Cable joint looseness detection system and method

Abstract

The embodiment of the invention discloses a cable joint looseness detection system and method, and the method comprises the steps: obtaining the electrical parameter data, joint temperature parameter data and environment parameter data of a to-be-detected cable joint every preset period, and enabling the electrical parameter data to comprise the monitoring values of different types of electrical parameters; obtaining pre-stored initial record data, determining an influence change value of each electrical parameter according to the joint temperature parameter data, the environment parameter data and the initial record data, and determining an initial record value corresponding to each electrical parameter in the initial record data, and determining a comparison threshold value of each electrical parameter according to the initial record value and the influence change value corresponding to each electrical parameter, and performing comparison processing based on each comparison threshold value and each monitoring value to obtain a looseness detection result of the to-be-detected cable joint. According to the scheme, the electrical parameter comparison threshold value of the connector looseness detection is determined through the change of the electrical parameter influence factors, and the rationality and accuracy of the cable connector looseness detection can be improved.

Description

Technical Field

[0001] This application relates to the field of cable testing technology, and in particular to a cable joint loosening detection system and method. Background Art

[0002] A cable joint is a device used to connect two cable segments. It is typically located at the ends of the two cables and serves to connect, extend, and isolate the cables. During production and maintenance, cable joints often become loose due to issues such as weak welds, mechanical vibration, and thermal expansion. This can lead to decreased power supply reliability, voltage imbalance, and reduced efficiency of electrical equipment. Loose cable joints are a common electrical fault with significant potential hazards. Therefore, it is essential to conduct regular loosening checks and repair cable joints promptly to ensure the safe and reliable operation of power facilities.

[0003] In the related technologies, most of them determine whether the cable joint is loose by photographing it with a camera and identifying the looseness of the cable joint image. This method has low accuracy in determining whether the cable joint is loose, lacks a reasonable detection method for loose cable joints, and cannot ensure the safe and reliable operation of power facilities. Summary of the Invention

[0004] The embodiments of the present invention provide a system and method for detecting loose cable joints, which solve the problems in the related art of low accuracy in determining whether a cable joint is loose, lack of a reasonable detection method for loose cable joints, and inability to ensure the safe and reliable operation of power facilities. The system and method can improve the rationality and accuracy of loose cable joint detection.

[0005] In a first aspect, embodiments of the present invention provide a method for detecting loose cable joints, comprising:

[0006] Acquire electrical parameter data, joint temperature parameter data, and environmental parameter data at the cable joint to be tested at preset intervals, wherein the electrical parameter data includes monitoring values ​​of various types of electrical parameters;

[0007] Obtaining pre-stored initial recorded data, and determining the impact change value of each of the electrical parameters based on the joint temperature parameter data, the environmental parameter data, and the initial recorded data, wherein the initial recorded data includes initial recorded values ​​of various different types of parameters;

[0008] Determine the initial recorded value corresponding to each of the electrical parameters in the initial recorded data, determine the comparison threshold of each of the electrical parameters according to the initial recorded value corresponding to each of the electrical parameters and the impact change value, and perform comparison processing based on each of the comparison thresholds and each of the monitoring values ​​to obtain the looseness detection result of the cable joint to be tested.

[0009] Optionally, the joint temperature parameter data includes a skin temperature parameter value and an internal temperature parameter value, and the environmental parameter data includes collected values ​​of different types of environmental parameters. The determining of the impact change value of each electrical parameter based on the joint temperature parameter data, the environmental parameter data, and the initial recorded data includes:

[0010] Determining respectively the initial recorded values ​​corresponding to the skin temperature parameter value, the internal temperature parameter value, and each environmental parameter in the initial recorded data, and calculating the difference between the collected values ​​of the skin temperature parameter value, the internal temperature parameter value, and each environmental parameter and the corresponding initial recorded values, wherein the difference includes positive and negative values;

[0011] The skin temperature parameter value, the internal temperature parameter value, and preset weights corresponding to various environmental parameters are obtained, and the impact change value of each electrical parameter is determined according to each difference and the corresponding preset weight.

[0012] Optionally, determining the impact change value of each electrical parameter according to each difference and a corresponding preset weight includes:

[0013] According to each of the differences, the corresponding preset electrical parameter influence comparison table is queried respectively to obtain multiple influence change values ​​to be calculated for each of the electrical parameters, and the multiple influence change values ​​to be calculated for the electrical parameters are multiplied by the corresponding preset weights and superimposed to obtain the corresponding influence change values, which include positive values ​​and negative values.

[0014] Optionally, performing comparison processing based on each of the comparison thresholds and each of the monitoring values ​​to obtain a looseness detection result of the cable connector to be tested includes:

[0015] Each of the monitoring values ​​is compared with the corresponding comparison threshold to obtain multiple comparison results, and it is determined whether each of the comparison results meets the corresponding preset abnormal conditions. Based on the determination result and the preset joint looseness condition, the looseness detection result of the cable joint to be tested is determined.

[0016] Optionally, determining the looseness detection result of the cable joint to be tested based on the determination result and a preset joint looseness condition includes:

[0017] If each of the comparison results meets the corresponding preset anomaly conditions, calculate the difference between each of the monitored values ​​and the corresponding comparison threshold, and compare each of the differences with the corresponding preset error value.

[0018] If each of the difference values ​​is greater than the corresponding preset error value, it is determined that the cable connector to be tested is loose; otherwise, it is determined that the cable connector to be tested is not loose.

