CN112904158A - Acoustic-electric joint detection method for determining partial discharge position in GIS - Google Patents
Acoustic-electric joint detection method for determining partial discharge position in GIS Download PDFInfo
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- CN112904158A CN112904158A CN202110075218.3A CN202110075218A CN112904158A CN 112904158 A CN112904158 A CN 112904158A CN 202110075218 A CN202110075218 A CN 202110075218A CN 112904158 A CN112904158 A CN 112904158A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1209—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using acoustic measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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Abstract
The application discloses an acoustoelectric joint detection method for determining a partial discharge position in a GIS, which comprises the following steps: measuring the length, the equivalent width and the equivalent height of the GIS cavity standard segment; determining the installation positions of six ultrahigh frequency sensors and ultrasonic sensors which are respectively installed at different positions; measuring time differences of acoustic signals respectively received by the five groups of ultrasonic sensors and ultrahigh frequency signals of the ultrahigh frequency sensors; establishing a coordinate system based on the cavity, and respectively calculating and determining X-axis, Y-axis and Z-axis coordinates of the occurrence position of partial discharge; the method has the advantages that the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position are compared, so that the deviation between the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position is within the error range set according to the actual detection precision requirement, and the problem that the partial discharge position in the GIS is difficult to determine is solved.
Description
Technical Field
The application relates to the technical field of a method for determining a partial discharge position in a GIS, in particular to an acoustoelectric joint detection method for determining the partial discharge position in the GIS.
Background
In the production, assembly and operation processes of gas insulated metal enclosed switchgear (GIS for short), the GIS inevitably generates partial discharge accidents of metal particles, if the partial discharge accidents cannot be timely and effectively processed, the GIS can cause further insulation degradation, and finally can cause breakdown of an insulating medium.
The prior art relates to an electrical detection method and a non-electrical detection method aiming at the determination of the partial discharge position of the metal particle, the non-electrical detection method cannot accurately determine the fault position generally, and the electrical detection method has high requirements on the installation position of a sensor, so that the electrical detection method can only judge the fault type and preliminarily position the fault, and the electrical detection method and the non-electrical detection method are required to be used together. However, the existing combined use method of the electrical detection method and the non-electrical detection method has the defect that the fault cannot be judged by analyzing gas components because the partial discharge time is short and the gas reaction condition cannot be met; because the problems of detection errors and detection dead angles are easily caused by light refraction and reflection, the algorithm process is complex, the discharge position cannot be accurately determined in the metal particle movement process in the test and engineering application, and the detection and positioning precision is low.
Disclosure of Invention
The application provides an acoustoelectric joint detection method for determining a partial discharge position in a GIS (geographic information System), which aims to solve the problems that the discharge position in the existing GIS cavity is difficult to determine, detection errors and detection dead angles are easily generated by the existing determination method, and the detection and positioning accuracy is low.
