CN117929947A - Flashover detection method and device, electronic equipment and storage medium - Google Patents
Flashover detection method and device, electronic equipment and storage medium Download PDFInfo
- Publication number
- CN117929947A CN117929947A CN202410095793.3A CN202410095793A CN117929947A CN 117929947 A CN117929947 A CN 117929947A CN 202410095793 A CN202410095793 A CN 202410095793A CN 117929947 A CN117929947 A CN 117929947A
- Authority
- CN
- China
- Prior art keywords
- flashover
- voltage
- target
- insulator
- detection model
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 127
- 239000012212 insulator Substances 0.000 claims abstract description 188
- 238000011161 development Methods 0.000 claims abstract description 124
- 238000000034 method Methods 0.000 claims abstract description 84
- 238000012545 processing Methods 0.000 claims abstract description 53
- 230000008569 process Effects 0.000 claims description 56
- 238000004590 computer program Methods 0.000 claims description 16
- 238000012937 correction Methods 0.000 claims description 13
- 230000015556 catabolic process Effects 0.000 claims description 12
- 230000000630 rising effect Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 description 21
- 238000012360 testing method Methods 0.000 description 10
- 238000004891 communication Methods 0.000 description 8
- 238000004364 calculation method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000009863 impact test Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 229910052573 porcelain Inorganic materials 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 238000004401 flow injection analysis Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 208000025274 Lightning injury Diseases 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000010801 machine learning Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012821 model calculation Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a flashover detection method, a flashover detection device, electronic equipment and a storage medium. The method comprises the following steps: acquiring at least two frames of images to be used, including a target insulator chain; determining the lead development length of the target insulator string according to the images to be used, and processing the images to be used of two adjacent frames to obtain the lead development speed; processing the lead development length, the lead development speed and the string length of the target insulator string based on the first flashover detection model to obtain a to-be-repaired voltage corresponding to the target insulator string; correcting the voltage to be corrected based on the second flashover detection model to obtain a target voltage; and determining whether the target insulator string is flashover or not based on the target voltage and a preset threshold. The problem that flashover cannot be accurately detected in the prior art is solved, the accuracy of flashover detection is improved, and the effect of ensuring safe and stable operation of the system is achieved.
Description
Technical Field
The present invention relates to the field of power transmission lines, and in particular, to a flashover detection method, apparatus, electronic device, and storage medium.
Background
Insulators are an important device in a power system, have the functions of insulation and support, and are widely applied to power transmission lines. When the insulator is subjected to rainy days, heavy fog days, snow melting days and other days, pollutants on the surface of the insulator are dissolved in water to form a conductive film on the surface of the insulator, so that the insulating function of the insulator is greatly reduced, and the insulator can be flashover, or when the insulator is subjected to lightning impulse, the insulator can be flashover. The insulator is damaged if the insulator is in a light flashover state, the insulating capability of the insulator is reduced, and large-scale power failure can be caused when the insulator is severe, so that the normal operation of a power system is influenced, and therefore, whether the insulator is in a flashover state or not needs to be detected.
At present, the mode of judging whether flashover occurs is usually to adopt an image recognition technology to recognize the development process of a lead, judge whether flashover occurs through the length of the lead, or judge whether flashover occurs by using geometric features obtained after image processing, but the problem of lower flashover detection accuracy exists due to the complexity of the flashover phenomenon.
Disclosure of Invention
The invention provides a flashover detection method, a flashover detection device, electronic equipment and a storage medium, which are used for improving the flashover detection accuracy, improving the safety of a power grid and achieving the technical effect of ensuring the safe and stable operation of a system.
According to an aspect of the present invention, there is provided a flashover detection method comprising:
Acquiring at least two frames of images to be used, including a target insulator chain;
determining the lead development length of the target insulator string according to the images to be used, and processing two adjacent frames of images to be used to obtain the lead development speed;
Processing the lead development length, the lead development speed and the string length of the target insulator string based on a first flashover detection model to obtain a to-be-corrected voltage corresponding to the target insulator string;
Correcting the to-be-corrected voltage based on a second flashover detection model to obtain a target voltage;
and determining whether the target insulator string is flashover or not based on the target voltage and a preset threshold value.
