Multi-sensor data acquisition and processing method and system for live working process

Abstract

The present application relates to big data processing technical field, specifically relates to a kind of multi-sensor data acquisition processing method and system for live working process, comprising: according to the change situation of transmission current leakage level of insulator string in time sequence, the time-domain current transmission stability of each insulator string is obtained;According to the degree of violation of distribution voltage law and the difference condition of distribution voltage data between each insulator and adjacent insulator in insulator string, the distribution voltage abnormality coefficient of each insulator is obtained;According to the time-domain current transmission stability of insulator string and the distribution voltage abnormality coefficient of insulator, the insulator deterioration index of each insulator string is obtained;Based on insulator deterioration index, live deterioration detection is carried out on each insulator string on high-voltage overhead line.The present application improves the accuracy of live deterioration monitoring of insulator string on high-voltage overhead line.

Description

Technical Field

[0001] The present invention relates to the technical field of big data processing, and in particular to a method and system for collecting and processing multi-sensor data during live working. Background Art

[0002] Insulator strings on high-voltage overhead transmission lines provide electrical insulation between the transmission lines and the towers. However, as they age, some insulator strings may experience insulation degradation, reducing their efficiency. Traditional methods for monitoring live degradation of insulator strings on high-voltage overhead lines use distributed voltage sensors to determine the distributed voltage of each insulator in the string based on a preset threshold. If the distributed voltage of any internal insulator falls below the preset threshold, the insulator string is deemed to have insulation degradation. However, in real-world scenarios, to meet differing insulation requirements across different transmission line sections, the transmission currents of the corresponding insulator strings in different sections vary, as does the number of insulators within them. This results in inaccurate degradation monitoring results obtained through consistency threshold analysis of each insulator string. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a multi-sensor data acquisition and processing method and system for live working.

[0004] One embodiment of the present invention provides a multi-sensor data acquisition and processing method for live working, the method comprising the following steps:

[0005] Obtaining real-time transmission current data of each insulator string in each transmission node on the high-voltage overhead line, distributed voltage data of each insulator in each insulator string, and the calibrated amplitude of the real-time transmission current of the high-voltage overhead line;

[0006] By analyzing the difference between the real-time transmission current data of each insulator string and the calibrated amplitude of the real-time transmission current of the high-voltage overhead line, the degree of compliance of the transmission current of each insulator string is obtained. Based on the degree of compliance of the transmission current and the phase superposition of the real-time transmission current data of the insulator strings at each transmission node, the transmission current leakage level of each insulator string is obtained.

[0007] According to the change of the transmission current leakage level of the insulator string over time, the time-domain current transmission stability of each insulator string is obtained; according to the regularity and position distribution of the distribution voltage data of the insulator in each insulator string, the distribution voltage regularity violation degree of each insulator in each insulator string is obtained; according to the distribution voltage regularity violation degree and the difference of the distribution voltage data between each insulator and the adjacent insulator in the insulator string, the distribution voltage abnormality coefficient of each insulator is obtained; according to the time-domain current transmission stability of the insulator string and the distribution voltage abnormality coefficient of the insulator, the insulation degree of each insulator string is obtained; according to the insulation degree of the insulator string, the insulation deterioration index of each insulator string is obtained.

[0008] Based on the insulation deterioration index, the live deterioration detection of each insulator string on the high-voltage overhead line is performed.

[0009] Preferably, the transmission current compliance degree of each insulator string is obtained by analyzing the difference between the real-time transmission current data of each insulator string and the calibrated amplitude value of the real-time transmission current of the high-voltage overhead line, and the specific method comprises:

[0010] The ratio between the real-time transmission current data of the jth insulator string in the ith transmission node and the calibrated amplitude value of the real-time transmission current of the high-voltage overhead line is taken as the transmission current compliance degree of the jth insulator string.

[0011] Preferably, the transmission current leakage level of each insulator string is obtained according to the transmission current compliance degree and the phase superposition of the real-time transmission current data of the insulator string in each transmission node, and the specific method comprises:

[0012] The real-time transmission current data of all insulator strings in the ith transmission node are phase superimposed to obtain the current phase superposition value of the ith transmission node;

[0013] The mean value of the transmission current compliance degrees of all insulator strings in the ith transmission node is denoted as the first mean value; the ratio between the transmission current compliance degree of the jth insulator string in the ith transmission node and the first mean value is denoted as the transmission current leakage factor of the jth insulator string; the product of the absolute value of the current phase superposition value of the ith transmission node and the transmission current leakage factor of the jth insulator string is taken as the transmission current leakage level of the jth insulator string.

[0014] Preferably, the time-domain current transmission stability of each insulator string is obtained according to the change of the transmission current leakage level of the insulator string over time, and the specific method comprises:

[0015] A time domain parameter a is preset, and the a seconds before the current moment are recorded as the adjacent time period. A two-dimensional coordinate system is constructed with time as the horizontal axis and the transmission current leakage level of the insulator string as the vertical axis. The transmission current leakage level of the j-th insulator string in the i-th transmission node at all times in the adjacent time period is input into the two-dimensional coordinate system, and a curve fitting is performed using the least squares method to obtain the current leakage level variation curve of the j-th insulator string in the adjacent time period.

[0016] The normalized value of the product of the reciprocal of the standard deviation of all data points in the current leakage level variation curve of the j-th insulator string in the adjacent time period and the reciprocal of the transmission current leakage level of the j-th insulator string in the i-th transmission node is taken as the time domain current transmission stability of the j-th insulator string.

[0017] Preferably, the method of obtaining the degree of violation of the distributed voltage law of each insulator in each insulator string according to the regularity of the distributed voltage data of the insulators in each insulator string and the position distribution includes the following specific methods:

[0018] According to the position distribution of the insulators in each insulator string, the position distribution distance of the kth insulator in the jth insulator string in the i-th transmission node is obtained;

[0019] The sequence of position distribution distances of all insulators in the j-th insulator string is recorded as the position distribution sequence of the j-th insulator string; the sequence of distributed voltage data of all insulators in the j-th insulator string is recorded as the distributed voltage sequence of the j-th insulator string;

[0020] The sequence consisting of the position distribution distances of all insulators except the kth insulator in the jth insulator string is recorded as the position distribution difference sequence of the kth insulator in the jth insulator string; the sequence consisting of the distributed voltage data of all insulators except the kth insulator in the jth insulator string is recorded as the distributed voltage difference sequence of the kth insulator in the jth insulator string;

[0021] The Pearson correlation coefficient between the position distribution difference sequence of the kth insulator and the distributed voltage difference sequence of the kth insulator is recorded as the distributed voltage regularity of the kth insulator; the Pearson correlation coefficient between the position distribution sequence of the jth insulator string and the distributed voltage sequence of the jth insulator string is recorded as the overall distributed voltage regularity of the jth insulator string;

[0022] The ratio of the distributed voltage regularity of the kth insulator to the overall distributed voltage regularity of the jth insulator string is taken as the degree of violation of the distributed voltage regularity of the kth insulator.

[0023] Preferably, the method of obtaining the position distribution distance of the kth insulator in the jth insulator string in the i-th transmission node according to the position distribution of the insulators in each insulator string includes the following specific methods:

[0024] The Euclidean distance between the center of mass of the k-th insulator and the crossarm position of the i-th transmission node is recorded as the first distance; the Euclidean distance between the center of mass of the k-th insulator and the conductor position of the i-th transmission node is recorded as the second distance; the minimum value of the first distance and the second distance is taken as the position distribution distance of the k-th insulator.

[0025] Preferably, the method of obtaining the distributed voltage anomaly coefficient of each insulator according to the degree of violation of the distributed voltage law and the difference in distributed voltage data between each insulator and adjacent insulators in the insulator string includes the following specific methods:

[0026] The mean of the distributed voltage data between the k-1th insulator and the k+1th insulator in the jth insulator string in the ith transmission node is recorded as the adjacent distributed voltage mean of the kth insulator; the ratio of the adjacent distributed voltage mean of the kth insulator to the distributed voltage data of the kth insulator is recorded as the adjacent distributed voltage difference value of the kth insulator; the normalized value of the product of the adjacent distributed voltage difference value of the kth insulator and the degree of violation of the distributed voltage law of the kth insulator is taken as the distributed voltage anomaly coefficient of the kth insulator.

[0027] Preferably, the method of obtaining the insulation degree of each insulator string according to the time domain current transmission stability of the insulator string and the distributed voltage anomaly coefficient of the insulator includes the following specific methods:

[0028] The reciprocal of the cumulative sum of the distributed voltage anomaly coefficients of all insulators in the j-th insulator string in the i-th transmission node is recorded as the insulation effect factor of the j-th insulator string; the product of the insulation effect factor of the j-th insulator string and the time domain current transmission stability of the j-th insulator string in the i-th transmission node is taken as the insulation degree of the j-th insulator string.

