CN206147043U - High tension cable partial discharge detector device based on equalization is measured - Google Patents
High tension cable partial discharge detector device based on equalization is measured Download PDFInfo
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- CN206147043U CN206147043U CN201621199086.6U CN201621199086U CN206147043U CN 206147043 U CN206147043 U CN 206147043U CN 201621199086 U CN201621199086 U CN 201621199086U CN 206147043 U CN206147043 U CN 206147043U
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- current transformer
- cable
- phases
- partial discharge
- discharge detection
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Abstract
The utility model provides a high tension cable partial discharge detector device based on equalization is measured, high tension cable includes A, B, C three -phase single core cable, and every looks single core cable comprises each segmentation, still including the HF current transformer and the shielding layer earth connection that act on each single core cable, the shielding layer earth connection is connected respectively to every looks single core cable's adjacent sectionalised shielding layer, the shielding layer earth connection of adjacent sectionalised shielding layer winds on HF current transformer's once side magnetic core respectively, and the wire winding is not connected carried forward and ground in opposite directions, the winding has signal output line on HF current transformer's the secondary side magnetic core. The beneficial effects are that based on the HF current transformer equalization, measure the high tension cable partial discharge electric current, effective restraint system interference current, cable partial discharge position is fixed a position to the inside partial discharge signal of sensitive sensing cable to to the detection host computer in a distant place or on the spot detection device send alarm information.
Description
Technical field
This utility model belongs to high tension cable Partial Discharge Detection unit field, and more particularly, to a kind of high frequency electric is based on
The high tension cable Partial Discharge Detection unit of transformer equalization measurement.
Background technology
After cable puts into operation, due to rotten, overheated, mechanical damage of insulation ag(e)ing etc., cable can be caused in operation
Insulation degradation.In order to prevent, because insulation degradation causes cable interruption of service, needing to supervise the running status of cable in real time
Survey.But the detection method of existing high tension cable shelf depreciation mostly is and is detected from cable one end, or to end
And the detection of cable accessory, this detection method is sensitive low, cannot carry out insulation defect positioning.This utility model is proposed first
The junction of each cable segmentation installs the HF current transformer through special coiling additional, using equalization measurement high tension cable office
Portion's discharge current, can effectively eliminate the electric current formed interference signal of three phase capacitance, and sensitivity is high, can position insulation defect
To each cut cable, on-line checking can be not only realized, also be capable of achieving live detection.
Fig. 1 show typical high tension cable paving mode, and high tension cable is usually A, B, C three-phase single-core cable, containing electricity
Core 4, screen layer 5, cable connector 6 and cable termination 7.In order to avoid line-frequency induction circulation, cable is directly connect using one end
Ground, the other end is grounded through spark gap 8.The balance of A, B, C three phase capacitance electric current and counteracting in order to realize cable shield 5,
Reduce the power current in screen layer 5, the three-phase commutation of the connection of screen layer 5 is carried out at each cable connector 6.Cable shield
The basic demand of 5 connections can be summarized as：Reliable ground；Avoid circulation；Three phase capacitance current canceling.
Utility model content
In view of this, this utility model is directed to a kind of high tension cable Partial Discharge Detection dress measured based on equalization
Put, based on HF current transformer equalization, measure high tension cable shelf depreciation electric current, effectively suppression system can disturb, spirit
Local discharge signal inside quick sensing cable, positioning partial discharge position, and detection main frame distally or on the spot detection dress
Put transmission warning message.
To reach above-mentioned purpose, what the technical solution of the utility model was realized in：
A kind of high tension cable local discharge detection device measured based on equalization, high tension cable includes A, B, C three-phase list
Core cable, and be made up of each segmentation per phase single-core cable, also including HF current transformer and shielding layer grounding line, cable phase
The screen layer of neighbour's segmentation connects respectively the shielding layer grounding line, and the shielding layer grounding line of adjacent sectional is respectively in the height
Coiling on the primary side magnetic core of frequency current transformer, direction of winding after docking conversely, and be connected to ground, the high frequency electric mutual inductance
Output line is wound with the secondary side magnetic core of device.
Further, the HF current transformer includes A phase HF current transformers, B phases HF current transformer and C
Phase HF current transformer；A phase adjacent sectional screen layers are wound with the primary side magnetic core of the A phases HF current transformer
The shielding layer grounding line；B phase adjacent sectional screen layers are wound with the primary side magnetic core of the B phases HF current transformer
The shielding layer grounding line；C phase adjacent sectional screen layers are wound with the primary side magnetic core of the C phases HF current transformer
The shielding layer grounding line；Also include Partial Discharge Detection unit, the A phases HF current transformer, the B phases high frequency electric
The secondary side magnetic core of transformer and the C phases HF current transformer accesses the shelf depreciation inspection by output line respectively
Survey unit.
