CN207133339U - A kind of broadband divider based on capacitance-resistance and series connection - Google Patents
A kind of broadband divider based on capacitance-resistance and series connection Download PDFInfo
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- CN207133339U CN207133339U CN201721003035.6U CN201721003035U CN207133339U CN 207133339 U CN207133339 U CN 207133339U CN 201721003035 U CN201721003035 U CN 201721003035U CN 207133339 U CN207133339 U CN 207133339U
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Abstract
The utility model provides a kind of broadband divider based on capacitance-resistance and series connection, including high-voltage arm and low-voltage arm；High-voltage arm is electrically connected with low-voltage arm；Low-voltage arm includes second partial pressure unit, and the second partial pressure unit includes tunable capacitor and second resistance, and tunable capacitor and second resistance are connected in parallel；Wherein, tunable capacitor is used to adjust its capacitance so that the product of its capacitance and second resistance resistance is equal with the resistance of high-voltage arm and the product of capacitance.The utility model solves the discreteness due to process conditions and component parameters, completes that the deviation between design load occurs after assembling, this deviation can not be corrected, and result in frequency response range can not still reach the technical problem of preferable design effect.
Description
Technical field
It the utility model is related to power measurement field, more particularly to a kind of broadband divider based on capacitance-resistance parallel-serial.
Background technology
In general, high voltage is pressed certain ratio by divider using electromagnetic coupled principle or electric capacity series connection voltage divider principle
Example is converted to small voltage, exports to measurement, metering or protection device.
In recent years, with the new energy power generation grid-connections such as solar energy, wind energy, and the variation of load end power mode, make
Direct current in power network and harmonic components increase, had a strong impact on conventional electromagnetic and the divider of capacitance-voltage-distributing type principle
Measurement accuracy.
In order to meet actual measurement request, divider should be able to accurate measurement DC component and 0-3kHz harmonic component.But
For existing electromagnetic type divider using silicon steel sheet as iron core, its frequency response is limited in 10-400Hz；Traditional capacitive divider
Formula divider can introduce high pressure transient process due to retaining residual charge in electrode.Therefore, the divider of both common principles
Direct current and harmonic component measurement request can not be met.
The divider of divider principle based on capacitance-resistance parallel-serial, broadband response is theoretically obtainable, but manufactured
During, due to process conditions and the discreteness of component parameters, complete that the deviation between design load occurs after assembling, this
One deviation can not be corrected, and result in frequency response range can not still reach the technical problem of preferable design effect.
Utility model content
The utility model provides a kind of broadband divider based on capacitance-resistance parallel-serial, solves due to process conditions
With the discreteness of component parameters, complete that the deviation between design load occurs after assembling, this deviation can not be corrected, caused
Frequency response range can not still reach the technical problem of preferable design effect.
The utility model provides a kind of broadband divider based on capacitance-resistance parallel-serial, including high-voltage arm and low-voltage arm；
The high-voltage arm is electrically connected with the low-voltage arm；
The low-voltage arm includes second partial pressure unit, and second partial pressure unit includes tunable capacitor and the second electricity
Resistance, the tunable capacitor and the second resistance are connected in parallel；
Wherein, the tunable capacitor be used for adjust its capacitance so that the product of its capacitance and second resistance resistance with
The resistance of the high-voltage arm and the product of capacitance are equal.
Preferably, the tunable capacitor includes metal polar plate, second time metal polar plate and distance adjusting mechanism on second；
Metal polar plate is parallel with second time metal polar plate on described second and is separated by preset distance setting；
The distance adjusting mechanism is used to adjust the preset distance.
Preferably, the distance adjusting mechanism includes：Insulated screw and insulation handwheel；
Metal polar plate and second time metal polar plate are circular pole plate on described second；
The insulated screw is vertically through metal polar plate, second time metal polar plate and the insulation on described second
Handwheel；
The insulation handwheel is provided with first through hole, and the insulation handwheel passes through the first through hole and the insulated screw
Threaded connection；
Metallic plate on the insulated screw and second.
Preferably, the both ends of the second resistance respectively with metal polar plate on described second and second time metal polar plate
Electrical connection.
Preferably, the high-voltage arm includes at least two first metal polar plates, and adjacent the first metal polar plate described two-by-two leads to
Insulating supporting intercolumniation is crossed every the second preset distance, and adjacent the first metal polar plate described two-by-two is parallel with first resistor.
Preferably, the outer of first metal polar plate is fixedly installed grading ring.
