CN115951175A - Distribution network overhead line insulation remote measurement and fault distance detection device - Google Patents
Distribution network overhead line insulation remote measurement and fault distance detection device Download PDFInfo
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- CN115951175A CN115951175A CN202211736053.0A CN202211736053A CN115951175A CN 115951175 A CN115951175 A CN 115951175A CN 202211736053 A CN202211736053 A CN 202211736053A CN 115951175 A CN115951175 A CN 115951175A
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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 invention provides a distribution network overhead line insulation remote measurement and fault distance detection device which comprises a shell assembly, a panel assembly and a detection assembly, wherein the shell assembly is used for providing accommodating space and outer side protection for the panel assembly and the detection assembly. The panel assembly comprises a plurality of detection interfaces and a display screen, and is used for connecting a detected cable and displaying result information. The detection assembly can detect insulation of a cable for positioning a fault point, can identify low-resistance faults and high-resistance faults and can position the faults, real insulation data of a line are quickly measured in the detection assembly in a contact mode to judge fault types, and the processing module controls the pulse generator to send detection signals to the detected cable and quickly calculate the distance between the fault point and the measurement point after receiving reflection signals of the converted fault point through the signal converter according to the line fault types. The distribution network overhead line insulation remote measurement and fault distance detection device provided by the invention is beneficial to improving the fault finding efficiency, is convenient to use on site and has accurate detection result.
Description
Technical Field
The invention relates to the technical field of power failure detection equipment, in particular to a distribution network overhead line insulation remote measurement and fault distance detection device.
Background
At present, fault patrol is carried out on distribution networks and transmission fault lines of a power supply office in a hot standby state, insulation of a pull branch line or a section switch telemetering line judges whether power transmission is available or not, safety risk is high in the search mode, repair and restoration time is long, time spent on soft fault search is long, 1-2 days are normally needed, and no better means is available for a maintenance worker of the power supply office except a traditional megger to judge the fault range of the distribution network lines. The overhead line is long, the branch is many, and the service life is overlength, and main gold utensil and subassembly are not reformed transform the change for a long time, and in case when ground fault takes place, fault point location is difficult to influence long duration and the power supply reliability of fault repair.
Disclosure of Invention
The invention provides a distribution network overhead line insulation remote measurement and fault distance detection device which is used for solving the technical problem of inconvenient fault detection of a power transmission line.
The invention provides a distribution network overhead line insulation remote measurement and fault distance detection device, which comprises:
the shell assembly comprises a box cover and a box body which are arranged in an opening and closing mode, and the box cover and the box body are encircled to form an accommodating space;
the panel assembly is arranged in the box body and comprises a plurality of detection interfaces and a display screen; the detection interface is used for connecting a tested cable, and the display screen displays result information;
the detection assembly is arranged in the accommodating space and comprises a pulse generator, a signal converter and a processing module; the pulse generator is connected with the tested cable and sends a detection signal to the tested cable through the detection interface; the signal converter is used for receiving a reflected signal returned by a fault point of the tested cable, converting the reflected signal into a digital signal and sending the digital signal to the processing module; and the processing module calculates result information according to the digital signal and sends the result information to the display screen.
In a possible implementation manner, the processing module is connected with the pulse generator, the processing module selects a corresponding code signal according to the measured cable parameter input into the processing module, and the pulse generator sends a detection signal to the measured cable according to the code signal.
In a feasible implementation manner, the result information includes sampling waveform parameters and a fault point distance of the tested cable, the digital signal is converted into time sequence lattice information after being processed by the processing module, and a control circuit of the display screen displays a time sequence lattice information conversion waveform image and the fault point distance on the display screen.
In one possible implementation manner, the display screen includes a distance measurement display screen and a liquid crystal display screen, the fault point distance is displayed on the distance measurement display screen, and the waveform image is displayed on the liquid crystal display screen.
In a possible implementation, the processing module records the time interval from the sending of the detection signal by the pulse generator to the receiving of the reflected signal, and calculates the distance of the fault point by combining the transmission speed of the pulse signal.
