CN102507043B - Optical fiber composite contact case for measuring temperature of high-voltage switch contacts and production method thereof - Google Patents
Optical fiber composite contact case for measuring temperature of high-voltage switch contacts and production method thereof Download PDFInfo
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- CN102507043B CN102507043B CN2011103759585A CN201110375958A CN102507043B CN 102507043 B CN102507043 B CN 102507043B CN 2011103759585 A CN2011103759585 A CN 2011103759585A CN 201110375958 A CN201110375958 A CN 201110375958A CN 102507043 B CN102507043 B CN 102507043B
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- optical fiber
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Abstract
The invention discloses an optical fiber composite contact case for measuring temperature of high-voltage switch contacts and a production method thereof. The optical fiber composite contact case comprises a contact case body which is provided with a chamber for holding a fixed contact. The optical fiber composite contact case is characterized by further comprising a temperature measurement insert, an optical fiber, a heat conducting insert and an optical fiber interface insert, wherein the optical fiber, the heat conducting insert and the optical fiber interface insert are all poured in the temperature measurement insert, one end of the optical fiber is connected with the optical fiber interface insert, fiber bragg grating is formed at the other end of the optical fiber and embedded in the heat conducting insert, the heat conducting insert is exposed from the temperature measurement insert, the contact case body is provided with a through hole communicated with the chamber, and the temperature measurement insert is disposed in the through hole while the heat conducting insert is capable of attaching with the fixed contact. The optical fiber composite contact case has the advantages of high precision, high interference resistance and implementing simplicity and is capable of assisting in acquiring current temperature information of the fixed contact. Further, the production method used by the optical fiber composite case is simple and easy to realize production and process in large scale.
Description
Technical field
The present invention relates to the online measuring technique field of high-tension switch gear contact, relate in particular a kind of be used to measuring optical fiber composite contact box and the preparation method of high-voltage switch contact temperature.
Background technology
The high-tension switch cabinet of generating plant, transformer station is one of critical component guaranteed the electrical power trans mission/distribution system safe and reliable operation, and the high-tension switch cabinet relation of whether working the stability of electric system, therefore guarantees that the high-tension switch cabinet reliability service is even more important.According to statistics, in the reason that electric system has an accident, there is quite a few relevant with heat problem.
In the switchgear During Process of Long-term Operation, the positions such as the high-voltage switch contact in switch cubicle, busbar shiplap joint point can make contact resistance excessive because the installation overlap joint is improper or aging usually, and cause major loop temperature anomaly.If fail, know in time this variation, continue operation, can further aggravate heating and oxidation, and generation vicious cycle, and then occur that fusing comes off such as fingertip, contact burns and the phenomenon such as adjacent insulating material is deteriorated, finally even can be on fire, have an accident, seriously even cause puncture, the serious accident such as blast.
For a long time, because the major loop of high-tension switch cabinet (mainly referring to contact arm, contact and bus) is in high potential environment, under direct measuring condition, can't solve under High-Voltage Insulation, high electronegative potential all kinds of problems such as electrical isolation, make isolating switch major loop on-line temperature monitoring is a difficult problem always.
At present, be mainly directly or indirectly to detect the major loop temperature rise by following several means: variable color sheet, infrared imaging and thermometry, bury temperature sensor thermometric or optical fiber grating temperature-measuring underground by plain conductor.Wherein, optical fiber grating temperature-measuring system has the advantages such as anti-electromagnetic interference (EMI), anticorrosive, electrical isolation and high sensitivity, is widely used in power industry.But due to the high-voltage switch contact complex structure, narrow space in contact box, increased the installation difficulty of fiber-optic grating sensor widely.In addition, for device and fixture fiber-optic grating sensor is fixed on high-voltage switch contact, can cause the contact box inner structure to change, contact reduces with the space clear distance between switch cabinet shell body, and the class of insulation descends, and has greatly increased the risk that high-voltage breakdown, short circuit occur.And if simply paste fixing, again can due to isolating switch shake into shake out, cut-off action, with the passing of time, the reason such as toy contact comes off, and causes monitoring to lose efficacy, and increases maintenance cost and operations staff's burden.
In view of this, the inventor, for the above-mentioned defect further investigation in the on-line monitoring technique of existing high-tension switch cabinet, has this case to produce then.
Summary of the invention
It is a kind of be used to measuring the optical fiber composite contact box of high-voltage switch contact temperature that the first purpose of the present invention is to provide, it can be in the situation that not additional any equipment on high-voltage switch contact or in contact box, measure the temperature of high-voltage switch contact under high voltage environment, existing air clearance reduces, the class of insulation descends or hold caducous problem owing to after at installing optical fibres grating temperature probe on busbar, installing, easily causing to solve.
In order to reach above-mentioned purpose, solution of the present invention is:
A kind ofly be used to measuring the optical fiber composite contact box of high-voltage switch contact temperature, comprise the contact box body, this contact box body has the room that can be installed with for static contact; Wherein, this optical fiber composite contact box also comprises the thermometric plug-in unit and is cast in optical fiber, heat conduction inserts and the optical fiber interface inserts in the thermometric plug-in unit, this optical fiber one end is connected with the optical fiber interface inserts, the other end is formed with fiber grating, this fiber grating is embedded in the heat conduction inserts, this heat conduction inserts is exposed to this thermometric plug-in unit, is formed with the through hole communicated with room on this contact box body, and this thermometric plug-in unit is installed with in through hole and makes this heat conduction inserts can fit in this static contact.
Further, this heat conduction inserts is formed with blind hole in an opposing side in static contact, and the outside surface except the fiber grating position on this optical fiber all is set with heat-shrinkable T bush, and the end of this fiber grating and heat-shrinkable T bush is heavy establishes in blind hole.
Further, the length of this fiber grating is 10～20mm.
Further, this through hole is cylindrical hole or truncated cone-shaped hole, and this thermometric plug-in unit also should be cylindrical or truncated cone-shaped mutually.
Further, this contact box body and thermometric plug-in unit all adopt the poured with epoxy resin moulding.
Further, this contact box body also has for static contact being fixed on to the fixedly inserts on the contact box body, and this fixedly has internal thread on inserts, the outside external thread that can be threaded with this internal thread that has on this heat conduction inserts.
The second purpose of the present invention is to provide a kind of preparation method be used to the optical fiber composite contact box of measuring high-voltage switch contact temperature, wherein, comprise the preparation process of contact box body and the preparation process of thermometric plug-in unit, the preparation of this contact box body is and molds the contact box body with room and through hole; The preparation of this thermometric plug-in unit comprises the steps:
1., pre-assembled: be embedded in the heat conduction inserts together with being connected also with optical fiber fiber grating, also the another end of optical fiber be connected and form assembly with the optical fiber interface inserts simultaneously;
2., location: will be fixed on through the assembly that prepackage prepares in casting mold;
3., cast: the liquid material of insulator body is injected in casting mold and fills up whole mold cavity;
4., curing molding: the mould of having poured into a mould is placed in curing incubator and is cured, obtain finished product after cured after the demoulding and cutting regrinding-material.
Further, this contact box body adopts the mode moulding of cast.
Further, in step pre-assembled 1., being connected between this fiber grating and optical fiber is the mode that adopts welding.
Further, in step pre-assembled 1., also be included on optical fiber the step except the sheathed heat-shrinkable T bush of outside surface of fiber grating position, and equal heavy the establishing in the blind hole of heat conduction inserts in fiber grating and heat-shrinkable T bush end, and keep the fiber grating outside surface not with the Surface Contact of heat conduction inserts.
After adopting said structure, the optical fiber composite contact box the present invention relates to, when it was fixed in the room of contact box body when static contact, this heat conduction inserts can keep good heat transmission with static contact, namely allows the heat conduction inserts have same temperature with static contact; The present invention is based on thus the fiber grating temperature sensor principle, it be take fiber grating and is sensing element, can by the spectroanalysis instrument be connected with the optical fiber interface inserts, measure easily the temperature of heat conduction inserts, so can know the temperature information of current static contact, and have that precision is high, antijamming capability is strong and implements simple characteristics; Adopt simultaneously the preparation method who the present invention relates to, it can go out above-mentioned optical fiber composite contact box by rapid shaping, and has simple effect with being easy to large-scale production processing.
The accompanying drawing explanation
Fig. 1 the present invention relates to a kind of structural representation be used to the optical fiber composite contact box preferred embodiment of measuring high-voltage switch contact temperature;
Fig. 2 is the structural representation of thermometric plug-in unit in Fig. 1;
Fig. 3 is optical fiber composite contact box shown in Figure 1 structural representation during with the assembly of static contact phase.
In figure:
Optical fiber composite contact box 100
Contact box body 1 room 11
Through hole 12 is inserts 13 fixedly
Thermometric plug-in unit 2 optical fiber 21
Heat conduction inserts 22 blind holes 221
Optical fiber interface inserts 23 fiber gratings 24
Heat-shrinkable T bush 25 static contacts 200.
Embodiment
In order further to explain technical scheme of the present invention, the present invention will be described in detail below by specific embodiment.
As shown in Figure 1 to Figure 3, its be the present invention relates to a kind of be used to measuring optical fiber composite contact box 100 preferred embodiments of high-voltage switch contact temperature.This optical fiber composite contact box 100 comprises contact box body 1 and thermometric plug-in unit 2, wherein:
This contact box body 1, the through hole 12 that has room 11 and be connected with room 11, this room 11 can be located in wherein for static contact 200, and this through hole 12 preferably adopts cylindrical hole or truncated cone-shaped hole;
This thermometric plug-in unit 2, have optical fiber 21, heat conduction inserts 22 and optical fiber interface inserts 23, this optical fiber 21, heat conduction inserts 22 and optical fiber interface inserts 23 are all that moulding by casting is in thermometric plug-in unit 2, this heat conduction inserts 22 can be made by the good material of thermal conductivity, such as in the present embodiment its adopt for metal; These optical fiber 21 1 ends are connected with optical fiber interface inserts 23, the other end is formed with fiber grating 24, this fiber grating 24 is embedded in heat conduction inserts 22, this heat conduction inserts 22 is exposed to this thermometric plug-in unit 2 and can supplies, with static contact 200, the heat transmission occur, and this thermometric plug-in unit 2 is installed with in through hole 12 and makes this heat conduction inserts 22 can fit in this static contact 200; Preferably, the length of this fiber grating 24 is 10～20mm, with through hole 12 shapes accordingly, this thermometric plug-in unit 2 is also cylindrical or truncated cone-shaped.
As further improved plan, this heat conduction inserts 22 is formed with blind hole 221 in an opposing side in static contact 200, outside surface except fiber grating 24 positions on this optical fiber 21 all is set with heat-shrinkable T bush 25, the end of this fiber grating 24 and heat-shrinkable T bush 25 is heavy establishing in blind hole 221 all, and keep fiber grating 24 outside surfaces not with the Surface Contact of heat conduction inserts 22.Based on optical fiber grating temperature-measuring, be the change in refraction of utilizing light, temperature is demarcated; If namely, with other body surface contacts, can change at the local medium contacted, thereby cause reflecting frequency spectrum, also change, namely form measuring error.So, it can allow this fiber grating 24 when sensing temperature, have highly sensitive characteristics.A kind of material as whole optical fiber composite contact box 100 is selected, and this contact box body 1 and this thermometric plug-in unit 2 all can adopt epoxy resin or other macromolecular material moulding by casting; Preferably, at the sealing part of this blind hole, can also play by the thermal shrinkable sleeve of sheathed one deck or multilayer the effect of sealing blind hole.
In addition, in order to allow, can carry out stable heat transmission between this heat conduction inserts 22 and static contact 200, this contact box body 1 also has for static contact 200 being fixed on to the fixedly inserts 13 on contact box body 1, should fixedly on inserts 13, have internal thread, on this heat conduction inserts 22, outside has external thread, this external thread can be threaded with this internal thread, thereby heat conduction inserts 22 can stably with static contact 200, be contacted and obtain the temperature information on static contact 200.
Like this, the optical fiber composite contact box 100 the present invention relates to, it is fixed on the room 11 of contact box body 1 when interior when static contact 200, and this heat conduction inserts 22 can keep good heat transmission with static contact 200, namely allows heat conduction inserts 22 have same temperature with static contact 200; The present invention is based on thus fiber grating 24 temperature sensing principles, it be take fiber grating 24 and is sensing element, can by the spectroanalysis instrument be connected with optical fiber interface inserts 23, measure easily the temperature of heat conduction inserts 22, so can know the temperature information of current static contact 200, and have that precision is high, antijamming capability is strong and implements simple characteristics.
The principle of fiber-optical grating temperature sensor is:
The reflectivity of fiber grating or the wavelength of transmission peaks are relevant with index modulation cycle and the fiber core refractive index of grating.When wideband light source incides Bragg grating, can reflect because of the change of refractive index, transmission or reflection, wherein reflection will meet bragg condition, and namely the reflection of light wavelength will meet following optical fiber equation:
In formula:
Centre wavelength for Fiber Bragg Grating;
For fiber cores district effective refractive index;
For the Bragg grating cycle.As can be known by following formula, the Bragg wavelength of Fiber Bragg Grating along with
With
Change and change any making
With
The physical process changed such as thermal load or extraneous power etc. all will make to cause reflection or the transmission peaks wave length shift of Fiber Bragg Grating.Detection by Bragg wavelength reflection or transmitted spectrum, realize the absolute monitoring of Temperature Quantity and dependent variable.Its range of sensitivity is approximately 10-11pm/ ℃, that is to say, every variation 1 degree of temperature, can cause the wavelength variations of 10 micromicrons to 11 micromicrons.
For the present invention can fully be disclosed, the present invention also provides a kind of preparation method be used to the optical fiber composite contact box 100 of measuring high-voltage switch contact temperature, and wherein, this preparation method comprises the preparation process of contact box body 1 and the preparation process of thermometric plug-in unit 2.
The preparation of this contact box body 1 is and molds the contact box body 1 with room 11 and through hole 12, and it specifically is preferably the mode that adopts moulding by casting.
The preparation of this thermometric plug-in unit 2 comprises the steps:
1., pre-assembled: fiber grating 24 is embedded in heat conduction inserts 22 together with optical fiber 21 is connected also, also the another end of optical fiber 21 is connected with optical fiber interface inserts 23 and forms assembly simultaneously; Preferably, being connected between this fiber grating 24 and optical fiber 21 is the mode that adopts welding; And in this step, also be included in the step of removing the sheathed heat-shrinkable T bush 25 of outside surface of fiber grating 24 positions on optical fiber 21, and fiber grating 24 and heat-shrinkable T bush 25 ends are heavy establishing in the blind hole 221 of heat conduction inserts 22 all, thereby and keep fiber grating 24 outside surfaces to refuse the Surface Contact of heat conduction inserts 22.
2., location: will be fixed on through the assembly that prepackage prepares in casting mold; In this step, this assembly is preferably by a fastening inserts, to be fixed in casting mold;
3., cast: the liquid material of insulator body is injected in casting mold and fills up whole mold cavity; This liquid material can adopt epoxy resin;
4., curing molding: the mould of having poured into a mould is placed in curing incubator and is cured, obtain finished product after cured after the demoulding and cutting regrinding-material.
The preparation method that employing the present invention relates to, it adopts the mode of cast, can go out above-mentioned optical fiber composite contact box 100 by rapid shaping, and has simple effect with being easy to large-scale production processing.
Above-described embodiment and graphic and non-limiting product form of the present invention and style, any person of an ordinary skill in the technical field, to its suitable variation or modification of doing, all should be considered as not breaking away from patent category of the present invention.
Claims (9)
1. one kind be used to measuring the optical fiber composite contact box of high-voltage switch contact temperature, comprises the contact box body, and this contact box body has the room that can be installed with for static contact; It is characterized in that, this optical fiber composite contact box also comprises thermometric plug-in unit and moulding by casting optical fiber, heat conduction inserts and the optical fiber interface inserts in the thermometric plug-in unit, this optical fiber one end is connected with the optical fiber interface inserts, the other end is formed with fiber grating, this fiber grating is embedded in the heat conduction inserts, this heat conduction inserts is exposed to this thermometric plug-in unit, is formed with the through hole communicated with room on this contact box body, and this thermometric plug-in unit is installed with in through hole and makes this heat conduction inserts can fit in this static contact; This heat conduction inserts is formed with blind hole in an opposing side in static contact, and the outside surface except the fiber grating position on this optical fiber all is set with heat-shrinkable T bush, and the end of this fiber grating and heat-shrinkable T bush is heavy establishes in blind hole.
2. as claimed in claim 1ly be used to measuring the optical fiber composite contact box of high-voltage switch contact temperature, it is characterized in that, the length of this fiber grating is 10～20mm.
3. as claimed in claim 1ly be used to measuring the optical fiber composite contact box of high-voltage switch contact temperature, it is characterized in that, this through hole is cylindrical hole or truncated cone-shaped hole, and this thermometric plug-in unit also should be cylindrical or truncated cone-shaped mutually.
4. as claimed in claim 1ly be used to measuring the optical fiber composite contact box of high-voltage switch contact temperature, it is characterized in that, this contact box body and thermometric plug-in unit all adopt the poured with epoxy resin moulding.
5. as claimed in claim 1 be used to measuring the optical fiber composite contact box of high-voltage switch contact temperature, it is characterized in that, this contact box body also has for static contact being fixed on to the fixedly inserts on the contact box body, should fixedly on inserts, have internal thread, the outside external thread that can be threaded with this internal thread that has on this heat conduction inserts.
6. preparation method be used to the optical fiber composite contact box of measuring high-voltage switch contact temperature, it is characterized in that, comprise the preparation process of contact box body and the preparation process of thermometric plug-in unit, the preparation of this contact box body is and molds the contact box body with room and through hole; The preparation of this thermometric plug-in unit comprises the steps:
1., pre-assembled: fiber grating is embedded in the heat conduction inserts together with an end of optical fiber is connected also, also the other end of optical fiber is connected and forms assembly with the optical fiber interface inserts simultaneously;
2., location: will be fixed on through the assembly that prepackage prepares in casting mold;
3., cast: the liquid material of insulator body is injected in casting mold and fills up whole mold cavity;
4., curing molding: the mould of having poured into a mould is placed in curing incubator and is cured, obtain finished product after cured after the demoulding and cutting regrinding-material.
7. preparation method as claimed in claim 6, is characterized in that, this contact box body adopts the mode moulding of cast.
8. preparation method as claimed in claim 6, is characterized in that, in step pre-assembled 1., being connected between this fiber grating and optical fiber is the mode that adopts welding.
9. preparation method as claimed in claim 6, it is characterized in that, in step pre-assembled 1., also be included in the step of removing the sheathed heat-shrinkable T bush of outside surface of fiber grating position on optical fiber, and fiber grating and heat-shrinkable T bush end be heavy establishing in the blind hole of heat conduction inserts all, and keep the fiber grating outside surface not with the Surface Contact of heat conduction inserts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103759585A CN102507043B (en) | 2011-11-23 | 2011-11-23 | Optical fiber composite contact case for measuring temperature of high-voltage switch contacts and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103759585A CN102507043B (en) | 2011-11-23 | 2011-11-23 | Optical fiber composite contact case for measuring temperature of high-voltage switch contacts and production method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102507043A CN102507043A (en) | 2012-06-20 |
| CN102507043B true CN102507043B (en) | 2013-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011103759585A Expired - Fee Related CN102507043B (en) | 2011-11-23 | 2011-11-23 | Optical fiber composite contact case for measuring temperature of high-voltage switch contacts and production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103913253B (en) * | 2014-04-03 | 2017-01-18 | 南京航空航天大学 | Device for packaging optical fiber grating temperature sensing probe on electric energy meter connecting terminal and integration temperature calibration method thereof |
| US10886671B2 (en) | 2017-06-13 | 2021-01-05 | Hubbell Incorporated | Power connector with integrated status monitoring |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19632732A1 (en) * | 1996-08-14 | 1998-02-19 | Sachsenwerk Ag | Temperature measuring unit with signal coupling element between heat source and temperature sensor |
| CN2768256Y (en) * | 2004-11-17 | 2006-03-29 | 常州市天创智能化技术有限公司 | Multifunctional contact box for switch cabinet |
| CN102211375A (en) * | 2011-05-26 | 2011-10-12 | 麦克奥迪（厦门）电气股份有限公司 | Method for producing insulator or contact box with temperature and/or voltage sensor |
| CN202403830U (en) * | 2011-11-23 | 2012-08-29 | 厦门Abb开关有限公司 | Optical fiber composite contact box used for measuring temperature of high-voltage switch contact |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009056475A1 (en) * | 2007-10-31 | 2009-05-07 | Abb Technology Ag | Temperature monitoring device for high-voltage and medium-voltage components |
-
2011
- 2011-11-23 CN CN2011103759585A patent/CN102507043B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19632732A1 (en) * | 1996-08-14 | 1998-02-19 | Sachsenwerk Ag | Temperature measuring unit with signal coupling element between heat source and temperature sensor |
| CN2768256Y (en) * | 2004-11-17 | 2006-03-29 | 常州市天创智能化技术有限公司 | Multifunctional contact box for switch cabinet |
| CN102211375A (en) * | 2011-05-26 | 2011-10-12 | 麦克奥迪（厦门）电气股份有限公司 | Method for producing insulator or contact box with temperature and/or voltage sensor |
| CN202403830U (en) * | 2011-11-23 | 2012-08-29 | 厦门Abb开关有限公司 | Optical fiber composite contact box used for measuring temperature of high-voltage switch contact |
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