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

Abstract

The invention relates to the technical field of big data processing, in particular to a multi-sensor data collecting and processing method and system used in the hot-line work process, and the method comprises the steps: obtaining the time domain current transmission stability of each insulator string according to the change condition of the transmission current leakage level of the insulator string in the time sequence; according to the distribution voltage rule violation degree and the difference condition of the distribution voltage data between each insulator and the adjacent insulator in the insulator string, the distribution voltage abnormal coefficient of each insulator is obtained; obtaining an insulation degradation index of each insulator string according to the time domain current transmission stability of the insulator string and the distribution voltage abnormal coefficient of the insulator; and carrying out live degradation detection on each insulator string on the high-voltage overhead line based on the insulation degradation index. According to the invention, the accuracy of live degradation monitoring of the insulator string on the high-voltage overhead line is improved.

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] The insulator strings on high-voltage overhead transmission lines can provide electrical insulation between the transmission lines and the towers. As the service time increases, some insulator strings may experience insulation degradation, thereby reducing the electrical insulation efficiency. The traditional method for monitoring the live degradation of insulator strings on high-voltage overhead lines is to use a distributed voltage sensor to perform a preset threshold judgment on the distributed voltage of each insulator in the insulator string. If the distributed voltage of an internal insulator is lower than the preset threshold, it is considered that the insulator string has an insulation degradation problem. In actual scenarios, in order to meet the different insulation requirements of different transmission line sections, there are differences in the transmission currents of the corresponding insulator strings in different sections, and there are also differences in the number of insulators inside them, which leads to inaccurate degradation monitoring results obtained by performing consistency threshold analysis on 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] An 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 transmission current compliance degree 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, the transmission current leakage level of each insulator string is obtained;

[0007] According to the variation of the transmission current leakage level of the insulator string in time sequence, the time domain current transmission stability of each insulator string is obtained; according to the regularity of the distributed voltage data of the insulators in each insulator string and the position distribution, the degree of violation of the distributed voltage law of each insulator in each insulator string is obtained; according to 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 the adjacent insulators, the distributed voltage anomaly coefficient of each insulator is obtained; according to the time domain current transmission stability of the insulator string and the distributed voltage anomaly coefficient of the insulator, the insulation degree of each insulator string is obtained; according to the insulation degree of the insulator string, the insulation degradation index of each insulator string is obtained;

[0008] Based on the insulation degradation index, each insulator string on the high-voltage overhead line is tested for live degradation.

[0009] Preferably, the method of 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 and the calibrated amplitude of the real-time transmission current of the high-voltage overhead line includes the following specific methods:

[0010] The ratio between the real-time transmission current data of the j-th 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 j-th 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, including the specific method of:

[0012] 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;

[0013] The mean value of the transmission current compliance levels of all insulator strings in the i-th transmission node is recorded as the first mean value; the ratio of the transmission current compliance level of the j-th insulator string in the i-th transmission node to the first mean 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.

[0014] Preferably, the method of obtaining the time domain current transmission stability of each insulator string according to the time sequence change of the transmission current leakage level of the insulator string includes the following specific methods:

[0015] A time domain parameter a is preset, and the first 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 coordinate and the transmission current leakage level of the insulator string as the vertical coordinate; the transmission current leakage level of the jth insulator string in the i-th transmission node at all moments in the adjacent time period is input into the two-dimensional coordinate system, and the least squares method is used to perform curve fitting to obtain the current leakage level change curve of the jth 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 jth insulator string in the adjacent time period and the reciprocal of the transmission current leakage level of the jth insulator string in the ith transmission node is taken as the time domain current transmission stability of the jth 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 consisting of the 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 consisting of the 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 distribution voltage data of all insulators except the kth insulator in the jth insulator string is recorded as the distribution 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 law 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 ith 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 centroid position 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 centroid position 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.

[0025] Preferably, the method of obtaining the abnormal coefficient of the distributed voltage of each insulator according to the degree of violation of the distributed voltage law and the difference in the distributed voltage data between each insulator and the 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 insulation degree of each insulator string is obtained according to the time domain current transmission stability of the insulator string and the distributed voltage anomaly coefficient of the insulator, including the specific method of:

[0028] The reciprocal of the cumulative sum of the distributed voltage anomaly coefficients of all insulators in the jth 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 step of obtaining the insulation degradation index of each insulator string according to the insulation degree of the insulator string comprises the following specific methods:

[0030] The normalized value of the ratio of the insulation degree of the jth insulator string in the ith transmission node to the average insulation degree of all insulator strings in all transmission nodes is used as the insulation degradation index of the jth insulator string in the ith 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 executable 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 according to the time sequence change of the transmission current leakage level of the insulator string; obtains the distributed voltage anomaly coefficient of each insulator according to 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 the adjacent insulator; obtains the insulation degradation index 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; and performs live degradation detection on each insulator string on the high-voltage overhead line based on the insulation degradation index. In this way, auxiliary analysis is performed by combining the transmission current characteristics of the insulator string and the distribution voltage change law of the internal insulator, thereby improving the accuracy of live degradation monitoring of the insulator string on the high-voltage overhead line. 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

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

[0035] Figure 2 The present invention is a flow chart showing the characteristic relationship of the multi-sensor data acquisition and processing method used in live working. DETAILED DESCRIPTION

[0036] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the multi-sensor data acquisition and processing method and system for live working according to the present invention, its specific implementation method, structure, features and effects, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[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 collection 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 provided by 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 fittings, and are connected to the crossarms in the overhead system that serve as grounding points 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 a good electrical isolation effect; and 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 may even 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 degree of compliance of the transmission current 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; obtain the transmission current leakage level of each insulator string based on the degree of compliance of the transmission current and the phase superposition of the real-time transmission current data of the insulator string in each transmission node.

