CN202332393U - Symmetrically placed and freely hinged ultrahigh-voltage temperature detecting electric cable - Google Patents
Symmetrically placed and freely hinged ultrahigh-voltage temperature detecting electric cable Download PDFInfo
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- CN202332393U CN202332393U CN 201120475808 CN201120475808U CN202332393U CN 202332393 U CN202332393 U CN 202332393U CN 201120475808 CN201120475808 CN 201120475808 CN 201120475808 U CN201120475808 U CN 201120475808U CN 202332393 U CN202332393 U CN 202332393U
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- temperature detecting
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Abstract
The utility model provides a symmetrically placed and freely hinged ultrahigh-voltage temperature detecting electric cable, comprising a conductor and further comprising an inner screening layer, an insulating layer, an outer screening layer, a vertical buffer waterproof belt layer, a metal jacket layer, an anti-corrosion layer and an outer jacket layer, which are coated on the conductor in sequence from outside to inside. The symmetrically placed and freely hinged ultrahigh-voltage temperature detecting electric cable is characterized in that: at least two groups of light units are arranged between the outer screening layer and the vertical buffer waterproof belt layer along a length direction of the cable in a freely progressive manner; the vertical waterproof layer is wound at intervals with a large coarse pitch; and a wounding coarse pitch is in a range of 600-800 mm, so that an optical fiber is more stably fixed on the surface around a cable circular arc.
Description
Technical field
The utility model relate to a kind of ultrahigh voltage power cable (comprise 64/110kV, 127/220 and 290/500kV), a kind of symmetry that relates to a kind of variation function with monitoring cable serviceability temperature is specifically placed free stranded superhigh pressure temperature detection power cable.
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 with variation function of monitoring cable serviceability temperature to place free stranded superhigh pressure temperature detection power cable 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 of the utility model is placed free stranded superhigh pressure temperature detection power cable and is comprised conductor; Be wrapped in internal shield, insulating barrier, outer shielding layer, vertical buffer water-blocking band layer, metal sheath layer, anticorrosive coat and external sheath layer on the conductor from the inside to the outside successively, between said outer shielding layer and vertical buffer water-blocking band layer, freely continuing into along the employing of cable length direction, mode is provided with at least two group light unit; And said vertical water blocking layer adopts the coarse pitch compartment wrapped, and lay of lapping is at 600mm ~ 800mm, make optical fiber comparatively stable be fixed on cable circular arc circumferential surface.
Say that more specifically the symmetry of the utility model is placed free stranded superhigh pressure temperature detection power cable and can be adopted freely to continue the into manufacture of method according to the light list number of tuples of cut lengths high-tension cable.The light unit can be put four groups at most.In the technical process of superhigh pressure temperature detection power cable, for the tension force that prevents the light unit excessive with the power that is squeezed; Influence the electric parameter of light unit variation, cause optical fiber attenuation defective; The outer buffer water-blocking band coarse pitch that uses in light unit is wrapped, makes the light unit stable.The light unit adopts initiatively unwrapping wire (freely continuing into method), has eliminated light unit internal stress and has changed uneven phenomenon.Performance of products meets or is superior to the regulation of national standard fully.Accomplish the monitoring of supergrid cable operating temperature.
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; Pay special attention in process of production in the mechanical strength of optical fiber requirement; Keep the continuous and integrality of optical fiber, guarantee 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.
Through experiment proof: the optical attenuation of the utility model thermometric extra-high-tension cable light unit very I satisfied temperature sensor-based system (DTS) carries out the needs of signal processing.
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, 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 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.
Embodiment
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 of the utility model is placed free stranded superhigh pressure temperature detection power cable and is comprised conductor 1; Be wrapped in internal shield 2, insulating barrier 3, outer shielding layer 4, vertical buffer water-blocking band layer 5, metal sheath layer 7, anticorrosive coat 8 and external sheath layer 9 on the conductor from the inside to the outside successively, between said outer shielding layer and vertical buffer water-blocking band layer, freely continuing into along the employing of cable length direction, mode is provided with at least two group light unit 6; And said vertical water blocking layer adopts coarse pitch side's compartment wrapped, and lay of lapping is at 600mm ~ 800mm, make optical fiber comparatively stable be fixed on cable circular arc circumferential surface.
Claims (1)
1. a symmetry is placed free stranded superhigh pressure temperature detection power cable; It comprises conductor; Be wrapped in internal shield, insulating barrier, outer shielding layer, vertical buffer water-blocking band 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 buffer water-blocking band layer, freely continuing into along the employing of cable length direction, mode is provided with at least two group light unit; And said vertical water blocking layer adopts the coarse pitch compartment wrapped, and lay of lapping is at 600mm ~ 800mm, make optical fiber comparatively stable be fixed on cable circular arc circumferential surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120475808 CN202332393U (en) | 2011-11-25 | 2011-11-25 | Symmetrically placed and freely hinged ultrahigh-voltage temperature detecting electric cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120475808 CN202332393U (en) | 2011-11-25 | 2011-11-25 | Symmetrically placed and freely hinged ultrahigh-voltage temperature detecting electric cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202332393U true CN202332393U (en) | 2012-07-11 |
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ID=46444365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120475808 Expired - Fee Related CN202332393U (en) | 2011-11-25 | 2011-11-25 | Symmetrically placed and freely hinged ultrahigh-voltage temperature detecting electric cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202332393U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543318A (en) * | 2013-10-15 | 2014-01-29 | 华南理工大学 | Confirming method of periodic load cable conductor temperature peak value moment |
-
2011
- 2011-11-25 CN CN 201120475808 patent/CN202332393U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543318A (en) * | 2013-10-15 | 2014-01-29 | 华南理工大学 | Confirming method of periodic load cable conductor temperature peak value moment |
| CN103543318B (en) * | 2013-10-15 | 2016-04-13 | 华南理工大学 | A kind of defining method of load cycling cable conductor temperature peak value moment |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20161125 |