CN111239551A - Transient overhead line fault monitoring device - Google Patents
Transient overhead line fault monitoring device Download PDFInfo
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- CN111239551A CN111239551A CN202010165361.7A CN202010165361A CN111239551A CN 111239551 A CN111239551 A CN 111239551A CN 202010165361 A CN202010165361 A CN 202010165361A CN 111239551 A CN111239551 A CN 111239551A
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- waterproof box
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Computer Networks & Wireless Communication (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention relates to the technical field of road fault monitoring, and discloses a transient overhead line fault monitoring device which comprises a collecting unit, a collecting unit and a big data analysis platform, wherein the collecting unit comprises a protective shell, a collector is installed at the lower end of the protective shell, a U-shaped arm is movably installed at the upper end of the protective shell, a through groove is formed in the lower end of the U-shaped arm, a snap spring is arranged at one end of the U-shaped arm, the collecting unit comprises a waterproof box, a cover plate is arranged at the upper end of the waterproof box, supporting frames are arranged on two sides of the waterproof box, a solar power panel is installed at the front end of each supporting frame, a protective grounding terminal is arranged at the lower end of the waterproof box, and a storage battery is arranged in the waterproof box. This transient state type overhead line fault monitoring device ensures to collect the unit and can last work, can not cut off the power supply easily, is convenient for to the maintenance of circuit trouble, can reduce the circuit maintenance.
Description
Technical Field
The invention relates to the technical field of road fault monitoring, in particular to a transient overhead line fault monitoring device.
Background
An intelligent distribution network is one of key links of an intelligent power grid, generally, a power network of 10kV or below belongs to a distribution network (20 kV is provided in partial areas), the distribution network is a part of a whole power system directly connected with dispersed users, and the intelligent distribution network system integrates information of online data and offline data of the distribution network, data and user data of the distribution network, a power grid structure and a geographical graph by using modern electronic technology, communication technology, computer and network technology, so that the intellectualization of monitoring, protection, control, power utilization and distribution management under the normal operation and accident conditions of the distribution system is realized.
The power distribution automation system of the intelligent distribution network system consists of three parts, namely a main station, a communication system and an automation monitoring terminal device, and forms a complete information transmission and processing system to realize remote management of the operation of the distribution network.
The intelligent power distribution network faces a huge problem of how to quickly and accurately locate a fault section when a line fault, particularly a low-current ground fault occurs, the existing distribution network automation, feeder automation and traditional fault location technologies have the defects of large investment, power failure construction and low accuracy, an intelligent distribution network system cannot normally operate after power failure, the line fault cannot be monitored, and the intelligent distribution network system cannot be maintained conveniently after the fault.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a transient overhead line fault monitoring device which has the advantages of ensuring that a collecting unit can work continuously, being not easy to power off, being convenient for maintaining line faults, being capable of reducing the time for maintaining the lines, preventing data from being lost and the like, and solves the problems that the traditional intelligent power distribution network fault positioning technology is large in investment, needs power failure construction, is low in accuracy, cannot normally run after the intelligent distribution network system is powered off, cannot monitor the line faults and is not convenient to maintain after the intelligent distribution network system is in fault.
(II) technical scheme
In order to realize the purposes of ensuring that the collecting unit can work continuously, not being powered off easily, being convenient for maintaining line faults, reducing the line maintenance time and preventing data loss, the invention provides the following technical scheme: the utility model provides a transient state type overhead line fault monitoring device, includes the acquisition unit, collects unit, big data analysis platform, the acquisition unit includes protecting sheathing, the collector is installed to protecting sheathing's lower extreme, protecting sheathing's upper end movable mounting has the U-shaped arm, logical groove has been seted up to the lower extreme of U-shaped arm, the one end of U-shaped arm is provided with the jump ring, it includes the waterproof box to collect the unit, the upper end of waterproof box is provided with the apron, the both sides of waterproof box are provided with the support frame, solar panel is installed to the front end of support frame, the lower extreme of waterproof box is provided with the protection ground terminal, the inside of waterproof box is provided with the battery, big data analysis platform includes fault alarm module, system diagnosis, self-healing module, the continuous module of biography of data.
