CN212781195U - Wireless secondary voltage drop on-site tester - Google Patents
Wireless secondary voltage drop on-site tester Download PDFInfo
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- CN212781195U CN212781195U CN202020746747.2U CN202020746747U CN212781195U CN 212781195 U CN212781195 U CN 212781195U CN 202020746747 U CN202020746747 U CN 202020746747U CN 212781195 U CN212781195 U CN 212781195U
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- 238000004891 communication Methods 0.000 claims abstract description 48
- 238000005070 sampling Methods 0.000 claims abstract description 32
- 238000012360 testing method Methods 0.000 claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
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Abstract
The utility model discloses a wireless secondary pressure drop on-site tester, which comprises an extension connected with a voltage transformer and a host connected with an electric energy meter of a substation control room, wherein the extension comprises a first AD sampling module, a first main control module, a first storage module, a first power supply module and a first wireless communication module; the host includes: the second AD sampling module, the second main control module, the second storage module, the second power module and the second wireless communication module. The utility model discloses a host computer and extension that set up wireless communication come the exchange data, can avoid needing secondary long distance unwrapping wire, wiring, the work of receiving the line when carrying out the secondary pressure drop test at present, have improved site work efficiency, have also reduced site work's safe risk, make site test pressure drop work safe more convenient.
Description
Technical Field
The utility model relates to a secondary pressure drop test technical field, in particular to wireless secondary pressure drop field test appearance.
Background
The metering error caused by the voltage drop of the secondary lead of the voltage transformer is usually the largest of the comprehensive errors of electric energy metering, so the measurement must be accurate, rapid, convenient and reliable. The traditional method for testing the secondary voltage drop of the metering voltage transformer generally adopts a method of externally matching an isolation PT (voltage transformer) and a secondary cable car by a secondary voltage drop testing calibrator, and the method for testing the secondary voltage drop of the PT mainly has the following problems: the wiring is complex; the secondary trolley conductor resistance will introduce additional measurement errors.
Thus, the prior art has yet to be improved and enhanced.
SUMMERY OF THE UTILITY MODEL
In view of the foregoing prior art's weak point, an object of the utility model is to provide a wireless secondary pressure drop field test appearance can avoid needing secondary long distance unwrapping wire, wiring, the work of receiving the line when carrying out the secondary pressure drop test at present, has improved field work efficiency.
In order to achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a wireless secondary voltage drop field test appearance which characterized in that, the extension of being connected with voltage transformer and the host computer of being connected with transformer substation control room electric energy meter, wherein, the extension includes:
the first AD sampling module is used for acquiring an analog signal of the voltage at the output end of the voltage transformer, performing analog-to-digital conversion and outputting a first digital signal;
the first main control module is used for processing the first digital signal output after the analog-to-digital conversion;
the first storage module is used for storing data obtained after the first main control module processes the first digital signal;
the first power supply module is used for supplying power to each power utilization element of the extension;
the first wireless communication module is used for communicating with the host and outputting a first digital signal processed by the first main control module to the host;
the first AD sampling module, the first storage module, the first power supply module and the first wireless communication module are all connected with the first main control module, and the first power supply module is also connected with the first AD sampling module, the first storage module and the first wireless communication module;
the host includes:
the second AD sampling module is used for acquiring an analog signal of the voltage at the side of the electric energy meter, performing analog-to-digital conversion and outputting a second digital signal;
the second main control module is used for processing the output second digital signal after the analog-digital conversion;
the second storage module is used for storing data obtained after the second main control module processes the second digital signal;
the second power supply module is used for providing power for each electric element of the host;
the second wireless communication module is used for communicating with the extension set and receiving the processed first digital signal output by the first wireless communication module;
second AD sampling module, second storage module, second power module and second wireless communication module all connect second host system, second power module still connects second AD sampling module, second storage module and second wireless communication module.
Compared with the prior art, the utility model provides a wireless secondary pressure drop field test appearance comes exchange data through the host computer and the extension that set up wireless communication, can avoid at present needing secondary long distance unwrapping wire, wiring, the work of receiving the line when carrying out secondary pressure drop test, has improved field work efficiency, has also reduced field work's safe risk, makes field test pressure drop work safe convenient more.
Drawings
Fig. 1 is a block diagram of a preferred embodiment of the wireless secondary voltage drop field tester provided by the present invention;
fig. 2 is a block diagram of a preferred embodiment of the extension set in the wireless secondary voltage drop field tester provided by the present invention;
fig. 3 is a block diagram of a preferred embodiment of the host in the wireless secondary voltage drop field tester provided by the present invention.
Detailed Description
The utility model provides a wireless secondary pressure drop field test appearance, for making the utility model discloses a purpose, technical scheme and effect are clearer, clear and definite, and it is right that the embodiment is lifted to follow with reference to the attached drawing the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
It will be understood that when an element is referred to as being "on," "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.
