Acquisition terminal and electric energy meter zero line testing device for electric energy meter

Abstract

The invention discloses an acquisition terminal and an electric energy meter zero line testing device for an electric energy meter, and the device comprises a current supply device, and the two ends of the current supply device are connected with a first zero line terminal of a first electric energy meter and a second zero line terminal of a last electric energy meter respectively. One end of each switch device is connected to the first zero line terminal of the previous electric energy meter in the two adjacent electric energy meters, and the other end of each switch device is connected to the second zero line terminal of the previous electric energy meter in the two adjacent electric energy meters and the first zero line terminal of the next electric energy meter in the two adjacent electric energy meters; when the switching device is switched on, the current provided by the current providing device flows through the switching device and enters other electric energy meters; and when the switching device is switched off, the current provided by the current providing device flows through the electric energy meter corresponding to the switching device. According to the invention, the zero line test efficiency can be improved.

Description

Technical Field

[0001] This application relates to the field of testing technologies, and particularly to a data acquisition terminal and a zero-line testing device for an electric energy meter. Background Art

[0002] In the fields of electric energy meter production and operation and maintenance, the accuracy and reliability of the zero-line function are the core elements to ensure the accuracy of electric energy metering. Traditional testing devices usually only support a single zero-line current loading function. If other items such as phase line testing and insulation resistance detection are required, different tooling or external devices need to be switched, resulting in fragmented testing processes and low efficiency of zero-line testing.

[0003] That is, the efficiency of zero-line testing in the prior art is low. Summary of the Invention

[0004] The embodiments of this application provide a data acquisition terminal and a zero-line testing device for an electric energy meter, which can improve the efficiency of zero-line testing.

[0005] In a first aspect, the data acquisition terminal and the zero-line testing device for an electric energy meter provided in this application are used to test the zero lines of multiple sequentially arranged electric energy meters. The electric energy meter includes a first zero-line terminal and a second zero-line terminal. The data acquisition terminal and the zero-line testing device for an electric energy meter include:

[0006] A current providing device, with both ends of the current providing device connected to the first zero-line terminal of the first electric energy meter and the second zero-line terminal of the last electric energy meter respectively. The current providing device is used to provide a preset current;

[0007] Multiple switching devices, with the multiple switching devices corresponding to the multiple electric energy meters one by one. One end of the switching device is connected to the first zero-line terminal of the upper electric energy meter among two adjacent electric energy meters, and the other end of the switching device is connected to the second zero-line terminal of the upper electric energy meter among two adjacent electric energy meters and the first zero-line terminal of the lower electric energy meter among two adjacent electric energy meters;

[0008] When the switching device is turned on, the current provided by the current providing device flows through the switching device and enters other electric energy meters, and no current flows through the electric energy meter corresponding to the switching device. An instruction to disassemble the electric energy meter corresponding to the switching device is issued; when the switching device is turned off, the current provided by the current providing device flows through the electric energy meter corresponding to the switching device, and the electric energy meter corresponding to the switching device is tested to obtain the test result of the electric energy meter corresponding to the switching device.

[0009] In an optional embodiment, the data acquisition terminal and the zero-line testing device for an electric energy meter include a control device, and the control device is used to control the turning on and off of the multiple switching devices;

[0010] When the control device controls the switch device to be turned on, the current provided by the current supply device flows through the switch device and into other electricity meters, and no current flows through the electricity meter corresponding to the switch device, and an instruction to remove the electricity meter corresponding to the switch device is issued; when the control device controls the switch device to be turned off, the current provided by the current supply device flows through the electricity meter corresponding to the switch device, and the electricity meter corresponding to the switch device is tested to obtain the test result of the electricity meter corresponding to the switch device.

[0011] In an optional embodiment, the control device tests the electricity meter corresponding to the switch device to obtain the test result of the electricity meter corresponding to the switch device.

