CN112924833B - Switch cabinet partial discharge detection device and method based on ultrasonic sensor array - Google Patents
Switch cabinet partial discharge detection device and method based on ultrasonic sensor array Download PDFInfo
- Publication number
- CN112924833B CN112924833B CN202110327132.5A CN202110327132A CN112924833B CN 112924833 B CN112924833 B CN 112924833B CN 202110327132 A CN202110327132 A CN 202110327132A CN 112924833 B CN112924833 B CN 112924833B
- Authority
- CN
- China
- Prior art keywords
- ultrasonic sensor
- sensor array
- switch cabinet
- module
- partial discharge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
- G01R31/1227—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 of components, parts or materials
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a switch cabinet partial discharge detection device and method based on an ultrasonic sensor array, wherein the device comprises the ultrasonic sensor array, a power supply module, an information transmission module and a processor module, the processor module is respectively and electrically connected with the ultrasonic sensor array, the information transmission module and the power supply module, and a positioning algorithm module is embedded in the processor module; the ultrasonic monitoring system comprises a switch cabinet, a plurality of ultrasonic sensor arrays, a positioning algorithm module and a processor module, wherein the ultrasonic sensor arrays are arranged on the switch cabinet and used for collecting partial discharge signals of the switch cabinet, the positioning algorithm module is used for carrying out sound source positioning according to the signals collected by the ultrasonic sensor arrays, and the processor module is in communication connection with a remote monitoring terminal through an information transmission module. According to the switch cabinet partial discharge detection device and method based on the ultrasonic sensor array, provided by the invention, the ultrasonic array sensor is used for acquiring partial discharge signals caused by defects of the switch cabinet and carrying out positioning analysis to obtain discharge position information, so that the manual workload is greatly reduced, and the accuracy of electric power overhaul operation is improved.
Description
Technical Field
The invention relates to the technical field of power equipment detection, in particular to a switch cabinet partial discharge detection device and method based on an ultrasonic sensor array.
Background
The switch cabinet is one of the most important and the most complicated equipment in the power system, has important influence on the operation of the whole system, and the insulation degradation phenomenon is difficult to avoid in the operation process, and the insulation degradation can cause partial discharge, if let its development, can cause serious damage to the insulation, even loses dielectric property, and many switch cabinet burning loss and explosion accidents are all caused by the process. Because the cubical switchboard is numerous, the distribution is extensive, only a small part installs on-line monitoring system, to the cubical switchboard of the overwhelming majority, all overhauls under the power failure state, but the power failure overhauls time interval long, difficult in time discovers partial discharge fault. In the daily operation process, the operation and maintenance personnel also can use the partial discharge detection equipment to detect partial discharge signals outside the switch cabinet, and because the detection sensitivity and the accuracy are not enough, and a detection period exists, the partial discharge fault is difficult to find in time. If the partial discharge characteristic of the electric equipment in the accident latency period can be monitored in real time, whether partial discharge and the discharge type occur or not is automatically judged, the discharge point is positioned and processed in time, the fault of the electric equipment of the high-voltage switch cabinet can be effectively prevented, and the electric equipment is prevented from being suffered in the bud.
There have been a lot of researches on the mechanism, phenomenon and detection method of partial discharge at home and abroad. The existing methods for detecting the partial discharge of the switch cabinet mainly include an ultrasonic method, a transient-state ground voltage method, a pulse current method, an ultrahigh frequency method and the like based on the phenomena of sound, light, electricity, magnetism, generation of chemical substances and the like accompanying the occurrence of the partial discharge. In the aspect of post-data processing, the problems of identification and classification of partial discharge are studied, and are mainly divided into a traditional pattern identification method and a machine learning method, and in recent years, a deep learning technology is rapidly developed, and is applied to solving the problem of fault prediction. However, the pulse current method has strong anti-interference capability due to the direct access of the pulse current method to the high-voltage end, but has certain influence on a high-voltage line; the high frequency causes the problems of complex and difficult sensor design, high impedance matching design difficulty of subsequent circuits, incapability of quantifying the apparent discharge amount of a measured partial discharge signal, overlarge sensor size and the like; the transient voltage-to-ground voltage method is widely applicable and simple in measurement, but the problems of low measurement precision, inaccurate measurement discharge times and the like are caused by multiple refractions and reflections of high-frequency electromagnetic waves in a switch cabinet. The ultrasonic positioning method has simple principle, directly utilizes the time delay of each ultrasonic signal to position, has simple calculation and convenient grasp, can directly realize space positioning and is easy to realize on-line detection. Therefore, the method for detecting the partial discharge caused by the defects of the switch cabinet based on the ultrasonic array is significant.
