CN108680829B - Fault positioning on-line monitoring system for power transmission line - Google Patents
Fault positioning on-line monitoring system for power transmission line Download PDFInfo
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- CN108680829B CN108680829B CN201810622631.5A CN201810622631A CN108680829B CN 108680829 B CN108680829 B CN 108680829B CN 201810622631 A CN201810622631 A CN 201810622631A CN 108680829 B CN108680829 B CN 108680829B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 58
- 238000004891 communication Methods 0.000 claims abstract description 37
- 239000012945 sealing adhesive Substances 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 5
- 239000002390 adhesive tape Substances 0.000 claims description 4
- 125000004122 cyclic group Chemical group 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 3
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- 239000004020 conductor Substances 0.000 claims description 2
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- 238000005259 measurement Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The application provides an online monitoring system for fault location of a power transmission line, which comprises the following components: the system comprises a plurality of current detection devices, a plurality of current detection devices and a plurality of current detection devices, wherein at least three detection points are arranged between two adjacent substations, and each detection point is provided with a current detection device; each current detection device is connected to one sub-controller; the first wireless communication module is connected with each sub-controller; the second wireless communication modules are all connected to a second wireless communication module in a communication way; and the master controller is connected with the second wireless communication module and calculates the fault point position according to the detection data of each current detection device. The power transmission line fault positioning on-line monitoring system solves the problem that in the prior art, whether a fault occurs or not and the fault position is found out are simultaneously realized in a controller, so that the controller is easy to be in a machine halt state.
Description
Technical Field
The application relates to transmission line fault detection, in particular to an online transmission line fault positioning monitoring system.
Background
Disclosed in chinese patent is a transmission line fault location system with application number CN201520275841.3, the transmission line fault location system includes: the sampling device is connected with the power transmission line; the data acquisition device is connected with the sampling device; the fault starting device is connected with the data acquisition device; the wireless transmission device is connected with the fault starting device; the power supply device is connected with the power transmission line, the data acquisition device, the fault starting device and the wireless transmission device; and the background is in signal connection with the wireless transmission device, receives and stores fault data, and judges the fault position through the time difference between the first fault waveform and the second fault waveform acquired by the data acquisition device when the fault occurs, the transmission speed of the traveling wave in the power transmission line and the distance between the sampling device and the reflector. Although this system enables single-ended fault location measurement, the coil still suffers from the disadvantages:
the system needs to record the time t1 when the sampling device receives the traveling wave and the time t2 when the sampling device receives the echo, and the transmission speeds of the default traveling wave and the echo in the online are v which are known, but the transmission speeds of the wave and the echo in the online are changed, and the echo does not know whether the echo can be truly detected, so the probability of obtaining the fault position is small and the precision is not high.
The China patent discloses a distributed fault positioning method of a power transmission line with a fault tolerance function and an application number 201410041394.5, which comprises the following steps that firstly, N detection points are arranged on a high-voltage power transmission line between an adjacent transformer substation M and a transformer substation N; step two, detecting and reading three-phase fault current traveling wave information of each detection point; step three, removing invalid detection points without data in three phases, and determining a fault interval according to traveling wave head information; step four, calculating the traveling wave velocity v: and fifthly, selecting a proper fault location formula according to the corresponding fault interval to measure the distance. Although the method realizes reliable line fault positioning when the individual monitoring devices in the system are abnormal, the method has the following defects:
the method does not realize judging whether the fault occurs or not, and if the judging whether the fault occurs or not and the searching of the fault position are realized in one controller at the same time, the load of the controller is larger, and the phenomenon that the controller is started up is extremely easy to occur.
Disclosure of Invention
The application provides an online monitoring system for positioning faults of a power transmission line, which solves the problem that in the prior art, the fault occurrence judgment and fault position searching are realized in a controller at the same time, so that the controller is easy to be in a local state.
In order to achieve the above purpose, the present application adopts the following technical scheme:
an on-line monitoring system for power transmission line fault location, comprising:
the system comprises a plurality of current detection devices, a plurality of current detection devices and a plurality of current detection devices, wherein at least three detection points are arranged between two adjacent substations, each detection point is provided with a current detection device, and each current detection device is used for detecting the current output value of the detection point;
each current detection device is connected to one sub-controller, and the sub-controllers are used for judging whether the received current output value exceeds a threshold value or not and sending out the received current output value when the current output value of one current detection device between two adjacent substations is larger than the threshold value;
the first wireless communication module is connected with each sub-controller;
the second wireless communication modules are all connected to a second wireless communication module in a communication way;
the main controller is connected with the second wireless communication module and calculates the fault point position according to the detection data of each current detection device;
the third wireless communication module is connected with the master controller;
a fourth wireless communication module communicatively coupled to the third wireless communication module; and
the service station is connected with the fourth wireless communication module, is connected to a plurality of mobile devices for maintenance operators, acquires the positions of the mobile devices, and calculates the mobile device closest to the fault point according to the positions of the mobile devices and the fault point.
