An intelligent circuit breaker body and an intelligent circuit breaker device

Abstract

The application discloses a kind of intelligent circuit breaker body, comprising: current transformer, primary side is connected with power line, secondary side is connected with the one end of current transformer secondary wiring module, for gathering the current signal of the power line;Current transformer secondary wiring module, the other end is connected with external metering module, for providing freewheeling loop for the secondary side of the current transformer, to prevent the secondary side of the current transformer open circuit.The application also provides a kind of intelligent circuit breaker device with high-precision metering function, comprising: metering module and the circuit breaker body as described above;Metering module is used to obtain the calibration information of current transformer when metering module and current transformer are not matched, and the metering chip in the metering module is calculated and updated according to the calibration information Table information, so that the metering chip carries out accurate measurement of electric energy according to the updated Table information and the current data and voltage data of power line.

Description

Technical Field

[0001] This invention relates to the field of low-voltage power distribution technology, and more specifically, to a smart circuit breaker body and a smart circuit breaker device. Background Technology

[0002] As the most comprehensively covered device by power grid companies, smart meters are replaced or newly installed in considerable numbers every year. Considering the overall new situation, how to quickly, effectively, and in real time verify the accuracy of smart meters while minimizing investment, and scientifically and reasonably extend the service life of smart meters, has become a key issue.

[0003] The development of intelligent and networked power systems has placed metering requirements on circuit breakers. Since circuit breakers are inherently current protection devices, achieving effective metering without compromising their protective performance has become a priority. Simultaneously, ensuring uninterrupted power supply necessitates online hot-swappable metering modules. However, when replacing these modules in the field, the secondary side of the current transformer becomes open-circuited, leading to increased voltage and potentially damaging the circuit breaker itself. Summary of the Invention

[0004] This invention proposes an intelligent circuit breaker body and an intelligent circuit breaker device to solve the problem of how to protect and enhance the metering function of intelligent circuit breakers.

[0005] To address the aforementioned problems, according to one aspect of the present invention, a smart circuit breaker body is provided, the circuit breaker body comprising: a current transformer and a secondary wiring module for the current transformer; wherein...

[0006] The current transformer has its primary side connected to the power line and its secondary side connected to one end of the secondary wiring module of the current transformer, which is used to collect the current signal of the power line to obtain current data.

[0007] The secondary wiring module of the current transformer is connected at one end to an external metering module, and is used to provide a freewheeling circuit for the secondary side of the current transformer to prevent the secondary side of the current transformer from being open-circuited.

[0008] Preferably, the secondary side wiring module of the current transformer corresponds one-to-one with the current transformer; a current transformer is installed on each phase conductor of the power line.

[0009] Preferably, the secondary wiring module of the current transformer is a capacitor circuit, a resistor circuit, a RC circuit, or a diode circuit.

[0010] Preferably, when the secondary wiring module of the current transformer is a diode circuit, the secondary wiring module of the current transformer includes: a first diode and a second diode, wherein the anode of the first diode and the cathode of the second diode are connected to the secondary side of the current transformer; the cathode of the first diode and the anode of the second diode are connected to the secondary side of the current transformer.

[0011] Preferably, the circuit breaker body further includes:

[0012] The first storage module is used to store the calibration information of the current transformer.

[0013] Preferably, the circuit breaker body further includes:

[0014] The voltage direct conversion module is connected to the power line at one end and to the metering module at the other end. It is used to collect the voltage signal of the power line to obtain voltage data.

[0015] Preferably, the circuit breaker body further includes: a control module and a tripping mechanism;

[0016] The control module is used to send a trip control command to the tripping mechanism when it is determined that the main circuit current of the circuit breaker body is abnormal, so as to control the tripping mechanism to trip.

[0017] The tripping mechanism is used to perform a tripping operation according to the tripping control command.

[0018] Preferably, the circuit breaker body further includes:

[0019] An interface module, connected to the metering module, is a socket or pin soldered to a pad on a feature recording board, used to enable data communication between the circuit breaker body and the metering module; wherein the circuit breaker body and the metering module are connected in a plug-in manner through the interface module.

[0020] According to another aspect of the present invention, a smart circuit breaker device with high-precision metering function is provided, the device comprising: the metering module and a circuit breaker body as described in any of the preceding claims; wherein,

[0021] The metering module is used to acquire the calibration information of the current transformer when the metering module and the current transformer are mismatched, and to calculate and update the calibration information of the metering chip in the metering module according to the calibration information, so that the metering chip can accurately measure the electrical energy according to the updated calibration information and the current and voltage data of the power line.

[0022] Preferably, the metering module further includes:

[0023] A communication line is used to enable communication between the metering module and the host computer.

[0024] A power supply module is used to supply power to the metering module.

[0025] This invention provides an intelligent circuit breaker body with a current transformer secondary wiring module. This module provides a freewheeling circuit to the secondary side of the current transformer when the pluggable metering module is removed, preventing open circuits on the secondary side. The invention also provides an intelligent circuit breaker device with high-precision metering capabilities, comprising a metering module and a circuit breaker body. When the metering module and the current transformer are mismatched, the metering module acquires the calibration information of the current transformer and calculates and updates the calibration information of the metering chip in the metering module based on this calibration information. This allows the metering chip to accurately measure electrical energy based on the updated calibration information and the current and voltage data of the power line, improving the high-precision metering capability of the circuit breaker. Attached Figure Description

[0026] Exemplary embodiments of the present invention can be more fully understood by referring to the following figures:

[0027] Figure 1 This is a schematic diagram of the structure of the intelligent circuit breaker body 100 according to an embodiment of the present invention;

[0028] Figure 2 This is an example diagram of an intelligent circuit breaker device according to an embodiment of the present invention;

[0029] Figure 3 This is an example diagram of an intelligent circuit breaker device according to an embodiment of the present invention;

[0030] Figure 4 A circuit diagram of a diode circuit for the secondary wiring module of a current transformer according to an embodiment of the present invention;

[0031] Figure 5 A circuit diagram showing that the secondary wiring module of the current transformer according to an embodiment of the present invention is a resistive circuit.

[0032] Figure 6 This is a schematic diagram of an intelligent circuit breaker device according to an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the metering module according to an embodiment of the present invention;

[0034] Figure 8 This is a schematic diagram of the metering module according to an embodiment of the present invention. Detailed Implementation

[0035] Exemplary embodiments of the invention will now be described with reference to the accompanying drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to fully and completely disclose the invention and to fully convey its scope to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the drawings is not intended to limit the invention. In the drawings, the same units / elements are referred to by the same reference numerals.

[0036] Unless otherwise stated, the terms used herein (including technical terms) have their common meaning as understood by one of ordinary skill in the art. Furthermore, it is understood that terms defined in commonly used dictionaries should be understood to have a meaning consistent with the context of their relevant field, and not to be interpreted as having an idealized or overly formal meaning.

[0037] This invention provides an intelligent circuit breaker body with a current transformer secondary wiring module. This module provides a freewheeling circuit to the secondary side of the current transformer when the pluggable metering module is removed, preventing open circuits on the secondary side. The invention also provides an intelligent circuit breaker device with high-precision metering capabilities, comprising a metering module and a circuit breaker body. When the metering module and the current transformer are mismatched, the metering module acquires the calibration information of the current transformer and calculates and updates the calibration information of the metering chip in the metering module based on this calibration information. This allows the metering chip to accurately measure electrical energy based on the updated calibration information and the current and voltage data of the power line, improving the high-precision metering capability of the circuit breaker.

[0038] Figure 1 This is a schematic diagram of the structure of the intelligent circuit breaker body 100 according to an embodiment of the present invention. Figure 1 As shown, the intelligent circuit breaker body 100 provided in this embodiment of the invention includes: a current transformer 101 and a current transformer secondary wiring module 102.

