An intelligent detection and early warning method for urban power distribution cable faults

Abstract

The present invention provides an intelligent detection and early warning method for urban power distribution cable faults, which belongs to the technical field of alarm devices, and specifically comprises: obtaining line loss data of cables in cable trenches in different transmission power intervals based on a line loss risk analysis cycle, and determining that when a cable damage risk assessment amount does not meet the requirements based on the line loss data of the cables in different transmission power intervals and changes in the line loss data, the historical transmission power of the cables and the power users supplied are obtained, and whether it is necessary to output an early warning signal is determined in combination with the vibration damage risk of the cables and the damage risk assessment amount, thereby ensuring the reliability of the cable operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of alarm devices, and in particular relates to an intelligent detection and early warning method for urban power distribution cable faults. Background Art

[0002] In order to ensure the cleanliness of the city and the safety of power supply, the existing urban distribution network often supplies power through distribution cables. As the service life increases, the distribution cables will inevitably age. At the same time, since the distribution cables are generally placed in underground cable trenches, the inspection and maintenance are difficult. Therefore, how to realize fault detection of distribution cables and output targeted early warning signals has become a technical problem that needs to be solved urgently.

[0003] In order to solve the above technical problems, the existing technical solution in the invention patent CN202210707741.8 "Online monitoring system for preventing external damage of cable channels based on distributed optical fiber vibration sensing" analyzes the vibration change information and tension change information of each cable section in the target area, thereby determining the external damage index of each cable section in the target area and whether there is damage, thereby improving the power supply reliability of the cable. However, it is not difficult to find out through analysis that there are the following technical problems:

[0004] Since the length and distribution of urban power supply cables are relatively complex, when the cables are broken or damaged, the line loss of the cables will inevitably change to a certain extent. Therefore, if the power supply cables with a higher probability of damage cannot be screened based on the changes in line loss, the reliability of the early warning processing cannot be guaranteed.

[0005] In view of the above technical problems, the present invention provides an intelligent detection and early warning method for urban power distribution cable faults. Summary of the invention

[0006] To achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0007] According to one aspect of the present invention, a method for intelligent detection and early warning of urban power distribution cable faults is provided.

[0008] An intelligent detection and early warning method for urban power distribution cable faults, characterized by comprising:

[0009] S1 obtains precipitation data of different cable trenches within a preset time period, and determines the damage risk analysis period of cables in different cable trenches based on the precipitation data and historical water accumulation data of the cable trenches under different historical precipitation data;

[0010] S2: acquiring line loss data of the cables in the cable trench in different transmission power intervals based on the line loss risk analysis cycle, and determining that the damage risk assessment amount of the cables does not meet the requirements according to the line loss data of the cables in different transmission power intervals and the changes in the line loss data, and proceeding to the next step;

[0011] S3 determines the vibration characteristic quantities of different transmission power intervals through the vibration data of the cable in different transmission power intervals, and determines the vibration damage risk of the cable in combination with the correlation coefficient of the different vibration characteristic quantities and the damage severity of the cable. When the vibration damage risk of the cable does not meet the requirements, proceed to the next step;

[0012] S4 obtains the historical transmission power of the cable and the power users supplied, and determines whether it is necessary to output a warning signal in combination with the vibration damage risk of the cable and the damage risk assessment amount.

[0013] The beneficial effects of the present invention are:

[0014] 1. Based on precipitation data and historical water accumulation data of cable trenches under different historical precipitation data, the damage risk analysis period of cables in different cable trenches is determined, thereby realizing accurate assessment of cable water accumulation risk from the perspective of precipitation data and historical water accumulation data, improving the efficiency of analysis and processing of damage risks of cables with higher water accumulation risks, and ensuring the safety and reliability of cable operation.

[0015] 2. Determine whether to output an early warning signal based on the historical transmission power of the cable, the number of power users supplied, the vibration damage risk of the cable and the damage risk assessment. This not only takes into account the differences in the damage risk requirements of the cable due to differences in transmission power and the number of power users supplied, but also takes into account the differences in the probability of damage risk caused by differences in the vibration damage risk of the cable and the damage risk assessment. This ensures the safety of cable operation and realizes the output of early warning signals for cables with a higher risk of damage.

[0016] A further technical solution is that the preset time is determined based on historical water accumulation data of different cable trenches, wherein the more cable trenches with water accumulation there are, the longer the preset time is.

[0017] A further technical solution is that the preset time ranges from 3 days to one week.

[0018] A further technical solution is that the vibration damage risk of the cable ranges from 0 to 1, wherein when the vibration damage risk of the cable is greater than a preset risk value, it is determined that the vibration damage risk of the cable does not meet the requirements.

[0019] A further technical solution is that when the vibration damage risk of the cable meets the requirement, there is no need to output a warning signal.

[0020] A further technical solution is to determine whether it is necessary to output a warning signal, specifically including:

[0021] Determining a comprehensive damage risk assessment amount of the cable according to the vibration damage risk of the cable and the damage risk assessment amount;

[0022] A damage risk threshold is determined based on the historical transmission power of the cable and the number of power users supplied, and whether an early warning signal needs to be output is determined based on the damage risk threshold and the comprehensive damage risk assessment.

[0023] On the other hand, the present invention provides a computer system, comprising: a memory and a processor connected in communication, and a computer program stored in the memory and capable of running on the processor, characterized in that: when the processor runs the computer program, it executes the above-mentioned method for intelligent detection and early warning of urban distribution cable faults.

[0024] Other features and advantages will be described in the following description, and partly become apparent from the description, or understood by practicing the invention. The purpose and other advantages of the invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

[0027] Figure 1 It is a flow chart of an intelligent detection and early warning method for urban power distribution cable faults;

[0028] Figure 2 It is a flow chart of a method for determining a damage risk analysis cycle of cables in a cable trench;

[0029] Figure 3 It is a flow chart of a method for determining the vibration damage risk of a cable. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0031] For ease of understanding, the scheme will be described below through Example 1 and Example 2.

[0032] Example 1

[0033] To solve the above problems, according to one aspect of the present invention, Figure 1 According to one aspect of the present invention, a method for intelligent detection and early warning of urban power distribution cable faults is provided, which is characterized by specifically comprising:

[0034] S1 obtains precipitation data of different cable trenches within a preset time period, and determines the damage risk analysis period of cables in different cable trenches based on the precipitation data and historical water accumulation data of the cable trenches under different historical precipitation data;

[0035] Specifically, the preset time is determined according to historical water accumulation data of different cable trenches, wherein the more cable trenches with water accumulation there are, the longer the preset time is.

[0036] Furthermore, the preset time ranges from 3 days to one week.

[0037] Specifically, Figure 2 As shown, the method for determining the damage risk analysis period of the cables in the cable trench is:

[0038] Determine the rainfall amount in different divided time periods in the area where the cable trench is located within a preset time according to the rainfall data, and determine the rainfall similarity with different historical precipitation times according to the rainfall amount in different divided time periods in the area where the cable trench is located within the preset time and historical precipitation data;

[0039] Determine similar precipitation times in the historical precipitation times based on precipitation similarities with different historical precipitation times, and determine the water accumulation risk value of the cable trench through historical water accumulation data of different similar precipitation times and precipitation similarities;

[0040] The damage risk analysis period of the cable is determined by the water accumulation risk value of the cable trench.

[0041] It should be noted that the damage risk analysis period of the cable is determined by the water accumulation risk value of the cable trench, which specifically includes:

[0042] The matching water accumulation risk interval of the cable trench is determined according to the water accumulation risk value of the cable trench, and the damage risk analysis period of the cable is determined based on the matching analysis period of the water accumulation risk interval.

[0043] In another embodiment, the method for determining the damage risk analysis period of the cables in the cable trench is:

[0044] Determine the rainfall amount in different divided time periods in the area where the cable trench is located within a preset time according to the precipitation data, and judge whether the total rainfall amount in the area where the cable trench is located within the preset time meets the requirement, if so, proceed to the next step, if not, determine the damage risk analysis period of the cable in the cable trench based on the preset analysis period;

[0045] The divided time periods in which the rainfall does not meet the requirements are regarded as heavy rainfall periods, and it is determined whether the number of the heavy rainfall periods meets the requirements. If so, the next step is entered; if not, the damage risk analysis period of the cable in the cable trench is determined based on a preset analysis period;

[0046] Determine the precipitation similarity with different historical precipitation times according to the rainfall in different divided time periods in the area where the cable trench is located within the preset time and the historical precipitation data, determine similar precipitation times in the historical precipitation times based on the precipitation similarity with different historical precipitation times, and judge whether the historical waterlogging times in the similar precipitation times meet the requirements, if so, proceed to the next step, if not, determine the damage risk analysis period of the cable in the cable trench based on the preset analysis period;

[0047] The water accumulation risk value of the cable trench is determined by using historical water accumulation data of different similar precipitation times and precipitation similarity, and the damage risk analysis period of the cable is determined by using the water accumulation risk value of the cable trench.

