CN202332394U - Symmetric-protection twisted extra-high voltage temperature detection power cable - Google Patents
Symmetric-protection twisted extra-high voltage temperature detection power cable Download PDFInfo
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- CN202332394U CN202332394U CN 201120475819 CN201120475819U CN202332394U CN 202332394 U CN202332394 U CN 202332394U CN 201120475819 CN201120475819 CN 201120475819 CN 201120475819 U CN201120475819 U CN 201120475819U CN 202332394 U CN202332394 U CN 202332394U
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Abstract
A symmetric-protection twisted extra-high voltage temperature detection power cable comprises a conductor, as well as an inner shielding layer, an insulation layer, an outer shielding layer, a longitudinal water-resisting layer, a metal sheath layer, an erosion resistant coating and an outer sheath layer which are sequentially wrapped on the conductor from the inside out, wherein an optical unit group is arranged between the longitudinal water-resisting layer and the metal sheath layer in a parallel metal wire protection manner; the number of the optical units is N, and the number of the metal wires is N+1; and the optical unit group is twisted in a large pitch manner, the pitch range is 1000mm-1500mm, and the twisted angle is 71-75 degrees.
Description
Technical field
The utility model relate to a kind of ultrahigh voltage power cable (comprise 64/110kV, 127/220 and 290/500kV), relate to a kind of symmetry protection of the variation function with monitoring cable serviceability temperature, stranded superhigh pressure temperature detection power cable specifically.
Background technology
At present, as intelligent electrical network rational management distribution of electrical power, fully use the limited natural resource; Become the problem that various circles of society generally are concerned about.Load is excessive, as surpassing the operating temperature limit of cable, is prone to cause cable to produce thermal losses, makes cable produce " electricity tree " when serious, causes cable insulation to puncture, and produces power grid accident.
In the cable metal shielding, add multimode fiber (meeting CCITTG651), or monomode fiber (meeting G652); Utilize distributed temperature detection technique (DTM) or be called distributed temperature sensing (DTS) technology; Utilize the heat transfer process of cable conductor and medium, through the conversion of heat conduction and light signal, detection streamer interior temperature distribution state.That is: the insulation level of the running status of detection streamer, monitoring cable insulating barrier; Can the technical matters level in the indirect reflection cables manufacturing process, judgement cable reach the useful life of expectation.
During the major part cable laying, just consider to lay the influence of ambient temperature to ampacity.In the tunnel during cabling; If cable is a multiloop, the total amount of heat that in the tunnel, produce according to the gross power of multiloop cable, the ambient temperature in the estimation cable tunnel is come the influence coefficient of account temperature to each return cable ampacity.This
The way error ratio is bigger; When variation of ambient temperature is big, can not be reflected to control end in the very first time, in time the load current of circuit is adjusted; Cause the circuit overload electric current bigger; It is overheated that long-time inner cable circuit produces, and cable finally produces thermal breakdown, causes irremediable economic loss.
In fact, no matter under the extremity of the operating state of circuit or load cataclysm, the temperature of cable all must detect.And requiring provides comparatively precise dose data to whole circuit multiple spot or whole aspect.For accurately calculating and control cable circuit maximum load factor provide reliable guarantee.
Summary of the invention
The purpose of the utility model provides a kind of symmetry protection, stranded superhigh pressure temperature detection power cable with variation function of monitoring cable serviceability temperature to existing weak point in the above-mentioned prior art just.This cable is specially adapted to a kind of monitoring means as intelligent electrical network, the control extra-high-tension cable the use of design with the life-span in, change under the situation greatly in periodic load, reach the purpose of reasonable distribution use ampacity.
The purpose of the utility model can realize through following technique measures:
The symmetry protection of the utility model, stranded superhigh pressure temperature detection power cable comprise conductor; Be wrapped in internal shield, insulating barrier, outer shielding layer, vertical water blocking layer, metal sheath layer (metal screen layer), anticorrosive coat and external sheath layer on the conductor from the inside to the outside successively; Between said outer shielding layer and vertical water blocking layer, adopt the mode of wire protection arranged side by side to be provided with light unit group; When the light unit radical in said smooth unit group was N, the wire radical was N+1; And said smooth unit group adopts the stranded mode of coarse pitch, and pitch range is controlled at 1000mm ~ 1500mm, and strand angle adopts 71o ~ 75o, to reduce the decay of optical fiber.
Gap between unit of light described in the utility model and the wire is 2mm ~ 3mm.
More specifically say; The cable of producing the utility model extrude the metallic sheath operation time; With optical fiber twine or the outer shielding layer that continues extra-high-tension cable into and vertical buffer water-blocking band layer between; Technology is paid special attention in the mechanical strength of optical fiber requirement in process of production, keeps the continuous and integrality of optical fiber, guarantees that the decay of optical fiber is no more than setting.The composition of optical fiber is: single mode or multimode fiber through cover once mould, color separation, secondary cover steel pipe, greasy for preventing water is filled in the slit in the steel pipe, the product of accomplishing the light unit becomes.According to the environment that extra-high-tension cable uses, select the oversheath of cable.Perhaps, accomplish the making of cable jacket according to the oversheath kind of user's appointment.
The purpose that the utility model adopts the mode of wire protection arranged side by side to be provided with light unit group can ensure in the mechanical strength that optical fiber requires, and keeps the continuous and integrality of optical fiber, guarantees that the decay of optical fiber is no more than setting.And the distance between control light unit and the wire, control light unit laying tension, make it in process of production with produce after tension force do not have change fully; And performance of products meets or is superior to the regulation of national standard fully.
Trial production through repeatedly proves with test: the optical attenuation of the light unit of the utility model cable is very little, and satisfied temperature sensor-based system (DTS) carries out the needs of signal processing basically.
The beneficial effect of the utility model is following:
This cable of the cable of the utility model is specially adapted to a kind of monitoring means as intelligent electrical network, and the control extra-high-tension cable reaches the purpose that reasonable distribution is used ampacity in the useful life of design, under periodic load variation situation greatly; The active platform of reasonable detection of grid running status is provided for intelligent electrical network; Make full use of, allocate, on the basis of management and monitoring power electric power network line; Be reflected to the controller end through the photoelectricity processing unit; Judge whether cable line has unusually, locatees heat generating spot fast, give the alarm and take the necessary precaution measure; And test point is accurate, highly sensitive, soft, flexibly, continue conveniently, use reliable.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
To combine embodiment (accompanying drawing) to further describe below the utility model:
As shown in Figure 1; The symmetry protection of the utility model, stranded superhigh pressure temperature detection power cable comprise conductor 1; Be wrapped in internal shield 2, insulating barrier 3, outer shielding layer 4, vertical water blocking layer 5, metal sheath layer (metal screen layer) 8, anticorrosive coat 9 and external sheath layer 10 on the conductor from the inside to the outside successively; Between said outer shielding layer 4 and vertical water blocking layer 5, adopt the mode of wire protection arranged side by side to be provided with light unit group; When light unit 7 radicals in said smooth unit group were N, wire 6 radicals were N+1; And said smooth unit group adopts the stranded mode of coarse pitch, and pitch range is controlled at 1000mm ~ 1500mm, and strand angle adopts 71o ~ 75o.
Spacing between unit of light described in the utility model and the wire is 2mm ~ 3mm.
Claims (1)
1. a symmetry protection, stranded superhigh pressure temperature detection power cable; It comprises conductor; Be wrapped in internal shield, insulating barrier, outer shielding layer, vertical water blocking layer, metal sheath layer, anticorrosive coat and external sheath layer on the conductor from the inside to the outside successively; It is characterized in that: between said outer shielding layer and vertical water blocking layer, adopt the mode of wire protection arranged side by side to be provided with light unit group, when the light unit radical in said smooth unit group was N, the wire radical was N+1; And said smooth unit group adopts the stranded mode of coarse pitch, and pitch range is controlled at 1000mm ~ 1500mm, and strand angle adopts 71o ~ 75o o
Symmetry protection according to claim 1, stranded superhigh pressure temperature detection power cable, it is characterized in that: the spacing between said smooth unit and the wire is 2mm ~ 3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120475819 CN202332394U (en) | 2011-11-25 | 2011-11-25 | Symmetric-protection twisted extra-high voltage temperature detection power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120475819 CN202332394U (en) | 2011-11-25 | 2011-11-25 | Symmetric-protection twisted extra-high voltage temperature detection power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202332394U true CN202332394U (en) | 2012-07-11 |
Family
ID=46444366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120475819 Expired - Fee Related CN202332394U (en) | 2011-11-25 | 2011-11-25 | Symmetric-protection twisted extra-high voltage temperature detection power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202332394U (en) |
-
2011
- 2011-11-25 CN CN 201120475819 patent/CN202332394U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20151125 |