CN102540032A - Live testing window for partial discharge of transformer - Google Patents
Live testing window for partial discharge of transformer Download PDFInfo
- Publication number
- CN102540032A CN102540032A CN2012100307167A CN201210030716A CN102540032A CN 102540032 A CN102540032 A CN 102540032A CN 2012100307167 A CN2012100307167 A CN 2012100307167A CN 201210030716 A CN201210030716 A CN 201210030716A CN 102540032 A CN102540032 A CN 102540032A
- Authority
- CN
- China
- Prior art keywords
- transformer
- partial discharge
- testing window
- testing
- live testing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a live testing window for partial discharge of a transformer. The live testing window is arranged at the top of an oil tank or on a hand hole cover plate on the side wall of the oil tank and comprises a testing window, at least one pair of fixed flanges, an insulating plate and at least one pair of sealing pressing plates, wherein a testing hole is formed in the hand hole cover plate; each pair of fixed flanges is fixed on the outer wall of the hand hole cover plate and distributed at the periphery of the testing hole; the insulating plate and each pair of sealing pressing plate are sequentially arranged outside the testing hole; the sealing pressing plates are pressed against the upper and lower parts of the insulating plate; the sealing pressing plates and the fixed flanges are fixed through fixing pieces; and an ultrahigh frequency sensor is arranged between the pair of sealing pressing plates. The live testing window for the partial discharge of the transformer has the advantages that: the defects of the prior art can be overcome; an internal structure of the transformer is not required to be changed; under the condition that the transformer safely operates, the partial discharge of the transformer is subjected to live testing; and the defects of a built-in sensor at a position of an oil drain valve are overcome.
Description
Technical field
The present invention relates to a kind of transformer, refer in particular to a kind of testing window that can realize the local live testing of transformer.
Background technology
Power transformer is as the nucleus equipment of electric system, and its reliability directly influences the safety and stablization operation of electric system.Through the failure condition statistics is shown, insulation fault is to influence the normal principal element of moving of transformer, and shelf depreciation is to cause the main cause of transformer insulated deterioration, and simultaneously, shelf depreciation also is the important sign and the form of expression of insulation degradation.Along with the requirement to power supply reliability becomes increasingly conspicuous,, realize grasping transformer insulated situation under the charging operation state through transformer is effectively monitored its shelf depreciation.
Test to shelf depreciation all is that the various phenomenons that produced with discharge are foundation, characterizes the state of shelf depreciation through the physical quantity that can explain this phenomenon.Conventional test methods comprises: various test such as electric pulse method of testing, ultrasonic investigation method, oil chromatography method of testing and ultrahigh frequency measuring technology.Pulse current method is low because of its test frequency, shortcomings such as frequency band is narrow, poor anti jamming capability, when often only being used for transformer and dispatching from the factory or the test of the shelf depreciation under off-line state, can't be effective to the transformer part and put live testing.Because the inner winding construction of transformer is complicated; Various acoustic mediums reach inconsistent to the influence of the velocity of sound to the decay of sound wave; Cause the anti-electromagnetic interference capability of supercritical ultrasonics technology test shelf depreciation relatively poor; Sensitivity is lower, is mainly used in the auxiliary electrical impulse method at present Partial Discharge Sources is carried out physical positioning, is used for the partial discharge of transformer on-line testing hardly separately.The transformer oil chromatographic analytic approach is through the composition and the concentration of gas in the test oil; Judge the type and the order of severity of shelf depreciation; The shortcoming of this kind method of testing is that the oil chromatography analysis can only the indirect reaction discharge scenario; Thereby, but fault that can not consersion unit burst sensitive to finding early stage latency fault.The uhf electromagnetic wave that the ultrahigh frequency measuring technology is excited through the inner shelf depreciation of receiving transformer; Realize the test and the location of shelf depreciation; Advantages such as it has the survey frequency height, test frequency range is wide and frequency band is adjustable, strong interference immunity, sensitivity height can effective application be moved in the on-the-spot complex electromagnetic environments in transformer.
At present, when adopting the ultrahigh frequency method to carry out the partial discharge of transformer live testing, the mounting means of uhf sensor has external and built-in two kinds.At a transformer manhole and a sleeve pipe rising seat position, measure the electromagnetic wave that comes out from this O-ring seal diffraction, through the external sensor to judge inner shelf depreciation situation.Test and on-the-spot test show that because the shielding action of transformer case, the electromagnetic wave energy that comes out from the O-ring seal diffraction is very little, and under the transformer running status, complicated electromagnetic interference environment causes this method of testing sensitivity very low.Transformer is carried out built-in uhf sensor, utilize the fuel tank shielding action of electromagnetic interference (EMI) to external world, can effectively improve the sensitivity of transformer internal discharge test.Being employed in Accident of Transformer fuel outlet valve position is present general shelf depreciation live testing method to its built-in uhf sensor.When transformer is carried out built-in uhf sensor; Need open fuel outlet valve can built-inly pop one's head in after getting rid of the air in the fuel outlet valve connecting pipe; This process very easily causes the insufficient air that causes of exhaust to get in the transformer body; Even cause the fault of the light gas alarming of main-transformer to take place, to having relatively high expectations of tester, difficulty is promoted the use of.Simultaneously, to adopting the transformer of butterfly fuel outlet valve, uhf sensor need adopt the centering type structure, and this structural design causes inserting the intrinsic uhf sensor internal diameter of transformer less than 8cm, has a strong impact on the sensitivity of main-transformer shelf depreciation test.
Summary of the invention
The purpose of this invention is to provide a kind of partial discharge of transformer live testing window; It can overcome the deficiency of prior art; Need not change the inner structure of transformer; Realized guaranteeing that transformer under the safe operation state, carries out the shelf depreciation live testing to it, and overcome deficiency at fuel outlet valve position built-in sensors.
The present invention is achieved in that
A kind of partial discharge of transformer live testing window; It is located on the hand hole cover plate of top or sidewall of fuel tank; It also includes instrument connection, at least one pair of mounting flange, insulcrete and at least one pair of sealing clamp; Said testing window is opened on the said hand hole cover plate; Said mounting flange all is fixed in the outer wall of said hand hole cover plate and is distributed in the periphery of said instrument connection respectively, said insulcrete and said sealing clamp is installed on the outside of said instrument connection successively, and said sealing clamp is pressed on the upper and lower of said insulcrete respectively; Said sealing clamp and said mounting flange are fixed through fixture, and uhf sensor is installed on said between the sealing clamp.
Preferably, the area of said insulcrete is greater than the area of said mounting hole.
Preferably, be provided with O-ring seal between said insulcrete and the said mounting flange.
Preferably, it also includes protective cover, and said protective cover is fixed through fixture and said mounting flange.
Preferably, the perisporium of said protective cover is provided with wire hole.
Preferably, said insulcrete is a polyfluortetraethylene plate.
Partial discharge of transformer live testing window of the present invention compared with prior art has following beneficial effect:
The present invention under the prerequisite that does not change transformer inner structure and sealing effectiveness, can pass through uhf sensor through on the fuel tank of transformer, testing window being set under the state of transformer operation, to charged test of transformer inside shelf depreciation.The present invention has not only overcome the not high problem of external uhf sensor method of testing sensitivity; And light gas malfunction and valve mechanism size and the unmatched problem of uhf sensor of having avoided built-in uhf sensor method of testing to bring; Simultaneously, improved the sensitivity of partial discharge of transformer live testing method again.
Description of drawings
Fig. 1 is the structural scheme of mechanism of partial discharge of transformer live testing window of the present invention;
Fig. 2 is the cooperate synoptic diagram of partial discharge of transformer live testing window of the present invention with uhf sensor.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated:
Like Fig. 1 and shown in Figure 2, partial discharge of transformer live testing window of the present invention, it is located on the hand hole cover plate 2 of top or sidewall of fuel tank 1, offers instrument connection 3 on the said hand hole cover plate 2, and uhf sensor 10 is installed in said instrument connection 3 places.The present invention can be provided with different testing windows according to the type difference of transformer; Usually, for the 110kV transformer, can on the hand hole cover plate at its fuel tank top, add testing window; And, can on its two sides of fuel tank hand hole cover plate, add testing window simultaneously for 220kV and above high-power transformer.
For the ease of said uhf sensor 10 being installed on the said hand hole cover plate 2 of said fuel tank 1; The present invention also includes mounting flange 4, insulcrete 5 and sealing clamp 6; Said mounting flange 4 is fixed on the outer wall of said hand hole cover plate 2 and is distributed in the periphery of said instrument connection 3 respectively; Said insulcrete 5 and the said outside that sealing clamp 6 is installed on successively said instrument connection 3; And said sealing clamp 6 is pressed on the upper and lower of said insulcrete 5 respectively, and said sealing clamp 6 is fixing through fixture 7 with said mounting flange 4, and said sealing clamp 6 can be sealed said instrument connection 3; Said uhf sensor 10 is installed on said between the sealing clamp 6, and said uhf sensor 10 is fixed through fixture 8 and said mounting flange 4.Wherein, the material of said sealing clamp 6 is preferably stainless steel.
In order to make said insulcrete 2 can better seal said fuel tank 1, the area of said insulcrete 5 is greater than the area of said instrument connection 3, and is provided with O-ring seal 9 between said insulcrete 5 and the said mounting flange 4, avoids the oil in the fuel tank to ooze out.The material of said insulcrete 5 preferably adopt have corrosion-resistant, high temperature resistant, physical strength is good, material good insulation preformance is processed, this preferred embodiment adopts polyfluortetraethylene plate.
The present invention also includes protective cover 11, and said protective cover 11 is fixed through fixture 12 and said mounting flange 4, and the perisporium of said protective cover 11 is provided with wire hole 13.After said uhf sensor 10 is installed on the said fuel tank 1, said protective cover 11 is fixed, and signal cable is exposed from said wire hole 13.
In the present invention, said fixture 7,8,12 all is preferably screw.
More than be merely specific embodiment of the present invention, do not limit protection scope of the present invention with this; Any replacement and the improvement on the basis of not violating the present invention's design, done all belong to protection scope of the present invention.
Claims (6)
1. partial discharge of transformer live testing window; It is located on the hand hole cover plate of top or sidewall of fuel tank; It is characterized in that it also includes instrument connection, at least one pair of mounting flange, insulcrete and at least one pair of sealing clamp, said testing window is opened on the said hand hole cover plate; Said mounting flange all is fixed in the outer wall of said hand hole cover plate and is distributed in the periphery of said instrument connection respectively; Said insulcrete and said sealing clamp is installed on the outside of said instrument connection successively, said sealing clamp and said mounting flange are fixed through fixture, and uhf sensor is installed on said between the sealing clamp.
2. partial discharge of transformer live testing window as claimed in claim 1 is characterized in that the area of said insulcrete is greater than the area of said mounting hole.
3. partial discharge of transformer live testing window as claimed in claim 1 is characterized in that, is provided with O-ring seal between said insulcrete and the said mounting flange.
4. partial discharge of transformer live testing window as claimed in claim 1 is characterized in that it also includes protective cover, and said protective cover is fixed through fixture and said mounting flange.
5. partial discharge of transformer live testing window as claimed in claim 4 is characterized in that the perisporium of said protective cover is provided with wire hole.
6. partial discharge of transformer live testing window as claimed in claim 1 is characterized in that said insulcrete is a polyfluortetraethylene plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100307167A CN102540032A (en) | 2012-02-13 | 2012-02-13 | Live testing window for partial discharge of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100307167A CN102540032A (en) | 2012-02-13 | 2012-02-13 | Live testing window for partial discharge of transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102540032A true CN102540032A (en) | 2012-07-04 |
Family
ID=46347395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100307167A Pending CN102540032A (en) | 2012-02-13 | 2012-02-13 | Live testing window for partial discharge of transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102540032A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510775A (en) * | 2015-11-27 | 2016-04-20 | 广东电网有限责任公司电力科学研究院 | Installation method of ultrahigh-frequency sensor |
| CN105842589A (en) * | 2016-03-21 | 2016-08-10 | 上海申色电气有限公司 | Device, system and method for detecting GIS local discharge |
| CN106249113A (en) * | 2016-08-18 | 2016-12-21 | 张春辉 | A kind of method to set up of equivalence transducer |
| CN107589356A (en) * | 2017-10-19 | 2018-01-16 | 桂林师范高等专科学校 | Transformer insulated property detection means |
| CN113866624A (en) * | 2021-09-27 | 2021-12-31 | 广东电网有限责任公司 | GIS partial discharge live-line testing device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1821796A (en) * | 2006-03-28 | 2006-08-23 | 华北电力大学（北京） | Window type online monitor for detecting gas insulation combined electric appliance (GIS) |
| JP2009080057A (en) * | 2007-09-27 | 2009-04-16 | Mitsubishi Electric Corp | Partial discharge source discrimination device of oil-immersed transformer |
| CN201562521U (en) * | 2009-11-03 | 2010-08-25 | 保定天威集团有限公司 | Bushing lifting pedestal hand hole structure of high-voltage transformer |
