CN211955792U - Transformer winding deformation tester calibrating device - Google Patents
Transformer winding deformation tester calibrating device Download PDFInfo
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- CN211955792U CN211955792U CN201922219688.3U CN201922219688U CN211955792U CN 211955792 U CN211955792 U CN 211955792U CN 201922219688 U CN201922219688 U CN 201922219688U CN 211955792 U CN211955792 U CN 211955792U
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Abstract
The utility model discloses a transformer winding deformation tester calibrating device relates to high-pressure measurement electric power test instrument's calibration, examination and detection area, and the main objective is the range value that calibration transformer winding deformation tester shows. The utility model discloses a main technical scheme does: a transformer winding deformation tester calibration apparatus, the apparatus comprising: the winding deformation tester comprises a controller, a power divider and an attenuator, wherein the controller is connected to the attenuator, the power divider comprises an input port, a first output port and a second output port, the input port is connected to the output end of the winding deformation tester to be tested, the first output port is connected to the reference end of the winding deformation tester to be tested, the input end of the attenuator is connected to the second output port, and the output end of the attenuator is connected to the response end of the winding deformation tester to be tested.
Description
Technical Field
The utility model relates to a calibration, examination and the detection area of high-pressure measurement electric power test instrument especially relate to a transformer winding deformation tester calibrating device.
Background
When the power transformer is subjected to short-circuit current surge, lightning current surge or collision in transportation, the winding deformation phenomenon is possibly generated, and the safe operation of the power transformer is directly influenced. The transformer winding deformation tester is an instrument for measuring the winding deformation of a transformer according to the national electric power industry standard DL/T911-2004 'frequency response analysis method for winding deformation of a power transformer', and the main detection parameter is the amplitude-frequency characteristic of each winding of the transformer within a certain frequency range, so that the amplitude detection accuracy is a key point of performance indexes and is a necessary means for ensuring the winding deformation accuracy of the frequency response method.
In the disclosed technical scheme, a lower part of an overall verification system of the winding deformation tester is divided into a two-port network, a verified device is provided with three ports, in the verification process, the two ports of the verified device are connected with the input end of the lower computer, the connection is simple without isolation, and the impedance change in the lower computer tends to directly influence the amplitude of a signal entering a first section of a measuring end, so that the test result is influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a transformer winding deformation tester calibrating device, the main objective is the range value that calibration transformer winding deformation tester shows.
In order to achieve the above object, the utility model mainly provides the following technical scheme:
the utility model provides a transformer winding deformation tester calibrating device, the device includes: the winding deformation tester comprises a controller, a power divider and an attenuator, wherein the controller is connected to the attenuator, the power divider comprises an input port, a first output port and a second output port, the input port is connected to the output end of the winding deformation tester to be tested, the first output port is connected to the reference end of the winding deformation tester to be tested, the input end of the attenuator is connected to the second output port, and the output end of the attenuator is connected to the response end of the winding deformation tester to be tested.
The purpose of the utility model and the technical problem thereof can be further realized by adopting the following technical measures.
Optionally, the winding deformation tester further comprises an amplitude limiter, an input end of the amplitude limiter is connected to an output end of the tested winding deformation tester, and an output end of the amplitude limiter is connected to the input port.
Optionally, the controller includes a touch display screen, a single board computer, and a relay, and the touch display screen, the single board computer, the relay, and the attenuator are connected in sequence.
Optionally, the relay includes a first relay and a second relay, the attenuator includes a first attenuator and a second attenuator that are connected to each other, the first attenuator is connected to the second output port, the second attenuator is connected to a response end of the tested winding deformation tester, the single board computer, the first relay and the first attenuator are connected in sequence, and the single board computer, the second relay and the second attenuator are connected in sequence.
Optionally, the model of the first attenuator is 8496G, and the model of the second attenuator is 8494G.
Optionally, the type of the limiter is 11867a, and the type of the power divider is 11667B.
Optionally, the device further comprises a housing, and the housing is provided with a grounding terminal.
Optionally, the cooling device further comprises a cooling fan, wherein the cooling fan is mounted on the housing and used for generating cooling air flow.
Borrow by above-mentioned technical scheme, the utility model discloses at least, have following advantage:
the device shunts the output signal of the tested winding deformation tester, thereby ensuring the frequency consistency of three signals of the output end, the corresponding end and the reference end of the tested winding deformation tester.
Drawings
Fig. 1 is the embodiment of the utility model provides a carry out wiring diagram of winding deformation tester check-up work.
