Uninterruptible grid-connected switching device and method of operation, control system, storage medium

Abstract

This invention discloses an uninterruptible power supply (UPS) switchgear, its operation method, control system, and storage medium. The system includes: a monitoring module acquiring the electrical parameters of a sampled power supply as maintenance reference parameters; closing the load switch; controlling the generator module to output generator power; the monitoring module modulating control commands according to the maintenance reference parameters and outputting them to an output adjustment module; the output adjustment module adjusting the generator power supply so that its electrical parameters approach the maintenance reference parameters; the monitoring module acquiring the electrical parameters of the sampled power supply, and outputting disassembly permission information when the jumper node voltage difference is less than the disassembly voltage difference threshold, indicating that the jumper node can be disassembled; after the jumper node is disassembled, the circuit breaker is first opened, and then the load switch is opened. This design achieves uninterrupted power supply maintenance, ensuring reliable maintenance and guaranteeing users' power needs.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and in particular to an uninterruptible power grid connection switch device, its operation method, control system, and storage medium. Background Technology

[0002] During long-term operation, power distribution lines require regular maintenance. The first end of the transmission line is connected to the power supply bus via a circuit breaker, and the second end is connected to the power cable, which then transmits electrical energy to each household.

[0003] During maintenance, the circuit breaker needs to be disconnected first. Then, according to the actual needs, the jumper node on the power cable is selected, the jumper node is disassembled, and the generator is connected to the end of the jumper node. The generator then supplies power to the end of the power cable connected to the end of the jumper node.

[0004] Therefore, although the generator can supply power to the power cables during maintenance, the power still needs to be cut off when disconnecting the jumper nodes, and users will experience a power outage, which will cause inconvenience to their normal power use. Summary of the Invention

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an uninterruptible power supply (UPS) switchgear and its operating method, control system, and storage medium, enabling uninterrupted maintenance, reliable maintenance operations, and ensuring users' power needs are met.

[0006] According to a first aspect of the present invention, an uninterruptible power supply (UPS) switchgear includes: a generator module, including a generator body and an output adjustment module, the output adjustment module being connected to the generator body to adjust the electrical parameters of the generator power supply output by the generator body, wherein the electrical parameters of the generator power supply include one or more of phase sequence, line voltage, phase voltage, and frequency; a power connection module, including a first clamp and a second clamp; a monitoring module, the first end of which is connected to the first clamp, and the last end of which is connected to the second clamp and the output terminal of the generator body, the monitoring module being used to detect the electrical parameters of the sampled power supply on the first clamp and the second clamp; a load switch, the first end of which is connected to the first clamp, and the last end of which is connected to the second clamp; the operation method of the UPS switchgear includes a maintenance access step, the maintenance access step including: Connect the first clamp to the beginning of the jumper node and the second clamp to the end of the jumper node. The beginning of the jumper node is connected to the transmission line, which is equipped with a circuit breaker and connected to the power grid's busbar via the circuit breaker. The monitoring module acquires the electrical parameters of the sampled power supply at this time as maintenance reference electrical parameters. The load switch is closed. The generator module is controlled to output generator power. The monitoring module modulates the control command according to the maintenance reference electrical parameters and outputs it to the output regulation module. The output regulation module adjusts the generator power supply. The system aims to make the electrical parameters of the generator power supply approach the maintenance reference electrical parameters, where the line voltage of the generator power supply is higher than the line voltage in the maintenance reference electrical parameters. The monitoring module acquires the electrical parameters of the sampled power supply at this time, and calculates the voltage difference between the jumper nodes between the first and second clamps based on the electrical parameters of the sampled power supply. When the voltage difference between the jumper nodes is less than the disassembly voltage difference threshold, it outputs disassembly permission information, which indicates that the jumper node can be disassembled and disconnected. After the jumper node is disassembled and disconnected, the circuit breaker is first controlled to open, and then the load switch is opened.

