CN108008221A - Active spurring formula multifrequency senses current cable recognition methods and device - Google Patents
Active spurring formula multifrequency senses current cable recognition methods and device Download PDFInfo
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- CN108008221A CN108008221A CN201711260518.9A CN201711260518A CN108008221A CN 108008221 A CN108008221 A CN 108008221A CN 201711260518 A CN201711260518 A CN 201711260518A CN 108008221 A CN108008221 A CN 108008221A
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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
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Abstract
It is provided by the invention to be based on the faradic cable recognition methods of Active spurring formula multifrequency and device, its method is included cable armor layer, the circuit that ground wire and the earth are formed is as secondary coil, coding AC signal is produced by driving source and drives primary coil, and then the induced voltage of specific curves is produced in the secondary coil, and sensing produces the encoding loop electric current of individual features in the circuit that high-tension cable armor and two-terminal-grounding line and the earth are formed, inductive loop electric current is gathered by high precision current transformer at the same time, obtain cable grounding impedance, realize state and the characteristic monitoring of this cable；After the coding that the present invention can be produced by Active spurring in high pressure and extra-high-tension cable senses the live multiple spot networking of electric current autonomous communication completion, the identification of cable full line and tracking are realized.
Description
Technical field
The present invention relates to power domain, more particularly to a kind of sensing current cable recognition methods of Active spurring formula multifrequency and dress
Put.
Background technology
Electric wire is to be used for transmission electric (magnetic) energy, information and the wire product for realizing electromagnetic energy conversion.The electric wire of broad sense
The cable that cable is also referred to simply as cable narrow senses refers to insulated cable.Wherein 1KV and it is following be low-voltage cable；During 1KV~10KV is
Voltage cable；10KV~35KV is high-tension cable；35~220KV is extra-high-tension cable；Extra-high-tension cable is with cable technology
A kind of power cable for continuing to develop and occurring, extra-high-tension cable belong to generally as the middle hinge belt in large-scale transmission system
A kind of higher high-tension cable of technology content, is mainly used for remote power transmission, and high voltage cable is one kind of power cable,
Refer to the power cable being used for transmission between 10KV-35KV (1KV=1000V), the major trunk roads for being applied to power transmission more, high pressure
The part of cable from inside to outside includes：Conductor, insulation, sheath, filler material (armouring), external insulation.Armored high-voltage cable
It is mainly used for buried, the compressing of high intensity on ground can be resisted, while can prevent other damages.Height as shown in Figure 1
Voltage cable hierarchy, copper strip shielding therein are used for leakage protection with steel-tape armouring, need strictly to complete in installation process
Ground connection operation, with ensure cable safe and reliable operation, and ground resistance need it is as far as possible small.Because installation side after long-play
The factor such as formula or mounting process respective nodes can produce the phenomenon of resistance value increase, seriously affect the safe operation of cable.
In cable work, how fast and accurately to identify that target cable is extremely important, current recognition methods needs
Before cable identification, target cable is in off-position, disadvantage of this is that not only greatly reduce cable identification
Efficiency, and need to contact the metal part of cable, complicated, security is low, and brings economic loss.
The content of the invention
In view of this, the present invention provides a kind of Active spurring formula multifrequency sensing current cable recognition methods and device.
Active spurring formula multifrequency provided by the invention senses current cable recognition methods, including by cable armor layer, ground connection
The circuit that line and the earth are formed produces AC signal by driving source and drives primary coil, in the secondary as secondary coil
The induced voltage produced in coil, and then produce inductive loop electricity in cable armor layer, ground wire and the earth are formed into a loop
Stream, by detecting the inductive loop electric current, obtains cable armor layer impedance loop.
Further, the frequency spectrum in the circuit is scanned, obtains clear channel and control driving source generation and institute
The corresponding frequency signal of clear channel is stated, loads the voltage of the frequency signal to cable.
