A system and method for auxiliary detection of the operating state of a cable line ground

Abstract

The application discloses a kind of auxiliary detection system and method of cable line ground operating state, it is related to cable detection technical field, by dividing to cable layout area, and based on the soil environment of each area carries out cable abnormal test, and then analyze the connection between cable abnormal state and soil abnormal information and gas abnormal information in each soil environment, obtain cable abnormal operation-exception information correlation table, and after cable layout is completed, based on satellite monitoring system and distributed gas sensor, the soil abnormal information and gas abnormal information of each area are monitored, reduce the monitoring cost while can find the abnormality of soil and gas in time, and based on the soil abnormal information and gas abnormal information of each area, cable abnormal operation-exception information correlation table is inquired, to detect and repair the cable abnormal state of each area based on the query result, avoid the waste of manpower and resources caused by artificial detection.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of cable detection, in particular to an auxiliary detection system and method for the grounding operation state of a cable line. BACKGROUND

[0002] Underground cables may fail due to insulation aging and external damage during long-term operation. The existing detection methods for underground cables cannot timely detect the operation abnormalities of the cables. Auxiliary detection of underground cables can detect cable abnormalities in advance, and thus timely detection of the cables can be performed. Therefore, the application provides an auxiliary detection system and method for the grounding operation state of a cable line.

[0003] The prior art, such as the invention patent disclosed in the application No. CN111476380A, discloses a cable maintenance auxiliary test platform, which comprises a cable test and detection unit, a multi-source state detection data analysis unit, a multi-dimensional early warning threshold optimization early warning technology unit, a cable operation state evaluation method forming unit, a cable intelligent diagnosis model generation unit, a cable state maintenance auxiliary decision support system platform establishment unit and a cable state detection auxiliary decision support system forming unit. The cable maintenance auxiliary test platform proposes a multi-source state monitoring data analysis model based on information driving, realizes fusion, analysis and intelligent processing of various data of the cable, and updates and corrects the weight by fusing the multi-source data of the cable, applying modern management concepts and management technologies, and combining the actual operation conditions of the local power grid.

[0004] For the above-mentioned scheme, the following technical problems exist: 1. The current technology mainly realizes fusion, analysis and intelligent processing of various data of the cable through a multi-source state monitoring data analysis model. The current technology cannot realize real-time monitoring of the cable state, and thus cannot timely detect the operation abnormalities of the cable. Moreover, the current technology has a relatively complex collection process for various operation data of the cable, and has a high detection cost.

[0005] 2. The current technology still collects and processes a large amount of data for monitoring the operation state of the cable, and does not consider monitoring abnormal phenomena caused by cable abnormalities. When the cable is abnormal, the soil on the ground may be depressed, raised or cracked. Monitoring of this phenomenon can timely and effectively monitor the operation abnormalities of the cable and greatly reduce the cost and difficulty of monitoring. SUMMARY

[0006] The application aims to provide an auxiliary detection system and method for the grounding operation state of a cable line, which solves the problems in the background art.

[0007] To solve the above-mentioned technical problems, this application adopts the following technical solution: In the first aspect, this application provides an auxiliary detection system for the grounding operation status of cable lines, including: an anomaly test module: used to divide the cable laying area into regions before laying underground cables, obtain each target sub-region, and then conduct anomaly tests on the cable based on the soil environment of each target sub-region, thereby obtaining soil information and gas information at the surface of each target sub-region when the cable operation status is abnormal.

[0008] Anomaly Correlation Module: This module analyzes the relationship between cable operating status and surface soil and surface gas information based on the test results of each cable test group, thereby obtaining a cable abnormal operation-anomaly information correlation table.

[0009] Auxiliary detection module: used to monitor the surface soil and gas information of each target sub-region. When the surface soil and gas information of each target sub-region is abnormal, the expected abnormal status of the cable in each target sub-region is queried according to the cable abnormal operation-abnormal information association table.

[0010] Anomaly Confirmation Module: This module is used to check each expected anomaly status of the cables in each sub-area one by one, thereby confirming the anomaly status of the cables in each target sub-area.