Disclosure of Invention
The invention aims to provide a switch cabinet partial discharge detection device and method based on an ultrasonic sensor array.
In order to achieve the purpose, the invention provides the following scheme:
an ultrasonic sensor array-based switch cabinet partial discharge detection device, comprising: the ultrasonic monitoring system comprises an ultrasonic sensor array, a power supply module, an information transmission module and a processor module, wherein the processor module is electrically connected with the ultrasonic sensor array, the information transmission module and the power supply module respectively, and a positioning algorithm module is embedded in the processor module;
the ultrasonic sensor array is arranged on the wall of the switch cabinet and used for collecting partial discharge signals of the switch cabinet, the positioning algorithm module is used for carrying out sound source positioning according to the signals collected by the ultrasonic sensor array, and the processor module is in communication connection with the remote monitoring terminal through the information transmission module.
Furthermore, the size of the ultrasonic sensor array structure is 4 multiplied by 4 ultrasonic sensor array elements, the center frequency is 100kHz, the frequency range is 50kHz-150kHz, and the ultrasonic sensor material is selected as piezoelectric ceramic.
Furthermore, the ultrasonic sensor array is provided with 3, and 3 the ultrasonic sensor array distributes in the different positions of cubical switchboard.
Further, the remote monitoring terminal is a portable computer used by a worker.
The invention also provides a switch cabinet partial discharge detection method based on the ultrasonic sensor array, which is applied to the switch cabinet partial discharge detection device based on the ultrasonic sensor array and comprises the following steps:
s1, acquiring partial discharge signals acquired by a plurality of ultrasonic sensor arrays and transmitting the partial discharge signals to a positioning algorithm module;
s2, the positioning algorithm module estimates the relative time difference of the local discharge sound source reaching each ultrasonic sensor array element in the ultrasonic sensor array based on a time difference estimation method of signal correlation analysis;
and S3, the positioning algorithm module calculates the distance difference of the local discharge sound source to each ultrasonic sensor array element by using the estimated relative time difference based on the direction-finding positioning principle that the plurality of ultrasonic sensor arrays are larger than or equal to each other, and then searches by using a geometric algorithm or an ant colony algorithm based on the topological structure of the ultrasonic sensor arrays to determine the position of the local discharge sound source.
Further, in step S3, the positioning algorithm module calculates a distance difference from the local discharge sound source to each ultrasonic sensor array element by using the estimated relative time difference based on the principle that the plurality of ultrasonic sensor arrays are greater than or equal to the direction-finding positioning principle, and then searches by using a geometric algorithm or an ant colony algorithm based on the topological structure of the ultrasonic sensor arrays to determine the position of the local discharge sound source, specifically including:
3 direction-finding straight lines are positioned by 3 ultrasonic sensor arrays on the switch cabinet, and then an equation of the sum of distances between one point in space and the 3 direction-finding straight lines is established;
searching based on an ant colony algorithm, and finding a point corresponding to the minimum value of the equation, namely the spatial position of the local discharge sound source.
