CN202443099U - Instrument for measuring local discharge of cable - Google Patents
Instrument for measuring local discharge of cable Download PDFInfo
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- CN202443099U CN202443099U CN2012200354182U CN201220035418U CN202443099U CN 202443099 U CN202443099 U CN 202443099U CN 2012200354182 U CN2012200354182 U CN 2012200354182U CN 201220035418 U CN201220035418 U CN 201220035418U CN 202443099 U CN202443099 U CN 202443099U
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Abstract
The utility model discloses an instrument for measuring local discharge of a cable. The instrument consists of a signal induction coil, an ordinary signal wire, a front-end processor, an optical fiber, a converter, a USB (Universal Serial Bus) connecting wire and an external notebook computer 7. Through the instrument for measuring local discharge, a local discharge signal can be judged more effectively, and the insulation effect of electric equipment is detected finally by judging local discharge to prevent equipment failures caused by insulation defects or insulation aging of the equipment.
Description
Technical field
The utility model relates to a kind of measurement mechanism, particularly relates to a kind of surveying instrument of cable local discharge.
Background technology
The IEC60270 standard to the definition of partial discharge phenomenon is: under high voltage in solid or the liquid insulating medium only by the electrical discharge of part bridge joint.Detection and supervision to shelf depreciation are very important, because the partial discharge phenomenon omen of high voltage installation insulation breakdown normally, in case insulation breakdown, with causing huge power failure and maintenance loss.
In field of power; The operations staff of power equipment manufacturer and electric power operation enterprise is always for improving the quality control process unremitting effort of self, in order to the assets of protecting its most worthy like generator, motor, transformer, GIS and cable system etc.Use appropriate methods and means that shelf depreciation is carried out correct detection and assessed an important composition part that has become whole quality control process.
The difficult point of Analysis of Partial Discharge is (Pi Ku) the interior very small discharge of scope of detection and Identification
; And test voltage possibly lie prostrate up to hundreds of thousands; And often there is a serious external interfering noise; They come from the corona that adjacent high-tension apparatus sends, or other radio interference.
Noise seems that sometimes with real shelf depreciation be very similar.And along with being widely used of power electric component, even these interference noises preferably also can ubiquity in the factory at test environment.Traditional shelf depreciation means of identification is to use amplitude/phase diagram to discern different partial discharges fault.Usually make and need rich experience and accumulation of knowledge in this way.And when having external noise and having a plurality of Partial Discharge Sources to exist simultaneously, make and discern the different Partial Discharge Sources very difficulty that will become in this way.Particularly when the test electric rotating machine; Local discharge signal can be coupled on the adjacent winding mutually through capacitive and inductive cross-talk; If at this moment use traditional amplitude/phase diagram method can obtain the compound collection of illustrative plates that aliasing has noise, discharge signal and crosstalk signal, this is very disadvantageous for the electric discharge type that identification belongs to independent power supply.
Existing measurement mechanism to local discharge signal; Mostly can be to noise and the non-completely typing of signal that this discharges and is brought; Just brought a very big judgement difficult problem thus to the technician; Whether there is shelf depreciation for electrical equipment, is difficult to the criterion of a very clear and definite standard as shelf depreciation.
The utility model content
The utility model provides a kind of surveying instrument of cable local discharge in order to overcome the deficiency of prior art.This device is through effectively shielding cable local discharge signal and noise, for the measurement judgement that increases substantially shelf depreciation provides an effective survey instrument.
The technical scheme that the utility model solves the problems of the technologies described above is:
A kind of surveying instrument of cable local discharge is made up of three induction of signal coils, normal signal line, front end processor, optical fiber, interpreter, USB connecting line and external notebook computer; Front end processor is provided with port I, port II; Interpreter is provided with port I, port II; External notebook computer is provided with the port I; The induction of signal coil is connected with the port I of front end processor through the normal signal line, and the port II of front end processor is connected with the port I of interpreter through optical fiber, and the port II of interpreter is connected with the port I of external notebook computer through the USB connecting line.
When once testing together; Utilize three induction of signal coils that all discharge signals are all measured; Passing to front end processor through the normal signal line, through the pre-service of front end processor, is the electrical signal conversion of input light signal; Get back to interpreter to the discharge signal transmission through optical fiber; External notebook computer is connected with interpreter through the USB connecting line, judges its character through the concrete zone that projects to discharge signal in the three-dimensional theorem in Euclid space, if in the appointed area then be discharge signal; Otherwise just be judged to be other interference of noise or non-discharge signal, be presented at the information of shelf depreciation on the display screen of notebook computer through software setting at last.
The beneficial effect of the utility model is: through so a kind of measurement of partial discharge instrument; Can more effectively judge local discharge signal; Final through judgement to shelf depreciation; Insulation quality to electrical equipment detects, the equipment failure that brings because of apparatus insulated defective or insulation ag(e)ing to prevent.
