CN102928757B - Insulator arc-over fault positioning device and positioning method based on discharging light detection - Google Patents

Abstract

The invention discloses an insulator flashover fault location device and method based on discharge light detection. Sending module, image receiving unit and alarm unit; the micro-power pinhole camera is used to collect the flashover discharge light of the insulator; the image processing single-chip microcomputer is used to control the acquisition parameters of the micro-power pinhole camera and analyze and judge whether the insulator flashover occurs according to the collection results Discharge; the counting unit is used to count the number of flashovers, and the wireless sending module sends flashover pictures to the image receiving unit; solar cells and battery packs are used as power supply devices; the image receiving unit is used to receive and store the flashover pictures sent by the wireless sending module , the alarm unit is used to send an alarm signal; the invention can intuitively and efficiently locate flashover fault insulators, improve the work efficiency of line patrol personnel, and shorten the time for fault elimination.

Description

Insulator flashover fault location device and location method based on discharge light detection

technical field

The invention relates to an insulator flashover fault location device and a location method.

Background technique

In the existing high-voltage transmission system, the insulator is an essential part. It isolates the high voltage from the ground and mechanically stretches the transmission line, which plays a role in supporting the transmission line and preventing the current from returning to the ground. Along the transmission line, there are a large number of insulators, many types, and a wide distribution. Flashover grounding faults such as pollution flashover, wet flashover, and ice flashover of insulators often occur. Once an insulator flashover occurs, the circuit breaker will open to cut off the flashover current, and then reclose. If reclosing is unsuccessful, it is necessary to quickly locate the faulty insulator and deal with it in time to ensure reliable power supply. Manual line inspection can locate flashover insulators, but the large number of insulators, wide distribution area, and long outage time make it difficult to find fault points. The labor intensity of line-finding engineers and technicians is high, and it is difficult to quickly locate them. Therefore, it is necessary to invent a kind of instrument and equipment to reduce the on-site workload of fault inspection, improve work efficiency, accurately and timely find fault points, reduce misjudgment of tripping caused by insulator string flashover, and shorten the time for fault elimination.

Patent CN88211694.0 (Insulator string flashover color indicator) discloses a color indicator device for insulator string flashover during high-voltage power transmission line operation, which can accurately reflect the location of the flashover fault point, and can display color signs, so Inspection personnel can observe on the ground or on a helicopter, thereby reducing the on-site workload of fault inspection, improving work efficiency, and accurately and timely finding fault points. Patent CN02230975.6 (high-voltage transmission line insulator flashover indicator) uses a short-circuit current sensor to trigger the indicator unit of the pressure injection device through the insulator flashover signal, and the ribbon is ejected out of the cavity and hung under the indicator, and the staff There is no need to climb the pole, and the flashover fault point can be confirmed on the ground according to the sprayed ribbon, which reduces the power failure loss and improves the reliability of the high-voltage transmission line operation. Patent 201020242577 (magnetic induction insulator flashover fault indicator) uses magnetic induction ring, alarm weight, etc. to make flashover current let the fault indicator spray out the ribbon for marking and hang it under the indicator. The flashover fault point can be confirmed according to the ejected ribbon, which can solve the problem of fault finding in the power system line and provide a powerful means to improve work efficiency and reduce the labor intensity of the staff. However, the insulator has multiple flashover faults , the ribbon/color indicating device cannot indicate the number of repeated flashovers.

Patent 201020170112 (insulator flashover grounding warning voltage equalizing ring) uses a fusible eye-catching layer on the outside of the voltage equalizing ring body. When the insulator flashover occurs, the discharge arc will cause the fusible eye-catching layer to fuse or burn. The troubleshooter is on the ground You can clearly see the flashover position, saving a lot of manpower and material resources. Patent CN2399805 (a high-voltage insulator that can indicate flashover faults) coats organic and inorganic composite materials on the high-voltage insulator porcelain skirt to form a covering film; its color is obviously different from that of the porcelain skirt matrix; after a flashover fault occurs , the cover film is burned by the high temperature of the arc, and the color of the exposed porcelain skirt is obviously different from the original color of the cover film, which indicates a flashover fault; but the workload of manual line inspection is heavy.

The patent CN2121032 (insulator flashover display) adopts the electromagnetic principle, uses the static iron core and the attracting armature to form a magnetic flux circuit, senses the flashover fault signal, and uses the attracting armature to drive the action of the display board, which integrates sensing and driving, and solves the problem of The short-circuit power outage time caused by the flashover of the suspension insulator is long, it is difficult to find the fault point, and the labor intensity of the line-finding engineers and technicians is high. Patent CN2251144 (disk-type insulator flashover recording indicator) uses the arcing ring to guide the insulator flashover current to flow through the electromagnetic energy converter, and drives the transmission indicator mechanism to record the action, which is convenient and quick to detect the faulty insulator string and reduce power outage due to line failure The resulting loss improves the reliability of the entire high-voltage output circuit. Patent CN2054909 (insulator dirty flash point (flashover point) indicator) uses the interceptor plate installed on the uppermost insulator cap of the insulator string of the transmission line to introduce the flashover short-circuit current to the signal indicator, so that the fuse of the signal indicator Fuse to reveal a brightly colored logo flag, showing a clear signal. However, in this patent, the arc ring/cut-off plate may change the electric field distribution on the insulator string, and the fuse can only act once, cannot indicate repeated flashovers, and is inconvenient to replace.

The above patents all perform flashover indication locally on the flashover insulator. Although the flashover indication is more direct and clear, manual line inspection is still required, and the workload of operation and maintenance personnel is still heavy.

Patent CN200620154557.1 (transmission line insulator flashover fault monitoring and positioning device) includes a large current monitoring circuit, a power supply and its management circuit, an analog-to-digital conversion module, a single-chip microprocessor, a clock circuit and a micro-power wireless communication module. The above-mentioned power supply and its management circuit are responsible for supplying power to the entire device; the micro-power consumption wireless communication module is connected with the communication interface of the single-chip microprocessor, and is responsible for sending and receiving data; the clock circuit is connected with the single-chip microprocessor through the I2C bus, As a real-time clock inside the device to determine the time of failure; the analog-to-digital conversion module samples the analog output of the large current monitoring circuit and the voltage of the battery in the power supply and its management circuit, and transmits the data to the microprocessor after analog/digital conversion , and wirelessly send the flashover information to the network. The invention can count, reduce the on-site workload of fault inspection, improve work efficiency, accurately and timely find fault points, reduce misjudgment of tripping caused by flashover of insulator strings, shorten the time for fault elimination, and significantly enhance economic benefits. Patent CN2597997 (high-voltage transmission line insulator flashover telemetry system) utilizes solar battery-powered insulator flashover information transmitting device and insulator flashover information receiving device to connect through a wireless communication network, and remotely transmit the time, place and flashover of high-voltage transmission line insulator flashover It can fundamentally solve the problem of relying on workers to inspect lines and climb poles to find flashover points. Due to the large number of line insulators, the cost of this patent is too high, and the flashover fault of the insulators is not intuitive. Moreover, the microelectronic circuit used in the patent is susceptible to interference from the corona and flashover transient strong electric field at the operating site. In order to enhance the reliability of the entire system, the electromagnetic compatibility design of the system is complicated and costly.

Therefore, there is an urgent need for an intuitive and low-cost positioning device that can automatically detect and judge insulator flashover faults.

Contents of the invention

In view of this, one object of the present invention is to provide a method for locating insulator flashover faults based on discharge light detection.

In order to achieve the above purpose, the present invention provides the following technical solutions: a method for locating insulator flashover faults based on discharge light detection, comprising the following steps: 1) collecting the luminous information on the surface of each insulator by using a camera device installed at each insulator; 2) Analyze the collection results in step 1) to judge whether flashover discharge occurs on each insulator; the judgment method is: analyze each frame of pictures collected in step 1) in real time, if the pixels in some areas in the picture of an insulator If the gray value suddenly changes from dark to bright and exceeds the set threshold, and then becomes dark again, it is judged that the insulator has a flashover discharge; 3) When the insulator has a flashover fault, count the number of flashovers and report to the management terminal Send fault information; 4) The management terminal receives the fault information of the flashover fault insulator, displays the location information of the insulator, and starts the alarm unit to send an alarm signal to the staff.