According to another aspect of the present invention, there is provided a flashover detection apparatus comprising:
The image acquisition module is used for acquiring at least two frames of images to be used, including a target insulator chain;
The image processing module is used for determining the leading development length of the target insulator string according to the images to be used, and processing the images to be used of two adjacent frames to obtain the leading development speed;
The to-be-repaired positive voltage determining module is used for processing the lead development length, the lead development speed and the string length of the target insulator string based on a first flashover detection model to obtain to-be-repaired voltage corresponding to the target insulator string;
The voltage correction module is used for correcting the voltage to be corrected based on a second flashover detection model to obtain a target voltage;
And the flashover judging module is used for determining whether the target insulator string is flashover or not based on the target voltage and a preset threshold value.
According to another aspect of the present invention, there is provided an electronic apparatus including:
At least one processor; and
A memory communicatively coupled to the at least one processor; wherein,
The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the flashover detection method according to any one of the embodiments of the present invention.
According to another aspect of the present invention, there is provided a computer readable storage medium storing computer instructions for causing a processor to execute a flashover detection method according to any of the embodiments of the present invention.
According to the technical scheme, at least two frames of images to be used including the target insulator chain are acquired; determining the lead development length of the target insulator string according to the images to be used, and processing the images to be used of two adjacent frames to obtain the lead development speed; processing the lead development length, the lead development speed and the string length of the target insulator string based on the first flashover detection model to obtain a to-be-repaired voltage corresponding to the target insulator string; correcting the voltage to be corrected based on the second flashover detection model to obtain a target voltage; whether the flashover occurs to the target insulator string is determined based on the target voltage and a preset threshold value, the problem that the flashover cannot be accurately detected in the prior art is solved, the fact that the actual flashover process on the insulator is reflected more accurately through the multiple frames of images to be used by acquiring the multiple frames of images to be used capable of reflecting the flashover development process of the target insulator string is achieved, the calculation accuracy is improved, the lead development length is further identified, the lead development speed is determined through the images to be used in the front frame and the rear frame. Further, the first flashover detection model obtained under the impact test of the electric transmission line insulator string under different conditions is used for processing the lead development length, the lead development speed and the string length of the target insulator string to obtain a to-be-corrected voltage corresponding to the target insulator string, so that the universality of flashover detection is improved. Meanwhile, the voltage to be corrected is corrected through the second flashover detection model, so that the target voltage is obtained, whether flashover occurs to the target insulator string is determined based on the target voltage and a preset threshold value, the flashover detection accuracy is improved, and the technical effect of ensuring safe and stable operation of the system is achieved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a flashover detection method according to a first embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a flashover detection device according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of an electronic device implementing a flashover detection method according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Before the present technical solution is introduced, an application scenario may be illustrated. The technical scheme provided by the invention can be applied to any scene needing to detect flashover, for example, in a power transmission line scene, an insulator string can be hung on a wire to insulate the wire from a pole tower and the ground, when the ground wire or the pole tower is struck by lightning, a certain voltage waveform can appear between the wire and the ground, at this time, the flashover characteristics of the insulator can be needed to judge whether flashover occurs, when flashover occurs and how flashover probability is, and at this time, flashover detection can be performed based on the technical scheme provided by the invention.
Example 1
Fig. 1 is a flowchart of a flashover detection method according to a first embodiment of the present invention, where the method may be performed by a flashover detection device, which may be implemented in hardware and/or software, and the flashover detection device may be configured in a computing device. As shown in fig. 1, the method includes:
s110, acquiring at least two frames of images to be used, including a target insulator chain.
Wherein two or more insulator elements may be included in the target insulator string.
In this embodiment, flashover detection may be performed in real time or periodically; the flashover detection may also be performed when a flashover detection condition is triggered, for example, but not limited to, the flashover detection condition includes, but is not limited to, that the outside of the insulator string is triggered by high voltage, that the surface of the insulator string is discharged, that the local temperature of the surface is too high, that the cable is faulty, that a bad phenomenon occurs, and the like. Alternatively, a voltage detector may be provided to detect flashover when the presence or voltage surge is detected. When flashover detection is carried out, the camera equipment can be triggered to start, the flashover process image of the multi-frame target insulator string under the impact voltage is collected through the camera equipment, and the flashover process image is used as an image to be used. The images to be used of the continuous multiframe can reflect the flashover development process of the insulator string, so that the voltages at two ends of the insulator can be calculated through the flashover development condition in the images to be used. The image pickup apparatus may be a CCD (Charge-coupled Device) high-speed camera.