[0012] In an optional embodiment, the control device tests the electricity meter corresponding to the switch device to obtain the test result of the electricity meter corresponding to the switch device, including:

[0013] Obtain the current measurement value of the electricity meter corresponding to the switch device;

[0014] Compare the current measurement value with the preset current to obtain the test result of the electricity meter corresponding to the switch device.

[0015] In an optional embodiment, the obtaining of the current measurement value of the electricity meter corresponding to the switch device includes:

[0016] Obtain the current readings of the electricity meter corresponding to the switch device at a preset frequency to obtain a current reading sequence;

[0017] Determine the current measurement value of the electricity meter corresponding to the switch device based on the current reading sequence.

[0018] In an optional embodiment, the electricity meter includes a first live wire terminal and a second live wire terminal, one end of the second live wire terminal is connected to one end of the first live wire terminal inside the electricity meter, the electricity meter zero line test device for the acquisition terminal and the electricity meter includes a plurality of voltage supply devices, the plurality of voltage supply devices correspond to the plurality of electricity meters one by one, and both ends of the voltage supply device are respectively connected to the first live wire terminal of the corresponding electricity meter and the first zero line terminal of the first electricity meter, and the voltage supply device is used to provide a preset voltage to the corresponding electricity meter.

[0019] In an optional embodiment, the voltage supply device is a voltage transformer.

[0020] In an optional embodiment, the switch device is a relay.

[0021] In an optional embodiment, the plurality of switch devices are independently turned on or off.

[0022] In an optional embodiment, the preset current is 5A.

[0023] In this application, compared with the related art, the zero-line testing device for the acquisition terminal and the electric energy meter includes: a current providing device, with both ends of the current providing device respectively connected to the first zero-line terminal of the first electric energy meter and the second zero-line terminal of the last electric energy meter, and the current providing device is used to provide a preset current; a plurality of switching devices, which correspond to the plurality of electric energy meters one by one. One end of the switching device is connected to the first zero-line terminal of the previous electric energy meter among two adjacent electric energy meters, and the other end of the switching device is connected to the second zero-line terminal of the previous electric energy meter among two adjacent electric energy meters and the first zero-line terminal of the next electric energy meter among two adjacent electric energy meters. When the switching device is turned on, the current provided by the current providing device flows through the switching device and enters other electric energy meters, and no current flows through the electric energy meter corresponding to the switching device, and an instruction to remove the electric energy meter corresponding to the switching device is issued. When the switching device is turned off, the current provided by the current providing device flows through the electric energy meter corresponding to the switching device, and the electric energy meter corresponding to the switching device is tested to obtain the test result of the electric energy meter corresponding to the switching device. In this application, when a plurality of switching devices are turned on, at this time, no current passes through each electric energy meter, and at this time, a plurality of electric energy meters can be quickly installed. After installation, the switching devices are turned off. At this time, the current provided by the current providing device flows through the electric energy meter corresponding to the switching device, and the electric energy meter corresponding to the switching device is tested to obtain the test result of the electric energy meter corresponding to the switching device. Each switching device is used to control the testing of the corresponding electric energy meter, and can test each electric energy meter separately, or can also test several of them simultaneously. After the testing is completed, the switching devices are turned on, and the current provided by the current providing device flows through the switching devices and enters other electric energy meters, and no current flows through the electric energy meter corresponding to the switching device, and an instruction to remove the electric energy meter corresponding to the switching device is issued. At this time, the electric energy meter can be removed separately, thereby improving the testing efficiency. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of an embodiment of the zero-line testing device for the acquisition terminal and the electric energy meter provided by the embodiment of the present application;

[0026] Figure 2 It is a schematic structural diagram of an embodiment of the zero-line testing system provided by the embodiment of the present application. Detailed Embodiments

[0027] It should be noted that the principle of this application is illustrated by being implemented in a suitable computing environment. The following description is based on the specific embodiments of this application illustrated, and it should not be regarded as limiting other specific embodiments of this application not detailed herein.

[0028] In the following description of this application, reference is made to "some embodiments", which describe a subset of all possible embodiments. However, it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0029] In the following description of this application, the terms "first", "second", and "third" are only used to distinguish similar objects and do not represent a specific order for the objects. It can be understood that "first", "second", and "third" can be interchanged in a specific order or sequence when allowed, so that the embodiments of this application described here can be implemented in an order other than that illustrated or described here.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0031] Although the description of this application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to this implementation. On the contrary, the purpose of introducing the application in conjunction with the implementation is to cover other alternatives or modifications that may extend based on the claims of this application. To provide a deep understanding of this application, many specific details will be included in the following description. This application can also be implemented without using these details. In addition, to avoid confusing or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other.

[0032] In the embodiments of this application, reference to "an embodiment" or "some embodiments" etc. means that in one or more embodiments of this application, specific features, structures, or characteristics described in conjunction with that embodiment are included. Thus, statements such as "in an embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in another way.

[0033] In the embodiments of this application, the terms "include", "comprise", "have" and their variants all mean "include but not limited to", unless otherwise specifically emphasized in another way.

[0034] In the embodiments of the present application, unless otherwise clearly defined and limited, the terms "installation" and "connection" shall be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0035] In the embodiments of the present application, "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0036] In the embodiments of the present application, the orientation terms mentioned, such as "upper", "lower", "left", "right", "inner", "outer", etc., are only references to the directions in the drawings. Therefore, the orientation terms used are for better and clearer illustration and understanding of the embodiments of the present application, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the embodiments of the present application.

[0037] Therefore, the present application provides a collection terminal and an electricity meter neutral line testing device for an electricity meter. The collection terminal and the electricity meter neutral line testing device for the electricity meter include: a current providing device, with both ends of the current providing device respectively connected to the first neutral line terminal of the first electricity meter and the second neutral line terminal of the last electricity meter, and the current providing device is used to provide a preset current; a plurality of switch devices, corresponding to a plurality of electricity meters one by one, one end of the switch device is connected to the first neutral line terminal of the previous electricity meter among two adjacent electricity meters, and the other end of the switch device is connected to the second neutral line terminal of the previous electricity meter among two adjacent electricity meters and the first neutral line terminal of the next electricity meter among two adjacent electricity meters; when the switch device is turned on, the current provided by the current providing device flows through the switch device and enters other electricity meters, and no current flows through the electricity meter corresponding to the switch device, and an instruction to disassemble the electricity meter corresponding to the switch device is issued; when the switch device is turned off, the current provided by the current providing device flows through the electricity meter corresponding to the switch device, and the electricity meter corresponding to the switch device is tested to obtain the test result of the electricity meter corresponding to the switch device.

[0038] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0039] Please refer to Figure 1The present application provides a zero-line testing device for an electric energy meter 11, the zero-line testing device for the electric energy meter 11 is used to test the zero lines of a plurality of electric energy meters 11 arranged in sequence, the electric energy meter 11 comprises a first zero-line terminal 113 and a second zero-line terminal 114, the zero-line testing device for the electric energy meter 11 comprises: a current providing device 14, the two ends of the current providing device 14 are respectively connected to the first zero-line terminal 113 of the first electric energy meter 11 and the second zero-line terminal 114 of the last electric energy meter 11, the current providing device 14 is used to provide a preset current; a plurality of switch devices 12, the plurality of switch devices 12 correspond to the plurality of electric energy meters 11 one by one, one end of the switch device 12 is connected to the first zero-line terminal 113 of the last electric energy meter 11 of the two adjacent electric energy meters 11 3. The other end of the switch device 12 is connected to the second neutral terminal 114 of the upper electric energy meter 11 of the two adjacent electric energy meters 11 and the first neutral terminal 113 of the lower electric energy meter 11 of the two adjacent electric energy meters 11; when the switch device 12 is turned on, the current provided by the current providing device 14 flows through the switch device 12 into the other electric energy meters 11, no current flows through the electric energy meter 11 corresponding to the switch device 12, and an instruction to disassemble the electric energy meter 11 corresponding to the switch device 12 is issued; when the switch device 12 is disconnected, the current provided by the current providing device 14 flows through the electric energy meter 11 corresponding to the switch device 12, the electric energy meter 11 corresponding to the switch device 12 is tested, and the test result of the electric energy meter 11 corresponding to the switch device 12 is obtained.

[0040] In the embodiment of the present application, the switch device 12 is a relay. The preset current is 5A. The current providing device 14 is used to provide a constant preset current. Relay, also known as a relay, is an electronic control device. It has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is usually used in automatic control circuits. It is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and conversion circuit in the circuit. The relay coil is represented by a rectangular symbol in the circuit. If the relay has two coils, draw two parallel rectangular boxes. At the same time, mark the text symbol "J" of the relay in the rectangular box or next to the rectangular box. There are two ways to represent the contacts of the relay: one is to draw them directly on one side of the rectangular box, which is a more intuitive representation.

[0041] In the embodiment of the present application, the plurality of switch devices 12 are independently connected or disconnected.

[0042] In the embodiments of the present application, the neutral line testing device of the electricity meter 11 includes a control device, which is used to control the on and off of a plurality of switch devices 12; when the control device controls the switch device 12 to be turned on, the current provided by the current providing device 14 flows through the switch device 12 and enters other electricity meters 11, and no current flows through the electricity meter 11 corresponding to the switch device 12, and an instruction to disassemble the electricity meter 11 corresponding to the switch device 12 is issued; when the control device controls the switch device 12 to be turned off, the current provided by the current providing device 14 flows through the electricity meter 11 corresponding to the switch device 12, and the electricity meter 11 corresponding to the switch device 12 is tested to obtain the test result of the electricity meter 11 corresponding to the switch device 12. Among them, the control device can be a computer.

[0043] In the embodiments of the present application, the control device tests the electricity meter 11 corresponding to the switch device 12 to obtain the test result of the electricity meter 11 corresponding to the switch device 12. In other embodiments, the switch of the switch device 12 can also be manually controlled by a human, and it can also be manually tested by a human.

[0044] In the embodiments of the present application, the control device tests the electricity meter 11 corresponding to the switch device 12 to obtain the test result of the electricity meter 11 corresponding to the switch device 12, including:

[0045] (1) Obtain the current measurement value of the electricity meter 11 corresponding to the switch device 12.

[0046] In a specific embodiment, to obtain the current measurement value of the electricity meter 11 corresponding to the switch device 12, the current readings of the electricity meter 11 corresponding to the switch device 12 are obtained at a preset frequency to obtain a current reading sequence; based on the current reading sequence, the current measurement value of the electricity meter 11 corresponding to the switch device 12 is determined.

[0047] Among them, the preset frequency can be 2hz, 1hz, etc., which can be set according to specific circumstances.

[0048] In a specific embodiment, the latest collected current reading in the current reading sequence is determined as the current measurement value of the electricity meter 11 corresponding to the switch device 12.

[0049] In another specific embodiment, the average value of the latest K collected current readings in the current reading sequence is determined as the current measurement value of the electricity meter 11 corresponding to the switch device 12. Among them, K is a positive integer greater than 2.

[0050] Further, when the control device obtains the disconnection instruction to disconnect the switch device 12, it controls the switch device 12 to disconnect, and after a preset duration of controlling the switch device 12 to disconnect, it obtains the current readings of the electricity meter 11 corresponding to the switch device 12 at a preset frequency to obtain a current reading sequence.

[0051] Further, obtain the coefficient of variation of the latest K current readings collected in the current reading sequence. When the coefficient of variation of the latest K current readings collected in the current reading sequence is less than a preset value, determine the average value of the latest K current readings collected in the current reading sequence as the current measurement value of the electricity meter 11 corresponding to the switching device 12.

[0052] Coefficient of Variation: When it is necessary to compare the degree of dispersion of two sets of data, if the measurement scales of the two sets of data differ too much, or the data dimensions are different, it is not appropriate to directly use the standard deviation for comparison. At this time, the influence of the measurement scale and dimension should be eliminated, and the coefficient of variation can achieve this. It is the ratio of the standard deviation of the original data to the average of the original data. CV has no dimension, so objective comparison can be carried out. In fact, it can be considered that the coefficient of variation, like the range, standard deviation, and variance, is an absolute value reflecting the degree of data dispersion. Its data size is affected not only by the degree of dispersion of the variable values but also by the average level of the variable values.

[0053] Further, control the switching device 12 to disconnect multiple times, and obtain the earliest reading time of the K current readings whose coefficient of variation is less than the preset value each time the switching device 12 disconnects. Determine the time difference between the earliest reading time and the time when the switching device 12 is controlled to disconnect as the test buffer duration, obtain multiple test buffer durations for multiple times of controlling the switching device 12 to disconnect, and determine the average value of the multiple test buffer durations as the preset duration.

[0054] (2) Compare the current measurement value with the preset current to obtain the test result of the electricity meter 11 corresponding to the switching device 12.

[0055] Determine the difference between the current measurement value and the preset current as the error value, and determine the ratio of the error value to the preset current as the error rate. When the error rate is higher than the preset error rate, determine the test result as abnormal; when the error rate is not higher than the preset error rate, determine the test result as normal.

[0056] In the embodiment of the present application, the electricity meter 11 includes a first live wire terminal 111 and a second live wire terminal 112. One end of the second live wire terminal 112 is connected to one end of the first live wire terminal 111 inside the electricity meter 11, and the second live wire terminal 112 is open. The electricity meter 11 zero line test device includes multiple voltage providing devices, and the multiple voltage providing devices correspond to the multiple electricity meters 11 one by one. Both ends of the voltage providing device are respectively connected to the first live wire terminal 111 of the corresponding electricity meter 11 and the first zero line terminal 113 of the first electricity meter 11, and the voltage providing device is used to provide a preset voltage to the corresponding electricity meter 11.

[0057] In the embodiments of the present application, the voltage providing device is a potential transformer. A potential transformer (abbreviated as PT for Potential transformer and also abbreviated as VT for Voltage transformer) is similar to a transformer and is an instrument used to transform the voltage on a line. However, the purpose of a transformer to transform voltage is to transmit electrical energy, so its capacity is very large, generally calculated in kilovolt - amperes or megavolt - amperes; while the purpose of a potential transformer to transform voltage is mainly to supply power to measuring instruments and relay protection devices, to measure the voltage, power, and electrical energy of a line, or to protect valuable equipment, motors, and transformers in the line when a fault occurs in the line. Therefore, the capacity of a potential transformer is very small, generally only a few volt - amperes or dozens of volt - amperes, and the maximum does not exceed one thousand volt - amperes. This article introduces its basic structure, working principle, main types, wiring methods, precautions, abnormalities and handling, as well as ferromagnetic resonance, etc.

[0058] Specifically, connect multiple switch devices. At this time, no current passes through each electricity meter, and multiple electricity meters can be quickly installed. After installation, disconnect the switch devices. At this time, the current provided by the current providing device flows through the electricity meter corresponding to the switch device, and test the electricity meter corresponding to the switch device to obtain the test result of the electricity meter corresponding to the switch device. Each switch device is used to control the test of the corresponding electricity meter, and can test each electricity meter separately or several electricity meters simultaneously. After the test is completed, connect the switch devices. The current provided by the current providing device flows through the switch devices and enters other electricity meters, and no current flows through the electricity meter corresponding to the switch device. Send an instruction to remove the electricity meter corresponding to the switch device, and at this time, the electricity meter can be removed separately, thereby improving the test efficiency.

[0059] As Figure 2 shown, the zero - line test system provided by the embodiments of the present application includes a master station system, a concentrator, acquisition terminals, and smart electricity meters. Specifically, the concentrator is connected to acquisition terminal 1 and acquisition terminal 2. Acquisition terminal 1 is connected to the smart electricity meter 1 of user 1, and acquisition terminal 2 is connected to the smart electricity meter 2 of user 2. The smart electricity meter is an electricity meter.

[0060] Master station system: Responsible for the data management and control center of the entire power system, and can receive, process, and store data from each acquisition terminal.

[0061] Concentrator: As the core hub connecting terminal devices, computers, or communication devices, it is often set at the center of cable convergence and is responsible for optimizing communication lines. It receives data from multiple acquisition terminals and uploads these data to the master station system through a more efficient communication method (such as a high - speed line).

[0062] Collection terminal: Responsible for real-time collection of data (such as voltage, current, power, etc.) from smart meters, and transmitting this data to the concentrator through communication methods such as RS-485 and power line carrier. A concentrator can be connected to multiple collection terminals, and each collection terminal can be connected to multiple smart meters.

[0063] Smart meter: Installed at the user end, used to accurately measure the consumption of electric energy and provide accurate electricity consumption data. The smart meter communicates with the collection terminal through a built-in communication module (such as RS-485, power line carrier, etc.) and uploads the electricity consumption data to the collection terminal.

[0064] User: Each smart meter corresponds to a user, and the user's electricity consumption situation is uploaded to the master station system in real time through the smart meter and the collection terminal.

[0065] Compared with the related technology, the electricity meter neutral line testing device for the collection terminal and the electricity meter includes: a current providing device, with both ends of the current providing device respectively connected to the first neutral line terminal of the first electricity meter and the second neutral line terminal of the last electricity meter, and the current providing device is used to provide a preset current; a plurality of switching devices, which correspond to the plurality of electricity meters one by one, one end of the switching device is connected to the first neutral line terminal of the previous electricity meter among two adjacent electricity meters, and the other end of the switching device is connected to the second neutral line terminal of the previous electricity meter among two adjacent electricity meters and the first neutral line terminal of the next electricity meter among two adjacent electricity meters; when the switching device is turned on, the current provided by the current providing device flows through the switching device and enters other electricity meters, and no current flows through the electricity meter corresponding to the switching device, and an instruction to disassemble the electricity meter corresponding to the switching device is issued; when the switching device is turned off, the current provided by the current providing device flows through the electricity meter corresponding to the switching device, and the electricity meter corresponding to the switching device is tested to obtain the test result of the electricity meter corresponding to the switching device. This application can improve the efficiency of neutral line testing.

[0066] The above has introduced in detail a kind of electricity meter neutral line testing device for the collection terminal and the electricity meter provided by this application. Specific examples are used in this article to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application; at the same time, for those skilled in the art, according to the idea of this application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to this application.

[0067] It should be noted that when the above embodiments of this application are applied to specific products or technologies, involving relevant user data, user permission or consent is required, and the collection, use and processing of relevant data need to comply with the relevant laws, regulations and standards of relevant countries and regions.

