CN109298290A - Fault judgment device and method and cable system - Google Patents
Fault judgment device and method and cable system Download PDFInfo
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- CN109298290A CN109298290A CN201811474033.4A CN201811474033A CN109298290A CN 109298290 A CN109298290 A CN 109298290A CN 201811474033 A CN201811474033 A CN 201811474033A CN 109298290 A CN109298290 A CN 109298290A
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- 238000001514 detection method Methods 0.000 claims description 10
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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
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
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Abstract
The application discloses fault judgment device, method and cable system, fault judgment device is applied to transmission cable's cross interconnection section, cross interconnection section includes three-phase cable core and adopts the cross interconnection mode to set up in the three-phase three protective layer in the cable core outside, every protective layer all includes the sub-protection layer section of a plurality of electricity connections, the device includes: the acquisition module is used for respectively detecting the current values of the end parts of the protection layers; and the fault judgment circuit is connected with the acquisition module and is used for comparing the current value of the end part of the protective layer in the cross interconnection section aiming at the cross interconnection section so as to judge the sub-protective layer section with a fault in the cross interconnection section. The device and the method provided by the embodiment of the application can accurately position the fault position in the cross interconnection section of the power transmission cable.
Description
Technical field
This application involves electric power network technical fields, in particular to a kind of failure judgment device, method and cable system
System.
Background technique
In high-tension cable, it all may cause cable run failure due to external force destruction, insulation ag(e)ing etc., be
Timely repairing, needs first to determine the accurate location of fault point.
In the prior art, in ultra-high-tension power transmission line, especially long range High Voltage Cable Transmission Lines (110kV or more, one
As every 500~800 meters just using transition joint connection, while passing through cross interconnected mode for limitation sheath induced current
Metal sheath is divided into several cross interconnected sections, one cross interconnected section includes three sections).In the failure to high-tension line
When being positioned, often after route breaks down tripping, at the beginning of realizing fault point using bridge method, traveling wave method etc. first
Step positioning, is then accurately positioned using step voltage method again, and scene is finally needed to confirm again to route.
The above method is not only complicated, is also merely capable of judging the Position Approximate of fault point, can not directly judge
It is out of order a little a bit of in high-tension cable.
Summary of the invention
In order to overcome above-mentioned deficiency in the prior art, the application's is designed to provide a kind of failure judgment device, answers
For cross interconnected section of power transmission cable, described cross interconnected section is included threephase cable core and is set using cross interconnected mode
Three protective layers being placed on the outside of cable core described in three-phase, each protective layer include the son protection interval of multiple electrical connections,
Described device includes:
Acquisition module, the current value of the end for detecting each protective layer respectively；
Fault judging circuit, the fault judging circuit are connect with the acquisition module, for for described cross interconnected
Section, compares the current value size of the end of protective layer described in this cross interconnected section to judge to break down in this cross interconnected section
The sub- protection interval.
Optionally, the acquisition module includes acquisition unit and the processing unit that connect with the acquisition unit, described
Acquisition unit is used to acquire the induced current of the end of the protective layer, and the processing unit is used to carry out the induced current
It samples, and calculates the current value of the acquisition unit according to sampled result.
Optionally, each protective layer includes that three sons protect interval, the son protection interval in each protective layer
It is corresponded with every phase cable core of cable core described in three-phase, the fault judging circuit is also used to according to each friendship
The current value size of the end of protective layer described in fork interconnecting section judges the cable core to break down in this cross interconnected section.
Optionally, the fault judging circuit includes data access module；
The data access module is connect with the acquisition module, each protection obtained for obtaining the acquisition module
The current value of the end of layer, judges this cross interconnected section according to the current value of the end of each protective layer in described cross interconnected section
Whether break down, and in the case where the cross interconnected section of judging result is failure, obtains each guarantor in this cross interconnected section
The current value of sheath end.
Optionally, the data access module includes detection unit and access unit；
The detection unit is connect with the acquisition module, for the electricity according to described cross interconnected section each protective layer end
Change rate of the flow valuve in predetermined period judges that this cross interconnected section whether there is failure；
The access unit is separately connected with the detection unit and the acquisition module, for described cross interconnected
When section breaks down, the current value of the end of each section of protective layer in this cross interconnected section is obtained.