Further, searching for a point corresponding to the minimum value of the equation based on the ant colony algorithm is the spatial position of the local discharge sound source, and specifically includes:
initializing parameters: the number of ants is set to be 1.5 times of the number of direction-finding straight lines, the ants are expressed by m, the pheromone factor is 3, the heuristic function factor is 3.5, the pheromone volatilization factor is selected to be 0.4, the pheromone constant number is selected to be 300, and the maximum iteration number is 200;
searching based on the ant colony algorithm: placing the determined m ants in a program; during the first iteration, n candidate road sets are randomly generated, and a new road set is generated by each subsequent iteration by taking the optimal path during the last iteration as a central reference;
then, for each ant, selecting a next moving position on the basis of the principle that the distance equation d between the discharge point and the three direction-finding straight lines is shortest, judging whether the ant completes a path for selecting a road, if not, returning to the step of determining a current candidate road set for each ant, and if so, selecting the optimal local discharge sound source position in m ants, namely the sum of the distances between the position and the 3 direction-finding straight lines is the minimum;
and finally, judging the iteration times, judging whether the iteration times reach 200 times, if not, returning to the step of placing m ants to continue the circulation, if so, directly quitting the circulation, and outputting the selected optimal local discharge sound source position.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: according to the device and the method for detecting the local discharge of the switch cabinet based on the ultrasonic sensor array, a split design is adopted, the ultrasonic sensor array, the power supply module, the information transmission module and the embedded positioning algorithm module can be disassembled, and the device is convenient to maintain and replace; the method can realize the on-line detection of partial discharge caused by typical defects of the switch cabinet, integrates the functions of an ultrasonic sensor array, a power supply module, an information transmission module, an embedded positioning algorithm module and the like, overcomes the defects of the traditional methods such as a transient-state ground voltage method, a pulse current method, an ultrahigh frequency method and the like, has great practicability, can adapt to complex field environment, greatly reduces the false detection condition, provides great convenience for field operation and maintenance personnel, and can greatly improve the overhaul efficiency of the switch cabinet.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an ultrasonic sensor array arranged on a switch cabinet according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a switch cabinet partial discharge detection device based on an ultrasonic sensor array according to an embodiment of the present invention;
FIG. 3 is a flowchart of a method for detecting partial discharge of a switch cabinet based on an ultrasonic sensor array according to an embodiment of the present invention;
fig. 4 is a diagram of ultrasonic frequency of partial discharge of a switchgear according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The invention aims to provide a switch cabinet partial discharge detection device and method based on an ultrasonic sensor array.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to fig. 2, the switch cabinet partial discharge detection apparatus based on an ultrasonic sensor array according to an embodiment of the present invention includes: the ultrasonic monitoring system comprises an ultrasonic sensor array, a power supply module, an information transmission module and a processor module, wherein the processor module is electrically connected with the ultrasonic sensor array, the information transmission module and the power supply module respectively, and a positioning algorithm module is embedded in the processor module;
the ultrasonic sensor array is arranged on the wall of the switch cabinet and used for collecting partial discharge signals of the switch cabinet, the positioning algorithm module is used for carrying out sound source positioning according to the signals collected by the ultrasonic sensor array, and the processor module is in communication connection with the remote monitoring terminal through the information transmission module. The remote monitoring terminal is a portable computer used by workers.
The information transmission module consists of a signal receiving module and a signal transmitting module, and has the main function of realizing the exchange of control information and data information of the switch cabinet partial discharge detection device and the portable computer.
The ultrasonic sensor array has the structural size of 4 multiplied by 4 ultrasonic sensor array elements, the central frequency of 100kHz, the frequency range of 50kHz-150kHz, and the ultrasonic sensor material is selected as piezoelectric ceramic, so that the ultrasonic sensor array has adaptability in multiple aspects. From the physical property, the material has higher hardness and can apply or bear large stress; and from the chemical property, the crystal has "inertia", and the property of the crystal is not changed by various atmospheric conditions such as humidity, and the like, which is much better than that of the common artificial single crystal. The piezoelectric ceramic is similar to insulating ceramic in preparation method, and can be made into almost any required shape and size, and its polarization direction can be freely selected. The ultrasonic sensor array is provided with 3, 3 the ultrasonic sensor array distributes in the different positions of cubical switchboard. Arranged in 3 positions on the switchgear cabinet wall as shown in fig. 1: position 1, position 2 and position 3.
The geometric shape of the ultrasonic sensor array is crucial to sound source positioning performance, and a model for time delay estimation can be divided into an ideal model and a reverberation model according to the environment where the ultrasonic sensor array is located. A model of an ultrasound transducer array element that receives only sound signals arriving at the ultrasound transducer array via a direct path is referred to as an ideal model. Such a model that considers not only signals arriving through a direct path but also signals arriving indirectly at an array after a signal emitted from a sound source encounters a reflection on a wall, a table, or the like is called a reverberation model. Because the number of the paths of the reverberation signal has uncertainty, the algorithm complexity based on the reverberation model is relatively larger than that of an ideal model, and the algorithm based on the reverberation model is used for fitting the influence of interference by a mathematical model and is not like the influence of avoiding the interference of an indirect path signal by the ideal model, so the time delay estimation effect of the algorithm based on the reverberation model is relatively good. Nevertheless, in order to reduce the complexity of the algorithm, the present invention mainly studies the time delay estimation of the ultrasound transducer array with respect to an ideal model.
