CN108872806A - A method of measurement composite insulator icing degree - Google Patents
A method of measurement composite insulator icing degree Download PDFInfo
- Publication number
- CN108872806A CN108872806A CN201810578634.3A CN201810578634A CN108872806A CN 108872806 A CN108872806 A CN 108872806A CN 201810578634 A CN201810578634 A CN 201810578634A CN 108872806 A CN108872806 A CN 108872806A
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- grating
- optical fiber
- composite insulator
- strain
- icing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1218—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using optical methods; using charged particle, e.g. electron, beams or X-rays
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1245—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of line insulators or spacers, e.g. ceramic overhead line cap insulators; of insulators in HV bushings
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- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Insulators (AREA)
Abstract
The invention discloses a kind of methods for measuring composite insulator icing degree, the method is realized by being implanted into three optical fiber in the silicone rubber jacket around composite electric insulator core bar, three optical fiber is implanted into during composite insulator injects full skirt, and it is symmetrical in 120 ° along composite insulator central axis, every optical fiber includes the grating area of coverage and tail optical fiber, in the grating area of coverage, 4~20 gratings are evenly arranged on every optical fiber, wherein the last one grating is temperature-compensating grating, remaining grating is strain grating, by straining the wavelength change of grating and the wavelength change of temperature-compensating grating, full skirt is calculated because of dependent variable caused by icing, finally by the dependent variable for being implanted in full skirt measured by three optical fiber of different direction, judge the icing degree of composite insulator.The method is capable of the ice coating state of real-time monitoring composite insulator umbrella skirt, reduces artificial measurement error, while saving human resources.
Description
Technical field
The present invention relates to power transmission and transforming equipment on-line monitoring technique fields, and in particular to a kind of to utilize fiber bragg grating temperature
The method of degree and strain transducer measurement composite insulator icing degree.
Background technique
Insulator is the important equipment in transmission line of electricity, and in the extremely frigid zones of winter-spring season, insulator is extremely easy to appear
Icing phenomenon, reduces, fitting corrosion so as to cause the flashover voltage of the insulator, and serious icing phenomenon also results in insulator breakage
And the problems such as icing flashover.
Traditional icing measuring technique is mainly periodically patrolled by track walker, field observation and measurement are transmitted electricity to detect
The ice coating state of line insulator, but by the method for this sampling inspection, there are working strength height, Ice Areas to have inconvenient traffic, and
And the problem of can not achieve on-line real time monitoring.It is largely studied by domestic and foreign scholars, covering ice for insulator is monitored on-line at present
Method mainly uses image method, by installing camera on electric power line pole tower or unmanned plane, by picture and video into
Row image procossing, calculate insulator surface ice covering thickness, but re-cover ice condition snow camera be easy covered, image is unclear
It is clear, while being easy to freeze there is also mechanical transmission component, monitoring terminal supplying power cannot be stablized the problems such as continuing working.
Summary of the invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide a kind of using fiber bragg grating temperature and answers
Become the method for sensor measurement composite insulator icing degree, the method is not by electromagnetic interference, not vulnerable to environmental corrosion, measurement
Precision is high, and can be realized on-line real time monitoring.
When icing occurs for composite insulator, the surface and edge of insulator umbrella will form a large amount of ice slush, thus right
Composite insulator forms axial tension；Under different icing degree, quantity and distribution situation difference, the composite insulator institute of ice slush
The pulling force being subject to is also different, and therefore, icing degree is more serious, and it is more that full skirt surface is formed by ice slush quantity, composite insulator
The pulling force being subject to is bigger, it is possible to determine the icing shape of composite insulator by measuring the stress variation of composite insulator
State.
The purpose of the present invention can be achieved through the following technical solutions：
A method of measurement composite insulator icing degree, the method pass through the silicon around composite electric insulator core bar
Three optical fiber are implanted into rubber sheath to realize, three optical fiber is symmetrical in 120 ° along composite insulator central axis, often
Root optical fiber includes the grating area of coverage and tail optical fiber, and in the grating area of coverage, 4~20 gratings are evenly arranged on every optical fiber,
In the last one grating be temperature-compensating grating, remaining grating is strain grating, pass through strain grating wavelength change and temperature
The wavelength change of null grating is spent, calculates full skirt because of dependent variable caused by icing, finally by being implanted in three of different direction
The dependent variable of full skirt measured by optical fiber judges the icing degree of composite insulator.