Optionally, each cross interconnected section of each protective layer in the case of non-faulting is stored in the fault judging circuit
First mapping table of the current value relative size of end and the son protection interval to break down, the fault judging circuit include event
Hinder judgment module；
The breakdown judge module is connect with the data access module, for receiving the data access module acquisition
The current value of each protective layer end in described cross interconnected section, and according to the electricity of protective layer end each in this cross interconnected section
Flow valuve size and first mapping table determine the sub- protection interval to break down in this cross interconnected section.
Optionally, the breakdown judge module includes comparing unit and judging unit；
The comparing unit is connect with the data access module, for receiving described in the data access module preservation
The current value of the end of cross interconnected section of each protective layer, and compare the current value of the end of cross interconnected section of each protective layer
Size；
The judging unit is connect with the comparing unit, for according to the comparing unit to described cross interconnected section
The comparison result of the current value size of the end of each protective layer judges the sub- protection broken down in this cross interconnected section
Interval.
Optionally, the data access module further includes transmission unit, the transmission unit and the breakdown judge module
The current value of connection, the end of described cross interconnected section of each protective layer for obtaining the data access module is sent
To the breakdown judge module.
The another object of the application is a kind of fault judgment method, described applied to cross interconnected section of power transmission cable
Cross interconnected section include threephase cable core and using cross interconnected mode be set on the outside of cable core described in three-phase three
A protective layer, each protective layer include the son protection interval of multiple electrical connections, which comprises
Obtain the current value of each protective layer end in described cross interconnected section；
For described cross interconnected section, compare the big of the current value of each protective layer end in this cross interconnected section
It is small；
It is determined in this cross interconnected section according to the size of the current value of the protective layer end each in this cross interconnected section
The sub- protection interval to break down.
The another object of the application is a kind of cable system, the system comprises cross interconnected section of multistage and to take up an official post
Failure judgment device described in one, wherein each described cross interconnected section includes three sub- protective layers.
In terms of existing technologies, the application has the advantages that
In the embodiment of the present application, the electric current of the end of each protective layer in same cross interconnected section is acquired by acquisition module
Then the size that breakdown judge module carrys out the electric current of the end of each protective layer in more same cross interconnected section is arranged in value, from
And judge which specific sub- protective layer breaks down in this cross interconnected section according to the comparison result by breakdown judge module,
To realize the more accurate positioning to fault point.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural schematic diagram of cross interconnected power transmission cable provided by the embodiments of the present application；
Fig. 2 is the structural schematic diagram one of failure judgment device provided by the embodiments of the present application；
Fig. 3 is the structural schematic diagram two of failure judgment device provided by the embodiments of the present application；
Fig. 4 is the structural schematic diagram three of failure judgment device provided by the embodiments of the present application；
Fig. 5 is the setting schematic diagram of acquisition unit provided by the embodiments of the present application；
Fig. 6 is the structural schematic diagram four of failure judgment device provided by the embodiments of the present application；
Fig. 7 is the structural schematic diagram five of failure judgment device provided by the embodiments of the present application；
Fig. 8 is the flow diagram of fault judgment method provided by the embodiments of the present application.
Icon: 10- cable core；20- protective layer；30- acquisition module；31- acquisition unit；32- processing unit；40- event
Hinder decision circuitry；41- breakdown judge module；411- comparing unit；412- judging unit；42- data access module；421- detection
Unit；422- access unit.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.The application being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiments herein provided in the accompanying drawings is not intended to limit below claimed
Scope of the present application, but be merely representative of the selected embodiment of the application.Based on the embodiment in the application, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model of the application protection
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present application, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put, be merely for convenience of description the application and simplify description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as the limitation to the application.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
Solution is indication or suggestion relative importance.
In addition, the terms such as term "horizontal", "vertical", " pendency " are not offered as requiring component abswolute level or pendency, and
It is that can be slightly tilted.It is not to indicate the device if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It has to fully horizontally, but can be slightly tilted.
In the description of the present application, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in this application.
Fig. 1 is please referred to, Fig. 1 is the structural schematic diagram of cross interconnected power transmission cable provided by the embodiments of the present application.It is described
Cross interconnected section includes three protective layers 20 and is set to the three-phase electricity in three protective layers 20 using cross interconnected mode
Cable core 10, each protective layer 20 include multiple sub- protection intervals.
In the present embodiment, protective layer 20 is wrapped around the structure outside cable core 10 for shielding, Mei Gebao
The son protection interval that sheath 20 can be sequentially electrically connected by three sections of head and the tail is constituted, at this point, in each cross interconnected section, Ke Yizong
It altogether include that nine cross-talks protect interval.In each cross interconnected section, three protective layers 20 are in threephase cable core 10 using friendship
The mode of fork interconnection is arranged, that is to say, that the cross-talk protection interval in each protective layer 20 respectively corresponds threephase cable core
A phase cable core in 10.
For one cross interconnected section, when threephase cable core 10 be respectively A phase cable core, B phase cable core with
It include protective layer X, protective layer Y and protective layer Z in this cross interconnected section and when C phase cable core, protective layer X includes that son is protected
Sheath section Xa, sub- protection interval Xb and son protection interval Xc, protective layer Y include son protection interval Ya, sub- protection interval Yb with
And son protection interval Yc, protective layer Z include son protection interval Za, sub- protection interval Zb and son protection interval Zc.Then son protection
Interval Xa, sub- protection interval Xb and son protection interval Xc can be respectively corresponded and be arranged in A phase cable core, B phase cable core
And the outside of C phase cable core；Then son protection interval Ya, sub- protection interval Yb and son protection interval Yc can distinguish
It is correspondingly arranged at B phase cable core, C phase cable core and A phase cable core；Then son protection interval Za, sub- protection interval Zb
And son protection interval Zc can be respectively C phase cable core, A phase cable core and B phase cable core.Wherein, Mei Gebao
Three son protection intervals in sheath 20 are sequentially connected electrically.
Referring to figure 2., Fig. 2 is the structural schematic diagram of the failure judgment device applied to above-mentioned cross interconnected power transmission cable,
Described device includes acquisition module 30 and the fault judging circuit connecting with acquisition module 30 40.Wherein, acquisition module 30 is used
Current value in the end for detecting each protective layer 20, that is to say, that the both ends of each protective layer 20 in same cross interconnected section
Faradic current value can be acquired by current acquisition module 30.
Fault judging circuit 40 is used for the end for the protective layer 20 in cross interconnected section for needing to detect in cable run
The size of the current value in portion is compared, thus according to the comparison knot of the end current value of this section cross interconnected section of protective layer 20
Fruit judges in this cross interconnected section specifically failure has occurred in which sub- protection interval.
In the present embodiment, acquisition module 30 can be interconnected with fault judging circuit 40.For example, can directly pass through route
Electrical connection can also be wirelessly connected by being wirelessly connected module.
In the present embodiment, the current value can be the virtual value in 30 collected power frequency periods of acquisition module.
In the present embodiment, power frequency period can be 0.02s.
Optionally, the acquisition module 30 includes acquisition unit 31 and processing unit 32, wherein acquisition unit 31 and processing
Unit 32 connects, and the acquisition unit 31 is used to acquire the induced current of the end of the protective layer 20, the processing unit 32
The induced current is sampled for basis, and calculates the current value of the acquisition unit 31 according to sampled result.
In the present embodiment, since the electric current in each protective layer 20 in cross interconnected section is induced current, each
Size of current in protective layer 20 is real-time change.Processing unit 32 can be sampled according to preset sample frequency,
Then the corresponding effective current of each induced current in a predetermined period is calculated according to predetermined period (for example, power frequency period)
Value, abbreviation current value.
Specifically, acquisition unit 31 can be one for acquiring a protective layer 20 referring to figure 3. in the present embodiment
The original part of end, for example, acquisition unit 31 can be an electromagnetic sensor.When using the fault locator,
One acquisition unit 31 is set to every one end of each protective layer 20 in cross interconnected section for needing to detect, at this point, processing is single
Member 32 can connect one to one with the acquisition unit 31.
In the present embodiment, multiple acquisition units 31 can be connect with same processor, for example, referring to figure 4., being located at same
Three acquisition units 31 of one cross interconnected section of the same end constitute one 31 groups of acquisition unit, in 31 groups of the same acquisition unit
Acquisition unit 31 is connect with the same processing unit 32.
Referring to figure 5., in the present embodiment, acquisition unit 31 can be installed on the protective layer 20 at each cross interconnected section of both ends
Three-phase ground position.
Optionally, in the present embodiment, it can also be arranged and be separately connected the acquisition unit 31 and the processing unit 32
Attenuation units, attenuation units are for sending the processing unit to after the electric current that the acquisition unit 31 acquires is decayed
32.The problem of subsequent conditioning circuit caused by prevent the current value of the acquisition of acquisition unit 31 unstable damages.
Fig. 6 is please referred to, optionally, fault judging circuit 40 includes breakdown judge module 41, the failure in the present embodiment
Judgment module 41 can directly or indirectly be interconnected with acquisition unit 31, for receiving each protection in described cross interconnected section
The current value of 20 end of layer, and the intersection is determined according to the current value size of 20 end of protective layer each in each cross interconnected section
The specific location of fault point in interconnecting section.Wherein, breakdown judge module 41 can be directly electrically connected by route with acquisition unit 31
It connects, can also be wirelessly connected by being wirelessly connected module.
Please continue to refer to Fig. 6, specifically, the breakdown judge module 41 includes comparing unit 411 and judging unit
412.The comparing unit 411 can be interconnected with the acquisition module 30, for needing to judge position of failure point for each
The cross interconnected section of end for comparing protective layer 20 described in this cross interconnected section current value size；The judging unit 412
It is connect with the comparing unit 411, for judging the sub- protection interval to break down in described cross interconnected section.
In the present embodiment, comparing unit 411 can be realized by existing comparison circuit.
In addition, comparing unit 411 is also possible to processor having data processing function such as processor etc., at this point,
It can store the end of each cross interconnected section of each protective layer 20 in the case of non-faulting in the fault judging circuit 40
First mapping table of current value relative size and the son protection interval to break down, that is to say, that in each cross interconnected section, six
The case where current value correspondence one of a end breaks down.For example, when group protection interval Xa breaks down, sub- protection interval
Electric current in Xa can obviously than this cross interconnected section in current value in each sub- protective layer section it is big, and on son protection interval Xb
Induced current due to by the faradic influence on sub- protection interval Xa, value can be smaller than the induced current on Xa,
Induced current in son protection interval Xc can be influenced by sub- protection interval Xa and son protection interval Xb simultaneously, therefore, sub- guarantor
Faradic electric current in sheath section Xc is the smallest in the protective layer.And the induced current in other each sub- protective layer section
Will be smaller than the induced current on sub- protection interval Xa, therefore, the collected electricity of acquisition module of the end of sub- protection interval Xa
Flow valuve is also bigger.Breakdown judge module 41 is according to the electric current of 20 end of protective layer each in cross interconnected section of some to break down
The current value of the end of each protective layer 20 is big in this cross interconnected section stored in value size and first mapping table
It is small to be compared.It is bright if occurring the current value of sub- protective layer end in this cross interconnected section compared with other end current values
Situation bigger than normal is shown, then can determine whether that sub- protection interval Xa breaks down.
Please refer to Fig. 7, in the present embodiment, optionally, the fault judging circuit 40 further includes being connected to breakdown judge mould
Data access module 42 between block 41 and acquisition module 30.
The data access module 42 can be interconnected with the acquisition module 30, be obtained for obtaining the acquisition module 30
The current value of the end of each protective layer 20 obtained, according to the current value of the end of protective layer 20 each in described cross interconnected section
Judge whether this cross interconnected section broken down, and in the case where the cross interconnected section of judging result is failure, obtains the friendship
Pitch the current value of each 20 end of protective layer in interconnecting section.Wherein, data access module 42 can be straight with the acquisition module 30
Route electrical connection was connected, can also be wirelessly connected by being wirelessly connected module.
Please continue to refer to Fig. 7, specifically, the data access module 42 includes detection unit 421 and access unit 422.
The detection unit 421 is connect with the acquisition module 30, for according to the cross interconnected section of protective layer end
Change rate of the current value in predetermined period judge this cross interconnected section with the presence or absence of failure.Such as, it can be determined that current work
The electricity of the current value of each end of cross interconnected section of each protective layer 20 and the interior end of upper a cycle in the frequency period
The change rate of flow valuve, if in one cross interconnected section, the change rate for having the current value of one or any end is more than pre-
If change rate threshold value, then judge that this section cross interconnected section has occurred failure.Between detection unit 421 and the acquisition module 30
It can be wired connection, be also possible to be wirelessly connected.
The access unit 422 is separately connected with the comparing unit 411 and the acquisition module 30, for described
Cross interconnected section when breaking down, obtains the current value of the end of each section of protective layer 20 in this cross interconnected section.
The comparing unit 411 is connect with data access unit 422, is saved for receiving the data access unit 422
Described cross interconnected section of each protective layer 20 end current value, and compare the end of cross interconnected section of each protective layer 20
The size of the current value in portion.
The judging unit 412 is connect with the comparing unit 411, is used for according to the comparing unit 411 to the friendship
The comparison result for pitching the current value size of the end of each protective layer 20 of interconnecting section judges fault point in this cross interconnected section
Specific location.
Optionally, in the present embodiment, the fault judging circuit 40 is also used to according to institute in each described cross interconnected section
The current value size of the end of protective layer 20 is stated to judge the cable core 10 to break down in this cross interconnected section.
The present embodiment is for judging failure has occurred in which phase cable core 10 in cross interconnected section.When specifically judging,
The function can equally be realized by existing comparison circuit.There can also be data processing function by existing processor etc.
Device realize, at this point it is possible to configure the second mapping table in fault judging circuit 40, wherein the second mapping table is for protecting
Deposit the current value relative size of the end of each cross interconnected section of each protective layer 20 and pair of the cable core 10 to break down
It should be related to.
Optionally, in the present embodiment, the data access module 42 further includes transmission unit, the transmission unit with it is described
Breakdown judge module 41 connects, described cross interconnected section of each protective layer 20 for obtaining the data access module 42
The current value of end be sent to the breakdown judge module 41.
Fig. 8 is please referred to, another embodiment of the application also provides a kind of fault judgment method, the friendship applied to power transmission cable
Interconnecting section is pitched, described cross interconnected section includes threephase cable core 10 and be set to electricity described in three-phase using cross interconnected mode
Three protective layers 20 in 10 outside of cable core, each protective layer 20 son protection interval including multiple electrical connections, the method
Include:
Step S110 obtains the current value of each 20 end of protective layer in described cross interconnected section；
Step S120 compares each 20 end of protective layer in this cross interconnected section for described cross interconnected section
The size of current value；
Step S130 determines the friendship according to the size of the current value of 20 end of protective layer each in this cross interconnected section
The sub- protection interval to break down in fork interconnecting section.
The embodiment of the present invention fault judgment method can be applied to any of the above one described in failure judgment device.
Another embodiment of the application also provides a kind of cable system, the system comprises cross interconnected section of multistage and such as
Failure judgment device described in any of the above item, wherein each described cross interconnected section includes three sub- protective layers.
In conclusion acquiring each protective layer in same cross interconnected section by acquisition module in the embodiment of the present application
Then the electric current that breakdown judge module comes the end of each protective layer in more same cross interconnected section is arranged in the current value of end
Size, so which specific sub- protective layer in this cross interconnected section judged according to the comparison result by breakdown judge module
It breaks down, to realize the more accurate positioning to fault point.Scheme described in the embodiment of the present application is particularly suitable for over long distances
High-tension cable breakdown judge.