Further, 3G module is provided with the Partial Discharge Detection unit, the 3G module passes through 3G antenna wireless
Connection distance host.
Further, the Partial Discharge Detection unit is connected with optical fiber, and the optical fiber is also connected with distance host.
Further, memory card interface and USB interface are provided with the Partial Discharge Detection unit.
Further, also including cable electricity-getting mutual inductor, the cable electricity-getting mutual inductor is for the electrical connection A phases high-frequency electrical
Current transformer, the B phases HF current transformer, the C phases HF current transformer and the Partial Discharge Detection unit.
Relative to prior art, the high tension cable Partial Discharge Detection dress measured based on equalization described in the utility model
Put and have the advantage that：
This utility model is based on HF current transformer equalization, high tension cable shelf depreciation electric current is measured, by will be every
The screen layer of the adjacent sectional of phase single-core cable connects respectively shielding layer grounding line, then by the shielding layer grounding of adjacent sectional
The line coiling on the primary side magnetic core of the HF current transformer respectively, direction of winding conversely, and dock after be connected to ground, i.e.,
It is the sensing that local discharge signal is realized by screen layer, on the secondary side magnetic core of HF current transformer signal output is wound with
Line, exports local discharge signal, and disclosure satisfy that reliable ground, avoids circulation and the basic of three phase capacitance current canceling from wanting
Ask.
When there is interference in cable, interference signal is coupled to cable shield through the electric capacity of the segmentation of single-core cable,
And produce interference electric current in shielding layer grounding line.Because the structure of the segmentation of each single-core cable is identical, length is close to, so
Interference electric current amplitude in the shielding layer grounding line of each segmentation is close to, and direction is identical, and the magnetic flux for thus producing in magnetic core connects
It is near to offset, do not produce signal output on the secondary side magnetic core of HF current transformer.
When there is shelf depreciation in a single-phase cable segmentation, pulse current of PD is with another segmentation in this segmentation
For loop, the office's discharge stream amplitude in two segmentations is close to, in opposite direction, thus in the primary side magnetic core of HF current transformer
The magnetic flux of upper generation is mutually strengthened, and on the secondary side magnetic core of HF current transformer signal output is produced.
And this utility model can also be examined signal on the secondary side magnetic core of HF current transformer by shelf depreciation
Survey unit and be acquired the display of electric current, if the electric current for being not detected by electric current or detecting is less than the threshold values adjusted, explanation
Generation is put in high tension cable without office；If secondary side has electric current, the electric current for detecting illustrates high-tension electricity more than the threshold values adjusted
There is office to put generation in cable, putting by sense of current judgement office is occurred in one section of cable or cable two-stage nitration, can be carried out more
Careful and accurate measurement of partial discharge, analysis and positioning.
Output signal can also be wirelessly transmitted to by long-range master by the 3G module that is arranged on Partial Discharge Detection unit
Machine；Or by being connected to the optical fiber that Partial Discharge Detection unit is connected with, by fiber-optic signal by shelf depreciation information transfer
To distance host, data remote transmission is completed.3G module and optical-fibre communications are mutual exclusions, when there is optical-fibre communications, it is not necessary to 3G
Module, when not having optical-fibre communications, is carried out data transmission to distant place main frame using 3G module.
Description of the drawings
The accompanying drawing for constituting a part of the present utility model is used for providing further understanding to of the present utility model, and this practicality is new
The schematic description and description of type is used to explain this utility model, does not constitute to improper restriction of the present utility model.
In accompanying drawing：
Fig. 1 is the connected mode schematic diagram of three-phase high-voltage cable typical case's screen layer；
Fig. 2 is the attachment structure schematic diagram of this utility model embodiment；
Fig. 3 is the structural representation of this utility model live detection mode of operation；
Fig. 4 is the structural representation of this utility model on-line checking mode of operation.
Description of reference numerals：
1-A phase single-core cables；2-B phase single-core cables；3-C phase single-core cables；4- cable cores；5- screen layers；6- cables
Joint；7- cable terminations；8- spark gaps；9- HF current transformers；91- primary side magnetic cores；92- secondary side magnetic cores；10- is shielded
Layer earth lead；11- output lines；12-A phase HF current transformers；13-B phase HF current transformers；14-C phase high-frequency electrical
Current transformer；15- Partial Discharge Detection units；16-3G modules；17-3G antennas；18- optical fiber；19- memory card interfaces；20-USB
Interface；21- cable electricity-getting mutual inductors.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in this utility model can
To be mutually combined.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " horizontal ", " on ", D score,
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward " is
Based on orientation shown in the drawings or position relationship, it is for only for ease of description this utility model and simplifies description, rather than indicates
Or the device or element of hint indication with specific orientation, with specific azimuth configuration and operation, therefore must not be understood that
It is to restriction of the present utility model.Additionally, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicating
Or hint relative importance or the implicit quantity for indicating indicated technical characteristic.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integratedly
Connection；Can be mechanically connected, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, can be by concrete condition understanding
State concrete meaning of the term in this utility model.