In order to improve the accuracy of flashover detection, after the image to be used is obtained, the image to be used can be preprocessed, so that the preprocessed image to be used is obtained, and the image quality is improved. Optionally, the preprocessing mode includes, but is not limited to, transformation processing (for example, converting the processing of the spatial domain into the processing of the transform domain, which not only reduces the amount of computation, but also improves the image processing effect), denoising processing (for example, removing noise and improving the definition of the image), enhancement processing (for example, enhancing the high-frequency component of the image and making the outline of the object in the image clear), and the like.
S120, determining the lead development length of the target insulator string according to the images to be used, and processing the images to be used of two adjacent frames to obtain the lead development speed.
In this embodiment, the whole pilot development process may be recorded by a high-speed camera, and the insulator flashover pilot development length is measured according to the image to be used in the target insulator string flashover process. And measuring the pilot length in the images to be used of the front and rear continuous frames to obtain the pilot development speed.
S130, processing the lead development length, the lead development speed and the string length of the target insulator string based on the first flashover detection model to obtain a to-be-corrected voltage corresponding to the target insulator string.
The first flashover detection model is obtained under the impact test of the insulator string of the power transmission line under different test conditions, the parameters of the first flashover detection model are determined by fitting through an impact flashover characteristic test method, and the tested insulator string comprises a plurality of types, such as composite, glass and porcelain, so that the universality of flashover detection is improved.
Specifically, the lead development length, the lead development speed and the string length of the target insulator string may be input as input features to the first flashover detection model, and the voltage across the target insulator string may be obtained through model calculation, and may be used as the voltage to be corrected. Alternatively, the first flashover detection model may be expressed asV L denotes the lead development speed, k 0 is a fitting parameter, E 0 is a constant related to the insulator flashover process, d denotes the string length of the insulator string, x denotes the lead development length, and U (t) denotes the voltage to be repaired.
It should be noted that the whole flashover development process is continuous, and accordingly, the determined voltages to be repaired are also continuous, and each voltage to be repaired can be subsequently corrected to obtain continuous target voltage so as to judge whether flashover occurs or not based on the target voltage.
And S140, correcting the voltage to be corrected based on the second flashover detection model to obtain the target voltage.
In this embodiment, before correcting the voltage to be corrected based on the second flashover detection model to obtain the target voltage, the method further includes: and correcting the voltage to be corrected based on a weather correction method, and updating the voltage to be corrected.
Specifically, the voltage to be corrected may be corrected by using a weather correction method, so as to obtain a corrected voltage to be corrected, for example, the voltage to be corrected is corrected by considering atmospheric condition information (such as parameters of temperature, pressure, humidity, cloud, illumination, scattering, and the like). And the voltage integration method can also be used as an insulator flashover criterion to correct the voltage to be corrected so as to obtain the corrected voltage to be corrected. In the process of processing the voltage to be corrected, the voltage-second characteristic curve of the insulator string can be calculated in a sectionalized mode by combining a numerical analysis method, and each voltage to be corrected is corrected to continuously correct.
In this embodiment, correcting the voltage to be corrected based on the second flashover detection model to obtain the target voltage includes: determining the rising time when the voltage rises to the corona starting voltage and the breakdown time of the gap breakdown; and processing the rising time, the breakdown time and the voltage to be corrected according to the second flashover detection model to obtain the target voltage.
Specifically, the rise time of the voltage to the corona onset voltage and the breakdown time of the gap breakdown can be determined in the process of flashover detection. Further, the rising time, the breakdown time and the to-be-corrected voltage are input into a second flashover detection model, and the target voltage is obtained. Illustratively, the second flashover detection model may be expressed as: Wherein DE is the flashover voltage, i.e., the target voltage; u (t) is the voltage to be corrected, K 1、K2 is constant, t 0 corresponds to the time when the voltage rises to the corona onset voltage, and t p is the time of gap breakdown.
