Cable trench operation and maintenance state monitoring method and monitoring system

Abstract

The invention relates to the technical field of cable trench management and control, in particular to a cable trench operation and maintenance state monitoring method and system, and aims to solve the problem of how to correct an alarm threshold value of a working environment of cable equipment according to a loss state of the cable equipment. The invention provides a cable trench operation and maintenance state monitoring method, which comprises the steps of dividing a cable trench into a plurality of management and control areas, determining management and control grades of cable equipment in the management and control areas according to loss conditions, marking the cable equipment with the same rated current and the same management and control grade in the management and control areas as associated cable equipment, and storing the associated cable equipment in the management and control areas; and calculating a current safety range of the associated cable equipment according to the association coefficient, and adjusting the current safety range according to the maintenance record.

Description

Technical Field

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

[0002] The temperature and humidity of the cable trench are high, the environment is complex, the cable ages quickly, and fires are prone to occur. However, due to the special environment, structure and use requirements of the cable trench, maintenance work is often full of challenges. Traditional cable trench maintenance relies on manual inspection and cannot achieve all-weather, real-time monitoring and monitoring. If there is a problem inside the cable trench, the time cycle of manual inspection often cannot find the problem in time, resulting in potential safety hazards not being dealt with for a long time. Therefore, intelligent monitoring of the operation and maintenance status of the cable trench is imminent. The working current of the cable is usually used as the basis for judging the operation and maintenance status of the cable trench. However, there are some obvious limitations when judging the operation and maintenance status of the cable by current. The fluctuation of current is not only affected by the health status of the cable itself, but also by various factors such as the external environment and load fluctuations. Therefore, it is a technical problem that technicians in this field urgently need to solve to correct the alarm threshold according to the health status of the cable itself and its working environment. Solving this problem can improve the efficiency and accuracy of risk assessment and monitoring of cable trenches, and allow staff to find abnormal cables in time, thereby leaving sufficient time for repairs for staff and reducing losses caused by untimely warnings. Summary of the invention

[0003] The problem solved by the present invention is: how to correct the alarm threshold of the working environment of the cable device according to the loss state of the cable device itself.

[0004] To solve the above problems, an embodiment of the present invention provides a cable trench operation and maintenance status monitoring method, the monitoring method comprising: 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 control areas, and determining the control level of the cable equipment in the control area according to the loss situation; obtaining historical monitoring periods adjacent to the current monitoring period from the data management unit, recording them as adjacent monitoring periods, recording the environmental parameters of the adjacent monitoring periods as adjacent environmental parameters, and recording the current fluctuation range of the adjacent monitoring periods as adjacent current ranges; recording the cable equipment with the same rated current and the same control level in the 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 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 record.

[0005] Compared with the existing technology, the technical effects achieved by adopting this technical solution are as follows: the setting of multiple control areas makes the control of cable equipment more reasonable, the setting of control levels makes the cable equipment more targeted during control, the setting of correlation coefficients combines the same control level with different change trends to obtain a current safety range that meets the working status of the cable equipment itself, making it easier to control the cable equipment in the control area, and the acquisition of maintenance records fully considers the working status of the cable equipment before the current monitoring cycle.

[0006] In one embodiment of the present invention, the cable trench is divided into a plurality of control areas, and the control level of the cable equipment in the control area is determined according to the loss situation of the cable equipment, specifically including: a method of obtaining the loss value of the cable equipment, which is obtained by manual measurement after the end of each cycle; according to the size of the loss value of the cable equipment, the cable equipment is divided into a plurality of control levels, and the larger the loss value, the larger the corresponding control level.

[0007] Compared with the existing technology, the technical effect achieved by adopting this technical solution is as follows: by obtaining the loss value of the cable equipment, the loss situation of the cable equipment in this cycle can be obtained after the end of each cycle, and the recent working status of each working cable can be understood in time. The setting of multiple control areas combined with the control level fully considers the impact of different working areas, making the cable equipment more targeted during control.

[0008] In one embodiment of the present invention, historical monitoring periods adjacent to the current monitoring period are obtained from a data management unit and recorded as adjacent monitoring periods, environmental parameters of adjacent monitoring periods are recorded as adjacent environmental parameters, and current fluctuation ranges of adjacent monitoring periods are recorded as adjacent current ranges, specifically including: dividing each natural year into multiple target monitoring periods, recording the target monitoring period of the current natural day as the current monitoring period, and recording the target monitoring week before the current natural day as the historical monitoring period; screening out historical monitoring periods adjacent to the current monitoring period and recording them as adjacent monitoring periods, obtaining environmental parameters of cable equipment in adjacent monitoring periods to obtain adjacent environmental parameters, obtaining current extreme values ​​of cable equipment in adjacent monitoring periods to obtain adjacent current ranges.