[0019] Optionally, performing comparison processing based on each of the comparison thresholds and each of the monitoring values ​​to obtain a looseness detection result of the cable connector to be tested includes:

[0020] Each of the monitored values ​​is compared with the corresponding comparison threshold to obtain multiple comparison results. It is determined whether each of the comparison results meets the corresponding preset anomaly conditions, and the number of comparison results that meet the corresponding preset anomaly conditions is counted.

[0021] A looseness detection result of the cable joint to be tested is determined based on the quantity and a preset joint looseness condition.

[0022] Optionally, determining a looseness detection result of the cable connector to be tested based on the quantity and a preset connector looseness condition includes:

[0023] If the number is greater than the preset number, calculate the difference between each monitoring value that does not meet the corresponding preset abnormal condition and the corresponding comparison threshold. If the difference is less than the corresponding preset difference, determine that the cable connector under test is loose; otherwise, determine that the cable connector under test is not loose.

[0024] In a second aspect, an embodiment of the present invention further provides a cable joint loosening detection system, comprising:

[0025] The acquisition module is used to acquire electrical parameter data, joint temperature parameter data and environmental parameter data at the cable joint under test at preset intervals. The electrical parameter data includes the monitoring values ​​of various types of electrical parameters.

[0026] The acquisition module is further used to acquire pre-stored initial record data;

[0027] The influence determination module is used to determine the influence change value of each of the electrical parameters based on the joint temperature parameter data, the environmental parameter data, and the initial recorded data, wherein the initial recorded data includes the initial recorded values ​​of each different type of parameter;

[0028] The comparison threshold determination module is used to determine the initial record value corresponding to each electrical parameter in the initial record data, and to determine the comparison threshold of each electrical parameter based on the initial record value corresponding to each electrical parameter and the influence change value.

[0029] The loosening result determination module is used to perform comparison processing based on each of the comparison thresholds and each of the monitoring values ​​to obtain a loosening detection result of the cable joint to be tested.

[0030] In a third aspect, an embodiment of the present invention further provides a cable connector loosening detection device, the device comprising:

[0031] one or more processors;

[0032] a storage device for storing one or more programs,

[0033] When the one or more programs are executed by the one or more processors, the one or more processors implement a method for detecting a loose cable joint according to an embodiment of the present invention.

[0034] Fourthly, embodiments of the present invention also provide a storage medium for storing computer-executable instructions, which, when executed by a computer processor, are used to execute a cable joint loosening detection method described in embodiments of the present invention.

[0035] In an embodiment of the present invention, electrical parameter data, joint temperature parameter data, and environmental parameter data at the cable joint to be tested are obtained at preset intervals, the electrical parameter data including monitoring values ​​of various types of electrical parameters, pre-stored initial recorded data are obtained, and the influence change value of each electrical parameter is determined based on the joint temperature parameter data, environmental parameter data, and initial recorded data, the initial recorded data including initial recorded values ​​of various types of parameters, the initial recorded value corresponding to each electrical parameter in the initial recorded data is determined, and the comparison threshold value of each electrical parameter is determined based on the initial recorded value and the influence change value corresponding to each electrical parameter, and the looseness detection result of the cable joint to be tested is obtained by comparison processing based on each comparison threshold value and each monitoring value. This solution determines the electrical parameter comparison threshold value for loose cable joint detection by changes in electrical parameter influencing factors, solves the problems in the related art of low accuracy in determining whether a cable joint is loose, lacking a reasonable detection method for loose cable joints, and failing to ensure safe and reliable operation of power facilities, and can improve the rationality and accuracy of loose cable joint detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A flowchart of a method for detecting loose cable joints provided by an embodiment of the present invention;

[0037] Figure 2 A flowchart of another cable joint loosening detection method provided in an embodiment of the present invention;

[0038] Figure 3 A flowchart of another cable joint loosening detection method provided in an embodiment of the present invention;

[0039] Figure 4 A flowchart of another cable joint loosening detection method provided in an embodiment of the present invention;

[0040] Figure 5 A module structure block diagram of a cable joint loosening detection system provided in an embodiment of the present invention;

[0041] Figure 6 This is a schematic diagram of a cable joint loosening detection device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0042] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the embodiments of the present invention and are not intended to limit the embodiments of the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions of the embodiments of the present invention, rather than all structures.

[0043] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the terms "and or or" in the specification and claims represent at least one of the connected objects, and the character "or" generally indicates that the objects connected are in an "or" relationship.

[0044] The embodiment of the present application provides a method for detecting loose cable joints, which can be applied to the detection scenario of loose cable joints. The embodiment of the present application provides a method for detecting loose cable joints, in which the execution subject of each step can be a computer device, which refers to any electronic device with data calculation, processing and storage capabilities, such as a mobile phone, PC (Personal Computer), tablet computer and other terminal devices, or a server and other devices, which are not limited in the embodiment of the present application.

[0045] Figure 1 A flowchart of a cable joint loosening detection method provided by an embodiment of the present invention is shown below. Figure 1As shown, specifically including:

[0046] Step S101: Acquire electrical parameter data, joint temperature parameter data, and environmental parameter data at the cable joint under test at preset intervals. The electrical parameter data includes the monitoring values ​​of various types of electrical parameters.

