CN203490330U - Partial discharge coupling and noise-eliminating sensor of capacitor - Google Patents
Partial discharge coupling and noise-eliminating sensor of capacitor Download PDFInfo
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- CN203490330U CN203490330U CN201320559455.8U CN201320559455U CN203490330U CN 203490330 U CN203490330 U CN 203490330U CN 201320559455 U CN201320559455 U CN 201320559455U CN 203490330 U CN203490330 U CN 203490330U
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- connection terminal
- noising
- sensor
- magnetic core
- electric capacity
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Abstract
The utility model relates to a partial discharge coupling and noise-eliminating sensor of a capacitor, which comprises two balancing windings; the two balancing windings are wound on a magnetic core symmetrically and crossly; one ends of the two balancing windings are respectively connected to a wiring terminal a and a wiring terminal b; the other ends of the two balancing windings are connected with a wiring terminal c together; a detection winding is wound in the middle of the magnetic core; and an output terminal is connected above the magnetic core. By adopting the technical scheme, a special coupling and noise-eliminating circuit is adopted in the utility model; the principle that magnetic fluxes are offset when the polarities of the windings are opposite is utilized; by means of the coupling circuit, space interference signals and line interference signals can be eliminated; the final output signals are partial discharge signals in the capacitor, and therefore, the insulation level of a power capacitor can be monitored accurately in real time.
Description
Technical field
The utility model relates to a kind of electric capacity general ability and puts coupling de-noising sensor.
Background technology
At present in power capacitor partial discharge monitoring, pulse current method is because of the high reject signal impact on space and circuit, cause system cannot correctly identify fainter discharge signal, adopt the methods such as conventional filtering, mixing can not effectively remove undesired signal, therefore can only adopt the method for ultrasonic monitoring, but the ultrasonic method linearity is poor, can not accurately reflect the variation tendency of the electric discharge value of capacitor internal.
Summary of the invention
The purpose of this utility model is to provide a kind of undesired signal that can eliminate on space and circuit, prepares the partial discharge of capacitor coupling de-noising circuit of the dielectric level of detection power capacitor.
The purpose of this utility model is achieved in that electric capacity general ability puts coupling de-noising sensor and comprise two balance windings, two balance winding symmetrical chiasmas are arranged and are wound on magnetic core, one end of two balance windings meets respectively connection terminal a and connection terminal b, the other end is connected with connection terminal c jointly, detect winding around magnetic core middle part, above connect lead-out terminal.
Owing to carrying out technique scheme, the utility model adopts a kind of special coupling de-noising circuit, the principle of having utilized the contrary magnetic flux of winding polarity to offset.By this coupled circuit, can eliminate the undesired signal on space and circuit, the local discharge signal that the final signal of its output is capacitor internal, thereby the dielectric level of Real-Time Monitoring power capacitor exactly.
Accompanying drawing explanation: the technical solution of the utility model is provided by following drawings and Examples:
Fig. 1 is that electric capacity general ability is put coupling de-noising sensor construction schematic diagram;
Fig. 2 is that electric capacity general ability is put coupling de-noising sensor circuit figure.
Legend: 1, screening can, 2, balance winding, 3, impedance shell, 4, connection terminal a, 5, connection terminal b, 6, lead-out terminal, 7, detect winding, 8, magnetic core, 9, connection terminal c.
Embodiment:
The utility model is not subject to the restriction of following embodiment, can determine concrete embodiment according to the technical solution of the utility model and actual conditions.
Embodiment: as shown in Figure 1, electric capacity general ability is put coupling de-noising sensor and comprised that 2, the two balance winding 2 symmetrical chiasmas arrangements of two balance windings are wound on magnetic core 8.One end of two balance windings 2 meets respectively connection terminal a4 and connection terminal b5, and the other end is connected with connection terminal c9 jointly.Detect winding 7 around magnetic core middle part, above connect lead-out terminal 6.Magnetic core 8 is placed in screening can 1, with poured with epoxy resin, fixes, and meets connection terminal a4, connection terminal b5 and connection terminal c9 and splits screening can 1 both sides, and outer end exposure is outside screening can 1.At screening can 1 overcoat, there is impedance shell 3.
