Overhead line fault on-line monitoring device
By installing fault detection devices on overhead lines, using CT power modules for power supply, and combining eddy current sensors and infrared sensors, efficient and reliable fault monitoring of overhead lines has been achieved. This solves the problem of insufficient monitoring capability of UAV visual methods in adverse weather conditions and improves the continuity and accuracy of line inspection.
Patent Information
- Application Number
- CN202422967001.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2034-12-03
AI Technical Summary
Existing UAV-based visual methods are inadequate for detecting faults in overhead lines, especially in the early stages of damage, and their capabilities are limited under adverse weather conditions, failing to meet the demands for efficient and reliable online monitoring.
An online fault monitoring device for overhead lines is adopted, including a fault detection device, a CT energy harvesting module, an eddy current sensor, and an infrared sensor. The CT energy harvesting module obtains energy from the magnetic field around the single-core overhead line to supply power. Combined with the eddy current sensor and the infrared sensor, the eddy current signal and thermal radiation signal of the line are detected. The data is uploaded by the processor to determine the fault.
It enables continuous and efficient monitoring of overhead line faults without the need for external power supply, improves inspection capabilities, avoids the need for battery maintenance and replacement, and can detect line defects in a timely manner.
Smart Images
Figure CN223827763U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to power inspection technical field especially, it is an overhead line fault on -line monitoring device. BACKGROUND
[0002] With the rapid development of electric power, the requirement of line safety is also higher and higher. High-voltage overhead transmission line generally adopts steel-cored aluminum stranded wire, because it is in the open air for a long time, the operation environment is very poor, and it is affected by various natural conditions. For example, the process of most steel-cored aluminum stranded wire producing broken strand defect in the working process is that the wind-induced vibration causes the micro-motion wear between the wire and the clamp and the wire and the wire; under the corrosion of NaCl and other gas-liquid existing in the atmospheric environment, the fatigue life of the wire is greatly reduced, thereby causing a series of fatigue cracks, with the expansion of the cracks and holes, finally leading to the broken strand damage of the steel-cored aluminum stranded wire. If the broken strand damage existing in the transmission line cannot be detected in time, it may cause the wire to break, the transmission line to fail, and accidents such as electric leakage, electric shock, short circuit, fire, etc. to occur, causing regional power outage; endangering personal and property safety, and seriously affecting people's life. Therefore, it is of great significance to regularly inspect the transmission line.
[0003] The unmanned aerial vehicle vision method has the advantages of fast detection speed and high efficiency, and can find damage conditions of other components except the wire, but generally can only find defects when the wire surface broken strand is raised and produces broken strand, and cannot detect defects in time in the initial stage of damage, and has certain limitations. In addition, due to the existence of certain blind area of the optical image sensor carried by the unmanned aerial vehicle and the great influence of the optical image sensor on weather and time, the optical image sensor may not work normally in fog, rain weather or night conditions, so the working capacity is limited. SUMMARY
[0004] To solve the above problems, the purpose of the embodiment of the utility model is to provide an overhead line fault on-line monitoring device.
[0005] An overhead line fault on-line monitoring device comprises:
[0006] A fault detection device is used for detecting whether a single-core overhead line appears a fault; the fault detection device comprises an upper shell and a lower shell, screw reserved holes are arranged on the upper shell and the lower shell, and a connecting screw passes through the screw reserved holes to connect the upper shell and the lower shell together; semicircular perforations are arranged on the side surfaces of the upper shell and the lower shell, and the two form a single-core overhead line perforation for being arranged on the single-core overhead line;
[0007] A CT energy taking module is connected with the fault detection device, used for taking energy from the constantly changing magnetic field around the single-core overhead line and converting the energy into electric energy to power the fault detection device.
[0008] Preferably, further comprising:
[0009] At least one eddy current sensor arranged on the lower shell and used for detecting the eddy current signal of the single-core overhead line;
[0010] An infrared sensor arranged on the lower shell and used for detecting the heat radiation signal of the single-core overhead line;
[0011] A processor arranged on the lower shell and connected with the eddy current sensor, the infrared sensor and the WIFI module respectively, used for uploading the eddy current signal and the heat radiation signal of the single-core overhead line to the upper computer to facilitate the staff to determine whether the single-core overhead line is faulty.