[0047] Among them, the preset period can be a pre-set interval time for obtaining various detection data at the cable joint to be tested. The cable joint to be tested is used to characterize the cable joint waiting to be tested for looseness. The electrical parameter data is used to characterize the monitoring data of parameters of various electrical characteristics and performances of the cable joint to be tested. The electrical parameters can be parameters such as voltage and current. The joint temperature parameter data can be relevant collected data of the temperature at the cable joint to be tested. The environmental parameter data can be collected data of various environmental parameters at the cable joint to be tested. An exemplary example can be that the preset period is 1 hour, the last acquisition time of the cable joint a to be tested is 9 o'clock, and the current time is 10 o'clock, then the electrical parameter data, joint temperature parameter data and environmental parameter data at the cable joint a to be tested are obtained.

[0048] Step S102: Obtain pre-stored initial recording data, and determine the influence change value of each electrical parameter based on the connector temperature parameter data, the environmental parameter data, and the initial recording data. The initial recording data includes the initial recording values ​​of each different type of parameter.

[0049] Among them, the initial recorded data can be the initial recorded values ​​of various relevant parameters at the cable joint to be tested. The initial recorded values ​​are used to characterize the numerical values ​​of the parameters when the cable joint to be tested is initially used. The impact change value can be the numerical value of the joint temperature parameter data and the environmental parameter data that causes the electrical parameters to rise or fall. In one embodiment, after obtaining the pre-stored initial recorded data, the initial recorded values ​​corresponding to each joint temperature parameter in the joint temperature parameter data and each environmental parameter in the environmental parameter data in the initial recorded data are determined respectively, and the difference between the collected values ​​of each joint temperature parameter in the joint temperature parameter data and the collected values ​​of each environmental parameter in the environmental parameter data and the corresponding initial recorded values ​​are calculated, and each difference is input into the preset calculation formula corresponding to each electrical parameter to obtain the impact change value of each electrical parameter. Optionally, the connector temperature parameter data includes a skin temperature parameter value and an internal temperature parameter value, and the environmental parameter data includes collected values ​​of different types of environmental parameters. A method for determining the impact change value may be to separately determine the skin temperature parameter value, the internal temperature parameter value, and the initial recorded value corresponding to each environmental parameter in the initial recorded data, calculate the difference between the skin temperature parameter value, the internal temperature parameter value, and the collected value of each environmental parameter and the corresponding initial recorded value, the difference including positive and negative values, obtain the preset weights corresponding to the skin temperature parameter value, the internal temperature parameter value, and each environmental parameter, and determine the impact change value of each electrical parameter based on the respective differences and the corresponding preset weights. By determining the impact change value of each electrical parameter based on the difference between the current values ​​of each connector temperature parameter and each environmental parameter and the corresponding initial values, it is possible to reasonably determine the impact of each electrical influencing factor on the electrical parameters of the cable connector.

[0050] Step S103: determining an initial recorded value corresponding to each electrical parameter in the initial recorded data, and determining a comparison threshold value of each electrical parameter according to the initial recorded value corresponding to each electrical parameter and the impact change value.

[0051] Among them, the comparison threshold value can be a standard value for comparison with the electrical parameters. In one embodiment, after determining the initial recorded value corresponding to each electrical parameter in the initial recorded data, the initial recorded value corresponding to each electrical parameter is superimposed with the corresponding influence change value to obtain the comparison threshold value of each electrical parameter, and the influence change value includes positive and negative values. An exemplary example can be that the electrical parameters include voltage and current, the initial recorded value of the voltage is 10kv, the influence change value is -0.5kv, the initial recorded value of the current is 150A, and the influence change value is -20A, then the comparison threshold value of the voltage is 9.5kv (10-0.5), and the comparison threshold value of the current is 130A (150-20). In another embodiment, the corresponding electrical parameter is determined according to the influence change direction associated with the influence change value, and is added or subtracted therefrom, and the corresponding comparison threshold value is calculated, and the influence change direction includes rising or falling.

[0052] Step S104: performing comparison processing based on each of the comparison thresholds and each of the monitoring values ​​to obtain a looseness detection result of the cable connector to be tested.

[0053] Among them, the loose detection result can be a determination result of whether the cable joint to be tested is loose. In one embodiment, a method for determining the loose detection result can be to compare the monitoring values ​​of each electrical parameter with the corresponding comparison threshold value to obtain multiple comparison results, determine whether each comparison result meets the corresponding preset abnormal condition, and determine the loose detection result of the cable joint to be tested based on the determination result and the preset joint loose condition. In another embodiment, a method for determining the loose detection result can also be to compare the monitoring values ​​of each electrical parameter with the corresponding comparison threshold value to obtain multiple comparison results, determine whether each comparison result meets the corresponding preset abnormal condition, count the number of comparison results that meet the corresponding preset abnormal condition, and determine the loose detection result of the cable joint to be tested based on the number and the preset joint loose condition. By determining whether the cable joint to be tested is loose through the comparison processing results of the monitoring values ​​of each electrical parameter with the corresponding comparison threshold value, the rationality and accuracy of the cable joint loose detection can be improved.

