Function detection device and method for distributed power supply access unit

Abstract

The invention discloses a function detection device and method for a distributed power supply access unit, and the device comprises an upper computer which is used for carrying out the man-machine interaction, obtaining a detection task, and issuing a control command and a test message based on the detection task; the front-end processor is used for realizing data forwarding between the upper computer and the controlled voltage source as well as between the standard meter and the test meter table, and providing bridging service for data interaction; the program control voltage source is used for powering on or powering off the to-be-tested distributed power supply access unit according to the power supply control instruction of the upper computer; the standard meter is used for comparing with an alternating current sampling result of the to-be-tested distributed power supply access unit in a testing process so as to calculate an error; and the test table is used for carrying out function test on the to-be-tested distributed power supply access unit based on the test message. According to the equipment, the construction defect of the detection capability of the distributed power supply access unit is overcome, the market blank is filled, the detection speed is high, the labor intensity can be effectively reduced through the automatic connection technology, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of electrical measurement technology, and more specifically, to a function detection device and method for a distributed power supply access unit. Background Art

[0002] In order to promote the healthy and orderly development of distributed photovoltaics and improve the management level of distributed photovoltaics, the power grid has formulated the specifications for the grid connection of distributed photovoltaic power stations. In order to improve the management level of distributed photovoltaics, a typical design scheme for low-voltage distributed photovoltaics was launched, and a new distributed power access unit was developed.

[0003] Therefore, in order to improve the reliability of distributed power access unit product design and the need for stable operation, a function detection device and method for distributed power access unit is needed. Summary of the invention

[0004] The present invention provides a function detection device and method for a distributed power access unit, so as to solve the problem of how to efficiently perform function detection on the distributed power access unit.

[0005] In order to solve the above problem, according to one aspect of the present invention, a function detection device for a distributed power supply access unit is provided, the device comprising: a host computer, a front-end processor, a programmable voltage source, a standard meter and at least one test table;

[0006] The host computer is used for human-computer interaction and obtaining detection tasks, and issuing control commands and test messages based on the detection tasks;

[0007] The front-end is connected to the host computer, the program-controlled voltage source, the standard meter and the test table respectively, and is used to realize the forwarding of data between the host computer and the program-controlled voltage source, the standard meter and the test table, and provide a bridge service for data interaction;

[0008] The program-controlled voltage source is used to supply power or cut off power to the distributed power access unit to be tested according to the power control instruction of the host computer;

[0009] The standard table is used to compare with the cross-collection results of the distributed power access unit to be tested during the test process to calculate the error;

[0010] The test table is connected to the distributed power access unit to be tested, and is used to perform a functional test on the distributed power access unit to be tested based on the test message.

[0011] Preferably, the test table comprises: an automatic crimping module, a station control module, a power consumption detection module and a test interface module; wherein,

[0012] The automatic crimping module is used to physically connect the distributed power access unit to be tested with the table test interface module;

[0013] The station control module is used to power on and off the distributed power access unit to be tested as required during the test process, and indicate its current status;

[0014] The power consumption detection module is used to measure the power consumption of the distributed power access unit to be tested in the communication and non-communication states during the test process;

[0015] The test interface module is used to connect all physical interfaces of the distributed power access unit to be tested to the test table to form a communication link during the test process.

[0016] Preferably, the functional test includes: functional test, data transmission test and stability test; wherein,

[0017] The functional test categories include: flexible adjustment test, parameter setting and query test, downlink monitoring test, event recording and reporting test, protocol conversion test, initialization test, voltage basic error measurement, clock call test and synchronization, data and clock retention test, local function test, software upgrade test and protocol consistency test;

[0018] The data transmission test category includes: data transmission performance test, symmetric key update test, power supply impact test and power consumption test;

[0019] The stability test category includes: continuous power-on stability test.

