CN212540527U

CN212540527U - Electric energy metering system

Info

Publication number: CN212540527U
Application number: CN202020944861.6U
Authority: CN
Inventors: 郑建华; 郑义; 郑卫东; 靳敏江; 李军立; 罗瑞; 姜晨; 杨禛; 曾庆磊; 曾繁湫
Original assignee: Nanyang Power Supply Co of State Grid Henan Electric Power Co Ltd
Current assignee: Nanyang Power Supply Co of State Grid Henan Electric Power Co Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-02-12
Anticipated expiration: 2030-05-29

Abstract

An electric energy metering system belongs to the field of electric energy metering. The electric energy meter comprises at least two electric energy meters, wherein each electric energy meter comprises a controller, an electric energy metering module and a communication module which are arranged in a shell of the electric energy meter, and the controller is respectively and correspondingly electrically connected with the electric energy metering module and the communication module so that all the electric energy meters have functions of metering the electric energy meters and checking the electric energy meters; the calibration function pin configured to measure the electric energy meter is coupled with the counting function pin configured to calibrate the electric energy meter, or the communication module configured to measure the electric energy meter is in communication connection with the communication module configured to calibrate the electric energy meter, so as to transmit electric energy measurement calibration data obtained by measuring the electric energy meter to the controller for calibrating the electric energy meter. When at least two electric energy meters are matched, compared with the metering electric energy meters, one or more other electric energy meters are the checking electric energy meters of the metering electric energy meters, so that the metering function of the metering electric energy meters is not influenced, the idle calculation force is endowed with the checking function, and the configuration of the collector can be saved.

Description

Electric energy metering system

Technical Field

The utility model relates to an electric energy measurement technical field, concretely relates to electric energy measurement system.

Background

When the electronic electric energy is measured, the check pulse is used to push the step counter gear to record the electric quantity. In practice, however, the pulse counting and metering electricity consumption is accurate, and the electricity consumption displayed by the gear of the counter may have errors. For this reason, it is necessary to check the power consumption measured by the electric energy meter and to recover accurate data in time. Of course, the collector is generally used to obtain the power consumption of the branch electric energy meter, count and check the pulse to check the data of the branch electric energy meter, and recover the accurate data in time. However, the collector needs to be configured, and the electric energy meter is located at a longer distance from the collector, for which a communication cable needs to be configured, or a power line carrier technology is used to transmit related data signals.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an electric energy metering system to solve the technical problem that current electric energy meter measurement check-up needs to be realized through the collector.

In order to solve the technical problems, the following technical scheme can be selected according to the needs:

an electric energy metering system comprises at least two electric energy meters, wherein each electric energy meter comprises a controller, an electric energy metering module and a communication module which are arranged in a casing of the electric energy meter, and the controllers are respectively and correspondingly electrically connected with the electric energy metering modules and the communication modules, so that all the electric energy meters have functions of metering the electric energy meters and checking the electric energy meters; the calibration function pin configured to the metering electric energy meter is coupled with the counting function pin configured to the calibration electric energy meter, or the communication module configured to the metering electric energy meter is in communication connection with the communication module configured to the calibration electric energy meter, so as to transmit electric energy metering calibration data obtained by the metering electric energy meter to the controller of the calibration electric energy meter.

Preferably, the electric energy metering module comprises an electric energy metering chip with a built-in controller.

Further, the electric energy metering chip is an ADE7169 type electric energy metering chip.

Preferably, the communication module includes a CAN module.

Furthermore, the CAN module comprises a CAN control chip and a CAN level chip, and the CAN control chip selects the CAN control chip with the SPI bus communication function.

Still further, the CAN control chip selects an MCP2510 type CAN controller, and the CAN level chip selects a TJA1050 type CAN level chip.

Preferably, the system further comprises a storage module, and the storage module selects a storage module with an SPI bus communication function.

Further, the memory module selects a W25Q64CV type memory chip.

Compared with the prior art, the beneficial effects of the utility model are that:

1. when at least two electric energy meters are matched, compared with the metering electric energy meters, one or more other electric energy meters are the checking electric energy meters of the metering electric energy meters, so that the metering function of the metering electric energy meters is not influenced, the idle calculation force is endowed with the checking function, and the configuration of the collector can be saved. Generally, 2, 4, 6 and other more electric energy meters are configured in one electric meter box, and the environment that only one electric energy meter is configured is less, so that a large number of collectors can be saved.

2. The electric energy metering chip with the built-in controller saves the area of the PCB, reduces the wiring difficulty of the PCB and can also reduce the generation of heat.

And 3, the CAN bus has good stability and a multi-master control function. Compared with the SPI bus, each SPI communication module is not required to be provided with a chip selection line.

4. The ADE7169 type electric energy metering chip is provided with an SPI function pin, and the adaptability of the ADE7169 type electric energy metering chip to a CAN control chip with an SPI bus communication function is high.

5. The ADE7169 type electric energy metering chip is provided with an SPI function pin, and the adaptability of the ADE7169 type electric energy metering chip to a storage module with an SPI bus communication function is high.

Drawings

Fig. 1 is a peripheral circuit diagram of an ADE7169 type electric energy metering chip of the electric energy metering system of the present invention.

Fig. 2 is a circuit diagram of the electric energy metering system of the present invention.

Fig. 3 is a peripheral circuit diagram of the communication module and the storage module of the electric energy metering system of the present invention.

Detailed Description

The present invention is described below in terms of embodiments with reference to the accompanying drawings to assist those skilled in the art in understanding and realizing the invention. Unless otherwise indicated, the following embodiments and technical terms therein should not be understood to depart from the background of the technical knowledge in the technical field.

Example 1: an electric energy metering system comprises at least two electric energy meters.

Referring to fig. 1-3, each electric energy meter includes a controller, an electric energy metering module and a communication module, which are fixedly disposed in a housing (not shown) of the electric energy meter, and the controller is electrically connected to the electric energy metering module and the communication module, respectively, so that all the electric energy meters have functions of metering the electric energy meters and checking the electric energy meters. When the electric energy meter is used, the electric energy meters are configured to be a metering electric energy meter and a checking electric energy meter. It should be understood that any one of the electric energy meters can be used as a metering electric energy meter, and when one electric energy meter can be used as a metering electric energy meter, the other electric energy meter or meters can also be used as a checking electric energy meter, but at the same time, the checking electric energy meter can still be used as a metering electric energy meter, and compared with the metering electric energy meter formed by the checking electric energy meter, the other metering electric energy meters can also be used as a checking electric energy meter.

Fig. 1 shows an electric energy metering chip with a built-in controller, which is an ADE7169 electric energy metering chip, and the pin 42 and the pin 43 of the electric energy metering chip are both checking function pins, and the pin 45 of the electric energy metering chip is a counting function pin, and the electric energy metering chip is used as an electric energy metering module and a controller. Fig. 2 shows a metering circuit diagram in which a current transformer TA for an instrument and a voltage transformer TV for an instrument are selected to have appropriate specifications as needed. The input end voltage of the PN8015 type chip can be 85V-265V alternating current, and the output end voltage VCC is 5V direct current. If necessary, the LM1117-5.0 type voltage stabilizing chip can be used for outputting 5V direct current. The output end voltage AVDD of the LM1117-3.3 type voltage stabilizing chip is 3.3V direct current.

Fig. 3 shows a CAN bus type communication module, which includes a CAN control chip U85 and a CAN level chip, and the CAN control chip selects a CAN control chip having an SPI bus communication function. The CAN control chip is preferably an MCP2510 type CAN controller, and the CAN level chip is preferably a TJA1050 type CAN level chip. In fig. 3, the ADUM5403 digital isolator is used to adjust the 3.3V high level of the ADE7169 electric energy metering chip to 5.0V high level to meet the level requirement of the CAN module.

Taking fig. 1 corresponding to the electric energy meter as an example, the electric energy metering chip with the built-in controller of the electric energy meter is chip U91, and the electric energy metering chip with the built-in controller of the verification electric energy meter is chip U92 (not shown). The checking function pin 43 of the chip U91 is coupled to the counting function pin 45 of the chip U92, and the coupling method includes an electrical connection method, a photoelectric coupling method, and the like.

Or the communication module of the metering electric energy meter is in communication connection with the communication module of the verification electric energy meter so as to transmit electric energy metering verification data obtained by the metering electric energy meter to the controller of the verification electric energy meter. In fig. 3, the CAN module has a multi-master control function, and CAN transmit the electric energy metering verification data obtained by the metering electric energy meter to the controller function of the verification electric energy meter, and also CAN feed back the electric energy metering verification data obtained by the verification of the verification electric energy meter to the metering electric energy meter.

Referring to fig. 3, each electric energy meter further includes a memory module U84, and the memory module U84 selects a memory module with SPI bus communication function, such as a W25Q64CV memory chip.

When the electric energy meter is used, the checking electric energy meter corresponding to the metering electric energy meter can still be used as the metering electric energy meter, and at the moment, the original metering electric energy meter can be used as the checking electric energy meter. That is, the chip U92 is used as a power metering chip, the chip U91 is used as a power verification chip, and the verification function pin 43 of the chip U92 is coupled with the count function pin 45 of the chip U91. Similarly, the master-slave control relationship between the CAN module connected to the chip U91 and the CAN module connected to the chip U92 may be switched.

The present invention has been described in detail with reference to the accompanying drawings and examples. It should be understood that in practice the description of all possible embodiments is not exhaustive and that the inventive concepts of the present invention are presented herein by way of illustration as much as possible. Without departing from the inventive concept of the present invention and without paying creative labor, technical personnel in the technical field can make or delete combinations, specific parameters to perform experimental changes to the technical features in the above embodiments, or use the prior art in the technical field to perform the specific embodiments of conventional replacement and formation by the disclosed technical means, which all belong to the content hidden in the present invention.

Claims

1. An electric energy metering system comprises at least two electric energy meters, and is characterized in that the electric energy meters comprise a controller, an electric energy metering module and a communication module which are arranged in a shell of the electric energy meter, wherein the controller is respectively and correspondingly electrically connected with the electric energy metering module and the communication module, so that all the electric energy meters have functions of metering the electric energy meters and checking the electric energy meters; the calibration function pin configured to the metering electric energy meter is coupled with the counting function pin configured to the calibration electric energy meter, or the communication module configured to the metering electric energy meter is in communication connection with the communication module configured to the calibration electric energy meter, so as to transmit electric energy metering calibration data obtained by the metering electric energy meter to the controller of the calibration electric energy meter.

2. The power metering system of claim 1, wherein the power metering module includes a power metering chip having a controller built therein.

3. The power metering system of claim 2, wherein the power metering chip is selected from an ADE7169 power metering chip.

4. The electrical energy metering system of claim 1, wherein the communication module comprises a CAN module.

5. The electric energy metering system of claim 4, wherein the CAN module comprises a CAN control chip and a CAN level chip, the CAN control chip selects a CAN control chip with SPI bus communication functionality.

6. The electric energy metering system of claim 5 wherein the CAN control chip selects a MCP2510 type CAN controller and the CAN level chip selects a TJA1050 type CAN level chip.

7. The electric energy metering system of claim 1, further comprising a storage module, the storage module selecting a storage module with SPI bus communication functionality.

8. The electrical energy metering system of claim 7, wherein the memory module selects a W25Q64CV type memory chip.