[0054] As described above, electrical parameter data, joint temperature parameter data, and environmental parameter data of the cable joint under test are acquired at preset intervals. The electrical parameter data includes monitoring values ​​of various types of electrical parameters. Pre-stored initial record data is obtained. Based on the joint temperature parameter data, environmental parameter data, and initial record data, the influence change value of each electrical parameter is determined. The initial record data includes initial record values ​​of various types of parameters. The initial record value corresponding to each electrical parameter in the initial record data is determined. Based on the initial record value and influence change value of each electrical parameter, a comparison threshold for each electrical parameter is determined. Based on the comparison thresholds and monitoring values, a comparison process is performed to obtain the loosening detection result of the cable joint under test. This solution determines the electrical parameter comparison threshold for cable joint loosening detection by changing the influencing factors of electrical parameters. This solves the problems of low accuracy in determining whether a cable joint is loose, lack of reasonable detection methods for cable joint loosening, and inability to guarantee the safe and reliable operation of power facilities in related technologies. It can improve the rationality and accuracy of cable joint loosening detection.

[0055] Figure 2 A flowchart of another method for detecting loose cable joints provided by an embodiment of the present invention provides an optional specific method for determining the impact change value, such as Figure 2 As shown, specifically including:

[0056] Step S201: acquiring electrical parameter data, joint temperature parameter data, and environmental parameter data at a cable joint to be tested at every preset period, wherein the electrical parameter data includes monitoring values ​​of various types of electrical parameters.

[0057] Step S202: Obtain pre-stored initial recorded data, determine the skin temperature parameter value, the internal temperature parameter value, and the initial recorded values ​​corresponding to each environmental parameter in the initial recorded data, and calculate the difference between the collected values ​​of the skin temperature parameter value, the internal temperature parameter value, and each environmental parameter and the corresponding initial recorded values, where the difference includes positive and negative values.

[0058] Among them, the joint temperature parameter data includes the skin temperature parameter value and the internal temperature parameter value, and the environmental parameter data includes the collected values ​​of various types of environmental parameters. The skin temperature parameter value is used to characterize the temperature value at the skin of the cable joint. The internal temperature parameter value is used to standardize the temperature value inside the cable joint. An exemplary example can be that the environmental parameters include ambient temperature and ambient humidity. The initial skin temperature parameter value in the initial recorded data is 40°C, the initial internal temperature parameter value is 35°C, the initial ambient temperature is 20°C, and the initial ambient humidity is 20%. The current skin temperature parameter value is 50°C, the internal temperature parameter value is 40°C, the ambient temperature value is 32°C, and the ambient humidity value is 40%. Then the difference between the skin temperature parameter value and the initial skin temperature parameter value is +10°C, the difference between the internal temperature parameter value and the initial internal temperature parameter value is +5°C, the difference between the ambient temperature value and the initial ambient temperature is +12°C, and the difference between the ambient humidity value and the initial ambient humidity is +40%.

[0059] Step S203: Obtain the skin temperature parameter value, the internal temperature parameter value, and the preset weights corresponding to the environmental parameters, and determine the impact change value of each electrical parameter according to each difference and the corresponding preset weight.

[0060] Among them, the preset weight can be the importance of the influence of each preset parameter on the electrical parameter. Optionally, a method for determining the influence change value can be to query the corresponding preset electrical parameter influence comparison table according to each difference value to obtain multiple influence change values ​​to be calculated for each electrical parameter, and multiply the multiple influence change values ​​to be calculated for the electrical parameter with the corresponding preset weight and superimpose them to obtain the corresponding influence change value, and the influence change value includes positive and negative values. An exemplary example can be a preset electrical parameter influence comparison table corresponding to the internal temperature parameter, as shown in the following table:

[0061] Difference Voltage Current (0，+10] -1kv -5A (+10，+20] -2kv -10A (+20，+30] -3kv -15A [-10，0) +1kV +5A [-20，-10) +2kv +10A [-30，-20) +3kv +15A

[0062] The above comparison table describes the relationship between the difference between the internal temperature parameter value and the corresponding initial recorded value, and the calculated changes in voltage and current. Specifically: when the difference between the internal temperature parameter value and the corresponding initial recorded value is within (0, +10], the calculated change in voltage is -1kV, and the calculated change in current is -5A; when the difference is within (+10, +20], the calculated change in voltage is -2kV, and the calculated change in current is -10A; when the difference is within (+20, +30], the calculated change in voltage is... The change value of the voltage is -3kV, and the change value of the current to be calculated is -15A; when the difference between the internal temperature parameter value and the corresponding initial recorded value is within [-10, 0), the change value of the voltage to be calculated is +1kV, and the change value of the current to be calculated is +5A; when the difference between the internal temperature parameter value and the corresponding initial recorded value is within [-20, -10), the change value of the voltage to be calculated is +2kV, and the change value of the current to be calculated is +10A; when the difference between the internal temperature parameter value and the corresponding initial recorded value is within [-30, -20), the change value of the voltage to be calculated is +3kV, and the change value of the current to be calculated is +15A.

[0063] The difference between the current internal temperature parameter value and the corresponding initial recorded value is +12℃. Therefore, the calculated change in voltage is -2kV and the calculated change in current is -10A. Similarly, the calculated change in voltage and current corresponding to the surface temperature parameter is -1kV and -5A, the calculated change in voltage and current corresponding to the ambient temperature parameter is -1kV and -5A, and the calculated change in voltage and current corresponding to the ambient humidity parameter is -2kV and -10A. The preset weights for the surface temperature parameter, internal temperature parameter, ambient temperature, and ambient humidity are 0.3, 0.3, 0.2, and 0.2, respectively. Therefore, the calculated change in voltage is -1.5kV and the change in current is -7.5kV. In another embodiment, the preset intervals into which each difference falls and the impact change values ​​to be calculated of each electrical parameter associated with the preset intervals into which the difference falls are determined, and the multiple impact change values ​​to be calculated of the electrical parameters are multiplied by the corresponding preset weights and superimposed to obtain the corresponding impact change values, which include positive and negative values.

