Detection device and method for distribution network cable joint

Abstract

A detection device and method for a distribution network cable joint belong to the technical field of cable joint detection, a temperature value collection unit, a temperature value performance advanced estimation unit and a temperature value performance control unit are defined, the temperature value of a distribution network cable head is estimated in advance through a cable head detection advanced estimation mode, and when there is a difference, the temperature value of the distribution network cable head is estimated in advance. Performance analysis is performed on the sampling temperature values in sequence according to the sequence of the performance control modes, and the related performance control modes are performed after the performance risks are analyzed, so that the sampling temperature values are ensured to be analyzed and controlled preferentially according to the performance control modes with high performance risks; the method is suitable for advanced estimation improvement of the temperature value of the distribution network cable head; and a temperature value detection improvement unit is defined, the detection and measurement performance of the distribution network cable head can be integrally analyzed according to the performance analysis items, and whether the detection performance of the temperature value of the distribution network cable head of the temperature measurement sensor needs to be improved or not is timely determined.

Description

Technical Field

[0001] The present invention belongs to the technical field of cable joint detection, and in particular relates to a detection device and method for distribution network cable joints. Background Art

[0002] The cable joints of the distribution network are also called distribution network cable heads. After the cable is laid, in order to make it a continuous line, each section of the line must be connected as a whole, and these connection points are called distribution network cable joints. The cable joints in the middle of the cable line are called intermediate joints, and the cable joints at both ends of the line are called terminal heads.

[0003] To ensure that the distribution network cable head works correctly, it is necessary to detect the distribution network cable head. The existing technical solution with patent publication number "CN216746468U" is often used to detect the distribution network cable head. The main thing is that the temperature sensor is connected to the temperature measurement terminal. The temperature sensor is used to sample the temperature value of the distribution network cable head and transmit it to the temperature measurement terminal. The temperature measurement terminal is used to display the collected temperature value of the distribution network cable head, so as to achieve detection of the distribution network cable head.

[0004] However, in actual detection, various interferences may occur that are not conducive to the accuracy of detection, which is in turn not conducive to the performance of the temperature value. Even if relevant advance estimates of the temperature values ​​of the distribution network cable heads can be performed now, due to the limitations of the advance estimation mode itself, the performance of the advance estimated temperature value often also has errors.

[0005] The current method is to use various performance control modes to the specific temperature value to ensure the temperature performance of the specific temperature value when an error occurs between the specific temperature value and the estimated temperature value in advance. However, this type of processing method requires the use of a large and complex performance control mode to process each time a temperature value with an error occurs, resulting in some temperature values ​​being over-processed. The over-processing of temperature values ​​often reduces the original characteristics of the temperature values, and is not conducive to the detection function and timeliness of the temperature values ​​when the processing workload of the temperature measurement terminal is large. Summary of the invention

[0006] In order to solve the defects in the prior art, the present invention proposes a detection device and method for distribution network cable joints, which can ensure that the sampled temperature values ​​are analyzed and controlled preferentially according to the performance control mode with high performance risk, and can timely determine whether the estimated temperature value has an estimated error after all performance control modes are analyzed and controlled, which is convenient for the subsequent estimated improvement of the temperature value of the distribution network cable head; it can also timely determine whether the detection performance of the temperature value of the distribution network cable head of the temperature measuring sensor needs to be improved.

[0007] The present invention uses the following technical solutions.

[0008] A detection method for a distribution network cable joint, comprising:

[0009] The temperature sensor samples the temperature value of the distribution network cable head and transmits it to the temperature measurement terminal. The temperature measurement terminal processes the collected temperature value of the distribution network cable head and displays it, thereby achieving detection of the distribution network cable head;

[0010] The method for the temperature measuring terminal to process the temperature value of the distribution network cable head received includes:

[0011] Step 1: Form a distribution network cable head detection time slot. When the cable head detection time slot is reached, control the temperature sensor to sample the temperature value of the distribution network cable head, and define the temperature value of the distribution network cable head obtained by the temperature sensor as the sampling temperature value;

[0012] Step 2: Obtain the estimated temperature value in advance for the current period, obtain the detection distinction parameter based on the sampled temperature value and the estimated temperature value in advance, define the detection distinction threshold, and define the sampled temperature value as the performance control value when the detection distinction parameter is higher than the detection distinction threshold. When the detection distinction parameter is not higher than the detection distinction threshold, define the sampled temperature value as the performance credible value.

[0013] Step 3: After the sampled temperature value is defined as the performance control value, the performance control sequence code of each performance control mode is obtained, and all the performance control modes are arranged in sequence according to the order of the performance control sequence code, and the performance control values ​​are analyzed in sequence according to the arrangement order of the performance control modes. After each pair of performance control values ​​is subjected to the performance analysis of a type of performance control mode, a performance analysis entry of the performance control mode is formed. The performance analysis entry includes a performance analysis parameter and a performance analysis time point. When forming a performance analysis entry, the performance analysis parameter of the performance analysis entry is obtained, and a performance analysis limit value is defined;

[0014] Step 4: In each time period of size U, obtain the distribution network cable head detection and measurement quantity, define the cable head detection and measurement critical quantity, and when the cable head detection and measurement quantity is not lower than the cable head detection and measurement critical quantity, improve the detection performance of the temperature value of the distribution network cable head of the temperature sensor; when the cable head detection and measurement quantity is lower than the cable head detection and measurement critical quantity, no action is taken.

[0015] Furthermore, in step 2, the method for obtaining the advance estimated temperature value of the current time period includes: obtaining the cable head detection advance estimation mode of the current time period, treating the current time period as the input value of the cable head detection advance estimation mode, and the cable head detection advance estimation mode sends out the advance estimated temperature value of the current time period.

[0016] Further, in step 2, the cable head detection advance estimation mode of the current period is obtained by the following method: obtain l time periods of the current period, construct an autoencoder, use the l time periods of the current period as sample sets of the autoencoder, give values ​​to each time period as the advance estimated temperature value, cut the sample set into a learning set and a test set according to a ratio of 1:4, send the learning set and the test set to the autoencoder for learning, and obtain the cable head detection advance estimation mode of the current period. The cable head detection advance estimation mode is used to estimate the temperature value of the distribution network cable head in the relevant period in advance.