[0020] Preferably, when conducting a basic voltage error test, a programmable voltage source provides test power to the standard meter and each distributed power access unit to be tested, and the front-end machine obtains the sampling values ​​of the distributed power access unit to be tested and the standard meter through RS485 communication, and forwards them to the host computer through the UDP protocol. The host computer calculates the error and determines whether the requirements are met.

[0021] Preferably, when conducting downlink detection tests and protocol conversion tests, the downlink device used is a virtual device, namely a virtual inverter. During the test, the front-end machine serves as a transit platform to connect the host computer, the distributed power access unit to be tested and the virtual inverter in series.

[0022] According to another aspect of the present invention, there is provided a function detection method based on the function detection device of the distributed power supply access unit as described above, the method comprising:

[0023] Use the host computer for human-computer interaction, obtain detection tasks, and issue control commands and test messages based on the detection tasks;

[0024] The front-end is used to forward data between the host computer and the voltage control source, standard meter and test table, providing bridge service for data interaction;

[0025] The program-controlled voltage source supplies power or cuts off power to the distributed power access unit to be tested according to the power control instruction of the host computer;

[0026] The test table performs a functional test on the distributed power access unit to be tested based on the test message;

[0027] During the test, the standard table is compared with the sampling results of the distributed power access unit to be tested to calculate the error.

[0028] Preferably, the method further comprises:

[0029] Use the automatic crimping module in the test table to physically connect the distributed power access unit to be tested with the table test interface module;

[0030] Using the station control module in the test table, during the test process, the distributed power access unit to be tested is powered on and off as required, and its current status is indicated;

[0031] The power consumption of the distributed power access unit to be tested in the communication and non-communication states is measured by using the power consumption detection module in the test table during the test process;

[0032] By using the test interface module in the test table, during the test process, all physical interfaces of the distributed power access unit to be tested are connected to the table to form a communication link.

[0033] Preferably, the functional test includes: functional test, data transmission test and stability test; wherein,

[0034] The functional test categories include: flexible adjustment test, parameter setting and query test, downlink monitoring test, event recording and reporting test, protocol conversion test, initialization test, voltage basic error measurement, clock call test and synchronization, data and clock retention test, local function test, software upgrade test and protocol consistency test;

[0035] The data transmission test category includes: data transmission performance test, symmetric key update test, power supply impact test and power consumption test;

[0036] The stability test category includes: continuous power-on stability test.

[0037] Preferably, the method further comprises:

[0038] When conducting the basic voltage error test, the programmable voltage source provides test power to the standard meter and each distributed power access unit to be tested. The front-end machine obtains the sampling values ​​of the distributed power access unit to be tested and the standard meter through RS485 communication, and forwards them to the host computer through the UDP protocol. The host computer calculates the error and determines whether it meets the requirements.

[0039] Preferably, the method further comprises:

[0040] When conducting downlink detection tests and protocol conversion tests, the downlink device uses a virtual method, which is a virtual inverter. During the test, the front-end machine serves as a transfer platform to connect the host computer, the distributed power access unit to be tested, and the virtual inverter in series.

[0041] The present invention provides a functional detection device and method for a distributed power access unit, including: a host computer, used for human-computer interaction and obtaining detection tasks, and issuing control commands and test messages based on the detection tasks; a front-end, used to realize the forwarding of data between the host computer and the voltage control source, standard table and test table, and provide bridging services for data interaction; a programmable voltage source, used to power on or off the distributed power access unit to be tested according to the power control instruction of the host computer; a standard table, used to compare with the acquisition results of the distributed power access unit to be tested during the test process to calculate the error; a test table, used to perform functional testing on the distributed power access unit to be tested based on the test message. The device of the present invention makes up for the construction shortcomings of the detection capability of the distributed power access unit and fills the gap in the market. Not only is the detection speed fast, but the automatic connection technology equipped in the detection equipment can effectively reduce labor intensity and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0043] Figure 1 It is a structural schematic diagram of a function detection device 100 of a distributed power supply access unit according to an embodiment of the present invention;

[0044] Figure 2 is a schematic diagram of the appearance of a function detection device according to an embodiment of the present invention;

[0045] Figure 3 is a structural schematic diagram of a function detection device according to an embodiment of the present invention;

[0046] Figure 4 A schematic diagram of a detection item according to an embodiment of the present invention;

[0047] Figure 5 A schematic diagram of a voltage basic error measurement test of a detection device according to an embodiment of the present invention;

[0048] Figure 6 A general functional test principle diagram of a detection device according to an embodiment of the present invention;

[0049] Figure 7 This is a principle diagram of a data transmission function test of a detection party device according to an embodiment of the present invention;

[0050] Figure 8 A schematic diagram of a power supply impact test of a detection party device according to an embodiment of the present invention;

[0051] Fig. 9 A schematic diagram of a power consumption test of a detection device according to an embodiment of the present invention;

[0052] Fig.10 Flow chart of a method 1000 for detecting a function of a distributed power supply access unit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0053] Now, exemplary embodiments of the present invention are described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0054] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0055] Figure 1 FIG. 1 is a schematic diagram of the structure of a function detection device 100 of a distributed power supply access unit according to an embodiment of the present invention. Figure 1 As shown, the functional detection device of the distributed power access unit provided by the embodiment of the present invention makes up for the shortcomings in the construction of the detection capability of the distributed power access unit and fills the gap in the market. Not only is the detection speed fast, but the automatic connection technology equipped in the detection device can effectively reduce the labor intensity and improve the work efficiency. The functional detection device of the distributed power access unit provided by the embodiment of the present invention includes: a host computer 101, a front-end machine 102, a programmable voltage source 103, a standard meter 104 and at least one test table 105.

[0056] Preferably, the host computer 101 is used for human-computer interaction and obtaining detection tasks, and issuing control commands and test messages based on the detection tasks.

[0057] Preferably, the front-end processor 102 is connected to the host computer, the programmable voltage source, the standard meter and the test table respectively, and is used to realize data forwarding between the host computer and the programmable voltage source, the standard meter and the test table, and provide a bridge service for data interaction.

[0058] Preferably, the programmable voltage source 103 is used to supply power to or cut off power to the distributed power access unit to be tested according to the power control instruction of the host computer.

[0059] Preferably, the standard table 104 is used to compare with the sampling result of the distributed power access unit to be tested during the test process to calculate the error.

[0060] Preferably, the test table 105 is connected to the distributed power access unit to be tested, and is used to perform a functional test on the distributed power access unit to be tested based on the test message.

[0061] Preferably, the test table comprises: an automatic crimping module, a station control module, a power consumption detection module and a test interface module; wherein,

[0062] The automatic crimping module is used to physically connect the distributed power access unit to be tested with the table test interface module;

[0063] The station control module is used to power on and off the distributed power access unit to be tested as required during the test process, and indicate its current status;

[0064] The power consumption detection module is used to measure the power consumption of the distributed power access unit to be tested in the communication and non-communication states during the test process;

[0065] The test interface module is used to connect all physical interfaces of the distributed power access unit to be tested to the test table to form a communication link during the test process.

[0066] In the present invention, the appearance of the detection device is as follows Figure 2 As shown, it mainly consists of three parts: human-machine interface (including software), power supply cabinet and test table. The test table contains 12 table positions, and the power supply cabinet has a programmable voltage source and a high-precision standard table.

[0067] The detection device of the present invention is a device that includes a software and hardware integrated solution. Figure 3As shown, in the present invention, the software part is mainly composed of a host computer and a front-end computer. The host computer is responsible for the detection scheme and the human-machine interface, and the front-end computer is responsible for the communication port monitoring and data packet forwarding; the hardware part is composed of a power supply cabinet and a test table. The power supply cabinet is responsible for providing a reference power supply and a reference value for the test, and the test table is responsible for connecting to each unit to be tested, providing modules such as automatic crimping, work station control, power consumption detection, and a test interface. The above sub-parts work together under the scheduling of the host computer to complete the detection task.