[0064] Step S204: determining an initial recorded value corresponding to each electrical parameter in the initial recorded data, and determining a comparison threshold value of each electrical parameter according to the initial recorded value corresponding to each electrical parameter and the impact change value.

[0065] Step S205: performing comparison processing based on each of the comparison thresholds and each of the monitoring values ​​to obtain a looseness detection result of the cable connector to be tested.

[0066] As can be seen from the above, the initial recorded values ​​corresponding to the skin temperature parameter value, the internal temperature parameter value, and each environmental parameter in the initial recorded data are determined respectively. The difference between the collected values ​​of the skin temperature parameter value, the internal temperature parameter value, and each environmental parameter and the corresponding initial recorded value is calculated. The difference includes positive and negative values. The preset weights corresponding to the skin temperature parameter value, the internal temperature parameter value, and each environmental parameter are obtained. The influence change value of each electrical parameter is determined based on each difference and the corresponding preset weight. This solution determines the influence change value of each electrical parameter by the difference between the current values ​​of each joint temperature parameter and each environmental parameter and the corresponding initial value. It can reasonably determine the impact of each electrical influencing factor on the electrical parameters of the cable joint.

[0067] Figure 3 A flowchart of another cable joint loosening detection method provided by an embodiment of the present invention provides an optional specific method for determining the loosening detection result, such as Figure 3 As shown, specifically including:

[0068] Step S301: Acquire electrical parameter data, joint temperature parameter data, and environmental parameter data at the cable joint under test at preset intervals. The electrical parameter data includes the monitoring values ​​of various types of electrical parameters.

[0069] Step S302: Obtain pre-stored initial recording data, and determine the influence change value of each electrical parameter based on the connector temperature parameter data, the environmental parameter data, and the initial recording data. The initial recording data includes the initial recording values ​​of each different type of parameter.

[0070] Step S303: Determine the initial record value corresponding to each electrical parameter in the initial record data, and determine the comparison threshold of each electrical parameter based on the initial record value corresponding to each electrical parameter and the influence change value.

[0071] Step S304: Compare each of the monitored values ​​with the corresponding comparison thresholds to obtain multiple comparison results, determine whether each of the comparison results meets the corresponding preset abnormal conditions, and determine the looseness detection result of the cable joint under test based on the determined results and the preset joint looseness conditions.

[0072] The preset abnormal conditions can be pre-set conditions for judging whether the comparison results are abnormal. The preset loose joint condition can be a pre-set condition for judging whether the cable joint under test is loose. Optionally, one way to determine the looseness detection result is to calculate the difference between the monitored value of each electrical parameter and the corresponding comparison threshold when all comparison results meet the corresponding preset abnormal conditions, and compare each difference with the corresponding preset error value. If each difference is greater than the corresponding preset error value, it is determined that the cable joint under test is loose; otherwise, it is determined that the cable joint under test is not loose. An exemplary example could be that the voltage monitoring value is 8kV, the comparison threshold is 9kV, and the preset abnormal condition is that the voltage monitoring value is lower than the comparison threshold; the current monitoring value is 110A, the comparison threshold is 130A, and the preset abnormal condition is that the current monitoring value is lower than the comparison threshold. If the comparison results for both voltage and current meet the corresponding preset abnormal conditions, the difference between the voltage monitoring value and the corresponding comparison threshold is 1kV, the difference between the current monitoring value and the corresponding comparison threshold is 20A, the preset error for voltage is 0.5kV, and the preset error for current is 10A. If each difference is greater than the corresponding preset error value, then it is determined that the cable connector under test is loose. In another embodiment, if all comparison results meet the corresponding preset abnormal conditions, it is determined that the cable connector under test is loose; if there are comparison results that do not meet the corresponding preset abnormal conditions, it is determined that the cable connector under test is not loose.

[0073] As described above, by comparing the monitored values ​​of each electrical parameter with their corresponding comparison thresholds, multiple comparison results are obtained. It is then determined whether each comparison result meets the corresponding preset abnormality conditions. Based on these results and the preset looseness conditions, the looseness detection result of the cable joint under test is determined. This solution improves the rationality and accuracy of cable joint looseness detection by determining whether the cable joint under test is loose through the comparison results of the monitored values ​​of each electrical parameter with their corresponding comparison thresholds.

[0074] Figure 4 A flowchart of another cable joint loosening detection method provided by an embodiment of the present invention provides an optional specific method for determining the loosening detection result, such as Figure 4 As shown, specifically including:

[0075] Step S401: acquiring electrical parameter data, joint temperature parameter data, and environmental parameter data at a cable joint to be tested at every preset period, wherein the electrical parameter data includes monitoring values ​​of various types of electrical parameters.

[0076] Step S402: obtaining pre-stored initial recorded data, and determining the impact change value of each electrical parameter according to the joint temperature parameter data, the environmental parameter data and the initial recorded data, wherein the initial recorded data includes initial recorded values ​​of various different types of parameters.

