CN205246733U - Inversion formula capacitive voltage divider - Google Patents
Inversion formula capacitive voltage divider Download PDFInfo
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- CN205246733U CN205246733U CN201521075854.2U CN201521075854U CN205246733U CN 205246733 U CN205246733 U CN 205246733U CN 201521075854 U CN201521075854 U CN 201521075854U CN 205246733 U CN205246733 U CN 205246733U
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Abstract
The utility model provides a stable performance is reliable, design uniqueness, simple structure, the lower inversion formula capacitive voltage divider of cost. It includes the insulator, and the secondary divides the clamp plate, and the lead wire sets up the body in the insulator upper end to and set gradually at the inside branch clamp plate and lead wire shielding of the body in the extroversion, body both sides are provided with the wiring board respectively, sulfur hexafluoride fills in the inside confined cavity behind insulator and the body intercommunication, divide to be between the clamp plate and the body and wait the clearance setting, form first electric capacity C1 between the body and the branch clamp plate, the lead wire shielding is including the shielded -plate tube to reach the plate electrode that sets up with clearances such as dividing the clamp plate, the plate electrode is connected to the one end of shielded -plate tube, and it is fixed that the other end passes the inside back ground connection of insulator, it forms second electric capacity C2 to divide between clamp plate and the plate electrode, lead wire one end is connected with dividing the clamp plate through at least three sampling point, and the input that the secondary divides the clamp plate is connected after passing the shielded -plate tube to the other end, and the secondary divides the required voltage of output of clamp plate.
Description
Technical field
The utility model relates to high-tension measurement field, is specially a kind of inversion type capacitive divider.
Background technology
Along with the development of high voltage power transmission technology, power system is also constantly carried the requirement of power equipmentHeight, not only requires that product function is more and more reliable, precision is more and more higher, also expects install and adjust simultaneouslyMake, change the birth of product easily. As everyone knows, concerning power equipment, high reliability, heightPrecision is to judge the whether qualified prerequisite of high-pressure measurement mechanism always, through development for many years, electric powerEquipment has all met high reliability and high-precision requirement substantially, but its most of complex structures, costHigh, manufacturing process is various.
In addition, the coverage rate of electric power networks also progressively increases, device category on various device in power systemAlso constantly increase, capacitive divider is as a kind of visual plant of measuring power system voltage, and its kind alsoIncrease along with the difference of demand. But the complex structure of existing power capacitor, functional reliability is low,Install complicated.
Utility model content
For problems of the prior art, the utility model provides a kind of stable and reliable for performance, designUnique, simple in structure, lower-cost inversion type capacitive divider.
The utility model is to be achieved through the following technical solutions:
A kind of inversion type capacitive divider, comprises insulator, second divided voltage plate, and lead-in wire, is arranged on insulationThe body of sub-upper end, and be successively set on from outside to inside point pressing plate of body inside and the shielding that goes between; BodyShell both sides are respectively arranged with terminal plate; In the cavity of the enclose inside after insulator and the body are communicated with, fill sixSulfur fluoride; Between point pressing plate and the body, be and wait gap setting; Between the body and point pressing plate, form the first electric capacityC1; Lead-in wire shielding comprises shielded-plate tube, and the battery lead plate arranging with the gap such as point pressing plate; Shielded-plate tubeOne end connecting electrode plate, the other end is fixed through ground connection behind insulator inside; Divide between pressing plate and battery lead plateForm the second capacitor C 2; Lead-in wire one end is connected with a point pressing plate through at least three sampled points, and the other end is wornCross the input that connecting secondary after shielded-plate tube divides pressing plate, the output output required voltage of second divided voltage plate.
Preferably, second divided voltage plate comprises the first adjustable resistance R1 and the second adjustable resistance R2, andThe 3rd capacitor C 3; Described the first adjustable resistance R1 and the second adjustable resistance R2 connect afterwards and the second electric capacityC2 parallel connection; The first adjustable resistance R1 or the second adjustable resistance R2 both end voltage are output end voltage; InstituteState the 3rd capacitor C 3 in parallel with the second capacitor C 2.
Further, the capacitance of the 3rd capacitor C 3 is much larger than capacitance and the stray electrical of the first capacitor C 1The capacitance sum of holding; Described stray capacitance is point pressing plate space stray capacitance of self-assembling formation over the ground.
Preferably, the body and a point pressing plate are all sphere setting.
Preferably, divide the edge of pressing plate and battery lead plate to be all the round and smooth flange of inside setting.
Preferably, insulator fixes on the ground by base.
Compared with prior art, the utlity model has following useful technique effect:
The utility model utilizes product self body to serve as the high-voltage capacitance plate of capacitive divider, with a point pressing plateAs low-voltage capacitance version, not only cost-saving, and can make capacitive divider Electric Field Distribution more equalEven; Can be by regulating its point of high-low voltage capacitor plate control to be clipped to the distance L 1 of lead-in wire shielding and L2Proportionate relationship can regulate the value of C1 and C2, greatly dwindles the capacitance partial pressure body of each electric pressureProduct moment is different; Utilize standardized production. Coordinate the Voltage-output after adopting multidraw average to ensureThe reliability and stability of sampled signal; Can adopt mould to make, properties of product will be stablized, and not be subject to peopleThe impact of member's technical ability, ensures the reliable and stable of product quality; Be applicable to mass and large-scale production.
Further, the utility model can fall greatly by increase by the 3rd capacitor C 3 on second divided voltage plateThe impact of low spatial stray capacitance Cx on dividing potential drop precision.
Further, utilize the electron plate going between in shielding in bearing low-voltage side electrode effect, profitCost-saving with shielded-plate tube time, can also mask in signals transmission space electromagnetic interference to signalImpact.
Further, the utility model high pressure, low pressure divide pressing plate to adopt spherical structure, and enter in edgeRow flange makes space electric field even after processing.
Brief description of the drawings
Fig. 1 is the structural representation described in the utility model example.
Fig. 2 is the electrical principle schematic diagram described in the utility model example.
In figure: insulator 1, the body 2, point pressing plate 3, lead-in wire shielding 4, second divided voltage plate 5, lead-in wire6, terminal plate 21, battery lead plate 41, shielded-plate tube 42.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail, described in be to the utility modelExplanation instead of restriction.
A kind of inversion type capacitive divider of the utility model, as depicted in figs. 1 and 2, by electric capacity is dividedDepressor is placed in insulator top, adopts sulfur hexafluoride gas to realize self insulation. Employing voltage transformerThe high pressure that the body 2 serves as capacitive divider divides pressing plate, and a point pressing plate 3 divides pressing plate as low pressure; Utilize the body2 and low pressure divide between pressing plate and form the first capacitor C 1, utilize low pressure to divide in pressing plate and lead-in wire shielding 4The second capacitor C 2 forming between battery lead plate 41. And on second divided voltage plate, increase by the 3rd capacitor C 3,Can greatly reduce the impact of space stray capacitance Cx on dividing potential drop precision. Battery lead plate 41 is born low-pressure sideElectrode effect, lead-in wire shielded-plate tube 42 can mask in signals transmission space electromagnetic interference to signalImpact. On second divided voltage plate, adopt multidraw to ensure sampled signal by the 6 pairs of points of pressing plates 3 that go betweenReliability, stability. Preferably the body 2 and a point pressing plate 3 are adopted to spherical structure, its electric field is dividedCloth is even.
When use, the utility model capacitance partial pressure part is placed in insulator top, utilizes capacitive dividerThe body 2 serves as high pressure and divides pressing plate. In the time that once voltage U n is applied on terminal plate 21, whole bodyShell 2 body potentials just form the first capacitor C 1 between the body 2 and point pressing plate 3; Point pressing plate 3 again andBetween battery lead plate 41 in lead-in wire shielding 4, form the second capacitor C 2; Wherein, lead-in wire shielding 4 is by canBe abutted against ground wire grounded, ensure battery lead plate 42 keep earth potential always; Regulate high-low voltage capacitor plate control L1Can regulate the value of C1 and C2 with the proportionate relationship of L2, the value that obtains C1 and C2 just can be controlledLow pressure is divided the voltage U 1 on pressing plate; Wherein, as depicted in figs. 1 and 2, high-low voltage capacitor plate divides and is clipped toThe proportionate relationship electric pressure used according to capacitive divider between distance L 1 and the L2 of lead-in wire shieldingAnd determine. Then, capacitor C 2 is incorporated to capacitor C 3, regulates the size of C3 capacitance, can be at C3Two ends obtain a magnitude of voltage U2, and wherein the value of C3 will be far longer than space stray electrical capacitance Cx andThe capacitance sum of one capacitor C 1, Cx is old negligible on the impact of dividing potential drop like this. Finally,Obtain our required magnitude of voltage Uout by adjustable resistance R1, R2 on second divided voltage plate. Pass throughCan be calculated the coefficient of dividing potential drops at different levels, can know the occurrence of primary voltage Un.
Claims (6)
1. an inversion type capacitive divider, is characterized in that, comprises insulator (1), second divided voltage plate(5), go between (6), be arranged on the body (2) of insulator (1) upper end, and from outside to inside successivelyBe arranged on the inner point pressing plate (3) of the body (2) and lead-in wire shielding (4);
The described body (2) both sides are respectively arranged with terminal plate (21); Insulator (1) and the body(2) in the cavity of the enclose inside after connection, fill sulfur hexafluoride;
The gap setting such as between described point of pressing plate (3) and the body (2), be; The body (2) and dividing potential dropBetween plate (3), form the first capacitor C 1;
Described lead-in wire shielding (4) comprises shielded-plate tube (42), and establishes with gaps such as dividing pressing plate (3)The battery lead plate (41) of putting; One end connecting electrode plate (41) of shielded-plate tube (42), the other end is through insulationAfter son (1) is inner, ground connection is fixed; Divide between pressing plate (3) and battery lead plate (41) and form the second electric capacityC2；
Described lead-in wire (6) one end is connected with a point pressing plate (3) through at least three sampled points, the other endDivide the input of pressing plate (5) through connecting secondary after shielded-plate tube (42), second divided voltage plate (5) defeatedGo out end output required voltage.
2. a kind of inversion type capacitive divider according to claim 1, is characterized in that, secondary dividesPressing plate (5) comprises the first adjustable resistance R1 and the second adjustable resistance R2, and the 3rd capacitor C 3;
In parallel with the second capacitor C 2 after described the first adjustable resistance R1 and the second adjustable resistance R2 series connection;The first adjustable resistance R1 or the second adjustable resistance R2 both end voltage are output end voltage;
Described the 3rd capacitor C 3 is in parallel with the second capacitor C 2.
3. a kind of inversion type capacitive divider according to claim 2, is characterized in that, the 3rd electricityHold the capacitance of C3 much larger than the capacitance of the first capacitor C 1 and the capacitance sum of stray capacitance; InstituteThe stray capacitance of stating is point pressing plate (3) space stray capacitance for self-assembling formation over the ground.
4. a kind of inversion type capacitive divider according to claim 1, is characterized in that the body(2) and a point pressing plate (3) be all sphere setting.
5. a kind of inversion type capacitive divider according to claim 1, is characterized in that, point pressing plate(3) and the edge of battery lead plate (41) be all the round and smooth flange of inside setting.
6. a kind of inversion type capacitive divider according to claim 1, is characterized in that insulator(1) fix on the ground by base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521075854.2U CN205246733U (en) | 2015-12-21 | 2015-12-21 | Inversion formula capacitive voltage divider |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521075854.2U CN205246733U (en) | 2015-12-21 | 2015-12-21 | Inversion formula capacitive voltage divider |
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| CN205246733U true CN205246733U (en) | 2016-05-18 |
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| CN201521075854.2U Active CN205246733U (en) | 2015-12-21 | 2015-12-21 | Inversion formula capacitive voltage divider |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109274275A (en) * | 2018-09-30 | 2019-01-25 | 中国电力科学研究院有限公司 | A kind of device and method taking energy in transmission line of electricity hot end |
| CN109725193A (en) * | 2019-02-25 | 2019-05-07 | 云南电网有限责任公司红河供电局 | It is a kind of for running the suspension type neutral point undervoltage detection means for doing anti-defect diagonsis |
| WO2022049891A1 (en) * | 2020-09-07 | 2022-03-10 | 株式会社明電舎 | Vacuum-capacitor-type voltage transformer |
-
2015
- 2015-12-21 CN CN201521075854.2U patent/CN205246733U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109274275A (en) * | 2018-09-30 | 2019-01-25 | 中国电力科学研究院有限公司 | A kind of device and method taking energy in transmission line of electricity hot end |
| CN109725193A (en) * | 2019-02-25 | 2019-05-07 | 云南电网有限责任公司红河供电局 | It is a kind of for running the suspension type neutral point undervoltage detection means for doing anti-defect diagonsis |
| WO2022049891A1 (en) * | 2020-09-07 | 2022-03-10 | 株式会社明電舎 | Vacuum-capacitor-type voltage transformer |
| JP2022044196A (en) * | 2020-09-07 | 2022-03-17 | 株式会社明電舎 | Vacuum capacitor type instrument transformer |
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