[0011] In its second aspect, this application provides an auxiliary detection method for the grounding operation status of a cable line, comprising: Step 1, anomaly testing: before laying underground cables, the cable laying area is divided into regions to obtain target sub-regions, and then anomaly testing is performed on the cable based on the soil environment of each target sub-region, thereby obtaining soil and gas information at the surface of each target sub-region when the cable operation status is abnormal.

[0012] Step 2, Anomaly Correlation: This step is used to analyze the relationship between cable operating status and surface soil and surface gas information based on the test results of each cable test group, thereby obtaining a cable abnormal operation-abnormal information correlation table.

[0013] Step 3: Auxiliary detection: This step is used to monitor the surface soil and gas information of each target sub-region. When abnormalities are found in the surface soil and gas information of each target sub-region, the expected abnormal status of the cable in each target sub-region is queried according to the cable abnormal operation-abnormal information association table.

[0014] Step 4, Anomaly Confirmation: This step involves checking each anticipated anomaly in the cables of each sub-area one by one to confirm the anomaly status of the cables in each target sub-area.

[0015] The beneficial effects of this application are as follows: 1. This application divides the cable laying area and conducts cable anomaly tests based on the soil environment of each area. Then, it analyzes the relationship between the cable anomaly status and soil anomaly information and gas anomaly information in each soil environment to obtain a cable anomaly operation-anomaly information correlation table. After the cable laying is completed, the application monitors the soil anomaly information and gas anomaly information in each area based on the satellite monitoring system and distributed gas sensors. This reduces the monitoring cost and enables timely detection of soil and gas anomalies. Based on the soil anomaly information and gas anomaly information in each area, the application queries the cable anomaly operation-anomaly information correlation table. Based on the query results, the application detects and repairs the cable anomaly status in each area, avoiding the waste of manpower and resources caused by manual inspection.

[0016] 2. This application conducts abnormal tests on cables based on the cable's deployment environment, thereby obtaining abnormal information on surface soil and gas in various locations when the cable's operating status is abnormal. It then analyzes the relationship between abnormal cable operating status and abnormal surface soil and gas, laying the foundation for subsequent auxiliary detection of cable operating status.

[0017] 3. This application achieves real-time monitoring of soil and gas anomalies in various areas where the cable is located through a satellite monitoring system and deployed gas sensors. The monitoring cost is low and the monitoring process is simple, while also being able to detect potential operational faults in the cable in a timely manner. This allows for further detection and repair of the cable's operational anomalies, preventing serious accidents or economic losses caused by further deterioration of the fault. At the same time, the spatial distribution characteristics of soil and gas anomalies can confirm the approximate location of the abnormal cable, thereby reducing the detection range of the abnormal cable and greatly improving the efficiency of fault diagnosis. Furthermore, the soil and gas anomaly information can be used to roughly determine the type of cable anomaly, avoiding the waste of time and resources caused by detecting various types of cables, and also providing a basis for the staff to develop inspection and maintenance plans. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the system structure connection of this application.

[0020] Figure 2 This is a flowchart illustrating the steps involved in implementing the method described in this application. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] Reference Figure 1 As shown, this application provides an auxiliary detection system for the grounding operation status of a cable line in a first aspect, including the following modules: an anomaly test module: used to divide the cable laying area into regions before laying underground cables, obtain each target sub-region, and then conduct anomaly tests on the cable based on the soil environment of each target sub-region, thereby obtaining soil information and gas information at the surface of each target sub-region when the cable operation status is abnormal.

[0023] In a specific instance, the soil anomaly information refers to anomalies in the soil caused by abnormal cable operation; the gas anomaly information refers to the types of abnormal gases generated by abnormal cable operation and permeating to the surface through the soil.

[0024] It should be noted that the soil anomaly information includes soil heave, subsidence, charred black color, and fog formation; the abnormal gases include ammonia nitrogen oxides, ozone, sulfides, hydrogen, nitric oxide, nitrogen dioxide, and alkane gases, wherein sulfides include hydrogen sulfide and sulfur dioxide; alkane gases include methane and ethane; and ammonia nitrogen oxides include ammonia and nitrogen.

