CN203085347U - 0.2 Ss-level special-type high-voltage measurement current mutual inductor - Google Patents
0.2 Ss-level special-type high-voltage measurement current mutual inductor Download PDFInfo
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- CN203085347U CN203085347U CN 201220681832 CN201220681832U CN203085347U CN 203085347 U CN203085347 U CN 203085347U CN 201220681832 CN201220681832 CN 201220681832 CN 201220681832 U CN201220681832 U CN 201220681832U CN 203085347 U CN203085347 U CN 203085347U
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- iron core
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- winding
- basal layer
- permalloy
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- 238000005259 measurement Methods 0.000 title abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000004804 winding Methods 0.000 claims abstract description 51
- 229910000889 permalloy Inorganic materials 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 23
- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 6
- 230000004224 protection Effects 0.000 claims description 32
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 20
- 229910052710 silicon Inorganic materials 0.000 claims description 20
- 239000010703 silicon Substances 0.000 claims description 20
- 238000012544 monitoring process Methods 0.000 claims description 8
- 238000009530 blood pressure measurement Methods 0.000 claims description 4
- 230000011218 segmentation Effects 0.000 description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model relates to a 0.2 Ss-level special-type high-voltage measurement current mutual inductor, and belongs to current mutual inductors. An iron core is formed by combining two types of L-shaped chips identical in size. The ratio of the long side to the short side of each L-shaped chip is 3:2. L-shaped chips of one type are permalloy chips. L-shaped chips of the other type are cold-rolled silicon steel chips. Needed windings are wound around all sides of the iron core. The 0.2 Ss-level special-type high-voltage measurement current mutual inductor has the advantages that the structure is novel, a part of the chips of the iron core are made of permalloy, the structural features formed by the iron core made of different materials are utilized ingeniously, compensation for the fractional number of windings of coils is formed, and therefore the purpose of accurate measurement is achieved.
Description
Technical field
The utility model belongs to a kind of extraordinary high pressure measurement current transformer.
Background technology
The a lot of circuits of transformer station often operate in small and weak electric current---and under the low-intensity magnetic field operating mode, and now under this operating mode, measure not come out, cause all kinds of Trade Measures table meters, measuring instrument, control microcomputer can't operate as normal with high-voltage mutual inductor.
This small and weak electric current is generally in thousand segmentations of instrument transformer rated current, thereby mainly form following three aspect problems: a) the conventional high-tension instrument transformer just has measurement performance in the percentage section of rated current, though error is bigger, for example 0.2S level instrument transformer just can reach more than 2/10ths ± 0.2%, and hundred be segmented into ± 0.3～± 0.8%; B) of no avail by changing no-load voltage ratio, even become 100/5A as the instrument transformer of 600/5A, the small and weak electric current of 1.2A can only be by 2 ‰ original I
NBecome 1.2% I
N, change not possibility of weak magnetic measurement performance with this, change accuracy of measurement an utterly inadequate amount especially by this; C) as the primary equipment that operates on the high-tension line, high-voltage mutual inductor is reduced to 100/5A by 600/5A,, may not be allowed to from the protection angle.
Summary of the invention
The utility model provides a kind of 0.2Ss level extraordinary high pressure measurement current transformer, often operate in small and weak electric current to solve a lot of circuits of transformer station---under the low-intensity magnetic field operating mode, and now measure not come out under this operating mode with high-voltage mutual inductor, cause all kinds of Trade Measures table meters, measuring instrument, control microcomputer can't the operate as normal problem.
The technical scheme that the utility model is taked is: iron core is formed by two kinds of same sizes " L " shape chip portfolio, and the long limit and the minor face ratio of being somebody's turn to do " L " shape chip are 3:2; Wherein a kind of " L " shape chip is a permalloy material chip, another kind of " L " shape chip is a cold rolled silicon steel material chip, concrete combining structure is: a slice permalloy sheet and a slice cold-reduced silicon sheet are assembled into the basal layer of " " shape as each layer of iron core, then odd number basal layer and even number basal layer are carried out the compartment closed assembly, described compartment closed assembly mode is that each odd number basal layer is all identical, each even number basal layer is all identical, and described even number basal layer obtains the odd number basal layer after horizontal central transverse is turned over turnback;
Twine electric energy metrical winding and monitoring winding on the long limit of permalloy sheet iron core, last 1 circle all lays out from neighbour iron core limit;
On the long limit of cold-reduced silicon sheet iron core, twine the relaying protection winding one of 5P level and the relaying protection winding two of 5P level;
Two minor faces at iron core twine the relaying protection winding three of 3P level or 5P level and the relaying protection winding four of 3P level or 5P level respectively.
