A method and system for monitoring the operation and maintenance status of a cable trench

Abstract

The present invention relates to the technical field of cable trench management and control. Specifically, it relates to a method and a monitoring system for monitoring the operation and maintenance status of a cable trench. The problem solved by the present invention is: how to correct the alarm threshold of the working environment of cable equipment according to the loss status of the cable equipment itself. To solve the above problem, the present invention provides a method for monitoring the operation and maintenance status of a cable trench, including: dividing the cable trench into multiple management and control areas, determining the management and control levels of the cable equipment in the management and control areas according to the loss situation, recording the cable equipment with the same rated current and the same management and control level in the management and control area as associated cable equipment, calculating the current safety range of the associated cable equipment according to the correlation coefficient, and adjusting the current safety range according to the maintenance records.

Description

Technical Field

[0001] The present invention belongs to the technical field of cable trench management and control, and more specifically, relates to a method and a monitoring system for monitoring the operation and maintenance status of a cable trench. Background Art

[0002] The temperature and humidity in the cable trench are high, the environment is complex, the aging speed of the cable is fast, and fires are likely to occur. However, due to the special environment, structure and usage requirements of the cable trench, the maintenance work is often full of challenges. Traditional cable trench maintenance relies on manual inspection, and it is impossible to achieve all-weather and real-time monitoring. If there are problems inside the cable trench, the time period of manual inspection often cannot detect the problems in time, resulting in potential safety hazards not being dealt with for a long time. Therefore, the intelligent monitoring of the operation and maintenance status of the cable trench is extremely urgent. The working current of the cable is usually used as the judgment basis for the operation and maintenance status of the cable trench. However, when judging the operation and maintenance status of the cable through the current, there are some obvious limitations. The fluctuation of the current is not only affected by the health status of the cable itself during operation and maintenance, but may also be affected by various factors such as the external environment and load fluctuation. Therefore, it is a technical problem that needs to be urgently solved by those skilled in the art to correct the alarm threshold according to the health status of the cable itself during operation and maintenance and its working environment. Solving this problem can improve the efficiency and accuracy of the risk assessment and monitoring of the cable trench, enable the staff to discover the cables with abnormal work in time, thus leaving sufficient emergency repair time for the staff and reducing the losses caused by untimely early warning. Summary of the Invention

[0003] The problem solved by the present invention: How to correct the alarm threshold of its working environment according to the loss status of the cable equipment itself.

[0004] To solve the above problems, an embodiment of the present invention provides a method for monitoring the operation and maintenance status of a cable trench. The monitoring method includes: monitoring the environment in the cable trench through an intelligent monitoring unit to obtain environmental parameters, and sending the environmental parameters to a data management unit; dividing the cable trench into multiple management and control areas, and determining the management and control levels of the cable equipment in the management and control areas according to the loss conditions; obtaining the historical monitoring period adjacent to the current monitoring period from the data management unit, denoted as the adjacent monitoring period, denoting the environmental parameters of the adjacent monitoring period as the adjacent environmental parameters, and denoting the current fluctuation range of the adjacent monitoring period as the adjacent current range; denoting the cable equipment with the same rated current and the same management and control level in the management and control area as associated cable equipment; calculating the correlation coefficient of the associated cable equipment in the current monitoring period according to the adjacent current range and the adjacent environmental parameters of the associated cable equipment; calculating the current safety range of the associated cable equipment according to the correlation coefficient, and adjusting the current safety range according to the maintenance records.

[0005] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: The setting of multiple control regions makes the control of cable equipment more reasonable. The setting of control levels makes the control of cable equipment more targeted. The setting of correlation coefficients combines the same control levels with different change trends to obtain the current safety range that conforms to the working state of the cable equipment itself, making the cable equipment within the control region easier to control. The acquisition of maintenance records fully considers the working state of the cable equipment before the current monitoring period.

[0006] In an embodiment of the present invention, the cable trench is divided into multiple control regions, and the control levels of the cable equipment within the control regions are determined according to the loss situation. Specifically, it includes: The acquisition method of the loss value of the cable equipment is obtained by manual measurement after each cycle ends; according to the magnitude of the loss value of the cable equipment, the cable equipment is divided into multiple control levels, and the greater the loss value, the greater the corresponding control level.

[0007] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: By obtaining the loss value of the cable equipment, the loss situation of the cable equipment within each cycle can be obtained after each cycle ends, and the working state of each working cable in the near future can be understood in a timely manner. The setting of multiple control regions combined with control levels fully considers the influence brought by different working areas, making the control of cable equipment more targeted.

[0008] In an embodiment of the present invention, the historical monitoring cycle adjacent to the current monitoring cycle is obtained from the data management unit, denoted as the adjacent monitoring cycle. The environmental parameters of the adjacent monitoring cycle are denoted as the adjacent environmental parameters, and the current fluctuation range of the adjacent monitoring cycle is denoted as the adjacent current range. Specifically, each natural year is divided into multiple target monitoring cycles. The target monitoring cycle where the current natural day is located is denoted as the current monitoring cycle, and the target monitoring week before the current natural day is denoted as the historical monitoring cycle; the historical monitoring cycle adjacent to the current monitoring cycle is screened out, denoted as the adjacent monitoring cycle, the environmental parameters of the cable equipment within the adjacent monitoring cycle are obtained to get the adjacent environmental parameters, and the current extreme values of the cable equipment within the adjacent monitoring cycle are obtained to get the adjacent current range.

[0009] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: By obtaining the adjacent environmental parameters and the adjacent current range, the change situation of the current fluctuation range of the cable equipment with the change of environmental parameters is more intuitively reflected.

