CN109507528A - A kind of 10kV overhead transmission line lightning-caused breaking warning device based on fault current detection - Google Patents
A kind of 10kV overhead transmission line lightning-caused breaking warning device based on fault current detection Download PDFInfo
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- CN109507528A CN109507528A CN201811359165.2A CN201811359165A CN109507528A CN 109507528 A CN109507528 A CN 109507528A CN 201811359165 A CN201811359165 A CN 201811359165A CN 109507528 A CN109507528 A CN 109507528A
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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
- 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
- G01R31/58—Testing of lines, cables or conductors
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Abstract
This application discloses a kind of 10kV overhead transmission line lightning-caused breaking warning device based on fault current detection, comprising: current detecting unit, control unit, trigger circuit and alarm unit；Current detecting unit is used to detect the conveying electric current of overhead line road；The input terminal of control unit is connected to the output end of current detecting unit, the output end of control unit is connected to trigger circuit, the output end of trigger circuit is connected to alarm unit, control unit is configured as when determining that conveying electric current is greater than or equal to default short circuit current, start timing unit, it is additionally configured to after the completion of timing unit timing, when determining that conveying electric current is greater than or equal to default earth-fault current, control trigger circuit generates trigger signal；Alarm unit is used to generate warning message according to trigger signal.By the technical solution in the application, the reliability and accuracy of lightning-caused breaking detection are improved, a possibility that overvoltage causes false alarm is reduced, is conducive to repairing and fast recovery of power supply.
Description
Technical field
This application involves the technical fields of lightning-caused breaking detection, in particular to a kind of based on fault current detection
10kV overhead transmission line lightning-caused breaking warning device.
Background technique
China's distribution network transmission line generallys use suspended insulated guide wire at present, the suspended insulated guide wire pole under Thunderstorm Weather
Lightning-caused breaking accident easily occurs.The process of lightning-caused breaking can be divided into two stages: first stage is that lightning surge breakdown is led
Line insulating layer, conducting wire discharge over the ground, but since lightning current action time is short, only Microsecond grade, and energy is small, and conducting wire will not be burnt at this time
It is disconnected.Second stage is that system power-frequency voltage is applied on thunder discharge ionization channels, since insulating layer breakdown is some power frequency
Electric arc generates excessive temperature and blows conducting wire in this point sustained combustion.It is straight that power frequency short circuit current in certain point builds arc sustained combustion
To blowing route.System short-circuit electric current is related with system operation mode, the short circuit current of solidly grounded system up to kilo-ampere,
It will cause overcurrent protection movement, line disconnection；For connecing grounding through arc mode, single-phase earth fault current using central point
Electric current is likely less than 10A, allows the 2h that operates with failure at this time, i.e., system continues to run after broken string ground connection, at this time by disconnected
The personnel in line landing region may have Danger Electric shock risk.Need to alarm and determine to repair personnel in time accident area, convenient for quick
Repairing, removes a hidden danger.
In the prior art, arrester or anti-lightning strike break wire device are usually installed additional, it is disconnected to prevent overhead transmission line lightning stroke
Based on line, but do not account at this time if cannot timely and effectively alarm, not only expending it is possible to lightning-caused breaking situation occurs
Manpower and material resources search accident point, extend maintenance time, reduce power supply reliability, while personal safety accident may occur.
Summary of the invention
The purpose of the application is: to 10kV overhead transmission line because lightning stroke causes broken string to judge, improving break alarm
Accuracy and timeliness, reduce because overhead transmission line broken string neighbouring personnel are damaged a possibility that.
The technical solution of the application is: providing a kind of 10kV overhead transmission line lightning-caused breaking report based on fault current detection
Alarm device, the wire break alarm device include: current detecting unit, control unit, trigger circuit and alarm unit；Current detecting
Unit includes current transformer, and overhead transmission line passes through current transformer, and current detecting unit is for detecting the defeated of overhead line road
Power transmission stream；The input terminal of control unit is connected to the output end of current detecting unit, and the output end of control unit is connected to triggering
Circuit, the output end of trigger circuit are connected to alarm unit, and control unit includes timing unit, and control unit, which is configured as working as, to be sentenced
Surely when conveying electric current is greater than or equal to default short circuit current, start timing unit, control unit is additionally configured in timing unit
After the completion of timing, when determining that conveying electric current is greater than or equal to default earth-fault current, control trigger circuit generates triggering letter
Number；Alarm unit is used to generate warning message, wherein warning message includes photoelectric alarm information, sound report according to trigger signal
Alert information and location coordinate information.
