CN105242181A - Bushing insulation impurity detect simulation device and manufacturing method thereof - Google Patents
Bushing insulation impurity detect simulation device and manufacturing method thereof Download PDFInfo
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- CN105242181A CN105242181A CN201510575705.0A CN201510575705A CN105242181A CN 105242181 A CN105242181 A CN 105242181A CN 201510575705 A CN201510575705 A CN 201510575705A CN 105242181 A CN105242181 A CN 105242181A
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Abstract
The invention relates to a bushing insulation impurity detect simulation device, which comprises a capacitor core and a porcelain bushing, wherein the capacitor core comprises a conductive rod, capacitance screens and insulation layers, the multiple insulation layers and the multiple layers of capacitance screens are wound on the conductive rod sequentially and alternately to form the capacitor core, the multiple layers of capacitance screens comprise a tail screen in the outermost layer, the insulation layer close to the tail screen is internally provided with a hole, and the hole is internally provided with a metal wire; and the porcelain bushing is coaxially arranged on the periphery of the capacitor core. The device is internally filled with insulation oil. According to the bushing insulation impurity detect simulation device, the hole is internally provided with the metal wire for simulating impurity detects, the insulation layer internally provided with the hole is arranged close to the tail screen so as to well transmit impurity defect partial discharge signals, the bushing insulation impurity detect simulation device is internally filled with the insulation oil so as to enable the hole to be filled with the insulation oil, real conditions of impurity detect discharge can be well simulated, and the device can be used for detection on partial discharge features of impurity detects between insulation layers and diagnosis and recognition research.
Description
Technical field
The present invention relates to sleeve technology field, particularly relate to a kind of sleeve pipe insulating impurities defects simulation device and preparation method thereof.
Background technology
Along with socioeconomic development, transformer station's quantity gets more and more, and bushing is as the necessary component of main-transformer, and quantity required is huge.The insulating property of bushing are its important performance characteristics, and manufacturing technology is coarse, production technology is bad and insulation ag(e)ing deterioration etc. factor all can cause insulation defect thus affect insulating property.The deterioration of sleeve pipe insulation defect can cause the phenomenon such as short circuit, blast to cause main-transformer trip and cause main transformer protection action, therefore evaluates, analyzes and diagnose very necessary to the state of insulation of bushing.Great majority insulation main-transformer all adopts Oil-impregnated Paper Condenser Bushing in History, and its paper oil insulation interlayer impurity defect is a kind of defect the most common.
At present, the O&M method of main transformer bushing mainly regularly carries out preventive trial, carries out the tests such as dielectric loss, electric capacity and insulation resistance to the main-transformer sleeve pipe had a power failure.These power failure prerun projects can only reflect the integral insulation situation of sleeve pipe, can not well reflect cable minor insulation defect, as the shelf depreciation defect of inside pipe casing, these shelf depreciation defects can make equally minor insulation gradually deterioration finally cause insulation breakdown and cause short circuit.Time charged for sleeve pipe the diagnosis and detection Study of recognition of inner shelf depreciation defect and research for the discharge characteristic of internal discharge feature and dissimilar defect not enough, make how at the scene live testing sleeve pipe shelf depreciation, and analyze according to discharge signal the difficult problem that electric discharge type becomes diagnosis sleeve pipe shelf depreciation defect.
Summary of the invention
Based on this, be necessary to provide a kind of sleeve pipe insulating impurities defects simulation device realizing charged research shelf depreciation and preparation method thereof.
A kind of sleeve pipe insulating impurities defects simulation device, comprise capacitor core and insulator, described capacitor core comprises conducting rod, capacitance plate and insulation course, capacitance plate described in insulation course described in multilayer and multilayer successively alternately winding on described conducting rod, form described capacitor core, described multi-layer capacity screen comprises and is arranged on outermost end shield, be provided with hole near the inside of the described insulation course of described end shield, the inside in described hole is provided with tinsel; Described insulator is with the periphery being located in described capacitor core, and insulating oil is filled in the inside of described sleeve pipe insulating impurities defects simulation device.