In embodiment provided herein, it should be understood that disclosed device and method, it can also be by other
Mode realize.The apparatus embodiments described above are merely exemplary it is also noted that in block diagram and or flow chart
Each box and the box in block diagram and or flow chart combination, can function or movement as defined in executing it is dedicated
Hardware based system realize, or can realize using a combination of dedicated hardware and computer instructions.
In addition, each functional module in each embodiment of the application can integrate one independent portion of formation together
Point, it is also possible to modules individualism, an independent part can also be integrated to form with two or more modules.
It, can be with if the function is realized and when sold or used as an independent product in the form of software function module
Access is in a computer-readable access medium.Based on this understanding, the technical solution of the application is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product accesses in an access medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) execute each embodiment the method for the application all or part of the steps.
And access medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only access device (ROM, Read-Only Memory), arbitrary access are deposited
Take device (RAM, Random Access Memory), magnetic or disk etc. are various can be with the medium of access program code.
The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any
Those familiar with the art within the technical scope of the present application, can easily think of the change or the replacement, and should all contain
Lid is within the scope of protection of this application.Therefore, the protection scope of the application shall be subject to the protection scope of the claim.
Claims (10)
1. a kind of failure judgment device, which is characterized in that applied to cross interconnected section of power transmission cable, the cross interconnected section of packet
It includes threephase cable core and three protective layers on the outside of cable core described in three-phase is set to using cross interconnected mode, each
Protective layer includes the son protection interval of multiple electrical connections, and described device includes:
Acquisition module, the current value of the end for detecting each protective layer respectively；
Fault judging circuit, the fault judging circuit are connect with the acquisition module, for being directed to described cross interconnected section, than
Compared with the current value size of the end of protective layer described in this cross interconnected section to judge the institute to break down in this cross interconnected section
State sub- protection interval.
2. failure judgment device according to claim 1, which is characterized in that the acquisition module include acquisition unit and
The processing unit connecting with the acquisition unit, the acquisition unit are used to acquire the induced current of the end of the protective layer,
The processing unit calculates the current value of the acquisition unit according to sampled result for sampling to the induced current.
3. failure judgment device according to claim 2, which is characterized in that each protective layer includes three son protections
Interval, every phase cable core one-to-one correspondence of the son protection interval in each protective layer and cable core described in three-phase, institute
State the current value size judgement that fault judging circuit is also used to the end of the protective layer according to each described cross interconnected section
The cable core to break down in this cross interconnected section.
4. failure judgment device according to claim 1-3, which is characterized in that the fault judging circuit includes
Data access module；
The data access module is connect with the acquisition module, for obtaining each protective layer that the acquisition module obtains
The current value of end, according to the current value of the end of each protective layer in described cross interconnected section judge this cross interconnected section whether
It breaks down, and in the case where the cross interconnected section of judging result is failure, obtains each protective layer in this cross interconnected section
The current value of end.
5. failure judgment device according to claim 4, which is characterized in that the data access module includes detection unit
And access unit；
The detection unit is connect with the acquisition module, for the current value according to described cross interconnected section each protective layer end
Change rate in predetermined period judges that this cross interconnected section whether there is failure；
The access unit is separately connected with the detection unit and the acquisition module, for sending out at described cross interconnected section
When raw failure, the current value of the end of each section of protective layer in this cross interconnected section is obtained.
6. failure judgment device according to claim 4, which is characterized in that be stored with non-event in the fault judging circuit
The current value relative size of the end of each cross interconnected section of each protective layer and the son protection interval to break down in the case of barrier
The first mapping table, the fault judging circuit includes breakdown judge module；
The breakdown judge module is connect with the data access module, for receiving described in the data access module acquisition
The current value of each protective layer end in cross interconnected section, and according to the current value of protective layer end each in this cross interconnected section
Size and first mapping table determine the sub- protection interval to break down in this cross interconnected section.