[0029] Preferably, the method of obtaining the insulation degradation index of each insulator string according to the insulation degree of the insulator string includes:

[0030] The normalized value of the ratio of the insulation degree of the j-th insulator string in the i-th transmission node to the average insulation degree of all insulator strings in all transmission nodes is used as the insulation degradation index of the j-th insulator string in the i-th transmission node.

[0031] The present invention also proposes a multi-sensor data acquisition and processing system for live working, comprising a memory, a processor, and a computer program stored in the memory and runnable on the processor. When the processor executes the computer program, it implements any one of the steps of the multi-sensor data acquisition and processing method for live working.

[0032] The beneficial effects of the technical solution of the present invention are as follows: the present invention obtains the time-domain current transmission stability of each insulator string based on the temporal changes in the transmission current leakage level of the insulator string; obtains the distributed voltage anomaly coefficient of each insulator based on the degree of violation of the distributed voltage law and the difference in distributed voltage data between each insulator and its adjacent insulators within the insulator string; obtains the insulation degradation index of each insulator string based on the time-domain current transmission stability of the insulator string and the distributed voltage anomaly coefficient of the insulator; and performs live degradation detection on each insulator string on a high-voltage overhead line based on the insulation degradation index. This method, by combining the transmission current characteristics of the insulator string with the distributed voltage variation law of the internal insulators for auxiliary analysis, further improves the accuracy of live degradation monitoring of insulator strings on high-voltage overhead lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 This is a flowchart of the steps of the multi-sensor data acquisition and processing method used in live working processes of the present invention;

[0035] Figure 2 The figure is a flow chart showing the characteristic relationships of the method for collecting and processing multi-sensor data during live working according to the present invention. DETAILED DESCRIPTION

[0036] To further illustrate the technical means and effectiveness of the present invention to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, describes in detail the specific implementation, structure, features, and effectiveness of the multi-sensor data acquisition and processing method and system for live working according to the present invention. In the following description, different references to "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0037] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0038] The specific scheme of the multi-sensor data acquisition and processing method and system for live working provided by the present invention is described in detail below with reference to the accompanying drawings.

[0039] See also Figure 1 , which shows a flowchart of a method for collecting and processing multi-sensor data during live working according to an embodiment of the present invention, the method comprising the following steps:

[0040] Step S001: Acquire the real-time transmission current data of each insulator string in each transmission node on the high-voltage overhead line, the distributed voltage data of each insulator in each insulator string, and the calibrated amplitude of the real-time transmission current of the high-voltage overhead line.

[0041] It should be noted that insulator strings often play an insulating role in high-voltage overhead lines. They are connected to the transmission lines containing high-voltage three-phase electricity through hardware, and are connected to the crossarms in the overhead system that serve as grounding through hanging points. The insulator contains multiple insulator structures inside, and each insulator is made of specific insulating materials, so that the high current in the transmission line and the overhead crossarms have good electrical isolation effects. However, with the increase in the length of use in complex outdoor weather, the insulation effect of some insulator strings may deteriorate. If the insulator strings are not inspected and maintained in time, it will lead to loss of transmitted power, and in severe cases it may lead to safety risks. Therefore, it is necessary to monitor the degradation of the insulator strings under energized conditions.

[0042] Specifically, it is necessary to first collect the real-time transmission current data of each insulator string in each transmission node on the high-voltage overhead line, the distributed voltage data of each insulator in each insulator string, and the calibrated amplitude of the real-time transmission current of the high-voltage overhead line. The specific process is as follows:

[0043] The real-time transmission current data of each insulator string in each transmission node on the high-voltage overhead line is read through the transmission current sensor module; the calibrated amplitude of the real-time transmission current of the high-voltage overhead line is read through the current transmission task system; the distributed voltage data of each insulator in each insulator string in each transmission node on the high-voltage overhead line is read through the distributed voltage sensor module.

[0044] At this point, the above method is used to obtain the real-time transmission current data of each insulator string in each transmission node on the high-voltage overhead line, the distributed voltage data of each insulator in each insulator string, and the calibrated amplitude of the real-time transmission current of the high-voltage overhead line.

[0045] Step S002: Obtain the transmission current compliance degree of each insulator string by analyzing the difference between the real-time transmission current data of each insulator string and the calibrated amplitude of the real-time transmission current of the high-voltage overhead line; and obtain the transmission current leakage level of each insulator string according to the transmission current compliance degree and the phase superposition of the real-time transmission current data of the insulator strings in each transmission node.