And S150, determining whether the target insulator string is flashover or not based on the target voltage and a preset threshold value.
In practical application, the target voltage and the preset threshold value can be compared, and whether the flashover occurs in the target insulator string or not is determined based on a comparison result. Optionally, determining whether the target insulator string is flashover based on the target voltage and a preset threshold includes: and if the target voltage exceeds the preset normal range, determining that the target insulator string is flashover.
Specifically, if the target voltage is not within the preset normal range, the target insulator string can be considered to have flashover; if the target voltage is within the preset normal range, the target insulator string can be considered to be free from flashover, and flashover detection of the target insulator string is realized so as to perform subsequent maintenance operation when flashover occurs.
In this embodiment, when determining that the flashover occurs in the target insulator string, the method includes: processing the target voltage and the string length of the target insulator string according to the third flashover detection model, and determining the streamer development time of the flashover of the target insulator string; and determining the pilot development duration of the flashover of the target insulator string based on the pilot development length and the pilot development speed.
In practical applications, the target voltage and the string length of the target insulator string may be input to a third flashover detection model, which may be expressed asT s is the development time of the insulator flashover current. And processing the pilot development length and the pilot development speed, wherein the obtained quotient can be used as the pilot development time of the flashover of the target insulator string. The flashover is further analyzed through the pilot development time of the flashover and the stream development time, and a maintenance basis is provided.
In this embodiment, the first flashover detection model may also be constructed in advance. Constructing a first flashover detection model, comprising: applying standard lightning waves and short wake waves to insulators to be tested on different altitudes, respectively obtaining voltage parameters at two ends of the insulators to be tested and development time of insulator flashover flow, and obtaining process images of the insulator flashover process to be tested; determining the development length of the insulator to be tested to be used according to the process images, and processing two adjacent frames of process images to obtain the development speed of the insulator to be tested to be used; and fitting model parameters in the first flashover detection model based on the voltage parameters, the length of development to be used, the speed of development to be used and the length of the insulator to be tested, and updating the first flashover detection model. Further, the second flashover detection model may be updated by fitting model parameters in the second flashover detection model based on the voltage parameters, the length of the insulator to be tested, and the development time.
Wherein the different altitudes may be divided into a high altitude and a low altitude. Accordingly, impact flashover characteristic tests for short wake waves and standard waves of different types (for example, composite, glass and porcelain) of insulator strings can be respectively carried out at a high-altitude area test base and a low-altitude area test base, and a CCD high-speed camera is utilized to shoot the flashover development process of the insulator strings so as to determine a first flashover detection model and a second flashover detection model.
In this embodiment, the impact flashover characteristic test method for short wake and standard wave of an insulator string at a test base in a high altitude area includes: setting up a lightning short wake test loop of a power transmission line insulator string, setting a voltage waveform on a tower insulator as a short wake when lightning hits the top of a power transmission line tower, wherein the wave head time of the lightning short wake is 0.3 mu s, and the wave tail time of the short wake is 3 mu s; applying standard short wake wave and standard wave to a 110-500 kV transmission line tower insulator, respectively measuring and recording voltage parameters at two ends of the insulator and development time of insulator flashover flow, and acquiring a process image of the insulator flashover process by using a CCD high-speed camera; according to the process image of the insulator flashover process, measuring to obtain the insulator flashover leading development length, processing the continuous flashover process images to obtain the leading development speed, and passing through the formula (1)And formula (2)/>Wherein U (T) is a voltage parameter at two ends of the insulator, T s is the development time of the flashover current of the insulator, v L represents the development speed of the guide, d represents the length of the insulator, and x represents the development length of the guide. The constants E 0 related to the insulator flashover process and the fitting parameters k 0、k1、k2 are obtained by fitting respectively. Further, according to a constant E 0 related to the flashover process of the insulator and a fitting parameter k 0、k1、k2, determining a first flashover detection model and a second flashover detection model, judging whether flashover occurs to the insulator when lightning strikes the transmission line tower through the first flashover detection model, and determining flashover flow injection development time and flashover lead development time when flashover occurs through the second flashover detection model.