In a possible implementation manner, the detection assembly further includes an input circuit and a power supply, the input circuit is connected with the cable to be detected at the detection interface, receives a reflected signal returned by the cable to be detected, and inputs the reflected signal to the signal converter; the power supply is used for supplying power to the detection assembly.
In one possible implementation, the reflected signal is a transient analog signal, the signal converter includes an a/D converter and a memory, and the a/D converter converts the reflected signal into a digital signal that can be processed by the processing module and stores the digital signal in the memory.
In a possible implementation manner, the processing module includes a microprocessor, and the microprocessor is further provided with a communication port and a signal input/output port.
In a possible implementation manner, the panel assembly further includes a keyboard area, and the keyboard area is connected to the processing module and is configured to send a control instruction to the processing module.
In one possible implementation, the panel assembly further includes a wiring terminal area and a circuit control area, the wiring terminal area including the detection interface, the shield interface, and the ground interface; the circuit controller comprises a gain knob, a bidirectional switch and a selector switch.
The distribution network overhead line insulation remote measurement and fault distance detection device provided by the invention utilizes the shell assembly with the accommodating space to provide protection for the detection assembly and the panel assembly inside, and the device has portability. The display screen and the detection interface arranged on the panel component can detect the detected cable access device, and display the result through the display screen, so that the detection efficiency is improved. The detection assembly can detect the insulation of a cable for positioning a fault point, can identify low-resistance faults and high-resistance faults and can perform fault positioning. The distribution network overhead line insulation remote measurement and fault distance detection device provided by the invention is beneficial to improving the fault finding efficiency, is convenient to use on site, is simple to operate, is accurate in fault type detection, and is accurate in fault point identification.
Drawings
Fig. 1 is a schematic overall structure diagram of a distribution network overhead line insulation remote measurement and fault distance detection device;
FIG. 2 is a schematic view of a panel assembly;
fig. 3 is a schematic structural diagram of the detection assembly.
Description of the reference numerals:
100. a housing assembly; 200. a panel assembly; 300. a detection component;
101. a box cover; 102. a box body; 103. an accommodating space; 102a, a handle;
201. a terminal area; 202. a circuit control area; 203. a display area; 204. a charging interface; 205. an input socket; 206. a keyboard region;
201a, a detection interface; 201b, shielding the interface; 201c, a ground wire interface;
202a, a gain knob; 202b, a bidirectional switch; 202c, a switch;
203a and a distance measuring display screen; 203b, a liquid crystal display screen;
301. a processing module; 302. a pulse generator; 303. a signal converter; 304. an input circuit; 305. a power source;
303a, an a/D converter; 303b, and a memory.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the present invention will be described clearly and completely with reference to the drawings in the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort shall fall within the protection scope of the present application.
Fig. 1 is an overall structural schematic diagram of a distribution network overhead line insulation remote measurement and fault distance detection device; FIG. 2 is a schematic structural diagram of a panel assembly 200; fig. 3 is a schematic structural diagram of the detection assembly 300. As shown in fig. 1 to 3, the present embodiment provides a distribution network overhead line insulation telemetry and fault distance detection apparatus, which includes a housing assembly 100, a panel assembly 200, and a detection assembly 300.
Wherein, the housing assembly 100 is used for the housing assembly 100 to provide the accommodating space 103 and the outer protection for the panel assembly 200 and the detection assembly 300. As shown in fig. 1, the housing assembly 100 includes a cover 101 and a housing 102, which are opened and closed, and the cover 101 and the housing 102 enclose to form an accommodating space 103.
As shown in fig. 2, a panel assembly 200 is disposed in the housing 102 for connecting a cable to be tested and displaying result information. The panel assembly 200 includes a number of detection interfaces 201a and a display screen. The detection interface 201a is used for connecting a tested cable, and the display screen displays result information.
As shown in fig. 3, the detection assembly 300 can detect the insulation of the cable at the fault location point, identify a low resistance fault and a high resistance fault, and locate the fault. The detection assembly 300 is disposed in the accommodating space 103, and includes a pulse generator 302, a signal converter 303, and a processing module 301; the pulse generator 302 is connected with the tested cable and sends a detection signal to the tested cable through the detection interface 201 a; the signal converter 303 is configured to receive a reflected signal returned by a fault point of the cable to be detected, and the signal converter 303 converts the reflected signal into a digital signal and sends the digital signal to the processing module 301; the processing module 301 calculates result information according to the digital signal, and sends the result information to the display screen.
According to the distribution network overhead line insulation remote measurement and fault distance detection device, the shell assembly 100 with the accommodating space 103 is used for protecting the detection assembly 300 and the panel assembly 200 inside, and the device is portable. The display screen and the detection interface 201a arranged on the panel assembly 200 can detect the detected cable access device, and display the result through the display screen, so that the detection efficiency is improved. The detection component 300 judges the fault type by contact-type rapid measurement of real insulation data of the line, the processing module 301 controls the pulse generator 302 to send a detection signal to the detected cable according to the line fault type, and after receiving a reflection signal of a conversion fault point through the signal converter 303, the processing module rapidly calculates the distance from the fault point to the measurement point, and the detection component 300 can detect insulation of the cable with the fault point positioned, can identify low-resistance faults and high-resistance faults, and can perform fault positioning. The distribution network overhead line insulation remote measurement and fault distance detection device provided by the invention is beneficial to improving the fault finding efficiency, is convenient to use on site, is simple to operate, is accurate in fault type detection, and is accurate in fault point identification.
As shown in fig. 2, the processing module 301 in this embodiment is connected to the pulse generator 302, the processing module 301 selects a corresponding encoding signal according to a parameter of the cable to be tested input therein, the pulse generator 302 sends a detection signal to the cable to be tested according to the encoding signal, and the parameter of the cable to be tested includes information such as a resistance value, a line diameter voltage level, and the like. The pulse generator 302 automatically forms a logic pulse with a certain width according to the coding signal of the processing module 301, and the pulse is converted into a transmission pulse with a high amplitude value by the transmission circuit and sent to the tested cable.
When a 10kV overhead transmission line is permanently grounded (short circuited) or broken (open circuited), the fault type is judged by contact type rapid measurement of real insulation data of the line, according to the line fault type, the processing module 301 can select a pulse method or a flashover method to measure the distance from a fault point to a measurement point, if the resistance value of the measured cable is low (such as less than 100 ohms), a pulse method is used to transmit low-voltage pulses to the measured cable, and reflected pulse signals sent by the fault point are collected. If the resistance value of the tested cable is higher, high-voltage pulse is transmitted to the tested cable by using a flashover method, and a reflected pulse signal sent by a fault point is collected.
The result information comprises sampling waveform parameters and the distance of a fault point of the tested cable, the digital signal is converted into time sequence lattice information after being processed by the processing module 301, and a control circuit of the display screen displays a time sequence lattice information conversion waveform image and the distance of the fault point on the display screen. The fault reason can be seen according to the waveform image, and the calculated fault point distance is convenient to position.
As shown in fig. 2, the panel assembly 200 is provided with a display area 203, and the display screen of the display includes a distance measurement display screen 203a and a liquid crystal display screen 203b, the distance of the fault point is displayed on the distance measurement display screen 203a, and the waveform image is displayed on the liquid crystal display screen 203 b.
The processing module 301 records the time interval from the sending of the detection signal by the pulse generator 302 to the receiving of the reflected signal, and calculates the distance of the fault point by combining the transmission speed of the pulse signal.
The pulse generator 302 sends out a pulse wave, the pulse wave is sent to the fault phase of the cable through the lead, the pulse wave is transmitted along the wire core of the tested cable, when the pulse wave is transmitted to the fault point, a pulse signal is reflected back because the wave resistance of the cable at the fault point changes, the processing module 301 records the time interval between the pulse sending and the pulse reflecting at the test end, and the distance between the test end and the fault point can be calculated.
The processing module 301 comprises a microprocessor, the microprocessor is further provided with a communication port and a signal input/output port, and the completed digital processing task comprises: data collection, storage, digital filtering, cursor movement, distance calculation, graph comparison and image scale expansion until the data is sent to a liquid crystal display and a distance measuring display. The communication port can be connected with a PC, and can transmit meeting result information in real time.
As shown in fig. 3, the detection assembly 300 further includes an input circuit 304 and a power supply 305, the input circuit 304 is connected to the cable to be detected at the detection interface 201a, receives the reflected signal returned by the cable to be detected, and inputs the reflected signal to the signal converter 303; the input circuit 304 is used for amplifying the reflected pulse signal returned by the tested cable, and the power supply 305 is used for supplying power to the microprocessor, the pulse generator 302 and the signal converter 303.
Since the reflected signal emitted from the fault point is a transient analog signal, as shown in fig. 3, the signal converter 303 includes an a/D converter 303a and a memory 303b, the a/D converter 303a converts the reflected signal into a digital signal that can be processed by the processing module 301, and stores the digital signal in the memory 303b, and the microprocessor fetches data from the memory 303b according to a processing cycle to perform calculation.
As shown in fig. 2, the panel assembly 200 further includes a keypad area 206, and the keypad area 206 is connected to the processing module 301 and configured to send a control command to the processing module 301. The keyboard area 206 is a window for man-machine interaction, and an operator can input commands to the computer through the keyboard area 206 according to test requirements, and then the computer control device can complete a certain test function.
In addition, as shown in fig. 2, the panel assembly 200 further includes a terminal area 201 and a circuit control area 202, the terminal area includes the detection interface 201a, the shield interface 201b, and the ground interface 201c; when the cable to be detected cannot be normally detected due to large leakage interference, the cable to be detected is inserted into the shielding interface 201b, and the shielding interface 201b can effectively shield the interference of leakage. The circuit controller includes a gain knob 202a, a bi-directional switch 202b, and a switch 202c, which can be used to adjust the gain magnitude of the input circuit 304, change the feeding direction of the pulse generator 302, and switch the operation mode of the detection assembly 300, respectively.
In addition, a charging interface 204 is provided on the panel assembly 200 for charging a power source 305, and an input socket 205 is also provided for providing a data transmission function.
The distribution network overhead line insulation remote measurement and fault distance detection device provided in the embodiment is lighter than a direct current trial delivery instrument, and due to the fact that leakage current is not higher than 90mA in design, the distribution network overhead line insulation remote measurement and fault distance detection device is more accurate and safer than a traditional direct current trial delivery instrument, and meanwhile, the absorption ratio and the plan index can be automatically calculated. The pulse module is added, the last section of fault position can be accurately judged, and the fault detection is accurate to within one meter. The device has extremely strong anti-interference capability. The hardware response speed is fast, and the signals of the equipment with poor insulation can be quickly checked. By using the latest microcomputer control technology and adopting a high-performance shielding protection element, the high-performance shielding protection device has high anti-interference capability and can operate in a strong magnetic field environment.
It is understood that a person skilled in the art can combine, split, recombine and the like the embodiments of the present application to obtain other embodiments on the basis of several embodiments provided by the present application, and the embodiments do not depart from the scope of the present application.
The above embodiments are only for illustrating the embodiments of the present invention and are not to be construed as limiting the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the embodiments of the present invention shall be included in the scope of the present invention.
Claims (10)
1. The utility model provides a join in marriage insulating telemetering measurement of net aerial conductor and fault distance detection device which characterized in that includes:
the box cover assembly comprises a shell assembly (100) and a cover assembly, wherein the shell assembly comprises a box cover (101) and a box body (102) which are arranged in an opening and closing mode, and an accommodating space (103) is formed by the box cover (101) and the box body (102) in an enclosing mode;
the panel assembly (200) is arranged in the box body (102) and comprises a plurality of detection interfaces (201 a) and a display screen; the detection interface (201 a) is used for connecting a tested cable, and the display screen displays result information;
the detection assembly (300) is arranged in the accommodating space (103) and comprises a pulse generator (302), a signal converter (303) and a processing module (301); the pulse generator (302) is connected with the tested cable and sends a detection signal to the tested cable through the detection interface (201 a); the signal converter (303) is used for receiving a reflected signal returned by a fault point of the tested cable, and the signal converter (303) converts the reflected signal into a digital signal and sends the digital signal to the processing module (301); and the processing module (301) calculates result information according to the digital signal and sends the result information to the display screen.