Further, the camera device described in step 1) of the above method adopts a micro-power consumption pinhole camera.

Further, in the above method, the management terminal adopts a mobile phone or a network computer.

The second object of the present invention is to provide an insulator flashover fault location device based on discharge light detection.

The insulator flashover fault location device based on discharge light detection includes a micro-power consumption pinhole camera, a solar cell and a battery pack, an image processing single-chip microcomputer, a counting unit, a wireless transmission module, an image receiving unit, and an alarm unit; the micro-power consumption The pinhole camera is used to collect insulator flashover discharge light in real time; the image processing single-chip microcomputer is used to control the acquisition parameters of the micro-power pinhole camera and analyze and judge whether the insulator has flashover discharge according to the collection results; The number of times of the network is counted; the wireless transmission module is used to send the flashover picture to the image receiving unit; the solar cell and the battery pack are used to supply power to the micro-power consumption pinhole camera, the image processing single-chip microcomputer, the counting unit and the wireless transmission module; The image receiving unit is used to receive and store the flashover picture sent by the wireless sending module, and activate the alarm unit to send out an alarm signal according to the received information.

Further, the wireless sending module adopts a GPRS wireless module.

Further, the image receiving unit adopts a mobile phone or a network computer.

Further, the image processing single-chip microcomputer can process the collected image of the moving object, and send reminder information to the image receiving unit through the wireless sending module.

The beneficial effects of the present invention are as follows: 1. The present invention visually, quickly and accurately locates the flashover fault insulator by video recording the surface of the insulator and analyzing and judging the flashover, sending flashover pictures and outputting an alarm, etc., and solves the labor intensity of the line-hunting engineering technicians Large and difficult to quickly locate the problem, improve work efficiency, reduce the misjudgment of tripping caused by insulator string flashover, shorten the time for fault elimination, and significantly enhance economic benefits. 2. The present invention adopts optical isolation, the transient electromagnetic interference received by the microelectronic circuit is small, and the work reliability is high. At the same time, the present invention can also increase the recognition and remote control functions of moving objects in the image processing single-chip microcomputer program, and play a role in controlling Monitoring functions such as anti-theft and icing of power facilities.

Description of drawings

In order to make the purpose, technical scheme and beneficial effect of the present invention clearer, the present invention provides the following drawings for illustration:

Fig. 1 is the structural representation of the insulator flashover fault location device based on discharge light detection according to the present invention;

Fig. 2 is a working flow chart of the insulator flashover fault location method based on discharge light detection according to the present invention.

Detailed ways

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an insulator flashover fault location device based on discharge light detection according to the present invention, including a micro-power consumption pinhole camera, a solar cell and a storage battery pack, an image processing single-chip microcomputer, a counting unit, a wireless transmission module, and an image receiving unit and alarm unit; for the sake of simplification, only the micro-power consumption pinhole camera, solar cell and battery pack, image processing microcontroller, counting unit and wireless transmission module at a transmission tower are depicted in the figure, and the above components are also used in other It is set at a power transmission tower, and the image receiving unit and alarm unit are used as remote equipment, the number can be selected to use 1 image receiving unit and 1 alarm unit, which can be set in the work room of the staff; among them, the micro-power consumption pinhole camera It is used to collect the flashover discharge light of each insulator in real time, that is, to realize real-time monitoring of the insulator; the image processing single-chip microcomputer is used to control the acquisition parameters of the micro-power pinhole camera and analyze and judge whether the insulator has flashover discharge according to the acquisition result; the counting unit is used for Count the number of flashovers, and the wireless transmission module is used to send flashover pictures to the image receiving unit; the solar battery and battery pack are used to supply power to the micro-power pinhole camera, image processing single-chip microcomputer, counting unit and wireless transmission module; the image receiving unit The unit is used to receive and store the flashover pictures sent by the wireless sending module, display the positioning information, and at the same time start the alarm unit to send out the alarm signal.

The micro-power consumption pinhole camera can be one or more, installed in different parts below the overhead ground wire at the top of the transmission tower, with the lens facing down, avoiding the direct incidence of the sun and lightning light on the camera, and at the same time, it is convenient to observe the discharge on the surface of the insulator from various angles .

The image processing single-chip microcomputer first controls parameters such as the sampling rate and exposure time of the micro-power consumption pinhole camera, and then analyzes each frame of pictures collected in real time. When the threshold value is set, and then it becomes dark again, it is judged that the insulator has a flashover discharge and counted locally; the specific judgment method is: first, if the sky is sunny and the sun is shining, the possibility of flashover of the insulator is very low; secondly, the glass insulator and the Due to the smooth surface of the ceramic insulator, the light reflected into the camera lasts for a long time, while the flashover light lasts for a short time; again, if the light is emitted by lightning in the distance, its brightness is relatively dark; and the light reflected by the smooth surface of the insulator presents a small The blocky spot is not like the curved arc light in the insulator flashover.

The counting unit and the wireless sending module perform local counting and send flashover pictures to the image receiving unit after the image processing single-chip microcomputer analyzes and judges that the flashover result of the insulator is obtained, and the wireless sending module can adopt common wireless transmission including the GPRS module module.

The capacity of the solar cell and the battery pack should be large enough to ensure uninterrupted operation when the insulator flashes over on cloudy days or at night.

The image receiving unit is used to receive and store the flashover pictures sent by the wireless sending module, display positioning information to the staff, and start the alarm unit to send an alarm signal; the image receiving unit can use terminals such as mobile phones or network computers, and the alarm unit can use Sound and light alarm, the staff can easily use these terminal devices to realize real-time monitoring of insulator flashover faults, and quickly deal with them according to the alarm signal.

As an improvement of this embodiment, the recognition function to the moving object is added in the image processing single-chip microcomputer program, the image processing single-chip microcomputer can process the moving object image collected, and send reminder information to the image receiving unit through the wireless sending module, like this It plays the role of monitoring the power facilities against theft and icing.

Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that it can be described in terms of form and Various changes may be made in the details without departing from the scope of the invention defined by the claims.

Claims (2)

1. A kind of insulator flashover fault localization method based on discharge light detection, it is characterized in that: comprise the following steps: 1) Use the camera device installed on the top of each transmission tower to collect the luminous information on the surface of each insulator; 2) Analyze the collection results in step 1), and judge whether flashover discharge occurs in each insulator; the judgment method is: analyze the pictures of each frame collected in step 1) in real time, if some areas in the picture of an insulator If the gray value of the pixel suddenly changes from dark to bright and exceeds the set threshold, and then becomes dark again, it is judged that the insulator has a flashover discharge; 3) When the insulator has a flashover fault, count the number of flashovers and send the fault information to the management terminal; 4) The management terminal receives the fault information of the flashover fault insulator, displays the location information of the insulator, and starts the alarm unit to send an alarm signal to the staff at the same time; In step 1), described camera device adopts micro-power consumption pinhole camera; The management terminal adopts a mobile phone or a network computer. 2. An insulator flashover fault location device based on discharge light detection, characterized in that: it includes a micro-power consumption pinhole camera, a solar cell and a battery pack, an image processing single-chip microcomputer, a counting unit, a wireless transmission module, an image receiving unit and an alarm unit; the micro-power consumption pinhole camera is used to collect insulator flashover discharge light in real time; the image processing single-chip microcomputer is used to control the acquisition parameters of the micro-power consumption pinhole camera and analyze and judge whether the insulator has flashover discharge according to the collection results; The counting unit is used to count the number of flashovers; the wireless sending module is used to send flashover pictures to the image receiving unit; The unit and the wireless transmission module are powered; the image receiving unit is used to receive and store the flashover pictures sent by the wireless transmission module, and start the alarm unit according to the received information; the alarm unit is used to send an alarm signal to the staff; Described wireless sending module adopts GPRS wireless module; The image receiving unit adopts a mobile phone or a network computer; The image processing single-chip microcomputer can also process the collected image of the moving object, and send reminder information to the image receiving unit through the wireless sending module.