Above-mentioned sleeve pipe insulating impurities defects simulation device, the inside in hole is provided with tinsel simulation impurity defect, the insulation course that inside is provided with hole is arranged near end shield to propagate out preferably by impurity defect local discharge signal, the inside of sleeve pipe insulating impurities defects simulation device is filled insulating oil thus insulating oil is also filled in this hole, can simulate the truth of impurity defect electric discharge preferably.Above-mentioned sleeve pipe insulating impurities defects simulation device, can be used for sleeve pipe charged time cover pipe insulation layer be mixed with the diagnosis and detection Study of recognition of the Characteristics of Partial Discharge of matter defect, thus provide foundation for the best features amount characteristic manner of seeking sleeve pipe insulating impurities defect, namely realize on-the-spot live testing sleeve pipe shelf depreciation, and analyze electric discharge type according to the local discharge signal obtained.
Wherein in an embodiment, the described insulation course that inside is provided with described hole comprises the first insulation course and the second insulation course, described first insulation course radially offers described hole, described hole is shrinkage pool, and described first insulation course and described second insulation course roll successively and form the described insulation course that described inside is provided with hole.
Wherein in an embodiment, described hole is the rectangular parallelepiped shrinkage pool of 1 millimeters deep, 10 millimeters long, 5 mm wides.
Wherein in an embodiment, described tinsel is the bare copper wire of 10 millimeters long, 0.25 square millimeter of thick circular section, and described quantity wiry is many, the many spaced and parallel arrangements of described tinsel.
Wherein in an embodiment, the described insulation course that inside is provided with described hole be with the insulation course of described end shield direct neighbor or with described end shield not direct neighbor but close insulation course.
Wherein in an embodiment, described capacitance plate is aluminium-foil paper, and every layer of described insulation course is formed by multilayer insulation paper roll system.
Wherein in an embodiment, the number of plies of described capacitance plate is 20 layers, the insulation course that described inside is provided with hole is the insulation course between the 18th layer capacitance screen and the 19th layer capacitance shield, and the insulation course that described inside is provided with hole comprises 16 layers of insulating paper, and the 3rd to the 13rd layer of insulating paper is located in described hole.
Wherein in an embodiment, described end shield is provided with end shield lead-in wire, and described end shield lead-in wire is ground connection exit, is 320 millimeters along described conducting rod axial distance between described hole and described end shield go between.
A preparation method for sleeve pipe insulating impurities defects simulation device, comprises the following steps:
Multilayer dielectric layer and multi-layer capacity screen are replaced winding successively on conducting rod, forms capacitor core, described multi-layer capacity screen comprises and is arranged on outermost end shield, and be provided with hole in the inside of the described insulation course near described end shield, the inside in described hole is provided with tinsel;
By insulator with the periphery being located in described capacitor core; And
Insulating oil is filled in the inside of sleeve pipe insulating impurities defects simulation device.
Wherein in an embodiment, described by multilayer dielectric layer and multi-layer capacity screen successively alternately winding on conducting rod, form capacitor core, described multi-layer capacity screen comprises and is arranged on outermost end shield, and be provided with hole in the inside of the described insulation course near described end shield, the inside in described hole is provided with step wiry, is specially:
Capacitance plate described in insulation course described in multilayer and multilayer is replaced successively winding and form described capacitor core on described conducting rod, when inside is provided with the described insulation course coiling in described hole, first insulation course is wound on described capacitance plate, described first insulation course radially offers described hole, described hole is shrinkage pool, the inside in described hole is provided with described tinsel, then be wound on by the second insulation course on described first insulation course, described first insulation course and described second insulation course roll successively and form the insulation course that described inside is provided with hole.
