CN103472368B - The phasing adjustement of a kind of cable outlet Existing during Partial Discharge Test for Transformer and using method thereof - Google Patents
The phasing adjustement of a kind of cable outlet Existing during Partial Discharge Test for Transformer and using method thereof Download PDFInfo
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- CN103472368B CN103472368B CN201310211310.3A CN201310211310A CN103472368B CN 103472368 B CN103472368 B CN 103472368B CN 201310211310 A CN201310211310 A CN 201310211310A CN 103472368 B CN103472368 B CN 103472368B
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- 238000012360 testing method Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims description 7
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 238000005259 measurement Methods 0.000 claims abstract description 15
- 230000005284 excitation Effects 0.000 claims abstract description 8
- 230000001360 synchronised effect Effects 0.000 claims abstract description 7
- 230000005611 electricity Effects 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 2
- 230000004907 flux Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Abstract
The present invention relates to the phasing adjustement of a kind of cable outlet Existing during Partial Discharge Test for Transformer, connect between a described made bottom shielding of bushing of phase bushing and earth point a detection impedance, this impedance connects the Measurement channel port of a detector by cable, connecting between the made bottom shielding of bushing of any one phase bushing in another two-phase and earth point an electric capacity, this electric capacity two ends are connected two synchronous signal port of described detector respectively by a cable.In the present invention, Series detectors impedance on the bottom shielding of bushing of a phase bushing, in another two-phase the bushing of any one phase bottom shielding of bushing on series capacitance, apply excitation voltage in low-pressure side, the phase place adjusting synchronizing signal i.e. obtains the zero phase of test voltage, whole operation is all carried out in outside, the structure of cable outlet transformer need not be destroyed, solve the problem that the type transformer cannot draw high-pressure side when partial discharge test, easy operation, safe and reliable, applicable scene is tested.
Description
Technical field
The invention belongs to cable outlet transformer testing technical field, especially a kind of cable outlet Existing during Partial Discharge Test for Transformer
Phasing adjustement and using method thereof.
Background technology
Existing during Partial Discharge Test for Transformer can not only effectively check that transformer in design, production, transport, installation and is deposited in running
Problem, moreover it is possible to discovery inside transformer insulation defect and hidden danger, be to ensure that transformer long-term safety run requisite
Pilot project.The inside shelf depreciation of transformer typically occurs in 0-90 ° of test voltage, in the phase range of 180-270 °,
Have close ties with test voltage phase place.Tester is when measurement of partial discharge, it is to be understood that the zero phase of test voltage, this
Identification shelf depreciation and interference are benefited.Accordingly, it is determined that the zero phase of test voltage is a weight in measurement of partial discharge
Want link, when carrying out measurement of partial discharge every time, all should first determine zero phase.
" DL/T 417-2006 power equipment shelf depreciation in-site measurement directive/guide " proposes, it is possible to use highvoltage resistance potential divider
Or at high-pressure side, the zero phase that one Point Corona Discharge determines test voltage is set.But common cable outlet structure
Transformer device structure is as it is shown on figure 3, install bushing 5 on transformer body 15, bushing upper end is by conducting rod 12 even
Connecing pot head 13, pot head connects cable 14, is set with outside bushing, conducting rod and pot head
Connecting cylinder 11, is full of transformer oil in connecting cylinder, this structure can be saved spatial volume, be avoided filthy and various air bar completely
The impact of part, safe and reliable to operation, it has been widely used in indoor substation and heavy pollution area, in testing at the scene, cable goes out
The method that line transformer cannot use " directive/guide " to provide determines the zero phase of test voltage.
Content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, a kind of cable outlet transformation rational in infrastructure, convenient to operate is provided
The phasing adjustement of device partial discharge test.
The present invention adopts the technical scheme that:
A kind of phasing adjustement of cable outlet Existing during Partial Discharge Test for Transformer, including transformer body and bushing, at transformer
Installing three bushings on body, each bushing lower end outer rim makes the bottom shielding of bushing for ground connection, it is characterised in that:
Wherein connecting between a made bottom shielding of bushing of phase bushing and earth point a detection impedance, this detection impedance connects one by cable
The Measurement channel port of detector, an electricity of connecting between the made bottom shielding of bushing of any one phase bushing in another two-phase and earth point
Holding, this electric capacity two ends are connected two synchronous signal port of described detector respectively by a cable；
The cable sheath ground connection that described detection impedance connects；
Described detection impedance is RLC type, and tuning capacitance is 400～6000pF, discharge capacity 250mA；
Described capacitance is 0.5 μ F, and both end voltage is 10～300V.
It is a further object to provide the using method of the phasing adjustement of a kind of cable outlet Existing during Partial Discharge Test for Transformer,
It is characterized in that: comprise the following steps:
(1) connect between a made bottom shielding of bushing of phase bushing and earth point wherein a detection impedance, by cable by detection resistance
Anti-and detector Measurement channel port connects；
(2) connect between the made bottom shielding of bushing of any one phase bushing in another two-phase and earth point an electric capacity, this electric capacity two ends
Connected two synchronous signal port of described detector respectively by a cable；
(3) apply excitation voltage at step down side, make an on high-tension side phase induced voltage reach test voltage；
(4) adjusting the phase place of the synchronizing signal of detector so that it is mobile 180 degree, the zero phase that now detector shows is i.e. test
The zero phase of voltage.
Advantages of the present invention and good effect be:
In the present invention, Series detectors impedance on the bottom shielding of bushing of a phase bushing, the high gland of any one phase in another two-phase
Series capacitance on the bottom shielding of bushing of pipe, applies excitation voltage in low-pressure side, and the phase place adjusting synchronizing signal i.e. obtains test voltage
Zero phase, whole operation is all carried out in outside, need not destroy the structure of cable outlet transformer, solve the type transformer
The problem that cannot draw high-pressure side when partial discharge test, easy operation, safe and reliable, applicable scene is tested.
Brief description
Fig. 1 is the structural representation of the present invention；
Fig. 2 magnetic flux distribution schematic diagram；
Fig. 3 is the structural representation of cable outlet transformer.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further described, and following embodiment is illustrative, is not determinate, it is impossible to
Limit protection scope of the present invention with following embodiment.
The phasing adjustement of a kind of cable outlet Existing during Partial Discharge Test for Transformer, as it is shown in figure 1, include transformer body 15 and high pressure
Sleeve pipe 5, installs three bushings on transformer body, and each bushing lower end outer rim makes the sleeve pipe end for ground connection
Screen 10, the innovation of the present invention is: connect between a described made bottom shielding of bushing of phase bushing and earth point and one detects impedance 7,
This impedance connects the Measurement channel port 2 of a detector 1 by cable 3, the made set of any one phase bushing in another two-phase
Connect between pipe end shield and earth point an electric capacity 9, this electric capacity two ends connected by a cable 8 respectively two of described detector with
Step signal port 4.
In the present embodiment, the cable sheath 6 that described detection impedance connects is grounded.Described detection impedance is RLC type, tuning capacitance
It is 400～6000pF, discharge capacity 250mA.Described capacitance is 0.5 μ F, and both end voltage is 10～300V.
The using method of the phasing adjustement of above-mentioned cable outlet Existing during Partial Discharge Test for Transformer, comprises the following steps:
(1) connect between a made bottom shielding of bushing of phase bushing and earth point a detection impedance, by cable will detect impedance and
The Measurement channel port of detector connects；
(2) connect between the made bottom shielding of bushing of any one phase bushing in another two-phase and earth point an electric capacity, this electric capacity two ends
Connected two synchronous signal port of described detector respectively by a cable；
(3) apply excitation voltage at step down side, make an on high-tension side phase induced voltage reach test voltage；
(4) adjusting the phase place of the synchronizing signal of detector so that it is mobile 180 degree, the zero phase that now detector shows is i.e. test
The zero phase of voltage.
Existing during Partial Discharge Test for Transformer wiring and unshakable in one's determination in magnetic flux distribution as in figure 2 it is shown, as a example by A phase study.Transformer low voltage
Applying excitation voltage between side a, c, high-pressure side A phase induced voltage reaches test voltage.From magnetic flux distribution, ФAWith ФB、
ФCIn opposite direction.Therefore, the voltage that B, C phase induces and A phase voltage phase 180 degree.So, when A phase study,
Can press from B phase or C phase power taking and its phase shift 180 degree with A phase voltage same-phase, namely can be determined test electricity
The zero phase of pressure.The voltage of B phase or C phase obtains can be by connecting a suitable electric capacity between bottom shielding of bushing with earth point
Device realizes.
Embodiment
Measurement of partial discharge, transformer model are carried out to a 220kV transformer in certain 220kV transformer station
SSZ11-180000/220。
Instrument and specification that test uses are as follows:
Detector, model XD2102, Hangzhou Xihu Institute of Electronic Research produces, 2 Measurement channel, detection sensitivity 0.1pC,
Measurement frequency band three dB bandwidth 10kHz-500kHz, the sampling rate 10M/ second, synchronizing signal allows voltage range 10～300V.
Detection impedance Z m, structure is RLC type, tuning capacitance 400～6000pF, discharge capacity 250mA.
Holding wire uses single screened coaxial cable, long 10m.
Condenser capacity 0.5 μ F.
As a example by the A phase of cable outlet transformer:
(1) connect between the made bottom shielding of bushing of A phase bushing and earth point one detection impedance, by cable will detect impedance and
The Measurement channel port of detector connects；
(2) connecting between the made bottom shielding of bushing of B phase bushing and earth point an electric capacity, a cable is passed through at this electric capacity two ends respectively
Connect two synchronous signal port of described detector；
(3) apply excitation voltage at step down side a, c, make on high-tension side A phase induced voltage reach test voltage；
(4) adjusting the phase place of the synchronizing signal of detector so that it is mobile 180 degree, the zero phase that now detector shows is i.e. test
The zero phase of voltage.
Advantages of the present invention and good effect be:
In the present invention, Series detectors impedance on the bottom shielding of bushing of a phase bushing, the high gland of any one phase in another two-phase
Series capacitance on the bottom shielding of bushing of pipe, applies excitation voltage in low-pressure side, and the phase place adjusting synchronizing signal i.e. obtains test voltage
Zero phase, whole operation is all carried out in outside, need not destroy the structure of cable outlet transformer, solve the type transformer
The problem that cannot draw high-pressure side when partial discharge test, easy operation, safe and reliable, applicable scene is tested.
Claims (2)
1. a phasing adjustement for cable outlet Existing during Partial Discharge Test for Transformer, including transformer body and bushing, in transformation
Installing three bushings on device body, each bushing lower end outer rim makes the bottom shielding of bushing for ground connection, it is characterised in that:
Wherein connecting between a made bottom shielding of bushing of phase bushing and earth point a detection impedance, this detection impedance connects one by cable
The Measurement channel port of detector, an electricity of connecting between the made bottom shielding of bushing of any one phase bushing in another two-phase and earth point
Holding, this electric capacity two ends are connected two synchronous signal port of described detector respectively by a cable；
The cable sheath ground connection that described detection impedance connects；
Described detection impedance is RLC type, and tuning capacitance is 400～6000pF, discharge capacity 250mA；
Described capacitance is 0.5 μ F, and both end voltage is 10～300V.
2. the using method of the phasing adjustement of a kind of cable outlet Existing during Partial Discharge Test for Transformer according to claim 1, its
It is characterised by: comprise the following steps:
(1) connect between a made bottom shielding of bushing of phase bushing and earth point wherein a detection impedance, by cable by detection resistance
Anti-and detector Measurement channel port connects；
(2) connect between the made bottom shielding of bushing of any one phase bushing in another two-phase and earth point an electric capacity, this electric capacity two ends
Connected two synchronous signal port of described detector respectively by a cable；
(3) apply excitation voltage at step down side, make the induced voltage of the on high-tension side phase installing detection impedance reach test
Voltage；
(4) adjusting the phase place of the synchronizing signal of detector so that it is mobile 180 degree, the zero phase that now detector shows is i.e. test electricity
The zero phase of pressure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310211310.3A CN103472368B (en) | 2013-05-31 | 2013-05-31 | The phasing adjustement of a kind of cable outlet Existing during Partial Discharge Test for Transformer and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310211310.3A CN103472368B (en) | 2013-05-31 | 2013-05-31 | The phasing adjustement of a kind of cable outlet Existing during Partial Discharge Test for Transformer and using method thereof |
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| CN103472368A CN103472368A (en) | 2013-12-25 |
| CN103472368B true CN103472368B (en) | 2016-11-09 |
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| CN103744004A (en) * | 2013-12-31 | 2014-04-23 | 内蒙古大唐国际托克托发电有限责任公司 | Transformer/reactor partial discharge online monitoring method and monitoring system |
| CN113009304B (en) * | 2021-03-22 | 2023-03-24 | 保定天威保变电气股份有限公司 | Novel transformer cable socket test device and method |
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| JP3172626B2 (en) * | 1992-09-09 | 2001-06-04 | 日立電線株式会社 | Partial discharge detection method for high voltage equipment |
| CN202486270U (en) * | 2012-02-13 | 2012-10-10 | 天威云南变压器股份有限公司 | Field partial discharge test circuit and system for high-voltage side lead-in cable of transformer |
| CN102590564A (en) * | 2012-03-05 | 2012-07-18 | 天威云南变压器股份有限公司 | Wiring structure for partial discharge test of balance traction transformer |
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