2. The apparatus for telemetry and fault distance detection of insulation of distribution network overhead line according to claim 1, wherein the processing module (301) is connected to the pulse generator (302), the processing module (301) selects a corresponding code signal according to the parameter of the cable to be detected inputted therein, and the pulse generator (302) sends out a detection signal to the cable to be detected according to the code signal.
3. The distribution network overhead line insulation telemetry and fault distance detection device of claim 1, wherein the result information includes sampled waveform parameters and fault point distances of the cable to be detected, the digital signal is converted into time sequence lattice information after being processed by the processing module (301), and a control circuit of the display screen displays a time sequence lattice information conversion waveform image and the fault point distances on the display screen.
4. The distribution network overhead line insulation telemetry and fault distance detection device of claim 3, wherein the display screen comprises a ranging display screen (203 a) and a liquid crystal display screen (203 b), wherein the fault point distance is displayed on the ranging display screen (203 a), and the waveform image is displayed on the liquid crystal display screen (203 b).
5. The distribution network overhead line insulation telemetry and fault distance detection apparatus of any of claims 1-4, wherein the processing module (301) records a time interval from the pulse generator (302) sending out a detection signal to the receiving of a reflected signal, and calculates the distance of the fault point in combination with a pulse signal transmission speed.
6. The distribution network overhead line insulation telemetry and fault distance detection apparatus of claim 5, wherein the detection assembly (300) further comprises an input circuit (304) and a power supply (305), the input circuit (304) is connected with the cable to be detected at the detection interface (201 a), receives a reflected signal returned by the cable to be detected and inputs the reflected signal to the signal converter (303); the power source (305) is used for supplying power to the detection assembly (300).
7. The apparatus of claim 6, wherein the reflected signal is a transient analog signal, wherein the signal converter (303) comprises an A/D converter (303 a) and a memory (303 b), and wherein the A/D converter (303 a) converts the reflected signal into a digital signal that can be processed by the processing module (301) and stores the digital signal in the memory (303 b).
8. Distribution network overhead line insulation telemetry and fault distance detection device according to claim 6 or 7, characterized in that the processing module (301) comprises a microprocessor, which is further provided with a communication port and a signal input output port.
9. Distribution network overhead line insulation telemetry and fault distance detection device according to any of claims 1-4, 6 or 7, characterized in that the panel assembly (200) further comprises a keypad area (206), the keypad area (206) being connected to the processing module (301) for sending control instructions to the processing module (301).
10. The distribution network overhead line insulation telemetry and fault distance detection device of claim 9, wherein the panel assembly (200) further comprises a terminal area (201) and a circuit control area (202), the terminal area (201) comprising the detection interface (201 a), a shield interface (201 b), and a ground interface (201 c); the circuit controller includes a gain knob (202 a), a bi-directional switch (202 b), and a diverter switch (202 c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211736053.0A CN115951175A (en) | 2022-12-30 | 2022-12-30 | Distribution network overhead line insulation remote measurement and fault distance detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211736053.0A CN115951175A (en) | 2022-12-30 | 2022-12-30 | Distribution network overhead line insulation remote measurement and fault distance detection device |
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| Publication Number | Publication Date |
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| CN115951175A true CN115951175A (en) | 2023-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211736053.0A Pending CN115951175A (en) | 2022-12-30 | 2022-12-30 | Distribution network overhead line insulation remote measurement and fault distance detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116626445A (en) * | 2023-07-04 | 2023-08-22 | 四川天中星航空科技有限公司 | Cable fault detection system and method |
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2022
- 2022-12-30 CN CN202211736053.0A patent/CN115951175A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116626445A (en) * | 2023-07-04 | 2023-08-22 | 四川天中星航空科技有限公司 | Cable fault detection system and method |
| CN116626445B (en) * | 2023-07-04 | 2024-02-27 | 四川天中星航空科技有限公司 | Cable fault detection system and method |
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