[0039] Preferably, the primary side of the current transformer 101 is connected to the power line, and the secondary side is connected to one end of the secondary wiring module of the current transformer, for collecting the current signal of the power line to obtain current data.

[0040] Preferably, the other end of the current transformer secondary wiring module 102 is connected to an external metering module to provide a freewheeling circuit for the secondary side of the current transformer, so as to prevent the secondary side of the current transformer from being open-circuited.

[0041] In this invention, a current transformer secondary wiring module is provided in the circuit breaker body. One end of the current transformer secondary wiring module is connected to the current transformer, and the other end is connected to an external metering module. It can be used to provide a freewheeling circuit for the secondary side of the current transformer when the external pluggable metering module is unplugged, thereby preventing the secondary side of the current transformer from being open-circuited.

[0042] Preferably, the secondary side wiring module of the current transformer corresponds one-to-one with the current transformer; a current transformer is installed on each phase conductor of the power line.

[0043] Preferably, the secondary wiring module of the current transformer is a capacitor circuit, a resistor circuit, a RC circuit, or a diode circuit.

[0044] Preferably, when the secondary wiring module of the current transformer is a diode circuit, the secondary wiring module of the current transformer includes: a first diode and a second diode, wherein the anode of the first diode and the cathode of the second diode are connected to the secondary side of the current transformer; the cathode of the first diode and the anode of the second diode are connected to the secondary side of the current transformer.

[0045] Preferably, the circuit breaker body 100 further includes:

[0046] The first storage module is used to store the calibration information of the current transformer.

[0047] Preferably, the circuit breaker body 100 further includes:

[0048] The voltage direct conversion module is connected to the power line at one end and to the metering module at the other end. It is used to collect the voltage signal of the power line to obtain voltage data.

[0049] Preferably, the circuit breaker body 100 further includes: a control module and a tripping mechanism;

[0050] The control module is used to send a trip control command to the tripping mechanism when it is determined that the main circuit current of the circuit breaker body is abnormal, so as to control the tripping mechanism to trip.

[0051] The tripping mechanism is used to perform a tripping operation according to the tripping control command.

[0052] Preferably, the circuit breaker body 100 further includes:

[0053] An interface module, connected to the metering module, is a socket or pin soldered to a pad on a feature recording board, used to enable data communication between the circuit breaker body and the metering module; wherein the circuit breaker body and the metering module are connected in a plug-in manner through the interface module.

[0054] Combination Figure 2 As shown, the circuit breaker body 1 in this embodiment of the invention includes: a current transformer 13, a current transformer secondary wiring module 151, an interface module 14, a control module 11, and a tripping mechanism 12. The current transformer secondary wiring module is integrated on a feature recording board 15. The feature recording board 15 stores the current calibration information of the current transformer 13. Its first end is connected to the power line, its second end is connected to the power line via the current transformer 13, and its third end is connected to the first end of a pluggable metering module 2 via the interface module 14. The feature recording board 15 contains the current transformer secondary wiring module 151, whose first end is connected to the secondary side of the current transformer, and its second end is connected to the interface module 14. This module forms a freewheeling circuit for the secondary side of the current transformer when the pluggable metering module 2 is removed. In actual operation, when the circuit breaker is connected to a three-phase power line, the feature recording board 15 has three built-in secondary wiring modules 151 for current transformers so that when the pluggable metering module 2 is unplugged, a freewheeling circuit is provided for the secondary side of the current transformer 13.

[0055] like Figure 2 As shown, the second end of the pluggable metering module 2 is connected to the first end of the control module 11. It is used to collect the voltage and current of the power line, calculate the calibration information of the metering chip according to the current calibration information, and write the calculated calibration information into the metering chip so that the metering chip can perform power metering according to the calibration information.

[0056] In actual working conditions, the current transformer 13 in this embodiment of the invention should be three, with the primary side of each current transformer 13 connected in series to one phase of AC power line, and the feature recording board 15 contains three secondary wiring modules for the current transformer 13.

[0057] To match the accuracy deviation between the current transformer 13 within the circuit breaker body 1 and the metering module to be replaced, the feature recording board 15 of this embodiment stores the current calibration information of each current transformer 13. When the metering module to be replaced (pluggable metering module 2) is inserted into the interface module 14, the pluggable metering module 2 is connected to the feature recording board 15. At this time, the current calibration information of the current transformer 13 is transmitted to the pluggable metering module 2, and the pluggable metering module 2 is connected to the power line through the feature recording board 15 and the current transformer 13. The pluggable metering module 2 collects the voltage and current of the power line and calculates the electrical parameters of the power line based on the current calibration information and the voltage and current of the power line. The interface module 14 is a socket or pin soldered to the pads of the feature recording board 15.

[0058] like Figure 2As shown, in this embodiment of the invention, the second end of the control module 11 is connected to the tripping mechanism 12, and is used to send a tripping control command to the tripping mechanism when it is determined that the main circuit current of the circuit breaker body is abnormal, so as to control the tripping mechanism 12 to trip.

[0059] like Figure 3 As shown, the feature recording board 15 of this embodiment of the invention further includes a voltage direct conversion module 152 and a storage module 153 (i.e., a first storage module). The voltage direct conversion module 152 has a first end connected to the power line and a second end connected to the interface module 14, and is used to transmit the voltage of the power line to the pluggable metering module 2 through the interface module 14. The storage module 153 is connected to the interface module 14 and internally stores the current calibration information of the current transformer 13.

[0060] In this embodiment of the invention, when calibrating the current transformer 13, a standard metering device is inserted into the interface module 14, and a calibration bench is used to simulate various operating conditions of the power line according to different preset electrical parameters. The standard metering device collects the voltage and current of the power line under various operating conditions, and obtains the current calibration information of the current transformer 13 based on the voltage and current of the power line and the corresponding preset electrical parameters.

[0061] In one specific embodiment, such as Figure 4 As shown, when the secondary wiring module 151 of the current transformer is a diode circuit, it includes: a first diode D1 and a second diode D2. The anode of the first diode D1 and the cathode of the second diode D2 are connected to the first terminal of the secondary side of the current transformer; the cathode of the first diode D1 and the anode of the second diode D2 are connected to the first terminal of the secondary side of the current transformer 13.

[0062] Figure 4 The LA+ and LA- terminals are inserted into the interface module 14. In practical applications, the secondary side of the current transformer 13 is not allowed to be open-circuited. When the module is hot-swapped, in order to ensure that the secondary side of the transformer is not open-circuited, two anti-parallel diodes are arranged in the circuit to form a path for the secondary AC current, ensuring safety. In addition, the two anti-parallel diodes will not affect the secondary side electrical signal when the secondary side voltage of the current loop is low.

[0063] In one specific embodiment, such as Figure 5 As shown, when the secondary wiring module 151 of the current transformer is a resistive circuit, it includes a resistor R connected in parallel with the secondary side of the current transformer. Connecting the resistor R in parallel with the secondary side of the current transformer ensures that the secondary side of the current transformer is not open-circuited. It should be noted that, in this embodiment of the invention, other circuit structures that can provide a freewheeling circuit for the current transformer 13 can also be used.

[0064] Figure 6This is a schematic diagram of a smart circuit breaker device according to an embodiment of the present invention. Figure 6 As shown, the intelligent circuit breaker device 600 with high-precision metering function provided by the present invention includes: the metering module 601 and the circuit breaker body 602. The circuit breaker body 602 is consistent with any of the circuit breaker bodies 100 described above, and will not be described again here.

[0065] Preferably, the metering module 601 is used to acquire the calibration information of the current transformer when the metering module and the current transformer are mismatched, and to calculate and update the calibration information of the metering chip in the metering module according to the calibration information, so that the metering chip can accurately measure electrical energy according to the updated calibration information and the current and voltage data of the power line.

[0066] Preferably, the metering module 601 further includes:

[0067] A communication line is used to enable communication between the metering module and the host computer.

[0068] Preferably, the metering module 601 further includes:

[0069] A power supply module is used to supply power to the metering module.

[0070] In this invention, an intelligent circuit breaker device with high-precision metering function includes: a circuit breaker body and a pluggable metering module. The circuit breaker body is consistent with the circuit breaker body described above, and will not be repeated here. Combined with... Figure 2-7 As shown, the pluggable metering module 2 is connected to the circuit breaker body 1. When the metering module and the current transformer are mismatched, it obtains the calibration information of the current transformer and calculates and updates the calibration information of the metering chip in the metering module according to the calibration information, so that the metering chip can accurately measure the electrical energy according to the updated calibration information and the current and voltage data of the power line.

[0071] In this invention, such as Figure 7 As shown, the pluggable metering module 2 includes a data acquisition circuit 21 and a metering circuit 22. The first end of the data acquisition circuit 21 is connected to the voltage direct conversion module 152 and the current transformer secondary wiring module 151 via the interface module 14, and its second end is connected to the first end of the metering circuit 22, used to acquire the voltage and current of the power line. The first end of the metering circuit 22 is connected to the storage module 153 via the interface module 14, and its second end is connected to the control module 11, used to calculate the electrical parameters of the power line based on the current calibration information, the voltage and current of the power line, and to perform accurate metering of electrical energy. The metering circuit first revises the acquired voltage and current based on the current calibration information, and then calculates the electrical parameters of the power line based on the revised voltage and current.

[0072] In one specific embodiment, such as Figure 8 As shown, the pluggable metering module 2 also includes a power supply circuit 23 and a communication circuit 24. The power supply circuit 23 is used to supply power to the metering circuit 22 and the acquisition circuit 21; the communication circuit 24 is used to realize communication between the metering circuit and the host computer.

[0073] The circuit breaker body provided by this invention has a built-in feature recording board that serves not only as a connection link between the power line and the pluggable metering module, and between the current transformer and the pluggable metering module, but also stores the current calibration information of the current transformer. The pluggable metering module calculates the calibration information of the metering chip based on the current calibration information and writes the calibration information into the metering chip. The metering chip then calculates and updates the calibration information of the metering chip in the metering module based on the calibration information, so that the metering chip can accurately measure electrical energy based on the updated calibration information and the current and voltage data of the power line. This improves the high-precision metering capability of the circuit breaker and prevents malfunctions caused by mismatch between the pluggable metering module and the current transformer. The feature recording board also has a built-in secondary wiring module for the current transformer, which provides a freewheeling circuit to the secondary side of the current transformer when the pluggable metering module is disconnected, preventing the secondary side of the current transformer from opening.

[0074] The purpose of this invention is to deploy high-precision smart circuit breakers based on the actual situation of the power system, aiming to support the replacement of inaccurate smart meters, improve power management, and reduce line losses in transformer areas. This involves interconnecting with existing electricity meters and data collection systems to build a new power management architecture with the electricity metering box as the node. This architecture enables monitoring of voltage, current, and energy consumption, and allows for segmented, refined data management. The metering box serves as the unit boundary, controlling the accuracy of the electricity meters within it. Adding high-precision smart circuit breakers establishes the correspondence between the metering box, switches, and electricity meters, facilitating further refined management of power assets. The high-precision smart circuit breakers achieve a metering accuracy of 0.5, sharing the same data source and time frame as the electricity meters in the same metering box. The collected data, while ensuring accuracy, can be compared and analyzed with the corresponding electricity meters.

[0075] The present invention relates to the impact of current transformer parameters on the accuracy of split metering modules, comprising the following parts: 1. Standardizing the performance parameters of current transformers through standards or specifications to ensure applicability to metering modules with different accuracy levels. 2. Before leaving the factory, calibrating the metering module using a standard source and a current transformer with accuracy performance at least twice the accuracy level of the metering module, and marking its calibration parameters on the metering module. 3. Before leaving the circuit breaker body, calibrating the transformers inside the body using a standard source and a metering module with accuracy performance at least twice the accuracy level of the metering module, and marking its current calibration parameters on the feature recording plate built into the body. 4. At the installation site, inserting or replacing a new metering module allows for plug-and-play operation, completing the on-site replacement of the metering module.

[0076] In addition, the ratio difference of the current transformer should be maintained within the ratio difference range, and it should be as positively deflected as possible to improve the accuracy of the overall metering module. Appropriate transverse magnetic field treatment should be applied to the current transformer to improve its performance and consistency.

[0077] The invention has been described with reference to a few embodiments. However, as will be known to those skilled in the art, and as defined in the appended claims, other embodiments besides those disclosed above fall equivalently within the scope of the invention.

[0078] Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the art, unless otherwise expressly defined herein. All references to “a / the / the [device, component, etc.]” ​​are openly interpreted as at least one instance of said device, component, etc., unless otherwise expressly stated. The steps of any method disclosed herein need not be performed in the exact order disclosed unless explicitly stated otherwise.

[0079] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0080] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0081] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0082] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A smart circuit breaker device with high precision metering function, characterized in that, The device comprises a metering module and a circuit breaker body; wherein, The metering module is configured to acquire calibration information of the current transformer when the metering module and the current transformer are not matched, and to calculate and update calibration information of a metering chip in the metering module according to the calibration information, so that the metering chip performs accurate metering of electric energy according to the updated calibration information and current data and voltage data of a power line; The circuit breaker body comprises a current transformer and a current transformer secondary wiring module; wherein, The current transformer is connected to the power line at a primary side and connected to one end of the current transformer secondary wiring module at a secondary side, and is configured to collect current signals of the power line to acquire current data; The current transformer secondary wiring module is connected to an externally connected metering module at the other end, and is configured to provide a freewheeling loop for the secondary side of the current transformer to prevent the secondary side of the current transformer from being open-circuited; The current transformer secondary wiring module and the current transformer correspond to each other; one current transformer is arranged on each phase conductor of the power line; The circuit breaker body further comprises: A first storage module configured to store the calibration information of the current transformer.

2. The apparatus of claim 1, wherein, The current transformer secondary wiring module is a capacitor circuit, a resistor circuit, a resistor-capacitor circuit, or a diode circuit.

3. The apparatus of claim 1, wherein, When the current transformer secondary wiring module is a diode circuit, the current transformer secondary wiring module comprises a first diode and a second diode, an anode of the first diode and a cathode of the second diode are connected to the secondary side of the current transformer, and a cathode of the first diode and an anode of the second diode are connected to the secondary side of the current transformer.

4. The apparatus of claim 1, wherein, The circuit breaker body further comprises: A voltage direct conversion module connected to the power line at one end and connected to the metering module at the other end, and configured to collect voltage signals of the power line to acquire voltage data.

5. The apparatus of claim 1, wherein, The circuit breaker body further comprises a control module and a tripping mechanism; The control module is configured to send a tripping control instruction to the tripping mechanism to control the tripping mechanism to trip when it is determined that the main loop current of the circuit breaker body is abnormal; The tripping mechanism is configured to perform tripping operation according to the tripping control instruction.

6. The apparatus of claim 1, wherein, The circuit breaker body further comprises: An interface module connected to the metering module, which is a socket or a pin soldered to a pad on a feature recording plate, and is configured to realize data communication between the circuit breaker body and the metering module; wherein the circuit breaker body and the metering module are plug-in connected through the interface module.

7. The apparatus of claim 1, wherein, The metering module further comprises: A communication line configured to realize communication between the metering module and an upper computer; A power supply module configured to supply power to the metering module.

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