Compared with the prior art, the application has the following beneficial effects:
when the device works, firstly, each current detection device senses the current in the line in each detection point in real time to obtain a current output value, and the larger the current output value is, the larger the line current in the detection point is; then, each sub-controller judges whether faults occur according to the current output values, each sub-controller and the first wireless communication module are located at one position with the corresponding current detection device so that data of each current detection device can be transmitted out in a long distance, when one sub-controller judges that faults occur, the sub-controller informs all sub-controllers between all two adjacent substations to transmit current values to the main controller through the main controller, the sub-controllers are clear, the sub-controllers only transmit data to the main controller when faults occur, the transmission of unnecessary current output values is lightened, the data transmission burden of the sub-controllers, the first wireless communication module and the second wireless communication module is lightened, meanwhile, the sub-controllers share the task of judging whether faults occur for the main controller, and the burden of the main controller is lightened; then, when the fault occurs, the sub-controllers send all the current output values (including the current output values and the occurrence time points corresponding to the current output values) to the master controller, and the master controller calculates the fault position according to the method described in the patent number 201410041394.5; then, the master controller sends the fault position to the service station through the third wireless communication equipment and the fourth wireless communication equipment and informs the service station to find a maintainer for rush repair; and finally, the service station acquires the positions of all maintainers from the mobile equipment through GPS positioning of the mobile equipment, so that the maintainers closest to the fault position are dispatched to carry out emergency repair on the fault point, and the emergency repair service is faster. The application is not an application of the application, which is an electric system, the computer program is a known program, and the computer program is only distributed to different devices for execution.
Additional advantages, objects, and features of the application will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the application.
Drawings
FIG. 1 is a circuit block diagram of an on-line monitoring system for transmission line fault location;
FIG. 2 is a schematic diagram of the structure of a Rogowski coil;
FIG. 3 is a schematic view of the upper housing and lower housing of FIG. 2, shown in section at the hinge;
FIG. 4 is an enlarged view at B in FIG. 3;
fig. 5 is a cross-sectional view A-A of the cartridge of fig. 2.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the present application more clear and easy to understand, the present application is further described below with reference to the accompanying drawings and the detailed description:
as shown in fig. 1, this embodiment proposes an online monitoring system for fault location of a power transmission line, including:
the system comprises a plurality of current detection devices, a plurality of current detection devices and a plurality of current detection devices, wherein at least three detection points are arranged between two adjacent substations, each detection point is provided with a current detection device, and each current detection device is used for detecting the current output value of the detection point;
each current detection device is connected to one sub-controller, and the sub-controllers are used for judging whether the received current output value exceeds a threshold value or not and sending out the received current output value when the current output value of one current detection device between two adjacent substations is larger than the threshold value;
the first wireless communication module is connected with each sub-controller;
the second wireless communication modules are all connected to a second wireless communication module in a communication way;
the main controller is connected with the second wireless communication module and calculates the fault point position according to the detection data of each current detection device;
the third wireless communication module is connected with the master controller;
a fourth wireless communication module communicatively coupled to the third wireless communication module; and
the service station is connected with the fourth wireless communication module, is connected to a plurality of mobile devices for maintenance operators, acquires the positions of the mobile devices, and calculates the mobile device closest to the fault point according to the positions of the mobile devices and the fault point.
Each current detection device is a rogowski coil.
