CN206161718U - Double zero sequence voltage measuring device of outdoor type power supply - Google Patents
Double zero sequence voltage measuring device of outdoor type power supply Download PDFInfo
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- CN206161718U CN206161718U CN201621135822.1U CN201621135822U CN206161718U CN 206161718 U CN206161718 U CN 206161718U CN 201621135822 U CN201621135822 U CN 201621135822U CN 206161718 U CN206161718 U CN 206161718U
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Abstract
The utility model discloses a double zero sequence voltage measuring device of outdoor type power supply, including a solid back cover seat, gu interior pouring of back cover seat has the voltage measurement subassembly, the voltage measurement subassembly includes a capacitanc voltage sensor, capacitanc voltage sensor's wiring end is connected with fusion tube A, fusion tube B and fusion tube C respectively, fusion tube A, fusion tube B and fusion tube C's input is connected with high -pressure terminal A, high -pressure terminal B and high -pressure terminal C respectively, there are high -pressure terminal A, high -pressure terminal B and high -pressure terminal C to set up gu the upper end of back cover seat, be connected with a single -phase PT between fusion tube A's input and fusion tube B's the input, integrated have zero sequence voltage measurement function and a power supply function, carries out zero sequence voltage's measurement through fusion tube and electric capacity, and the impedance is high, is difficult to emergence short -circuit fault and resonant overvoltage, influences for a short time to electric power system, it is convenient to connect, makes up little, the light in weight of volume of formula, convenient outdoor installation and maintenance, and economic practicality is better.
Description
Technical field
The utility model is related to 10kV transmission and distribution network equipment, more particularly to a kind of outdoor type is powered and residual voltage measurement
Device.
Background technology
Singlephase earth fault is the most commonly seen fault type of 10kV transmission and distribution networks, and system zero sequence is caused after single-phase earthing
Voltage is raised, once repeatedly occurred in operation due to circuit single-phase earthing cause adjacent transformers neutral point gap breakdown cause after
Electric protection loses selective case.Possesses the predominantly Integral three-phase electromagnetic type of power supply and residual voltage measurement function at present
Voltage transformer.
The impedance very little of electromagnetic potential transformer, once secondary is short-circuited, electric current is burnt coil by sharp increase.
For this purpose, the former limit of zero sequential potential transformer is connected to fuse, secondary secondary voltage circuit has a mutual reinforcement between reliable ground, Yi Mianyuan,
During secondary insulation damage, there is high potential over the ground and causes the person and equipment breakdown in secondary.
There are problems that saturation resonance overvoltage unshakable in one's determination.Due to China's 10kV power distribution networks be mainly isolated neutral (or
Jing grounding through arc) system, except one three-phase five-limb electromagnetic potential transformer (former limit of installation on substation bus bar
Winding neutral ground), typically not in a large amount of electromagnetic potential transformers for installing neutral ground on distribution line, with
Avoid causing circuit resonance overvoltage accident because of multiple neutral grounds.
In practical application, the supporting ca bin of line switching (FTU), switching station's terminal unit (DTU), failure
The failure detectors such as current indicator (FCI) can only judge ground connection event by the size of current of zero sequence current mutual inductor
Barrier, is not measured residual voltage, can not calculate the direction of zero-sequence current, easy false alarm or fails to report police, and accuracy is not high.
Utility model content
In order to overcome the above-mentioned deficiencies of the prior art, the utility model presses close to metope OR gate there is provided one kind without using person
Face just can be directly perceived, and the outdoor type of the situation in desired location visible in detail or space is powered and residual voltage measurement apparatus.
To achieve these goals, the technical solution adopted in the utility model is：
A kind of outdoor type is powered and residual voltage measurement apparatus, including a sealing base, is cast with the sealing base
Voltage measurement component, the voltage measurement component includes a capacitive battery pressure sensor, and the capacitive battery pressure sensor connects
Line end is connected to fusion tube A, fusion tube B and fusion tube C, and the input of the fusion tube A, fusion tube B and fusion tube C is connected to high pressure
Terminal A, HV Terminal B and HV Terminal C, it is described to have HV Terminal A, HV Terminal B and HV Terminal C to be arranged on the sealing
The upper end of base, is connected with a single-phase PT, on the sealing base between the input of the fusion tube A and the input of fusion tube B
The first ground terminal is provided with, the output end of the capacitive battery pressure sensor is connected with first ground terminal.
Used as the further improvement of such scheme, the capacitive battery pressure sensor includes high-voltage capacitance A, high-voltage capacitance B
With high-voltage capacitance C, the input of high-voltage capacitance A, high-voltage capacitance B and high-voltage capacitance C respectively with the fusion tube A, fusion tube B and
The output end connection of fusion tube C, the output end of high-voltage capacitance A, high-voltage capacitance B and high-voltage capacitance C is connected in parallel to a low-voltage capacitance
Input, the output end of the low-voltage capacitance is connected with first ground terminal.
