CN106443200A - 1000kV ultra-high voltage CVT(constant-voltage transformer) disposable wiring automatic testing device and method - Google Patents
1000kV ultra-high voltage CVT(constant-voltage transformer) disposable wiring automatic testing device and method Download PDFInfo
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- CN106443200A CN106443200A CN201610906484.5A CN201610906484A CN106443200A CN 106443200 A CN106443200 A CN 106443200A CN 201610906484 A CN201610906484 A CN 201610906484A CN 106443200 A CN106443200 A CN 106443200A
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- electric capacity
- cvt
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- high pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2605—Measuring capacitance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor
- G01R27/2694—Measuring dielectric loss, e.g. loss angle, loss factor or power factor
Abstract
The invention discloses 1000kV ultra-high voltage CVT (constant-voltage transformer) disposable wiring automatic testing device and method. The 1000kV ultra-high voltage CVT disposable wiring automatic testing device comprises five wiring points including a wiring point a, a wiring point b, a wiring point c, a wiring point d and a wiring point & and six measurement interfaces including a first high-voltage sampling interface GX1 connected with the point a, a second low-voltage sampling interface CX2 connected with the point b, a second high-voltage sampling interface GX2 connected with the point c, a first low-voltage sampling interface CX1 connected with the point d, a CVT self-excitation high-voltage special interface CVT-HV connected with the point & and a CVT self-excitation low-voltage output interface CVT-LV connected with a group of voltage reduction coils of a secondary coil of a first transformer in a CVT circuit respectively. According to the 1000kV ultra-high voltage CVT disposable wiring automatic testing device, through effective function integration, disposable wiring and disposable measurement are realized, the working efficiency is improved, the labor intensity is lowered, and the testing time is effectively shortened.
Description
Technical field
The present invention is the detection means of electric capacity and dielectric loss value, and in particular to a kind of disposable wiring of 1000kV extra-high voltage CVT
Automatic testing equipment and method.
Background technology
The electrical principle wiring diagram of traditional 1000kVCVT test, as shown in figure 1, C will be measured11, C12, C13, C14, C15With C2
Electric capacity and dielectric loss value, in C11, C12, C13, C14, C15Wiring point between two electric capacity is respectively a, b, c, d, C in order2End
Wiring point is ＆, and in the case of inner high voltage internal standard is used, only two measurement interfaces, are high pressure Sampling Interface GX respectively1And
Low pressure Sampling Interface CX1, C in the case of busbar grounding11Tested with reversal connection high-tension shielding method, C12, C13, C14Positive connection is used respectively,
C15With C2Tested with CVT self-excitation method.Measuring circuit filters interference using Fourier transform, isolates signal fundamental wave, to standard electric
Stream and test product electric current carry out vector calculus, that is, the voltage amplitude of the measurement for being collected by current acquisition plate and standard channel
Value is compared and calculates capacitance, passes through the phase difference calculating tg δ-value of two gathered passages.Due to filtering interfering, separate
Go out fundamental signal so the interference free performance in live application process is excellent, data accurate stable.But wiring, test will be in five times
Complete, connection times are many, pendulous frequency is many, time-consuming many, workload is big, and efficiency is low, and test period is long.
Content of the invention
For the problems referred to above, the present invention proposes a kind of disposable wiring, can just complete what all electric capacity and dielectric loss value were measured
1000kV extra-high voltage CVT disposably measures automatic testing equipment and method.
Above-mentioned technical purpose is realized, above-mentioned technique effect is reached, the present invention is achieved through the following technical solutions：
A kind of disposable wiring automatic testing equipment of 1000kV extra-high voltage CVT, including CVT circuit and test circuit, which is special
Levy and be：The first electric capacity C11 that the CVT circuit includes to be sequentially connected with, the second electric capacity C12, the 3rd electric capacity C13, the 4th electric capacity
C14, the 5th electric capacity C15, are equipped with wiring point, respectively tetra- wiring points of a, b, c, d, wiring point d between two neighboring electric capacity
With b respectively with the first low pressure Sampling Interface CX1With the second low pressure Sampling Interface CX2It is connected, CVT circuit also includes the 6th electric capacity C2
With the first transformator, one end of the 6th electric capacity C2 is connected with the 5th electric capacity C15, and the other end is provided with wiring point ＆, the 5th electric capacity C15
And the 6th be provided with wiring point e between electric capacity C2, the two ends of the primary coil of the first transformator are connected with wiring point e and ground respectively；
The test circuit includes the second transformator, standard capacitance CN, the second transformator include armature winding, boosting winding, blood pressure lowering around
Group, boosting winding is by the first relay S1, the 6th relay S10 and the second high pressure Sampling Interface GX2It is connected with wiring c point,
First relay S1 is connected with the second relay S2 also by wire, and the outfan of the second relay S2 is connected with standard capacitance letter
Number acquisition channel, the two ends of standard capacitance CN are connected with the 3rd relay S3 and the second relay S2 respectively；3rd relay
One of outfan of device S3 passes through the 4th relay S4 and the first high pressure Sampling Interface GX1It is connected with wiring a point, another
Outfan is connected with wiring point ＆ with CVT self-excitation high pressure special purpose interface CVT-HV by the 5th relay S5；Blood pressure lowering winding is by the
Seven relay S11 are connected with the one of which blood pressure lowering secondary coil of the first transformator with CVT self-excitation low pressure output interface CVT-LV.
A kind of disposable wiring automatic testing equipment of described 1000kV extra-high voltage CVT, also includes outer panels, described first
Low pressure Sampling Interface CX1, the second low pressure Sampling Interface CX2, the first high pressure Sampling Interface GX1, the second high pressure Sampling Interface GX2、
CVT self-excitation high pressure special purpose interface CVT-HV, CVT self-excitation low pressure output interface CVT-LV is arranged in outer panels, is respectively used to
It is connected with test item and is tested.
Second transformator is high-tension transformer.
The boosting winding of second transformator is used for boost in voltage to 0-10KV；Blood pressure lowering winding is used for voltage step-down
To 0-50V.
The first relay S1, the second relay S2, the 3rd relay S3, the 4th relay S4, the 5th relay S5,
6th relay S10 and the 7th relay S11 are high pressure vacuum relay.
One of input electrode ground connection of the 6th relay S10；One of input electricity of the 7th relay S11
Extremely sky connects.
A kind of method of testing of the disposable wiring automatic testing equipment of 1000kV extra-high voltage CVT, it is characterised in that include with
Lower step：
Step one, applying high pressure to the first high pressure Sampling Interface GX1, according to electric capacity opposition method, the first high pressure Sampling Interface
GX1Collection high-tension current I1, electric current I1For flowing through the first electric capacity C11Electric current I2With the second electric capacity C12Electric current I3Total current,
Again by electric current I1With the electric current I for flowing through standard capacitance CNCNMake comparisons and draw the first electric capacity C11With the second electric capacity C12Under parallel connection
High-tension current I1Size and phase place, preserve result；According to the positive connection of electric capacity, the second electric capacity C is flow through12Electric current I3Enter the
Two low pressure Sampling Interface CX2, electric current I with standard capacitance CNCNIt is compared analysis and draws and flows through the second electric capacity C12Electric current I3
Size and phase place, obtain the second electric capacity C12Capacitance and dielectric loss value, by the electric current I for collecting1With electric current I3, in conjunction with formulaCalculate electric current I2Phase place and sizes values, draw the first electric capacity C11Capacitance and dielectric loss value；
Step 2, switching high pressure to the second high pressure Sampling Interface GX being connected with contact c2, by the first high pressure Sampling Interface
GX1Ground connection, the second high pressure Sampling Interface GX2The high pressure of output is applied to the 3rd electric capacity C13 and the 4th electric capacity C14, produces electricity respectively
Stream I5, electric current I6, electric current I5, electric current I6Respectively enter the second low pressure Sampling Interface CX2With the first low pressure Sampling Interface CX1, by electricity
Stream I5, electric current I6Respectively with the electric current I for flowing through standard capacitance CNCNThe com-parison and analysis for electric current being carried out with phase place draw C13With C14Electricity
Capacitance and dielectric loss value；
Step 3, using CVT self-excitation method to the 5th electric capacity C15With the 6th electric capacity C2Tested, controlled the first high pressure vacuum
Relay S1With the 3rd high pressure low-vacuum load-tripping device S3Action, the second electric capacity C2 is connected with standard capacitance CN, is produced and is flow through standard electric
Hold the electric current I of CNCN, and contact c point is grounded so that the second high pressure Sampling Interface GX2With the first high pressure Sampling Interface GX1Nothing
High voltage output；Output voltage is to the primary coil of the second transformator, and its blood pressure lowering winding produces a self-excitation voltage and supplies first
One of blood pressure lowering winding of transformator, after the first transformer boost, e point produces high pressure, high-tension current I7Through contact e point
It is divided into electric current I8, electric current I9, the first low pressure Sampling Interface CX1The electric current I of the 5th electric capacity C15 is flow through in collection8, by with flow through mark
The electric current I of pseudo-capacitance CNCNC is relatively drawn15Capacitance and dielectric loss value；Action the first high pressure vacuum relay S1, the second high pressure
Low-vacuum load-tripping device S2, cut-out inner high voltage, short-circuit standard capacitance CN, flows through the 6th electric capacity C2Electric current I9Without standard capacitance CN, directly
Connect and standard capacitance signal sampling channel is entered into, by by electric current I8Electric current as standard and standard capacitance signal sampling channel
I9The comparison for carrying out size and phase place calculates capacitance and the dielectric loss value of C2.
The boosting winding of second transformator is used for boost in voltage to 0-10KV；Blood pressure lowering winding is used for voltage step-down
To 0-50V.
Beneficial effects of the present invention：
The present invention is integrated by effective function, realizes disposable wiring, disposable measurement, is improved work efficiency, is reduced
Labor intensity, effectively shortens the testing time.
Description of the drawings
Five wiring electrical schematic diagrams that Fig. 1 is tested for traditional 1000kVCVT.
Fig. 2 is the structural representation of an embodiment of the present invention.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that specific embodiment described herein is not used to only in order to explain the present invention
Limit the present invention.
Below in conjunction with the accompanying drawings the application principle of the present invention is explained in detail.
As shown in Fig. 2 a kind of disposable wiring automatic testing equipment of 1000kV extra-high voltage CVT, including CVT circuit and test
Circuit, the first electric capacity C11 that the CVT circuit includes to be sequentially connected with, the second electric capacity C12, the 3rd electric capacity C13, the 4th electric capacity
C14, the 5th electric capacity C15, are equipped with wiring point, respectively tetra- wiring points of a, b, c, d, wiring point d between two neighboring electric capacity
With b respectively with the first low pressure Sampling Interface CX1With the second low pressure Sampling Interface CX2It is connected, CVT circuit also includes the 6th electric capacity C2
With the first transformator, one end of the 6th electric capacity C2 is connected with the 5th electric capacity C15, and the other end is provided with wiring point ＆, the 5th electric capacity C15
And the 6th be provided with wiring point e between electric capacity C2, the two ends of the primary coil of the first transformator are connected with wiring point e and ground respectively
(i.e. wherein one end of the primary coil of the first transformator is grounded, and the other end is connected with wiring point e)；The test circuit includes
Two transformators, standard capacitance CN, the second transformator includes armature winding, boosting winding, blood pressure lowering winding, and boosting winding passes through first
Relay S1, the 6th relay S10 and the second high pressure Sampling Interface GX2It is connected with wiring c point, the first relay S1 is also by leading
Line is connected with the second relay S2, and the outfan of the second relay S2 is connected with standard capacitance signal sampling channel, the standard
The two ends of electric capacity CN are connected with the 3rd relay S3 and the second relay S2 respectively；One of outfan of the 3rd relay S3
By the 4th relay S4 and the first high pressure Sampling Interface GX1It is connected with wiring a point (preferably, in the 4th relay S4 and
One high pressure Sampling Interface GX1Between be additionally provided with reversal connection sampling plate), another outfan by the 5th relay S5 and CVT self-excitation height
Pressure special purpose interface CVT-HV is connected with wiring point ＆；Blood pressure lowering winding is by the 7th relay S11 and CVT self-excitation low pressure output interface
CVT-LV is connected with the one of which secondary coil of the first transformator.
Further, the disposable wiring automatic testing equipment of described a kind of 1000kV extra-high voltage CVT, also includes outside
Plate, the first low pressure Sampling Interface CX1, the second low pressure Sampling Interface CX2, the first high pressure Sampling Interface GX1, the second high pressure adopts
Sample interface GX2, CVT self-excitation high pressure special purpose interface CVT-HV, CVT self-excitation low pressure output interface CVT-LV be arranged at outer panels
On, tested for being connected with test item.
Further, second transformator is high-tension transformer.
Further, the boosting winding of second transformator is used for boost in voltage to 0-10KV；Blood pressure lowering winding is used for
By voltage step-down to 0-50V.
Further, the first relay S1, the second relay S2, the 3rd relay S3, the 4th relay S4, the 5th
Relay S5, the 6th relay S10, the 7th relay S11 are high pressure vacuum relay.
Further, one of input electrode ground connection of the 6th relay S10；7th relay S11 is wherein
One input electrode sky connects.
A kind of method of testing of the disposable wiring automatic testing equipment of 1000kV extra-high voltage CVT, comprises the following steps：
Step one, applying high pressure to the first high pressure Sampling Interface GX1, according to electric capacity opposition method, the first high pressure Sampling Interface
GX1Collection high-tension current I1, electric current I1For flowing through the first electric capacity C11Electric current I2With the second electric capacity C12Electric current I3Total current,
Again by electric current I1With the electric current I for flowing through standard capacitance CNCNMake comparisons and draw the first electric capacity C11With the second electric capacity C12Under parallel connection
High-tension current I1Size and phase place, preserve result；According to the positive connection of electric capacity, the second electric capacity C is flow through12Electric current I3Enter the
Two low pressure Sampling Interface CX2, electric current I with standard capacitance CNCNIt is compared analysis and draws and flows through the second electric capacity C12Electric current I3
Size and phase place, obtain the second electric capacity C12Capacitance and dielectric loss value, by the electric current I for collecting1With electric current I3, in conjunction with formulaCalculate electric current I2Phase place and sizes values, draw the first electric capacity C11Capacitance and dielectric loss value；
Step 2, switching high pressure to the second high pressure Sampling Interface GX being connected with contact c2, by the first high pressure Sampling Interface
GX1Ground connection, the second high pressure Sampling Interface GX2The high pressure of output is applied to the 3rd electric capacity C13 and the 4th electric capacity C14, produces electricity respectively
Stream I5, electric current I6, electric current I5, electric current I6Respectively enter the second low pressure Sampling Interface CX2With the first low pressure Sampling Interface CX1, by electricity
Stream I5, electric current I6Respectively with the electric current I for flowing through standard capacitance CNCNThe com-parison and analysis for electric current being carried out with phase place draw C13With C14Electricity
Capacitance and dielectric loss value；
Step 3, using CVT self-excitation method to the 5th electric capacity C15With the 6th electric capacity C2Tested, controlled the first high pressure vacuum
Relay S1With the 3rd high pressure low-vacuum load-tripping device S3Action, the second electric capacity C2 is connected with standard capacitance CN, is produced and is flow through standard electric
Hold the electric current I of CNCN, and contact c point is grounded so that the second high pressure Sampling Interface GX2With the first high pressure Sampling Interface GX1Nothing
High voltage output；Output voltage is to the primary coil of the second transformator, and its blood pressure lowering winding produces a self-excitation voltage and supplies first
One of blood pressure lowering winding of transformator, after the first transformer boost, e point produces high pressure, high-tension current I7Through contact e point
It is divided into electric current I8, electric current I9, the first low pressure Sampling Interface CX1The electric current I of the 5th electric capacity C15 is flow through in collection8, by with flow through mark
The electric current I of pseudo-capacitance CNCNC is relatively drawn15Capacitance and dielectric loss value；Action the first high pressure vacuum relay S1, the second high pressure
Low-vacuum load-tripping device S2, cut-out inner high voltage, short-circuit standard capacitance CN, flows through the 6th electric capacity C2Electric current I9Without standard capacitance CN, directly
Connect and standard capacitance signal sampling channel is entered into, by by electric current I8Electric current as standard and standard capacitance signal sampling channel
I9The comparison for carrying out size and phase place calculates capacitance and the dielectric loss value of C2.
To sum up, the test philosophy of the present invention is described as follows：
By the first low pressure Sampling Interface CX1, the second low pressure Sampling Interface CX2, the first high pressure Sampling Interface GX1, second high
Pressure Sampling Interface GX2, CVT self-excitation high pressure special purpose interface CVT-HV, CVT self-excitation low pressure output interface CVT-LV realize disposably connect
Six roots of sensation line, the substep that automatically controls of automatic testing equipment is tested, and disposably draws C11, C12, C13, C14, C15, C2Electric capacity
Value and dielectric loss value.
Automatic testing equipment test whole flow process substep is carried out, first can be to C11With C12Tested, its principle is automatic
First high pressure Sampling Interface GX of test device1Collection high-tension current I1(electric capacity opposition method), this electric current is for flowing through C11(I2) with
C12(I3) total current, then by itself and the electric current I for flowing through standard capacitance CNCNMake comparisons and draw C11With C12Height under parallel connection
Current voltage I1Size and phase place, as a result preserve.In the way of low pressure sampling, (the positive connection of electric capacity) flows through C again12Electric current I3
Enter the second low pressure Sampling Interface CX2, with normalized current ICNIt is compared analysis and draws and flows through C12Electric current I3Size and phase
Position, also just draws C12Electric capacity and dielectric loss value, now I1With I3Phase place is acquired with sizes values to be finished, according to formulaCalculate and flow through C11Electric current I2Phase place and sizes values, also just drawn C11Electric capacity and dielectric loss value, C11
With C12Electric capacity just test with dielectric loss value and complete.
Capacitance and dielectric loss value measurement mechanism are：There are standard capacitance CN, this standard inside automatic testing equipment
Electric capacity is using 50pF, dielectric loss value for being close to 0, that is to say, that when programming, the electric current for flowing through electric capacity CN is defaulted as
Known quantity, when a voltage is applied to test item (i.e. CVT) and standard capacitance CN, by comparing the electric current of test item simultaneously
Electric current I with standard capacitance CNCN, compare their amplitude size and capacitance can be calculated, compare their angle and can count
Calculate dielectric loss value.For example：The electric capacity C that measurement capacitance is 100pF, dielectric loss value is 0.02XWhen, when the effect of high pressure is measured,
Electric current I is produced in standard capacitance CNCN, test item generation electric current IXIf, now electric current IXAmplitude Ration electric current ICNBig 2 times { (U* ω *
100)/U* ω * 50 }, capacitance differs 2 times, and IXThe delayed I of angleCNAbout 1.14576 degree (i.e. arctan (0.02)).The present invention
In capacitance and dielectric loss value can also be calculated using other existing methods.
Next switch high pressure to the second high pressure Sampling Interface GX being connected with c point2, by the first high pressure Sampling Interface GX1Connect
Ground.Second high pressure Sampling Interface GX2The high pressure of output is applied to C13 and C14, produces two electric current I5、I6Respectively enter second low
Pressure Sampling Interface CX2With the first low pressure Sampling Interface CX1.By I5、I6Respectively with ICNThe com-parison and analysis for carrying out electric current and phase place must
C is gone out13With C14Electric capacity and dielectric loss value.
C11、C12、C13、C14All complete after tested, next begin to C15With C2Carry out the test of CVT self-excitation method.Control
High pressure vacuum relay S processed1With S3Action so that GX2With GX1No High voltage output, and c point is grounded.Output 0-160V voltage is arrived
The primary coil of the second transformator, one the first transformator of 0～50V self-excitation voltage supply of now its blood pressure lowering winding generation is wherein
One blood pressure lowering winding, after the first transformer boost, e point produces the high pressure of (0～4kV), high-tension current I7Through e point minute two-way
Electric current I8、I9, the first low pressure Sampling Interface CX1The electric current I of C15 is flow through in collection8, by with the I for flowing through standard capacitanceCNElectric current ratio
C is relatively drawn15Electric capacity and dielectric loss value.Second transformator is inner high voltage transformator, and it has three windings, and armature winding is 160V,
Boosting winding is 10KV, and blood pressure lowering winding is 50V.The voltage of output 0-160V is to interior high transformer armature winding, inner high voltage transformation
The voltage for boosting to 0-10KV is exported to each measurement links by device through S1；While also 0-50V can be produced inside blood pressure lowering winding
Voltage, for CVT self-excitation method export.In the positive connection of electric capacity and electric capacity opposition method measurement process, S1, S2 are failure to actuate (as Fig. 2
Shown in), the high pressure that inner high voltage transformator is produced divides two-way to walk：Standard capacitance connected with standard capacitance CN is flow through on a wherein road
Signal sampling channel, another road is through S3 or S10 to test item.When using CVT self-excitation method, S11 action, 0-50 is defeated
Go out any one blood pressure lowering winding of low-pressure side of the first transformator to CVT, e point will produce the high pressure of 0-4KV；In S1 action cut-out
High voltage output, C2 electric capacity is connected in S3 action so that C2 electric capacity is connected with standard capacitance CN, produces ICNElectric current, due to C2 capacitance
Much larger than standard capacitance CN, by contrasting ICNAnd I8Size and goniometer calculate electric capacity and the dielectric loss of C15.Second step S2 is moved
Make, cut-out inner high voltage, short-circuit standard capacitance CN, that now enter standard capacitance signal sampling channel is the electric current I9 on C2, leads to
Cross the I for having calculated before contrast8Galvanometer is calculated by S in the electric capacity of C2 and dielectric loss value, i.e. second step2Action, by standard capacitance
CN short circuit, flows through C2Electric current I9Without standard capacitance CN, standard capacitance signal sampling channel is flowed directly into, then will before
Drawn after tested flows through C15Electric current I8Make the electric current I in standard and standard capacitance signal sampling channel9Carry out size and phase
Position more just drawn C2Electric capacity and dielectric loss value.Disposable wiring is this completes, to C11、C12、C13、C14、C15、C2
Disposable test.
Electric capacity and the dielectric loss value of above 6 electric capacity are disposably given.The present invention is integrated by effective function, is realized once
Property wiring, disposable measure, improve work efficiency, reduce labor intensity, effectively shorten the testing time.Remaining not described part
Same as the prior art.
Ultimate principle and principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not restricted to the described embodiments, simply explanation described in above-described embodiment and description this
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these changes
Change and improvement is both fallen within scope of the claimed invention.The claimed scope of the invention by appending claims and its
Equivalent thereof.
Claims (8)
1. the disposable wiring automatic testing equipment of a kind of 1000kV extra-high voltage CVT, including CVT circuit and test circuit, its feature
It is：The first electric capacity C11 that the CVT circuit includes to be sequentially connected with, the second electric capacity C12, the 3rd electric capacity C13, the 4th electric capacity
C14, the 5th electric capacity C15, are equipped with wiring point, respectively tetra- wiring points of a, b, c, d, wiring point d between two neighboring electric capacity
With b respectively with the first low pressure Sampling Interface CX1With the second low pressure Sampling Interface CX2It is connected, CVT circuit also includes the 6th electric capacity C2
With the first transformator, one end of the 6th electric capacity C2 is connected with the 5th electric capacity C15, and the other end is provided with wiring point ＆, the 5th electric capacity C15
And the 6th be provided with wiring point e between electric capacity C2, the two ends of the primary coil of the first transformator are connected with wiring point e and ground respectively；
The test circuit includes the second transformator, standard capacitance CN, the second transformator include armature winding, boosting winding, blood pressure lowering around
Group, boosting winding is by the first relay S1, the 6th relay S10 and the second high pressure Sampling Interface GX2It is connected with wiring c point,
First relay S1 is connected with the second relay S2 also by wire, and the outfan of the second relay S2 is connected with standard capacitance letter
Number acquisition channel, the two ends of standard capacitance CN are connected with the 3rd relay S3 and the second relay S2 respectively；3rd relay
One of outfan of device S3 passes through the 4th relay S4 and the first high pressure Sampling Interface GX1It is connected with wiring a point, another
Outfan is connected with wiring point ＆ with CVT self-excitation high pressure special purpose interface CVT-HV by the 5th relay S5；Blood pressure lowering winding is by the
Seven relay S11 are connected with the one of which blood pressure lowering secondary coil of the first transformator with CVT self-excitation low pressure output interface CVT-LV.
2. the disposable wiring automatic testing equipment of a kind of 1000kV extra-high voltage CVT according to claim 1, its feature exists
In：Also include outer panels, the first low pressure Sampling Interface CX1, the second low pressure Sampling Interface CX2, the first high pressure Sampling Interface
GX1, the second high pressure Sampling Interface GX2, CVT self-excitation high pressure special purpose interface CVT-HV, CVT self-excitation low pressure output interface CVT-LV equal
It is arranged in outer panels, is respectively used to be connected with test item and is tested.
3. the disposable wiring automatic testing equipment of a kind of 1000kV extra-high voltage CVT according to claim 1, its feature exists
In：Second transformator is high-tension transformer.
4. the disposable wiring automatic testing equipment of a kind of 1000kV extra-high voltage CVT according to claim 3, its feature exists
In：The boosting winding of second transformator is used for boost in voltage to 0-10KV；Blood pressure lowering winding is used for voltage step-down to 0-
50V.
5. the disposable wiring automatic testing equipment of a kind of 1000kV extra-high voltage CVT according to claim 1, its feature exists
In：The first relay S1, the second relay S2, the 3rd relay S3, the 4th relay S4, the 5th relay S5, the 6th
Relay S10 and the 7th relay S11 are high pressure vacuum relay.
6. the disposable wiring automatic testing equipment of a kind of 1000kV extra-high voltage CVT according to claim 1, its feature exists
In：One of input electrode ground connection of the 6th relay S10；One of input electrode sky of the 7th relay S11
Connect.
7. the disposable wiring automatic testing equipment of a kind of 1000kV extra-high voltage CVT according to any one of claim 1-6
Method of testing, it is characterised in that comprise the following steps：
Step one, applying high pressure to the first high pressure Sampling Interface GX1, according to electric capacity opposition method, the first high pressure Sampling Interface GX1Adopt
Collection high-tension current I1, electric current I1For flowing through the first electric capacity C11Electric current I2With the second electric capacity C12Electric current I3Total current, then by electricity
Stream I1With the electric current I for flowing through standard capacitance CNCNMake comparisons and draw the first electric capacity C11With the second electric capacity C12High pressure under parallel connection
Electric current I1Size and phase place, preserve result；According to the positive connection of electric capacity, the second electric capacity C is flow through12Electric current I3Enter the second low pressure
Sampling Interface CX2, electric current I with standard capacitance CNCNIt is compared analysis and draws and flows through the second electric capacity C12Electric current I3Size
With phase place, the second electric capacity C is obtained12Capacitance and dielectric loss value, by the electric current I for collecting1With electric current I3, in conjunction with formulaCalculate electric current I2Phase place and sizes values, draw the first electric capacity C11Capacitance and dielectric loss value；
Step 2, switching high pressure to the second high pressure Sampling Interface GX being connected with contact c2, by the first high pressure Sampling Interface GX1Connect
Ground, the second high pressure Sampling Interface GX2The high pressure of output is applied to the 3rd electric capacity C13 and the 4th electric capacity C14, produces electric current I respectively5、
Electric current I6, electric current I5, electric current I6Respectively enter the second low pressure Sampling Interface CX2With the first low pressure Sampling Interface CX1, by electric current I5、
Electric current I6Respectively with the electric current I for flowing through standard capacitance CNCNThe com-parison and analysis for electric current being carried out with phase place draw C13With C14Capacitance
With dielectric loss value；
Step 3, using CVT self-excitation method to the 5th electric capacity C15With the 6th electric capacity C2Tested, controlled the first high pressure vacuum relay
Device S1With the 3rd high pressure low-vacuum load-tripping device S3Action, the second electric capacity C2 is connected with standard capacitance CN, is produced and is flow through standard capacitance CN
Electric current ICN, and contact c point is grounded so that the second high pressure Sampling Interface GX2With the first high pressure Sampling Interface GX1No high pressure
Output；Output voltage is to the primary coil of the second transformator, and its blood pressure lowering winding produces a self-excitation voltage and supplies the first transformation
One of blood pressure lowering winding of device, after the first transformer boost, e point produces high pressure, high-tension current I7It is divided into through contact e point
Electric current I8, electric current I9, the first low pressure Sampling Interface CX1The electric current I of the 5th electric capacity C15 is flow through in collection8, by with flow through standard electric
Hold the electric current I of CNCNC is relatively drawn15Capacitance and dielectric loss value；Action the first high pressure vacuum relay S1, the second high pressure vacuum
Relay S2, cut-out inner high voltage, short-circuit standard capacitance CN, flows through the 6th electric capacity C2Electric current I9Without standard capacitance CN, directly enter
Enter to standard capacitance signal sampling channel, by by electric current I8Electric current I as standard and standard capacitance signal sampling channel9Enter
The comparison of row size and phase place calculates capacitance and the dielectric loss value of C2.
8. the method for testing of the disposable wiring automatic testing equipment of a kind of 1000kV extra-high voltage CVT according to claim 7,
It is characterized in that：The boosting winding of second transformator is used for boost in voltage to 0-10KV；Blood pressure lowering winding is used for voltage
It is depressured to 0-50V.
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| CN106443200B (en) | 2023-04-14 |
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