[0046] It should be noted that when the insulation effect of the insulator string deteriorates, the charges in the high-voltage overhead line will escape to the outside world, thereby causing leakage loss of the transmission current, so the real-time transmission current data of the insulator string can be analyzed; at the same time, in order to ensure the transmission efficiency of the power system, the high-voltage transmission system often uses three-phase alternating current as the transmission object, that is, there are three parallel transmission lines in the same transmission node, and there is an insulator string on each transmission line in a single transmission node, so the phase difference of the real-time transmission current data of the insulator strings in the same transmission node can be combined to further evaluate the transmission current leakage level at the insulator string.

[0047] Preferably, in some implementations of the embodiments of the present application, since the current only exists in the loss case, the real-time transmission current of the insulator string is constant and smaller than the calibrated amplitude of the real-time transmission current of the high-voltage overhead line; therefore, the lower the amplitude level of the real-time transmission current data of the insulator string compared to the calibrated amplitude of the real-time transmission current of the high-voltage overhead line, the higher the probability of abnormal loss of the current at the insulator string; therefore, the specific method for obtaining the transmission current compliance degree of each insulator string by analyzing the difference between the real-time transmission current data of each insulator string in each transmission node and the calibrated amplitude of the real-time transmission current of the high-voltage overhead line is:

[0048] The ratio between the real-time transmission current data of the jth insulator string in the ith transmission node and the calibrated amplitude of the real-time transmission current of the high-voltage overhead line is taken as the transmission current compliance degree of the jth insulator string.

[0049] The specific formula is:

[0050]

[0051] In the formula, G i,j represents the transmission current compliance degree of the jth insulator string in the ith transmission node; I i,j represents the real-time transmission current data of the jth insulator string in the ith transmission node; and I' represents the calibrated amplitude of the real-time transmission current of the high-voltage overhead line.

[0052] Preferably, in some implementations of the embodiments of the present invention, since the phase superposition value of the three phases in a normal three-phase current should be 0, when the insulator string in the transmission node is degraded, the phase superposition law of the three-phase current will be destroyed, making the three-phase phase superposition value greater than 0; therefore, the larger the phase superposition value of the three-phase current of the insulator string, the greater the possibility that the transmission node to which the insulator string belongs is degraded. At the same time, if the transmission current compliance rate of the insulator string in the transmission node is poor, it further indicates that there is a high possibility of high current leakage at the insulator string; then, based on the transmission current compliance level and analyzing the phase superposition of the real-time transmission current data of the insulator string in each transmission node, the specific method for obtaining the transmission current leakage level of each insulator string is as follows:

[0053] Performing phase superposition on the real-time transmission current data of all insulator strings in the i-th transmission node to obtain the current phase superposition value of the i-th transmission node;

[0054] The average value of the transmission current compliance level of all insulator strings in the i-th transmission node is recorded as the first average value; the ratio between the transmission current compliance level of the j-th insulator string in the i-th transmission node and the first average value is recorded as the transmission current leakage factor of the j-th insulator string; the product of the absolute value of the current phase superposition value of the i-th transmission node and the transmission current leakage factor of the j-th insulator string is taken as the transmission current leakage level of the j-th insulator string;

[0055] The specific formula is:

[0056]

[0057] Where, IX i,j G represents the transmission current leakage level of the jth insulator string in the i-th transmission node; i,j Indicates the degree of compliance of the transmission current of the jth insulator string in the i-th transmission node; W represents the mean value of the transmission current compliance level of all insulator strings in the i-th transmission node; i represents the current phase superposition value of the i-th transmission node; || represents the absolute value.

[0058] So far, the transmission current leakage level of each insulator string in each transmission node is obtained through the above method.

[0059] Step S003: Based on the temporal variation of the transmission current leakage level of the insulator string, the time-domain current transmission stability of each insulator string is obtained; based on the regularity of the distributed voltage data of the insulators in each insulator string and their position distribution, the degree of violation of the distributed voltage law of each insulator in each insulator string is obtained; based on the degree of violation of the distributed voltage law and the difference in the distributed voltage data between each insulator in the insulator string and its adjacent insulators, the distributed voltage anomaly coefficient of each insulator is obtained; based on the time-domain current transmission stability of the insulator string and the distributed voltage anomaly coefficient of the insulator, the insulation level of each insulator string is obtained; based on the insulation level of the insulator string, the insulation degradation index of each insulator string is obtained.