A kind of execution mode of the utility model is that described permalloy is the iron-nickel alloy of nickel content 70%～81%.
The utility model has the advantages that novel structure, the segment chip of iron core adopts magnetic conductive material material--nickeliferous 70%～81% permalloy: expanded iron core new capability, realized extraordinary purpose; Design iron core closed assembly structure cleverly, take into full account structure toughness, scalability, winding purposes, technical indicator, form unique core design technology theory; Design unique coil winding mode, make full use of the characteristics that core structure forms, form " iron core+coil " error compensating method of different windings, the design feature of promptly utilizing the unlike material iron core to form dexterously, form the mark turn compensation of coil, thereby reach the purpose of accurate measurement.
The key technical indexes of this patent:
A) primary voltage: 220/110/66/35 kV;
B) rated transformation ratio: 600/300/150/5 A; 2000/1000/1A;
C) level time combination: 0.2Ss, 0.2Ss(0.5Ss), 3(5) P, 3(5) P, 5P, 5P;
D) products characteristics: just have accurately in thousand segmentations of rated current that measurement performance, error can reach ± 0.2%, i.e. thousand segmentations from rated current begin, just Trade Measures, monitoring normally, protection control reliably exactly.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of the utility model " L " shape permalloy material chip;
Fig. 3 is the structural representation of the utility model " L " shape cold rolled silicon steel material chip;
Fig. 4 is that the utility model a slice permalloy sheet and a slice cold-reduced silicon sheet are assembled into " " shape, as the structural representation of the basal layer of each layer of iron core;
Fig. 5 is the structural representation of the utility model iron core.
Embodiment
The explanation of nouns that the utility model is related: the implication of " 0.2Ss level ": the implication of " 0.2S " shows that its accuracy of measurement has reached the rules requirement of 0.2S level high-voltage mutual inductor, and second " s " illustrates that this high-voltage mutual inductor can measure thousand segmentations of rated current exactly.
The following embodiment of the utility model is that to be with five basal layers that example is come illustrational, but the utility model basal layer is not limited only to five.
The relaying protection winding of 3P level described in the utility model and the relaying protection winding of 5P level are the public knowledge technology in this area.
Iron core is formed by " L " shape chip portfolio of two kinds of same sizes, and the long limit and the minor face ratio of being somebody's turn to do " L " shape chip are 3:2; Wherein a kind of " L " shape chip is a permalloy material chip 1, another kind of " L " shape chip is a cold rolled silicon steel material chip 2, concrete combining structure is: a slice permalloy sheet and a slice cold-reduced silicon sheet are assembled into the basal layer of " " shape as each layer of iron core, then odd number basal layer and even number basal layer are carried out the compartment closed assembly, described compartment closed assembly method is that each odd number basal layer is all identical, each even number basal layer is all identical, and described even number basal layer obtains the odd number basal layer after horizontal central transverse is turned over turnback;
Twine electric energy metrical winding 3 and monitoring winding 4 on the long limit of permalloy sheet iron core, last 1 circle all lays out from neighbour iron core limit;
On the long limit of cold-reduced silicon sheet iron core, twine the relaying protection winding 1 of 5P level and the relaying protection winding 26 of 5P level;
Two minor faces at iron core twine the relaying protection winding 37 of 3P or 5 P levels and the relaying protection winding 48 of 3P level or 5P level respectively.
Permalloy described in the present embodiment is the iron-nickel alloy of nickel content 70%.
Permalloy described in the present embodiment is the iron-nickel alloy of nickel content 75%, and all the other structures are with embodiment 1.
Embodiment 3
Permalloy described in the present embodiment is the iron-nickel alloy of nickel content 81%, and all the other structures are with embodiment 1.
Below in conjunction with accompanying drawing utility model is described further.
Fig. 2 and Fig. 3 illustrate the performance and the simple process thereof of two kinds of material chips: the iron core of high-voltage mutual inductor adopts the cold-reduced silicon sheet closed assembly always, but it does not almost have magnetic property in rated current thousand segmentations; In order to realize small and weak electric current--the measurement performance of high-tension current inductor under the low-intensity magnetic field operating mode, need to adopt permalloy to make iron core, but permalloy is not only very expensive, and also also very bad with its winding anti-saturation performance of making iron core.So the iron core of making high-voltage mutual inductor can not all adopt expensive permalloy, the anti-saturation performance for the relaying protection winding also should not all adopt permalloy simultaneously.
