CN204374359U - A kind of GIS partial discharge pick-up unit - Google Patents
A kind of GIS partial discharge pick-up unit Download PDFInfo
- Publication number
- CN204374359U CN204374359U CN201420544651.2U CN201420544651U CN204374359U CN 204374359 U CN204374359 U CN 204374359U CN 201420544651 U CN201420544651 U CN 201420544651U CN 204374359 U CN204374359 U CN 204374359U
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- radio frequency
- insulcrete
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Abstract
The utility model discloses a kind of GIS partial discharge pick-up unit, comprise radio frequency connector and ring flange, ring flange is arranged on housing, radio frequency connector is arranged on the outside of ring flange, induction installation is arranged on enclosure interior, and induction installation is connected with radio frequency connector by guiding device, and described induction installation comprises inner flange plate, outside flange plate and insulcrete, insulcrete is arranged between inner flange and outside flange, and inner flange, insulcrete are connected by bolt with outside flange; Described guiding device is conducting rod, conducting rod one end is connected to the center of inner flange, the endoporus of insulcrete and outside flange is passed in the bar portion of conducting rod, its other end passes ring flange and is connected with radio frequency connector, described bolt arranged outside has the first inductance, is in series with amplifying circuit and filtering circuit between radio frequency connector and conducting rod.The utility model can improve the deficiencies in the prior art, by increasing adjunct circuit, realizes effective filtration of centering low-frequency interference signal.
Description
Technical field
The utility model relates to a kind of electric power pick-up unit, especially a kind of GIS partial discharge pick-up unit.
Background technology
In prior art, the detection of GIS partial discharge has several modes such as capacitance method, UHF method and supercritical ultrasonics technology, and wherein UHF method is employed one the most widely.A kind of UHF method that discloses Chinese utility model patent CN 203643559 U detects the inner shelf depreciation sensing device of GIS, achieves the filtration of low frequency signal.But, although this structure can play the effect suppressing low frequency signal interference, there is filter effect by small inductance filtering too linear, cannot undesired signal frequency wide in range between low frequency signal and high-frequency signal effectively be filtered.If only increase inductance value, then can slacken the filtration of inductance to low frequency signal.
utility model content
The technical problems to be solved in the utility model is to provide a kind of GIS partial discharge pick-up unit, can solve the deficiencies in the prior art, by increasing adjunct circuit, realizes effective filtration of centering low-frequency interference signal.
For solving the problems of the technologies described above, technical solution adopted in the utility model is as follows.
A kind of GIS partial discharge pick-up unit, comprise radio frequency connector and ring flange, ring flange is arranged on housing, radio frequency connector is arranged on the outside of ring flange, induction installation is arranged on enclosure interior, induction installation is connected with radio frequency connector by guiding device, described induction installation comprises inner flange plate, outside flange plate and insulcrete, inner flange plate is flat-face flange, disc with holes centered by insulcrete, its cylindrical is identical with the cylindrical of inner flange plate, insulcrete is arranged between inner flange and outside flange, inner flange, insulcrete is connected by bolt with outside flange, outside flange is pipe flange, outside flange one end is connected with insulcrete, the other end is connected with ring flange by bolt, described guiding device is conducting rod, conducting rod one end is connected to the center of inner flange, the endoporus of insulcrete and outside flange is passed in the bar portion of conducting rod, its other end passes ring flange and is connected with radio frequency connector, described bolt arranged outside has the first inductance, is in series with amplifying circuit and filtering circuit between radio frequency connector and conducting rod,
Filtering circuit comprises operational amplifier, the inverting input of operational amplifier is by the first resistance eutral grounding, the inverting input of operational amplifier is connected to the output terminal of operational amplifier simultaneously by the second resistance, the positive input of operational amplifier is in series with the first electric capacity and the second electric capacity, first electric capacity is connected to radio frequency connector, second Capacitance parallel connection has the second inductance, the 3rd resistance is connected with between first electric capacity and operational amplifier output terminal, by the 3rd inductance and the 3rd capacity earth between first electric capacity and amplification circuit output end, the output terminal of operational amplifier is connected to the input end of amplifying circuit,
Amplifying circuit comprises P-channel enhancement type isolated gate FET, the grid of P-channel enhancement type isolated gate FET is by the input end of connection the 4th electric capacity as amplifying circuit, the drain electrode of P-channel enhancement type isolated gate FET is connected to external power supply by the 4th resistance, the drain electrode of P-channel enhancement type isolated gate FET is connected to conducting rod by the 5th electric capacity simultaneously, the source electrode of P-channel enhancement type isolated gate FET is by the 5th resistance eutral grounding, and the 5th resistor coupled in parallel has the 6th electric capacity.