[0048] In another embodiment, the method for determining the damage risk analysis period of the cables in the cable trench is:

[0049] S11 determines whether there is rainfall in the area where the cable trench is located within a preset time according to the precipitation data, and if so, proceeds to the next step, and if not, determines a damage risk analysis period for the cables in the cable trench according to a second preset analysis period;

[0050] S12 determines the rainfall in different divided time periods in the area where the cable trench is located within the preset time according to the precipitation data, and judges whether the number of divided time periods with rainfall is less than the preset number of time periods. If so, proceed to the next step; if not, proceed to step S14;

[0051] S13 determines whether the total rainfall in the divided time periods where the cable trench is located is less than a preset rainfall threshold, if so, determines the damage risk analysis period of the cable in the cable trench according to the second preset analysis period, if not, proceeds to the next step;

[0052] S14 determines whether the total rainfall in the area where the cable trench is located within a preset time meets the requirement, if so, proceeds to the next step, if not, determines the damage risk analysis period of the cable in the cable trench based on the preset analysis period;

[0053] S15 determines the precipitation similarity with different historical precipitation times according to the rainfall in different divided time periods in the area where the cable trench is located within a preset time and the historical precipitation data, determines the water accumulation risk value of the cable trench through the historical water accumulation data of different similar precipitation times and the precipitation similarity, and determines the damage risk analysis period of the cable through the water accumulation risk value of the cable trench.

[0054] S2: acquiring line loss data of the cables in the cable trench in different transmission power intervals based on the line loss risk analysis cycle, and determining that the damage risk assessment amount of the cables does not meet the requirements according to the line loss data of the cables in different transmission power intervals and the changes in the line loss data, and proceeding to the next step;

[0055] Furthermore, the transmission power interval is divided according to a preset power interval and a historical transmission power range of the cable.

[0056] It should be noted that the line loss data includes line loss amount and line loss percentage.

[0057] Specifically, determining that the damage risk assessment amount of the cable does not meet the requirements specifically includes:

[0058] Determine the variation range of the line loss amount and line loss percentage of the cable in different transmission power intervals through the line loss data of the cable in different transmission power intervals, and determine the line loss abnormal values ​​in different transmission power intervals in combination with the corresponding time lengths of different line loss amounts and the corresponding time lengths of line loss percentages in different distribution intervals;

[0059] Determine the variation data of the line loss amount in different unit time lengths according to the line loss data of the cable in different transmission power intervals, and determine the number of changes of the line loss amount in different unit time lengths and the variation of the line loss amount at different variation times based on the variation data, and determine the abnormal value of the line loss variation of the cable in different transmission power intervals in combination with the number of changes in which the variation percentage of the line loss amount does not meet the requirement;

[0060] The operating time of the cable in different transmission power intervals is obtained, and the damage risk assessment of the cable is determined in combination with the line loss change abnormal values ​​and line loss abnormal values ​​of the cable in different transmission power intervals. The damage risk assessment of the cable is determined whether it meets the requirements through the line loss abnormal assessment value and the preset abnormal threshold.

[0061] In another embodiment, determining that the damage risk assessment amount of the cable does not meet the requirement specifically includes:

[0062] S21 determines the variation range of the line loss amount and line loss percentage of the cable in different transmission power intervals through the line loss data of the cable in different transmission power intervals, and determines whether there is a transmission power interval in which the variation range of the line loss amount and line loss percentage does not meet the requirements based on the distribution data, if so, proceeds to step, if not, proceeds to the next step;

[0063] S22 determines the change data of the line loss amount in different unit time lengths according to the line loss data of the cable in different transmission power intervals, and judges whether there is a change number of line loss amount that does not meet the requirements, if so, proceeds to the next step, if not, determines that the damage risk assessment amount of the cable meets the requirements;

[0064] S23 determines abnormal line loss values ​​in different transmission power intervals according to the variation range of the line loss amount and line loss percentage of the cable in different transmission power intervals, the corresponding time lengths of different line loss amounts in different distribution intervals, and the corresponding time lengths of line loss percentages;

