CN106052809A - Oil level fault diagnosis device for oil-immersed power transformer - Google Patents
Oil level fault diagnosis device for oil-immersed power transformer Download PDFInfo
- Publication number
- CN106052809A CN106052809A CN201610577987.2A CN201610577987A CN106052809A CN 106052809 A CN106052809 A CN 106052809A CN 201610577987 A CN201610577987 A CN 201610577987A CN 106052809 A CN106052809 A CN 106052809A
- Authority
- CN
- China
- Prior art keywords
- oil
- transformer
- oil level
- level
- vibrating sensor
- 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
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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 oil level fault diagnosis device 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. A transformer oil tank (1) is arranged on a transformer in operation; a transformer casing tube (2) and a transformer expansion tank (3) are arranged on the transformer oil tank (1); and an oil level indicator (4) is arranged on the transformer expansion tank (3). The device is characterized in that an oil level testing box (5) is arranged on the plane at the outer side 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); a vibration sensor (7) is arranged on the right oil level measuring dial gauge (13) movably and 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 a kind of oil-immersed power transformer vacation oil level diagnostic equipment, solve existing oil level indicator to fortune
The technical problem monitoring inefficacy of the oil-immersed power transformer pasta in row.
The present invention is to solve above technical problem by the following technical programs:
A kind of oil-immersed power transformer vacation oil level diagnostic equipment, including the transformator being currently running, in the transformation being currently running
It is provided with oil tank of transformer on device, oil tank of transformer is respectively arranged with bushing shell for transformer and installation for transformer, at transformator
It is provided with oil level indicator on conservator, the medial plane of installation for transformer is provided with oil level testing cassete, oil level testing cassete divides
It is not provided with right oil-level measurement graduation apparatus and left oil-level measurement graduation apparatus, right oil-level measurement graduation apparatus is movably set with vibration
Sensor, vibrating sensor is electrically connected by signal transmission line with frequency of vibration monitor.
Oil level testing cassete is provided with motor, on right oil-level measurement graduation apparatus and on left oil-level measurement graduation apparatus
It is provided with track, is provided with the mobile dolly of vibrating sensor in orbit, the mobile dolly of vibrating sensor and stepping electricity
The output shaft of machine links together, and is provided with vibrating sensor, motor and motor on the mobile dolly of vibrating sensor
Control device to be electrically connected by control line.
A kind of oil-immersed power transformer vacation oil level diagnostic method, comprises the following steps:
The first step, oil level testing cassete is set on the medial plane of installation for transformer, oil level testing cassete is respectively provided with right oil
Position Measurement scales table and left oil-level measurement graduation apparatus, on right oil-level measurement graduation apparatus, activity arranges vibrating sensor, and vibration passes
Sensor is electrically connected by signal transmission line with frequency of vibration monitor；
Second step, vibrating sensor is moved from top to bottom along left oil-level measurement graduation apparatus, observe on frequency of vibration monitor
Vibrational waveform, when the vibrational waveform on frequency of vibration monitor changes, stops mobile vibrating sensor, reads this position
Oil-level measurement scale, and compare, when difference is more than 10 millis with the instruction oil level of oil level indicator that arranges on installation for transformer
Meter Shi, it is judged that oil level indicator exists false oil level.
A diameter of 10-16 millimeter of the probe of vibrating sensor, vibrating sensor is every 8 millimeters of frequency of vibration of sampling
Signal, first sampling point 4 millis higher than the first sampling point on left oil-level measurement graduation apparatus on right oil-level measurement graduation apparatus
Rice.
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.
Detailed description of the invention
The present invention is described in detail below in conjunction with the accompanying drawings:
A kind of oil-immersed power transformer vacation oil level diagnostic equipment, including the transformator being currently running, in the transformation being currently running
It is provided with oil tank of transformer 1 on device, oil tank of transformer 1 is respectively arranged with bushing shell for transformer 2 and installation for transformer 3, becoming
It is provided with oil level indicator 4 on depressor conservator 3, the medial plane of installation for transformer 3 is provided with oil level testing cassete 5, survey at oil level
It is respectively arranged with right oil-level measurement graduation apparatus 13 and left oil-level measurement graduation apparatus 14, at right oil-level measurement graduation apparatus 13 on examination box 5
On be movably set with vibrating sensor 7, vibrating sensor 7 is connected electrically in by signal transmission line 9 with frequency of vibration monitor 10
Together.
Oil level testing cassete 5 is provided with motor 6, with left oil-level measurement scale on right oil-level measurement graduation apparatus 13
It is provided with track 15 on table 14, track 15 is provided with the mobile dolly of vibrating sensor 7, the movement of vibrating sensor 7
Dolly links together with the output shaft 12 of motor 6, is provided with vibrating sensor on the mobile dolly of vibrating sensor 7
7, motor 6 is electrically connected by control line 8 with motor control assembly 11.
A kind of oil-immersed power transformer vacation oil level diagnostic method, comprises the following steps:
The first step, oil level testing cassete 5 is set on the medial plane of installation for transformer 3, oil level testing cassete 5 is respectively provided with the right side
Oil-level measurement graduation apparatus 13 and left oil-level measurement graduation apparatus 14, on right oil-level measurement graduation apparatus 13, activity arranges vibrating sensor
7, vibrating sensor 7 is electrically connected by signal transmission line 9 with frequency of vibration monitor 10；
Second step, vibrating sensor 7 is moved from top to bottom along left oil-level measurement graduation apparatus 14, observe frequency of vibration monitor 10
On vibrational waveform, when the vibrational waveform on frequency of vibration monitor 10 changes, stop mobile vibrating sensor 7, read
Take the oil-level measurement scale of this position, and compare with the instruction oil level of the oil level indicator 4 of setting on installation for transformer 3, be on duty
Different when being more than 10 millimeters, it is judged 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 frequency every 8 millimeters of samplings
Rate signal, the first sampling point on right oil-level measurement graduation apparatus 13 is than the first sampling point on left oil-level measurement graduation apparatus 14
High 4 millimeters.
The present invention is operationally vibrated by transformator and conservator, utilizes vibrating sensor sampling frequency of vibration signal, when
Vibrating sensor when having oily position and oil-free position of installation for transformer 3 of sampling, their frequency characteristic is different, by this
The actual oil level of installation for transformer 3 is positioned by individual feature, and compares with oil level indicator 4, typically when actual oil level and oil level indicator
When difference in height is more than 10 millimeters, it is believed that oil level indicator 4 has problems, and oil level indicator 4 can not reflect the oil of installation for transformer 3 in time
Position, when inside transformer oil starvation, if oil level indicator 4 can not reflect timely, it would be possible to cause the fault of transformator to stop
Fortune.The oil level testing cassete 5 of the present invention is to inhale on the side plane of installation for transformer 3 by the Magnet on four angles, near oil level
Meter 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 exist
Vibrate during operation, utilize the frequency signal that vibrating sensor 7 samples, have oil when what installation for transformer 3 sampled by vibrating sensor 7
When position and oil-free position, their frequency characteristic is different, is positioned the actual oil level of conservator by this feature,
And compare with oil level indicator 4, typically when the discrepancy in elevation of actual oil level with oil level indicator 4 display is more than 10 millimeters, it is believed that oil level indicator 4 exists
Problem, namely false oil level.A diameter of 10-16 millimeter of vibrating sensor 7 is advisable, if arranging a diameter of the 12 of vibrating sensor 7
Millimeter, by control motor 6 control vibrating sensor 7 sample on track 15 time, vibrating sensor is set every 8
A millimeter frequency of vibration characteristic of sampling, in the left side of testing cassete, 4 millimeters bottom distance conservator start sampling, exist the most respectively
4 millimeters, 12 millimeters, 20 millimeters, 28 millimeters ... the like sampling frequency of vibration signal, and on the right side of testing cassete from oil
Start bottom pillow sampling, the most respectively at 0,8 millimeters, 16 millimeters, 24 millimeters, 32 millimeters ... the like sampling vibration frequency
Rate.The most respectively by the variations in skews of left and right side height of sampling, improve the precision of test oil level.Such as, when left side is at 44 millis
On meter Ke Du, finding that frequency of vibration there occurs change, right side there occurs change at 40 millimeters of scales, it is judged that actual level height exists
Between 40-44 millimeter, the method averaged, i.e. oil level actual height (40+44)/2=42 millimeter, make measuring accuracy be less than 2 millis
Rice.
Claims (2)
1. an oil-immersed power transformer vacation oil level diagnostic equipment, including the transformator being currently running, in the change being currently running
It is provided with oil tank of transformer (1) on depressor, oil tank of transformer (1) is respectively arranged with bushing shell for transformer (2) and transformer oil
Pillow (3), is provided with oil level indicator (4), it is characterised in that on installation for transformer (3) on the medial plane of installation for transformer (3)
It is provided with oil level testing cassete (5), oil level testing cassete (5) is respectively arranged with right oil-level measurement graduation apparatus (13) and left oil level is surveyed
Amount graduation apparatus (14), is movably set with vibrating sensor (7) on right oil-level measurement graduation apparatus (13), vibrating sensor (7) with
Frequency of vibration monitor (10) is electrically connected by signal transmission line (9).
A kind of oil-immersed power transformer vacation oil level diagnostic equipment the most according to claim 1, it is characterised in that at oil level
Motor (6) it is provided with, on right oil-level measurement graduation apparatus (13) and on left oil-level measurement graduation apparatus (14) on testing cassete (5)
It is provided with track (15), track (15) is provided with the mobile dolly of vibrating sensor (7), the shifting of vibrating sensor (7)
Dynamic dolly links together with the output shaft (12) of motor (6), is provided with and shakes on the mobile dolly of vibrating sensor (7)
Dynamic sensor (7), motor (6) is electrically connected by control line (8) with motor control assembly (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610577987.2A CN106052809A (en) | 2016-07-21 | 2016-07-21 | Oil level fault diagnosis device for oil-immersed power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610577987.2A CN106052809A (en) | 2016-07-21 | 2016-07-21 | Oil level fault diagnosis device for oil-immersed power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106052809A true CN106052809A (en) | 2016-10-26 |
Family
ID=57188387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610577987.2A Pending CN106052809A (en) | 2016-07-21 | 2016-07-21 | Oil level fault diagnosis device for oil-immersed power transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106052809A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110853885A (en) * | 2019-10-28 | 2020-02-28 | 湖南文理学院 | Oil-immersed intelligent power transformer |
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| CN202229807U (en) * | 2011-10-12 | 2012-05-23 | 华东电力试验研究院有限公司 | Differential pressure type oil level metering device |
| CN103196518A (en) * | 2013-04-17 | 2013-07-10 | 山东电力集团公司检修公司 | Transformer and respirator online monitor and operating method thereof |
| CN103314279A (en) * | 2010-10-12 | 2013-09-18 | 布兰斯特罗姆集团有限公司 | A method and an apparatus for indicating a critical level of a liquid flow |
| CN203573776U (en) * | 2013-11-20 | 2014-04-30 | 国家电网公司 | 220kV transformer adopting integrated fusion technique of sensors |
| CN204010924U (en) * | 2014-07-22 | 2014-12-10 | 浙江绿能电力科技有限公司 | A kind of Novel oil-immersed transformer |
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| CN103314279A (en) * | 2010-10-12 | 2013-09-18 | 布兰斯特罗姆集团有限公司 | A method and an apparatus for indicating a critical level of a liquid flow |
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| CN203573776U (en) * | 2013-11-20 | 2014-04-30 | 国家电网公司 | 220kV transformer adopting integrated fusion technique of sensors |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110853885A (en) * | 2019-10-28 | 2020-02-28 | 湖南文理学院 | Oil-immersed intelligent power transformer |
| CN110853885B (en) * | 2019-10-28 | 2021-06-01 | 湖南文理学院 | Oil-immersed intelligent power transformer |
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Application publication date: 20161026 |