Distribution network fault handling strategy generation method based on multi-dimensional factors

Abstract

The invention discloses a distribution network fault handling strategy generation method based on multidimensional factors, and relates to the technical field of distribution network faults. Comprising the following steps: S1, integrating and fusing multi-source data; s2, distribution network fault diagnosis analysis: calculating a distribution transformer load rate, and judging whether the distribution transformer is overloaded or not; and S3, generating a disposal strategy based on heavy overload. The multi-source data comprises file type data and operation type data, and the file type data comprises the operation age limit, the capacity, the model, the power supply radius, the phase and the longitude and latitude of the distribution transformer; the operation data comprises the operation current, the load rate and the defect of the distribution transformer. According to the method, in the working process, factors such as whether the power supply radius of the distribution transformer is too long or not, whether a distribution transformer body has problems or not, whether adjacent power supply points exist around or not and whether the adjacent power supply points meet load cutting conditions or not are comprehensively considered, the most accurate disposal strategy is finally formulated, and the reliability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution network faults, and in particular to a distribution network fault handling strategy generation method based on multi-dimensional factors. Background Art

[0002] The distribution network has the characteristics of wide coverage, large number of equipment types and quantities, and complex external influencing factors. With the large-scale access of distributed energy, the traditional radial distribution network will evolve into an active distribution network with bidirectional flow of current. However, the current distribution network management is difficult to adapt to the construction requirements of the new energy system and the new power system.

[0003] Traditional strategies for dealing with distribution network problems (i.e., overload of distribution transformers) mainly rely on grassroots frontline business personnel, who make decisions based on their own professional capabilities and field work experience, and lack scientific and systematic measurement models. Due to differences in the capabilities of business personnel, the strategies and plans formulated for similar problems may vary, resulting in large differences in the effectiveness of problem handling results.

[0004] Therefore, traditional manually formulated treatment strategies do not take all factors into consideration and are single-minded, resulting in inaccurate treatment strategies and low reliability. Summary of the invention

[0005] In view of the above problems, the present invention provides a method for generating a distribution network fault handling strategy based on multidimensional factors, which combines multidimensional heterogeneous business data of the distribution network to improve accuracy and reliability.

[0006] The technical solution of the present invention is: a method for generating a distribution network fault handling strategy based on multidimensional factors, comprising: S1. Multi-source data integration and fusion; S2. Distribution network fault diagnosis and analysis: calculate the distribution transformer load rate and determine whether the distribution transformer is severely overloaded; S3. Generate a disposal strategy based on heavy overload.

[0007] The multi-source data includes archival data and operation data, wherein the archival data includes the operation years, capacity, model, power supply radius, phase and longitude and latitude of the distribution transformer; the operation data includes the operating current, load rate and defects of the distribution transformer.

[0008] The calculation formula of the distribution transformer load rate is as follows: Distribution transformer load rate = maximum operating current / rated current*100%.

[0009] When determining whether the distribution transformer is severely overloaded, If the load factor of the distribution transformer is within the interval [80%, 100%) for 2 consecutive hours, the distribution transformer is judged to be overloaded; If the load factor of the distribution transformer is within the interval [100%, 150%] for 2 consecutive hours, the distribution transformer is considered to be overloaded; If the load factor of the distribution transformer exceeds 150%, it will be regarded as abnormal data and will not be counted as heavy overload.

[0010] Based on heavy overload, generate a disposal strategy, including: First, consider whether the distribution transformer power supply radius is too long. If so, make corrections simultaneously based on the power supply radius. Secondly, combined with the distribution transformer itself, if there is a problem with the distribution transformer itself, it needs to be rectified simultaneously; Then, it is necessary to consider the nearby power supply points around the heavily overloaded distribution transformer and whether there are other distribution transformers nearby that can provide supply; Finally, a solution to the problem of heavy overload of distribution transformer is given.