| CN201654077U (en) * | 2010-05-06 | 2010-11-24 | 山东泰开高压开关有限公司 | Installation structure of probe for GIS partial discharge online monitor diagnosis device |
| CN102288885A (en) * | 2010-12-31 | 2011-12-21 | 保定天威集团有限公司 | Internal fault detection window of transformer |
| CN202421431U (en) * | 2012-02-13 | 2012-09-05 | 广东电网公司电力科学研究院 | Hot-line test window for partial discharge of transformer |
-
2012
- 2012-02-13 CN CN2012100307167A patent/CN102540032A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1821796A (en) * | 2006-03-28 | 2006-08-23 | 华北电力大学（北京） | Window type online monitor for detecting gas insulation combined electric appliance (GIS) |
| JP2009080057A (en) * | 2007-09-27 | 2009-04-16 | Mitsubishi Electric Corp | Partial discharge source discrimination device of oil-immersed transformer |
| CN201562521U (en) * | 2009-11-03 | 2010-08-25 | 保定天威集团有限公司 | Bushing lifting pedestal hand hole structure of high-voltage transformer |
| CN201654077U (en) * | 2010-05-06 | 2010-11-24 | 山东泰开高压开关有限公司 | Installation structure of probe for GIS partial discharge online monitor diagnosis device |
| CN102288885A (en) * | 2010-12-31 | 2011-12-21 | 保定天威集团有限公司 | Internal fault detection window of transformer |
| CN202421431U (en) * | 2012-02-13 | 2012-09-05 | 广东电网公司电力科学研究院 | Hot-line test window for partial discharge of transformer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510775A (en) * | 2015-11-27 | 2016-04-20 | 广东电网有限责任公司电力科学研究院 | Installation method of ultrahigh-frequency sensor |
| CN105842589A (en) * | 2016-03-21 | 2016-08-10 | 上海申色电气有限公司 | Device, system and method for detecting GIS local discharge |
| CN106249113A (en) * | 2016-08-18 | 2016-12-21 | 张春辉 | A kind of method to set up of equivalence transducer |
| CN107589356A (en) * | 2017-10-19 | 2018-01-16 | 桂林师范高等专科学校 | Transformer insulated property detection means |
| CN113866624A (en) * | 2021-09-27 | 2021-12-31 | 广东电网有限责任公司 | GIS partial discharge live-line testing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102540032A (en) | Live testing window for partial discharge of transformer | |
| CN102435919B (en) | Tester for testing SF6 gas discharge decomposition product characteristics | |
| CN102709037B (en) | A kind of transformator possessing built-in sensors | |
| Okabe et al. | New aspects of UHF PD diagnostics on gas-insulated systems | |
| CN203811754U (en) | An enclosed type gas insulation combined electric appliance partial discharge detection device | |
| TW201432279A (en) | Method of utilizing vocal features for determining malfunctions of electrical equipment caused by arc discharge, mechanical vibration and abnormal displacement | |
| CN102175950A (en) | Mobile field partial discharge source visual detection method for GIS (gas insulated switchgear) | |
| CN202421420U (en) | Ultrahigh frequency and pulse current based GIS (gas insulated switchgear) partial-discharge online monitoring device | |
| CN105334483B (en) | Superfrequency partial discharge transducer sensitivity verifying attachment built in a kind of combined electrical apparatus | |
| CN203606277U (en) | Device for intelligently detecting ozone content of partial discharge of high-tension switch cabinet | |
| CN202421431U (en) | Hot-line test window for partial discharge of transformer | |
| CN112858845A (en) | Partial discharge diagnosis method for gas insulated switchgear | |
| CN109799432B (en) | Electrical equipment discharge fault positioning device | |
| CN106291272B (en) | A kind of high voltage switch cabinet fault monitoring device | |
| CN103176157A (en) | Method for checking detection range of GIS (gas insulated switchgear) partial discharge UHF (ultra high frequency) external sensors | |
| CN205786976U (en) | A kind of Partial Discharge Detection sonac detects box | |
| CN204044215U (en) | A kind of many mouthfuls of high-frequency pulse current transformers putting detection and location for office | |
| CN202678075U (en) | Transformer equipped with built-in sensors | |
| He et al. | Analysis method of abnormal condition in GIS based on ultrasonic detection | |
| CN107093469B (en) | Hydrogen gas lines anti-leak and leakage detection method in nuclear power station | |
| CN100456041C (en) | Window type online monitor for detecting gas insulation combined electric appliance (GIS) | |
| Yaacob et al. | Partial discharge signal detection using ultra high frequency method in high voltage power equipments: A review | |
| CN103472287B (en) | The electrostatic sensing arrangement of electrostatic attenuation performance test | |
| CN202693736U (en) | Online partial discharge detecting sensor of GIS (gas insulated substation) | |
| Kuppuswamy et al. | Experience with UHF partial discharge measurements |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120704 |