Further, the frequency for carrying coding information is encoded and sent by driving source to the transmitting data information of cable
Rate characteristic current, by being decoded accordingly to the frequecy characteristic electric current, so that the transmitting data information of cable is obtained, institute
Stating transmitting data information includes cable identity identification information and/or digital signal information.
Further, onsite energy collector is set, and the onsite energy collector includes open type energy mutual inductor, electric field
Sensing device, the energy compatibility module for tracking bus current load variations and the scene ginseng for collection site supplemental characteristic
Number acquisition module, the open type energy mutual inductor and electric field induction device are connected with service cable respectively, for obtaining cable
Radiation electric energy.
Further, the relay unit for carrying out cable distance data transmission information is set and for relaying list to be described
Member carries out independently-powered independently-powered unit, the electromagnetic field or mother that the independently-powered unit is excited by live bus current
Line voltage electric field self-generating.
Present invention also offers a kind of Active spurring formula multifrequency sense current cable identification device, including driving source, with swash
Encourage excitation magnetic core, the collecting unit for gathering inductive loop electric current and for the collection electric current according to collecting unit of source connection
Calculate the processing unit of cable grounding impedance；
Using the circuit that cable armor layer, ground wire and the earth are formed as secondary coil, exchange letter is loaded by driving source
The secondary coil is produced induced voltage, and pass through cable armor layer, ground wire and the earth and be formed into a loop, produce sensing
The inductive loop electric current of collection is transferred to processing unit, cable is obtained by processing unit by loop current, the collecting unit
Impedance ground.
Further, driving source controller and the scan channel unit for being scanned to the frequency spectrum in cable are further included,
Clear channel is obtained by scan channel unit, driving source controller control driving source produces opposite with the clear channel
The frequency signal answered, loads the voltage of the frequency signal to cable, while is carried out by multi-system digital frequency modulation mode
The transmission of data, in zero crossing, magnetic material internal magnetic flux resets zero, by tracking the unsaturated frequency of magnetic material
Electric current, takes its cycle zero crossing to complete data transmission with the unsaturated time of magnetic material before and after zero crossing.
Further, coding unit and decoding unit are further included, the coding unit is used for the transmitting data information to cable
Encoded, the frequecy characteristic electric current for carrying coding information is sent by driving source, the decoding unit is special to the frequency
Sign electric current is decoded accordingly, obtains the transmitting data information of cable, and the transmitting data information is identified including cable identity
Information and/or digital signal information.
Further, onsite energy collector is further included, the onsite energy collector includes open type energy mutual inductor, electricity
Field sensing device, the energy compatibility module for tracking bus current load variations and the scene for collection site supplemental characteristic
Parameter collection module, the open type energy mutual inductor and electric field induction device are connected with service cable, for obtaining electric energy.
Further, relay unit for carrying out cable distance data transmission information is further included and for for relay unit
Carry out independently-powered independently-powered unit, the electromagnetic field or busbar that the independently-powered unit is excited by live bus current
Voltage electric field generates electricity.
Beneficial effects of the present invention：The present invention accurately can complete target cable in the case of cable on-line operation
The acquisition of the relevant information such as title and numbering.So as to simply differentiate very much the ownership and correlation of all cables in cable duct
Data.Very easily recognition methods is brought for the maintenance and construction of cable；
The present invention can transmit data by high-tension cable, so that the high-tension cable on-line condition monitoring in cable duct
The low cost deployment of system is possibly realized；
The present invention completes this after live multiple spot networking being completed by autonomous communication in high pressure and extra-high-tension cable
State and the characteristic monitoring of cable, realize that cable is followed the trail of, and can voluntarily take energy at the scene by onsite energy collector, with
External environment condition separates, and may be directly applied in high pressure and extra-high voltage system, and the present invention need not during installation and use
Any cable status is changed, and cable metal part need not be contacted, it is easy to operate, it is safe.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 is the principle of the present invention schematic diagram.
Fig. 2 is construction of cable schematic diagram of the present invention.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples：Fig. 1 is the principle of the present invention schematic diagram, Fig. 2
It is construction of cable schematic diagram of the present invention.