As shown in fig. 2 and 3, the rogowski coil includes: go up casing, go up skeleton, go up coil, lower casing, lower skeleton, lower coil and coupling mechanism, upward be provided with the skeleton in the casing, upward the winding has last coil on the skeleton, upward casing one end articulates there is lower casing, is provided with lower skeleton in the lower casing, and the winding has lower coil on the lower skeleton, is provided with coupling mechanism in the articulated department of last casing and lower casing to coupling mechanism makes last coil and lower coil electric connection when last casing and lower casing enclose into a cyclic annular, coupling mechanism does not hinder the separation of last coil and lower coil when the casing is rotatory relatively down. The problem that in the prior art, a complete annular winding coil cannot be formed by the winding coil in the upper coil housing and the winding coil in the lower coil housing, so that the error of a detection result is influenced by a small current output value obtained by detection is solved. Through setting up coupling mechanism, realized after the installation (namely: when upper casing and lower casing enclose into a cyclic annular) upper coil and lower coil's electricity switch-on for upper coil and lower coil form a complete annular coil, have avoided the electric current output value in lower coil and the lower coil of need measuring respectively, have reduced the trouble of detecting, also make the response more sensitive simultaneously, the electric current output value that obtains is bigger, and the error that the measurement obtained is less, improves measuring result's accuracy.
As shown in fig. 3 and 4, for designing a connection mechanism with a simple structure and convenient use, and ensuring that an upper coil and a lower coil can be in close contact after a complete ring shape is formed between an upper housing and a lower housing, the connection mechanism avoids a phenomenon of poor contact, and comprises: the movable block, rotatory piece and first spring, go up the inboard sunken first recess that forms of casing, lower casing inboard sunken second recess that forms, first recess and second recess are all close to the articulated department of last casing and lower casing, first recess inner wall sunken formation telescopic hole, movable block one end stretches into in the telescopic hole and is fixed to first spring one end, first spring other end is fixed to on the telescopic hole inner wall, the movable block can move relative last casing, the movable block removal direction is on a straight line with the central line of first spring, go up the coil electricity and be connected to the movable block, movable block and rotatory piece all adopt conductive material to make, second recess inner wall is fixed to rotatory piece one end, rotatory piece other end upwards casing place orientation extends, rotatory piece electricity is connected to lower coil, in order to follow last casing inboard stretches into in the first recess when last casing and lower casing enclose into a cyclic annular, rotatory piece is hugged closely with the movable block and first spring is compressed. When the upper shell and the lower shell are enclosed into a ring, the lower shell drives the rotating block to rotate, the rotating block has a tendency of rotating in the direction of the lower shell, the rotating block slowly stretches into the first groove, then the moving block is extruded, so that the first spring is compressed, and finally, the moving block and the rotating block are tightly contacted under the elasticity of the first spring, the phenomenon of poor contact between the moving block and the rotating block is avoided, and the upper coil and the lower coil are electrically contacted. When the upper shell and the lower shell are broken off, the rotating block rotates in the direction deviating from the lower shell, and finally the rotating block is separated from the moving block, so that the rotating block and the moving block cannot influence the rotation between the upper shell and the lower shell.
As shown in fig. 3 and 4, the connection mechanism further includes: the end part of the moving block in the telescopic hole is fixed on an outer ring, the first spring surrounds the outer ring, the inner wall of the telescopic hole is fixed to one end of a central column, the other end of the central column stretches into one end of the outer ring, which is away from the moving block, the end part of the central column stretches into the outer ring and is not separated from the outer ring, the central column does not obstruct the movement of the outer ring, one end of the upper coil stretches into the central column and is connected to one end of the first connecting wire located in the outer ring, and the other end of the first connecting wire is fixed to the moving block. In order to avoid the first connecting wire winding is knotted on the first spring because the first spring is compressed, the first spring is compressed in the moving process of the moving block to the first spring, but the outer circle always surrounds the first connecting wire and the center column, so that the first connecting wire is not clamped in the first spring, the first connecting wire is protected, the first connecting wire is prevented from being damaged due to knotting, and the service life is prolonged.
As shown in fig. 2, 3 and 4, the power transmission line fault location on-line monitoring system further comprises a sealing assembly, wherein the sealing assembly comprises a sealing adhesive tape, and the sealing adhesive tape is used for sealing the first groove and the second groove. Since the moving block is in electrical contact with the rotating block, in order to avoid water and the like entering the first groove and the second groove to influence the contact of the first groove and the second groove, the sealing adhesive tape is arranged so that the first groove and the second groove are sealed and protected.