[0068] Specifically, the software part is mainly composed of the following two parts: the host computer software, which is used for human-computer interaction, obtaining detection tasks, generating detection plans, issuing control commands and test messages, etc.; the front-end software, which is used for data interaction between the host computer software and the designated ports of each unit under test, and serves as a communication bridge between the host computer and the underlying hardware, providing bridging services for various parts of the detection equipment.

[0069] Specifically, the hardware of this device consists of the following parts: a programmable voltage source, a high-precision power supply device that can output precise voltage and current through programming, used to power the unit under test. A high-precision standard meter, a high-accuracy measurement and testing equipment, used to compare the cross-sampling results with the unit under test during the test process and calculate the error. An automatic crimping module, an automated unit that controls the connection of the strong and weak current terminals of the unit under test, used to reliably physically connect the unit under test with the table position test interface module. A station control module, an automated unit that controls the power on and off of the unit under test and the lighting of the corresponding status indicator light, used to power on and off the unit under test as required during the test process and indicate its current state. A power consumption detection module, an automated unit that tests the power consumption of the unit under test, used to measure the power consumption of the unit under test in the communication and non-communication states during the test process. A test interface module, an automated unit that connects all interfaces of the unit under test to the table, used to connect all physical interfaces of the unit under test to the table to form a reliable communication link during the test process.

[0070] Preferably, the functional test includes: functional test, data transmission test and stability test; wherein,

[0071] The functional test categories include: flexible adjustment test, parameter setting and query test, downlink monitoring test, event recording and reporting test, protocol conversion test, initialization test, voltage basic error measurement, clock call test and synchronization, data and clock retention test, local function test, software upgrade test and protocol consistency test;

[0072] The data transmission test category includes: data transmission performance test, symmetric key update test, power supply impact test and power consumption test;

[0073] The stability test category includes: continuous power-on stability test.

[0074] Preferably, when conducting a basic voltage error test, a programmable voltage source provides test power to the standard meter and each distributed power access unit to be tested, and the front-end machine obtains the sampling values ​​of the distributed power access unit to be tested and the standard meter through RS485 communication, and forwards them to the host computer through the UDP protocol. The host computer calculates the error and determines whether the requirements are met.

[0075] Preferably, when conducting downlink detection tests and protocol conversion tests, the downlink device used is a virtual device, namely a virtual inverter. During the test, the front-end machine serves as a transit platform to connect the host computer, the distributed power access unit to be tested and the virtual inverter in series.

[0076] In the present invention, during the test, the unit to be tested is manually mounted on the table, and by pressing the "automatic crimping" button, the automatic crimping module will automatically connect the strong and weak current terminals of the unit to be tested with the test interface module, and then by selecting a suitable test scheme on the host computer interface and clicking "Start Test", the test process can be started with one click. The host computer controls the programmable voltage source to output voltage and current of different specifications according to the test scheme, and communicates with the unit to be tested through the front-end software and the corresponding test interface module, and then determines whether the unit to be tested meets the test requirements based on the data returned by the unit to be tested. After all the test items are completed, the host computer software controls the programmable voltage source to power off, and automatically uploads the test results to the specified location.

[0077] Combination Figure 4 As shown, the detection equipment involved in the present invention can detect 18 detection schemes online, which are divided into three categories, namely 12 functional tests, 5 data transmission tests, and 1 stability test. Among them, the functional test category includes: flexible adjustment test, parameter setting and query test, downlink monitoring test, event recording and reporting test, protocol conversion test, initialization test, voltage basic error measurement, clock call test and synchronization, data and clock retention test, local function test, software upgrade test and protocol consistency test; the data transmission test category includes: data transmission performance test, update symmetric key test, power supply impact test and power consumption test; the stability test category includes: continuous power-on stability test.