In any of the above-described technical solution, further, after control unit starts timing unit, it is additionally configured to, when sentencing
Surely when output electric current is greater than default leakage current, control timing unit stops timing.
In any of the above-described technical solution, further, alarm unit is specifically included: acousto-optic warning unit and coordinate
Transmitting unit；Acousto-optic warning unit includes warning lamp and buzzer, and acousto-optic warning unit is used to generate photoelectricity according to trigger signal
Warning message and sound warning message；Coordinate transmitting unit is used to send location coordinate information, position coordinates according to trigger signal
Information is the number of the affiliated shaft tower of wire break alarm device.
In any of the above-described technical solution, further, further includes: taking online can module and energy-storage units；Energy is taken online
Module is set between current transformer and energy-storage units；Energy-storage units include sequentially connected AC/DC conversion module, filtering mould
Block, Voltage stabilizing module and energy-storage battery group, AC/DC conversion module are set to the input terminal of energy-storage units, the setting of energy-storage battery group
In the output end of energy-storage units, the output end of energy-storage units is connected to the power supply of the feeder ear of current detecting unit, control unit
The feeder ear of end and alarm unit, energy-storage units are used to carry out electric energy storage according to the energy storage electric current for taking energy module to generate online
It can, power.
In any of the above-described technical solution, further, further includes: protection circuit unit；Protection circuit unit is set to
Between online taking energy unit and energy-storage units, protection circuit unit includes three concatenation modules and ceramic gas discharge tube, concatenation
Module includes concatenated varistor and temperature safety tube, wherein the first end of the first concatenation module is connected to takes energy mould online
Between the feeder ear of block and the input terminal of energy-storage units, the second end of the first concatenation module is connected to the of ceramic gas discharge tube
One end, the second end of ceramic gas discharge tube are connected to the ground terminal of energy-storage units, the second concatenation module and third concatenation module
After series connection, it is parallel to the both ends of the first concatenation module.
In any of the above-described technical solution, further, further includes: relief means；Relief means are set to
The outside of wire break alarm device, buffer unit are used to slow down wire break alarm device when overhead transmission line broken string and make impact with the ground production
Raw impact.
In any of the above-described technical solution, further, wire break alarm device is installed on two of insulator on overhead transmission line
Side, the distance between wire break alarm device and insulator are 230mm to 270mm.
The beneficial effect of the application is: the conveying electric current of overhead transmission line detected by the way that current detecting unit is arranged,
And conveying electric current is judged by control unit, overhead transmission line is detected because breaking caused by lightning stroke with realizing, is improved
The reliability and accuracy of lightning-caused breaking detection, reduce a possibility that overvoltage causes false alarm, improve lightning-caused breaking
Maintenance efficiency, be conducive to repairing and fast recovery of power supply, by be arranged alarm unit, to overhead transmission line broken string alarm,
The personnel passed through are prompted, a possibility that leading to personnel contact because of broken string is reduced, it is therefore prevented that contingency occurs, and improves distribution
The safety of net transmission line of electricity.
The application carries out influence electricity by the way that online energy taking device is arranged, using the conveying electric current of overhead transmission line, in order to
Wire break alarm device is powered, the operation steady in a long-term of wire break alarm device is conducive to, by the way that filter module, pressure stabilizing is arranged
Module and energy-storage module improve wire break alarm device reliability of operation and stability.
Detailed description of the invention
The advantages of above-mentioned and/or additional aspect of the application, will become bright in combining description of the following accompanying drawings to embodiment
It shows and is readily appreciated that, in which:
Fig. 1 is the 10kV overhead transmission line lightning-caused breaking report based on fault current detection according to one embodiment of the application
The schematic block diagram of alarm device；
Fig. 2 is the schematic diagram according to the wire break alarm device installation site of one embodiment of the application.
Specific embodiment
It is with reference to the accompanying drawing and specific real in order to be more clearly understood that the above objects, features, and advantages of the application
Mode is applied the application is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, many details are elaborated in order to fully understand the application, still, the application may be used also
To be implemented using other than the one described here other modes, therefore, the protection scope of the application is not by described below
Specific embodiment limitation.
The embodiment in the application is illustrated in conjunction with Fig. 1 to Fig. 2.