[0025] In a specific example, the process of dividing the cable laying area into target sub-regions is as follows: The cable laying trajectory is obtained from the cable construction drawing, and then the soil types of the cable laying area are determined. The cable laying area is divided into sub-regions according to a preset distance. Soil samples are collected from a sub-region at a preset sub-distance. After mixing the soil samples from the sub-region, the moisture content of the soil samples in the sub-region is measured using a soil resistivity and moisture meter. The moisture content of the soil samples in the sub-region is compared with a set soil moisture threshold. If the moisture content of the soil samples in the sub-region is less than the set soil moisture threshold, the sub-region is recorded as a dry soil sub-region; otherwise, it is recorded as a moist soil sub-region. Based on this, each moist soil sub-region and each dry soil sub-region is obtained.

[0026] Simultaneously, the soil permeability of a soil sample in a certain sub-region is measured using the static air cell method, and the soil permeability of the soil sample in that sub-region is compared with a set soil permeability threshold. If the soil permeability of the soil sample in that sub-region is less than the set soil permeability threshold, the sub-region is recorded as an impermeable soil sub-region; otherwise, the sub-region is recorded as a permeable soil sub-region. Based on this, each soil permeability group and each impermeable soil sub-region are obtained.

[0027] By combining the soil moist sub-regions, soil dry sub-regions, soil permeable group regions, and soil impermeable sub-regions, we obtain soil moist and permeable sub-regions, soil moist and impermeable sub-regions, soil dry and permeable sub-regions, and soil dry and impermeable sub-regions, which are collectively referred to as target sub-regions.

[0028] It should be noted that the preset distance and the preset sub-distance are both set by the relevant staff and are not specifically restricted here. However, the preset sub-distance cannot exceed the preset distance.

[0029] It should be noted that the static air chamber method is existing technology, and therefore will not be described in detail.

[0030] It should be noted that the soil moisture threshold mentioned is the global average soil moisture threshold, which is 0.19m. 3 / m 3 The soil permeability threshold is the global average soil permeability threshold, which is 10% of the oxygen content in the soil.

[0031] In a specific example, the abnormal test of the cable is carried out based on the soil environment of each target sub-region, so as to obtain the soil information and gas information at the surface of each target sub-region when the cable is in an abnormal operating state. The specific process is as follows: S1, set up the corresponding test soil in the laboratory according to the soil environment of each target sub-region.

[0032] S2. Based on the cable laying depth, set up each cable test group and denot each test group as follows: Where i is the test group number, i=1,2,3, where number 1, number 2, and number 3 represent cable laying depths of 1 meter, 1.5 meters, and 2 meters, respectively; j is the target sub-region number, j=1,2,3,4, where number 1, number 2, number 3, and number 4 represent sub-regions with moist and permeable soil, sub-regions with moist and impermeable soil, sub-regions with dry and permeable soil, and sub-regions with dry and impermeable soil, respectively; n is the cable operation abnormality type number, n=1,2,3,4, where number 1, number 2, number 3, and number 4 represent partial discharge, short circuit, and overload, respectively. After setting up, the cable is laid in the laboratory test soil corresponding to each target sub-region.

[0033] S3. Conduct cable operation status abnormality-ground surface information abnormality correlation test and cable operation abnormality-gas information abnormality correlation test for each cable test group, and record the test results. The test ends after the recording is completed.

[0034] In a specific example, each cable test group performs a correlation test between abnormal cable operation status and abnormal surface information, and a correlation test between abnormal cable operation and abnormal gas information. The specific test process is as follows: After abnormal control of each cable in each cable test group, the cables are laid in test soil at various depths. Monitoring equipment is used to capture surface images of each cable test group, and infrared equipment is used to acquire the surface temperature of each cable test group. Based on this, soil abnormality information corresponding to each test soil of each cable test group is obtained. At the same time, gas sensors are deployed at the surface of each test soil in the laboratory corresponding to each target sub-area to monitor the gas information at the surface of each test soil in real time. Based on this, abnormal gas information corresponding to each test soil of each cable test group is obtained, and cable operation abnormality-surface abnormality correlation test and cable operation abnormality-surface abnormal gas correlation test are performed on each test group.