[0010] In one embodiment of the present invention, calculating the correlation coefficient of the associated cable device in the current monitoring period according to the adjacent current range and adjacent environmental parameters of the associated cable device specifically includes: obtaining the adjacent current range of the associated cable device in the target time period, denoted as the first adjacent fluctuation coefficient; obtaining the adjacent environmental parameters in the cable trench where the associated cable device is located in the target time period, denoted as the second adjacent fluctuation coefficient; calculating the correlation coefficient of the associated cable device in the current monitoring period according to the first adjacent fluctuation coefficient and the second adjacent fluctuation coefficient.

[0011] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: determining the influence of the change in the electrical equipment in the control area on the working current of the cable device through the first adjacent fluctuation coefficient, determining the influence brought by the change in the working environment of the cable device through the second adjacent fluctuation coefficient. After combining the first adjacent fluctuation coefficient and the second adjacent fluctuation coefficient, the relationship between the current fluctuation range of the cable device and the environmental parameters in the cable trench can be obtained more intuitively, making the obtained correlation coefficient more in line with the actual working conditions of the cable device.

[0012] In one embodiment of the present invention, calculating the correlation coefficient of the associated cable device in the current monitoring period according to the first adjacent fluctuation coefficient and the second adjacent fluctuation coefficient specifically includes: the calculation formula for the correlation coefficient of the associated cable device in the current monitoring period is as follows:

[0013]

[0014] Wherein, is the correlation coefficient, and are respectively the current value and the environmental parameter value of the th sample point, and are respectively the mean values of the current value and the environmental parameter value, and are respectively the standard deviations of the current value and the environmental parameter value, is the number of samples.

[0015] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: making the correlation coefficient more in line with the actual situation through the values of different sample points.

[0016] In one embodiment of the present invention, the current safety range of the associated cable equipment is calculated according to the correlation coefficient, and the current safety range is adjusted according to the maintenance records. Specifically, it includes: obtaining the historical monitoring period corresponding to the current monitoring period, denoted as the comparison monitoring period, obtaining the environmental parameters of the comparison monitoring period, denoted as the comparison environmental parameters, and obtaining the current range of the comparison monitoring period, denoted as the comparison current range; calculating the current safety range of the associated cable equipment according to the comparison current range and the comparison environmental parameters; obtaining the maintenance records of the associated cable equipment within the target time, and correcting the current safety range according to the maintenance records to obtain the corrected safety range; obtaining the real-time current result of the associated cable equipment within the current monitoring period, and calculating the updated safety range according to the real-time current result and the corrected safety range.

[0017] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: The setting of the current monitoring period and the comparison monitoring period enables the cable equipment to be compared with its original working state, obtaining a more accurate change trend. By obtaining the comparison environmental parameters, it provides a judgment index for the working state of the cable equipment in the current monitoring period. By obtaining the current fluctuation range, it can intuitively reflect the fluctuation situation of the cable equipment during the historical working process. The setting of the corrected safety range improves the accuracy of the intelligent monitoring unit in monitoring the cable equipment.

[0018] In one embodiment of the present invention, calculating the current safety range of the associated cable equipment according to the comparison current range and the comparison environmental parameters specifically includes: obtaining the comparison current range of the comparison time period, denoted as the comparison fluctuation coefficient one, obtaining the comparison environmental parameters of the comparison time period, denoted as the comparison fluctuation coefficient two; preliminarily dividing the current safety range of the associated cable according to the comparison fluctuation coefficient one, denoted as the safety range one; predicting the environmental parameters in the cable trench where the associated cable is located in the current monitoring period according to the comparison fluctuation coefficient two, denoted as the predicted fluctuation coefficient two; calculating the current fluctuation range of the associated cable equipment according to the correlation coefficient and the predicted fluctuation coefficient two, denoted as the safety range two; obtaining the current safety range according to the safety range one and the safety range two.

[0019] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: Obtaining the current safety range according to the safety range one and the safety range two fully considers the influence brought by the current change trend and the environment in the cable trench. By comparing the successive working states of the cable equipment, the accuracy of judging the working state of the cable equipment is improved.

[0020] In one embodiment of the present invention, a maintenance record of an associated cable device within a target time is obtained, and the current safety range is corrected according to the maintenance record to obtain a corrected safety range, which specifically includes: obtaining the number of maintenance times of the associated cable device and the corresponding maintenance reasons for each maintenance time according to the maintenance record of the associated cable device within the target time; screening the number of maintenance times according to the maintenance reasons to obtain the effective times and the ineffective times; and correcting the current safety range according to the effective times to obtain the corrected safety range.

[0021] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: the acquisition of the maintenance record fully considers the working state of the cable device before the current monitoring period, and the setting of the corrected safety range also improves the accuracy of the intelligent monitoring unit for monitoring the cable device.

[0022] In one embodiment of the present invention, a real-time current result of an associated cable device within the current monitoring period is obtained, and an updated safety range is calculated according to the real-time current result and the corrected safety range, which specifically includes: when the real-time current result is outside the corrected safety range, obtaining the installation location of the associated cable device and sending an alarm message; when the real-time current result is within the corrected safety range, updating the corrected safety range according to the correlation coefficient and the maintenance record to obtain the updated safety range.

[0023] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: the setting of the updated safety range enables the cable device to timely adjust the corrected safety range according to the current change trend, improving the compatibility and practicality of the intelligent monitoring unit.

[0024] In one embodiment of the present invention, the present invention also provides a monitoring system, and the cable trench operation and maintenance status monitoring method described in the above embodiment is applied to the monitoring system. The monitoring system includes: a storage module, and a data management unit is arranged in the storage module; a collection module, which is used to collect the rated current of the cable device in the control area; a calculation module, which is used to calculate the current safety range; a judgment module, which is used to judge whether there is a fault risk in the cable device. This monitoring system has all the technical features of the above cable trench operation and maintenance status monitoring method, and will not be elaborated here one by one. Brief Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings according to these drawings without creative efforts.