Preferably, wireless communication modules are arranged among the acquisition unit, the collection unit and the big data analysis platform, a signal port of the acquisition unit is connected with a signal port of the collection unit through the wireless communication modules, and a signal port of the big data analysis platform is connected with a signal port of the collection unit through the wireless communication modules.
Preferably, the collection unit comprises a GPS time service module and an information processing module, a signal port of the GPS time service module is connected with a signal port of the information processing module, a signal port of the system diagnosis and self-healing module is connected with a signal port of the big data analysis platform, and a signal port of the fault alarm module is connected with a signal port of the big data analysis platform.
Preferably, the outer surface of the upper end of the collector is fixedly connected with the outer surface of the lower end of the protective shell, a movable shaft is arranged between the other end of the U-shaped arm and the protective shell, the other end of the U-shaped arm is movably connected with the upper end of the protective shell through the movable shaft, and one end of the U-shaped arm is fixedly connected with the protective shell through a clamp spring.
Preferably, be provided with the fixed lock between the one end of waterproof box and sealing door, the one end of sealing door passes through fixed lock fixed connection with the front end of waterproof box, and installs the hinge between the other end of waterproof box and sealing door, the other end of sealing door passes through hinge swing joint with the waterproof box, the surface of waterproof box scribbles anticorrosive coating.
Preferably, a signal port of the data continuous transmission module is connected with a signal port of the big data analysis platform, the upper end of the protection grounding terminal is fixedly connected with the lower end of the waterproof box, an operation indicator lamp is arranged in front of the lower end of the waterproof box close to the protection grounding terminal, and the operation indicator lamp is fixedly connected with the waterproof box.
Preferably, the rear end of support frame and the surface fixed connection of waterproof box, the rear end surface of solar panel and the front end fixed connection of support frame, the contained angle between solar panel and the waterproof box is forty-five degrees, the support frame be two sets of, the support frame is about the central line axial symmetry of waterproof box, the lower extreme surface of apron and the upper end surface fixed connection of waterproof box.
Preferably, one side of the upper end cover plate of the waterproof box is provided with an antenna, a signal port of the antenna is connected with a signal port of the information processing module, and an input port of the information processing module is electrically connected with the solar power panel and an output port of the storage battery.
Preferably, the signal port of the information processing module is connected with the signal port of the big data analysis platform, the two ends of the waterproof box are provided with U-shaped hoop mounting plates, the U-shaped hoop mounting plates are welded with the waterproof box, and the U-shaped hoop mounting plates are made of stainless steel materials.
Advantageous effects
Compared with the prior art, the invention provides a transient overhead line fault monitoring device, which has the following beneficial effects:
1. the transient overhead line fault monitoring device adopts the solar power panel as a main power supply, and simultaneously adopts the maintenance-free rechargeable storage battery as a standby power supply, under the condition of power supply of the solar power panel, the solar power panel is preferentially used for supplying power, under the condition of no solar energy, the standby storage battery is used for supplying power, the standby storage battery can support the collection unit to continuously work for fifteen days, the built-in information processing module switches between the main power supply and the standby power supply according to the real-time monitoring result of the solar power panel and the storage battery, the collection unit can be ensured to continuously work, and the power can not be easily cut off.
2. This transient state type overhead line fault monitoring devices can carry out accurate detection and location to the trouble place through GPS time service module, and the staff can arrive the trouble place fast, is convenient for to the maintenance of circuit trouble, can reduce the time of circuit maintenance.
3. This transient state type overhead line fault monitoring device can send the early warning through the fault alarm module and remind the staff when the circuit fault to in overhaul the circuit, can detect big data analysis platform through system diagnosis, self-healing module, and can carry out self-service maintenance after detecting the trouble, can continue transmission data after the circuit outage switch-on through the module of continuing to pass data, prevent data loss.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural diagram of an acquisition unit of the present invention;
FIG. 3 is a schematic structural diagram of a collecting unit according to the present invention;
fig. 4 is a working principle diagram of the present invention.