[0035] It should be noted that, in order to avoid mutual interference between soil anomaly information and gas anomaly information between different cable test groups, each cable test group is tested separately. For example, after the cable test group with a cable laying depth of 1 meter is tested, the cable test group with a cable laying depth of 2 meters is tested.

[0036] Anomaly Correlation Module: This module analyzes the relationship between cable operating status and surface soil and surface gas information based on the test results of each cable test group, thereby obtaining a cable abnormal operation-anomaly information correlation table.

[0037] In a specific example, the process of analyzing the relationship between cable operating status and surface soil and surface gas information based on the test results of each cable test group, and then obtaining a cable abnormal operation-abnormal information association table, is as follows.

[0038] Based on the test results of the correlation test between abnormal cable operation status and abnormal surface information, abnormal surface soil information corresponding to each abnormal cable operation status is obtained.

[0039] It should be noted that the abnormal information of the surface soil includes soil cracking, depression, bulging and the appearance of air bubbles.

[0040] Based on the test results of the correlation test between cable operation anomaly and abnormal surface gas, the abnormal surface gas information of the cable under each abnormal operation state is obtained.

[0041] It should be noted that the gas anomaly information includes the presence of sulfur dioxide, ammonia nitrogen oxides, and hydrogen on the ground surface.

[0042] Based on the surface anomaly information corresponding to each abnormal operating state of the cable and the surface gas anomaly information corresponding to each abnormal operating state of the cable, a cable abnormal operation-anomaly information association table is constructed.

[0043] It should be noted that the cable abnormal operation-abnormal information association table is as follows:

[0044]

[0045] Auxiliary detection module: used to monitor the surface soil and gas information of each target sub-region. When the surface soil and gas information of each target sub-region is abnormal, the expected abnormal status of the cable in each target sub-region is queried according to the cable abnormal operation-abnormal information association table.

[0046] In a specific example, the monitoring of surface phenomena and surface gases in each target sub-region is carried out as follows: the satellite monitoring system is connected to the cable maintenance terminal, and then the surface images of each target sub-region are monitored through the satellite monitoring system.

[0047] Distributed gas sensors are deployed in each target sub-area to build a wireless sensor network, and the gas information collected by each gas sensor is transmitted to the cable maintenance terminal through wireless communication technology.

[0048] In a specific example, the process of querying the expected abnormal states of cables in each target sub-area based on the cable abnormal operation-abnormal information association table is as follows: After processing the received surface images of each target sub-area, the cable maintenance terminal performs anomaly identification. When an abnormality is detected in the soil of a target sub-area, the soil anomaly information in that target sub-area is extracted, and the soil anomaly information and gas anomaly information of that target sub-area are combined and recorded as the anomaly information of that target sub-area. Based on the anomaly information of that target sub-area, the cable abnormal operation-abnormal information association table is queried to obtain the expected abnormal states of cables in that target sub-area. The expected abnormal states of each target sub-area are obtained in this way.

[0049] It should be noted that the abnormal information of a certain target sub-region may be found in the cable abnormal operation-abnormal information association table, which may yield multiple cable abnormal status results. For example, when the soil in a dry and impermeable sub-region cracks and produces ozone, nitric oxide and nitrogen dioxide gases, then partial discharge and cable overload of the cable will be recorded as the expected abnormal status of the cable in that dry and impermeable sub-region.

[0050] Anomaly Confirmation Module: Used to check each expected anomaly state of the cables in each sub-area one by one, thereby confirming the anomaly state of the cables in each target sub-area.

[0051] In a specific instance, the process of checking each expected abnormal state of the cables in each sub-area one by one to confirm the abnormal state of the cables in each target sub-area is as follows: If a target sub-area has only one expected abnormal state after querying, then based on the abnormal state of the target sub-area, relevant personnel are dispatched to the target sub-area to confirm the abnormal state of its underground cables, and then the underground cables in the target sub-area are repaired.