[0077] Step S403: determining an initial recorded value corresponding to each electrical parameter in the initial recorded data, and determining a comparison threshold value of each electrical parameter according to the initial recorded value corresponding to each electrical parameter and the impact change value.

[0078] Step S403: Compare each of the monitoring values ​​with the corresponding comparison threshold value to obtain multiple comparison results, determine whether each of the comparison results meets the corresponding preset abnormal condition, count the number of comparison results that meet the corresponding preset abnormal condition, and determine the loose detection result of the cable joint to be tested based on the number and the preset joint loose condition.

[0079] The preset abnormal condition may be a preset condition for determining whether the comparison result is abnormal. The preset joint loose condition may be a preset condition for determining whether the cable joint to be tested is loose. Optionally, a method for determining the looseness detection result may be, when the number of comparison results that meet the corresponding preset abnormal condition is greater than a preset number, respectively calculating the difference between each monitoring value that does not meet the corresponding preset abnormal condition and the corresponding comparison threshold value. If each difference is less than the corresponding preset difference, it is determined that the cable joint to be tested is loose; otherwise, it is determined that the cable joint to be tested is not loose. An exemplary example may be that the voltage monitoring value is 8kV, the comparison threshold is 9kV, the preset abnormal condition is that the voltage monitoring value is lower than the comparison threshold, the current monitoring value is 110A, the comparison threshold is 130A, the preset abnormal condition is that the current monitoring value is lower than the comparison threshold, the resistance monitoring value is 498MΩ, the comparison threshold is 500MΩ, the preset abnormal condition is that the resistance monitoring value is greater than the comparison threshold, the comparison results corresponding to the voltage and current both meet the corresponding preset abnormal conditions, the comparison result corresponding to the resistance does not meet the corresponding preset abnormal condition, the preset number is 1, the number of comparison results that meet the corresponding preset abnormal condition is 2, which is greater than the preset number, then the difference between the resistance monitoring value and the corresponding comparison threshold is calculated to be 2MΩ, the corresponding preset difference is 5MΩ, and the difference is less than the corresponding preset difference, and it is determined that the cable joint under test is loose. In another embodiment, if the number of comparison results that meet the corresponding preset abnormal condition is greater than the preset number, it is determined that the cable joint under test is loose; otherwise, it is determined that the cable joint under test is not loose.

[0080] As can be seen from the above, the monitored values ​​of each electrical parameter are compared with the corresponding comparison thresholds to obtain multiple comparison results. Whether each comparison result meets the corresponding preset abnormality condition is determined. The number of comparison results that meet the corresponding preset abnormality condition is counted, and the looseness detection result of the cable joint under test is determined based on this number and the preset joint looseness condition. This solution determines whether the cable joint under test is loose by comparing the monitored values ​​of each electrical parameter with the corresponding comparison thresholds, which can improve the rationality and accuracy of loose cable joint detection.

[0081] Figure 5 This is a module structure diagram of a cable joint loosening detection system provided by an embodiment of the present invention. The system is used to execute a cable joint loosening detection method provided by the above embodiment, and has the corresponding functional modules and beneficial effects of the execution method. Figure 5 As shown, the system specifically includes:

[0082] An acquisition module 101 is configured to acquire electrical parameter data, joint temperature parameter data, and environmental parameter data at a cable joint to be tested at predetermined intervals, wherein the electrical parameter data includes monitoring values ​​of various types of electrical parameters;

[0083] The acquisition module 101 is also used to acquire pre-stored initial record data;

[0084] An impact determination module 102 is configured to determine an impact change value of each of the electrical parameters based on the joint temperature parameter data, the environmental parameter data, and the initial recorded data, wherein the initial recorded data includes initial recorded values ​​of various types of parameters;

[0085] a comparison threshold determination module 103, configured to determine an initial recorded value corresponding to each electrical parameter in the initial recorded data, and determine a comparison threshold for each electrical parameter based on the initial recorded value corresponding to each electrical parameter and the impact change value;

[0086] The loosening result determination module 104 is used to obtain the loosening detection result of the cable joint under test by performing comparison processing based on each of the comparison thresholds and each of the monitoring values.

[0087] It can be seen from the above scheme that the electrical parameter data, joint temperature parameter data and environmental parameter data at the cable joint to be tested are obtained at preset intervals, the electrical parameter data include monitoring values ​​of various types of electrical parameters, the pre-stored initial recorded data are obtained, the influence change value of each electrical parameter is determined based on the joint temperature parameter data, environmental parameter data and the initial recorded data, the initial recorded data include initial recorded values ​​of various different types of parameters, the initial recorded values ​​corresponding to each electrical parameter in the initial recorded data are determined, the comparison threshold value of each electrical parameter is determined based on the initial recorded value and the influence change value corresponding to each electrical parameter, and the looseness detection result of the cable joint to be tested is obtained by comparison processing based on each comparison threshold value and each monitoring value. This scheme determines the electrical parameter comparison threshold value for loose cable joint detection by the change of electrical parameter influencing factors, solves the problem of low accuracy in determining whether the cable joint is loose, lack of reasonable detection method for loose cable joints, and inability to ensure safe and reliable operation of power facilities in related technologies, and can improve the rationality and accuracy of loose cable joint detection.