[0011] The algorithm for excessive power supply radius is: If the heavily overloaded distribution transformer power supply area is in area A, if the power supply radius is greater than 150 meters, the power supply radius is too long; If the heavily overloaded distribution transformer power supply area is in area B, if the power supply radius is greater than 250 meters, the power supply radius is too long; If the heavily overloaded distribution transformer power supply area is in Area C, if the power supply radius is greater than 450 meters, the power supply radius is too long; If the heavily overloaded distribution transformer power supply area is in area D, if the power supply radius is greater than 500 meters, the power supply radius is too long; The selection algorithm of adjacent power points is: If the power supply area of ​​the heavily overloaded distribution transformer is in area A, draw a circle with a radius of 50 meters outward from the heavily overloaded distribution transformer as the origin to find out whether there are other distribution transformers falling within the circle; If the heavily overloaded distribution transformer power supply area is in area B, take the heavily overloaded distribution transformer as the origin, draw a circle with a radius of 100 meters outward, and find out whether there are other distribution transformers falling within the circle; If the heavily overloaded distribution transformer power supply area is in area C, draw a circle with a radius of 150 meters outwards from the heavily overloaded distribution transformer as the origin to find out whether there are other distribution transformers falling within the circle; If the power supply area of ​​the heavily overloaded distribution transformer is in area D, draw a circle with a radius of 200 meters outward with the heavily overloaded distribution transformer as the origin, and look for other distribution transformers falling within the circle.

[0012] The criteria for judging the distribution transformer entity problem are: If the distribution transformer has been in operation for more than 15 years, it is considered old; If the distribution transformer model is less than S9, it is a high-energy consumption distribution transformer; The distribution transformer body has defects such as damage and aging.

[0013] If there are adjacent power sources around the heavily overloaded distribution transformer, and the load rate of the adjacent power sources is less than 30%, it is necessary to determine whether the load rates of the two distribution transformers are both below the standard value, that is, below 50%, after the adjacent power sources are connected to the heavily overloaded distribution transformer. Specific judgment: Is (the load value of the heavily overloaded distribution transformer + the load value of the adjacent distribution transformer) / (the capacity of the heavily overloaded distribution transformer + the capacity of the adjacent distribution transformer) < 50%?

[0014] The solutions to the distribution transformer overload problem include: ① If the power supply radius of the distribution transformer is too long and there are problems with the distribution transformer itself, and the adjacent distribution transformer meets the supply requirements, part of the load of the heavily overloaded distribution transformer will be cut to the adjacent distribution transformer, and the original heavily overloaded distribution transformer will be replaced with the original capacity and moved to meet the power supply radius requirements; ② If the distribution transformer power supply radius is too long and there are problems with the distribution transformer itself, but there are no other distribution transformers nearby or the nearby distribution transformers cannot meet the supply requirements, the heavily overloaded distribution transformer will be removed and replaced with a distribution transformer with a larger capacity, and the distribution transformer will be moved to the load center to meet the power supply radius requirements; if the distribution transformer is a pole-mounted transformer and its capacity has reached the maximum specification, a new distribution transformer will be added at this time. Considering the problem of the power supply radius being too long, the new distribution transformer will be closer to the load; at the same time, in order to deal with the problem of the heavily overloaded distribution transformer itself, the heavily overloaded distribution transformer needs to be replaced with the original capacity; ③ If the power supply radius of the distribution transformer is too long, there is no problem with the distribution transformer itself, and the adjacent distribution transformer meets the supply requirements, part of the load of the heavily overloaded distribution transformer will be cut to the adjacent distribution transformer, and the original heavily overloaded distribution transformer will be shifted to meet the power supply radius requirements; ④ If the power supply radius of the distribution transformer is too long, there is no problem with the distribution transformer itself, but there is no other distribution transformer nearby or the nearby distribution transformer cannot meet the supply requirements, the heavily overloaded distribution transformer will be removed and replaced with a distribution transformer with larger capacity, and the distribution transformer will be moved to the load center to meet the power supply radius requirements; if the distribution transformer is a pole-mounted transformer and its capacity has reached the maximum specification, a new distribution transformer will be added at this time. Considering the problem of excessive power supply radius, the new distribution transformer should be closer to the load.

[0015] The solutions to the distribution transformer overload problem also include: ⑤ If the distribution transformer does not have an overlong power supply radius problem, but has problems with the distribution transformer itself, and the adjacent distribution transformer meets the supply requirements, part of the load of the heavily overloaded distribution transformer will be cut to the adjacent distribution transformer, and the original heavily overloaded distribution transformer will be replaced with the original capacity at the original site; ⑥ If the distribution transformer does not have a problem with an overlong power supply radius, but there is a problem with the distribution transformer itself, but there is no other distribution transformer nearby or the nearby distribution transformer cannot meet the supply requirements, then the heavily overloaded distribution transformer will be removed and replaced with a distribution transformer with a larger capacity; if the distribution transformer is a pole-mounted transformer and its capacity has reached the maximum specification, then add a new distribution transformer; at the same time, in order to deal with the problem of the heavily overloaded distribution transformer itself, it is necessary to replace the heavily overloaded distribution transformer at the original site with the original capacity; ⑦ If the distribution transformer does not have an overlong power supply radius, there is no problem with the distribution transformer itself, and the adjacent distribution transformer meets the supply requirements, then part of the load of the heavily overloaded distribution transformer can be cut to the adjacent distribution transformer; ⑧ If the distribution transformer does not have the problem of excessive power supply radius, and there is no problem with the distribution transformer itself, but there is no other distribution transformer nearby or the nearby distribution transformer cannot meet the supply requirements, the heavily overloaded distribution transformer will be removed and replaced with a distribution transformer with larger capacity; if the distribution transformer is a pole-mounted transformer and its capacity has reached the maximum specification, a new distribution transformer will be added at this time.

[0016] During operation, the present invention takes into comprehensive consideration factors such as whether the power supply radius of the distribution transformer is too long, whether there are problems with the distribution transformer itself, whether there are nearby power supply points, and whether the nearby power supply points meet the load shedding conditions, and finally formulates the most accurate disposal strategy to improve reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation of the present invention or the technical solution in the prior art, the following briefly introduces the drawings required for the specific implementation or the prior art description. In the drawings, each part is not necessarily drawn according to the actual scale.

[0018] Figure 1 It is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0019] like Figure 1 As shown, the present invention provides a method for generating a distribution network fault handling strategy based on multidimensional factors, comprising: S1. Multi-source data integration and fusion; S2. Distribution network fault diagnosis and analysis: calculate the load rate of the distribution transformer and determine whether the distribution transformer is severely overloaded; S3. Generate a disposal strategy based on heavy overload.

[0020] When formulating a solution to the problem of excessive load rate of a distribution transformer, the present invention takes into account factors such as whether the distribution transformer has a too long power supply radius, whether there are problems with the distribution transformer itself (such as whether the equipment is old, whether there is a high-loss distribution transformer problem, whether there are defects and hidden dangers, whether failures occur frequently), whether there are nearby power points, and whether the nearby power points meet the load cutting conditions, and finally formulates the most accurate disposal strategy, such as cutting the load of the original distribution transformer to the nearby power point and migrating the distribution transformer position at the same time. In the past, when manually formulating disposal strategies, multiple factors were not considered, and the heavily overloaded distribution transformer was often directly replaced with the distribution transformer with the maximum capacity. Although such an inaccurate solution can solve the problem of heavy overload of the distribution transformer, it cannot solve other problems of the distribution transformer at the same time, such as low voltage caused by the long power supply radius.

[0021] Multi-source data include: Archival data include basic information such as the operating life, capacity, model, power supply radius, phase difference, longitude and latitude of the distribution transformer.

[0022] Operation data includes distribution transformer operating current, load factor, defects, faults, etc.

[0023] In the diagnosis of distribution network problems, the calculation of distribution transformer load factor includes: The load rate of the distribution transformer is calculated based on the operating current and rated current of the distribution transformer. Taking the three-phase distribution transformer as an example, the collection terminal installed on site collects the A, B, and C three-phase currents once every 15 minutes (i.e., one slice point), takes the operating current data of the largest phase among the three phases at each time point, and calculates the load rate of the distribution transformer in combination with the rated current of the distribution transformer. The calculation formula is as follows: Distribution transformer load rate = maximum operating current / rated current*100%.

[0024] In the diagnosis of distribution network problems, the following are used to determine whether the distribution transformer is severely overloaded: When determining whether the distribution transformer is severely overloaded, single-phase current calculation is used, and the calculation rule of 9 consecutive slice points (2 consecutive hours) is added. If the distribution transformer load rate is within the interval [80%, 100%) for 2 consecutive hours, the distribution transformer is determined to be heavily loaded; if the distribution transformer load rate is within the interval [100%, 150%] for 2 consecutive hours, the distribution transformer is determined to be overloaded. If the distribution transformer load rate exceeds 150%, it is regarded as abnormal data and is not counted as severely overloaded.