After the time delay of the ultrasonic sensor array is estimated, the direction angle and the distance of the sound source can be determined according to the geometric relationship between the sound source and the array, but the positioning accuracy is influenced by a plurality of factors, wherein the main factors influencing the positioning accuracy are a time delay estimation method and a positioning method.
The switch cabinet partial discharge detection device based on the ultrasonic sensor array adopts a split design, and the ultrasonic sensor array, the power supply module, the information transmission module and the embedded positioning algorithm module can be disassembled, so that the device is convenient to maintain and replace.
As shown in fig. 3, the present invention further provides a switch cabinet partial discharge detection method based on an ultrasonic sensor array, which is applied to the switch cabinet partial discharge detection apparatus based on an ultrasonic sensor array, and includes the following steps:
s1, acquiring partial discharge signals acquired by a plurality of ultrasonic sensor arrays and transmitting the partial discharge signals to a positioning algorithm module;
s2, the positioning algorithm module estimates the relative time difference of the local discharge sound source reaching each ultrasonic sensor array element in the ultrasonic sensor array based on a time difference estimation method of signal correlation analysis;
s3, the positioning algorithm module calculates the distance difference from the local discharge sound source to each ultrasonic sensor array element by using the estimated relative time difference based on the direction finding positioning principle that a plurality of ultrasonic sensor arrays are larger than or equal to each other, and then searches by using a geometric algorithm or an ant colony algorithm in combination with the topological structure of the ultrasonic sensor arrays to determine the position of the local discharge sound source; the method specifically comprises the following steps:
3 direction-finding straight lines are positioned by 3 ultrasonic sensor arrays on the switch cabinet, and then an equation of the sum of distances between one point in space and the 3 direction-finding straight lines is established;
and searching for a point corresponding to the minimum value of the equation based on an ant colony algorithm, wherein the point is the spatial position of the local discharge sound source.
The ultrasonic array sensors at 3 positions can obtain the azimuth angle and the pitch angle of the arrival direction of the partial discharge source. When the position of the discharge source is determined by using the arrival time difference of signals received by a plurality of sensor array elements, the reading precision of the time difference directly determines the positioning precision. The time difference obtaining method adopts a time difference estimation method based on signal correlation analysis.
A partial discharge source coordinate determination method based on a direction-finding positioning principle that a plurality of sensor arrays are larger than or equal to is adopted. The method comprises the steps of carrying out multiple detections on different positions of a switch cabinet by using an ultrasonic array sensor to obtain azimuth angles and pitch angles of a plurality of direction-finding lines, establishing an equation of the sum of distances from a certain point in space to the direction-finding lines, wherein the point corresponding to the minimum value is the space position of a partial discharge source of the switch cabinet. The multi-plane direction-finding positioning principle of the local discharge of the switch cabinet fully considers the actual condition of 'non-coplanar disjunction' of direction-finding lines in actual detection and various errors, and can effectively improve the positioning precision. Meanwhile, as the partial discharge of the switch cabinet is static and stable under the common condition, the direction can be measured for many times at different positions by adopting one ultrasonic array sensor, so that the error caused by inconsistent performance of the sensor can be reduced, and the detection cost can be effectively reduced.
After an equation of the sum of the distances from a certain point in space to each direction-finding line is established, the space position of the local discharge source of the switch cabinet can be determined by searching the point corresponding to the minimum value. The optimized searching method of the positioning algorithm based on the ant colony algorithm realizes the self-adaptive control searching of a space range under the guidance of qualitative knowledge, avoids the problems that other intelligent optimization algorithms are easy to fall into local optimal solution, premature convergence and the like, and has better searching performance than traditional algorithms such as genetic algorithm and the like.
