CN1267833A - Assembly-less stress sensor head for magneto-optical current transformer - Google Patents
Assembly-less stress sensor head for magneto-optical current transformer Download PDFInfo
- Publication number
- CN1267833A CN1267833A CN 00105939 CN00105939A CN1267833A CN 1267833 A CN1267833 A CN 1267833A CN 00105939 CN00105939 CN 00105939 CN 00105939 A CN00105939 A CN 00105939A CN 1267833 A CN1267833 A CN 1267833A
- Authority
- CN
- China
- Prior art keywords
- sensing head
- magneto
- current transformer
- glass
- head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011521 glass Substances 0.000 claims abstract description 30
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 21
- 239000004020 conductor Substances 0.000 claims abstract description 14
- 230000007704 transition Effects 0.000 claims abstract description 13
- 239000011810 insulating material Substances 0.000 claims abstract 2
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 239000000956 alloy Substances 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- 238000000034 method Methods 0.000 description 13
- 238000013461 design Methods 0.000 description 7
- 238000009413 insulation Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000002277 temperature effect Effects 0.000 description 2
- 102100040014 GH3 domain-containing protein Human genes 0.000 description 1
- 101000886770 Homo sapiens GH3 domain-containing protein Proteins 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000005355 lead glass Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000011540 sensing material Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
本发明涉及一种用于磁光式电流互感器的无组装应力传感头,由外壳、玻璃传感头和通流导体组成。通流导体置于铝合金圆筒内,二者之间隔有绝缘层,铝合金圆筒置于玻璃传感头中心的圆孔内,二者之间设有隔热材料,玻璃传感头置于密封外壳内,传感头与外壳之间设有过渡介质,过渡介质通过定位铝合金板和定位缓冲层与外壳相对定位。本发明能降低温度及双折射对块状玻璃磁光式电流互感器的影响,从而提高磁光式电流互感器的精度和稳定性。
The invention relates to a non-assembled stress sensing head for a magneto-optical current transformer, which is composed of a shell, a glass sensing head and a current-through conductor. The current-through conductor is placed in an aluminum alloy cylinder with an insulating layer between them, the aluminum alloy cylinder is placed in a round hole in the center of the glass sensor head, and a heat insulating material is arranged between the two, and the glass sensor head is placed In the sealed casing, a transition medium is provided between the sensing head and the casing, and the transition medium is positioned relative to the casing by positioning the aluminum alloy plate and the positioning buffer layer. The invention can reduce the influence of temperature and birefringence on the block glass magneto-optical current transformer, thereby improving the precision and stability of the magneto-optic current transformer.
Description
The present invention relates to a kind of assembly-less stress sensor head that is used for magneto-optical current transformer, belong to electric system metrology and measurement new technical field.This patent of invention can be used for realizing based on Faraday effect, the magneto-optical current transformer that is combined by optical device.Simultaneously, it also can be used for photoelectricity voltage mutual inductor and other devices that is combined to form by block optical device.
The insulation system of induction current transformer is very complicated, cost also can sharply increase with the raising of electric pressure.In addition and since induction current transformer intrinsic magnetic saturation, ferroresonance, dynamic range little, frequency band is narrow and the inflammable and explosive shortcoming such as fried of oil is arranged, it has been difficult to satisfy the needs that modern power systems further develops.Seeking better New type of current mutual inductor has been imperative; Therefore, people focus on the optical sensing technology to notice, develop so-called photo-electric current transformer with optoelectronic method.In the photo-electric current transformer, one type that employing is the widest at present, result of use is best is magneto-optical current transformer.
The birefringence problem that temperature causes is the research difficult point and the emphasis of magneto-optical current transformer, and each seminar has all carried out many researchs to this in the world, but does not still have thorough head it off.It is sensing head that the temperature of solution magneto-optical current transformer and birefringence influence its key of problem, and its performance directly has influence on the success or not of magneto-optical current transformer.For the magneto-optical current transformer sensing head that constitutes by the magneto-optic glass piece, because the structure more complicated of magneto-optic glass sensing head, still do not have maturation method at present, can be used for eliminating the birefringence influence that temperature causes in the block glass magneto-optic formula of the closed loop current transformer.
Eliminate the caused birefringence influence of temperature, relatively effective method is the scheme that adopts the double light path output of Wo Lasi prism, utilize and have characteristic direction (linearly polarized light is parallel to characteristic direction retention wire polarization still when the media) in the linear birefrigence media, calculate the birefringence influence coefficient, measurement result is revised, to eliminate temperature effect.But the method is not applied in the actual device, and the method requirement exists on the basis of characteristic direction in determining the linear birefrigence media, determines the birefringence influence coefficient.In fact, because the characteristic direction of the birefringence media that temperature variation causes is uncertain, thereby said method is not obtained practical application.In addition, also same block of magneto-optic glass can be cut in half, recombinant can reduce the birefringent influence that temperature causes together like this behind the half-twist
[4]But the method is all had higher requirement to processing, the assembling of sensing head, is difficult to accomplish practicability.
