CN207380098U - Countermeasure set is removed in a kind of bushing polarization depolarising on-the-spot test - Google Patents
Countermeasure set is removed in a kind of bushing polarization depolarising on-the-spot test Download PDFInfo
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- CN207380098U CN207380098U CN201720724892.9U CN201720724892U CN207380098U CN 207380098 U CN207380098 U CN 207380098U CN 201720724892 U CN201720724892 U CN 201720724892U CN 207380098 U CN207380098 U CN 207380098U
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Abstract
The utility model is related to a kind of polarization depolarising on-the-spot test of bushing to remove countermeasure set, including device body, test casing, shielding disk and ground wire；Described device body and test casing are electrically connected；It is described shielding disk be equipped with it is multiple, be each attached to test casing on；The shielding disk is fixedly connected with ground wire；The device installation operation is simple；The use of the device is not high to testing crew competency profiling；The device has preferable shield effectiveness to the surface current interference generated in on-the-spot test.
Description
Technical field
The utility model is related to high voltage and insulation technology fields, are specially that a kind of bushing polarization depolarising scene is surveyed
Countermeasure set is removed in examination.
Background technology
The casing of high-tension transformer is the key component of transformer.Casing in the process of running, can be subject to high voltage electric field, magnetic
And the running environment such as temperature effect, insulation can deteriorate, and decreasing insulating or even can lose insulation completely and make
With power transformer is caused to break down.According to the customer survey of Doble as a result, casing failure accounts for the transformation more than 100MVA
The 35% of device accident total amount, and shown according to ZTZ investigation：45% Accident of Transformer is caused by being run affairs by set.Therefore, cover
Pipe failure is to cause the one of the major reasons of transformer station high-voltage side bus failure.It is most-often used at the scene to paper oil insulation bushing
Method includes Dielectric Posts, insulation measurement etc., other means of testing such as live shelf depreciation tests, takes casing
The methods of crude oil sample analysis, is for casing and is not easy to live development.The consequence of bushing Frequent Accidents and accident is extremely at present
Badly, therefore accurate evaluation is carried out to bushing state of insulation using novel lossless detection method to be of great significance.For
These problems, recent domestic start using a kind of new test method, that is, the depolarization current method that polarizes (PDC,
Polarization Depolarization Current).The insulation test method is nondestructive and with sensitivity
The advantages of height, test method simple (not high to field test personnel requirement), these characteristics are the Insulation monitoring technology band of casing
Life newly is carried out.
The depolarization current method that polarizes is a kind of new method based on dielectric response technology.It is detected with polarization depolarization current method
Casing insulation ag(e)ing is mainly polarized by adding high pressure in the insulation system to casing, when polarization certain time is laggard
Row electric discharge (process of depolarization), the current data for gathering this process carry out carrying out algorithm variation, fitting etc. using mathematical software, most
The Insulation Problems of casing and the whole degree of aging of insulation are differentiated by certain discrimination standard afterwards.The difficulty of this test method maximum
Point is to detect that electric current is very small or even only several pico-amperes, therefore the interference of very little may all cause the measurement of pico-ampere table
Large error, since when pressurizeing during polarization depolarising method test to sample electric current can be generated in sleeve surface, if not inventing conjunction
Suitable device handles it, then the result for the depolarising test that polarizes can be affected to some extent.It is therefore desirable to invent one
Effective and rational device is planted, the surface current of test voltage generation can be masked so as to remove it to measurement result
Interference.
Utility model content
The purpose of this utility model is to provide a kind of polarization depolarising on-the-spot test of bushing to remove countermeasure set, its energy
Effectively solve the problems, such as present in background technology.
To achieve the above object, the utility model provides following technical solution：A kind of bushing polarization depolarising scene
Countermeasure set is removed in test, including device body, test casing, shielding disk and ground wire；Described device body and test casing electricity
Property connection；It is described shielding disk be equipped with it is multiple, be each attached to test casing on；The shielding disk is fixedly connected with ground wire；
Described device body includes pico-ampere table, resistance, relay, high-voltage DC power supply and industrial personal computer；The high voltage direct current
Power supply, relay, resistance, test casing, pico-ampere table and high-voltage DC power supply electrical series successively.The industrial personal computer wireless connection
Relay and pico-ampere table.
Further, the relay ground connection.
Further, the resistance is current-limiting resistance.
Further, the relay is vacuum high-pressure relay.
Compared with prior art, the beneficial effects of the utility model are：
1st, the device installation operation is simple；
2nd, the use of the device is not high to testing crew competency profiling；
3rd, the device has preferable shield effectiveness to the surface current interference generated in on-the-spot test.
Description of the drawings
Fig. 1 is the schematic diagram that addition goes casing polarization depolarization current during countermeasure set to test；
Fig. 2 is the top view of shielding disk；
Fig. 3 is the front view of shielding disk；
In reference numeral：1. device body；11. pico-ampere table；12. resistance；13. relay；14. high-voltage DC power supply；15.
Industrial personal computer；2. test casing；3. shield disk；4. ground wire.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
The all other embodiment obtained, shall fall within the protection scope of the present invention.
- 3 are please referred to Fig.1, the utility model provides a kind of technical solution：A kind of bushing polarization depolarising on-the-spot test
Countermeasure set is removed, including device body 1, test casing 2, shielding disk 3 and ground wire 4；Described device body 1 and test casing 2
It is electrically connected；It is described shielding disk 3 be equipped with it is multiple, be each attached to test casing 2 on；The shielding disk 3 and ground wire 4, which are fixed, to be connected
It connects；
Described device body 1 includes pico-ampere table 11, resistance 12, relay 13, high-voltage DC power supply 14 and industrial personal computer 15；Institute
High-voltage DC power supply 14, relay 13, resistance 12, test casing 2, pico-ampere table 11 and high-voltage DC power supply 14 is stated electrically to go here and there successively
Connection.The 15 wireless connection relay 13 of industrial personal computer and pico-ampere table 11.
Further, the relay 13 is grounded.
Further, the resistance 12 is current-limiting resistance.
Further, the relay 13 is vacuum high-pressure relay.
When the utility model at work：Before PDC tests are carried out, in the upper insulator center section installation of test casing 2
Disk 3 is shielded, ground wire 4 is directly then connected access greatly with shielding disk 3.Then start industrial personal computer 15, utilize pico-ampere table
11 are tested；The propagation that continues for so avoiding surface current generates interference to the pico-ampere table in PDC test devices.
While there has been shown and described that the embodiment of the utility model, for the ordinary skill in the art,
It is appreciated that in the case where not departing from the principle of the utility model and spirit can these embodiments be carried out with a variety of variations, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (4)
1. countermeasure set is removed in a kind of bushing polarization depolarising on-the-spot test, it is characterised in that：Including device body（1）, survey
Try casing（2）, shielding disk（3）And ground wire（4）；Described device body（1）With test casing（2）It is electrically connected；The shielding
Disk（3）Equipped with multiple, test casing is each attached to（2）On；The shielding disk（3）And ground wire（4）It is fixedly connected；
Described device body（1）Including pico-ampere table（11）, resistance（12）, relay（13）, high-voltage DC power supply（14）And industry control
Machine（15）；The high-voltage DC power supply（14）, relay（13）, resistance（12）, test casing（2）, pico-ampere table（11）And high pressure
DC power supply（14）Electrical series successively, the industrial personal computer（15）Wireless connection relay（13）With pico-ampere table（11）.
2. countermeasure set is removed in a kind of bushing polarization depolarising on-the-spot test according to claim 1, it is characterised in that：
The relay（13）Ground connection.
3. countermeasure set is removed in a kind of bushing polarization depolarising on-the-spot test according to claim 1, it is characterised in that：
The resistance（12）For current-limiting resistance.
4. countermeasure set is removed in a kind of bushing polarization depolarising on-the-spot test according to claim 1, it is characterised in that：
The relay（13）For vacuum high-pressure relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720724892.9U CN207380098U (en) | 2017-06-21 | 2017-06-21 | Countermeasure set is removed in a kind of bushing polarization depolarising on-the-spot test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720724892.9U CN207380098U (en) | 2017-06-21 | 2017-06-21 | Countermeasure set is removed in a kind of bushing polarization depolarising on-the-spot test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207380098U true CN207380098U (en) | 2018-05-18 |
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ID=62298895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720724892.9U Active CN207380098U (en) | 2017-06-21 | 2017-06-21 | Countermeasure set is removed in a kind of bushing polarization depolarising on-the-spot test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207380098U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361576A (en) * | 2019-06-28 | 2019-10-22 | 南方电网调峰调频发电有限公司检修试验分公司 | A kind of generator unit stator winding polarization depolarising test macro and test method |
-
2017
- 2017-06-21 CN CN201720724892.9U patent/CN207380098U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361576A (en) * | 2019-06-28 | 2019-10-22 | 南方电网调峰调频发电有限公司检修试验分公司 | A kind of generator unit stator winding polarization depolarising test macro and test method |
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