CN108490321A - A kind of induction type switching impulse Withstand test device - Google Patents
A kind of induction type switching impulse Withstand test device Download PDFInfo
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- CN108490321A CN108490321A CN201810233043.2A CN201810233043A CN108490321A CN 108490321 A CN108490321 A CN 108490321A CN 201810233043 A CN201810233043 A CN 201810233043A CN 108490321 A CN108490321 A CN 108490321A
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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Abstract
The embodiment of the invention discloses a kind of induction type switching impulse Withstand test devices.It can think that the winding of the low-pressure side of transformer applies operating impulse voltage in the present invention by operation impulse voltage generator, on high-tension side winding will produce induction type oscillating operation wave, voltage divider can be organized by the first derided capacitors and two derided capacitors, the voltage of step down side after decompression is provided for the first oscillograph, third derided capacitors and the 4th derided capacitors can organize voltage divider, the voltage of high voltage side of transformer after partial pressure is provided for the second oscillograph, the voltage change situation of transformer whole experiment process mesohigh side to be detected and low-pressure side is observed that by the first oscillograph and the second oscillograph, solves the technical issues of designing a kind of switching impulse Withstand test device.
Description
Technical field
The present invention relates to power test field more particularly to a kind of induction type switching impulse Withstand test devices.
Background technology
As super extra-high voltage (HV) transmission system is in fast development all over the world, power transformer is the core of electric system
Heart component part, power transformer are the key that ensure that power grid is reliable and safe operation.It is primarily present in the power system in short-term
These three overvoltage forms of power-frequency overvoltage, lightning surge and switching overvoltage, for super extra-high voltage system, power frequency mistake in short-term
Voltage and lightning surge have not been to influence the principal element of apparatus insulated level, and switching overvoltage has become currently
The principal element of apparatus insulated level is influenced in super extra-high voltage system.
Therefore, the switching impulse pressure test of transformer equipment research is particularly important, how designs a kind of operation
Impulse withstand voltage experimental rig has become the technical issues of those skilled in the art's urgent need to resolve.
Invention content
The present invention provides a kind of induction type switching impulse Withstand test devices, solve a kind of switching impulse pressure resistance of design
The technical issues of experimental rig.
As can be seen from the above technical solutions, the present invention has the following advantages：
The present invention provides a kind of induction type switching impulse Withstand test devices, including：Transformer to be detected, switching impulse
Voltage generator, the first derided capacitors, the second derided capacitors, third derided capacitors, the 4th derided capacitors, the first oscillograph and
Two oscillographs；The low-pressure side of transformer to be detected is the solution of a triangle, the output end and low-pressure side of operation impulse voltage generator
The first phase sleeve end electrical connection, the sleeve end of the second phase of low-pressure side and the non-sleeve end of the first phase of low-pressure side are electrically connected
It connects, the sleeve end ground connection of the second phase of low-pressure side；The first end of the output end of impulse voltage generator and the first derided capacitors electricity
Connection, the first end of the second ends of the first derided capacitors respectively with the input terminal of the first oscillograph and the second derided capacitors are electrically connected
It connects, the second end ground connection of the second derided capacitors；The high-pressure side of transformer to be detected be star connection, on high-tension side first phase with it is low
The first of pressure side is mutually corresponding；The sleeve end of on high-tension side first phase is electrically connected with the first end of third derided capacitors, third point
The second end of voltage capacitance is electrically connected with the first end of the input terminal of the second oscillograph and the 4th derided capacitors respectively, the 4th partial pressure electricity
The second end of appearance is grounded.