The objective of the invention is to propose a kind of assembly-less stress sensor head that is used for magneto-optical current transformer, it can reduce temperature and the birefringence influence to the block glass magneto-optic formula of closed loop current transformer, thereby improves the precision and the stability of magneto-optical current transformer.
The assembly-less stress sensor head that is used for magneto-optical current transformer of the present invention's design is made up of shell, glass blocks sensing head and through-flow conductor.Through-flow conductor places in the aluminum alloy drum, be separated with insulation course between the two, aluminum alloy drum places in the circular hole at glass blocks sensing head center, be provided with heat-barrier material between the two, the glass blocks sensing head places in the can, be provided with transition medium between sensing head and the shell, transition medium is by location aluminium alloy plate and location cushion and shell relative positioning.
The assembly-less stress sensor head that is used for magneto-optical current transformer of the present invention's design, by sensing material being carried out samming and reducing it with extraneous rate of heat exchange, avoid producing excessive thermograde, thus the transient state birefringence that stress birefrin that the assemble method elimination assembling of employing assembly-less stress sensor head causes and temperature produce.Therefore, the measuring error of the magneto-optical current transformer of realizing with the present invention can not exceed the degree of accuracy scope of 0.5 grade of current transformer defined.
Description of drawings:
Fig. 1 is an assembly-less stress sensor head package assembly synoptic diagram.
Fig. 2 is the geometry of block glass sensing head.
Among Fig. 1 and Fig. 2, the 1st, glass blocks sensing head, the 2nd, housing main body, the 3rd, location aluminium alloy plate, the 4th, transition medium, the 5th, location aluminium alloy plate, the 6th, transition medium, the 7th, insulation course, the 8th, through-flow conductor, the 9th, retainer spring, the 10th, side dog screw, the 11st, location cushion, the 12nd, fixed orifice, the 13rd, sensing head plane of light incidence, the 14th, optical fiber, the 15th, incident lens fixed mount, the 16th, the polarizer, the 17th, glass sensing head bottom surface reference field, the 18th, polarizer fixed mount, the 19th, analyzer, the 20th, sensing head beam projecting face, the 21st, gusset, the 22nd, soft heat-barrier material, the 23rd, aluminum alloy drum.
As shown in Figure 1, the assembly-less stress sensor head that is used for magneto-optical current transformer of the present invention's design is made up of shell 2, glass blocks sensing head 1 and through-flow conductor 8.Through-flow conductor 8 places in the aluminum alloy drum 23, be separated with insulation course 7 between the two, aluminum alloy drum 23 places in the circular hole at glass blocks sensing head 1 center, be provided with heat-barrier material between the two, glass blocks sensing head 1 places in the can 2, be provided with transition medium 6 between sensing head and the shell, transition medium 6 is by location aluminium alloy plate 5 and location cushion and shell relative positioning.
Below in conjunction with accompanying drawing, introduce content of the present invention in detail:
The serviceability of magneto-optical current transformer depends primarily on sensing head structural design and assemble method thereof.The present invention has designed sensing head assembly-less stress structure on closed loop magneto-optical current transformer glass sensing head geometric phase compensation method basis.
Fig. 1 shows assembly-less stress sensor head package assembly synoptic diagram, during the actual assembled sensing head, shell 2 and sensing head input face 13 with sensing head, sensing head output face 20, the face that sensing head bottom surface 17 joins is as reference field, sensing head 1, transition medium 4,6 and shell 2 threes of sensing head between do not paste, allow other parts of sensing head to keep movable relatively with the shell of sensing head, the stress that causes because of the expanded size difference when guaranteeing their temperature variation is minimum, but must guarantee the input face of sensing head, output face and bottom surface are invariable with the relative position of reference field; The polarizer 16, analyzer 19, the fixing of input and output lens 15 are all pasted fixing with above-mentioned reference field as a reference, but their bearing must adopt and sensing head shell identical materials, can not adopt screw fastening, to reduce the deformation that reference field is caused by external force.
Transition medium ZF6 seals block glass sensing head around sensing head, power with suitable size is effectively located from three directions perpendicular to reference field glass sensing head, transition medium and aluminum alloy casing, concerning the glass sensing head, these power should evenly distribute, and its stress birefrin influence is enough little.Effectively locate of retainer spring 9 and dog screw 10 generations of required power in these three directions by the particular design on the shell; For the power that retainer spring 9 and dog screw 10 are produced evenly distributes on sensing head, the spy has set up three location aluminium alloy plates 3,5; Dog screw is to location aluminium alloy plate Primary Location, and simultaneously retainer spring played the role of positioning; Be provided with location cushion 11 between location aluminium alloy plate and the dog screw, open the destruction that shrinkage produces to avoid heat.Because the said fixing method, need not paste and the measure of trip bolt, allow other parts of sensing head to be free to slide with respect to three reference fields.
Among the figure, between current 8 and glass sensing head 1, at first put insulation course 7 and make conductor and miscellaneous part insulation, insulation course 7 overcoat aluminum alloy drums 23 then, in order to fixed conductor and shell, and the heating of conductor had a buffer action, aluminum alloy drum 23 outside, in the glass sensing head 1, overlap the heat-barrier material 22 of one deck softness at last in order to the temperature effect of insulated conductor to the glass sensing head.Wherein, gusset 21 is used for strengthening the intensity of housing main body 1, and fixed orifice 2 is used for fixing sensing head.