[0078] Combination Figure 5 As shown in the figure, during the voltage basic error test, the program-controlled voltage source provides test power to the standard meter and each unit under test. The front-end software obtains the sampling values ​​of the unit under test and the standard meter through RS485 communication, and forwards them to the host computer through the UDP protocol. The host computer calculates the error according to the technical specifications and determines whether it meets the requirements.

[0079] Combination Figure 6 As shown, during the general functional tests (including flexible adjustment test, parameter setting and query test, power-off data and clock retention test, local function test, protocol conversion test, flexible adjustment test, initialization test, and software upgrade test) of the testing equipment involved, the programmable voltage source provides power to the unit under test. After the control command is issued by the host computer software, the front-end computer forwards the command to the designated port of each unit under test and feeds back the result to the host computer. The host computer determines whether the test requirements are met based on the test requirements.

[0080] Combination Figure 7 As shown, during the communication transmission function test (data transmission test, data transmission performance test, downlink link monitoring test, event recording and reporting test, communication protocol consistency test) of the detection equipment involved in the present invention, the programmable voltage source provides power for the unit under test and the CCO module, and the upper computer software simulates the acquisition terminal to carry out the uplink data acquisition and transmission test of the device under test. At the same time, the upper computer software simulates the photovoltaic inverter to carry out the downlink data transmission test of the device under test to test whether the unit under test meets the data transmission test requirements.

[0081] Combination Figure 8 As shown, during the power supply impact test of the detection equipment involved in the present invention, the programmable voltage source provides power input for the unit under test, and the upper computer software controls the programmable voltage source to output the corresponding voltage (the limit value of the voltage change specified by the unit under test) through the front-end machine. After waiting for a period of time (about 60 seconds), the upper computer communicates with the unit under test to test whether the unit under test meets the requirements.

[0082] Combination Fig. 9 As shown, during the power consumption test of the detection equipment involved in the present invention, the programmable voltage source provides power input to the unit under test through the power consumption test module. After the unit under test is equipped with a dual-mode module, the upper computer software controls the power consumption test module through the front-end computer software to test whether the power consumption of the unit under test in the non-communication state and the communication state meets the requirements.

[0083] One of the key points of the equipment of the present invention is that when the distributed power access unit is tested, the automatic crimping of the unit to be tested can be realized. The specific implementation process is that the unit to be tested is first placed manually on the table position card seat, and then the "automatic crimping" button is pressed. The detection device controls the electric cylinder action of the automatic crimping module to connect the terminal of the unit to be tested with the test interface module, and then the test is started through the human-machine interface of the host computer. This method not only realizes the automatic connection of the unit to be tested, but also reduces the operator's work intensity and improves the detection efficiency. Another key point is that when the unit to be tested is tested for downlink detection test and protocol conversion test, the downlink device (photovoltaic inverter) uses a virtual device (virtual inverter). During the test, the front-end software is used as a transfer platform to connect the host computer software, the unit to be tested and the virtual inverter in series, so as to achieve the purpose of the test. Through the introduction and use of the virtual inverter, the hardware cost is greatly reduced, the structure becomes simple and reliable, and the maintenance difficulty of the detection equipment is reduced. In summary, the detection equipment of the present invention covers 18 detection items, including 12 functional tests, 5 communication tests, and 1 continuous power-on stability test, and can realize automatic connection, one-key detection, and automatic completion, thereby reducing work intensity and improving work efficiency.

[0084] Fig.10 FIG. 1 is a flow chart of a method 1000 for detecting a function of a distributed power supply access unit according to an embodiment of the present invention. Fig.10 As shown, the functional detection method 1000 of the functional detection device based on the distributed power supply access unit as described above provided in an embodiment of the present invention starts from step 1001. In step 1001, a host computer is used for human-computer interaction to obtain a detection task, and a control command and a test message are issued based on the detection task.

[0085] In step 1002, the front-end processor is used to forward data between the host computer and the voltage control source, the standard meter and the test table, providing a bridge service for data interaction.

[0086] In step 1003, the program-controlled voltage source supplies power to or cuts off power to the distributed power access unit to be tested according to the power control instruction of the host computer.

[0087] In step 1004, the test station performs a functional test on the distributed power supply access unit to be tested based on the test message.

[0088] Preferably, the method further comprises:

[0089] Use the automatic crimping module in the test table to physically connect the distributed power access unit to be tested with the table test interface module;

[0090] Using the station control module in the test table, during the test process, the distributed power access unit to be tested is powered on and off as required, and its current status is indicated;

[0091] The power consumption of the distributed power access unit to be tested in the communication and non-communication states is measured by using the power consumption detection module in the test table during the test process;

[0092] By using the test interface module in the test table, during the test process, all physical interfaces of the distributed power access unit to be tested are connected to the table to form a communication link.

[0093] Preferably, the functional test includes: functional test, data transmission test and stability test; wherein,

[0094] The functional test categories include: flexible adjustment test, parameter setting and query test, downlink monitoring test, event recording and reporting test, protocol conversion test, initialization test, voltage basic error measurement, clock call test and synchronization, data and clock retention test, local function test, software upgrade test and protocol consistency test;

[0095] The data transmission test category includes: data transmission performance test, symmetric key update test, power supply impact test and power consumption test;

[0096] The stability test category includes: continuous power-on stability test.

[0097] Preferably, the method further comprises:

[0098] When conducting the basic voltage error test, the programmable voltage source provides test power to the standard meter and each distributed power access unit to be tested. The front-end machine obtains the sampling values ​​of the distributed power access unit to be tested and the standard meter through RS485 communication, and forwards them to the host computer through the UDP protocol. The host computer calculates the error and determines whether it meets the requirements.

[0099] Preferably, the method further comprises:

[0100] When conducting downlink detection tests and protocol conversion tests, the downlink device uses a virtual method, which is a virtual inverter. During the test, the front-end machine serves as a transfer platform to connect the host computer, the distributed power access unit to be tested, and the virtual inverter in series.

[0101] In step 1005, the standard table is compared with the sampling result of the distributed power access unit to be tested during the test process to calculate the error.

[0102] The function detection method 1000 of the distributed power access unit of the embodiment of the present invention corresponds to the function detection device 100 of the distributed power access unit of another embodiment of the present invention, which will not be described in detail here.

[0103] The invention has been described above with reference to a few embodiments. However, it is readily apparent to a person skilled in the art that other embodiments than the ones disclosed above are equally within the scope of the invention, as defined by the appended patent claims.

[0104] Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise therein. All references to "a / said / the [means, components, etc.]" are to be openly interpreted as at least one instance of said means, components, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not necessarily have to be performed in the exact order disclosed, unless explicitly stated otherwise.

[0105] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented 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.

[0106] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0107] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0108] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does 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 function detection device for a distributed power supply access unit, characterized in that: The equipment includes: a host computer, a front-end computer, a programmable voltage source, a standard meter and at least one test table; The host computer is used for human-computer interaction and obtaining detection tasks, and issuing control commands and test messages based on the detection tasks; The front-end is connected to the host computer, the program-controlled voltage source, the standard meter and the test table respectively, and is used to realize the forwarding of data between the host computer and the program-controlled voltage source, the standard meter and the test table, and provide a bridge service for data interaction; The program-controlled voltage source is used to supply power or cut off power to the distributed power access unit to be tested according to the power control instruction of the host computer; The standard table is used to compare with the cross-collection results of the distributed power access unit to be tested during the test process to calculate the error; The test table is connected to the distributed power access unit to be tested, and is used to perform a functional test on the distributed power access unit to be tested based on the test message.

