CN-120595056-B - Zero-value insulator identification method and system based on multiple sensing modules

CN120595056BCN 120595056 BCN120595056 BCN 120595056BCN-120595056-B

Abstract

A zero-value insulator identification method and system based on multiple sensing modules. The method comprises the steps of firstly arranging space electric field probes in the space where two insulator strings are located and defining detection paths of the probes, then judging whether the insulator strings have string deflection or not by calculating the difference of the relative distances of the two insulator strings, respectively collecting space electric field effective values of the detection paths at the same moment if the insulator strings do not exist, judging whether zero-value insulators exist or not by calculating symmetry judging values, respectively collecting the space electric field effective values of the paths corresponding to the insulator strings at set sampling intervals if the insulator strings do not exist, and judging whether the zero-value insulators exist or not by calculating the electric field deviation rate of each section of sampling paths. The invention can accurately identify the zero value insulator in the insulator string under different postures, and has the advantages of non-contact, high real-time performance, adaptation to complex working conditions and the like.

Inventors

SONG HENGDONG
HAN XUECHUN
WANG YU
PAN LINGMIN
WANG HAILIANG
CHEN XUAN
ZHANG ZIYANG
CHEN YUHAN

Assignees

国网江苏省电力有限公司超高压分公司

Dates

Publication Date: 20260512
Application Date: 20250627

Claims (9)

1. A zero-value insulator identification method based on a multi-sensing module is characterized by comprising the following steps: Step S1, arranging space electric field probes in the space where two parallel insulator strings are located and defining detection paths of the probes, wherein the definition mode of each detection path comprises the following steps: A first detection path (4) which is positioned at the inner side of the first insulator chain and has a distance from the edge of the first umbrella skirt The first umbrella skirt edge is a first insulator string umbrella skirt edge on the side opposite to the second insulator string; a third detection path (6) which is positioned at the inner side of the second insulator chain and has a distance from the edge of the second umbrella skirt The second umbrella skirt edge is a second insulator string umbrella skirt edge on the side opposite to the first insulator string; The second probe detection path is the center line of the axis of the first insulator string and the axis of the second insulator string; step S2, judging whether the insulator strings have string deflection or not according to the difference of the relative distances of the two insulator strings, if not, executing the step S3, otherwise executing the step S4; S3, respectively collecting effective values of the space electric fields of all detection paths at the same moment, and judging whether zero-value insulators exist or not by calculating symmetry judgment values; And S4, independently acquiring the effective value of the space electric field on the corresponding path of the insulator string at a set sampling interval, and judging whether a zero-value insulator exists or not by calculating the electric field deviation rate on each section of sampling path.
2. A method for identifying a zero-valued insulator based on a multi-sensing module as defined in claim 1, In step S1, the spatial electric field probe is configured to collect spatial electric field amplitudes on corresponding detection paths, where the arrangement mode includes: a first spatial electric field probe (1) arranged in front of the initial insulator of the first insulator string and at a position opposite to the second insulator string; a third spatial electric field probe (3) is arranged at a position in front of the initial insulator of the second insulator string and opposite to the first insulator string; And the second space electric field probe (2) is arranged at the middle position in front of the initial insulator of the first insulator string and the second insulator string.
3. A method for identifying a zero-valued insulator based on a multi-sensing module as defined in claim 1, In step2, the judging mode of the string skew includes: Calibrating measuring points at the middle positions of the first insulator chain and the second insulator chain respectively And measuring point Measuring points Distance from the first insulator string start insulator, and measurement point The distance between the first insulator and the initial insulator of the second insulator string is the same; simultaneously measuring a second spatial electric field probe (2) and a measurement point using a distance sensor of the position of the second spatial electric field probe (2) Distance of (2) A second spatial electric field probe (2) and a measuring point Distance of (2) ; Calculation of And (3) with Absolute value of difference between Setting up Is of the threshold value of ; If it is Judging that the first insulator string and the second insulator string have no string deflection condition; If it is And judging that the first insulator string and the second insulator string have string deflection.
4. A method for identifying a zero-valued insulator based on a multi-sensing module as defined in claim 1, In step S3, when the insulator string has no string deflection, the three-probe method is adopted to identify the zero-value insulator from the vertical dimension, and the method comprises the following steps: Acquiring the space electric field amplitude values on a first detection path (4), a second detection path (5) and a third empty detection path respectively through a first space electric field probe (1), a second space electric field probe (2) and a third space electric field probe (3) and extracting effective values at the moment The obtained effective values of the space electric fields are respectively 、 And ; With a spatial electric field effective value on a second detection path (5) For the reference value, calculate respectively And (3) with 、 And (3) with Difference between: ; Wherein, the And The amplitude differences between the first detection path (4) and the third detection path (6) and the second detection path (5) are represented.
5. A method for identifying a zero-valued insulator based on a multi-sensing module as defined in claim 4, In step S3, the step of identifying the zero-value insulator by using the three-probe method further includes: For a pair of And Performing difference operation to obtain electric field symmetry failure determination value : ; Setting a symmetry-breaking threshold When (when) And when the zero-value insulator is judged to be absent, otherwise, the zero-value insulator is judged to be present.
6. A method for identifying a zero-valued insulator based on a multi-sensing module as defined in claim 1, In step S4, when the string deflection exists in the insulator string, zero value insulator identification is carried out from the horizontal dimension, and the method comprises the following steps: setting a sampling interval, and respectively acquiring the effective values of the space electric fields of sampling points on a first detection path (4) and a third detection path (6) through a first space electric field probe (1) and a third space electric field probe (3), wherein the effective values are recorded as And Wherein, the method comprises the steps of, The current sample point is indicated and, Representing the current sampling point Distance from the initial position; for the first detection path (4) and the third detection path (6), calculating the electric field difference value of two adjacent sampling points on the paths And : ; ; Wherein, the Representing the sampling interval, i.e. the distance between two adjacent sampling points.
7. A method for identifying a zero-valued insulator based on a multi-sensing module as defined in claim 6, wherein, In step S4, the step of identifying the zero-value insulator from the horizontal dimension further includes: According to the sampling interval, the electric field deviation rate on the first detection path (4) and the third detection path (6) is calculated, wherein the calculation formula is as follows: ; Wherein, the And The electric field deviation rates on the first detection path (4) and the third detection path (6) are respectively represented.
8. A method for identifying a zero-valued insulator based on a multi-sensing module as defined in claim 6, wherein, In step S4, the zero value insulator determination step includes: setting a discrimination threshold of electric field deviation rate When (when) When the insulator string of the first detection path (4) is in zero value, judging that the insulator string of the first detection path has zero value And judging that zero-value insulators exist on the insulator string where the third detection path (6) is located.
9. A zero-value insulator identification system based on a multi-sensing module, applying the zero-value insulator identification method as defined in any one of claims 1 to 8, characterized in that the system comprises: the electric field space setting module is used for arranging space electric field probes in the space where the two parallel insulator strings are located and defining detection paths of the probes; the string deviation condition judging module is used for judging whether the string deviation occurs to the two insulator strings or not by calculating the relative distance difference of the two insulator strings; the vertical dimension identification module is used for respectively acquiring the effective values of the space electric fields of all detection paths at the same moment and judging whether zero-value insulators exist or not by calculating symmetry judgment values; The horizontal dimension identification module is used for independently collecting space electric field effective values on paths corresponding to the insulator strings at set sampling intervals, and judging whether zero-value insulators exist or not by calculating electric field deviation rates on each section of sampling paths.