As shown in Figure 1, present embodiments providing a kind of 10kV overhead transmission line lightning-caused breaking report based on fault current detection
Alarm device, the wire break alarm device 24 include: current detecting unit 22, control unit 15, trigger circuit 16 and alarm unit；
Current detecting unit 22 includes current transformer 4, and overhead transmission line 14 passes through current transformer 4, and current detecting unit 22 is for examining
Survey the conveying electric current on overhead transmission line 14；
Specifically, current transformer 4 is set on overhead transmission line 14, by current transformer 4 to defeated on overhead transmission line 14
Power transmission stream is detected, then the first induced current that induction generates is transferred to D/A conversion unit 13, by D/A conversion unit
13 pair of first induced current is converted, and corresponding detection electric current is generated, and be will test electric current and be sent to control unit 15, by controlling
15 pairs of detection electric currents of unit processed judge that control unit 15 generates corresponding trigger signal according to the logic judgment set,
And the trigger signal of generation is transferred to trigger circuit 16, trigger circuit 16 controls acousto-optic warning unit according to trigger signal respectively
17 and coordinate signal transmitting unit 18 carry out break alarm.
In the present embodiment, the input terminal of control unit 15 is connected to the output end of current detecting unit 22, control unit
15 output end is connected to trigger circuit 16, and the output end of trigger circuit 16 is connected to alarm unit, and control unit 15 includes meter
Shi Danyuan, control unit 15 are configured as starting timing unit when determining that conveying electric current is greater than or equal to default short circuit current,
Control unit 15 is additionally configured to after the completion of timing unit timing, presets ground fault when determining that conveying electric current is greater than or equal to
When electric current, control trigger circuit 16 generates trigger signal；
Further, it after control unit 15 starts timing unit, is additionally configured to, is let out when determining that output electric current is greater than to preset
When leakage current, control timing unit stops timing.
Preferably, control unit 15 include super low-power consumption chip, by super low-power consumption chip carry out conveying electric current with preset it is short
Size judgement between road electric current, default earth-fault current and default leakage current.
Specifically, default short circuit current, default earth-fault current and default leakage electricity are set in control unit 15
Stream, wherein can set default short circuit current as 2kA, default earth-fault current be 6A, default leakage current is 0A.Broken string
The working principle of warning device 24 is as follows:
Firstly, the conveying electric current transmission that detects the conveying electric current on overhead transmission line 14 by current transformer 4, and will test
Into control unit 15, conveying electric current is detected by control unit.When being struck by lightning on overhead transmission line 14, overhead transmission line
Lightning current is generated on 14, and the lightning current sensed (conveying electric current) is transferred to control unit 15 by current transformer 4.When
When control unit 15 determines that conveying electric current at this time is greater than or equal to default short circuit current, illustrate to occur on overhead transmission line 14 at this time
Lightning stroke then starts timing unit, carries out timing.
Secondly as being provided with lightning protection device on overhead transmission line 14, the lightning current on overhead transmission line 14 may
It is released by lightning protection device by other leakage paths, overhead transmission line 14 does not break because of lightning stroke, therefore, when passing through
Between after section t1, power distribution network closes a floodgate again, restores normal power supply, at this point, the conveying electric current on overhead transmission line 14 is greater than default leakage
Electric current, usually 170A~340A, then control unit 15 controls counting unit and stops timing, does not generate trigger signal, wherein when
Between the duration of section t1 be less than the timing duration t2 that is set of timing unit.
Finally, in the timing duration t2 of timing unit, when the conveying electric current on overhead transmission line 14 is respectively less than or is equal to pre-
If when leakage current, then illustrating overhead transmission line 14 because lightning stroke generates broken string, wire break alarm device 24 falls with overhead transmission line 14,
In, the timing duration t2 of timing unit is less than the duration that overhead transmission line 14 falls, therefore, when timing unit complete timing it
Afterwards, if the conveying electric current (earth current) that detects of current transformer 4 is greater than or equal to default earth-fault current, i.e. table
Bright overhead transmission line 14 is because lightning stroke causes to break, and the overhead transmission line 14 disconnected has dropped to ground, is formed into a loop with ground, produces
Earth-fault current is given birth to, at this point, control unit 15, which controls trigger circuit 16, generates trigger signal, it has been suggested that overhead transmission line broken string
It contacts to earth.
In the present embodiment, alarm unit is used to generate warning message according to trigger signal, wherein warning message includes
Photoelectric alarm information, audible alarm information and location coordinate information.