As shown in Figure 1, 2, the Active spurring formula multifrequency sensing current cable recognition methods in the present embodiment, including by cable
Armor layer, ground wire and the earth formed circuit be used as secondary coil, by driving source produce AC signal driving primary coil,
The induced voltage produced in the secondary coil, and then produced in cable armor layer, ground wire and the earth are formed into a loop
Inductive loop electric current, by detecting the inductive loop electric current, obtains cable armor layer impedance loop.As shown in Fig. 2, according to height
The hierarchy of voltage cable, copper strip shielding therein are used for leakage protection with steel-tape armouring, are needed in installation process stringent complete
Into ground connection operate, with ensure cable safe and reliable operation, and ground resistance need it is as far as possible small.Because installation after long-play
The factor such as mode or mounting process respective nodes can produce the phenomenon of resistance value increase, seriously affect the safe operation of cable, this
Embodiment, by transformer principle, will be grounded as secondary coil (1 circle) using excitation magnetic core, be subject to driving source in source class and add
Carry AC signal, then corresponding voltage and energy will be induced on secondary coil (1 circle), the voltage induced (vector) is logical
Cross high-tension cable armor to be formed into a loop with two-terminal-grounding line and the earth, so as to produce electric current, electric current is gathered using current transformer
Amount, then phase 0 on the basis of driving voltage, the electric current relative datum gathered have a phase deviation, then the electric current is also vector,
Pass through I=U/Z；The impedance ground of cable is extrapolated, so as to complete loop cable impedance measurement indirectly.
In the present embodiment, the frequency spectrum in docking point cable is scanned, and is obtained clear channel and is controlled driving source to produce
The raw and corresponding frequency signal of the clear channel, loads the voltage of the frequency signal to cable, and pass through multi-system
Digital frequency modulation mode carries out the transmission of data, by being loaded on excitation magnetic core as AC signal, when being run because of cable
There are 50Hz High Level AC Voltages thereon, so the interference electric current based on 50Hz alternating currents can be produced on earth cable, plus ABC
Three-phase, is secondly 150Hz alternating currents, plus the harmonic current in every phase phase line, so the interference electric current on ground cable is suitable
Complexity, the present embodiment, to 20KHz frequency spectrums, are found glitch-free channel, are given birth to by driving source by continuously scanning 1Hz in earth cable
Into this channel respective frequencies signal (any single-points of driving source exportable 1Hz to 20KHz or multiple spot complex spectrum), this frequency is loaded
Voltage on cable, completing noiseless accurately cable resistance value test.Use multi-system digital frequency modulation at the same time
(MFSK) mode, while complete the transmission of data：For being spaced between the frequency point of earth loop impedance test, and frequency point number by with
Family is before use by setting communication strategy to determine；Corresponding pumping signal is loaded into excitation magnetic core by transmitting terminal, and then is loaded into
Distal end is sent on cable；Distal end reception system uses the channel hopping mode consistent and synchronous with transmitting terminal, accurately obtains 1Hz
To the spectrum information of 20KHz, so as to extract the useful information in effective frequency point.
In the present embodiment, the transmitting data information of cable is encoded and is sent by driving source and carry coding letter
The frequecy characteristic electric current of breath, by being decoded accordingly to the frequecy characteristic electric current, obtains the transmitting data information of cable,
The transmitting data information includes cable identity identification information and/or digital signal information.What is loaded on excitation magnetic core is just
String ac signal, is grounded the voltage induced and is formed into a loop by high-tension cable, so that electric current is produced, the frequency of this electric current
Variation characteristic is consistent with size of current in near-end with distal end, so can then be adopted at the same time in distal end addition current transformer 2
Collect frequency content included in the size of current for flowing through tested cable and electric current.Frequecy characteristic electric current is one containing specific
The current signal with Special Significance, its power frequency alternately changes by specific rule, while its current amplitude, phase are also pressed
Rule change is set, frequecy characteristic electric current is loaded on cable by driving source, electricity is gathered by current transformer 2 in distal end
Stream, by corresponding algorithm and signal model that is predefined, synchronously changing with transmitting terminal, according to the current waveform received
Characteristic solution separates out the digital information included in variable-current, so as to fulfill sending and receiving for data.Using dispensing device
Produce and sending and receiving for data completed by special reception mode after the current loop for carrying specific information, this mode with
Radio frequency of the prior art, and the communication mode such as voltage-type power line carrier, PLC of current trend have obvious difference, and
And any cable status need not be changed during installation and use.And cable metal part need not be contacted.