[0009] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: by obtaining adjacent environmental parameters and adjacent current ranges, it is more intuitive to reflect how the current fluctuation range of the cable equipment changes with the environmental parameters.

[0010] In one embodiment of the present invention, the correlation coefficient of the associated cable equipment in the current monitoring period is calculated based on the adjacent current range and adjacent environmental parameters of the associated cable equipment, specifically including: obtaining the adjacent current range of the associated cable equipment in the target time period, recorded as adjacent fluctuation coefficient one; obtaining the adjacent environmental parameters in the cable trench where the associated cable equipment is located in the target time period, recorded as adjacent fluctuation coefficient two; calculating the correlation coefficient of the associated cable equipment in the current monitoring period based on the adjacent fluctuation coefficient one and the adjacent fluctuation coefficient two.

[0011] Compared with the existing technology, the technical effect achieved by adopting this technical solution is as follows: the influence of the change of electrical equipment in the control area on the working current of the cable equipment is determined by the adjacent fluctuation coefficient 1, and the influence of the change of the working environment of the cable equipment is determined by the adjacent fluctuation coefficient 2. After combining the adjacent fluctuation coefficient 1 and the adjacent fluctuation coefficient 2, the relationship between the current fluctuation range of the cable equipment and the environmental parameters in the cable trench can be more intuitively obtained, so that the obtained correlation coefficient is more in line with the actual working conditions of the cable equipment.

[0012] In one embodiment of the present invention, the correlation coefficient of the associated cable equipment in the current monitoring period is calculated according to the adjacent fluctuation coefficient 1 and the adjacent fluctuation coefficient 2, specifically including: 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 the means of current value and environmental parameter value respectively, and are the standard deviations of current and environmental parameter values, is the sample size.

[0013] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: by taking values ​​from different sample points, the correlation coefficient is made more consistent with the actual situation.

[0014] 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 record, specifically including: obtaining the historical monitoring period corresponding to the current monitoring period, recorded as the comparison monitoring period, obtaining the environmental parameters of the comparison monitoring period, recorded as the comparison environmental parameters, obtaining the current range of the comparison monitoring period, recorded 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 record of the associated cable equipment within the target time, and correcting the current safety range according to the maintenance record to obtain a corrected safety range; obtaining the real-time current result of the associated cable equipment in the current monitoring period, and updating the safety range according to the real-time current result and the corrected safety range calculation.

[0015] Compared with the existing technology, the technical effect achieved by adopting this technical solution is as follows: the setting of the current monitoring cycle and the comparison monitoring cycle allows the cable equipment to be compared with the original working status to obtain a more accurate change trend. By obtaining the comparison environmental parameters, it provides a judgment indicator for the working status of the cable equipment in the current monitoring cycle. By obtaining the current fluctuation range, it can intuitively reflect the fluctuation of the cable equipment in the historical working process. The setting of the correct safety range improves the accuracy of the intelligent monitoring unit in monitoring the cable equipment.

[0016] In one embodiment of the present invention, the current safety range of the associated cable equipment is calculated based on the comparison current range and the comparison environmental parameters, specifically including: obtaining the comparison current range of the comparison time period, recorded as comparison fluctuation coefficient one, obtaining the comparison environmental parameters of 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 one, recorded as 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, recorded as 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, recorded as safety range two; and obtaining the current safety range according to safety range one and safety range two.

[0017] Compared with the existing technology, the technical effect achieved by adopting this technical solution is as follows: the current safety range is obtained based on safety range one and safety range two, the impact of the current change trend and the environment in the cable trench is fully considered, and the accuracy of judging the working status of the cable equipment is improved by comparing the working status of the cable equipment one after another.

[0018] In one embodiment of the present invention, the maintenance record of the associated cable equipment within the target time is obtained, and the current safety range is corrected according to the maintenance record to obtain a corrected safety range, specifically including: according to the maintenance record of the associated cable equipment within the target time, the number of maintenance of the associated cable equipment and the maintenance reason corresponding to each maintenance number are obtained; the maintenance number is screened according to the maintenance reason to obtain a valid number and an invalid number; the current safety range is corrected according to the valid number to obtain a corrected safety range.

[0019] Compared with the existing technology, the technical effect achieved by adopting this technical solution is as follows: the acquisition of maintenance records fully considers the working status of the cable equipment before the current monitoring cycle, and the setting of the correct safety range also improves the accuracy of the intelligent monitoring unit's monitoring of the cable equipment.

[0020] In one embodiment of the present invention, the real-time current result of the associated cable equipment in the current monitoring period is obtained, and the safety range is updated based on the real-time current result and the modified safety range calculation, specifically including: when the real-time current result is outside the modified safety range, the installation location of the associated cable equipment is obtained, and an alarm message is issued; 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.

[0021] Compared with the existing technology, the technical effect achieved by adopting this technical solution is: updating the setting of the safety range, allowing the cable equipment to timely adjust the correct safety range according to the current change trend, and improving the compatibility and practicality of the intelligent monitoring unit.

[0022] 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 recorded in the above embodiment is applied to the monitoring system, and the monitoring system includes: a storage module, and a data management unit is arranged in the storage module; an acquisition module, and the acquisition module is used to collect the rated current of the cable equipment in the control area; a calculation module, and the calculation module is used to calculate the current safety range; a judgment module, and the judgment module is used to judge whether there is a failure risk of the cable equipment. The monitoring system has all the technical features of the above-mentioned cable trench operation and maintenance status monitoring method, which will not be repeated here one by one. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings to be used in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Figure 1 This is one of the flow charts of the cable trench operation and maintenance status monitoring method of the present invention; Figure 2 This is the second flow chart of the cable trench operation and maintenance status monitoring method of the present invention; Figure 3 This is the third flow chart of the cable trench operation and maintenance status monitoring method of the present invention; Figure 4 This is the fourth flow chart of the cable trench operation and maintenance status monitoring method of the present invention; Figure 5 is a system schematic diagram of the monitoring system of the present invention; Description of reference numerals: 100 - monitoring system; 110 - storage module; 120 - acquisition module; 130 - calculation module; 140 - judgment module. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] [First embodiment] See also Figure 1 In a specific embodiment, the present invention provides a method for monitoring the operation and maintenance status of a cable trench, the monitoring method comprising: S100, monitoring the environment in the cable trench through an intelligent monitoring unit, obtaining environmental parameters, and sending the environmental parameters to a data management unit; S200, 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; S300, obtaining from the data management unit a historical monitoring period adjacent to the current monitoring period, recording the historical monitoring period as an adjacent monitoring period, recording the environmental parameters 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; S400, recording the cable equipment with the same rated current and the same control level in the control area as associated cable equipment; S500, calculating the correlation coefficient of the associated cable equipment in the current monitoring period according to the adjacent current range and adjacent environmental parameters of the associated cable equipment; S600. Calculate the current safety range of the associated cable equipment according to the association coefficient, and adjust the current safety range according to the maintenance record.

[0026] 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. 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.

[0027] In step S300, a natural year is divided into twelve monitoring cycles according to months. The month in which the current natural day is located is recorded as the current monitoring cycle, and the month before the current natural day is recorded as the historical monitoring cycle. When the historical monitoring cycle is adjacent to the month of the current monitoring cycle, the historical monitoring cycle is recorded as the adjacent monitoring cycle of the current monitoring cycle. The current fluctuation range refers to the maximum and minimum values ​​reached by the current value of the cable equipment in adjacent monitoring cycles.

[0028] It should be noted that when the cable equipment is damaged during adjacent monitoring cycles, the current will be zero. 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.

[0029] In steps S400 and S500, usually, the electricity usage of various regions will change over the years. Taking a new industrial zone as an example, each factory in the industrial zone will introduce new power-consuming equipment, resulting in an increase in power consumption within the new industrial zone, and the corresponding current of the cable equipment will also increase. Taking a new residential area as an example, in the past few years, the number of users moving in has gradually increased, and the power-consuming equipment in each household has also been upgraded, resulting in an increase in power consumption of the entire residential area. These situations will cause the current fluctuation range to change.

[0030] The specifications of cable equipment used in different areas may be different. Therefore, when predicting the current safety range, priority is given to cable equipment with the same rated current and the same control level, that is, associated cable equipment. The correlation coefficient of the current monitoring cycle is obtained based on the power consumption of the associated cable equipment, so that the current safety range is more in line with the actual working conditions of the cable equipment in the control area.

[0031] In step S600, usually, the current fluctuation of the repaired cable equipment during operation will be more severe. In order to avoid the impact of large fluctuations on the working state of the cable equipment, the current safety range needs to be corrected according to the maintenance record.

[0032] 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 level with different change trends to obtain a current safety range that meets the working status of the cable equipment itself, making it easier to control cable equipment in the control area. The acquisition of maintenance records fully considers the working status of the cable equipment before the current monitoring cycle.

[0033] [Second embodiment] In a specific embodiment, the cable trench is divided into a plurality of control areas, and the control level of the cable equipment in the control area is determined according to the loss of the cable equipment, specifically including: S210, a method for obtaining the loss value of the cable equipment is to obtain the loss value by manual measurement after each cycle ends; S220. According to the loss value of the cable equipment, the cable equipment is divided into multiple control levels. The larger the loss value, the larger the corresponding control level.

[0034] In step S210, the loss value is usually obtained through actual manual measurement, which can be used to reflect the health status of the cable, the load level and the possible failure risk in the future. Under normal circumstances, the loss value of the cable equipment can be measured once a year, but if the use conditions of the cable equipment are more special, or there are factors such as excessive load and harsh environment, the measurement frequency can be appropriately increased.

[0035] In step S220, the classification of control levels according to the loss value of the cable equipment helps to determine the operation safety of the cable, the required maintenance frequency and the possible failure risk. The higher the loss value, the worse the health of the cable and the higher the management requirements. Generally, the control levels of cable equipment can be divided into the following three levels: Level 1: The loss value is low, the cable equipment operates well and meets standard specifications.

[0036] Level 2: There is a certain increase in loss value. The cable equipment may be in an overloaded state or the operating environment is not good, and regular inspection and monitoring are required.

[0037] Level 3: The loss value is high, and the cable equipment may show signs of failure and needs to be repaired or replaced.

[0038] For example, level 1: the loss value is less than 10% of the rated loss value, and the cable equipment is in good operating condition; Level 2: The loss value is between 10% and 20% of the rated loss value. The cable equipment begins to show signs of overload or poor environment and needs regular inspection. Level 3: The loss value is between 20% - 30% of the rated loss value. The cable equipment shows signs of overload or aging, which may cause failure and require maintenance or replacement.

[0039] When the rated loss value of the cable equipment is 100W, when the loss value of the cable equipment is 5W, which is lower than 10% of the rated loss, the cable operates well. When the loss value of the cable equipment is 15W, which exceeds 10% of the rated loss but is lower than 20% of the rated loss, the cable equipment begins to show signs of overload or poor environment and requires regular inspection. When the loss value of the cable equipment is 25W, which exceeds 20% of the rated loss but is lower than 30% of the rated loss, it indicates that the cable equipment has signs of overload or aging, which may cause failures and require maintenance or replacement.

[0040] By obtaining the loss value of cable equipment, the loss situation of cable equipment within this cycle can be obtained after the end of each cycle, and the recent working status of each working cable can be understood in time. The setting of multiple control areas combined with the control level fully considers the impact of different working areas, making the cable equipment more targeted during management and control.

[0041] [Third embodiment] See also Figure 2 In a specific embodiment, a historical monitoring period adjacent to the current monitoring period is obtained from the data management unit and recorded as an adjacent monitoring period, an environmental parameter of the adjacent monitoring period is recorded as an adjacent environmental parameter, and a current fluctuation range of the adjacent monitoring period is recorded as an adjacent current range, specifically including: S310, dividing each natural year into multiple target monitoring cycles, recording the target monitoring cycle of the current natural day as the current monitoring cycle, and recording the target monitoring week before the current natural day as the historical monitoring cycle; S320, filter out the historical monitoring periods corresponding to the current monitoring period, record them as adjacent monitoring periods, obtain environmental parameters of the cable equipment in the adjacent monitoring periods, obtain adjacent environmental parameters, obtain current extreme values ​​of the cable equipment in the adjacent monitoring periods, and obtain adjacent current ranges.

[0042] In step S310, the target monitoring cycle is usually divided according to the month, and a natural year is divided into twelve target monitoring cycles according to the month. The month of the current natural day is recorded as the current monitoring cycle, and the month before the current natural day is recorded as the historical monitoring cycle. When the historical monitoring cycle is adjacent to the month of the current monitoring cycle, the historical monitoring cycle is recorded as the adjacent monitoring cycle of the current monitoring cycle; usually, the power consumption of the cable is usually affected by the season. In general, the months with higher power consumption usually occur in summer and winter, because the frequency of use of power-consuming equipment is higher in these two seasons, especially in extreme temperature conditions. Taking summer as an example, in order to keep the room cool, the use of air conditioning and cooling equipment 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.

[0043] Adjacent monitoring cycles are named as the first adjacent cycle, the second adjacent cycle, the third adjacent cycle, etc. according to the length of time from the current monitoring cycle. For example, in order to determine the alarm threshold of cable equipment in the cable trench of a community in July 2024, July 1, 2024 to July 31, 2024 is recorded as the current monitoring cycle, the dates before July 1, 2024 are recorded as the historical monitoring cycle, and the monitoring cycles of June 2024, May 2024, and April 2024 are recorded as the first adjacent cycle, the second adjacent cycle, and the third adjacent cycle, respectively. In step S320, the current extreme value refers to the maximum and minimum values ​​reached by the current value of the cable equipment in adjacent monitoring cycles. Normally, the performance of the cable equipment in the cable trench is affected by environmental parameters such as the temperature, humidity, ventilation conditions, ultraviolet radiation and soil pH in the cable trench. Taking temperature as an example, too high or too low temperature will affect the electrical properties of the cable's insulation materials and conductors. High temperature will cause the cable insulation material to age, become brittle, or even melt, increasing the risk of cable failure. Low temperature may harden the cable's insulation material, affecting its flexibility and reliability.

[0044] The environmental parameters of the cable equipment during the current monitoring period are recorded as the current environmental parameters; the current fluctuation range of the associated cable equipment during the current monitoring period is recorded as the current current range; the adjacent environmental parameters refer to the parameter values ​​of the environment in the cable trench when the cable equipment is operating safely; the adjacent current range refers to the current fluctuation range of the cable equipment when operating safely; the current fluctuation range of the cable equipment during safe operation and the parameter values ​​of the environment in the cable trench are recorded, and the recorded data is transmitted to the data management unit for subsequent retrieval.

[0045] The adjacent environmental parameters obtained in the first adjacent period are recorded as the first adjacent parameters, the adjacent environmental parameters obtained in the second adjacent period are recorded as the second adjacent parameters, and the adjacent environmental parameters obtained in the third adjacent period are recorded as the third adjacent parameters; similarly, the adjacent current ranges obtained in the first adjacent period, the second adjacent period, and the third adjacent period are recorded as the first adjacent range, the second adjacent range, and the third adjacent range, respectively.

[0046] For example, in order to determine the alarm threshold of the cable equipment in the cable trench in July 2024 in a community where the number of households has stabilized, the current fluctuation range of the cable equipment from July 1, 2024 to July 31, 2024 is recorded as the current current range, the environmental parameters of the cable equipment from July 1, 2024 to July 31, 2024 are recorded as the current environmental parameters, the current fluctuation ranges monitored in June 2024, May 2024 and April 2024 are recorded as the first adjacent range, the second adjacent range and the third adjacent range, respectively; the environmental parameters monitored in June 2024, May 2024 and April 2024 are recorded as the first adjacent parameter, the second adjacent parameter and the third adjacent parameter, respectively.

[0047] By obtaining adjacent environmental parameters and adjacent current ranges, the current fluctuation range of the cable equipment can be more intuitively reflected as the environmental parameters change.

[0048] [Fourth embodiment] See also Figure 3In a specific embodiment, the correlation coefficient of the associated cable equipment in the current monitoring period is calculated according to the adjacent current range and adjacent environmental parameters of the associated cable equipment, specifically including: S410, obtaining an adjacent current range of an associated cable device in a target time period, recorded as adjacent fluctuation coefficient one, and obtaining an adjacent environmental parameter in a cable trench where the associated cable device in the target time period is located, recorded as adjacent fluctuation coefficient two; S420. Calculate the correlation coefficient of the current monitoring period according to the adjacent fluctuation coefficient one and the adjacent fluctuation coefficient two.

[0049] In steps S410 and S420, the target time period refers to the adjacent monitoring period of the associated cable equipment for at least the last three months, and the adjacent current range and adjacent environmental parameters of the associated cable equipment for at least the last three months are obtained. Generally, the power consumption in the power consumption area will vary with time. By using data for at least three consecutive months, the changing trend of the data can be observed, thereby reducing the interference of accidental factors. Taking a certain community as an example, as the weather temperature changes, its power consumption will also change.