The technical scheme adopted by the application is as follows:
an acoustoelectric joint detection method for determining a partial discharge position in a GIS comprises the following steps:
measuring the length L of the standard segment of the GIS cavity 7;
measuring the equivalent width W of the GIS cavity 7;
measuring the equivalent height H of the GIS cavity 7;
determining the installation positions of six ultrahigh frequency sensors and ultrasonic sensors which are respectively installed at different positions;
measuring the time difference DeltaT between the acoustic signals received by the five groups of ultrasonic sensors and the ultrahigh frequency signal received by the ultrahigh frequency sensor 11、△T2、△T3、△T4、△T5；
The occurrence position of the partial discharge of the metal particles in the GIS cavity 7 is preliminarily determined by observation:
establishing a coordinate system based on the cavity;
the X-axis coordinate of the location where the partial discharge occurs is determined according to:
wherein QXIs the distance of the partial discharge position from the transverse boundary of the chamber, DeltaT1Is the time difference, DeltaT, measured at the position of the first ultrasonic sensor 2 and the ultrahigh frequency sensor 12Is provided with a second ultrasonic sensor 3 and the ultrahigh frequency sensor 1Time difference of position measurement;
the Y-axis coordinate of the location where the partial discharge occurs is determined according to:
wherein QYIs the distance of the partial discharge position from the longitudinal boundary of the chamber, DeltaT2Is the time difference, DeltaT, measured at the location of the second ultrasonic sensor 3 and the UHF sensor 13The time difference is measured by the third ultrasonic sensor 4 and the ultrahigh frequency sensor 1;
and determining the Z-axis coordinate of the occurrence position of the partial discharge according to the following formula:
wherein QZIs the distance of the partial discharge position from the vertical boundary of the chamber, Δ T4Is the time difference, DeltaT, measured at the position of the fourth ultrasonic sensor 5 and the ultrahigh frequency sensor 15The time difference is measured by the fifth ultrasonic sensor 6 and the ultrahigh frequency sensor 1;
and comparing X-axis, Y-axis and Z-axis coordinates of the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position to ensure that the deviation between the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position is within a set error range.
Preferably, before determining the installation positions of the six uhf sensors 1 and the ultrasonic sensor, which are respectively installed at different positions, the method further includes:
and determining the frequency f of a signal sent by the ultrahigh frequency sensor arranged at the outer edge of the test cavity so as to determine the size of the test error.
Preferably, the measuring a length L of the standard segment of the GIS cavity 7, the measuring an equivalent width W of the GIS cavity 7, and the measuring an equivalent height H of the GIS cavity 7 includes:
measuring the length L of the standard segment of the GIS cavity 7 by using a measuring tape;
measuring the equivalent width W of the GIS cavity 7 by using a measuring tape;
the equivalent height H of the GIS cavity 7 is measured with a tape measure.
Preferably, the measuring of the time difference Δ T1, Δ T2, Δ T3, Δ T4, Δ T5 after receiving the uhf signals of the five groups of uhf sensors and the acoustic signals of the ultrasonic sensors, respectively, includes:
adjusting the voltage between the polar plates;
the motion process of the metal particles is shot through a high-speed camera, and the partial discharge position of the metal particles in the GIS cavity is observed.
Preferably, the adjusting of the voltage between the plates, shooting the movement process of the metal particles through a high-speed camera, and observing the partial discharge position of the metal particles in the GIS cavity includes:
adjusting the voltage between the polar plates to 26 kV;
and measuring by using a high-speed camera with a frame frequency of 2000Hz to obtain the continuous displacement process of the metal particles in the horizontal direction, the vertical direction and the vertical direction within a set time, and observing the partial discharge position of the metal particles in the GIS cavity.
Preferably, the preliminary determination of the partial discharge position of the metal particles in the GIS cavity 7 by observation includes:
and preliminarily determining the occurrence position of the partial discharge according to the voltage between the polar plates, the shooting frame frequency of the high-speed camera, the frequency of the ultrahigh-frequency sensor and the continuous displacement of the metal particles under the action of the electric field.
Preferably, the length L of the standard segment of the GIS cavity 7 is measured; measuring the equivalent width W of the GIS cavity 7; measuring the equivalent height H of the GIS cavity 7; measuring the time difference Delta T between the acoustic signals received by five groups of ultrasonic sensors and the ultrahigh frequency signals received by the ultrahigh frequency sensors1、△T2、△T3、△T4、△T5The method comprises the following steps:
measuring the length L, equivalent width W and equivalent height H of the standard section of the GIS cavity 7, and respectively receiving acoustic signals of five groups of ultrasonic sensors and ultrahigh frequency sensingTime difference Delta T of ultrahigh frequency signal of device1、△T2、△T3、△T4、△T5Data, at least 3 times more;
and respectively taking the average value of the measurement data.
