CN209102774U - A kind of multiple shield direct current standard voltage divider - Google Patents
A kind of multiple shield direct current standard voltage divider Download PDFInfo
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- CN209102774U CN209102774U CN201821616715.XU CN201821616715U CN209102774U CN 209102774 U CN209102774 U CN 209102774U CN 201821616715 U CN201821616715 U CN 201821616715U CN 209102774 U CN209102774 U CN 209102774U
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Abstract
The utility model discloses a kind of multiple shield direct current standard voltage dividers, for measuring DC high voltage, including internal layer shielding resistance, measurement resistance and outer shield resistance as made of multiple high-precisions, the series connection of Low Drift Temperature resistance respectively, internal layer shielding resistance, measurement resistance and outer shield resistance are parallel with one another again, and DC high voltage is accurately converted to DC low-voltage according to a certain percentage.Integral structure, inside filling SF6 gas-insulated are used in structure.All potential points (except high-voltage potential and ground potential) of divider are wrapped in epoxy cylinder, and internal filled with SF6 gas, influence amount of the leakage and external electrical field environment caused by effectively reducing because of external environment variation between current potential to measurement layer.
Description
Technical field
The utility model relates to a kind of divider metering field more particularly to a kind of multiple shield direct current standard voltage dividers.
Background technique
The direct-current ultra high voltage transmission of electricity in China has been in rank first at present, and starts large-scale engineer application,
2010, China independently built up Yunnan-Guangdong, Burner zone-Shanghai extra-high voltage ± 800kV direct current demonstration project, cut-off 2017
12 times extra-high voltage direct-current transmission engineerings are built together into the end of the year, the whole nation.With the development of direct-current ultra high voltage, urgent need DC high voltage
Measurement means and magnitude tracing and magnitude transferring method.
At present divider mostly use single-stage resistive layer divide (such as Fig. 1), this structure the above precision of 100kV voltage very
Difficulty accomplishes relatively high level.The insulation mode of conventional voltage divider mostly uses oil immersion insulation, epoxy resins insulation, air insulation,
In extra-high voltage direct-current divider, oil immersion insulation benefits are that good heat dissipation, drawback are that quality weight, seal request are high, easily dirty；
Generally less accurate, the poor radiation using the divider of epoxy resins insulation, and damage can not repair；Air insulation advantage is
Structure is simple, but builtin voltage point spacer insulator is high, is easy to be caused leakage current to increase by external environment influence.
The advantages of extra-high voltage direct-current divider mostly uses multi-section structure at present, this structure is to lift, transport simply.Due to
This structure is multi-section serial composition, and the high-voltage potential of series connection point is exposed, and placing can make intermediate potential point make moist for a long time, causes to let out
Leakage current increases.The electric field on equipment periphery is larger for the current potential influence amount of series connection point, and in complex environment test, error is difficult
Guarantee.
Utility model content
The purpose of this utility model is to provide the standard voltage divider of a kind of high accuracy, high stability, voltage levels,
Standard device is provided for the accurate measurement of DC voltage.
In order to achieve the above object, the utility model proposes technical solutions below:
A kind of multiple shield direct current standard voltage divider is to utilize single layer electric resistance partial pressure, multilayer for measuring DC high voltage
DC high voltage is accurately converted to a kind of DC voltage measurement dress of DC low-voltage by resistance shielding principle according to a certain percentage
It sets.
The divider uses integral structure, including single epoxy cylinder, the column being set in epoxy cylinder, several circular institutes
The insulation column stating column and being uniformly fixedly arranged on the column, each insulation column from close to stud end to far from stud end according to
Secondary spiral winding has internal layer shielding resistance, measurement resistance and outer shield resistance, the internal layer shielding resistance, measurement resistance and outer
Layer shielding resistance is parallel with one another, and the internal layer shielding resistance, measurement resistance and outer shield resistance are by multiple high-precisions, low temperature
Drift resistance is connected in series, the gap filling SF6 gas-insulated medium between the epoxy cylinder and column.
Insulation column is organic glass insulation column.
Measurement resistance mainly accurately converts DC low-voltage for DC high voltage, and internal layer shields resistance and outer shield
Resistance is not involved in DC measurement, and predominantly measurement resistance provides equivalent potential screen.
The utility model compared to the prior art, have it is following the utility model has the advantages that
1, integral structure is used in structure, and all potential points (except high-voltage potential and ground potential) of divider are wrapped
It is rolled in epoxy cylinder, both ensure that the stability of divider internal environment in this way, be also not easily susceptible to external environment influence.
2, on dielectric, using SF6 gas-insulated, insulation performance is superior, make apparatus body quality it is lighter, peace
Entirely, and easy to maintenance, the leakage and external electrical field environment caused by effectively reducing because of external environment variation between current potential are to survey
Measure the influence amount of layer.
3, in precision aspect, this equipment limits of error can be better than 0.05%.
Detailed description of the invention
Fig. 1 is divider schematic diagram in the prior art.
Fig. 2 is the utility model multiple shield direct current standard voltage divider schematic diagram.
Fig. 3 is the utility model multiple shield direct current standard voltage divider schematic diagram of internal structure.
Appended drawing reference:
1- column, 2- insulation column, R1- measurement resistance, R2- internal layer shield resistance, R3- outer shield resistance.
Specific embodiment
The content of the utility model is described in further details with reference to the accompanying drawings and detailed description.
As shown in Fig. 2, be a kind of multiple shield direct current standard voltage divider schematic diagram, including respectively by multiple high-precisions,
Internal layer shielding resistance R2, measurement resistance R1 and outer shield resistance R3 made of the series connection of Low Drift Temperature resistance, internal layer shielding resistance R2,
It is parallel with one another again to measure resistance R1 and outer shield resistance R3, it is low that DC high voltage is accurately converted to direct current according to a certain percentage
Voltage.
Structurally, as shown in figure 3, the divider uses integral structure, including single epoxy cylinder (not shown), set
Column 1, several insulation columns 2 for surrounding the column and being uniformly fixedly arranged on the column being placed in epoxy cylinder, it is described
Insulation column 2 is organic glass insulation column, each insulation column 2 from close to stud end to far from stud end successively spiral winding
There are internal layer shielding resistance R2, the measurement resistance R1 and outer shield resistance R3, the gap filling between epoxy cylinder and column
SF6 gas-insulated medium.Measurement resistance R1 mainly accurately converts DC low-voltage for DC high voltage, and internal layer shields resistance
R2 and outer shield resistance R3 are not involved in DC measurement, and predominantly measurement resistance R1 provides equivalent potential screen.
Above-listed detailed description is illustrating for the utility model possible embodiments, and the embodiment is not to limit
The scope of the patents of the utility model, all equivalence enforcements or change without departing from carried out by the utility model, is intended to be limited solely by this case
In the scope of the patents.
Claims (2)
1. a kind of multiple shield direct current standard voltage divider, it is characterised in that: including single epoxy cylinder, be set in the epoxy cylinder
Column, several around the column and the insulation column that is uniformly fixedly arranged on the column, from close on each insulation column
Stud end is to far from stud end, successively spiral winding has internal layer shielding resistance, measurement resistance and outer shield resistance, the internal layer
It is parallel with one another to shield resistance, measurement resistance and outer shield resistance, the internal layer shielding resistance, measurement resistance and outer shield electricity
Resistance is connected in series by multiple Low Drift Temperature resistance, and the insulation column and the column are placed in as a whole in the epoxy cylinder
SF6 gas-insulated medium is filled in portion, the epoxy cylinder inside.
2. multiple shield direct current standard voltage divider according to claim 1, it is characterised in that: the insulation column is organic
Glass insulation pillar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821616715.XU CN209102774U (en) | 2018-09-30 | 2018-09-30 | A kind of multiple shield direct current standard voltage divider |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821616715.XU CN209102774U (en) | 2018-09-30 | 2018-09-30 | A kind of multiple shield direct current standard voltage divider |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209102774U true CN209102774U (en) | 2019-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821616715.XU Active CN209102774U (en) | 2018-09-30 | 2018-09-30 | A kind of multiple shield direct current standard voltage divider |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113721060A (en) * | 2021-07-19 | 2021-11-30 | 中国电力科学研究院有限公司 | Shielding voltage divider |
-
2018
- 2018-09-30 CN CN201821616715.XU patent/CN209102774U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113721060A (en) * | 2021-07-19 | 2021-11-30 | 中国电力科学研究院有限公司 | Shielding voltage divider |
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