[0025] (1) During the calculation process, it is necessary to eliminate abnormal operating current points that exceed the rated current by 1.5 times or more. When determining heavy load or overload, first determine whether the distribution transformer is overloaded. If the distribution transformer load rate is within the range of [100%, 150%] for 2 consecutive hours, it is determined to be overloaded. If it does not meet the overload condition, then determine whether the distribution transformer is overloaded.

[0026] (2) Calculate the rated current of the distribution transformer based on the distribution transformer capacity, distribution transformer model, and distribution transformer type. The rated current of a three-phase distribution transformer = the rated capacity of the distribution transformer * [1 / (0.4*root 3)] (generally 1.44); the rated current of a single-phase distribution transformer is the rated capacity of the distribution transformer * [1 / 0.22] (generally 4.545).

[0027] Formulate problem handling strategy: When a distribution transformer has a severe overload problem, generate a handling strategy for the severe overload problem.

[0028] Specifically include: First, consider whether the distribution transformer power supply radius is too long. If the power supply radius is too long, when solving the problem of heavy overload of distribution transformer, it is necessary to combine the power supply radius and make rectifications simultaneously. For example, when cutting loads, give priority to the load farthest from the power supply point. The algorithm for excessive power supply radius is as follows: If the power supply area of ​​the heavy overload distribution transformer is in area A, if the power supply radius is greater than 150 meters, the power supply radius is too long. If the power supply area of ​​the heavy overload distribution transformer is in area B, if the power supply radius is greater than 250 meters, the power supply radius is too long. If the power supply area of ​​the heavy overload distribution transformer is in area C, if the power supply radius is greater than 450 meters, the power supply radius is too long. If the power supply area of ​​the heavy overload distribution transformer is in area D, if the power supply radius is greater than 500 meters, the power supply radius is too long.

[0029] Secondly, combined with the distribution transformer body problems, if the body has problems such as too long operation life, high energy consumption model, body defects, etc., then when solving the problem of heavy overload of the distribution transformer, it is necessary to carry out rectification at the same time, such as dismantling the problematic distribution transformer and replacing it with a large-capacity distribution transformer. The judgment criteria for the distribution transformer body problems are: ① If the distribution transformer is a single-phase transformer, it needs to be replaced. ② If the distribution transformer has been in operation for more than 15 years, it is judged that the distribution transformer is old and needs to be replaced. ③ If the distribution transformer model is <S9, it is a high-energy consumption distribution transformer and needs to be replaced. ④ If the distribution transformer body has body defects such as damage and aging, it needs to be replaced.

[0030] Then, it is necessary to consider the nearby power supply points around the heavily overloaded distribution transformer and whether there are other distribution transformers nearby that can provide supply.

[0031] The selection algorithm for adjacent power supply points is as follows: If the heavily overloaded distribution transformer power supply area is in area A, take the heavily overloaded distribution transformer as the origin, draw a circle with a radius of 50 meters outward, and find out whether there are other distribution transformers falling within the circle. If the heavily overloaded distribution transformer power supply area is in area B, take the heavily overloaded distribution transformer as the origin, draw a circle with a radius of 100 meters outward, and find out whether there are other distribution transformers falling within the circle. If the heavily overloaded distribution transformer power supply area is in area C, take the heavily overloaded distribution transformer as the origin, draw a circle with a radius of 150 meters outward, and find out whether there are other distribution transformers falling within the circle. If the heavily overloaded distribution transformer power supply area is in area D, take the heavily overloaded distribution transformer as the origin, draw a circle with a radius of 200 meters outward, and find out whether there are other distribution transformers falling within the circle.

[0032] If there is an adjacent power source around the heavily overloaded distribution transformer, and the load rate of the adjacent power source is less than 30%, it is necessary to determine whether the load rates of the two distribution transformers are below the standard value, that is, below 50%, after the adjacent power source is connected to the heavily overloaded distribution transformer. Is (the load value of the heavily overloaded distribution transformer + the load value of the adjacent distribution transformer) / (the capacity of the heavily overloaded distribution transformer + the capacity of the adjacent distribution transformer) < 50%?

[0033] Note: 50% is the load rate of the distribution transformer during normal operation. When load shedding is performed, it is necessary to consider the distribution transformer that receives the load and the distribution transformer that is shedding the load. After adjustment, the load rate is controlled within an appropriate range.

[0034] Finally, a solution to the problem of heavy overload of distribution transformer is given.