[0065] S24 determines the variation data of the line loss amount in different unit time lengths according to the line loss data of the cable in different transmission power intervals, and determines the number of changes of the line loss amount in different unit time lengths and the variation of the line loss amount at different variation times based on the variation data, and determines the abnormal value of the line loss variation of the cable in different transmission power intervals in combination with the number of changes in which the variation percentage of the line loss amount does not meet the requirement;

[0066] S25 obtains the operating time of the cable in different transmission power intervals, and determines the damage risk assessment of the cable in combination with the line loss change abnormal value and the line loss abnormal value of the cable in different transmission power intervals, and determines whether the damage risk assessment of the cable meets the requirements through the line loss abnormal assessment value and the preset abnormal threshold.

[0067] In another embodiment, determining that the damage risk assessment amount of the cable does not meet the requirement specifically includes:

[0068] S221 determines the variation range of the line loss amount and line loss percentage of the cable in different transmission power intervals through the line loss data of the cable in different transmission power intervals, and determines the line loss abnormal values ​​of different transmission power intervals through the variation range of the line loss amount and line loss percentage of the cable in different transmission power intervals, the corresponding time lengths of different line loss amounts in different distribution intervals, and the corresponding time lengths of line loss percentages, and determines whether there is a transmission power interval where the line loss abnormal value does not meet the requirements, if yes, proceeds to step S223, if not, proceeds to the next step;

[0069] S222 determines the variation data of the line loss amount in different unit time lengths according to the line loss data of the cable in different transmission power intervals, and determines the number of changes of the line loss amount in different unit time lengths and the variation of the line loss amount at different variation times based on the variation data, and determines the abnormal line loss variation value of the cable in different transmission power intervals in combination with the number of changes in which the variation percentage of the line loss amount does not meet the requirement, and determines whether there is a transmission power interval in which the abnormal line loss variation value does not meet the requirement, if so, proceeds to the next step, if not, determines that the damage risk assessment amount of the cable meets the requirement;

[0070] S223: obtaining the number of transmission power intervals where the line loss abnormal value does not meet the requirements and the line loss abnormal values ​​of the transmission power intervals where different line loss abnormal values ​​do not meet the requirements, and determining the screening line loss abnormal value of the cable in combination with the number of transmission power intervals where the line loss variation abnormal value does not meet the requirements and the line loss variation abnormal values ​​of the transmission power intervals where different line loss variations do not meet the requirements, and judging whether the screening line loss abnormal value of the cable meets the requirements, if so, determining that the damage risk assessment amount of the cable meets the requirements, if not, proceeding to the next step;

[0071] S25 obtains the operating time of the cable in different transmission power intervals, and determines the damage risk assessment of the cable in combination with the line loss change abnormal value and the line loss abnormal value of the cable in different transmission power intervals, and determines whether the damage risk assessment of the cable meets the requirements through the line loss abnormal assessment value and the preset abnormal threshold.

[0072] Specifically, when the damage risk assessment value of the cable meets the requirement, it is determined that there is no need to output a warning signal.

[0073] S3 determines the vibration characteristic quantities of different transmission power intervals through the vibration data of the cable in different transmission power intervals, and determines the vibration damage risk of the cable in combination with the correlation coefficient of the different vibration characteristic quantities and the damage severity of the cable. When the vibration damage risk of the cable does not meet the requirements, proceed to the next step;

[0074] Specifically, Figure 3 As shown, the method for determining the vibration damage risk of the cable is:

[0075] Determining the vibration damage risk of the cable in different transmission power intervals based on the vibration characteristic quantities in different transmission power intervals and the correlation coefficients between the different vibration characteristic quantities and the damage severity of the cable;

[0076] The operating time of the cable in different transmission power intervals is obtained, and the vibration damage risk of the cable is determined in combination with the interval vibration damage risk of the cable in different transmission power intervals.

[0077] Furthermore, the vibration damage risk of the cable ranges from 0 to 1, wherein when the vibration damage risk of the cable is greater than a preset risk value, it is determined that the vibration damage risk of the cable does not meet the requirement.

[0078] Specifically, when the vibration damage risk of the cable meets the requirement, there is no need to output a warning signal.