So the utility model adopts permalloy sheet and cold-reduced silicon sheet to carry out closed assembly dexterously, the different sections that make the same complete iron core of high-voltage mutual inductor are unlike material, different magnetic property and the measurement performances of performance.Two kinds of material chip manufacturings become the same size, help unified manufacture craft, also help closed assembly, make the space very little.The long limit and the minor face ratio of two kinds of " L " shape chips are 3:2, and height over width was more bigger after closed assembly became iron core like this, met the general theory of making iron core, and winding wire is economized most.
Fig. 4 and Fig. 5 illustrate the closed assembly mode and the core structure characteristics of unlike material chip: a slice permalloy sheet and a slice cold-reduced silicon sheet are assembled into as shown in Figure 4 structure, first and third, five layer of chip (odd-level) as iron core, the second, four ... layer (even level) all is that the chip as ground floor is turned over turnback around trunnion axis, carries out the compartment closed assembly of odd-level and even level then; Like this, just formed closed assembly core structure shown in Figure 5.
The core structure that closed assembly like this forms, solved following problem dexterously: (1) 4 right angle adopts the interval closed assembly of two kinds of material chips, one deck is that whole right angle, one deck that the identical material chip is constructed is the right angle of constructing of unlike material chip assembly unit, laminate mutually, thereby make unlike material chip closed assembly become 1 unified high-voltage mutual inductor iron core, under the winding of insulating paper and coil, can " not fall apart ".(2) form 1 elongated all be that the iron core limit power supply of permalloy can be measured winding and the measuring instrument winding uses, can not weakened magnetic property at the place, right angle by " unlike material structure "; Also formed in addition 1 elongated all be that (generally all being two the protection) used for a pair of relaying protection 5P winding in the iron core limit of cold-reduced silicon sheet, can be by " unlike material structure " at the place, right angle yet and thereby the enhancing magnetic property has also just guaranteed the anti-saturation performance that it is very high; (3) the permalloy sheet and the cold-reduced silicon sheet closed assembly that are at interval of other 2 iron core limits forms; the magnetic property of its low-intensity magnetic field is between permalloy iron core limit and cold-reduced silicon sheet iron core limit; can be made into the relaying protection winding of a pair of 3P or 5P; the a pair of winding that can be used for two protections like this; can also improve accuracy of measurement, can make measurement performance transfer wide again to thousand segmentations from rated current percentage section.
Fig. 1 illustrates the utility model structure and winding canoe and compensation method thereof: the iron core that closed assembly becomes has two long slightly limits, purely respectively be formed by stacking by permalloy sheet or cold-reduced silicon sheet, even also be to form along the core section direction of principal axis around the corner, can make its permeability unanimity and maximization like this by permalloy sheet or cold-reduced silicon sheet closed assembly.
Twine on the permalloy sheet iron core limit " electric energy metrical winding " and " monitoring winding ", last 1 circle all lays out from neighbour iron core limit, using these two neighbour iron core limit permeabilities reduces about half, because they are formed by unlike material street closed assembly, the characteristics that are equivalent to the middle punching of identical material iron core threading effect utilize the error compensating method of " iron core+coil " to finish mark number of turn compensation work dexterously.The grade of two windings is respectively " 0.2Ss level ", " 0.2Ss level or 0.5Ss level ", and the electric energy metrical winding has satisfied the requirement of high accuracy (0.2S level) metering under the low-intensity magnetic field operating mode fully; The monitoring winding can be according to user's needs, make 0.2Ss level or 0.5Ss level, this winding can satisfy the measurement input accuracy requirement of telemechanical analog-to-digital conversion measurement module under the low-intensity magnetic field operating mode, operation monitoring microcomputer, AC sampling and measuring device fully, make the new forms of energy user under the low-intensity magnetic field operating mode, also can measure the size of running current exactly, be beneficial to operation monitoring.
Twine the relaying protection winding of a pair of 5P level on the cold-reduced silicon sheet iron core limit, have nothing different, be mainly used in two protections of main transformer or the two protections of bus etc. with 5P level relaying protection winding in the conventional high-tension instrument transformer.
Other two iron core limits all form with permalloy sheet and cold-reduced silicon sheet interval closed assembly; magnetic property under its low-intensity magnetic field operating mode is between the magnetic property on pure permalloy iron core limit and pure cold-reduced silicon sheet iron core limit; can one group of 3P of each coiling or the relaying protection winding of 5P; the a pair of winding that can be used for two protections like this; promptly can improve accuracy of measurement, can make measurement performance transfer wide again to thousand segmentations from rated current percentage section.