In the utility model, the induction of signal coil is mainly used in the collecting work to local discharge signal; The normal signal line is mainly used in the data transfer of induction of signal coil to front end processor; Front end processor is mainly used in and is converted into the transmission that light signal is beneficial to optical fiber to electric signal; Optical fiber is mainly used in and is delivered to light signal in the interpreter, plays the effect of insulation shielding, reduces the interference of noise to test result to greatest extent; The signal that interpreter is mainly used in transmitting carries out Treatment Analysis, project to discharge signal in the three dimensional euclidean space, with and dock through USB interface and external notebook computer; The USB connecting line is mainly used in being connected of interpreter and external notebook computer; External notebook computer is mainly used in the processing to late time data, and through installed software therein interpreter is controlled.
Description of drawings
Fig. 1 is the surveying instrument structural representation of a kind of cable local discharge of the utility model.
Among the figure: three induction of signal coils 1, normal signal line 2, front end processor 3, optical fiber 4, interpreter 5, USB connecting line 6, external notebook computer 7.
Embodiment
Below, the utility model is described further in conjunction with accompanying drawing through embodiment.
The surveying instrument structure of a kind of cable local discharge of the utility model is as shown in Figure 1, among the figure: three induction of signal coils 1, normal signal line 2, front end processor 3, optical fiber 4, interpreter 5, USB connecting line 6, external notebook computer 7.Front end processor 3 is provided with port I, port II.Interpreter 5 is provided with port I, port II.External notebook computer 7 is provided with the port I.Three induction of signal coils 1 are connected with the I port of front end processor 3 through normal signal line 2; The II port of front end processor 3 is connected with the I port of interpreter 5 through optical fiber 4, and the II port of interpreter 5 is connected with external notebook computer 7 port I through USB connecting line 6.
When once testing together, measure through three induction of signal coils 1 respectively; After induction of signal coil 1 is obtained local discharge signal; Pass to local discharge signal simultaneously the I port of front end processor 3 through normal signal line 2; Front end processor 3 just converts local discharge signal into light signal simply, to come transmitting signal through the light media.When signal transmits through optical fiber 4, can guarantee to greatest extent that it is undistorted, and also shield other interference measuring the influence that is caused.The II port of front end processor 3 is connected with the I port of interpreter 5 through optical fiber 4.The II port of interpreter 5 is connected with external notebook computer 7 through USB connecting line 6.Decompose gathering the signal that comes with interpreter software and algorithm through being installed in external notebook computer 7, and project in the three dimensional euclidean space coordinate, and come local discharge signal is differentiated differentiation with this.In external notebook computer 7, can the analysis result of shelf depreciation be shown and contrast, and realize control interpreter through being provided with of related software.
Although the utility model is described; But foregoing description just for illustrative purposes; The utility model is not limited to the above-mentioned specific descriptions that combine accompanying drawing; Those of ordinary skills have the ability that it is not broken away from the various changes of the utility model spirit, and the protection domain of the utility model is defined by the claims.
Claims (1)
1. the surveying instrument of a cable local discharge is characterized in that, it is made up of three induction of signal coils, normal signal line, front end processor, optical fiber, interpreter, USB connecting line and external notebook computer; Front end processor is provided with port I, port II; Interpreter is provided with port I, port II; External notebook computer is provided with the port I; The induction of signal coil is connected with the port I of front end processor through the normal signal line, and the port II of front end processor is connected with the port I of interpreter through optical fiber, and the port II of interpreter is connected with the port I of external notebook computer through the USB connecting line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200354182U CN202443099U (en) | 2012-02-06 | 2012-02-06 | Instrument for measuring local discharge of cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200354182U CN202443099U (en) | 2012-02-06 | 2012-02-06 | Instrument for measuring local discharge of cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202443099U true CN202443099U (en) | 2012-09-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200354182U Expired - Fee Related CN202443099U (en) | 2012-02-06 | 2012-02-06 | Instrument for measuring local discharge of cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202443099U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197216A (en) * | 2013-04-12 | 2013-07-10 | 华北电力大学（保定） | Cable joint partial discharge monitoring system based on optical fiber transmission |
| CN104468555A (en) * | 2014-12-02 | 2015-03-25 | 国家电网公司 | Data conversion setting method of partial discharge online monitoring device |
-
2012
- 2012-02-06 CN CN2012200354182U patent/CN202443099U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197216A (en) * | 2013-04-12 | 2013-07-10 | 华北电力大学（保定） | Cable joint partial discharge monitoring system based on optical fiber transmission |
| CN104468555A (en) * | 2014-12-02 | 2015-03-25 | 国家电网公司 | Data conversion setting method of partial discharge online monitoring device |
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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 |
Granted publication date: 20120919 Termination date: 20150206 |
|
| EXPY | Termination of patent right or utility model |