[0060] It should be noted that considering that the insulation degradation of the insulator string will destroy the stability of the transmission current in the transmission line, the time-domain current transmission stability of the insulator string is obtained by analyzing the stability performance of the transmission current leakage level of the insulator string; at the same time, considering that the electric field lines of the edge insulators inside the insulator string will narrow when approaching the conductor or crossarm, while the electric field lines of the insulators in the middle position are relatively discrete and uniform, the distributed voltage inside the normal insulator string will show the characteristics of high at both ends and low in the middle. Therefore, the insulation abnormality of each insulator can be further judged by combining the analysis of the degree of violation of the distributed voltage law of each insulator in the insulator string.

[0061] Preferably, in some implementations of the embodiments of the present invention, a specific method for obtaining the time-domain current transmission stability of each insulator string according to the temporal variation of the transmission current leakage level of the insulator string is:

[0062] A time domain parameter a is preset, wherein this embodiment is described by taking a=10 as an example and is not specifically limited in this embodiment, wherein a is determined according to specific implementation conditions;

[0063] The a seconds before the current moment are recorded as the adjacent time period. A two-dimensional coordinate system is constructed with time as the abscissa and the transmission current leakage level of the insulator string as the ordinate. The transmission current leakage level of the j-th insulator string in the i-th transmission node at all times within the adjacent time period is input into the two-dimensional coordinate system and a curve fitting is performed using the least squares method to obtain the current leakage level variation curve of the j-th insulator string within the adjacent time period.

[0064] The normalized value of the product of the reciprocal of the standard deviation of all data points in the current leakage level variation curve of the j-th insulator string in the adjacent time period and the reciprocal of the transmission current leakage level of the j-th insulator string in the i-th transmission node is taken as the time domain current transmission stability of the j-th insulator string;

[0065] The specific formula is:

[0066]

[0067] In the formula, IT i,j represents the time domain current transmission stability of the jth insulator string in the i-th transmission node; σ i,j represents the standard deviation of all data points in the current leakage level variation curve of the jth insulator string in the adjacent period; IX i,j represents the transmission current leakage level of the jth insulator string in the i-th transmission node; norm() represents the linear normalization function.

[0068] It should be noted that the smaller the standard deviation of the current leakage level change curve of the insulator string in adjacent time periods, and the smaller the transmission current leakage level of the insulator string, the more stable and excellent the time domain performance of the transmission current of the insulator string is; the least squares method is an existing technology and will not be described in detail in this embodiment.

[0069] Preferably, in some implementations of the embodiments of the present invention, the distributed voltage within a normal insulator string should exhibit a variation pattern of high at both ends and low in the middle, while a deteriorated insulator string will disrupt this regular variation. Therefore, based on the regularity of the distributed voltage data of the insulators within each insulator string and their position distribution, a specific method for obtaining the degree of violation of the distributed voltage pattern of each insulator within each insulator string is as follows:

[0070] For the kth insulator in the jth insulator string in the i-th transmission node, the Euclidean distance between the center of mass of the kth insulator and the crossarm position of the i-th transmission node is recorded as the first distance; the Euclidean distance between the center of mass of the kth insulator and the conductor position of the i-th transmission node is recorded as the second distance; the minimum value of the first distance and the second distance is taken as the position distribution distance of the kth insulator;

[0071] The sequence of position distribution distances of all insulators in the j-th insulator string is recorded as the position distribution sequence of the j-th insulator string; the sequence of distributed voltage data of all insulators in the j-th insulator string is recorded as the distributed voltage sequence of the j-th insulator string;

[0072] The sequence consisting of the position distribution distances of all insulators except the kth insulator in the jth insulator string is recorded as the position distribution difference sequence of the kth insulator in the jth insulator string; the sequence consisting of the distributed voltage data of all insulators except the kth insulator in the jth insulator string is recorded as the distributed voltage difference sequence of the kth insulator in the jth insulator string;

[0073] The Pearson correlation coefficient between the position distribution difference sequence of the kth insulator and the distributed voltage difference sequence of the kth insulator is recorded as the distributed voltage regularity of the kth insulator; the Pearson correlation coefficient between the position distribution sequence of the jth insulator string and the distributed voltage sequence of the jth insulator string is recorded as the overall distributed voltage regularity of the jth insulator string;

[0074] The ratio of the distributed voltage regularity of the kth insulator to the overall distributed voltage regularity of the jth insulator string is taken as the degree of violation of the distributed voltage regularity of the kth insulator;

[0075] The specific formula is:

[0076]

[0077] Where V i,j,k Indicates the degree of violation of the distributed voltage law of the kth insulator in the jth insulator string in the i-th transmission node; PCC i,j,k represents the regularity of the distributed voltage of the kth insulator in the jth insulator string in the i-th transmission node; PCC i,j It represents the overall distributed voltage regularity of the j-th insulator string in the i-th transmission node.