As shown in Figure 2, electric capacity general ability is put coupling de-noising sensor circuit and is comprised two balance winding 2(N1, N2), detect winding 7(N3), detect winding 7 two ends and be connected to output impedance build-out resistor R, and form signal output terminal 6(BNC), external shelf depreciation harvester.The connection terminal a4 of two balance windings 2, connection terminal b5 access respectively power capacitor C1 to be measured, C2, and the other end is connected to form connection terminal c9, and ground connection.
The undesired signal of importing into from two power capacitor C1 to be measured, C2 outsides is basic identical, and therefore after opposite polarity N1 and two balance windings 2 of N2, magnetic flux is offset, and cannot sense that N3 detects on winding 7; And can sense that by the inner local discharge signal producing of power capacitor C1 to be measured, C2 N3 detects on winding 7, and output to shelf depreciation harvester by lead-out terminal 6, thereby realized, remove the function that undesired signal retains the inner local discharge signal of power capacitor to be measured.
Above technical characterictic has formed most preferred embodiment of the present utility model, and it has stronger adaptability and best implementation result, can increase and decrease according to actual needs inessential technical characterictic, meets the needs of different situations.
Claims (4)
1. an electric capacity general ability is put coupling de-noising sensor, it is characterized in that: it comprises two balance windings, two balance winding symmetrical chiasmas are arranged and are wound on magnetic core, one end of two balance windings meets respectively connection terminal a and connection terminal b, the other end is connected with connection terminal c jointly, detect winding around magnetic core middle part, above connect lead-out terminal.
2. electric capacity general ability as claimed in claim 1 is put coupling de-noising sensor, it is characterized in that: magnetic core is placed in screening can, with poured with epoxy resin, fixes, and at screening can overcoat, has impedance shell.
3. electric capacity general ability as claimed in claim 1 is put coupling de-noising sensor, it is characterized in that: meet connection terminal a, connection terminal b and connection terminal c and split screening can both sides, outer end exposure is outside screening can.
4. electric capacity general ability as claimed in claim 1 is put coupling de-noising sensor, it is characterized in that: electric capacity general ability is put coupling de-noising sensor circuit and comprised two balance windings (N1, N2), detect winding (N3), detect winding two ends and be connected to output impedance build-out resistor R, and form signal output terminal (BNC), and external shelf depreciation harvester, the connection terminal a of two balance windings, connection terminal b access respectively power capacitor C1 to be measured, C2, the other end is connected to form connection terminal c, and ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320559455.8U CN203490330U (en) | 2013-09-10 | 2013-09-10 | Partial discharge coupling and noise-eliminating sensor of capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320559455.8U CN203490330U (en) | 2013-09-10 | 2013-09-10 | Partial discharge coupling and noise-eliminating sensor of capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203490330U true CN203490330U (en) | 2014-03-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320559455.8U Expired - Fee Related CN203490330U (en) | 2013-09-10 | 2013-09-10 | Partial discharge coupling and noise-eliminating sensor of capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203490330U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529363A (en) * | 2013-09-10 | 2014-01-22 | 国家电网公司 | Capacitor partial discharge coupling and denoising sensor |
| US10302710B2 (en) | 2014-09-26 | 2019-05-28 | Bourns, Inc. | System and method for active balancing/cancellation of magnetic interference in a magnetic sensor |
-
2013
- 2013-09-10 CN CN201320559455.8U patent/CN203490330U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529363A (en) * | 2013-09-10 | 2014-01-22 | 国家电网公司 | Capacitor partial discharge coupling and denoising sensor |
| US10302710B2 (en) | 2014-09-26 | 2019-05-28 | Bourns, Inc. | System and method for active balancing/cancellation of magnetic interference in a magnetic sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20140319 |