[0012] Preferably, further comprising:
[0013] A limiting structure arranged between the upper shell and the lower shell and used for fixing the upper shell and the lower shell to avoid the shaking of the upper shell and the lower shell.
[0014] Preferably, further comprising:
[0015] A conditioning circuit, which is an AD digital-analog conversion module; the processor is in communication connection with the eddy current sensor and the infrared sensor through the AD digital-analog conversion module.
[0016] According to the specific embodiments of the utility model, the utility model discloses the following technical effects:
[0017] The utility model relates to an overhead line fault on -line monitoring device, compare with prior art, the utility model discloses a CT energy taking module can obtain energy from the constantly changing magnetic field around the single-core overhead line, this makes monitoring device can independently operate, need not external power supply, not only has improved on -line monitoring device's sustained patrol ability, also avoided the demand of maintenance and battery replacement.
[0018] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0020] Fig. 1 The present application provides an overhead line fault online monitoring device shell expansion schematic diagram;
[0021] Fig. 2 The present application provides an overhead line fault online monitoring device overall structure schematic diagram;
[0022] Fig. 3 The present application provides a monitoring device circuit principle diagram.
[0023] Symbol explanation:
[0024] 1, upper shell; 2, first eddy current sensor; 3, second eddy current sensor; 4, infrared sensor; 5, limiting structure; 6, upper and lower body connecting screw; 7, lower shell; 8, CT energy module; 9, single-core overhead line perforation. DETAILED DESCRIPTION
[0025] In the description of the present application, it is understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0026] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0027] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connect;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can pass through intermediate medium indirectly connect, can be two element inside intercommunication.For ordinary skilled person in the art, the above terms can be understood according to the specific meaning in the utility model.
[0028] Please refer to Figs. 1-3 An overhead line fault on-line monitoring device, comprising: fault detection device and CT energy taking module 8.
[0029] Fault detection device is used for detecting whether single-core overhead line appears fault;The fault detection device includes upper shell 1 and lower shell 7, and screw reserved holes are arranged on the upper shell 1 and the lower shell 7, and the upper and lower body connecting screw 6 passes through the screw reserved holes to connect the upper shell 1 and the lower shell 7 together;The side of the upper shell 1 and the lower shell 7 is provided with semicircular perforation, and the semicircular perforation is combined to form single-core overhead line perforation for being arranged on single-core overhead line;
[0030] Limiting structure 5 is arranged between the upper shell 1 and the lower shell 7, and is used for fixing the upper shell 1 and the lower shell 7 to avoid the upper shell 1 and the lower shell 7 from shaking.
[0031] CT energy taking module 8 is connected with the fault detection device, is used for obtaining energy from the constantly changing magnetic field generated around single-core overhead line and converting the energy into electric energy to power the fault detection device.
[0032] Further, it further includes: eddy current sensor, infrared sensor 4, processor and WIFI module.
[0033] At least one eddy current sensor is arranged on the lower shell 7 and is used for detecting the eddy current signal of single-core overhead line;Infrared sensor 4 is arranged on the lower shell 7 and is used for detecting the heat radiation signal of single-core overhead line;
[0034] Processor is arranged on the lower shell 7 and is connected with the eddy current sensor, infrared sensor 4 and WIFI module respectively, and is used for uploading the eddy current signal and heat radiation signal of single-core overhead line to the upper computer, so that the staff can judge whether single-core overhead line appears fault.
[0035] Conditioning circuit, the conditioning circuit is AD digital-analog conversion module;The processor is communicatedly connected with the eddy current sensor and infrared sensor through AD digital-analog conversion module.
[0036] It should be noted that the sensor includes two types of infrared camera for checking the outer surface of the line and eddy current sensor for monitoring the internal and external defects of the wire, both of which are installed on the lower shell along the outer surface of the wire side. Among them, the eddy current sensor can be arranged 2-3 (2 in the figure), so as to monitor the hidden dangers of the wire completely in 360 degrees.
[0037] The high-voltage overhead transmission line generally adopts aluminum-clad steel transmission line, and the current transmission of the transmission line is mainly borne by the aluminum wire, and the tensile force is mainly borne by the steel wire. When the power transmission wire breaks and is damaged, the cross-sectional area will change, resulting in a change in the resistance of the local power transmission wire. Under certain current conditions, since the heat dissipation medium and the wire material are uniform, according to the thermal theory, the temperature at the broken point will change, that is, local heating will occur near the broken and damaged point of the power transmission wire, thereby increasing the radiation energy near the broken and damaged point of the power transmission wire, and the increased part of the radiation energy is in parabolic distribution. At the broken and damaged fault point, the temperature rises and the radiation energy increases, and accordingly, the detection of the broken and damaged fault of the power transmission wire can be processed by using an infrared sensor sensitive to the change of radiation energy. Since the infrared camera can observe the fine changes on the surface of the line at close range, the faults on the surface of the line can also be directly photographed. The eddy current detection method can accurately detect the broken steel core aluminum stranded wire, the corrosion degree of the steel core, and the damage of the OPGW armor layer. When the power transmission line breaks, is damaged, or has other faults such as serious corrosion, the degree and position information of the related fault defects can be extracted according to the distortion degree of the eddy current.
[0038] The detection device in the embodiment includes a CT energy taking module, an AD conversion module, a conditioning circuit, three eddy current sensors, and an infrared imaging module. The CT energy taking module is connected with the fault detection device, used to obtain energy from the constantly changing magnetic field generated around the single-core cable and convert it into electric energy to power the fault detection device. The conditioning module is an AD-DAC module, and the processor is connected with each sensor through the AD-DAC module. The infrared camera is used to detect the surface damage of the line, and the three eddy current sensors each detect a 120° area on the surface of the line to achieve full coverage sensing (when there are two eddy current sensors, each monitors 180 degrees). Finally, the data captured by the infrared sensor module and the eddy current sensor are uploaded to the upper computer through WIFI, which is convenient for the staff to judge whether the single-core cable has a fault. When the surface layer of the power transmission line is damaged, the temperature at the fault point rises and the radiation energy increases, and an infrared sensor sensitive to the change of radiation energy can be used to judge the fault position by detecting the thermal radiation fault signal. When the power transmission line breaks, is damaged, or has other faults such as serious corrosion, the degree and position information of the related fault defects can be extracted according to the distortion degree of the eddy current.
[0039] The utility model discloses through utilizing CT energy taking module can obtain energy from the magnetic field that single core overhead line surrounds unceasing change, this makes monitoring device can independently operate, need not external power supply, not only improved the sustained inspection ability of on-line monitoring device, also avoided the demand of maintenance and replacement battery.
[0040] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of the changed or replaced technical solution within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. An online fault monitoring device for overhead lines, characterized in that, include: Fault detection device, used to detect whether a fault has occurred in a single-core overhead line; The fault detection device includes an upper housing and a lower housing. Both the upper housing and the lower housing are provided with screw pre-drilled holes. The upper and lower housings are connected together by a connecting screw through the screw pre-drilled holes. Both the upper housing and the lower housing are provided with semi-circular through holes on their sides. The two together form a single-core overhead line through hole for threading a single-core overhead line. The CT energy harvesting module, connected to the fault detection device, is used to harvest energy from the constantly changing magnetic field generated around the single-core overhead line and convert it into electrical energy to power the fault detection device.
2. The overhead line fault online monitoring device according to claim 1, characterized in that, Also includes: At least one eddy current sensor is mounted on the lower housing to detect eddy current signals of a single-core overhead line; An infrared sensor, mounted on the lower housing, is used to detect the thermal radiation signal of a single-core overhead line; The processor, located on the lower housing, is connected to the eddy current sensor, infrared sensor, and WIFI module. It is used to upload the eddy current signal and thermal radiation signal of the single-core overhead line to the host computer, so that the staff can determine whether the single-core overhead line has a fault.
3. The overhead line fault online monitoring device according to claim 2, characterized in that, Also includes: A limiting structure is provided between the upper housing and the lower housing to fix the upper housing and the lower housing and prevent the upper housing and the lower housing from shaking.
4. The overhead line fault online monitoring device according to claim 3, characterized in that, Also includes: The conditioning circuit is an AD digital-to-analog converter module; The processor is connected to the eddy current sensor and the infrared sensor via an AD converter module.