network maintenance department will carry out maintenance at the second frequency; If the standard risk level is normal, the distribution network maintenance department will perform maintenance at the third frequency; If the standard risk level is serious, the maintenance department of the distribution network will carry out maintenance at the fourth frequency; If the standard risk level is very serious, the power will be cut off immediately, and the safety hazards will be eliminated by timely maintenance; The first frequency is 1 time/60 days, the second frequency is 1 time/30 days, the third frequency is 1 time/15 days, and the fourth frequency is 1 time/7 days. 5. A method for assessing the risk of a power outage in a distribution network according to claim 1, further comprising, obtaining a power supply area in which the number of failures in the distribution network exceeds a threshold, recording it as a vulnerable area, and according to the The number of power supply failures corresponding to the vulnerable area corresponds to dividing the vulnerable area into five levels: very serious, serious, general, slight, and very slight. 6. The method for assessing the risk of a power outage in a distribution network according to claim 1, wherein, according to the level corresponding to the vulnerable area, the maintenance frequency of the vulnerable area by the distribution network maintenance department is correspondingly adjusted; If the level of the vulnerable area is very slight, the maintenance department of the distribution network will carry out the maintenance according to the first frequency; If the level of the vulnerable area is slight, the distribution network maintenance department will carry out maintenance at the second frequency; If the level of vulnerable areas is normal, the distribution network maintenance department will carry out maintenance at the third frequency; If the level of vulnerable areas is serious, the distribution network maintenance department will carry out maintenance at the fourth frequency; If the level of the vulnerable area is very serious, the maintenance department of the distribution network will perform maintenance at the fifth frequency; The first frequency is 1 time/60 days, the second frequency is 1 time/30 days, the third frequency is 1 time/15 days, the fourth frequency is 1 time/7 days, the The fifth frequency is 1 time/3 days. 7. A distribution network power outage risk assessment system, characterized in that, comprising, Data acquisition module: used to acquire the historical data of the power supply of the distribution network; Information collection module: used for correspondingly collecting outage information of the distribution network according to the historical data; Risk level evaluation module: according to the fault outage time and fault outage scope, the standard risk level is correspondingly divided; Matching module: used to match all causes of outages with standard risk levels one by one; Pre-warning module: used to give early warning according to the standard risk level corresponding to the cause of the outage when the cause of the outage occurs again. 8. A kind of distribution network blackout risk assessment system according to claim 7, is characterized in that, comprises: Vulnerable area division module: used to obtain the power supply area in the distribution network where the number of faults exceeds the threshold, record it as a vulnerable area, and correspond to the vulnerable area according to the number of power supply failures corresponding to the vulnerable area; Service life statistics module: according to the service life of the electric equipment and the predetermined design service life, it can remind the relevant maintainers to replace the electric equipment in time. 9. A computer device, comprising a memory and a processor, the memory stores a computer program, wherein the processor implements the method according to any one of claims 1 to 7 when executing the computer program step. 10. A computer-readable storage medium, on which a computer program is stored, 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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