CN206876750U - High tension voltage sampling apparatus - Google Patents
High tension voltage sampling apparatus Download PDFInfo
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- CN206876750U CN206876750U CN201720639158.2U CN201720639158U CN206876750U CN 206876750 U CN206876750 U CN 206876750U CN 201720639158 U CN201720639158 U CN 201720639158U CN 206876750 U CN206876750 U CN 206876750U
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- high pressure
- resistance
- divider resistance
- operating circuit
- sampling apparatus
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Abstract
The utility model discloses a kind of high tension voltage sampling apparatus, embedding cavity including both ends open, it is respectively arranged on 2 operating circuit cavitys at embedding cavity both ends, stretch into embedding cavity and 2 operating circuit cavitys surround insulation fiberglass sleeve in space, high pressure divider resistance in insulation fiberglass sleeve, the high-voltage metallized thin-film capacitor being sheathed on insulation fiberglass sleeve, located at insulation fiberglass sleeve both ends and 2 metallic shield electrodes being connected respectively with high pressure divider resistance both ends, insulating cylinder on the external side face of encapsulation cavity, 2 resistance sampling wires being electrically connected with high pressure divider resistance both ends, 2 capacitance electrode wires being electrically connected with high-voltage metallized thin-film capacitor both ends.The utility model has the characteristics of small volume, high sensitivity, small energy consumption.
Description
Technical field
The utility model is related to power network high pressure sample devices technical field, more particularly, to a kind of small volume, high sensitivity,
The low high tension voltage sampling apparatus of energy consumption.
Background technology
At present, in high-tension line (6.6kV, 10kV, 20kV, 35kV etc.), electronic type voltage transformer, power measurement instrument
The products such as table, high-voltage electric energy meter, its operation principle all include voltage sample and high pressure power-supply circuit, wherein voltage sample mode master
It is divided into two kinds of capacitance partial pressure and electric resistance partial pressure.Capacitance partial pressure major defect is that sampling precision is not high, and temperature drift is larger, electric resistance partial pressure
Sample mode sampling precision is high, but to will also result in sampling precision impacted for stray capacitance；Power-supply circuit typically uses voltage sample
Circuit, high pressure is dropped to the low voltage for being available for power circuit to work by capacitance partial pressure mode and carries out power taking.
As shown in figure 1, voltage sampling circuit is mainly by divider resistance R1, R2, derided capacitors C1, C2, power module and work
Make circuit module composition.It is relatively low signal voltage that divider resistance R1, R2, which are responsible for high voltage partial pressure, to be supplied to operating circuit
Sampled；Low voltage is separated from high tension loop by electric capacity C1, C2 bleeder circuit formed, then by power module is work
Make circuit module and required DC working powers are provided.
A kind of high pressure Sampling device embedding structure chart as shown in Figure 2, in high voltage sampling, undertake most of high pressure
Device mainly has resistance R1 and electric capacity C1, and two components are the larger devices of volume, due to needing by high-voltage isulation performance
Pressure-resistant, partial discharge in test etc. is tested, and two high tension apparatus are needed by vacuum encapsulation in closed space.Wherein, C1 mono-
As be one or more capacitance series.
Because ac high-voltage in electric field caused by two interpolars is uneven, voltage measurement can be made to produce larger error, especially
It is needing the occasion of accurate measurement, such as：On the product such as electronic type voltage transformer, direct-type high-voltage electric energy meter, to solve this
Problem, a kind of existing improvement mode such as figure institute 3 show：Sample resistance is placed in electronic ceramics pipe and embedding, in electronic ceramics pipe
Outer periphery uniform etching goes out multigroup resistance pressure-dividing network and is connected in parallel between the two poles of the earth of ac high-voltage.So as to ensure sampling resistor week
It is uniform to enclose electric field.But the method cost is higher.
Existing electric resistance partial pressure voltage sample mode is primarily present following shortcoming：
Divider resistance and the derided capacitors element independent as two are connected across the interpolar of high-tension line two respectively, shared
Space is big, is unfavorable for the miniaturization of product, meanwhile, manufacture, assembly technology is complicated, increases manufacturing cost.
As shown in Fig. 2 electric resistance partial pressure sampling is influenceed due to non-uniform electric between its high-low pressure on resistance sampling precision
It is larger, it can increase higher cost in outer lateral erosion resistor network in the method for uniform sampling resistance surrounding electric field.
In order to improve the sampling precision of divider resistance, resistance R1 both ends usually require to carry out electric field shielding, due to electric capacity C1
Presence, cause space structure narrow, resistance R1 shielding is higher to technological requirement.
The content of the invention
Goal of the invention of the present utility model is to overcome power network high pressure sample devices volume of the prior art big, sensitive
Spend low, high energy consumption deficiency, there is provided the low high tension voltage sampling apparatus of a kind of small volume, high sensitivity, energy consumption.
To achieve these goals, the utility model uses following technical scheme：
A kind of high tension voltage sampling apparatus, include the embedding cavity of both ends open, be respectively arranged on 2 of embedding cavity both ends
Operating circuit cavity, stretches into embedding cavity and 2 operating circuit cavitys surround insulation fiberglass sleeve in space, located at insulation
High pressure divider resistance in fiberglass sleeve, the high-voltage metallized thin-film capacitor being sheathed on insulation fiberglass sleeve, located at insulation glass
Fiber coating pipe both ends and 2 metallic shield electrodes being connected respectively with high pressure divider resistance both ends, on the external side face of encapsulation cavity
Insulating cylinder, 2 resistance sampling wires being electrically connected with high pressure divider resistance both ends, with high-voltage metallized thin-film capacitor two
2 capacitance electrode wires being electrically connected are held, 2 metallic shield electrodes are tightly connected with 2 operating circuit cavitys respectively, are filled
The cavity by vacuumizing is provided between envelope cavity and high-voltage metallized thin-film capacitor.
High-voltage metallized thin-film capacitor is wound on insulation cavity pipe, then high pressure sampling resistor is placed by the utility model
In the cavity in electric capacity axle center, make the sampling of high-tension resistive partial pressure and capacitance partial pressure current-taking function together as one, solve well
The shortcomings that in the sampling of conventional high-tension electric resistance partial pressure, has following points advantage：
1st, high pressure sampling element embedding volume significantly reduces；
2nd, high-voltage metallized thin-film capacitor monomer as shown in figure 4, metallized film be by a plurality of film for being coated with metal around
System forms, can with the equivalent series connection as multiple electric capacity, multiple metallized film capacitors are monomer series-connected connect can be equivalent to it is more
The series connection of individual electric capacity, whole electric resistance partial pressure voltage sampling element can be equivalent to shown in Fig. 5 by multiple capacitive divider network bags
Be trapped among around resistance sampling, form with resistance pressure-dividing network identical uniform electric field effect, simultaneously because electric capacity is not active
Loss, reduces sampling energy consumption.
Preferably, the insulating cylinder is provided with the SOI full skirt that several are arranged in order along insulating cylinder bearing of trend,
The width of the cross section of SOI full skirt diminishes successively from the bottom to top.
Preferably, high pressure divider resistance is integral type high pressure sampling resistor or several high pressure sampling resistor connection in series-parallel groups
Into.
Preferably, the end of 2 metallic shield electrodes towards high pressure divider resistances is all provided with fluted, high pressure divider resistance
Both ends are stretched into 2 grooves, and 2 bottom portion of groove are respectively provided with the through hole through 2 resistance sampling wires.
Preferably, high-voltage metallized thin-film capacitor is in series by several monomer electric capacity, each monomer electric capacity by
The film winding for being coated with some metal films forms.
Preferably, 2 operating circuit cavitys are rounded, it is recessed in the middle part of 2 operating circuit cavitys to inner side.
Therefore, the utility model has the advantages that：The physical dimension of high pressure sampling, high-pressure metal is greatly reduced
Change thin-film capacitor to be wound on outside sampling resistor, play a part of shielding sampling resistor electric field, electric capacity uniform gradient, which declines, to be also functioned to
The effect of uniform sampling resistance surrounding electric field, improves detection sensitivity；Reduce cost and energy consumption.
Brief description of the drawings
Fig. 1 is a kind of electric resistance partial pressure voltage sample theory diagram of prior art；
Fig. 2 is a kind of high pressure Sampling device embedding structure chart of prior art；
Fig. 3 is that a kind of resistance pressure-dividing network of prior art realizes the schematic diagram of uniform electric field；
Fig. 4 is a kind of molding structure schematic diagram of monomer electric capacity of the present utility model；
Fig. 5 is a kind of electric resistance partial pressure sampling isoboles of the present utility model；
Fig. 6 is a kind of sectional view of the present utility model.
In figure：High pressure divider resistance 1, insulation fiberglass sleeve 2, high-voltage metallized thin-film capacitor 3, metallic shield electrode 4, filling
Seal cavity 5, operating circuit cavity 6, film 7, SOI full skirt 8, insulating cylinder 9, resistance sampling wire 10, capacitance electrode wire
11st, metal film 12, equivalent capacity distributed network 13, electronic ceramics pipe 14.
Embodiment
The utility model is further described with reference to the accompanying drawings and detailed description.
As shown in Fig. 6 a kind of high tension voltage sampling apparatus, include the embedding cavity 5 of both ends open, be respectively arranged on filling
2 operating circuit cavitys 6 at cavity both ends are sealed, embedding cavity is stretched into and 2 operating circuit cavitys surrounds insulation in space
Fiberglass sleeve 2, the high pressure divider resistance 1 in insulation fiberglass sleeve, the high-voltage metallized being sheathed on insulation fiberglass sleeve
Thin-film capacitor 3, located at insulation fiberglass sleeve both ends and 2 metallic shield electrodes 4 being connected respectively with high pressure divider resistance both ends,
Insulating cylinder 9 on the external side face of encapsulation cavity, 2 resistance sampling wires being electrically connected with high pressure divider resistance both ends
10,2 capacitance electrode wires being electrically connected with high-voltage metallized thin-film capacitor both ends, 11,2 metallic shield electrode difference
It is tightly connected with 2 operating circuit cavitys, the sky by vacuumizing is provided between embedding cavity and high-voltage metallized thin-film capacitor
Chamber.
Insulating cylinder is provided with 7 SOI full skirts 8 being arranged in order along insulating cylinder bearing of trend, SOI full skirt it is transversal
The width in face diminishes successively from the bottom to top.The purpose for setting each SOI full skirt is to climb electric spacing to increase.
High pressure divider resistance is that integral type high pressure sampling resistor or multiple high pressure sampling resistor connection in series-parallel form.
The end of 2 metallic shield electrodes towards high pressure divider resistances is all provided with fluted, and high pressure divider resistance both ends stretch into 2
In individual groove, 2 bottom portion of groove are respectively provided with the through hole through 2 resistance sampling wires.
High-voltage metallized thin-film capacitor is in series by 4 monomer electric capacity, and each monomer electric capacity is by plating as shown in Figure 4
The coiling of film 7 for having 6 metal films 12 forms.2 operating circuit cavitys are rounded, in the middle part of 2 operating circuit cavitys to
Inner side is recessed.
High-voltage metallized thin-film capacitor monomer is as shown in figure 4, metallized film is by a plurality of film winding for being coated with metal
Form, can with the equivalent series connection as multiple electric capacity, multiple metallized film capacitors are monomer series-connected connect can be equivalent to it is multiple
The series connection of electric capacity, whole electric resistance partial pressure voltage sampling element can be equivalent to the equivalent capacity distributed network 13 shown in Fig. 5, by more
Individual capacitive divider network is enclosed in around resistance sampling, form with resistance pressure-dividing network identical uniform electric field effect, simultaneously
Because electric capacity does not have active loss, sampling energy consumption is reduced.Fig. 3 includes electronic ceramics pipe 14.
Application method of the present utility model is as follows：
2 capacitance electrode wires at high tension voltage sampling apparatus both ends and 2 capacitance electrode wires are all connected with work electricity
Road, operating circuit are connected with high-voltage line to be measured, so as to carry out high tension voltage sampling.
Or 1 capacitance electrode wire of high tension voltage sampling apparatus one end and 1 capacitance electrode wire are connected into work
Circuit, 1 capacitance electrode wire of the high tension voltage sampling apparatus other end and 1 capacitance electrode wire are connected into high-voltage line, from
And carry out high tension voltage sampling.
It should be understood that the present embodiment is merely to illustrate the utility model rather than limitation the scope of the utility model.In addition
It should be understood that after the content of the utility model instruction has been read, those skilled in the art can make various to the utility model
Change or modification, these equivalent form of values equally fall within the application appended claims limited range.
Claims (6)
1. a kind of high tension voltage sampling apparatus, it is characterized in that, include the embedding cavity (5) of both ends open, be respectively arranged on encapsulation cavity
2 operating circuit cavitys (6) at body both ends, stretch into embedding cavity and 2 operating circuit cavitys surround insulation glass in space
Fiber coating pipe (2), the high pressure divider resistance (1) in insulation fiberglass sleeve, the high-pressure metal being sheathed on insulation fiberglass sleeve
Change thin-film capacitor (3), located at insulation fiberglass sleeve both ends and 2 metallic shield electricity being connected respectively with high pressure divider resistance both ends
Pole (4), the insulating cylinder (9) on the external side face of encapsulation cavity, 2 resistance being electrically connected with high pressure divider resistance both ends are adopted
Sample wire (10), 2 capacitance electrode wires (11) being electrically connected with high-voltage metallized thin-film capacitor both ends, 2 metal screens
Cover electrode to be tightly connected with 2 operating circuit cavitys respectively, be provided with and pass through between embedding cavity and high-voltage metallized thin-film capacitor
The cavity vacuumized.
2. high tension voltage sampling apparatus according to claim 1, it is characterized in that, the insulating cylinder is provided with several along exhausted
The SOI full skirt (8) that edge cylinder bearing of trend is arranged in order, the width of the cross section of SOI full skirt diminish successively from the bottom to top.
3. high tension voltage sampling apparatus according to claim 1, it is characterized in that, high pressure divider resistance is that integral type high pressure is adopted
Sample resistance or several high pressure sampling resistor connection in series-parallel composition.
4. high tension voltage sampling apparatus according to claim 1, it is characterized in that, 2 metallic shield electrodes divide towards high pressure
The end of piezoresistance is all provided with fluted, and high pressure divider resistance both ends are stretched into 2 grooves, and 2 bottom portion of groove are respectively provided with
Through the through hole of 2 resistance sampling wires.
5. high tension voltage sampling apparatus according to claim 1, it is characterized in that, high-voltage metallized thin-film capacitor is by several
Monomer electric capacity is in series, and each monomer electric capacity forms by film (7) coiling for being coated with some metal films (12).
6. according to the high tension voltage sampling apparatus described in claim 1 or 2 or 3 or 4 or 5, it is characterized in that, 2 operating circuit chambers
Body is rounded, is recessed in the middle part of 2 operating circuit cavitys to inner side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720639158.2U CN206876750U (en) | 2017-06-02 | 2017-06-02 | High tension voltage sampling apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720639158.2U CN206876750U (en) | 2017-06-02 | 2017-06-02 | High tension voltage sampling apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206876750U true CN206876750U (en) | 2018-01-12 |
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ID=61338194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720639158.2U Active CN206876750U (en) | 2017-06-02 | 2017-06-02 | High tension voltage sampling apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114705955A (en) * | 2022-03-02 | 2022-07-05 | 中国电子科技集团公司第二十九研究所 | Device and method for testing insulation and voltage resistance of polytetrafluoroethylene high-voltage wire |
-
2017
- 2017-06-02 CN CN201720639158.2U patent/CN206876750U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114705955A (en) * | 2022-03-02 | 2022-07-05 | 中国电子科技集团公司第二十九研究所 | Device and method for testing insulation and voltage resistance of polytetrafluoroethylene high-voltage wire |
| CN114705955B (en) * | 2022-03-02 | 2023-04-25 | 中国电子科技集团公司第二十九研究所 | Insulation and voltage resistance testing device and method for polytetrafluoroethylene high-voltage wire |
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