At minor face: by permalloy and cold-reduced silicon sheet at interval on the iron core that becomes of closed assembly the effect of coiling relaying protection winding be to make the observing and controlling scope of having expanded relaying protection, by original (1%I
N~ I
N) expand to (0.1%I
N~ I
N).Equally on long limit: the effect of coiling electric energy metrical winding is to make the measuring range of having expanded metering current on the iron core that is become by pure permalloy sheet closed assembly, by original (1%I
N~ I
N) expand to (0.1%I
N~ I
N).And enclose the purpose of (being equivalent to traditional half turn compensation) from minor face coiling one is exactly that accuracy of measurement is brought up to 0.2% by 3% or 5% original (all twining at permalloy).Compare coiling on the cold rolled silicon steel iron core originally, the one, it not measures thousand segmentations of rated current, and the 2nd, accuracy of measurement can only be 5%, also can only arrive 3% by the way accuracy of measurement that twines fine rule more and increase the crude iron core.
On long limit (by pure cold-reduced silicon sheet closed assembly), the right side but or coiling relaying protection winding all on the minor face up and down, having been determined jointly to continue on the right by what of iron core thickness and coil, to protect winding be 3% or 5% to the observing and controlling accuracy (sensitivity) of electric current; Similarly, add coil by the thickness of made from mixed materials on the minor face what determined that jointly relaying protection winding in the last bottom is 3% or 5% to the observing and controlling accuracy of electric current.But need reaffirm: the observing and controlling scope that goes up following upward relaying protection winding is wideer than the right, and energy observing and controlling is to thousand segmentations of rated current.
Claims (1)
1. the extraordinary high pressure measurement current transformer of a 0.2Ss level, it is characterized in that: iron core is formed by " L " shape chip portfolio of two kinds of same sizes, and long limit and minor face ratio that should " L " shape chip be 3:2; Wherein a kind of " L " shape chip is a permalloy material chip, another kind of " L " shape chip is a cold rolled silicon steel material chip, concrete combining structure is: a slice permalloy sheet and a slice cold-reduced silicon sheet are assembled into the basal layer of " " shape as each layer of iron core, odd number basal layer and even number basal layer are carried out the compartment closed assembly, described compartment closed assembly mode is that each odd number basal layer is all identical, each even number basal layer is all identical, and described even number basal layer obtains the odd number basal layer after horizontal central transverse is turned over turnback;
Twine electric energy metrical winding and monitoring winding on the long limit of permalloy sheet iron core, last 1 circle all lays out from neighbour iron core limit;
On the long limit of cold-reduced silicon sheet iron core, twine the relaying protection winding one of 5P level and the relaying protection winding two of 5P level;
Two minor faces at iron core twine the relaying protection winding three of 3P level or 5P level and the relaying protection winding four of 3P level or 5P level respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220681832 CN203085347U (en) | 2012-12-11 | 2012-12-11 | 0.2 Ss-level special-type high-voltage measurement current mutual inductor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220681832 CN203085347U (en) | 2012-12-11 | 2012-12-11 | 0.2 Ss-level special-type high-voltage measurement current mutual inductor |
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| Publication Number | Publication Date |
|---|---|
| CN203085347U true CN203085347U (en) | 2013-07-24 |
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|---|---|---|---|
| CN 201220681832 Expired - Lifetime CN203085347U (en) | 2012-12-11 | 2012-12-11 | 0.2 Ss-level special-type high-voltage measurement current mutual inductor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969138A (en) * | 2012-12-11 | 2013-03-13 | 吉林省电力有限公司电力科学研究院 | 0.2Ss grade special high-voltage metering current transformer |
-
2012
- 2012-12-11 CN CN 201220681832 patent/CN203085347U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969138A (en) * | 2012-12-11 | 2013-03-13 | 吉林省电力有限公司电力科学研究院 | 0.2Ss grade special high-voltage metering current transformer |
| WO2014089977A1 (en) * | 2012-12-11 | 2014-06-19 | 吉林省电力有限公司电力科学研究院 | 0.2ss class special-type high-voltage measuring current transformer |
| CN102969138B (en) * | 2012-12-11 | 2014-10-15 | 吉林省电力有限公司电力科学研究院 | 0.2Ss grade special high-voltage metering current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130724 Effective date of abandoning: 20141015 |
|
| RGAV | Abandon patent right to avoid regrant |