CN108896786B - Fault warning device and fault warning system - Google Patents
Fault warning device and fault warning system Download PDFInfo
- Publication number
- CN108896786B CN108896786B CN201811118386.0A CN201811118386A CN108896786B CN 108896786 B CN108896786 B CN 108896786B CN 201811118386 A CN201811118386 A CN 201811118386A CN 108896786 B CN108896786 B CN 108896786B
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- Prior art keywords
- liquid
- fault warning
- cavity
- fault
- warning device
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- 239000007788 liquid Substances 0.000 claims abstract description 71
- 239000004020 conductor Substances 0.000 claims abstract description 29
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000001054 red pigment Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
-
- 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
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
-
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The embodiment of the invention discloses a fault warning device and a fault warning system, wherein the device comprises a cavity filled with liquid and a liquid pipe communicated with the cavity, and the device comprises: the cavity is surrounded by two electric conductors arranged up and down, and the thickness of a first electric conductor arranged at the upper end is greater than that of a second electric conductor arranged at the lower end. The embodiment of the invention provides the fault warning device and the fault warning system, which can accurately position the power grid in time when a line short circuit fault occurs, have a good auxiliary effect on the rush repair of field maintenance personnel after the fault occurs, are beneficial to improving the safety and the stability of the power transmission line, not only shorten the power failure time, but also lighten the labor intensity of the maintenance personnel, and have good popularization and application prospects.
Description
Technical Field
The embodiment of the invention relates to the technical field of power electronics, in particular to a fault warning device and a fault warning system.
Background
With the rapid development of industrial economy in China, the demand for electric power is rapidly increased, and the demand for reliable electric power supply is also increasing. The power electronic transformer is used as one of main equipment of a substation and a power plant in a power grid, so that the voltage can be raised to enable electric energy to be sent to an electricity utilization area with lower loss, the voltage is reduced to each level of use voltage, the electricity utilization needs of different users are met, and when the power grid and the equipment are in abnormal conditions, protection is needed in time, and the electric energy transmission and the switch disconnection are stopped; however, when a line short circuit occurs in the power grid or the equipment, the relay protection device cannot collect the overcurrent signal due to the instant blocking of the power electronic voltage device, so that a short circuit fault point cannot be found, and the abnormality cannot be cleared from the power grid.
Disclosure of Invention
The invention provides a fault warning device and a fault warning system, which are used for solving the defects in the prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
in a first aspect, an embodiment of the present invention provides a fault warning device, including a cavity filled with a liquid and a liquid pipe in communication with the cavity, wherein:
the cavity is surrounded by two electric conductors arranged up and down, and the thickness of a first electric conductor arranged at the upper end is greater than that of a second electric conductor arranged at the lower end.
Further, in the fault warning device, an insulating coating is arranged on the inner wall of the cavity.
Further, in the fault warning device, a fault warning scale mark is arranged on the outer wall of the liquid pipe.
Further, in the fault warning device, a necking structure for preventing liquid from flowing back is arranged at the part of the liquid pipe located in the cavity.
Further, in the fault warning device, the necking structure comprises a stay boss and a liquid flow channel;
the liquid flow channel is formed between the outer wall of the stay point protrusion and the inner wall of the liquid pipe.
Further, in the fault warning device, the flow area of the liquid flow channel is smaller than the flow area of the liquid pipe.
Further, in the fault warning device, the cavity and the liquid pipe are of an integrated structure or an assembled sealing connection structure.
In a second aspect, an embodiment of the present invention provides a fault warning system, including an electric circuit and the fault warning device described in the first aspect, where the fault warning device is installed on a live wire at an output end of the electric circuit;
when the power consumption circuit is short-circuited, the fault warning device is provided with current, the second conductor is deformed under the action of electric force, and then liquid in the cavity is extruded into the liquid pipe, so that the liquid in the liquid pipe is lifted to a fault warning scale mark.
The embodiment of the invention provides the fault warning device and the fault warning system, which can accurately position the power grid in time when a line short circuit fault occurs, have a good auxiliary effect on the rush repair of field maintenance personnel after the fault occurs, are beneficial to improving the safety and the stability of the power transmission line, not only shorten the power failure time, but also lighten the labor intensity of the maintenance personnel, and have good popularization and application prospects.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a fault warning device according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a fault warning system according to a second embodiment of the present invention.
Reference numerals:
the device comprises a cavity 100, a liquid pipe 200, a first conductor 101, a second conductor 102, a fault warning device 300 and an electric line 400.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Example 1
Fig. 1 is a schematic structural diagram of a fault warning device according to an embodiment of the invention. As shown in fig. 1, the fault warning device provided by the embodiment of the invention can solve the problem that the short-circuit tripping position of the power line cannot be quickly and accurately found in the prior art.
The fault warning device comprises a cavity 100 filled with liquid and a liquid pipe 200 communicated with the cavity 100, wherein:
the cavity 100 is surrounded by two electrical conductors arranged up and down, and the thickness of the first electrical conductor 101 arranged at the upper end is greater than that of the second electrical conductor 102 arranged at the lower end.
The electric conductor is metal with good electric conductivity such as copper, and an insulating coating is arranged on the inner wall of the cavity 100, so that the inner wall of the cavity 100 is insulated, and the influence on the accuracy of fault checking due to heating of the device caused by liquid electric conductivity can be prevented.
Optionally, the cavity 100 and the liquid tube 200 are integrally formed or assembled and sealed.
The outer wall of the liquid pipe 200 is provided with fault warning graduation marks. Generally, when a short-circuit fault is overhauled, the point can be estimated to be the occurrence point of the short-circuit fault as long as the liquid level of the liquid pipe 200 in the device is found to rise to the fault warning scale mark. However, it should be noted that a plurality of fault warning devices may be installed at output ends at different positions in the power grid line, and only the first device for lifting the liquid level of the liquid pipe 200 to the fault warning scale mark needs to be found during maintenance, so that the point can be estimated as a fault occurrence point.
On one hand, considering that the liquid expansion and contraction change caused by temperature change can influence the liquid level lifting height of the liquid so as to interfere the diagnosis result, the embodiment of the invention adopts the liquid with low thermal expansion coefficient; on the other hand, in order to facilitate the observation, a bright-colored and visually-noticeable pigment, such as a red pigment, is added to the liquid having a low thermal expansion coefficient.
In one embodiment, preferably, the portion of the liquid pipe 200 located in the cavity 100 is provided with a constriction structure for preventing liquid from flowing back.
Specifically, the necking structure comprises a stay boss and a liquid flow passage; the retaining protrusion and the inner wall of the liquid pipe 200 are integrally formed, and the portion of the liquid pipe 200 to be provided with the necking structure is heated to form the liquid flow passage, and the liquid flow passage is formed between the outer wall of the retaining protrusion and the inner wall of the liquid pipe 200, and the flow passage area of the liquid flow passage is smaller than the flow passage area of the liquid pipe 200. The area of the liquid flowing through is reduced when the liquid passes through the liquid flow channel and the point-leaving protrusion, so that the liquid cannot flow back after passing through the liquid flow channel and the point-leaving protrusion, the liquid level is prevented from falling back when the cavity 100 is reset due to lack of electric power, and the accuracy of measurement reading is ensured.
Another major factor affecting safe operation and normal operation of the electrical equipment is the electromotive force borne by the conductor, and the current-carrying part (conductor) of the fault warning device is subjected to the electromotive force when a current passes through, that is, the electromagnetic force borne by the current-carrying conductor in the alternating magnetic field. Under normal working conditions, a certain distance is kept between the first conductor 101 and the second conductor 102, the working current flowing through the first conductor 101 is not large, the electromagnetic force received by the first conductor 102 is not large, but when a circuit short circuit occurs, the circuit generates an overcurrent phenomenon, the impact current can pass through the conductors, the electromotive force received by the conductors is maximum, the first conductor 101 cannot deform due to thicker thickness, the second conductor 102 can deform due to thinner thickness, and the first conductor 101 is sucked and extruded into the cavity 100 to generate a maximum extrusion force; the liquid pipe 200 is communicated with the cavity 100, and when the cavity 100 is filled with liquid in a squeezing mode, the liquid level of the liquid pipe 200 can be lifted to a fault warning scale mark.
The embodiment of the invention provides the fault warning device, which can accurately position the power grid in time when a line short-circuit fault occurs, has a good auxiliary effect on the rush repair of field maintenance personnel after the fault occurs, is beneficial to improving the safety and stability of the power transmission line, shortens the power failure time, lightens the labor intensity of the maintenance personnel, and has good popularization and application prospects.
Example two
Referring to fig. 2, an embodiment of the present invention provides a fault warning system, which includes a power line 400 and a fault warning device 300 provided in an embodiment of the present invention, where the fault warning device is installed on a live wire at an output end of the power line 400;
when the power consumption line 400 is shorted, the fault warning device 300 has an impact current passing through, and the second conductive body 102 is deformed by the action of the electric force, so that the liquid in the cavity 100 is extruded into the liquid pipe 200, so that the liquid in the liquid pipe 200 is lifted to the fault warning scale mark.
The embodiment of the invention provides a fault warning system, which can accurately position a power grid in time when a line short-circuit fault occurs, has a good auxiliary effect on the rush repair of field maintenance personnel after the fault occurs, is beneficial to improving the safety and stability of a power transmission line, shortens the power failure time, lightens the labor intensity of the maintenance personnel, and has good popularization and application prospects.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a fault warning device, its characterized in that, fault warning device installs on the live wire of the output of power consumption circuit, including the cavity that is filled with liquid and with the liquid pipe of cavity intercommunication, wherein:
the cavity is surrounded by two conductors arranged up and down, and the thickness of a first conductor arranged at the upper end is larger than that of a second conductor arranged at the lower end;
when the power consumption line is short-circuited, the fault warning device is provided with current, the second electric conductor is deformed under the action of electric force, and then liquid in the cavity is extruded into the liquid pipe, so that the liquid in the liquid pipe is lifted.
2. The fault alerting device of claim 1, wherein an inner wall of the cavity is provided with an insulating coating.
3. The fault warning device of claim 1, wherein the outer wall of the liquid tube is provided with fault warning graduation marks.
4. The fault alerting device of claim 1, wherein the portion of the liquid tube located within the cavity is provided with a constriction structure that prevents liquid backflow.
5. The fault alerting device of claim 4, wherein the constriction structure comprises a stay boss and a liquid flow channel;
the liquid flow channel is formed between the outer wall of the stay point protrusion and the inner wall of the liquid pipe.
6. The fault alerting device of claim 5, wherein the flow area of the liquid flow channel is smaller than the flow area of the liquid tube.
7. The device of claim 1, wherein the cavity and the liquid tube are integrally formed or assembled in a sealed connection.
8. A fault warning system comprising an electrical line and a fault warning device as claimed in any one of claims 1 to 7, the fault warning device being mounted on a fire wire at the output of the electrical line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811118386.0A CN108896786B (en) | 2018-09-20 | 2018-09-20 | Fault warning device and fault warning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811118386.0A CN108896786B (en) | 2018-09-20 | 2018-09-20 | Fault warning device and fault warning system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108896786A CN108896786A (en) | 2018-11-27 |
| CN108896786B true CN108896786B (en) | 2023-08-01 |
Family
ID=64360279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811118386.0A Active CN108896786B (en) | 2018-09-20 | 2018-09-20 | Fault warning device and fault warning system |
Country Status (1)
| Country | Link |
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| CN (1) | CN108896786B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111736095B (en) * | 2020-07-23 | 2021-11-02 | 广东电网有限责任公司 | Short-circuit fault detection device |
Citations (7)
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|---|---|---|---|---|
| CN2898846Y (en) * | 2006-05-26 | 2007-05-09 | 赵红羽 | Short-circuit and grounded-fault indicator |
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| JP2009251073A (en) * | 2008-04-02 | 2009-10-29 | Tomoegawa Paper Co Ltd | Display element, display element laminate, display, and method for driving display element |
| CN203611975U (en) * | 2013-09-29 | 2014-05-28 | 江苏理工学院 | Piezoelectric type hydraulic control valve, hydraulic braking system and automobile electro-hydraulic line control braking system |
| CN204581666U (en) * | 2015-04-13 | 2015-08-26 | 华南理工大学 | With the Chargeable heat water bag of baroceptor |
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| US7527363B2 (en) * | 2004-07-16 | 2009-05-05 | Fujifilm Corporation | Discharge head of image forming apparatus with piezoelectric body for generating and sensing pressure |
| EP1965422A4 (en) * | 2005-12-22 | 2012-03-07 | Jsr Corp | Circuit board apparatus for wafer inspection, probe card, and wafer inspection apparatus |
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2018
- 2018-09-20 CN CN201811118386.0A patent/CN108896786B/en active Active
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|---|---|---|---|---|
| CN2898846Y (en) * | 2006-05-26 | 2007-05-09 | 赵红羽 | Short-circuit and grounded-fault indicator |
| CN101042952A (en) * | 2007-04-27 | 2007-09-26 | 甘立刚 | Varistor with novel short-circuit protection device |
| CN101051746A (en) * | 2007-05-14 | 2007-10-10 | 甘立刚 | Closed mode overheat protective technology |
| JP2009251073A (en) * | 2008-04-02 | 2009-10-29 | Tomoegawa Paper Co Ltd | Display element, display element laminate, display, and method for driving display element |
| CN203611975U (en) * | 2013-09-29 | 2014-05-28 | 江苏理工学院 | Piezoelectric type hydraulic control valve, hydraulic braking system and automobile electro-hydraulic line control braking system |
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| Publication number | Publication date |
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| CN108896786A (en) | 2018-11-27 |
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