The sensing head enclosure designs should also be noted that the rigidity that keeps reference field except above-mentioned consideration, to reduce because of whole sensing head deadweight or suffered power produces fixedly the time later on deformation.On enclosure designs, increase by two gussets 21.The aluminium alloy bearing of lens and polarizer directly pastes on the bottom surface reference field 17 with epoxy resin.
Fig. 2 is the geometry figure of block glass sensing head.This structure is commonly referred to as monoblock geometric phase compensation magneto-optical current transformer sensing head structure, and the problem that it mainly solves is how to make light also can keep its linear polarization characteristic around through-flow one week of conductor.Because along rectilinear propagation, sensing head must make light ray propagation direction wherein change to light in some way in identical media, method commonly used is to use total reflection.When linearly polarized light on two kinds of different interfaces total reflection takes place, to produce phase differential between parallel two mutual vertical electric vector components with perpendicular to the plane of incidence, make linearly polarized light become elliptically polarized light, thereby influenced measuring accuracy.The geometric phase penalty method is eliminated the influence of phase differential more cleverly: when allowing the linearly polarized light direction of propagation change 90 ° of angles, make between orthogonal two components the big or small identical of after through twice total reflection phase shift, and total phase differential to offset just be zero.
Consider the complexity of actual processing among the figure, taking reflection angle is 45 °, this moment block glass sensing head geometry as shown in Figure 2, material attach most importance to lead glass ZF6 or ZF7 select primes for use.Four reflecting surface LPNM, PQKI, NRDE, GHDC and incident surface A BCO and reflecting surface IJFO processing request height require to reach smooth finish 12, and the angle of each reflecting surface requires also very high, and error is not more than ± and 0.01 °.This sensing head is to the linearly polarized light of any polarization direction perpendicular to plane of incidence incident, and through six total reflections and around lead after one week, output light still is linearly polarized light.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00105939 CN1267833A (en) | 2000-04-21 | 2000-04-21 | Assembly-less stress sensor head for magneto-optical current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00105939 CN1267833A (en) | 2000-04-21 | 2000-04-21 | Assembly-less stress sensor head for magneto-optical current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1267833A true CN1267833A (en) | 2000-09-27 |
Family
ID=4578036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00105939 Pending CN1267833A (en) | 2000-04-21 | 2000-04-21 | Assembly-less stress sensor head for magneto-optical current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1267833A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101231308B (en) * | 2001-03-30 | 2011-08-24 | 奥马萨瓦尔集团股份有限公司 | High-voltage insulated modular connection system with current and voltage detector |
-
2000
- 2000-04-21 CN CN 00105939 patent/CN1267833A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101231308B (en) * | 2001-03-30 | 2011-08-24 | 奥马萨瓦尔集团股份有限公司 | High-voltage insulated modular connection system with current and voltage detector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0475470B2 (en) | ||
| CN106526277A (en) | Novel optical path sensing unit for low-voltage optical current sensor | |
| CN1267833A (en) | Assembly-less stress sensor head for magneto-optical current transformer | |
| CN102590577B (en) | Full-optical fiber heterodyning current sensor | |
| KR920006361B1 (en) | Magnetic optical memory device | |
| JPH02254648A (en) | magneto-optical disk | |
| CN113126007B (en) | An online measurement device and method for oil-immersed transformer leakage magnetic field | |
| Bell Jr | Mueller matrix: an experimental and analytical tool for magneto-optics | |
| JPS5913964A (en) | Light interference device utilizing dependency of magnetic fluid on refractive index and magnetic field | |
| JP3044084B2 (en) | Magneto-optical element for magnetic field sensor | |
| Chen et al. | Recent development of optical electric current transformer and its obstacles | |
| JPS5930255A (en) | Magnetooptic head | |
| Judy et al. | Large longitudinal Kerr rotations and figures of merit in thin iron films | |
| JPS61212773A (en) | light sensor | |
| Ning et al. | Review of optical current sensors using bulk-glass sensing elements | |
| CN109669065A (en) | The voltage measurement method realized based on bar shaped radial polarisation grating | |
| JP3065142B2 (en) | Optical magnetic field sensor | |
| CN109521248A (en) | The voltage measurement method realized based on S wave plate | |
| JPS6035349A (en) | Photomagnetic reproducing device | |
| Yoshino et al. | Polygonal Faraday effect current sensor with polarization-preserving dielectric mirrors | |
| CN2319815Y (en) | Double incident optical path reverse type optical current sensor head | |
| JPS6162882A (en) | Magnetic field detector | |
| JPS5996551A (en) | Reproducing device of photomagnetic recording body | |
| Runyu et al. | Three-Dimensional Magnetic Field Sensor Based on Magneto-Optical Crystal for Internal Monitoring of Power Equipment | |
| CN115980430A (en) | Birefringence Compensation Method of Stress Line in Optical Current Sensor Based on Crystal Splitter Interferometry and Peak Detection Circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |