Power grid maintenance method, system and equipment and storage medium

Abstract

The invention belongs to the field of electric power, and discloses a power grid maintenance method, system and equipment and a storage medium, the power grid maintenance system comprises a main cable, a first synchronizing device, a generator car and a control unit, the main cable is provided with a to-be-maintained node, and a first switch and a second switch arranged at two sides of the to-be-maintained node; the first synchronizing device is connected in parallel with the second switch based on a bypass cable; the method comprises the following steps: connecting a generator car to one side, far away from a to-be-overhauled node, of a second switch on a main cable; under the condition that the first synchronizing device detects the voltage output by the generator car, the first switch and the second switch are controlled to be switched off, and the first synchronizing device is controlled to be kept switched off; in response to a received maintenance completion instruction, the first switch is controlled to be switched on, and the first synchronizing device is controlled to perform synchronizing detection; and under the condition that the detection result of the first synchronizing device meets the switching-on condition, the first synchronizing device is controlled to be switched on, and the second switch is controlled to be switched on.

Description

Technical Field

[0001] This invention belongs to the field of power, and in particular relates to a power grid maintenance method, system, equipment and storage medium. Background Technology

[0002] Synchronization devices are indication, monitoring, and control equipment used in power systems to perform grid connection operations. They primarily detect the voltage amplitude, frequency, and phase differences between the power grids on both sides of the connection point, ensuring the safe parallel connection of generators or power equipment to the grid. Their core functions include parameter detection, synchronization condition judgment, automatic frequency and voltage regulation, and circuit breaker control.

[0003] In power distribution networks, pole-mounted switches generally lack synchronization detection capabilities. Therefore, when a grid fault occurs or scheduled maintenance is needed, temporary power supply to downstream systems via a generator truck requires manual disconnection of the switches on both sides of the fault or maintenance point before maintenance can begin. After maintenance, the switches on both sides of the fault point must be manually closed. Furthermore, before closing the switches, manual equipment is required to determine the voltage and frequency at both ends of the circuit. Otherwise, if the voltage difference is significant, closing the circuit may cause large voltage fluctuations in the grid, potentially damaging the grid or equipment. After closing the circuit, the generator truck is disconnected. This process not only consumes significant manpower and resources and is inefficient, but also requires manual disconnection of the generator truck after maintenance, causing short-term power outages and impacting the user's electricity experience. Summary of the Invention

[0004] In view of this, the present invention discloses a power grid maintenance method, system, equipment and storage medium, which can solve the shortcomings of related technologies.

[0005] To achieve the above objectives, the present invention discloses the following technical solution: According to a first aspect of the present invention, a power grid maintenance method is proposed, applied to a control unit of a power grid maintenance system, the power grid maintenance system comprising: a main cable, a first synchronizing device, a generator vehicle, and a control unit, wherein the main cable has a node to be maintained and a first switch and a second switch disposed on both sides of the node to be maintained, the first synchronizing device being connected in parallel with the second switch based on a bypass cable; the method comprising: Connect the generator car to the main cable and place the second switch away from the node to be inspected; When the first synchronizing device detects the voltage output by the generator, it controls the first switch and the second switch to open, and controls the first synchronizing device to remain open. In response to the received maintenance completion command, the first switch is turned on, and the first synchronizing device is controlled to perform synchronization detection. If the detection result of the first synchronizing device meets the closing conditions, control the first synchronizing device to close and control the second switch to turn on; The first synchronizing device, the generator car, and the main cable are separated.

[0006] According to a second aspect of the present invention, a power grid maintenance device is provided, the system comprising: a main cable, a first synchronizing device, a generator vehicle, and a control unit, wherein a node to be maintained is present on the main cable and a first switch and a second switch are disposed on both sides of the node to be maintained, and the first synchronizing device is connected in parallel with the second switch based on a bypass cable; The control unit is used to control other equipment in the power grid maintenance system; The generator vehicle is used to supply power to other nodes connected to the main cable after being connected to the main cable; The first synchronization device is used to perform synchronization detection on both sides.

[0007] According to a third aspect of the present invention, an electronic device is provided, comprising: processor; Memory used to store processor-executable instructions; The processor implements the steps of the method as described in the first aspect by running the executable instructions.

[0008] According to a fourth aspect of the invention, a computer-readable storage medium is provided having computer instructions stored thereon that, when executed by a processor, implement the steps of the method as described in the first aspect.

[0009] As can be seen from the above technical solutions, the power grid maintenance method disclosed in this invention is as follows: On the one hand, by connecting to the first synchronizing device through a bypass cable, and performing synchronization testing based on the device after maintenance, the main cable will not be damaged by the large difference in voltage and frequency at both ends of the switch. On the other hand, the power grid maintenance system, through a generator truck, maintains continuous power supply to all nodes except the node to be maintained during the maintenance process without human intervention, which not only improves the user's power experience but also improves maintenance efficiency. Attached Figure Description

[0010] Figure 1 This is a framework diagram of a power grid maintenance system provided in an exemplary embodiment; Figure 2 This is a flowchart of a power grid maintenance method provided in an exemplary embodiment; Figure 3 This is a schematic diagram of a synchronization device provided in an exemplary embodiment; Figure 4This is a logic diagram of parameter adjustment provided in an exemplary embodiment; Figure 5 This is a flowchart illustrating a generator vehicle connected to the grid, provided as an exemplary embodiment. Figure 6 This is a framework diagram of another power grid maintenance system provided in an exemplary embodiment; Figure 7 This is a flowchart illustrating another grid connection process for a generator vehicle, as provided in an exemplary embodiment. Figure 8 This is a schematic structural diagram of a device provided in an exemplary embodiment; Figure 9 This is a block diagram of a power grid maintenance device provided in an exemplary embodiment. Detailed Implementation

[0011] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with one or more embodiments of the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of one or more embodiments of the present invention as detailed in the appended claims.

[0012] It should be noted that the steps of the corresponding methods in other embodiments are not necessarily performed in the order shown and described in this invention. In some other embodiments, the methods may include more or fewer steps than those described in this invention. Furthermore, a single step described in this invention may be broken down into multiple steps in other embodiments; and multiple steps described in this invention may be combined into a single step in other embodiments.

[0013] Synchronization devices are indication, monitoring, and control equipment used in power systems to perform grid connection operations. They primarily detect the voltage amplitude, frequency, and phase differences between the power grids on both sides of the connection point, ensuring the safe parallel connection of generators or power equipment to the grid. Their core functions include parameter detection, synchronization condition judgment, automatic frequency and voltage regulation, and circuit breaker control.

[0014] In power distribution networks, pole-mounted switches generally lack synchronization detection capabilities. Therefore, when a grid fault occurs or scheduled maintenance is needed, temporary power supply to downstream systems via a generator truck requires manual disconnection of the switches on both sides of the fault or maintenance point before maintenance can begin. After maintenance, the switches on both sides of the fault point must be manually closed. Furthermore, before closing the switches, manual equipment is required to determine the voltage and frequency at both ends of the circuit. Otherwise, if the voltage difference is significant, closing the circuit may cause large voltage fluctuations in the grid, potentially damaging the grid or equipment. After closing the circuit, the generator truck is disconnected. This process not only consumes significant manpower and resources and is inefficient, but also requires manual disconnection of the generator truck after maintenance, causing short-term power outages and impacting the user's electricity experience.

[0015] To address the shortcomings of related technologies, this invention proposes a power grid maintenance method.

[0016] Figure 1 This is a framework diagram of a power grid maintenance system provided in an exemplary embodiment. (See diagram below.) Figure 1 As shown, the power grid maintenance system includes a main cable 10, a first synchronizing device, a generator trolley 20, and a control unit. The main cable 10 has nodes 101, 102, and 103 to be maintained, and a first switch K1 and a second switch K2 are located on both sides of node 101. The first synchronizing device is connected in parallel with the second switch K2 via a bypass cable. The control unit controls other equipment in the power grid maintenance system; the generator trolley supplies power to other nodes connected to the main cable after it is connected; and the first synchronizing device performs synchronization detection on both sides of the node.

[0017] Figure 2 This is a flowchart illustrating a power grid maintenance method as provided in an exemplary embodiment. (For example...) Figure 2 As shown, this method can be applied to, for example Figure 2 The control unit of the power grid maintenance system shown may include the following steps: Step 201: Connect the generator vehicle to the main cable and place the second switch on the side away from the node to be inspected; Step 202: When the first synchronizing device detects the voltage output by the generator car, it controls the first switch and the second switch to open, and controls the first synchronizing device to remain open. Step 203: In response to the received maintenance completion command, control the first switch to turn on and control the first synchronization device to perform synchronization detection; Step 204: If the detection result of the first synchronizing device meets the closing conditions, control the first synchronizing device to close and control the second switch to turn on; Step 205: Control the first synchronizing device, the generator car, and the main cable to separate.

[0018] In this embodiment, on the one hand, a first synchronizing device is connected through a bypass cable, and the synchronizing device is used to perform synchronization detection after maintenance is completed, so that the main cable will not damage the power grid or equipment due to large differences in voltage and frequency at both ends of the switch; on the other hand, the power grid maintenance system maintains continuous power supply to all nodes except the node to be maintained during the maintenance process through a generator truck, without any human intervention, which not only improves the user's power experience, but also improves maintenance efficiency.

[0019] In one embodiment, the first synchronization device includes a processor, a frequency sampling circuit, a voltage sampling circuit, a switching module, a communication module, and a power grid interface; the processor is part of the control unit and is used to receive and send signals and control the first synchronization device; the frequency sampling circuit is used to monitor the frequencies on both sides of the first synchronization device; the voltage sampling circuit is used to monitor the voltages on both sides of the first synchronization device; the switching module is controlled by the processor and is used to perform on / off operations on the two power grid interfaces; the communication module consists of wireless communication equipment and is used for communication; the power grid interface is used to connect to the main cable or a generator vehicle.

[0020] like Figure 3 As shown, the synchronizing device includes a processor, a frequency detection module, a voltage detection module, a switching module, a communication module, and a power grid interface. The processor is a central processing unit, typically a CPU, that receives and sends signals to control the device in real time. The frequency detection module consists of a frequency sampling circuit that monitors the power grid frequency in real time. The voltage detection module consists of a voltage sampling circuit that monitors the power grid voltage in real time. The switching module is controlled by the processor to turn the two power grid interfaces on and off. The communication module consists of wireless communication devices (such as Wi-Fi or Bluetooth) that communicate with different devices. The power grid interface is used to connect to the power grid or a temporary generator vehicle.

[0021] The two ends of the power grid switch are connected to power grid interface 1 and power grid interface 2 respectively. The device detects the voltage and frequency of the power grid and feeds the data back to the processor. The processor can directly control the opening and closing modules and can also communicate remotely with external devices through the communication module.

[0022] Furthermore, controlling the first synchronizing device to perform synchronization detection includes: acquiring the frequencies on both sides of the first synchronizing device monitored by the frequency sampling circuit and the voltages on both sides of the first synchronizing device monitored by the voltage sampling circuit, and determining that the detection result of the first synchronizing device meets the closing conditions when the frequency difference and voltage difference on both sides of the first synchronizing device meet the set threshold.

[0023] Specifically, such as Figure 4 As shown, the frequency difference threshold is F, the voltage difference threshold is V, and the frequencies at both ends of the acquisition device are f1 (fault side, i.e., the side closer to the node to be inspected) and f2 (load side, i.e., the side closer to the generator car); the voltage amplitudes are v1 (fault side) and v2 (load side).

[0024] Based on the collected voltage amplitude and frequency, there are the following 9 possibilities: 1. The voltage difference and frequency difference on both sides of the device meet the set values, and the closing conditions are met at this time; 2. The voltage difference between the two sides of the device meets the set value, but the frequency difference does not meet the set value, and the amplitude on the fault side is greater than that on the generator side. At this time, the frequency is too low. 3. The voltage difference between the two sides of the device meets the set value, but the frequency difference does not meet the set value, and the amplitude on the fault side is less than that on the generator side, indicating that the frequency is too high. 4. The frequency difference between the two sides of the device meets the set value, but the voltage difference does not meet the set value, and the amplitude on the fault side is greater than the amplitude on the generator side. At this time, the amplitude is too small. 5. The frequency difference between the two sides of the device meets the set value, but the voltage difference does not meet the set value, and the amplitude on the fault side is less than the amplitude on the generator side. At this time, the amplitude is too large. 6. The frequency difference and voltage difference on both sides of the device do not meet the set values, and the frequency and amplitude on the fault side are greater than those on the generator side. At this time, the frequency and amplitude are both too small. 7. The frequency difference and voltage difference on both sides of the device do not meet the set values, and the frequency and amplitude on the fault side are both less than the frequency and amplitude on the generator side. At this time, the frequency and amplitude are both too large. 8. The frequency difference and voltage difference on both sides of the device do not meet the set values, and the frequency on the fault side is greater than the frequency on the generator side, while the amplitude on the fault side is less than the amplitude on the generator side. At this time, the frequency is too high and the amplitude is too low. 9. The frequency difference and voltage difference on both sides of the device do not meet the set values, and the frequency on the fault side is less than the frequency on the generator side, while the amplitude on the fault side is greater than the amplitude on the generator side. At this time, the frequency is too small and the amplitude is too large.

[0025] In one embodiment, the method further includes: if the detection result of the first synchronizing device does not meet the closing conditions, adjusting the electrical parameters of the main cable based on the detection result of the first synchronizing device until the detection result of the first synchronizing device meets the closing conditions; wherein the electrical parameters include at least one of the following: voltage, frequency, phase sequence, phase angle, and waveform. Only voltage and frequency have been described above; the detection procedures for phase sequence, phase angle, waveform, etc., are similar to those for voltage and frequency, and will not be repeated here.

[0026] like Figure 1As shown, in actual maintenance operations, generator trucks generally lack synchronous testing capabilities, necessitating a connection to the main cable via a bypass cable. Due to factors such as narrow roads and fishponds, generator trucks may be unable to reach the work site, requiring the laying of a 10kV bypass cable system hundreds of meters long. This system requires multiple cables and bypass joints. The bypass cable system has numerous connection points and is greatly affected by terrain and weather conditions. The bypass cables must be protected within insulated shields to ensure safety, which not only increases power generation costs but also reduces maintenance efficiency.

[0027] In one embodiment, if the generator vehicle does not have a synchronization detection function, such as Figure 1 As shown, the power grid maintenance system also includes a second synchronizing device installed between the main cable and the generator vehicle. The method further includes: controlling the second synchronizing device to perform synchronization detection, and controlling the second synchronizing device to close when the detection result of the second synchronizing device meets the grid connection conditions.

[0028] like Figure 5 As shown, the bypass synchronizing intelligent interactive device B (the second synchronizing device) detects whether the voltage, frequency, phase sequence, phase angle, and waveform parameters of the generator are consistent with or synchronized with the power grid. This avoids serious consequences such as damage to equipment due to excessive voltage deviation and inrush current (circulating current). When the grid connection conditions are met, the second synchronizing device closes the circuit breaker through logic judgment, while the bypass synchronizing intelligent interactive device A (the first synchronizing device) detects the voltage on the load side and remains open, disconnecting switches K1 and K2. At this time, the faulty area of ​​the power grid loses power, and maintenance of the node to be maintained begins.

[0029] In one embodiment, when the generator vehicle has a synchronization detection function, that is, the generator vehicle itself can detect whether the voltage and frequency are synchronized with the main cable, no additional synchronization device is required. Figure 6 As shown, after connecting the generator car to the main cable, the method further includes: controlling the generator car to perform synchronization testing, and controlling the circuit breaker of the generator car to close when the test result of the generator car meets the grid connection conditions.

[0030] like Figure 7 As shown, when the generator truck is connected to the grid, the generator truck with synchronization maintenance function performs phase verification and synchronization checks (fine-tuning parameters such as voltage, frequency, phase sequence, phase angle, and waveform). When the grid connection conditions are met, the circuit breaker on the generator truck closes. The first synchronizing device detects the voltage on the load side, keeps the circuit breaker open, and the sectionalizing switches K1 and K2 open. At this time, the grid fault area loses power, and maintenance of the grid fault area begins.

[0031] This invention employs a self-locking, quick-release cable connector that connects to the generator output interface. Once the cable is fully inserted and in contact, the connector automatically locks the cable, preventing it from being pulled out. The cable can only be removed after manual unlocking. Manual unlocking automatically releases the clamping force between the cable and the sleeve, allowing for easy separation with one hand. Therefore, it ensures safe, reliable, and convenient cable connection and disconnection.

[0032] Figure 8 This is a schematic structural diagram of a device provided in an exemplary embodiment. Please refer to... Figure 8 At the hardware level, the device includes a processor 802, an internal bus 804, a network interface 806, memory 808, and non-volatile memory 810, and may also include other hardware required for its functions. One or more embodiments of the present invention can be implemented in software, for example, the processor 802 reads the corresponding computer program from the non-volatile memory 810 into memory 808 and then runs it. Of course, in addition to software implementation, one or more embodiments of the present invention do not exclude other implementation methods, such as logic devices or a combination of hardware and software, etc. That is to say, the execution subject of the following processing flow is not limited to each logic unit, but can also be hardware or logic devices.

[0033] Please refer to Figure 9 A control device for a power grid maintenance system can be applied to, for example... Figure 9 The device shown, in order to implement the technical solution of the present invention, includes: Connection unit 901 is used to connect the generator car to the side of the main cable away from the node to be inspected; The tripping unit 902 is used to control the first switch and the second switch to open when the first synchronizing device detects the voltage output by the generator car, and to control the first synchronizing device to remain open. The first detection unit 903 is used to respond to the received maintenance completion command, control the first switch to be turned on, and control the first synchronization device to perform synchronization detection. The closing unit 904 is used to control the first synchronizing device to close and control the second switch to turn on when the detection result of the first synchronizing device meets the closing conditions. The separation unit 905 is used to control the separation of the first synchronizing device, the generator car and the main cable.

[0034] Optionally, the first synchronization device includes a processor, a frequency sampling circuit, a voltage sampling circuit, a switching module, a communication module, and a power grid interface; The processor is part of the control unit and is used to receive transmitted signals and control the first synchronization device. The frequency sampling circuit is used to monitor the frequencies on both sides of the first synchronization device; The voltage sampling circuit is used to monitor the voltage on both sides of the first synchronization device; The switching module is controlled by the processor and is used to perform on / off operations on the two power grid interfaces; The communication module consists of a wireless communication device and is used for communication. The power grid interface is used to connect the main power cable or the generator vehicle.

[0035] Optionally, the first detection unit 903 is specifically used for: The frequency on both sides of the first synchronizing device is acquired by the frequency sampling circuit, and the voltage on both sides of the first synchronizing device is acquired by the voltage sampling circuit. If the frequency difference and voltage difference on both sides of the first synchronizing device meet the set threshold, the detection result of the first synchronizing device is determined to meet the closing condition.

[0036] Optionally, the device further includes: The adjustment unit 906 is used to adjust the electrical parameters of the main cable based on the detection results of the first synchronizing device when the detection results of the first synchronizing device do not meet the closing conditions, until the detection results of the first synchronizing device meet the closing conditions; wherein the electrical parameters include at least one of the following: voltage, frequency, phase sequence, phase angle, and waveform.

[0037] Optionally, if the generator car has a synchronization detection function, after the generator car is connected to the main cable, the device further includes: The second detection unit 907 is used to control the generator car to perform synchronous detection, and to control the circuit breaker of the generator car to close when the detection result of the generator car meets the grid connection conditions.

[0038] Optionally, if the generator car does not have a synchronization detection function, the power grid maintenance system further includes a second synchronization device installed between the main cable and the generator car, the device further including: The third detection unit 908 is used to control the second synchronizing device to perform synchronization detection, and to control the second synchronizing device to close the circuit when the detection result of the second synchronizing device meets the grid connection conditions.

[0039] The systems, devices, modules, or units described in the above embodiments can be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer, which can take the form of a personal computer, laptop computer, cellular phone, camera phone, smartphone, personal digital assistant, media player, navigation device, email sending and receiving device, game console, tablet computer, wearable device, or any combination of these devices.

[0040] In a typical configuration, a computer includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0041] Memory may include non-persistent storage in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0042] Computer-readable media, including both permanent and non-permanent, removable and non-removable media, can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, disk storage, quantum memory, graphene-based storage media or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0043] For any other form of computer-readable medium (or computer-readable storage medium) as described above, computer instructions may be stored thereon, which, when executed by a processor, implement one or more of the above embodiments, thereby realizing the technical solution of the present invention.

[0044] The present invention also proposes a computer program that, when executed by a processor, implements one or more of the embodiments described above, thereby realizing the technical solution of the present invention. This computer program may be specifically recorded on the above-described or other computer-readable media, and the present invention does not impose any limitations on this.

[0045] It should also be noted that 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. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0046] The foregoing has described specific embodiments of the invention. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired results. Furthermore, the processes depicted in the drawings do not necessarily require the specific or sequential order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0047] The terminology used in one or more embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” used in one or more embodiments of the invention and in the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0048] It should be understood that although the terms first, second, third, etc., may be used to describe various information in one or more embodiments of the present invention, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of one or more embodiments of the present invention, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to a determination."

[0049] The above description is merely a preferred embodiment of one or more embodiments of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments of the present invention should be included within the protection scope of one or more embodiments of the present invention.

Claims

1. A power grid maintenance method, characterized in that, A control unit is applied to a power grid maintenance system, the power grid maintenance system including: a main cable, a first synchronizing device, a generator vehicle, and a control unit. The main cable has a node to be maintained and a first switch and a second switch disposed on both sides of the node to be maintained. The first synchronizing device is connected in parallel with the second switch based on a bypass cable. The method includes: Connect the generator car to the main cable and place the second switch away from the node to be inspected; When the first synchronizing device detects the voltage output by the generator, it controls the first switch and the second switch to open, and controls the first synchronizing device to remain open. In response to the received maintenance completion command, the first switch is turned on, and the first synchronizing device is controlled to perform synchronization detection. If the detection result of the first synchronizing device meets the closing conditions, control the first synchronizing device to close and control the second switch to turn on; The first synchronizing device, the generator car, and the main cable are separated.

2. The method according to claim 1, characterized in that, The first synchronization device includes a processor, a frequency sampling circuit, a voltage sampling circuit, a switching module, a communication module, and a power grid interface; The processor is part of the control unit and is used to receive transmitted signals and control the first synchronization device. The frequency sampling circuit is used to monitor the frequencies on both sides of the first synchronization device; The voltage sampling circuit is used to monitor the voltage on both sides of the first synchronization device; The switching module is controlled by the processor and is used to perform on / off operations on the two power grid interfaces; The communication module consists of a wireless communication device and is used for communication. The power grid interface is used to connect the main power cable or the generator vehicle.

3. The method according to claim 2, characterized in that, The control of the first synchronization device to perform synchronization detection includes: The frequency on both sides of the first synchronizing device is acquired by the frequency sampling circuit, and the voltage on both sides of the first synchronizing device is acquired by the voltage sampling circuit. If the frequency difference and voltage difference on both sides of the first synchronizing device meet the set threshold, the detection result of the first synchronizing device is determined to meet the closing condition.

4. The method according to claim 1, characterized in that, The method further includes: If the detection result of the first synchronizing device does not meet the closing conditions, the electrical parameters of the main cable are adjusted based on the detection result of the first synchronizing device until the detection result of the first synchronizing device meets the closing conditions; wherein, the electrical parameters include at least one of the following: voltage, frequency, phase sequence, phase angle, and waveform.

5. The method according to claim 1, characterized in that, If the generator vehicle has a synchronization detection function, after connecting the generator vehicle to the main cable, the method further includes: The generator car is controlled to perform synchronous testing, and if the test results of the generator car meet the grid connection conditions, the circuit breaker of the generator car is controlled to close.

6. The method according to claim 1, characterized in that, In the absence of synchronization detection function in the generator car, the power grid maintenance system further includes a second synchronization device installed between the main cable and the generator car, and the method further includes: Control the second synchronizing device to perform synchronization detection, and control the second synchronizing device to close the circuit when the detection result of the second synchronizing device meets the grid connection conditions.

7. A power grid maintenance system, characterized in that, The system includes: a main cable, a first synchronizing device, a generator car, and a control unit. The main cable has a node to be inspected and a first switch and a second switch set on both sides of the node to be inspected. The first synchronizing device is connected in parallel with the second switch based on a bypass cable. The control unit is used to control other equipment in the power grid maintenance system; The generator vehicle is used to supply power to other nodes connected to the main cable after being connected to the main cable; The first synchronization device is used to perform synchronization detection on both sides.

8. The system according to claim 7, characterized in that, The control unit is used for: Connect the generator car to the main cable and place the second switch away from the node to be inspected; When the first synchronizing device detects the voltage output by the generator, it controls the first switch and the second switch to open, and controls the first synchronizing device to remain open. In response to the received maintenance completion command, the first switch is turned on, and the first synchronizing device is controlled to perform synchronization detection. If the detection result of the first synchronizing device meets the closing conditions, control the first synchronizing device to close and control the second switch to turn on; The first synchronizing device, the generator car, and the main cable are separated.

9. An electronic device, characterized in that, include: processor; Memory used to store processor-executable instructions; The processor implements the steps of the method as described in any one of claims 1-6 by running the executable instructions.

10. A computer-readable storage medium storing computer instructions thereon, characterized in that, When executed by the processor, this instruction implements the steps of the method as described in any one of claims 1-6.

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