3 direction-finding straight lines are positioned by 3 ultrasonic sensors on the switch cabinet in the figure 1, and then an equation of the sum of distances between one point in space and the 3 direction-finding straight lines is established. Using the sensor at position 1 as an example, a formula for establishing a direction-finding straight line is written, knowing that the coordinates of the sensor array at position 1 are (a, b, c) and the angle of the discharge point estimated by the sensor array at position 1 is (θ) 1 ，φ 1 ) Then the ray equation is
Similarly, the position 2 sensor array can be found with respect to (x) 2 ,y 2 ,z 2 ) And position 3 sensor array with respect to (x) 3 ,y 3 ,z 3 ) The ray equation of (c). And (3) setting the space position of the discharge point as (x, y, z), then the equation of the distance between the partial discharge source and three straight lines:
this completes the first step of data pre-processing in fig. 3.
The searching for the point corresponding to the minimum value of the equation based on the ant colony algorithm is the spatial position of the local discharge sound source, and specifically includes:
initializing parameters: wherein the number of ants is 1.5 times of the number of direction-finding straight lines and is expressed by m; according to the invention, experiments show that the pheromone factor generally selects a [2,4] interval, the performance is better, and when the heuristic function factor is [3,4], the comprehensive solving performance is better, so that the pheromone factor selected herein is 3, and the heuristic function factor is 3.5; the pheromone volatilization factor is selected to be 0.4, and the pheromone constant is selected to be 300; executing a program to check the convergence track of the algorithm to determine that the maximum iteration number is 200;
searching based on the ant colony algorithm: placing the determined m ants in a program; during the first iteration, n candidate road sets are randomly generated, and a new road set is generated by each subsequent iteration by taking the optimal path during the last iteration as a central reference;
then, for each ant, selecting a next moving position on the basis of the principle that the distance equation d between the discharging point and the three direction-finding straight lines is shortest, judging whether the ant completes the path for selecting the road, if not, returning to the step of determining the current candidate road set for each ant, and if the path is completed, selecting the optimal local discharging sound source position in m ants, namely, the position is the minimum sum of the distances between the position and the 3 direction-finding straight lines;
and finally, judging the iteration times, judging whether the iteration times reach 200 times, if not, returning to the step of placing m ants to continue the circulation, if so, directly quitting the circulation, and outputting the selected optimal local discharge sound source position.
Fig. 4 is a frequency chart of the local discharge sound of the switch cabinet collected by a certain ultrasonic sensor, and it can be seen that the discharge signal amplitude is the largest when the frequency is 100kHz, so that 100kHz is selected as the central discharge frequency, and the bandwidth is selected as 100kHz, i.e., the frequency range is 50kHz to 150kHz.
The switch cabinet partial discharge detection method based on the ultrasonic sensor array can realize the on-line detection of partial discharge caused by typical defects of the switch cabinet, integrates the functions of the ultrasonic sensor array, the power supply module, the information transmission module, the embedded positioning algorithm module and the like, overcomes the defects of the traditional methods such as a transient-state ground voltage method, a pulse current method, an ultrahigh frequency method and the like, has great practicability, can adapt to complex field environment, greatly reduces the false detection condition, provides great convenience for field operation and maintenance personnel, and can greatly improve the overhaul efficiency of the switch cabinet.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (4)
1. A switch cabinet partial discharge detection device based on an ultrasonic sensor array is characterized by comprising: the ultrasonic monitoring system comprises an ultrasonic sensor array, a power supply module, an information transmission module and a processor module, wherein the processor module is electrically connected with the ultrasonic sensor array, the information transmission module and the power supply module respectively, and a positioning algorithm module is embedded in the processor module;