In the figure: 1. a collection unit; 2. a collection unit; 3. a big data analysis platform; 4. a protective housing; 5. a collector; 6. a U-shaped arm; 7. a clamp spring; 8. a through groove; 9. a waterproof box; 10. a sealing door; 11. fixing a lock; 12. a U-shaped hoop mounting plate; 13. a cover plate; 14. a support frame; 15. a solar power panel; 16. a protection ground terminal; 17. an operation indicator light; 18. a wireless communication module; 19. a GPS time service module; 20. a fault alarm module; 21. a system diagnosis and self-healing module; 22. a data continuous transmission module; 23. and an information processing module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a transient overhead line fault monitoring device includes an acquisition unit 1, a collection unit 2, and a big data analysis platform 3, where the acquisition unit 1 includes a protective housing 4, a collector 5 is installed at the lower end of the protective housing 4, a U-shaped arm 6 is movably installed at the upper end of the protective housing 4, a through groove 8 is formed at the lower end of the U-shaped arm 6, a snap spring 7 is arranged at one end of the U-shaped arm 6, the collection unit 2 includes a waterproof box 9, a cover plate 13 is arranged at the upper end of the waterproof box 9, support frames 14 are arranged at two sides of the waterproof box 9, a solar power panel 15 is installed at the front end of the support frame 14, a protective grounding terminal 16 is arranged at the lower end of the waterproof box 9, a storage battery is arranged inside the waterproof box 9, and the big data analysis platform 3 includes a fault alarm module 20, a.
Wireless communication modules 18 are arranged among the acquisition unit 1, the collection unit 2 and the big data analysis platform 3, a signal port of the acquisition unit 1 is connected with a signal port of the collection unit 2 through the wireless communication module 18, and a signal port of the big data analysis platform 3 is connected with a signal port of the collection unit 2 through the wireless communication module 18.
The collection unit 2 comprises a GPS time service module 19 and an information processing module 23, a signal port of the GPS time service module 19 is connected with a signal port of the information processing module 23, a signal port of the system diagnosis and self-healing module 21 is connected with a signal port of the big data analysis platform 3, and a signal port of the fault alarm module 20 is connected with a signal port of the big data analysis platform 3.
The outer surface of the upper end of the collector 5 is fixedly connected with the outer surface of the lower end of the protective shell 4, a movable shaft is arranged between the other end of the U-shaped arm 6 and the protective shell 4, the other end of the U-shaped arm 6 is movably connected with the upper end of the protective shell 4 through the movable shaft, and one end of the U-shaped arm 6 is fixedly connected with the protective shell 4 through a clamp spring 7.
Be provided with fixed lock 11 between the one end of waterproof box 9 and sealing door 10, the one end of sealing door 10 passes through fixed lock 11 fixed connection with the front end of waterproof box 9, and installs the hinge between the other end of waterproof box 9 and sealing door 10, and the other end of sealing door 10 passes through hinge swing joint with waterproof box 9, and the surface of waterproof box 9 scribbles anticorrosive coating.
The signal port of the data continuous transmission module 22 is connected with the signal port of the big data analysis platform 3 to protect the upper end of the ground terminal 16 and the lower end of the waterproof box 9, the lower end of the waterproof box 9 is provided with an operation indicator 17 in front of the ground terminal 16, and the operation indicator 17 is fixedly connected with the waterproof box 9.
The rear end of the support frame 14 is fixedly connected with the outer surface of the waterproof box 9, the outer surface of the rear end of the solar power panel 15 is fixedly connected with the front end of the support frame 14, the included angle between the solar power panel 15 and the waterproof box 9 is forty-five degrees, the support frames 14 are divided into two groups, the support frames 14 are axisymmetric about the center line of the waterproof box 9, and the outer surface of the lower end of the cover plate 13 is fixedly connected with the outer surface of the upper end of the waterproof box 9.
An antenna is arranged on one side of an upper end cover plate 13 of the waterproof box 9, a signal port of the antenna is connected with a signal port of the information processing module 23, and an input port of the information processing module 23 is electrically connected with the solar power panel 15 and an output port of the storage battery.