[0026] Figure 1One of the flowcharts of the cable trench operation and maintenance status monitoring method of the present invention;

[0027] Figure 2 Another flowchart of the cable trench operation and maintenance status monitoring method of the present invention;

[0028] Figure 3 Another flowchart of the cable trench operation and maintenance status monitoring method of the present invention;

[0029] Figure 4 Another flowchart of the cable trench operation and maintenance status monitoring method of the present invention;

[0030] Figure 5 System schematic diagram of the monitoring system of the present invention;

[0031] Explanation of reference numerals:

[0032] 100 - Monitoring system; 110 - Storage module; 120 - Acquisition module; 130 - Calculation module; 140 - Judgment module. Detailed implementation manners

[0033] To make the above - mentioned objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention is given with reference to the accompanying drawings.

[0034]

First Embodiment

[0035] Refer to Figure 1 , in a specific embodiment, the present invention provides a cable trench operation and maintenance status monitoring method, and the monitoring method includes:

[0036] S100. Monitor the environment in the cable trench through the intelligent monitoring unit to obtain environmental parameters, and send the environmental parameters to the data management unit;

[0037] S200. Divide the cable trench into multiple control areas, and determine the control level of the cable equipment in the control area according to the loss condition;

[0038] S300. Obtain the historical monitoring period adjacent to the current monitoring period from the data management unit, record it as the adjacent monitoring period, record the environmental parameters of the adjacent monitoring period as the adjacent environmental parameters, and record the current fluctuation range of the adjacent monitoring period as the adjacent current range;

[0039] S400. Record the cable equipment with the same rated current and the same control level in the control area as the associated cable equipment;

[0040] S500. Calculate the correlation coefficient of the associated cable equipment in the current monitoring period according to the adjacent current range and the adjacent environmental parameters of the associated cable equipment;

[0041] S600. Calculate the current safety range of associated cable equipment based on the correlation coefficient, and adjust the current safety range according to the maintenance records.

[0042] In step S200, each control area can be a village or a town. All cable equipment located in the cable trench within the control area will be controlled. The control level is usually divided into three levels, and the control level is determined according to the loss value of the cable equipment. The larger the loss value, the higher the corresponding control level.

[0043] In step S300, a natural year is divided into twelve monitoring periods according to months. The month in which the current natural day is located is recorded as the current monitoring period, and the months before the current natural day are recorded as historical monitoring periods. When the historical monitoring period is adjacent to the month of the current monitoring period, the historical monitoring period is recorded as the adjacent monitoring period of the current monitoring period. The current fluctuation range refers to the maximum and minimum values reached by the current value of the cable equipment within the adjacent monitoring periods.

[0044] It should be noted that when the cable equipment is damaged within the adjacent monitoring periods, the current will be 0. When determining the minimum value of the current fluctuation range of the cable equipment, this situation needs to be excluded to avoid inaccurate current fluctuation range of the cable equipment.

[0045] In steps S400 and S500, generally, the electricity consumption of each region over the years will change. Taking a new industrial park as an example, new power-consuming equipment will be introduced in each factory within the industrial park, resulting in an increase in the power consumption within the new industrial park, and the corresponding current of the cable equipment will also increase. Taking a new community as an example, in the previous few years, the number of residents gradually increased, and the power-consuming equipment in each household also improved, resulting in an increase in the power consumption of the entire community. These situations will all cause the current fluctuation range to change.

[0046] The specifications of the cable equipment used in different regions may be different. Therefore, when predicting the current safety range, cable equipment with the same rated current and the same control level, that is, associated cable equipment, is preferably selected. The correlation coefficient of the current monitoring period is obtained based on the power consumption of the associated cable equipment, so that the current safety range more conforms to the actual working conditions of the cable equipment within the control area.

[0047] In step S600, generally, the current fluctuation of the cable equipment after maintenance will be more intense during the working process. In order to avoid the impact of large fluctuations on the working state of the cable equipment, it is necessary to correct the current safety range according to the maintenance records.

[0048] The setting of multiple control areas makes the control of cable equipment more reasonable. The setting of control levels makes the control of cable equipment more targeted. The setting of correlation coefficients combines the same control levels with different change trends to obtain the current safety range that conforms to the working state of the cable equipment itself, making the cable equipment within the control area easier to control. The acquisition of maintenance records fully considers the working state of the cable equipment before the current monitoring period.

[0049]

Second Embodiment

[0050] In a specific embodiment, the cable trench is divided into multiple control areas, and the control levels of the cable equipment within the control areas are determined according to the loss conditions, specifically including:

[0051] S210. The method for obtaining the loss value of the cable equipment is obtained by manual measurement after each cycle.

[0052] S220. According to the magnitude of the loss value of the cable equipment, the cable equipment is divided into multiple control levels. The larger the loss value, the higher the corresponding control level.

[0053] In step S210, the loss value is usually obtained through actual manual measurement, which can be used to reflect the health status, load level, and potential future failure risks of the cable. Generally, the measurement frequency of the loss value of the cable equipment can be once a year. However, if the usage conditions of the cable equipment are relatively special, or there are factors such as excessive load or harsh environment, the measurement frequency can be appropriately increased.

[0054] In step S220, the division of control levels according to the loss value of the cable equipment helps to determine the operating safety of the cable, the required maintenance frequency, and potential failure risks. The higher the loss value, the worse the health status of the cable and the higher the management requirements. Generally, the control levels of the cable equipment can be divided into the following three levels:

[0055] Level 1: The loss value is relatively low, and the cable equipment is operating well and meets the standard specifications.

[0056] Level 2: The loss value has increased to a certain extent. The cable equipment may be in an overloaded state or the usage environment is not good, and regular inspections and monitoring are required.

[0057] Level 3: The loss value is relatively high. The cable equipment may show signs of failure and needs to be repaired or replaced.

[0058] For example, Level 1: The loss value is below 10% of the rated loss value, and the cable equipment is in good operating condition;

[0059] Level 2: The loss value is between 10% and 20% of the rated loss value. Signs of excessive load or poor environment begin to appear in the cable equipment, and regular inspections are required;

[0060] Level 3: The loss value is between 20% and 30% of the rated loss value. There are signs of overload or aging in the cable equipment, which may cause failures and require maintenance or replacement.

[0061] When the rated loss value of the cable equipment is 100W, when the loss value of the cable equipment is 5W, which is less than 10% of the rated loss, the cable is operating well. When the loss value of the cable equipment is 15W, which exceeds 10% of the rated loss but is less than 20% of the rated loss, signs of excessive load or poor environment begin to appear in the cable equipment, and regular inspections are required. When the loss value of the cable equipment is 25W, which exceeds 20% of the rated loss but is less than 30% of the rated loss, it indicates that there are signs of overload or aging in the cable equipment, which may cause failures and require maintenance or replacement.

[0062] By obtaining the loss value of the cable equipment, the loss situation of the cable equipment in each cycle can be obtained after each cycle ends, and the recent working status of each working cable can be understood in a timely manner. The combination of multiple control areas and the setting of control levels fully considers the impacts brought by different working areas, making the control of cable equipment more targeted.

[0063]

Third Embodiment

[0064] See Figure 2 In a specific embodiment, a historical monitoring cycle adjacent to the current monitoring cycle is obtained from the data management unit, denoted as the adjacent monitoring cycle. The environmental parameters of the adjacent monitoring cycle are denoted as the adjacent environmental parameters, and the current fluctuation range of the adjacent monitoring cycle is denoted as the adjacent current range, specifically including:

[0065] S310: Divide each natural year into multiple target monitoring cycles. The target monitoring cycle where the current natural day is located is denoted as the current monitoring cycle, and the target monitoring week before the current natural day is denoted as the historical monitoring cycle;

[0066] S320: Screen out the historical monitoring cycle corresponding to the current monitoring cycle, denoted as the adjacent monitoring cycle. Obtain the environmental parameters of the cable equipment within the adjacent monitoring cycle to obtain the adjacent environmental parameters, and obtain the current extreme values of the cable equipment within the adjacent monitoring cycle to obtain the adjacent current range.

[0067] In step S310, the target monitoring period is usually divided by month. A natural year is divided into twelve target monitoring periods by month. The month in which the current natural day is located is recorded as the current monitoring period, and the months before the current natural day are recorded as historical monitoring periods. When the historical monitoring period is adjacent to the month of the current monitoring period, the historical monitoring period is recorded as the adjacent monitoring period of the current monitoring period; Generally, the power consumption of the cable is usually affected by seasons. Under normal circumstances, the months with higher power consumption usually occur in summer and winter because the usage frequency of power-consuming devices is higher in these two seasons. Especially in extreme temperature conditions, taking summer as an example, to keep the indoor cool, the usage of air conditioners and cooling devices will increase significantly. Some industrial processes that require refrigeration may also increase power consumption in summer. Therefore, the current carried by the cable equipment will be higher.

[0068] The adjacent monitoring periods are named the first adjacent period, the second adjacent period, the third adjacent period, etc. according to the length of time from the current monitoring period. For example, to determine the alarm threshold of the cable equipment in the cable trench of a certain community in July 2024, the period from July 1, 2024 to July 31, 2024 is recorded as the current monitoring period, the dates before July 1, 2024 are recorded as historical monitoring periods, and the monitoring periods of June 2024, May 2024, April 2024, etc. are recorded as the first adjacent period, the second adjacent period, and the third adjacent period respectively.

[0069] In step S320, the current extreme values refer to the maximum and minimum values reached by the current value of the cable equipment within the adjacent monitoring periods. Generally, the performance of the cable equipment in the cable trench is affected by environmental parameters such as the temperature, humidity, ventilation condition, ultraviolet irradiation condition, and soil pH value in the cable trench. Taking temperature as an example, too high or too low temperature will affect the electrical performance of the insulation material and conductor of the cable. High temperature will cause the cable insulation material to age, become brittle, and even melt, increasing the risk of cable faults. Low temperature may make the cable insulation material harden, affecting its flexibility and reliability.

[0070] The environmental parameters of the cable equipment within the current monitoring period are recorded as the current environmental parameters; the current fluctuation range of the associated cable equipment within the current monitoring period is recorded as the current current range; the adjacent environmental parameters refer to the parameter values of the cable trench environment when the cable equipment is operating safely; the adjacent current range refers to the current fluctuation range when the cable equipment is operating safely; record the current fluctuation range when the cable equipment is operating safely and the parameter values of the cable trench environment, and transmit the recorded data to the data management unit for subsequent acquisition.

[0071] Denote the adjacent environmental parameters obtained in the first adjacent period as the first adjacent parameter, the adjacent environmental parameters obtained in the second adjacent period as the second adjacent parameter, and the adjacent environmental parameters obtained in the third adjacent period as the third adjacent parameter; similarly, denote the adjacent current ranges obtained in the first adjacent period, the second adjacent period, and the third adjacent period as the first adjacent range, the second adjacent range, and the third adjacent range respectively.