Preferably, after the deviation between the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position is ensured to be within the set error range by comparing the X-axis, Y-axis and Z-axis coordinates of the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position, the method includes:
if the deviation between the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position is not within the set error range, preliminarily determining the partial discharge occurrence position of the metal particles in the GIS cavity by observing;
and measures again the time difference DeltaT between the sound signals received by the five groups of ultrasonic sensors and the ultrahigh frequency signals received by the ultrahigh frequency sensor 11、△T2、△T3、△T4、△T5；
Recalculating coordinate values of an X axis, a Y axis and a Z axis of a position where partial discharge occurs in the cavity;
until the deviation between the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position is within the set error range.
The technical scheme of the application has the following beneficial effects:
1. by using the ultrasonic signal and the ultrahigh frequency signal with higher propagation speed, the defect that the fault cannot be judged by analyzing gas components because the partial discharge time is shorter and the gas reaction condition cannot be met is overcome.
2. The sound and electricity combined detection method for determining the partial discharge position in the GIS overcomes the defects of detection errors and detection dead angles caused by light refraction and reflection, and therefore the position of a fault point is accurately determined.
3. The method is simple and convenient to calculate, has obvious physical significance, and solves the problem that the discharge position is difficult to determine in the movement process of the metal particles in the test and engineering application.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of an acoustoelectric joint detection method for determining a partial discharge position in a GIS according to the present application;
FIG. 2 is a schematic diagram of the test apparatus of the present application;
FIG. 3 is a right side view of FIG. 2;
FIG. 4 is a left side view of FIG. 2;
in the figure:
1-ultrahigh frequency sensor, 2-first ultrasonic sensor, 3-second ultrasonic sensor, 4-third ultrasonic sensor, 5-fourth ultrasonic sensor, 6-fifth ultrasonic sensor and 7-GIS cavity.
Detailed Description
Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely as exemplifications of systems and methods consistent with certain aspects of the application, as recited in the claims.
Referring to fig. 1, a flowchart of an acoustoelectric joint detection method for determining a partial discharge position in a GIS according to the present application is shown.
The application provides an acoustoelectric joint detection method for determining a partial discharge position in a GIS, which comprises the following steps:
as shown in fig. 2, measuring the standard segment length L of the GIS cavity 7;
measuring the equivalent width W of the GIS cavity 7;
measuring the equivalent height H of the GIS cavity 7;
determining the installation positions of six ultrahigh frequency sensors and ultrasonic sensors which are respectively installed at different positions;
measuring the time difference DeltaT between the acoustic signals received by the five groups of ultrasonic sensors and the ultrahigh frequency signal received by the ultrahigh frequency sensor 11、△T2、△T3、△T4、△T5；
The occurrence position of the partial discharge of the metal particles in the GIS cavity 7 is preliminarily determined by observation:
establishing a coordinate system based on the cavity;
the X-axis coordinate of the location where the partial discharge occurs is determined according to:
as shown in fig. 3 and 4, wherein QXIs the distance of the partial discharge position from the transverse boundary of the chamber, DeltaT1Is the time difference, DeltaT, measured at the position of the first ultrasonic sensor 2 and the ultrahigh frequency sensor 12The time difference is measured by the positions of the second ultrasonic sensor 3 and the ultrahigh frequency sensor 1;
the Y-axis coordinate of the location where the partial discharge occurs is determined according to:
wherein QYIs the distance of the partial discharge position from the longitudinal boundary of the chamber, DeltaT2Is the time difference, DeltaT, measured at the location of the second ultrasonic sensor 3 and the UHF sensor 13The time difference is measured by the third ultrasonic sensor 4 and the ultrahigh frequency sensor 1;
and determining the Z-axis coordinate of the occurrence position of the partial discharge according to the following formula:
wherein QZIs the distance of the partial discharge position from the vertical boundary of the chamber, Δ T4Is the time difference, DeltaT, measured at the position of the fourth ultrasonic sensor 5 and the ultrahigh frequency sensor 15The time difference is measured by the fifth ultrasonic sensor 6 and the ultrahigh frequency sensor 1;
and comparing X-axis, Y-axis and Z-axis coordinates of the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position to ensure that the deviation between the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position is within a set error range.