[0017] Furthermore, in step 2, the method for obtaining detection distinction parameters based on the sampled temperature values ​​and the advance estimated temperature values ​​includes: performing pre-processing on the sampled temperature values ​​and the advance estimated temperature values, combining the pre-processed sampled temperature values ​​and the advance estimated temperature values ​​into a detection reference cluster, obtaining a cable head detection distinction pattern, using the detection reference cluster as the input value of the cable head detection distinction pattern, and deriving the cable head detection distinction pattern to obtain the detection distinction parameters.

[0018] Furthermore, in step 2, the cable head detection and differentiation mode is obtained by the following method: obtain j detection control clusters, construct an autoencoder, use the j detection control clusters as sample sets of the autoencoder, assign detection distinction parameters to each detection control cluster, cut the sample set into a learning set and a test set at a ratio of 3:4, send the learning set and the test set into the autoencoder, and obtain the cable head detection and differentiation mode.

[0019] Furthermore, step 3 also includes: when the performance analysis parameter is not lower than the performance analysis definition amount, the performance control value is processed using the performance control mode; after the processing is completed, the detection distinction parameter is obtained according to the processed performance control value and the estimated temperature value; when the detection distinction parameter is not lower than the detection distinction critical amount and the performance control value has not completed the processing of all performance control modes, the performance analysis of the next type of performance control mode is performed on the processed performance control value according to the arrangement order of the performance control modes; when the detection distinction parameter is not lower than the detection distinction critical amount and the performance control value has completed the processing of all performance control modes, the performance control value is defined as a performance credible value; when the detection distinction parameter is lower than the detection distinction critical amount, the processed performance control value is defined as a performance credible value.

[0020] Further, in step 3, the performance analysis parameters of the performance analysis items are obtained by the following method: obtaining the mode analysis mode of the performance control mode, taking the performance control value as the input value of the mode analysis mode, and deriving the mode analysis mode to obtain the performance analysis parameters.

[0021] Furthermore, in step 3, the performance control sequence code of the performance control mode can also be obtained by the following method: obtain all the performance analysis items formed before the current time point of the same performance control mode, arrange all the performance analysis items in sequence according to the order of the performance analysis time points, and use the modulus of the amount obtained by subtracting the performance analysis parameters of a pair of adjacent performance analysis items after arrangement as the performance analysis fluctuation amount, define the performance analysis fluctuation critical amount, and when the performance analysis fluctuation amount is not lower than the performance analysis fluctuation critical amount, increment the performance analysis fluctuation number variable whose initial value is 0 by one. When the performance analysis fluctuation is lower than the performance analysis fluctuation critical value, no processing is performed, and the performance analysis fluctuation number variable is defined as Dkct. The performance analysis parameters of a pair of adjacent performance analysis items after arrangement are added together to obtain the performance analysis continuity, and the performance analysis continuity critical value is defined. When the performance analysis continuity is not lower than the performance analysis continuity critical value, the performance analysis continuity number variable whose initial value is 0 is incremented by one. When the performance analysis continuity is lower than the performance analysis continuity critical value, no processing is performed, and the performance analysis continuity number variable is defined as Qzul. Use the equation Obtain the performance control order code HUn of the performance control mode, where i1 is the performance analysis fluctuation number variable factor, i2 is the performance analysis continuity number variable factor, the value of i1 is ninety-five percent, and the value of h2 is eighty-eight percent.

[0022] Furthermore, in step 4, the distribution network cable head detection measurement quantity is obtained by the following method: sampling all performance analysis items formed in the U period, thereby obtaining the mode interference quantity of each performance control mode, defining the mode interference critical quantity, and when the mode interference quantity is not less than the mode interference critical quantity, defining the performance control mode as a significant control mode, and when the mode interference quantity is less than the mode interference critical quantity, no processing is performed, defining the total number of significant control modes as Iuf, dividing each pair of all significant control modes into a group, and performing addition processing on the mode interference quantities of a pair of significant control modes in the same group Set, obtain the mode interference addition, define the mode interference addition critical amount, when the mode interference addition is not less than the mode interference addition critical amount, increase the interference cumulative frequency variable with an initial value of 0 by 1, when the mode interference addition is less than the mode interference addition critical amount, do not perform any processing, define the interference cumulative frequency variable as MHz, and use the equation YLn=Iuf×v1+MHz×v2 to obtain the distribution network cable head detection measurement value YLn, where v1 is the significant control mode number factor, v2 is the interference cumulative frequency variable factor, the value of v1 is 2.49, and the value of u2 is 2.29.

[0023] A detection device for distribution network cable joints, comprising:

[0024] The temperature sensor is connected to the temperature measuring terminal. The temperature sensor is used to sample the temperature value of the distribution network cable head and transmit it to the temperature measuring terminal. The temperature measuring terminal is used to process the collected temperature value of the distribution network cable head and then display it, so as to achieve detection of the distribution network cable head;

[0025] The temperature measurement terminal includes a temperature value collecting unit, a temperature value performance advance estimation unit, a temperature value performance control unit, and a temperature value detection improvement unit.

[0026] Furthermore, the temperature value collecting unit is used to form a distribution network cable head detection time slot. When the cable head detection time slot arrives, the temperature sensor is controlled to sample the temperature value of the distribution network cable head, and the temperature value of the distribution network cable head obtained by the temperature sensor is defined as the sampling temperature value.

[0027] Furthermore, the temperature value performance advance estimation unit is used to obtain the advance estimated temperature value of the current time period, obtain the detection distinction parameter based on the sampled temperature value and the advance estimated temperature value, define the detection distinction critical value, and when the detection distinction parameter is higher than the detection distinction critical value, define the sampled temperature value as the performance control value; when the detection distinction parameter is not higher than the detection distinction critical value, define the sampled temperature value as the performance credible value.

[0028] Furthermore, the temperature value performance control unit is used to obtain the performance control sequence codes of various performance control modes after the sampled temperature value is defined as the performance control value, arrange all the performance control modes in sequence according to the order of the performance control sequence codes, and perform performance analysis on the performance control values ​​in sequence according to the arrangement order of the performance control modes. After performing performance analysis on each type of performance control mode on the performance control values, a performance analysis entry for the performance control mode is formed. The performance analysis entry contains performance analysis parameters and performance analysis time points. When forming a performance analysis entry, the performance analysis parameters of the performance analysis entry are obtained, and the performance analysis boundary value is defined.

[0029] Furthermore, the temperature value performance control unit is also used to, when the performance analysis parameter is not lower than the performance analysis definition value, use the performance control mode to perform processing on the performance control value; after the processing is completed, the detection distinction parameter is obtained according to the processed performance control value and the estimated temperature value; when the detection distinction parameter is not lower than the detection distinction critical value and the performance control value has not completed the processing of all performance control modes, the performance analysis of the latter type of performance control mode is performed on the processed performance control value according to the arrangement order of the performance control modes; when the detection distinction parameter is not lower than the detection distinction critical value and the performance control value has completed the processing of all performance control modes, the performance control value is defined as a performance credible value; when the detection distinction parameter is lower than the detection distinction critical value, the processed performance control value is defined as a performance credible value.

[0030] Furthermore, the temperature value detection improvement unit is used to obtain the distribution network cable head detection measurement quantity in each time period of size U, define the cable head detection measurement critical quantity, and when the cable head detection measurement quantity is not lower than the cable head detection measurement critical quantity, improve the detection performance of the temperature value of the distribution network cable head of the temperature measuring sensor; when the cable head detection measurement quantity is lower than the cable head detection measurement critical quantity, no action is performed.

[0031] Further, in step 4, the interference amount of the performance control mode is obtained by the following method: obtain all the performance analysis items of the same performance control mode, perform addition processing on the performance analysis parameters of all the performance analysis items and take the average of the amount obtained by the addition processing, obtain the performance analysis average parameter Gda, define the performance analysis boundary quantity, when the performance analysis parameter of the performance analysis item is not lower than the performance analysis boundary quantity, define the performance analysis item as a significant variation item, when the performance analysis parameter of the performance analysis item is lower than the performance analysis boundary quantity, do not perform processing, define the total number of significant variation items as Fuq, arrange all the significant variation items in sequence according to the order of the performance analysis time points, perform subtraction operation on the performance analysis time points of a pair of significant variation items adjacent to each other after arrangement, obtain the significant variation time interval, perform addition processing on all the significant variation time intervals and obtain the average of the amount obtained by the addition, obtain the significant variation time interval mean Nih, and use the equation Obtain the interference value Tek of the performance control mode, where s1 is the mean parameter factor of performance analysis, s2 is the factor for the number of significant variation items, and s3 is the mean factor for the time interval of significant variation. The value of s1 is thirty-one percent, the value of s1 is twenty-eight percent, and the value of s3 is forty-seven percent.

[0032] The beneficial effects of the present invention are that, compared with the prior art, the technical effects of the present invention include:

[0033] A temperature value collecting unit, a temperature value performance pre-estimation unit and a temperature value performance control unit are defined. The temperature value of the distribution network cable head is pre-estimated through the cable head detection pre-estimation mode, and the difference between the sampled temperature value and the pre-estimated temperature value is actively analyzed through the cable head detection differentiation mode. When there is a difference, the sampled temperature value is analyzed in sequence according to the order of the performance control modes, and the relevant performance control modes are applied after the performance risk is analyzed, so as to ensure that the sampled temperature value is analyzed and controlled according to the performance control mode with high performance risk first, and after all performance control modes are analyzed and controlled, it can be timely determined whether the pre-estimated temperature value has pre-estimation error, which is conducive to the subsequent pre-estimation improvement of the temperature value of the distribution network cable head; a temperature value detection improvement unit is defined, which can analyze the distribution network cable head detection measurement performance as a whole according to the performance analysis items, and timely determine whether the detection performance of the temperature value of the distribution network cable head of the temperature measuring sensor needs to be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a partial flow chart of the detection method for distribution network cable joints described in the present invention;

[0035] Figure 2 It is a partial structural schematic diagram of the detection device for distribution network cable joints described in the present invention. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely express the technical solution of the present invention. The embodiments expressed in this application are only some embodiments of the present invention, not all embodiments. According to the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without making creative work are all within the protection scope of the present invention.

[0037] like Figure 1 As shown, a detection method for a distribution network cable joint according to the present invention comprises:

[0038] The temperature sensor samples the temperature value of the distribution network cable head and transmits it to the temperature measurement terminal. The temperature measurement terminal processes the collected temperature value of the distribution network cable head and displays it, thereby achieving detection of the distribution network cable head;

[0039] The method for the temperature measuring terminal to process the temperature value of the distribution network cable head received includes:

[0040] Step 1: Form a distribution network cable head detection time slot. When the cable head detection time slot is reached, control the temperature sensor to sample the temperature value of the distribution network cable head, and define the temperature value of the distribution network cable head obtained by the temperature sensor as the sampling temperature value;

[0041] Step 2: Obtain the estimated temperature value in advance for the current period, obtain the detection distinction parameter based on the sampled temperature value and the estimated temperature value in advance, define the detection distinction threshold, and define the sampled temperature value as the performance control value when the detection distinction parameter is higher than the detection distinction threshold. When the detection distinction parameter is not higher than the detection distinction threshold, define the sampled temperature value as the performance credible value.

[0042] Step 3: After the sampled temperature value is defined as the performance control value, the performance control sequence code of each performance control mode is obtained, and all the performance control modes are arranged in sequence according to the order of the performance control sequence code, and the performance control values ​​are analyzed in sequence according to the arrangement order of the performance control modes. After each pair of performance control values ​​is subjected to the performance analysis of a type of performance control mode, a performance analysis entry of the performance control mode is formed. The performance analysis entry includes a performance analysis parameter and a performance analysis time point. When forming a performance analysis entry, the performance analysis parameter of the performance analysis entry is obtained, and a performance analysis limit value is defined;

[0043] Step 4: In each time period of size U, obtain the distribution network cable head detection and measurement quantity, define the cable head detection and measurement critical quantity, and when the cable head detection and measurement quantity is not lower than the cable head detection and measurement critical quantity, improve the detection performance of the temperature value of the distribution network cable head of the temperature sensor; when the cable head detection and measurement quantity is lower than the cable head detection and measurement critical quantity, no action is taken.

[0044] In a preferred but non-limiting embodiment of the present invention, in step 2, the method for obtaining the advance estimated temperature value of the current time period includes: obtaining the cable head detection advance estimation mode of the current time period, taking the current time period as the input value of the cable head detection advance estimation mode, and the cable head detection advance estimation mode sends out the advance estimated temperature value of the current time period.

[0045] In a preferred but non-limiting embodiment of the present invention, in step 2, the cable head detection advance estimation mode of the current period is obtained by the following method: obtaining l time periods of the current period, constructing an autoencoder, treating the l time periods of the current period as sample sets of the autoencoder, giving values ​​to each time period as advance estimated temperature values, cutting the sample set into a learning set and a test set according to a ratio of 1:4, sending the learning set and the test set to the autoencoder for learning, and obtaining the cable head detection advance estimation mode of the current period. The cable head detection advance estimation mode is used to estimate the temperature value of the distribution network cable head in the relevant time period in advance.

[0046] In a preferred but non-limiting embodiment of the present invention, in step 2, the method for obtaining detection and distinguishing parameters based on the sampled temperature values ​​and the advance estimated temperature values ​​includes: performing pre-processing on the sampled temperature values ​​and the advance estimated temperature values ​​(the pre-processing method may include a mean filtering method), combining the pre-processed sampled temperature values ​​and the advance estimated temperature values ​​into a detection reference cluster, obtaining a cable head detection and distinguishing pattern, using the detection reference cluster as the input value of the cable head detection and distinguishing pattern, and deriving the cable head detection and distinguishing pattern to obtain the detection and distinguishing parameters.

[0047] In a preferred but non-limiting embodiment of the present invention, in step 2, the cable head detection and differentiation mode is obtained by the following method: j detection control clusters are obtained, the sampled temperature values ​​and the pre-estimated temperature values ​​in each detection control cluster can be actual values, or numerical values ​​defined by simulation, an autoencoder is constructed, the j detection control clusters are used as sample sets of the autoencoder, a detection and differentiation parameter is assigned to each detection control cluster, the sample set is cut into a learning set and a test set according to a ratio of 3:4, the learning set and the test set are sent to the autoencoder, and the cable head detection and differentiation mode is obtained. The values ​​of the detection and differentiation parameters are all higher than 0, and the higher the value of the detection and differentiation parameter, the higher the difference between the sampled temperature value and the pre-estimated temperature value.

[0048] In a preferred but non-limiting embodiment of the present invention, step 3 also includes: when the performance analysis parameter is not lower than the performance analysis definition amount, the performance control value is processed using the performance control mode; after the processing is completed, the detection distinction parameter is obtained according to the processed performance control value and the estimated temperature value in advance; when the detection distinction parameter is not lower than the detection distinction critical amount and the performance control value has not completed the processing of all performance control modes, the performance analysis of the latter type of performance control mode is performed on the processed performance control value according to the arrangement order of the performance control modes; when the detection distinction parameter is not lower than the detection distinction critical amount and the performance control value has completed the processing of all performance control modes, the performance control value is defined as a performance credible value; when the detection distinction parameter is lower than the detection distinction critical amount, the processed performance control value is defined as a performance credible value.

[0049] In a preferred but non-limiting embodiment of the present invention, in step 3, the performance analysis parameters of the performance analysis items are obtained by the following method: obtaining the mode analysis mode of the performance control mode, taking the performance control value as the input value of the mode analysis mode, and deriving the mode analysis mode to obtain the performance analysis parameters.

[0050] Different performance control modes use different method analysis modes. To be suitable for the analysis of different performance control modes, this application constructs different method analysis modes in the same way. It is only necessary to perform relevant replacements on the sample sets of different method analysis modes. Therefore, this application only gives the construction method of the method analysis mode of the temperature value completeness control mode, and the construction methods of other method analysis modes can be obtained by analogy; the construction method of the method analysis mode of the temperature value completeness control mode is as follows: obtain M performance control values, construct an autoencoder, treat the M performance control values ​​as the sample set of the autoencoder, give each performance control value a performance analysis parameter, and divide the sample set into a learning set and a test set at a one-to-one ratio. The learning set and the test set are sent to the autoencoder for learning. After the learning is completed, the method analysis mode of the temperature completeness control mode is obtained. The numerical range of the performance analysis parameters of different method analysis modes is the same, which is (0-1). The higher the value of the performance analysis parameter, the more abnormal the temperature completeness of the performance control value (the same applies to other performance control modes. The higher the performance analysis parameter of the temperature coordination control mode, the more abnormal the temperature coordination of the performance control value). The lower the value of the performance analysis parameter, the more standardized the temperature completeness of the performance control value (the same applies to other performance control modes. The lower the performance analysis parameter of the time synchronization control mode, the more standardized the time synchronization of the performance control value).

[0051] In a preferred but non-restrictive embodiment of the present invention, in step 3, the performance control order code of the performance control mode can also be obtained by the following method: obtain all performance analysis items formed before the current time point of the same performance control mode, arrange all performance analysis items in sequence according to the order of the performance analysis time point (that is, the time point when the analysis is started), and use the modulus of the amount obtained by subtracting the performance analysis parameters of a pair of adjacent performance analysis items after arrangement as the performance analysis fluctuation amount, define the performance analysis fluctuation critical amount, which is a pre-defined parameter that can be configured according to specific requirements. When the performance analysis fluctuation amount is not lower than the performance analysis fluctuation critical amount, the performance analysis fluctuation critical amount is set to 0. The performance analysis fluctuation number variable is incremented by one. When the performance analysis fluctuation amount is lower than the performance analysis fluctuation critical amount, no processing is performed. The performance analysis fluctuation number variable is defined as Dkct. The performance analysis parameters of a pair of adjacent performance analysis items after arrangement are added together to obtain the performance analysis continuity amount. The performance analysis continuity critical amount is defined. The performance analysis continuity critical amount is a pre-defined parameter that can be configured according to specific requirements. When the performance analysis continuity amount is not lower than the performance analysis continuity critical amount, the performance analysis continuity number variable whose initial value is 0 is incremented by one. When the performance analysis continuity amount is lower than the performance analysis continuity critical amount, no processing is performed. The performance analysis continuity number variable is defined as Qzul. Use the equation Obtain the performance control order code HUn of the performance control mode, where i1 is the performance analysis fluctuation number variable factor, i2 is the performance analysis continuity number variable factor, the value of i1 is ninety-five percent, and the value of h2 is eighty-eight percent.