The signal port of the information processing module 23 is connected with the signal port of the big data analysis platform 3, the two ends of the waterproof box 9 are provided with U-shaped hoop mounting plates 12, the U-shaped hoop mounting plates 12 and the waterproof box 9 are welded, and the U-shaped hoop mounting plates 12 are made of stainless steel materials.
When the device works, the U-shaped arm 6 is rotated through the movable shaft, the electric wire is clamped in the through groove 8, then the U-shaped arm 6 is fixed through the clamp spring 7, the protective shell 4 and the collector 5 are further installed on a line, the waterproof box 9 is fixed on a telegraph pole through the U-shaped hoop installation plate 12, the solar power panel 15 is installed at the front end of the waterproof box 9 through the support frame 14, the information processing module 23 is powered through the solar power panel 15 and the storage battery, the line information is collected through the collection unit 1, the information is transmitted to the collection unit 2 through the wireless communication module 18, the information sent out by the collection unit 1 is received through the antenna, the received information is processed through the information processing module 23, the information processed by the information processing module 23 is sent to the big data analysis platform 3 through the wireless communication module 18, and the specific condition of line detection can be displayed through the big data analysis platform 3, accurate detection and positioning can be carried out to the trouble place through GPS time service module 19, can detect big data analysis platform 3 through system diagnosis, self-healing module 21, and can carry out self-maintenance after detecting the trouble, can continue the transmission data after the circuit outage switch-on through data continuation module 22, prevent that data from losing, can fix sealing door 10 at the front end of waterproof box 9 through fixed lock 11, can show the operating condition who collects unit 2 through operation pilot lamp 17.
In summary, the solar power panel 15 is used as a main power supply, and the maintenance-free rechargeable storage battery is used as a standby power supply, when the solar power panel 15 supplies power, the solar power panel 15 is preferentially used for supplying power, when the solar power panel 15 does not supply power, the standby storage battery is used for supplying power, the standby storage battery can support the collection unit 2 to continuously work for fifteen days, and the built-in information processing module 23 switches between the main power supply and the standby power supply according to the real-time monitoring result of the solar power panel 15 and the storage battery, so that the collection unit 2 can continuously work and cannot be easily powered off; the fault location can be accurately detected and positioned through the GPS time service module 19, and workers can quickly arrive at the fault location, so that the line fault can be conveniently maintained, and the line maintenance time can be reduced; can send the early warning through fault alarm module 20 and remind the staff when the circuit trouble to overhaul the circuit, can detect big data analysis platform 3 through system diagnosis, self-healing module 21, and can carry out self-service maintenance after detecting the trouble, can continue transmission data through data continuation module 22 after the circuit outage switch-on, prevent that data from losing.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a transient state type overhead line fault monitoring device, includes acquisition unit (1), collects unit (2), big data analysis platform (3), its characterized in that: the collecting unit (1) comprises a protective shell (4), a collector (5) is installed at the lower end of the protective shell (4), a U-shaped arm (6) is movably installed at the upper end of the protective shell (4), a through groove (8) is formed in the lower end of the U-shaped arm (6), a clamp spring (7) is arranged at one end of the U-shaped arm (6), a collecting unit (2) comprises a waterproof box (9), a cover plate (13) is arranged at the upper end of the waterproof box (9), supporting frames (14) are arranged on two sides of the waterproof box (9), a solar power panel (15) is installed at the front end of each supporting frame (14), a protective grounding terminal (16) is arranged at the lower end of the waterproof box (9), a storage battery is arranged inside the waterproof box (9), and the big data analysis platform (3) comprises a fault alarm module (20) and a system diagnosis platform, The self-healing module (21) and the data continuous transmission module (22).
2. A transient type overhead line fault monitoring device according to claim 1, wherein: the device is characterized in that wireless communication modules (18) are arranged among the acquisition unit (1), the collection unit (2) and the big data analysis platform (3), a signal port of the acquisition unit (1) is connected with a signal port of the collection unit (2) through the wireless communication module (18), and a signal port of the big data analysis platform (3) is connected with a signal port of the collection unit (2) through the wireless communication module (18).