Description

Zero-value insulator identification method and system based on multiple sensing modules Technical Field The invention belongs to the field of transmission line safety detection, and particularly relates to a zero-value insulator identification method and system based on a multi-sensing module. Background The zero-value insulator detection is one of common work of power outage overhaul and live working of the power transmission line, and the aim of the zero-value insulator detection is to ensure the operation safety of the power transmission line and the personnel safety during live working. Aiming at the problems of low working efficiency, high danger coefficient and the like of the existing porcelain insulator detection methods such as a spark gap method, a distributed voltage detection method, an infrared thermal imaging detection method, an ultrasonic detection method, a resistance measurement method, an inductive coupling method and a capacitive coupling method. At present, the unmanned aerial vehicle is provided with a space electric field sensor as a brand new means, and the monitoring advantage is mainly realized in the following aspects that detection personnel do not need to directly contact high-voltage equipment and circuits, the risks of electric shock, high-altitude falling and the like are avoided, and the safety is obviously improved. The unmanned aerial vehicle is flexible, can reach and cover a large-area detection area fast, and detection efficiency is improved substantially. Meanwhile, the data can be monitored and transmitted in real time, so that technicians can conveniently judge and decide in time, and the inspection timeliness is enhanced. The non-contact detection is adopted, so that physical damage or interference to the insulator is avoided, the non-destructive detection trend is met, and the safe and stable operation of the power transmission line is facilitated. However, the space electric field data collected by the unmanned aerial vehicle needs to be subjected to complex data processing and analysis. In the data processing process, the accuracy and applicability of the algorithm can affect the final judgment result. If the data processing algorithm is not effective in removing noise and extracting useful information, it may result in a false assessment of the insulator status. For insulators of different types and specifications, the electric field distribution characteristics of the insulators may be different, and different analysis models need to be established. However, the research in this aspect is not deep enough, and there is a lack of sufficiently accurate electric field analysis models for various insulators, thereby affecting accuracy. Therefore, it is necessary to propose an accurate zero-value insulator identification method based on an electric field sensor so as to safely and efficiently complete detection of the zero-value insulator. Disclosure of Invention In order to solve the defects in the prior art, the invention provides a zero-value insulator identification method and system based on a multi-sensing module. The method comprises the steps of firstly arranging space electric field probes in the space where two insulator strings are located and defining detection paths of the probes, then judging whether the insulator strings have string deflection or not by calculating the difference of the relative distances of the two insulator strings, respectively collecting space electric field effective values of the detection paths at the same moment if the insulator strings do not exist, judging whether zero-value insulators exist or not by calculating symmetry judging values, respectively collecting the space electric field effective values of the paths corresponding to the insulator strings at set sampling intervals if the insulator strings do not exist, and judging whether the zero-value insulators exist or not by calculating the electric field deviation rate of each section of sampling paths. The first aspect of the invention provides a zero-value insulator identification method based on a multi-sensing module, which adopts the following technical scheme: step S1, arranging space electric field probes in the space where two parallel insulator strings are located and defining detection paths of the probes; step S2, judging whether the insulator strings have string deflection or not according to the difference of the relative distances of the two insulator strings, if not, executing the step S3, otherwise executing the step S4; S3, respectively collecting effective values of the space electric fields of all detection paths at the same moment, and judging whether zero-value insulators exist or not by calculating symmetry judgment values; And S4, independently acquiring the effective value of the space electric field on the corresponding path of the insulator string at a set sampling interval, and judging whether a zero-value insulator exists or not by calculating