In the present embodiment, since high-voltage great-current electric current of the scene with tens amperes of busbar 50Hz is by making data
The too early saturation of magnetic material of the micro-current mutual inductor of receiving terminal, so that data, the present embodiment can not be received continuously for a long time
Bus current synchronizing function is added, during the entire process of busbar transmits electric energy, otherwise its zero-sequence current is zero, or be still
Together frequency synthesis non-zero current vector, has the characteristic of cycle zero passage, magnetic material internal magnetic flux is resetted and returned in zero crossing
Zero, in zero crossings because the small magnetic material of bus current is unsaturated, by tracking the frequecy characteristic electric current, take its cycle zero crossing
Data transmission is completed with a bit of time before and after zero crossing, so as to greatly expand the sensing current data transmission of Active spurring formula
Application field, and the scope of application.
In the present embodiment, the title of every cable or other identity identification informations are compiled on driving source controller,
After being decoded after the specific current with data is distally received according to the decoding protocol arranged in advance, cable title is shown, into
The reading of cable electronic tag.Data are completed the hardware encryption of feeding rear stage 64 after 128 software cryptographies by the present embodiment
Device, just loads data on cable after completing 128 softwares and 64 hardware encryptions, ensure that data pass to greatest extent
Defeated security.Meanwhile using global unique identification code (the safety certification I C of such as MAXI M), it ensure that cable label
Uniqueness, and then when solving Stranded cable and identifying at the same time, since the Hamming distance of coding is too small, and produces asking of interfering with each other
Topic.In addition to the loading of cable electronic tag, other any digital signals can be also transmitted, list is sent and received by loading at the same time
Member is, it can be achieved that data relay function, so that the data communication of equipment has broken the limitation of unit distance so as to form cable
Networking topological structure.During live relay function is completed, the electromagnetic field or busbar that are excited by live bus current
The device of voltage electric field power generation.When having larger current in high voltage bus (such as：Can be that all devices are powered when 20A)；Work as mother
When line current is smaller, standby energy is maintained for equipment at the same time using electromagnetic field and electric field, such as the normal work of data link,
And provide operating current for operative sensor.
In the present embodiment, there is provided onsite energy collector, onsite energy collector include open type energy mutual inductor,
Electric field induction device, for tracking the energy compatibility module of bus current load variations and showing for collection site supplemental characteristic
Field parameters acquisition module, the open type energy mutual inductor and electric field induction device are connected with service cable, for obtaining electric energy.
Open type energy mutual inductor and electric field induction device in the present embodiment, direct clip complete electric energy acquisition on service cable,
Other connection modes can also be used, pass through the energy compatibility module supporting with open type energy mutual inductor, tracking busbar electricity
The change of stream load (including size and phase), by special circuit and intelligent collection of energy algorithm, is obtained to greatest extent
The instable energy on cable is taken, so as to maintain system normal operation.Preferably, can by adding different unit modules,
The collecting function of the live related data of completion that then can be independently, such as live humiture, cable temperature, cable vibrations, cable electricity
The parameters such as stream.Relay unit for carrying out cable distance data transmission information is set and for being carried out independently for relay unit
The independently-powered unit of power supply, the electromagnetic field or busbar voltage electric field that the independently-powered unit is excited by live bus current
Power generation, live can voluntarily take energy by independently-powered unit, can separate and independent operating, directly apply to external environment condition
In high pressure and extra-high voltage system.It is complete by autonomous communication in high pressure and extra-high-tension cable by being equipped with corresponding expansion module
State and the characteristic monitoring of this cable are completed after into live multiple spot networking, chain is directly wirelessly transferred by third parties such as GPRS
Complete data and report in road.
In the present embodiment, by an open-core transformer for being more than the outside diameter of cable, directly it is stuck on cable, so that it may realize
Cable is followed the trail of, in the reading of the complete paired cable electronic tag in distal end, so as to fulfill directly read online it is being transmitted in this cable plus
Ciphertext data, is directly positioned by decrypting process and is tracked cable.Preferably, it is internally integrated high-power rechargeable electricity in open-core transformer
Pond, short distance high-speed radiocommunication module and high speed, high resolution AD conversion module, short distance high-speed radiocommunication module is by AD conversion
The data that module collects are transmitted to on-site terminal to complete the data processing and display work in later stage.So as to significantly contract
The volume of small mutual inductor is easy to field application.
Correspondingly, the present embodiment additionally provides a kind of Active spurring formula multifrequency sensing current cable identification device, including swashs
The excitation magnetic core that encourage source, is connected with driving source, the collecting unit for gathering inductive loop electric current and for according to collecting unit
Collection Current calculation cable grounding impedance processing unit；
Using ground wire as secondary coil, loading AC signal by driving source makes the secondary coil produce induced electricity
Pressure, and be formed into a loop by high-tension cable armor and two-terminal-grounding line and the earth, inductive loop electric current is produced, the collection is single
The inductive loop electric current of collection is transferred to processing unit by member, and cable grounding impedance is obtained by processing unit.
Further include driving source controller and for the scan channel unit that the frequency spectrum in contact cable is scanned, pass through letter
Road scanning element obtains clear channel, and driving source controller control driving source produces and the corresponding frequency of the clear channel
Rate signal, loads the voltage of the frequency signal to cable, and the biography of data is carried out by multi-system digital frequency modulation mode
It is defeated.
Coding unit and decoding unit are further included, the coding unit is used to compile the transmitting data information of cable
Code, the characteristic current for carrying coding information is sent by driving source, and the characteristic current is carried out by the decoding unit
Corresponding decoding, obtains the transmitting data information of cable, and the transmitting data information includes cable identity identification information and/or number
Word signal message.
Onsite energy collector is further included, the onsite energy collector includes open type energy mutual inductor, electric field induction
Device, the energy compatibility module for tracking bus current load variations and adopted for the on-site parameters of collection site supplemental characteristic
Collect module, the open type energy mutual inductor and electric field induction device are connected with service cable, for obtaining electric energy.
Further include the relay unit for carrying out cable distance data transmission information and for being carried out solely for relay unit
The independently-powered unit of vertical power supply, electromagnetic field or the busbar voltage electricity that the independently-powered unit is excited by live bus current
Field power generation.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail in good embodiment, it will be understood by those of ordinary skill in the art that, can be to the skill of the present invention
Art scheme technical scheme is modified or replaced equivalently, without departing from the objective and scope of technical solution of the present invention, it should all cover at this
Among the right of invention.
Claims (10)
1. a kind of Active spurring formula multifrequency senses current cable characteristic detecting method, it is characterised in that：Including by cable armor layer,
The circuit that ground wire and the earth are formed produces AC signal by driving source and drives primary coil, described as secondary coil
The induced voltage produced in secondary coil, and then produce and sense back in cable armor layer, ground wire and the earth are formed into a loop
Road electric current, by detecting the inductive loop electric current, obtains cable grounding impedance.
2. Active spurring formula multifrequency according to claim 1 senses current cable characteristic detecting method, it is characterised in that：It is right
Frequency spectrum in the circuit is scanned, and is obtained clear channel and is controlled driving source generation corresponding with the clear channel
Frequency signal, load the voltage of the frequency signal to cable.
