CN109949992A - A kind of power cable with shelf depreciation self-checking function - Google Patents
A kind of power cable with shelf depreciation self-checking function Download PDFInfo
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- CN109949992A CN109949992A CN201910222864.0A CN201910222864A CN109949992A CN 109949992 A CN109949992 A CN 109949992A CN 201910222864 A CN201910222864 A CN 201910222864A CN 109949992 A CN109949992 A CN 109949992A
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Abstract
The present invention relates to a kind of power cable with shelf depreciation self-checking function, which is single-core cable or three-core cable, and the optical fiber for carrying out Partial Discharge Detection to cable is equipped with inside the single-core cable or the three-core cable.Compared with prior art, the present invention has many advantages, such as to install easy, electromagnetism interference, high sensitivity.
Description
Technical field
The present invention relates to power cable technical fields, more particularly, to a kind of electric power electricity with shelf depreciation self-checking function
Cable.
Background technique
With the development of national economy, the requirement to electric system reliability service is also higher and higher, and power cable is as electricity
The carrier of power transmission is that the primary element of composition electric system can not only involve adjacent equipment once cable breaks down, also
Heavy economic losses can be caused to user.
For the safe operation for ensureing power cable, it usually needs carry out Partial Discharge Detection, shelf depreciation examination to cable
Be cable voltage ageing performance, can effectively reflect the insulation status of power cable, especially to early detection catastrophic discontinuityfailure
Effect is obvious.Due to phenomena such as generally generating current impulse, ultrasonic wave when shelf depreciation occurs for cable, for detection physical quantity
Difference, corresponding detection method is divided into superfrequency method and supercritical ultrasonics technology etc., is required to carry out signal by additional sensor
Acquisition transmission, according to the difference of in-site installation position, be divided into external sensor and built-in sensor: external sensor
Install simple and convenient, anti-interference ability is stronger, but measurement sensitivity is weaker, and the measurement sensitivity of built-in sensor
Height, but installation requirement is also high, anti-interference ability is weaker.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind to have shelf depreciation
The power cable of self-checking function transmits signal by collecting fiber to realize Partial Discharge Detection.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of power cable with shelf depreciation self-checking function, the power cable are single-core cable or three-core cable, institute
State the optical fiber being equipped with inside single-core cable or the three-core cable for carrying out Partial Discharge Detection to cable.
Preferably, when the power cable is single-core cable, which includes the core set gradually from inside to outside
Conductor, conductor block that layer, insulating layer, layer is blocked in insulation, aluminium strip blocks layer, twining package tape, sheath.
Preferably, the optical fiber is located at the insulation and blocks layer and the aluminium strip blocks between layer.
Preferably, the fiber spiral is wrapped in the outer surface that layer is blocked in the insulation.
Preferably, when the power cable is three-core cable, which is led including interior to outer set gradually for core
Body, conductor block that layer, insulating layer, layer is blocked in insulation, aluminium strip blocks layer, packing material, twining package tape, inner sheath, steel armour, outer shield
Set.
Preferably, the optical fiber is located between the twining package tape and the inner sheath.
Preferably, the fiber spiral is wrapped in the outer surface of the twining package tape.
Compared with prior art, the invention has the following advantages that
One, optical fiber is thin and soft, is easily mounted on inside power cable and carries out signal acquisition transmission, while can guarantee measurement
Sensitivity.
Two, it is based on Faraday magnetooptical effect, by the way that the electric signal of shelf depreciation is converted to optical signal, is avoided that signal passes
Electromagnetic interference during defeated.
Three, by way of spiral winding, the distance of detection range and signal transmission is increased, signal transmission can be reduced
Loss.
Detailed description of the invention
Fig. 1 is single-core power cables transverse sectional view of the invention；
Fig. 2 is three core power cable transverse sectional views of the invention；
Fig. 3 is the transverse sectional view of optical fiber；
Fig. 4 is the Partial Discharge Detection schematic illustration of embodiment.