3. A transient type overhead line fault monitoring device according to claim 1, wherein: the collecting unit (2) comprises a GPS time service module (19) and an information processing module (23), a signal port of the GPS time service module (19) is connected with a signal port of the information processing module (23), a signal port of a system diagnosis and self-healing module (21) is connected with a signal port of a big data analysis platform (3), and a signal port of a fault alarm module (20) is connected with a signal port of the big data analysis platform (3).
4. A transient type overhead line fault monitoring device according to claim 1, wherein: the utility model discloses a collector, including collector (5), U-shaped arm (6), the upper end surface of collector (5) and the lower extreme fixed surface of protecting sheathing (4) are connected, be provided with the loose axle between the other end of U-shaped arm (6) and protecting sheathing (4), the upper end swing joint of the other end of U-shaped arm (6) through loose axle and protecting sheathing (4), and the one end of U-shaped arm (6) passes through jump ring (7) and protecting sheathing (4) fixed connection.
5. A transient type overhead line fault monitoring device according to claim 1, wherein: be provided with between the one end of waterproof box (9) and sealing door (10) fixed lock (11), the one end of sealing door (10) passes through fixed lock (11) fixed connection with the front end of waterproof box (9), and installs the hinge between the other end of waterproof box (9) and sealing door (10), the other end and the waterproof box (9) of sealing door (10) pass through hinge swing joint, the surface of waterproof box (9) scribbles anticorrosive coating.
6. A transient type overhead line fault monitoring device according to claim 1, wherein: the data transmission system is characterized in that a signal port of the data transmission module (22) is connected with a signal port of the big data analysis platform (3), the upper end of the protection grounding terminal (16) is fixedly connected with the lower end of the waterproof box (9), an operation indicator lamp (17) is arranged in front of the lower end of the waterproof box (9) close to the protection grounding terminal (16), and the operation indicator lamp (17) is fixedly connected with the waterproof box (9).
7. A transient type overhead line fault monitoring device according to claim 1, wherein: the rear end of support frame (14) and the surface fixed connection of waterproof box (9), the rear end surface of solar power panel (15) and the front end fixed connection of support frame (14), contained angle between solar power panel (15) and waterproof box (9) is forty-five degrees, support frame (14) are two sets of, support frame (14) are about the central line axis symmetry of waterproof box (9), the lower extreme surface of apron (13) and the upper end surface fixed connection of waterproof box (9).
8. A transient type overhead line fault monitoring device according to claim 1, wherein: one side of an upper end cover plate (13) of the waterproof box (9) is provided with an antenna, a signal port of the antenna is connected with a signal port of the information processing module (23), and an input port of the information processing module (23) is electrically connected with the solar power panel (15) and an output port of the storage battery.
9. A transient type overhead line fault monitoring device according to any one of claim 1, wherein: the signal port of information processing module (23) is connected with the signal port of big data analysis platform (3), the both ends of waterproof box (9) are provided with U type staple bolt mounting panel (12), be the welding between U type staple bolt mounting panel (12) and waterproof box (9), U type staple bolt mounting panel (12) are stainless steel material.
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| CN202010165361.7A CN111239551A (en) | 2020-03-11 | 2020-03-11 | Transient overhead line fault monitoring device |
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| CN112557809A (en) * | 2020-11-06 | 2021-03-26 | 国网河南省电力公司鹤壁供电公司 | Transmission line fault positioning device |
| CN114325242A (en) * | 2022-01-05 | 2022-04-12 | 潘力瑞 | Comprehensive fault positioning device for 10Kv distribution network line |
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| CN112557809A (en) * | 2020-11-06 | 2021-03-26 | 国网河南省电力公司鹤壁供电公司 | Transmission line fault positioning device |
| CN114325242A (en) * | 2022-01-05 | 2022-04-12 | 潘力瑞 | Comprehensive fault positioning device for 10Kv distribution network line |
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