The beneficial effect adopting technique scheme to bring is: the utility model is by increasing filtering circuit and amplifying circuit, the signal of radio frequency connector collection carries out high-pass filtering, and then through amplifying circuit, high frequency electrical signal is amplified, improve the induced voltage level of the first inductance to high-frequency signal, thus realize the high sensitive of sensor, the non-linear filtration to centering low frequency signal can be realized again simultaneously, improve filter effect.
Accompanying drawing explanation
Fig. 1 is the structural drawing of the utility model embodiment.
Fig. 2 is the circuit diagram of accessory circuits in the utility model embodiment.
Fig. 3 is frequency characteristic figure when separately carrying out filtering by bolt in prior art.
Fig. 4 is the frequency characteristic figure of the utility model embodiment when carrying out filtering.
In figure: 1, radio frequency connector; 2, conducting rod; 3, ring flange; 4, inner flange; 5, insulcrete; 6, outside flange; 7, bolt; 8, the collar; L1, the first inductance; L2, the second inductance; L3, the 3rd inductance; R1, the first resistance; R2, the second resistance; R3, the 3rd resistance; R4, the 4th resistance; R5, the 5th resistance; C1, the first electric capacity; C2, the second electric capacity; C3, the 3rd electric capacity; C4, the 4th electric capacity; C5, the 5th electric capacity; C6, the 6th electric capacity; A, operational amplifier; Q, P-channel enhancement type isolated gate FET; Vcc, external power supply.
Embodiment
The standardized element used in the utility model all can commercially, be not described in detail in this.
With reference to Fig. 1-2, the present embodiment comprises radio frequency connector 1 and ring flange 3, ring flange 3 is arranged on housing, radio frequency connector 1 is arranged on the outside of ring flange 3, induction installation is arranged on enclosure interior, induction installation is connected with radio frequency connector by guiding device, described induction installation comprises inner flange 4 plate, outside flange 6 plate and insulcrete 5, inner flange 4 plate is flat-face flange, disc with holes centered by insulcrete 5, its cylindrical is identical with the cylindrical of inner flange 4 plate, insulcrete 5 is arranged between inner flange 4 and outside flange 6, inner flange 4, insulcrete 5 is connected by bolt 7 with outside flange 6, outside flange 6 is pipe flange, outside flange 6 one end is connected with insulcrete 5, the other end is connected with ring flange 3 by bolt 7, described guiding device is conducting rod 2, conducting rod 2 one end is connected to the center of inner flange 4, the endoporus of insulcrete 5 and outside flange 6 is passed in the bar portion of conducting rod 2, its other end passes ring flange 3 and is connected with radio frequency connector 1, described bolt 7 arranged outside has the first inductance L 1, is in series with amplifying circuit and filtering circuit between radio frequency connector 1 and conducting rod 2,
Filtering circuit comprises operational amplifier A, the inverting input of operational amplifier A is by the first resistance R1 ground connection, the inverting input of operational amplifier A is connected to the output terminal of operational amplifier A simultaneously by the second resistance R2, the positive input of operational amplifier A is in series with the first electric capacity C1 and the second electric capacity C2, first electric capacity C1 is connected to radio frequency connector 1, second electric capacity C2 is parallel with the second inductance L 2, the 3rd resistance R3 is connected with between first electric capacity C1 and operational amplifier A output terminal, by the 3rd inductance L 3 and the 3rd electric capacity C3 ground connection between first electric capacity C1 and amplification circuit output end, the output terminal of operational amplifier A is connected to the input end of amplifying circuit,
Amplifying circuit comprises P-channel enhancement type isolated gate FET Q, the grid of P-channel enhancement type isolated gate FET Q is by the input end of connection the 4th electric capacity C4 as amplifying circuit, the drain electrode of P-channel enhancement type isolated gate FET Q is connected to external power supply Vcc by the 4th resistance R4, the drain electrode of P-channel enhancement type isolated gate FET Q is connected to conducting rod 2 by the 5th electric capacity C5 simultaneously, the source electrode of P-channel enhancement type isolated gate FET Q is by the 5th resistance R5 ground connection, and the 5th resistance R5 is parallel with the 6th electric capacity C6.
In insulcrete 5, be provided with the collar 8, the first inductance L 1 is arranged in the collar 8, and bolt 7 from passing in the middle of the collar 8, thus realizes coordinating of the first inductance L 1 and bolt 7.Conducting rod 2 all adopts wire directly to connect with amplifying circuit, radio frequency connector 1 with the connection of filtering circuit, belongs to the common practise that circuit connects, and the technical scheme of what signals collecting part adopted the is patent documentation quoted in background technology, is not described in detail in this.