[0052] In a preferred but non-limiting embodiment of the present invention, in step 4, the distribution network cable head detection measurement quantity is obtained by the following method: sampling all performance analysis items formed in the U time period to obtain the mode interference quantity of each performance control mode, defining the mode interference critical quantity, the mode interference critical quantity is a pre-defined parameter, and can be configured according to specific requirements. When the mode interference quantity is not less than the mode interference critical quantity, the performance control mode is defined as a significant control mode. When the mode interference quantity is less than the mode interference critical quantity, no processing is performed. The total number of significant control modes is defined as Iuf, and each pair of all significant control modes is divided into a group, and the same group The mode interference amounts of a pair of significant control modes are added to obtain the mode interference addition amount, and the mode interference addition critical amount is defined. When the mode interference addition amount is not less than the mode interference addition critical amount, the interference cumulative frequency variable with an initial value of 0 is incremented by one. When the mode interference addition amount is less than the mode interference addition critical amount, no processing is performed. The interference cumulative frequency variable is defined as MHz. The distribution network cable head detection measurement amount YLn is obtained using the equation YLn=Iuf×v1+MHz×v2, where v1 is the significant control mode number factor, v2 is the interference cumulative frequency variable factor, the value of v1 is 2.49, and the value of u2 is 2.29.

[0053] like Figure 2 As shown, a detection device for a distribution network cable joint according to the present invention comprises:

[0054] The temperature sensor is connected to the temperature measuring terminal. The temperature sensor is used to sample the temperature value of the distribution network cable head and transmit it to the temperature measuring terminal. The temperature measuring terminal is used to process the collected temperature value of the distribution network cable head and then display it, so as to achieve detection of the distribution network cable head;

[0055] The temperature measurement terminal includes a temperature value collecting unit, a temperature value performance advance estimation unit, a temperature value performance control unit, and a temperature value detection improvement unit.

[0056] In a preferred but non-limiting embodiment of the present invention, the temperature value collecting unit is used to form a distribution network cable head detection time slot (the cable head detection time slot defines a number of time periods with the same time interval, and the size of the time interval can be configured according to requirements). Once the cable head detection time slot period arrives, the temperature sensor is controlled to sample the temperature value of the distribution network cable head (the sampling interval of the temperature value of the distribution network cable head is only between the current time period and the previous time period), and the temperature value of the distribution network cable head obtained by sampling with the temperature sensor is defined as the sampled temperature value.

[0057] In a preferred but non-limiting embodiment of the present invention, the temperature value performance advance estimation unit is used to obtain the advance estimated temperature value of the current time period, obtain the detection distinction parameter based on the sampled temperature value and the advance estimated temperature value, define the detection distinction critical value, and the height of the detection distinction critical value can be configured according to specific requirements. When the detection distinction parameter is higher than the detection distinction critical value, the sampled temperature value is defined as the performance control value. When the detection distinction parameter is not higher than the detection distinction critical value, the sampled temperature value is defined as the performance credible value (the performance credible value can be used as a benchmark value for subsequent cable head detection advance estimation mode learning).

[0058] In a preferred but non-limiting embodiment of the present invention, the temperature value performance control unit is used to obtain the performance control sequence code of various performance control modes after the sampled temperature value is defined as the performance control value (there are many performance control modes of the temperature value of the distribution network cable head, and the sequence code is to give the performance control mode a sequence code from low to high according to a pre-defined sequence, including the SM3 algorithm as the temperature value completeness control mode, the Paxos algorithm as the temperature value coordination control mode, and the NTP algorithm as the time point synchronization control mode in sequence. Here, the temperature value completeness control mode is used to process the consistency and completeness of the temperature value of the distribution network cable head, and the temperature value coordination control mode is used to control the distribution network cable head. The compliance of the temperature value of the distribution network cable head is processed, and the time point synchronization control mode is used to coordinate the temperature value of the distribution network cable head). All performance control modes are arranged in sequence according to the order of the performance control sequence code, and the performance control values ​​are analyzed in sequence according to the arrangement order of the performance control modes. After the performance analysis of a type of performance control mode is performed on each pair of performance control values, a performance analysis entry of the performance control mode is formed. The performance analysis entry contains performance analysis parameters and performance analysis time points. When a performance analysis entry is formed, the performance analysis parameters of the performance analysis entry are obtained, and the performance analysis definition quantity is defined. The performance analysis definition quantity is a pre-defined quantity that can be configured according to specific requirements.

[0059] In a preferred but non-limiting embodiment of the present invention, the temperature value performance control unit is also used to, when the performance analysis parameter is not lower than the performance analysis definition, use the performance control mode to perform processing on the performance control value; after the processing is completed, the detection distinction parameter is obtained according to the processed performance control value and the estimated temperature value in advance (using the cable head detection distinction mode); when the detection distinction parameter is not lower than the detection distinction critical value and the performance control value has not completed the processing of all performance control modes, the performance analysis of the latter type of performance control mode is performed on the processed performance control value according to the arrangement order of the performance control modes; when the detection distinction parameter is not lower than the detection distinction critical value and the performance control value has completed the processing of all performance control modes, the performance control value is defined as a performance credible value (meaning that the estimated temperature value in advance has an estimated error); when the detection distinction parameter is lower than the detection distinction critical value, the processed performance control value is defined as a performance credible value.

[0060] When the performance analysis parameter is lower than the performance analysis definition, the performance analysis of the next type of performance control mode is performed on the performance control value according to the arrangement order of the performance control modes (if the performance control value has completed the processing of all performance control modes, there is no need to continue to perform performance analysis of the performance control mode, and the performance control value is defined as a performance credible value).

[0061] A temperature value collecting unit, a temperature value performance early estimation unit and a temperature value performance control unit are defined. The temperature value of the distribution network cable head is estimated in advance through the cable head detection early estimation mode, and the difference between the sampled temperature value and the estimated temperature value is automatically analyzed through the cable head detection differentiation mode. When there is a difference, the sampled temperature value is analyzed in sequence according to the order of the performance control modes, and the relevant performance control modes are applied after the performance risk is analyzed to ensure that the sampled temperature value is analyzed and controlled according to the performance control mode with high performance risk first, and after all performance control modes are analyzed and controlled, it can be timely determined whether the estimated temperature value has an estimation error, which is conducive to the improvement of the estimation of the temperature value of the distribution network cable head in the future.

[0062] In a preferred but non-limiting embodiment of the present invention, the temperature value detection improvement unit is used to obtain the distribution network cable head detection measurement quantity in each time period of size U, define the cable head detection measurement critical quantity, the cable head detection measurement critical quantity is a pre-defined parameter, and can be configured according to specific requirements. When the cable head detection measurement quantity is not lower than the cable head detection measurement critical quantity, the detection performance of the temperature value of the distribution network cable head of the temperature sensor is improved (the improvement method includes inspection and replacement of the temperature sensor). When the cable head detection measurement quantity is lower than the cable head detection measurement critical quantity, no disposal is performed.

[0063] In a preferred but non-restrictive embodiment of the present invention, in step 4, the mode interference amount of the performance control mode is obtained by the following method: obtain all the performance analysis items of the same performance control mode, perform addition processing on the performance analysis parameters of all the performance analysis items and take the average of the amounts obtained by the addition processing, obtain the performance analysis average parameter Gda, define the performance analysis boundary amount (which is different from the performance analysis definition amount), the performance analysis boundary amount is a pre-defined parameter, which can be configured according to specific requirements, and when the performance analysis parameter of the performance analysis item is not lower than the performance analysis boundary amount, the performance analysis item is defined as For significant variation items, when the performance analysis parameter of the performance analysis item is lower than the performance analysis boundary, no processing is performed. The total number of significant variation items is defined as Fuq. All significant variation items are arranged in sequence according to the order of the performance analysis time points. The performance analysis time points of a pair of adjacent significant variation items after arrangement are reduced (the adjacent performance analysis time point in the back is subtracted from the adjacent performance analysis time point in the front), and the significant variation time interval is obtained. All significant variation time intervals are added and the average of the added quantities is obtained to obtain the mean of the significant variation time intervals Nih. The equation is used Obtain the interference value Tek of the performance control mode, where s1 is the mean parameter factor of performance analysis, s2 is the factor for the number of significant variation items, and s3 is the mean factor for the time interval of significant variation. The value of s1 is thirty-one percent, the value of s1 is twenty-eight percent, and the value of s3 is forty-seven percent.

[0064] The temperature detection improvement unit is defined, which can analyze the distribution network cable head detection and measurement performance as a whole according to the performance analysis items, and timely determine whether it is necessary to improve the temperature detection performance of the distribution network cable head of the temperature sensor.

[0065] The beneficial effects of the present invention are that, compared with the prior art, the technical effects of the present invention include:

[0066] A temperature value collecting unit, a temperature value performance pre-estimation unit and a temperature value performance control unit are defined. The temperature value of the distribution network cable head is pre-estimated through the cable head detection pre-estimation mode, and the difference between the sampled temperature value and the pre-estimated temperature value is actively analyzed through the cable head detection differentiation mode. When there is a difference, the sampled temperature value is analyzed in sequence according to the order of the performance control modes, and the relevant performance control modes are applied after the performance risk is analyzed, so as to ensure that the sampled temperature value is analyzed and controlled according to the performance control mode with high performance risk first, and after all performance control modes are analyzed and controlled, it can be timely determined whether the pre-estimated temperature value has pre-estimation error, which is conducive to the subsequent pre-estimation improvement of the temperature value of the distribution network cable head; a temperature value detection improvement unit is defined, which can analyze the distribution network cable head detection measurement performance as a whole according to the performance analysis items, and timely determine whether the detection performance of the temperature value of the distribution network cable head of the temperature measuring sensor needs to be improved.

[0067] The present disclosure can be a system, method and / or computer program product. The computer program product can include a computer-readable backup medium carrying computer-readable program instructions for causing a processor to implement various aspects of the disclosure.

[0068] The computer readable backup medium can be a tangible network capable of retaining and backing up the instructions used by the instruction execution network. The computer readable backup medium can be, but is not limited to, an electrical backup network, a magnetic backup network, an optical backup network, an electromagnetic backup network, a semiconductor backup network, or any suitable combination of the above. Further examples of computer readable backup media (non-exhaustive list) include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disk read-only memory (HD-ROM), digital versatile disk (DXD), memory stick, floppy disk, mechanically encoded network, such as punch cards or protrusions in grooves with instructions backed up thereon, and any suitable combination of the above. The computer readable backup medium used herein is not to be construed as a transient signal itself, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a power line cable), or an electrical signal transmitted through wires.

[0069] The computer readable program instructions expressed herein can be downloaded from the computer readable backup medium to each inference / processing power grid line, or downloaded to an external computer or external backup power grid line through a wireless network, such as the Internet, a local area network, a wide area network and / or a wireless network. The wireless network can include copper transmission cables, power transmission lines, wireless transmission, routers, firewalls, switches, gateway computers and / or edge service devices. The wireless network adapter card or wireless network interface in each inference / processing power grid line receives the computer readable program instructions from the wireless network and forwards the computer readable program instructions for storage in the computer readable backup medium in each inference / processing power grid line.

[0070] The computer program instructions for performing the operations of the present disclosure can be assembler instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, conditional setting values, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Sdaletal A, H++, etc., and conventional procedural programming languages ​​such as "H" language or similar programming languages. The computer-readable program instructions can be executed completely on the client computer, partially on the client computer, as a separate software package, partially on the client computer and partially on the remote computer, or completely on the remote computer or server. In the case of a remote computer, the remote computer can be connected to the client computer through any other wireless network, including a local area network (LAb) or a wide area network (WAb), or can be connected to an external computer (just like using an Internet service provider to connect through the Internet). In some embodiments, the electronic circuit is customized by using the status values ​​of computer-readable program instructions, such as a programmable logic circuit, a field programmable gate array (FPGA) or a programmable logic array (PLA), and the electronic circuit can execute computer-readable program instructions to achieve various aspects of the overhead disclosure.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not deviate from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A detection method for distribution network cable joints, characterized in that: include: The temperature sensor samples the temperature value of the distribution network cable head and transmits it to the temperature measurement terminal. The temperature measurement terminal processes the collected temperature value of the distribution network cable head and displays it, thereby achieving detection of the distribution network cable head; The method for the temperature measuring terminal to process the temperature value of the distribution network cable head received includes: Step 1: Form a distribution network cable head detection time slot. When the cable head detection time slot is reached, control the temperature sensor to sample the temperature value of the distribution network cable head, and define the temperature value of the distribution network cable head obtained by the temperature sensor as the sampling temperature value; Step 2: Obtain the estimated temperature value in advance for the current period, obtain the detection distinction parameter based on the sampled temperature value and the estimated temperature value in advance, define the detection distinction threshold, and define the sampled temperature value as the performance control value when the detection distinction parameter is higher than the detection distinction threshold. When the detection distinction parameter is not higher than the detection distinction threshold, define the sampled temperature value as the performance credible value. Step 3: After the sampled temperature value is defined as the performance control value, the performance control sequence code of each performance control mode is obtained, and all the performance control modes are arranged in sequence according to the order of the performance control sequence code, and the performance control values ​​are analyzed in sequence according to the arrangement order of the performance control modes. After each pair of performance control values ​​is subjected to the performance analysis of a type of performance control mode, a performance analysis entry of the performance control mode is formed. The performance analysis entry includes a performance analysis parameter and a performance analysis time point. When forming a performance analysis entry, the performance analysis parameter of the performance analysis entry is obtained, and a performance analysis limit value is defined; Step 4: In each time period of size U, obtain the distribution network cable head detection and measurement quantity, define the cable head detection and measurement critical quantity, and when the cable head detection and measurement quantity is not lower than the cable head detection and measurement critical quantity, improve the detection performance of the temperature value of the distribution network cable head of the temperature sensor; when the cable head detection and measurement quantity is lower than the cable head detection and measurement critical quantity, no action is taken.

2. The detection method for distribution network cable joints according to claim 1, characterized in that: In step 2, the method for obtaining the advance estimated temperature value of the current time period includes: obtaining the cable head detection advance estimation mode of the current time period, taking the current time period as the input value of the cable head detection advance estimation mode, and the cable head detection advance estimation mode outputting the obtained advance estimated temperature value of the current time period; In step 2, the cable head detection advance estimation mode of the current period is obtained by the following method: obtain l time periods of the current period, construct an autoencoder, use the l time periods of the current period as sample sets of the autoencoder, give values ​​to each time period as the advance estimated temperature value, cut the sample set into a learning set and a test set according to a ratio of 1:4, send the learning set and the test set to the autoencoder for learning, and obtain the cable head detection advance estimation mode of the current period. The cable head detection advance estimation mode is used to estimate the temperature value of the distribution network cable head in the relevant period in advance.

3. The detection method for distribution network cable joints according to claim 2 is characterized in that: In step 2, the method for obtaining the detection distinguishing parameter according to the sampled temperature value and the pre-estimated temperature value includes: performing pre-processing on the sampled temperature value and the pre-estimated temperature value, combining the sampled temperature value and the pre-estimated temperature value after the pre-processing into a detection reference cluster, obtaining the cable head detection distinguishing mode, using the detection reference cluster as the input value of the cable head detection distinguishing mode, and deriving the cable head detection distinguishing mode to obtain the detection distinguishing parameter; In step 2, the cable head detection and discrimination mode is obtained by the following method: obtain j detection control clusters, construct an autoencoder, use the j detection control clusters as sample sets of the autoencoder, assign detection discrimination parameters to each detection control cluster, cut the sample set into a learning set and a test set at a ratio of 3:4, send the learning set and the test set to the autoencoder, and obtain the cable head detection and discrimination mode.

4. The detection method for distribution network cable joints according to claim 3 is characterized in that: Step 3 also includes: when the performance analysis parameter is not less than the performance analysis definition, the performance control value is processed using the performance control mode, after the processing is completed, the detection distinction parameter is obtained according to the processed performance control value and the estimated temperature value, when the detection distinction parameter is not less than the detection distinction critical value and the performance control value has not completed the processing of all performance control modes, according to the arrangement order of the performance control modes, the performance analysis of the next type of performance control mode is performed on the processed performance control value, when the detection distinction parameter is not less than the detection distinction critical value and the performance control value has completed the processing of all performance control modes, the performance control value is defined as a performance credible value, and when the detection distinction parameter is less than the detection distinction critical value, the processed performance control value is defined as a performance credible value.

5. The detection method for distribution network cable joints according to claim 4 is characterized in that: In step 3, the performance analysis parameters of the performance analysis items are obtained by the following method: obtaining the mode analysis mode of the performance control mode, taking the performance control value as the input value of the mode analysis mode, and deriving the mode analysis mode to obtain the performance analysis parameters; In step 3, the performance control sequence code of the performance control mode can also be obtained by the following method: obtain all performance analysis items formed before the current time point of the same performance control mode, arrange all performance analysis items in sequence according to the order of the performance analysis time points, and use the modulus of the amount obtained by subtracting the performance analysis parameters of a pair of adjacent performance analysis items after arrangement as the performance analysis fluctuation amount, define the performance analysis fluctuation critical amount, and when the performance analysis fluctuation amount is not lower than the performance analysis fluctuation critical amount, increase the performance analysis fluctuation number variable whose initial value is 0 by 1, and When the performance analysis fluctuation is lower than the performance analysis fluctuation critical value, no processing is performed, and the performance analysis fluctuation number variable is defined as Dkct. The performance analysis parameters of a pair of adjacent performance analysis items after arrangement are added together to obtain the performance analysis continuity, and the performance analysis continuity critical value is defined. When the performance analysis continuity is not lower than the performance analysis continuity critical value, the performance analysis continuity number variable whose initial value is 0 is incremented by 1. When the performance analysis continuity is lower than the performance analysis continuity critical value, no processing is performed, and the performance analysis continuity number variable is defined as Qzul. The equation is used. Obtain the performance control order code HUn of the performance control mode, where i1 is the performance analysis fluctuation number variable factor, i2 is the performance analysis continuity number variable factor, the value of i1 is ninety-five percent, and the value of h2 is eighty-eight percent.

6. The detection method for distribution network cable joints according to claim 5, characterized in that: In step 4, the distribution network cable head detection measurement quantity is obtained by the following method: sampling all performance analysis items formed in the U period to obtain the mode interference quantity of each performance control mode, defining the mode interference threshold, when the mode interference quantity is not less than the mode interference threshold, defining the performance control mode as a significant control mode, when the mode interference quantity is less than the mode interference threshold, no processing is performed, defining the total number of significant control modes as Iuf, dividing each pair of all significant control modes into a group, and performing addition processing on the mode interference quantities of a pair of significant control modes in the same group, Obtain the mode interference addition, define the mode interference addition critical value, when the mode interference addition is not less than the mode interference addition critical value, increase the interference cumulative frequency variable whose initial value is 0 by 1, when the mode interference addition is less than the mode interference addition critical value, do not perform any processing, define the interference cumulative frequency variable as MHz, and use the equation YLn=Iuf×v1+MHz×v2 to obtain the distribution network cable head detection measurement value YLn, where v1 is the significant control mode number factor, v2 is the interference cumulative frequency variable factor, the value of v1 is 2.49, and the value of u2 is 2.

29.

7. A detection device for distribution network cable joints, characterized in that: include: The temperature sensor is connected to the temperature measuring terminal. The temperature sensor is used to sample the temperature value of the distribution network cable head and transmit it to the temperature measuring terminal. The temperature measuring terminal is used to process the collected temperature value of the distribution network cable head and then display it, so as to achieve detection of the distribution network cable head; The temperature measurement terminal includes a temperature value collecting unit, a temperature value performance advance estimation unit, a temperature value performance control unit, and a temperature value detection improvement unit.

8. The detection device for distribution network cable joints according to claim 7, characterized in that: The temperature value collecting unit is used to form a distribution network cable head detection time slot. When the cable head detection time slot is reached, the temperature sensor is controlled to sample the temperature value of the distribution network cable head. The temperature value of the distribution network cable head obtained by the temperature sensor is defined as the sampling temperature value.

9. The detection device for distribution network cable joints according to claim 8, characterized in that: The temperature value performance advance estimation unit is used to obtain the advance estimated temperature value of the current time period, obtain the detection distinction parameter based on the sampled temperature value and the advance estimated temperature value, define the detection distinction critical value, and when the detection distinction parameter is higher than the detection distinction critical value, define the sampled temperature value as the performance control value; when the detection distinction parameter is not higher than the detection distinction critical value, define the sampled temperature value as the performance credible value.

10. The detection device for distribution network cable joints according to claim 9, characterized in that: The temperature value performance control unit is used to obtain the performance control sequence code of each performance control mode after the sampled temperature value is defined as the performance control value, arrange all the performance control modes in sequence according to the order of the performance control sequence code, and perform performance analysis on the performance control values ​​in sequence according to the arrangement order of the performance control modes. After the performance analysis of a type of performance control mode is performed on each pair of performance control values, a performance analysis entry of the performance control mode is formed. The performance analysis entry includes a performance analysis parameter and a performance analysis time point. When forming a performance analysis entry, the performance analysis parameter of the performance analysis entry is obtained, and a performance analysis limit value is defined; The temperature value performance control unit is also used to use the performance control mode to perform processing on the performance control value when the performance analysis parameter is not less than the performance analysis definition value. After the processing is completed, the detection distinction parameter is obtained according to the processed performance control value and the pre-estimated temperature value. When the detection distinction parameter is not less than the detection distinction critical value and the performance control value has not completed the processing of all performance control modes, the performance analysis of the next type of performance control mode is performed on the processed performance control value according to the arrangement order of the performance control modes. When the detection distinction parameter is not less than the detection distinction critical value and the performance control value has completed the processing of all performance control modes, the performance control value is defined as a performance credible value. When the detection distinction parameter is less than the detection distinction critical value, the processed performance control value is defined as a performance credible value. The temperature value detection improvement unit is used to obtain the detection and measurement quantity of the distribution network cable head in each time period of size U, define the cable head detection and measurement critical quantity, and when the cable head detection and measurement quantity is not lower than the cable head detection and measurement critical quantity, perform improvement on the detection performance of the temperature value of the distribution network cable head of the temperature sensor, and when the cable head detection and measurement quantity is lower than the cable head detection and measurement critical quantity, no treatment is performed; In step 4, the interference amount of the performance control mode is obtained by the following method: obtain all the performance analysis items of the same performance control mode, perform addition processing on the performance analysis parameters of all the performance analysis items and take the average of the amount obtained by the addition processing, obtain the performance analysis average parameter Gda, define the performance analysis boundary quantity, when the performance analysis parameter of the performance analysis item is not lower than the performance analysis boundary quantity, define the performance analysis item as a significant variation item, when the performance analysis parameter of the performance analysis item is lower than the performance analysis boundary quantity, do not perform processing, define the total number of significant variation items as Fuq, arrange all the significant variation items in sequence according to the order of the performance analysis time points, perform subtraction operation on the performance analysis time points of a pair of significant variation items adjacent to each other after arrangement, obtain the significant variation time interval, perform addition processing on all the significant variation time intervals and obtain the average of the amount obtained by the addition, obtain the significant variation time interval mean Nih, and use the equation Obtain the interference value Tek of the performance control mode, where s1 is the mean parameter factor of performance analysis, s2 is the factor for the number of significant variation items, and s3 is the mean factor for the time interval of significant variation. The value of s1 is thirty-one percent, the value of s1 is twenty-eight percent, and the value of s3 is forty-seven percent.

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