3. Active spurring formula multifrequency according to claim 2 senses current cable recognition methods, it is characterised in that：To cable
Transmitting data information encoded and sent by driving source and carry the frequecy characteristic electric current of coding information, by described
Frequecy characteristic electric current is decoded accordingly, so as to obtain the transmitting data information of cable, the transmitting data information includes electricity
Cable identification information and/or digital signal information.
4. Active spurring formula multifrequency according to claim 3 senses current cable recognition methods, it is characterised in that：Set existing
Field energy collector, the onsite energy collector include open type energy mutual inductor, electric field induction device, for tracking busbar
The energy compatibility module of current capacity change and the on-site parameters acquisition module for collection site supplemental characteristic, the open type
Energy mutual inductor and electric field induction device are connected with service cable respectively, for obtaining the radiation electric energy of cable.
5. Active spurring formula multifrequency according to claim 4 senses current cable recognition methods, it is characterised in that：Set and use
In the relay unit for carrying out cable distance data transmission information and for carrying out independently-powered independence for the relay unit
Power supply unit, the electromagnetic field or busbar voltage electric field self-generating that the independently-powered unit is excited by live bus current.
6. a kind of Active spurring formula multifrequency senses current cable identification device, it is characterised in that：Connect including driving source, with driving source
The excitation magnetic core that connects, the collecting unit for gathering inductive loop electric current and for the collection Current calculation electricity according to collecting unit
The processing unit of cable impedance ground；
Using the circuit that cable armor layer, ground wire and the earth are formed as secondary coil, loading AC signal by driving source makes
The secondary coil produces induced voltage, and is formed into a loop by cable armor layer, ground wire and the earth, produces inductive loop
The inductive loop electric current of collection is transferred to processing unit, cable grounding is obtained by processing unit by electric current, the collecting unit
Impedance.
7. Active spurring formula multifrequency according to claim 6 senses current cable identification device, it is characterised in that：Further include
Driving source controller and the scan channel unit for being scanned to the frequency spectrum in cable, nothing is obtained by scan channel unit
Interference channel, driving source controller control driving source produces and the corresponding frequency signal of the clear channel, described in loading
The voltage of frequency signal carries out by multi-system digital frequency modulation mode the transmission of data to cable, in zero crossing
Magnetic material internal magnetic flux reset zero, by tracking the unsaturated frequency current of magnetic material, take its cycle zero crossing with
The magnetic material unsaturation time completes data transmission before and after zero crossing.
8. Active spurring formula multifrequency according to claim 7 senses current cable identification device, it is characterised in that：Further include
Coding unit and decoding unit, the coding unit are used to encode the transmitting data information of cable, are sent out by driving source
The frequecy characteristic electric current for carrying coding information is sent, the decoding unit decodes the frequecy characteristic electric current accordingly,
The transmitting data information of cable is obtained, the transmitting data information includes cable identity identification information and/or digital signal information.
9. Active spurring formula multifrequency according to claim 8 senses current cable identification device, it is characterised in that：Further include
Onsite energy collector, the onsite energy collector include open type energy mutual inductor, electric field induction device, for tracking mother
The energy compatibility module of line current load variations and the on-site parameters acquisition module for collection site supplemental characteristic, the opening
Formula energy mutual inductor and electric field induction device are connected with service cable, for obtaining electric energy.
