Distributed power supply access unit

Abstract

The utility model relates to a distributed power supply access unit. The distributed power supply access unit comprises an upper computer, a front-end processor electrically connected with the upper computer and bottom hardware, the bottom hardware comprises a power supply cabinet and a plurality of test meter tables; a program-controlled voltage source and a standard meter electrically connected with the program-controlled voltage source are arranged in the power cabinet; an automatic crimping module, a station control module, a power consumption detection module and a test interface module are respectively and electrically connected in the test meter table; the station control module is electrically connected with the power consumption detection module, is electrically connected with the unit to be detected through a switch S1 and is electrically connected with the program control voltage source through a switch S2; the program control voltage source is electrically connected with the unit to be tested through a switch S3; the station control module controls the switch S1 and the switch S2, and the power consumption detection module controls the switch S3. The device is reasonable in design, compact in structure and convenient to use.

Description

Technical Field

[0001] This utility model relates to a distributed power supply access unit. Background Technology

[0002] In the past, the testing of distributed power access unit modules has been hampered by problems such as complicated wiring for manual testing, time-consuming and labor-intensive switching of communication ports, and low testing efficiency. The current solution is to use a structure similar to a test platform for testing, and to bring out all communication ports and use a host computer to switch between them. However, this method only solves the problem of time-consuming and labor-intensive switching of communication ports, and still suffers from complicated wiring and low efficiency.

[0003] In recent years, the cumulative installed capacity of distributed photovoltaic (PV) power has shown a rapid growth trend. To promote the healthy and orderly development of distributed PV and improve its management level, the State Grid Corporation of China has proposed the construction of "four capabilities": observable, controllable, measurable, and adjustable. The China Electric Power Research Institute has designed and developed a distributed power source access unit module for unified monitoring and control of distributed PV power.

[0004] However, at present, there is a lack of testing methods to fully verify the function and performance of distributed power access unit modules. Existing testing methods have drawbacks such as difficult wiring, low testing efficiency, and incomplete testing items, which are not conducive to quality control and application promotion.

[0005] Existing technology includes a detection device with a structure similar to that of a smart energy meter testing platform. However, this technical solution suffers from drawbacks such as laborious terminal insertion and low detection efficiency. Utility Model Content

[0006] In general, the technical problem this invention aims to solve is to provide a distributed power supply access unit. This invention's distributed power supply access unit testing device aims to address the aforementioned problem. The device employs a modular design for functional and performance testing of distributed power supply access units. It features automatic terminal crimping, automatic communication interface switching, high testing efficiency, and comprehensive testing capabilities, effectively supporting the national strategy for the healthy and orderly development of distributed photovoltaic power.

[0007] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0008] A distributed power access unit includes a host computer, a front-end computer electrically connected to the host computer, and underlying hardware;

[0009] The underlying hardware includes a power supply cabinet and several test platforms;

[0010] A standard table of programmable voltage sources and their electrical connections is installed in the power cabinet.

[0011] The test stand is electrically connected to an automatic crimping module, a workstation control module, a power consumption detection module, and a test interface module.

[0012] The workstation control module is electrically connected to the power consumption detection module via switch S1, and is electrically connected to the unit under test via switch S2;

[0013] The programmable voltage source is electrically connected to the unit under test via switch S3;

[0014] The workstation control module controls switches S1 and S2, and the power consumption detection module controls switch S3.

[0015] Furthermore, the host computer is used for human-computer interaction, acquiring detection tasks, generating detection plans, and issuing control commands and test messages;

[0016] The front-end unit includes an MCU and a network relay electrically connected to the downlink of the MCU; it is used for data interaction between the host computer and the designated ports of each unit under test, and serves as a communication bridge between the host computer and the underlying hardware;

[0017] The front-end electromechanical system is electrically connected to the test interface module via an automatic crimping module and a workstation control module; the test interface module is equipped with a power consumption detection module.

[0018] A programmable voltage source is used to power the unit under test;

[0019] The programmable voltage source is a power source;

[0020] The standard table is used to compare the results of cross-testing with the power supply under test and to calculate the error during the testing process;

[0021] The automatic crimping module is used to physically connect the unit under test to the position test interface module;

[0022] The workstation control module is used to power on and off the unit under test according to the set requirements and indicate its current status. The workstation control module includes status indicator lights.