the ultrasonic sensor arrays are arranged on the wall of the switch cabinet and used for collecting local discharge signals of the switch cabinet, the positioning algorithm module is used for positioning a sound source according to the signals collected by the ultrasonic sensor arrays, and the processor module is in communication connection with a remote monitoring terminal through the information transmission module;
the switch cabinet partial discharge detection method based on the ultrasonic sensor array applied to the switch cabinet partial discharge detection device comprises the following steps:
s1, acquiring partial discharge signals acquired by a plurality of ultrasonic sensor arrays, and transmitting the partial discharge signals to a positioning algorithm module;
s2, the positioning algorithm module adopts a time difference estimation method based on signal correlation analysis to estimate the relative time difference of the local discharge sound source reaching each ultrasonic sensor array element in the ultrasonic sensor array;
s3, the positioning algorithm module calculates the distance difference of the local discharge sound source to each ultrasonic sensor array element by using the estimated relative time difference based on the direction-finding positioning principle that the plurality of ultrasonic sensor arrays are larger than or equal to each other, and then searches by using a geometric algorithm or an ant colony algorithm based on the topological structure of the ultrasonic sensor arrays to determine the position of the local discharge sound source;
in step S3, the positioning algorithm module calculates a distance difference from the local discharge sound source to each ultrasonic sensor array element by using the estimated relative time difference based on the direction-finding positioning principle that the plurality of ultrasonic sensor arrays are greater than or equal to, and then searches for and determines a position of the local discharge sound source by using a geometric algorithm or an ant colony algorithm based on a topological structure of the ultrasonic sensor arrays, which specifically includes:
3 direction-finding straight lines are positioned by 3 ultrasonic sensor arrays on a switch cabinet, the azimuth angle and the pitch angle of the 3 direction-finding straight lines are obtained, and then an equation of the sum of the distances between one point in space and the 3 direction-finding straight lines is established;
searching based on an ant colony algorithm, and finding a point corresponding to the minimum value of an equation, namely the spatial position of the local discharge sound source, wherein the method specifically comprises the following steps:
initializing parameters: the number of ants is set to be 1.5 times of the number of direction-finding straight lines, the ants are expressed by m, the pheromone factor is 3, the heuristic function factor is 3.5, the pheromone volatilization factor is selected to be 0.4, the pheromone constant number is selected to be 300, and the maximum iteration number is 200;
searching based on an ant colony algorithm: placing the determined m ants in a program; during the first iteration, randomly generating n candidate road sets, and generating a new road set by taking the optimal path during the last iteration as a central reference in each subsequent iteration;
then, for each ant, selecting a next moving position on the basis of the principle that the distance equation d between the discharging point and the three direction-finding straight lines is shortest, judging whether the ant completes the path for selecting the road, if not, returning to the step of determining the current candidate road set for each ant, and if the path is completed, selecting the optimal local discharging sound source position in m ants, namely, the position is the minimum sum of the distances between the position and the 3 direction-finding straight lines;
and finally, judging the iteration times, judging whether the iteration times reach 200 times, if not, returning to the step of placing m ants to continue the circulation, if so, directly quitting the circulation, and outputting the selected optimal local discharge sound source position.
2. The device for detecting the partial discharge of the switch cabinet based on the ultrasonic sensor array as claimed in claim 1, wherein the structure size of the ultrasonic sensor array is 4 x 4 ultrasonic sensor array elements, the center frequency is 100kHz, the frequency range is 50kHz-150kHz, and the ultrasonic sensor array material is piezoelectric ceramic.
3. The apparatus for detecting the partial discharge of the switch cabinet based on the ultrasonic sensor array as claimed in claim 1, wherein the ultrasonic sensor array is provided with 3, and 3 ultrasonic sensor arrays are distributed at different positions of the switch cabinet.