In this embodiment, the impact flashover characteristic test method for short wake and standard wave of an insulator string at a test base in a low altitude area includes: setting up a lightning short wake test loop of a power transmission line insulator string, setting a voltage waveform on a tower insulator as a short wake when lightning hits the top of a power transmission line tower, wherein the wave head time of the lightning short wake is 0.6 mu s, and the wave tail time of the short wake is 5 mu s; applying standard short wake wave and standard wave to a 110-500 kV transmission line tower insulator, respectively measuring and recording voltage parameters at two ends of the insulator and development time of insulator flashover flow, and acquiring a process image of the insulator flashover process by using a CCD high-speed camera; according to the process image of the insulator flashover process, measuring to obtain the insulator flashover leading development length, processing the continuous flashover process images to obtain the leading development speed, and passing through the formula (1)And formula (2)/>Wherein U (T) is a voltage parameter at two ends of the insulator, T s is the development time of the flashover current of the insulator, v L represents the development speed of the guide, d represents the length of the insulator, and x represents the development length of the guide. The constants E 0 related to the insulator flashover process and the fitting parameters k 0、k1、k2 are obtained by fitting respectively. Further, according to a constant E 0 related to the flashover process of the insulator and a fitting parameter k 0、k1、k2, determining a first flashover detection model and a second flashover detection model, judging whether flashover occurs to the insulator when lightning strikes the transmission line tower through the first flashover detection model, and determining flashover flow injection development time and flashover lead development time when flashover occurs through the second flashover detection model.
Based on the technical scheme, the impact flashover characteristics of insulator strings with different altitudes under the same conditions can be compared, and a final first flashover detection model and a final second flashover detection model are determined based on a meteorological correction method of the impact flashover discharge voltage of the insulator strings. Further, based on test data and mechanism analysis, a third flashover detection model is determined based on a flashover model correction calculation method under insulator standard wave and short wake impact, and the method can be as follows: the first flashover detection model is adjusted and improved to be more accurate and reliable, and a third flashover detection model is obtained
The test has the advantages that the impact flashover characteristics and criteria of the insulator strings of the power transmission line under different conditions are researched, so that the study of protective measures can be carried out, the flashover development process of the insulator strings is acquired according to the images of the insulator flashover process, the actual flashover process on the insulator can be reflected more accurately, the simulation calculation precision of key links in the lightning stroke process of an electric power system is improved, the calculation and evaluation precision of the lightning protection performance of the power transmission line can be effectively improved, the guiding effect of the lightning protection calculation on the lightning protection design and the lightning protection measure application of the power transmission line is further improved, the effectiveness and pertinence of the lightning protection design and transformation are effectively improved, the cost of the safe power transmission line is reduced, and the flashover detection accuracy is further improved. Meanwhile, the technical scheme provided by the embodiment is suitable for various lightning protection measures and lightning protection designs, the lightning protection performance of the power transmission line is effectively improved, the lightning strike fault rate of equipment is reduced, the safe and stable level of a power grid is improved, the working reliability of the power transmission line is guaranteed, the method is simultaneously suitable for short wake impact and standard wave impact, simultaneously suitable for a short wake impact test of a line insulator of 110-500 kV, simultaneously suitable for insulators of different materials (composite, glass and porcelain), and therefore has good universality.
According to the technical scheme, at least two frames of images to be used including the target insulator chain are acquired; determining the lead development length of the target insulator string according to the images to be used, and processing the images to be used of two adjacent frames to obtain the lead development speed; processing the lead development length, the lead development speed and the string length of the target insulator string based on the first flashover detection model to obtain a to-be-repaired voltage corresponding to the target insulator string; correcting the voltage to be corrected based on the second flashover detection model to obtain a target voltage; whether the flashover occurs to the target insulator string is determined based on the target voltage and a preset threshold value, the problem that the flashover cannot be accurately detected in the prior art is solved, the fact that the actual flashover process on the insulator is reflected more accurately through the multiple frames of images to be used by acquiring the multiple frames of images to be used capable of reflecting the flashover development process of the target insulator string is achieved, the calculation accuracy is improved, the lead development length is further identified, the lead development speed is determined through the images to be used in the front frame and the rear frame. Further, the first flashover detection model obtained under the impact test of the electric transmission line insulator string under different conditions is used for processing the lead development length, the lead development speed and the string length of the target insulator string to obtain a to-be-corrected voltage corresponding to the target insulator string, so that the universality of flashover detection is improved. Meanwhile, the voltage to be corrected is corrected through the second flashover detection model, so that the target voltage is obtained, whether flashover occurs to the target insulator string is determined based on the target voltage and a preset threshold value, the flashover detection accuracy is improved, and the technical effect of ensuring safe and stable operation of the system is achieved.