Further, alarm unit specifically includes: acousto-optic warning unit 17 and coordinate transmitting unit 18；Sound-light alarm list
Member 17 includes warning lamp and buzzer, and acousto-optic warning unit 17 is used to generate photoelectric alarm information and sound according to trigger signal
Warning message；Coordinate transmitting unit 18 is used to send location coordinate information according to trigger signal, and location coordinate information is broken string report
The number of shaft tower belonging to alarm device 24.
Specifically, after overhead transmission line contacts to earth, alarm unit is according to trigger signal, respectively by the buzzing in acoustic-optic alarm
Device and warning lamp generate audible alarm information and photoelectric alarm information, to remind the overhead transmission line broken string personnel near place that contact to earth remote
From unexpected to prevent personnel from contact occurs.
It preferably, further include wireless communication module in alarm unit.
Correspondingly, corresponding shaft tower is numbered module by wireless communication by the coordinate signal transmitting unit 18 in alarm unit
Emitted, by shaft tower number be sent in corresponding cloud server, by cloud server according to the shaft tower of storage number into
Row broken string positions, and then disconnection fault information is sent to the mobile terminal of maintenance personal, and maintenance personal is connect at any time
Disconnection fault information is received, is handled in time.
Further, wire break alarm device 24 further include: taking online can module 19 and energy-storage units 21；Taking online can module
19 are set between current transformer 4 and energy-storage units 21；Energy-storage units 21 include sequentially connected AC/DC conversion module 8, filter
Wave module 9, Voltage stabilizing module 10 and energy-storage battery group 11, AC/DC conversion module 8 are set to the input terminal of energy-storage units 21, storage
Energy battery pack 11 is set to the output end of energy-storage units 21, and the output end of energy-storage units 21 is connected to the confession of current detecting unit 22
The feeder ear at electric end, the feeder ear of control unit 15 and alarm unit, energy-storage units 21 are used for can module 19 according to online take
The energy storage electric current of generation carries out electric energy energy storage, power supply.
It specifically, will according to the principle of equal effects of electric current induction coil in order to illustrate the working principle for taking energy module 19 online
Energy module 19 and electric current induction coil 4 is taken equally to be divided into primary side, equivalent induction coil and secondary side online, wherein primary
Side includes that induction coil equivalent power supply 1, the equivalent impedance 2 of induction coil and primary side matching impedance 3, secondary side include secondary side
Matching impedance 5.According to the working principle of current transformer, when passing through electric current in current transformer 4, current transformer 4 is generated
Induced current (the second induced current), is herein the prior art, repeats no more.Taking online can the acquisition current transformer 4 of module 19
The second induced current generated, is transferred to energy-storage units 21 for induced current.
By being set to the AC/DC conversion module 8 of 21 input terminal of energy-storage units, by the second induced current of current transformer
It is converted to DC current (energy storage electric current) by alternating current, and energy storage electric current is passed through into filter module 9 and Voltage stabilizing module 10, into
Row filtering and pressure stabilizing finally carry out energy storage by the energy storage electric current after 11 pairs of energy-storage battery group filtering, pressure stabilizings, in order to electric current
Detection unit 22, control unit 15 and alarm unit are powered, and are conducive to wire break alarm device and are run steadily in the long term.
Preferably, filter module 9 is that RCL filters combinational circuit.
Further, wire break alarm device 24 further include: protection circuit unit 20；Protection circuit unit 20 is set to online
Between taking energy unit 19 and energy-storage units 21, protection circuit unit 20 includes three concatenation modules 6 and ceramic gas discharge tube 7,
Concatenation module 6 includes concatenated varistor and temperature safety tube, wherein the first end of the first concatenation module is connected to be taken online
Can be between the feeder ear of module 19 and the input terminal of energy-storage units 21, the second end of the first concatenation module is connected to ceramic gas and puts
The first end of fulgurite 7, the second end of ceramic gas discharge tube 7 are connected to the ground terminal of energy-storage units 21, the second concatenation module with
After the series connection of third concatenation module, it is parallel to the both ends of the first concatenation module.
Specifically, when wire break alarm device 24 because lightning stroke generates Lightning Over-voltage, or because manual operation generation operated
When voltage, overvoltage is directly poured into the earth under the action of protecting circuit 20, guarantees the low pressure in wire break alarm device 24
Circuit part normally works.
