Electric energy metering device, electric meter equipment and configuration method

Abstract

The present invention provides an electric energy metering device, an electric meter device, and a configuration method for the electric energy metering device, which relate to the field of electric power technology, wherein the electric energy metering device comprises: a first mutual inductor unit, used to obtain a first detection signal corresponding to a transmission line; a mutual inductor acquisition module, used to obtain a second detection signal corresponding to the transmission line; a metering module, used to obtain a first turns ratio of the first mutual inductor unit according to the first detection signal, the second detection signal, and the second turns ratio corresponding to the mutual inductor acquisition module, and perform configuration processing based on the first turns ratio. The device, the electric meter device, and the configuration method of the present invention can automatically configure the turns ratio of the mutual inductor unit configured by the electric energy metering device, avoid large deviations in electric energy metering due to operational configuration errors when configuring the turns ratio of the mutual inductor unit, ensure the accuracy of electric energy metering, and save costs and resources.

Description

Technical Field

[0001] The present invention relates to the field of electric power technology, and in particular to an electric energy metering device, an electric meter equipment, and a configuration method for the electric energy metering device. Background Art

[0002] In recent years, with the planning of energy Internet construction, electric energy metering devices have developed rapidly. Electric energy metering devices of different specifications have different rated currents, but in actual applications, the current to be measured is often much larger than the rated current of the electric energy metering device. Therefore, general electric energy metering devices need to be equipped with external transformers of corresponding proportions for matching use. Transformers, also known as instrument transformers, can be current transformers and voltage transformers, etc., which can convert high voltage into low voltage and large current into small current. Usually, the selection of transformers needs to be determined based on the actual measured load and the rated current of the electric energy metering device. For different application scenarios and different load devices, the turns ratio of the selected transformers is different. Therefore, for meter equipment with multiple electric energy metering devices, when installing the electric energy metering device on site, the electric energy metering device needs to be configured according to the turns ratio of the external transformer used on site. If the configuration is wrong, it will cause a large deviation in the electric energy metering, causing losses to users or power suppliers. Summary of the invention

[0003] In view of this, a technical problem to be solved by the present invention is to provide an electric energy metering device, an electric meter equipment and a configuration method for the electric energy metering device, which can automatically configure the turns ratio of the mutual inductor unit.

[0004] According to one aspect of the present invention, there is provided an electric energy metering device, comprising: a first transformer unit, used to obtain a first detection signal corresponding to a transmission line; a transformer acquisition module, used to obtain a second detection signal corresponding to the transmission line; a metering module, used to obtain a first turns ratio of the first transformer unit according to the first detection signal, the second detection signal and a second turns ratio corresponding to the transformer acquisition module, and perform configuration processing based on the first turns ratio.

[0005] Optionally, the transformer acquisition module includes: a second transformer unit, used to obtain the second detection signal; wherein the turns ratio of the second transformer unit is the second turns ratio.

[0006] Optionally, the transformer acquisition module includes: a signal processing unit connected to the second transformer unit, and configured to receive the second detection signal and obtain detection value information of the second detection signal.

[0007] Optionally, the metering module includes: a communication unit, which establishes a communication connection with the signal processing unit, and is used to receive detection value information of the second detection signal sent by the signal processing unit through the communication connection.

[0008] Optionally, the communication unit receives the second turns ratio sent by the signal processing unit through the communication connection.

[0009] Optionally, the signal processing unit and the communication unit establish the communication connection using a handshake protocol; wherein, after the communication connection is successfully established, the signal processing unit sends the detection value information of the second detection signal to the communication unit through the communication connection.

[0010] Optionally, the signal processing unit sends a handshake frame, and if a response frame is received from the communication unit, the communication connection is successfully established; or, the communication unit sends a handshake frame, and if a response frame is received from the signal processing unit, the communication connection is successfully established.

[0011] Optionally, the communication unit is further configured to interrupt the communication connection after determining that the configuration processing based on the first turns ratio is completed.

[0012] Optionally, the metering module includes: a storage unit; and a configuration unit, respectively connected to the first mutual inductor unit, the communication unit and the storage unit, for calculating the first turns ratio based on the detection value of the first detection signal, the second turns ratio and the detection value of the second detection signal, and storing the first turns ratio in the storage unit.