Used as the further improvement of such scheme, the lower surface of the sealing base is provided with the first low-voltage terminal, and second
Low-voltage terminal, the 3rd low-voltage terminal and the 4th low-voltage terminal.
As the further improvement of such scheme, the single-phase PT be provided with high-tension coil tap A, high-tension coil tap B,
Low-voltage coil tap A and low-voltage coil tap B, the high-tension coil tap A and high-tension coil tap B are respectively connecting to described molten
The input of pipe A and fusion tube B, the low-voltage coil tap A and low-voltage coil tap B respectively with the 3rd low-voltage terminal and
Four low-voltage terminals connect.
Used as the further improvement of such scheme, the lower surface of the sealing base is provided with mounting seat.
The beneficial effects of the utility model：
A kind of outdoor type of the utility model is powered and residual voltage measurement apparatus, is integrated with residual voltage measurement function and confession
Electricity Functional, by fusion tube and electric capacity the measurement of residual voltage is carried out, and impedance is high, it is not easy to which the failure that is short-circuited and resonance are excessively electric
Pressure is little to effect on power system；Easy to connect, knockdown structural volume is little, lightweight, facilitates outdoor installation with maintenance, Jing
Ji practicality is more preferable.
Description of the drawings
Technical scheme in order to be illustrated more clearly that the utility model embodiment, below will be to needed for embodiment description
The accompanying drawing to be used is briefly described.Obviously, described accompanying drawing is a part of embodiment of the present utility model, rather than entirely
Portion's embodiment, those skilled in the art on the premise of not paying creative work, can be with according to these accompanying drawings acquisitions
Other designs and accompanying drawing：
Fig. 1 is the utility model preferred embodiment electrical schematic diagram；
Fig. 2 is the utility model preferred embodiment front view；
Fig. 3 is the utility model preferred embodiment upward view；
Fig. 4 is the utility model preferred embodiment top view.
Specific embodiment
The technique effect of design of the present utility model, concrete structure and generation is carried out below with reference to embodiment and accompanying drawing
Clearly and completely describe, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment
It is a part of embodiment of the present utility model, rather than whole embodiments, based on embodiment of the present utility model, the skill of this area
The other embodiment that art personnel are obtained on the premise of not paying creative work, belongs to the model of the utility model protection
Enclose.
Referring to figs. 1 to Fig. 4, a kind of outdoor type is powered and residual voltage measurement apparatus, including a sealing base 6, described solid
Voltage measurement component is cast with back cover seat 6, the lower surface of the sealing base 6 is provided with mounting seat 7, and the mounting seat 7 is used
To be fixed on outdoor grid.The voltage measurement component includes a capacitive battery pressure sensor 1, the capacitor voltage sensing
The terminals of device 1 are connected to fusion tube A2, fusion tube B3 and fusion tube C4, the input of the fusion tube A2, fusion tube B3 and fusion tube C4
HV Terminal A61, HV Terminal B62 and HV Terminal C63 are connected to, it is described to have HV Terminal A61, HV Terminal B62
With the upper end that HV Terminal C63 is arranged on the sealing base 6, between the input of the fusion tube A2 and the input of fusion tube B3
A single-phase PT5 is connected with, the first ground terminal 66, the output of the capacitive battery pressure sensor are provided with the sealing base
End is connected with first ground terminal 66.
The capacitive battery pressure sensor includes high-voltage capacitance A11, high-voltage capacitance B12 and high-voltage capacitance C13, the high pressure
The input of electric capacity A11, high-voltage capacitance B12 and high-voltage capacitance C13 respectively with the output of the fusion tube A2, fusion tube B3 and fusion tube C4
End connection, the output end of high-voltage capacitance A11, high-voltage capacitance B12 and high-voltage capacitance C13 is connected in parallel to the defeated of a low-voltage capacitance 14
Enter end, the output end of the low-voltage capacitance 14 is connected with first ground terminal 66.
The lower surface of the sealing base 6 is provided with the first low-voltage terminal 64, the second low-voltage terminal 65, the 3rd low-voltage terminal
67 and the 4th low-voltage terminal 68, the single-phase PT5 are provided with high-tension coil tap A51, high-tension coil tap B52, low-voltage coil
Tap A53 and low-voltage coil tap B54, the high-tension coil tap A51 and high-tension coil tap B52 are respectively connecting to described molten
The input of pipe A2 and fusion tube B3, the low-voltage coil tap A53 and low-voltage coil tap B54 respectively with the 3rd low-pressure end
The low-voltage terminal 68 of son 67 and the 4th connects.The ground terminal A66 ground connection, then between low-voltage terminal A64 and low-voltage terminal B65
Voltage is residual voltage, and the voltage between low-voltage terminal C67 and low-voltage terminal D68 is line voltage, and line voltage can be used for element
Power supply.