[0078] It should be noted that the larger the ratio of the distributed voltage regularity of the kth insulator to the overall distributed voltage regularity of the jth insulator string, the less the kth insulator satisfies the variation rule that the distributed voltage within the insulator string is high at both ends and low in the middle; the Pearson correlation coefficient is the prior art and will not be elaborated in detail in this embodiment.

[0079] Preferably, in some implementations of the embodiments of the present invention, since insulator degradation may reduce the distributed voltage, and this reduced distributed voltage may spread to adjacent insulators, causing the distributed voltage of the adjacent insulators to increase, the more adjacent insulators of a certain insulator have higher distributed voltages than the insulator, and the higher the degree of violation of the distributed voltage law of the insulator, the higher the probability of degradation of the insulator. Therefore, according to the degree of violation of the distributed voltage law and the difference in distributed voltage data between each insulator and its adjacent insulators in the insulator string, the specific method for obtaining the distributed voltage anomaly coefficient of each insulator is as follows:

[0080] The mean of the distributed voltage data between the k-1th insulator and the k+1th insulator in the jth insulator string in the i-th transmission node is recorded as the adjacent distributed voltage mean of the k-th insulator; the ratio of the adjacent distributed voltage mean of the k-th insulator to the distributed voltage data of the k-th insulator is recorded as the adjacent distributed voltage difference of the k-th insulator; the normalized value of the product of the adjacent distributed voltage difference of the k-th insulator and the degree of violation of the distributed voltage law of the k-th insulator is recorded as the distributed voltage anomaly coefficient of the k-th insulator;

[0081] The specific formula is:

[0082]

[0083] In the formula, IN i,j,k represents the distributed voltage anomaly coefficient of the kth insulator in the jth insulator string in the i-th transmission node; represents the mean value of the adjacent distributed voltage of the kth insulator in the jth insulator string in the i-th transmission node; U i,j,k represents the distributed voltage data of the kth insulator in the jth insulator string in the i-th transmission node; V i,j,k It represents the degree of violation of the distributed voltage law of the kth insulator in the jth insulator string in the i-th transmission node; norm() represents the linear normalization function.

[0084] Preferably, in some implementations of the embodiments of the present invention, for a single insulator string, if the time-domain current transmission stability of the insulator string is greater and the distributed voltage anomaly coefficient is smaller, it means that the insulation effect of the insulator string is better and the deterioration possibility is lower; then, based on the time-domain current transmission stability of the insulator string and the distributed voltage anomaly coefficient of the insulator, the specific method for obtaining the insulation degree of each insulator string is as follows:

[0085] The reciprocal of the cumulative sum of the distributed voltage anomaly coefficients of all insulators in the j-th insulator string in the i-th transmission node is recorded as the insulation effect factor of the j-th insulator string; the product of the insulation effect factor of the j-th insulator string and the time domain current transmission stability of the j-th insulator string in the i-th transmission node is taken as the insulation degree of the j-th insulator string;

[0086] The specific formula is:

[0087]

[0088] In the formula, IF i,j It represents the insulation degree of the jth insulator string in the i-th transmission node; IT i,j represents the time domain current transmission stability of the jth insulator string in the i-th transmission node; K i,jrepresents the number of all insulators in the jth insulator string in the i-th transmission node; IN i,j,k It represents the distributed voltage anomaly coefficient of the kth insulator in the jth insulator string in the i-th transmission node.

[0089] Preferably, in some implementations of the embodiments of the present invention, since only a few insulator strings in a transmission node may experience insulation degradation, the closer the insulation level of an insulator string is to the average insulation level of all insulator strings in all transmission nodes, the better the insulation effect of the insulator string, and the less likely the insulator string will experience insulation degradation. Therefore, the specific method for obtaining the insulation degradation index of each insulator string based on the insulation level of the insulator string is as follows:

[0090] The normalized value of the ratio between the insulation level of the j-th insulator string in the i-th transmission node and the average insulation level of all insulator strings in all transmission nodes is used as the insulation degradation index of the j-th insulator string in the i-th transmission node;

[0091] The specific formula is:

[0092]

[0093] Where, IJ i,j represents the insulation degradation index of the jth insulator string in the i-th transmission node; IF i,j represents the insulation degree of the jth insulator string in the i-th transmission node; It represents the mean insulation degree of all insulator strings in all transmission nodes; norm() represents the linear normalization function.