Further, the implantation position of the strain grating corresponds to the anti-icing gamp and middle umbrella of composite insulator, surveys respectively
Measure the dependent variable of anti-icing gamp and middle umbrella.
Further, the strain grating region of the grating area of coverage is socketed rubber hose, rubber hose and strain in the optical fiber
Grating region is filled using binder, and temperature-compensating grating region is socketed ceramic tube and using hanging encapsulation, to guarantee structural strain not
Temperature-compensating grating can be had an impact.
Further, lead to deformation, and extraneous temperature when composite insulator umbrella skirt surface and edge form ice sheet or ice slush
Degree changes the caused wavelength change for straining grating：Δλ1=λ1(KTΔT+Kεε), wherein λ1Indicate the wavelength of strain grating,
KTIndicate the temperature sensitivity of strain grating, Δ T indicates ambient temperature variation, KεIndicate strain grating with full skirt surface and edge
Lead to the strain sensitivity of deformation because forming ice sheet or ice slush, ε indicates that full skirt surface and edge cause because forming ice sheet or ice slush
Dependent variable, Δ λ2=λ2KTΔ T, wherein λ2Indicate the wavelength of temperature-compensating grating, KTIndicate the temperature spirit of temperature-compensating grating
Full skirt is calculated because dependent variable caused by icing is in sensitivity：According to the full skirt being calculated because
Dependent variable caused by icing is compared with the dependent variable of full skirt under normal operating condition, to judge covering for composite insulator
Ice degree.
Further, the strain grating use strain transducer, the temperature-compensating grating use temperature sensor, two
Kind grating is all optical fiber Bragg raster, and two kinds of sensors all use passive sensing technology, without setting up terminal supplying power.
Further, three optical fiber is implanted into during composite insulator injects full skirt.
Compared with prior art, the present invention having the following advantages that and beneficial effect：
The method of measurement composite insulator icing degree provided by the invention, all the sensors all use passive sensing skill
Art improves the reliability of sensor without setting up terminal supplying power；Simultaneously because embedded fibers are around composite electric insulator core bar
Silicone rubber jacket in, there is good insulation performance, low temperature resistant, be not easily susceptible to the influence of icing environment, measurement accuracy and spirit
Sensitivity is higher；The method can real-time monitoring composite insulator umbrella skirt ice coating state, do not need cooperation manual inspection, reduce
Artificial measurement error, while human resources are saved, it can be used for the failure real-time detection in electric system and electric insulation field.
Detailed description of the invention
Fig. 1 is the schematic diagram of grating implantation position in composite insulator of the embodiment of the present invention.
Fig. 2 is the position side view of three embedded fibers composite insulators in the embodiment of the present invention.
Fig. 3 is the position cross-sectional view of three embedded fibers composite insulators in the embodiment of the present invention.
Fig. 4 is the encapsulation schematic diagram that grating and temperature-compensating grating are strained in the embodiment of the present invention.
Wherein, 1- silicone rubber jacket, the anti-icing gamp of 11-, umbrella in 12-, 13- umbellule, 2- plug, 3- fitting, 4- optical fiber,
41-1# optical fiber, 42-2# optical fiber, 43-3# optical fiber, 5- optical fiber Bragg raster, 51- strain grating, 52- temperature-compensating grating, 6-
Rubber hose, 7- ceramic tube, 8- binder.
Specific embodiment
Present invention will now be described in further detail with reference to the embodiments and the accompanying drawings, but embodiments of the present invention are unlimited
In this.
Embodiment：
A kind of method for measuring composite insulator icing degree is present embodiments provided, the method is anti-icing multiple in 110kV
It closes and implements on insulator, the anti-icing composite insulator mainly includes silicone rubber jacket (1), plug (2), fitting (3) and optical fiber
(4), in order to effectively monitor the three-dimensional stress constraint and its changing rule of composite insulator in the case of icing, by compound
Implantation three optical fiber (4) are realized in silicone rubber jacket (1) around core rod of insulator (2), as shown in Figures 2 and 3, including 1#
Optical fiber (41), 2# optical fiber (42) and 3# optical fiber (43), three optical fiber (4) are symmetrical in 120 ° along composite insulator central axis,
Every optical fiber (4) includes the grating area of coverage and tail optical fiber, in the grating area of coverage, is evenly arranged with 4~20 on every optical fiber (4)
Optical fiber Bragg raster (5), as shown in Figure 1, wherein the last one optical fiber Bragg raster is temperature-compensating grating (52), remaining light
Fiber Bragg grating is strain grating (51), by straining the wavelength change of grating (51) and the wave of temperature-compensating grating (52)
Long variation, calculates full skirt because of dependent variable caused by icing, finally by being implanted in umbrella measured by three optical fiber of different direction
The dependent variable of skirt judges the icing degree of composite insulator.
Specifically, the composite insulator includes anti-icing gamp (11), middle umbrella (12) and umbellule (13), wherein straining grating
(51) implantation position corresponds to the anti-icing gamp (11) and middle umbrella (12) of composite insulator, measure respectively anti-icing gamp (11) and in
The dependent variable of umbrella (12)；As shown in figure 4, the strain grating region of the grating area of coverage is socketed rubber hose (6) in the optical fiber, rubber
Hose (6) and strain grating region are filled using binder (8), are in close contact strain grating (51) and rubber hose (6), temperature
Null grating area is socketed ceramic tube (7) and using hanging encapsulation, does not use binder (8), also the tube wall not with ceramic tube (7) connects
Touching, so that guaranteeing that structural strain will not have an impact temperature-compensating grating (52) while protection grating.
Deformation and ambient temperature variation is caused to cause when composite insulator umbrella skirt surface and edge form ice sheet or ice slush
The wavelength change of strain grating be：Δλ1=λ1(KTΔT+Kεε), wherein λ1Indicate the wavelength of strain grating, KTIndicate strain
The temperature sensitivity of grating, Δ T indicate ambient temperature variation, KεIndicate strain grating with full skirt surface and edge because forming ice sheet
Or ice slush leads to the strain sensitivity of deformation, ε indicates full skirt surface and edge because of dependent variable caused by forming ice sheet or ice slush, Δ
λ2=λ2KTΔ T, wherein λ2Indicate the wavelength of temperature-compensating grating, KTThe temperature sensitivity for indicating temperature-compensating grating, calculates
To full skirt because dependent variable caused by icing is：According to the full skirt being calculated because of icing caused by
Dependent variable is compared with the dependent variable of full skirt under normal operating condition, to judge the icing degree of composite insulator.
The above, only the invention patent preferred embodiment, but the scope of protection of the patent of the present invention is not limited to
This, anyone skilled in the art is in the range disclosed in the invention patent, according to the present invention the skill of patent
Art scheme and its patent of invention design are subject to equivalent substitution or change, belong to the scope of protection of the patent of the present invention.
Claims (6)
1. a kind of method for measuring composite insulator icing degree, it is characterised in that：The method passes through in composite insulator core
Three optical fiber are implanted into silicone rubber jacket around stick to realize, three optical fiber injects the process of full skirt in composite insulator
Middle implantation, and it is symmetrical in 120 ° along composite insulator central axis, and every optical fiber includes the grating area of coverage and tail optical fiber, in grating
In the area of coverage, 4~20 gratings are evenly arranged on every optical fiber, wherein the last one grating is temperature-compensating grating, remaining
Grating is strain grating, by straining the wavelength change of grating and the wavelength change of temperature-compensating grating, calculates full skirt because covering
Dependent variable caused by ice judges compound finally by the dependent variable for being implanted in full skirt measured by three optical fiber of different direction
The icing degree of insulator.
2. a kind of method for measuring composite insulator icing degree according to claim 1, it is characterised in that：The strain
The implantation position of grating corresponds to the anti-icing gamp and middle umbrella of composite insulator, measures the dependent variable of anti-icing gamp and middle umbrella respectively.
3. a kind of method for measuring composite insulator icing degree according to claim 1, it is characterised in that：The optical fiber
The strain grating region of the middle grating area of coverage is socketed rubber hose, and rubber hose and strain grating region are filled using binder, temperature
Null grating area is socketed ceramic tube and using hanging encapsulation, to guarantee that structural strain will not have an impact temperature-compensating grating.
4. a kind of method for measuring composite insulator icing degree according to claim 1, it is characterised in that：When compound exhausted
The wavelength of strain grating caused by edge full skirt surface and edge form ice sheet or ice slush causes deformation and ambient temperature to change
Variation is：Δλ1=λ1(KTΔT+Kεε), wherein λ1Indicate the wavelength of strain grating, KTIndicate the temperature sensitivity of strain grating,
Δ T indicates ambient temperature variation, KεIndicate that strain grating leads to deformation because forming ice sheet or ice slush with full skirt surface and edge
Strain sensitivity, ε indicate full skirt surface and edge because of dependent variable caused by forming ice sheet or ice slush, Δ λ2=λ2KTΔ T, wherein
λ2Indicate the wavelength of temperature-compensating grating, KTThe temperature sensitivity for indicating temperature-compensating grating, is calculated full skirt because icing causes
Dependent variable be：According to the full skirt being calculated because of icing caused by dependent variable, with normal operation
The dependent variable of full skirt is compared under state, to judge the icing degree of composite insulator.
5. a kind of method for measuring composite insulator icing degree according to claim 1, it is characterised in that：The strain
Grating uses strain transducer, and the temperature-compensating grating uses temperature sensor, and two kinds of gratings are all optical fiber Bragg raster,
Two kinds of sensors all use passive sensing technology, without setting up terminal supplying power.
6. a kind of method for measuring composite insulator icing degree according to claim 1, it is characterised in that：Described three
Optical fiber is implanted into during composite insulator injects full skirt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810578634.3A CN108872806A (en) | 2018-06-07 | 2018-06-07 | A method of measurement composite insulator icing degree |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810578634.3A CN108872806A (en) | 2018-06-07 | 2018-06-07 | A method of measurement composite insulator icing degree |
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| Publication Number | Publication Date |
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| CN108872806A true CN108872806A (en) | 2018-11-23 |
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| CN201810578634.3A Pending CN108872806A (en) | 2018-06-07 | 2018-06-07 | A method of measurement composite insulator icing degree |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342908A (en) * | 2018-12-14 | 2019-02-15 | 国家电网有限公司 | A kind of ice-coating pre-warning method based on observation insulator |
| CN110361126A (en) * | 2019-08-12 | 2019-10-22 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of method and its sensing device for transmission line icing load monitoring |
| CN111029054A (en) * | 2019-12-09 | 2020-04-17 | 华南理工大学 | Prefabricated core rod of optical fiber composite insulator, mold and manufacturing method of prefabricated core rod |
| CN112582114A (en) * | 2020-11-24 | 2021-03-30 | 华南理工大学 | Composite insulator and method for detecting composite insulator brittle failure based on fiber bragg grating |
| CN113405898A (en) * | 2021-05-24 | 2021-09-17 | 华南理工大学 | Fiber grating monitoring composite insulator brittle failure system and crack identification method |
| CN113483678A (en) * | 2021-06-18 | 2021-10-08 | 安徽龙联智能光电有限公司 | Icing monitoring method for insulated terminal |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342908A (en) * | 2018-12-14 | 2019-02-15 | 国家电网有限公司 | A kind of ice-coating pre-warning method based on observation insulator |
| CN110361126A (en) * | 2019-08-12 | 2019-10-22 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of method and its sensing device for transmission line icing load monitoring |
| CN111029054A (en) * | 2019-12-09 | 2020-04-17 | 华南理工大学 | Prefabricated core rod of optical fiber composite insulator, mold and manufacturing method of prefabricated core rod |
| CN112582114A (en) * | 2020-11-24 | 2021-03-30 | 华南理工大学 | Composite insulator and method for detecting composite insulator brittle failure based on fiber bragg grating |
| CN113405898A (en) * | 2021-05-24 | 2021-09-17 | 华南理工大学 | Fiber grating monitoring composite insulator brittle failure system and crack identification method |
| CN113483678A (en) * | 2021-06-18 | 2021-10-08 | 安徽龙联智能光电有限公司 | Icing monitoring method for insulated terminal |
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Application publication date: 20181123 |