Accompanying drawing explanation
Fig. 1 is the structural representation of the sleeve pipe insulating impurities defects simulation device of an embodiment;
The hole that Fig. 2 is the insulating impurities of sleeve pipe shown in Fig. 1 defects simulation device and structural representation wiry;
Fig. 3 is the process flow diagram of the preparation method of the sleeve pipe insulating impurities defects simulation device of an embodiment.
Embodiment
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.Preferred embodiment of the present invention is given in accompanying drawing.But the present invention can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make the understanding of disclosure of the present invention more comprehensively thorough.
It should be noted that, when element is called as " being fixed on " another element, directly can there is element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may there is centering elements simultaneously.Term as used herein " vertical ", " level ", "left", "right" and similar statement are just for illustrative purposes.
See figures.1.and.2, the sleeve pipe insulating impurities defects simulation device 100 of one embodiment, comprise capacitor core 110 and insulator (not shown), capacitor core 110 comprises conducting rod 111, capacitance plate 112 and insulation course 113, multilayer dielectric layer 113 and multi-layer capacity screen 112 replace winding successively and form capacitor core 110 on conducting rods 111, multi-layer capacity screen 112 comprises and is arranged on outermost end shield 1120, be provided with hole 1130 near the inside of the insulation course 113 of end shield 1120, the inside in hole 1130 is provided with tinsel 114; Insulator is with the periphery being located in capacitor core 110, and insulating oil (not shown) is filled in the inside of sleeve pipe insulating impurities defects simulation device 100.
Above-mentioned sleeve pipe insulating impurities defects simulation device 100, the inside in hole 1130 is provided with tinsel 114 and simulates impurity defect, the insulation course 113 that inside is provided with hole 1130 arranges to propagate out preferably by the local discharge signal of impurity defect near end shield 1120, the inside of sleeve pipe insulating impurities defects simulation device 100 is filled insulating oil thus insulating oil is also filled in this hole 1130, can simulate the truth of impurity defect electric discharge preferably.Above-mentioned sleeve pipe insulating impurities defects simulation device 100, can be used for sleeve pipe charged time cover pipe insulation layer 113 impurity defects the diagnosis and detection Study of recognition of Characteristics of Partial Discharge, thus provide foundation for the best features amount characteristic manner of seeking sleeve pipe insulating impurities defect, namely realize on-the-spot live testing sleeve pipe shelf depreciation, and analyze electric discharge type according to the local discharge signal obtained.
With reference to Fig. 1, concrete, end shield 1120 is provided with end shield lead-in wire 1121, and end shield lead-in wire 1121 is ground connection exit.In transformer operational process, end shield 1120 to be gone between 1121 ground connection by end shield.
Concrete, it is 320 millimeters that the hole 1130 of insulation course 113 and end shield to go between 1121 along conducting rod 111 axial distance L.So to propagate out preferably by the local discharge signal of impurity defect, the hole 1130 of insulation course 113 can not be too near to end shield 1120 again in order to avoid affect the Electric Field Distribution of end shield 1120.
In fact, capacitor core 110 is the capacitor of multiple concentric series connection.Be appreciated that capacitance plate 112 is for metal polar plate, insulation course 113 is the dielectric layer of capacitor.Concrete, in the present embodiment, capacitance plate 112 is aluminium-foil paper, and every layer insulating 113 is rolled by multilayer insulation paper (not shown) and forms.The number of plies of the number of plies of capacitance plate 112 and the insulating paper of every layer insulating 113 is according to field strength distribution Optimal calculation, guarantees that every layer capacitance dividing potential drop is even.
Be appreciated that capacitance plate 112 also can be the other materials such as Copper Foil paper.
Concrete, in the present embodiment, the number of plies of capacitance plate 112 is 20 layers.
Be appreciated that the insulation course 113 that inside is provided with hole 1130 can be the insulation course 113 with end shield 1120 direct neighbor, also can be and end shield 1120 not direct neighbor but close insulation course 113.
Concrete, in the present embodiment, the insulation course 113 that inside is provided with hole 1130 is the insulation course 113 that the 18th layer capacitance screen the 112 and the 19th layer capacitance shields between 112.
The insulation course 113 that inside is provided with hole 1130 comprises the first insulation course (not shown) and the second insulation course (not shown), first insulation course radially offers hole 1130, this hole 1130 is shrinkage pool, the inside in this hole 1130 is provided with tinsel 114, and the first insulation course and the second insulation course roll successively and form the inner insulation course 113 being provided with hole 1130.Shrinkage pool like this does not directly contact with the capacitance plate 112 of both sides, guarantees that again it is between two-layer capacitance plate 112.In order to easy to prepare, radially offer shrinkage pool at the first insulation course, then roll successively with the second insulation course, thus be provided with hole 1130 in the inside of insulation course 113.
With reference to Fig. 2, concrete, in the present embodiment, the hole 1130 that the first insulation course is radially offered is the rectangular parallelepiped shrinkage pool of 1 millimeters deep, 10 millimeters long, 5 mm wides.The size in hole 1130 is wanted rationally, and size too conference makes sleeve pipe puncture very soon, and the too little meeting of size makes that the office of impurity defect is high-volume too little cannot be detected.Rectangular parallelepiped shrinkage pool is also to offer hole 1130 convenience.
Be appreciated that hole 1130 that the first insulation course is radially offered also can be the shrinkage pool of other shapes such as square, semisphere.
Concrete, in the present embodiment, the insulation course 113 that inside is provided with hole 1130 comprises 16 layers of insulating paper, namely the 18th layer (according to the order rolled, namely from conducting rod 111 direction outward) and the 19th layer capacitance shield 112 between be 16 layers of insulating paper, this calculates based on the dividing potential drop under the thickness of every layer of insulating paper and service condition between every layer capacitance screen 112.
Concrete, in the present embodiment, run through and damage capacitance plate 112 to prevent hole 1130, hole 1130 is radially opened in the 3rd to the 13rd layer of insulating paper.
Concrete, tinsel 114 is copper wire.The quantity of tinsel 114 is many, and the spaced and parallel arrangement of many one metal wires 114.Be appreciated that tinsel 114 also can select the other materials such as aluminium wire, filamentary silver.
Concrete, in the present embodiment, in hole 1130, place the bare copper wire of 3 10 millimeters long, 0.25 square millimeter of thick circular section.Performance is put in the too thick office that too carefully all can have a strong impact on impurity defect of copper wire, chooses 3 10 millimeters long, the copper wire of 0.25 square millimeter is that the office of making high-volume is unlikely to too large and causes sleeve pipe to puncture, and also the office of making high-volume is unlikely to too little causing and cannot detects simultaneously.
Concrete, in the present embodiment, conducting rod 111 is aluminium conducting rod.
With reference to Fig. 3, the preparation method of the sleeve pipe insulating impurities defects simulation device of an embodiment, comprises the following steps:
Step S110: by multilayer dielectric layer and multi-layer capacity screen successively alternately winding on conducting rod, form capacitor core, multi-layer capacity screen comprises and is arranged on outermost end shield, and is provided with hole in the inside of the insulation course near end shield, and the inside in hole is provided with tinsel.
Step S110 is specially: multilayer dielectric layer and multi-layer capacity screen are replaced winding successively on conducting rod, forms capacitor core, when inside is provided with the insulation course coiling in hole, first insulation course is wound on capacitance plate, first insulation course radially offers hole, this hole is shrinkage pool, the inside in this hole is provided with tinsel, is then wound on the first insulation course by the second insulation course, the first insulation course and the second insulation course roll successively and form the inner insulation course being provided with hole.
Be appreciated that the insulation course that inside is provided with hole can be the insulation course with end shield direct neighbor, also can be and end shield not direct neighbor but close insulation course.Be appreciated that corresponding, after the insulation course being provided with hole in inside rolls, step S110 also comprises two kinds of situations: the insulation course directly capacitance plate winding being provided with hole in inside forms capacitor core; Or form capacitor core by multilayer dielectric layer and the multi-layer capacity screen insulation course that alternately winding to be provided with hole in inside successively.
Concrete, capacitance plate is aluminium-foil paper, and every layer insulating is rolled successively by multilayer insulation paper and forms.
Step S120: by insulator with the periphery being located in capacitor core.
Step S130: insulating oil is filled in the inside of sleeve pipe insulating impurities defects simulation device.Concrete, before insulating oil is filled in the inside of sleeve pipe insulating impurities defects simulation device, the inside of sleeve pipe insulating impurities defects simulation device is vacuumized.
The preparation method of above-mentioned sleeve pipe insulating impurities defects simulation device, the inside in hole is provided with tinsel simulation impurity defect, the insulation course that inside is provided with hole is arranged near end shield to propagate out preferably by the local discharge signal of impurity defect, and the inside of sleeve pipe insulating impurities defects simulation device is filled insulating oil thus insulating oil is also filled in this hole, the preparation method of above-mentioned sleeve pipe insulating impurities defects simulation device, for bushing oilpaper capacitance structure, in conjunction with actual production technique and operational defect situation, interlayer impurity defect is prepared in sleeve pipe production run, obtained sleeve pipe insulating impurities defects simulation device can simulate the truth of impurity defect electric discharge preferably, can be used for sleeve pipe charged time cover pipe insulation layer be mixed with the diagnosis and detection Study of recognition of the Characteristics of Partial Discharge of matter defect, thus provide foundation for the best features amount characteristic manner of seeking sleeve pipe insulating impurities defect, namely on-the-spot live testing sleeve pipe shelf depreciation is realized, and analyze electric discharge type according to the local discharge signal obtained.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this instructions is recorded.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.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 (10)
1. a sleeve pipe insulating impurities defects simulation device, it is characterized in that, comprise capacitor core and insulator, described capacitor core comprises conducting rod, capacitance plate and insulation course, capacitance plate described in insulation course described in multilayer and multilayer successively alternately winding on described conducting rod, form described capacitor core, capacitance plate described in multilayer comprises and is arranged on outermost end shield, and be provided with hole near the inside of the described insulation course of described end shield, the inside in described hole is provided with tinsel; Described insulator is with the periphery being located in described capacitor core, and insulating oil is filled in the inside of described sleeve pipe insulating impurities defects simulation device.
2. sleeve pipe insulating impurities defects simulation device according to claim 1, it is characterized in that, the described insulation course that inside is provided with described hole comprises the first insulation course and the second insulation course, described first insulation course radially offers described hole, described hole is shrinkage pool, and described first insulation course and described second insulation course roll successively and form the described insulation course that described inside is provided with hole.
3. sleeve pipe insulating impurities defects simulation device according to claim 2, is characterized in that, described hole is the rectangular parallelepiped shrinkage pool of 1 millimeters deep, 10 millimeters long, 5 mm wides.
4. sleeve pipe insulating impurities defects simulation device according to claim 3, it is characterized in that, described tinsel is the bare copper wire of 10 millimeters long, 0.25 square millimeter of thick circular section, and described quantity wiry is many, the many spaced and parallel arrangements of described tinsel.
5. sleeve pipe insulating impurities defects simulation device according to claim 1, is characterized in that, the described insulation course that inside is provided with described hole be with the insulation course of described end shield direct neighbor or with described end shield not direct neighbor but close insulation course.
6. sleeve pipe insulating impurities defects simulation device according to claim 1, it is characterized in that, described capacitance plate is aluminium-foil paper, and every layer of described insulation course is formed by multilayer insulation paper roll system.
7. sleeve pipe insulating impurities defects simulation device according to claim 6, it is characterized in that, the number of plies of described capacitance plate is 20 layers, the insulation course that described inside is provided with hole is the insulation course between the 18th layer capacitance screen and the 19th layer capacitance shield, the insulation course that described inside is provided with hole comprises 16 layers of insulating paper, and the 3rd to the 13rd layer of insulating paper is located in described hole.
8. sleeve pipe insulating impurities defects simulation device according to claim 1, it is characterized in that, described end shield is provided with end shield lead-in wire, and described end shield lead-in wire is ground connection exit, is 320 millimeters along described conducting rod axial distance between described hole and described end shield go between.
9. a preparation method for sleeve pipe insulating impurities defects simulation device, is characterized in that, comprise the following steps:
Multilayer dielectric layer and multi-layer capacity screen are replaced winding successively on conducting rod, forms capacitor core, described multi-layer capacity screen comprises and is arranged on outermost end shield, and be provided with hole in the inside of the described insulation course near described end shield, the inside in described hole is provided with tinsel;
By insulator with the periphery being located in described capacitor core; And
Insulating oil is filled in the inside of sleeve pipe insulating impurities defects simulation device.
10. the preparation method of sleeve pipe insulating impurities defects simulation device according to claim 9, it is characterized in that, described by multilayer dielectric layer and multi-layer capacity screen successively alternately winding on conducting rod, form capacitor core, described multi-layer capacity screen comprises and is arranged on outermost end shield, and be provided with hole in the inside of the described insulation course near described end shield, the inside in described hole is provided with step wiry, is specially:
Capacitance plate described in insulation course described in multilayer and multilayer is replaced successively winding and form described capacitor core on described conducting rod, when inside is provided with the described insulation course coiling in described hole, first insulation course is wound on described capacitance plate, described first insulation course radially offers described hole, described hole is shrinkage pool, the inside in described hole is provided with described tinsel, then be wound on by the second insulation course on described first insulation course, described first insulation course and described second insulation course roll successively and form the insulation course that described inside is provided with hole.
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| CN201510575705.0A CN105242181B (en) | 2015-09-10 | 2015-09-10 | Casing insulating impurities defects simulation device and preparation method thereof |
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Cited By (5)
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| CN107478973A (en) * | 2017-10-10 | 2017-12-15 | 国网江苏省电力公司电力科学研究院 | A kind of Oil-impregnated Paper Condenser Bushing in History experimental model device |
| CN110208669A (en) * | 2019-06-26 | 2019-09-06 | 国网浙江省电力有限公司电力科学研究院 | The device and method of insulation degradation between simulation oil immersed type capacitor panel of current transformer |
| CN110542838A (en) * | 2019-08-14 | 2019-12-06 | 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 | Destructive testing system and method for sleeve core with capacitive screen |
| CN111812196A (en) * | 2020-07-16 | 2020-10-23 | 浙江云联智能制造研究院有限公司 | Gas pipe electric spark detection equipment with gas pipe insulating layer electric leakage |
| CN113430868A (en) * | 2021-06-10 | 2021-09-24 | 哈尔滨理工大学 | Insulating paperboard with metal defects and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110208669B (en) * | 2019-06-26 | 2024-05-10 | 国网浙江省电力有限公司电力科学研究院 | Device and method for simulating insulation degradation between capacitive screens of oil-immersed current transformer |
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| CN110542838B (en) * | 2019-08-14 | 2024-01-16 | 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 | Casing core destructive testing system and method for capacitive screen |
| CN111812196A (en) * | 2020-07-16 | 2020-10-23 | 浙江云联智能制造研究院有限公司 | Gas pipe electric spark detection equipment with gas pipe insulating layer electric leakage |
| CN113430868A (en) * | 2021-06-10 | 2021-09-24 | 哈尔滨理工大学 | Insulating paperboard with metal defects and preparation method thereof |
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