[0094] At this point, the insulation degradation index of each insulator string is obtained through the above method.

[0095] Step S004: performing live degradation detection on each insulator string on the high-voltage overhead line based on the insulation degradation index.

[0096] Preferably, in some implementations of the embodiments of the present invention, the specific method for performing live degradation detection on each insulator string on a high-voltage overhead line based on the insulation degradation index is:

[0097] Two threshold parameters T1 and T2 are preset. In this embodiment, T1=0.38 and T2=0.68 are used as examples for description. This embodiment does not specifically limit the parameters. T1 and T2 are determined according to specific implementation conditions.

[0098] For any insulator string on a high-voltage overhead line, if the insulation degradation index of the insulator string is greater than or equal to T2, the insulator string is recorded as having insulation degradation and requires manual maintenance; if the insulation degradation index of the insulator string is less than T1, the insulator string is recorded as having qualified insulation.

[0099] See also Figure 2 , which shows a characteristic relationship flow chart for multi-sensor data acquisition and processing during live working;

[0100] Through the above steps, the multi-sensor data acquisition and processing method for live working is completed.

[0101] The present invention also proposes a multi-sensor data acquisition and processing system for live working, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of step S001 to step S004 of the multi-sensor data acquisition and processing method for live working are implemented.

[0102] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-sensor data acquisition and processing method for live working, characterized in that: The method comprises the following steps: Obtaining real-time transmission current data of each insulator string in each transmission node on the high-voltage overhead line, distributed voltage data of each insulator in each insulator string, and the calibrated amplitude of the real-time transmission current of the high-voltage overhead line; By analyzing the difference between the real-time transmission current data of each insulator string and the calibrated amplitude of the real-time transmission current of the high-voltage overhead line, the degree of compliance of the transmission current of each insulator string is obtained. Based on the degree of compliance of the transmission current and the phase superposition of the real-time transmission current data of the insulator strings at each transmission node, the transmission current leakage level of each insulator string is obtained. Based on the temporal variation of the transmission current leakage level of the insulator string, the time-domain current transmission stability of each insulator string is obtained; based on the regularity of the distributed voltage data of the insulators in each insulator string and their position distribution, the degree of violation of the distributed voltage law of each insulator in each insulator string is obtained; based on the degree of violation of the distributed voltage law and the difference in the distributed voltage data between each insulator and its adjacent insulators in the insulator string, the distributed voltage anomaly coefficient of each insulator is obtained; based on the time-domain current transmission stability of the insulator string and the distributed voltage anomaly coefficient of the insulator, the insulation level of each insulator string is obtained; based on the insulation level of the insulator string, the insulation degradation index of each insulator string is obtained; The method of obtaining the degree of violation of the distributed voltage law of each insulator in each insulator string based on the regularity of the distributed voltage data of the insulators in each insulator string and the position distribution includes the following specific methods: According to the position distribution of insulators in each insulator string, the The first transmission node Insulator string The location distribution distance of each insulator; The first The sequence of the position distribution distances of all insulators in an insulator string is recorded as The position distribution sequence of the insulator strings; The sequence of distributed voltage data of all insulators in an insulator string is recorded as The distributed voltage sequence of an insulator string; The first Insulator string except the The sequence of the position distribution distances of all insulators except the insulator is recorded as Insulator string The position distribution difference sequence of the insulators; Insulator string except the The sequence of distributed voltage data of all insulators except the first insulator is recorded as Insulator string The distributed voltage difference sequence of each insulator; The first The position distribution difference sequence of the insulator is the same as that of the The Pearson correlation coefficient between the distribution voltage difference series of the insulators is denoted as The regularity of the voltage distribution of the insulator; The position distribution sequence of the insulator string is the same as that of the The Pearson correlation coefficient between the distribution voltage series of the insulator strings is denoted as Regularity of the overall distributed voltage of each insulator string; The first The regularity of the voltage distribution of the first insulator is similar to that of the The ratio of the overall distribution voltage regularity of the insulator string is used as the The method for obtaining the distributed voltage anomaly coefficient of each insulator according to the degree of violation of the distributed voltage law and the difference in distributed voltage data between each insulator and adjacent insulators in the insulator string includes: The first The first transmission node Insulator string Insulator and The mean value of the distributed voltage data between insulators is recorded as The average of the adjacent distributed voltages of the insulators; The average value of the adjacent distributed voltage of the insulator is The ratio of the distributed voltage data of the insulator is recorded as The adjacent distributed voltage difference value of the insulator; The difference between the adjacent distributed voltages of the first insulator and the The normalized value of the product of the degree of violation of the distributed voltage law of the insulators is taken as the first The distributed voltage anomaly coefficient of each insulator; Based on the insulation degradation index, each insulator string on the high-voltage overhead line is tested for live degradation.