[0088] In a possible embodiment, the impact determination module 102 is specifically configured to:

[0089] Determining respectively the initial recorded values ​​corresponding to the skin temperature parameter value, the internal temperature parameter value, and each environmental parameter in the initial recorded data, and calculating the difference between the collected values ​​of the skin temperature parameter value, the internal temperature parameter value, and each environmental parameter and the corresponding initial recorded values, wherein the difference includes positive and negative values;

[0090] The skin temperature parameter value, the internal temperature parameter value, and preset weights corresponding to various environmental parameters are obtained, and the impact change value of each electrical parameter is determined according to each difference and the corresponding preset weight.

[0091] In a possible embodiment, the impact determination module 102 is further configured to:

[0092] According to each of the differences, the corresponding preset electrical parameter influence comparison table is queried respectively to obtain multiple influence change values ​​to be calculated for each of the electrical parameters, and the multiple influence change values ​​to be calculated for the electrical parameters are multiplied by the corresponding preset weights and superimposed to obtain the corresponding influence change values, which include positive values ​​and negative values.

[0093] In a possible embodiment, the loosening result determination module 104 is specifically configured to:

[0094] Each of the monitoring values ​​is compared with the corresponding comparison threshold to obtain multiple comparison results, and it is determined whether each of the comparison results meets the corresponding preset abnormal conditions. Based on the determination result and the preset joint looseness condition, the looseness detection result of the cable joint to be tested is determined.

[0095] In a possible embodiment, the loosening result determination module 104 is further configured to:

[0096] If each of the comparison results meets the corresponding preset anomaly conditions, calculate the difference between each of the monitored values ​​and the corresponding comparison threshold, and compare each of the differences with the corresponding preset error value.

[0097] If each of the difference values ​​is greater than the corresponding preset error value, it is determined that the cable connector to be tested is loose; otherwise, it is determined that the cable connector to be tested is not loose.

[0098] In a possible embodiment, the loosening result determination module 104 is further configured to:

[0099] Each of the monitored values ​​is compared with the corresponding comparison threshold to obtain multiple comparison results. It is determined whether each of the comparison results meets the corresponding preset anomaly conditions, and the number of comparison results that meet the corresponding preset anomaly conditions is counted.

[0100] A looseness detection result of the cable joint to be tested is determined based on the quantity and a preset joint looseness condition.

[0101] In a possible embodiment, the loosening result determination module 104 is further configured to:

[0102] If the number is greater than the preset number, calculate the difference between each monitoring value that does not meet the corresponding preset abnormal condition and the corresponding comparison threshold. If the difference is less than the corresponding preset difference, determine that the cable connector under test is loose; otherwise, determine that the cable connector under test is not loose.

[0103] Figure 6 A schematic diagram of a cable joint loosening detection device provided by an embodiment of the present invention is shown in FIG. Figure 6 As shown, the device includes a processor 201, a memory 202, an input device 203 and an output device 204; the number of processors 201 in the device can be one or more. Figure 6 In the embodiment, a processor 201 is used as an example; the processor 201, the memory 202, the input device 203 and the output device 204 in the device can be connected by a bus or other means. Figure 6The example of the connection via bus is taken. The memory 202, as a computer-readable storage medium, can be used to store software programs, computer executable programs and modules, such as program instructions or modules corresponding to a loose cable connector detection method in an embodiment of the present invention. The processor 201 executes various functional applications and data processing of the device by running the software programs, instructions and modules stored in the memory 202, that is, realizes the above-mentioned loose cable connector detection method. The input device 203 can be used to receive input digital or character information, and generate key signal input related to the user settings and function control of the device. The output device 204 may include a display device such as a display screen.

[0104] This invention also provides a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to perform a method for detecting loose cable joints, the method comprising:

[0105] Acquire electrical parameter data, joint temperature parameter data, and environmental parameter data at the cable joint to be tested at preset intervals, wherein the electrical parameter data includes monitoring values ​​of various types of electrical parameters;

[0106] Obtaining pre-stored initial recorded data, and determining the impact change value of each of the electrical parameters based on the joint temperature parameter data, the environmental parameter data, and the initial recorded data, wherein the initial recorded data includes initial recorded values ​​of various different types of parameters;

[0107] Determine the initial recorded value corresponding to each of the electrical parameters in the initial recorded data, determine the comparison threshold of each of the electrical parameters according to the initial recorded value corresponding to each of the electrical parameters and the impact change value, and perform comparison processing based on each of the comparison thresholds and each of the monitoring values ​​to obtain the looseness detection result of the cable joint to be tested.

[0108] It is worth noting that in the above-described embodiment of a cable joint loosening detection method system, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of each functional unit are only for easy differentiation and are not used to limit the protection scope of the embodiments of the present invention.

[0109] Note that the above are merely preferred embodiments and the technical principles applied in this invention. Those skilled in the art will understand that the embodiments of this invention are not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of this invention. Therefore, although the embodiments of this invention have been described in detail above, the embodiments of this invention are not limited to the above embodiments. More other equivalent embodiments may be included without departing from the concept of the embodiments of this invention, and the scope of the embodiments of this invention is determined by the scope of the appended claims.