In diagram, 1 be cable core conductor, 2 be conductor block layer, 3 be insulating layer, 4 be insulation block layer, 5 aluminium strips block
Layer, 6 be twining package tape, 7 be sheath, 8 be packing material, 9 be inner sheath, 10 be steel armour, 11 be oversheath, 12 be optical fiber, 13 be
Optical fiber, 14 be protective layer, 15 be driving circuit, 16 be light source, 17 be the polarizer, 18 be analyzer, 19 be optical detector,
20 be signal detection system.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is a part of the embodiments of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, those of ordinary skill in the art's every other reality obtained without making creative work
Example is applied, all should belong to the scope of protection of the invention.
It is respectively single and three core power cable transverse sectional views, the structure composition of single-core cable shown in Fig. 1, Fig. 2
Be followed successively by cable core conductor 1 from inside to outside, conductor blocks layer 2, insulating layer 3, layer 4 is blocked in insulation, aluminium strip blocks layer 5, twining package tape 6,
Sheath 7 blocks layer 4 in insulation and aluminium strip blocks and is equipped with the optical fiber 12 of spiral winding between layer 5；The structure composition of three-core cable by
It is interior to be followed successively by cable core conductor 1 outside, conductor blocks layer 2, insulating layer 3, layer 4 is blocked in insulation, aluminium strip blocks layer 5, packing material 8,
Twining package tape 6, inner sheath 9, steel armour 10, oversheath 11 are equipped with the optical fiber of a spiral winding between twining package tape 6 and inner sheath 9
12。
Wherein, aluminium strip blocks layer 5 using aluminium as earthing material, electric conductivity, thermal stability, mechanical performance and corrosion resistant
Corrosion can satisfy requirement, and the cost of aluminium is lower than copper.
The view in transverse section of optical fiber 12 as shown in figure 3, optical fiber 12 is made of optical fiber 13 and protective layer 14, adopt by optical fiber 12
With silica fibre, fluorine-doped optical fiber or composite fiber.In the present embodiment, optical fiber 12 not only plays signal transmitting effect, but also simultaneously again
It is basic sensing element, under the action of the external world is measured, the lightwave signal in optical fiber 12 is modulated, specific optical parameter hair
Changing, while undertaking two functions of transmission and sensing.
Fig. 4 show the Partial Discharge Detection schematic illustration of the present embodiment, wherein driving circuit 15, light source 16 and rise
Inclined device 17 is sequentially connected composition signal source device, and analyzer 18, optical detector 19 and signal detection system 20 are sequentially connected composition
Detection device.
Before being detected, optical fiber 12 is drawn from cable mid head or cable termination.When being detected, by light
One end of fibre 12 is connected with the polarizer 17 in signal source device, and the other end is connected with the analyzer 18 in detection device.
Specific detection process are as follows: driving circuit 15 provides enough constant currents, to drive lumination of light emitting diode, while also needing
Adjust and control Output optical power；Light source 16 uses light emitting diode, directly converts electrical current into luminous energy, not hot-cast socket
Process, luminous mechanism are electroluminescent；The light issued from light source 16 generates polarised light by the polarizer 17 and send to cable.?
Under the action of magnetic field polarised light occur azimuth rotation, be incident on optical detector 19 by analyzer 18, wherein the polarizer 17 with
Angle between analyzer 18 is 45 °.It is handled through 20 analysis of signal detection system, through detection polarised light in externally-applied magnetic field
Deflection angle, to obtain shelf depreciation flow.
