CN106052810A - Electromagnetic-control-type-vibration-sensor-based oil level fault diagnosis method for oil-immersed power transformer - Google Patents
Electromagnetic-control-type-vibration-sensor-based oil level fault diagnosis method for oil-immersed power transformer Download PDFInfo
- Publication number
- CN106052810A CN106052810A CN201610577988.7A CN201610577988A CN106052810A CN 106052810 A CN106052810 A CN 106052810A CN 201610577988 A CN201610577988 A CN 201610577988A CN 106052810 A CN106052810 A CN 106052810A
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- China
- Prior art keywords
- oil
- oil level
- transformer
- electric magnet
- level
- 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.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/20—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of apparatus for measuring liquid level
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
Abstract
The invention discloses an electromagnetic-control-type-vibration-sensor-based oil level fault diagnosis method for an oil-immersed power transformer, so that a problem that the existing oil level indicator fails to monitor an oil surface of an oil-immersed power transformer in operation can be solved. An oil level indicator (4) is arranged on a transformer expansion tank (3); an oil level testing box (5) is arranged on an outer side plane of the transformer expansion tank (3); a right oil level measuring dial gauge (13) and a left oil level measuring dial gauge (14) are arranged on the oil level testing box (5); an electromagnet (16) is arranged on the right oil level measuring dial gauge (13) movably; a coil (17) on the electromagnet (16) is connected with an electric controller (11) electrically; a vibration sensor (7) is arranged on the electromagnet (16) movably and is connected with a vibration frequency monitoring instrument (10) electrically by a signal transmission line (9). According to the invention, testing and diagnosis can be carried out on the premise that the power of the transformer is not interrupted.
Description
Technical field
The present invention relates to a kind of oil-filled transformer vacation oil level diagnostic equipment and diagnostic method, for oil-immersed type power transformation
There is identification during false oil level in device.
Background technology
In power industry, use oil-immersed power transformer in a large number, and conservator is the vitals of transformator.Work as transformation
When device oil temperature raises, the oil in fuel tank can expand accordingly, makes the oil level in conservator raise accordingly, now the portion gas in conservator
Discharge through respiratory organ；When temperature of oil in transformer declines, the oil in fuel tank can shrink accordingly, and the oil level in conservator can decline accordingly,
The now internal suction part gas of conservator.Air is discharged or sucked to installation for transformer by respiratory organ, is formed and breathes work normally
With, reach to keep the pressure balanced purpose of oil tank of transformer.On conservator, generally it is provided with an oil level indicator, is used to refer to oil
The height of oil level in pillow, it is ensured that the safe operation of transformator.Oil-immersed power transformer run in, oil level indicator it sometimes appear that
Fault or conservator capsule occur abnormal, and oil level indicator instruction is not inconsistent with actual oil level, form false oil level phenomenon, cause operation
In the supervision distortion of oil-immersed power transformer pasta, transformator oil spout or oil starvation can be caused time serious, even cause transformation
Device is stopped transport or insulation breakdown is damaged.
Summary of the invention
The invention provides the oil-immersed power transformer vacation oil level diagnostic equipment of a kind of Electromagnetic Control vibrating sensor, solve
Existing oil level indicator of having determined monitors the technical problem lost efficacy to operating oil-immersed power transformer pasta.
The present invention is to solve above technical problem by the following technical programs:
The oil-immersed power transformer vacation oil level diagnostic equipment of a kind of Electromagnetic Control vibrating sensor, including the transformation being currently running
Device, is provided with oil tank of transformer (1) on the transformator being currently running, and is respectively arranged with transformator on oil tank of transformer (1)
Sleeve pipe (2) and installation for transformer (3), be provided with oil level indicator (4), it is characterised in that at transformer oil on installation for transformer (3)
It is provided with oil level testing cassete (5) on the medial plane of pillow (3), oil level testing cassete (5) is respectively arranged with right oil-level measurement and carves
Degree table (13) and left oil-level measurement graduation apparatus (14), be movably set with electric magnet (16) on right oil-level measurement graduation apparatus (13),
Coil (17) on electric magnet (16) is electrically connected with electric controller (11), is provided with vibrating sensor on electric magnet (16)
(7), vibrating sensor (7) is electrically connected by signal transmission line (9) with frequency of vibration monitor (10), vibrating sensor
(7) it is provided between the medial plane of electric magnet (16) and installation for transformer (3).