[0079] In another embodiment, the method for determining the vibration damage risk of the cable is:

[0080] S31 divides the transmission power interval into a frequent working power interval and other working power intervals according to the operation time of the cable in different transmission power intervals;

[0081] S32 determines the interval vibration damage risk of the cable in different frequent working power intervals through the vibration characteristic quantities of different frequent working power intervals and the correlation coefficient between the different vibration characteristic quantities and the damage severity of the cable, and judges whether there is a frequent working power interval where the interval vibration damage risk does not meet the requirements, if so, proceeds to step S34, if not, proceeds to the next step;

[0082] S33 determines the interval vibration damage risk of the cable in different other working power intervals through the vibration characteristic quantities of different other working power intervals and the correlation coefficient between the different vibration characteristic quantities and the damage severity of the cable, and judges whether there are other working power intervals whose interval vibration damage risk does not meet the requirements. If so, proceed to step S34; if not, determine that the vibration damage risk of the cable meets the requirements;

[0083] S34 takes other working power intervals whose interval vibration damage risk does not meet the requirements as problem working power intervals, and determines the comprehensive vibration damage risk assessment amount of the problem working power interval according to the interval vibration damage risk of different problem working power intervals and the number of problem working power intervals, and judges whether the comprehensive vibration damage risk assessment amount of the problem working power interval meets the requirements. If so, it is determined that the vibration damage risk of the cable meets the requirements, if not, proceeds to the next step;

[0084] S35 obtains the operating time of the cable in different transmission power intervals, and determines the vibration damage risk of the cable in combination with the interval vibration damage risk of the cable in different transmission power intervals.

[0085] S4 obtains the historical transmission power of the cable and the power users supplied, and determines whether it is necessary to output a warning signal in combination with the vibration damage risk of the cable and the damage risk assessment amount.

[0086] Further, it is determined whether it is necessary to output a warning signal, including:

[0087] Determining a comprehensive damage risk assessment amount of the cable according to the vibration damage risk of the cable and the damage risk assessment amount;

[0088] A damage risk threshold is determined based on the historical transmission power of the cable and the number of power users supplied, and whether an early warning signal needs to be output is determined based on the damage risk threshold and the comprehensive damage risk assessment.

[0089] Example 2

[0090] On the other hand, the present invention provides a computer system, comprising: a memory and a processor connected in communication, and a computer program stored in the memory and capable of running on the processor, characterized in that: when the processor runs the computer program, it executes the above-mentioned method for intelligent detection and early warning of urban distribution cable faults.

[0091] The present invention achieves the following technical effects:

[0092] 1. Based on precipitation data and historical water accumulation data of cable trenches under different historical precipitation data, the damage risk analysis period of cables in different cable trenches is determined, thereby realizing accurate assessment of cable water accumulation risk from the perspective of precipitation data and historical water accumulation data, improving the efficiency of analysis and processing of damage risks of cables with higher water accumulation risks, and ensuring the safety and reliability of cable operation.

[0093] 2. Determine whether to output an early warning signal based on the historical transmission power of the cable, the number of power users supplied, the vibration damage risk of the cable and the damage risk assessment. This not only takes into account the differences in the damage risk requirements of the cable due to differences in transmission power and the number of power users supplied, but also takes into account the differences in the probability of damage risk caused by differences in the vibration damage risk of the cable and the damage risk assessment. This ensures the safety of cable operation and realizes the output of early warning signals for cables with a higher risk of damage.

[0094] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, equipment, and non-volatile computer storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0095] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0096] The above description is only one or more embodiments of this specification and is not intended to limit this specification. For those skilled in the art, one or more embodiments of this specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of one or more embodiments of this specification shall be included in the scope of the claims of this specification.

Claims

1. An intelligent detection and early warning method for urban power distribution cable faults, characterized in that: Specifically include: Obtain precipitation data within a preset time period in the area where different cable trenches are located, and determine the damage risk analysis period of cables in different cable trenches based on the precipitation data and the historical water accumulation data of the cable trench under different historical precipitation data; Based on the damage risk analysis cycle, the line loss data of the cables in the cable trench in different transmission power intervals are obtained, and when it is determined that the damage risk assessment amount of the cables does not meet the requirements according to the line loss data of the cables in different transmission power intervals and the changes in the line loss data, the next step is entered; Determine the vibration characteristic quantities of different transmission power intervals by using the vibration data of the cable in different transmission power intervals, and determine the vibration damage risk of the cable by using the correlation coefficient between the different vibration characteristic quantities and the damage severity of the cable, and proceed to the next step when the vibration damage risk of the cable does not meet the requirements; Obtain the historical transmission power of the cable and the power users supplied, and determine whether it is necessary to output a warning signal in combination with the vibration damage risk of the cable and the damage risk assessment amount; The method for determining the vibration damage risk of the cable is: Determining the vibration damage risk of the cable in different transmission power intervals based on the vibration characteristic quantities in different transmission power intervals and the correlation coefficients between the different vibration characteristic quantities and the damage severity of the cable; Obtaining the operating time of the cable in different transmission power intervals, and determining the vibration damage risk of the cable in combination with the interval vibration damage risk of the cable in different transmission power intervals; When the vibration damage risk of the cable meets the requirement, there is no need to output the early warning signal; When the damage risk assessment value of the cable meets the requirement, it is determined that there is no need to output a warning signal.

2. The intelligent detection and early warning method for urban power distribution cable faults according to claim 1, characterized in that: The preset time is determined based on historical water accumulation data of different cable trenches, wherein the more cable trenches with water accumulation there are, the longer the preset time is.

3. The intelligent detection and early warning method for urban power distribution cable faults according to claim 1, characterized in that: The preset time ranges from 3 days to one week.

4. The intelligent detection and early warning method for urban power distribution cable faults according to claim 1, characterized in that: The method for determining the damage risk analysis period of the cables in the cable trench is: Determine the rainfall amount in different divided time periods in the area where the cable trench is located within a preset time according to the rainfall data, and determine the rainfall similarity with different historical precipitation times according to the rainfall amount in different divided time periods in the area where the cable trench is located within the preset time and historical precipitation data; Determine similar precipitation times in the historical precipitation times based on precipitation similarities with different historical precipitation times, and determine the water accumulation risk value of the cable trench through historical water accumulation data of different similar precipitation times and precipitation similarities; The damage risk analysis period of the cable is determined by the water accumulation risk value of the cable trench.

5. The intelligent detection and early warning method for urban power distribution cable faults according to claim 4, characterized in that: Determining the cable damage risk analysis period according to the water accumulation risk value of the cable trench specifically includes: The matching water accumulation risk interval of the cable trench is determined according to the water accumulation risk value of the cable trench, and the damage risk analysis period of the cable is determined based on the matching analysis period of the water accumulation risk interval.

6. The intelligent detection and early warning method for urban power distribution cable faults according to claim 1, characterized in that: The transmission power interval is divided according to a preset power interval and a historical transmission power range of the cable.

7. The intelligent detection and early warning method for urban power distribution cable faults according to claim 1, characterized in that: The line loss data includes line loss amount and line loss percentage.

8. The intelligent detection and early warning method for urban power distribution cable faults according to claim 1, characterized in that: Determine whether the damage risk assessment of the cable meets the requirements, including: Determine the variation range of the line loss amount and line loss percentage of the cable in different transmission power intervals through the line loss data of the cable in different transmission power intervals, and determine the line loss abnormal values ​​in different transmission power intervals in combination with the corresponding time lengths of different line loss amounts and the corresponding time lengths of line loss percentages in different distribution intervals; Determine the variation data of the line loss amount in different unit time lengths according to the line loss data of the cable in different transmission power intervals, and determine the number of changes of the line loss amount in different unit time lengths and the variation of the line loss amount at different variation times based on the variation data, and determine the abnormal value of the line loss variation of the cable in different transmission power intervals in combination with the number of changes in which the variation percentage of the line loss amount does not meet the requirement; The operating time of the cable in different transmission power intervals is obtained, and the damage risk assessment of the cable is determined in combination with the line loss change abnormal values ​​and line loss abnormal values ​​of the cable in different transmission power intervals. The damage risk assessment of the cable is determined whether it meets the requirements through the line loss abnormal assessment value and the preset abnormal threshold.

9. The intelligent detection and early warning method for urban power distribution cable faults according to claim 1, characterized in that: The value range of the vibration damage risk of the cable is between 0 and 1, wherein when the vibration damage risk of the cable is greater than a preset risk value, it is determined that the vibration damage risk of the cable does not meet the requirement.

10. A computer system comprising: A memory and a processor connected in communication, and a computer program stored in the memory and capable of running on the processor, characterized in that the processor executes an intelligent detection and early warning method for urban power distribution cable faults as described in any one of claims 1 to 9 when running the computer program.

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