Further, wire break alarm device 24 further include: relief means 26；Relief means 26 are set to broken string
The outside of warning device 24, buffer unit 26 are used to slow down wire break alarm device 24 when overhead transmission line 14 breaks and hit with ground
Hit the impact of generation.
Specifically, relief means 26 are set in the outside of wire break alarm device, to reduce the broken string touching of overhead transmission line 14
To the impact of wire break alarm device when ground, to guarantee that wire break alarm device can operate normally.
Further, wire break alarm device 24 is installed on the two sides of insulator 25 on overhead transmission line 14, wire break alarm device
The distance between 24 and insulator 25 are 230mm to 270mm.
Specifically, as shown in Fig. 2, being provided with insulator 25 on overhead transmission line, wire break alarm device is installed on insulation
The two sides of son, and the value of distance L is 230mm to 270mm between insulator, such as set distance L=250mm, to guarantee thunder
When striking off line, when the both ends of overhead transmission line are contacted to earth, corresponding warning message can be generated at the both ends contacted to earth, to neighbouring people
Member is timely alarmed.
The technical solution for having been described in detail above with reference to the accompanying drawings the application, present applicant proposes one kind to be examined based on fault current
The 10kV overhead transmission line lightning-caused breaking warning device of survey, the wire break alarm device include: current detecting unit, control unit, touching
Power Generation Road and alarm unit；Current detecting unit includes current transformer, and overhead transmission line passes through current transformer, current detecting
Unit is used to detect the conveying electric current of overhead line road；The input terminal of control unit is connected to the output end of current detecting unit,
The output end of control unit is connected to trigger circuit, and the output end of trigger circuit is connected to alarm unit, and control unit includes meter
Shi Danyuan, control unit are configured as starting timing unit, control when determining that conveying electric current is greater than or equal to default short circuit current
Unit processed is additionally configured to after the completion of timing unit timing, presets earth-fault current when determining that conveying electric current is greater than or equal to
When, control trigger circuit generates trigger signal；Alarm unit is used to generate warning message, wherein alarm signal according to trigger signal
Breath includes photoelectric alarm information, audible alarm information and location coordinate information.By the technical solution in the application, thunder is improved
The reliability and accuracy for hitting burn out detection, reduce a possibility that overvoltage causes false alarm, be conducive to repairing and quickly it is extensive
Multiple power supply.
Step in the application can be sequentially adjusted, combined, and deleted according to actual needs.
Unit in the application device can be combined, divided and deleted according to actual needs.
Although disclosing the application in detail with reference to attached drawing, it will be appreciated that, these descriptions are only exemplary, not
For limiting the application of the application.The protection scope of the application may include not departing from this Shen by appended claims
It please be in the case where protection scope and spirit for various modifications, remodeling and equivalent scheme made by inventing.
Claims (7)
1. a kind of 10kV overhead transmission line lightning-caused breaking warning device based on fault current detection, which is characterized in that the broken string
Warning device includes: current detecting unit (22), control unit (15), trigger circuit (16) and alarm unit；
The current detecting unit (22) includes current transformer (4), and overhead transmission line (14) passes through the current transformer (4),
The current detecting unit (22) is used to detect the conveying electric current on the overhead transmission line (14)；
The input terminal of described control unit (15) is connected to the output end of the current detecting unit (22), described control unit
(15) output end is connected to the trigger circuit (16), and it is single that the output end of the trigger circuit (16) is connected to the alarm
Member, described control unit (15) includes timing unit,
Described control unit (15) is configured as starting institute when determining that the conveying electric current is greater than or equal to default short circuit current
Timing unit is stated,
Described control unit (15) is additionally configured to after the completion of the timing unit timing, when the judgement conveying electric current is greater than
Or when being equal to default earth-fault current, controls the trigger circuit (16) and generate trigger signal；
The alarm unit is used to generate warning message according to the trigger signal,
Wherein, the warning message includes photoelectric alarm information, audible alarm information and location coordinate information.
2. the 10kV overhead transmission line lightning-caused breaking warning device based on fault current detection as described in claim 1, feature
It is,
It after described control unit (15) starts the timing unit, is additionally configured to, is preset when determining that the output electric current is greater than
When leakage current, controls the timing unit and stop timing.
3. the 10kV overhead transmission line lightning-caused breaking warning device based on fault current detection as described in claim 1, feature
It is, the alarm unit specifically includes: acousto-optic warning unit (17) and coordinate transmitting unit (18)；
The acousto-optic warning unit (17) includes warning lamp and buzzer, and the acousto-optic warning unit (17) is used for according to the touching
It signals, generates the photoelectric alarm information and the audible alarm information；
The coordinate transmitting unit (18) is used to send the location coordinate information according to the trigger signal, and the position is sat
Mark the number that information is the affiliated shaft tower of the wire break alarm device.
4. the 10kV overhead transmission line lightning-caused breaking warning device based on fault current detection as described in claim 1, feature
It is, further includes: taking online can module (19) and energy-storage units (21)；
It is described that energy module (19) is taken to be set between the current transformer (4) and the energy-storage units (21) online；
The energy-storage units (21) include sequentially connected AC/DC conversion module (8), filter module (9), Voltage stabilizing module (10) with
And energy-storage battery group (11), the AC/DC conversion module (8) are set to the input terminal of the energy-storage units (21), the energy storage
Battery pack (11) is set to the output end of the energy-storage units (21), and the output end of the energy-storage units (21) is connected to institute
The feeder ear, the feeder ear of described control unit (15) and the feeder ear of the alarm unit of current detecting unit (22) are stated,
The energy-storage units (21) are used to carry out electric energy energy storage, power supply according to the energy storage electric current for taking energy module (19) to generate online.
5. the 10kV overhead transmission line lightning-caused breaking warning device based on fault current detection as claimed in claim 4, feature
It is, further includes: protection circuit unit (20)；
The protection circuit unit (20) is set between the online taking energy unit (19) and the energy-storage units (21), described
Protecting circuit unit (20) includes three concatenation modules (6) and ceramic gas discharge tube (7), and the concatenation module (6) includes string
The varistor and temperature safety tube of connection,
Wherein, the first end of the first concatenation module is connected to the feeder ear for taking energy module (19) online and the energy storage
Between the input terminal of unit (21), the second end of first concatenation module is connected to the ceramic gas discharge tube (7)
First end, the second end of the ceramic gas discharge tube (7) is connected to the ground terminal of the energy-storage units (21), the second concatenation
Module connect with third concatenation module after, be parallel to the both ends of first concatenation module.
6. the 10kV overhead transmission line lightning-caused breaking warning device based on fault current detection as described in claim 1, further includes:
Relief means (26)；
The relief means (26) are set to the outside of the wire break alarm device, and the buffer unit (26) is for working as institute
When stating overhead transmission line (14) broken string, slows down the wire break alarm device (24) and make impact with the ground the impact of generation.
7. such as the 10kV overhead transmission line lightning-caused breaking alarm described in any one of claims 1 to 6 based on fault current detection
Device, which is characterized in that
The wire break alarm device is installed on the two sides of insulator (25) on the overhead transmission line (14), the wire break alarm device
The distance between described insulator (25) is 230mm to 270mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811359165.2A CN109507528B (en) | 2018-11-15 | 2018-11-15 | 10kV overhead line thunderbolt broken string alarm device based on fault current detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811359165.2A CN109507528B (en) | 2018-11-15 | 2018-11-15 | 10kV overhead line thunderbolt broken string alarm device based on fault current detection |
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| CN109507528B CN109507528B (en) | 2020-11-06 |
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| CN110794332A (en) * | 2019-11-14 | 2020-02-14 | 浙江晨泰科技股份有限公司 | Residual current transformer detection system for fire detection detector and detection method thereof |
| CN112020188A (en) * | 2020-08-14 | 2020-12-01 | 湖南一肯照明有限公司 | Urban traffic wisdom street lamp based on thing networking |
| CN113655340A (en) * | 2021-08-27 | 2021-11-16 | 国网湖南省电力有限公司 | Voiceprint recognition-based power transmission line lightning stroke fault positioning method, system and medium |
| CN114113886A (en) * | 2021-11-22 | 2022-03-01 | 海南电网有限责任公司万宁供电局 | Lightning stroke broken line detection device based on 10kV overhead line |
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| CN114113886A (en) * | 2021-11-22 | 2022-03-01 | 海南电网有限责任公司万宁供电局 | Lightning stroke broken line detection device based on 10kV overhead line |
| CN114113886B (en) * | 2021-11-22 | 2023-11-28 | 海南电网有限责任公司万宁供电局 | Lightning stroke broken line detection device based on 10kV overhead line |
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