Before determining the installation positions of the six ultrahigh frequency sensors and the ultrasonic sensor which are respectively installed at different positions, the method further comprises the following steps:
because the particle charge amount is different under different frequencies and the electric field force is different, the frequency f of a signal sent by an ultrahigh frequency sensor arranged at the outer edge of the test cavity needs to be determined so as to determine the stress condition of the particles in the electric field and the error range of the test.
The measuring of the length L of the standard segment of the GIS cavity 7, the measuring of the equivalent width W of the GIS cavity 7 and the measuring of the equivalent height H of the GIS cavity 7 comprise the following steps:
measuring the length L of the standard segment of the GIS cavity 7 by using a measuring tape;
measuring the equivalent width W of the GIS cavity 7 by using a measuring tape;
the equivalent height H of the GIS cavity 7 is measured with a tape measure.
The measurement of the time difference Δ T1, Δ T2, Δ T3, Δ T4 and Δ T5 after receiving the uhf signals of the five groups of uhf sensors and the acoustic signals of the ultrasonic sensors respectively includes:
adjusting the voltage between the polar plates;
the motion process of the metal particles is shot through a high-speed camera, and the partial discharge position of the metal particles in the GIS cavity is observed.
Adjusting voltage between the polar plate, shooting the metal particle motion process through high-speed camera appearance, observing the partial discharge position of metal particle in the GIS cavity, include:
adjusting the voltage between the polar plates to 26 kV;
and measuring by using a high-speed camera with a frame frequency of 2000Hz to obtain the continuous displacement process of the metal particles in the horizontal direction, the vertical direction and the vertical direction within a set time, and observing the partial discharge position of the metal particles in the GIS cavity.
In the embodiment, 100 metal aluminum particles with the diameter of 2mm are weighed to obtain 1.1613g of total weight, so that the mass of 1 metal aluminum particle with the diameter of 2mm is 1.1613 multiplied by 10 < -5 > kg, when the voltage applied between electrodes is 26kV, the metal particles are measured by a high-speed camera with the frame frequency of 200Hz to obtain the continuous displacement of the metal particles in the horizontal direction, the vertical direction and the vertical direction within a period of time, and the positions of occurrence of partial discharge are determined by recording the time of signals received by an ultrahigh frequency sensor and an ultrasonic sensor and taking the difference value of the time.
The method for preliminarily determining the partial discharge position of the metal particles in the GIS cavity 7 through observation comprises the following steps:
and preliminarily determining the occurrence position of the partial discharge according to the voltage between the polar plates, the shooting frame frequency of the high-speed camera, the frequency of the ultrahigh-frequency sensor and the continuous displacement of the metal particles under the action of the electric field.
The length L of the standard segment of the GIS cavity 7 is measured; measuring the equivalent width W of the GIS cavity 7; measuring the equivalent height H of the GIS cavity 7; measuring the time difference Delta T between the acoustic signals received by five groups of ultrasonic sensors and the ultrahigh frequency signals received by the ultrahigh frequency sensors1、△T2、△T3、△T4、△T5The method comprises the following steps:
measuring the length L, the equivalent width W and the equivalent height H of the standard section of the GIS cavity 7 and the time difference Delta T between the sound signals of the five groups of ultrasonic sensors and the ultrahigh frequency signals of the ultrahigh frequency sensors respectively1、△T2、△T3、△T4、△T5Data, at least 3 times more;
and respectively taking the average value of the measurement data.
The method for ensuring that the deviation between the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position is within the set error range by comparing the X-axis coordinates, the Y-axis coordinates and the Z-axis coordinates of the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position includes:
if the deviation between the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position is not within the set error range, preliminarily determining the partial discharge occurrence position of the metal particles in the GIS cavity by observing;
and measures the time difference delta T between the sound signals received by the five groups of ultrasonic sensors and the ultrahigh frequency signals received by the ultrahigh frequency sensor 1 respectively1、△T2、△T3、△T4、△T5；
Recalculating coordinate values of an X axis, a Y axis and a Z axis of a position where partial discharge occurs in the cavity;
and the deviation between the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position is within a set error range, so that the measurement error is greatly reduced, and the detection and positioning precision of the discharge position in the GIS cavity is improved.
According to the method, the position of the metal particle in partial discharge is calculated by acquiring the time difference between the ultrasonic signal with the higher propagation speed and the ultrahigh frequency signal, and the defect that the fault cannot be judged by analyzing gas components because the partial discharge time is shorter and the gas reaction condition cannot be met is overcome.
The sound and electricity combined detection method for determining the partial discharge position in the GIS overcomes the defects of detection errors and detection dead angles caused by light refraction and reflection, and therefore the position of a fault point is accurately determined.
The method is simple and convenient to calculate, has obvious physical significance, and solves the problem that the discharge position is difficult to determine in the movement process of the metal particles in the test and engineering application.
The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.
Claims (8)
1. An acoustoelectric joint detection method for determining a partial discharge position in a GIS is characterized by comprising the following steps:
measuring the length L of a standard segment of the GIS cavity (7);
measuring the equivalent width W of the GIS cavity (7);
measuring the equivalent height H of the GIS cavity (7);
determining the installation positions of six ultrahigh frequency sensors and ultrasonic sensors which are respectively installed at different positions;
measuring the time difference Delta T between the acoustic signals received by the five groups of ultrasonic sensors and the ultrahigh frequency signals received by the ultrahigh frequency sensor (1)1、△T2、△T3、△T4、△T5；
The position of the partial discharge of the metal particles in the GIS cavity (7) is preliminarily determined by observation:
establishing a coordinate system based on the cavity;
the X-axis coordinate of the location where the partial discharge occurs is determined according to:
wherein QXIs the distance of the partial discharge position from the transverse boundary of the chamber, DeltaT1Is the time difference, delta T, measured at the position of the first ultrasonic sensor (2) and the ultrahigh frequency sensor (1)2The time difference is measured by the positions of the second ultrasonic sensor (3) and the ultrahigh frequency sensor (1);
the Y-axis coordinate of the location where the partial discharge occurs is determined according to:
wherein QYIs a partial dischargeDistance of position from longitudinal boundary of cavity, delta T2Is the time difference, delta T, measured at the position of the second ultrasonic sensor (3) and the ultrahigh frequency sensor (1)3The time difference is measured by the positions of the third ultrasonic sensor (4) and the ultrahigh frequency sensor (1);
and determining the Z-axis coordinate of the occurrence position of the partial discharge according to the following formula:
wherein QZIs the distance of the partial discharge position from the vertical boundary of the chamber, Δ T4Is the time difference, delta T, measured at the position of the fourth ultrasonic sensor (5) and the ultrahigh frequency sensor (1)5The time difference is measured by the positions of the fifth ultrasonic sensor (6) and the ultrahigh frequency sensor (1);
and comparing X-axis, Y-axis and Z-axis coordinates of the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position to ensure that the deviation between the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position is within a set error range.
2. The acoustoelectric joint detection method for determining the partial discharge position in the GIS according to claim 1, wherein before determining the installation positions of six ultrahigh frequency sensors and ultrasonic sensors respectively installed at different positions, the method further comprises:
and determining the frequency f of a signal sent by the ultrahigh frequency sensor (1) arranged at the outer edge of the GIS cavity (7) so as to determine the size of the test error.
3. The acoustic-electric joint detection method for determining the partial discharge position in the GIS according to claim 1, wherein the measuring of the length L of the standard segment of the GIS cavity (7), the measuring of the equivalent width W of the GIS cavity (7), and the measuring of the equivalent height H of the GIS cavity (7) comprises:
measuring the length L of the standard segment of the GIS cavity (7) by using a measuring tape;
measuring the equivalent width W of the GIS cavity (7) by using a measuring tape;
and measuring the equivalent height H of the GIS cavity (7) by using a measuring tape.
4. The method according to claim 1, wherein the time difference Δ T between the time when the UHF signal of the UHF sensor and the time when the acoustic signal of the ultrasonic sensor are received respectively is measured1、△T2、△T3、△T4、△T5Then, the method comprises the following steps:
adjusting the voltage between the polar plates;
the motion process of the metal particles is shot through a high-speed camera, and the partial discharge position of the metal particles in the GIS cavity is observed.
5. The acoustoelectric joint detection method for determining the partial discharge position in the GIS according to claim 4, wherein the adjusting of the inter-plate voltage, the shooting of the movement process of the metal particles by a high-speed camera and the observation of the partial discharge position of the metal particles in the GIS cavity comprise:
adjusting the voltage between the polar plates to 26 kV;
and measuring by using a high-speed camera with a frame frequency of 2000Hz to obtain the continuous displacement process of the metal particles in the horizontal direction, the vertical direction and the vertical direction within a set time, and observing the partial discharge position of the metal particles in the GIS cavity.
6. The acoustoelectric joint detection method for determining the partial discharge position in the GIS according to claim 5, wherein the preliminary determination of the partial discharge position of the metal particles in the GIS cavity (7) by observation comprises:
and preliminarily determining the occurrence position of the partial discharge according to the voltage between the polar plates, the shooting frame frequency of the high-speed camera, the frequency of the ultrahigh-frequency sensor and the continuous displacement of the metal particles under the action of the electric field.
7. The acoustoelectric joint detection method for determining the position of partial discharge in the GIS according to claim 6, characterized in that the length L of the standard segment of the GIS cavity (7) is measured; measuring the equivalent width W of the GIS cavity (7); measuring the equivalent height H of the GIS cavity (7); measuring the time difference Delta T between the acoustic signals received by five groups of ultrasonic sensors and the ultrahigh frequency signals received by the ultrahigh frequency sensors1、△T2、△T3、△T4、△T5The method comprises the following steps:
measuring the length L, the equivalent width W and the equivalent height H of the standard section of the GIS cavity (7) and the time difference Delta T between the sound signals of the five groups of ultrasonic sensors and the ultrahigh frequency signals of the ultrahigh frequency sensors respectively1、△T2、△T3、△T4、△T5Data, at least 3 times more;
and respectively taking the average value of the measurement data.
8. The method according to claim 7, wherein the step of comparing the X-axis coordinates, the Y-axis coordinates and the Z-axis coordinates of the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position to ensure that the deviation between the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position is within a set error range comprises the following steps:
if the deviation between the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position is not within the set error range, preliminarily determining the partial discharge occurrence position of the metal particles in the GIS cavity by observing;
and measuring again the time difference DeltaT between the sound signals received by the five groups of ultrasonic sensors and the ultrahigh frequency signals received by the ultrahigh frequency sensor (1)1、△T2、△T3、△T4、△T5；
Recalculating coordinate values of an X axis, a Y axis and a Z axis of a position where partial discharge occurs in the cavity;
until the deviation between the preliminarily determined partial discharge occurrence position and the calculated partial discharge occurrence position is within the set error range.
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| CN113589116A (en) * | 2021-08-11 | 2021-11-02 | 山东通广电子有限公司 | Method and system for detecting partial discharge position |
| CN117929909A (en) * | 2024-03-25 | 2024-04-26 | 甘肃巨腾电力设备有限公司 | Hidden danger detection system for high-voltage switch cabinet |
| CN113589116B (en) * | 2021-08-11 | 2024-06-04 | 山东通广电子股份有限公司 | Method and system for detecting partial discharge position |
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