Claims

1. A method for detecting loose cable joints, characterized in that: include: Acquire electrical parameter data, joint temperature parameter data and environmental parameter data at the cable joint to be tested at preset intervals, wherein the electrical parameter data includes monitoring values ​​of different types of electrical parameters; Acquire pre-stored initial recorded data, and determine the impact change value of each of the electrical parameters according to the joint temperature parameter data, the environmental parameter data and the initial recorded data, wherein the initial recorded data includes initial recorded values ​​of each different type of parameter; Determine the initial recorded value corresponding to each of the electrical parameters in the initial recorded data, determine the comparison threshold of each of the electrical parameters according to the initial recorded value corresponding to each of the electrical parameters and the impact change value, and perform comparison processing based on each of the comparison thresholds and each of the monitoring values ​​to obtain the looseness detection result of the cable joint to be tested.

2. The cable joint loosening detection method according to claim 1, characterized in that: The joint temperature parameter data includes a skin temperature parameter value and an internal temperature parameter value, the environmental parameter data includes collected values ​​of different types of environmental parameters, and the determining of the influence change value of each electrical parameter according to the joint temperature parameter data, the environmental parameter data and the initial recorded data includes: Determine respectively the initial recorded values ​​corresponding to the skin temperature parameter value, the internal temperature parameter value and each environmental parameter in the initial recorded data, and calculate the difference between the collected values ​​of the skin temperature parameter value, the internal temperature parameter value and each environmental parameter and the corresponding initial recorded values, wherein the difference includes positive and negative values; The skin temperature parameter value, the internal temperature parameter value and the preset weights corresponding to the various environmental parameters are obtained, and the influence change values ​​of the various electrical parameters are determined according to the various differences and the corresponding preset weights.

3. The cable joint loosening detection method according to claim 2, characterized in that: The determining the influence change value of each electrical parameter according to each difference and the corresponding preset weight includes: According to each of the differences, the corresponding preset electrical parameter influence comparison table is queried respectively to obtain multiple influence change values ​​to be calculated for each of the electrical parameters, and the multiple influence change values ​​to be calculated for the electrical parameters are multiplied by the corresponding preset weights and superimposed to obtain the corresponding influence change values, wherein the influence change values ​​include positive values ​​and negative values.

4. The method for detecting loose cable joints according to any one of claims 1 to 3, characterized in that: The step of performing comparison processing based on each of the comparison thresholds and each of the monitoring values ​​to obtain the looseness detection result of the cable connector to be tested includes: Each of the monitoring values ​​is compared with the corresponding comparison threshold value to obtain multiple comparison results, and it is determined whether each of the comparison results meets the corresponding preset abnormal condition, and the loose detection result of the cable joint to be tested is determined based on the determination result and the preset joint loose condition.

5. The cable joint loosening detection method according to claim 4, characterized in that: The step of determining the looseness detection result of the cable joint to be tested based on the determination result and the preset joint looseness condition includes: When each of the comparison results satisfies the corresponding preset abnormal condition, the difference between each of the monitoring values ​​and the corresponding comparison threshold is calculated, and each of the difference values ​​is compared with the corresponding preset error value; In the case where each of the difference values ​​is greater than the corresponding preset error value, it is determined that the cable connector to be tested is loose; otherwise, it is determined that the cable connector to be tested is not loose.

6. The method for detecting loose cable joints according to any one of claims 1 to 3, characterized in that: The step of performing comparison processing based on each of the comparison thresholds and each of the monitoring values ​​to obtain the looseness detection result of the cable connector to be tested includes: Comparing each of the monitoring values ​​with the corresponding comparison threshold value to obtain a plurality of comparison results, determining whether each of the comparison results satisfies a corresponding preset abnormal condition, and counting the number of comparison results that satisfy the corresponding preset abnormal condition; The looseness detection result of the cable joint to be tested is determined based on the quantity and a preset joint looseness condition.

7. The method for detecting loose cable joints according to claim 6, characterized in that: Determining the looseness detection result of the cable joint to be tested based on the quantity and the preset joint looseness condition includes: When the number is greater than the preset number, the difference between each monitoring value that does not meet the corresponding preset abnormal condition and the corresponding comparison threshold is calculated respectively. When the differences are all less than the corresponding preset differences, it is determined that the cable connector to be tested is loose. Otherwise, it is determined that the cable connector to be tested is not loose.

8. A cable joint loosening detection system, characterized in that: include: An acquisition module, used to acquire electrical parameter data, joint temperature parameter data and environmental parameter data at the cable joint to be tested at preset intervals, wherein the electrical parameter data includes monitoring values ​​of various types of electrical parameters; The acquisition module is also used to acquire pre-stored initial record data; An impact determination module, used to determine the impact change value of each of the electrical parameters according to the joint temperature parameter data, the environmental parameter data and the initial recorded data, wherein the initial recorded data includes the initial recorded values ​​of each different type of parameter; A comparison threshold determination module, used to determine the initial recorded value corresponding to each of the electrical parameters in the initial recorded data, and determine the comparison threshold of each of the electrical parameters according to the initial recorded value corresponding to each of the electrical parameters and the impact change value; The loose result determination module is used to perform comparison processing based on each of the comparison thresholds and each of the monitoring values ​​to obtain the loose detection result of the cable joint to be tested.

9. A cable joint loosening detection device, the device comprising: one or more processors; A storage device for storing one or more programs, when the one or more programs are executed by the one or more processors, the one or more processors implement the cable joint loosening detection method as described in any one of claims 1-7.

10. A storage medium storing computer executable instructions, wherein the computer executable instructions are used to execute the cable joint loosening detection method according to any one of claims 1 to 7 when executed by a computer processor.

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