[0035] The specific solutions for the distribution transformer overload problem include the following: ① If the power supply radius of the distribution transformer is too long and there are problems with the distribution transformer itself, and the adjacent distribution transformer meets the supply requirements, part of the load of the heavily overloaded distribution transformer will be cut to the adjacent distribution transformer, and the original heavily overloaded distribution transformer will be replaced with the original capacity and moved to meet the power supply radius requirements.

[0036] ② If the distribution transformer power supply radius is too long and there are problems with the distribution transformer itself, but there are no other distribution transformers nearby or the nearby distribution transformers cannot meet the supply requirements, the heavily overloaded distribution transformer will be removed and replaced with a larger capacity distribution transformer, and the distribution transformer will be moved to the load center to meet the power supply radius requirements. If the distribution transformer is a pole-mounted transformer and the capacity has reached the maximum specification of 400kVA, and there are no larger capacity distribution transformers, then a new distribution transformer will be added. Considering the problem of the power supply radius being too long, the new distribution transformer will be closer to the load. At the same time, in order to deal with the problem of the heavily overloaded distribution transformer itself, it is necessary to replace the heavily overloaded distribution transformer with the original capacity.

[0037] ③ If the power supply radius of the distribution transformer is too long, there is no problem with the distribution transformer itself, and the adjacent distribution transformer meets the supply requirements, part of the load of the heavily overloaded distribution transformer will be cut to the adjacent distribution transformer, and the original heavily overloaded distribution transformer will be shifted to meet the power supply radius requirements.

[0038] ④ If the distribution transformer power supply radius is too long, there is no problem with the distribution transformer itself, but there is no other distribution transformer nearby or the nearby distribution transformer cannot meet the supply requirements, then the heavily overloaded distribution transformer will be removed and replaced with a larger capacity distribution transformer, and the distribution transformer will be moved to the load center to meet the power supply radius requirements. If the distribution transformer is a pole-mounted transformer and its capacity has reached the maximum specification of 400kVA, and there is no larger capacity distribution transformer, then a new distribution transformer will be added at this time. Considering the problem of too long power supply radius, the new distribution transformer should be closer to the load.

[0039] ⑤ If the distribution transformer does not have the problem of excessive power supply radius, but there is a problem with the distribution transformer itself, and the adjacent distribution transformer meets the supply requirements, part of the load of the heavily overloaded distribution transformer will be cut to the adjacent distribution transformer, and the original heavily overloaded distribution transformer will be replaced at the original site with the original capacity.

[0040] ⑥ If the distribution transformer does not have a problem with an overlong power supply radius, but there is a problem with the distribution transformer itself, but there is no other distribution transformer nearby or the nearby distribution transformer cannot meet the supply requirements, the heavily overloaded distribution transformer will be removed and replaced with a distribution transformer with a larger capacity. If the distribution transformer is a pole-mounted transformer and its capacity has reached the maximum specification of 400kVA, and there is no larger capacity distribution transformer, then a new distribution transformer will be added. At the same time, in order to deal with the problem of the heavily overloaded distribution transformer itself, it is necessary to replace the heavily overloaded distribution transformer at the original site with the original capacity.

[0041] ⑦ If the distribution transformer does not have the problem of excessive power supply radius, there is no problem with the distribution transformer itself, and the adjacent distribution transformer meets the supply requirements, then part of the load of the heavily overloaded distribution transformer can be cut to the adjacent distribution transformer.

[0042] ⑧ If the distribution transformer does not have an overlong power supply radius, and there is no problem with the distribution transformer itself, but there is no other distribution transformer nearby or the nearby distribution transformer cannot meet the supply requirements, the heavily overloaded distribution transformer will be removed and replaced with a larger capacity distribution transformer. If the distribution transformer is a pole-mounted transformer and its capacity has reached the maximum specification of 400kVA, and there is no larger capacity distribution transformer, then add a new distribution transformer.

