CN204331013U - A kind of 10kV ~ 35kV high voltage electric energy magnitude tracing standard set-up - Google Patents
A kind of 10kV ~ 35kV high voltage electric energy magnitude tracing standard set-up Download PDFInfo
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- CN204331013U CN204331013U CN201420765815.4U CN201420765815U CN204331013U CN 204331013 U CN204331013 U CN 204331013U CN 201420765815 U CN201420765815 U CN 201420765815U CN 204331013 U CN204331013 U CN 204331013U
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- 238000012546 transfer Methods 0.000 claims abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 33
- 238000004804 winding Methods 0.000 claims description 22
- 230000005684 electric field Effects 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 13
- 238000011156 evaluation Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000013178 mathematical model Methods 0.000 description 3
- 229920002799 BoPET Polymers 0.000 description 2
- 239000005041 Mylar™ Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The utility model relates to a kind of 10kV ~ 35kV high voltage electric energy magnitude tracing standard set-up, comprise three high pressure combined standard mutual inductor (2A, 2B, 2C) He one low-voltage standards electric energy meter (3), described three high pressure combined standard mutual inductor (2A, 2B, 2C) receive three-phase high voltage by primary connection terminal (9) respectively, the low-voltage that big current is converted, small area analysis signal, and respectively by secondary wiring terminals (10) through cable (4A, 4B, 4C) transfer to three-phase voltage and the current input terminal of low-voltage standards electric energy meter (3), described three high pressure combined standard mutual inductor (2A, 2B, the input impedance of rated sencondaryload 2C) and described low-voltage standards electric energy meter (3) such as to match each other at the feature.The utility model carries out voltage, electric current conversion with electromagnetic potential transformer summation current transformer, and carry out electric energy metrical with low-voltage standards electric energy meter, rational in infrastructure, magnitude tracing is simple and practical, and accuracy is high, stable performance.
Description
Technical field
The utility model relates to electric energy measurement technology, is specifically related to a kind of 10kV ~ 35kV high voltage electric energy magnitude tracing standard set-up.
Background technology
Electric energy meter is usually operated at below voltage 600V, under environment within electric current 100A, when voltage or electric current exceed above scope, just need to use voltage transformer (VT) (PT) summation current transformer (CT) that high voltage and big current are converted to by certain accuracy the scope that electric energy meter can measure.Forming one thus with low-voltage Watt-hour meter is core, the high-voltage electric energy measurement that CT and PT is supporting for it and observation and control technology system, for the high-voltage electric-energy meter that this mutual inductor and electric energy meter combine, the accuracy of its error in dipping and electric current, voltage transformer (VT), the mode of connection (PT secondary voltage drop) and the accuracy of electric energy meter are relevant.For controlling electric energy metering error, there are concrete standard and measurement mechanism and method of calibration thereof in China to each link, but can only be weigh with the composition error index of theory calculate to the global error of this electric power meter, suppose current transformer, voltage transformer (VT) and electric energy meter are 0.2 grade, and the composition error of above device is estimated as ± and 0.7%.
In recent years, electromagnetic transformer or non-traditional mutual inductor are formed the instrument of integration by some manufacturers together with electronic watt-hour watch circuit, are called direct access high-voltage electric energy meter.This high-voltage electric energy meter is directly installed to high-voltage fence, integrally can carry out measurement verification, and have the advantages such as failure rate is low, safe and reliable, energy-conserving and environment-protective, the application in the power distribution network of China below 35kV is more and more extensive.High-voltage electric energy meter, as electric power meter, belongs to trade settlement measurement instrument, and its error in dipping need carry out compulsory verification in accordance with the law.Research is carried out to the overall calibration technology of high-voltage electric energy meter significant.
Utility model content
The purpose of this utility model is to provide a kind of 10kV ~ 35kV high voltage electric energy magnitude tracing standard set-up, and solve the global error that existing measurement mechanism cannot ensure electric energy meter, accuracy of measurement is low, and the problem of account form complexity.
For solving above-mentioned technical matters, the utility model by the following technical solutions:
A kind of 10kV ~ 35kV high voltage electric energy magnitude tracing standard set-up, comprise three high pressure combined standard mutual inductors and a low-voltage standards electric energy meter, described three high pressure combined standard mutual inductors are respectively by low-voltage, small area analysis signal that primary connection terminal reception three-phase high voltage, big current are converted, and respectively by secondary wiring terminals through cable transmission to the three-phase voltage of low-voltage standards electric energy meter and current input terminal, the rated sencondaryload of described three high pressure combined standard mutual inductors and the input impedance of described low-voltage standards electric energy meter match each other; Described three high pressure combined standard mutual inductors are all be made up of the voltage transformer (VT) summation current transformer be arranged in pressure vessel casing, the SF6 insulating gas of 0.35MPa ~ 0.4MPa is filled with in described pressure vessel casing, described current transformer is fixed on casing top, and be provided with the metal screen layer of armoured magnetic field outside the iron core on current transformer and winding, described voltage transformer (VT) is fixed on lower box, is provided with the radome of uniform electric field outside a winding of voltage transformer (VT).
Further technical scheme is, the rated voltage of described voltage transformer (VT) is
the iron core of voltage transformer (VT) is that silicon-steel sheet coiled makes R shape iron core, activity coefficient and lamination coefficient control more than 0.99, core dimensions is R-135/60-90mm, magnetic under rated voltage is close is 1T, iron core is the enameled wire of Φ 1.2mm around 189 circles as low pressure winding, then use the enameled wire of Φ 0.21mm around 18900 circles as high pressure winding.
Further technical scheme is, described voltage transformer (VT) is annular magnet electromotive force collocation structure along separate routes, described iron core is by 1J85 glass not alloy main iron core and the cold-reduced silicon sheet magnetic shunt path iron core being of a size of R-100/120-10mm being of a size of R-90/70-10mm, the enameled wire of wire diameter Φ 1mm is first independent around 60 circles on main iron core, is then combined around 940 circles main iron core and magnetic shunt path iron core as Secondary Winding.
Further technical scheme is, its method of testing is, described three high pressure combined standard mutual inductors are traced to the source to power-frequency voltage ratio standard and power current ratio standard, and described low-voltage standards electric energy meter is traced to the source to power frequency electric energy standard, with electric energy comprehensive error computation formula γ=γ
b+ γ
h+ γ
dfor the overall evaluation of uncertainty in measurement of mathematical model evaluation high voltage electric energy magnitude tracing standard set-up, thus determine the entirety measurement level of high voltage electric energy magnitude tracing standard set-up.
Compared with prior art, the beneficial effects of the utility model are: the high voltage electric energy magnitude tracing standard set-up that the utility model provides, voltage, electric current conversion is carried out with electromagnetic potential transformer summation current transformer, electric energy metrical is carried out with low-voltage standards electric energy meter, rational in infrastructure, magnitude tracing is simple and practical, and accuracy is high, stable performance.
Accompanying drawing explanation
Fig. 1 is the utility model one-piece construction block diagram.
Fig. 2 is the structural representation of the utility model mesohigh combined type standard mutual inductor.
Description of symbols in Fig. 1: 1-high voltage electric energy magnitude tracing standard set-up; 2A, 2B, 2C-high pressure combined standard mutual inductor; 3-low-voltage standards electric energy meter; 4A, 4B, 4C-cable.
Description of symbols in Fig. 2: 5-voltage transformer (VT); 6-current transformer; 7-casing; 8-metal screen layer; 9-primary connection terminal; 10-secondary wiring terminals.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 1 shows an embodiment of a kind of 10kV ~ 35kV of the utility model high voltage electric energy magnitude tracing standard set-up: a kind of 10kV ~ 35kV high voltage electric energy magnitude tracing standard set-up, comprise three high pressure combined standard mutual inductor 2A, 2B, a 2C and low-voltage standards electric energy meter 3, described three high pressure combined standard mutual inductor 2A, 2B, 2C receives three-phase high voltage by primary connection terminal 9 respectively, the low-voltage that big current is converted, small area analysis signal, and respectively by secondary wiring terminals 10 through cable 4A, 4B, 4C transfers to three-phase voltage and the current input terminal UA of low-voltage standards electric energy meter 3, IA, UB, IB, UC, IC, described three high pressure combined standard mutual inductor 2A, 2B, the rated sencondaryload of 2C and the input impedance of described low-voltage standards electric energy meter 3 match each other, described three high pressure combined standard mutual inductor 2A, 2B, 2C are made up of voltage transformer (VT) 5 summation current transformer 6 be arranged in pressure vessel casing 7, the SF6 insulating gas of 0.35MPa ~ 0.4MPa is filled with in described pressure vessel casing 7, described current transformer 6 is fixed on casing 7 top, and be provided with the metal screen layer 8 of armoured magnetic field outside the iron core on current transformer 6 and winding, described voltage transformer (VT) 5 is fixed on casing 7 bottom, is provided with the radome of uniform electric field outside a winding of voltage transformer (VT) 5.