[0050] For example, to calculate the correlation coefficient of the associated cable equipment of a 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, and then sort them in ascending order, take one of every five values, and record the final 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, take the adjacent environmental parameters corresponding to the adjacent fluctuation coefficient one, and record the final array as the adjacent fluctuation coefficient two; calculate the correlation coefficient of the current monitoring period of the associated cable equipment based on the adjacent fluctuation coefficient one and the adjacent fluctuation coefficient two.

[0051] The influence of the change of electrical equipment in the control area on the working current of the cable equipment is determined by the adjacent fluctuation coefficient 1, and the influence of the change of the working environment of the cable equipment is determined by the adjacent fluctuation coefficient 2. After combining the adjacent fluctuation coefficient 1 and the adjacent fluctuation coefficient 2, the relationship between the current fluctuation range of the cable equipment and the environmental parameters in the cable trench can be obtained more intuitively, so that the obtained correlation coefficient is more in line with the actual working conditions of the cable equipment.

[0052] [Fifth embodiment] In a specific embodiment, 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 the means of current value and environmental parameter value respectively, and are the standard deviations of current and environmental parameter values, is the sample size.

[0053] For example, taking temperature as an example, the correlation coefficient of the associated cable equipment in a community where the number of households has stabilized in July 2024 is calculated. The adjacent fluctuation coefficient one of the associated cable equipment is (25A, 27A, 30A, 31A, 32.8A, 32A), and the adjacent fluctuation coefficient two of the associated cable equipment is (22℃, 23℃, 22.8℃, 23℃, 23.1℃, 24℃). Substituting the above data into the above formula and after detailed calculation, the obtained correlation coefficient is approximately: r≈0.75.

[0054] By taking values ​​from different sample points, the correlation coefficient can be made more consistent with the actual situation.

[0055] [Sixth embodiment] In a specific embodiment, 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, specifically including: S610, obtaining a historical monitoring period corresponding to the current monitoring period, recorded as a comparison monitoring period, obtaining an environmental parameter of the comparison monitoring period, recorded as a comparison environmental parameter, and obtaining a current range of the comparison monitoring period, recorded as a comparison current range; S620, calculating a current safety range of the associated cable equipment according to the comparison current range and the comparison environmental parameters; S630, obtaining maintenance records of associated cable equipment within a target time, and correcting the current safety range according to the maintenance records to obtain a corrected safety range; S640. Obtain the real-time current result of the associated cable equipment in the current monitoring cycle, and update the safety range based on the real-time current result and the revised safety range calculation.

[0056] In step S610, when the historical monitoring cycle is the same as the month of the current monitoring cycle, the historical monitoring cycle is recorded as the comparison monitoring period of the current monitoring cycle. For example, the comparison monitoring period of a small town in June 2024 is: June 2023, June 2022, June 2021, etc.

[0057] In step S640, in response to the situation mentioned in step S300, for some areas where the current changes greatly, it is necessary to update the corrected safety range to obtain an updated safety range that conforms to the current working status, so as to reduce the impact of changes in power supply in the control area.

[0058] The setting of the current monitoring cycle and the comparative monitoring cycle allows the cable equipment to be compared with the original working status to obtain a more accurate trend of change. By obtaining comparative environmental parameters, it provides a judgment indicator for the working status of the cable equipment in the current monitoring cycle. By obtaining the current fluctuation range, it can intuitively reflect the fluctuation of the cable equipment in the historical working process. The setting of the correct safety range improves the accuracy of the intelligent monitoring unit's monitoring of the cable equipment.

[0059] [Seventh embodiment] See also 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, specifically including: S621, obtaining a comparison current range in a comparison time period, recorded as comparison fluctuation coefficient 1, and obtaining a comparison environmental parameter in a comparison time period, recorded as comparison fluctuation coefficient 2; S622, preliminarily dividing the current safety range of the associated cables according to the comparison of the fluctuation coefficient one, and recording it as safety range one; S623, 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 2, recorded as the predicted fluctuation coefficient 2, and calculating the current fluctuation range of the associated cable equipment according to the correlation coefficient and the predicted fluctuation coefficient 2, recorded as the safety range 2; S624. Obtain a current safety range according to the safety range one and the safety range two.

[0060] In step S621, the comparison time period refers to a comparison monitoring cycle of three consecutive years. Generally, the electricity usage in various regions will change over the years. By using data for at least three consecutive years, the changing trend of the data can be observed, thereby reducing the interference of accidental factors. Taking a new industrial area as an example, the demand for electricity resources will gradually increase in the initial stage of construction and operation of the new industrial area. As enterprises and facilities in the park are gradually put into use, the power load will also show an increasing trend year by year.

[0061] By observing the change range of the adjacent current range of the associated cable equipment for three consecutive years, we can preliminarily get the current fluctuation range of the current monitoring period. Usually, the change range of the adjacent current range of the associated cable equipment is generally divided into three situations. The first one is an upward trend, the second one is a downward trend, and the third one is a fluctuating trend. The first situation generally occurs in new industrial areas or new communities. Taking the new industrial area as an example, each factory 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 the new community as an example, in the past few years, the number of users moving in has gradually increased, and the power-consuming equipment in each household will also be improved, resulting in an increase in power consumption in the entire community. These situations will cause the current fluctuation range to follow the first one. The second situation generally occurs in old villages. Taking old villages as an example, with the loss of permanent population, the power-consuming devices 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 population. Taking communities with a stable population as an example, under normal circumstances, in a community with a stable population, the power-consuming devices in each household are 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.

[0062] It should be noted that for some newly developed industrial areas, if it is impossible to find associated cable equipment with a working time of more than three years in the control area, associated cable equipment can be found in adjacent control areas based on the control level and rated current.

[0063] In step S623, under normal circumstances, the change range of environmental parameters in the cable trench is usually affected by multiple factors, including climate change, groundwater flow, changes in soil composition, and nearby construction activities. For example, new road construction may cause the air circulation around the cable trench to deteriorate, thereby reducing the heat dissipation effect of the cable. By observing the change range of adjacent environmental parameters of associated cable equipment for three consecutive years, the environmental parameter values ​​of the current monitoring period can be predicted.

[0064] In step S623, taking temperature as an example, the calculation formula of the safety range 2 is: ; in, is the correlation coefficient, The mean of adjacent volatility coefficients, is the standard deviation of adjacent volatility coefficients, is the temperature, i.e. the predicted fluctuation coefficient of two, is the mean of the predicted volatility coefficient 2, is the standard deviation of the predicted volatility factor two.

[0065] For example, when is 50A, is 0.8, 7A, 5℃, When A is 36°C and T is 43°C, the predicted safe current should be 57.84A. In this case, when the ambient temperature in the cable trench reaches 43°C, the current safety range of the associated cable equipment should not exceed 57.84A.

[0066] Take the smaller current range between safety range 1 and safety range 2 to obtain the current safety range of the current monitoring cycle.

[0067] The current safety range is obtained based on safety range one and safety range two, which fully considers the impact of current change trend and the environment in the cable trench. By comparing the working conditions of the cable equipment one after another, the accuracy of judging the working condition of the cable equipment is improved.

[0068] [Eighth embodiment] See also Figure 4 In a specific embodiment, the maintenance records of the associated cable equipment within the target time are obtained, and the current safety range is corrected according to the maintenance records to obtain the corrected safety range, which specifically includes: S631, according to the maintenance records of the associated cable equipment within the target time, obtain the maintenance times of the associated cable equipment and the maintenance reasons corresponding to each maintenance time, and filter the maintenance times according to the maintenance reasons to obtain valid times and invalid times; S632. Correct the current safety range according to the effective number of times to obtain a corrected safety range.

[0069] In step S631, under normal circumstances, when a fault occurs in the cable equipment, it can be divided into an intrinsic fault and a passive fault, wherein an intrinsic fault refers to damage to the cable itself, and a passive fault refers to a situation where the cable equipment is broken due to a fault in other cables. Therefore, it is necessary to screen the number of repairs to exclude the number of repairs due to passive faults, that is, the invalid number of times, and only count the number of repairs caused by intrinsic faults, that is, the valid number of times.

[0070] In step S632, the maintenance records of the associated equipment in the first adjacent period, the second adjacent period and the third adjacent period and the current fluctuation range of the associated equipment after maintenance are obtained to obtain the influence of the effective maintenance times on the current fluctuation, which is recorded as the correction factor.

[0071] The effect of the effective number of repairs on the current fluctuation range varies depending on the type and quality of the repairs. Generally speaking, as the number of repairs increases, the performance of the cable equipment gradually declines and the current fluctuation range gradually increases. Usually, the correction factor has the following three forms: The first one is the linear growth correction factor.

[0072] Assuming that the effect of effective maintenance times on current fluctuation is linear, the correction factor can be expressed as: .

[0073] in: It is the growth rate of the current fluctuation range caused by maintenance, which reflects the impact of each maintenance on the current fluctuation range. is the number of effective repairs.

[0074] The second type: index correction factor.

[0075] If the performance degradation of the cable after repair is more significant, the impact of each repair on the current fluctuation range may increase exponentially. An exponential function can be used as a correction factor: .

[0076] in: is the rate of increase of the current fluctuation range caused by maintenance, is the number of effective repairs, It is the base of the natural logarithm, which represents exponential growth.

[0077] The third type: logarithmic correction factor.

[0078] If the effect of the number of repairs decreases gradually after a higher number, a logarithmic function can be used to represent it: .

[0079] in: is the rate of increase of the current fluctuation range caused by maintenance, is the number of effective repairs, It is the logarithm with base 10 or the natural logarithm, which can be selected according to the actual situation.

[0080] The calculation formula for the modified safety range is as follows: .

[0081] in: is the corrected current fluctuation range, is the original current fluctuation range, i.e. the current fluctuation without maintenance, f(n): the influence function of the number of maintenance times on the current fluctuation range. For example, the maximum value of the initial current fluctuation range is =10A, and each maintenance will increase the current fluctuation range by 5%, that is, k = 0.05. After 3 effective maintenance, the current fluctuation range is: Linear growth correction factor: ; .

[0082] Right now =1.15, =11.5A.

[0083] Exponential growth correction factor: Similarly, =1.1618, = 11.618A.

[0084] Logarithmic growth correction factor: Similarly, =1.0301, = 10.301A.

[0085] It should be noted that if the current of the cable equipment after maintenance does not fluctuate abnormally, the current safety range will not be corrected.

[0086] The real-time current result of the cable equipment in the current monitoring period is obtained, and the real-time current result is compared with the corrected safety range; when the real-time current result is outside the corrected safety range, the installation location of the cable equipment is obtained, and an alarm message is issued; when the real-time current result is within the corrected safety range, the corrected safety range is updated according to the correlation coefficient and maintenance record to obtain an updated safety range. When new effective maintenance occurs to the associated cable equipment during the current monitoring period, the new effective maintenance times are included in the above calculation formula to obtain an updated safety range.

[0087] By monitoring the current fluctuations of related cable equipment after maintenance, three different correction factors are obtained, which fully considers the impact of different maintenance effects on cable equipment. The acquisition of maintenance records fully considers the working status of the cable equipment before the current monitoring cycle. The setting of the corrected safety range also improves the accuracy of the intelligent monitoring unit's monitoring of cable equipment.

[0088] [Ninth embodiment] In a specific embodiment, obtaining the real-time current result of the associated cable equipment in the current monitoring cycle, and calculating and updating the safety range according to the real-time current result and the modified safety range specifically includes: S641. When the real-time current result is outside the corrected safety range, the installation location of the associated cable equipment is obtained, and an alarm message is issued; S642. When the real-time current result is within the corrected safety range, the corrected safety range is updated according to the correlation coefficient and the maintenance record to obtain an updated safety range.

[0089] In step S641, during the current monitoring cycle, the working current of the cable equipment is acquired in real time to obtain the real-time current result. When the real-time current result is within the corrected safety range, the cable equipment can continue to work stably. When the real-time current result is outside the corrected safety range, the cable equipment may fail during operation, requiring staff to repair the cable equipment in a timely manner.

[0090] Updating the safety range settings allows cable equipment to timely adjust the correct safety range according to current changing trends, improving the compatibility and practicality of the intelligent monitoring unit.

[0091] [Tenth embodiment] See also Figure 5 The present invention also provides a monitoring system 100. The cable trench operation and maintenance status monitoring method described in the above embodiment 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, and the collection module 120 is used to collect the rated current of the cable equipment in the control area; a calculation module 130, and the calculation module 130 is used to calculate the current safety range; a judgment module 140, and the judgment module 140 is used to judge whether there is a failure risk of the cable equipment. The monitoring system 100 has all the technical features of the above cable trench operation and maintenance status monitoring method, which will not be repeated here one by one.

[0092] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on 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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