4. The ultrasonic sensor array-based switchgear partial discharge detection apparatus according to claim 1, wherein the remote monitoring terminal is a portable computer used by a worker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110327132.5A CN112924833B (en) | 2021-03-26 | 2021-03-26 | Switch cabinet partial discharge detection device and method based on ultrasonic sensor array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110327132.5A CN112924833B (en) | 2021-03-26 | 2021-03-26 | Switch cabinet partial discharge detection device and method based on ultrasonic sensor array |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112924833A CN112924833A (en) | 2021-06-08 |
| CN112924833B true CN112924833B (en) | 2023-04-14 |
Family
ID=76176211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110327132.5A Active CN112924833B (en) | 2021-03-26 | 2021-03-26 | Switch cabinet partial discharge detection device and method based on ultrasonic sensor array |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112924833B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023274503A1 (en) * | 2021-06-29 | 2023-01-05 | Siemens Aktiengesellschaft | Locating an arc |
| CN113758696B (en) * | 2021-09-08 | 2023-04-21 | 北京航空航天大学 | Three-dimensional stereo signal acquisition device |
| CN114626423A (en) * | 2022-05-12 | 2022-06-14 | 杭州兆华电子股份有限公司 | Partial discharge signal imaging method for improving Kmeans |
| CN117388644B (en) * | 2023-06-27 | 2024-04-16 | 国网宁夏电力有限公司电力科学研究院 | Power equipment partial discharge positioning method and system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101051099B1 (en) * | 2008-09-30 | 2011-07-21 | 한국전력공사 | Microwave partial discharge and discharge position measuring device of high voltage power equipment |
| CN104808124A (en) * | 2015-04-30 | 2015-07-29 | 国家电网公司 | Acoustic-electric combined positioning method of switch cabinet local discharge fault positions |
| CN111856224A (en) * | 2020-06-29 | 2020-10-30 | 国网河南省电力公司周口供电公司 | Partial discharge multi-source fusion detection system and method for high-voltage switch cabinet |
| CN111679166A (en) * | 2020-07-23 | 2020-09-18 | 国家电网有限公司 | Switch cabinet partial discharge fault multi-source information fusion detection early warning system and method based on wireless transmission technology |
| CN112213585A (en) * | 2020-10-10 | 2021-01-12 | 国网山东省电力公司枣庄供电公司 | High-voltage switch cabinet partial discharge positioning method and system considering temperature field change |
-
2021
- 2021-03-26 CN CN202110327132.5A patent/CN112924833B/en active Active
Non-Patent Citations (2)
| Title |
|---|
| GIS局部放电智能巡检定位技术及应用;牛勃等;《高压电器》;20200116;第56卷(第01期);188-195 * |
| 基于阵列时延库的变压器局放超声阵列定位研究;董艳唯等;《电测与仪表》;20150525;第52卷(第10期);105-118 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112924833A (en) | 2021-06-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112924833B (en) | Switch cabinet partial discharge detection device and method based on ultrasonic sensor array | |
| WO2014106414A1 (en) | Locating method of partial discharge source and locating system of partial discharge source | |
| CN109917249A (en) | A kind of shelf depreciation positioning device and method for the patrol unmanned machine of power equipment | |
| US12000906B2 (en) | System and method for measuring transformer hot-spot temperature | |
| CN105093070A (en) | Method for ultrasonically positioning multiple discharging sources in large transformer | |
| WO2018121438A1 (en) | Method for recognizing line-of-sight path, and wireless device | |
| Wang et al. | Research on APIT and Monte Carlo method of localization algorithm for wireless sensor networks | |
| Alippi et al. | A RF map-based localization algorithm for indoor environments | |
| He et al. | Online partial discharge detection and location system using wireless sensor network | |
| CN108680832B (en) | Partial discharge positioning method based on SA-APSO and dimension reduction projection dynamic contraction circle | |
| CN110095755B (en) | Sound source positioning method | |
| Liu et al. | A real-time algorithm for fingerprint localization based on clustering and spatial diversity | |
| Paulino et al. | Design and experimental evaluation of a bluetooth 5.1 antenna array for angle-of-arrival estimation | |
| Polak et al. | Location of partial discharges sources using sensor arrays | |
| Chai et al. | Comparative study of partial discharge localization based on UHF detection methods | |
| CN102612137A (en) | Post-disaster search and rescue terminal positioning method and life detecting device | |
| CN111239560B (en) | Multi-sensor-based partial discharge positioning method | |
| CN117110725A (en) | Method and system for evaluating pulse electromagnetic field | |
| Wielandt et al. | Evaluation of angle of arrival estimation for localization in multiple indoor environments | |
| CN207741809U (en) | Multichannel ultrasonic open-channel meter | |
| CN104880651A (en) | Transformer internal partial discharge determination device and positioning method thereof | |
| CN110297212A (en) | Outdoor grouping test position fix method and system based on Voronoi diagram | |
| CN210376725U (en) | Multi-sensing fusion life detection positioning system | |
| CN114355097A (en) | Fault positioning method and device for comprehensive energy distribution network | |
| CN113567822A (en) | Monitoring device for partial discharge of electrical equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |