CN215297646U - Single-well electric energy meter field calibration device - Google Patents
Single-well electric energy meter field calibration device Download PDFInfo
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- CN215297646U CN215297646U CN202120137226.1U CN202120137226U CN215297646U CN 215297646 U CN215297646 U CN 215297646U CN 202120137226 U CN202120137226 U CN 202120137226U CN 215297646 U CN215297646 U CN 215297646U
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Abstract
The utility model provides a single well electric energy meter field calibration device belongs to electric energy meter calibration technical field. The technical scheme is as follows: a single-well electric energy meter on-site calibration device comprises an acquisition unit, a data processing unit and an upper computer; the acquisition unit is used for acquiring electric energy parameters such as voltage and current in a three-phase power supply line, transmitting the electric energy parameters to the data processing unit for metering, and uploading the electric energy parameters serving as standard electric energy parameters to an upper computer; the upper computer is also connected with a field RTU, the electric energy meter electric parameters in the field electric energy meter are read through the field RTU, the standard electric power parameters and the electric energy meter electric parameters are compared and calculated by the upper computer, calibration is completed, and data can be displayed and output. The utility model has the advantages that: the utility model can realize the online detection of the ammeter without disassembling and stopping the well and affecting the production; the data of the on-site electric energy meter is acquired in real time by acquiring the on-site RTU data, and the on-site electric energy meter is simple in wiring, stable and reliable.
Description
Technical Field
The utility model relates to an electric energy meter calibration technical field especially relates to a single well electric energy meter field calibration device.
Background
At present, in the operation of an oil well in an oil field, the actual working condition and the operation state of the oil well are judged according to the collected electric parameters by collecting the electric parameters in an electric energy meter of the oil well. The existing means is to directly collect data on an ammeter by using a field calibrator, but due to the reasons of more field oil wells, complex working conditions, incapability of stopping the well and the like, the construction difficulty of field personnel is high, and the error report of ammeter collection is easily caused; and because there is frequency converter equipment on the spot, the load of electric power is not invariable, through the actual operation, find some field check meter equipment that use at present under the nonlinear load condition, the error exceeds 10%, when being equipped with the frequency converter on the spot, often can take place can't gather the pulse signal, very unstable, can't satisfy the demand that present field calibration detected.
SUMMERY OF THE UTILITY MODEL
In view of the problems in the prior art, the utility model aims to provide a single-well electric energy meter field calibration device, which can realize on-line electric energy meter detection without disassembling and stopping the well and influencing production; the anti-interference ability is strong, and the wiring is simple, reduces the potential safety hazard, and convenient and fast can be stable accurate completion electric power parameter measurement.
The utility model discloses a realize through following technical scheme: a single-well electric energy meter on-site calibration device comprises an acquisition unit, a data processing unit and an upper computer;
the acquisition unit comprises a voltage acquisition module and a current acquisition module; the data processing unit comprises a power supply module, a processor module, a storage module, a clock module, a communication module and an electric energy metering module; the voltage acquisition module and the current acquisition module are both connected with the electric energy metering module; the data processing unit is connected with the upper computer through a communication module;
the power supply module, the communication module and the electric energy metering module are all connected with the processor module;
the upper computer is connected with an on-site RTU, and the on-site RTU is connected with an on-site electric energy meter for monitoring electric energy of the three-phase distribution line.
The power supply module is used for supplying power to the processor module, the communication module and the electric energy metering module; the current acquisition module and the voltage acquisition module are used for acquiring current signals and voltage signals in an on-site three-phase distribution line and converting the current signals and the voltage signals into analog signals which can be sampled by the electric energy metering module, the electric energy metering module carries out AD conversion and metering on the acquired analog signals to serve as standard electric power parameters and transmits the standard electric power parameters to the processor module through the SPI, and the processor module transmits the standard electric power parameters to the upper computer through the communication module; the field RTU is communicated with the field electric energy meter, so that the electric parameters of the field electric energy meter can be acquired in real time; the on-site RTU is in communication connection with the upper computer and uploads the electric parameters of the electric energy meter to the upper computer; and the upper computer performs data processing on the standard electric power parameters and the electric energy meter electric power parameters, displays the processed data, and calibrates the field electric energy meter according to the displayed data. Compared with a pulse calibration mode, the whole process mainly adopts digital communication, has strong anti-interference capability, can better adapt to complex working conditions and electromagnetic environments, and ensures the consistency and reliability of data.
Further, the processor module adopts an STM32F103 enhanced single chip microcomputer. And (5) packaging by using LQFP 100.
Further, the electric energy metering module is a chip RN 8302. The electric energy metering module completes metering of the received analog signals through processes of AD conversion, a multiplier, voltage-frequency conversion and the like, and transmits metering results to the processor module.
In order to complete on-site current sampling safely and quickly, the current acquisition module comprises three pincer-shaped current transformers and a current-voltage conversion circuit connected between the pincer-shaped current transformers and the electric energy metering module in series. The three pincerlike current transformers respectively convert the collected line current in the three-phase distribution line into mA-level current signals, convert the mA-level current signals into analog voltage signals through a resistor R and input the analog voltage signals into a current sampling channel of the electric energy metering module.
In order to complete the on-site voltage sampling safely and quickly, the voltage acquisition module comprises three pairs of voltage clamps, and the voltage clamps are connected with the electric energy metering module through voltage division circuits. The voltage division circuit reduces the high voltage of the distribution line to an analog voltage signal which can be allowed by a voltage sampling channel of the electric energy metering module, and the peak-to-peak value of the analog voltage signal is not higher than 800 mVp.
Further, the voltage dividing circuit comprises a resistor R0, one end of the resistor R0 is connected with a voltage clamp, and the other end of the resistor R0 is simultaneously connected with a resistor R1 and a positive analog input pin of any voltage sampling channel of the electric energy acquisition module; the other end of the resistor R1 is connected with a resistor R2, and the other end of the resistor R2 is simultaneously connected with another voltage clamp and a negative analog input pin of a corresponding voltage sampling channel; the common end of the resistor R1 and the resistor R2 is grounded; the capacitor C1 is connected in parallel with two ends of the resistor R1, and the capacitor C2 is connected in parallel with two ends of the resistor R2. The resistor R0 is usually much larger than the resistor R1 and the resistor R2, so as to ensure that the analog voltage signal inputted to the voltage sampling channel after voltage division does not exceed 800 mVp.
Further, the resistance value of the resistor R0 is 1M ohm, and the resistance values of the resistor R1 and the resistor R2 are 1K ohm, so that the line voltage 220V can be reduced to 220 mV; the capacitor C1 and the capacitor C2 are filter capacitors, and the capacitance is set to 33 nF.
In order to facilitate connection and use, the upper computer is a portable computer with at least 2 USB interfaces; any one USB interface is connected with the communication module; and the other USB interface is connected with the serial port of the on-site RTU through a USB-to-serial port module. The upper computer runs with a data processing module, the data processing module can compare and calculate the standard electric energy participation with the electric parameter of the electric energy meter and finally display the result on a display of the upper computer, and the data output module is further arranged and can output data so as to facilitate recording and tracing.
The portable data acquisition and processing device further comprises a suitcase, and the acquisition unit and the data processing unit are mounted in the suitcase.
The utility model has the advantages that: the utility model discloses can be not dismantling and shut down the well, can realize the on-line measuring of ammeter under the condition that does not influence production, reduce the power failure because of the ammeter examination causes to and the adverse effect brought for production. The data of the on-site electric energy meter is acquired in real time by acquiring the on-site RTU data, so that the wiring is simple, stable and reliable, and the use risk is reduced; the online detection can save a large amount of manual observation time and improve the working efficiency.
Drawings
Fig. 1 is an overall block diagram of the present invention.
FIG. 2 is a circuit diagram of a processor module.
Fig. 3 is a circuit diagram of the electric energy metering module.
Fig. 4 is a circuit diagram of a clock unit.
Fig. 5 is a circuit diagram of a memory cell.
Fig. 6 is a voltage divider circuit diagram.
Fig. 7 is a display interface of the upper computer.
Fig. 8 is a data export example.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
The first embodiment is shown in fig. 1-5, and the utility model is realized by the following technical scheme: a single-well electric energy meter on-site calibration device comprises an acquisition unit, a data processing unit and an upper computer;
the acquisition unit comprises a voltage acquisition module and a current acquisition module; the data processing unit comprises a power supply module, a processor module, a storage module, a clock module, a communication module and an electric energy metering module; the voltage acquisition module and the current acquisition module are both connected with the electric energy metering module; the data processing unit is connected with the upper computer through a communication module;
the power supply module, the communication module and the electric energy metering module are all connected with the processor module;
the upper computer is connected with the RTU, and the field RTU is connected with a field electric energy meter for monitoring electric energy of the three-phase distribution line.
The power supply module is used for supplying power to the processor module, the communication module and the electric energy metering module; the current acquisition module and the voltage acquisition module are used for acquiring current signals and voltage signals in an on-site three-phase distribution line and converting the current signals and the voltage signals into analog signals which can be sampled by the electric energy metering module, the electric energy metering module carries out AD conversion and metering on the acquired analog signals to serve as standard electric power parameters and transmits the standard electric power parameters to the processor module through the SPI, and the processor module transmits the standard electric power parameters to the upper computer through the communication module; the field RTU is communicated with the field electric energy meter, so that the electric parameters of the field electric energy meter can be acquired in real time; the on-site RTU is in communication connection with the upper computer and uploads the electric parameters of the electric energy meter to the upper computer; and the upper computer performs data processing on the standard electric power parameters and the electric energy meter electric power parameters, displays the processed data, and calibrates the field electric energy meter according to the displayed data.
The processor module adopts an STM32F103 enhanced single chip microcomputer. With the use of the LQFP100 package,
the electric energy metering module is a chip RN 8302. The electric energy metering module completes metering of the received analog signals through processes of AD conversion, a multiplier, voltage-frequency conversion and the like, and transmits metering results to the processor module.
In a second embodiment, referring to fig. 6, on the basis of the first embodiment, in order to complete on-site current sampling safely and quickly, the current collecting module includes a three-way split core current transformer and a current-voltage converting circuit connected in series between the split core current transformer and the electric energy metering module. The three pincerlike current transformers respectively convert the collected line current in the three-phase distribution line into mA-level current signals, convert the mA-level current signals into analog voltage signals through a resistor R and input the analog voltage signals into a current sampling channel of the electric energy metering module.
For safe and quick completion of on-site voltage sampling, the voltage acquisition module comprises three pairs of voltage clamps, and the voltage clamps are connected with the electric energy metering module through a voltage division circuit. The voltage division circuit reduces the high voltage of the distribution line to an analog voltage signal which can be allowed by a voltage sampling channel of the electric energy metering module, and the peak-to-peak value of the analog voltage signal is not higher than 800 mVp.
The voltage dividing circuit comprises a resistor R0, one end of the resistor R0 is connected with a voltage clamp, and the other end of the resistor R0 is simultaneously connected with a resistor R1 and a positive analog input pin of any voltage sampling channel of the electric energy acquisition module; the other end of the resistor R1 is connected with a resistor R2, and the other end of the resistor R2 is simultaneously connected with another voltage clamp and a negative analog input pin of a corresponding voltage sampling channel; the common end of the resistor R1 and the resistor R2 is grounded; the capacitor C1 is connected in parallel with two ends of the resistor R1, and the capacitor C2 is connected in parallel with two ends of the resistor R2. The resistor R0 is usually much larger than the resistor R1 and the resistor R2, so as to ensure that the analog voltage signal inputted to the voltage sampling channel after voltage division does not exceed 800 mVp.
The resistance value of the resistor R0 is 1M ohm, the resistance values of the resistor R1 and the resistor R2 are 1K ohm, and the line voltage 220V can be reduced to 220 mV; the capacitor C1 and the capacitor C2 are filter capacitors, and the capacitance is set to 33 nF.
In a third embodiment, referring to fig. 7 to 8, on the basis of the second embodiment, in order to facilitate connection, the upper computer is a portable computer with at least 2 USB interfaces;
considering that the upper computer is a portable computer, a USB port is usually used as a communication port, and the upper computer further comprises a USB-to-serial port communication module which is used for connecting the USB port with a serial port of a field RTU. Any one USB interface is connected with the communication module; and the other USB interface is connected with the serial port of the on-site RTU through a USB-to-serial port module. The upper computer runs with a data processing module, the data processing module can compare and calculate the standard electric energy participation with the electric parameter of the electric energy meter and finally display the result on a display of the upper computer, and the data output module is further arranged and can output data so as to facilitate recording and tracing.
In order to be more portable and simultaneously protect the safety of devices and operators, the portable medical device also comprises a suitcase, and the acquisition unit and the data processing unit are arranged in the suitcase. The suitcase should be of insulating material.
The utility model discloses during the use, this project is at first with pincerlike current transformer and voltage clamp connection in the switch board circuit, with on-the-spot RTU and communication module respectively with the USB mouth communication connection of host computer, after finishing connecting, open the data processing module of host computer, the host computer is synchronous receives the standard electric power parameter of transmission from the data processing unit and the on-the-spot electric power parameter of transmission from on-the-spot RTU simultaneously, after the data processing module of host computer operation carries out data processing, accomplish the instantaneous value of standard ammeter and the instantaneous value and the positive active electric energy value of on-the-spot ammeter, reverse active electric energy value; after a period of time, calculating the average value, the maximum value and the minimum value of the standard power parameters, displaying the processed data, finishing the recording and processing work of the metering data, finally exporting the data through a data export module according to the requirement so as to record and trace, and finally sorting and picking up related instruments and meters to finish the whole metering work.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, unless otherwise specified, "a plurality" means two or more.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical features that the utility model has not been described can be realized through or adopt prior art, and no longer give unnecessary details here, and of course, the above-mentioned explanation is not right the utility model discloses a restriction, the utility model discloses also not only be limited to the above-mentioned example, ordinary skilled person in this technical field is in the utility model discloses a change, modification, interpolation or replacement made in the essential scope also should belong to the utility model discloses a protection scope.
Claims (6)
1. The single-well electric energy meter on-site calibration device is characterized by comprising an acquisition unit, a data processing unit and an upper computer;
the acquisition unit comprises a voltage acquisition module and a current acquisition module; the data processing unit comprises a power supply module, a processor module, a communication module and an electric energy metering module; the voltage acquisition module and the current acquisition module are both connected with the electric energy metering module; the data processing unit is connected with the upper computer through a communication module;
the power supply module, the communication module and the electric energy metering module are all connected with the processor module;
the upper computer is connected with an on-site RTU, and the on-site RTU is connected with an on-site electric energy meter for monitoring electric energy of the three-phase distribution line;
the CPU adopts an STM32F103 enhanced single chip microcomputer;
the electric energy metering module is a chip RN 8302.
2. The single well electric energy meter field calibration device of claim 1, wherein the single well electric energy meter field calibration device is characterized in that
The current acquisition module comprises three pincer-shaped current transformers and a current-voltage conversion circuit connected in series between the pincer-shaped current transformers and the electric energy metering module.
3. The single-well electric energy meter field calibration device of claim 1, wherein the voltage acquisition module comprises three pairs of voltage clamps, and the voltage clamps are connected with the electric energy metering module through a voltage division circuit.
4. The single-well electric energy meter field calibration device according to claim 3, wherein the voltage dividing circuit comprises a resistor R0, one end of the resistor R0 is connected with a voltage clamp, and the other end of the resistor R0 is simultaneously connected with a positive analog input pin of any voltage sampling channel of the resistor R1 and the electric energy acquisition module; the other end of the resistor R1 is connected with a resistor R2, and the other end of the resistor R2 is simultaneously connected with another voltage clamp and a negative analog input pin of a corresponding voltage sampling channel; the common end of the resistor R1 and the resistor R2 is grounded; the capacitor C1 is connected in parallel with two ends of the resistor R1, and the capacitor C2 is connected in parallel with two ends of the resistor R2.
5. The single-well electric energy meter field calibration device as claimed in claim 4, wherein the resistance value of the resistor R0 is 1M ohm, and the resistance values of the resistor R1 and the resistor R2 are 1K ohm, so that the line voltage 220V can be reduced to 220 mV; the capacitor C1 and the capacitor C2 are filter capacitors, and the capacitance is set to 33 nF.
6. The single-well electric energy meter field calibration device according to claim 1, wherein the upper computer is a portable computer with at least 2 USB interfaces; any one USB interface is connected with the communication module; and the other USB interface is connected with the serial port of the on-site RTU through a USB-to-serial port module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120137226.1U CN215297646U (en) | 2021-01-19 | 2021-01-19 | Single-well electric energy meter field calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120137226.1U CN215297646U (en) | 2021-01-19 | 2021-01-19 | Single-well electric energy meter field calibration device |
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| Publication Number | Publication Date |
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| CN215297646U true CN215297646U (en) | 2021-12-24 |
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| CN202120137226.1U Active CN215297646U (en) | 2021-01-19 | 2021-01-19 | Single-well electric energy meter field calibration device |
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- 2021-01-19 CN CN202120137226.1U patent/CN215297646U/en active Active
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