Example two
Fig. 2 is a schematic structural diagram of a flashover detection device according to a second embodiment of the present invention. As shown in fig. 2, the apparatus includes: an image acquisition module 210, an image processing module 220, a to-be-corrected voltage determination module 230, a voltage correction module 240, and a flashover determination module 250.
The image obtaining module 210 is configured to obtain at least two frames of images to be used including a target insulator string;
the image processing module 220 is configured to determine a lead development length of the target insulator string according to the image to be used, and process two adjacent frames of images to be used to obtain a lead development speed;
The to-be-repaired voltage determining module 230 is configured to process the lead development length, the lead development speed, and the string length of the target insulator string based on a first flashover detection model, so as to obtain a to-be-repaired voltage corresponding to the target insulator string;
The voltage correction module 240 is configured to correct the voltage to be corrected based on a second flashover detection model, so as to obtain a target voltage;
the flashover judging module 250 is configured to determine whether the target insulator string is flashover based on the target voltage and a preset threshold.
According to the technical scheme, at least two frames of images to be used, including a target insulator chain, are acquired; determining the lead development length of the target insulator string according to the images to be used, and processing the images to be used of two adjacent frames to obtain the lead development speed; processing the lead development length, the lead development speed and the string length of the target insulator string based on the first flashover detection model to obtain a to-be-repaired voltage corresponding to the target insulator string; correcting the voltage to be corrected based on the second flashover detection model to obtain a target voltage; whether the flashover occurs to the target insulator string is determined based on the target voltage and a preset threshold value, the problem that the flashover cannot be accurately detected in the prior art is solved, the fact that the actual flashover process on the insulator is reflected more accurately through the multiple frames of images to be used by acquiring the multiple frames of images to be used capable of reflecting the flashover development process of the target insulator string is achieved, the calculation accuracy is improved, the lead development length is further identified, the lead development speed is determined through the images to be used in the front frame and the rear frame. Further, the first flashover detection model obtained under the impact test of the electric transmission line insulator string under different conditions is used for processing the lead development length, the lead development speed and the string length of the target insulator string to obtain a to-be-corrected voltage corresponding to the target insulator string, so that the universality of flashover detection is improved. Meanwhile, the voltage to be corrected is corrected through the second flashover detection model, so that the target voltage is obtained, whether flashover occurs to the target insulator string is determined based on the target voltage and a preset threshold value, the flashover detection accuracy is improved, and the technical effect of ensuring safe and stable operation of the system is achieved.
On the basis of the device, the device also comprises a voltage correction module, wherein the voltage correction module is used for correcting the to-be-corrected voltage based on a weather correction method and updating the to-be-corrected voltage.
On the basis of the above-described apparatus, the voltage correction module 240 may optionally include a time determining unit and a target voltage determining unit.
A time determining unit for determining a rising time when the voltage rises to the corona start voltage and a breakdown time when the gap breaks down;
And the target voltage determining unit is used for processing the rising time, the breakdown time and the to-be-corrected voltage according to the second flashover detection model to obtain the target voltage.
Based on the above device, optionally, the flashover judging module 250 is specifically configured to determine that the flashover occurs in the target insulator string if the target voltage exceeds a preset normal range.
On the basis of the device, the device optionally further comprises a flashover analysis module, wherein the flashover analysis module comprises a flow development duration determination unit and a pilot development duration determination unit.
