CN219978510U - Device for consistency inspection of current transformer - Google Patents
Device for consistency inspection of current transformer Download PDFInfo
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- CN219978510U CN219978510U CN202321588856.6U CN202321588856U CN219978510U CN 219978510 U CN219978510 U CN 219978510U CN 202321588856 U CN202321588856 U CN 202321588856U CN 219978510 U CN219978510 U CN 219978510U
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- 238000007689 inspection Methods 0.000 title abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 41
- 238000004891 communication Methods 0.000 claims abstract description 15
- 238000004364 calculation method Methods 0.000 claims abstract description 14
- 230000002452 interceptive effect Effects 0.000 claims abstract description 3
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 2
- 238000012795 verification Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 description 21
- 238000009826 distribution Methods 0.000 description 7
- 230000001360 synchronised effect Effects 0.000 description 7
- 238000012544 monitoring process Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
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Abstract
The utility model relates to a device for consistency inspection of a current transformer, which comprises a reference transformer, a plurality of independent transformers to be tested, a power supply unit, a multichannel test unit, a consistency calculation unit and an Ethernet communication unit, wherein the output ends of the reference transformers are connected with the input ends of the current transformer connection unit, the output ends of the current transformer to be tested are connected with the input ends of the multichannel test unit, the output ends of the multichannel test unit are connected with the input ends of the consistency calculation unit, the output ends of the consistency calculation unit are connected with the input ends of the Ethernet communication unit, the Ethernet communication unit is in interactive connection with an upper computer, and the output ends of the power supply unit are connected with the multichannel test unit, the consistency calculation unit and the power supply end of the Ethernet communication unit. The utility model can rapidly select out the consistent mutual inductor, thereby improving the yield and the production efficiency.
Description
Technical Field
The utility model relates to a device for consistency inspection of a current transformer.
Background
With the rapid development of domestic power systems and the access of various new energy sources, distribution networks become more and more complex, and higher requirements are put forward on real-time dynamic safety monitoring of the distribution networks. The Wide Area Measurement System (WAMS) of the distribution network is used as a novel and effective monitoring system, and provides a new direction for the monitoring technology of the distribution network by synchronously collecting phasor data. The synchronous phasor measurement device (PMU) of the distribution network is a basic unit of a wide area measurement system of the distribution network, and the measurement accuracy directly influences the accuracy of dynamic monitoring and analysis of the distribution network. Synchronous phasor measurement devices (PMUs) therefore present a strict indicator of measurement consistency. Typically, the current measurement accuracy of a synchrophasor measurement unit (PMU) is up to 0.5 level, and the synchronization accuracy is less than 10us.
The patent is searched: an automatic detection system and method (CN 201410796782.4) of a synchrophasor measurement device, the system comprising a test background server, a switch, a network tester, an OMICRON tester and a time synchronization system; the network tester and the OMICRON tester all exchange data with the test background server through the exchanger, the test background server communicates with the synchronous phasor measurement device through a network protocol, and meanwhile time synchronization between the test background server and the synchronous phasor measurement device and between the test background server and the OMICRON tester is realized through a time synchronization system. The utility model can realize automatic generation of test tasks, automatic execution of detection steps and automatic generation of detection reports, reduce artificial factor interference, eliminate test randomness, improve test efficiency and test reliability, realize test repeatability, ensure traceability of test work and ensure reliability and consistency of test results.
However, in the current production test, the basic performance test is firstly carried out on a circuit board of a synchronous Phasor Measurement Unit (PMU), and the consistent performance test of the measurement precision and the synchronous precision of the whole machine is carried out after the circuit board is assembled into the whole machine. Screening out devices meeting the consistency index and eliminating devices with large differences. Most of devices with poor consistency are caused by measuring transformers in actual production, and the consistency of the performance of the transformers cannot be ensured by adopting a single product inspection method adopted by the existing measuring transformers, so that reworking is caused in a production link, and labor time is wasted.
In view of the above-mentioned drawbacks, the present inventors have actively studied and innovated to create a device for consistency inspection of current transformers, which can rapidly detect current transformers meeting the index, so as to have industrial utility value.
Disclosure of Invention
In order to solve the technical problems, the utility model aims to provide a device for consistency inspection of a current transformer.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a device for current transformer uniformity inspection, includes the reference transformer, still includes a plurality of independent mutual-inductors that await measuring, the output of reference transformer links to each other with the input of current transformer connecting unit, and a plurality of the output of mutual-inductor that awaits measuring links to each other with the input of current transformer connecting unit, the output of current transformer connecting unit links to each other with the input of multichannel test unit, the output of multichannel test unit links to each other with the input of uniformity calculation unit, the output of uniformity calculation unit links to each other with the input of ethernet communication unit, ethernet communication unit and host computer interconnect, still including power supply unit, the output of power supply unit links to each other with multichannel test unit, uniformity calculation unit and ethernet communication unit's power supply end.
Preferably, the multi-path test unit is an 8-path test unit, wherein the first path is connected with a reference transformer, and the other paths are connected with corresponding transformers to be tested.
Preferably, the device for consistency test of the current transformer is characterized in that the multichannel test unit adopts a digital-to-analog conversion chip, and the model number of the multichannel test unit is ADS8864.
Preferably, the device for consistency check of the current transformer is characterized in that the consistency calculating unit adopts a chip with the model number of AM 1806.
Preferably, the power supply unit is a rechargeable storage battery.
By means of the scheme, the utility model has at least the following advantages:
according to the utility model, the current transformers meeting the consistency requirement are selected by carrying out current amplitude and phase tests on the current transformers to be tested and the reference current transformers and carrying out consistency comparison on the measurement results of the current transformers to be tested and the reference current transformers, so that the yield is greatly improved, 7 transformers to be tested can be tested at one time, the production efficiency is effectively improved, and the cost is reduced.
The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Examples
As shown in fig. 1, a device for consistency check of a current transformer comprises a reference transformer 1, and further comprises a plurality of independent transformers 2 to be tested, wherein the output end of the reference transformer 1 is connected with the input end of a current transformer connecting unit 3, the output ends of the transformers 2 to be tested are connected with the input end of the current transformer connecting unit 3, the output end of the current transformer connecting unit 3 is connected with the input end of a multi-channel testing unit 4, the output end of the multi-channel testing unit 4 is connected with the input end of a consistency calculating unit 5, the output end of the consistency calculating unit 5 is connected with the input end of an ethernet communication unit 6, the ethernet communication unit 6 is in interactive connection with an upper computer 7, and the device further comprises a power supply unit 8, and the output end of the power supply unit 8 is connected with the multi-channel testing unit 4, the consistency calculating unit 5 and the power supply end of the ethernet communication unit 6.
The multi-path test unit 4 is an 8-path test unit, wherein a first path is connected with a reference transformer (a current transformer set by a person skilled in the art) 1, and other paths are connected with corresponding transformers 2 to be tested, wherein the multi-path test unit 4 adopts a digital-to-analog conversion chip, and the model is ADS8864.
And simultaneously measuring the phases and the amplitudes of the reference transformer and the transformer to be measured by a multi-channel measuring unit. The multi-path measurement unit supports 8-path measurements, where the first path is used for reference transformers and paths 2-8 are used for current transformers to be tested, enabling 7 transformers to be tested at a time.
The chip used in the ethernet communication unit 6 in the present utility model is a chip known in the art, for example: RTL8152B.
The consistency calculation unit 5 in the present utility model adopts a chip with the model number of AM 1806.
The power supply unit 8 is a rechargeable battery in the present utility model.
According to the utility model, the consistency calculation unit is used for carrying out consistency calculation on the amplitude values and the phases of the reference transformer and the transformer to be measured, which are measured by the multichannel measurement unit, so as to calculate measurement errors and synchronization errors, and outputting the results to the upper computer.
And the upper computer displays the measurement results of the mutual inductors to be measured, and the PASS or FAIL is directly displayed.
The multichannel measuring unit mainly has the functions of processing and sampling signals of the current transformers, and the multichannel digital-to-analog conversion chip ADS8864 with 16 bits is adopted in the multichannel measuring unit, so that the output signals of 8 current transformers can be sampled and measured at the same time, and the measuring efficiency is greatly improved.
The main function of the consistency calculating unit 5 is to perform synchronous FFT calculation on 8 paths of measurement data, calculate the phase and amplitude of each path of current, and the consistency calculating unit adopts an AM1806 high-performance processor.
The specific calculation method of the consistency calculation unit 5 in the utility model comprises the following steps: and calculating the amplitude and the phase of the 8-path measurement data of one cycle at the same time, and then calculating the amplitude and the phase error values of the paths 2-7 and the path 1 respectively. Wherein, the amplitude error is set to 0.5%, and the phase error is set to 0.2 degrees. And meanwhile, the current transformer to be tested which meets the requirement that the amplitude error and the phase error are smaller is judged to be qualified, otherwise, the current transformer to be tested is judged to be unqualified.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "vertical", "horizontal", "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that is conventionally put in use of the product of this application, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or vertical, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, and it should be noted that it is possible for those skilled in the art to make several improvements and modifications without departing from the technical principle of the present utility model, and these improvements and modifications should also be regarded as the protection scope of the present utility model.
Claims (5)
1. Device for consistency verification of current transformers, comprising a reference transformer (1), characterized in that: the intelligent transformer testing device is characterized by further comprising a plurality of independent transformers to be tested (2), wherein the output end of the reference transformer (1) is connected with the input end of the current transformer connecting unit (3), the output end of the transformers to be tested (2) is connected with the input end of the current transformer connecting unit (3), the output end of the current transformer connecting unit (3) is connected with the input end of the multichannel testing unit (4), the output end of the multichannel testing unit (4) is connected with the input end of the consistency calculating unit (5), the output end of the consistency calculating unit (5) is connected with the input end of the Ethernet communication unit (6), the Ethernet communication unit (6) is connected with the upper computer (7) in an interactive mode, and the intelligent transformer testing device further comprises a power supply unit (8), and the output end of the power supply unit (8) is connected with the multichannel testing unit (4), the consistency calculating unit (5) and the power supply end of the Ethernet communication unit (6).
2. An apparatus for current transformer consistency check as claimed in claim 1, wherein: the multi-channel test unit (4) is an 8-channel test unit, wherein a first channel is connected with the reference transformer (1), and other channels are connected with the corresponding transformers (2) to be tested.
3. An apparatus for current transformer consistency check according to claim 1 or 2, characterized in that: the multichannel test unit (4) adopts a digital-to-analog conversion chip, and the model of the multichannel test unit is ADS8864.
4. An apparatus for current transformer consistency check as claimed in claim 1, wherein: the consistency calculation unit (5) adopts a chip with the model number of AM 1806.
5. An apparatus for current transformer consistency check as claimed in claim 1, wherein: the power supply unit (8) is a chargeable storage battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321588856.6U CN219978510U (en) | 2023-06-21 | 2023-06-21 | Device for consistency inspection of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321588856.6U CN219978510U (en) | 2023-06-21 | 2023-06-21 | Device for consistency inspection of current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219978510U true CN219978510U (en) | 2023-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321588856.6U Active CN219978510U (en) | 2023-06-21 | 2023-06-21 | Device for consistency inspection of current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219978510U (en) |
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2023
- 2023-06-21 CN CN202321588856.6U patent/CN219978510U/en active Active
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