The present invention can apply to power transmission, and but also with local discharge detecting function, and this kind of detection mode has
Electromagnetism interference, fast response time, measurement range is wide, and wave distortion is small, and transmission loss is small, the long advantage of signal transmission distance.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (7)
1. a kind of power cable with shelf depreciation self-checking function, which is single-core cable or three-core cable, spy
Sign is, the optical fiber for carrying out Partial Discharge Detection to cable is equipped with inside the single-core cable or the three-core cable
(12)。
2. a kind of power cable with shelf depreciation self-checking function according to claim 1, which is characterized in that the electricity
When power cable is single-core cable, the single-core cable include the cable core conductor (1) set gradually from inside to outside, conductor block layer (2),
Insulating layer (3), layer (4) is blocked in insulation, aluminium strip blocks layer (5), twining package tape (6), sheath (7).
3. a kind of power cable with shelf depreciation self-checking function according to claim 2, which is characterized in that the light
Fine (12) are located at that layer (4) is blocked in the insulation and the aluminium strip blocks between layer (5).
4. a kind of power cable with shelf depreciation self-checking function according to claim 3, which is characterized in that the light
Fine (12) are spirally wound on described insulate and block the outer surface of layer (4).
5. a kind of power cable with shelf depreciation self-checking function according to claim 1, which is characterized in that the electricity
When power cable is three-core cable, which includes interior blocking layer (2), exhausted for cable core conductor (1), conductor to setting gradually outside
Edge layer (3), layer (4) is blocked in insulation, aluminium strip blocks layer (5), packing material (8), twining package tape (6), inner sheath (9), steel armour (10),
Oversheath (11).
6. a kind of power cable with shelf depreciation self-checking function according to claim 5, which is characterized in that the light
Fine (12) are located between the twining package tape (6) and the inner sheath (9).
7. a kind of power cable with shelf depreciation self-checking function according to claim 6, which is characterized in that the light
Fine (12) are spirally wound on the outer surface of the twining package tape (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910222864.0A CN109949992A (en) | 2019-03-22 | 2019-03-22 | A kind of power cable with shelf depreciation self-checking function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910222864.0A CN109949992A (en) | 2019-03-22 | 2019-03-22 | A kind of power cable with shelf depreciation self-checking function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109949992A true CN109949992A (en) | 2019-06-28 |
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ID=67011343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910222864.0A Pending CN109949992A (en) | 2019-03-22 | 2019-03-22 | A kind of power cable with shelf depreciation self-checking function |
Country Status (1)
| Country | Link |
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| CN (1) | CN109949992A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101783204A (en) * | 2009-10-29 | 2010-07-21 | 国网电力科学研究院武汉南瑞有限责任公司 | Intelligent ultrahigh-voltage XLPE power cable capable of monitoring partial discharge on line |
| CN103869224A (en) * | 2014-03-03 | 2014-06-18 | 国家电网公司 | Capacitive equipment partial discharge detection method based on optical fiber current sensor |
| CN205621480U (en) * | 2016-03-15 | 2016-10-05 | 福建南平太阳电缆股份有限公司 | Cable with self -checking function |
| CN108303625A (en) * | 2018-02-08 | 2018-07-20 | 全球能源互联网欧洲研究院 | Cable run partial discharge monitoring device, method, terminal and readable storage medium storing program for executing |
-
2019
- 2019-03-22 CN CN201910222864.0A patent/CN109949992A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101783204A (en) * | 2009-10-29 | 2010-07-21 | 国网电力科学研究院武汉南瑞有限责任公司 | Intelligent ultrahigh-voltage XLPE power cable capable of monitoring partial discharge on line |
| CN103869224A (en) * | 2014-03-03 | 2014-06-18 | 国家电网公司 | Capacitive equipment partial discharge detection method based on optical fiber current sensor |
| CN205621480U (en) * | 2016-03-15 | 2016-10-05 | 福建南平太阳电缆股份有限公司 | Cable with self -checking function |
| CN108303625A (en) * | 2018-02-08 | 2018-07-20 | 全球能源互联网欧洲研究院 | Cable run partial discharge monitoring device, method, terminal and readable storage medium storing program for executing |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190628 |
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| RJ01 | Rejection of invention patent application after publication |