CN106197334B - The online three-dimensional imaging monitoring method of transformer winding ultrasonic wave and system - Google Patents
The online three-dimensional imaging monitoring method of transformer winding ultrasonic wave and system Download PDFInfo
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- CN106197334B CN106197334B CN201610506535.5A CN201610506535A CN106197334B CN 106197334 B CN106197334 B CN 106197334B CN 201610506535 A CN201610506535 A CN 201610506535A CN 106197334 B CN106197334 B CN 106197334B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/04—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring the deformation in a solid, e.g. by vibrating string
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
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- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
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Abstract
The present invention proposes a kind of online three-dimensional imaging monitoring method of transformer winding ultrasonic wave, the transmitting probe and receiving transducer of ultrasonic wave is arranged on transformer case, so that ultrasonic wave is reflected in winding measured point；Winding distance is calculated according to the position of ultrasonic wave transmitting and the received time difference, velocity of wave and transmitting probe and receiving transducer, measured point position is converted into the coordinate value under transformer winding model coordinate system, wherein, the coordinate value using the distance of the transformer case at transmitting probe to winding measured point as measured point on an axis；The D coordinates value of multiple measured points is obtained, a transformer winding 3-D image is generated；Transformer winding 3-D image and the transformer winding threedimensional model image pre-established are compared, to determine whether transformer winding deforms.The present invention can not have a power failure to transformer on-line monitoring, to guarantee its safe and reliable operation, and may be implemented to carry out transformer winding state quantitative, visual inspection and analysis.
Description
Technical field
The present invention relates to transformer winding detection fields, in particular to be the online three-dimensional imaging of transformer winding ultrasonic wave
Monitoring method and system.
Background technique
Power transformer is important and expensive, during transportation due to accident collision or the powerful electricity of system short-circuit fault
The effect of power may damage immediately, but winding deformation to a certain degree generally only occurs, at this time as found and repairing not in time
Multiple deformation, it would be possible to cause electric power system fault.After deformation of transformer winding, some is damaged accident immediately, and some is then
It can still run for a long time.The transformer that winding has deformed can often continue to run within the long duration, cannot such as obtain
To in due course maintenance, cumulative effect can further develop, even if no longer there is short circuit accident, also result in transformer abnormally
It is out of service.Correctly timely deformation detection can guarantee that transformer fault element is timely replaced, and fault-free element obtains
It uses to greatest extent, to extend the actual life of transformer.
The research of related deformation of transformer winding detection is more and more in recent years, proposes a large amount of detection method.Due to
The quantity of China's Electrical Transformer investment power grid is constantly increasing, and traditional off-line checking method has been difficult to meet the requirements.
Traditional short circuit impedance method, Low Voltage Impulse Method, Frequency Response Analysis method achieve some effects, but these in the detection of winding deformation
Conventional method is all there is on-line checking is unable to, and sensitivity is poor, and anti-interference ability is lower, the shortcomings such as data acquisition difficulty,
It is even more impossible to be measured in real time intuitive analysis to winding.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of online three-dimensional imaging monitoring sides of transformer winding ultrasonic wave
Method, do not have a power failure to transformer on-line monitoring, to guarantee its safe and reliable operation, and may be implemented to transformer winding
State carries out quantitative, visual inspection and analysis.
To solve the above problems, the present invention proposes a kind of online three-dimensional imaging monitoring method of transformer winding ultrasonic wave, packet
Include following steps:
S1: arranging the transmitting probe and receiving transducer of ultrasonic wave on transformer case, and enters ultrasonic wave transmitting and connect
The working condition of receipts, so that ultrasonic wave is reflected in winding measured point；
S2: it is calculated according to the position of ultrasonic wave transmitting and the received time difference, velocity of wave and transmitting probe and receiving transducer
Measured point position is converted to the coordinate value under transformer winding model coordinate system according to winding distance by winding distance, wherein will
Transformer case at transmitting probe to winding measured point coordinate value of the distance as measured point on an axis, in addition on two axis
Coordinate value determined according to the relative position between transmitting probe, transformer case and winding；
S3: obtaining the D coordinates value of multiple measured points, generates a transformer winding three-dimensional figure according to each D coordinates value
Picture；
S4: transformer winding 3-D image and the transformer winding threedimensional model image pre-established are compared, with determination
Whether transformer winding deforms, and the transformer winding threedimensional model image is established under transformer winding model coordinate system.
According to one embodiment of present invention, in step S1 and S2, the position of transmitting probe and receiving transducer
The different then calculation of winding distance is different, comprising:
If the direction of propagation of incidence wave is vertical with the tangent plane of winding measured point, ultrasonic wave transmitting probe and ultrasonic wave are received
Probe arrangement is at the same position of transformer case；Then in winding distance, transformer case at transmitting probe to winding quilt
The distance of measuring point is the propagation distance of incidence wave；
If the direction of propagation of incidence wave and winding measured point tangent plane out of plumb, and transmitting probe is arranged in receiving transducer
The different location of transformer case similar face, alternatively, when incident direction of wave travel and winding measured point tangent plane out of plumb, and
Transmitting probe and receiving transducer are arranged in transformer case different surfaces；Then in winding distance, outside the transformer at transmitting probe
Shell to winding measured point distance according to the propagation distance of incidence wave and back wave, the space of angle and winding and transformer case
Relationship determines.
According to one embodiment of present invention, the wherein coordinate value in the coordinate value on other two axis is that transmitting is visited
Distance of the head away from central point, the central point are the vertical of the vertical line that the transformer case close to transmitting probe is arrived in the center of circle of winding
Point.
According to one embodiment of present invention, in step s 4, in the transformer winding 3-D image with transformer
The measured point coordinate value that the respective coordinate value of winding threedimensional model image is different is marked.
It according to one embodiment of present invention, after step s4 further include step S5: according to comparison situation and label feelings
Condition forms winding deformation diagnosis report, and is exported with document form.
According to one embodiment of present invention, the transformer be the same core transformer of oil immersed type, in include high-pressure side around
Group and low-pressure side winding.
According to one embodiment of present invention, using the winding for the method measuring transformer low-pressure side winding for passing through oil duct away from
From: incidence wave passes through the transformer oil between transformer case and high-voltage winding first, later between the oil duct of crossing high-pressure winding
Gap, to reach low pressure winding surface.
The present invention also provides a kind of online three-dimensional imagings of transformer winding ultrasonic wave to monitor system, comprising:
Acquisition module, to obtain different winding measured points test when the ultrasonic wave incidence wave and back wave when
Between it is poor；
Apart from conversion module, according to the incidence wave of the ultrasonic wave and the time difference of back wave and transmitting probe and to connect
The position for receiving probe calculates winding distance, and measured point position is converted to transformer winding model coordinate according to winding distance
Coordinate value under system, wherein using the distance of the transformer case at transmitting probe to winding measured point as measured point in an axis
On coordinate value, in addition the coordinate value on two axis is true according to the relative position between transmitting probe, transformer case and winding
It is fixed；
3-D image generation module is generated to obtain the D coordinates value of multiple measured points according to each D coordinates value
One transformer winding 3-D image；
Deformation analysis module, to by transformer winding 3-D image and the transformer winding three-dimensional model diagram that pre-establishes
As comparing, to determine whether transformer winding deforms, the transformer winding threedimensional model image is established in transformer winding mould
Under type coordinate system.
According to one embodiment of present invention, the deformation analysis module is also to the transformer winding 3-D image
In the measured point coordinate value different from the respective coordinate value of transformer winding threedimensional model image be marked.
It according to one embodiment of present invention, further include report export module, to according to comparison situation and label situation
Winding deformation diagnosis report is formed, and is exported with document form.
After adopting the above technical scheme, the present invention is had the advantages that compared with prior art based on super in liquid
Sound ranging technology realizes the live detection with core type transformer, by transformer winding detect in the ultrasonic signal that obtains into
Row distance conversion quantifies winding deformation with distance, and distance is mapped under three-dimensional coordinate, raw according to the coordinate value of each measured point
At transformer winding 3-D image, winding deformation situation can be intuitively observed, which is the winding using measurement
Distance building, the winding when deformation occurs for winding can be used as transformer winding threedimensional model apart from corresponding 3-D image
Image, to can know at a glance when transformer winding 3-D image and transformer winding threedimensional model image compare
Winding deformation position and degree are realized and are monitored on-line to transformer winding, and can be quantified, visual inspection and analysis.
Detailed description of the invention
Fig. 1 is the flow diagram of the online three-dimensional imaging monitoring method of transformer winding ultrasonic wave of the embodiment of the present invention；
Schematic diagram when Fig. 2 is the transformer winding ultrasound examination of one embodiment of the invention；
Schematic diagram when Fig. 3 is the transformer winding ultrasound examination of another embodiment of the present invention；
Fig. 4 is the simulation health winding 3-D image of the embodiment of the present invention；
Fig. 5 is that the simulation of the embodiment of the present invention deforms winding 3-D image；
Fig. 6 is the analogue transformer winding deformation situation Three Dimensional Contrast figure of the embodiment of the present invention；
Fig. 7 is the real time 3-D image of the transformer winding of the embodiment of the present invention；
Fig. 8 is the deformation Three Dimensional Contrast figure of the transformer winding of the embodiment of the present invention.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention.But the present invention can be with
Much it is different from other way described herein to implement, those skilled in the art can be without prejudice to intension of the present invention the case where
Under do similar popularization, therefore the present invention is not limited to the specific embodiments disclosed below.
The present invention proposes a kind of online three-dimensional imaging monitoring method of transformer winding ultrasonic wave, comprising the following steps:
S1: arranging the transmitting probe and receiving transducer of ultrasonic wave on transformer case, and enters ultrasonic wave transmitting and connect
The working condition of receipts, so that ultrasonic wave is reflected in winding measured point；
S2: it is calculated according to the position of ultrasonic wave transmitting and the received time difference, velocity of wave and transmitting probe and receiving transducer
Measured point position is converted to the coordinate value under transformer winding model coordinate system according to winding distance by winding distance, wherein will
Transformer case at transmitting probe to winding measured point coordinate value of the distance as measured point on an axis, in addition on two axis
Coordinate value determined according to the relative position between transmitting probe, transformer case and winding；
S3: obtaining the D coordinates value of multiple measured points, generates a transformer winding three-dimensional figure according to each D coordinates value
Picture；
S4: transformer winding 3-D image and the transformer winding threedimensional model image pre-established are compared, with determination
Whether transformer winding deforms, and the transformer winding threedimensional model image is established under transformer winding model coordinate system.
The generation of ultrasonic wave, transmitting, reception mode can be corresponding manner in the prior art, and ultrasonic wave is in transformer
Velocity of wave can be obtained ahead of time, and can accordingly be adjusted according to environmental condition change in transformer (temperature), time set can be used
Timing is carried out to the propagation of wave.
During using supercritical ultrasonics technology measuring transformer winding deformation, due to transformer winding and non-straight plane, hair
Penetrate probe and the position of receiving transducer Bu Tong then the calculation of winding distance is different, therefore can be divided into three kinds it is different
Measure situation.When incidence wave (ultrasonic wave) vertical incidence, i.e. the tangent plane normal of the direction of propagation of incidence wave and winding measured point
When parallel, the at this moment transmitting of ultrasonic wave and it is received as optimal situation.The propagation path of back wave and incidence wave is basic at this time
Unanimously.As long as ultrasonic wave receiving transducer is placed in and receives back wave next to the position of transmitting probe.If entered
Ejected wave is non-normal incidence, then has certain angle between incidence wave and the tangent plane normal of winding measured point, and reflection surpasses
Sound wave is not along backtracking, then the riding position of receiving transducer is needed by more complicated calculating.It is divided into hair again at this time
It penetrates probe and receiving transducer is placed in two kinds of situations of transformer case similar face or different surfaces and considers, in winding distance, hair
Transformer case at probe is penetrated to the distance of winding measured point according to the propagation distance of incidence wave and back wave, angle and winding
It is determined with the spatial relationship of transformer case.
If the direction of propagation of incidence wave is vertical with the tangent plane of winding measured point, ultrasonic wave transmitting probe and ultrasonic wave are received
Probe arrangement is at the same position of transformer case, then calculation are as follows: sets spread speed of the ultrasonic wave in transformer oil
For known quantity v, it is t that ultrasonic wave propagates round-trip required time between transformer case surface and winding surface, then has
In formula, L is ultrasonic probe to the distance on winding surface, and the change at transmitting probe can be calculated according to (1) formula
For depressor shell the distance between to winding, which can be used as coordinate value of the measured point in Y-axis.
If it is considered that the thickness of transformer-cabinet steel plate, then (1) formula can be rewritten as
In formula, Δ L is transformer-cabinet steel plate thickness.
Referring to Fig. 2, if the direction of propagation of incidence wave and winding measured point tangent plane out of plumb, and transmitting probe and receiving is visited
Head is arranged in the different location of transformer case similar face.In Fig. 2, transmitting probe is placed at A, receiving transducer is placed in B '
Place, the winding center of circle are O, and winding measured point is C, and OO ' is vertical line of the winding center of circle to the transformer case at transmitting probe,
O ' is that accordingly vertical point, O " are the intersection point of the vertical line and winding outer surface, and OO " ' is the winding center of circle to far from the change at transmitting probe
The vertical line of depressor shell (being the right face in figure), O " ' are that accordingly vertical point, incident propagation path are AC, reflect propagation path
For CB '.If shortest distance O " O ' of the transformer winding outer surface away from transformer case lower surface is x；If the circle of transformer winding
Distance OO " ' of the heart O away from face on the right of transformer case is y；Transformer winding radius is R；Enable O ' A be z, i.e., transmitting probe away from around
The distance in the group center of circle is z, ignores transformer case thickness, then ultrasonic wave passes through transformer case by transmitting probe vertical incidence,
Winding surface is reached by transformer oil to reflect, and returns to receiving transducer along CB '.The geometry derivation of ultrasonic wave route of transmission
It is as follows.
Because O ' A is z it is known that and O " O ' is x, OO " ' is y, transformer winding radius is known to R in figure.Then have
AC=R+x-Rcos θ (4)
θ1And θ2For the half of incidence wave and the angle of back wave, θ3For the folder of winding measured point C tangent plane normal and OO '
Angle, θ are intermediate variable.
Then distance is between receiving transducer and transmitting probe
AB '=tan (θ1+θ2) AC=tan (2 θ) AC (5)
Then receiving transducer is with winding circle center distance
O ' B '=z+tan (2 θ) (R+x-Rcos θ) (6)
It is assured that receiving transducer when transmitting probe and receiving transducer are placed in transformer case similar face in this way
Position.
Referring to Fig. 3, if incident direction of wave travel is with winding measured point tangent plane out of plumb, and transmitting probe and reception are visited
Head is arranged in transformer case different surfaces (being lower surface and right surface in figure).In Fig. 3, transmitting probe is placed at A, is received
Probe is placed at B, and the winding center of circle is O, and winding measured point is C, and OO ' is the winding center of circle to outside the transformer at transmitting probe
The vertical line of shell, O ' are that accordingly vertical point, O " are the intersection point of the vertical line and winding outer surface, and OO " ' is that the winding center of circle is visited to far from transmitting
The vertical line of transformer case (being the right face in figure) at head, O " ' are that accordingly vertical point, incident propagation path are AC, back wave
Propagation path is CB.If shortest distance O " O ' of the transformer winding outer surface away from transformer case lower surface is x；If transformer around
Group shortest distance O " O ' of the outer surface away from transformer case lower surface is x；If the center of circle O of transformer winding is away from the transformer case right side
The distance OO " ' in side face is y；Transformer winding radius is R；Enabling O ' A is z, i.e., distance of the transmitting probe away from the winding center of circle is z, suddenly
Slightly transformer case thickness, then ultrasonic wave passes through transformer case by transmitting probe vertical incidence, by transformer oil reach around
Group surface is reflected, and returns to receiving transducer along CB.The geometry derivation of ultrasonic wave route of transmission is as follows.
Because O ' A is z it is known that and O " O ' is x, OO " ' is y, transformer winding radius is known to R in figure.Then have
θ1=θ2=θ3=θ (7)
AC=R+x-Rcos θ (9)
The propagation path of ultrasonic echo is extended on transformer case outer surface identical with placement transmitting probe
The place B ', then have
AD=tan (θ1+θ2) AC=tan (2 θ) AC (10)
Δ ACD and Δ EBD is similar triangles, then has
And then bring known quantity in formula 11 into, it can obtain
Position B in formula (13) is exactly the riding position of receiving transducer, and BE is exactly receiving transducer and two outer surface of transformer
The distance between intersection.It is assured that when transmitting probe is placed in transformer case similar face with receiving transducer and connects in this way
Receive the position of probe.
A wherein coordinate value in the coordinate value in one embodiment, other two axis is transmitting probe away from central point
Distance, the central point be winding the center of circle to close transmitting probe transformer case vertical line vertical point.
Specifically, in transformer winding model coordinate system, through the transformation at the transmitting probe that transformation resolution obtains
Distance coordinate as measured point on Y-axis of the device shell to winding measured point, distance O ' A of the transmitting probe away from winding central point
Can be used as coordinate of the measured point in X-axis, central point be winding the center of circle to close transmitting probe transformer case vertical line
Vertical point, transmitting probe can be used as coordinate of the winding measured point on Z axis away from the vertical range of transformer case bottom surface.To obtain
Coordinate of the winding measured point in three axial directions of transformer winding model coordinate system is obtained, can be drawn out and be passed through using this coordinate
The transformer winding 3-D image that supercritical ultrasonics technology detects.
In one embodiment, in step s 4, to three-dimensional with transformer winding in the transformer winding 3-D image
The different measured point coordinate value of the respective coordinate value of model image is marked.Fig. 4 is to simulate healthy winding 3-D image, as
Transformer winding threedimensional model image.When deformation occurs for winding, the transformer winding 3-D image of generation is as shown in Figure 5.
Comparison diagram 4 and Fig. 5, when deformation occurs for transformer winding, the transformer winding 3-D image of generation will occur
Significant change, the part that evagination deformation occurs for winding are rendered as convex in the picture, or can further mark as other
The different color in part, as the increase color of winding deformation quantity gradually changes more.Correspondingly, indent deformation occurs in image
Part be rendered as in the picture recessed, or equally can further mark the color different for other parts, color with
Deformation quantity increase and gradually change more.Further, it is also possible to clearly see the change of winding by the rotation to 3-D image
Shape situation.
After generating 3-D image, winding deformation situation can also be analyzed.Fig. 4 and Fig. 5 are compared and analyzed, it can be with
Deformation of transformer winding situation comparison diagram is generated, as shown in Figure 6.Flat part represents the corresponding position of transformer winding in image
In normal condition.The part of evagination deformation occurs for winding in convex, can also be with the increasing of winding deformation quantity if there is color mark
Big color gradually deepens；And the part of indent deformation occurs in recessed, color gradually becomes shallower as deformation quantity increases.So as to
By color mark, the deformation position and deformation severity of transformer winding are intuitively told.In addition, system can also be to sit
Target form reflects the deformation size of each measured point of transformer winding, to realize quantitative point to deformation of transformer winding
Analysis, as shown in Figure 6.
Transformer can be the same core transformer of oil immersed type, and interior includes high-pressure side winding and low-pressure side winding.Using passing through
The winding distance of the method measuring transformer low-pressure side winding of oil duct: incidence wave pass through first transformer case and high-voltage winding it
Between transformer oil, the gallery space of crossing high-pressure winding later, to reach low pressure winding surface.
In a specific embodiment, to Shanghai City area, Pudong SBH15-M-400/10 type oil-immersed power transformer
High-voltage winding side carried out live electrification on-line testing.Before test, modeled according to the structural drawings of the transformer, in advance
The placement scheme of ultrasonic probe has been determined, and has had the part of reinforcing rib on oil tank of transformer surface, according to the actual situation to super
The riding position of sonic probe is optimized and is adjusted.When test, the ultrasonic wave-coupled agent of CG-98 type glycerol is selected, by ultrasonic wave
Uniform coupling agent is applied to the air gap on ultrasonic probe to eliminate probe Yu transformation wall.By ultrasonic probe with around
Group upper end is that initial position slowly moves down at equal intervals along the longitudinal direction, and one interval of every movement carries out one-shot measurement, until
A line has been surveyed along longitudinal direction, then ultrasonic probe is translated to an interval in the horizontal direction, then downward from winding upper end along longitudinal direction
The slowly complete longitudinal each point of mobile and point-to-point measurement, and so on, ultrasonic probe has swept high-voltage winding all surfaces, can be obtained height
Press winding surface each point with respect to the data of tank body of oil tank surface distance.These sampled datas are by host computer at transfer algorithm
Manage can get coordinate of the measured point in three axial directions of transformer winding model coordinate system, wherein ordinate be winding measured point away from
The distance of transformer case at transmitting probe, as shown in table 1.
1 transformer winding state measurement data of table
Seen from table 1, high-voltage winding test is carried out to oil-immersed transformer, actual test error is differentiated in millimeter rank
Ability is very high, and has higher accuracy.Winding real-time status can be detected with accurate.It can according to above data
Transformer winding 3-D image is obtained in real time.Winding deformation situation 3-D image segment the most serious is now intercepted out, such as Fig. 7 institute
Show.As seen from Figure 8, it tests on the right side of the first circle of winding segment and evagination deformation at one, deformation quantity 1.4cm occurs.The
Indent deformation at one occurs in the middle part of two circles, deformation quantity 8mm, remaining each position is without obvious deformation situation.Above-mentioned figure shows
The deformation of transformer winding is all right, can operate normally.
Further, after step s4 further include step S5: winding deformation is formed according to comparison situation and label situation
Diagnosis report, and exported with document form.In one embodiment, first by signal (time signal, temperature needed for distance conversion
Degree signal etc.) it is saved in Excel file, Excel file is opened by the File Open module of graphic interface.Turned by distance
Scaling method converts the signal into the coordinate of measurement point, generates the real time 3-D image of transformer.Again by this image and the change prestored
Depressor mathematical model comparative analysis provides transformer distortion situation comparison diagram, and transformer winding change is provided by way of document
Shape diagnosis report, and export.
The present invention also provides a kind of online three-dimensional imagings of transformer winding ultrasonic wave to monitor system, comprising: acquisition module is used
To obtain the incidence wave of the ultrasonic wave when test of different winding measured points and the time difference of back wave；Apart from conversion module,
To be calculated according to the position of the incidence wave of the ultrasonic wave and the time difference of back wave and transmitting probe and receiving transducer
Measured point position is converted to the coordinate value under transformer winding model coordinate system according to winding distance by winding distance, wherein will
Transformer case at transmitting probe to winding measured point coordinate value of the distance as measured point on an axis, in addition on two axis
Coordinate value determined according to the relative position between transmitting probe, transformer case and winding；3-D image generation module is used
To obtain the D coordinates value of multiple measured points, a transformer winding 3-D image is generated according to each D coordinates value；Deformation point
Module is analysed, to compare transformer winding 3-D image and the transformer winding threedimensional model image pre-established, with determination
Whether transformer winding deforms, and the transformer winding threedimensional model image is established under transformer winding model coordinate system.
Preferably, deformation analysis module also to in the transformer winding 3-D image with transformer winding three-dimensional mould
The different measured point coordinate value of the respective coordinate value of type image is marked.
In one embodiment, the online three-dimensional imaging monitoring system of transformer winding ultrasonic wave further includes report export mould
Block to form winding deformation diagnosis report according to comparison situation and label situation, and is exported with document form.
Particular content about the online three-dimensional imaging monitoring system of transformer winding ultrasonic wave of the present invention can be referring to the present invention
For the embodiment description of method part, details are not described herein.
Although the present invention is disclosed as above with preferred embodiment, it is not for limiting claim, any this field
Technical staff without departing from the spirit and scope of the present invention, can make possible variation and modification, therefore of the invention
Protection scope should be subject to the range that the claims in the present invention are defined.
Claims (8)
1. a kind of online three-dimensional imaging monitoring method of transformer winding ultrasonic wave, which comprises the following steps:
S1: on transformer case arrange ultrasonic wave transmitting probe and receiving transducer, and enter ultrasonic wave transmitting with it is received
Working condition, so that ultrasonic wave is reflected in winding measured point；
S2: winding is calculated according to the position of ultrasonic wave transmitting and the received time difference, velocity of wave and transmitting probe and receiving transducer
Measured point position is converted to the coordinate value under transformer winding model coordinate system according to winding distance, wherein will emit by distance
Transformer case at probe is to coordinate value of the distance as measured point on an axis of winding measured point, the other seat on two axis
Scale value is determined according to the relative position between transmitting probe, transformer case and winding；Coordinate value on other two axis
In a wherein coordinate value be distance of the transmitting probe away from central point, the central point is the center of circle of winding to close transmitting probe
Transformer case vertical line vertical point；
In step S1 and S2, transmitting probe and the position of receiving transducer Bu Tong then the calculation of winding distance is not
Together, comprising:
If the direction of propagation of incidence wave is vertical with the tangent plane of winding measured point, ultrasonic wave transmitting probe and ultrasonic wave receiving transducer
It is arranged at the same position of transformer case；Then in winding distance, transformer case at transmitting probe to winding measured point
Distance be incidence wave propagation distance；
If the direction of propagation of incidence wave and winding measured point tangent plane out of plumb, and transmitting probe and receiving transducer are arranged in transformation
The different location of device shell similar face, alternatively, when incident direction of wave travel and winding measured point tangent plane out of plumb, and emit
Probe is arranged in transformer case different surfaces with receiving transducer；Then in winding distance, the transformer case at transmitting probe is arrived
The distance of winding measured point is according to the propagation distance of incidence wave and back wave, the spatial relationship of angle and winding and transformer case
It determines；
S3: obtaining the D coordinates value of multiple measured points, generates a transformer winding 3-D image according to each D coordinates value；
S4: transformer winding 3-D image and the transformer winding threedimensional model image pre-established are compared, to determine transformation
Whether device winding deforms, and the transformer winding threedimensional model image is established under transformer winding model coordinate system.
2. the online three-dimensional imaging monitoring method of transformer winding ultrasonic wave as described in claim 1, which is characterized in that in step
In S4, it is tested to different from the respective coordinate value of transformer winding threedimensional model image in the transformer winding 3-D image
Point coordinate value is marked.
3. the online three-dimensional imaging monitoring method of transformer winding ultrasonic wave as claimed in claim 2, which is characterized in that in step
Further include step S5 after S4: winding deformation diagnosis report being formed according to comparison situation and label situation, and is led with document form
Out.
4. the online three-dimensional imaging monitoring method of transformer winding ultrasonic wave as described in claim 1, which is characterized in that the change
Depressor is the same core transformer of oil immersed type, and interior includes high-pressure side winding and low-pressure side winding.
5. the online three-dimensional imaging monitoring method of transformer winding ultrasonic wave as claimed in claim 4, which is characterized in that use and wear
The more winding distance of the method measuring transformer low-pressure side winding of oil duct: incidence wave passes through transformer case and high-voltage winding first
Between transformer oil, the gallery space of crossing high-pressure winding later, to reach low pressure winding surface.
6. a kind of online three-dimensional imaging of transformer winding ultrasonic wave monitors system characterized by comprising
Acquisition module, to obtain the incidence wave of ultrasonic wave when different winding measured points are tested and the time of back wave
Difference；
Apart from conversion module, to be visited according to the incidence wave of the ultrasonic wave and the time difference of back wave and transmitting probe and reception
The position of head calculates winding distance, is converted to measured point position under transformer winding model coordinate system according to winding distance
Coordinate value, wherein using the distance of the transformer case at transmitting probe to winding measured point as measured point on an axis
Coordinate value, in addition the coordinate value on two axis is determined according to the relative position between transmitting probe, transformer case and winding；
Transmitting probe and the position of receiving transducer Bu Tong then the calculation of winding distance is different, specifically:
If the direction of propagation of incidence wave is vertical with the tangent plane of winding measured point, ultrasonic wave transmitting probe and ultrasonic wave receiving transducer
It is arranged at the same position of transformer case；Then in winding distance, transformer case at transmitting probe to winding measured point
Distance be incidence wave propagation distance；
If the direction of propagation of incidence wave and winding measured point tangent plane out of plumb, and transmitting probe and receiving transducer are arranged in transformation
The different location of device shell similar face, alternatively, when incident direction of wave travel and winding measured point tangent plane out of plumb, and emit
Probe is arranged in transformer case different surfaces with receiving transducer；Then in winding distance, the transformer case at transmitting probe is arrived
The distance of winding measured point is according to the propagation distance of incidence wave and back wave, the spatial relationship of angle and winding and transformer case
It determines；
3-D image generation module generates one according to each D coordinates value and becomes to obtain the D coordinates value of multiple measured points
Depressor winding 3-D image；
Deformation analysis module, to by transformer winding 3-D image and the transformer winding threedimensional model image ratio that pre-establishes
Right, to determine whether transformer winding deforms, the transformer winding threedimensional model image is established to be sat in transformer winding model
Under mark system.
7. the online three-dimensional imaging of transformer winding ultrasonic wave as claimed in claim 6 monitors system, which is characterized in that the change
Conformal analysis module is also to the corresponding coordinate in the transformer winding 3-D image with transformer winding threedimensional model image
It is worth different measured point coordinate values to be marked.
8. the online three-dimensional imaging of transformer winding ultrasonic wave as claimed in claim 7 monitors system, which is characterized in that further include
It reports export module, to form winding deformation diagnosis report according to comparison situation and label situation, and is exported with document form.
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| CN107907883A (en) * | 2017-09-20 | 2018-04-13 | 国网辽宁省电力有限公司检修分公司 | A kind of inside transformer structure imaging monitoring system and monitoring method |
| CN112394342B (en) * | 2020-09-18 | 2023-12-12 | 国网吉林省电力有限公司电力科学研究院 | Transformer model for testing axial and radial deformation and preparation method thereof |
| CN114111661B (en) * | 2021-11-23 | 2024-03-19 | 国网上海市电力公司 | Transformer winding deformation detection method and system |
| CN114755611B (en) * | 2022-03-10 | 2023-06-20 | 重庆科创职业学院 | Acoustic wave-based method and device for detecting turn-to-turn short circuit of oil paper insulation transformer |
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