In figure, mark is specially: the pressure combined standard mutual inductor of height of 2A, 2B, 2C-be respectively A, B, C three-phase; 3-low-voltage standards electric energy meter; 4A, 4B, 4C-be respectively cable between A, B, C three-phase mutual inductor and electric energy meter.
According to a preferred embodiment of a kind of 10kV ~ 35kV high voltage electric energy of the utility model magnitude tracing standard set-up, the rated voltage of described voltage transformer (VT) 5 is
the iron core of voltage transformer (VT) 5 is that silicon-steel sheet coiled makes R shape iron core, activity coefficient and lamination coefficient control more than 0.99, core dimensions is R-135/60-90mm, magnetic under rated voltage is close is 1T, iron core is the enameled wire of Φ 1.2mm around 189 circles as low pressure winding, then use the enameled wire of Φ 0.21mm around 18900 circles as high pressure winding, low pressure winding, in 54 circle place taps, is formed
with
two amount limits.High pressure winding adopts classification pagoda type structure, insulate between winding layers with mylar.Electrostatic screening layer is spread to reduce the impact of stray capacitive currents between high-low pressure winding.
According to a preferred embodiment of a kind of 10kV ~ 35kV high voltage electric energy of the utility model magnitude tracing standard set-up, described voltage transformer (VT) 5 is annular magnet electromotive force collocation structure along separate routes, described iron core is by 1J85 glass not alloy main iron core and the cold-reduced silicon sheet magnetic shunt path iron core being of a size of R-100/120-10mm being of a size of R-90/70-10mm, the enameled wire of wire diameter Φ 1mm is first independent around 60 circles on main iron core, then main iron core and magnetic shunt path iron core are combined around 940 circles as Secondary Winding, insulation course after Secondary Winding external application mylar bag insulation 9mm, then around a winding, make one, the turn ratio of Secondary Winding is formed
with
etc. multiple amount limit.
According to a preferred embodiment of a kind of 10kV ~ 35kV high voltage electric energy of the utility model magnitude tracing standard set-up, described three high pressure combined standard mutual inductor 2A, 2B, 2C trace to the source to power-frequency voltage ratio standard and power current ratio standard, described low-voltage standards electric energy meter 3 is traced to the source to power frequency electric energy standard, with electric energy comprehensive error computation formula γ=γ
b+ γ
h+ γ
dfor the overall evaluation of uncertainty in measurement of mathematical model evaluation high voltage electric energy magnitude tracing standard set-up 1, thus determine the entirety measurement level of high voltage electric energy magnitude tracing standard set-up 1.
As preferably, described low-voltage standards table 3 can select RD33 type 0.01 grade standard electric energy meter.
The voltage transformer (VT) of high voltage electric energy magnitude tracing standard set-up is traced to the source to power-frequency voltage ratio standard, and accuracy is better than 0.01 grade; Current transformer is traced to the source to power current ratio standard, and accuracy is better than 0.01 grade; The accuracy of RD33 type standard electric energy meter is 0.01 grade.Appropriate electric field shielding and magnetic field shielding measure is have employed in the design of combined instrument transformer, the magnetic field of current－carrying conductor is on the impact of voltage transformer error, and the capacitance current that applying high voltage is formed is all less on the impact of current transformer error, negligible when carrying out device uncertainty evaluation.The secondary voltage drop that connecting line between voltage transformer (VT) and electric energy meter causes is very little.Therefore with electric energy comprehensive error computation formula γ=γ
b+ γ
h+ γ
dfor the overall uncertainty of measurement of mathematical model evaluation high voltage electric energy magnitude tracing standard set-up, its uncertainty source mainly comprises measuring repeatability, standard low pressure electric energy meter, voltage transformer (VT), current transformer, align mode and duty is inconsistent and relative error data recondition.Each partial uncertainty is calculated, then uses uncertainty propagation formula
ask Composite Seismogram, then get fiducial probability and be about 95%, k=2, the overall uncertainty of measurement can trying to achieve high voltage electric energy magnitude tracing standard set-up is less than 1 × 10
-4.
Although be described the utility model with reference to multiple explanatory embodiment of the present utility model here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.More particularly, in the scope of, accompanying drawing open in the application and claim, multiple modification and improvement can be carried out to the building block of subject combination layout and/or layout.Except the distortion carried out building block and/or layout and improving, to those skilled in the art, other purposes also will be obvious.
Claims (3)
1. 10kV ~ 35kV high voltage electric energy magnitude tracing standard set-up, it is characterized in that: comprise three high pressure combined standard mutual inductor (2A, 2B, 2C) He one low-voltage standards electric energy meter (3), described three high pressure combined standard mutual inductor (2A, 2B, 2C) receive three-phase high voltage by primary connection terminal (9) respectively, the low-voltage that big current is converted, small area analysis signal, and respectively by secondary wiring terminals (10) through cable (4A, 4B, 4C) transfer to three-phase voltage and the current input terminal of low-voltage standards electric energy meter (3), described three high pressure combined standard mutual inductor (2A, 2B, the input impedance of rated sencondaryload 2C) and described low-voltage standards electric energy meter (3) matches each other,
Described three high pressure combined standard mutual inductor (2A, 2B, 2C) be all made up of voltage transformer (VT) (5) summation current transformer (6) be arranged in pressure vessel casing (7), the SF6 insulating gas of 0.35MPa ~ 0.4MPa is filled with in described pressure vessel casing (7), described current transformer (6) is fixed on casing (7) top, and be provided with the metal screen layer (8) of armoured magnetic field outside the iron core on current transformer (6) and winding, described voltage transformer (VT) (5) is fixed on casing (7) bottom, the radome of uniform electric field is installed outside a winding of voltage transformer (VT) (5).
2. a kind of 10kV ~ 35kV high voltage electric energy magnitude tracing standard set-up according to claim 1, is characterized in that: the rated voltage of described voltage transformer (VT) (5) is
the iron core of voltage transformer (VT) (5) is that silicon-steel sheet coiled makes R shape iron core, activity coefficient and lamination coefficient control more than 0.99, core dimensions is R-135/60-90mm, magnetic under rated voltage is close is 1T, iron core is the enameled wire of Φ 1.2mm around 189 circles as low pressure winding, then use the enameled wire of Φ 0.21mm around 18900 circles as high pressure winding.
3. a kind of 10kV ~ 35kV high voltage electric energy magnitude tracing standard set-up according to claim 2, it is characterized in that: described voltage transformer (VT) (5) is annular magnet electromotive force collocation structure along separate routes, described iron core is by 1J85 glass not alloy main iron core and the cold-reduced silicon sheet magnetic shunt path iron core being of a size of R-100/120-10mm being of a size of R-90/70-10mm, the enameled wire of wire diameter Φ 1mm is first independent around 60 circles on main iron core, is then combined around 940 circles main iron core and magnetic shunt path iron core as Secondary Winding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420765815.4U CN204331013U (en) | 2014-12-08 | 2014-12-08 | A kind of 10kV ~ 35kV high voltage electric energy magnitude tracing standard set-up |
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| CN201420765815.4U CN204331013U (en) | 2014-12-08 | 2014-12-08 | A kind of 10kV ~ 35kV high voltage electric energy magnitude tracing standard set-up |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502882A (en) * | 2014-12-08 | 2015-04-08 | 国网四川省电力公司电力科学研究院 | Standard device for tracing 10kV-35kV high voltage electric energy value |
| CN107192974A (en) * | 2017-07-19 | 2017-09-22 | 云南电网有限责任公司电力科学研究院 | Integration voltage current standard transformer |
| CN109613465A (en) * | 2018-12-27 | 2019-04-12 | 中国电力科学研究院有限公司 | A kind of metrological supervision method of low-voltage current mutual inductor automatic calibration assembly line |
-
2014
- 2014-12-08 CN CN201420765815.4U patent/CN204331013U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502882A (en) * | 2014-12-08 | 2015-04-08 | 国网四川省电力公司电力科学研究院 | Standard device for tracing 10kV-35kV high voltage electric energy value |
| CN107192974A (en) * | 2017-07-19 | 2017-09-22 | 云南电网有限责任公司电力科学研究院 | Integration voltage current standard transformer |
| CN107192974B (en) * | 2017-07-19 | 2023-06-09 | 云南电网有限责任公司电力科学研究院 | Integrated voltage and current standard transformer |
| CN109613465A (en) * | 2018-12-27 | 2019-04-12 | 中国电力科学研究院有限公司 | A kind of metrological supervision method of low-voltage current mutual inductor automatic calibration assembly line |
| CN109613465B (en) * | 2018-12-27 | 2022-02-01 | 中国电力科学研究院有限公司 | Metering supervision method for automatic verification assembly line of low-voltage current transformer |
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