[0072] For example, to determine the alarm threshold of the cable equipment in the cable trench of a community where the number of households has stabilized in July 2024, denote the current fluctuation range of the cable equipment from July 1, 2024 to July 31, 2024 as the current current range, denote the environmental parameters of the cable equipment from July 1, 2024 to July 31, 2024 as the current environmental parameters, and denote the current fluctuation ranges monitored in June 2024, May 2024, and April 2024 as the first adjacent range, the second adjacent range, and the third adjacent range respectively; denote the environmental parameters monitored in June 2024, May 2024, and April 2024 as the first adjacent parameter, the second adjacent parameter, and the third adjacent parameter respectively.

[0073] By obtaining the adjacent environmental parameters and the adjacent current range, it can more intuitively reflect the change of the current fluctuation range of the cable equipment with the environmental parameters.

[0074]

Fourth Embodiment

[0075] See Figure 3 , in a specific embodiment, calculate the correlation coefficient of the associated cable equipment in the current monitoring period according to the adjacent current range and the adjacent environmental parameters of the associated cable equipment, which specifically includes:

[0076] S410. Obtain the adjacent current range of the associated cable equipment in the target time period, denoted as the first adjacent fluctuation coefficient, and obtain the adjacent environmental parameters in the cable trench where the associated cable equipment is located in the target time period, denoted as the second adjacent fluctuation coefficient;

[0077] S420. Calculate the correlation coefficient of the current monitoring period according to the first adjacent fluctuation coefficient and the second adjacent fluctuation coefficient.

[0078] In steps S410 and S420, the target time period refers to the adjacent monitoring periods of the associated cable equipment in at least the most recent three months. Obtain the adjacent current ranges and adjacent environmental parameters of the associated cable equipment in at least the most recent three months. Generally, the power consumption of the power consumption area varies with time. Through data of at least three consecutive months, the change trend of the data can be observed, thereby reducing the interference of accidental factors. Taking a certain community as an example, its power consumption also changes with the change of the weather temperature.

[0079] For example, to calculate the correlation coefficient of the associated cable equipment in a certain community in August 2023, it is necessary to obtain the first adjacent range, the second adjacent range, and the third adjacent range of the associated cable equipment. Then, sort them in ascending order, take one value every five values, and record the finally obtained array as the adjacent fluctuation coefficient one; it is also necessary to obtain the first adjacent parameter, the second adjacent parameter, and the third adjacent parameter of the associated cable equipment, and take the adjacent environmental parameter corresponding to the adjacent fluctuation coefficient one, and record the finally obtained array as the adjacent fluctuation coefficient two; calculate the correlation coefficient of the current monitoring period of the associated cable equipment according to the adjacent fluctuation coefficient one and the adjacent fluctuation coefficient two.

[0080] Determine the impact of the change in the power consumption equipment in the control area on the working current of the cable equipment through the adjacent fluctuation coefficient one, and determine the impact brought by the change in the working environment of the cable equipment through the adjacent fluctuation coefficient two. After combining the adjacent fluctuation coefficient one and the adjacent fluctuation coefficient two, it is possible to more intuitively obtain the relationship between the current fluctuation range of the cable equipment and the environmental parameters in the cable trench, making the obtained correlation coefficient more in line with the actual working conditions of the cable equipment.

[0081]

Fifth Embodiment

[0082] In a specific embodiment, calculating the correlation coefficient of the associated cable equipment in the current monitoring period according to the adjacent fluctuation coefficient one and the adjacent fluctuation coefficient two specifically includes:

[0083] The calculation formula for the correlation coefficient of the associated cable equipment in the current monitoring period is as follows:

[0084]

[0085] Among them, is the correlation coefficient, and are respectively the current value and the environmental parameter value of the th sample point, and are respectively the mean values of the current value and the environmental parameter value, and are respectively the standard deviations of the current value and the environmental parameter value, is the number of samples.

[0086] For example, taking temperature as an example, calculate the correlation coefficient of the associated cable equipment in a community with a stable number of households in July 2024. The adjacent fluctuation coefficients of the associated cable equipment are (25A, 27A, 30A, 31A, 32.8A, 32A), and the adjacent fluctuation coefficients of the associated cable equipment are (22°C, 23°C, 22.8°C, 23°C, 23.1°C, 24°C). Substitute the above data into the above formula. After detailed calculation, the obtained correlation coefficient is approximately: r≈0.75.

[0087] By taking values at different sample points, the correlation coefficient can be made more in line with the actual situation.

[0088]

Sixth Embodiment

[0089] In a specific embodiment, calculate the current safety range of the associated cable equipment according to the correlation coefficient, and adjust the current safety range according to the maintenance records, specifically including:

[0090] S610. Obtain the historical monitoring period corresponding to the current monitoring period, denoted as the comparison monitoring period, obtain the environmental parameters of the comparison monitoring period, denoted as the comparison environmental parameters, and obtain the current range of the comparison monitoring period, denoted as the comparison current range;

[0091] S620. Calculate the current safety range of the associated cable equipment according to the comparison current range and the comparison environmental parameters;

[0092] S630. Obtain the maintenance records of the associated cable equipment within the target time, and correct the current safety range according to the maintenance records to obtain the corrected safety range;

[0093] S640. Obtain the real-time current result of the associated cable equipment within the current monitoring period, and calculate the updated safety range according to the real-time current result and the corrected safety range.

[0094] In step S610, when the month of the historical monitoring period is the same as that of the current monitoring period, the historical monitoring period is denoted as the comparison monitoring period of the current monitoring period. For example, the comparison monitoring periods of a certain small town in June 2024 are: June 2023, June 2022, June 2021, etc.

[0095] In step S640, for the situation mentioned in step S300, for some areas with large changes in the current, it is necessary to update the corrected safety range to obtain an updated safety range that conforms to the current working state, and reduce the impact brought by the change in the power supply within the controlled area.

[0096] The setting of the current monitoring period and the comparison monitoring period enables the cable equipment to be compared with its original working state, obtaining a more accurate change trend. By obtaining the comparison environmental parameters, it provides a judgment index for the working state of the cable equipment in the current monitoring period. By obtaining the current fluctuation range, the fluctuation situation of the cable equipment during its historical operation can be intuitively reflected. The correction of the safety range setting improves the accuracy of the intelligent monitoring unit in monitoring the cable equipment.

[0097]

Seventh Embodiment

[0098] Refer to Figure 3 , in a specific embodiment, the current safety range of the associated cable equipment is calculated according to the comparison current range and the comparison environmental parameters, which specifically includes:

[0099] S621. Obtain the comparison current range in the comparison time period, denoted as the first comparison fluctuation coefficient, and obtain the comparison environmental parameters in the comparison time period, denoted as the second comparison fluctuation coefficient;

[0100] S622. Initially divide the current safety range of the associated cable according to the first comparison fluctuation coefficient, denoted as the first safety range;

[0101] S623. Predict the environmental parameters in the cable trench where the associated cable is located in the current monitoring period according to the second comparison fluctuation coefficient, denoted as the predicted second fluctuation coefficient. Calculate the current fluctuation range of the associated cable equipment according to the correlation coefficient and the predicted second fluctuation coefficient, denoted as the second safety range;

[0102] S624. Obtain the current safety range according to the first safety range and the second safety range.

[0103] In step S621, the comparison time period refers to the comparison monitoring periods of three consecutive years. Generally, the electricity usage in each region changes over the years. Through data of at least three consecutive years, the change trend of the data can be observed, thereby reducing the interference of accidental factors. Taking a new industrial park as an example, in the initial stage of construction and operation of a new industrial park, the demand for power resources will gradually increase. As enterprises and facilities in the park are gradually put into use, the power load will also show an upward trend year by year.

[0104] By observing the change range of the adjacent current of the associated cable equipment for three consecutive years, the current fluctuation range of the current monitoring period can be initially obtained. Usually, the change range of the adjacent current of the associated cable equipment is generally divided into three situations. The first is an upward trend, the second is a downward trend, and the third is a fluctuating trend. The first situation generally occurs in new industrial areas or new communities. Taking a new industrial area as an example, various factories in the industrial area will introduce new power-consuming equipment, resulting in an increase in power consumption within the new industrial area, and the corresponding current of the cable equipment will also increase. Taking a new community as an example, in previous years, the number of residents gradually increased, and the power-consuming equipment in each household also increased, resulting in an increase in the power consumption of the entire community. These situations will cause the current fluctuation range to change according to the first situation. The second situation generally occurs in old villages. Taking an old village as an example, with the loss of the permanent population, the power-consuming equipment in each household will also decrease, resulting in a decrease in the power consumption of the entire village. This situation will cause the current fluctuation range to change according to the second situation. The third situation generally occurs in mature industrial parks or communities with a stable resident population. Taking a community with a stable resident population as an example, usually, in a community with a stable population, the power-consuming equipment in each household is relatively stable, so the power consumption of the entire community also tends to be stable. This situation will cause the current fluctuation range to change according to the third situation.

[0105] It should be noted that for some newly developed industrial areas, when associated cable equipment with a working duration of more than three years cannot be found within the control area, associated cable equipment can be found in adjacent control areas according to the control level and rated current.

[0106] In step S623, usually, the change range of the environmental parameters in the cable trench is usually affected by various factors, including climate change, groundwater flow, soil composition change, and nearby construction activities. For example, new road construction may cause the air circulation around the cable trench to become worse, resulting in a decrease in the heat dissipation effect of the cable. By observing the change range of the adjacent environmental parameters of the associated cable equipment for three consecutive years, the environmental parameter value of the current monitoring period can be predicted.

[0107] In step S623, taking temperature as an example, the calculation formula for the second safety range is:

[0108] ;

[0109] Among them, is the correlation coefficient, the mean value of the first adjacent fluctuation coefficient, is the standard deviation of the first adjacent fluctuation coefficient, is the temperature, that is, the predicted second fluctuation coefficient, is the mean value of the predicted fluctuation coefficient two, is the standard deviation of the predicted fluctuation coefficient two.

[0110] For example, when is 50A, is 0.8, is 7A, is 5℃, is 36℃, and T is 43℃, the predicted safe current should be 57.84A. In this case, when the ambient temperature in the cable trench reaches 43℃, the current safety range of the associated cable equipment should not exceed 57.84A.

[0111] Take the smaller current range between the first safety range and the second safety range to obtain the current safety range for the current monitoring period.

[0112] Obtaining the current safety range based on the first safety range and the second safety range fully considers the influence of the current change trend and the cable trench environment. By comparing the previous and current working states of the cable equipment, the accuracy of judging the working state of the cable equipment is improved.

[0113]

Eighth Embodiment

[0114] Refer to Figure 4 , in a specific embodiment, obtain the maintenance records of the associated cable equipment within the target time, and correct the current safety range according to the maintenance records to obtain the corrected safety range, which specifically includes:

[0115] S631. According to the maintenance records of the associated cable equipment within the target time, obtain the number of maintenance times of the associated cable equipment and the corresponding maintenance reasons for each maintenance time. Screen the maintenance times according to the maintenance reasons to obtain the effective times and the ineffective times;

[0116] S632. Correct the current safety range according to the effective times to obtain the corrected safety range.

[0117] In step S631, generally, when a cable equipment fails, it can be divided into self-failure and passive failure. Among them, self-failure means that the cable itself is damaged, and passive failure means that the cable equipment is open-circuited due to the failure of other cables. Therefore, it is necessary to screen the maintenance times, exclude the maintenance times due to passive failure, that is, the ineffective times, and only count the maintenance times due to self-failure, that is, the effective times.

[0118] In step S632, obtain the maintenance records of the associated equipment and the current fluctuation range of the associated equipment after maintenance within the first adjacent period, the second adjacent period, and the third adjacent period, and obtain the influence of the effective maintenance times on the current fluctuation, which is recorded as the correction factor.

[0119] The influence of the effective repair times on the current fluctuation range varies depending on the type and quality of the repair. Generally speaking, as the number of repairs increases, the performance of the cable equipment gradually deteriorates, and the current fluctuation range will gradually increase. Usually, the correction factor has the following three forms:

[0120] The first type: linear growth correction factor.

[0121] Assuming that the influence of the effective repair times on the current fluctuation is linear, the correction factor can be expressed as: .

[0122] Where: is the growth rate of the current fluctuation range caused by the repair, which reflects the influence of each repair on the current fluctuation range, is the effective repair times.

[0123] The second type: exponential correction factor.

[0124] If the performance degradation of the cable after repair is more significant, the influence of each repair on the current fluctuation range may increase exponentially, and an exponential function can be used as the correction factor: .

[0125] Where: is the growth rate of the current fluctuation range caused by the repair, is the effective repair times, is the base of the natural logarithm, representing exponential growth.

[0126] The third type: logarithmic correction factor.

[0127] If the influence of the number of repairs gradually slows down after a higher number of times, a logarithmic function can be used to represent it: .

[0128] Where: is the growth rate of the current fluctuation range caused by the repair, is the effective repair times, is the logarithm to the base 10 or the natural logarithm, which is selected according to the actual situation.

[0129] The calculation formula for the corrected safety range is as follows: .

[0130] Where: is the corrected current fluctuation range, is the original current fluctuation range, that is, the current fluctuation without repair, f(n): the influence function of the number of repairs on the current fluctuation range.

[0131] For example, the maximum value of the initial current fluctuation range = 10 A, and each repair will increase the current fluctuation range by 5%, that is, k = 0.05. After 3 effective repairs, the current fluctuation range is:

[0132] Linear growth correction factor:

[0133] ; .

[0134] That is = 1.15, = 11.5 A.

[0135] Exponential growth correction factor:

[0136] Similarly, = 1.1618, = 11.618 A.

[0137] Logarithmic growth correction factor:

[0138] Similarly, = 1.0301, = 10.301 A.

[0139] It should be noted that if the current of the cable equipment after repair does not show abnormal fluctuations, the current safety range will not be corrected.

[0140] Obtain the real-time current result of the cable equipment in the current monitoring period, and compare the real-time current result with the corrected safety range; when the real-time current result is outside the corrected safety range, obtain the installation location of the cable equipment and send an alarm message; when the real-time current result is within the corrected safety range, update the corrected safety range according to the correlation coefficient and maintenance records to obtain the updated safety range.

[0141] When a new effective repair occurs to the associated cable equipment in the current monitoring period, the number of new effective repairs is included in the above calculation formula to obtain the updated safety range.

[0142] By monitoring the current fluctuation of the associated cable equipment after repair, three different correction factors are obtained, which fully consider the impact of different repair effects on the cable equipment. The acquisition of maintenance records fully considers the working state of the cable equipment before the current monitoring period. The setting of the corrected safety range also improves the accuracy of the intelligent monitoring unit for monitoring the cable equipment.

[0143]

Ninth Embodiment

[0144] In a specific embodiment, the real-time current result of the associated cable device in the current monitoring period is obtained, and the updated safety range is calculated according to the real-time current result and the corrected safety range, which specifically includes:

[0145] S641. When the real-time current result is outside the corrected safety range, obtain the installation location of the associated cable device and send an alarm message;

[0146] S642. When the real-time current result is within the corrected safety range, update the corrected safety range according to the correlation coefficient and the maintenance record to obtain the updated safety range.

[0147] In step S641, during the current monitoring period, the working current of the cable device is obtained in real time to obtain the real-time current result. When the real-time current result is within the corrected safety range, the cable device can work continuously and stably. When the real-time current result is outside the corrected safety range, the cable device may malfunction during operation, and the staff needs to repair the cable device in time.

[0148] Updating the setting of the safety range enables the cable device to adjust the corrected safety range in a timely manner according to the current change trend, improving the compatibility and practicability of the intelligent monitoring unit.

[0149]

Embodiment 10

[0150] Refer to Figure 5 , the present invention also provides a monitoring system 100. The cable trench operation and maintenance status monitoring method described in the above embodiments is applied to the monitoring system 100. The monitoring system 100 includes: a storage module 110, and a data management unit is arranged in the storage module 110; a collection module 120, the collection module 120 is used to collect the rated current of the cable device in the management and control area; a calculation module 130, the calculation module 130 is used to calculate the current safety range; a judgment module 140, the judgment module 140 is used to judge whether there is a fault risk in the cable device. The monitoring system 100 has all the technical features of the above cable trench operation and maintenance status monitoring method, which will not be elaborated here one by one.

[0151] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

1. A cable trench operation and maintenance status monitoring method, characterized in that: Monitoring methods include: The environment in the cable trench is monitored by an intelligent monitoring unit to obtain environmental parameters, and the environmental parameters are sent to a data management unit; Dividing the cable trench into multiple control areas, and determining the control level of the cable equipment in the control area according to the loss situation; Acquire a historical monitoring period adjacent to the current monitoring period from the data management unit, record it as an adjacent monitoring period, record the environmental parameter of the adjacent monitoring period as an adjacent environmental parameter, and record the current fluctuation range of the adjacent monitoring period as an adjacent current range; The cable equipment with the same rated current and the same control level in the control area is recorded as associated cable equipment; Calculate the correlation coefficient of the associated cable equipment in the current monitoring period according to the adjacent current range and the adjacent environmental parameter of the associated cable equipment; The current safety range of the associated cable equipment is calculated according to the association coefficient, and the current safety range is adjusted according to the maintenance record.

2. The monitoring method according to claim 1, characterized in that: The step of dividing the cable trench into a plurality of control areas and determining the control level of the cable equipment in the control area according to the loss of the cable equipment specifically includes: The loss value of the cable equipment is obtained by manual measurement after each cycle. According to the loss value of the cable equipment, the cable equipment is divided into a plurality of control levels. The larger the loss value is, the larger the corresponding control level is.

3. The monitoring method according to claim 2, characterized in that: The acquiring of a historical monitoring period adjacent to the current monitoring period from the data management unit, recording the historical monitoring period as an adjacent monitoring period, recording the environmental parameter of the adjacent monitoring period as an adjacent environmental parameter, and recording the current fluctuation range of the adjacent monitoring period as an adjacent current range, specifically includes: Divide each natural year into multiple target monitoring cycles, record the target monitoring cycle in which the current natural day is located as the current monitoring cycle, and record the target monitoring week before the current natural day as the historical monitoring cycle; Filter out the historical monitoring periods adjacent to the current monitoring period, record them as the adjacent monitoring periods, obtain the environmental parameters of the cable equipment in the adjacent monitoring periods, obtain the adjacent environmental parameters, obtain the current extreme values ​​of the cable equipment in the adjacent monitoring periods, and obtain the adjacent current range.

4. The monitoring method according to claim 3, characterized in that: The calculating the correlation coefficient of the associated cable equipment in the current monitoring period according to the adjacent current range and the adjacent environmental parameter of the associated cable equipment specifically includes: Obtaining the adjacent current range of the associated cable equipment in the target time period, recorded as adjacent fluctuation coefficient one; Acquire the adjacent environmental parameters in the cable trench where the associated cable equipment is located during the target time period, recorded as adjacent fluctuation coefficient 2; The correlation coefficient of the associated cable equipment in the current monitoring period is calculated based on the adjacent fluctuation coefficient one and the adjacent fluctuation coefficient two.

5. The monitoring method according to claim 4, characterized in that: The calculating the correlation coefficient of the associated cable equipment in the current monitoring period according to the adjacent fluctuation coefficient 1 and the adjacent fluctuation coefficient 2 specifically includes: The calculation formula of the correlation coefficient of the associated cable equipment in the current monitoring period is as follows: in, is the correlation coefficient, and They are The current value and environmental parameter value of each sample point, and are respectively the means of the current value and the environmental parameter value, and are the standard deviations of the current value and the environmental parameter value, respectively, is the sample size.

6. The monitoring method according to claim 5, characterized in that: The step of calculating the current safety range of the associated cable equipment according to the association coefficient and adjusting the current safety range according to the maintenance record specifically includes: Obtain the historical monitoring period corresponding to the current monitoring period, recorded as a comparison monitoring period, obtain the environmental parameter of the comparison monitoring period, recorded as a comparison environmental parameter, obtain the current fluctuation range of the comparison monitoring period, recorded as a comparison current range; Calculate the current safety range of the associated cable equipment according to the comparison current range and the comparison environmental parameters; Obtaining maintenance records of the associated cable equipment within a target time, and correcting the current safety range according to the maintenance records to obtain a corrected safety range; The real-time current result of the associated cable equipment in the current monitoring period is obtained, and the safety range is updated according to the real-time current result and the modified safety range calculation.

7. The monitoring method according to claim 6, characterized in that: The calculating the current safety range of the associated cable equipment according to the comparison current range and the comparison environmental parameter specifically includes: Obtaining the comparison current range in the comparison time period, recorded as comparison fluctuation coefficient one, and obtaining the comparison environment parameter in the comparison time period, recorded as comparison fluctuation coefficient two; Preliminarily dividing the current safety range of the associated cable according to the comparison fluctuation coefficient 1, which is recorded as safety range 1; Predicting the environmental parameters in the cable trench where the associated cable is located during the current monitoring period according to the comparison fluctuation coefficient 2, recorded as the predicted fluctuation coefficient 2; Calculate the current fluctuation range of the associated cable equipment according to the correlation coefficient and the second predicted fluctuation coefficient, and record it as the second safety range; The current safety range is obtained according to the safety range one and the safety range two.

8. The monitoring method according to claim 7, characterized in that: The obtaining of the maintenance record of the associated cable equipment within the target time, and correcting the current safety range according to the maintenance record to obtain the corrected safety range specifically includes: According to the maintenance record of the associated cable equipment within the target time, the maintenance times of the associated cable equipment and the maintenance reasons corresponding to each of the maintenance times are obtained; Screening the maintenance times according to the maintenance reasons to obtain valid times and invalid times; The current safety range is corrected according to the valid number of times to obtain the corrected safety range.

9. The monitoring method according to claim 8, characterized in that: The obtaining of the real-time current result of the associated cable equipment in the current monitoring period, and calculating and updating the safety range according to the real-time current result and the modified safety range specifically includes: When the real-time current result is outside the corrected safety range, obtaining the installation location of the associated cable equipment and issuing an alarm message; When the real-time current result is within the modified safety range, the modified safety range is updated according to the correlation coefficient and the maintenance record to obtain an updated safety range.

10. A monitoring system, characterized in that: The cable trench operation and maintenance status monitoring method according to any one of claims 1 to 9 is applied to the monitoring system, and the monitoring system comprises: A storage module, wherein the data management unit is arranged in the storage module; A collection module, the collection module is used to collect the rated current of the cable equipment in the control area; A calculation module, the calculation module is used to calculate the current safety range; A judgment module is used to judge whether the cable equipment has a failure risk.

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