Compared with electromagnetic potential transformer, the impedance of electronic type zero sequential potential transformer is high, it is not easy to which be short-circuited failure
And resonance overvoltage, the small volume of voltage measurement component, lightweight, convenient install and maintenance, economy little to effect on power system
Practicality is more preferable.
It is more than that preferred embodiment of the present utility model is illustrated, but the utility model is created and is not limited to
The embodiment, those of ordinary skill in the art can also make a variety of etc. on the premise of without prejudice to the utility model spirit
With modification or replacement, the modification of these equivalents or replacement are all contained in the application claim limited range.
Claims (5)
1. a kind of outdoor type is powered and residual voltage measurement apparatus, it is characterised in that：Including a sealing base（6）, the sealing
Base（6）Voltage measurement component is inside cast with, the voltage measurement component includes a capacitive battery pressure sensor（1）, the electricity
Appearance formula voltage sensor（1）Terminals be connected to fusion tube A（2）, fusion tube B（3）With fusion tube C（4）, the fusion tube A（2）、
Fusion tube B（3）With fusion tube C（4）Input be connected to HV Terminal A（61）, HV Terminal B（62）With HV Terminal C
（63）, it is described to have HV Terminal A（61）, HV Terminal B（62）With HV Terminal C（63）It is arranged on the sealing base（6）'s
Upper end, the fusion tube A（2）Input and fusion tube B（3）Input between be connected with a single-phase PT（5）, the sealing base
On be provided with the first ground terminal（66）, the output end of the capacitive battery pressure sensor and first ground terminal（66）Even
Connect.
2. outdoor type according to claim 1 is powered and residual voltage measurement apparatus, it is characterised in that：The capacitive battery
Pressure sensor includes high-voltage capacitance A（11）, high-voltage capacitance B（12）With high-voltage capacitance C（13）, high-voltage capacitance A（11）, high pressure
Electric capacity B（12）With high-voltage capacitance C（13）Input respectively with the fusion tube A（2）, fusion tube B（3）With fusion tube C（4）Output end
Connection, high-voltage capacitance A（11）, high-voltage capacitance B（12）With high-voltage capacitance C（13）Output end be connected in parallel to a low-voltage capacitance
（14）Input, the low-voltage capacitance（14）Output end and first ground terminal（66）Connection.
3. outdoor type according to claim 1 is powered and residual voltage measurement apparatus, it is characterised in that：The sealing base
（6）Lower surface be provided with the first low-voltage terminal（64）, the second low-voltage terminal（65）, the 3rd low-voltage terminal（67）With the 4th low pressure
Terminal（68）.
4. outdoor type according to claim 3 is powered and residual voltage measurement apparatus, it is characterised in that：The single-phase PT
（5）It is provided with high-tension coil tap A（51）, high-tension coil tap B（52）, low-voltage coil tap A（53）With low-voltage coil tap B
（54）, the high-tension coil tap A（51）With high-tension coil tap B（52）It is respectively connecting to the fusion tube A（2）With fusion tube B（3）
Input, the low-voltage coil tap A（53）With low-voltage coil tap B（54）Respectively with the 3rd low-voltage terminal（67）With
4th low-voltage terminal（68）Connection.
5. outdoor type according to claim 1 is powered and residual voltage measurement apparatus, it is characterised in that：The sealing base
（6）Lower surface be provided with mounting seat（7）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621135822.1U CN206161718U (en) | 2016-10-18 | 2016-10-18 | Double zero sequence voltage measuring device of outdoor type power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621135822.1U CN206161718U (en) | 2016-10-18 | 2016-10-18 | Double zero sequence voltage measuring device of outdoor type power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206161718U true CN206161718U (en) | 2017-05-10 |
Family
ID=58654746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621135822.1U Active CN206161718U (en) | 2016-10-18 | 2016-10-18 | Double zero sequence voltage measuring device of outdoor type power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206161718U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443131A (en) * | 2016-10-18 | 2017-02-22 | 珠海许继电气有限公司 | Outdoor power-supply and zero-sequence-voltage measuring device |
| CN107359037A (en) * | 2017-05-27 | 2017-11-17 | 安徽华能集团电器有限公司 | A kind of 10kv open airs combination voltage transformer |
| WO2021098325A1 (en) * | 2019-11-18 | 2021-05-27 | 珠海许继电气有限公司 | Voltage acquisition and compensation circuit |
-
2016
- 2016-10-18 CN CN201621135822.1U patent/CN206161718U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443131A (en) * | 2016-10-18 | 2017-02-22 | 珠海许继电气有限公司 | Outdoor power-supply and zero-sequence-voltage measuring device |
| CN107359037A (en) * | 2017-05-27 | 2017-11-17 | 安徽华能集团电器有限公司 | A kind of 10kv open airs combination voltage transformer |
| WO2021098325A1 (en) * | 2019-11-18 | 2021-05-27 | 珠海许继电气有限公司 | Voltage acquisition and compensation circuit |
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