Wherein, the first resistance R1 is 5k Ω, and the second resistance R2 is 10k Ω, and the 3rd resistance R3 is 8k Ω, and the 4th resistance R4 is 2k Ω, and the 5th resistance R5 is 20k Ω.First electric capacity C1 is 50 μ F, and the second electric capacity C2 is 10 μ F, and the 3rd electric capacity C3 is 600pF, 4th electric capacity C4 is 20 μ F, and the 5th electric capacity C5 is 30 μ F, and the 6th electric capacity C6 is 500pF, first inductance L 1 is 250mH, and the second inductance L 2 is 30mH, and the 3rd inductance L 3 is 100mH.
The positive input of operational amplifier A can effectively suppress the signal of medium and low frequency to input, and high-frequency signal, by after filtering circuit, is amplified by amplifying circuit, the number of winning the confidence in the tube voltage drop of P-channel enhancement type isolated gate FET Q, realizes signal and amplifies.With reference to Fig. 2 and Fig. 3, obviously can find out that the present embodiment effectively can suppress the noise of low and medium frequency, and cutoff frequency is high, can reduce the residual rate of low and medium frequency.
More than show and describe ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (1)
1. a GIS partial discharge pick-up unit, comprise radio frequency connector (1) and ring flange (3), ring flange (3) is arranged on housing, radio frequency connector (1) is arranged on the outside of ring flange (3), induction installation is arranged on enclosure interior, induction installation is connected with radio frequency connector by guiding device, described induction installation comprises inner flange (4) plate, outside flange (6) plate and insulcrete (5), inner flange (4) plate is flat-face flange, disc with holes centered by insulcrete (5), its cylindrical is identical with the cylindrical of inner flange (4) plate, insulcrete (5) is arranged between inner flange (4) and outside flange (6), inner flange (4), insulcrete (5) is connected by bolt (7) with outside flange (6), outside flange (6) is pipe flange, outside flange (6) one end is connected with insulcrete (5), the other end is connected with ring flange (3) by bolt (7), described guiding device is conducting rod (2), conducting rod (2) one end is connected to the center of inner flange (4), the endoporus of insulcrete (5) and outside flange (6) is passed in the bar portion of conducting rod (2), its other end passes ring flange (3) and is connected with radio frequency connector (1), it is characterized in that: described bolt (7) arranged outside has the first inductance (L1), between radio frequency connector (1) and conducting rod (2), be in series with amplifying circuit and filtering circuit,
Filtering circuit comprises operational amplifier (A), the inverting input of operational amplifier (A) is by the first resistance (R1) ground connection, the inverting input of operational amplifier (A) is connected to the output terminal of operational amplifier (A) simultaneously by the second resistance (R2), the positive input of operational amplifier (A) is in series with the first electric capacity (C1) and the second electric capacity (C2), first electric capacity (C1) is connected to radio frequency connector (1), second electric capacity (C2) is parallel with the second inductance (L2), the 3rd resistance (R3) is connected with between first electric capacity (C1) and operational amplifier (A) output terminal, by the 3rd inductance (L3) and the 3rd electric capacity (C3) ground connection between first electric capacity (C1) and amplification circuit output end, the output terminal of operational amplifier (A) is connected to the input end of amplifying circuit,
Amplifying circuit comprises P-channel enhancement type isolated gate FET (Q), the grid of P-channel enhancement type isolated gate FET (Q) is by the input end of connection the 4th electric capacity (C4) as amplifying circuit, the drain electrode of P-channel enhancement type isolated gate FET (Q) is connected to external power supply (Vcc) by the 4th resistance (R4), the drain electrode of P-channel enhancement type isolated gate FET (Q) is connected to conducting rod (2) by the 5th electric capacity (C5) simultaneously, the source electrode of P-channel enhancement type isolated gate FET (Q) is by the 5th resistance (R5) ground connection, 5th resistance (R5) is parallel with the 6th electric capacity (C6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420544651.2U CN204374359U (en) | 2014-09-22 | 2014-09-22 | A kind of GIS partial discharge pick-up unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420544651.2U CN204374359U (en) | 2014-09-22 | 2014-09-22 | A kind of GIS partial discharge pick-up unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204374359U true CN204374359U (en) | 2015-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420544651.2U Expired - Fee Related CN204374359U (en) | 2014-09-22 | 2014-09-22 | A kind of GIS partial discharge pick-up unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204374359U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106998644A (en) * | 2016-01-22 | 2017-08-01 | 鸿富锦精密电子(郑州)有限公司 | Electrostatic discharge protective circuit and the electronic installation with the electrostatic discharge protective circuit |
-
2014
- 2014-09-22 CN CN201420544651.2U patent/CN204374359U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106998644A (en) * | 2016-01-22 | 2017-08-01 | 鸿富锦精密电子(郑州)有限公司 | Electrostatic discharge protective circuit and the electronic installation with the electrostatic discharge protective circuit |
| CN106998644B (en) * | 2016-01-22 | 2020-08-07 | 鸿富锦精密电子(郑州)有限公司 | Electrostatic protection circuit and electronic device with same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150603 Termination date: 20200922 |