It can think that the winding of the low-pressure side of transformer applies switching impulse in the present invention by operation impulse voltage generator
Voltage, on high-tension side winding will produce induction type oscillating operation wave, can be made up of the first derided capacitors and two derided capacitors
Divider provides the voltage of the step down side after decompression, third derided capacitors and the 4th derided capacitors for the first oscillograph
Voltage divider can be organized, the voltage of the high voltage side of transformer after partial pressure is provided for the second oscillograph, passes through the first oscillograph and the
Two oscillographs are observed that the voltage change situation of transformer whole experiment process mesohigh side to be detected and low-pressure side, solve
A kind of the technical issues of switching impulse Withstand test device of design.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without having to pay creative labor, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of circuit structure diagram of induction type switching impulse Withstand test device provided in an embodiment of the present invention；
Fig. 2 is a kind of circuit structure diagram of operation impulse voltage generator provided in an embodiment of the present invention；
Fig. 3 is a kind of fundamental diagram of Rogowski coil provided in an embodiment of the present invention；
Wherein, reference numeral is as follows：
1, operation impulse voltage generator；2, the first oscillograph；3, the second oscillograph；4, third oscillograph；5, HFCT is passed
Sensor；6, the 4th oscillograph；7, Rogowski coil；8, operational amplifier；C1, the first derided capacitors；C2, the second partial pressure electricity
Hold；C3, third derided capacitors；C4, the 4th derided capacitors；R1, show and hinder resistance；C5, wave head capacitance；R2, wave front resistance；R3, wave
Tail resistance；L1, harmonic inductance；R4, first resistor；R5, second resistance；R6, feedback resistance；C6, feedback capacity.
Specific implementation mode
An embodiment of the present invention provides a kind of induction type switching impulse Withstand test devices, solve a kind of operation punching of design
The technical issues of hitting Withstand test device.
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that disclosed below
Embodiment be only a part of the embodiment of the present invention, and not all embodiment.Based on the embodiments of the present invention, this field
All other embodiment that those of ordinary skill is obtained without making creative work, belongs to protection of the present invention
Range.
Referring to Fig. 1, an embodiment of the present invention provides an a kind of implementations of induction type switching impulse Withstand test device
Example, including：
Transformer to be detected, operation impulse voltage generator 1, the first derided capacitors C1, the second derided capacitors C2, third point
Voltage capacitance C3, the 4th derided capacitors C4, the first oscillograph 2 and the second oscillograph 3；
The low-pressure side of transformer to be detected is the solution of a triangle, the output end and low-pressure side of operation impulse voltage generator 1
The first phase sleeve end electrical connection, the sleeve end of the second phase of low-pressure side and the non-sleeve end of the first phase of low-pressure side are electrically connected
It connects, the sleeve end ground connection of the second phase of low-pressure side；
The output end of impulse voltage generator is electrically connected with the first end of the first derided capacitors C1, the first derided capacitors C1's
Second end is electrically connected with the first end of the input terminal of the first oscillograph 2 and the second derided capacitors C2 respectively, the second derided capacitors C2
Second end ground connection；
The high-pressure side of transformer to be detected is star connection, and the first of on high-tension side first phase and low-pressure side is mutually corresponding；
The sleeve end of on high-tension side first phase is electrically connected with the first end of third derided capacitors C3, third derided capacitors C3's
Second end is electrically connected with the first end of the input terminal of the second oscillograph 3 and the 4th derided capacitors C4 respectively, the 4th derided capacitors C4
Second end ground connection.
It should be noted that can think the low-pressure side of transformer in the present embodiment by operation impulse voltage generator 1
Winding applies operating impulse voltage, and on high-tension side winding will produce induction type oscillating operation wave, by the first derided capacitors C1 and
Two derided capacitors can organize voltage divider, and the voltage of the step down side after decompression, third partial pressure are provided for the first oscillograph 2
Capacitance C3 and the 4th derided capacitors C4 can organize voltage divider, and the high voltage side of transformer after partial pressure is provided for the second oscillograph 3
Voltage, by the first oscillograph 2 and the second oscillograph 3 it is observed that transformer whole experiment process mesohigh side to be detected and
The voltage change situation of low-pressure side solves the technical issues of designing a kind of switching impulse Withstand test device.
It is a kind of one embodiment of induction type switching impulse Withstand test device provided in an embodiment of the present invention above, with
It is a kind of another embodiment of induction type switching impulse Withstand test device provided in an embodiment of the present invention down.
It please refers to Fig.1, Fig. 2 and Fig. 3, an embodiment of the present invention provides a kind of induction type switching impulse Withstand test devices
Another embodiment, including：Transformer to be detected, operation impulse voltage generator 1, the first derided capacitors C1, the second partial pressure electricity
Hold C2, third derided capacitors C3, the 4th derided capacitors C4, the first oscillograph 2 and the second oscillograph 3；
The low-pressure side of transformer to be detected is the solution of a triangle, the output end and low-pressure side of operation impulse voltage generator 1
The first phase sleeve end electrical connection, the sleeve end of the second phase of low-pressure side and the non-sleeve end of the first phase of low-pressure side are electrically connected
It connects, the sleeve end ground connection of the second phase of low-pressure side；
The output end of impulse voltage generator is electrically connected with the first end of the first derided capacitors C1, the first derided capacitors C1's
Second end is electrically connected with the first end of the input terminal of the first oscillograph 2 and the second derided capacitors C2 respectively, the second derided capacitors C2
Second end ground connection；
The high-pressure side of transformer to be detected is star connection, and the first of on high-tension side first phase and low-pressure side is mutually corresponding；
The sleeve end of on high-tension side first phase is electrically connected with the first end of third derided capacitors C3, third derided capacitors C3's
Second end is electrically connected with the first end of the input terminal of the second oscillograph 3 and the 4th derided capacitors C4 respectively, the 4th derided capacitors C4
Second end ground connection.
It can think that the winding of the low-pressure side of transformer applies operation punching in the present embodiment by operation impulse voltage generator 1
Voltage is hit, on high-tension side winding will produce induction type oscillating operation wave, can be with by the first derided capacitors C1 and two derided capacitors
Group voltage divider, for the first oscillograph 2 provide decompression after step down side voltage, third derided capacitors C3 and the 4th point
Voltage capacitance C4 can organize voltage divider, and the voltage of the high voltage side of transformer after partial pressure is provided for the second oscillograph 3, is shown by first
Wave device 2 and the second oscillograph 3 are it is observed that the voltage of transformer whole experiment process mesohigh side to be detected and low-pressure side becomes
Change situation.
Further, further include：Show and hinders resistance R1, third oscillograph 4；
Show that hinder the first end of resistance R1 is electrically connected with the on high-tension side neutral point of transformer to be detected, shows and hinder the of resistance R1
Two ends are grounded；
The input terminal of third oscillograph 4 is electrically connected with the on high-tension side neutral point of transformer to be detected.
It should be noted that when carrying out the experiment of induction type oscillating operation impulse withstand voltage, between high-pressure side neutral point and ground
The electric current of oscillatory extinction can be flowed through, that is, shows and hinders electric current, shows to hinder electric current and flow through and shows that the when of hindering resistance R1 will produce pressure drop, with third oscillography
The measurement of device 4 can obtain showing the voltage for hindering the both ends resistance R1, hinder the resistance value of resistance R1 with the voltage value divided by show when handling data,
It can be obtained and show the truthful data for hindering electric current；
When transformer high-voltage winding (being especially tested phase winding) is there are when turn insulation defect or winding deformation, impedance or
Distribution capacity changes, and lead to flow through high-voltage winding shows that hindering electric current changes, therefore can be according to measuring showing of obtaining
Hinder the changing rule of the waveform of electric current to judge the state of high voltage side of transformer winding.
Further, further include：HFCT sensors 5 and the 4th oscillograph 6；
The sleeve end of on high-tension side first phase of transformer to be detected is grounded；
The ground wire of the sleeve end of on high-tension side first phase is across HFCT sensors 5, the output end of HFCT sensors 5 and
The input terminal of four oscillographs 6 is electrically connected.
It should be noted that when carrying out the experiment of induction type oscillating operation impulse withstand voltage to transformer, by high-pressure side casing end
Screen ground connection, bushing is equivalent to a coupled capacitor in parallel with high-voltage winding at this time；
The equivalent capacity of bushing is only hundreds of pico farads, is much smaller than the equivalent capacity of high-voltage winding and bushing, because
The oscillating operation shock wave that this experiment applies does not flow through bushing, the superfrequency generated when shelf depreciation occurs in transformer
Electromagnetic wave signal can pass through bushing it is equivalent go out coupling capacitance loop, install HFCT on the ground wire of end shield of high-voltage bushing
Sensor 5, so that it may to collect the ultrahigh frequency electromagnetic wave signal of shelf depreciation generation.
Further, operation impulse voltage generator 1 specifically includes：Wave head capacitance C5, wave front resistance R2, wave terminal resistance
R3, harmonic inductance L1, the first metal ball and the second metal ball；
The first end of wave head capacitance C5 is electrically connected with the first metal ball, the second end ground connection of wave head capacitance C5；
First metal ball and the non-contact setting of the second metal ball, the second metal ball respectively with the first end of wave front resistance R2 and
The first end of wave terminal resistance R3 is electrically connected, the second end ground connection of wave terminal resistance R3；
The second end of wave front resistance R2 is electrically connected with the first end of harmonic inductance L1；
The second end of harmonic inductance L1 respectively with the sleeve end of the first phase of low-pressure side and the first derided capacitors C1 first
End electrical connection.
It should be noted that be a realization method of operation impulse voltage generator 1 above, it can in practical work process
To select other operation impulse voltage generators 1 as needed.
Further, show that the resistance value for hindering resistance R1 is less than or equal to 1.5 Ω.
It should be noted that general require to show that the resistance value for hindering resistance R1 is no more than 1.5 Ω.
Further, HFCT sensors 5 specifically include：Rogowski coil 7, first resistor R4, second resistance R5, feedback
Resistance R6, feedback capacity C6 and operational amplifier 8；
First terminals of Rogowski coil 7 are electrically connected with the first end of first resistor R4, and the of Rogowski coil 7
Two terminals are grounded；
The second end of first resistor R4 is electrically connected with the in-phase input end of operational amplifier 8；
The first end of second resistance R5 is electrically connected with the reverse input end of operational amplifier 8, the second end of second resistance R5
Ground connection；
The first end of feedback resistance R6 is electrically connected with the in-phase input end of operational amplifier 8, the second end of feedback resistance R6
It is electrically connected with the output end of operational amplifier 8；
The first end of feedback capacity C6 is electrically connected with the in-phase input end of operational amplifier 8, the second end of feedback capacity C6
It is electrically connected with the output end of operational amplifier 8；
The ground wire of the sleeve end of on high-tension side first phase across Rogowski coil 7, the output end of operational amplifier 8 with
The input terminal of 4th oscillograph 6 is electrically connected.
It should be noted that as described in Figure 3, the principle of the Rogowski coil 7 of the present embodiment makes, Rogowski coil
7 be in hollow annular, by the ground wire of the sleeve end of on high-tension side first phase across Rogowski coil 7, HFCT sensings when measurement
The encapsulation of device 5 is outer there are one Q9 interfaces, and the voltage exported after HFCT sensors 5 being measured and be converted by coaxial cable is believed
It number is transmitted on the 4th oscillograph 6.
It can think that the winding of the low-pressure side of transformer applies operation punching in the present embodiment by operation impulse voltage generator 1
Voltage is hit, on high-tension side winding will produce induction type oscillating operation wave, can be with by the first derided capacitors C1 and two derided capacitors
Group voltage divider, for the first oscillograph 2 provide decompression after step down side voltage, third derided capacitors C3 and the 4th point
Voltage capacitance C4 can organize voltage divider, and the voltage of the high voltage side of transformer after partial pressure is provided for the second oscillograph 3, is shown by first
Wave device 2 and the second oscillograph 3 are it is observed that the voltage of transformer whole experiment process mesohigh side to be detected and low-pressure side becomes
Change situation, solves the technical issues of designing a kind of switching impulse Withstand test device.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned each implementation
Technical solution recorded in example is modified or equivalent replacement of some of the technical features；And these modification or
It replaces, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.
Claims (6)
1. a kind of induction type switching impulse Withstand test device, which is characterized in that including：Transformer to be detected, switching impulse electricity
Press generator, the first derided capacitors, the second derided capacitors, third derided capacitors, the 4th derided capacitors, the first oscillograph and second
Oscillograph；
The low-pressure side of transformer to be detected is the solution of a triangle, the output end of operation impulse voltage generator and the first of low-pressure side
The sleeve end of phase is electrically connected, and the sleeve end of the second phase of low-pressure side is electrically connected with the non-sleeve end of the first phase of low-pressure side, low pressure
The sleeve end of second phase of side is grounded；
The output end of impulse voltage generator is electrically connected with the first end of the first derided capacitors, the second end point of the first derided capacitors
It is not electrically connected with the first end of the input terminal of the first oscillograph and the second derided capacitors, the second end ground connection of the second derided capacitors；
The high-pressure side of transformer to be detected is star connection, and the first of on high-tension side first phase and low-pressure side is mutually corresponding；
The sleeve end of on high-tension side first phase is electrically connected with the first end of third derided capacitors, the second end point of third derided capacitors
It is not electrically connected with the first end of the input terminal of the second oscillograph and the 4th derided capacitors, the second end ground connection of the 4th derided capacitors.
2. a kind of induction type switching impulse Withstand test device according to claim 1, which is characterized in that further include：Show wound electricity
Resistance, third oscillograph；
Show that hinder the first end of resistance is electrically connected with the on high-tension side neutral point of transformer to be detected, shows the second termination for hindering resistance
Ground；
The input terminal of third oscillograph is electrically connected with the on high-tension side neutral point of transformer to be detected.
3. a kind of induction type switching impulse Withstand test device according to claim 1, which is characterized in that further include：HFCT is passed
Sensor and the 4th oscillograph；
The sleeve end of on high-tension side first phase of transformer to be detected is grounded；
The ground wire of the sleeve end of on high-tension side first phase is across HFCT sensors, the output end of HFCT sensors and the 4th oscillography
The input terminal of device is electrically connected.
4. a kind of induction type switching impulse Withstand test device according to claim 1, which is characterized in that operating impulse voltage is sent out
Giving birth to implement body includes：Wave head capacitance, wave front resistance, wave terminal resistance, harmonic inductance, the first metal ball and the second metal ball；
The first end of wave head capacitance is electrically connected with the first metal ball, the second end ground connection of wave head capacitance；
First metal ball and the non-contact setting of the second metal ball, the second metal ball are electric with the first end of wave front resistance and wave rear respectively
The first end of resistance is electrically connected, the second end ground connection of wave terminal resistance；
The second end of wave front resistance is electrically connected with the first end of harmonic inductance；
The second end of harmonic inductance is electrically connected with the first end of the sleeve end of the first phase of low-pressure side and the first derided capacitors respectively.
5. a kind of induction type switching impulse Withstand test device according to claim 2, which is characterized in that show the resistance for hindering resistance
Value is less than or equal to 1.5 Ω.
6. a kind of induction type switching impulse Withstand test device according to claim 3, which is characterized in that HFCT senses implement body
Including：Rogowski coil, first resistor, second resistance, feedback resistance, feedback capacity and operational amplifier；
First terminals of Rogowski coil are electrically connected with the first end of first resistor, the second terminals of Rogowski coil
Ground connection；
The second end of first resistor is electrically connected with the in-phase input end of operational amplifier；
The first end of second resistance is electrically connected with the reverse input end of operational amplifier, the second end ground connection of second resistance；
The first end of feedback resistance is electrically connected with the in-phase input end of operational amplifier, the second end and operation amplifier of feedback resistance
The output end of device is electrically connected；
The first end of feedback capacity is electrically connected with the in-phase input end of operational amplifier, the second end and operation amplifier of feedback capacity
The output end of device is electrically connected；
The ground wire of the sleeve end of on high-tension side first phase shows across Rogowski coil, the output end of operational amplifier with the 4th
The input terminal of wave device is electrically connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810233043.2A CN108490321A (en) | 2018-03-21 | 2018-03-21 | A kind of induction type switching impulse Withstand test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810233043.2A CN108490321A (en) | 2018-03-21 | 2018-03-21 | A kind of induction type switching impulse Withstand test device |
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| CN108490321A true CN108490321A (en) | 2018-09-04 |
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| CN201810233043.2A Pending CN108490321A (en) | 2018-03-21 | 2018-03-21 | A kind of induction type switching impulse Withstand test device |
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| CN110854809A (en) * | 2019-11-11 | 2020-02-28 | 深圳供电局有限公司 | Detection method of transformer neutral point protection device and protection device |
| CN111458604A (en) * | 2019-12-27 | 2020-07-28 | 广东电网有限责任公司电力科学研究院 | Transformer self-sensing-based oscillation type lightning impulse test system and method |
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Application publication date: 20180904 |