7. failure judgment device according to claim 6, which is characterized in that the breakdown judge module includes comparing unit
And judging unit；
The comparing unit is connect with the data access module, the intersection saved for receiving the data access module
The current value of the end of each protective layer of interconnecting section, and compare the end of cross interconnected section of each protective layer current value it is big
It is small；
The judging unit is connect with the comparing unit, for each to described cross interconnected section according to the comparing unit
The comparison result of the current value size of the end of protective layer judges the sub- protection interval to break down in this cross interconnected section.
8. failure judgment device according to claim 7, which is characterized in that the data access module further includes sending list
Member, the transmission unit are connect with the breakdown judge module, and the intersection for obtaining the data access module is mutual
The current value for joining the end of each protective layer of section is sent to the breakdown judge module.
9. a kind of fault judgment method, which is characterized in that applied to cross interconnected section of power transmission cable, the cross interconnected section of packet
It includes threephase cable core and three protective layers on the outside of cable core described in three-phase is set to using cross interconnected mode, each
Protective layer includes the son protection interval of multiple electrical connections, which comprises
Obtain the current value of each protective layer end in described cross interconnected section；
For described cross interconnected section, compare the size of the current value of each protective layer end in this cross interconnected section；
It is determined in this cross interconnected section and is occurred according to the size of the current value of the protective layer end each in this cross interconnected section
The sub- protection interval of failure.
10. a kind of cable system, which is characterized in that appoint the system comprises cross interconnected section of multistage and such as claim 1-8
Failure judgment device described in one, wherein each described cross interconnected section includes three sub- protective layers.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103792467A (en) * | 2014-02-25 | 2014-05-14 | 国家电网公司 | High-voltage crosslinked polyethylene cable grounding current mechanism and fault analysis method |
| CN103941161A (en) * | 2014-05-12 | 2014-07-23 | 国家电网公司 | On-line monitoring system for current and carrying capacity of cable sheath |
| CN106093527A (en) * | 2016-07-13 | 2016-11-09 | 许继集团有限公司 | The mutual header of intelligent crossover, intelligent interconnection earthed system and earth current monitoring method |
| CN106940413A (en) * | 2017-05-11 | 2017-07-11 | 国网江苏省电力公司苏州供电公司 | The short trouble section determination methods and device of high pressure long cable circuit |
| CN107728001A (en) * | 2017-08-21 | 2018-02-23 | 国网北京市电力公司 | Three-phase cross cable current fault detection device |
| CN108152662A (en) * | 2017-11-24 | 2018-06-12 | 国网浙江省电力公司台州供电公司 | A kind of cross interconnected box fault diagnosis method and system based on earth current |
| CN108646143A (en) * | 2018-07-12 | 2018-10-12 | 广东电网有限责任公司东莞供电局 | Single-core power cable fault detection structure based on circulation measurement and fault detection method thereof |
-
2018
- 2018-12-04 CN CN201811474033.4A patent/CN109298290A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103792467A (en) * | 2014-02-25 | 2014-05-14 | 国家电网公司 | High-voltage crosslinked polyethylene cable grounding current mechanism and fault analysis method |
| CN103941161A (en) * | 2014-05-12 | 2014-07-23 | 国家电网公司 | On-line monitoring system for current and carrying capacity of cable sheath |
| CN106093527A (en) * | 2016-07-13 | 2016-11-09 | 许继集团有限公司 | The mutual header of intelligent crossover, intelligent interconnection earthed system and earth current monitoring method |
| CN106940413A (en) * | 2017-05-11 | 2017-07-11 | 国网江苏省电力公司苏州供电公司 | The short trouble section determination methods and device of high pressure long cable circuit |
| CN107728001A (en) * | 2017-08-21 | 2018-02-23 | 国网北京市电力公司 | Three-phase cross cable current fault detection device |
| CN108152662A (en) * | 2017-11-24 | 2018-06-12 | 国网浙江省电力公司台州供电公司 | A kind of cross interconnected box fault diagnosis method and system based on earth current |
| CN108646143A (en) * | 2018-07-12 | 2018-10-12 | 广东电网有限责任公司东莞供电局 | Single-core power cable fault detection structure based on circulation measurement and fault detection method thereof |
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