[0023] The power consumption detection module is used to measure the power consumption of the unit under test in both communication and non-communication states during the testing process.

[0024] Furthermore, the test interface module is used to connect all physical interfaces of the unit under test to the communication link formed on the test panel during the test process; the test interface module includes an RJ45 socket, a communication socket, a power socket, and a crimp button.

[0025] Furthermore, a human-machine interface is installed on the platform;

[0026] The automatic crimping module includes a base, a probe base, and a crimping cylinder; the probe base is located on one side of the base, and the crimping cylinder is located on the base and connected to the probe base.

[0027] Furthermore, the workstation control module includes several relays; the relays are respectively installed on the voltage display unit, the meter power-on unit, and the switching power consumption detection unit; one of the relays is used to control the electric push rod; the relay is electrically connected to the press button.

[0028] Furthermore, the distributed power supply access unit also includes a main power supply circuit; the main power supply circuit includes circuit breakers QF1-QF4;

[0029] The mains power is connected to the corresponding circuit breakers QF2-QF4 through circuit breaker QF1. Circuit breaker QF1 also controls the human-machine interface circuit through the control coil of the panel emergency stop switch SB0 and relay KM1 connected in series.

[0030] Furthermore, the circuit breaker QF2 circuit is electrically connected to three switching power supplies T1-T3, which convert AC power to 24V, 12V, and 5V DC power respectively. Switching power supply T1 is electrically connected to the corresponding relay and indicator light, switching power supply T2 is electrically connected to the corresponding electric push rod, and switching power supply T3 is electrically connected to the power consumption board.

[0031] Furthermore, circuit breaker QF4 is connected to a standard meter and power source via the execution switch of relay KM1;

[0032] The output circuit of circuit breaker QF4 controls the opening and closing of the corresponding meter position circuit by controlling the contacts of relay KA101.

[0033] A standard meter is also connected in parallel in the power supply circuit of the meter position for comparison of reference values ​​when meter positions are exchanged.

[0034] The coil of the power supply relay KA101 is electrically connected to the output point OUT1 of the network relay module; the network relay receives signals from the host computer and outputs them.

[0035] A power consumption board is electrically connected to the corresponding tabletop interface module;

[0036] The gauge is electrically connected to the serial port server via an RS485 communication loop, and electrically connected to the specified interface of the unit under test module.

[0037] The automatic crimping module includes an electric push rod; the motor of the electric push rod is electrically connected to the corresponding relay contacts, and a 12V switching power supply passes through the relay contacts;

[0038] The network relay module controls the on / off state of the relay coil;

[0039] The crimp button SB of each position is connected to the corresponding input DI point of the network relay, and the host computer collects the status of the network relay.

[0040] The status indicator lights include parallel indicator lights P13 and P14, which are used for indication and display.

[0041] A distributed power source testing method, utilizing the aforementioned distributed power source access unit;

[0042] Step 1: Before the test begins, first, place the unit module under test into the socket. Then, press the crimp button to control the crimping cylinder. The probe holder installed on the crimping cylinder contacts the wiring terminals of the unit module under test, completing the automatic crimping.

[0043] Step 2: Start the power consumption detection module and switch to the test circuit according to the instructions of the host computer. The host computer sends instructions to the station control module, and the station control module controls switch S3 to open and switches S1 and S2 to close, so as to put the power consumption detection module into the power supply circuit.

[0044] Step 3: Conduct functional tests;

[0045] Step 4: During the test, the front-end processor acquires the sampled values ​​of the unit under test and the standard meter through RS485 communication and forwards them to the host computer via UDP protocol. The host computer calculates the error according to the technical specifications and determines whether the requirements are met.

[0046] Step four: After the test is completed, the host computer collects data from the power consumption detection module.

[0047] Furthermore, the functional tests include flexible adjustment tests, parameter setting and query tests, power failure data and clock retention tests, local function tests, protocol conversion tests, flexible adjustment tests, initialization tests, and host computer upgrade tests. In the tests, a programmable voltage source provides power to the unit under test. After the host computer sends control commands, the front-end computer forwards the commands to the designated ports of each unit under test and feeds back the results to the host computer. The host computer then determines whether the test requirements are met based on the test requirements.