[0046] It should be noted that when the insulation effect of the insulator string deteriorates, the charge in the high-voltage overhead line will dissipate to the outside, which will lead to leakage loss of the transmission current. Therefore, the real-time transmission current data performance 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 on the transmission node at the same location, and a single transmission node has an insulator string on each transmission line. Therefore, the phase difference of the real-time transmission current data of each insulator string 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 invention, since there is only loss in the current, the real-time transmission current of the insulator string is always less than the calibrated amplitude of the real-time transmission current of the high-voltage overhead line; therefore, if the amplitude level of the real-time transmission current data of the insulator string is lower than the calibrated amplitude of the real-time transmission current of the high-voltage overhead line, the higher the probability that the current has abnormal loss at the insulator string; then, 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, the specific method for obtaining the degree of compliance of the transmission current of each insulator string is as follows:

[0048] The ratio between the real-time transmission current data of the j-th insulator string in the i-th transmission node and the calibrated amplitude of the real-time transmission current of the high-voltage overhead line is used as the transmission current compliance degree of the j-th insulator string;

[0049] The specific formula is:

[0050]

[0051] In the formula, G i,j Indicates the degree of compliance of the transmission current of the jth insulator string in the i-th transmission node; I i,j represents the real-time transmission current data of the jth insulator string in the ith transmission node; 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 the 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, so that the three-phase phase superposition value is greater than 0; therefore, the larger the phase superposition value of the three-phase current of the insulator string is, the greater the possibility that the transmission node to which the insulator string belongs is degraded, and at the same time, if the transmission current compliance degree of the insulator string is poor in the transmission node, it further indicates that the current at the insulator string is likely to have high leakage; then 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 is analyzed, the specific method for obtaining the transmission current leakage level of each insulator string is:

[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 represents the transmission current leakage level of the jth insulator string in the i-th transmission node; G 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: According to the time-series variation of the transmission current leakage level of the insulator string, the time-domain current transmission stability of each insulator string is obtained; according to the regularity of the distributed voltage data of the insulators in each insulator string and the position distribution, the degree of violation of the distributed voltage law of each insulator in each insulator string is obtained; according to 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 the adjacent insulators, the distributed voltage anomaly coefficient of each insulator is obtained; according to the time-domain current transmission stability of the insulator string and the distributed voltage anomaly coefficient of the insulator, the insulation degree of each insulator string is obtained; according to the insulation degree 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 they are close to 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, according to the variation of the transmission current leakage level of the insulator string in time sequence, the specific method for obtaining the time domain current transmission stability of each insulator string is:

[0062] A time domain parameter a is preset, wherein this embodiment is described by taking a=10 as an example, and this embodiment is not specifically limited, 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 horizontal coordinate and the transmission current leakage level of the insulator string as the vertical coordinate; the transmission current leakage level of the jth 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 the least squares method is used for curve fitting to obtain the current leakage level change curve of the jth insulator string in 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 jth insulator string in the adjacent time period and the reciprocal of the transmission current leakage level of the jth insulator string in the i-th transmission node is taken as the time domain current transmission stability of the jth 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 a prior art and will not be elaborated in detail in this embodiment.

[0069] Preferably, in some implementations of the embodiments of the present invention, the distributed voltage inside a normal insulator string should present a variation pattern of high at both ends and low in the middle, while a deteriorated insulator string will destroy this regular variation; therefore, according to the regularity of the distributed voltage data of the insulators in each insulator string and the position distribution, the specific method for obtaining the degree of violation of the distributed voltage law of each insulator in each insulator string is:

[0070] For the kth insulator in the jth insulator string in the i-th transmission node, the Euclidean distance between the centroid position 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 centroid position 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 consisting of the 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 consisting of the 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 distribution voltage data of all insulators except the kth insulator in the jth insulator string is recorded as the distribution 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 jth 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 distribution voltage variation rule of the insulator string being high at both ends and low in the middle; the Pearson correlation coefficient is a 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 the deterioration of the insulator will reduce the distributed voltage, and the reduced distributed voltage will spread to the adjacent insulators, so that the distributed voltage of the adjacent insulators increases, then if the adjacent insulators of a certain insulator have higher distributed voltages than the insulator, and the degree of violation of the distributed voltage law of the insulator is higher, the probability of degradation of the insulator is higher; therefore, according to the degree of violation of the distributed voltage law and the difference in distributed voltage data between each insulator and the adjacent insulators in the insulator string, the specific method for obtaining the distributed voltage anomaly coefficient of each insulator is:

[0080] The mean value 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 value of the kth insulator; the ratio of the adjacent distributed voltage mean value 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;

[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 V represents the distributed voltage data of the kth insulator in the jth insulator string in the i-th transmission node; i,j,k It indicates the degree of violation of the distributed voltage law of the kth insulator in the jth insulator string in the ith transmission node; norm() indicates 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 according to 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:

[0085] The reciprocal of the cumulative sum of the distributed voltage anomaly coefficients of all insulators in the jth insulator string in the i-th transmission node is recorded as the insulation effect factor of the jth insulator string; the product of the insulation effect factor of the jth insulator string and the time domain current transmission stability of the jth insulator string in the i-th transmission node is taken as the insulation degree of the jth 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 the transmission node will have insulation degradation, the closer the insulation degree of the insulator string is to the average insulation degree of all insulator strings in all transmission nodes, the better the insulation effect of the insulator string is, and the less likely the insulation degradation of the insulator string is; therefore, according to the insulation degree of the insulator string, the specific method for obtaining the insulation degradation index of each insulator string is as follows:

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

[0091] The specific formula is:

[0092]

[0093] In the formula, 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] So far, the insulation degradation index of each insulator string is obtained through the above method.

[0095] Step S004: Perform 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 the high-voltage overhead line based on the insulation degradation index is:

[0097] Two threshold parameters T1 and T2 are preset, wherein this embodiment is described by taking T1=0.38 and T2=0.68 as an example, and this embodiment is not specifically limited, wherein 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, it implements the steps of step S001 to step S004 of the multi-sensor data acquisition and processing method for live working.

[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 protection scope 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 transmission current compliance degree 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, the transmission current leakage level of each insulator string is obtained; According to the variation of the transmission current leakage level of the insulator string in time sequence, the time domain current transmission stability of each insulator string is obtained; according to the regularity of the distributed voltage data of the insulators in each insulator string and the position distribution, the degree of violation of the distributed voltage law of each insulator in each insulator string is obtained; according to 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 the adjacent insulators, the distributed voltage anomaly coefficient of each insulator is obtained; according to the time domain current transmission stability of the insulator string and the distributed voltage anomaly coefficient of the insulator, the insulation degree of each insulator string is obtained; according to the insulation degree of the insulator string, the insulation degradation index of each insulator string is obtained; 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 specific method of 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 and the calibrated amplitude of the real-time transmission current of the high-voltage overhead line is as follows: The ratio between the real-time transmission current data of the j-th 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 j-th insulator string.

3. The multi-sensor data acquisition and processing method for live working according to claim 1 is characterized in that: The specific method of obtaining the transmission current leakage level of each insulator string according to the transmission current compliance degree and analyzing the phase superposition of the real-time transmission current data of the insulator string in each transmission node includes: 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; The mean value of the transmission current compliance levels of all insulator strings in the i-th transmission node is recorded as the first mean value; the ratio of the transmission current compliance level of the j-th insulator string in the i-th transmission node to the first mean 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.

4. The multi-sensor data acquisition and processing method for live working according to claim 1 is characterized in that: The specific method of obtaining the time domain current transmission stability of each insulator string according to the change of the transmission current leakage level of the insulator string in time sequence includes: A time domain parameter a is preset, and the previous a seconds between the current time and the current time are recorded as the adjacent time period; a two-dimensional coordinate system is constructed with time as the horizontal coordinate and the transmission current leakage level of the insulator string as the vertical coordinate; The transmission current leakage level of the jth insulator string in the i-th transmission node at all times in the adjacent time period is input into a two-dimensional coordinate system, and the least square method is used to perform curve fitting to obtain the current leakage level variation curve of the jth insulator string in the adjacent time period; 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 jth insulator string in the adjacent time period and the reciprocal of the transmission current leakage level of the jth insulator string in the ith transmission node is taken as the time domain current transmission stability of the jth insulator string.

5. The multi-sensor data acquisition and processing method for live working according to claim 1 is characterized in that: 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: 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; The sequence consisting of the 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 consisting of the 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; 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 distribution voltage data of all insulators except the kth insulator in the jth insulator string is recorded as the distribution voltage difference sequence of the kth insulator in the jth insulator string; 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; 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 law of the kth insulator.

6. The multi-sensor data acquisition and processing method for live working according to claim 5 is characterized in that: The specific 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 is as follows: The Euclidean distance between the centroid position 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 centroid position 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.

7. The multi-sensor data acquisition and processing method for live working according to claim 1 is characterized in that: The method of obtaining the abnormal coefficient of the distributed voltage of each insulator according to the degree of violation of the distributed voltage law and the difference in the distributed voltage data between each insulator and the adjacent insulators in the insulator string includes the following specific methods: The mean of the distributed voltage data between the k-1th insulator and the k+11th 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.

8. The multi-sensor data acquisition and processing method for live working according to claim 1 is characterized in that: The specific 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 is as follows: The reciprocal of the cumulative sum of the distributed voltage anomaly coefficients of all insulators in the jth 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.

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

10. 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 process as described in any one of claims 1-9 are implemented.

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