Network pressure interruption simulation device, method, storage medium and electronic device

Abstract

The application discloses a network voltage interruption simulation device and method, a storage medium and an electronic device. The device comprises: a fast mechanical switch branch connected to a power supply at one end and to an input end of a measured device at the other end; an electronic switch buffer energy absorption branch connected in parallel with the fast mechanical switch branch and provided with an electronic switch, used for diverting and shutting off loop current; and a control unit in communication with an upper computer, the fast mechanical switch and the electronic switch respectively, used for controlling interruption of the fast mechanical switch and the electronic switch according to a control instruction of the upper computer. The device solves the problems of long opening and shutting off delay and poor controllability of a parallel mechanical contactor, can accurately simulate network voltage interruption working conditions with different time lengths, has low on-state loss, small temperature rise, small volume and light weight, can quickly protect a test system and a measured converter device, makes a network voltage interruption test more convenient and fast, and further improves the safety and reliability of the test system.

Description

Technical Field

[0001] This invention relates to the field of voltage interruption experimental equipment technology, and particularly to a mains voltage interruption simulation device, method, storage medium, and electronic device. Background Technology

[0002] A voltage interruption occurs when a fault causes the power supply to be cut off during power transmission, resulting in a significant voltage drop at the equipment. After a period of time, the fault is cleared, and the power supply voltage returns to normal. Taking rail transit as an example, trains obtain and transmit power through a pantograph that slides against the overhead contact line. During high-speed train operation, various factors inevitably cause the pantograph and contact line to lose contact, resulting in a short-term voltage interruption.

[0003] Currently, when simulating mains voltage interruption conditions, most methods rely on controlling the on / off state of mechanical contactors. However, this method results in inaccurate and uncontrollable mains voltage interruption times, making it impossible to accurately simulate actual mains voltage interruption situations. Summary of the Invention

[0004] To address the above problems, this invention proposes a network voltage interruption simulation device, method, storage medium, and electronic device, which solve the following problems:

[0005] (1) In view of actual grid voltage interruption, a grid voltage interruption test device and application method based on hybrid circuit breaker is provided. Its advantage is that it can accurately simulate grid voltage interruption conditions of different durations.

[0006] (2) It solves the uncertainty and uncontrollability of the closing and opening delay time of mechanical contactors, and improves the accuracy of the mains voltage interruption time;

[0007] (3) It solves the problems of high on-state loss and poor reliability of test devices based on power electronic devices, improves the power transmission efficiency of the test system, saves power, and reduces the complexity and construction cost of the test system.

[0008] (4) It avoids the problem of damage to the device under test due to short circuit faults in the test system, and further improves the safety and reliability of the test system.

[0009] A first aspect of the present invention provides a network voltage interruption simulation device, the device comprising:

[0010] A fast mechanical switch branch with one end connected to the power supply and the other end connected to the input terminal of the device under test;

[0011] An electronic switch buffer energy absorption branch connected in parallel with the fast mechanical switch branch and equipped with an electronic switch is used to transfer and shut off the circuit current.

[0012] A control unit that communicates with the host computer, the fast mechanical switch, and the electronic switch respectively, and is used to perform interrupt control on the fast mechanical switch and the electronic switch according to the control instructions of the host computer.

[0013] In some embodiments, the electronic switch buffer energy absorption branch includes:

[0014] An electronic switch branch and a buffer energy absorption branch connected in parallel with the electronic switch branch.

[0015] In some embodiments, it also includes:

[0016] The current detection unit installed in the main circuit is used to detect the current of the main circuit.

[0017] The temperature detection unit installed in the electronic switch buffer energy absorption branch is used to detect the current temperature inside the device.

[0018] In some embodiments, the control unit includes:

[0019] A communication module is used to communicate with the host computer, the fast mechanical switch, and the electronic switch;

[0020] The data processing module is used to obtain multiple interruption flags based on the current temperature, and to obtain a shutdown flag based on the current current.

[0021] The control module is used to control the fast mechanical switch and the electronic switch through the communication module according to the multiple interruption flags and the shutdown flags;

[0022] Specifically, when the shutdown flag is abnormal, the control unit cuts off the current current; when the multiple interruption flag is abnormal, the control unit does not perform multiple interruption control.

[0023] In some embodiments, obtaining multiple interruption identifiers based on the current temperature includes:

[0024] Determine whether the current temperature is not less than a preset temperature threshold;

[0025] When the current temperature is not less than a preset temperature threshold, an abnormal multiple interruption flag is obtained;

[0026] When the current temperature is less than a preset temperature threshold, a normal multiple interruption flag is obtained.

[0027] In some embodiments, obtaining the shutdown flag based on the current current includes:

[0028] Determine whether the current is not less than a preset current threshold;

[0029] When the current current is not less than a preset current threshold, an abnormal shutdown flag is obtained;

[0030] When the current is less than a preset current threshold, a normal shutdown indicator is obtained.

[0031] In some embodiments, the electronic switch includes:

[0032] One or more sets of unit electronic switches.

[0033] In some embodiments, the buffer energy-absorbing branch includes:

[0034] The unit buffer energy absorption branch corresponding to each unit electronic switch.

[0035] A second aspect of the present invention provides a method for simulating network voltage interruption, the method comprising:

[0036] When an interrupt command is received, the control unit closes the electronic switch and simultaneously opens the quick mechanical switch;

[0037] When the rapid mechanical switch is fully open, the control unit disconnects the electronic switch and begins recording the interruption duration;

[0038] When the control unit determines that the interruption duration has reached the preset interruption duration, the control unit closes the electronic switch;

[0039] When the driving capacitor inside the fast mechanical switch is fully charged, the fast mechanical switch closes, and at the same time, the control unit disconnects the electronic switch.

[0040] A third aspect of the invention provides a storage medium storing a computer program that can be executed by one or more processors to implement the network voltage interruption simulation method described above.

[0041] A fourth aspect of the present invention provides an electronic device including a memory and a processor, wherein a computer program is stored on the memory and the processor is communicatively connected to each other, and the computer program, when executed by the processor, implements the network voltage interruption simulation method as described above.

[0042] Compared with the prior art, the technical solution of the present invention has the following advantages or beneficial effects:

[0043] 1. Compared with the existing mechanical contactor test device, which cannot simulate a mains voltage interruption time of less than 20ms, this disclosure can accurately simulate mains voltage interruption conditions of different durations by controlling the on / off state of the electronic switch branch.

[0044] 2. This disclosure replaces the original mechanical contactor with a hybrid circuit breaker, thus solving the problems of long opening and closing delays and poor controllability of parallel mechanical contactors.

[0045] 3. Compared with all-solid-state electronic switches, the present invention has very low conduction loss and low temperature rise, and can be cooled naturally without the need for additional heat dissipation devices.

[0046] 4. The technical solution disclosed herein includes a current sensor. When a short circuit fault occurs in the system and the short circuit current reaches the protection threshold, the control module will issue a shutdown command. Through the coordinated action between the fast mechanical switch and the electronic switch, the short circuit current can be cut off instantly, which can quickly protect the safety of the test system and the tested converter equipment, and further improve the safety and reliability of the test system.

[0047] 5. In the technical solution of this disclosure, the internal temperature of the device is monitored in real time by a temperature sensor, and the signal allowing the next interruption test is fed back to the host computer after being processed by the control module. The interval time of each interruption test is intelligently controlled to maintain the dynamic balance between temperature rise and heat dissipation inside the device, so that the internal temperature of the device is stabilized within a certain safe range. This not only ensures the safe and reliable operation of the test system, but also makes the mains voltage interruption test more convenient and faster.

[0048] 6. This disclosure requires only one hybrid DC circuit breaker to achieve the grid voltage interruption function. In terms of size and weight, the lightweight, compact, and modular design of the fast mechanical switch, electronic switch, and buffer branch makes the hybrid DC circuit breaker smaller and lighter; in addition, in terms of price, with the rapid development of power electronic device manufacturing technology, while improving the performance of power electronic devices, it also reduces costs to a certain extent. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0050] Figure 1 A connection diagram of a network voltage interruption experimental system provided in this embodiment of the present disclosure;

[0051] Figure 2 This is a schematic diagram of the structure of a network voltage interruption simulation device provided in an embodiment of the present disclosure;

[0052] Figure 3A schematic diagram of an electronic switch buffer energy absorption branch topology provided in this embodiment of the disclosure;

[0053] Figure 4 A flowchart of a network voltage interruption simulation method provided in this disclosure embodiment;

[0054] Figure 5 A connection block diagram of an electronic device provided in an embodiment of this disclosure;

[0055] Figure label:

[0056] Figure 1 In the diagram, 101-Power supply, 102-Main voltage interruption simulation device, 103-Device under test, 104-Host computer;

[0057] Figure 2 In the diagram, 201 is a fast mechanical switch, 202 is an electronic switch, 203 is a buffer energy absorption branch, 204 is a control unit, and 205 is a current sensor. Detailed Implementation

[0058] The following will describe in detail the implementation methods of this disclosure with reference to the accompanying drawings and embodiments, so as to fully understand how this disclosure uses technical means to solve technical problems and achieve corresponding technical effects, and to implement it accordingly. The embodiments of this disclosure and the various features in the embodiments can be combined with each other without conflict, and the resulting technical solutions are all within the protection scope of this disclosure.

[0059] Example 1

[0060] This embodiment provides a network voltage interruption simulation device, which is applied to a network voltage interruption experimental system. Figure 1 A connection diagram of a network voltage interruption experimental system provided in this embodiment of the present disclosure is shown below. Figure 1 As shown, the grid voltage interruption experimental system includes: a power supply 101, a grid voltage interruption simulation device 102, a device under test 103, and a host computer 104. The device under test can be either a DC device or an AC device.

[0061] Figure 2 This is a schematic diagram of the structure of a network voltage interruption simulation device provided in an embodiment of the present disclosure, as shown below. Figure 2 As shown, the apparatus of this embodiment includes:

[0062] A fast mechanical switch branch with one end connected to the power supply and the other end connected to the input terminal of the device under test;

[0063] An electronic switch buffer energy absorption branch connected in parallel with the fast mechanical switch branch and equipped with an electronic switch is used to transfer and shut off the circuit current.

[0064] A control unit that communicates with the host computer, the fast mechanical switch, and the electronic switch respectively, and is used to perform interrupt control on the fast mechanical switch and the electronic switch according to the control instructions of the host computer.

[0065] It should be noted that the mains voltage interruption simulation device disclosed in this embodiment is applicable to both AC and DC power. When the power supply is single-phase AC, a single mains voltage interruption simulation device can be used. When the power supply is three-phase AC, three mains voltage interruption simulation devices can be connected in series in different three-phase branches to meet application requirements. Since the main circuit interface of the mains voltage interruption simulation device is connected in series between the power supply and the device under test, forming a closed loop, the interruption of mains voltage during transmission is simulated by controlling the opening and closing of the mains voltage interruption simulation device.

[0066] In some embodiments, the electronic switch buffer energy absorption branch includes:

[0067] An electronic switch branch and a buffer energy absorption branch connected in parallel with the electronic switch branch.

[0068] In some embodiments, the electronic switch includes:

[0069] One or more sets of unit electronic switches.

[0070] In some embodiments, the buffer energy-absorbing branch includes:

[0071] The unit buffer energy absorption branch corresponding to each unit electronic switch.

[0072] In the main circuit, the fast mechanical switch branch primarily serves as a current-carrying component; during normal operation, the loop current mainly flows through this branch. The main function of the electronic switch branch is to transfer and interrupt the loop current. It is constructed using one or more sets of unit electronic switches connected in series and parallel, with specific combinations depending on actual needs. Any set of unit electronic switches can be composed of multiple power electronic devices connected in reverse series or reverse parallel, achieving bidirectional current flow. The buffer energy-absorbing branch primarily limits overvoltage during the turn-off of power electronic devices and absorbs the energy stored in the inductor in the interrupted loop, protecting the electronic switches. The buffer energy-absorbing branch is constructed using resistors, capacitors, and MOVs (Metal-Oxide-Varistor) connected in series and parallel. For example, the buffer energy-absorbing branch can be configured such that the branch containing the resistor and capacitor in series is then connected in parallel with the branch containing the MOV. Figure 3 This is a schematic diagram of an electronic switch buffer energy absorption branch topology provided in an embodiment of this disclosure. Each group of unit electronic switches is configured with a corresponding buffer energy absorption branch, and the corresponding topology is as follows: Figure 3As shown, the MOV device adopts a modular configuration, and the entire structure is flexible and versatile. Through the series and parallel connection of different numbers of electronic switches and the modular configuration of MOV, it can meet the test requirements of different voltage and current levels.

[0073] The power electronic devices and buffer energy absorption branches used in the unit electronic switch can be adapted to the power supply. For example, in an AC system, the topology of the unit electronic switch can be composed of anti-parallel thyristors or bidirectional thyristors. At the same time, the buffer energy absorption branch only needs resistor and capacitor elements and does not need to be configured with MOV elements.

[0074] In some embodiments, it also includes:

[0075] The current detection unit installed in the main circuit is used to detect the current of the main circuit.

[0076] The temperature detection unit installed in the electronic switch and buffer energy absorption branch is used to detect the current temperature inside the device.

[0077] Optionally, the temperature detection unit includes a temperature sensor for detecting the current temperature inside the mains voltage interruption simulation device and feeding the detection data back to the control unit; the current detection unit includes a current sensor for detecting the current current in the main circuit of the mains voltage interruption simulation device and feeding the detection data back to the control unit.

[0078] In some embodiments, the temperature detection unit is used to detect the temperature inside the device in real time or at a first preset time interval.

[0079] In some embodiments, the current detection unit is used to detect the main circuit current in real time or at a second preset time interval.

[0080] It should be noted that both the first and second preset time intervals can be set according to the user's actual needs, and no specific restrictions are imposed here.

[0081] Optionally, the control unit communicates with the speed mechanical switch and electronic switch through the control module. The control module communicates with the drive board of the speed mechanical switch and electronic switch for issuing commands and providing feedback. The control unit controls the interrupt duration through the time processing module, which can acquire / record the current system time and supports comparison / calculation operations on multiple time points.

[0082] In some embodiments, the control unit includes:

[0083] A communication module is used to communicate with the host computer, the fast mechanical switch, and the electronic switch;

[0084] The data processing module is used to obtain multiple interruption flags based on the current temperature, and to obtain a shutdown flag based on the current current.

[0085] The control module is used to control the fast mechanical switch and the electronic switch through the communication module according to the multiple interruption flags and the shutdown flags;

[0086] Specifically, when the shutdown flag is abnormal, the control unit cuts off the current current; when the multiple interruption flag is abnormal, the control unit does not perform multiple interruption control.

[0087] In some embodiments, obtaining multiple interruption identifiers based on the current temperature includes:

[0088] Determine whether the current temperature is not less than a preset temperature threshold;

[0089] When the current temperature is not less than a preset temperature threshold, an abnormal multiple interruption flag is obtained;

[0090] When the current temperature is less than a preset temperature threshold, a normal multiple interruption flag is obtained.

[0091] In some embodiments, obtaining a shutdown flag based on the current current includes:

[0092] Determine whether the current is not less than a preset current threshold;

[0093] When the current current is not less than a preset current threshold, an abnormal shutdown flag is obtained;

[0094] When the current is less than a preset current threshold, a normal shutdown indicator is obtained.

[0095] Optionally, after receiving the detection data from the temperature detection unit or the current detection unit, the control unit further analyzes and processes the detection data through the data processing module to obtain corresponding analysis results. The control unit then takes the next action based on the analysis results. When the current temperature is not less than a preset temperature threshold, an abnormal multiple interruption flag is obtained, and the control unit does not perform multiple interruption control. When the current current is not less than a preset current threshold, an abnormal shutdown flag is obtained, and the control unit cuts off the current current.

[0096] For example, when a short circuit fault occurs in the system and the short circuit current reaches the protection threshold, the control unit will issue a shutdown command. Through the coordinated action of the fast mechanical switch and the electronic switch, the short circuit current can be cut off instantly, which can quickly protect the safety of the test system and the converter equipment under test, and further improve the safety and reliability of the test system.

[0097] For example, during each interruption test, the short-term current flow of the electronic switch and the energy absorption of the buffer energy-absorbing element will generate a certain amount of heat. Since the device uses natural cooling, repeated short-term interruption tests will cause the internal temperature of the device to rise sharply. The temperature sensor monitors the internal temperature of the device in real time, and after processing by the control board, it feeds back a signal to the host computer to allow the next interruption test. It intelligently controls the interval between each interruption test, maintaining a dynamic balance between internal temperature rise and heat dissipation, so that the internal temperature of the device is kept within a safe range. This ensures the safe and reliable operation of the test system and makes the mains voltage interruption test more convenient and faster.

[0098] In some possible embodiments, the control unit can also send temperature / current detection data to a host computer via a communication module. In some embodiments, the control unit further includes:

[0099] The power module is used to connect to an external power supply and perform voltage conversion, and to supply power to the mains voltage interruption simulation device.

[0100] It should be noted that the host computer may include devices such as computers and smart mobile terminals. When communicating with the host computer through the communication module, it can both receive data and / or instructions from the host computer and send data to the host computer.

[0101] It should be further noted that the communication module is used for wired or wireless communication between this network voltage interruption simulation device and other devices / systems. Wired communication includes communication via network ports, serial ports, and parallel ports; wireless communication includes Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, 5G, or one or more combinations thereof.

[0102] Example 2

[0103] This embodiment provides a method for simulating network voltage interruption. Figure 4 A flowchart of a network voltage interruption simulation method provided in this disclosure embodiment is shown below. Figure 4 As shown, the method in this embodiment includes:

[0104] S100. When an interrupt command is received, the control unit closes the electronic switch and simultaneously opens the fast mechanical switch.

[0105] Optionally, the host computer sends an interrupt command. After receiving the interrupt command, the control unit disconnects the fast mechanical switch and simultaneously closes the electronic switch, transferring the circuit current to the electronic switch branch.

[0106] S200: When the fast mechanical switch is fully open, the control unit disconnects the electronic switch and begins recording the interruption duration.

[0107] Optionally, after a certain time delay (the delay refers to the time elapsed from when the fast mechanical switch receives the instruction to when the fast mechanical switch is completely disconnected), the electronic switch is disconnected and the current time is recorded. This time is the starting point of the interrupt time, and the host computer or control unit starts the interrupt timer.

[0108] S300: When the control unit determines that the interruption duration has reached the preset interruption duration, the control unit closes the electronic switch.

[0109] Optionally, after a preset mains voltage interruption time interval, the electronic switch branch is closed first, so that the power supply, the electronic switch branch and the test object form a closed loop, and the voltage applied across the test object is restored.

[0110] S400: When the drive capacitor inside the fast mechanical switch is fully charged, the fast mechanical switch is closed, and the control unit simultaneously disconnects the electronic switch.

[0111] Optionally, after the fast mechanical switch drives the capacitor to complete charging, the fast mechanical switch is closed and the electronic switch branch is disconnected. The current is transferred to the fast mechanical switch, which carries the current for a long time, thus completing the single interruption mode.

[0112] In some embodiments, the control unit determines that the interrupt duration has reached a preset interrupt duration, including:

[0113] The first time is recorded when the control unit begins recording the interrupt duration.

[0114] Get the current time as the second time;

[0115] When the difference between the second time and the first time is equal to the preset interrupt duration, it is determined that the interrupt duration has reached the preset interrupt duration.

[0116] It should be noted that the preset interruption duration can be set according to the user's actual needs, and there is no specific limitation here.

[0117] Optionally, the time when the control unit starts recording the interrupt duration is recorded as the first time, and the current time is obtained as the second time. When the difference between the first time and the second time is equal to the preset time interval, it can be considered that the preset network voltage interrupt time interval has elapsed.

[0118] When the mains voltage interruption simulation device operates in this mains voltage interruption mode, the opening and closing of the electronic switch can be controlled to accurately simulate mains voltage interruption conditions of different durations. Furthermore, due to the precise controllability of the electronic switch, the interruption time and the step size for each test can be more accurately controlled.

[0119] It should be noted that the network voltage interruption simulation device disclosed herein not only has the network voltage interruption mode as described above, but also has multiple operating modes such as normal conduction mode, normal shutdown mode, and frequent operation mode.

[0120] Optionally, the host computer sends a conduction command, and after receiving the command, the control unit closes the fast mechanical switch and keeps the electronic switch branch open.

[0121] When the mains voltage interruption simulation device operates in this normal conduction mode, the power supply, the fast mechanical switch, and the device under test form a closed loop. The current only flows through the fast mechanical switch branch of the mains voltage interruption simulation device. Because the mechanical switch has low conduction impedance and small temperature rise, the device has advantages such as low conduction loss and good heat dissipation performance.

[0122] Optionally, the host computer issues a shutdown command. Upon receiving the command, the control unit controls the coordinated operation of the fast mechanical switch branch and the electronic branch to shut down the circuit breaker. Taking a DC system application as an example, after receiving the shutdown command from the host computer, the control module sends a disconnect command to the fast mechanical switch and a closing command to the electronic switch. After receiving the command, the mechanical switch begins to perform the opening operation, and the circuit current is transferred from the mechanical switch branch to the electronic switch branch. After a certain delay, the electronic switch is opened, the circuit current drops to zero, and the circuit breaker completes the shutdown operation.

[0123] When the mains voltage interruption simulation device operates in this normal shutdown mode, no electric arc is generated during the shutdown process, and there will be no burning of mechanical switch contacts, which can improve the service life of mechanical switches; moreover, the control is simple and the shutdown speed is fast, making the operation of the test system safer and more reliable.

[0124] Optionally, when multiple interruption tests are required, the network voltage interruption simulation device needs to be switched to frequent operation mode. The host computer issues an interrupt command. After receiving the command, the action logic of each branch is the same as in the network voltage interruption mode. During each interruption, the current internal temperature of the device is monitored in real time by a temperature sensor and fed back to the control module. The control module processes the data according to the preset temperature threshold and the current internal temperature of the device according to the preset processing rules, and then feeds back the signal that the next interruption test can be performed to the host computer. When the tester receives this signal, the next network voltage interruption test is performed, thereby realizing the frequent operation of the network voltage interruption simulation device to perform multiple network voltage interruption tests.

[0125] When operating in this frequent working mode, the time interval between each interruption test is more controllable, and the grid voltage interruption simulation device can also dissipate heat fully during frequent operation, ensuring the safe and reliable operation of the test system and making grid voltage interruption tests more convenient and faster.

[0126] It should be noted that the preset temperature threshold and preset processing rules can be set according to the user's actual needs, and no specific restrictions are imposed here.

[0127] It should be further noted that when multiple interruption indicators appear, it means that the current temperature inside the device is not lower than the preset temperature threshold. At this time, multiple interruption simulations should not be performed.

[0128] Example 3

[0129] This embodiment also provides a storage medium storing a computer program. When the computer program is executed by a processor, it can implement the method steps as described in Embodiment 2. This embodiment will not repeat the details here.

[0130] The storage medium may individually include computer programs, data files, data structures, etc., or a combination thereof. The storage medium or computer program may be specifically designed and understood by those skilled in the art of computer software, or the storage medium may be known and available to those skilled in the art of computer software. Examples of storage media include: magnetic media, such as hard disks, floppy disks, and magnetic tapes; optical media, such as CD-ROMs and DVDs; magneto-optical media, such as optical discs; and hardware devices specifically configured to store and execute computer programs, such as read-only memory (ROM), random access memory (RAM), flash memory; or servers, app stores, etc. Examples of computer programs include machine code (e.g., code generated by a compiler) and files containing high-level code that can be executed by a computer using an interpreter. The described hardware devices may be configured to function as one or more software modules to perform the operations and methods described above, and vice versa. Furthermore, the storage medium may be distributed across a networked computer system, allowing for the decentralized storage and execution of program code or computer programs.

[0131] Example 4

[0132] Figure 5 A connection block diagram of an electronic device provided in an embodiment of this disclosure, such as... Figure 5 As shown, the electronic device 500 may include: a processor 501, a memory 502, a multimedia component 503, an input / output (I / O) interface 504, and a communication component 505.

[0133] The processor 501 is used to execute all or part of the steps in the network voltage interruption simulation method as described in Embodiment 2. The memory 502 is used to store various types of data, which may include, for example, instructions for any application or method in the electronic device, as well as application-related data.

[0134] The processor 501 may be implemented as an application-specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field-programmable gate array (FPGA), a controller, a microcontroller, a microprocessor, or other electronic components, and is used to execute the network voltage interrupt simulation method in Embodiment 2 above.

[0135] The memory 502 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0136] Multimedia component 503 may include a screen, which may be a touchscreen, and an audio component for outputting and / or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may be further stored in memory or transmitted via a communication component. The audio component also includes at least one speaker for outputting audio signals.

[0137] I / O interface 504 provides an interface between processor 501 and other interface modules, such as keyboards, mice, and buttons. These buttons can be virtual or physical buttons.

[0138] The communication component 505 is used for wired or wireless communication between the electronic device 500 and other devices. Wired communication includes communication via network ports, serial ports, etc.; wireless communication includes Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, 5G, or one or more combinations thereof. Therefore, the corresponding communication component 505 may include a Wi-Fi module, a Bluetooth module, and an NFC module.

[0139] In summary, this disclosure provides a grid voltage interruption simulation device, method, storage medium, and electronic device. The device includes: a fast mechanical switch branch connected at one end to a power supply and at the other end to the input terminal of the device under test; an electronic switch buffer energy-absorbing branch connected in parallel with the fast mechanical switch branch and equipped with an electronic switch for transferring and switching off the circuit current; and a control unit that communicates with a host computer, the fast mechanical switch, and the electronic switch, respectively, for interrupting the fast mechanical switch and the electronic switch according to control commands from the host computer. This solution addresses the problems of long turn-on and turn-off delays and poor controllability of parallel mechanical contactors, accurately simulating grid voltage interruption conditions of varying durations. It features low conduction losses, low temperature rise, smaller size, and lighter weight, enabling rapid protection of the test system and the tested converter equipment. This makes grid voltage interruption testing more convenient and faster, further improving the safety and reliability of the test system.

[0140] It should also be understood that the methods or systems disclosed in the embodiments provided in this invention can also be implemented in other ways. The method or system embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the architecture, functions, and operations of possible implementations of methods and apparatus according to various embodiments of the invention. In this regard, each block in a flowchart or block diagram may represent a module, computer program segment, or part of a computer program, which includes one or more computer programs for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings, and may actually be executed substantially in parallel, or sometimes in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or can be implemented using a combination of dedicated hardware and computer programs.

[0141] In this invention, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "including one..." does not exclude the presence of other identical elements in the process, method, apparatus, or device that includes the element; the use of terms such as "first" and "second" is for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly indicating the number or sequence of the indicated technical features; in the description of this invention, unless otherwise stated, the terms "a plurality of" or "many" mean at least two; if a server is described, it should be noted that a server can be an independent physical server or terminal, or a server cluster consisting of multiple physical servers, or a cloud server capable of providing basic cloud computing services such as cloud servers, cloud databases, cloud storage, and CDN; if a smart terminal or mobile device is described, it should be noted that a smart terminal or mobile device can be a smartphone, tablet computer, smartwatch, smart TV, smart speaker, laptop computer, desktop computer, etc., but is not limited to these.

[0142] Finally, it should be noted that in the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "a single example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0143] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are merely implementation methods adopted to facilitate understanding of the present invention, and are not intended to limit the present invention. Any person skilled in the art to which this invention pertains may make any modifications and changes in form and detail of the implementation without departing from the spirit and scope disclosed herein; however, the scope of protection of the present invention shall still be determined by the scope defined in the appended claims.

Claims

1. A method for simulating network voltage interruption in a network voltage interruption simulation device, characterized in that, The mains voltage interruption simulation device includes: a fast mechanical switch branch connected at one end to the power supply and at the other end to the input terminal of the device under test; an electronic switch buffer energy absorption branch connected in parallel with the fast mechanical switch branch and equipped with an electronic switch, used to transfer and shut off the circuit current; and a control unit that communicates with the host computer, the fast mechanical switch, and the electronic switch respectively, and is used to perform interruption control on the fast mechanical switch and the electronic switch according to the control instructions of the host computer; the mains voltage interruption simulation method includes: When an interrupt command is received, the control unit closes the electronic switch and simultaneously opens the quick mechanical switch; When the rapid mechanical switch is fully open, the control unit disconnects the electronic switch and begins recording the interruption duration; When the control unit determines that the interruption duration has reached the preset interruption duration, the control unit closes the electronic switch; When the driving capacitor inside the fast mechanical switch is fully charged, the fast mechanical switch closes, and at the same time, the control unit disconnects the electronic switch.

2. The method according to claim 1, characterized in that, The electronic switch buffer energy absorption branch includes: An electronic switch branch and a buffer energy absorption branch connected in parallel with the electronic switch branch.

3. The method according to claim 1, characterized in that, The mains voltage interruption simulation device also includes: The current detection unit installed in the main circuit is used to detect the current of the main circuit. The temperature detection unit installed in the electronic switch buffer energy absorption branch is used to detect the current temperature inside the device.

4. The method according to claim 3, characterized in that, The control unit includes: A communication module is used to communicate with the host computer, the fast mechanical switch, and the electronic switch; The data processing module is used to obtain multiple interruption flags based on the current temperature, and to obtain a shutdown flag based on the current current. The control module is used to control the fast mechanical switch and the electronic switch through the communication module according to the multiple interruption flags and the shutdown flags; Specifically, when the shutdown flag is abnormal, the control unit cuts off the current current; when the multiple interruption flag is abnormal, the control unit does not perform multiple interruption control.

5. The method according to claim 4, characterized in that, The step of obtaining multiple interruption identifiers based on the current temperature includes: Determine whether the current temperature is not less than a preset temperature threshold; When the current temperature is not less than a preset temperature threshold, an abnormal multiple interruption flag is obtained; When the current temperature is less than a preset temperature threshold, a normal multiple interruption flag is obtained.

6. The method according to claim 4, characterized in that, The step of obtaining the shutdown flag based on the current current includes: Determine whether the current is not less than a preset current threshold; When the current current is not less than a preset current threshold, an abnormal shutdown flag is obtained; When the current is less than a preset current threshold, a normal shutdown indicator is obtained.

7. The method according to claim 2, characterized in that, The electronic switch includes: One or more sets of unit electronic switches.

8. The method according to claim 7, characterized in that, The buffer energy absorption branch includes: The unit buffer energy absorption branch corresponding to each unit electronic switch.

9. A storage medium, characterized in that, The computer program stored in the storage medium, when executed by one or more processors, performs the network voltage interruption simulation method as described in any one of claims 1-8.

10. An electronic device, characterized in that, It includes a memory and a processor, wherein a computer program is stored in the memory, and the memory and the processor are interconnected. When the computer program is executed by the processor, the network voltage interruption simulation method as described in any one of claims 1-8 is executed.

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