CN212932921U - One-key type transformer hexagonal diagram rapid tester - Google Patents
One-key type transformer hexagonal diagram rapid tester Download PDFInfo
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- CN212932921U CN212932921U CN202021825465.8U CN202021825465U CN212932921U CN 212932921 U CN212932921 U CN 212932921U CN 202021825465 U CN202021825465 U CN 202021825465U CN 212932921 U CN212932921 U CN 212932921U
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Abstract
The utility model discloses a quick tester of a key formula transformer hexagonal picture, include the casing and install current test district, voltage test district, touch-sensitive screen, printer, the control system on the casing, current test district, voltage test district, touch-sensitive screen and printer are connected respectively to the control system, the utility model discloses accessible procedure calculated result improves the credibility of device calculated result. Meanwhile, errors caused by a large amount of manual calculation are avoided. The method realizes program drawing, makes the hexagonal graph more intuitive, facilitates quick judgment of field personnel, and timely discovers and processes the problems of transformer misoperation and the like caused by incorrect wiring. By means of communication technologies such as the Internet and the like, data storage, printing and uploading are achieved, and the direction measuring work of maintainers can be based on the data and can be traced.
Description
Technical Field
The utility model relates to a data test technical field specifically is a quick tester of a key formula transformer hexagonal picture.
Background
Differential protection is important protection of a transformer, and a wiring error can cause protection misoperation and refusal operation to cause or enlarge accidents. Therefore, after a newly-operated transformer or a secondary circuit of the transformer current is changed, the transformer protection is checked whether a differential current exists in the transformer protection after the transformer is loaded, the amplitude and the phase of the transformer protection current are measured, and a hexagonal diagram method is used for distinguishing so as to ensure the wiring correctness of the current circuit.
In the prior art, reference voltage is usually selected, a clamp-on ammeter is used for measuring current on each side of a transformer, a hexagonal diagram is drawn by hand according to the power transmitting and receiving directions, and theoretical analysis and measurement are manually carried out to give a conclusion. The scheme has low calculation progress, needs to spend a large amount of time and has low working efficiency. The manual calculation result is easy to generate errors and errors, the correctness of the conclusion is influenced, the hand-drawn hexagonal graph is not intuitive and is inconvenient to store, an electronic drawing file for the differential protection direction measurement of the transformer cannot be formed, and convenience cannot be provided for subsequent work.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a quick tester of a key formula transformer hexagonal picture to solve the problem of proposing among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a one-key transformer hexagonal diagram rapid tester comprises a shell, a current test area, a voltage test area, a touch screen, a printer and a control system, wherein the current test area, the voltage test area, the touch screen and the printer are installed on the shell, the control system is respectively connected with the current test area, the voltage test area, the touch screen and the printer, the control system comprises a TIF screen data display module, an analog-to-digital conversion module, a power supply voltage stabilization module, a data interface module, a Bluetooth printer module, a switching-on/off input module, a lithium battery management module, a central processing unit module, a channel switching module, a data storage module, a 4G communication module and a voltage current acquisition module, the central processing unit module is respectively connected with the TIF screen data display module, the analog-to-digital conversion module, the power supply voltage stabilization module, the data interface module, the Bluetooth printer module, the, The data storage module and the 4G communication module, the analog-to-digital conversion module is also connected with the voltage and current acquisition module.
As a further technical solution of the present invention: the central processing unit module adopts STM32-103V8T6 chips.
As a further technical solution of the present invention: the input voltage of the power supply voltage stabilizing module is 7V, and the output voltage is 5.5V, 5V and 3.3V.
As a further technical solution of the present invention: the touch screen is a 7-inch touch screen.
As a further technical solution of the present invention: the voltage and current acquisition module comprises a transformer, a current transformer and a voltage transformer.
As a further technical solution of the present invention: the analog-to-digital conversion module adopts an AD7606_4 chip.
As a further technical solution of the present invention: the method also comprises a testing method, comprising the following steps: measurement A, B, C vs N voltage: u shapeAN=57.7V，UBN=57.7V，UCN=57.7V, and the determination condition that the detection result is qualified is 57.7 ± 2.5% V; the second step is that: measuring A, B, C three phase voltage: u shapeAB=100V，UBC=100V，UCA=100V, and the determination condition that the detection result is qualified is 100 ± 2.5% V; the third step: measuring the voltage of N to the ground: u shapeN1=0V, the determination condition for the qualified detection result, 0 ± 2.5% V; the fourth step: and (3) measuring the phase sequence: a → B → C, positive phase sequence, the judgment condition of qualified detection result, positive phase sequence; the fifth step: measuring a phase angle: u shapeA=0°，UB=240°，UCOver =120 degrees, and the phase angle is ≈ U under the qualified judgment condition of the detection resultA=0±5°，∠UB=240±5°，∠UC=120 ± 5 °; and a sixth step: measuring the current value of the high-voltage side of the transformer by using a clamp type current sensor: i isAMeasured value, IBMeasured value, ICMeasuring, and a seventh step: by UAMeasuring U with the measuring angle as referenceAIAAngle, UAIBAngle, UAICAngle, the eighth step: printing and uploading the cloud server, and a ninth step: editing and modifying the uploading record through the mobile phone APP, the tenthThe method comprises the following steps: and (5) vector synthesis.
As a further technical solution of the present invention: the eighth step is specifically: test data are uploaded to the cloud server through the 4G card in the device, and query of the test data is facilitated.
As a further technical solution of the present invention: the ninth step is specifically: and building APP software of a transformer hexagonal diagram measuring mobile phone, editing the transformation ratio of the current transformer at each side of the transformer, and converting the transformation ratio into the actual current value at each side of the transformer. The vector synthesis of the transformer is facilitated.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses accessible procedure calculated result improves the credibility of device calculated result. Meanwhile, errors caused by a large amount of manual calculation are avoided. The method realizes program drawing, makes the hexagonal graph more intuitive, facilitates quick judgment of field personnel, and timely discovers and processes the problems of transformer misoperation and the like caused by incorrect wiring. By means of communication technologies such as the Internet and the like, data storage, printing and uploading are achieved, and the direction measuring work of maintainers can be based on the data and can be traced.
Drawings
FIG. 1 is a general schematic diagram of the present invention;
FIG. 2 is a schematic diagram of a test method;
FIG. 3 is a test flow diagram;
FIG. 4 is a circuit diagram of a TIF panel data display module;
FIG. 5 is a circuit diagram of an analog-to-digital conversion module;
FIG. 6 is a circuit diagram of a power supply regulation module;
FIG. 7 is a circuit diagram of a data interface module;
FIG. 8 is a circuit diagram of a Bluetooth printer module;
FIG. 9 is a circuit diagram of an on/off input module;
FIG. 10 is a circuit diagram of a lithium battery management module;
FIG. 11 is a circuit diagram of a central processor module;
FIG. 12 is a circuit diagram of a channel switching module;
FIG. 13 is a circuit diagram of a data storage module;
fig. 14 is a circuit diagram of a 4G communication module;
fig. 15 is a circuit diagram of a voltage current collection module.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, embodiment 1: a one-key transformer hexagonal diagram rapid tester comprises a shell, a current test area, a voltage test area, a touch screen, a printer and a control system, wherein the current test area, the voltage test area, the touch screen and the printer are installed on the shell, the control system is respectively connected with the current test area, the voltage test area, the touch screen and the printer, the control system comprises a TIF screen data display module, an analog-to-digital conversion module, a power supply voltage stabilization module, a data interface module, a Bluetooth printer module, a switching-on/off input module, a lithium battery management module, a central processing unit module, a channel switching module, a data storage module, a 4G communication module and a voltage current acquisition module, the central processing unit module is respectively connected with the TIF screen data display module, the analog-to-digital conversion module, the power supply voltage stabilization module, the data interface module, the Bluetooth printer module, the, The data storage module and the 4G communication module, the analog-to-digital conversion module is also connected with the voltage and current acquisition module.
As shown in FIGS. 4-15, the specific circuitry for each module, the CPU module employs STM32-103V8T6 chips. The input voltage of the power supply voltage stabilizing module is 7V, and the output voltage is 5.5V, 5V and 3.3V. The touch screen is a 7-inch touch screen. The voltage and current acquisition module comprises a transformer, a current transformer and a voltage transformer. The analog-to-digital conversion module adopts an AD7606_4 chip.
The testing method of the utility model is as follows, as shown in figure 2,
(1) phase correction and amplitude correction of the current flowing into each side transformer differential circuit.
Based on the connection form of the transformer and the star-delta conversion of voltage and current, the amplitude difference and the phase difference of each side are analyzed, the influence of a corner is eliminated by taking the star side or the corner side as a reference, and the phase or the amplitude of the current of the differential circuit of the transformer is corrected, so that the differential current of the differential circuit of the transformer is calculated. The program can realize the correction in two modes, and the correctness of the differential flow calculation is compared through two calculation results with different principles, so that the algorithm is simplified, and the processing precision is improved.
(2) And eliminating the influence of the zero-sequence current component in the differential circuit.
Angular connection can occur on the low-voltage side of the transformer, and the zero-sequence current component forms circulation, so that the current inconsistency between the high-medium-voltage side and the low-voltage side is influenced, the error of differential current calculation is eliminated through program design, and the differential current calculation precision and accuracy are improved.
(3) And (3) acquiring and optimizing the minimized electrical quantity in the direction of the differential protection measurement of the transformer.
Because the differential protection current magnitude of the transformer relates to each side of the transformer, the power transmission mode of the middle-low voltage side is comprehensively considered, the voltage of the high-voltage side and the current of each side of the transformer are selected to reflect the electric quantity information and the minimum electric quantity acquisition of the differential current, the information acquisition process is optimized, and the calculation and the conclusion are convenient to give.
(4) And an optimized man-machine mode is adopted, so that the rapid acquisition of data and the visual display of a conclusion are realized. Through thing networking communication mode, realize the storage of information and upload fast, improve power transmission efficiency.
In order to improve the practicability and the aesthetic property of the device, an optimized human-computer interface is designed by considering the realization of the function of the device, the volume and the portability of the device. The existing chip is utilized to realize program drawing, visual display is carried out through the difference of yellow, green and red colors and the marking of amplitude angles, and workers can judge according to the diagram, so that the accuracy is improved. And the storage, printing and uploading of data are realized by using network technologies such as 4G and the like. And the device Internet of things function is enriched.
Specifically comprises the following steps, for exampleFig. 3, first step: measurement A, B, C vs N voltage: u shapeAN=57.7V，UBN=57.7V，UCN=57.7V, and the determination condition that the detection result is qualified is 57.7 ± 2.5% V; the second step is that: measuring A, B, C three phase voltage: u shapeAB=100V，UBC=100V，UCA=100V, and the determination condition that the detection result is qualified is 100 ± 2.5% V; the third step: measure N voltage to ground (open triangle): u shapeN1=0V, the determination condition for the qualified detection result, 0 ± 2.5% V; the fourth step: and (3) measuring the phase sequence: a → B → C, positive phase sequence, the judgment condition of qualified detection result, positive phase sequence; the fifth step: measuring a phase angle: u shapeA=0°，UB=240°，UCOver =120 degrees, and the phase angle is ≈ U under the qualified judgment condition of the detection resultA=0±5°，∠UB=240±5°，∠UC=120 ± 5 °; and a sixth step: measuring the current value of the high-voltage side of the transformer by using a clamp type current sensor: i isAMeasured value, IBMeasured value, ICMeasured value (current value is 5A at most), seventh step: by UAMeasuring U with the measuring angle as referenceAIAAngle, UAIBAngle, UAICAngle, the eighth step: print and upload cloud server, through 4G card in the device, upload the test data to cloud server, the inquiry of the test data of being convenient for, the ninth step: editing and modifying uploading records through a mobile phone APP, building transformer hexagonal graph measuring mobile phone APP software, editing the transformation ratio of a current transformer on each side of a transformer, and converting the transformation ratio into the actual current value of each side of the transformer. The vector synthesis of the transformer is facilitated, and the tenth step is as follows: and vector synthesis, namely synthesizing by using a vector synthesis formula.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. A one-key transformer hexagonal diagram rapid tester comprises a shell, a current test area, a voltage test area, a touch screen, a printer and a control system, wherein the current test area, the voltage test area, the touch screen and the printer are installed on the shell, the control system is connected with the current test area, the voltage test area, the touch screen and the printer respectively, the control system comprises a TIF screen data display module, an analog-to-digital conversion module, a power voltage stabilizing module, a data interface module, a Bluetooth printer module, an on-off input module, a lithium battery management module, a central processing unit module, a channel switching module, a data storage module, a 4G communication module and a voltage current acquisition module, the central processing unit module is connected with the TIF screen data display module, the analog-to-digital conversion module, the power voltage stabilizing module, the data interface module, the Bluetooth printer module, the on-off input module, The device comprises a channel switching module, a data storage module and a 4G communication module, and the analog-to-digital conversion module is also connected with a voltage and current acquisition module.
2. The one-key transformer hexagonal diagram rapid tester of claim 1, wherein the central processor module adopts an STM32-103V8T6 chip.
3. The one-button transformer hexagonal diagram rapid tester according to claim 2, wherein the input voltage of the power supply voltage stabilization module is 7V, and the output voltage is 5.5V, 5V and 3.3V.
4. The one-button transformer hexagonal diagram rapid tester according to claim 1, wherein the touch screen is a 7-inch touch screen.
5. The one-button transformer hexagonal drawing rapid tester according to claim 1, wherein the voltage and current acquisition module comprises a transformer, a current transformer and a voltage transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021825465.8U CN212932921U (en) | 2020-08-27 | 2020-08-27 | One-key type transformer hexagonal diagram rapid tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021825465.8U CN212932921U (en) | 2020-08-27 | 2020-08-27 | One-key type transformer hexagonal diagram rapid tester |
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| Publication Number | Publication Date |
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| CN212932921U true CN212932921U (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021825465.8U Expired - Fee Related CN212932921U (en) | 2020-08-27 | 2020-08-27 | One-key type transformer hexagonal diagram rapid tester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113872150A (en) * | 2021-09-23 | 2021-12-31 | 国网山东省电力公司淄博供电公司 | Vector synthesis algorithm and detection device for main transformer differential protection hexagonal graph based on differential flow calculation |
-
2020
- 2020-08-27 CN CN202021825465.8U patent/CN212932921U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113872150A (en) * | 2021-09-23 | 2021-12-31 | 国网山东省电力公司淄博供电公司 | Vector synthesis algorithm and detection device for main transformer differential protection hexagonal graph based on differential flow calculation |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210409 |