As shown in fig. 2, 4 and 5, in order to achieve that the first groove and the second groove can be repeatedly sealed when the coil is reinstalled, the sealing assembly further includes:
the box body is arranged on the lower shell and is close to the hinge joint of the lower shell and the upper shell, and a convolution cavity is formed in the box body; and
the convolution portion, it sets up in the convolution chamber, and convolution portion includes convolution pole, first rotating member and second rotating member, is used for convolution seal adhesive tape on the convolution pole, and convolution pole one end is fixed to first rotating member, and the convolution pole other end is fixed to second rotating member, has seted up the perforation on the box body to make the seal adhesive tape that pulls out from the convolution pole wear out from the perforation, first rotating member and second rotating member can rotate relative box body. When the upper shell and the lower shell need to be disassembled, firstly tearing off the sealing adhesive tapes wrapped outside the first groove and the second groove, and then breaking off the upper shell and the lower shell. After the upper shell and the lower shell are reinstalled, the used sealing adhesive tape sections are subtracted, and then a new sealing adhesive tape is pulled out, so that the new sealing adhesive tape is wound outside the first groove and the second groove, the sealing adhesive tape is prevented from being invalid due to multiple adhesion, and the sealing effect of the second installation on the first groove and the second groove is ensured.
As shown in fig. 5, in order to ensure that the end of the sealing tape, which is close to the case, can be closely attached to the lower case at the time of sealing, and in order to avoid the lower case from obstructing the pulling-out of the sealing tape at the time of pulling-out the sealing tape, the sealing assembly further comprises: a moving part;
the moving part includes: the first movable rod, the second movable rod, the screw rod and the third rotating piece, two movable holes are formed in the bottom of the convolution cavity, the first movable rod and the second movable rod are of cuboid structures, one end of the first movable rod stretches into one movable hole, the other end of the first movable rod is hinged to the first rotating piece, one end of the second movable rod stretches into the other movable hole, the other end of the second movable rod is hinged to the second rotating piece, the end portion of the second movable rod, located in the convolution cavity, is hinged to the third rotating piece, the third rotating piece is fixed to one end of the screw rod, the screw rod penetrates through the box body and is in threaded connection with the box body, the other end of the screw rod stretches out of the box body, the first movable rod, the second movable rod and the screw rod are parallel to each other, and the screw rod is perpendicular to the convolution rod. When the upper shell and the lower shell are reinstalled, firstly, the screw is rotated to ensure that the distance from the convolution rod to the lower shell is large enough, and in the process, the first moving rod and the second moving rod are of cuboid structures, so that the second moving rod cannot rotate due to the rotation of the screw, and the first moving rod and the second moving rod cannot rotate and only can lift; then, pulling the sealing adhesive tape to expose the new sealing adhesive tape; then subtracting the used sealing adhesive tape section; then, further pulling out the new sealing adhesive tape; finally, the screw rod is rotated to keep the tight state of the sealing adhesive tape, but the sealing adhesive tape is not pulled out from the convolution rod (the pulling out force from the convolution rod is larger), so that the outer sealing adhesive tape of the convolution rod is finally close to the lower shell, and finally the pulled sealing adhesive tape bypasses the first groove and the second groove, so that the new sealing adhesive tape is wound outside the first groove and the second groove, the sealing adhesive tape is prevented from being invalid due to repeated adhesion, and the sealing effect of the second installation on the first groove and the second groove is ensured.
As shown in fig. 5, in order to avoid that the convolution rod is further pulled out by the force of the sealing adhesive after the sealing adhesive is pulled out, the sealing assembly further comprises: a rotation limiting part;
the rotation limiting part comprises: the device comprises a mounting shell, a clamping rod, a gear, a second spring, a roller and a wedge, wherein the mounting shell is fixed on a first moving rod, the mounting shell and the first moving rod form a cavity communicated with a first rotating part, the surface of the first rotating part, which is positioned in the cavity, is sunken to form a clamping hole, an inner gear ring is formed on the inner wall of the clamping hole, a gear which can be meshed with the inner gear ring is arranged in the cavity, the gear is connected to one end of the clamping rod, the other end of the clamping rod extends out of the cavity, the moving direction of the clamping rod relative to the first moving rod is parallel to the convolution rod, the clamping rod cannot rotate relative to the mounting shell, the clamping rod passes through a second spring positioned in the cavity, one end of the second spring is fixed with the gear, the other end of the second spring is fixed with the inner wall of the cavity, the end of the clamping rod, the end, which is positioned outside the cavity, is provided with a rotatable roller, a wedge is tangent to the roller, and is fixed on the inner wall of the convolution cavity, the small end of the wedge is positioned on one side of the lower shell, the wedge is tangent to the roller, and when the seal outside the convolution rod is tightly attached to the lower shell, the roller is tangent to the large end of the wedge, and the gear is meshed with the inner gear ring; when the sealing adhesive tape outside the convolution rod is far away from the lower shell, the roller is tangent with the inner wall of the convolution cavity, and the gear is separated from the clamping hole under the elasticity of the second spring. The large end of the wedge block is long enough, so that when the roller is near the small end of the wedge block, the gear is far away from the clamping hole under the elasticity of the second spring, and the sealing adhesive tape can be pulled out only at the moment; when the screw is screwed in, only a small section can not pull the sealing adhesive tape, so that the sealing adhesive tape is prevented from being pulled out very long, after the screw is rotated for a period of time, the roller is led to the large end of the wedge block, the gear is meshed with the inner gear ring under the extrusion of the wedge block, the first rotating part can not rotate relative to the first moving rod, the sealing adhesive tape can not be pulled out any more (the sealing adhesive tape is pulled out sufficiently before), then the sealing adhesive tape can be pulled out forcefully, the sealing adhesive tape can not be adhered together, the waste of the sealing adhesive tape is avoided, and the sealing adhesive tape is prevented from being pulled out further due to overlarge force of pulling the sealing adhesive tape when the screw is rotated later.
