CN103439780A - Method and system for reasonably laying optical fibers and power cables - Google Patents
Method and system for reasonably laying optical fibers and power cables Download PDFInfo
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- CN103439780A CN103439780A CN201310342876XA CN201310342876A CN103439780A CN 103439780 A CN103439780 A CN 103439780A CN 201310342876X A CN201310342876X A CN 201310342876XA CN 201310342876 A CN201310342876 A CN 201310342876A CN 103439780 A CN103439780 A CN 103439780A
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Abstract
The invention provides a method and system for reasonably laying optical fibers and power cables. The sensitivity of the current operating environment of the power cables and the optical fibers to vibration waves is detected, the attenuation characteristic of optical fiber spreading vibration waves is calculated, according to the data, the maximum distance that the vibration of the power cables can be detected by the optical fibers is calculated, the current distribution mode of the power cables is distinguished, and according to threshold distance and the current power cable distribution mode, the reasonable laying mode of the optical fibers and the power cables is determined. According to the method for reasonably laying the optical fibers and the power cables, on three high-voltage power cable lines of a circuit, according to the spreading attenuation characteristic of the cable breakdown vibration waves on the media among the cables and the sensitivity of the distributed optical fibers to the vibration wave strength, the space distribution of the high-voltage power cables is combined, and a distributed optical fiber laying mode is selected. The method for reasonably laying the optical fibers and the power cables can select the number of the laid optical fibers according to different conditions, avoids material waste, and saves materials.
Description
Technical field
The present invention relates to the power cable technical field, particularly relate to the method and system that optical fiber and power cable rationally lay.
Background technology
At present, domestic had the scholar to propose to utilize distributed fiber Rayleigh to be casually arranged with the method that principle positions Faults of High Voltage Electric Power Cable, and obtained in practice certain application, its positioning principle is, when certain position of sensor fibre is vibrated or pressure while changing, the phase place of sensor fibre inner laser signal can change, and by phase differential, can calculate trouble spot and the distance that applies signaling point.
Utilizing said method to carry out localization of fault has individual prerequisite, must allow exactly optical fiber along with cable trace lays, and the vibration wave that the fault high voltage power cable then optical fiber detected punctures generation passes in computing machine.
At present, domestic also do not have in the situation for three high voltage power cables in loop, optical fiber is specialized in the laying method of high voltage power cable, if directly adopt, to every power cable, all parallel being close to laid optical fiber, just need to lay 3 power cables simultaneously, will inevitably cause so a large amount of wastes of optical fiber, and a large amount of unreasonable use of optical fiber will inevitably make the implementation cost of whole localization method greatly increase.
Summary of the invention
Based on this, be necessary for utilizing distributed fiber Rayleigh to be casually arranged with principle, in the high voltage power cable situation of three, a loop, in the method that the power cable fault point is positioned, the unreasonable problem of laying a large amount of wastes that cause fiber optic materials of optical fiber, the method and system that provides a kind of optical fiber and power cable rationally to lay, to realize rationally laying of optical fiber and power cable, save material.
A kind of method that optical fiber and power cable rationally lay comprises step:
Detect the sensitivity to vibration wave of the current running environment of power cable and optical fiber, calculate the attenuation characteristic of spread fiber vibration wave under current running environment, wherein, the current running environment of described power cable comprises soil, tunnel and pipeline environment;
Sensitivity according to the attenuation characteristic of described spread fiber vibration wave and described optical fiber to vibration wave, calculate the ultimate range that described optical fiber can detect the vibration of described power cable, defining the ultimate range that described optical fiber can detect described power cable vibration is threshold distance;
The current distribution mode of identification power cable, wherein, the current distribution mode of described power cable comprises that space distribution and same plane distribute;
According to described threshold distance and the current distribution mode of described power cable, determine the reasonable system of laying of optical fiber and power cable.
The system that a kind of optical fiber and power cable rationally lay comprises:
The detection computations module, sensitivity for detection of the current running environment of power cable and optical fiber to vibration wave, the attenuation characteristic of calculating spread fiber vibration wave under current running environment, wherein, the current running environment of described power cable comprises soil, tunnel and pipeline environment;
The threshold distance computing module, for the sensitivity to vibration wave according to the attenuation characteristic of described spread fiber vibration wave and described optical fiber, calculate the ultimate range that described optical fiber can detect the vibration of described power cable, defining the ultimate range that described optical fiber can detect described power cable vibration is threshold distance;
The distribution mode identification module, for identifying the current distribution mode of power cable, wherein, the current distribution mode of described power cable comprises that space distribution and same plane distribute;
The system of laying determination module, for according to described threshold distance and the current distribution mode of described power cable, determine the reasonable system of laying of optical fiber and power cable.
The method and system that optical fiber of the present invention and power cable rationally lay, on the high voltage power cable circuit of three, a loop, susceptibility according to propagation attenuation characteristics and the distributed optical fiber vibration intensity of wave of cable breakdown vibration wave medium between cable, in conjunction with the space distribution of high voltage power cable, select the distribution type fiber-optic system of laying.The method that whole optical fiber rationally lays from power cable can be selected to lay the optical fiber radical according to different situations, avoids the waste of material, has saved material.
The accompanying drawing explanation
Fig. 1 is schematic flow sheet in first embodiment of method of rationally laying of optical fiber of the present invention and power cable;
Fig. 2 is schematic flow sheet in second embodiment of method of rationally laying of optical fiber of the present invention and power cable;
Fig. 3 is structural representation in first embodiment of system of rationally laying of optical fiber of the present invention and power cable;
Fig. 4 is structural representation in second embodiment of system of rationally laying of optical fiber of the present invention and power cable;
Fig. 5 is when power cable is space distribution, the structural representation of one of them embodiment that simple optical fiber and power cable rationally lay;
Fig. 6 is for when power cable is space distribution, the structural representation of one of them embodiment that two optical fiber and power cable rationally lay;
Fig. 7 is for when power cable is space distribution, the structural representation of one of them embodiment that three optical fiber and power cable rationally lay;
Fig. 8 is when power cable is the same plane distribution, the structural representation of one of them embodiment that single fiber and power cable rationally lay;
Fig. 9 is when power cable is the same plane distribution, the structural representation of one of them embodiment that two optical fiber and power cable rationally lay;
Figure 10 is when power cable is the same plane distribution, the structural representation of one of them embodiment that three optical fiber and power cable rationally lay.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below reach with reference to the accompanying drawings embodiment, the present invention is further elaborated.Should be appreciated that concrete enforcement described herein, only in order to explain the present invention, does not limit the present invention.
As shown in Figure 1, a kind of method that optical fiber and power cable rationally lay comprises step:
S200: detect the sensitivity to vibration wave of the current running environment of power cable and optical fiber, calculate the attenuation characteristic of spread fiber vibration wave under current running environment, wherein, the current running environment of described power cable comprises soil, tunnel and pipeline environment;
S400: the sensitivity according to the attenuation characteristic of described spread fiber vibration wave and described optical fiber to vibration wave, calculate the ultimate range that described optical fiber can detect the vibration of described power cable, defining the ultimate range that described optical fiber can detect described power cable vibration is threshold distance;
S600: the current distribution mode of identification power cable, wherein, the current distribution mode of described power cable comprises that space distribution and same plane distribute;
S800: according to described threshold distance and the current distribution mode of described power cable, determine the reasonable system of laying of optical fiber and power cable.
The method that optical fiber of the present invention and power cable rationally lay, on the high voltage power cable circuit of three, a loop, susceptibility according to propagation attenuation characteristics and the distributed optical fiber vibration intensity of wave of cable breakdown vibration wave medium between cable, in conjunction with the space distribution of high voltage power cable, select the distribution type fiber-optic system of laying.The method that whole optical fiber rationally lays from power cable can be according to different situations, the optical fiber radical is laid in selection, avoid the waste of material, saved material, reduced the implementation cost that utilizes distributed fiber Rayleigh to be casually arranged with the method for principle location power cable fault.
In embodiment, described step S800 specifically comprises therein:
Obtain described threshold distance and the current distribution mode of described power cable;
When the distribution mode of described power cable is space distribution, determine on space to the every equidistant point of described power cable, calculate the distance of this point to described power cable, define this point to the distance of described power cable for measuring distance, if described measuring distance is less than described threshold distance, lay simple optical fiber, if described measuring distance is greater than described threshold distance and is less than 2 times of described threshold distances, lay two optical fiber, described measuring distance is greater than 2 times of described threshold distances, lays three optical fiber.
As shown in Figure 5, while laying simple optical fiber, simple optical fiber will be through arriving the every equidistant point of described power cable on described space.As shown in Figure 6, while laying two optical fiber, choose the square section of three power cables, the point of three power cables on square section forms a triangle, chooses the mid point on shorter two limits of the length of side, and two optical fiber will pass respectively described mid point.As shown in Figure 7, while laying three optical fiber, every power cable is the adjacent optical fiber that lays all, and be less than described threshold distance with the distance of adjacent fiber.
When the distribution mode of described power cable is the same plane distribution, calculate in three described power cables at a distance of the distance between two described power cables farthest, the distance defined between described two described power cables farthest is the first calculating distance, calculate respectively the distance between adjacent two power cables in three described power cables, defining respectively the distance between adjacent two described power cables in three power cables is that the second calculating distance and the 3rd is calculated distance, be less than 2 times of described threshold distances if described first calculates distance, lay simple optical fiber, be greater than 2 times of described threshold distances and described the second calculating distance and described the 3rd calculating apart from all being less than 2 times of described threshold distances if described first calculates distance, if described the first calculating distance is greater than 2 times of described threshold distances and described the second calculating distance and/or the described the 3rd is calculated apart from being greater than 2 times of described threshold distances, lay three optical fiber.
Below will be with a specific embodiment, and in conjunction with Fig. 5, Fig. 6, Fig. 7, Fig. 8, with 9, Figure 10 describes in detail in the method that optical fiber of the present invention and power cable rationally lay, judge and lay number of fibers and concrete system of laying.For ease of explaining, definition Fig. 5, Fig. 6, Fig. 7, Fig. 8, with 9, in Figure 10, the electric power power cable means with A, and optical fiber means with B.
Calculating failure cable, to puncture vibration wave propagation attenuation characteristics and optical fiber be R to the determined ultimate range of sensitivity double requirements of vibration wave.
When power cable is space distribution, the situation that in Fig. 5, Fig. 6 and Fig. 7, power cable is space distribution, at first study on the square section of space distribution of high voltage power cable the point definite by cable, the problem of being reached the standard grade in space is converted into the problem of Plane-point, determine on space to the every equidistant point of power cable, calculate the distance of this point to described power cable, define this point to the distance of described power cable for measuring distance r1, be the center of circle of leg-of-mutton circumscribed circle on plane to the every equidistant point of power cable on space.As shown in Figure 5, if during r1<R, lay simple optical fiber, the position in the center of circle is the position of laying of optical fiber.As shown in Figure 6, if circumradius r1 > when R and r1<2R, adopt two optical fiber to lay pattern.The mid point of getting two less limits in Atria bar limit is optical fiber lays position.As shown in Figure 7, if r1 > 2R, adopt three optical fiber to lay pattern.While adopting three optical fiber to lay pattern, the ultimate range of controlling optical fiber and high voltage power cable is less than R.
When power cable is the same plane distribution, Fig. 8, in Fig. 9 and Figure 10, power cable is that same plane distributes, calculate in three described power cables at a distance of the distance between two described power cables farthest, the distance defined between described two described power cables farthest is that the first calculating is apart from r2, calculate respectively the distance between adjacent two power cables in three described power cables, defining respectively the distance between adjacent two described power cables in three power cables is that the second calculating is calculated apart from r4 apart from r3 and the 3rd, as shown in Figure 8, if described first calculates apart from r2<2R, lay simple optical fiber, described simple optical fiber axially lays on the S shape of path and lays along three described power cables, and the width of each step and highly all be less than described threshold distance in S shape, as shown in Figure 9, if described first calculates apart from r2 > 2R and r3<2R, r4<2R, lay two optical fiber, described two optical fiber are laid in respectively between adjacent two power cables, and described optical fiber all is less than R to the distance of adjacent two described power cables, as shown in figure 10, if described the first calculating distance is greater than 2 times of described threshold distances and described the second calculating distance and/or the described the 3rd is calculated apart from being greater than 2 times of described threshold distances, lay three optical fiber, every described power cable is all adjacent is laid with single described optical fiber, and described power cable all is less than R to the distance of adjacent fiber.
As shown in Figure 2, in embodiment, described step S200 specifically comprises therein:
S220: optical fiber vibration sensing system is set, described optical fiber is connected with described optical fiber vibration sensing system;
S240: determine the current running environment of described power cable, and described optical fiber is applied to known vibration wave;
S260: obtain optical fiber by described optical fiber vibration sensing system and applying the fluctuation data that produce after known vibration wave;
S280: according to described known vibration wave and described fluctuation data, calculate described optical fiber to the sensitivity of vibration wave and under current running environment the attenuation characteristic of spread fiber vibration wave.
Utilize optical fiber vibration sensing system can be accurately, Quick Catch is to the Vibration Condition of optical fiber; load respectively known vibration wave data by test of many times; just can accurately calculate optical fiber to the sensitivity of vibration wave and under current running environment the attenuation characteristic of spread fiber vibration wave; in order further to guarantee that the accuracy that obtains data can also test of many times load identical and different vibration wave data, averaged afterwards.
In embodiment, described optical fiber vibration sensing system is distributed optical fiber vibration sensing system therein.
As shown in Figure 3, the system that a kind of optical fiber and power cable rationally lay comprises:
Threshold distance computing module 200, for the sensitivity to vibration wave according to the attenuation characteristic of described spread fiber vibration wave and described optical fiber, calculate the ultimate range that described optical fiber can detect the vibration of described power cable, defining the ultimate range that described optical fiber can detect described power cable vibration is threshold distance;
Distribution mode identification module 300, for identifying the current distribution mode of power cable, wherein, the current distribution mode of described power cable comprises that space distribution and same plane distribute;
System of laying determination module 400, for according to described threshold distance and the current distribution mode of described power cable, determine the reasonable system of laying of optical fiber and power cable.
The system that optical fiber of the present invention and power cable rationally lay, on the high voltage power cable circuit of three, a loop, susceptibility according to propagation attenuation characteristics and the distributed optical fiber vibration intensity of wave of cable breakdown vibration wave medium between cable, in conjunction with the space distribution of high voltage power cable, select the distribution type fiber-optic system of laying.The method that whole optical fiber rationally lays from power cable can be selected to lay the optical fiber radical according to different situations, avoids the waste of material, has saved material.
In embodiment, described system of laying determination module 400 specifically comprises therein:
Acquiring unit, for obtaining described threshold distance and the current distribution mode of described power cable;
The spatially distributed unit that lays, for the distribution mode when described power cable, it is space distribution, determine on space to the every equidistant point of described power cable, calculate the distance of this point to described power cable, define this point to the distance of described power cable for measuring distance, if described measuring distance is less than described threshold distance, lay simple optical fiber, if described measuring distance is greater than described threshold distance and is less than 2 times of described threshold distances, lay two optical fiber, when described measuring distance is greater than 2 times of described threshold distances, lay three optical fiber;
The plane distribution formula is laid unit, while for the distribution mode when described power cable, being the same plane distribution, calculate in three described power cables at a distance of the distance between two described power cables farthest, the distance defined between described two described power cables farthest is the first calculating distance, calculate respectively the distance between adjacent two power cables in three described power cables, defining respectively the distance between adjacent two described power cables in three power cables is that the second calculating distance and the 3rd is calculated distance, be less than 2 times of described threshold distances if described first calculates distance, lay simple optical fiber, be greater than 2 times of described threshold distances and described the second calculating distance and described the 3rd calculating apart from all being less than 2 times of described threshold distances if described first calculates distance, lay two optical fiber, if described the first calculating distance is greater than 2 times of described threshold distances and described the second calculating distance and/or the described the 3rd is calculated apart from being greater than 2 times of described threshold distances, lay three optical fiber.
As shown in Figure 4, in embodiment, described detection computations module 100 specifically comprises therein:
Setting unit 120, for optical fiber vibration sensing system is set, be connected described optical fiber with described optical fiber vibration sensing system;
In embodiment, described optical fiber vibration sensing system is distributed optical fiber vibration sensing system therein.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. the method that an optical fiber and power cable rationally lay, is characterized in that, comprises step:
Detect the sensitivity to vibration wave of the current running environment of power cable and optical fiber, calculate the attenuation characteristic of spread fiber vibration wave under current running environment, wherein, the current running environment of described power cable comprises soil, tunnel and pipeline environment;
Sensitivity according to the attenuation characteristic of described spread fiber vibration wave and described optical fiber to vibration wave, calculate the ultimate range that described optical fiber can detect the vibration of described power cable, defining the ultimate range that described optical fiber can detect described power cable vibration is threshold distance;
The current distribution mode of identification power cable, wherein, the current distribution mode of described power cable comprises that space distribution and same plane distribute;
According to described threshold distance and the current distribution mode of described power cable, determine the reasonable system of laying of optical fiber and power cable.
2. the method that optical fiber according to claim 1 and power cable rationally lay, is characterized in that, described step, according to described threshold distance and the current distribution mode of described power cable, determines that the reasonable system of laying of optical fiber and power cable specifically comprises:
Obtain described threshold distance and the current distribution mode of described power cable;
When the distribution mode of described power cable is space distribution, determine on space to the every equidistant point of described power cable, calculate the distance of this point to described power cable, define this point to the distance of described power cable for measuring distance, if described measuring distance is less than described threshold distance, lay simple optical fiber, if described measuring distance is greater than described threshold distance and is less than 2 times of described threshold distances, lay two optical fiber, if described measuring distance is greater than 2 times of described threshold distances, lay three optical fiber;
When the distribution mode of described power cable is the same plane distribution, calculate in three described power cables at a distance of the distance between two described power cables farthest, the distance defined between described two described power cables farthest is the first calculating distance, calculate respectively the distance between adjacent two power cables in three described power cables, defining respectively the distance between adjacent two described power cables in three power cables is that the second calculating distance and the 3rd is calculated distance, be less than 2 times of described threshold distances if described first calculates distance, lay simple optical fiber, be greater than 2 times of described threshold distances and described the second calculating distance and described the 3rd calculating apart from all being less than 2 times of described threshold distances if described first calculates distance, lay two optical fiber, if described the first calculating distance is greater than 2 times of described threshold distances and described the second calculating distance and/or the described the 3rd is calculated apart from being greater than 2 times of described threshold distances, lay three optical fiber.
3. the method that optical fiber according to claim 1 and 2 and power cable rationally lay, it is characterized in that, the sensitivity to vibration wave of the described step detection current running environment of power cable and optical fiber, calculate the attenuation characteristic of spread fiber vibration wave under current running environment and specifically comprise:
Optical fiber vibration sensing system is set, described optical fiber is connected with described optical fiber vibration sensing system;
Determine the current running environment of described power cable, and described optical fiber is applied to known vibration wave;
Obtain optical fiber by described optical fiber vibration sensing system and applying the fluctuation data that produce after described known vibration wave;
According to described known vibration wave and described fluctuation data, calculate described optical fiber to the sensitivity of vibration wave and under current running environment the attenuation characteristic of spread fiber vibration wave.
4. the method that optical fiber according to claim 3 and power cable rationally lay, is characterized in that, described optical fiber vibration sensing system is distributed optical fiber vibration sensing system.
5. the system that an optical fiber and power cable rationally lay, is characterized in that, comprising:
The detection computations module, sensitivity for detection of the current running environment of power cable and optical fiber to vibration wave, the attenuation characteristic of calculating spread fiber vibration wave under current running environment, wherein, the current running environment of described power cable comprises soil, tunnel and pipeline environment;
The threshold distance computing module, for the sensitivity to vibration wave according to the attenuation characteristic of described spread fiber vibration wave and described optical fiber, calculate the ultimate range that described optical fiber can detect the vibration of described power cable, defining the ultimate range that described optical fiber can detect described power cable vibration is threshold distance;
The distribution mode identification module, for identifying the current distribution mode of power cable, wherein, the current distribution mode of described power cable comprises that space distribution and same plane distribute;
The system of laying determination module, for according to described threshold distance and the current distribution mode of described power cable, determine the reasonable system of laying of optical fiber and power cable.
6. the system that optical fiber according to claim 5 and power cable rationally lay, is characterized in that, described system of laying determination module specifically comprises:
Acquiring unit, for obtaining described threshold distance and the current distribution mode of described power cable;
The spatially distributed unit that lays, for when the distribution mode of described power cable is space distribution, determine on space to the every equidistant point of described power cable, calculate the distance of this point to described power cable, define this point to the distance of described power cable for measuring distance, if described measuring distance is less than described threshold distance, lay simple optical fiber, if described measuring distance is greater than described threshold distance and is less than 2 times of described threshold distances, lay two optical fiber, described measuring distance is greater than 2 times of described threshold distances, lays three optical fiber;
The plane distribution formula is laid unit, while for the distribution mode when described power cable, being the same plane distribution, calculate in three described power cables at a distance of the distance between two described power cables farthest, the distance defined between described two described power cables farthest is the first calculating distance, calculate respectively the distance between adjacent two power cables in three described power cables, defining respectively the distance between adjacent two described power cables in three power cables is that the second calculating distance and the 3rd is calculated distance, be less than 2 times of described threshold distances if described first calculates distance, lay simple optical fiber, be greater than 2 times of described threshold distances and described the second calculating distance and described the 3rd calculating apart from all being less than 2 times of described threshold distances if described first calculates distance, lay two optical fiber, if described the first calculating distance is greater than 2 times of described threshold distances and described the second calculating distance and/or the described the 3rd is calculated apart from being greater than 2 times of described threshold distances, lay three optical fiber.
7. the system of rationally laying according to the described optical fiber of claim 5 or 6 and power cable, is characterized in that, described detection computations module specifically comprises:
Setting unit, for optical fiber vibration sensing system is set, be connected described optical fiber with described optical fiber vibration sensing system;
Loading unit, for determining the current running environment of described power cable, and apply known vibration wave to described optical fiber;
Data capture unit, applying for obtain optical fiber by described optical fiber vibration sensing system the fluctuation data that produce after described known vibration wave;
Computing unit, for according to described known vibration wave and described fluctuation data, calculate described optical fiber to the sensitivity of vibration wave and under current running environment the attenuation characteristic of spread fiber vibration wave.
8. the system that optical fiber according to claim 7 and power cable rationally lay, is characterized in that, described optical fiber vibration sensing system is distributed optical fiber vibration sensing system.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108387889A (en) * | 2018-04-04 | 2018-08-10 | 广东电网有限责任公司 | A kind of ground determines the device of power cable fore-and-aft distance |
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| WO1999058992A2 (en) * | 1998-05-07 | 1999-11-18 | Dsc Communications A/S | A power cable monitoring system |
| CN101661814A (en) * | 2009-09-22 | 2010-03-03 | 苑宝义 | Bunched optical cable |
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Effective date of registration: 20200917 Address after: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Address before: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd. |
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