10. Active spurring formula multifrequency according to claim 9 senses current cable identification device, it is characterised in that：Also wrap
Include relay unit for carrying out cable distance data transmission information and for carrying out independently-powered independence for relay unit
Power supply unit, the electromagnetic field or busbar voltage electric field electricity-generating that the independently-powered unit is excited by live bus current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711260518.9A CN108008221A (en) | 2017-12-04 | 2017-12-04 | Active spurring formula multifrequency senses current cable recognition methods and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711260518.9A CN108008221A (en) | 2017-12-04 | 2017-12-04 | Active spurring formula multifrequency senses current cable recognition methods and device |
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| Publication Number | Publication Date |
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| CN108008221A true CN108008221A (en) | 2018-05-08 |
Family
ID=62056586
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| CN201711260518.9A Pending CN108008221A (en) | 2017-12-04 | 2017-12-04 | Active spurring formula multifrequency senses current cable recognition methods and device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111208392A (en) * | 2020-04-16 | 2020-05-29 | 武汉格蓝若智能技术有限公司 | Label-free cable collection trend identification method |
| CN112098901A (en) * | 2020-08-12 | 2020-12-18 | 深圳供电局有限公司 | Cable identification method and device, computer equipment and readable storage medium |
| CN112636892A (en) * | 2020-12-01 | 2021-04-09 | 华帝股份有限公司 | Full-duplex communication method and system |
| CN113236211A (en) * | 2021-06-01 | 2021-08-10 | 西南石油大学 | Device and method for removing water phase trapping damage through underground eddy heat shock of tight reservoir |
| CN115144791A (en) * | 2022-09-06 | 2022-10-04 | 浙江新图维电子科技有限公司 | Method and system for online detection of high-voltage cable armor grounding state |
| CN115441342A (en) * | 2022-09-21 | 2022-12-06 | 国网江苏省电力有限公司南京供电分公司 | Surrounding grounding system of air-core reactor and arrangement method thereof |
| CN116539963A (en) * | 2023-04-28 | 2023-08-04 | 烟台国网中电电气有限公司 | Method for detecting grounding resistance of grounding down conductor of power transmission line tower |
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2017
- 2017-12-04 CN CN201711260518.9A patent/CN108008221A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111208392A (en) * | 2020-04-16 | 2020-05-29 | 武汉格蓝若智能技术有限公司 | Label-free cable collection trend identification method |
| CN111208392B (en) * | 2020-04-16 | 2020-07-31 | 武汉格蓝若智能技术有限公司 | Label-free cable collection trend identification method |
| CN112098901A (en) * | 2020-08-12 | 2020-12-18 | 深圳供电局有限公司 | Cable identification method and device, computer equipment and readable storage medium |
| CN112098901B (en) * | 2020-08-12 | 2022-10-28 | 深圳供电局有限公司 | Cable identification method and device, computer equipment and readable storage medium |
| CN112636892B (en) * | 2020-12-01 | 2022-07-08 | 华帝股份有限公司 | Full duplex communication method and system |
| CN112636892A (en) * | 2020-12-01 | 2021-04-09 | 华帝股份有限公司 | Full-duplex communication method and system |
| CN113236211B (en) * | 2021-06-01 | 2022-04-05 | 西南石油大学 | Device and method for removing water phase trapping damage through underground eddy heat shock of tight reservoir |
| CN113236211A (en) * | 2021-06-01 | 2021-08-10 | 西南石油大学 | Device and method for removing water phase trapping damage through underground eddy heat shock of tight reservoir |
| CN115144791A (en) * | 2022-09-06 | 2022-10-04 | 浙江新图维电子科技有限公司 | Method and system for online detection of high-voltage cable armor grounding state |
| CN115441342A (en) * | 2022-09-21 | 2022-12-06 | 国网江苏省电力有限公司南京供电分公司 | Surrounding grounding system of air-core reactor and arrangement method thereof |
| CN115441342B (en) * | 2022-09-21 | 2024-06-11 | 国网江苏省电力有限公司南京供电分公司 | Hollow reactor peripheral grounding system and arrangement method thereof |
| CN116539963A (en) * | 2023-04-28 | 2023-08-04 | 烟台国网中电电气有限公司 | Method for detecting grounding resistance of grounding down conductor of power transmission line tower |
| CN116539963B (en) * | 2023-04-28 | 2023-11-21 | 烟台国网中电电气有限公司 | Method for detecting grounding resistance of grounding down conductor of power transmission line tower |
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Application publication date: 20180508 |