Starting method of interconnection device, electronic equipment and storage medium

Abstract

In order to solve the problem that a current conversion chain does not bear the total voltage of a system and cannot directly complete sub-module energy taking through the voltage of the system, the invention provides a starting method of an interconnection device, electronic equipment and a storage medium, comprising the following steps: connecting a first parallel branch and a second parallel branch of the interconnection device; enabling the direct-current voltage of the first direct-current capacitor to be higher than a first starting threshold, unlocking the power semiconductor device in the first bridge circuit, controlling the direct-current voltage of the first direct-current capacitor to reach an operation rated value, connecting the series branch, unlocking the power semiconductor device in the first full-bridge circuit, and starting the power semiconductor device in the first full-bridge circuit. The method for controlling the power transmission between the first alternating-current power grid and the second alternating-current power grid is simple and easy to implement, and the reliability of the device is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of alternating current power transmission, and in particular to a method for starting an interconnection device, an electronic device and a storage medium. Background Art

[0002] In urban load centers, with the development of distribution networks, grid equipment has become overloaded due to unexpected load growth in some local areas. As the proportion of new energy increases, problems such as “power reverse transmission” have become increasingly serious, requiring the provision of reasonable nodes and paths for the absorption of new energy.

[0003] At present, methods such as adding new points in traditional power grids are limited by line corridor resources and require high investments. There is a problem of electromagnetic ring network when connecting lines through connecting switches. Therefore, flexible interconnection technology is needed to achieve flexible power regulation and dynamic capacity expansion.

[0004] In the prior art, there are solutions for realizing flexible interconnection by using power electronic converters, such as using an AC-DC-AC converter to connect the AC lines of two power supplies. There is DC isolation between the two back-to-back converters, and the AC voltage amplitude and phase are adjusted on the AC side respectively, so that flexible interconnection can be realized. However, the cost of this solution is relatively high, and two sets of back-to-back full-power converters for rectification and inversion are required. The parallel flexible interconnection solution is not cost-effective.

[0005] In addition, there is currently a flexible AC controllable interconnection that uses a sub-module cascade method, which directly connects the AC lines of two power sources in series through inductors, and uses the voltage difference between the systems on both sides to adjust the transmission power. This solution has low converter valve losses, high efficiency, and low cost and footprint.

[0006] The flexible AC controllable interconnection topology is essentially a series topology solution. Since the commutation chain does not bear the full system voltage, the sub-module energy cannot be directly obtained through the system voltage. The conventional parallel flexible interconnection startup method is not applicable. It is necessary to study a suitable system startup solution for the flexible AC controllable interconnection topology.

[0007] In order to solve the above problems, the Chinese invention patent with patent number CN116961079B proposes a flexible interconnection device PET branch startup method and related devices, the startup method is applied to the flexible interconnection device composed of PET branch, CHB1 branch and CHB2 branch; firstly, an equivalent model of PET branch startup is established, and then the startup method of the flexible interconnection device is designed based on the equivalent model. However, the invention does not solve the problem that the submodule cannot directly obtain energy through the system voltage. Summary of the invention

[0008] The present invention mainly solves the problem in the prior art that the commutation chain cannot withstand the full system voltage, the sub-module energy cannot be directly obtained through the system voltage, and the conventional parallel flexible interconnection starting method is not applicable. A starting method, electronic device and storage medium of an interconnection device are provided.

[0009] The above technical problems of the present invention are mainly solved by the following technical solutions: A method for starting an interconnection device, characterized in that it comprises the following steps: S1. Connecting a first parallel branch and a second parallel branch of an interconnection device so that a DC voltage of the first DC capacitor is higher than a first start-up threshold, wherein the interconnection device comprises a third switch and a fourth switch, wherein the interconnection device comprises a three-phase interconnected commutation chain and an energy supply unit, wherein the three-phase interconnected commutation chain comprises a plurality of power balancing submodules; S2, the power semiconductor device in the first bridge circuit is unlocked and operated, and the DC voltage of the first DC capacitor is controlled to an operating rated value; S3. Connect the series branches, unlock the power semiconductor devices in the first full-bridge circuit and operate to control power transmission between the first AC power grid and the second AC power grid.

[0010] As a preferred solution, step S1 specifically includes the following steps: S1.1. Close the first switch or the second switch to connect one end of the interconnection device to the first AC power grid or the second AC power grid; S1.2, close the third switch or the fourth switch to connect the first parallel branch to the first AC power grid or the second parallel branch to the second AC power grid; S1.3, start the energy supply unit to charge the first DC capacitor; S1.4. The power balancing submodule includes a bypass switch and a submodule control unit. The bypass switch is connected in parallel to the AC side of the power balancing submodule. When the DC voltage of the first DC capacitor is higher than the first threshold value, the submodule control unit starts to perform self-check on the power balancing submodule.

[0011] As a preferred solution, in step S1.4, if the self-check result indicates that the power balancing submodule is abnormal during the self-check process, the bypass switch is controlled to be closed, and the power balancing submodule status is marked as exit.

[0012] As a preferred solution, when the number of power balancing sub-modules exiting a certain phase is greater than a preset redundant number, the sub-module control unit controls the power semiconductor devices of the first full-bridge circuit and the first bridge circuit to lock, and trips the first switch, the second switch, the third switch and the fourth switch.

[0013] As a preferred solution, a mechanical interlock, an electrical interlock, or a software interlock logic is provided between the third switch and the fourth switch, and the third switch and the fourth switch are not allowed to be closed at the same time.

[0014] As a preferred solution, the energy supply unit includes a plurality of multi-winding transformers, the primary sides of the multi-winding transformers are connected to an AC power source, and the secondary sides of the multi-winding transformers are connected to the AC end of the first bridge circuit of the three-phase connected commutation chain.

[0015] As a preferred solution, the energy supply unit includes several isolation conversion units, each of which is connected to one of the power balancing sub-modules, and each of the isolation conversion units includes a high-frequency transformer, a second bridge circuit and a second DC capacitor. The primary side of the high-frequency transformer is connected to the AC end of the first bridge circuit, the secondary side of the high-frequency transformer is connected to the AC end of the second bridge circuit, and the DC end of the second bridge circuit is connected in parallel with the second DC capacitor.

[0016] As a preferred solution, the energy supply unit also includes a plurality of low-voltage DC power supplies, which include a step-down transformer and a rectifier bridge. The primary side of the step-down transformer is connected to an AC power supply, the secondary side of the step-down transformer is connected to an AC input end of the rectifier bridge, and the DC output end of the rectifier bridge is connected in parallel with the second DC capacitor.

[0017] An electronic device, characterized in that it includes a processor and a memory, wherein the processor stores computer instructions, and when the computer instructions are executed by the processor, the computer instructions cause the processor to execute the startup method of the interconnected device according to any one of claims 1 to 8.

[0018] A storage medium, characterized in that a computer program is stored therein, and when the computer program is executed by multiple processors, the processors execute the startup method of an interconnected device as described in any one of claims 1 to 8.

[0019] Therefore, the advantages of the present invention are: 1. The startup method provided by the present invention solves the problem that the commutation chain of the interconnected device cannot directly charge the submodule using the full voltage of the system. The method is simple and easy to implement, and greatly improves the reliability of the device.

[0020] 2. The startup method provided by the present invention connects the AC lines of the two power supplies after the energy supply unit completes startup and the bridge circuit connecting the submodule and the energy supply unit is unlocked and running, thereby reducing the DC voltage fluctuation of the submodule caused by operational overvoltage when connected to the AC line, and ensuring the smooth startup of the system.

[0021] 3. After the energy supply unit is started, the startup method provided by the present invention can reliably start the submodule control unit. Afterwards, the submodule status is monitored in real time at each stage of the startup. If an abnormality is found, it is processed in time to ensure the safety of system startup. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a flow chart of the startup method of the present invention.

[0023] Figure 2 is a circuit diagram of the interconnection device of the present invention.

[0024] Figure 3 It is a structural diagram of an electronic device of the present invention. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings. Example

[0026] An embodiment of the present invention provides a method for starting an interconnected device, comprising the following steps: S1. Connecting the first parallel branch and the second parallel branch of the interconnection device so that the DC voltage of the first DC capacitor is higher than a first starting threshold. The interconnection device includes a third switch and a fourth switch. The interconnection device includes a three-phase interconnected commutation chain and a power supply unit. The three-phase interconnected commutation chain includes a plurality of power balancing submodules.

[0027] S1.1. Close the first switch or the second switch to connect one end of the interconnection device to the first AC power grid or the second AC power grid.

[0028] S1.2. Close the third switch or the fourth switch, so that the first parallel branch is connected to the first AC power grid or the second parallel branch is connected to the second AC power grid.

[0029] S1.3. Start the energy supply unit to charge the first DC capacitor in the power balancing submodule.

[0030] When the energy supply unit is a multi-winding transformer, the energy supply unit can be automatically excited and started by closing the third switch or the fourth switch.

[0031] When the energy supply unit is an isolation unit connected in series with a low-voltage DC power supply, the rectifier bridge in the low-voltage DC power supply is first unlocked during startup so that the DC voltage of the second DC capacitor is higher than the second startup threshold, and then the second bridge circuit in the isolation unit is unlocked to complete the startup of the energy supply unit.

[0032] S1.4. When the DC voltage of the first DC capacitor is higher than the first threshold value, the submodule control unit in the first bridge circuit is started to perform a self-check on the power balancing submodule; If the self-test result indicates that there is an abnormality in the sub-module, the bypass switch of the sub-module is controlled to be closed, and the status of the sub-module is marked as exited; when the number of sub-modules exiting a certain phase is greater than the preset redundant number N, the sub-module control unit controls the first full-bridge circuit and the first bridge circuit power semiconductor device to be locked, and the first switch, the second switch, the third switch and the fourth switch are tripped.

[0033] S2. The power semiconductor device in the first bridge circuit is unlocked and operated, and the DC voltage of the first DC capacitor is controlled to an operating rated value.

[0034] The submodule control unit controls the power semiconductor device of the first bridge circuit to be unlocked, and controls the DC voltage of the first DC capacitor to an operating rated value.

[0035] S3. Connect the series branches, unlock the power semiconductor devices in the first full-bridge circuit and operate to control power transmission between the first AC power grid and the second AC power grid.

[0036] S3.1. Close the second switch or the first switch to connect the first series branch of the interconnection device, so that two ends of the interconnection device are connected to the first AC power grid and the second AC power grid respectively; S3.2. The submodule control unit controls the unlocking of the power semiconductor device of the first full-bridge circuit to control the power transmission between the first AC power grid and the second AC power grid.

[0037] The interconnection device includes a three-phase connected commutation chain, a reactor, a first switch K1, a second switch K2, a third switch K3, a fourth switch K4 and an energy supply unit, each phase commutation chain includes M power balancing submodules, M is an integer greater than or equal to 1, wherein: each power balancing submodule includes a first full-bridge circuit H1, a first DC capacitor C1 and a first bridge circuit Q1, and the DC end of the first full-bridge circuit H1, the first DC capacitor C1 and the DC end of the first bridge circuit Q1 are connected in parallel; The first bridge circuit Q1 includes a single-phase full-bridge circuit or a three-phase half-bridge circuit.

[0038] The AC end of the first full-bridge circuit H1 of each interconnected commutation chain is connected in series with the reactor, the first switch K3, and the second switch K4 to form a series branch, one end of the series branch is connected to the first AC power grid, and the other end is connected to the second AC power grid. Figure 1 A1, B1, C1; the other end is connected to the second AC grid, such as Figure 1 A2, B2, C2.

[0039] The AC end of the first bridge circuit Q1 of each interconnected commutation chain is connected in series with the energy supply unit 3 and the third switch K3 to form a first parallel branch, and the first parallel branch is connected to the first AC power grid; The AC end of the first bridge circuit of each interconnected commutation chain is connected in series with the energy supply unit and the fourth switch K4 to form a second parallel branch, and the second parallel branch is connected to the second AC power grid.

[0040] The first full-bridge circuit H1 includes four groups of power semiconductor devices.

[0041] The energy supply unit 3 includes at least one multi-winding transformer T1, the primary side of the multi-winding transformer T1 is connected to the AC power supply, and the secondary side of the multi-winding transformer T1 is connected to the AC end of the first bridge circuit Q1 of each interconnected commutation chain 1; the total number of secondary sides of the multi-winding transformer T1 is 3M.

[0042] Taking M=8 as an example, each interconnected commutation chain includes 8 power balancing sub-modules, and the three interconnected commutation chains include a total of 24 power balancing sub-modules. The energy supply unit includes a multi-winding transformer. The number of secondary windings of the multi-winding transformer is consistent with the number of power balancing sub-modules, which is also 24. The 24 independent secondary windings provide energy for the power balancing sub-module.

[0043] The energy supply unit includes 3M isolation conversion units, each of which is connected to a power balancing submodule. The isolation conversion unit includes a high-frequency transformer T2, a second bridge circuit Q2 and a second DC capacitor C2. The primary side of the high-frequency transformer T2 is connected to the AC end of the first bridge circuit Q1, the secondary side is connected to the AC end of the second bridge circuit Q2, and the DC end of the second bridge circuit Q2 is connected in parallel with the second DC capacitor C2. The energy supply unit also includes at least one low-voltage DC power supply, each low-voltage DC power supply includes a step-down transformer T3 and a rectifier bridge. The primary side of the step-down transformer T3 of each low-voltage DC power supply of the rectifier bridge is connected to the AC power supply, the secondary side is connected to the AC input end of the rectifier bridge, and the DC output end of the rectifier bridge is connected in parallel with the second DC capacitor C2 of each isolation conversion unit.

[0044] There is a mechanical interlock, electrical interlock or software interlock logic between the third switch K3 and the fourth switch K4, and the two are not allowed to be closed at the same time.

[0045] The power balancing submodule also includes a bypass switch K5 and a submodule control unit. The bypass switch K5 is connected in parallel with the AC side of the power balancing submodule to protect the submodule. The submodule control unit is started when the DC voltage of the first DC capacitor C1 is higher than the first starting threshold. It has the functions of monitoring the state of the power balancing submodule, controlling the power semiconductor devices of the first full-bridge circuit H1 and the first bridge circuit Q1, and controlling the closing of the bypass switch K5. Example

[0046] The interconnection device is an electrical device used to connect the first parallel branch and the second parallel branch to achieve control of the DC voltage. The device includes a third switch and a fourth switch, and is equipped with a three-phase interconnected commutation chain and an energy supply unit, wherein the three-phase interconnected commutation chain is composed of a plurality of power balancing submodules.

[0047] Connection method: First, the first parallel branch needs to be connected to the second parallel branch. This can be achieved by using suitable wires and connectors. It is very important to ensure that the connection is stable and safe to avoid problems such as current leakage or short circuit.

[0048] Starting threshold: After the connection is completed, it is necessary to ensure that the DC voltage of the first DC capacitor is higher than the first startup threshold. This means that the circuit parameters need to be adjusted or other appropriate control methods need to be used to achieve this. Ensuring that the DC voltage is high enough is the key to ensuring the normal operation of the device.

[0049] Power Balance: The three-phase interconnected commutation chain of the interconnected device includes multiple power balancing submodules. The function of these submodules is to balance the three-phase current and ensure that the current is evenly distributed in each branch, thereby improving the stability and efficiency of the system. Power balance can be achieved by properly configuring and controlling these submodules.

[0050] Energy supply unit: The energy supply unit is a key component of the interconnected device, which provides the required electrical energy to drive the entire system. The energy supply unit can adopt different designs and technologies, such as batteries, solar panels or other energy converters. It is very important to ensure that the energy supply unit can stably and reliably provide the required energy to the system. Example

[0051] Start the energy supply unit and charge it: The interconnection device is a device for controlling DC voltage, which includes a power balancing submodule and an energy supply unit.

[0052] First, consider the case where the energy supply unit is a multi-winding transformer. In this case, the energy supply unit can be started and automatic excitation can be achieved by closing the third switch or the fourth switch. The starting process is as follows: Make sure all connections are strong and secure.

[0053] The third switch or the fourth switch is closed, so that the multi-winding transformer in the energy supply unit starts to work.

[0054] The multi-winding transformer starts outputting AC voltage, which is converted into DC voltage by a rectifier.

[0055] After passing through the filter, the DC voltage is supplied to the first DC capacitor in the interconnection device.

[0056] The first DC capacitor starts to charge and the DC voltage gradually rises.

[0057] Next, consider the case where the energy supply unit is an isolation unit connected in series with a low-voltage DC power supply. The startup process is as follows: Make sure all connections are strong and secure.

[0058] First, the rectifier bridge in the low-voltage DC power supply is unlocked so that the DC voltage of the second DC capacitor is higher than the second starting threshold.

[0059] Unlock the second bridge circuit in the isolation unit to complete the startup of the energy supply unit.

[0060] The isolation unit starts to work and transmits the DC voltage output by the low-voltage DC power supply to the first DC capacitor in the interconnection device.

[0061] The first DC capacitor starts to charge and the DC voltage gradually rises.

[0062] It should be noted that the specific implementation plan may be adjusted according to different application requirements and technical conditions. In actual operation, it should be strictly operated in accordance with relevant specifications and safety requirements, and ensure that no damage will be caused to equipment and personnel during the startup process. Example

[0063] Figure 3 The electronic device provided in the present application includes a processor and a memory, wherein the memory stores computer instructions. When the computer instructions are executed by the processor, the processor executes the computer instructions to achieve the following Figure 1 The startup method shown.

[0064] The following is a general description of the process, taking the above-mentioned startup method of an interconnected device as an example: System initialization: a. After the electronic equipment is powered on, the system performs initial settings and initialization.

[0065] b. The processor starts running and loads the startup code in the memory.

[0066] Instruction decoding: a. The processor reads computer instructions from memory and decodes them.

[0067] b. The decoded instructions tell the processor what operations should be performed.

[0068] Execute the startup method: a. According to the decoded instruction, the processor executes each step in the startup method of the interconnection device in sequence.

[0069] b. The processor opens or closes the corresponding switch through the control circuit, connects the parallel branch and the series branch, controls the DC voltage, etc.

[0070] Control DC voltage: The processor adjusts the power semiconductor devices in the first bridge circuit so that the DC voltage of the first DC capacitor reaches a preset operating rated value.

[0071] For power transfer: The processor controls the power semiconductor devices in the first full-bridge circuit so that power can be transmitted between the first AC power grid and the second AC power grid.

[0072] Monitoring and feedback: a. The processor continuously monitors the status and various parameters of the interconnected devices.

[0073] b. If necessary, the processor may adjust the operating status of the interconnected device based on the feedback information to ensure its stable and safe operation.

[0074] End operation: After the interconnection device startup method is executed, the processor may execute other subsequent operations or enter other modes.

[0075] The above process is only a rough description, and the actual situation may vary depending on the architecture and functional requirements of the specific electronic device. In addition, the process may also involve steps such as exception handling, error detection and correction to ensure the stability and reliability of the system.

[0076] Please note that the above description is only an example, and the operation process of a specific electronic device may vary depending on actual needs and designs. Example

[0077] A non-transitory computer storage medium stores a computer program. When the computer program is executed by multiple processors, the processors execute the above-mentioned startup method.

[0078] Here is a rough description of the process: Storage media loading: a. After the non-transitory computer storage medium is powered on, the system performs initial settings and loads the computer program in the storage medium.

[0079] b. The computer program in the storage medium is read into the memory or cache for execution by the processor.

[0080] Processor initialization: a. Multiple processors start running and perform initialization operations.

[0081] b. Each processor prepares to execute each step in the control method according to the system instructions.

[0082] Parallel execution: a. Multiple processors start executing different operations or subtasks in the control method at the same time.

[0083] b. Each processor executes a specific sequence of instructions according to the computer program in the storage medium.

[0084] Collaborative work: a. Multiple processors work together and communicate through shared memory or message passing.

[0085] b. The processors exchange information and jointly complete the operations in the control method to achieve overall coordination.

[0086] Monitoring and synchronization: a. The processor continuously monitors the status and progress of the computer program in the storage medium.

[0087] b. The processor may use synchronization mechanisms to ensure the execution order and data consistency between processors as needed.

[0088] Exception handling: a. If an error or abnormal situation occurs during execution, the processor may perform corresponding processing according to the error handling program in the storage medium.

[0089] b. Error handling procedures can include error detection, correction, retry and other mechanisms to ensure the reliability and stability of the system.

[0090] Complete the operation: a. After the execution of the control method is completed, the processor may perform other subsequent operations or enter other modes.

[0091] b. Computer programs in storage media can be reloaded or updated to meet different needs and tasks.

[0092] It should be noted that the specific implementation of non-transient computer storage media may vary depending on technical details and design requirements. In addition, the process may also involve steps such as fault tolerance mechanisms, data backup and recovery to ensure the reliability and durability of the storage media.

[0093] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A method for starting an interconnection device, characterized in that: The following steps are involved: S1. Connecting a first parallel branch and a second parallel branch of an interconnection device so that a DC voltage of the first DC capacitor is higher than a first start-up threshold, wherein the interconnection device comprises a third switch and a fourth switch, wherein the interconnection device comprises a three-phase interconnected commutation chain and an energy supply unit, wherein the three-phase interconnected commutation chain comprises a plurality of power balancing submodules; S2, the power semiconductor device in the first bridge circuit is unlocked and operated, and the DC voltage of the first DC capacitor is controlled to an operating rated value; S3. Connect the series branches, unlock the power semiconductor devices in the first full-bridge circuit and operate to control power transmission between the first AC power grid and the second AC power grid.

2. A method for starting an interconnection device according to claim 1, characterized in that: The step S1 specifically includes the following steps: S1.

1. Close the first switch or the second switch to connect one end of the interconnection device to the first AC power grid or the second AC power grid; S1.

2. Close the third switch or the fourth switch to connect the first parallel branch to the first AC power grid or the second parallel branch to the second AC power grid; S1.3, start the energy supply unit to charge the first DC capacitor; S1.

4. The power balancing submodule includes a bypass switch and a submodule control unit. The bypass switch is connected in parallel to the AC side of the power balancing submodule. When the DC voltage of the first DC capacitor is higher than the first threshold value, the submodule control unit starts to perform self-check on the power balancing submodule.

3. A method for starting an interconnection device according to claim 2, characterized in that: In step S1.4, during the self-check process, if the self-check result indicates that the power balancing submodule is abnormal, the bypass switch is controlled to be closed, and the power balancing submodule status is marked as exit.

4. A method for starting an interconnection device according to claim 3, characterized in that: When the number of power balancing submodules exiting a phase is greater than the preset redundant number, the submodule control unit controls the power semiconductor devices of the first full-bridge circuit and the first bridge circuit to lock, and trips the first switch, the second switch, the third switch and the fourth switch.

5. The method for starting an interconnection device according to claim 1, characterized in that: A mechanical interlock, an electrical interlock, or a software interlock logic is provided between the third switch and the fourth switch, and the third switch and the fourth switch are not allowed to be closed at the same time.

6. The method for starting an interconnected device according to claim 1, characterized in that: The energy supply unit comprises a plurality of multi-winding transformers, the primary sides of the multi-winding transformers are connected to an AC power source, and the secondary sides of the multi-winding transformers are connected to an AC end of a first bridge circuit of a three-phase-connected commutation chain.

7. The method for starting an interconnection device according to claim 5, characterized in that: The energy supply unit includes a plurality of isolation conversion units, each of which is connected to one of the power balancing sub-modules. Each of the isolation conversion units includes a high-frequency transformer, a second bridge circuit and a second DC capacitor. The primary side of the high-frequency transformer is connected to the AC end of the first bridge circuit, the secondary side of the high-frequency transformer is connected to the AC end of the second bridge circuit, and the DC end of the second bridge circuit is connected in parallel with the second DC capacitor.

8. A method for starting an interconnection device according to claim 1, 6 or 7, characterized in that: The energy supply unit also includes a plurality of low-voltage DC power supplies, which include a step-down transformer and a rectifier bridge. The primary side of the step-down transformer is connected to an AC power supply, the secondary side of the step-down transformer is connected to an AC input end of the rectifier bridge, and the DC output end of the rectifier bridge is connected in parallel with the second DC capacitor.

9. An electronic device, characterized in that: The invention comprises a processor and a memory, wherein the processor stores computer instructions, and when the computer instructions are executed by the processor, the computer instructions enable the processor to execute the startup method of the interconnected device according to any one of claims 1 to 8.

10. A storage medium, characterized in that: A computer program is stored, and when the computer program is executed by multiple processors, the processors execute the startup method of the interconnected device according to any one of claims 1 to 8.

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