[0013] Optionally, the configuration unit is used to determine the first turns ratio Among them, B is the detection value of the second detection signal, C2 is the second turns ratio, and A is the detection value of the first detection signal.

[0014] Optionally, the metering module includes: a first display unit, connected to the communication unit and the configuration unit, respectively, for displaying the status of the communication connection and / or the execution status of the configuration unit; the transformer acquisition module includes: a second display unit, connected to the signal processing unit, for displaying the status of the communication connection.

[0015] Optionally, the communication unit includes: a first communication interface; the signal processing unit includes: a second communication interface; wherein the communication connection is established through the first communication interface and the second communication interface; the first communication interface and the second communication interface both include at least one of a bus interface, a wireless interface, and an industrial Ethernet interface.

[0016] Optionally, the first transformer unit includes: a closed-end transformer; and the second transformer unit includes: a clamp-end transformer.

[0017] Optionally, the first detection signal and the second detection signal are both current signals or voltage signals.

[0018] According to another aspect of the present invention, there is provided an electric meter device, comprising: the electric energy metering device as described above.

[0019] According to another aspect of the present invention, there is provided a configuration method for an electric energy metering device, comprising: obtaining a first detection signal corresponding to a transmission line through a first transformer unit; obtaining a second detection signal corresponding to the transmission line through a transformer acquisition module; a metering module obtaining a first turns ratio of the first transformer unit according to the first detection signal, the second detection signal and a second turns ratio corresponding to the transformer acquisition module, and performing configuration processing based on the first turns ratio.

[0020] Optionally, obtaining the second detection signal corresponding to the transmission line through the transformer acquisition module includes: obtaining the second detection signal through the second transformer unit of the transformer acquisition module; wherein the turns ratio of the second transformer unit is the second turns ratio; receiving the second detection signal through the signal processing unit of the transformer acquisition module and obtaining the detection value information of the second detection signal.

[0021] Optionally, the communication unit of the metering module establishes a communication connection with the signal processing unit; the communication unit receives the detection value information of the second detection signal sent by the signal processing unit through the communication connection.

[0022] Optionally, the communication unit receives the second turns ratio sent by the signal processing unit through the communication connection.

[0023] Optionally, the signal processing unit and the communication unit establish the communication connection using a handshake protocol; after the communication connection is successfully established, the signal processing unit sends the detection value information of the second detection signal to the communication unit through the communication connection.

[0024] Optionally, the signal processing unit and the communication unit use a handshake protocol to establish the communication connection, including: the signal processing unit sends a handshake frame, and if a response frame returned by the communication unit is received, the communication connection is successfully established; or, the communication unit sends a handshake frame, and if a response frame returned by the signal processing unit is received, the communication connection is successfully established.

[0025] Optionally, after receiving the first turns ratio and determining that the configuration process based on the first turns ratio is completed, the communication unit interrupts the communication connection.

[0026] Optionally, the configuration unit of the metering module calculates the first turns ratio based on the detection value of the first detection signal, the second turns ratio and the detection value of the second detection signal, and stores the first turns ratio in a storage unit of the metering module.

[0027] Optionally, the configuration unit determines the first turns ratio Among them, B is the detection value of the second detection signal, C2 is the second turns ratio, and A is the detection value of the first detection signal.

[0028] Optionally, the state of the communication connection and / or the execution state of the configuration unit is displayed by a first display unit of the metering module; and the state of the communication connection is displayed by a second display unit of the transformer acquisition module.

[0029] Optionally, the communication unit includes: a first communication interface; the signal processing unit includes: a second communication interface; and further includes: establishing the communication connection through the first communication interface and the second communication interface; wherein the first communication interface and the second communication interface both include at least one of a bus interface, a wireless interface, and an industrial Ethernet interface.

[0030] The electric energy metering device, electric meter equipment and configuration method for the electric energy metering device of the present invention can automatically configure the turns ratio of the mutual inductor unit configured by the electric energy metering device, simplify the operation of configuring the turns ratio of the mutual inductor unit, avoid large deviations in electric energy metering due to operational configuration errors when configuring the turns ratio of the mutual inductor unit, ensure that the turns ratio of the mutual inductor unit configured by the electric energy metering device is correctly configured, thereby ensuring the accuracy of electric energy metering and saving costs and resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0032] Figure 1 A schematic diagram of a module of an embodiment of an electric energy metering device according to the present invention;

[0033] Figure 2A schematic diagram of a module of another embodiment of an electric energy metering device according to the present invention;

[0034] Figure 3 is an application schematic diagram of another embodiment of the electric energy metering device according to the present invention;

[0035] Figure 4 A schematic diagram of a metering module in an embodiment of an electric energy metering device according to the present invention;

[0036] Figure 5 A schematic diagram of a transformer acquisition module in an embodiment of an electric energy metering device according to the present invention;

[0037] Figure 6 The figure is a flow chart of an embodiment of a configuration method for an electric energy metering device according to the present invention. DETAILED DESCRIPTION

[0038] The present invention is described more fully below with reference to the accompanying drawings, in which exemplary embodiments of the present invention are described. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The technical solutions of the present invention are described in many aspects below in conjunction with various figures and embodiments.

[0039] The terms "first", "second", etc. in the following text are only used to distinguish between the two and have no other special meanings.

[0040] like Figure 1 As shown, the present invention provides an electric energy metering device, comprising: a metering module 11, a first mutual inductor unit 12 and a mutual inductor acquisition module 21. The first mutual inductor unit 12 is a mutual inductor unit configured by the electric energy metering device for electric energy metering, the first mutual inductor unit 12 obtains a first detection signal corresponding to a power transmission line, and the mutual inductor acquisition module 21 obtains a second detection signal corresponding to the power transmission line, and the power transmission line may be a power line, etc.

[0041] The metering module 11 obtains the first turns ratio of the first transformer unit 12 according to the first detection signal, the second detection signal and the second turns ratio corresponding to the transformer acquisition module 21, and performs configuration processing based on the first turns ratio. The turns ratio is also called the transformer turns ratio, the winding turns ratio, the coil turns ratio, the transformer ratio, etc. The configuration processing may be storing the first turns ratio in the electric energy metering device, etc. The first transformer unit 12 may be a voltage transformer unit or a current transformer unit, etc. When the electric energy metering device performs electric energy metering, the metering module 11 may calculate according to the first detection signal obtained by the first transformer unit 12 and the stored first turns ratio to obtain the actual current or voltage value corresponding to the transmission line.

[0042] In the prior art, if multiple electric energy metering devices are installed in the electric meter equipment, it is necessary to manually verify and configure the first turns ratio of the first mutual inductor unit of each electric energy metering device, which is labor-intensive and prone to errors. The electric energy metering device in the above embodiment can automatically configure the turns ratio of the mutual inductor unit used for metering, which can simplify the operation of configuring the turns ratio of the mutual inductor unit, avoid errors caused by manual operation, ensure the correctness of the turns ratio configuration, and ensure the accuracy of electric energy metering.

[0043] When the current inputted into the metering module 11 by the external load is within the working current range of the metering module 11, it is not necessary to equip the corresponding first transformer unit 12, and the metering module 11 can be directly connected and powered on for use, and it is not necessary to configure the first turns ratio of the first transformer unit 12. When the current inputted into the metering module 11 by the external load is greater than the working current range of the metering module 11, the corresponding first transformer unit 12 is equipped, and the transformer acquisition module 21 can be installed and used on site, and can be connected and used immediately, and the first turns ratio of the first transformer unit 12 can be automatically configured.

[0044] In one embodiment, the mutual inductor acquisition module can be implemented in a variety of ways, and the second detection signal can be directly sent to the metering module 11, or the detection value information of the second detection signal can be sent to the metering module 11 through a communication connection. Figure 2 , 5 As shown, the transformer acquisition module 21 includes a second transformer unit 23, the second transformer unit 23 obtains a second detection signal corresponding to the transmission line 13, and the turns ratio of the second transformer unit 23 is a second turns ratio. The second transformer unit 23 can be a voltage transformer unit or a current transformer unit, etc. The first detection signal and the second detection signal can both be current signals or voltage signals.

[0045] The mutual inductor acquisition module 21 includes a signal processing unit 22, which is connected to the second mutual inductor unit 23. The signal processing unit 22 receives the second detection signal and obtains the detection value information of the second detection signal. The signal processing unit 22 can use a variety of existing circuits to obtain the detection value information of the second detection signal, and the detection value information of the second detection signal can be a current value or a voltage value, etc.

[0046] In one embodiment, Figure 4 As shown, the metering module 11 includes a communication unit 111, the communication unit 111 establishes a communication connection with the signal processing unit 22, and the communication unit 111 receives the detection value information of the second detection signal sent by the signal processing unit 22 through the communication connection. The communication unit 111 can also receive the second turns ratio sent by the signal processing unit 22 through the communication connection.

[0047] The communication unit 111 can communicate with the signal processing unit 22 in a wired or wireless manner. For example, the communication unit 111 includes a first communication interface, the signal processing unit 22 includes a second communication interface, and a communication connection is established through the first communication interface and the second communication interface. The first communication interface and the second communication interface each include at least one of a bus interface, a wireless interface, and an industrial Ethernet interface. The bus interface can be a 485 bus interface, a UART bus interface, a CAN bus interface, etc., and the wireless interface unit can be a Lora interface, a Bluetooth interface, etc.

[0048] In one embodiment, the signal processing unit 22 and the communication unit 111 use a handshake protocol to establish a communication connection, and the communication connection can be a variety of communication connections. After the communication connection is successfully established, the signal processing unit 22 sends the detection value information of the second detection signal to the communication unit 111 through the communication connection. The handshake protocol can be a variety of existing handshake protocols or a custom handshake protocol.

[0049] The signal processing unit 22 sends a handshake frame. If a response frame returned by the communication unit 111 is received, the communication connection is successfully established. Alternatively, the communication unit 111 sends a handshake frame. If a response frame returned by the signal processing unit 22 is received, the communication connection is successfully established. For example, a handshake frame is sent when the signal processing unit 22 is powered on. The information contained in the handshake frame includes a field representing the device type and a string of special characters, etc., which are used to determine the identity. If a response frame returned by the communication unit 111 is received, the communication connection is successfully established. After determining that the configuration processing based on the first turns ratio is completed, the communication unit 11 interrupts the communication connection.

[0050] The metering module 11 includes a storage unit 113 and a configuration unit 112, and the configuration unit 112 is connected to the first mutual inductor unit 12, the communication unit 111 and the storage unit 113 respectively. The configuration unit 112 calculates the first turns ratio based on the detection value of the first detection signal, the second turns ratio and the detection value of the second detection signal, and stores the first turns ratio in the storage unit 113. The configuration unit 113 determines that the first turns ratio = the detection value of the second detection signal * the second turns ratio / the detection value of the first detection signal, that is, the first turns ratio Wherein, B is the detection value of the second detection signal, C2 is the second turns ratio, and A is the detection value of the first detection signal.

[0051] For example, the first turns ratio is set to 1 by default and is stored in the storage unit 113. The first transformer unit 12 obtains a first detection signal corresponding to the power transmission line 13, and the configuration unit 112 receives the first detection signal and obtains a detection value of the first detection signal of 0.25 A. The second transformer unit 23 obtains a second detection signal corresponding to the power transmission line 13, and the signal processing unit 22 obtains a detection value of the second detection signal of 2.5 A, and sends the detection value of the second detection signal to the communication unit 111 through the communication connection, and the communication unit 111 sends the detection value of the second detection signal to the configuration unit 112.

[0052] The second turns ratio of the second mutual inductor unit 23 is 100:1. The second turns ratio can be a fixed value and is pre-stored in the storage unit 113. Alternatively, the second turns ratio is a variable value. The signal processing unit 22 sends the second turns ratio to the communication unit 111 via a communication connection, and the communication unit 111 sends the second turns ratio to the configuration unit 112.

[0053] The configuration unit 112 obtains that the detection value of the second detection signal is 2.5A, the detection value of the first detection signal is 0.25A, and the second turns ratio is 100. The configuration unit 112 determines that the first turns ratio = the detection value of the second detection signal * the second turns ratio / the detection value of the first detection signal = 2.5*100 / 0.25 = 1000. The configuration unit 112 configures the first turns ratio and stores the first turns ratio in the storage unit 113, thereby realizing automatic configuration of the first turns ratio of the external first mutual inductor unit 12.

[0054] The first turns ratio is stored in the storage unit 113, which may be NANDFLASH, NORFLASH, EEPROM, etc. After the first turns ratio is calculated, the calculated first turns ratio is written to the corresponding storage unit address. When the metering module 11 calculates the current, the corresponding first turns ratio is read from the corresponding address to perform the metering calculation.

[0055] The first mutual inductor unit 12 may include a closed-end mutual inductor and related circuit units; the second mutual inductor unit 23 may include a clamp-end mutual inductor and related circuit units. Figure 3 As shown, the first transformer unit 12 includes a closed transformer, and the power transmission line 13 passes through the closed transformer. The closed transformer has two pins, which output the current on the secondary side of the transformer to the metering module 11 for metering.

[0056] The second transformer unit 23 includes a clamp-on transformer and its acquisition circuit. The clamp-on transformer can be conveniently used on site and can be directly clamped on the transmission line 13. The clamp-on transformer, that is, a clamp-type transformer, can be convenient to use when configuring the turns ratio on site. The clamp-on transformer can use a transformer with a determined turns ratio, for example, 100:1. When the communication unit 111 and the signal processing unit 22 are connected for communication, the communication unit 111 or the signal processing unit 22 sends frame data for handshake negotiation. After the negotiation is successful, the configuration unit 112 performs the corresponding turns ratio calculation and configuration processing, etc.

[0057] In one embodiment, Figure 4 As shown, the metering module 11 includes a first display unit 114, which is connected to the communication unit 111 and the configuration unit 112 respectively, and is used to display the state of the communication connection and the execution state of the configuration unit 112, or to display the state of the communication connection or the execution state of the configuration unit 112. Figure 5 As shown, the mutual inductor acquisition module 21 includes a second display unit 24, which is connected to the signal processing unit 22 and is used to display the state of the communication connection.

[0058] The state of the communication connection includes: establishment start state, establishment success state, interruption state, data transmission state, etc. The execution state of the configuration unit 112 includes: turn ratio calculation state, turn ratio storage state, etc. The first display unit 114 and the second display unit 24 can be implemented in a variety of ways. For example, the first display unit 114 and the second display unit 24 can include LED lights, etc., and the state of the communication connection, the execution state of the configuration unit 112, etc. can be indicated by flashing a specified LED light.

[0059] In one embodiment, the present invention provides an electric meter device, comprising: an electric energy metering device as in any of the above embodiments.

[0060] Figure 6 FIG. 1 is a flow chart of an embodiment of a configuration method for an electric energy metering device according to the present invention. Figure 6 As shown:

[0061] Step 601: obtaining a first detection signal corresponding to a power transmission line through a first transformer unit.

[0062] Step 602: Obtain a second detection signal corresponding to the power transmission line through a mutual inductor acquisition module.

[0063] Step 603: The metering module obtains a first turns ratio of the first transformer unit according to the first detection signal, the second detection signal and the second turns ratio corresponding to the transformer acquisition module, and performs configuration processing based on the first turns ratio.

[0064] In one embodiment, there are multiple ways to obtain the second detection signal corresponding to the power transmission line through the transformer acquisition module. For example, the second detection signal is obtained through the second transformer unit of the transformer acquisition module, and the turns ratio of the second transformer unit is the second turns ratio. The second detection signal is received by the signal processing unit of the transformer acquisition module and the detection value information of the second detection signal is obtained.

[0065] The communication unit of the metering module establishes a communication connection with the signal processing unit, and the communication unit receives the detection value information of the second detection signal sent by the signal processing unit through the communication connection. The communication unit receives the second turns ratio information sent by the signal processing unit through the communication connection.

[0066] The signal processing unit and the communication unit use a handshake protocol to establish a communication connection. After the communication connection is successfully established, the signal processing unit sends the detection value information of the second detection signal to the communication unit through the communication connection. For example, the signal processing unit sends a handshake frame. If a response frame returned by the communication unit is received, the communication connection is successfully established. Alternatively, the communication unit sends a handshake frame. If a response frame returned by the signal processing unit is received, the communication connection is successfully established. After determining that the configuration processing based on the first turns ratio is completed, the communication unit interrupts the communication connection.

[0067] The configuration unit of the metering module calculates the first turns ratio based on the detection value of the first detection signal, the second turns ratio and the detection value of the second detection signal, and stores the first turns ratio in the storage unit of the metering module. The configuration unit determines the first turns ratio Wherein, B is the detection value of the second detection signal, C2 is the second turns ratio, and A is the detection value of the first detection signal. The state of the communication connection and the execution state of the configuration unit can be displayed by the first display unit of the metering module, or the state of the communication connection or the execution state of the configuration unit can be displayed by the first display unit of the metering module; the state of the communication connection can be displayed by the second display unit of the mutual inductor acquisition module.

[0068] The electric energy metering device, electric meter equipment and configuration method for the electric energy metering device in the above-mentioned embodiments can automatically configure the turns ratio of the transformer unit configured by the electric energy metering device, which can simplify the operation of configuring the turns ratio of the transformer unit, avoid large deviations in electric energy metering due to operational configuration errors when configuring the turns ratio of the transformer unit, ensure that the turns ratio of the transformer unit configured by the electric energy metering device is correctly configured, thereby ensuring the accuracy of electric energy metering and saving costs and resources.

[0069] The method and system of the present invention may be implemented in many ways. For example, the method and system of the present invention may be implemented by software, hardware, firmware or any combination of software, hardware, firmware. The above order of steps for the method is only for illustration, and the steps of the method of the present invention are not limited to the order specifically described above, unless otherwise specifically stated. In addition, in some embodiments, the present invention may also be implemented as a program recorded in a recording medium, which includes machine-readable instructions for implementing the method according to the present invention. Thus, the present invention also covers a recording medium storing a program for executing the method according to the present invention.

[0070] The description of the present invention is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the invention to the form invented. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for particular uses.

Claims

1. An electric energy metering device, comprising: A first transformer unit, used to obtain a first detection signal corresponding to a power transmission line; A transformer acquisition module, used to obtain a second detection signal corresponding to the power transmission line; Wherein, the mutual inductor acquisition module includes: A second mutual inductor unit, used for obtaining the second detection signal; the turns ratio of the second mutual inductor unit is a second turns ratio; a metering module, configured to obtain a first turns ratio of the first mutual inductor unit according to the first detection signal, the second detection signal and a second turns ratio corresponding to the mutual inductor acquisition module, and perform configuration processing based on the first turns ratio; Wherein, the metering module comprises a storage unit for storing the first turns ratio.

2. The device according to claim 1, wherein: The mutual inductor acquisition module comprises: A signal processing unit is connected to the second mutual inductor unit and is used to receive the second detection signal and obtain detection value information of the second detection signal.

3. The device as claimed in claim 2, wherein: The metering module comprises: A communication unit establishes a communication connection with the signal processing unit, and is used to receive the detection value information of the second detection signal sent by the signal processing unit through the communication connection.

4. The device as claimed in claim 3, wherein: The communication unit receives the second turns ratio sent by the signal processing unit through the communication connection.

5. The device according to claim 3, wherein: The signal processing unit and the communication unit establish the communication connection using a handshake protocol; Wherein, after the communication connection is successfully established, the signal processing unit sends the detection value information of the second detection signal to the communication unit through the communication connection.

6. The device according to claim 5, wherein: The signal processing unit sends a handshake frame, and if a response frame returned by the communication unit is received, the communication connection is successfully established; or, The communication unit sends a handshake frame, and if a response frame returned by the signal processing unit is received, the communication connection is established successfully.

7. The device of claim 3, wherein: The communication unit is further configured to interrupt the communication connection after determining that the configuration processing based on the first turns ratio is completed.

8. The device of claim 4, wherein: The metering module comprises: A configuration unit is respectively connected to the first mutual inductor unit, the communication unit and the storage unit, and is used to calculate the first turns ratio based on the detection value of the first detection signal, the second turns ratio and the detection value of the second detection signal, and store the first turns ratio in the storage unit.

9. The device of claim 8, wherein: The configuration unit is used to determine the first turns ratio ; Among them, B is the detection value of the second detection signal, C2 is the second turns ratio, and A is the detection value of the first detection signal.

10. The device of claim 8, wherein: The metering module comprises: a first display unit, connected to the communication unit and the configuration unit, respectively, and configured to display a state of the communication connection and / or an execution state of the configuration unit; The mutual inductor acquisition module comprises: The second display unit is connected to the signal processing unit and is used to display the status of the communication connection.

11. The device of claim 3, wherein: The communication unit includes: a first communication interface; the signal processing unit includes: a second communication interface; Wherein, the communication connection is established through the first communication interface and the second communication interface; the first communication interface and the second communication interface both include at least one of a bus interface, a wireless interface, and an industrial Ethernet interface.

12. The device of claim 1, wherein: The first mutual inductor unit includes: a closed-end mutual inductor; the second mutual inductor unit includes: a clamp-end mutual inductor.

13. The device of claim 1, wherein: The first detection signal and the second detection signal are both current signals or voltage signals.

14. An electric meter device, comprising: An electric energy metering device as claimed in any one of claims 1 to 13.

15. A configuration method for an electric energy metering device, comprising: Obtaining a first detection signal corresponding to the power transmission line through a first mutual inductor unit; Obtaining a second detection signal corresponding to the power transmission line through a mutual inductor acquisition module; Wherein, the second detection signal is obtained through the second mutual inductor unit of the mutual inductor acquisition module; the turns ratio of the second mutual inductor unit is the second turns ratio; The metering module obtains a first turns ratio of the first mutual inductor unit according to the first detection signal, the second detection signal and a second turns ratio corresponding to the mutual inductor acquisition module, and performs configuration processing based on the first turns ratio; Wherein, the first turns ratio is stored in a storage unit of the metering module.

16. The method according to claim 15, wherein obtaining the second detection signal corresponding to the power transmission line through the mutual inductor acquisition module comprises: The second detection signal is received by the signal processing unit of the mutual inductor acquisition module and the detection value information of the second detection signal is obtained.

17. The method of claim 16, further comprising: The communication unit of the metering module establishes a communication connection with the signal processing unit; The communication unit receives the detection value information of the second detection signal sent by the signal processing unit through the communication connection.

18. The method of claim 17, further comprising: The communication unit receives the second turns ratio sent by the signal processing unit through the communication connection.

19. The method of claim 17, further comprising: The signal processing unit and the communication unit establish the communication connection using a handshake protocol; After the communication connection is successfully established, the signal processing unit sends the detection value information of the second detection signal to the communication unit through the communication connection.

20. The method according to claim 19, wherein the signal processing unit and the communication unit use a handshake protocol to establish the communication connection, comprising: The signal processing unit sends a handshake frame, and if a response frame returned by the communication unit is received, the communication connection is successfully established; or, The communication unit sends a handshake frame, and if a response frame returned by the signal processing unit is received, the communication connection is established successfully.

21. The method of claim 17, further comprising: After determining that the configuration process based on the first turns ratio is completed, the communication unit interrupts the communication connection.

22. The method of claim 18, further comprising: The configuration unit of the metering module calculates the first turns ratio based on the detection value of the first detection signal, the second turns ratio and the detection value of the second detection signal, and stores the first turns ratio in a storage unit of the metering module.

23. The method of claim 22, wherein: The configuration unit determines the first turns ratio ; Among them, B is the detection value of the second detection signal, C2 is the second turns ratio, and A is the detection value of the first detection signal.

24. The method of claim 22, wherein: displaying the state of the communication connection and / or the execution state of the configuration unit via a first display unit of the metering module; The state of the communication connection is displayed by the second display unit of the mutual inductor acquisition module.

25. The method of claim 17, wherein the communication unit comprises: a first communication interface; The signal processing unit includes: a second communication interface; the method further includes: Establishing the communication connection through the first communication interface and the second communication interface; Wherein, the first communication interface and the second communication interface each include at least one of a bus interface, a wireless interface, and an industrial Ethernet interface.

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