Power distribution network working condition high-fidelity inversion system, test method, terminal and storage medium

Abstract

This invention discloses a high-fidelity inversion system, testing method, terminal, and storage medium for distribution network operating conditions. The high-fidelity inversion system includes a power supply unit, a clock synchronization unit, a central control unit, an industrial control computer unit, a test case input unit, an auxiliary input unit, and an input / output unit. The power supply unit provides power signals to the device under test; the clock synchronization unit synchronizes the system clock signal; and the central control unit is connected to the power supply unit and the clock synchronization unit for hardware parameter control. This invention uses the test case input unit and the auxiliary input unit to input test case sets and auxiliary test signals, respectively, to simulate different test scenarios, thereby achieving high-precision power source output. Combined with the requirements of distribution network operating condition inversion, it can adapt to the testing needs of various operating conditions of the distribution network.

Description

Technical Field

[0001] This invention relates to the field of power distribution network technology, and in particular to a high-fidelity inversion system, testing method, terminal and storage medium for power distribution network operating conditions. Background Technology

[0002] A power distribution network is a network that receives electrical energy from the transmission network or regional power plants and distributes it locally or in stages according to voltage to various users through distribution facilities. It consists of overhead lines, cables, poles, distribution transformers, disconnect switches, reactive power compensators, and some auxiliary facilities, and plays an important role in distributing electrical energy in the power grid.

[0003] Various tests are required for each device in the power distribution network during actual use. However, traditional testing methods are relatively simple and cannot meet the testing requirements of various operating conditions of the power distribution network. Therefore, a high-fidelity inversion system, testing method, terminal and storage medium for power distribution network operating conditions are proposed to solve this problem. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problem that the test methods in the above and / or existing systems and their test methods are relatively simple and cannot meet the test requirements of various operating conditions of power distribution networks, this invention is proposed.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a high-fidelity inversion system for power distribution network conditions, comprising a power supply unit, a clock synchronization unit, a central control unit, an industrial control computer unit, a test case input unit, an auxiliary input unit, and an input / output unit. The power supply unit provides power signals to the device under test (DUT). The clock synchronization unit synchronizes the system clock signal. The central control unit is connected to the power supply unit and the clock synchronization unit for hardware parameter control. The input terminal of the industrial control computer unit is connected to the central control unit, and the output terminal of the industrial control computer unit is connected to the DUT, for running stored test cases on the DUT and interacting during the test process to obtain test data. The test case input unit is connected to the central control unit for inputting test case sets. The auxiliary input unit is connected to the central control unit for outputting auxiliary test signals according to the power signals provided by the power supply unit. The input / output units are connected to the central control unit and the DUT respectively, for collecting and simulating the input / output quantities of the DUT.

[0007] In a preferred embodiment of the present invention, the power supply unit includes a lithium battery module, a voltage signal module, a current signal module, a voltage power amplifier module, a current power amplifier module, and a switching module. The lithium battery module is connected to the input terminal of the switching module. The input terminals of the voltage signal module and the current signal module are both connected to the output terminal of the switching module. The output terminal of the voltage signal module is connected to the voltage power amplifier module, and the output terminal of the current signal module is connected to the current power amplifier module.

[0008] In a preferred embodiment of the present invention, the power supply unit is further connected to a power supply testing unit for testing the battery parameters of the lithium battery module. The main control unit is used to obtain the battery parameter test results of the lithium battery module and control the auxiliary input unit to output different auxiliary test signals according to the battery parameter test results and the power signal provided by the lithium battery module. The main control unit is connected to an external interface unit.

[0009] In a preferred embodiment of the present invention, the clock synchronization unit includes a GPS timekeeping circuit module and a clock synchronization circuit module. The GPS timekeeping circuit module is used to receive external GPS signals, and the clock synchronization circuit module is connected to the GPS timekeeping circuit module. The clock synchronization circuit module is used to synchronize and calibrate the system clock according to the GPS signals.

[0010] As a preferred embodiment of the present invention, the auxiliary test signal input by the auxiliary input unit includes at least one of the following: remote control failure to operate, remote control slow operation, insufficient transfer capacity, PT disconnection, and CT disconnection.

[0011] As a preferred embodiment of the present invention, it further includes a telemetry unit connected to the device under test (DUT) and used to input telemetry signals to the DUT to test the DUT.

[0012] In a preferred embodiment of the present invention, the telemetry unit includes a comprehensive testing module, a telemetry testing module, a telemetry signaling testing module, a remote control testing module, and a playback module. The comprehensive testing module is used to test the hardware output or software simulation protocol communication status. The telemetry testing module is used to test the telemetry accuracy of the device under test. The telemetry signaling testing module is used to test at least one of telemetry signaling anti-shake time, telemetry signaling storm, and telemetry signaling avalanche response. The remote control testing module is used to test the remote control correctness and hold time of the device under test. The playback module is connected to the device under test and is used to export fault process data during the test to achieve fault playback.

[0013] A method for testing distribution network terminals includes a high-fidelity inversion system for distribution network operating conditions, and the following steps:

[0014] Acquire the target data of the device under test, and obtain the target state sequence based on the target data;

[0015] Based on the target state sequence, the test case set, auxiliary test signals, and power supply signals input into the high-fidelity inversion system of the distribution network operating conditions are configured;

[0016] Clock synchronization is performed through a clock synchronization unit, and then the industrial control computer unit tests the device under test and acquires test data.

[0017] The state of the device under test is verified based on the test data to determine whether the test results are correct.

[0018] The present invention provides a terminal including a memory and a processor. The memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the terminal performs the above-described power distribution terminal testing method.

[0019] As a preferred embodiment of the present invention, the telemetry unit 900's workflow includes the telemetry test module 902 outputting three-phase AC voltage and current signals.

[0020] The remote signaling test module 903 makes corresponding light changes based on the signal;

[0021] The remote control test module 904 is used to test the remote control execution functions of each channel of the terminal;

[0022] The playback module 905 is connected to the device under test and is used to export the fault process data during the test to realize fault playback;

[0023] The remote signaling test module 903 performs corresponding light changes based on the output signal of the remote telemetry test module 902, including...

[0024] When the output current is less than 0.5A, the remote signaling test module 903 displays a blue light, indicating that the remote signaling anti-shake time is less than 10ms;

[0025] When the output current is greater than 0.5A and less than 1A, the remote signaling test module 903 displays a yellow light, indicating that the remote signaling anti-shake time is less than 20ms and greater than 10ms.

[0026] When the output current stabilizes at 1A, the remote signaling test module 903 displays a green light, indicating that the remote signaling anti-jitter time is 20ms.

[0027] When the output current is greater than 1A, the remote signaling test module 903 displays a red light, which means it sends a warning fault reminder.

[0028] The beneficial effects of this invention are as follows: This invention provides power signals of different magnitudes required by the device under test through a power supply unit, and synchronizes the device under test and the system in this solution through a clock synchronization unit to improve the accuracy of test results. During the test, test case input unit and auxiliary input unit respectively input test case set auxiliary test signals to facilitate simulation testing of different test scenarios, thereby achieving high-precision power source output. Combined with the requirements of distribution network operating condition inversion, it can adapt to the test needs of various operating conditions of distribution network. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0030] Figure 1 This is a structural block diagram of the entire invention.

[0031] Figure 2 This is a structural block diagram of the power supply unit of the present invention.

[0032] Figure 3 , 4 This is a fault characteristic current curve of the present invention.

[0033] Figure 5 This is a flowchart of the power distribution network terminal testing method of the present invention. Detailed Implementation

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0037] Example 1

[0038] Reference Figure 1 This is the first embodiment of the present invention. This embodiment provides a high-fidelity inversion system for power distribution network operating conditions, including a power supply unit 100, a clock synchronization unit 200, a main control unit 300, an industrial control computer unit 400, a test case input unit 500, an auxiliary input unit 600, and an input / output unit 700.

[0039] The power supply unit 100 provides power signals to the device under test (DUT); the clock synchronization unit 200 synchronizes the system clock signal; the central control unit 300 is connected to the power supply unit 100 and the clock synchronization unit 200 for hardware parameter control; the input terminal of the industrial control computer unit 400 is connected to the central control unit 300, and the output terminal of the industrial control computer unit 400 is connected to the DUT, for running the stored test cases on the DUT and interacting during the test process to obtain test data; the test case input unit 500 is connected to the central control unit 300 for inputting test case sets; the auxiliary input unit 600 is connected to the central control unit 300 for outputting auxiliary test signals according to the power signal provided by the power supply unit 100; and the input / output units 700 are connected to the central control unit 300 and the DUT respectively, for acquiring and simulating the input / output quantities of the DUT.

[0040] The power supply unit 100 includes a voltage signal of 0-300V and a current signal of 020A. The power supply unit 100 adjusts the power parameters through the main control unit 300 to output a preset power signal to the device under test. At the same time, the main control unit 300 controls the test case input unit 500 and the auxiliary input unit 600 respectively, so that different test case sets and auxiliary test signals can be input through the test case input unit 500 and the auxiliary input unit 600 respectively, so as to simulate various working conditions of the device under test. This allows the industrial control computer unit 400 to adapt to the inversion test process of various working conditions of the power distribution network when testing the device under test.

[0041] The input / output unit 700 has a remote control simulation execution circuit, which can accept the control output of the power distribution terminal, simulate the action of the switch under test, simulate one or more circuit breakers, and can be defined as open, closed, or controlled open, and can be linked with voltage and current output. It can easily output relevant relay protection action simulation signals to meet the needs of field testing.

[0042] The telemetry unit 900's workflow includes:

[0043] The telemetry test module 902 outputs three-phase AC voltage and current signals;

[0044] The remote signaling test module 903 makes corresponding light changes based on the signal;

[0045] The remote control test module 904 is used to test the remote control execution functions of each channel of the terminal;

[0046] The playback module 905 is connected to the device under test and is used to export the fault process data during the test to realize fault playback;

[0047] The remote signaling test module 903 performs corresponding light changes based on the output signal of the remote telemetry test module 902, including...

[0048] When the output current is less than 0.5A, the remote signaling test module 903 displays a blue light, indicating that the remote signaling anti-shake time is less than 10ms;

[0049] When the output current is greater than 0.5A and less than 1A, the remote signaling test module 903 displays a yellow light, indicating that the remote signaling anti-shake time is less than 20ms and greater than 10ms.

[0050] When the output current stabilizes at 1A, the remote signaling test module 903 displays a green light, indicating that the remote signaling anti-jitter time is 20ms.

[0051] When the output current is greater than 1A, the remote signaling test module 903 displays a red light, which means it sends a warning fault reminder.

[0052] Example 2

[0053] Reference Figures 1-4 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0054] The power supply unit 100 includes a lithium battery module 101, a voltage signal module 102, a current signal module 103, a voltage power amplifier module 104, a current power amplifier module 105, and a switching module 106. The lithium battery module 101 is connected to the input terminal of the switching module 106. The input terminals of the voltage signal module 102 and the current signal module 103 are both connected to the output terminal of the switching module 106. The output terminal of the voltage signal module 102 is connected to the voltage power amplifier module 104, and the output terminal of the current signal module 103 is connected to the current power amplifier module 105.

[0055] During the input of power signals, the power supply unit 100 selects to input different voltage or current signals according to different needs. Specifically, it selects either the voltage signal module 102 or the current signal module 103 through the switching module 106 to output voltage or current signals. Then, according to the requirements of the main control unit 300, it amplifies the voltage signal through the voltage power amplifier module 104 or the current signal through the current power amplifier module 105 to obtain the voltage or current signal that meets the requirements of the main control unit 300.

[0056] The current signal module 102 has 4 channels. After being amplified by the current power amplifier module 105, the final output current signal has an AC current range of 0–20A / 80VA and a DC current range of 0–20A / 100W. The output accuracy of the AC current is ≤0.06% ±0.04%FS, and the output accuracy of the DC current is ≤0.6% ±0.4%FS. The output stability of the AC current is ≤0.03% ±0.02%FS, and the DC current is ≤0.3% ±0.2%FS. The output accuracy of the output current signal is ≤0.1%. For voltage signal output, the current signal module 103 has 4 channels. The output voltage signal ranges from 0 to 300V / 100VA for AC voltage and from 0 to 300V / 50W for DC voltage. The voltage output accuracy is ≤0.06% ±0.04%FS; the voltage output stability is ≤0.03% ±0.02%FS; and the voltage output precision is ≤0.1%.

[0057] The power supply unit 100 is also connected to a power supply test unit 107, which is used to test the battery parameters of the lithium battery module 101. The main control unit 300 is used to obtain the battery parameter test results of the lithium battery module 101, and control the auxiliary input unit 600 to output different auxiliary test signals according to the battery parameter test results and the power signal provided by the lithium battery module 101. The main control unit 300 is connected to an external interface unit 800.

[0058] The power supply unit 100 is used to perform battery parameter testing on the lithium battery module 101. The battery parameter testing includes one of the following: internal resistance, capacity, and aging degree. The power supply test unit 107 tests the lithium battery module 101 to obtain the internal voltage and internal resistance of the lithium battery module 101, and estimates the capacity of the lithium battery module through a short-time discharge curve. At the same time, it can also comprehensively evaluate the aging degree of the lithium battery module 101 based on various indicators. The power supply test unit 107 can obtain the parameters of the lithium battery module 101 in real time, including the current battery voltage, internal resistance, and aging degree, so as to output auxiliary test signals to assist based on the parameters of the lithium battery module 101 and the current output power signal of the lithium battery module 101, so as to ensure accurate output test signals, improve the accuracy of test results, and facilitate cooperation with the test case unit 500 to simulate different test environments.

[0059] The power supply unit 100 is also equipped with an auxiliary DC power output, which has a 24V / 48V switchable auxiliary DC voltage output, which can be used as a backup power supply when the device under test is without power.

[0060] The main control unit 300 is connected to an external interface unit 800 to provide a communication interface for communicating with an external computer device to realize at least one of the functions of firmware upgrade, parameter setting, and data import / export. After connecting to an external computer through the communication interface, the entire system can communicate with the external computer device to transmit data, thereby realizing functions such as firmware upgrade, parameter setting, section placement, and test result export. The communication interface includes a USB interface or an Ethernet interface.

[0061] The clock synchronization unit 200 includes a GPS timekeeping circuit module 201 and a clock synchronization circuit module 202. The GPS timekeeping circuit module 201 is used to receive external GPS signals. The clock synchronization circuit module 202 is connected to the GPS timekeeping circuit module 201 and is used to synchronize and calibrate the system clock according to the GPS signal.

[0062] The clock synchronization unit 200 provides a precise clock signal via GPS signal and also provides a time-holding function when there is no GPS signal to avoid system clock deviation. The GPS timekeeping circuit module 201 receives external GPS signals when field conditions permit and also ensures its own timekeeping when there is no GPS signal.

[0063] The main control unit 300 inputs control signals through a touch screen. In this embodiment, the touch screen is a 10.1-inch LCD screen with dot-capacitive touch and a resolution of 1280*800.

[0064] The auxiliary test signals input to the auxiliary input unit 600 include at least one of the following: remote control failure, remote control slow operation, insufficient transfer capacity, PT disconnection, and CT disconnection.

[0065] During the process of inputting auxiliary test signals into the auxiliary input unit 600, different auxiliary test signals are input in conjunction with different test case sets to simulate the test process under different working conditions.

[0066] During the test, the system can achieve closed-loop automatic testing with the power distribution terminal, automatically adjust the output voltage and current and input / output, and collect data from the device under test through the protocol to complete tests including voltage, current and power accuracy, remote signaling anti-jitter, SOE resolution, and remote control execution correctness. After the test starts, the entire test process no longer requires manual operation, and the test report is automatically generated upon completion, which improves the test efficiency.

[0067] It also includes a telemetry unit 900, which is connected to the device under test and is used to input telemetry signals to the device under test for testing.

[0068] The telemetry unit 900 includes a comprehensive test module 901, a telemetry test module 902, a remote signaling test module 903, a remote control test module 904, and a playback module 905. The comprehensive test module 901, through manual input of voltage and current and simultaneous monitoring of input changes, is used to test hardware outputs or software simulation of protocol communication status. The telemetry test module 902 outputs three-phase AC voltage and current signals, with adjustable amplitude, frequency, and phase. The output signal simulates the AC signal in the field and is provided to the device under test (DUT) to verify the telemetry accuracy of the DUT. The remote signaling test module 903 simulates the actions of the DUT in the field by sending switch signals. The test module 904 is used to test whether the remote signaling function of the device under test (DUT) is normal. It is used to test at least one of the following: remote signaling anti-shake time, remote signaling storm, and remote signaling avalanche response. The remote control test module 904 is used to test whether the remote control execution functions of each channel of the terminal are normal. It can test the remote control correctness and hold time of the DUT. The playback module 905 is connected to the DUT and is used to export the fault process data during the test to realize fault playback. After the DUT completes the test, the voltage and current channels are selected by importing the COMTRADE file, and the voltage data and ground current data of the DUT during the test are output to realize the fault playback function, so as to facilitate the analysis of the fault problem of the DUT.

[0069] The inversion system of this scheme provides 4 current and 4 voltage channels to simulate the current and voltage signals of one line. The amplitude, phase and frequency can be set.

[0070] Example 3

[0071] Reference Figure 5 This is the third embodiment of the present invention, which provides a distribution network terminal testing method using the high-fidelity distribution network operating condition inversion system in embodiments 1-2, and includes the following steps:

[0072] S101. Obtain the target data of the device under test, and obtain the target state sequence from the target data;

[0073] S102. Configure the test case set, auxiliary test signals and power signals input into the high-fidelity inversion system of distribution network operating conditions according to the target state sequence.

[0074] S103. The clock is synchronized through the clock synchronization unit, and then the test device is tested and the test data is acquired through the industrial control computer unit.

[0075] S104. Verify the status of the device under test based on the test data to determine whether the test results are correct.

[0076] Specifically, the target data of the device under test (DUT) is first determined, including voltage, current, and input / output quantities. Based on the target data, the target state sequence is determined, including the corresponding output order, hold time, and logic change sequence. Then, the test case input unit 5 is used to input the test case set, the auxiliary input unit 6 is used to input the auxiliary test signal, and the power supply unit 1 is used to configure the power signal. After configuration, the clock synchronization unit 2 is used for clock synchronization, and the industrial control computer unit 40 is used to start the test process to output test data. At the same time, during the test, the input / output units 7 collect and simulate the input / output quantities of the DUT to obtain complete test data of the DUT and complete the test process of the DUT.

[0077] Finally, based on the fault handling results corresponding to the test data, the fault handling of the device under test is performed according to the action logic of the power distribution terminal equipment to determine whether the device under test is normal. If it is normal, it means that the test results of the device under test are accurate.

[0078] Users customize the test process based on the model, setting the amplitude and hold time for each individual state. When the test starts, it switches to the next state once the hold time is reached. For example... Figure 3 , 4 The following figures (a) and (b) show the changes in current monitored by the FTU / DTU at the upstream and downstream switches of a line when a fault occurs at a certain point in the line. t1 is the fault time, t2 is the overcurrent protection activation time, t3 is the reclosing activation time, and t4 is the post-acceleration protection activation time. The feeder automation system (FA) uses the real-time current information collected by each FTU / DTU on the line, along with corresponding voltage, switch status, and other data, combined with the network topology, to detect the equipment under test.

[0079] The number of devices under test is multiple, and these devices are started at a set time for synchronous testing. By setting the start time, all devices under test and the high-fidelity inversion system for power distribution network conditions are set to start at the same agreed time to complete the synchronous testing of multiple devices under test.

[0080] A terminal includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program stored in the memory to enable the terminal to perform the power distribution terminal testing method of this embodiment.

[0081] A storage medium storing a computer program, which, when executed, implements the power distribution network terminal testing method of this embodiment.

[0082] The modules described above can be one or more integrated circuits configured to implement the methods described above, such as one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs). Alternatively, when a module is implemented using processing element scheduler code, the processing element can be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. Furthermore, these modules can be integrated together to form a system-on-a-chip (SoC).

[0083] The storage medium of this invention stores a computer program, which, when executed by a processor, implements the aforementioned power distribution network terminal testing method. The storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disk, USB flash drive, memory card, or optical disk.

[0084] Preferably, the processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0085] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A high-fidelity inversion system for distribution network operating conditions, characterized in that: include, Power supply unit (100) is used to provide power signals to the device under test; The clock synchronization unit (200) is used to synchronize the system clock signal; The main control unit (300) is connected to the power supply unit (100) and the clock synchronization unit (200) to control hardware parameters; An industrial control computer unit (400) has its input terminal connected to the main control unit (300) and its output terminal connected to the device under test. It is used to run the stored test program in the device under test and to perform interactive test processes to obtain test data. The test case input unit (500) is connected to the main control unit (300) and is used to input a test case set; An auxiliary input unit (600) is connected to the main control unit (300) and is used to output an auxiliary test signal according to the power signal provided by the power supply unit (100), wherein the auxiliary test signal includes at least one of the following: remote control failure, remote control slow operation, insufficient transfer capacity, PT disconnection, and CT disconnection. The input / output unit (700) is connected to the main control unit (300) and the device under test, respectively, and is used to collect and simulate the input / output quantities of the device under test; The power supply unit (100) is also connected to a power supply test unit (107) for testing the battery parameters of the lithium battery module (101). The main control unit (300) is used to obtain the battery parameter test results of the lithium battery module (101) and control the auxiliary input unit (600) to output different auxiliary test signals according to the battery parameter test results and the power signal provided by the lithium battery module (101). The main control unit (300) is connected to an external interface unit (800).

2. The power distribution network operating condition high fidelity inversion system of claim 1, wherein: The power supply unit (100) includes a lithium battery module (101), a voltage signal module (102), a current signal module (103), a voltage power amplifier module (104), a current power amplifier module (105), and a switching module (106). The lithium battery module (101) is connected to the input terminal of the switching module (106). The input terminals of the voltage signal module (102) and the current signal module (103) are both connected to the output terminal of the switching module (106). The output terminal of the voltage signal module (102) is connected to the voltage power amplifier module (104), and the output terminal of the current signal module (103) is connected to the current power amplifier module (105).

3. The power distribution network operating condition high fidelity inversion system of claim 2, wherein: The clock synchronization unit (200) includes a GPS timekeeping circuit module (201) and a clock synchronization circuit module (202). The GPS timekeeping circuit module (201) is used to receive external GPS signals. The clock synchronization circuit module (202) is connected to the GPS timekeeping circuit module (201) and is used to synchronize and calibrate the system clock according to the GPS signals.

4. The power distribution network operating condition high fidelity inversion system of claim 3, wherein: It also includes a telemetry unit (900), which is connected to the device under test and is used to input telemetry signals to the device under test to test the device under test.

5. The power distribution network operating condition high fidelity inversion system of claim 4, wherein: The telemetry unit (900) includes a comprehensive test module (901), a telemetry test module (902), a telemetry signaling test module (903), a remote control test module (904), and a playback module (905). The comprehensive test module (901) is used to test the hardware output or software simulation protocol communication status. The telemetry test module (902) is used to test the telemetry accuracy of the device under test. The telemetry signaling test module (903) is used to test at least one of the telemetry signaling anti-shake time, telemetry signaling storm, and telemetry signaling avalanche response. The remote control test module (904) is used to test the remote control correctness and hold time of the device under test. The playback module (905) is connected to the device under test and is used to export the fault process data during the test to realize fault playback.

6. The power distribution network operating condition high fidelity inversion system of claim 5, wherein: The telemetry unit (900) workflow includes: The telemetry test module (902) outputs three-phase AC voltage and current signals; The remote signaling test module (903) makes corresponding light changes based on the signal; The remote control test module (904) is used to test the remote control execution functions of each channel of the terminal; The playback module (905) is connected to the device under test and is used to export the fault process data during the test to realize fault playback; The remote signaling test module (903) performs corresponding light changes based on the output signal of the telemetry test module (902), including... When the output current is less than 0.5A, the remote signaling test module (903) displays a blue light, indicating that the remote signaling anti-shake time is less than 10ms; When the output current is greater than 0.5A and less than 1A, the remote signaling test module (903) displays a yellow light, indicating that the remote signaling anti-shake time is less than 20ms and greater than 10ms. When the output current stabilizes at 1A, the remote signaling test module (903) displays a green light, indicating that the remote signaling anti-jitter time is 20ms. When the output current is greater than 1A, the remote signaling test module (903) displays a red light, which means it sends a warning fault reminder.

7. A method of testing a power distribution network terminal, the method comprising: Using the high-fidelity inversion system for distribution network operating conditions as described in any one of claims 1 to 6, the distribution network terminal testing method includes the following steps: Acquire the target data of the device under test, and obtain the target state sequence based on the target data; Based on the target state sequence, the test case set, auxiliary test signals, and power supply signals input into the high-fidelity inversion system of the distribution network operating conditions are configured; Clock synchronization is performed through a clock synchronization unit, and then the industrial control computer unit tests the device under test and acquires test data. The state of the device under test is verified based on the test data to determine whether the test results are correct.

8. A terminal, characterized by: It includes a memory and a processor, the memory being used to store a computer program, and the processor being used to execute the computer program stored in the memory, so that the terminal performs the power distribution terminal testing method as described in claim 7.

9. A storage medium having stored thereon a computer program, characterized in that When the computer program is executed by the processor, it implements the steps of the method described in claim 7.

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