[0007] The uninterruptible power grid connection switch device according to embodiments of the present invention has at least the following beneficial effects: This invention relates to an uninterruptible power supply (UPS) switch device. A first clamp and a second clamp are connected to the two ends of a jumper node on the power cable. A monitoring module acquires the electrical parameters of the sampled power supply at this time. These parameters characterize the power supply status of the grid. The load switch is closed, and the monitoring module controls the output regulation module to adjust the generator power supply parameters so that they approach the maintenance reference parameters. This ensures the generator power supply closely matches the grid's power supply status. Simultaneously, considering that the transmission line is under maintenance and power transmission may be unstable, the line voltage of the generator power supply is set higher than the maintenance reference voltage. The line voltage in the electrical parameters is supplied to the grid by the generator power supply, which makes the voltage difference of the jumper node more stable. Furthermore, a load switch is used, whose on / off state is not controlled by the monitoring module. During jumper node operations, the load switch will not disconnect, ensuring the safety of construction personnel. When the voltage difference of the jumper node is less than the disassembly voltage difference threshold, a disassembly permission message can be output, allowing personnel to disassemble the jumper node. Then, the circuit breaker and load switch are disconnected, and the generator module maintains power supply to the power cables. This design achieves uninterrupted maintenance, reliable maintenance operations, and ensures the user's power needs are met.

[0008] According to some embodiments of the present invention, when the power supply to the power supply bus is restored and the line circuit breaker is closed, the operation method of the uninterruptible grid-connected switch device further includes a maintenance cut-out step, which includes: the monitoring module acquiring the electrical parameters of the sampled power supply on the first clamp at this time as the reference electrical parameters of the power grid; the monitoring module modulating control commands according to the reference electrical parameters of the power grid and outputting them to the output regulating module, the output regulating module regulating the generator power supply so that the electrical parameters of the generator power supply approach the reference electrical parameters of the power grid, wherein the line voltage of the generator power supply approaches the line voltage in the reference electrical parameters of the power grid; closing the load switch; the monitoring module acquiring the electrical parameters of the sampled power supply at this time, and determining the jumper node voltage difference between the first clamp and the second clamp according to the electrical parameters of the sampled power supply, and when the jumper node voltage difference is less than the access voltage difference threshold, outputting access permission information, which is used to indicate that the jumper node can be accessed and closed; after waiting for the jumper node to be accessed and closed, opening the load switch and controlling the generator module to stop outputting the generator power supply.

[0009] According to some embodiments of the present invention, the output regulation module regulates the generator power supply so that the electrical parameters of the generator power supply approach the grid reference electrical parameters, the phase sequence of the generator power supply is equal to the phase sequence in the grid reference electrical parameters, the phase voltage of the generator power supply approaches the phase voltage in the grid reference electrical parameters, and the frequency of the generator power supply approaches the frequency in the grid reference electrical parameters.

[0010] According to some embodiments of the present invention, between the output of the access permission information and the waiting jumper node access closure, the following steps are further included: controlling the frequency of the generator power supply to approach the frequency in the maintenance reference electrical parameters; monitoring the changing trend of the phase difference, wherein the phase difference is the phase difference between the generator power supply and the power grid; and predicting that the phase difference tends to be less than the phase difference threshold based on the changing trend of the phase difference, then controlling the jumper node access closure.

[0011] According to some embodiments of the present invention, controlling the frequency of the generator power supply to approach the frequency in the maintenance reference electrical parameters includes: controlling the rotational speed of the generator body to adjust the frequency of the generator power supply, wherein the frequency of the generator power supply... ,in, denoted as the number of pole pairs of the generator body. This refers to the rotational speed of the generator body.

[0012] According to some embodiments of the present invention, the generator module further includes a generator circuit breaker, and the output terminal of the generator body is connected to the tail end of the monitoring module and the second clamp respectively through the generator circuit breaker. The monitoring module is connected to the controlled terminal of the generator circuit breaker to control the on and off of the generator circuit breaker.

[0013] According to some embodiments of the present invention, the uninterruptible power grid connection switch device further includes a circuit breaker switch, the first end of the circuit breaker switch being connected to the first clamp, the tail end of the circuit breaker switch being connected to the second clamp, and the monitoring module being connected to the controlled end of the circuit breaker switch to control the on / off state of the circuit breaker switch.

[0014] According to an embodiment of the second aspect of the present invention, the operation method includes a maintenance access step, which includes: connecting a first clamp to the beginning of a jumper node and connecting a second clamp to the end of a jumper node, wherein the beginning of the jumper node is connected to a transmission line, a circuit breaker is installed on the transmission line, and the transmission line is connected to the power supply bus of the power grid through the circuit breaker; a monitoring module acquires the electrical parameters of the sampled power supply at this time as maintenance reference electrical parameters; the load switch is closed; the generator module is controlled to output generator power supply, and the monitoring module modulates control commands according to the maintenance reference electrical parameters and outputs them to the output regulation module. The output regulation module adjusts the generator power supply so that its electrical parameters are close to the maintenance reference parameters, where the line voltage of the generator power supply is higher than the line voltage in the maintenance reference parameters. The monitoring module acquires the electrical parameters of the sampled power supply at this time, and calculates the voltage difference between the jumper nodes between the first and second clamps based on the electrical parameters of the sampled power supply. When the jumper node voltage difference is less than the disassembly voltage difference threshold, it outputs disassembly permission information, which indicates that the jumper node can be disassembled and disconnected. After the jumper node is disassembled and disconnected, the circuit breaker is first opened, and then the load switch is opened.

[0015] The operation method according to embodiments of the present invention has at least the following beneficial effects: The operating method of this invention enables uninterrupted power supply maintenance, ensures reliable maintenance work, and guarantees users' power needs.

[0016] According to a third aspect of the present invention, the control system includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the operation method disclosed in any of the above embodiments.

[0017] According to a fourth aspect of the present invention, a computer-readable storage medium stores a computer program, characterized in that, when executed by a processor, the computer program implements the operation method disclosed in any of the above embodiments.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic block diagram of one embodiment of the uninterruptible power grid connection switch device of the present invention; Figure 2 This is a circuit diagram of one embodiment of the uninterruptible grid-connected switch device of the present invention; Figure 3 This is a flowchart of one embodiment of the maintenance access steps of the operation method of the present invention; Figure 4 This is a flowchart of one embodiment of the maintenance cutting-out step of the operation method of the present invention.

[0020] Figure label: Generator module 300; generator body 310; output regulation module 320; generator circuit breaker 330; power connection module 400; first clamp 410; second clamp 420; monitoring module 500; load switch 610; circuit breaker switch 620; power cable 710; jumper node 711; transmission line 720; line circuit breaker 730; power supply busbar 740. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0022] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0023] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than", "less than", "exceeding" are understood to exclude the number itself, and "above", "below", "within" are understood to include the number itself.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0025] like Figures 1 to 4 As shown, the uninterruptible power supply (UPS) according to a first aspect embodiment of the present invention includes a generator module 300, a power connection module 400, a monitoring module 500, and a load switch 610. The generator module 300 includes a generator body 310 and an output regulation module 320. The output regulation module 320 is connected to the generator body 310 to adjust the electrical parameters of the generator power supply output by the generator body 310. The electrical parameters of the generator power supply include one or more of phase sequence, line voltage, phase voltage, and frequency. The power connection module 400 includes a first clamp 410 and a second clamp 420. The first end of the monitoring module 500 is connected to the first clamp 410, and the second end of the monitoring module 500 is connected to the second clamp 420 and the output end of the generator body 310, respectively. The monitoring module 500 is used to detect the electrical parameters of the sampling power supply on the first clamp 410 and the second clamp 420. The first end of the load switch 610 is connected to the first clamp 410, and the second end of the load switch 610 is connected to the second clamp 420.

[0026] The load switch 610 is a switching device used to realize the circuit connection, load and disconnection functions under normal load conditions. It can reliably cut off the rated load current and is suitable for temporary bypass power supply and load transfer maintenance scenarios in the distribution network. The load switch 610 can be operated and triggered by personnel.

[0027] Understandably, in the power grid, the power grid generator sets transmit electrical energy to the power supply bus 740 after being transformed by the transformer. The power supply bus 740 is then connected to the transmission line 720 through the circuit breaker 730 of the distribution cabinet. The transmission line 720 is then connected to the power cable, which transmits electrical energy to each household and supplies power to the user's load. Multiple jumper nodes 711 are arranged along the length of the power cable. During maintenance, any jumper node 711 can be disconnected, and the circuit breaker 730 can be disconnected. This allows maintenance of the transmission line 720 between the circuit breaker 730 and the beginning of the disconnected jumper node 711. The power cable 710 at the end of the jumper node 711 can be connected to the generator module 300 for power supply.

[0028] The monitoring module 500 may include various electrical sampling units and control units. The control unit may include processors such as MCU or CPU and their auxiliary circuits. Multiple electrical sampling units may include line voltage detection circuits, phase voltage detection circuits, frequency sampling circuits, phase detection circuits, etc. These electrical sampling units can be set in conventional electrical testing equipment, which will not be described in detail here. The control unit is connected to each electrical sampling unit to obtain the electrical parameters of the sampling power supply, and the control unit can be wirelessly connected to the output adjustment module 320.

[0029] The output regulation module 320 may include a conventional excitation regulator, etc. The excitation regulator changes the induced electromotive force of the stator winding, thereby adjusting the line voltage and phase voltage output by the generator. It can also change the phase sequence by changing the power supply sequence to the stator winding. In addition, it can change the frequency of the generator power supply by changing the power supply frequency to the stator winding.

[0030] The operation method of the uninterruptible power grid-connected switchgear includes maintenance connection steps, such as... Figure 3 As shown, the maintenance access steps include: S110. Connect the first clamp 410 to the beginning of the jumper node 711 and connect the second clamp 420 to the end of the jumper node 711. The beginning of the jumper node 711 is connected to the transmission line 720. The transmission line 720 is equipped with a circuit breaker 730 and is connected to the power supply bus 740 of the power grid through the circuit breaker 730. S120, the monitoring module 500 acquires the electrical parameters of the sampling power supply at this time as a maintenance reference electrical parameter; S130. Close the load switch 610; S140, the control generator module 300 outputs generator power supply, the monitoring module 500 modulates the control command according to the maintenance reference electrical parameters and outputs it to the output adjustment module 320, the output adjustment module 320 adjusts the generator power supply so that the electrical parameters of the generator power supply are close to the maintenance reference electrical parameters, wherein the line voltage of the generator power supply is higher than the line voltage in the maintenance reference electrical parameters. S150, the monitoring module 500 obtains the electrical parameters of the sampling power supply at this time, and calculates the voltage difference of the jumper node 711 between the first clamp 410 and the second clamp 420 based on the electrical parameters of the sampling power supply. When the voltage difference of the jumper node 711 is less than the disassembly voltage difference threshold, the disassembly permission information is output. The disassembly permission information is used to indicate that the jumper node 711 can be disassembled and disconnected. S160. After the jumper node 711 is disconnected, first disconnect the circuit breaker 730, and then disconnect the load switch 610.

[0031] Understandably, when the load switch 610 is closed, the generator power output from the generator module 300 can be applied to both the second clamp 420 and the first clamp 410.

[0032] Specifically, the voltage difference threshold can be set to 2-5% of the generator power supply output voltage, or it can be set to be lower than 12V, 24V, etc. It should be noted that when the load switch 610 is closed, theoretically the voltage difference across the jumper node 711 is equal to 0. However, in reality, due to possible faults in the transmission line 720 requiring maintenance, voltage fluctuations may occur, resulting in a voltage difference across the jumper node 711. The purpose of this invention is to use the line voltage of the generator power supply set to be higher than the line voltage in the maintenance reference electrical parameters, and to ensure that the voltage difference of the jumper node 711 is relatively stable and less than the voltage difference threshold, thereby improving the safety level of uninterrupted wiring for operators.

[0033] This invention provides an uninterruptible power supply (UPS) switch device. The first clamp 410 and the second clamp 420 are connected to the two ends of the jumper node 711 of the power cable 710. The monitoring module 500 acquires the electrical parameters of the sampled power supply at this time. These electrical parameters characterize the power supply status of the grid. The load switch 610 is closed, and the monitoring module 500 controls the output regulation module 320 to adjust the generator power supply so that its electrical parameters approach the maintenance reference parameters, ensuring that the generator power supply is close to the grid's power supply status. Simultaneously, considering that the transmission line 720 is under maintenance and power transmission may be unstable, the line voltage of the generator power supply is set higher than the maintenance reference parameters. The line voltage in the circuit is supplied to the grid by the generator power supply, which makes the voltage difference of jumper node 711 more stable. Furthermore, a load switch 610 is used, whose on / off state is not controlled by the monitoring module 500. During operation of jumper node 711, the load switch 610 will not disconnect, ensuring the safety of construction personnel. When the voltage difference of jumper node 711 is less than the dismantling voltage difference threshold, a dismantling permission message can be output, allowing personnel to dismantle jumper node 711. Then, the circuit breaker 730 and load switch 610 are disconnected, and the generator module 300 maintains power supply to the power cable 710. This design achieves uninterrupted maintenance, reliable maintenance construction, and ensures the user's power needs.

[0034] In some embodiments of the present invention, such as Figure 2As shown, the generator module 300 also includes a generator circuit breaker 330. The output terminal of the generator body 310 is connected to the tail end of the monitoring module 500 and the second clamp 420 through the generator circuit breaker 330. The monitoring module 500 is connected to the controlled end of the generator circuit breaker 330 to control the on / off state of the generator circuit breaker 330.

[0035] Understandably, when the generator module 300 needs to output generator power, the output of the generator body 310 can be modulated first. After the generator power output of the generator body 310 is close to the grid power, the generator circuit breaker 330 is controlled to close, thereby reducing the impact on the grid. Similarly, when it is necessary to stop the generator module 300 from outputting generator power, the generator circuit breaker 330 can be disconnected to prevent the grid from being impacted when the output of the generator body 310 is shut down.

[0036] In some embodiments of the present invention, the uninterruptible power grid connection switch device further includes a circuit breaker switch 620, the first end of the circuit breaker switch 620 being connected to the first clamp 410, the tail end of the circuit breaker switch 620 being connected to the second clamp 420, and the monitoring module 500 being connected to the controlled end of the circuit breaker switch 620 to control the on / off state of the circuit breaker switch 620.

[0037] In some low-voltage boxes, the monitoring module 500 integrates a circuit breaker switch 620. When the monitoring module 500 detects the electrical parameters of the sampling power supply on the first clamp 410 and the second clamp 420, if the electrical parameters of the sampling power supply indicate a fault or fluctuation, the monitoring module 500 will control the circuit breaker switch 620 to open. If the voltage difference between the two ends of the jumper node 711 increases during maintenance, the safety of the personnel cannot be guaranteed. Therefore, this invention can add the load switch 610 to the old-style low-voltage box with the integrated circuit breaker switch 620, and connect the load switch 610 and the circuit breaker module in parallel to reduce costs.

[0038] In some embodiments of the present invention, when power is restored to the power supply bus 740 and the circuit breaker 730 is closed, the operation method of the uninterruptible grid-connected switchgear further includes a maintenance disconnection step, such as... Figure 4 As shown, the repair cutting-out step includes: S210, the monitoring module 500 obtains the electrical parameters of the sampling power supply on the first clamp 410 at this time as the reference electrical parameters of the power grid; S220 and monitoring module 500 modulate and control commands according to the grid reference electrical parameters and output them to output adjustment module 320. Output adjustment module 320 adjusts the generator power supply so that the electrical parameters of the generator power supply are close to the grid reference electrical parameters, wherein the line voltage of the generator power supply is close to the line voltage in the grid reference electrical parameters. S230, Close the load switch 610; S240, the monitoring module 500 obtains the electrical parameters of the sampling power supply at this time, and calculates the voltage difference of the jumper node 711 between the first clamp 410 and the second clamp 420 based on the electrical parameters of the sampling power supply. When the voltage difference of the jumper node 711 is less than the access voltage difference threshold, the access permission information is output. The access permission information is used to indicate that the jumper node 711 can be connected and closed. S250, after waiting for jumper node 711 to be connected and closed, disconnect load switch 610 and control generator module 300 to stop outputting generator power supply.

[0039] After the staff completes the maintenance of transmission line 720, jumper node 711 can be connected and closed. The monitoring module 500 first obtains the electrical parameters of the sampling power supply on the first clamp 410. At this time, the electrical parameters of the grid side can be obtained. According to the grid reference electrical parameters, the generator power supply of generator module 300 is adjusted so that the electrical parameters of generator power supply are close to the grid reference electrical parameters, thus achieving synchronization. It is worth noting that at this time, the fault can be considered to be basically eliminated. Therefore, the line voltage of generator power supply needs to be approximately equal to the line voltage in the grid reference electrical parameters. After the load switch 610 is closed, the generator power supply and the grid power supply jointly supply power to the power cable 710. At the same time, it is necessary to ensure that the voltage difference of stable jumper node 711 is less than the access voltage difference threshold. The staff closes jumper node 711 according to the access permission information, and then disconnects the load switch 610 and controls generator module 300 to stop output.

[0040] In some embodiments of the present invention, the output adjustment module 320 adjusts the generator power supply so that the electrical parameters of the generator power supply approach the grid reference electrical parameters, the phase sequence of the generator power supply is equal to the phase sequence in the grid reference electrical parameters, the phase voltage of the generator power supply approaches the phase voltage in the grid reference electrical parameters, and the frequency of the generator power supply approaches the frequency in the grid reference electrical parameters.

[0041] Among them, phase sequence refers to the phase order of the three-phase alternating current (A→B→C). The phase sequence of the generator power supply must be exactly the same as the phase sequence of the grid power supply, which is the basic condition for grid connection.

[0042] The line voltage of the three phases of the generator power supply should be basically the same as that of the grid power supply. The error between the two can be less than or equal to ±5% (if the line voltage of the grid power supply is 400V, the line voltage of the generator power supply can be between 380V and 420V). At the same time, the voltage difference between the three phases should also be roughly the same, with an error of less than or equal to 2%.

[0043] In some embodiments of the present invention, the following further includes a step between the output of the access permission information and the waiting jumper node 711 access closure: The frequency of the generator power supply is controlled to approximate the frequency in the maintenance reference electrical parameters; Monitor the changing trend of the phase difference, wherein the phase difference is the phase difference between the generator power supply and the power grid; If the phase difference is predicted to be less than the phase difference threshold based on the trend of phase difference change, then the control jumper node 711 is connected to the closure.

[0044] Understandably, even if the phase sequence, line voltage, and phase voltage of the generator power supply and the grid power supply are the same, a different phase difference will still cause fluctuations in the voltage difference at jumper node 711. Therefore, by first controlling the frequencies of the generator power supply and the grid power supply to be approximately the same, the phase difference between the generator power supply and the grid power supply will remain within a controllable range. A slight frequency error will cause the phase difference to change at a constant rate of "slip angle" (e.g., if the generator frequency is slightly higher than the grid frequency, the phase will gradually lead). During grid connection, the frequency of the generator power supply is first adjusted to be close to that of the grid power supply, and the trend of the phase difference is monitored. Then, the frequency is finely adjusted to allow the phase difference to slowly approach 0°. At the instant the phases of the generator power supply and the grid power supply coincide, jumper node 711 is closed.

[0045] Specifically, the frequency at which the frequency of the control generator power supply approaches the frequency in the maintenance reference electrical parameters includes: The speed of the generator body is controlled to adjust the frequency of the generator power supply. ,in, denoted as the number of pole pairs of the generator body. This refers to the rotational speed of the generator body.

[0046] The operation method according to the second aspect of the present invention is applied to the uninterruptible power grid-connected switchgear disclosed in any of the above embodiments.

[0047] The operating method of this invention enables uninterrupted power supply maintenance, ensures reliable maintenance work, and guarantees users' power needs.

[0048] According to a third aspect of the present invention, the control system includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the operation method disclosed in any of the above embodiments.

[0049] The control system can be any intelligent terminal, including a central computer and remote device terminal computers.

[0050] Another embodiment of the hardware structure of the control system may further include: The processor can be implemented using a general-purpose central processing unit (CPU), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to achieve the technical solutions provided in the embodiments of this application. The memory can be implemented in the form of read-only memory (ROM), static storage device, dynamic storage device, or random access memory (RAM). The memory can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory and called by the processor to execute the operation methods of the embodiments of this application. Input / output interfaces are used to implement information input and output; The communication interface is used to enable communication and interaction between this device and other devices. Communication can be achieved through wired means (such as USB, Ethernet cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.). A bus transmits information between various components of a device (such as processors, memory, input / output interfaces, and communication interfaces), and can also be used to access the smart Internet of Things. The processor, memory, input / output interfaces, and communication interfaces communicate with each other within the device via a bus.

[0051] According to a fourth aspect of the present invention, a computer-readable storage medium stores a computer program, characterized in that, when executed by a processor, the computer program implements the operation method disclosed in any of the above embodiments.

[0052] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0053] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0054] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0055] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0056] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0057] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0058] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An uninterruptible power grid connection switchgear, characterized in that, include: A generator module includes a generator body and an output regulation module. The output regulation module is connected to the generator body to adjust the electrical parameters of the generator power supply output by the generator body. The electrical parameters of the generator power supply include one or more of phase sequence, line voltage, phase voltage and frequency. The power connection module includes a first wire clamp and a second wire clamp; The monitoring module has its first end connected to the first clamp and its tail end connected to the second clamp and the output end of the generator body, respectively. The monitoring module is used to detect the electrical parameters of the sampling power supply on the first clamp and the second clamp. A load switch, wherein the first end of the load switch is connected to the first clamp, and the tail end of the load switch is connected to the second clamp; The operation method of the uninterruptible grid-connected switchgear includes a maintenance access step, which includes: The first clamp is connected to the beginning of the jumper node, and the second clamp is connected to the end of the jumper node. The beginning of the jumper node is connected to the transmission line, which is equipped with a circuit breaker. The transmission line is connected to the power supply bus of the power grid through the circuit breaker. The monitoring module acquires the electrical parameters of the sampling power supply at this time as reference electrical parameters for maintenance; Close the load switch; The control module outputs generator power supply. The monitoring module modulates the control command according to the maintenance reference electrical parameters and outputs it to the output adjustment module. The output adjustment module adjusts the generator power supply so that the electrical parameters of the generator power supply are close to the maintenance reference electrical parameters. The line voltage of the generator power supply is higher than the line voltage in the maintenance reference electrical parameters. The monitoring module obtains the electrical parameters of the sampling power supply at this time, and calculates the voltage difference between the jumper nodes between the first clamp and the second clamp based on the electrical parameters of the sampling power supply. When the voltage difference between the jumper nodes is less than the disassembly voltage difference threshold, it outputs disassembly permission information. The disassembly permission information is used to indicate that the jumper node can be disassembled and disconnected. After the jumper node is disconnected, first disconnect the circuit breaker, and then disconnect the load switch.

2. The uninterruptible power grid connection switch device according to claim 1, characterized in that, When power supply to the power bus is restored and the circuit breaker is closed, the operation method of the uninterruptible grid-connected switchgear further includes a maintenance disconnection step, which includes: The monitoring module acquires the electrical parameters of the sampling power supply on the first clamp at this time as reference electrical parameters of the power grid; The monitoring module modulates and controls the power grid reference electrical parameters and outputs the control command to the output regulating module. The output regulating module regulates the generator power supply so that the electrical parameters of the generator power supply are close to the grid reference electrical parameters, wherein the line voltage of the generator power supply is close to the line voltage in the grid reference electrical parameters. Close the load switch; The monitoring module acquires the electrical parameters of the sampling power supply at this time, and calculates the voltage difference between the jumper nodes between the first clamp and the second clamp based on the electrical parameters of the sampling power supply. When the voltage difference between the jumper nodes is less than the access voltage difference threshold, it outputs access permission information. The access permission information is used to indicate that the jumper node can be closed. After the jumper node is closed, disconnect the load switch and control the generator module to stop outputting generator power.

3. The uninterruptible power grid connection switch device according to claim 2, characterized in that, The output adjustment module adjusts the generator power supply so that the electrical parameters of the generator power supply are close to the grid reference electrical parameters, the phase sequence of the generator power supply is equal to the phase sequence in the grid reference electrical parameters, the phase voltage of the generator power supply is close to the phase voltage in the grid reference electrical parameters, and the frequency of the generator power supply is close to the frequency in the grid reference electrical parameters.

4. The uninterruptible power grid connection switch device according to claim 3, characterized in that, Between the output of the access permission information and the waiting jumper node access closure, the following is also included: The frequency of the generator power supply is controlled to approximate the frequency in the maintenance reference electrical parameters; Monitor the changing trend of the phase difference, wherein the phase difference is the phase difference between the generator power supply and the power grid; If the phase difference is predicted to be less than the phase difference threshold based on the trend of phase difference change, then the jumper node is controlled to close.

5. The uninterruptible power grid connection switch device according to claim 4, characterized in that, The frequency at which the control generator power supply frequency approaches the frequency in the maintenance reference electrical parameters includes: The speed of the generator body is controlled to adjust the frequency of the generator power supply. ,in, denoted as the number of pole pairs of the generator body. This refers to the rotational speed of the generator body.

6. The uninterruptible power grid connection switch device according to claim 1, characterized in that, The generator module also includes a generator circuit breaker. The output terminal of the generator body is connected to the tail end of the monitoring module and the second clamp through the generator circuit breaker. The monitoring module is connected to the controlled terminal of the generator circuit breaker to control the on / off state of the generator circuit breaker.

7. The uninterruptible power grid connection switch device according to claim 1, characterized in that, It also includes a circuit breaker switch, the first end of which is connected to the first clamp, the last end of which is connected to the second clamp, and the monitoring module is connected to the controlled end of the circuit breaker switch to control the on / off state of the circuit breaker switch.

8. An operating method, characterized in that, This includes maintenance access steps, which include: Connect the first clamp to the beginning of the jumper node and the second clamp to the end of the jumper node. The beginning of the jumper node is connected to the transmission line, which is equipped with a circuit breaker. The transmission line is connected to the power supply bus of the power grid through the circuit breaker. The monitoring module acquires the electrical parameters of the sampling power supply at this time as reference electrical parameters for maintenance; Close the load switch; The control module outputs generator power supply. The monitoring module modulates the control command according to the maintenance reference electrical parameters and outputs it to the output adjustment module. The output adjustment module adjusts the generator power supply so that the electrical parameters of the generator power supply are close to the maintenance reference electrical parameters. The line voltage of the generator power supply is higher than the line voltage in the maintenance reference electrical parameters. The monitoring module obtains the electrical parameters of the sampling power supply at this time, and calculates the voltage difference between the jumper nodes between the first clamp and the second clamp based on the electrical parameters of the sampling power supply. When the voltage difference between the jumper nodes is less than the disassembly voltage difference threshold, it outputs disassembly permission information. The disassembly permission information is used to indicate that the jumper node can be disassembled and disconnected. After the jumper node is disconnected, first disconnect the circuit breaker, and then disconnect the load switch.

9. A control system, characterized in that, The control system includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the operation method of claim 8.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the operation method of claim 8.

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