Below with reference to the accompanying drawings and in conjunction with the embodiments describing this utility model in detail.
As shown in Fig. 2 it is a kind of based on equalization measure high tension cable local discharge detection device, high tension cable include A
Phase single-core cable 1, B phases single-core cable 2 and C phases single-core cable 3, and be made up of each segmentation per phase single-core cable, also including work
For the HF current transformer 9 and shielding layer grounding line 10 of each single-core cable, per the screen of the adjacent sectional of phase single-core cable
Cover layer and connect the shielding layer grounding line 10 respectively, the shielding layer grounding line 10 of adjacent sectional is respectively in the high frequency electric
Coiling on the primary side magnetic core 91 of transformer 9, direction of winding after docking conversely, and be connected to ground, the HF current transformer 9
Secondary side magnetic core 92 on be wound with output line 11.
As shown in figure 3, the HF current transformer 10 includes A phases HF current transformer 12, B phase high frequency electric mutual inductances
Device 13 and C phases HF current transformer 14；A phase phases are wound with the primary side magnetic core 91 of the A phases HF current transformer 12
The shielding layer grounding line 10 of adjacent grading shield layer；Wind on the primary side magnetic core 91 of the B phases HF current transformer 13
There is the shielding layer grounding line 10 of B phase adjacent sectional screen layers；The primary side magnetic core 91 of the C phases HF current transformer 14
On be wound with the shielding layer grounding line 10 of C phase adjacent sectional screen layers；Also include Partial Discharge Detection unit 15, the A
The secondary side magnetic of phase HF current transformer 12, the B phases HF current transformer 13 and the C phases HF current transformer 14
Core 92 accesses the Partial Discharge Detection unit 15 by output line 11 respectively.
As shown in figure 4, being provided with 3G module 16 in the Partial Discharge Detection unit 15, the 3G module 16 passes through 3G days
Line 17 wirelessly connects distance host.
As shown in figure 4, the Partial Discharge Detection unit 15 is connected with optical fiber 18, the optical fiber 18 also connects with distance host
Connect.
As shown in figure 4, being provided with memory card interface 19 and USB interface 20 on the Partial Discharge Detection unit 15.
As shown in figure 4, also including cable electricity-getting mutual inductor 21, the cable electricity-getting mutual inductor 21 is for the electrical connection A phases
HF current transformer 12, the B phases HF current transformer 13, the C phases HF current transformer 14 and the local are put
Electro-detection unit 15.
The course of work of this example：As shown in Fig. 2 this utility model is based on HF current transformer equalization, measurement is high
Voltage cable shelf depreciation electric current, by the way that the screen layer 5 of the adjacent sectional of every phase single-core cable to be connected respectively shielding layer grounding line
10, then by the shielding layer grounding line 10 of the screen layer 5 of adjacent sectional respectively on the primary side magnetic core 91 of HF current transformer 9
It is connected to ground after coiling, and opposite coiling docking, is the sensing that local discharge signal is realized by screen layer 5, high frequency electric
Output line 11 is wound with the secondary side magnetic core 92 of transformer 9, local discharge signal is exported, is disturbed when existing in cable
When, interference signal is coupled to cable shield 5 through the electric capacity of the segmentation of single-core cable, and produces in shielding layer grounding line 10
Raw interference electric current.Because the structure of the segmentation of each single-core cable is identical, length is close to, so the shielding layer grounding of each segmentation
Interference electric current amplitude in line 10 is close to, and direction is identical, and the magnetic flux for thus producing in cable core 4 is close to offsets, in high frequency
Signal output is not produced on the secondary side magnetic core 92 of current transformer 9.When there is shelf depreciation in a single-phase cable segmentation,
Pulse current of PD is segmented into loop with another in this segmentation, and the office's discharge stream amplitude in two segmentations is close to, direction phase
Instead, the magnetic flux for thus producing on the primary side magnetic core 91 of HF current transformer 9 is mutually strengthened, in HF current transformer 9
Secondary side magnetic core 92 on produce signal output.
As shown in figure 3, for the mode of operation of live detection：By signal on the secondary side magnetic core 92 of HF current transformer 9,
The display of electric current is acquired by Partial Discharge Detection unit 15, if the electric current for being not detected by electric current or detecting is less than
The threshold values adjusted, illustrates to put generation without office in high tension cable；If secondary side has electric current, the electric current for detecting is more than what is adjusted
Threshold values, illustrates have office to put generation in high tension cable, and being put by sense of current judgement office is occurred in one section of cable or cable two
Section, carries out more careful and accurate measurement of partial discharge, analysis and positioning.
As shown in figure 4, being on-line checking mode of operation：By the 3G module being arranged on Partial Discharge Detection unit 15
16, output signal is wirelessly transmitted to into distance host；Or by being connected to the optical fiber that Partial Discharge Detection unit 15 is connected with
18, shelf depreciation information transfer is completed by data remote transmission to distance host by fiber-optic signal.3G module 16 and optical fiber 18
It is mutual exclusion, when there is optical fiber 18, it is not necessary to 3G module 16, when without optical fiber 18, is carried out data transmission using 3G module 16
To distant place main frame.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit this utility model
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc. should be included in this utility model
Protection domain within.
Claims (6)
1. it is a kind of based on equalization measure high tension cable local discharge detection device, high tension cable include A, B, C three-phase single
Cable, and be made up of each segmentation per phase single-core cable, it is characterised in that：Also include making HF current transformer and screen layer connects
Ground wire, the screen layer of cable adjacent sectional connects respectively the shielding layer grounding line, the shielding layer grounding line of adjacent sectional
The coiling on the primary side magnetic core of the HF current transformer respectively, direction of winding conversely, and dock after be connected to ground, it is described
Output line is wound with the secondary side magnetic core of HF current transformer.
2. it is according to claim 1 based on equalization measure high tension cable local discharge detection device, it is characterised in that：
The HF current transformer includes A phase HF current transformers, B phases HF current transformer and C phase HF current transformers；
The shielding layer grounding line of A phase adjacent sectional screen layers is wound with the primary side magnetic core of the A phases HF current transformer；
The shielding layer grounding line of B phase adjacent sectional screen layers is wound with the primary side magnetic core of the B phases HF current transformer；
The shielding layer grounding line of C phase adjacent sectional screen layers is wound with the primary side magnetic core of the C phases HF current transformer；
Also include Partial Discharge Detection unit, the A phases HF current transformer, the B phases HF current transformer are high with the C phases
The secondary side magnetic core of frequency current transformer accesses the Partial Discharge Detection unit by output line respectively.
3. it is according to claim 2 based on equalization measure high tension cable local discharge detection device, it is characterised in that：
3G module is provided with the Partial Discharge Detection unit, the 3G module connects distance host by 3G antenna wireless.
4. it is according to claim 2 based on equalization measure high tension cable local discharge detection device, it is characterised in that：
The Partial Discharge Detection unit is connected with optical fiber, and the optical fiber is also connected with distance host.
5. it is according to claim 2 based on equalization measure high tension cable local discharge detection device, it is characterised in that：
Memory card interface and USB interface are provided with the Partial Discharge Detection unit.
6. it is according to claim 2 based on equalization measure high tension cable local discharge detection device, it is characterised in that：
Also include cable electricity-getting mutual inductor, the cable electricity-getting mutual inductor is for the electrical connection A phases HF current transformer, the B phases
HF current transformer, the C phases HF current transformer and the Partial Discharge Detection unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621199086.6U CN206147043U (en) | 2016-11-07 | 2016-11-07 | High tension cable partial discharge detector device based on equalization is measured |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621199086.6U CN206147043U (en) | 2016-11-07 | 2016-11-07 | High tension cable partial discharge detector device based on equalization is measured |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206147043U true CN206147043U (en) | 2017-05-03 |
Family
ID=58626050
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621199086.6U Expired - Fee Related CN206147043U (en) | 2016-11-07 | 2016-11-07 | High tension cable partial discharge detector device based on equalization is measured |
Country Status (1)
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|---|---|
| CN (1) | CN206147043U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106370988A (en) * | 2016-11-07 | 2017-02-01 | 北京汇清合源测控技术有限公司 | High voltage cable partial discharge detection device based on equalization method measurement |
| CN111983268A (en) * | 2020-09-27 | 2020-11-24 | 华润电力投资有限公司中西分公司 | High-voltage power distribution cabinet and interface device thereof |
-
2016
- 2016-11-07 CN CN201621199086.6U patent/CN206147043U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106370988A (en) * | 2016-11-07 | 2017-02-01 | 北京汇清合源测控技术有限公司 | High voltage cable partial discharge detection device based on equalization method measurement |
| CN111983268A (en) * | 2020-09-27 | 2020-11-24 | 华润电力投资有限公司中西分公司 | High-voltage power distribution cabinet and interface device thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170503 Termination date: 20181107 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |