CN109507555A - A kind of partial discharge test system and test method - Google Patents
A kind of partial discharge test system and test method Download PDFInfo
- Publication number
- CN109507555A CN109507555A CN201811612391.7A CN201811612391A CN109507555A CN 109507555 A CN109507555 A CN 109507555A CN 201811612391 A CN201811612391 A CN 201811612391A CN 109507555 A CN109507555 A CN 109507555A
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- test
- partial discharge
- shelf depreciation
- voltage
- test system
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- 238000012360 testing method Methods 0.000 title claims abstract description 140
- 238000010998 test method Methods 0.000 title abstract description 4
- 239000003990 capacitor Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 5
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims 1
- 240000002853 Nelumbo nucifera Species 0.000 claims 1
- 238000009413 insulation Methods 0.000 description 11
- 230000015556 catabolic process Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
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- 238000003825 pressing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
Abstract
The invention discloses a kind of partial discharge test system and test methods, reduce space interference and power supply disturbance, realize the shelf depreciation test of test product.The system includes the local discharge test screened room for testing the whether qualified power frequency partial discharge test system of test product and for excluding space interference, and the power frequency partial discharge test system is arranged in local discharge test screened room；The power frequency partial discharge test system includes console, pressure regulator, high-tension transformer, coupled capacitor divider and Partial discharge detector.
Description
Technical field
The present invention relates to partial discharge test fields, and in particular to a kind of partial discharge test system and test method.
Background technique
Shelf depreciation refers to the electric discharge phenomena occurred in some region in insulation of electrical installation structure, and this electric discharge is only exhausted
Edge structure is destroyed in the area, and penetrability breakdown does not occur for major insulation, if but shelf depreciation long-term existence, in certain item
The decline and damage of equipment major insulation electrical strength can be caused under part.Higher (the field strength point of internal field if it exists in insulation system
Cloth is uneven) or manufacturing process is not perfect, insulation organic matter decomposes in operation, by mechanical force cracking etc. is occurred for solid insulation
Reason forms defect, these running positions are easy for insulation breakdown occur, shelf depreciation occurs.
Power frequency partial discharge test is a kind of effective ways that can successfully detect tiny flaw in insulation, and examination height
The method of inspection for pressing equipment (insulating part) can run in long-term safety under operating voltage.The base that power frequency shelf depreciation electrically detects
Present principles are to measure high-frequency current pulse caused by shelf depreciation in test product insulation system under certain voltage.
In addition, space is interfered since the ubiquitous of it, randomness and source are difficult to determine in partial discharge test process,
So its influence to partial discharge test is most difficult to exclude, it is frequently due to the presence of space interference, makes us to shelf depreciation
The judgement of waveform is had no way of doing it, and even Partial discharge signal is submerged in interference signal sometimes, can not identify and measure.
Therefore, the partial discharge testing system for how designing a kind of exclusion space interference and the interference of power-supply system, is still wait solve
Certainly the technical issues of.
Summary of the invention
In order to overcome the above-mentioned deficiencies of the prior art, present disclose provides a kind of partial discharge test system and test sides
Method reduces space interference and power supply disturbance, realizes the shelf depreciation test of test product.
Technical solution used by the disclosure is:
A kind of partial discharge test system, the system include for test test product whether He Ge power frequency partial discharge test
System and the local discharge test screened room interfered for excluding space, the power frequency partial discharge test system are arranged in local discharge test
In screened room.
Further, the power frequency partial discharge test system includes console, pressure regulator, high-tension transformer, coupling electricity
Hold divider and Partial discharge detector, in which:
The console is sequentially connected pressure regulator and high-tension transformer, for controlling pressure regulator and high-tension transformer in test product
High-voltage end generate test partial discharge needed for pre- making alive and test voltage；
The both ends of the coupled capacitor divider and the secondary coil of high-tension transformer connect, the coupled capacitor divider
It is also connect with Partial discharge detector, local discharge signal is measured by coupled capacitor divider and is sent to Partial Discharge Detection
Instrument is shown, the shelf depreciation voltage of test product is measured by Partial discharge detector, judges whether test product is qualified.
Further, it is connected between one end of the coupled capacitor divider and secondary coil one end of high-tension transformer
High-voltage and current-limitation resistance.
Further, the coupled capacitor divider includes concatenated first without partial discharge bolcking condenser and detection impedance.
Further, the described concatenated first both ends without partial discharge bolcking condenser and detection impedance are parallel with second without office
Put bolcking condenser.
Further, connect respectively between the pressure regulator and high-tension transformer and between Partial discharge detector and power supply
It is connected to separation filter.
Further, the local discharge test shielding indoor shielding glass unit divisi8 is control room and partial discharge laboratory, the screen
It covers and is provided with the first shield door on glass, electronic secondary shielding door is provided on front side of the local discharge test screened room.
A kind of local discharge measuring method, this method realized based on partial discharge test system as described above, the party
Method the following steps are included:
The shelf depreciation limit value of test item is set；
Apply the test voltage of setting to test item；
The shelf depreciation voltage of measurement test item is sentenced by the shelf depreciation voltage of test item compared with shelf depreciation limit value
Whether disconnected test product is qualified；
When the shelf depreciation voltage of test item is less than shelf depreciation limit value, then test product is qualified, otherwise unqualified.
Through the above technical solutions, the beneficial effect of the disclosure is:
(1) disclosure uses the shelf depreciation limit value that test item is set by Partial discharge detector；Pass through pressure regulator tune
The test voltage for saving pre-add, which reaches, to be required, and applies the test voltage of setting to test item by high-tension transformer；Pass through coupling electricity
The local discharge signal for holding divider measurement test item, judges whether test product is qualified by Partial discharge detector；
(2) disclosure carries out biggish decaying to space interference using screened room, reduces the interference from space；Using
Two separation filters are filtered the power supply of pilot system, reduce the interference of power-supply system.
Detailed description of the invention
The Figure of description for constituting a part of this disclosure is used to provide further understanding of the disclosure, and the disclosure is shown
Meaning property embodiment and its explanation do not constitute the improper restriction to the disclosure for explaining the application.
Fig. 1 is the structure chart of power frequency partial discharge test system；
Fig. 2 is the structure chart of local discharge test screened room.
Specific embodiment
The disclosure is described further with embodiment with reference to the accompanying drawing.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the disclosure.Unless another
It indicates, all technical and scientific terms that the disclosure uses have logical with disclosure person of an ordinary skill in the technical field
The identical meanings understood.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
One or more embodiments provide a kind of partial discharge test system, the system include for excluding voltage disturbance,
Test the whether qualified power frequency partial discharge test system of test product and for excluding space interference, high-voltage mutual inductor and insulating products
The local discharge test screened room of partial discharge test；The power frequency partial discharge test system is arranged in local discharge test screened room.
As shown in Figure 1, the power frequency partial discharge test system includes console 1, pressure regulator 2, high-tension transformer 4, coupling
Close capacitive divider and Partial discharge detector, in which:
The console 1 is sequentially connected pressure regulator 2 and high-tension transformer 4, exists for controlling pressure regulator and high-tension transformer
Pre- making alive and test voltage needed for the high-voltage end of test product generates test partial discharge；The high-tension transformer 4 is used for generation system
High pressure simultaneously can guarantee no partial discharge electricity.
The both ends of the coupled capacitor divider and the secondary coil of high-tension transformer connect, the coupled capacitor divider
It is also connect with Partial discharge detector, local discharge signal is measured by coupled capacitor divider and is sent to Partial Discharge Detection
Instrument is shown, judges that test product is qualified or not by Partial discharge detector.
In the present embodiment, connect between one end of the coupled capacitor divider and secondary coil one end of high-tension transformer
It is connected to high-voltage and current-limitation resistance 5, is protected for high-voltage breakdown, test product breakdown during the test is prevented and damages other equipment.
In the present embodiment, the coupled capacitor divider includes no partial discharge bolcking condenser CXAnd concatenated no partial discharge
Bolcking condenser CKWith detection impedance 6, the no partial discharge bolcking condenser CXWith concatenated no partial discharge bolcking condenser CKAnd detection
Impedance 6 is connected in parallel.
In the present embodiment, the first separation filter 3, the office are connected between the pressure regulator 2 and high-tension transformer 4
Also the second separation filter 8 is connected between portion's discharge detector 8 and power supply, two separation filters are used for the interference of power supply
It is separated with entire test macro, reduces the background interference of entire test macro.
In the present embodiment, the console 1 uses existing GYYT-30 type console, plays control, measurement and protection
Effect has buck/boost, and zero-bit is closed a floodgate, and breakdown, overcurrent protection drop back to zero-bit, high-low limit position is automatic automatically after tripping
The functions such as stopping.
In the present embodiment, the pressure regulator 2 uses TDGZ-20kVA type contact type voltage regulator, setting in the pressure regulator
There is low voltage filter, for filtering out the noise jamming in power supply bandwidth, improves the sensitivity of partial discharge test system, drop
Low ambient noise.
In the present embodiment, the Partial discharge detector uses existing 9101 type instrument for measuring partial discharge of DDX.DDX
9101 type instrument for measuring partial discharge integrate the basic function of all analog probers, meet all in shelf depreciation test
IECIEEE/ANSI standard；And the unwanted Premium Features of user in those complete computerizing shelf depreciation detectors are eliminated,
Only in the size and additional test voltage value of measurement partial discharge quantity.The front panel of 9101 type instrument for measuring partial discharge of DDX
8 control keys are equipped with, when operation, required operational mode (instrument mode or oscillograph mode) is first selected and suitably amplifies
Device setting.
Before starting test, maximum acceptable shelf depreciation value level, i.e. shelf depreciation limit value are set, test item is plus setting
Voltage after, the test product shelf depreciation voltage received compared with shelf depreciation limit value, is judged test product by Partial discharge detector
It is whether qualified, and show the shelf depreciation voltage of test product.
The Partial discharge detector is also connected to the PC machine that separate unit has remote control function, has it and monitors and obtain
Take the function of all data.
Indicator light is provided in Partial discharge detector, it, can be right when indicator light shows that test number has exceeded limitation
Shelf depreciation threshold value is modified；Equipped with the Ethernet interface for communicating with PC machine.
It is not penetrate into workplace to make the electromagnetic field in workplace be not leak into external or external electromagnetic field, it must be
Entire workplace shielding is got up.Therefore, the disclosure provides a kind of local discharge test screen that attenuation can be played to radio frequency electromagnetic energy
Room is covered, power frequency partial discharge test system, test product are placed in full-shield laboratory, so that entire test macro and extraneous letter
Number thoroughly it is isolated with the method for electromagnetic shielding, the journey for being preferably minimized external electromagnetic signal to the influence that partial discharge is tested
Degree.
Fig. 2 is the structural schematic diagram of local discharge test screened room.As described in Figure 2, the local discharge test screened room 9 includes by type
The steel plate of reinforced frame, installation frame top surface and side that steel is constituted and the insulation floor that base of frame is set, it is described
Control room 11 and partial discharge laboratory 10 are divided by shield glass 14 in local discharge test screened room 9, set on the shield glass 14
It is equipped with the first shield door 12, first shield door 12 is mounted on shield glass using beryllium bronze spring lamination plug-in structure；
It is provided with electronic secondary shielding door 13 on front side of the local discharge test screened room, is provided with police above the secondary shielding door 13
Show lamp, the red light at closing time that opens the door is bright；It is provided with door interlock switch on first shield door and secondary shielding door, is boosted in test
Shi Ruo open privately screened room secondary shielding door door or control room the first shield door when, the secondary shielding door door of screened room or
First shield door high voltage power supply of control room will be automatically cut off, to ensure personal safety.
In the present embodiment, it is provided with emergency cut-off button and 2 chargeable formula emergency lights in the screened room, works as test
High pressure can be disconnected when system jam rapidly.
The present embodiment propose local discharge test screened room, guarantee local discharge test system installation after system noise levels≤
1.0pC can reach good shield effectiveness in high frequently 10kHz to tens MHz ranges.
The shelf depreciation that the present embodiment proposes tests sound-absorbing, carries out biggish decaying, drop to space interference using screened room
The low interference from space；The power supply of pilot system is filtered using two separation filters, reduces power-supply system
Interference.
One or more embodiments provide a kind of local discharge measuring method, and this method is based on shelf depreciation as described above
What test macro was realized, method includes the following steps:
The shelf depreciation limit value of test item is arranged in S101.
Before starting test, set that maximum acceptable shelf depreciation value is horizontal by Partial discharge detector, i.e. test item
Shelf depreciation limit value.
S102 applies the test voltage of setting to test item.
It is reached and is required by the test voltage that pressure regulator adjusts pre-add, setting is applied to test item by high-tension transformer
Test voltage.
S103 measures the shelf depreciation voltage of test item, by the shelf depreciation voltage of test item and shelf depreciation limit value phase
Than judging whether test product is qualified.
S104, when the shelf depreciation voltage of test item is less than shelf depreciation limit value, then test product is qualified, otherwise unqualified.
The local discharge measuring method that the present embodiment proposes measures locally put in test product insulation system under certain voltage
Piezoelectric voltage judges that test product HIFI is qualified, avoids space through the shelf depreciation voltage of test product compared with shelf depreciation limit value
Interference and power supply disturbance.
Although above-mentioned be described in conjunction with specific embodiment of the attached drawing to the disclosure, model not is protected to the disclosure
The limitation enclosed, those skilled in the art should understand that, on the basis of the technical solution of the disclosure, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within the protection scope of the disclosure.
Claims (8)
1. a kind of partial discharge test system, which is characterized in that the system include for test test product whether He Ge power frequency office
Portion's discharge test system and the local discharge test screened room interfered for excluding space, the power frequency partial discharge test system setting
In local discharge test screened room.
2. partial discharge test system according to claim 1, which is characterized in that the power frequency partial discharge test system
Including console, pressure regulator, high-tension transformer, coupled capacitor divider and Partial discharge detector, in which:
The console is sequentially connected pressure regulator and high-tension transformer, for controlling pressure regulator and high-tension transformer in the height of test product
Pre- making alive and test voltage needed for pressure side generates test partial discharge；
The secondary coil of the both ends of the coupled capacitor divider and high-tension transformer connects, the coupled capacitor divider also with
Partial discharge detector's connection, passes through that coupled capacitor divider measures local discharge signal and to be sent to Partial discharge detector aobvious
Show, the shelf depreciation voltage of test product is measured by Partial discharge detector, judges whether test product is qualified.
3. partial discharge test system according to claim 1, which is characterized in that one end of the coupled capacitor divider
High-voltage and current-limitation resistance is connected between secondary coil one end of high-tension transformer.
4. partial discharge test system according to claim 1, which is characterized in that the coupled capacitor divider includes string
The first of connection is without partial discharge bolcking condenser and detection impedance.
5. partial discharge test system according to claim 4, which is characterized in that described concatenated first closes without partial discharge lotus root
The both ends of capacitor and detection impedance are parallel with second without partial discharge bolcking condenser.
6. partial discharge test system according to claim 1, which is characterized in that the pressure regulator and high-tension transformer it
Between and Partial discharge detector and power supply between be connected separately with separation filter.
7. partial discharge test system according to claim 1, which is characterized in that the local discharge test shields indoor shielding
Glass unit divisi8 is control room and partial discharge laboratory, and the first shield door, the local discharge test shielding are provided on the shield glass
Electronic secondary shielding door is provided on front side of room.
8. a kind of local discharge measuring method, this method is based on shelf depreciation of any of claims 1-7 test system
What system was realized, which is characterized in that method includes the following steps:
The shelf depreciation limit value of test item is set；
Apply the test voltage of setting to test item；
The shelf depreciation voltage of measurement test item judges to try by the shelf depreciation voltage of test item compared with shelf depreciation limit value
Whether product are qualified；
When the shelf depreciation voltage of test item is less than shelf depreciation limit value, then test product is qualified, otherwise unqualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811612391.7A CN109507555A (en) | 2018-12-27 | 2018-12-27 | A kind of partial discharge test system and test method |
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| CN201811612391.7A CN109507555A (en) | 2018-12-27 | 2018-12-27 | A kind of partial discharge test system and test method |
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Family
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| CN201811612391.7A Pending CN109507555A (en) | 2018-12-27 | 2018-12-27 | A kind of partial discharge test system and test method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110196383A (en) * | 2019-07-05 | 2019-09-03 | 杭州西湖电子研究所 | The method for carrying out ipsilateral high-tension apparatus Partial Discharge Detection using capacitive bottom shielding of bushing |
| CN110531232A (en) * | 2019-09-17 | 2019-12-03 | 广东电网有限责任公司阳江供电局 | A kind of a variety of insulation defect Characteristics of Partial Discharge measuring systems of XLPE cable |
| CN111880059A (en) * | 2020-07-31 | 2020-11-03 | 国网重庆市电力公司电力科学研究院 | Partial discharge test platform and method for high-voltage switch cabinet insulating part |
| CN114034723A (en) * | 2021-11-25 | 2022-02-11 | 华北电力大学 | X-ray-based detection method for micro electric tree defects of XLPE cable |
| CN114217188A (en) * | 2021-12-17 | 2022-03-22 | 江苏锦秀高压电器有限公司 | Power frequency does not have protection device for partial discharge test complete sets |
| CN114414597A (en) * | 2022-01-05 | 2022-04-29 | 华北电力大学 | X-ray-based XLPE cable intermediate joint air gap defect detection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110196383A (en) * | 2019-07-05 | 2019-09-03 | 杭州西湖电子研究所 | The method for carrying out ipsilateral high-tension apparatus Partial Discharge Detection using capacitive bottom shielding of bushing |
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| CN111880059A (en) * | 2020-07-31 | 2020-11-03 | 国网重庆市电力公司电力科学研究院 | Partial discharge test platform and method for high-voltage switch cabinet insulating part |
| CN114034723A (en) * | 2021-11-25 | 2022-02-11 | 华北电力大学 | X-ray-based detection method for micro electric tree defects of XLPE cable |
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| CN114414597A (en) * | 2022-01-05 | 2022-04-29 | 华北电力大学 | X-ray-based XLPE cable intermediate joint air gap defect detection method |
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Address after: 266510 No. 717 West Huaihe Road, Huangdao District, Shandong, Qingdao Applicant after: Qingdao Yihe Electric Group Co., Ltd Address before: 266510 No. 717 West Huaihe Road, Huangdao District, Shandong, Qingdao Applicant before: Yihe Electric Group Co., Ltd. |