Reference numerals in the drawings of the specification include: the device comprises a tested winding deformation tester 1, an amplitude limiter 2, a power divider 3, a first attenuator 4, a second attenuator 5, a single board computer 6, a touch display screen 7, a first relay 8, a second relay 9, a power supply 10, a shell 11, a grounding end 12 and a cooling fan 13.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose of the present invention, the following detailed description is given with reference to the accompanying drawings and preferred embodiments, in order to explain the detailed embodiments, structures, features and effects of the present invention. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Before explaining the transformer winding deformation tester calibrating device in detail, it is necessary to further explain the related materials mentioned in the utility model to achieve better effect. The utility model discloses in:
the calibrated instrument is a tested winding deformation tester 1, the to-be-calibrated parameter is an amplitude value output by the tested winding deformation tester 1, the unit is dB, and the expression formula is as follows:
after the related concepts are known, the calibration device for the transformer winding deformation tester can be known. The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, an embodiment of the present invention provides a transformer winding deformation tester calibration apparatus, which includes: the winding deformation tester comprises a controller, a power divider 3 and an attenuator, wherein the controller is connected to the attenuator, the power divider 3 comprises an input port, a first output port and a second output port, the input port is connected to the output end of the winding deformation tester to be tested, the first output port is connected to the reference end of the winding deformation tester 1 to be tested, the input end of the attenuator is connected to the second output port, and the output end of the attenuator is connected to the response end of the winding deformation tester 1 to be tested.
The working process of the calibration device of the transformer winding deformation tester is as follows:
the output end of the winding deformation tester 1 to be tested generates a frequency sweep signal, the frequency sweep mode is linear scanning or logarithmic scanning, the frequency sweep signal enters the power divider 3, the power divider 3 divides an input signal equally, and the two equally divided signals have isolation, so that the two signals of the reference end and the corresponding end cannot form mutual interference due to impedance change. One path of the equally divided signals directly returns to the reference end of the tested winding deformation tester 1, and the other path of the signals returns to the response end of the tested winding deformation tester 1 through the attenuator.
The technical scheme of the utility model, this device has carried out the shut to the output signal of being tried winding deformation tester 1 to guarantee to be tried winding deformation tester 1's output, corresponding end and the frequency uniformity of reference end three routes signal.
Specifically, the device uses the power divider 3 to equally divide the signal power sent by the tested winding deformation tester 1, and the divided signal power is used as a signal source, so that an internal signal source is not required to be arranged, the structure is simple, and the equipment cost and the complexity are reduced.
Specifically, the device further comprises a power supply 10, and the power supply 10 is connected to the controller. The power supply 10 converts the incoming mains supply into a dc voltage matched to the controller.
As shown in fig. 1, in the specific embodiment, the winding deformation tester further includes a limiter 2, an input end of the limiter 2 is connected to an output end of the winding deformation tester 1 to be tested, and an output end of the limiter 2 is connected to the input port.
In the embodiment, specifically, the sweep frequency signal enters the amplitude limiter 2 through the output end of the tested winding deformation tester 1, and the amplitude limiter 2 limits the amplitude value of the sweep frequency signal, so as to prevent overload of the rear-end precision resistor device caused by an excessively large amplitude value.
As shown in fig. 1, in the embodiment, the controller includes a touch display 7, a single board computer 6 and a relay, the touch display 7, the single board computer 6, the relay and the attenuator are connected in sequence, and a power supply 10 is connected to the single board computer 6 and the relay respectively.
Specifically, the touch display screen 7 includes a parameter input module for receiving parameter information preset by a calibrating person, automatically converting the parameter information into corresponding basic information, and transmitting the basic information to the controller. When the attenuator is used, a verification person sets the attenuation of the attenuator through the touch display screen 7, and then the attenuator is controlled through the controller.
In the present embodiment, the single board computer 6 specifically includes an integrated circuit board, the model of which is P89C51RA2BA/01, and the relay is driven using the integrated circuit to control the attenuation amount of the attenuator.
As shown in fig. 1, in the embodiment, the relay includes a first relay 8 and a second relay 9, the attenuator includes a first attenuator 4 and a second attenuator 5 connected to each other, the first attenuator 4 is connected to the second output port, the second attenuator 5 is connected to the response end of the tested winding deformation tester 1, the single board computer 6, the first relay 8 and the first attenuator 4 are connected in sequence, the single board computer 6, the second relay 9 and the second attenuator 5 are connected in sequence, and the power supply 10 is connected to the first relay 8 and the second relay 9 respectively.
In the present embodiment, specifically, the output terminals of the integrated circuit board in the single board computer 6 are connected to the coil of the first relay 8 and the coil of the second relay 9, respectively, so as to achieve the purpose of simplifying the driving of the two relays using the integrated circuit. The first relay 8 controls the first attenuator 4 and the second relay 9 controls the second attenuator 5.
Specifically, the power supply 10 converts the input commercial power into three dc voltages of +24V, ± 12V and +5V, and supplies power to the single board computer 6, the first relay 8 and the second relay 9.
In a specific embodiment, the first attenuator 4 is of type 8496G and the second attenuator 5 is of type 8494G.
In the present embodiment, specifically, the first attenuator 4 has a model number of 8496G, and its frequency range: DC is stepped to 4GHz, 0-110dB and 10dB, so that the dynamic adjusting range of the device is increased; the second attenuator 5 is model 8494G, its frequency range: DC to 4GHz, 0-11dB, 1dB step, is used for detecting the resolving power of the winding deformation tester 1 tested under the condition of 1dB change, and provides the output precision not lower than 0.5 dB. The two-stage programmable attenuator can meet the requirements of a dynamic range and 1dB variable quantity, and is convenient to trace.
In a specific embodiment, the limiter 2 has a model number of 11867a, and the power divider 3 has a model number of 11667B.
In the present embodiment, specifically, the model of the limiter 2 is 11867a, and the frequency range is: DC is up to 1.8GHz, the maximum continuous input RF power is 10W, the limit threshold value is 0dBm, and the damage caused by overload of precision resistance devices such as a rear-end power divider 3 and an attenuator due to overlarge amplitude output by the tested winding deformation tester 1 is prevented. The model of the power divider 3 is 11667B, and the frequency range is as follows: DC to 26.5GHz, equivalent output standing wave ratio: 1.22, input power: 0.5W, insertion loss: 7dB, tracking between two ports: 0.25dB to 18GHz, 0.40dB to 26.5 GHz; the two output signals output by the first output port and the second output port of the power divider 3 have isolation, so that mutual interference between the two output signals is reduced.
As shown in fig. 1, in the embodiment, the device further includes a housing 11, and the housing 11 is provided with a ground terminal 12.
In the present embodiment, specifically, the material of the housing 11 is aluminum alloy, and the housing 11 is grounded through the ground terminal 12, so that the electromagnetic compatibility of the device is enhanced.
As shown in fig. 1, in the embodiment, a cooling fan 13 is further included, the cooling fan 13 is mounted on the housing 11, and the cooling fan 13 is electrically connected to the power supply 10 for generating a cooling air flow.
In the present embodiment, specifically, the cooling fan 13 generates a cooling airflow to cool down the electrical components in the present apparatus, so as to avoid burning and damage of the components.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a transformer winding warp tester calibrating device which characterized in that includes:
the winding deformation tester comprises a controller, a power divider and an attenuator, wherein the controller is connected to the attenuator, the power divider comprises an input port, a first output port and a second output port, the input port is connected to the output end of the winding deformation tester to be tested, the first output port is connected to the reference end of the winding deformation tester to be tested, the input end of the attenuator is connected to the second output port, and the output end of the attenuator is connected to the response end of the winding deformation tester to be tested.
2. The calibration device for the transformer winding deformation tester according to claim 1, further comprising a limiter, wherein an input end of the limiter is connected to an output end of the tested winding deformation tester, and an output end of the limiter is connected to the input port.
3. The transformer winding deformation tester calibration device according to claim 1, wherein the controller comprises a touch display screen, a single board computer and a relay, and the touch display screen, the single board computer, the relay and the attenuator are connected in sequence.
4. The calibration device for the transformer winding deformation tester of claim 3, wherein the relay comprises a first relay and a second relay, the attenuator comprises a first attenuator and a second attenuator which are connected with each other, the first attenuator is connected to the second output port, the second attenuator is connected to the response end of the tested winding deformation tester, the single board computer, the first relay and the first attenuator are connected in sequence, and the single board computer, the second relay and the second attenuator are connected in sequence.
5. The transformer winding deformation tester calibration device according to claim 4, wherein the first attenuator is model 8496G and the second attenuator is model 8494G.
6. The transformer winding deformation tester calibration device according to claim 2, wherein the limiter is 11867A in type, and the power divider is 11667B in type.
7. The transformer winding deformation tester calibration device according to any one of claims 1 to 6, further comprising a housing, wherein the housing is provided with a ground terminal.
8. The transformer winding deformation tester calibration device according to claim 7, further comprising a cooling fan mounted to the housing for generating a cooling air flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922219688.3U CN211955792U (en) | 2019-12-11 | 2019-12-11 | Transformer winding deformation tester calibrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922219688.3U CN211955792U (en) | 2019-12-11 | 2019-12-11 | Transformer winding deformation tester calibrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211955792U true CN211955792U (en) | 2020-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922219688.3U Active CN211955792U (en) | 2019-12-11 | 2019-12-11 | Transformer winding deformation tester calibrating device |
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| CN (1) | CN211955792U (en) |
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2019
- 2019-12-11 CN CN201922219688.3U patent/CN211955792U/en active Active
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