The streamer development time length determining unit is used for processing the target voltage and the string length of the target insulator string according to a third flashover detection model and determining the streamer development time length of the flashover of the target insulator string;
And the pilot development duration determining unit is used for determining the pilot development duration of the flashover of the target insulator string based on the pilot development length and the pilot development speed.
On the basis of the above device, optionally, the device further includes a first flashover detection model building module, where the first flashover detection model building module includes: a process image determining unit, a process image processing unit and a first flashover detection model determining unit.
The process image determining unit is used for applying standard lightning waves and short wake waves to the insulator to be tested on different altitudes, respectively obtaining voltage parameters at two ends of the insulator to be tested and development time of insulator flashover flow, and obtaining a process image of the insulator flashover process to be tested;
the process image processing unit is used for determining the development length of the insulator to be tested to be used according to the process images, and processing two adjacent frames of process images to obtain the development speed of the insulator to be tested to be used;
the first flashover detection model determining unit is used for fitting model parameters in the first flashover detection model based on the voltage parameters, the to-be-used pilot development length, the to-be-used pilot development speed and the to-be-tested insulator length, and updating the first flashover detection model.
On the basis of the device, optionally, the device further comprises a second flashover detection model determining module, which is used for fitting model parameters in the second flashover detection model based on the voltage parameters, the length of the insulator to be tested and the development time, and updating the second flashover detection model.
The flashover detection device provided by the embodiment of the invention can execute the flashover detection method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Example III
Fig. 3 is a schematic structural diagram of an electronic device implementing a flashover detection method according to an embodiment of the present invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 3, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
Various components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the various methods and processes described above, such as a flashover detection method.
In some embodiments, the flashover detection method may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more of the steps of the flashover detection method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the flashover detection method in any other suitable way (e.g. by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A flashover detection method, comprising:
Acquiring at least two frames of images to be used, including a target insulator chain;
determining the lead development length of the target insulator string according to the images to be used, and processing two adjacent frames of images to be used to obtain the lead development speed;
Processing the lead development length, the lead development speed and the string length of the target insulator string based on a first flashover detection model to obtain a to-be-corrected voltage corresponding to the target insulator string;
Correcting the to-be-corrected voltage based on a second flashover detection model to obtain a target voltage;
and determining whether the target insulator string is flashover or not based on the target voltage and a preset threshold value.
2. The method of claim 1, further comprising, prior to modifying the voltage to be modified based on the second flashover detection model to obtain a target voltage:
And correcting the to-be-corrected voltage based on a weather correction method, and updating the to-be-corrected voltage.
3. The method of claim 1, wherein the correcting the voltage to be corrected based on the second flashover detection model to obtain the target voltage comprises:
Determining the rising time when the voltage rises to the corona starting voltage and the breakdown time of the gap breakdown;
And processing the rising time, the breakdown time and the voltage to be corrected according to the second flashover detection model to obtain the target voltage.
4. The method of claim 1, wherein the determining whether the target insulator string has a flashover based on the target voltage and a preset threshold comprises:
And if the target voltage exceeds a preset normal range, determining that the target insulator string is flashover.
5. The method of claim 4, wherein upon said determining that a flashover of said target insulator string occurs, comprising:
Processing the target voltage and the string length of the target insulator string according to a third flashover detection model, and determining the streamer development time of the flashover of the target insulator string;
And determining the pilot development duration of the flashover of the target insulator string based on the pilot development length and the pilot development speed.
6. The method of claim 1, wherein constructing the first flashover detection model comprises:
applying standard lightning waves and short wake waves to insulators to be tested on different altitudes, respectively obtaining voltage parameters at two ends of the insulators to be tested and development time of insulator flashover flow, and obtaining process images of the insulator flashover process to be tested;
determining the development length of the insulator to be tested to be used according to the process images, and processing two adjacent frames of process images to obtain the development speed of the insulator to be tested to be used;
And fitting model parameters in the first flashover detection model based on the voltage parameters, the to-be-used lead development length, the to-be-used lead development speed and the to-be-tested insulator length, and updating the first flashover detection model.
7. The method as recited in claim 6, further comprising:
And fitting model parameters in the second flashover detection model based on the voltage parameters, the length of the insulator to be tested and the development time, and updating the second flashover detection model.
