A micro-collective metering equipment testing device and method

Abstract

The present invention relates to a micro-collective metering device testing device and method. The testing device includes: a host computer for controlling the operation of a program-controlled source, executing test software to test the device under test, and communicating with the device under test; a power supply module for providing power to the host computer and the program-controlled source; the program-controlled source is an industrial power supply controlled by the host computer and electrically connected to a meter rack module via a standard meter to power the device under test on the meter rack module; the standard meter is used to provide standard data for testing the testing device; the meter rack module includes a micro-collective metering device mounting bracket for mounting the micro-collective metering device, an analog metering module interface for connecting an analog metering module, and a micro-collective metering device management module; and a host computer communication module including a communication interface for communicating between the host computer and the micro-collective metering device, the analog metering module, and the micro-collective metering device management module. The testing device and method have comprehensive testing functions and high testing efficiency.

Description

Technical Field

[0001] The present invention relates to the field of measuring equipment testing, and in particular to a micro-collective measuring equipment testing device and method. Background Art

[0002] Micro-collective metering equipment is a new type of metering equipment that integrates functions such as electricity meter, intelligent micro-circuit breaker, photovoltaic switch, etc. The current test device is only for electricity meter or intelligent micro-circuit breaker, and cannot cover all functional tests of micro-collective metering equipment.

[0003] The patent application number 202210498500.7 proposes a system and method for full performance testing of measurement units. By setting up test units such as an energy acquisition and metering function test unit, a hardware interface test unit, a characteristic current communication test unit, a remote meter reading function test unit, a switch remote control and telesignaling test unit, and a switch terminal temperature measurement test unit, it realizes independent testing of various functions of the measurement unit on the same system. It is not restricted by circuit breaker switch bodies from different manufacturers, and has the characteristics of plug-and-play testing of measurement units. After the test is completed, the test results of various functional items are formed, and the interchangeability and compatibility of measurement units from different manufacturers can be evaluated, which can greatly improve the efficiency of detection work and greatly save detection costs. However, the existing technology has the following shortcomings: 1. The existing technology is a system and method for full performance testing of measurement units, and the targeted testing of multiple product functions of new metering equipment is not comprehensive: such as the main functions of miniature circuit breakers and photovoltaic switches; 2. The existing technology is mostly for whole-machine testing, and there is no testing solution for micro-collective metering equipment with a dual-core solution of metering pole + management module control pole + switch pole combination; 3. Conventional testing solutions require actual injection voltage and current for metering, and if functional tests such as daily freezing are required, the cycle is relatively long; there is no solution for functional verification of the management module control switch pole. Summary of the Invention

[0004] The object of the present invention is to provide a micro-collective metering equipment testing device and method, which have comprehensive testing functions and high testing efficiency.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a micro-collective metering equipment testing device, comprising:

[0006] The host computer is used to control the operation of the program-controlled source, execute the test software to test the device under test, and communicate with the device under test;

[0007] Power supply module, used to provide power for the host computer and program control source;

[0008] The program-controlled source is an industrial power supply controlled by a host computer, which is electrically connected to the hanging meter rack module via a standard meter and is used to power the device under test on the hanging meter rack module;

[0009] Standard table, used to provide standard data for testing the test device;

[0010] A meter rack module, comprising a micro-collective metering device mounting rack for mounting a micro-collective metering device, an analog metering module interface for connecting an analog metering module, and a micro-collective metering device management module; and

[0011] The host computer communication module includes a communication interface for the host computer to communicate with the micro-collective metering device, the analog metering module, and the management module of the micro-collective metering device.

[0012] Furthermore, the host computer communicates with the micro-collective metering device through a UART-485 communication interface; the host computer communicates with the analog metering module through a UART communication interface; the host computer communicates with the management module of the micro-collective metering device through a UART-485 communication interface; and the analog metering module communicates with the management module of the micro-collective metering device using SPI.

[0013] Furthermore, the wall meter rack module also includes a leakage test module for simulating and a temperature control instrument for simulating abnormal temperature of the terminal seat.

[0014] Furthermore, the testing device tests the entire micro-collective metering device, including the electric energy meter function test, the photovoltaic switch function test and the intelligent miniature circuit breaker function test.

[0015] Furthermore, the electric energy meter function test includes conventional function test and terminal seat temperature monitoring, the photovoltaic switch function test includes anti-islanding protection function test and photovoltaic grid-connected control function test, and the intelligent miniature circuit breaker function test includes leakage protection function test and short-circuit protection function test.

[0016] Furthermore, the testing device performs a test on the switch pole control function of the micro-collective metering equipment management module, simulates the metering module function, directly writes metering data, terminal block temperature monitoring data, residual current simulation measurement data, simulated overvoltage, undervoltage, overfrequency, underfrequency measurement data, simulated incoming line voltage data, outgoing line voltage data, and tests the reliability of the management module and the switch pole function.

[0017] The present invention also provides a method for testing a micro-collective metering device based on the above-mentioned testing device, and the entire micro-collective metering device is tested according to the following method:

[0018] A1) Insert the micro-collective measuring device to be measured;

[0019] A2) Power on the test device and start the host computer;

[0020] A3) Set the parameters of the test software in the host computer, including the address of the device under test and serial port communication parameters;

[0021] A4) Select the corresponding test item and run the test process:

[0022] A4.1) Electric energy meter measurement function test: The host computer controls the program-controlled power source and standard meter to output standard voltage and current. Conventional digital test: The host computer controls the program-controlled power source and standard meter to output voltage and current signals for sampling and measurement by the device under test. The test software reads the data collected by the micro-collective metering device, compares the read data with the standard meter data, and calculates the error. If the measurement accuracy requirements are met, the measurement accuracy of the device under test is qualified; otherwise, it fails.

[0023] A4.2) Electricity meter terminal block temperature monitoring function test: The host computer controls the temperature controller to control the terminal temperature on the meter holder to 80~160℃. If the terminal is overheated, the micro-collective metering device is tested to see if it is tripped. The terminal block temperature monitoring data is read to see if it meets the requirement of ≤±20℃. If it meets the requirement, it is qualified; otherwise, it fails.

[0024] A4.3) Photovoltaic switch: Anti-islanding protection test: The host computer controls the programmable power source to output a swing voltage between 0.1 and 0.9Un, or a swing frequency between 0.5 and 25Hz, simulating an islanding state. The micro-collective metering equipment determines whether it correctly judges and opens the switch. If it meets the requirements, it passes; otherwise, it fails.

[0025] A4.4) Photovoltaic switch: Photovoltaic grid-connected control test; When the micro-collective metering device is in the open state, control the input voltage of the micro-collective metering device to 220V at the line end and the output voltage to 220V. The host computer sends a closing command to test whether the micro-collective metering device is closed. If closed, it fails; if it does not operate, it passes. When the micro-collective metering device is in the open state, control the input voltage of the micro-collective metering device to 220V at the line end and the output voltage to 0V. The host computer sends a closing command to test whether the micro-collective metering device is closed. If closed, it passes; if it does not operate, it fails.

[0026] A4.5) Miniature circuit breaker: Leakage protection test: The host computer controls the leakage test device, injects 50mA leakage current, and the micro-collective metering device determines whether it is correct and opens the circuit breaker. If it meets the requirements, it passes; otherwise, it fails.

[0027] A4.6) Miniature circuit breaker: Short-circuit protection test; The host computer controls the program-controlled source to output 5 In to test whether the micro-collective metering device trips and whether the operating time is ≥0.1s. If so, it passes; otherwise, it fails. The host computer controls the program-controlled source to output 10 In to test whether the micro-collective metering device trips and whether the operating time is <0.1s. If so, it passes; otherwise, it fails.

[0028] A5) Read the test data of micro-collective metering equipment;

[0029] A6) Compare the data input from the test device with the preset test requirements to determine whether it is qualified;

[0030] A7) The test process is stored and displayed, and the test is completed.

[0031] Furthermore, the control capability of the micro-collective metering equipment management module and the extremely reliable operation of the switch are tested as follows:

[0032] B1) Insert the micro-collective measuring device to be measured;

[0033] B2) Power on the test device and start the host computer;

[0034] B3) Initialization of analog metering module, management module and switch pole;

[0035] B4) Set parameters in the test software in the host computer, including the address of the device under test and serial port communication parameters;

[0036] B5) Select the corresponding test item and run the test process:

[0037] B5.1) Analog metering module execution test: The host computer communicates with the analog metering module and writes the corresponding test data;

[0038] B5.2) The host computer issues a test command to the management module; the management module obtains data from the metering module;

[0039] B5.3) The analog metering module transmits the written data to the management module;

[0040] B6) The management module and the metering module exchange data;

[0041] B7) The management module makes judgments based on the data and controls the opening and closing of the switch poles;

[0042] B8) The switch pole performs opening and closing actions according to the control command of the management module;

[0043] B9) The host computer reads the test data of the micro-collective metering equipment;

[0044] B10) Compare the data input from the test device with the preset test requirements to determine whether it is qualified;

[0045] B11) The test process is stored and displayed, and the test is completed.

[0046] Compared with the prior art, the present invention has the following beneficial effects: providing a micro-collective metering equipment testing device and method, which supports testing of equipment such as intelligent miniature circuit breakers, intelligent electricity meters, photovoltaic switches, and residual current protectors, and can test power collection and metering function tests, hardware interface tests, characteristic current communication tests, remote meter reading function tests, switch remote control and telesignaling tests, switch terminal tests, as well as photovoltaic grid-connected control tests, anti-islanding protection function tests, leakage protection tests, etc.; the present invention can test the overall functions and performance of micro-collective metering equipment, simulate the functions of the metering module, and separately test the control capabilities of the management module and the execution capabilities of the switch. The testing function is comprehensive, which improves both test efficiency and test reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is a block diagram of the device implementation principle of an embodiment of the present invention;

[0048] Figure 2 is a schematic diagram of the test function of an embodiment of the present invention;

[0049] Figure 3 This is a flow chart of testing a complete micro-collective metering device according to an embodiment of the present invention;

[0050] Figure 4 This is a flow chart of testing the control capability of the micro-collective metering equipment management module and the extremely reliable operation of the switch in an embodiment of the present invention;

[0051] Figure 5 It is a block diagram of the implementation principle of the micro-collective metering device in an embodiment of the present invention. DETAILED DESCRIPTION

[0052] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0053] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0054] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0055] like Figure 1 As shown, this embodiment provides a micro-collective metering equipment testing device, including: a host computer, a power module, a program-controlled source, a standard meter, a meter rack module and a host computer communication module.

[0056] The host computer is used to control the operation of the program-controlled source, to execute the test software to test the device under test, and to communicate with the device under test.

[0057] The power supply module is used to provide power to the host computer and the program-controlled source, and input AC220V power to the host computer and the program-controlled source.

[0058] The program-controlled source is an industrial power supply controlled by a host computer, which is electrically connected to the hanging meter rack module via a standard meter and is used to power the device under test on the hanging meter rack module.

[0059] The standard table is a 0.2s-level high-precision standard table, which is used to provide standard data for testing the test device.

[0060] The meter rack module includes a micro-collective metering device mounting rack for mounting a micro-collective metering device, an analog metering module interface for connecting an analog metering module, and a micro-collective metering device management module.

[0061] The host computer communication module includes a communication interface for the host computer to communicate with the micro-collective metering device, the analog metering module, and the management module of the micro-collective metering device.

[0062] In this embodiment, the host computer communicates with the micro-collective metering device through the UART-485 communication interface 1; the host computer communicates with the analog metering module through the UART communication interface; the host computer communicates with the management module of the micro-collective metering device through the UART-485 communication interface 2; the analog metering module and the management module of the micro-collective metering device use SPI communication.

[0063] In this embodiment, the wall meter rack module further includes a leakage test module for simulating and a temperature control instrument for simulating abnormal temperature of the terminal block.

[0064] like Figure 2 As shown, the micro-collective metering equipment testing device provided in this embodiment can realize the following test functions:

[0065] 1. Test the entire micro-collective metering equipment. The test functions include electric energy meter function test (including routine function test and terminal block temperature monitoring), photovoltaic switch function test (including anti-islanding protection function test and photovoltaic grid-connected control function test), and intelligent miniature circuit breaker function test (including leakage protection function test and short-circuit protection function test).

[0066] 2. Test the switch pole control function of the micro-collective metering equipment management module, simulate the metering module function, write metering data or abnormal data through the host computer, without the actual operation of the metering module, to verify the processing capability of the management module.

[0067] This embodiment also provides a micro-collective metering device testing method based on the above-mentioned testing device. Figure 3 As shown, the whole micro-metering equipment is tested as follows:

[0068] A1) Insert the micrometer to be measured.

[0069] A2) Power on the test device and start the host computer.

[0070] A3) Set the parameters of the test software in the host computer, including the address of the device to be tested and the serial port communication parameters.

[0071] A4) Select the corresponding test item and run the test process.

[0072] A4.1) Electric energy meter metering function test: The host computer controls the program-controlled power source and standard meter through the serial port to output standard voltage and current. Conventional digital test: The host computer controls the program-controlled power source and standard meter to output voltage, current and other signals for sampling and measurement by the device under test. The data collected by the micro-collective metering device is read through the 485 communication interface 1. The test software compares the read data with the data on the standard meter and calculates the error. If the measurement accuracy requirements of the device are met, the measurement accuracy of the device under test is qualified; otherwise, it fails.

[0073] A4.2) Test of the temperature monitoring function of the electric energy meter terminal block: The upper computer controls the temperature controller to control the terminal temperature on the meter rack to 80~160℃. If the terminal is overheated, test whether the micro-collective metering equipment is disconnected. Read the terminal block temperature monitoring data through the 485 communication interface to see if it meets the requirement of ≤±20℃. If it meets the requirement, it is qualified, otherwise it fails.

[0074] A4.3) Photovoltaic switch: Anti-islanding protection test; the host computer controls the programmable power source to output a swing voltage between 0.1 and 0.9Un, or a swing frequency between 0.5 and 25Hz, to simulate an islanding state. The micro-collective metering equipment determines whether it correctly judges and opens the switch. If it meets the requirements, it passes; otherwise, it fails.

[0075] A4.4) Photovoltaic switch: Photovoltaic grid-connected control test (detect the voltage at the input and output terminals. When the metering device is in the off state, the photovoltaic inverter is prohibited from being energized and connected to the grid. Closing is allowed only when it is detected that the grid-side voltage and frequency are normal and there is no output voltage on the photovoltaic side); when the micro-collective metering device is in the off state, control the input voltage of the micro-collective metering device to 220V at the input terminal and 220V at the output terminal. The host computer sends a closing command to test whether the micro-collective metering device is closed. If it is closed, it is unqualified; if it does not operate, it is qualified; when the micro-collective metering device is in the off state, control the input voltage of the input terminal to 220V and 0V at the output terminal. The host computer sends a closing command to test whether the micro-collective metering device is closed. If it is closed, it is qualified; if it does not operate, it is unqualified.

[0076] A4.5) Miniature circuit breaker: Leakage protection test (the leakage protection value can be set between 50mA and 500mA (in 10mA steps), taking 50mA as an example); the host computer controls the leakage test device, injecting a 50mA leakage current. The micro-collective metering device determines whether it is correct and opens the circuit breaker. If it meets the requirements, it passes the test; otherwise, it fails the test.

[0077] A4.6) Miniature circuit breaker: short-circuit protection test (at 5 In, the tripping time should be no less than 0.1s; at 10 In, the tripping time should be less than 0.1s); the host computer controls the program-controlled source to output 5 In to test whether the micro-collective metering equipment trips and whether the action time is ≥0.1s. If so, it is qualified; otherwise, it fails. The host computer controls the program-controlled source to output 10 In to test whether the micro-collective metering equipment trips and whether the action time is <0.1s. If so, it is qualified; otherwise, it fails.

[0078] A5) Read the test data of the micro-metering equipment through the 485 communication interface.

[0079] A6) Compare the data input from the test device with the preset test requirements to determine whether it is qualified.

[0080] A7) The test process is stored and displayed, and the test is completed.

[0081] The micro-collective metering equipment management module tests the switch pole control function, including: simulating the metering module function, directly writing metering data, terminal block temperature monitoring data, residual current simulation measurement data, simulated overvoltage, undervoltage, overfrequency, underfrequency measurement data, simulated incoming line voltage data, outgoing line voltage data, and testing the reliability of the management module and switch pole functions.

[0082] like Figure 4 As shown, the control capability and switch reliability test of the micro-collective metering equipment management module are carried out as follows:

[0083] B1) Insert the micro-collective metering device (management module and switch pole) to be measured.

[0084] B2) Power on the test device and start the host computer.

[0085] B3) Initialization of analog metering module, management module and switch pole.

[0086] B4) Set the parameters of the test software in the host computer, including the address of the device to be tested and the serial port communication parameter settings.

[0087] B5) Select the corresponding test item and run the test process.

[0088] B5.1) Analog metering module execution test: The host computer communicates with the analog metering module through the UART port and writes the corresponding test data (voltage, current, frequency, power data, input and output line voltage data, input and output line terminal temperature data, residual current data, etc.).

[0089] B5.2) The host computer sends test commands to the management module through the UART-4852 port; the management module obtains data from the metering module through the SPI bus.

[0090] B5.3) The analog metering module transmits the written data to the management module via the SPI bus.

[0091] B6) The management module and the metering module exchange data via the SPI bus.

[0092] B7) The management module makes judgments based on the data and controls the opening and closing of the switch poles.

[0093] B8) The switch pole performs opening and closing actions according to the control command of the management module.

[0094] B9) The host computer reads the test data of the micro-collective metering equipment through the 485 communication interface.

[0095] B10) Compare the data input from the test device with the preset test requirements to determine whether it is qualified.

[0096] B11) The test process is stored and displayed, and the test is completed.

[0097] The implementation principle of the micro-collective metering device in this embodiment is as follows: Figure 5As shown. This micro-collective metering device includes a switch pole, a switch detection module, a power module, a metering and communication module, and a display and Bluetooth module. The switch pole is equipped with a current transformer and a leakage current transformer. The input end of the switch pole is connected to the 220V mains power and supplies power to the power module. The power module converts the alternating current into DC power and outputs direct current to the switch detection module and the metering and communication module. The metering and communication module is electrically connected to the current transformer and leakage current transformer on the switch pole to perform load current and leakage current sampling. The metering and communication module is electrically connected to the switch detection module to receive switch position detection signals and send opening and closing control signals. The metering and communication module is electrically connected to the display and Bluetooth module for data exchange.

[0098] The input end of the switch pole is connected to the 220V mains power, that is, connected to the L and N lines, and then supplies the power module; the power module performs AC / DC conversion and outputs 9V and 15V DC power, which respectively power the switch detection module, metering and communication module, and display and Bluetooth module.

[0099] The metering and communication module collects and monitors leakage current by collecting leakage current signals input by leakage current transformers on switch poles. The metering module samples load current by collecting load current signals input by current transformers on switch poles.

[0100] The switch detection module detects the rotation position of the switch pole gear and sends the switch position detection signal to the metering and communication module. The metering module sends the opening and closing control signal to the switch detection module based on the judgment of the switch status. The switch detection module realizes the opening and closing of the switch through the opening and closing transmission.

[0101] In this embodiment, the switch pole is also equipped with an operating mechanism, contacts, a protective device (trip), an arc extinguishing system, a terminal temperature measurement module, and an input and output voltage detection module. The metering and communication module is mainly composed of an MCU module, a storage module, an ESAM security module, an RS485 communication module, a weak current output interface, and an indicator light module. The display and Bluetooth module is mainly composed of a liquid crystal display module, a key module, and a Bluetooth communication module.

[0102] The switch detection module is equipped with a motor and drive circuit, a leakage tripping coil and drive circuit, and an opening and closing position detection circuit. The motor and drive circuit control the opening and closing motor's operation via a dedicated driver chip, ensuring output power and improving drive stability. The leakage tripping coil and drive circuit use a one-way thyristor to control the tripping coil's operating time. The opening and closing position detection circuit ensures the reliability of opening and closing by detecting the position of the opening and closing gears and the actual position of the shift lever.

[0103] The micro-collective metering device integrates functions such as energy metering, communication, temperature monitoring, control, remote protection setting, short-circuit protection, and reverse power online monitoring. It has a 4-terminal temperature measurement function and supports leakage detection and input and output line voltage detection. Its metering and switch control functions, as well as leakage protection functions, are suitable for residential electricity application scenarios. Its input and output line voltage detection and frequency detection and other anti-islanding protection functions can be applied to photovoltaic grid-connected application scenarios. Its metering and control functions can be applied to orderly power consumption scenarios of charging piles. 4-terminal temperature measurement, leakage current detection, reverse power online monitoring, input and output line voltage detection, short-circuit protection and other functions make the application of micro-collective metering equipment safer and more reliable.

[0104] The present invention provides a testing device and method for micro-collective metering equipment. These testing methods support two testing modes: complete micro-collective metering equipment testing and simulated metering module testing of the management module and switch terminals. By combining the test results from these two parts, both the operational reliability of the management module and switch terminals can be tested, as well as the metering module's metering accuracy. This method can simulate the metering module, writing metering data or abnormal data via a PC without actually operating the metering module, enabling targeted verification of the management module's processing capabilities. This method also offers a short testing cycle and improved testing efficiency. The present invention can simulate photovoltaic grid-connected conditions: by controlling the voltage at the input and output terminals of a programmable power source, the micro-collective metering device can be simulated in a photovoltaic grid-connected environment, effectively testing the monitoring and control capabilities of the management module and the switching capabilities. The present invention can also simulate photovoltaic islanding conditions: by controlling the output swing voltage and frequency of the programmable power source, the micro-collective metering device can be simulated in an islanding environment to test its anti-islanding protection function. The present invention can also simulate the output of a leakage current signal, enabling testing of the leakage protection function of the micro-collective metering device. Therefore, the present invention has comprehensive testing functions, which not only improves testing efficiency but also improves testing reliability.

[0105] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other manner. Any person skilled in the art may utilize the above-disclosed technical content to modify or modify the present invention into equivalent embodiments. However, any simple modifications, equivalent variations, and modifications to the above embodiments that do not depart from the technical content of the present invention and are based on the technical essence of the present invention remain within the scope of protection of the present invention.

Claims

1. A micro-collective metering equipment testing method, characterized in that: Provided is a micro-collective metering equipment testing device, comprising: The host computer is used to control the operation of the program-controlled source, execute the test software to test the device under test, and communicate with the device under test; Power supply module, used to provide power for the host computer and program control source; The program-controlled source is an industrial power supply controlled by a host computer, which is electrically connected to the hanging meter rack module via a standard meter and is used to power the device under test on the hanging meter rack module; Standard table, used to provide standard data for testing the test device; A meter rack module, comprising a micro-collective metering device mounting rack for mounting a micro-collective metering device, an analog metering module interface for connecting an analog metering module, and a micro-collective metering device management module; and The host computer communication module includes a communication interface for the host computer to communicate with the micro-collective metering device, the analog metering module, and the management module of the micro-collective metering device; Based on the test device, the whole micro-metering device is tested as follows: A1) Insert the micro-collective measuring device to be measured; A2) Power on the test device and start the host computer; A3) Set the parameters of the test software in the host computer, including the address of the device under test and serial port communication parameters; A4) Select the corresponding test item and run the test process: A4.1) Electric energy meter measurement function test: The host computer controls the program-controlled power source and standard meter to output standard voltage and current. Conventional digital test: The host computer controls the program-controlled power source and standard meter to output voltage and current signals for sampling and measurement by the device under test. The test software reads the data collected by the micro-collective metering device, compares the read data with the standard meter data, and calculates the error. If the measurement accuracy requirements are met, the measurement accuracy of the device under test is qualified; otherwise, it fails. A4.2) Electricity meter terminal block temperature monitoring function test: The host computer controls the temperature controller to control the terminal temperature on the meter holder to 80~160℃. If the terminal is overheated, the micro-collective metering device is tested to see if it is tripped. The terminal block temperature monitoring data is read to see if it meets the requirement of ≤±20℃. If it meets the requirement, it is qualified; otherwise, it fails. A4.3) Photovoltaic switch: Anti-islanding protection test: The host computer controls the programmable power source to output a swing voltage between 0.1 and 0.9Un, or a swing frequency between 0.5 and 25Hz, simulating an islanding state. The micro-collective metering equipment determines whether it correctly judges and opens the switch. If it meets the requirements, it passes; otherwise, it fails. A4.4) Photovoltaic switch: Photovoltaic grid-connected control test; When the micro-collective metering device is in the open state, control the input voltage of the micro-collective metering device to 220V at the line end and the output voltage to 220V. The host computer sends a closing command to test whether the micro-collective metering device is closed. If closed, it fails; if it does not operate, it passes. When the micro-collective metering device is in the open state, control the input voltage of the micro-collective metering device to 220V at the line end and the output voltage to 0V. The host computer sends a closing command to test whether the micro-collective metering device is closed. If closed, it passes; if it does not operate, it fails. A4.5) Miniature circuit breaker: Leakage protection test: The host computer controls the leakage test device, injects 50mA leakage current, and the micro-collective metering device determines whether it is correct and opens the circuit breaker. If it meets the requirements, it passes; otherwise, it fails. A4.6) Miniature circuit breaker: Short-circuit protection test; The host computer controls the program-controlled source to output 5 In to test whether the micro-collective metering device trips and whether the operating time is ≥ 0.1s. If so, it passes; otherwise, it fails. The host computer controls the program-controlled source to output 10 In to test whether the micro-collective metering device trips and whether the operating time is < 0.1s. If so, it passes; otherwise, it fails. A5) Read the test data of micro-collective metering equipment; A6) Compare the data input from the test device with the preset test requirements to determine whether it is qualified; A7) The test process is stored and displayed, and the test is completed.

2. A micro-collective metering equipment testing method according to claim 1, characterized in that: The host computer communicates with the micro-collective metering device through the UART-485 communication interface; the host computer communicates with the analog metering module through the UART communication interface; the host computer communicates with the management module of the micro-collective metering device through the UART-485 communication interface; the analog metering module and the management module of the micro-collective metering device use SPI communication.

3. A micro-collective metering equipment testing method according to claim 1, characterized in that: The hanging meter rack module also includes a leakage test module for simulating and a temperature control instrument for simulating abnormal temperature of the terminal seat.

4. A micro-collective metering equipment testing method according to claim 1, characterized in that: The testing device tests the entire micro-collective metering device, including the electric energy meter function test, the photovoltaic switch function test and the intelligent miniature circuit breaker function test.

5. A micro-collective metering equipment testing method according to claim 4, characterized in that: The electric energy meter function test includes conventional function test and terminal seat temperature monitoring, the photovoltaic switch function test includes anti-islanding protection function test and photovoltaic grid-connected control function test, and the intelligent miniature circuit breaker function test includes leakage protection function test and short-circuit protection function test.

6. A micro-collective metering equipment testing method according to claim 1, characterized in that: The testing device tests the switch pole control function of the micro-collective metering equipment management module, simulates the metering module function, directly writes metering data, terminal block temperature monitoring data, residual current simulation measurement data, simulated overvoltage, undervoltage, overfrequency, underfrequency measurement data, simulated incoming line voltage data, outgoing line voltage data, and tests the reliability of the management module and the switch pole function.

7. A micro-collective metering equipment testing method according to claim 1, characterized in that: The control capability and switch reliability test of the micro-collective metering equipment management module are carried out as follows: B1) Insert the micro-collective measuring device to be measured; B2) Power on the test device and start the host computer; B3) Initialization of analog metering module, management module and switch pole; B4) Set parameters in the test software in the host computer, including the address of the device under test and serial port communication parameters; B5) Select the corresponding test item and run the test process: B5.1) Analog metering module execution test: The host computer communicates with the analog metering module and writes the corresponding test data; B5.2) The host computer issues a test command to the management module; The management module obtains data from the metering module; B5.3) The analog metering module transmits the written data to the management module; B6) The management module and the metering module exchange data; B7) The management module makes judgments based on the data and controls the opening and closing of the switch poles; B8) The switch pole performs opening and closing actions according to the control command of the management module; B9) The host computer reads the test data of the micro-collective metering equipment; B10) Compare the data input from the test device with the preset test requirements to determine whether it is qualified; B11) The test process is stored and displayed, and the test is completed.

Images