2. The device according to claim 1, characterized in that The test table comprises: an automatic crimping module, a station control module, a power consumption detection module and a test interface module; wherein, The automatic crimping module is used to physically connect the distributed power access unit to be tested with the table test interface module; The station control module is used to power on and off the distributed power access unit to be tested as required during the test process, and indicate its current status; The power consumption detection module is used to measure the power consumption of the distributed power access unit to be tested in the communication and non-communication states during the test process; The test interface module is used to connect all physical interfaces of the distributed power access unit to be tested to the test table to form a communication link during the test process.

3. The device according to claim 1, characterized in that The functional tests include: functional test, data transmission test and stability test; among which, The functional test categories include: flexible adjustment test, parameter setting and query test, downlink monitoring test, event recording and reporting test, protocol conversion test, initialization test, voltage basic error measurement, clock call test and synchronization, data and clock retention test, local function test, software upgrade test and protocol consistency test; The data transmission test category includes: data transmission performance test, symmetric key update test, power supply impact test and power consumption test; The stability test category includes: continuous power-on stability test.

4. The device according to claim 3, characterized in that When conducting the basic voltage error test, the programmable voltage source provides test power to the standard meter and each distributed power access unit to be tested. The front-end machine obtains the sampling values ​​of the distributed power access unit to be tested and the standard meter through RS485 communication, and forwards them to the host computer through the UDP protocol. The host computer calculates the error and determines whether it meets the requirements.

5. The device according to claim 3, characterized in that When conducting downlink detection tests and protocol conversion tests, the downlink device used is a virtual device, namely a virtual inverter. During the test, the front-end machine serves as a transfer platform to connect the host computer, the distributed power access unit to be tested and the virtual inverter in series.

6. A function detection method based on the function detection device of the distributed power access unit according to any one of claims 1 to 5, characterized in that: The method comprises: Use the host computer for human-computer interaction, obtain detection tasks, and issue control commands and test messages based on the detection tasks; The front-end is used to forward data between the host computer and the voltage control source, standard meter and test table, providing bridge service for data interaction; The program-controlled voltage source supplies power or cuts off power to the distributed power access unit to be tested according to the power control instruction of the host computer; The test table performs a functional test on the distributed power access unit to be tested based on the test message; During the test, the standard table is compared with the sampling results of the distributed power access unit to be tested to calculate the error.

7. The method according to claim 6, characterized in that The method further comprises: Use the automatic crimping module in the test table to physically connect the distributed power access unit to be tested with the table test interface module; Using the station control module in the test table, during the test process, the distributed power access unit to be tested is powered on and off as required, and its current status is indicated; The power consumption of the distributed power access unit to be tested in the communication and non-communication states is measured by using the power consumption detection module in the test table during the test process; By using the test interface module in the test table, during the test process, all physical interfaces of the distributed power access unit to be tested are connected to the table to form a communication link.

8. The method according to claim 6, characterized in that The functional tests include: functional test, data transmission test and stability test; among which, The functional test categories include: flexible adjustment test, parameter setting and query test, downlink monitoring test, event recording and reporting test, protocol conversion test, initialization test, voltage basic error measurement, clock call test and synchronization, data and clock retention test, local function test, software upgrade test and protocol consistency test; The data transmission test category includes: data transmission performance test, symmetric key update test, power supply impact test and power consumption test; The stability test category includes: continuous power-on stability test.

9. The method according to claim 8, characterized in that The method further comprises: When conducting the basic voltage error test, the programmable voltage source provides test power to the standard meter and each distributed power access unit to be tested. The front-end machine obtains the sampling values ​​of the distributed power access unit to be tested and the standard meter through RS485 communication, and forwards them to the host computer through the UDP protocol. The host computer calculates the error and determines whether it meets the requirements.

10. The method according to claim 8, characterized in that The method further comprises: When conducting downlink detection tests and protocol conversion tests, the downlink device uses a virtual method, which is a virtual inverter. During the test, the front-end machine serves as a transfer platform to connect the host computer, the distributed power access unit to be tested, and the virtual inverter in series.

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