[0048] Functional tests include data transmission functional tests; transmission functional tests include data transmission tests, data transmission performance tests, downlink monitoring tests, event logging and reporting tests, and communication protocol conformance tests.

[0049] During the communication transmission function test, the programmable voltage source provides power to the unit under test and the CCO module; the host computer simulates the acquisition terminal to carry out the uplink data acquisition and transmission test of the device under test, and the host computer 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;

[0050] During the power supply influence test, the programmable voltage source provides power input to the unit under test. The host computer controls the programmable voltage source to output the corresponding voltage through the front-end computer. After waiting for the set time, the host computer communicates with the unit under test to test whether the unit under test meets the requirements.

[0051] In the power consumption test principle, during the power consumption test, 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 host computer controls the power consumption test module through the front-end computer to test whether the power consumption of the unit under test meets the requirements in the non-communication state and the communication state.

[0052] The distributed power access unit testing device designed in this utility model not only realizes the automatic crimping function of the wiring terminals, reducing labor intensity and improving work efficiency; but also adopts a modular design, which is convenient for maintenance and upgrading; and in the testing process, the introduction and use of virtual devices such as virtual inverters and virtual circuit breakers significantly reduces hardware costs, makes the architecture simple and reliable, and facilitates expansion.

[0053] The detection device designed in this utility model has comprehensive detection items and high detection accuracy, which provides a guarantee for the reliable grid-connected operation of the distributed power supply access unit module and provides data support for future module upgrades.

[0054] This utility model is reasonably designed, low in cost, sturdy and durable, safe and reliable, simple to operate, time-saving and labor-saving, cost-saving, compact in structure and easy to use. Attached Figure Description

[0055] Figure 1 This is a schematic diagram of the structural composition of this utility model.

[0056] Figure 2 This is a schematic diagram of the appearance of the detection device of this utility model.

[0057] Figure 3 This is a schematic diagram of the automatic crimping module of this utility model.

[0058] Figure 4 This is a schematic diagram of the workstation control module of this utility model.

[0059] Figure 5 This is a schematic diagram illustrating the working principle of the power consumption detection module of this utility model.

[0060] Figure 6 This is a schematic diagram of the table interface module of this utility model.

[0061] Figure 7 This is a schematic diagram showing the classification of the detection items of this utility model.

[0062] Figure 8 This is a schematic diagram of the basic voltage error measurement test principle of this utility model.

[0063] Figure 9 This is a schematic diagram of the general functional test principle of this utility model.

[0064] Figure 10 This is a schematic diagram of the data transmission function test principle of this utility model.

[0065] Figure 11 This is a schematic diagram of the power supply influence test principle of this utility model.

[0066] Figure 12 This is a schematic diagram of the power consumption test principle of this utility model.

[0067] Figure 13 This is the electrical schematic diagram of the main power supply circuit of the device of this utility model.

[0068] Figure 14 This is the electrical schematic diagram of the power supply circuit for positions 1-10 of the device of this utility model.

[0069] Figure 15 This is the electrical schematic diagram of the power supply control circuit of this utility model (positions 1-9).

[0070] Figure 16 This is the electrical schematic diagram of the power consumption detection module of this utility model.

[0071] Figure 17 This is the RS485 wiring electrical schematic diagram of position 1 of this utility model.

[0072] Figure 18 This is the electrical schematic diagram of the automatic crimping motor for each position of this utility model.

[0073] Figure 19 This is the electrical schematic diagram of the automatic crimping relay for each meter position of this utility model.

[0074] Figure 20 This is the electrical schematic diagram of the automatic crimping button for each meter position of this utility model.

[0075] Figure 21 This is the electrical schematic diagram of the status indicator light of this utility model. Detailed Implementation

[0076] like Figure 1-21 This utility model designs a detection device for a distributed power access unit, as well as a computer host computer and electronic equipment, the architecture of which is shown in Figure (1).

[0077] Among them, it includes

[0078] The host computer is used for human-computer interaction, acquiring detection tasks, generating detection plans, issuing control commands and test messages, etc.

[0079] The front-end processor is used for data interaction between the host computer 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 testing device.

[0080] The hardware component includes a power supply cabinet and a test stand, which consists of the following six parts:

[0081] 1) 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, conventional batteries and their matching voltage regulator circuits, etc.