As shown in fig. 5, in order to make the bearing of the convolution rod not only the second rotation member, the moving portion further includes: and one end of the first moving rod is fixed to one end of the third spring, and the other end of the third spring is fixed to the inner wall of the moving hole where the first moving rod is located. The third spring is always in a compressed state, so that the first rotating piece also has a certain support on the convolution rod, damage to the second rotating piece caused by overlarge stress is avoided, and the service life of the second rotating piece is prolonged.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present application, which is intended to be covered by the scope of the claims of the present application.
Claims (6)
1. An on-line monitoring system for power transmission line fault location, comprising:
the system comprises a plurality of current detection devices, a plurality of current detection devices and a plurality of current detection devices, wherein at least three detection points are arranged between two adjacent substations, each detection point is provided with a current detection device, and each current detection device is used for detecting the current output value of the detection point;
each current detection device is connected to one sub-controller, and the sub-controllers are used for judging whether the received current output value exceeds a threshold value or not and sending out the received current output value when the current output value of one current detection device between two adjacent substations is larger than the threshold value;
the first wireless communication module is connected with each sub-controller;
the second wireless communication modules are all connected to a second wireless communication module in a communication way;
the main controller is connected with the second wireless communication module and calculates the fault point position according to the detection data of each current detection device;
the third wireless communication module is connected with the master controller;
a fourth wireless communication module communicatively coupled to the third wireless communication module; and
the service station is connected with the fourth wireless communication module, is connected to a plurality of mobile devices for maintenance operators, acquires the positions of the mobile devices and calculates the mobile device closest to the fault point according to the positions of the mobile devices and the fault point;
wherein, each electric current detection device is the rogowski coil, the rogowski coil includes: the upper shell is internally provided with an upper framework, the upper framework is wound on the upper framework, one end of the upper shell is hinged with a lower shell, the lower framework is arranged in the lower shell, the lower framework is wound on the lower framework, and the connecting mechanism is arranged at the hinged position of the upper shell and the lower shell, so that the upper coil and the lower coil are electrically connected when the upper shell and the lower shell are enclosed into a ring, and the connecting mechanism does not obstruct the separation of the upper coil and the lower coil when the lower shell rotates relative to the upper shell; the connecting mechanism comprises: the movable block, rotatory piece and first spring, go up the inboard sunken first recess that forms of casing, lower casing inboard sunken second recess that forms, first recess and second recess are all close to the articulated department of last casing and lower casing, first recess inner wall sunken formation telescopic hole, movable block one end stretches into in the telescopic hole and is fixed to first spring one end, first spring other end is fixed to on the telescopic hole inner wall, the movable block can move relative last casing, the movable block removal direction is on a straight line with the central line of first spring, go up the coil electricity and be connected to the movable block, movable block and rotatory piece all adopt conductive material to make, second recess inner wall is fixed to rotatory piece one end, rotatory piece other end upwards casing place orientation extends, rotatory piece electricity is connected to lower coil, in order to follow last casing inboard stretches into in the first recess when last casing and lower casing enclose into a cyclic annular, rotatory piece is hugged closely with the movable block and first spring is compressed.
2. The transmission line fault location online monitoring system of claim 1, wherein the connection mechanism further comprises: the end part of the moving block in the telescopic hole is fixed on an outer ring, the first spring surrounds the outer ring, the inner wall of the telescopic hole is fixed to one end of a central column, the other end of the central column stretches into one end of the outer ring, which is away from the moving block, the end part of the central column stretches into the outer ring and is not separated from the outer ring, the central column does not obstruct the movement of the outer ring, one end of the upper coil stretches into the central column and is connected to one end of the first connecting wire located in the outer ring, and the other end of the first connecting wire is fixed to the moving block.
3. The transmission line fault location online monitoring system according to any one of claims 1 to 2, further comprising a sealing assembly comprising a sealing tape for sealing the first groove and the second groove.
4. The transmission line fault location online monitoring system of claim 3, wherein the seal assembly further comprises:
the box body is arranged on the lower shell and is close to the hinge joint of the lower shell and the upper shell, and a convolution cavity is formed in the box body; and
the convolution portion, it sets up in the convolution chamber, and convolution portion includes convolution pole, first rotating member and second rotating member, is used for convolution seal adhesive tape on the convolution pole, and convolution pole one end is fixed to first rotating member, and the convolution pole other end is fixed to second rotating member, has seted up the perforation on the box body to make the seal adhesive tape that pulls out from the convolution pole wear out from the perforation, first rotating member and second rotating member can rotate relative box body.
5. The transmission line fault location online monitoring system of claim 4, wherein the seal assembly further comprises: a moving part;
the moving part includes: the first movable rod, the second movable rod, the screw rod and the third rotating piece, two movable holes are formed in the bottom of the convolution cavity, the first movable rod and the second movable rod are of cuboid structures, one end of the first movable rod stretches into one movable hole, the other end of the first movable rod is hinged to the first rotating piece, one end of the second movable rod stretches into the other movable hole, the other end of the second movable rod is hinged to the second rotating piece, the end portion of the second movable rod, located in the convolution cavity, is hinged to the third rotating piece, the third rotating piece is fixed to one end of the screw rod, the screw rod penetrates through the box body and is in threaded connection with the box body, the other end of the screw rod stretches out of the box body, the first movable rod, the second movable rod and the screw rod are parallel to each other, and the screw rod is perpendicular to the convolution rod.
6. The transmission line fault location online monitoring system of claim 5, wherein the seal assembly further comprises: a rotation limiting part;
the rotation limiting part comprises: the device comprises a mounting shell, a clamping rod, a gear, a second spring, a roller and a wedge, wherein the mounting shell is fixed on a first moving rod, the mounting shell and the first moving rod form a cavity communicated with a first rotating part, the surface of the first rotating part, which is positioned in the cavity, is sunken to form a clamping hole, an inner gear ring is formed on the inner wall of the clamping hole, a gear which can be meshed with the inner gear ring is arranged in the cavity, the gear is connected to one end of the clamping rod, the other end of the clamping rod extends out of the cavity, the moving direction of the clamping rod relative to the first moving rod is parallel to the convolution rod, the clamping rod cannot rotate relative to the mounting shell, the clamping rod passes through a second spring positioned in the cavity, one end of the second spring is fixed with the gear, the other end of the second spring is fixed with the inner wall of the cavity, the end of the clamping rod, the end, which is positioned outside the cavity, is provided with a rotatable roller, a wedge is tangent to the roller, and is fixed on the inner wall of the convolution cavity, the small end of the wedge is positioned on one side of the lower shell, the wedge is tangent to the roller, and when the seal outside the convolution rod is tightly attached to the lower shell, the roller is tangent to the large end of the wedge, and the gear is meshed with the inner gear ring; when the sealing adhesive tape outside the convolution rod is far away from the lower shell, the roller is tangent with the inner wall of the convolution cavity, and the gear is separated from the clamping hole under the elasticity of the second spring.
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| CN111624541B (en) * | 2020-05-27 | 2022-04-19 | 创新电力技术(海南)有限公司 | Calibration device of ground fault detection device |
| CN111579930B (en) * | 2020-05-27 | 2022-04-19 | 创新电力技术(海南)有限公司 | Ground fault detection positioning device |
| CN111579824B (en) * | 2020-05-27 | 2022-04-19 | 创新电力技术(海南)有限公司 | Ground fault detection device's transportation equipment |
| CN112432667A (en) * | 2020-11-25 | 2021-03-02 | 深圳市特发信息股份有限公司 | Intelligent on-line monitoring system for conducting wire state of power transmission line |
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