Preferably, it is high also to include insulation for a kind of broadband divider based on capacitance-resistance parallel-serial provided by the utility model
Press chamber and insulation low pressure chamber；
The Insulating A High-Voltage chamber is fixedly connected with the insulation low pressure chamber by the insulating supporting post；
The high-voltage arm is arranged at the Insulating A High-Voltage intracavitary；
The low-voltage arm is arranged in the insulation low pressure chamber；
The bottom of the Insulating A High-Voltage chamber is provided with seal socket, and the high-voltage arm extraction wire passes through the seal socket
It is electrically connected with the low-voltage arm.
Preferably, it is full of insulating gas in the high pressure chest and the low pressure chamber.
Preferably, a kind of broadband divider based on capacitance-resistance parallel-serial provided by the utility model also includes insulated umbrella
Set, the Insulating A High-Voltage chamber and the insulation low pressure chamber are arranged in the insulation umbrella cover.
Preferably, a kind of broadband divider based on capacitance-resistance parallel-serial provided by the utility model also includes base, institute
The bottom that base is stated with the insulating sleeve is fixedly connected；
After the insulated screw runs through the top of the base vertically by air seal set, pass through in the inside of the base
The first through hole is threadedly coupled with the insulation handwheel.
From above technical scheme, the utility model has advantages below：
The utility model provides a kind of broadband divider based on capacitance-resistance parallel-serial, including high-voltage arm and low-voltage arm；
The high-voltage arm is electrically connected with the low-voltage arm；The low-voltage arm includes second partial pressure unit, the second partial pressure list
Member includes tunable capacitor and second resistance, and the tunable capacitor and the second resistance are connected in parallel；Wherein, the tunable capacitor
For adjusting its capacitance so that the product of its capacitance and second resistance resistance and the resistance and electric capacity of the high-voltage arm
The product of value is equal.
The utility model is by adjusting the tunable capacitor of low-voltage arm or changing the second resistance of low-voltage arm so that high-voltage arm
With the relation of the capacitance resistance of low-voltage arm, meet the resistance of high-voltage arm and the product of capacitance and tunable capacitor and the second electricity
The product of resistance is equal, you can causes divider to accomplish that broadband is corresponding after the completion of assembling, have modified deviation, solve due to work
The discreteness of skill condition and component parameters, complete that the deviation between design load occurs after assembling, this deviation can not repair
Just, result in frequency response range can not still reach the technical problem of preferable design effect.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is embodiment of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to the accompanying drawing of offer.
Fig. 1 is that a kind of structure for broadband divider based on capacitance-resistance parallel-serial that the utility model embodiment provides is shown
It is intended to；
Fig. 2 is capacitance-resistance parallel-serial divider schematic diagram；
Fig. 3 is the front view of the first partial pressure unit in Fig. 1；
Fig. 4 is the upward view of the first partial pressure unit in Fig. 1；
Fig. 5 is the equivalent circuit diagram of the first partial pressure unit in Fig. 1；
Fig. 6 is the structural representation of the second partial pressure unit in Fig. 1；
Wherein, marked in figure as follows：
1st, high-voltage arm；2nd, low-voltage arm；3rd, metal polar plate on second；4th, second time metal polar plate；5th, insulated screw；6th, insulate
Handwheel；7th, the first metal polar plate；8th, insulating supporting post；9th, first resistor；10th, grading ring；11st, insulate umbrella cover；12nd, base；R1、
The resistance of high-voltage arm；C1, high-voltage arm capacitance；C2, tunable capacitor；R2, second resistance.
Embodiment
Fig. 1 to Fig. 6 is referred to, the utility model provides the one of a kind of broadband divider based on capacitance-resistance parallel-serial
Individual embodiment.
The utility model embodiment provides a kind of broadband divider based on capacitance-resistance parallel-serial, including the He of high-voltage arm 1
Low-voltage arm 2；
High-voltage arm 1 is electrically connected with the low-voltage arm 2；
Low-voltage arm 2 includes second partial pressure unit, and the second partial pressure unit includes tunable capacitor C2With second resistance R2, can
Adjust electric capacity C2With second resistance R2It is connected in parallel；
Wherein, tunable capacitor C2For adjusting its capacitance so that its capacitance and second resistance R2The product of resistance and height
The resistance R of pressure arm 11With capacitance C1Product it is equal.
The broadband divider based on capacitance-resistance parallel-serial that the utility model embodiment provides is to be based on capacitance-resistance parallel-serial
The principle of divider, intrinsic standoff ratio K can be obtained by formula (1)：
In formula (1)：K is intrinsic standoff ratio；U1、U2Primary voltage and secondary voltage respectively；R1、C1And R2、C2Respectively high and low pressure
The all-in resistance of arm and total capacitance in parallel；ω is the frequency of voltage source.
It can be seen that by formula (1)：The no-load voltage ratio K of divider, depend not only on resistance value, capacitance (R1、R2、C1、C2), and
And it is also the function of frequencies omega, that is to say, that it is nonlinear to frequency, is a complex variable.This does not meet linear sensing will
Ask, in order to obtain fixed no-load voltage ratio, control resistance, the configuration of appearance parameter, make to meet formula (2) condition in the design：
R1C1=R2C2 (2)
Formula (2) is substituted into formula (1), no-load voltage ratio relation is reduced to formula (3)：
Formula (3) shows that divider is purely resistive, and intrinsic standoff ratio K is only dependent upon R1、R2Configuration, it is no longer related to frequency, it is reason
The broadband divider based on capacitance-resistance parallel-serial thought.This is that the utility model ensures that voltage transformer has wideband response
The theoretical foundation of characteristic.
Formula (2) is the condition that formula (3) is set up, and is also to ensure that the key technology conditions of divider broadband properties, but due to
In practical operation, the otherness of component parameters and assembly technology is inevitable, can cause actual value will not with calculated value
Strict Compliance, i.e. formula (2) are untenable.The utility model solution is as follows：
It can be tried to achieve by formula (2)：
C2=(R1/R2)C1 (4)
Formula (4) shows, as long as fine setting C2Or change R2, so that it may formula (4) establishment, formula (2) formula (3) is also reverted to automatically
It is vertical.
The utility model embodiment is by C2It is designed to a kind of trimmable structure, or by R2It is designed as conveniently replaced knot
Structure, to ensure that divider parameter after completing to assemble remains to be corrected, to keep broadband response characteristic.
Further, the tunable capacitor C2Including metal polar plate 3, second time metal polar plate 4 on second and apart from adjustment
Mechanism；
Metal polar plate 3 is parallel with second time metal polar plate 4 on second and is separated by preset distance setting；
Distance adjusting mechanism is used to adjust preset distance.
In the utility model embodiment, in order to by C2Capacitance it is adjustable, then the metal polar plate 3 and on by second
A distance adjusting mechanism is set in the structure that two times metal polar plates 4 are formed, passes through metal in distance adjusting mechanism adjustment second
The distance between pole plate 3 and second time metal polar plate 4 adjust C2Capacitance.
Further, distance adjusting mechanism includes：Insulated screw 5 and insulation handwheel 6；
Metal polar plate 3 and second time metal polar plate 4 are circular pole plate on second；
Insulated screw 5 is vertically through metal polar plate on second 3, second time metal polar plate 4 and insulation handwheel 6；
Insulation handwheel 6 is provided with first through hole, and insulation handwheel 6 is threadedly coupled by first through hole with insulated screw 5；
Second time metal polar plate 4 is provided with the second through hole, and second time metal polar plate 4 passes through the second through hole and insulated screw 5
Threaded connection；
Metal polar plate 3 is connected through a screw thread fixation on insulated screw 5 and second.
In the utility model embodiment, by the rotation for the handwheel 6 that insulate, drive insulated screw 5 anti-relative to insulation handwheel 6
To rotation, meanwhile, second time metal polar plate 4 rotates in same direction with insulation handwheel 6, and second time metal polar plate 4 is in insulated screw about 5
It is mobile, so as to adjust on second the distance between metal polar plate 3 and second time metal polar plate 4, change tunable capacitor C2Electric capacity
Value, reach the purpose of the deviation between amendment and design load.
Further, second resistance R2Both ends be electrically connected respectively with metal polar plate on second 3 and second time metal polar plate 4
Connect.
In the utility model embodiment, second resistance R2Typically without changing, if after assembling between design load
Deviation is larger, can be by second resistance R2Changed to meet formula (2).
Further, high-voltage arm 1 includes at least two first metal polar plates 7, and adjacent first metal polar plate 7 two-by-two is by exhausted
Edge support column 8 is spaced the second preset distance, and adjacent first metal polar plate 7 two-by-two is parallel with first resistor 9.
The circular metal plate that the first metal polar plate 7 in the utility model embodiment is thickness 2mm, adjacent the first gold medal two-by-two
Category pole plate 7 is parallel with first resistor, the high-voltage arm 1 of divider is divided into some sections in vertical direction, every section is all one point
Press unit.Partial pressure unit is in vertical direction according to being equidistantly spaced from, access high voltage U1Afterwards, can be formed inside divider uniformly
Potential gradient landing, be advantageous to prevent the too high generation electric discharge phenomena of local voltage.Meanwhile the parallel connection electricity being made up of metal polar plate
Hold, possess more preferable temperature stability and time stability than fabricated capacitors, the capacity cell temperature drift for overcoming in the market to sell
With when influence of the drift to the degree of accuracy.