Being provided with motor (6) on oil level testing cassete (5), and left oil level upper right oil-level measurement graduation apparatus (13) is surveyed
It is provided with track (15) in amount graduation apparatus (14), track (15) is provided with the mobile dolly of electric magnet (16), electric magnet
(16) mobile dolly links together with the output shaft (12) of motor (6), sets on the mobile dolly of electric magnet (16)
Being equipped with vibrating sensor (7), motor (6) is electrically connected by control line (8) with electric controller (11).
The oil-immersed power transformer vacation oil level diagnostic method of a kind of Electromagnetic Control vibrating sensor, comprises the following steps:
The first step, oil level testing cassete (5) is set on the medial plane of installation for transformer (3), upper respectively at oil level testing cassete (5)
Right oil-level measurement graduation apparatus (13) and left oil-level measurement graduation apparatus (14) are set, set in the upper activity of right oil-level measurement graduation apparatus (13)
Putting vibrating sensor (7), vibrating sensor (7) is connected electrically in one with frequency of vibration monitor (10) by signal transmission line (9)
Rise；
Second step, the mobile dolly of electric magnet (16) is moved, by automatically controlled from top to bottom along left oil-level measurement graduation apparatus (14)
Device (11) makes coil (17) compartment of terrain on electric magnet (16) obtain electric, makes the probe compartment of terrain absorption of vibrating sensor (7) become
On the medial plane of depressor conservator (3), observe the vibrational waveform on frequency of vibration monitor (10), when frequency of vibration monitor
(10), when the vibrational waveform on changes, stop the mobile dolly of Mobile electromagnetic ferrum (16), read the oil-level measurement of this position
Scale, and compare with the instruction oil level of the oil level indicator (4) of setting on installation for transformer (3), when difference is more than 10 millimeters,
Judge that oil level indicator exists false oil level.
A diameter of 10-16 millimeter of the probe of vibrating sensor, vibrating sensor (7) once vibrates every 8 millimeters of samplings
Frequency signal, the first sampling point on right oil-level measurement graduation apparatus (13) is than the sampling on left oil-level measurement graduation apparatus (14)
Starting point is high 4 millimeters.
The present invention utilizes the conservator of transformator operationally to have oily position different with the frequency of vibration characteristic at oil-free position, right
The actual oil level of conservator positions, thus finds the problem whether oil level indicator of transformator exists false oil level.The present invention be
Transformator carries out testing and diagnosing in the case of not having a power failure, and running transformer safety does not has any negative interaction.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of the oil level testing cassete 5 of the present invention；
Fig. 3 is the fiting relation figure between the installation for transformer 3 of the present invention and electric magnet 16 and vibrating sensor 7.
Detailed description of the invention
The present invention is described in detail below in conjunction with the accompanying drawings:
The oil-immersed power transformer vacation oil level diagnostic equipment of a kind of Electromagnetic Control vibrating sensor, including the transformation being currently running
Device, is provided with oil tank of transformer (1) on the transformator being currently running, and is respectively arranged with transformator on oil tank of transformer (1)
Sleeve pipe (2) and installation for transformer (3), be provided with oil level indicator (4), in the outside of installation for transformer (3) on installation for transformer (3)
It is provided with oil level testing cassete (5) in plane, oil level testing cassete (5) is respectively arranged with right oil-level measurement graduation apparatus (13) and a left side
Oil-level measurement graduation apparatus (14), is movably set with electric magnet (16), on electric magnet (16) on right oil-level measurement graduation apparatus (13)
Coil (17) be electrically connected with electric controller (11), electric magnet (16) is provided with vibrating sensor (7), vibrating sensing
Device (7) is electrically connected by signal transmission line (9) with frequency of vibration monitor (10), and vibrating sensor (7) is provided in
Between the medial plane of electric magnet (16) and installation for transformer (3).
Being provided with motor (6) on oil level testing cassete (5), and left oil level upper right oil-level measurement graduation apparatus (13) is surveyed
It is provided with track (15) in amount graduation apparatus (14), track (15) is provided with the mobile dolly of electric magnet (16), electric magnet
(16) mobile dolly links together with the output shaft (12) of motor (6), sets on the mobile dolly of electric magnet (16)
Being equipped with vibrating sensor (7), motor (6) is electrically connected by control line (8) with electric controller (11).
The oil-immersed power transformer vacation oil level diagnostic method of a kind of Electromagnetic Control vibrating sensor, comprises the following steps:
The first step, oil level testing cassete (5) is set on the medial plane of installation for transformer (3), upper respectively at oil level testing cassete (5)
Right oil-level measurement graduation apparatus (13) and left oil-level measurement graduation apparatus (14) are set, set in the upper activity of right oil-level measurement graduation apparatus (13)
Putting vibrating sensor (7), vibrating sensor (7) is connected electrically in one with frequency of vibration monitor (10) by signal transmission line (9)
Rise；
Second step, the mobile dolly of electric magnet (16) is moved, by automatically controlled from top to bottom along left oil-level measurement graduation apparatus (14)
Device (11) makes coil (17) compartment of terrain on electric magnet (16) obtain electric, makes the probe compartment of terrain absorption of vibrating sensor (7) become
On the medial plane of depressor conservator (3), observe the vibrational waveform on frequency of vibration monitor (10), when frequency of vibration monitor
(10), when the vibrational waveform on changes, stop the mobile dolly of Mobile electromagnetic ferrum (16), read the oil-level measurement of this position
Scale, and compare with the instruction oil level of the oil level indicator (4) of setting on installation for transformer (3), when difference is more than 10 millimeters,
Judge that oil level indicator exists false oil level.
A diameter of 10-16 millimeter of the probe of vibrating sensor, vibrating sensor (7) once vibrates every 8 millimeters of samplings
Frequency signal, the first sampling point on right oil-level measurement graduation apparatus (13) is than the sampling on left oil-level measurement graduation apparatus (14)
Starting point is high 4 millimeters.
The present invention the most always in regular vibration, utilizes vibrating sensor sampling to shake by transformator and conservator
Dynamic frequency signal, when when having oily position and oil-free position of vibrating sensor sampling installation for transformer (3), their frequency characteristic
It is different, by this feature, the actual oil level of installation for transformer (3) is positioned, and compare with oil level indicator 4, typically work as
When actual oil level is more than 10 millimeters with oil level indicator difference in height, it is believed that oil level indicator 4 has problems, and oil level indicator 4 can not reflect in time
The oil level of installation for transformer (3), when inside transformer oil starvation, if oil level indicator 4 can not reflect timely, it would be possible to make
The fault becoming transformator is stopped transport.The oil level testing cassete 5 of the present invention is to inhale the side in installation for transformer (3) by the Magnet on four angles
In plane, near oil level indicator 4, can be with the actual oil level of direct visual comparison test and the level height of oil level indicator 4 display.Transformator
1 and installation for transformer (3) operationally vibrate, utilize the frequency signal that vibrating sensor 7 samples, when vibrating sensor 7 is adopted
When having oily position and oil-free position of sample installation for transformer (3), their frequency characteristic is different, by this feature to oil
The actual oil level of pillow positions, and compares with oil level indicator 4, typically when the discrepancy in elevation of actual oil level and oil level indicator 4 display is more than 10
During millimeter, it is believed that oil level indicator 4 has problems, namely false oil level.A diameter of 10-16 millimeter of vibrating sensor 7 is advisable, if arranging
A diameter of 12 millimeters of vibrating sensor 7, control vibrating sensor 7 by control motor 6 and sample on track 15
Time, arrange vibrating sensor every 8 millimeters sample frequency of vibration characteristics, the left side of testing cassete from distance conservator bottom
4 millimeters start sampling, the most respectively at 4 millimeters, 12 millimeters, 20 millimeters, 28 millimeters ... the like sampling frequency of vibration letter
Number, and bottom conservator, start sampling on the right side of testing cassete, the most respectively at 0,8 millimeters, 16 millimeters, 24 millimeters, 32 millis
Rice ... the like sampling frequency of vibration.The most respectively by the variations in skews of left and right side height of sampling, improve test oil
The precision of position.Such as, when left side is on 44 millimeters of scales, finding that frequency of vibration there occurs change, right side is sent out at 40 millimeters of scales
Given birth to change, it is judged that actual level height between 40-44 millimeter, the method averaged, i.e. oil level actual height (40+
44)/2=42 millimeter, makes measuring accuracy be less than 2 millimeters.
Claims (2)
1. an oil-immersed power transformer vacation oil level diagnostic equipment for Electromagnetic Control vibrating sensor, including the change being currently running
Depressor, is provided with oil tank of transformer (1) on the transformator being currently running, and is respectively arranged with transformation on oil tank of transformer (1)
Device sleeve pipe (2) and installation for transformer (3), be provided with oil level indicator (4), it is characterised in that at transformator on installation for transformer (3)
It is provided with oil level testing cassete (5) on the medial plane of conservator (3), oil level testing cassete (5) is respectively arranged with right oil-level measurement
Graduation apparatus (13) and left oil-level measurement graduation apparatus (14), be movably set with electric magnet on right oil-level measurement graduation apparatus (13)
(16), the coil (17) on electric magnet (16) is electrically connected with electric controller (11), is provided with vibration on electric magnet (16)
Sensor (7), vibrating sensor (7) is electrically connected by signal transmission line (9) with frequency of vibration monitor (10), vibration
Sensor (7) is provided between the medial plane of electric magnet (16) and installation for transformer (3).
The oil-immersed power transformer vacation oil level diagnosis dress of a kind of Electromagnetic Control vibrating sensor the most according to claim 1
Put, it is characterised in that on oil level testing cassete (5), be provided with motor (6), upper and left right oil-level measurement graduation apparatus (13)
It is provided with track (15) on oil-level measurement graduation apparatus (14), track (15) is provided with the mobile dolly of electric magnet (16),
The mobile dolly of electric magnet (16) links together with the output shaft (12) of motor (6), little in the movement of electric magnet (16)
Being provided with vibrating sensor (7) on car, motor (6) is electrically connected by control line (8) with electric controller (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610577988.7A CN106052810A (en) | 2016-07-21 | 2016-07-21 | Electromagnetic-control-type-vibration-sensor-based oil level fault diagnosis method for oil-immersed power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610577988.7A CN106052810A (en) | 2016-07-21 | 2016-07-21 | Electromagnetic-control-type-vibration-sensor-based oil level fault diagnosis method for oil-immersed power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106052810A true CN106052810A (en) | 2016-10-26 |
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ID=57188295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610577988.7A Pending CN106052810A (en) | 2016-07-21 | 2016-07-21 | Electromagnetic-control-type-vibration-sensor-based oil level fault diagnosis method for oil-immersed power transformer |
Country Status (1)
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| CN (1) | CN106052810A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108288531A (en) * | 2018-01-09 | 2018-07-17 | 国网山东省电力公司滨州供电公司 | A kind of transformer oil level auxiliary conditioning unit |
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Cited By (2)
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Application publication date: 20161026 |