[0052] If a target sub-area has multiple expected abnormal states after querying, relevant personnel will be dispatched to the target sub-area to conduct corresponding detections based on the types of expected abnormal states, thereby determining the abnormal state of the cables in the target sub-area, and then dispatching relevant personnel to repair the underground cables in the target sub-area.

[0053] Reference Figure 2 As shown, this application provides an auxiliary detection method for the grounding operation status of a cable line in a second aspect, including the following steps: Step 1, anomaly test: before laying underground cables, the cable laying area is divided into regions to obtain each target sub-region, and then anomaly test is performed on the cable based on the soil environment of each target sub-region, so as to obtain soil information and gas information at the surface of each target sub-region when the cable operation status is abnormal.

[0054] Step 2, Anomaly Correlation: This step is used to analyze the relationship between cable operating status and surface soil and surface gas information based on the test results of each cable test group, thereby obtaining a cable abnormal operation-abnormal information correlation table.

[0055] Step 3: Auxiliary detection: This step is used to monitor the surface soil and gas information of each target sub-region. When abnormalities are found in the surface soil and gas information of each target sub-region, the expected abnormal status of the cable in each target sub-region is queried according to the cable abnormal operation-abnormal information association table.

[0056] Step 4, Anomaly Confirmation: This step involves checking each anticipated anomaly in the cables of each sub-area one by one to confirm the anomaly status of the cables in each target sub-area.

[0057] By dividing the cable laying area into zones and conducting cable anomaly tests based on the soil environment of each zone, the correlation between cable anomalies and soil and gas anomalies in each soil environment is analyzed to obtain a cable anomaly operation-anomaly information correlation table. After the cable laying is completed, soil and gas anomalies in each zone are monitored using a satellite monitoring system and distributed gas sensors. This reduces monitoring costs while enabling timely detection of soil and gas anomalies. The cable anomaly operation-anomaly information correlation table is queried based on the soil and gas anomalies in each zone, allowing for the detection and repair of cable anomalies in each zone based on the query results, thus avoiding the waste of manpower and resources caused by manual inspection.

[0058] The above content is merely an example and illustration of the concept of this application. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the inventive concept or exceed the scope defined in this application, they should all fall within the protection scope of this application.

Claims

1. An auxiliary detection system for cable line ground operating conditions, characterized in that, The application relates to a cable abnormality detection method and device. The abnormality test module is used for dividing a cable laying area into target subareas before laying an underground cable, and then testing the cable based on the soil environment of the target subareas, so as to obtain soil information and gas information on the ground surface of each target subarea when the cable is abnormal. The abnormality correlation module is used for analyzing the correlation between the cable operation state and the ground soil information and the ground gas information according to the test results of each cable test group, and then obtaining a cable abnormal operation-abnormal information correlation table. The auxiliary detection module is used for monitoring the ground soil information and the ground gas information of each target subarea, and when the ground soil information and the ground gas information of each target subarea are abnormal, the expected abnormal states of the cable of each target subarea are obtained according to the cable abnormal operation-abnormal information correlation table. The satellite monitoring system is connected to the cable maintenance terminal, and then the ground image of each target subarea is monitored through the satellite monitoring system. Distributed gas sensors are arranged in each target subarea, a wireless sensor network is constructed, and the gas information collected by each gas sensor is transmitted to the cable maintenance terminal through wireless communication technology. When the soil of a target subarea is identified as abnormal, the soil abnormal information of the target subarea is extracted, the soil abnormal information and the gas abnormal information of the target subarea are integrated as abnormal information of the target subarea, the cable abnormal operation-abnormal information correlation table is queried based on the abnormal information of the target subarea, and then the expected abnormal states of the cable of the target subarea are obtained. The abnormality confirmation module is used for checking the expected abnormal states of the cable of each target subarea one by one, so as to confirm the cable abnormal state of each target subarea. The soil abnormal information represents abnormal phenomena caused by the abnormal cable operation state, and the gas abnormal information represents abnormal gas types generated by the abnormal cable operation state and penetrated to the ground surface through the soil. The cable laying area is divided into target subareas, and the specific process is as follows:

2. An auxiliary detection system for operating condition of a cable line ground according to claim 1, characterized in that, ​ 3. An auxiliary detection system for operating condition of a cable line ground according to claim 1, characterized in that, ​ The laying track of the cable is obtained from the cable construction drawing, and then the soil types of the cable laying area are obtained, the cable laying area is divided into sub-areas according to a preset distance, the soil samples of a sub-area are collected according to a preset sub-distance, the soil samples of the sub-area are mixed, the moisture of the soil samples of the sub-area is measured by using a soil resistance moisture tester, the moisture of the soil samples of the sub-area is compared with a set soil moisture threshold value, if the moisture of the soil samples of the sub-area is less than the set soil moisture threshold value, the sub-area is recorded as a soil dry sub-area, otherwise, the sub-area is recorded as a soil wet sub-area, and accordingly, the soil wet sub-areas and the soil dry sub-areas are obtained; Meanwhile, the soil permeability of the soil samples of the sub-area is measured by using a static air chamber method, and the soil permeability of the soil samples of the sub-area is compared with a set soil permeability threshold value, if the soil permeability of the soil samples of the sub-area is less than the set soil permeability threshold value, the sub-area is recorded as a soil impermeable sub-area, otherwise, the sub-area is recorded as a soil permeable sub-area, and accordingly, the soil permeable sub-areas and the soil impermeable sub-areas are obtained; The soil wet sub-areas, the soil dry sub-areas, the soil permeable sub-areas and the soil impermeable sub-areas are comprehensively obtained, and accordingly, the soil wet and permeable sub-areas, the soil wet and impermeable sub-areas, the soil dry and permeable sub-areas and the soil dry and impermeable sub-areas are obtained, which are comprehensively recorded as target sub-areas.

4. An auxiliary detection system for operating condition of a cable line ground according to claim 2, characterized in that, The soil environment of the target sub-areas is used for abnormal testing of the cable, so that the soil information and the gas information at the ground surface of the target sub-areas are obtained when the cable is in an abnormal running state, and the specific process is as follows: S1, the test soil corresponding to each target sub-area is set in the laboratory according to the soil environment of the target sub-area; S2, setting each cable test group based on the laying depth of the cable, and recording each test group as wherein i is the number of each test group, i = 1, 2, 3, number 1, number 2 and number 3 respectively represent the cable laying depth of 1 meter, 1.5 meters and 2 meters, j is the number of each target sub-region, j = 1, 2, 3, 4, number 1, number 2, number 3 and number 4 respectively represent each soil humid and breathable sub-region, each soil humid and non-breathable sub-region, each soil dry and breathable sub-region and each soil dry and non-breathable sub-region, n is the number of cable operation state abnormal type, n = 1, 2, 3, 4, number 1, number 2, number 3 and number 4 respectively represent cable partial discharge, short circuit, overload and damp, after setting, the cable is laid in the laboratory test soil corresponding to each target sub-region; S3, the cable running state abnormal-ground surface information abnormal correlation test and the cable running abnormal-gas information abnormal correlation test are performed on each cable test group, and the test results are recorded, and the test is ended after the recording is completed.

5. An auxiliary detection system for operating condition of a cable line ground according to claim 4, characterized in that, The cable running state abnormal-ground surface information abnormal correlation test and the cable running abnormal-gas information abnormal correlation test are performed on each cable test group, and the specific test process is as follows: After the abnormal control of each cable of each cable test group, the cables are laid in the test soil of each depth, the ground surface images of each cable test group are photographed by using a monitoring device, and the ground surface temperature of each cable test group is obtained by using an infrared device, so that the soil abnormal information of each test soil corresponding to each cable test group is obtained, and at the same time, the gas sensor is laid at the ground surface of each test soil in the laboratory corresponding to each target sub-area, so that the gas information at the ground surface of each test soil is monitored in real time, and accordingly, the abnormal gas information at the ground surface of each test soil corresponding to each cable test group is obtained, and the cable running state abnormal-ground surface abnormal correlation test and the cable running abnormal-ground surface abnormal gas correlation test are performed on each test group.

6. An auxiliary detection system for operating condition of a cable line ground according to claim 5, characterized in that, The relationship between the cable running state and the ground surface soil information and the ground surface gas information is analyzed according to the test results of each cable test group, and accordingly, a cable abnormal running- abnormal information correlation table is obtained, and the specific process is as follows: Based on the test result of cable operation state abnormal-ground surface information abnormal correlation test, the cable in each abnormal operation state corresponding to the ground surface abnormal information is obtained; Based on the test result of cable operation abnormal-ground surface abnormal gas correlation test, the cable in each abnormal operation state corresponding to each ground surface gas abnormal information is obtained; Based on the cable in each abnormal operation state corresponding to the ground surface abnormal information and the cable in each abnormal operation state corresponding to each ground surface gas abnormal information, the cable abnormal operation- abnormal information correlation table is constructed comprehensively.

7. An auxiliary detection system for operating condition of a cable line ground according to claim 6, characterized in that, The abnormal state of each target sub-area cable is checked one by one, so as to confirm the abnormal state of the cable of each target sub-area, and the specific process is as follows: If there is only one expected abnormal state in a target sub-area after query, based on the abnormal state of the target sub-area, relevant personnel are dispatched to the target sub-area to confirm the underground cable abnormal state, and then the underground cable of the target sub-area is repaired; If there are multiple expected abnormal states in a target sub-area after query, based on the type of each expected abnormal state of the target sub-area, relevant personnel are dispatched to the target sub-area to detect each expected abnormal state, and then the abnormal state of the cable of the target sub-area is determined, so as to dispatch relevant personnel to repair the underground cable of the target sub-area.

8. A method of auxiliary detection of the grounding operating state of a cable line of the system of auxiliary detection of the grounding operating state of a cable line according to any one of claims 1 to 7, characterized in that, It includes: Step one, abnormal test: used for dividing the cable laying area into target sub-areas before laying underground cable, and then based on the soil environment of each target sub-area, the cable is tested to obtain the soil information and gas information of each target sub-area when the cable is in abnormal operation state; Step two, abnormal correlation: used for analyzing the relationship between cable operation state and ground soil information and ground gas information according to the test results of each cable test group, and then obtaining the cable abnormal operation- abnormal information correlation table; Step three: auxiliary detection: used for monitoring the ground soil information and gas information of each target sub-area, and when the ground soil information and gas information of each target sub-area appear abnormal, the expected abnormal state of the cable of each target sub-area is queried according to the cable abnormal operation- abnormal information correlation table; The ground surface image and ground gas of each target sub-area are monitored, and the specific monitoring process is as follows: The satellite monitoring system is connected to the cable maintenance terminal, and then the satellite monitoring system is used to monitor the ground surface image of each target sub-area; Distributed gas sensors are arranged in each target sub-area, and then a wireless sensor network is constructed, and the gas information collected by each gas sensor is transmitted to the cable maintenance terminal through wireless communication technology; The expected abnormal state of the cable of each target sub-area is queried according to the cable abnormal operation- abnormal information correlation table, and the specific process is as follows: The cable maintenance terminal performs abnormality identification on the received surface images of each target sub-region, extracts soil abnormal information in the target sub-region when identifying that the soil in the target sub-region is abnormal, and records the soil abnormal information in the target sub-region and the gas abnormal information as abnormal information of the target sub-region. The cable abnormal operation-abnormal information correlation table is queried based on the abnormal information of the target sub-region, and then each predicted abnormal state of the cable in the target sub-region is obtained. In this way, each predicted abnormal state of each target sub-region is obtained. Step four, abnormality confirmation: used for checking each predicted abnormal state of each sub-region cable one by one, so as to confirm the cable abnormal state of each target sub-region.

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