[0043] The specific examples are as follows: Taking the heavy overload problem of the 2# comprehensive transformer in Jinjia Group, Lianfeng Village, Fanchuan Town, Jiangdu District, Yangzhou as an example, the distribution transformer was overloaded at 11:45 on August 9, 2024, and the load rate reached 109.79%. Analysis shows that the distribution transformer belongs to the power supply area C, and its power supply radius is 365.4 meters, so there is no problem of too long power supply radius. The distribution transformer is in good operating condition, and there is no problem with the equipment itself. Looking for surrounding power supply points, it was found that the nearest distribution transformer was the comprehensive transformer in Jinjia Group, Lianfeng Village, Fanchuan Town, which was 602 meters away from the heavy overload distribution transformer. The distance was far and did not meet the conditions for low-voltage load cutting. Finally, based on the strategy for handling the heavy overload problem of the distribution transformer, a comprehensive disposal plan was given to expand the capacity of the heavy overload distribution transformer on site from the original 200kVA to 400kVA.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for generating a distribution network fault handling strategy based on multidimensional factors, characterized in that: include: S1. Multi-source data integration and fusion; S2. Distribution network fault diagnosis and analysis: calculate the load rate of the distribution transformer and determine whether the distribution transformer is severely overloaded; S3. Generate a disposal strategy based on heavy overload.

2. A method for generating a distribution network fault handling strategy based on multidimensional factors according to claim 1, characterized in that: The multi-source data includes archival data and operation data, wherein the archival data includes the operation years, capacity, model, power supply radius, phase and longitude and latitude of the distribution transformer; the operation data includes the operating current, load rate and defects of the distribution transformer.

3. A method for generating a distribution network fault handling strategy based on multidimensional factors according to claim 1, characterized in that: The calculation formula of the distribution transformer load rate is as follows: Distribution transformer load rate = maximum operating current / rated current*100%.

4. A method for generating a distribution network fault handling strategy based on multidimensional factors according to claim 3, characterized in that: When determining whether the distribution transformer is severely overloaded, If the load factor of the distribution transformer is within the interval [80%, 100%) for 2 consecutive hours, the distribution transformer is judged to be overloaded; If the load factor of the distribution transformer is within the interval [100%, 150%] for 2 consecutive hours, the distribution transformer is considered to be overloaded; If the load factor of the distribution transformer exceeds 150%, it will be regarded as abnormal data and will not be counted as heavy overload.

5. The method for generating a distribution network fault handling strategy based on multidimensional factors according to claim 1, characterized in that: Based on heavy overload, generate a disposal strategy, including: First, check whether the distribution transformer power supply radius is too long. If so, make corrections simultaneously with the power supply radius. Secondly, combined with the distribution transformer itself, if there is a problem with the distribution transformer itself, it needs to be rectified simultaneously; Then, it is necessary to consider the nearby power supply points around the heavily overloaded distribution transformer and whether there are other distribution transformers nearby that can provide power; Finally, a solution to the problem of heavy overload of distribution transformer is given.

6. A method for generating a distribution network fault handling strategy based on multidimensional factors according to claim 1, characterized in that: The algorithm for excessive power supply radius is: If the heavily overloaded distribution transformer power supply area is in area A, if the power supply radius is greater than 150 meters, the power supply radius is too long; If the heavily overloaded distribution transformer power supply area is in area B, if the power supply radius is greater than 250 meters, the power supply radius is too long; If the heavily overloaded distribution transformer power supply area is in Area C, if the power supply radius is greater than 450 meters, the power supply radius is too long; If the heavily overloaded distribution transformer power supply area is in area D, if the power supply radius is greater than 500 meters, the power supply radius is too long; The selection algorithm of adjacent power points is: If the power supply area of ​​the heavily overloaded distribution transformer is in area A, draw a circle with a radius of 50 meters outward from the heavily overloaded distribution transformer as the origin to find out whether there are other distribution transformers falling within the circle; If the heavily overloaded distribution transformer power supply area is in area B, take the heavily overloaded distribution transformer as the origin, draw a circle with a radius of 100 meters outward, and find out whether there are other distribution transformers falling within the circle; If the heavily overloaded distribution transformer power supply area is in area C, draw a circle with a radius of 150 meters outwards from the heavily overloaded distribution transformer as the origin to find out whether there are other distribution transformers falling within the circle; If the power supply area of ​​the heavily overloaded distribution transformer is in area D, draw a circle with a radius of 200 meters outward with the heavily overloaded distribution transformer as the origin, and look for other distribution transformers falling within the circle.

7. A method for generating a distribution network fault handling strategy based on multidimensional factors according to claim 1, characterized in that: The criteria for judging the distribution transformer entity problem are: If the distribution transformer has been in operation for more than 15 years, it is considered old; If the distribution transformer model is less than S9, it is a high-energy consumption distribution transformer; The distribution transformer body has defects such as damage and aging.

