CN108459229A - A kind of oscillation wave detection transformer angle scheme winding deformation circuit and method - Google Patents
A kind of oscillation wave detection transformer angle scheme winding deformation circuit and method Download PDFInfo
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- CN108459229A CN108459229A CN201810035913.5A CN201810035913A CN108459229A CN 108459229 A CN108459229 A CN 108459229A CN 201810035913 A CN201810035913 A CN 201810035913A CN 108459229 A CN108459229 A CN 108459229A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
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- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
This application discloses a kind of oscillation wave detection transformer angle scheme winding deformation circuit and methods, have the characteristics that test loop is simple, detection signal is strong, voltage is high and accuracy is high, suitable for the angular winding deformation fault detect of transformer, used technical solution is：Apply DC voltage successively in the three-phase head end of the secondary winding of transformer, and shorting switch is provided between DC high-voltage power supply and secondary winding, shorting switch one end is grounded, it is closed and is grounded using shorting switch, form the oscillation circuit of the leakage reactance or excitation impedance of stray capacitance and capacitance of bushing and transformer over the ground, and measure the voltage response curves of the response phase of secondary winding successively using waveform measurement analytical equipment, finally obtain the three-phase voltage response curve of secondary winding, the frequency of three-phase voltage response curve is compared in analysis, duration of oscillation, the consistency of three-phase waveform, variance and inequality judge whether transformer winding deforms.
Description
Technical field
This application involves the technical fields of winding state assessment detection, and in particular to a kind of oscillation wave detection transformer is angular
Wiring winding deformation circuit and method.
Background technology
The axially or radially change in size that Winding in Power Transformer occurs under mechanical force or electrodynamic action usually shows
For features such as winding bird caging, bulge or displacements.Transformer is collided in by short-circuit current rush or transportational process
When, it is likely to occur winding deformation phenomenon, it will directly affect the safe operation of transformer.According to statistics, 110kV and to power on
The slightly deformed Hidden fault of power transformer winding, be cause power transformer damage and the main reason for electric network fault it
One.Existing winding deformation, which predominantly detects method, method of frequency response method, impedance method, method of frequency response method measurement voltage is low, measurement result is not intuitive,
Can not rational judgment, need to be by analyzing transformer device structure, operating condition, the data such as routine test measurement result, and combine frequency response
The cross of curve, longitudinal comparison can just make comprehensive descision；Short circuit impedance method is to apply earliest deformation of transformer winding detection side
Method, but winding is slightly deformed and is not easy to find.
Invention content
In order to solve the problems in the prior art, present applicant proposes a kind of oscillation waves to detect transformer angle scheme winding
Circuit and method are deformed, has the characteristics that test loop is simple, detection signal is strong, voltage is high and accuracy is high, is suitable for transformation
The angular winding deformation fault detect of device.
In order to achieve the goal above, technical solution used by the application is：
A kind of oscillation wave detection transformer angle scheme winding deformation circuit, including DC high-voltage power supply, DC high-voltage
Source is electrically connected to a phase head end of the secondary winding of transformer, and the head end that phase is responded in the other two-phase of secondary winding is connected with wave
Shape measurement analysis device, secondary winding are angular winding；Shorting switch, short circuit are provided between DC high-voltage power supply and secondary winding
Switch one end is electrically connected between DC high-voltage power supply and secondary winding, other end ground connection；In every phase of the first winding of transformer
It is both provided with capacitance of bushing, capacitance of bushing ground connection；Several stray capacitances over the ground are both provided in every phase of secondary winding, it is miscellaneous over the ground
Spurious capacitance is grounded；DC high-voltage power supply is sequentially connected the three-phase head end of secondary winding when detection, is closed shorting switch, is formed over the ground
The oscillation circuit of the leakage reactance or excitation impedance of stray capacitance and capacitance of bushing and transformer, waveform measurement analytical equipment measure successively
The voltage response curves of the response phase of secondary winding obtain the three-phase voltage response curve of secondary winding, are rung according to three-phase voltage
Curve is answered to judge whether transformer winding deforms.
If a phase head ends of the DC high-voltage power supply electrical connection secondary winding, the connection of waveform measurement analytical equipment are secondary
The c phase head ends of winding；If DC high-voltage power supply is electrically connected the b phase head ends of secondary winding, waveform measurement analytical equipment connection two
The a phase head ends of secondary winding；If DC high-voltage power supply is electrically connected the c phase head ends of secondary winding, the connection of waveform measurement analytical equipment
The b phase head ends of secondary winding.
The first winding of the transformer is star winding, and the three-phase head end of star winding is become by short circuit conducting wire short circuit
The three-phase neutral point of the first winding of depressor is grounded by earth lead.
The waveform measurement analytical equipment is connected with divider, and divider connects the head end of the response phase of secondary winding, point
Depressor is grounded.
The divider includes the first derided capacitors and the second derided capacitors being sequentially connected in series, and the first derided capacitors are connected to
The head end of the response phase of secondary winding, one end ground connection of the second derided capacitors, waveform measurement analytical equipment are connected to the first partial pressure
Between capacitance and the second derided capacitors.
The DC high-voltage power supply includes the high voltage direct current generator being connect with power supply, and high voltage direct current generator is grounded, directly
Stream high pressure generator be connected to transformer secondary winding a phase head end, shorting switch one end be electrically connected to high pressure generator with
Between secondary winding；High voltage direct current generator connects 220V AC powers, and protection is arranged between high voltage direct current generator and shorting switch
Resistance.
A kind of oscillation wave detection transformer angle scheme winding deformation method, includes the following steps：
DC high-voltage power supply is electrically connected to a phase head end of the secondary winding of transformer first, and waveform measurement analytical equipment connects
Be connected in the other two-phase of secondary winding respond phase head end, shorting switch one end be electrically connected to DC high-voltage power supply with it is secondary around
Between group, other end ground connection；
Then DC voltage is applied to the three-phase head end of secondary winding successively by DC high-voltage power supply, controls shorting switch
It is closed, forms the oscillation circuit of the leakage reactance or excitation impedance of stray capacitance and capacitance of bushing and transformer over the ground, waveform measurement point
Analysis apparatus measures the voltage response curves of the response phase of secondary winding successively, and the three-phase voltage response for finally obtaining secondary winding is bent
Line；
Finally according to the three-phase voltage response curve of the secondary winding of acquisition, analyze three-phase voltage response curve frequency,
Duration of oscillation, the consistency of three-phase waveform, variance and inequality judge whether transformer winding deforms.
If DC high-voltage power supply applies DC voltage, waveform measurement point to a phase head ends of secondary winding in the method
Analysis apparatus measures voltage response curves in the c phase head ends of secondary winding；If DC high-voltage power supply is applied to the b phase head ends of secondary winding
Add DC voltage, then waveform measurement analytical equipment measures voltage response curves in a phase head ends of secondary winding；If DC high-voltage
Source applies DC voltage to the c phase head ends of secondary winding, then waveform measurement analytical equipment measures electricity in the b phase head ends of secondary winding
Press response curve.
The three-phase head end of the first winding of transformer is by short circuit conducting wire short circuit in the method, if forming stray electrical over the ground
Hold and the oscillation circuit of the leakage reactance of capacitance of bushing and transformer, the three-phase neutral point of first winding are grounded by earth lead.
The oscillation circuit of the leakage reactance or excitation impedance of stray capacitance and capacitance of bushing and transformer over the ground in the method
When vibrating the wave duration less than 3 periods, the divider that waveform measurement analytical equipment passes through high capacitance connects secondary winding
Response phase head end.
Compared with prior art, the application applies DC voltage successively in the three-phase head end of the secondary winding of transformer, and
Shorting switch is provided between DC high-voltage power supply and secondary winding, shorting switch one end ground connection is connect using shorting switch closure
Ground is formed the oscillation circuit of the leakage reactance or excitation impedance of stray capacitance and capacitance of bushing and transformer over the ground, and is surveyed using waveform
Amount analytical equipment measures the voltage response curves of the response phase of secondary winding successively, and the three-phase voltage for finally obtaining secondary winding is rung
Curve is answered, it is angular winding to be limited to secondary winding, applies DC voltage to the three-phase head end of secondary winding respectively, and measure respectively
The voltage response curves of the response phase of secondary winding, finally synthesize the three-phase voltage response curve of secondary winding, and analysis is compared
Whether frequency, duration of oscillation, the consistency of three-phase waveform, variance and the inequality of three-phase voltage response curve judge transformer winding
Deformation has the characteristics that test loop is simple, detection signal is strong, voltage is high and accuracy is high, is suitable for the angular winding of transformer
Deform fault detect.
Description of the drawings
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other drawings may also be obtained based on these drawings.
Fig. 1 is the circuit electrical schematic diagram of the application；
Fig. 2 is the detection method flow chart of the application；
Wherein, 1- high voltage direct current generators, 2- waveform measurements analytical equipment, 3- divider, 4- earth leads, 5- once around
Group, 6- short circuits conducting wire, 7- transformers, R are protective resistance, K1For shorting switch, C0For capacitance of bushing, C1For stray capacitance over the ground,
LmFor secondary winding, C11For the first derided capacitors, C12For the second derided capacitors.
Specific implementation mode
The application is further explained with reference to specific embodiment and Figure of description.
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application
Example, and the principle together with specification for explaining the application.
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without having to pay creative labor, other drawings may also be obtained based on these drawings.
Referring to Fig. 1, the application circuit includes DC high-voltage power supply, and DC high-voltage power supply is electrically connected to the secondary of transformer 7
Winding LmA phase head end, secondary winding LmOther two-phase in the head end of response phase be connected with waveform measurement analytical equipment 2, two
Secondary winding LmFor angular winding；DC high-voltage power supply and secondary winding LmBetween be provided with shorting switch K1, shorting switch K1One end electricity
It is connected to DC high-voltage power supply and secondary winding LmBetween, other end ground connection；It is respectively provided in every phase of the first winding 5 of transformer 7
There is capacitance of bushing C0, capacitance of bushing C0Ground connection；Secondary winding LmEvery phase on be both provided with several stray capacitance C over the ground1, over the ground
Stray capacitance C1Ground connection；DC high-voltage power supply is sequentially connected secondary winding L when detectionmThree-phase head end, be closed shorting switch K1,
Form stray capacitance C over the ground1With capacitance of bushing C0With the leakage reactance of transformer 7 or the oscillation circuit of excitation impedance, waveform measurement analysis
Device 2 measures secondary winding L successivelymResponse phase voltage response curves, obtain secondary winding LmThree-phase voltage response it is bent
Line judges whether transformer winding deforms according to three-phase voltage response curve.Waveform measurement analytical equipment 2 can be oscillograph,
Can also be other can obtain the instrument or equipment of wavy curve.
If DC high-voltage power supply is electrically connected secondary winding LmA phase head ends, then waveform measurement analytical equipment 2 connect it is secondary around
Group LmC phase head ends；If DC high-voltage power supply is electrically connected secondary winding LmB phase head ends, then waveform measurement analytical equipment 2 connect
Secondary winding LmA phase head ends；If DC high-voltage power supply is electrically connected secondary winding LmC phase head ends, then waveform measurement analytical equipment
2 connection secondary winding LmB phase head ends.
The first winding 5 of transformer 7 is star winding, and the three-phase head end of star winding is by 6 short circuit of short circuit conducting wire, if shape
Stray capacitance C in couples1With capacitance of bushing C0It is logical with the three-phase neutral point of the oscillation circuit of the leakage reactance of transformer 7, first winding 5
Cross the ground connection of earth lead 4.
If stray capacitance C over the ground1With capacitance of bushing C0The oscillation circuit formed with the leakage reactance or excitation impedance of transformer 7
Vibrate the wave duration be less than 3 periods when, waveform measurement analytical equipment 2 by the divider 3 of high capacitance connect it is secondary around
Group LmResponse phase head end.
Divider 3 includes the first derided capacitors C being sequentially connected in series11With the second derided capacitors C12, the first derided capacitors C11Even
It is connected to secondary winding LmResponse phase head end, the second derided capacitors C12One end ground connection, waveform measurement analytical equipment 2 is connected to
First derided capacitors C11With the second derided capacitors C12Between.
Ground is advanced optimized, DC high-voltage power supply includes the high voltage direct current generator 1 being connect with power supply, and high direct voltage occurs
Device 1 is grounded, and high voltage direct current generator 1 is connected to the secondary winding L of transformer 7mA phase head end, shorting switch K1One end is electrically connected
It is connected to high pressure generator 1 and secondary winding LmBetween；High voltage direct current generator 1 connects 220V AC powers, high voltage direct current generator 1
With shorting switch K1Between setting protective resistance R.
The application is utilizing transformer winding leakage reactance or excitation impedance and condenser bushing and winding stray capacitance structure over the ground
On the basis of ferromagnetic oscillation test winding deformation principle, apply respectively per phase head end in angular winding A, B, C three-phase of transformer
By its rapid ground connection after DC voltage, the C phases, A phases, B phases of angular winding head end are measured successively by waveform measurement analytical equipment
Voltage responsive waveform, carry out analysis the angular winding of multilevel iudge transformer whether deform, circuit by high voltage direct current generator,
Protective resistance, shorting switch, waveform measurement analytical equipment and divider 5 are constituted, and waveform measurement analytical equipment obtains angular successively
The voltage responsive waveform of winding three-phase, the frequency of comparative analysis three-phase voltage response curve, duration of oscillation, three-phase waveform it is consistent
Property, variance, inequality etc. judge whether transformer winding deforms, have that test loop is simple, detection signal is strong, voltage is high and accurate
High feature is spent, the angular winding deformation fault detect of transformer is suitable for.
Embodiment 1：
Referring to Fig. 1, the application circuit includes the high voltage direct current generator 1 being connect with 220V AC powers, high direct voltage hair
Raw device 1 is connected to the secondary winding L of transformer 7mA, b or c phase head end, high voltage direct current generator 1 connected by protective resistance R
There is shorting switch K1, shorting switch K1One end is electrically connected to DC high-voltage power supply and secondary winding LmBetween, other end ground connection, transformation
The three-phase head end of the first winding 5 of device 7 passes through 6 short circuit of short circuit conducting wire；The secondary winding L being connect with high voltage direct current generator 1m's
Phase head end is corresponding, and waveform measurement analytical equipment 2 connects secondary winding L by divider 3mC, a or b phase head end, be closed it is short
Meet switch K1When form stray capacitance C over the ground1With capacitance of bushing C0With the oscillation circuit of the excitation impedance of transformer 7.If miscellaneous over the ground
Spurious capacitance C1With capacitance of bushing C0It is less than 3 periods with the oscillation wave duration of the oscillation circuit of the excitation impedance of transformer 7,
The big divider 3 of capacitance may be selected.
Referring to Fig. 2, detection method includes the following steps by the application：
Referring first to the connection type connecting detection circuit of embodiment 1；High voltage direct current generator 1 is connected to transformer 7
Secondary winding LmA, b or c phase head end, accordingly waveform measurement analytical equipment 2 pass through divider 3 and connect secondary winding LmC, a
Or b phase head ends；
Then by high voltage direct current generator 1 to secondary winding LmA phase head ends apply DC voltage, control shorting switch
K1It is closed, forms stray capacitance C over the ground1With capacitance of bushing C0With the oscillation circuit of the excitation impedance of transformer 7, waveform measurement point
Analysis apparatus 2 measures secondary winding LmC phases voltage response curves；Above step is repeated after detection, high direct voltage occurs
Device 1 is to secondary winding LmB phase head ends apply DC voltage, waveform measurement analytical equipment 2 measures secondary winding LmA phases electricity
Press response curve；Above step is repeated after detection, high voltage direct current generator 1 is to secondary winding LmC phase head ends apply it is straight
Galvanic electricity pressure, waveform measurement analytical equipment 2 measure secondary winding LmB phases voltage response curves, finally obtain secondary winding Lm's
A, the voltage response curves of b and c phases；
Finally according to secondary winding LmThree-phase voltage response curve, the frequency of comparative analysis three-phase voltage response curve,
Duration of oscillation, the consistency of three-phase waveform, variance, inequality etc. judge whether transformer winding deforms.
Embodiment 2：
Referring to Fig. 1, the application circuit includes the high voltage direct current generator 1 being connect with 220V AC powers, high direct voltage hair
Raw device 1 is connected to the secondary winding L of transformer 7mA, b or c phase head end, high voltage direct current generator 1 connected by protective resistance R
There is shorting switch K1, shorting switch K1One end is electrically connected to DC high-voltage power supply and secondary winding LmBetween, other end ground connection, transformation
The three-phase head end of the first winding 5 of device 7 passes through earth lead 4 by 6 short circuit of short circuit conducting wire, the three-phase neutral point of first winding 5
Ground connection；The secondary winding L being connect with high voltage direct current generator 1mPhase head end it is corresponding, waveform measurement analytical equipment 2 by point
Depressor 3 connects secondary winding LmC, a or b phase head end, be closed shorting switch K1When form stray capacitance C over the ground1And capacitance of bushing
C0With the oscillation circuit of the leakage reactance of transformer 7.If stray capacitance C over the ground1With capacitance of bushing C0With the oscillation of the leakage reactance of transformer 7
The oscillation wave duration in circuit is less than 3 periods, and the big divider 3 of capacitance may be selected.
Referring to Fig. 2, detection method includes the following steps by the application：
Referring first to the connection type connecting detection circuit of embodiment 1；High voltage direct current generator 1 is connected to transformer 7
Secondary winding LmA, b or c phase head end, accordingly waveform measurement analytical equipment 2 pass through divider 3 and connect secondary winding LmC, a
Or b phase head ends；
Then by high voltage direct current generator 1 to secondary winding LmA phase head ends apply DC voltage, control shorting switch
K1It is closed, forms stray capacitance C over the ground1With capacitance of bushing C0With the oscillation circuit of the leakage reactance of transformer 7, waveform measurement analysis dress
Set 2 measurement secondary winding LmC phases voltage response curves；After detection repeat above step, high voltage direct current generator 1 to
Secondary winding LmB phase head ends apply DC voltage, waveform measurement analytical equipment 2 measures secondary winding LmA phases voltage responsive
Curve；Above step is repeated after detection, high voltage direct current generator 1 is to secondary winding LmC phase head ends apply DC voltage,
Waveform measurement analytical equipment 2 measures secondary winding LmB phases voltage response curves, finally obtain secondary winding LmA, b and c
The voltage response curves of phase；
Finally according to secondary winding LmThree-phase voltage response curve, the frequency of comparative analysis three-phase voltage response curve,
Duration of oscillation, the consistency of three-phase waveform, variance, inequality etc. judge whether transformer winding deforms.
The application is respectively by its rapid ground connection, waveform measurement after the angular winding of transformer applies DC voltage per phase head end
Analytical equipment measures the voltage responsive waveform of the response phase of angular winding head end successively, and carries out lateral, longitudinal frequency, width
The comparative analysis such as value, duration of oscillation, the degree of correlation, to detect deformation of transformer winding.The application is simple with test loop, examines
The features such as signal is strong, voltage is high and accuracy is high is surveyed, the angular winding deformation fault detect of transformer is suitable for.
It should be noted that the relational terms of such as " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include but also include not having so that article or equipment including a series of elements include not only those elements
The other element being expressly recited, or further include for elements inherent to such a process, method, article, or device.Do not having
There is the element limited by sentence "including a ..." in the case of more limiting, it is not excluded that in the mistake for including the element
There is also other identical elements in journey, method, article or equipment.
The above is only the specific implementation mode of the application, is made skilled artisans appreciate that or realizing this Shen
Please.Various modifications to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can in other embodiments be realized in the case where not departing from spirit herein or range.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
It should be understood that the application is not limited to the content for being described above and being shown in the accompanying drawings, and can
To carry out various modifications and change without departing from the scope.Scope of the present application is only limited by the accompanying claims.
Claims (10)
1. a kind of oscillation wave detection transformer angle scheme winding deformation circuit, which is characterized in that including DC high-voltage power supply, directly
Stream high voltage power supply is electrically connected to the secondary winding (L of transformer (7)m) a phase head end, secondary winding (Lm) other two-phase in ring
The head end of phase is answered to be connected with waveform measurement analytical equipment (2), secondary winding (Lm) it is angular winding；DC high-voltage power supply with it is secondary
Winding (Lm) between be provided with shorting switch (K1), shorting switch (K1) one end is electrically connected to DC high-voltage power supply and secondary winding
(Lm) between, other end ground connection；It is both provided with capacitance of bushing (C in every phase of the first winding (5) of transformer (7)0), capacitance of bushing
(C0) ground connection；Secondary winding (Lm) every phase on be both provided with several stray capacitance (C over the ground1), stray capacitance (C over the ground1) connect
Ground；DC high-voltage power supply is sequentially connected secondary winding (L when detectionm) three-phase head end, be closed shorting switch (K1), it is formed over the ground
Stray capacitance (C1) and capacitance of bushing (C0) and the leakage reactance of transformer (7) or the oscillation circuit of excitation impedance, waveform measurement analysis dress
It sets (2) and measures secondary winding (L successivelym) response phase voltage response curves, obtain secondary winding (Lm) three-phase voltage response
Curve judges whether transformer winding deforms according to three-phase voltage response curve.
2. a kind of oscillation wave detection transformer angle scheme winding deformation circuit according to claim 1, which is characterized in that
If the DC high-voltage power supply electrical connection secondary winding (Lm) a phase head ends, then waveform measurement analytical equipment (2) connection it is secondary around
Group (Lm) c phase head ends；If DC high-voltage power supply is electrically connected secondary winding (Lm) b phase head ends, then waveform measurement analytical equipment
(2) connection secondary winding (Lm) a phase head ends；If DC high-voltage power supply is electrically connected secondary winding (Lm) c phase head ends, then waveform
Measurement analysis device (2) connects secondary winding (Lm) b phase head ends.
3. a kind of oscillation wave detection transformer angle scheme winding deformation circuit according to claim 1, which is characterized in that
The first winding (5) of the transformer (7) is star winding, and the three-phase head end of star winding is become by short circuit conducting wire (6) short circuit
The three-phase neutral point of the first winding (5) of depressor (7) is grounded by earth lead (4).
4. according to a kind of oscillation wave detection transformer angle scheme winding deformation of claim 1-3 any one of them circuit,
It is characterized in that, the waveform measurement analytical equipment (2) is connected with divider (3), and divider (3) connects secondary winding (Lm) sound
Answer the head end of phase, divider (3) ground connection.
5. a kind of oscillation wave detection transformer angle scheme winding deformation circuit according to claim 4, which is characterized in that
The divider (3) includes the first derided capacitors (C being sequentially connected in series11) and the second derided capacitors (C12), the first derided capacitors
(C11) it is connected to secondary winding (Lm) response phase head end, the second derided capacitors (C12) one end ground connection, waveform measurement analysis
Device (2) is connected to the first derided capacitors (C11) and the second derided capacitors (C12) between.
6. according to a kind of oscillation wave detection transformer angle scheme winding deformation of claim 1-3 any one of them circuit,
It is characterized in that, the DC high-voltage power supply includes the high voltage direct current generator (1) being connect with power supply, high voltage direct current generator (1)
Ground connection, high voltage direct current generator (1) are connected to the secondary winding (L of transformer (7)m) a phase head end, shorting switch (K1) one end
It is electrically connected to high pressure generator (1) and secondary winding (Lm) between；High voltage direct current generator (1) connects 220V AC powers, direct current
High pressure generator (1) and shorting switch (K1) between setting protective resistance (R).
7. a kind of oscillation wave detects transformer angle scheme winding deformation method, which is characterized in that include the following steps：
DC high-voltage power supply is electrically connected to the secondary winding (L of transformer (7) firstm) a phase head end, waveform measurement analytical equipment
(2) it is connected to secondary winding (Lm) other two-phase in respond phase head end, shorting switch (K1) one end is electrically connected to high direct voltage
Power supply and secondary winding (Lm) between, other end ground connection；
Then by DC high-voltage power supply successively to secondary winding (Lm) three-phase head end apply DC voltage, control shorting switch
(K1) be closed, form stray capacitance (C over the ground1) and capacitance of bushing (C0) returned with the oscillation of the leakage reactance or excitation impedance of transformer (7)
Road, waveform measurement analytical equipment (2) measure secondary winding (L successivelym) response phase voltage response curves, finally obtain secondary
Winding (Lm) three-phase voltage response curve；
Finally according to the secondary winding (L of acquisitionm) three-phase voltage response curve, analyze three-phase voltage response curve frequency, shake
It swings time, the consistency of three-phase waveform, variance and inequality and judges whether transformer winding deforms.
8. a kind of oscillation wave according to claim 7 detects transformer angle scheme winding deformation method, which is characterized in that
If DC high-voltage power supply is to secondary winding (L in the methodm) a phase head ends apply DC voltage, then waveform measurement analysis dress
(2) are set in secondary winding (Lm) c phase head ends measure voltage response curves；If DC high-voltage power supply is to secondary winding (Lm) b phases
Head end applies DC voltage, then waveform measurement analytical equipment (2) is in secondary winding (Lm) a phase head ends to measure voltage responsive bent
Line；If DC high-voltage power supply is to secondary winding (Lm) c phase head ends apply DC voltage, then waveform measurement analytical equipment (2) exist
Secondary winding (Lm) b phase head ends measure voltage response curves.
9. a kind of oscillation wave according to claim 7 detects transformer angle scheme winding deformation method, which is characterized in that
The three-phase head end of the first winding (5) of transformer (7) is by short circuit conducting wire (6) short circuit in the method, if being formed spuious over the ground
Capacitance (C1) and capacitance of bushing (C0) oscillation circuit with the leakage reactance of transformer (7), the three-phase neutral point of first winding (5) passes through
Earth lead (4) is grounded.
10. a kind of oscillation wave according to claim 7 detects transformer angle scheme winding deformation method, feature exists
In stray capacitance (C over the ground in the method1) and capacitance of bushing (C0) returned with the oscillation of the leakage reactance or excitation impedance of transformer (7)
When the oscillation wave duration on road is less than 3 periods, waveform measurement analytical equipment (2) is connected by the divider (3) of high capacitance
Meet secondary winding (Lm) response phase head end.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810035913.5A CN108459229A (en) | 2018-01-15 | 2018-01-15 | A kind of oscillation wave detection transformer angle scheme winding deformation circuit and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810035913.5A CN108459229A (en) | 2018-01-15 | 2018-01-15 | A kind of oscillation wave detection transformer angle scheme winding deformation circuit and method |
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| CN108459229A true CN108459229A (en) | 2018-08-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361610A (en) * | 2019-06-23 | 2019-10-22 | 西南交通大学 | Transformer winding radial deformation test macro and its test appraisal procedure |
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