Claims

1. A collection terminal and an electric energy meter zero line test device for an electric energy meter, characterized in that: The acquisition terminal and the electric energy meter zero line test device for the electric energy meter are used to test the zero lines of multiple electric energy meters arranged in sequence, the electric energy meter includes a first zero line terminal and a second zero line terminal, and the acquisition terminal and the electric energy meter zero line test device for the electric energy meter include: A current providing device, two ends of which are respectively connected to a first neutral terminal of a first electric energy meter and a second neutral terminal of a last electric energy meter, and the current providing device is used to provide a preset current; A plurality of switch devices, each of the plurality of switch devices corresponds to a plurality of electric energy meters, one end of the switch device is connected to a first neutral line terminal of an upper electric energy meter between two adjacent electric energy meters, and the other end of the switch device is connected to a second neutral line terminal of an upper electric energy meter between two adjacent electric energy meters and a first neutral line terminal of a lower electric energy meter between two adjacent electric energy meters; When the switching device is turned on, the current provided by the current providing device flows through the switching device into other electric energy meters, no current flows through the electric energy meter corresponding to the switching device, and an instruction to dismantle the electric energy meter corresponding to the switching device is issued; when the switching device is disconnected, the current provided by the current providing device flows through the electric energy meter corresponding to the switching device, the electric energy meter corresponding to the switching device is tested, and the test result of the electric energy meter corresponding to the switching device is obtained.

2. The electric energy meter zero line test device for the acquisition terminal and the electric energy meter according to claim 1, characterized in that: The electric energy meter zero line test device for the acquisition terminal and the electric energy meter includes a control device, which is used to control the connection and disconnection of multiple switch devices; When the control device controls the switch device to be turned on, the current provided by the current providing device flows through the switch device into other electric energy meters, no current flows through the electric energy meters corresponding to the switch device, and an instruction to dismantle the electric energy meters corresponding to the switch device is issued; when the control device controls the switch device to be turned off, the current provided by the current providing device flows through the electric energy meter corresponding to the switch device, the electric energy meter corresponding to the switch device is tested, and the test result of the electric energy meter corresponding to the switch device is obtained.

3. The electric energy meter zero line test device for the acquisition terminal and the electric energy meter according to claim 2, characterized in that: The control device tests the electric energy meter corresponding to the switch device to obtain the test result of the electric energy meter corresponding to the switch device.

4. The electric energy meter zero line test device for the acquisition terminal and the electric energy meter according to claim 3, characterized in that: The control device tests the electric energy meter corresponding to the switch device to obtain the test result of the electric energy meter corresponding to the switch device, including: Obtaining a current measurement value of an electric energy meter corresponding to the switch device; The current measurement value is compared with the preset current to obtain a test result of the electric energy meter corresponding to the switch device.

5. The electric energy meter zero line test device for the acquisition terminal and the electric energy meter according to claim 4, characterized in that: The obtaining of the current measurement value of the electric energy meter corresponding to the switch device includes: Obtaining current readings of an electric energy meter corresponding to the switch device at a preset frequency to obtain a current reading sequence; A current measurement value of an electric energy meter corresponding to the switching device is determined based on the sequence of current readings.

6. The electric energy meter zero line test device for the acquisition terminal and the electric energy meter according to claim 1, characterized in that: The electric energy meter includes a first live wire terminal and a second live wire terminal, one end of the second live wire terminal and one end of the first live wire terminal are connected inside the electric energy meter, the acquisition terminal and the electric energy meter neutral wire testing device include multiple voltage providing devices, the multiple voltage providing devices correspond to multiple electric energy meters one by one, the two ends of the voltage providing device are respectively connected to the first live wire terminal of the corresponding electric energy meter and the first neutral wire terminal of the first electric energy meter, and the voltage providing device is used to provide a preset voltage to the corresponding electric energy meter.

7. The electric energy meter zero line test device for the acquisition terminal and the electric energy meter according to claim 6, characterized in that: The voltage providing device is a voltage transformer.

8. The electric energy meter zero line test device for the acquisition terminal and the electric energy meter according to claim 1, characterized in that: The switch device is a relay.

9. The electric energy meter zero line test device for the acquisition terminal and the electric energy meter according to claim 1, characterized in that: The plurality of switch devices are independently turned on or off.

10. The electric energy meter zero line test device for the acquisition terminal and the electric energy meter according to claim 1, characterized in that: The preset current is 5A.

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