8. The method for generating a distribution network fault handling strategy based on multidimensional factors according to claim 1, characterized in that: If there is an adjacent power source around the heavily overloaded distribution transformer, and the load rate of the adjacent power source is less than 30%, it is necessary to determine whether the load rates of the two distribution transformers are both below the standard value, that is, below 50%, after the adjacent power source is connected to the heavily overloaded distribution transformer; Specific judgment: Is (the load value of the heavily overloaded distribution transformer + the load value of the adjacent distribution transformer) / (the capacity of the heavily overloaded distribution transformer + the capacity of the adjacent distribution transformer) < 50%? 9. The method for generating a distribution network fault handling strategy based on multidimensional factors according to claim 1, characterized in that: The solutions to the distribution transformer overload problem include: ① If the power supply radius of the distribution transformer is too long and there are problems with the distribution transformer itself, and the adjacent distribution transformer meets the supply requirements, part of the load of the heavily overloaded distribution transformer will be cut to the adjacent distribution transformer, and the original heavily overloaded distribution transformer will be replaced with the original capacity and moved to meet the power supply radius requirements; ② If the distribution transformer power supply radius is too long and there are problems with the distribution transformer itself, but there are no other distribution transformers nearby or the nearby distribution transformers cannot meet the supply requirements, the heavily overloaded distribution transformer will be removed and replaced with a distribution transformer with a larger capacity, and the distribution transformer will be moved to the load center to meet the power supply radius requirements; if the distribution transformer is a pole-mounted transformer and its capacity has reached the maximum specification, a new distribution transformer will be added at this time. Considering the problem of the power supply radius being too long, the new distribution transformer will be closer to the load; at the same time, in order to deal with the problem of the heavily overloaded distribution transformer itself, the heavily overloaded distribution transformer needs to be replaced with the original capacity; ③ If the power supply radius of the distribution transformer is too long, there is no problem with the distribution transformer itself, and the adjacent distribution transformer meets the supply requirements, part of the load of the heavily overloaded distribution transformer will be cut to the adjacent distribution transformer, and the original heavily overloaded distribution transformer will be shifted to meet the power supply radius requirements; ④ If the power supply radius of the distribution transformer is too long, there is no problem with the distribution transformer itself, but there is no other distribution transformer nearby or the nearby distribution transformer cannot meet the supply requirements, the heavily overloaded distribution transformer will be removed and replaced with a distribution transformer with larger capacity, and the distribution transformer will be moved to the load center to meet the power supply radius requirements; if the distribution transformer is a pole-mounted transformer and its capacity has reached the maximum specification, a new distribution transformer will be added at this time. Considering the problem of excessive power supply radius, the new distribution transformer should be closer to the load.

10. The method for generating a distribution network fault handling strategy based on multidimensional factors according to claim 1, characterized in that: The solutions to the distribution transformer overload problem also include: ⑤ If the distribution transformer does not have an overlong power supply radius problem, but has problems with the distribution transformer itself, and the adjacent distribution transformer meets the supply requirements, part of the load of the heavily overloaded distribution transformer will be cut to the adjacent distribution transformer, and the original heavily overloaded distribution transformer will be replaced with the original capacity at the original site; ⑥ If the distribution transformer does not have a problem with an overlong power supply radius, but there is a problem with the distribution transformer itself, but there is no other distribution transformer nearby or the nearby distribution transformer cannot meet the supply requirements, then the heavily overloaded distribution transformer will be removed and replaced with a distribution transformer with a larger capacity; if the distribution transformer is a pole-mounted transformer and its capacity has reached the maximum specification, then add a new distribution transformer; at the same time, in order to deal with the problem of the heavily overloaded distribution transformer itself, it is necessary to replace the heavily overloaded distribution transformer at the original site with the original capacity; ⑦ If the distribution transformer does not have an overlong power supply radius, there is no problem with the distribution transformer itself, and the adjacent distribution transformer meets the supply requirements, then part of the load of the heavily overloaded distribution transformer can be cut to the adjacent distribution transformer; ⑧ If the distribution transformer does not have the problem of excessive power supply radius, and there is no problem with the distribution transformer itself, but there is no other distribution transformer nearby or the nearby distribution transformer cannot meet the supply requirements, the heavily overloaded distribution transformer will be removed and replaced with a distribution transformer with larger capacity; if the distribution transformer is a pole-mounted transformer and its capacity has reached the maximum specification, a new distribution transformer will be added at this time.

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