[0082] 2) High-precision standard meter, a high-accuracy measurement and testing device, is an externally purchased standard component used to compare the results of cross-samples with the power supply under test during the testing process and calculate the error.

[0083] 3) Automatic crimping module, such as Figure 19 As shown, an automated unit for controlling the connection of strong and weak current terminals of a unit under test includes a relay for reliably connecting the unit under test to the metering test interface module.

[0084] 4) Workstation control module, such as Figure 21 An automated unit for controlling the power-on and power-off of a unit under test (UTP) and the illumination of corresponding status indicator lights, used to power on and power off the UTP as needed during testing and to indicate its current status, including the illumination of status indicator lights.

[0085] 5) Power consumption detection module, such as Figure 16 An automated unit for testing the power consumption of a unit under test (UDT), used to measure the power consumption of the UDT in both communication and non-communication states during the testing process.

[0086] 6) Test interface module, an automated unit that connects all interfaces of the unit under test to the platform, used to connect all physical interfaces of the unit under test to the platform to form a reliable communication link during the test.

[0087] The appearance of the distributed power access unit detection device designed in this utility model is shown in Figure (2). In terms of appearance, it is mainly divided into the following three parts.

[0088] 1) Human-machine interface 2, i.e., interactive interface, during the test, the test plan and test parameters are selected on the human-machine interface. After the test is completed, the test results are fed back through the human-machine interface.

[0089] 2) Power cabinet 3. The power cabinet consists of a programmable voltage source and a high-precision standard meter. During testing, the host computer controls and reads the data.

[0090] 3) Test stand 1, which contains multiple test positions, each of which contains the following four functional modules;

[0091] a) Automatic crimping module. The structure of the automatic crimping module is shown in Figure (3). Its structure mainly consists of a base 4, a probe base 5, and a crimping cylinder 6. Before the test begins, first, the unit module to be tested is placed in the base. Then, the "crimp" button on the panel is pressed. The station control module controls the crimping cylinder to move. The probe base installed on the crimping cylinder makes close contact with the wiring terminals of the unit module to be tested, thus completing the automatic crimping.

[0092] b) Workstation control module. The composition of the workstation control module is shown in Figure (4).

[0093] This module consists of four units: an electric cylinder control unit, a voltage display unit, a meter power-on unit, and a switching power consumption detection unit. All four units are controlled by internal circuitry, executing corresponding actions upon receiving commands from the host computer and feeding back their current status.

[0094] c) Power consumption detection module. The working logic of the power consumption detection module is shown in Figure (5). The module is switched into the test circuit by the station control module according to the instructions of the host computer. In the power consumption detection stage, the host computer sends an instruction to the station control module. The station control module controls the switch S3 to open and S1 and S2 to close, so that the power consumption detection module is put into the power supply circuit. After the test is completed, the host computer collects the data of the power consumption detection module.

[0095] d) Test interface module, as shown in Figure (6), includes an RJ45 socket 7, a communication socket 8, a power socket 9, and a crimp button 10. This module provides various interfaces for gauge testing, providing the necessary communication and power connection paths for unit module testing.

[0096] 3. The distributed power access unit testing device designed in this utility model can test 18 items online, which are divided into three categories: 12 functional tests, 5 data transmission tests, and 1 stability test. The classification of testing items is shown in Figure (7).

[0097] 1) The basic voltage error test principle is shown in Figure (8). In the voltage error test, the programmable voltage source provides test power to the standard meter and each unit under test. The front-end computer obtains the sampled values ​​of the unit under test and the standard meter through RS485 communication and forwards them to the host computer through UDP protocol. The host computer calculates the error according to the technical specifications and judges whether the requirements are met.

[0098] 2) The general functional test principle is shown in Figure (9). During the general functional test (including flexible adjustment test, parameter setting and query test, power failure data and clock retention test, local function test, protocol conversion test, flexible adjustment test, initialization test, and host computer upgrade test) of the detection device designed in this utility model, the programmable voltage source provides power to the unit under test. After the host computer sends the control command, 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 judges whether the test requirements are met according to the test requirements.

[0099] 3) The principle of data transmission function test is shown in Figure (10). In the communication transmission function test (data transmission test, data transmission performance test, downlink monitoring test, event recording and reporting test, communication protocol consistency test) process, the programmable voltage source provides power to the unit under test and the CCO module. The host computer simulates the acquisition terminal to carry out the uplink data acquisition and transmission test of the device under test. At the same time, the host computer 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.

[0100] The principle of the power supply influence test is shown in Figure (11). In the power supply influence test, the programmable voltage source provides power input to the unit under test. The host computer controls the programmable voltage source to output the corresponding voltage (the limit value of voltage change specified by the unit under test) through the front-end computer. After waiting for a period of time (about 60 seconds), the host computer communicates with the unit under test to test whether the unit under test meets the requirements.

[0101] The power consumption test principle is shown in Figure (12). In the power consumption test, 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 host computer controls the power consumption test module through the front-end computer to test whether the power consumption of the unit under test meets the requirements in the non-communication state and the communication state.

[0102] The distributed power access unit detection device designed in this utility model is an electromechanical composite device. Its electrical core consists of the main power supply circuit, the meter position power supply circuit, the power consumption detection module, the automatic crimping module, etc. Its electrical schematic diagram is shown in Figure (13)-Figure (21).

[0103] 1) The electrical schematic diagram of the main power supply circuit of the device is shown in Figure (13). The main power supply is taken from the 220V AC mains. After the mains power is connected through the circuit breaker QF1, it is divided into three circuits to supply each functional circuit. Each circuit is disconnected by a circuit breaker, namely QF2-QF4. Among them, there are three switching power supplies under the QF2 circuit, which convert the AC power into 24V, 12V and 5V DC power respectively, which are used to drive different types of detection equipment.

[0104] 2) The power supply circuit principle of each meter position is shown in Figures (14) and (15). The power supply of each meter position comes from a power source and passes through the contacts of relays KA101 to KA112 in the power supply circuit. The opening and closing of the meter position circuit is controlled by controlling the opening and closing of the contacts of relays KA101 to KA112. At the same time, a standard meter is also connected in parallel in the power supply circuit of the meter position for comparison of the reference value of the meter position. Figure 14 Part of the table position is marked.

[0105] 3) The electrical schematic diagram of the power supply control circuit for each meter position is shown in Figure (15). The coils of the power supply relays KA101~KA112 for all meter positions are controlled by the output points OUT1~OUT12 of the network relay module. The network relays receive commands from the host computer and control the output of each DO (OUT), thereby achieving the effect of controlling the power supply of each meter position separately.

[0106] 4) The electrical schematic diagram of the device power consumption detection module is shown in Figure (17). Power consumption detection is achieved by connecting the power consumption board in series with the meter interface module to realize the purpose of power consumption detection in the voltage loop. At the same time, each meter position also has a voltmeter connected in parallel to the circuit of the power consumption board to display the current voltage value.

[0107] 5) The electrical schematic diagram of RS485 wiring of the device is shown in Figure (18). Here, only the wiring principle of the device 1 is shown. In the figure, the device 1 has 6 RS485 communication loops connected to the serial port server. In the communication loop, after conversion by the network cable to terminal module, the connection with the specified interface of the unit under test module is realized.

[0108] 6) The electrical schematic diagram of the automatic crimping function of each meter position is shown in Figure (19). The automatic crimping actuator of each meter position is mainly composed of electric push rods. The electric push rod motors M1 to M12 are powered by a 12V switching power supply through the contacts of relays KA1 to KA12. The on and off of the coils of relays KA1 to KA12 are controlled by the network relay module, which in turn causes the normally open / normally closed contacts of relays KA1 to KA12 to operate, further controlling the push rod motor to rotate forward or backward, thereby realizing the automatic crimping / re-cracking function.

[0109] 7) The electrical schematic diagram of the automatic crimping button of each meter position is shown in Figure (20). The crimping buttons SB1 to SB12 of each meter position are connected to the input DI point of the network relay. The host computer collects the status of the network relay to know whether the button is pressed and controls the corresponding output point DO to perform the action so that the automatic crimping function can operate normally.

[0110] The status indicator lights include parallel indicator lights P13 and P14, which are used for indication and display.

[0111] like Figure 15 , 19 20. Some table positions are omitted to make it easier to display the names of each component more clearly.

[0112] When testing a distributed power supply access unit, this utility model can automatically crimp the unit under test. The specific implementation process is as follows: first, the unit under test is manually placed on the meter mounting bracket, and then the "automatic crimping" button is pressed. The device controls the electric cylinder of the automatic crimping module to connect the terminals of the unit under test to the test interface module. 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 under test, but also reduces the workload of the operator and improves the testing efficiency.

[0113] In this invention, when conducting downlink testing and protocol conversion tests on the unit under test, the downlink device (photovoltaic inverter) uses a virtual device (virtual inverter). During the test, the front-end server acts as a relay platform, connecting the host computer, the unit under test, and the virtual inverter in series to achieve the testing objective. The introduction and use of the virtual inverter significantly reduces hardware costs, simplifies and simplifies the structure, and reduces the difficulty of device maintenance.

[0114] This utility model is described in detail for the purpose of making the disclosure clearer, and the prior art will not be listed one by one.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. It is obvious to those skilled in the art that multiple technical solutions of this utility model can be combined. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. All technical contents not described in detail in this utility model are publicly known technologies.

Claims

1. A distributed power supply access unit, characterized in that: This includes the host computer, the front-end processor electrically connected to the host computer, and the underlying hardware; The underlying hardware includes a power supply cabinet and several test platforms; A standard table of programmable voltage sources and their electrical connections is installed in the power cabinet. The test stand is electrically connected to an automatic crimping module, a workstation control module, a power consumption detection module, and a test interface module. The workstation control module is electrically connected to the power consumption detection module via switch S1, and is electrically connected to the unit under test via switch S2; The programmable voltage source is electrically connected to the unit under test via switch S3; The workstation control module controls switches S1 and S2, and the power consumption detection module controls switch S3.

2. The distributed power supply access unit according to claim 1, characterized in that: The host computer is used for human-computer interaction, acquiring detection tasks, generating detection plans, and issuing control commands and test messages.

3. The distributed power supply access unit according to claim 1, characterized in that: The front-end unit includes an MCU and a network relay electrically connected to the downlink of the MCU; it is used for data interaction between the host computer and the designated ports of each unit under test, and serves as a communication bridge between the host computer and the underlying hardware; The front-end electromechanical system is electrically connected to the test interface module via the automatic crimping module and the workstation control module. The test interface module is paired with a power consumption detection module.

4. The distributed power supply access unit according to claim 1, characterized in that: A programmable voltage source is used to power the unit under test; The standard table is used to compare the results of cross-testing with the power supply under test and to calculate the error during the testing process; The automatic crimping module is used to physically connect the unit under test to the position test interface module; The workstation control module is used to power on and off the unit under test according to the set requirements and indicate its current status. The workstation control module includes status indicator lights. The power consumption detection module is used to measure the power consumption of the unit under test in both communication and non-communication states during the testing process.

5. The distributed power supply access unit according to claim 4, characterized in that: The test interface module is used to connect all the physical interfaces of the unit under test to the communication link formed on the platform during the test process. The test interface module includes an RJ45 socket (7), a communication socket (8), a power socket (9), and a crimp button (10).

6. The distributed power supply access unit according to claim 5, characterized in that: A human-machine interface is set on the table (4).

7. The distributed power supply access unit according to claim 6, characterized in that: The workstation control module includes several relays; the relays are respectively installed on the voltage display unit, the meter power-on unit, and the switching power consumption detection unit; one of the relays is used to control the electric push rod; the relay is electrically connected to the press button.

8. The distributed power supply access unit according to claim 7, characterized in that: The distributed power supply access unit also includes a main power supply circuit; the main power supply circuit includes circuit breakers QF1-QF4; The mains power is connected to the corresponding circuit breakers QF2-QF4 through circuit breaker QF1. Circuit breaker QF1 also controls the human-machine interface circuit through the control coil of the panel emergency stop switch SB0 and relay KM1 connected in series.

9. The distributed power supply access unit according to claim 8, characterized in that: The automatic crimping module includes an electric push rod; the motor of the electric push rod is electrically connected to the corresponding relay contacts, and a 12V switching power supply passes through the relay contacts; The network relay module controls the on / off state of the relay coil; The crimp button SB of each position is connected to the corresponding input DI point of the network relay, and the host computer collects the status of the network relay. The status indicator lights include parallel indicator lights P13 and P14, which are used for indication and display.

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