Referring to fig. 1 to 3, the wireless secondary voltage drop field tester provided in an embodiment of the present invention includes an extension 1 connected to a voltage transformer and a host 2 connected to an electric energy meter in a substation control room, where the extension 1 and the host 2 are in communication connection and can exchange data, where the extension 1 includes a first AD sampling module 11, a first master control module 12, a first storage module 13, a first power module 14, and a first wireless communication module 15, the first AD sampling module 11, the first storage module 13, the first power module 14, and the first wireless communication module 15 are all connected to the first master control module 12, and the first power module 14 is further connected to the first AD sampling module 11, the first storage module 13, and the first wireless communication module 15. Host 2 includes second AD sampling module 21, second host system 22, second storage module 23, second power module 24 and second wireless communication module 25, second AD sampling module 21, second storage module 23, second power module 24 and second wireless communication module 25 all connect second host system 22, second power module 24 still connects second AD sampling module 21, second storage module 23 and second wireless communication module 25.
Specifically, the first AD sampling module 11 is configured to acquire an analog signal of a voltage at an output terminal of the voltage transformer, perform analog-to-digital conversion, and output a first digital signal; the first main control module 12 is configured to process the output first digital signal after the analog-to-digital conversion; the first storage module 13 is configured to store data obtained after the first main control module 12 processes the first digital signal; the first power supply module 14 is used for supplying power to each power-using element of the extension 1; the first wireless communication module 15 is configured to communicate with the host 2, and output the first digital signal processed by the first main control module 12 to the host 2.
The second AD sampling module 21 is configured to acquire an analog signal of the voltage at the side of the electric energy meter, perform analog-to-digital conversion, and output a second digital signal; the second main control module 22 is configured to process the output second digital signal after the analog-to-digital conversion; the second storage module 23 is configured to store data obtained after the second main control module 22 processes the second digital signal; the second power module 24 is used for providing power for each electric element of the host 2; the second wireless communication module 25 is configured to communicate with the extension 1, and receive the processed first digital signal output by the first wireless communication module 15.
Specifically, the invention changes the current wiring test into two devices, carries out communication through a wireless communication device, transmits a data acquisition comparison mode between main machines to analyze secondary voltage drop data, and does not need the operation of placing, receiving and receiving a secondary cable car, thereby reducing the failure rate, reducing the error caused by leads and improving the efficiency and safety of field test operation. When the voltage amplitude and the phase position of the main machine 2 are tested on the electric energy meter side of the substation control room, the voltage amplitude and the phase position of the extension 1 are tested on the output end of the voltage transformer, the main machine 2 and the extension 1 send the voltage amplitude and the phase position information tested by the extension to the main machine 2 in a wireless communication mode, and the main machine 2 completes the voltage ratio difference and the crossing between the output ends of the electric energy meter and the voltage transformer, so that the secondary voltage drop test is realized, and the current work of secondary long-distance paying-off, wiring and taking-up during the secondary voltage drop test is avoided.
In a preferred embodiment, the first AD sampling module 11 and the second AD sampling module 21 both use AD sampling chips of model AD7606, the AD7606 chip can perform analog-to-digital conversion on input analog signals and then output digital signals to the first main control module 12 or the second main control module 13, in specific implementation, the V1, V2, and V3 of the AD7606 chip can be respectively connected to the three-phase output end of the voltage transformer or the electric energy meter, and the Dout _ a, BUSY, SCLK, CA, CS, and RESET ends of the two AD7606 chips can be respectively connected to the first main control module 12 and the second main control module 22, so that the converted first digital signals and second digital signals are respectively input to the first main control module 12 and the second main control module 22. In addition, it should be further explained that the first AD sampling module 11 and the second AD sampling module both further include a gear selector switch for direct measurement, so as to ensure the precision of the sampling transformer, so that the number of the secondary ATs of the transformer is within a certain range, and when the transformer needs to be provided with different windings, the gear selector switch can perform gear switching through the gear selector switch.
In a further embodiment, the first main control module 12 and the second main control module 22 both use DSP chips of the model number ADSP-21479, and in specific implementation, the port of the DSP chip is connected to the port _ a of the AD7606 chip, the port of the IRQ1 of the DSP chip is connected to the BUSY of the AD7606 chip, the port of the port _ SCLK of the DSP chip is connected to the SCLK of the AD7606 chip, the port of the FLAG4 of the DSP chip is connected to the CA of the AD7606 chip, the port of the DSP chip is connected to the CS of the AD7606 chip, the port of the FLAG5 of the DSP chip is connected to the RESET of the AD7606 chip, the DSP chip can control the sampling mode of the AD7606 chip, and the DSP chip is configured to process and output digital signals input by the AD7606 chip and store the processed data in the storage module.
In a further embodiment, each of the first storage module 13 and the second storage module 23 includes an EEprom unit and an SD card, the EEprom unit is an AT24C256 chip, the EEprom unit and the SD card are both connected to the DSP chip, the SD card is a 4G card, the EEprom unit is used for storing a program and is connected to an IO port of the DSP chip through an I2C line, and the SD card is used for storing data obtained by processing a digital signal by the DSP chip and is in communication connection with the SD chip.
In a further embodiment, the first power module 14 and the second power module 24 both use isolated power for supplying power to the respective power consuming components of the host 2 and the extension 1, and the specific circuit of the isolated power is a common DC-DC power module, which is not described in detail herein.
IN a further embodiment, the first wireless communication module 15 and the second wireless communication module 25 each include an RS485 communication unit, a bluetooth communication unit and a GPS communication unit, the bluetooth communication unit may employ an existing bluetooth module (e.g., HHW-UART-M10-1) and is connected to the DSP chip through a bluetooth interface, the RS485 communication unit may employ a 485 communication chip and is connected to the DSP chip through a 485 bus, the GPS communication unit employs a GS-216 chip, uses a passive GPS antenna, and employs an integrated module to receive sky satellite signals, and is directly connected to the RF-IN pin of the module, which is simple IN structure, low IN integrated cost, mature IN technology, and small IN duty volume, for implementing data communication between the host 2 and the extension 1.
In a further embodiment, the wireless secondary voltage drop field tester further comprises a display module, wherein the display module is connected with the first main control module 13 and the second main control module 23 and is used for displaying test data of the extension 1 and the host 2 in real time and sending a test instruction to the extension 1 and the host 2, preferably, the display module is wirelessly connected with the first main control module 13 and the second main control module 23, and when the wireless secondary voltage drop field tester is specifically implemented, the display module can be a tablet computer or a palm computer, can set parameters and send the test instruction to the first main control module 13 and the second main control module 23, so that man-machine separation operation can be realized when the wireless secondary voltage drop field tester is used for carrying out wireless secondary voltage drop field test, the wireless secondary voltage drop field tester is suitable for places with poor surrounding optical fiber angles or severe environments, and personal safety is guaranteed.
To sum up, the utility model provides a wireless secondary pressure drop field test appearance comes exchange data through the host computer and the extension that set up wireless communication, can avoid at present needing secondary long distance unwrapping wire, wiring, the work of receiving the line when carrying out secondary pressure drop test, has improved field work efficiency, has also reduced field work's safe risk, makes field test pressure drop work safe convenient more.
It should be understood that equivalent alterations and modifications can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such alterations and modifications should fall within the scope of the appended claims.
Claims (7)
1. The utility model provides a wireless secondary voltage drop field test appearance which characterized in that, includes the extension of being connected with voltage transformer and the host computer of being connected with transformer substation control room electric energy meter, wherein, the extension includes:
the first AD sampling module is used for acquiring an analog signal of the voltage at the output end of the voltage transformer, performing analog-to-digital conversion and outputting a first digital signal;
the first main control module is used for processing the first digital signal output after the analog-to-digital conversion;
the first storage module is used for storing data obtained after the first main control module processes the first digital signal;
the first power supply module is used for supplying power to each power utilization element of the extension;
the first wireless communication module is used for communicating with the host and outputting a first digital signal processed by the first main control module to the host;
the first AD sampling module, the first storage module, the first power supply module and the first wireless communication module are all connected with the first main control module, and the first power supply module is also connected with the first AD sampling module, the first storage module and the first wireless communication module;
the host includes:
the second AD sampling module is used for acquiring an analog signal of the voltage at the side of the electric energy meter, performing analog-to-digital conversion and outputting a second digital signal;
the second main control module is used for processing the output second digital signal after the analog-digital conversion;
the second storage module is used for storing data obtained after the second main control module processes the second digital signal;
the second power supply module is used for providing power for each electric element of the host;
the second wireless communication module is used for communicating with the extension set and receiving the processed first digital signal output by the first wireless communication module;
second AD sampling module, second storage module, second power module and second wireless communication module all connect second host system, second power module still connects second AD sampling module, second storage module and second wireless communication module.
2. The wireless secondary voltage drop field tester according to claim 1, wherein the first AD sampling module and the second AD sampling module both adopt AD sampling chips with model number AD 7606.
3. The wireless secondary voltage drop field tester according to claim 2, wherein the first main control module and the second main control module both use a DSP chip of ADSP-21479 type.
4. The wireless secondary pressure drop field tester according to claim 3, wherein the first storage module and the second storage module each include an EEprom unit and an SD card, the EEprom unit is an AT24C256 chip, and the EEprom unit and the SD card are both connected to the DSP chip.
5. The wireless secondary pressure drop field tester of claim 4, wherein the first wireless communication module and the second wireless communication module each comprise an RS485 communication unit, a Bluetooth communication unit, and a GPS communication unit.
6. The wireless secondary pressure drop field tester of claim 5, further comprising a display module, wherein the display module is connected to the first main control module and the second main control module.
7. The wireless secondary voltage drop field tester according to claim 6, wherein the display module is a tablet or palm computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020746747.2U CN212781195U (en) | 2020-05-07 | 2020-05-07 | Wireless secondary voltage drop on-site tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020746747.2U CN212781195U (en) | 2020-05-07 | 2020-05-07 | Wireless secondary voltage drop on-site tester |
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| Publication Number | Publication Date |
|---|---|
| CN212781195U true CN212781195U (en) | 2021-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020746747.2U Active CN212781195U (en) | 2020-05-07 | 2020-05-07 | Wireless secondary voltage drop on-site tester |
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| CN (1) | CN212781195U (en) |
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- 2020-05-07 CN CN202020746747.2U patent/CN212781195U/en active Active
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