8. A flashover detection apparatus, comprising:
The image acquisition module is used for acquiring at least two frames of images to be used, including a target insulator chain;
The image processing module is used for determining the leading development length of the target insulator string according to the images to be used, and processing the images to be used of two adjacent frames to obtain the leading development speed;
The to-be-repaired positive voltage determining module is used for processing the lead development length, the lead development speed and the string length of the target insulator string based on a first flashover detection model to obtain to-be-repaired voltage corresponding to the target insulator string;
The voltage correction module is used for correcting the voltage to be corrected based on a second flashover detection model to obtain a target voltage;
And the flashover judging module is used for determining whether the target insulator string is flashover or not based on the target voltage and a preset threshold value.
9. An electronic device, the electronic device comprising:
At least one processor; and
A memory communicatively coupled to the at least one processor; wherein,
The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the flashover detection method according to any one of claims 1-7.
10. A computer readable storage medium, characterized in that the computer readable storage medium stores computer instructions for causing a processor to implement the flashover detection method according to any of claims 1-7 when executed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410095793.3A CN117929947A (en) | 2024-01-23 | 2024-01-23 | Flashover detection method and device, electronic equipment and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410095793.3A CN117929947A (en) | 2024-01-23 | 2024-01-23 | Flashover detection method and device, electronic equipment and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117929947A true CN117929947A (en) | 2024-04-26 |
Family
ID=90769771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410095793.3A Pending CN117929947A (en) | 2024-01-23 | 2024-01-23 | Flashover detection method and device, electronic equipment and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117929947A (en) |
-
2024
- 2024-01-23 CN CN202410095793.3A patent/CN117929947A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN116124903B (en) | Defect early warning method, device, system, equipment and medium for insulator | |
| CN113011345B (en) | Image quality detection method, image quality detection device, electronic equipment and readable storage medium | |
| CN117929947A (en) | Flashover detection method and device, electronic equipment and storage medium | |
| CN116794436A (en) | Lightning arrester degradation alarm method, device, electronic equipment, system and medium | |
| CN114818830A (en) | Map-based discharge type identification method, device, equipment and medium | |
| JP2009216587A (en) | Transmission line failure location indicating method, apparatus and program | |
| CN114636883A (en) | Alternating current based power system fault determination method and device and storage medium | |
| CN117422242A (en) | Cable inspection plan generation method, device, equipment and storage medium | |
| CN114814372A (en) | Tower detection method, device, equipment and storage medium | |
| CN114614458B (en) | Lightning invasion wave overvoltage calculation method considering electrical distance between lightning arrester and equipment | |
| CN116151034B (en) | Insulator core rod crisping prediction method, device, equipment and medium | |
| CN117872068B (en) | Method and system for identifying serious discharge defects in oil immersed equipment | |
| Wu et al. | Arc feature extraction and flashover warning of direct current composite insulator based on image processing using visible discharge images | |
| CN117354859B (en) | Mobile terminal communication quality detection and early warning system based on Internet of things | |
| CN118097144A (en) | Model training and point cloud segmentation method and device and electronic equipment | |
| CN114910739A (en) | Lightning stroke detection method, device, equipment and storage medium | |
| CN116466172A (en) | Zinc oxide lightning arrester aging state evaluation method, device, equipment and storage medium | |
| CN109738686B (en) | Method and device for quickly judging transient overvoltage of power system | |
| CN116930699A (en) | Bypass live overhaul method, overhaul system, electronic equipment and storage medium | |
| Pi et al. | Deep-Learning-Based Thickness Detection Method of Ice Covering | |
| CN116679167A (en) | Partial discharge positioning method, equipment and storage medium for cable | |
| CN117194917A (en) | Fan lightning conductor fault detection method, device and equipment based on improved time-frequency domain reflection method and readable storage medium | |
| CN117218386A (en) | Distribution line image processing method and device, electronic equipment and storage medium | |
| CN117872068A (en) | Method and system for identifying serious discharge defects in oil immersed equipment | |
| CN114660413A (en) | Method and device for detecting defects of conducting wire of power transmission line |
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 |