Further, the outer of first metal polar plate is fixedly installed grading ring 10.
The outer position of each piece of the first metal polar plate 7 is all installed with grading ring 10, grading ring 10 play uniformly, point
The effect of electric field is dissipated, prevents edge, the wedge angle flashover electric discharge under elevated pressure conditions of hardware.
Further, a kind of broadband divider based on capacitance-resistance parallel-serial that the utility model embodiment provides also wraps
Include Insulating A High-Voltage chamber and insulation low pressure chamber；
Insulating A High-Voltage chamber is fixedly connected with insulation low pressure chamber by insulating supporting post；
High-voltage arm 1 is arranged at Insulating A High-Voltage intracavitary；
Low-voltage arm 2 is arranged in insulation low pressure chamber；
The bottom of Insulating A High-Voltage chamber is provided with seal socket, and the extraction wire of high-voltage arm 1 passes through seal socket and the electricity of low-voltage arm 2
Gas connects.
It should be noted that Insulating A High-Voltage chamber is the cavity individually sealed, high-voltage arm 1 and low-voltage arm with insulation low pressure chamber
2, in order to realize electrical connection, it is necessary to set seal socket in the bottom of Insulating A High-Voltage chamber, are drawn high-voltage arm 1 using seal socket
The wire gone out is connected in low-voltage arm 2.
Further, it is full of insulating gas in Insulating A High-Voltage chamber and insulation low pressure chamber.
In the utility model embodiment, insulating gas is sulfur hexafluoride gas, but among the application of reality, according to not
Same voltage requirements, can select other different insulating gas, will not be described here.
Further, a kind of broadband divider based on capacitance-resistance parallel-serial that the utility model embodiment provides also wraps
Insulation umbrella cover 11 is included, Insulating A High-Voltage chamber and insulation low pressure chamber are arranged in insulation umbrella cover 11.
Further, a kind of broadband divider based on capacitance-resistance parallel-serial that the utility model embodiment provides also wraps
Base 12 is included, the base 12 is fixedly connected with the bottom for the umbrella cover 11 that insulate；
Insulated screw 5 runs through the top of base 12 by air seal set vertically, passes through first through hole in the inside of base 12
It is threadedly coupled with insulation handwheel 6.
In the present embodiment, the actual operation insulation handwheel 6 in base 12, because low pressure chamber needs to keep sealing, insulation
Screw 5 runs through the top of base 12 by air seal set, during manual operation, insulation handwheel 6 is rotated in base 12, drives insulation
Screw 5 rotates, and second time metal polar plate 4 in low pressure chamber rotates backward because of the rotation of insulated screw 5 so that under second
The part that metal polar plate 4 remains in low pressure chamber in insulated screw 5 moves up and down, and changes metal polar plate 3 and second time gold on second
Belong to the distance between pole plate 4, so as to change tunable capacitor C2。
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, the corresponding process in preceding method embodiment is may be referred to, will not be repeated here.
Described above, above example is only to illustrate the technical solution of the utility model, rather than its limitations；Although ginseng
The utility model is described in detail according to previous embodiment, it will be understood by those within the art that：It is still
Technical scheme described in foregoing embodiments can be modified, or which part technical characteristic is equally replaced
Change；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the utility model technical scheme
Spirit and scope.
Claims (10)
1. a kind of broadband divider based on capacitance-resistance parallel-serial, it is characterised in that including high-voltage arm and low-voltage arm；
The high-voltage arm is electrically connected with the low-voltage arm；
The low-voltage arm includes second partial pressure unit, and second partial pressure unit includes tunable capacitor and second resistance, institute
State tunable capacitor and the second resistance is connected in parallel；
Wherein, the tunable capacitor be used for adjust its capacitance so that the product of its capacitance and second resistance resistance with it is described
The resistance of high-voltage arm and the product of capacitance are equal.
2. the broadband divider according to claim 1 based on capacitance-resistance parallel-serial, it is characterised in that the adjustable electric
Appearance includes metal polar plate on second, second time metal polar plate and distance adjusting mechanism；
Metal polar plate is parallel with second time metal polar plate on described second and is separated by preset distance setting；
The distance adjusting mechanism is used to adjust the preset distance.
3. the broadband divider according to claim 2 based on capacitance-resistance parallel-serial, it is characterised in that the distance is adjusted
Complete machine structure includes：Insulated screw and insulation handwheel；
Metal polar plate and second time metal polar plate are circular pole plate on described second；
The insulated screw is vertically through metal polar plate, second time metal polar plate and the insulation hand on described second
Wheel；
The insulation handwheel is provided with first through hole, and the insulation handwheel passes through the first through hole and the insulated screw screw thread
Connection；
Second time metal polar plate is provided with the second through hole, second time metal polar plate by second through hole with it is described
Insulated screw is threadedly coupled；
Metal polar plate is connected through a screw thread fixation on the insulated screw and second.
4. the broadband divider according to claim 3 based on capacitance-resistance parallel-serial, it is characterised in that second electricity
The both ends of resistance electrically connect with metal polar plate on described second and second time metal polar plate respectively.
5. the broadband divider according to claim 4 based on capacitance-resistance parallel-serial, it is characterised in that the high-voltage arm
Including at least two first metal polar plates, adjacent the first metal polar plate described two-by-two by insulating supporting intercolumniation every second it is preset away from
From, and adjacent the first metal polar plate described two-by-two is parallel with first resistor.
6. the broadband divider according to claim 5 based on capacitance-resistance parallel-serial, it is characterised in that first gold medal
The outer of category pole plate is fixedly installed grading ring.
7. the broadband divider according to claim 6 based on capacitance-resistance parallel-serial, it is characterised in that also include insulation
High pressure chest and insulation low pressure chamber；
The Insulating A High-Voltage chamber is fixedly connected with the insulation low pressure chamber by the insulating supporting post；
The high-voltage arm is arranged at the Insulating A High-Voltage intracavitary；
The low-voltage arm is arranged in the insulation low pressure chamber；
The bottom of the Insulating A High-Voltage chamber is provided with seal socket, and the high-voltage arm extraction wire passes through the seal socket and institute
State low-voltage arm electrical connection.
8. the broadband divider according to claim 7 based on capacitance-resistance parallel-serial, it is characterised in that the insulation is high
Insulating gas is full of in pressure chamber and the insulation low pressure chamber.
9. the broadband divider according to claim 8 based on capacitance-resistance parallel-serial, it is characterised in that also include insulation
Umbrella cover, the Insulating A High-Voltage chamber and the insulation low pressure chamber are arranged in the insulation umbrella cover.
10. the broadband divider according to claim 9 based on capacitance-resistance parallel-serial, it is characterised in that also the bottom of including
Seat, the base are fixedly connected with the bottom of the insulating sleeve；
After the insulated screw runs through the top of the base vertically by air seal set, pass through in the inside of the base described
First through hole is threadedly coupled with the insulation handwheel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721003035.6U CN207133339U (en) | 2017-08-11 | 2017-08-11 | A kind of broadband divider based on capacitance-resistance and series connection |
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| CN201721003035.6U CN207133339U (en) | 2017-08-11 | 2017-08-11 | A kind of broadband divider based on capacitance-resistance and series connection |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107271745A (en) * | 2017-08-11 | 2017-10-20 | 广东电网有限责任公司电力科学研究院 | A kind of broadband divider based on capacitance-resistance and series connection |
| CN109297897A (en) * | 2018-12-13 | 2019-02-01 | 福州大学 | The experimental rig and method of the high voltage electric field environmental corrosion of controllable temperature and humidity |
| CN109324305A (en) * | 2018-11-19 | 2019-02-12 | 中国电力科学研究院有限公司 | Impulse voltage divider linearity calibration capacitor bleeder mechanism |
| CN112051434A (en) * | 2020-08-31 | 2020-12-08 | 国网山东省电力公司电力科学研究院 | Precise alternating current-direct current broadband voltage dividing device and method |
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2017
- 2017-08-11 CN CN201721003035.6U patent/CN207133339U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107271745A (en) * | 2017-08-11 | 2017-10-20 | 广东电网有限责任公司电力科学研究院 | A kind of broadband divider based on capacitance-resistance and series connection |
| CN109324305A (en) * | 2018-11-19 | 2019-02-12 | 中国电力科学研究院有限公司 | Impulse voltage divider linearity calibration capacitor bleeder mechanism |
| CN109297897A (en) * | 2018-12-13 | 2019-02-01 | 福州大学 | The experimental rig and method of the high voltage electric field environmental corrosion of controllable temperature and humidity |
| CN109297897B (en) * | 2018-12-13 | 2023-08-18 | 福州大学 | Temperature and humidity controllable high-voltage electric field environment corrosion test device and method |
| CN112051434A (en) * | 2020-08-31 | 2020-12-08 | 国网山东省电力公司电力科学研究院 | Precise alternating current-direct current broadband voltage dividing device and method |
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