2. The multi-sensor data acquisition and processing method for live working according to claim 1 is characterized in that: The method of analyzing the difference between the real-time transmission current data of each insulator string and the calibrated amplitude of the real-time transmission current of the high-voltage overhead line to obtain the degree of compliance of the transmission current of each insulator string includes the following specific methods: The first The first transmission node The ratio between the real-time transmission current data of the first insulator string and the calibrated amplitude of the real-time transmission current of the high-voltage overhead line is used as the first The transmission current of each insulator string meets the standard.

3. The multi-sensor data acquisition and processing method for live working according to claim 1, characterized in that: The specific method of obtaining the transmission current leakage level of each insulator string based on the degree of transmission current compliance and analyzing the phase superposition of the real-time transmission current data of the insulator string in each transmission node includes: The first The real-time transmission current data of all insulator strings in the transmission node are phase-superimposed to obtain the The current phase superposition value of each transmission node; The first The average value of the transmission current compliance level of all insulator strings in the transmission node is recorded as the first average value; The first transmission node The ratio of the transmission current compliance level of the insulator string to the first average value is recorded as the first The transmission current leakage factor of the insulator string; The absolute value of the current phase superposition value of the first transmission node is The product of the transmission current leakage factors of the insulator strings is taken as the The transmission current leakage level of each insulator string.

4. The multi-sensor data acquisition and processing method for live working according to claim 1, characterized in that: The specific method of obtaining the time-domain current transmission stability of each insulator string according to the time-series variation of the transmission current leakage level of the insulator string is as follows: Preset a time domain parameter , the previous time between the current time Seconds are recorded as adjacent periods; A two-dimensional coordinate system is constructed with time as the abscissa and the transmission current leakage level of the insulator string as the ordinate; All moments in the adjacent time period will be placed The first transmission node The transmission current leakage level of the insulator string is input into the two-dimensional coordinate system, and the least square method is used to perform curve fitting to obtain the The current leakage level variation curve of each insulator string in adjacent time periods; The first The reciprocal of the standard deviation of all data points in the current leakage level variation curve of the insulator string in the adjacent period is The first transmission node The normalized value of the product of the reciprocals of the transmission current leakage levels of the first insulator string is taken as the The time domain current transfer stability of an insulator string.

5. The multi-sensor data acquisition and processing method for live working according to claim 1 is characterized in that: The first The first transmission node Insulator string The location distribution distance of each insulator includes the following specific methods: The first The center of mass position of the first insulator is The Euclidean distance between the cross-arm positions of the transmission nodes is recorded as the first distance; The center of mass position of the first insulator is The Euclidean distance between the wire positions of the transmission nodes is recorded as the second distance; the minimum value of the first distance and the second distance is recorded as the first distance. The location distribution distance of the insulators.

6. The multi-sensor data acquisition and processing method for live working according to claim 1, characterized in that: The specific method of obtaining the insulation degree of each insulator string based on the time domain current transmission stability of the insulator string and the distributed voltage anomaly coefficient of the insulator includes: The first The first transmission node The reciprocal of the sum of the distributed voltage anomaly coefficients of all insulators in an insulator string is recorded as The insulation effect factor of the insulator string; The insulation effect factor of the first insulator string is The first transmission node The product of the time domain current transmission stability of the insulator string is used as the The insulation degree of an insulator string.

7. The multi-sensor data acquisition and processing method for live working according to claim 1, characterized in that: The specific method of obtaining the insulation degradation index of each insulator string according to the insulation degree of the insulator string is as follows: The first The first transmission node The normalized value of the ratio between the insulation degree of the insulator string and the average insulation degree of all insulator strings in all transmission nodes is used as the first The first transmission node Insulation degradation index of an insulator string.

8. A multi-sensor data acquisition and processing system for live working, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the computer program, the steps of the multi-sensor data acquisition and processing method for live working are implemented as described in any one of claims 1 to 7.

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