Low-voltage line management and control method and system with self-healing function

Abstract

One or more embodiments of the invention relate to the technical field of power Internet of Things application, in particular to a low-voltage line management and control method and system with a self-healing function. The system comprises a state sensing module which is used for obtaining power state parameters of a power distribution network comprising two paths of incoming lines and two sections of buses; the logic judgment module is used for sending a spare power automatic switching execution instruction to the control execution module based on a preset spare power automatic switching starting condition when it is detected that any one of the two sections of buses loses voltage and the dynamic parameters of the power distribution network meet the spare power automatic switching starting condition, so as to execute a spare power automatic switching transfer flow; and the control execution module executes a spare power automatic switching transfer flow according to the spare power automatic switching execution instruction sent by the logic judgment module, and the spare power automatic switching transfer flow comprises the step of sending an operation instruction to each circuit breaker according to a preset sequential control mode when the power distribution network meets the preset sequential control mode so as to automatically switch the operation mode of power supply.

Description

Technical Field

[0001] One or more embodiments of this specification relate to the field of power Internet of Things application technology, and specifically to a low-voltage line control method and system with self-healing function. Background Art

[0002] With the global development of industrialization and the widespread adoption of new energy products, electricity demand continues to grow. Ensuring a stable power supply is a top priority for power management. Distribution systems are primarily divided into medium-voltage and low-voltage (LV) systems. While MV networks are relatively well-established, the reliability of LV distribution is still in its infancy. Daily operations, inspections, and controls in LV distribution rooms are still largely manual, with low levels of automation. This prevents intensive O&M management and poses the risk of power outages. Traditional LV distribution systems rely primarily on manual troubleshooting and manual switching after faults, resulting in long recovery times and the potential for secondary failures due to improper operation. Existing automatic switching devices, such as backup power supply automatic switching devices, typically rely solely on a single circuit breaker status or simple voltage criteria. These automatic switching solutions are ill-suited for the rapid self-healing needs of complex distribution networks. This is particularly true in scenarios involving multi-source coordination and the integration of new energy microgrids. These switching solutions are prone to problems such as erroneous switching or asynchronous closing due to a single criterion, poor coordination due to the difficulty in achieving optimal switching strategies for multi-source coordination, and the vulnerability of the distribution system to false trips caused by disturbances such as voltage sags and short-term fluctuations, resulting in weak immunity. Therefore, there is an urgent need for a low-voltage distribution self-healing management system that reduces human operational errors, has a fast power transfer function, and realizes multi-source collaboration. Summary of the Invention

[0003] The embodiments of this specification provide a low-voltage line control method and system with self-healing function, and the technical solution is as follows:

[0004] In a first aspect, the embodiments of this specification provide a low-voltage line control system with a self-healing function, comprising:

[0005] A state sensing module is used to obtain power state parameters of the distribution network including two incoming lines and two busbars;

[0006] a logic judgment module, based on a preset backup automatic transfer starting condition, sending a backup automatic transfer execution instruction to the control execution module to execute the backup automatic transfer power supply transfer process when detecting that any of the two bus sections has lost voltage and the dynamic parameters of the distribution network meet the backup automatic transfer starting condition;

[0007] The standby automatic start-up conditions include:

[0008] The automatic transfer function switch is in the on position;

[0009] At least one of the two incoming lines has pressure;

[0010] Two of the two low-voltage incoming line switches and busbar tie circuit breakers are in the closed position;

[0011] The springs of the two low-voltage incoming line switches and the busbar connecting circuit breaker have stored energy;

[0012] The control execution module executes the standby automatic transfer process according to the standby automatic transfer execution instruction sent by the logic judgment module. The standby automatic transfer process includes sending operation instructions to each circuit breaker according to the preset sequential control mode when the distribution network meets the preset sequential control mode to automatically switch the power supply operation mode.

[0013] In a second aspect, the embodiments of this specification provide a low-voltage line control method with a self-healing function, including:

[0014] Obtaining power status parameters of a distribution network including two incoming lines and two busbars;

[0015] Based on the preset backup automatic transfer starting conditions, when it is detected that any of the two bus sections loses voltage and the dynamic parameters of the distribution network meet the backup automatic transfer starting conditions, a backup automatic transfer execution instruction is sent to the control execution module to execute the backup automatic transfer power supply process;

[0016] The standby automatic start-up conditions include:

[0017] The automatic transfer function switch is in the on position;

[0018] At least one of the two incoming lines has pressure;

[0019] Two of the two low-voltage incoming line switches and the busbar connecting circuit breaker are in the closed state;

[0020] The springs of the two low-voltage incoming line switches and the busbar connecting circuit breaker have stored energy;

[0021] The standby automatic switching process includes sending operation instructions to each circuit breaker according to the preset sequential control mode when the distribution network meets the preset sequential control mode, so as to automatically switch to the standby bus in the two incoming lines.

[0022] In a third aspect, embodiments of this specification provide an electronic device, including a processor and a memory;

[0023] The processor is connected to the memory;

[0024] The memory is used to store executable program code;

[0025] The processor reads the executable program code stored in the memory to run a program corresponding to the executable program code, so as to execute the method described in any one of the above aspects.

[0026] In a fourth aspect, an embodiment of this specification provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method described in any one of the above aspects is implemented.

[0027] In a fifth aspect, embodiments of this specification provide a computer program product, including a computer program, which implements the method described in any of the above aspects when executed by a processor.

[0028] The beneficial effects of the technical solutions provided by some embodiments of this specification include at least:

[0029] The embodiment of this specification uses a low-voltage power distribution self-healing management system to replace manual operation for standby power supply switching, which has a high degree of automation. It can not only improve the operational efficiency of standby power supply switching, but also reduce the power outage time of users and the circulating current impact time of the device, thereby reducing damage to electrical equipment; in addition, the embodiment of this specification adopts multi-source collaborative judgment criteria to avoid switching failures or misoperations caused by single signal misjudgment, significantly improve the self-healing success rate, and improve power supply reliability; moreover, the embodiment of this specification can shorten the standby power supply switching time through multi-parameter parallel detection and dynamic logic judgment, and is suitable for scenarios with high requirements for power supply continuity such as data centers and hospitals; moreover, the embodiment of this specification avoids power supply miscutting or asynchronous closing by setting a preset sequential control mode, thereby reducing unnecessary switching actions and improving system stability. While ensuring rapid fault recovery, the embodiment of this specification improves the reliability, economy and flexibility of the distribution system, and is suitable for modern smart grids, microgrids and high-reliability power supply scenarios, with significant technical advantages and application value.

[0030] Other features and advantages of the various embodiments of this specification will be further disclosed in the following detailed description and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of this specification, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] Figure 1 This is a schematic diagram of an application scenario of a low-voltage line control system with self-healing function provided in this manual.

[0033] Figure 2 This is a structural diagram of a low-voltage line control system with self-healing function provided in this manual.

[0034] Figure 3This is a structural diagram of a power distribution network provided in this manual.

[0035] Figure 4 This is a schematic diagram of the standby startup conditions provided in this manual.

[0036] Figure 5 This manual provides a schematic diagram of the low-voltage incoming line pressure loss standby switching supply.

[0037] Figure 6 This manual provides a flowchart for determining the preset sequential control mode.

[0038] Figure 7 This is a flow chart of executing the hot dump mode provided in this manual.

[0039] Figure 8 This is a flowchart of executing the cold pour mode provided in this manual.

[0040] Figure 9 This is a flow chart of a low-voltage line control method with self-healing function provided in this manual.

[0041] Figure 10 This is a structural diagram of an electronic device provided in this manual. DETAILED DESCRIPTION

[0042] The following is an explanation and description of the technical solutions of the embodiments of this specification in conjunction with the drawings of the embodiments of this specification. However, the following embodiments are only preferred embodiments of this specification and are not exhaustive. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without making any creative work are all within the scope of protection of this specification.

[0043] Throughout this specification, the claims, and the accompanying drawings, the terms "first," "second," "third," and the like are used to distinguish between different items, not to describe a particular order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed, or may include other steps or elements inherent to the process, method, product, or apparatus.

[0044] In the following description, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate directions or positional relationships are only used to facilitate the description of the embodiments and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limitations on this specification.

[0045] The data involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data comply with the relevant laws, regulations and standards of relevant countries and regions.

[0046] Before describing the low-voltage power distribution self-healing management method in detail in conjunction with one or more embodiments, this specification first introduces the application scenario of the low-voltage power distribution self-healing management method.

[0047] See also Figure 1 , Figure 1 This is a scenario diagram of the low-voltage distribution self-healing management system 100 provided in an embodiment of the present invention. The low-voltage distribution self-healing management system 100 may include a distribution network 110, an Internet of Things collector 120, a low-voltage distribution self-healing management platform 130, etc. The Internet of Things collector 120 can be communicated with the low-voltage distribution self-healing management platform 130.

[0048] In this embodiment, the Internet of Things collector 120 can be set in the distribution network 110 to collect electrical parameters such as voltage, current, power, harmonics, frequency, etc. corresponding to specific locations in the distribution network 110 in real time, and transmit the data to the low-voltage distribution self-healing management platform 130 through Internet of Things communication, thereby providing data support for fault diagnosis, power quality analysis, self-healing management, etc.

[0049] An IoT data collector may include sensors, signal conditioning modules, a controller, a communication module, and power management components. Sensors may include voltage and current acquisition modules, signal conditioning modules, harmonic analysis modules, and frequency measurement modules. The signal conditioning module converts analog sensor signals into digital signals. The controller processes these signals according to pre-set programs or instructions from other systems, executing corresponding operations such as adjusting switches and driving motors. The communication module transmits collected data or control instructions via wired or wireless networks. These networks can be local area networks, wide area networks, or even the internet. The power management component provides a stable power supply for the entire device. IoT data collectors can also be powered by renewable energy sources such as solar energy.

[0050] In this embodiment, the power distribution network 110 can be a power distribution system based on a two-busbar architecture. Each busbar can be connected to a different power source, such as a transformer, generator, utility power, or backup power source. Furthermore, the power distribution network 110 can be configured with a busbar tie breaker to coordinate the two busbar sections to operate in separate, parallel, or backup switching modes.

[0051] The low-voltage power distribution self-healing management platform 130 in this embodiment can be integrated into an electronic device, such as a server or a terminal. The server can be a single server or a server cluster consisting of multiple servers. The terminal can be a mobile phone, tablet computer, smart Bluetooth device, laptop computer, or personal computer (PC).

[0052] In some embodiments, the low-voltage power distribution self-healing management platform 130 can also be integrated into multiple electronic devices. For example, the low-voltage power distribution self-healing management platform 130 can be integrated into multiple servers, and the low-voltage power distribution self-healing management method of this application can be implemented by multiple servers.

[0053] In this embodiment, the low-voltage distribution self-healing management platform 130 may include a state perception module for obtaining the power state parameters of the distribution network including two bus sections; a logic judgment module for sending a standby automatic transfer execution instruction to the control execution module based on a preset standby automatic transfer start-up condition when it is detected that any of the two bus sections loses pressure and the dynamic parameters of the distribution network meet the standby automatic transfer start-up condition to execute the standby automatic transfer transfer process; the standby automatic transfer start-up condition includes: the standby automatic transfer function conversion switch is in the on position; at least one of the two incoming lines has pressure; two of the two low-voltage incoming line switches and busbar interconnecting circuit breakers are in the closed state; the springs of the two low-voltage incoming line switches and busbar interconnecting circuit breakers have stored energy; the control execution module executes the standby automatic transfer transfer process according to the standby automatic transfer execution instruction sent by the logic judgment module, and the standby automatic transfer transfer process includes sending operation instructions to each circuit breaker according to the preset sequential control mode when the distribution network meets the preset sequential control mode to automatically switch the power supply operation mode.

[0054] It should be noted that Figure 1 The scenario diagram of the low-voltage distribution self-healing management system shown is only an example. The low-voltage distribution self-healing management system and the scenario described in the embodiment of the present invention are intended to more clearly illustrate the technical solution of the embodiment of the present invention, and do not constitute a limitation on the technical solution provided by the embodiment of the present invention. Ordinary technicians in this field can know that with the evolution of the low-voltage distribution self-healing management system and the emergence of new scenarios, the technical solution provided by the embodiment of the present invention is also applicable to similar technical problems.

[0055] See also Figure 2 , Figure 2 This is a schematic diagram of the structure of a low-voltage line control system with self-healing function provided in an embodiment of this specification.

[0056] like Figure 2As shown, the low-voltage power distribution self-healing management system may include at least a state perception module 200, a logic judgment module 210, and a control execution module 220, wherein:

[0057] A state sensing module 200 is used to obtain power state parameters of a power distribution network including two incoming lines and two busbars;

[0058] The logic judgment module 210, based on pre-set standby automatic transfer start-up conditions, sends a standby automatic transfer execution instruction to the control execution module to execute the standby automatic transfer power supply transfer process when it is detected that any of the two bus sections has lost voltage and the dynamic parameters of the distribution network meet the standby automatic transfer start-up conditions. The standby automatic transfer start-up conditions include: the standby automatic transfer function switch is in the on position; at least one of the two incoming lines has pressure; two of the two low-voltage incoming line switches and the busbar tie circuit breaker are in the closed state; and the springs of the two low-voltage incoming line switches and the busbar tie circuit breaker are energized.

[0059] The control execution module 220 executes the standby automatic transfer process according to the standby automatic transfer execution instruction sent by the logic judgment module. The standby automatic transfer process includes sending operation instructions to each circuit breaker according to the preset sequential control mode when the distribution network meets the preset sequential control mode to automatically switch the power supply operation mode.

[0060] In this embodiment, the low-voltage distribution self-healing management system can determine whether the line meets the backup automatic start-up conditions based on the acquired power status parameters. If the backup automatic start-up conditions are not met, the backup automatic start-up and power supply transfer process will be stopped. If the backup automatic start-up conditions are met, the low-voltage distribution self-healing management system will record the initial backup automatic start-up switch state and then begin the backup automatic start-up and power supply transfer process. The low-voltage distribution self-healing management system can collect information such as the incoming line voltage, voltage on both sides of the busbar, incoming line current, switch status, and transformer load once a second, and execute the backup automatic start-up and power supply transfer process once a second, ensuring low-voltage busbar power supply when the load allows, thereby reducing power outage duration.

[0061] In this embodiment, power distribution network 110 may be a power distribution system based on a two-busbar architecture. The power status parameters may be electrical parameters such as voltage, current, power, harmonics, and frequency, collected by an IoT collector located in power distribution network 110 via a voltage acquisition module, a current acquisition module, a signal conditioning module, a harmonic analysis module, and a frequency measurement module.

[0062] In some embodiments, see Figure 3 , Figure 3 This is a schematic diagram of the structure of the power distribution network 110 provided in the embodiment of this specification. Figure 3As shown, the power distribution network 110 includes a first power supply section 310, a second power supply section 320 and a busbar interconnecting circuit breaker 330, and the two busbar sections include busbar section I 312 and busbar section II 322; the first power supply section 310 corresponds to busbar section I 312, and busbar section I 312 is connected to the first incoming line 316 through a first low-voltage incoming line switch 314, and the first incoming line 316 is the outgoing line of the first transformer; the second power supply section 320 corresponds to busbar section II 322, and busbar section II 322 is connected to the second incoming line 326 through a second low-voltage incoming line switch 324, and the second incoming line 326 is the outgoing line of the second transformer; the busbar interconnecting circuit breaker 330 is connected across the first power supply section 310 and the second power supply section 320, and is used to realize the separate operation of busbar section I 312 and busbar section II 322.

[0063] In some embodiments, the power status parameters may include bus tie breaker status, and incoming line voltage, bus voltage, switch status, and transformer load data corresponding to the first power supply section and the second power supply section, respectively.

[0064] In some embodiments, the state sensing module 200 may include: a voltage detection unit for obtaining the voltage of bus section I, bus section II, the voltage at both ends of the bus tie circuit breaker, the first low-voltage incoming line voltage, and the second low-voltage incoming line voltage; a current detection unit for respectively obtaining the load current of the bus section I, bus section II, and the bus tie circuit breaker; a switch state detection unit for obtaining the state of the bus tie circuit breaker, the state of the first low-voltage incoming line switch, and the state of the second low-voltage incoming line switch, as well as the spring energy storage state of the circuit breaker corresponding to the first low-voltage incoming line switch and the second low-voltage incoming line switch. In the distribution network, low-voltage switches are usually used in conjunction with circuit breakers. The corresponding bus tie circuit breakers are used in conjunction with the bus tie circuit breakers.

[0065] In this embodiment, the incoming line is the power input line that supplies power to the busbar. Figure 4 In this embodiment, any bus section in the two bus sections loses voltage, that is, the voltage of any incoming line corresponding to the two bus sections drops to zero or an unusable value. In this embodiment, the standby automatic transfer function transfer switch is in the on position, that is, the low-voltage power distribution self-healing management platform 130 is provided with a standby automatic transfer function transfer switch, the standby automatic transfer function transfer switch can be an electronic switch or a mechanical switch, the mechanical switch can include a knob-type or a button-type switch, and the standby automatic transfer function transfer switch can be in the on position or the out position. For example, when the standby automatic transfer function transfer switch is in the on position, the logic judgment module 210 is ready to send a standby automatic transfer execution instruction to the control execution module 220 at any time; when the standby automatic transfer function transfer switch is in the out position, the logic judgment module 210 fails to send the standby automatic transfer execution instruction to the control execution module 220.

[0066] In some embodiments, the low-voltage power distribution self-healing management system also includes: a communication module for outputting fault alarm information and operation status messages; the fault alarm information includes status signal abnormality information; the message types of the operation status message include incoming power loss message, switch action failure message and power transfer success message.

[0067] In some embodiments, the low-voltage power distribution self-healing management system further includes: an energy storage module, the energy storage module including a charging control circuit and a supercapacitor, the charging control circuit charges the supercapacitor via a live incoming line, and the supercapacitor provides an uninterruptible power supply for the device.

[0068] In this embodiment, the status signal abnormality information may include information such as the abnormality of the remote signal of the bus section I, the abnormality of the remote signal of the bus section II or the abnormality of the remote signal of the bus interconnecting circuit breaker; the low-voltage incoming line power failure message may include information such as the low-voltage bus section I power failure, the low-voltage bus section II power failure, the first low-voltage incoming line power supply loss, and the second low-voltage incoming line power supply loss; the switch action failure message may include "the first low-voltage incoming line circuit breaker failed to close and could not be transferred", "the second low-voltage incoming line circuit breaker failed to close and could not be transferred", "the first low-voltage incoming line circuit breaker failed to open and the standby automatic start-up conditions were not met", "the second low-voltage incoming line circuit breaker failed to open and the standby automatic start-up conditions were not met", "the bus interconnecting circuit breaker failed to close and could not be transferred", "the first low-voltage incoming line circuit breaker spring did not store energy and could not be transferred Transferred", "The first low-voltage incoming line circuit breaker spring has not stored energy and cannot transfer power", "The busbar interconnection circuit breaker spring has not stored energy and cannot transfer power" and other information; the successful transfer message may include "The first low-voltage incoming line circuit breaker is closed successfully and has been transferred", "The second low-voltage incoming line circuit breaker is closed successfully and has been transferred", "The busbar interconnection circuit breaker is closed successfully and has been transferred", "The first low-voltage incoming line circuit breaker is opened successfully, the second low-voltage incoming line circuit breaker is closed successfully, and has been transferred", "The first low-voltage incoming line circuit breaker is opened successfully, the busbar interconnection circuit breaker is closed successfully, and has been transferred", "The second low-voltage incoming line circuit breaker is opened successfully, the first low-voltage incoming line circuit breaker is closed successfully, and has been transferred", "The second low-voltage incoming line circuit breaker is opened successfully, the busbar interconnection circuit breaker is closed successfully, and has been transferred".

[0069] Please see the attached Figure 5 , which is a schematic diagram of the standby power-on process for this manual. The device collects information such as the incoming line voltage, the voltage on both sides of the busbar, the incoming line current, the switch status, the transformer load, etc. once a second, and executes the standby power-on process once a second. When an abnormal situation such as incoming line voltage loss occurs, the standby power-on process will be automatically carried out to ensure the power supply of the low-voltage busbar when the load allows, thereby reducing the power outage time. The message contents corresponding to the message numbers in the figure are shown in Table 1. In the figure, 1If represents the load current of the 1# transformer before the power outage, 2If represents the load current of the 2# transformer before the power outage, 1Ie represents the rated current of the 1# transformer, and 2Ie represents the rated current of the 2# transformer.

[0070] Table 1 Appendix of this embodiment Figure 5 Displayed message content

[0071]

[0072] In some embodiments, see Figure 6 , Figure 6 This is a flow chart of determining the preset sequential control mode provided in the embodiment of this specification. Figure 6 As shown, when the power distribution network meets the preset sequential control mode, an operation instruction is sent to each circuit breaker according to the preset sequential control mode to automatically switch to the backup line in the two bus sections, including:

[0073] 400. Detect a phase difference, an amplitude difference, and a frequency difference between the first incoming line and the second incoming line in the power distribution network, and calculate a vector voltage difference based on the phase difference, the amplitude difference, and the frequency difference;

[0074] 410. When the vector pressure difference is less than a preset difference threshold, execute the hot inversion mode; when the vector pressure difference is not less than the preset difference threshold, execute the cold inversion mode.

[0075] In this embodiment, the hot reversal mode is a standby automatic transfer mode in which bus section I and bus section II are energized and connected in parallel after synchronization verification, and the power supply is quickly switched after synchronization verification; the cold reversal mode is a standby automatic transfer mode in which after any bus is completely de-energized and the residual voltage is qualified, the other bus in the two bus sections is closed to realize power supply switching.

[0076] When performing the hot-flip mode in this embodiment, the synchronization of the voltage, phase, and frequency of the two bus sections must be strictly verified; otherwise, a short circuit or equipment damage may occur. For example, in this embodiment, the voltage parameters of the first incoming line 316 and the second incoming line 326 can be monitored in real time through the voltage acquisition module. When the voltage parameters meet the preset synchronization conditions (i.e., the preset difference thresholds), i.e., the amplitude difference ΔU ≤ 5% Un (rated voltage), the phase difference Δφ ≤ 10°, and the frequency difference Δf ≤ 0.2 Hz in the voltage parameters, the circuit breakers are controlled to complete the parallel transition of the first incoming line 316 and the second incoming line 326 within a preset time window, where the parallel duration is limited to 10ms to 80ms. Then, in this embodiment, after verifying that the load current has been transferred to the second incoming line 326 through the current acquisition module, the circuit breaker of the first incoming line 316 (corresponding to bus section I) is disconnected.

[0077] In some embodiments, see Figure 7 , Figure 7 This is a flow chart of executing the hot dump mode provided in the embodiment of this specification. Figure 7 As shown, the execution steps of the heat pour mode include:

[0078] 500. Close the busbar tie circuit breaker that is initially in the open state, the busbar tie circuit breaker corresponding to the busbar tie switch, and the first incoming line and the second incoming line are temporarily connected in parallel through the busbar tie circuit breaker;

[0079] 510. Disconnect the incoming line circuit breaker corresponding to the incoming line to be withdrawn, and transfer the load current of the incoming line to be withdrawn to another incoming line. The incoming line to be withdrawn is the incoming line corresponding to the busbar that loses voltage in the two busbar sections.

[0080] When the system in this embodiment operates in hot-reversal mode, it closes the circuit breaker before opening it. Closing the circuit breaker can cause damage to the equipment, so the shorter the closing time, the better. This embodiment utilizes the coordination of various modules to achieve hot-reversal mode. When the system detects a closing remote signal, it initiates the opening operation. The closing time for the entire hot-reversal process is less than 100ms.

[0081] For some examples, see Figure 8 , Figure 8 This is a flow chart of executing the cold dump mode provided in the embodiment of this specification. Figure 8 As shown, the execution steps of the cold dump mode include:

[0082] 600. Disconnect the incoming line circuit breaker corresponding to the incoming line to be withdrawn, and the busbar corresponding to the incoming line to be withdrawn is in a power-off state;

[0083] 610. Close the busbar interconnecting circuit breaker which is initially in the open state, and electrically connect the busbar sections I and II to transfer the load from the incoming line to be withdrawn to the other incoming line, so that all loads are powered by the other incoming line.

[0084] When the system of this embodiment performs the cold reverse mode, that is, the ring is first opened and then closed, the ring opening will cause the busbar to lose pressure and the user's power outage. In order to reduce the impact on the user, this embodiment uses the mutual cooperation between the various modules to complete the cold reverse mode. The power outage duration of the entire cold reverse process is less than 100ms, realizing zero-perception electricity consumption for users.

[0085] In some embodiments, the low-voltage power distribution self-healing management system 100 also includes: a self-recovery module, which is used to start the self-recovery process when it is detected that the incoming line to be withdrawn has resumed power supply, and restore the bus section I and bus section II to the pre-fault operating mode; the self-recovery process includes: when it is detected that the incoming line to be withdrawn is energized again and the voltage difference, phase difference and frequency difference between the bus section I and the bus section II meet the closing conditions, disconnecting the busbar connecting circuit breaker; closing the incoming line circuit breaker of the incoming line to be withdrawn that has been energized again, so that the incoming line to be withdrawn can supply power to the load again.

[0086] In this embodiment, during normal operation of the distribution room, the two transformers operate in separate columns, with the incoming line breaker in the closed position and the tie breaker in the open position. If one incoming line loses power, causing a busbar-side power loss, the low-voltage distribution self-healing management system 100 initiates the backup automatic transfer process, executing the backup automatic transfer action if conditions are met; otherwise, an alarm is issued. When power is restored to the incoming line, the device initiates the self-recovery process, restoring the line to separate column operation.

[0087] The embodiment of this specification uses a low-voltage power distribution self-healing management system to replace manual operation for standby power supply switching, which has a high degree of automation. It can not only improve the operational efficiency of standby power supply switching, but also reduce the power outage time of users and the circulating current impact time of the device, thereby reducing damage to electrical equipment; in addition, the embodiment of this specification adopts multi-source collaborative judgment criteria to avoid switching failures or misoperations caused by single signal misjudgment, significantly improve the self-healing success rate, and improve power supply reliability; moreover, the embodiment of this specification can shorten the standby power supply switching time through multi-parameter parallel detection and dynamic logic judgment, and is suitable for scenarios with high requirements for power supply continuity such as data centers and hospitals; moreover, the embodiment of this specification avoids power supply miscutting or asynchronous closing by setting a preset sequential control mode, thereby reducing unnecessary switching actions and improving system stability. While ensuring rapid fault recovery, the embodiment of this specification improves the reliability, economy and flexibility of the distribution system, and is suitable for modern smart grids, microgrids and high-reliability power supply scenarios, with significant technical advantages and application value.

[0088] When using the low-voltage line control method and system provided in this manual for power transfer, hot reverse operation will prevent power outages. When using cold reverse operation, a power outage lasting approximately 100ms will occur, preventing appliances with inductive loads from completely losing power. Therefore, most appliances, such as washing machines and air conditioners, will not restart, achieving seamless power transfer and reducing user complaints. However, some appliances, such as desktop computers, may detect voltage fluctuations as a device fault, triggering a self-check, a restart, or a partial restart of certain functions.

[0089] The foregoing description of this specification describes specific embodiments. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that described in the embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order shown or the sequential order to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0090] See also Figure 9 , Figure 9 This is a flow chart of a low-voltage line control method with self-healing function provided by an embodiment of the present invention. The low-voltage power distribution self-healing management method can be Figure 1 The low-voltage power distribution self-healing management system 100 shown in FIG. The low-voltage power distribution self-healing management method may at least include the following steps:

[0091] 700. Obtain power status parameters of a power distribution network including two incoming lines and two busbars;

[0092] 710. Based on the pre-set standby automatic start-up conditions, when it is detected that any of the two bus sections loses pressure and the dynamic parameters of the distribution network meet the standby automatic start-up conditions, a standby automatic start-up execution instruction is sent to the control execution module to execute the standby automatic start-up process.

[0093] In this embodiment, the standby automatic start-up conditions may include: the standby automatic start-up function conversion switch is in the on position; at least one of the two incoming lines has pressure; two of the two low-voltage incoming line switches and the busbar connecting circuit breakers are in the closed state; the springs of the two low-voltage incoming line switches and the busbar connecting circuit breakers have stored energy.

[0094] In this embodiment, the standby automatic switching process may include: when the distribution network meets the preset sequential control mode, sending operation instructions to each circuit breaker according to the preset sequential control mode to automatically switch to the standby bus in the two incoming lines.

[0095] In some embodiments, the two bus sections include bus section I and bus section II; the power distribution network includes a first power supply section, a second power supply section and a busbar interconnecting circuit breaker, the first power supply section corresponds to bus section I, and bus section I is connected to the first incoming line 316 through a first low-voltage incoming line circuit breaker; the second power supply section corresponds to bus section II, and bus section II is connected to the second incoming line 326 through a second low-voltage incoming line circuit breaker; the busbar interconnecting circuit breaker is connected across the first power supply section and the second power supply section to realize the separate operation of bus section I and bus section II.

[0096] The low-voltage power distribution line is connected to an energy storage module, which includes a charging control circuit and a supercapacitor. The charging control circuit charges the supercapacitor via a live incoming line, and the supercapacitor provides an uninterruptible power supply for the device.

[0097] The low-voltage line control method further includes the following steps:

[0098] When the cold reverse mode is executed, the device reads the function setting flag position in the "automatic" or "cold reverse" position. When the function is set to the "automatic" position, it automatically determines the phase, amplitude and frequency between the two low-voltage incoming lines so that the vector pressure difference is not less than the preset difference threshold;

[0099] When the functional position is set to the "cold down" position;

[0100] Disconnect the incoming line circuit breaker corresponding to the incoming line to be withdrawn. When the power-off time of the de-energized bus section reaches the preset relay time, close the busbar connecting circuit breaker to transfer the load from the incoming line to be withdrawn to the other incoming line so that all loads are powered by the other incoming line.

[0101] By using energy storage modules as an intermediate transition, a shorter power outage time can be achieved for a de-energized busbar. This reduces the original 100ms power outage duration to approximately 50ms. When a 100ms power outage occurs, some smart devices will detect power anomalies and initiate self-tests or reboots. When the power outage duration is reduced to 50ms, fewer smart devices will experience anomalies, resulting in fewer self-tests or reboots. This further expands the scope of seamless power transfer.

[0102] The method for determining the preset "automatic" or "cold down" input identification position is:

[0103] 1. When in the "Auto" position: By automatically judging the phase, amplitude and frequency between the two low-voltage incoming lines, the vector pressure difference is not less than the preset difference threshold. If the judgment result is that the vector pressure difference is not less than the preset difference threshold.

[0104] 2. In the "cold down" position:

[0105] By reading the average power of the de-energized bus section in a short period of time before the power failure and the existing power of the energized bus transformer; the total power of the calculated results meets the power requirement of the energized bus transformer.

[0106] In some embodiments, the power status parameters include the busbar tie circuit breaker status, the first low-voltage incoming line voltage, the second low-voltage incoming line voltage, the bus section I voltage, the bus section II voltage, the first low-voltage incoming line switch status, the second low-voltage incoming line switch status, the transformer load corresponding to the first low-voltage incoming line, and the transformer load corresponding to the second low-voltage incoming line.

[0107] In some embodiments, the low-voltage power distribution self-healing management method may further include outputting fault alarm information and operation status messages; the fault alarm information includes status signal abnormality information; the message types of the operation status message include incoming power loss message, switch action failure message and power transfer success message.

[0108] In some embodiments, when the power distribution network satisfies a preset sequential control mode, an operation instruction is sent to each circuit breaker according to the preset sequential control mode to automatically switch to the two-incoming line operation mode, including: detecting the phase difference, amplitude difference, and frequency difference between the first incoming line and the second incoming line in the power distribution network, calculating a vector voltage difference based on the phase difference, amplitude difference, and frequency difference, executing a hot reverse mode when the vector voltage difference is less than a preset difference threshold, and executing a cold reverse mode when the vector voltage difference is not less than the preset difference threshold.

[0109] The hot-reversal mode is a standby automatic transfer mode in which busbar section I and busbar section II are connected in parallel after synchronization verification and power is quickly switched after synchronization verification.

[0110] The cooling mode is:

[0111] 1. After any section of the bus is completely de-energized and the residual voltage is qualified, close the busbar interconnection circuit breaker to realize the standby automatic transfer mode of power supply switching.

[0112] 2. The phase, amplitude and frequency between the two low-voltage incoming lines are such that the vector voltage difference is not less than a preset difference threshold; disconnect the required busbar corresponding low-voltage incoming line circuit breaker, and then close the busbar connecting circuit breaker.

[0113] In some embodiments, the execution steps of the hot-reversal mode include: closing the busbar tie circuit breaker which is initially in the open state, the busbar tie circuit breaker corresponds to the busbar tie switch, and the first incoming line and the second incoming line are short-term parallel-operated through the busbar tie circuit breaker; disconnecting the incoming line circuit breaker corresponding to the incoming line to be withdrawn, and transferring the load current of the incoming line to be withdrawn to another incoming line, and the incoming line to be withdrawn is the incoming line corresponding to the busbar that has lost pressure in the two bus sections.

[0114] In some embodiments, the execution steps of the cold reverse mode include: disconnecting the incoming line circuit breaker corresponding to the incoming line to be withdrawn, and the busbar corresponding to the incoming line to be withdrawn is in a power-off state; closing the busbar connecting circuit breaker whose initial state is in the open state, and the busbar section I and the busbar section II are electrically connected, transferring the load from the incoming line to be withdrawn to the other incoming line, so that all loads are powered by the other incoming line.

[0115] In some embodiments, the low-voltage power distribution self-healing management method further includes: upon detecting that the incoming line to be withdrawn has restored power supply, initiating a self-recovery process to restore the bus section I and bus section II to a pre-fault operating mode; the self-recovery process includes:

[0116] When it is detected that the incoming line to be withdrawn is energized again and the voltage difference, phase difference and frequency difference between the two low-voltage incoming power supplies meet the "hot fail" condition, the incoming line circuit breaker of the re-energized incoming line to be withdrawn is closed; the busbar connecting circuit breaker is disconnected, so that the incoming line to be withdrawn can supply power to the load again.

[0117] When it is detected that the incoming line to be withdrawn is energized again and the voltage difference, phase difference and frequency difference between the two low-voltage incoming power supplies do not meet the "hot failure" condition, the busbar connecting circuit breaker is disconnected; the incoming circuit breaker of the incoming line to be withdrawn that is energized again is closed, so that the incoming line to be withdrawn can supply power to the load again.

[0118] Based on the contents of the low-voltage distribution self-healing management system in multiple embodiments of this specification, it can be seen that the low-voltage distribution self-healing management method provided by the embodiment of this specification is based on the low-voltage distribution self-healing management system. The low-voltage distribution self-healing management system is used to replace manual operation for standby power supply switching. The degree of automation is high, which can not only improve the operational efficiency of standby power supply switching, but also reduce the user's power outage time and the circulating current impact time of the device, thereby reducing damage to electrical equipment. In addition, the embodiment of this specification adopts multi-source collaborative judgment criteria to avoid switching failure or misoperation caused by single signal misjudgment, significantly improve the self-healing success rate, and improve power supply reliability. Moreover, the embodiment of this specification can shorten the standby power supply switching time through multi-parameter parallel detection and dynamic logic judgment, and is suitable for scenarios with high requirements for power supply continuity such as data centers and hospitals. Moreover, the embodiment of this specification avoids power supply miscutting or asynchronous closing by setting a preset sequential control mode, thereby reducing unnecessary switching actions and improving system stability. While ensuring rapid fault recovery, the embodiment of this specification improves the reliability, economy and flexibility of the distribution system. It is suitable for modern smart grids, microgrids and high-reliability power supply scenarios, and has significant technical advantages and application value.

[0119] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referenced across them. Each embodiment focuses on the differences from the other embodiments. In particular, the low-voltage distribution self-healing management method embodiment is fundamentally similar to the low-voltage distribution self-healing management system embodiment, so its description is relatively simple. For relevant details, refer to the description of the system embodiment.

[0120] See also Figure 10 A schematic structural diagram of an electronic device provided in an embodiment of this specification is shown.

[0121] like Figure 10 As shown, the electronic device 800 may include: at least one processor 810 , at least one network interface 840 , a user interface 830 , a memory 850 and at least one communication bus 820 .

[0122] The communication bus 820 may be used to implement connection and communication among the above components.

[0123] The user interface 830 may include buttons, and the optional user interface may also include a standard wired interface or a wireless interface.

[0124] The network interface 840 may include, but is not limited to, a Bluetooth module, an NFC module, a Wi-Fi module, and the like.

[0125] Among them, the processor 810 may include one or more processing cores. The processor 810 uses various interfaces and lines to connect the various parts of the entire electronic device 800, and executes various functions of the electronic device 800 and processes data by running or executing instructions, programs, code sets or instruction sets stored in the memory 850, and calling data stored in the memory 850. Optionally, the processor 810 can be implemented in at least one hardware form of DSP, FPGA, and PLA. The processor 810 can integrate one or a combination of CPU, GPU, and modem. Among them, the CPU mainly processes the operating system, user interface, and application programs; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; and the modem is used to handle wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 810, but may be implemented separately through a chip.

[0126] Memory 850 may include either RAM or ROM. Optionally, memory 850 may include non-transitory computer-readable media. Memory 850 may be used to store instructions, programs, codes, code sets, or instruction sets. Memory 850 may include a program storage area and a data storage area. The program storage area may store instructions for implementing an operating system, instructions for at least one function (such as touch control, sound playback, image playback, etc.), and instructions for implementing the aforementioned method embodiments. The data storage area may store data related to the aforementioned method embodiments. Memory 850 may also optionally be at least one storage device located remotely from the processor 810. Memory 850, as a computer storage medium, may include an operating system, a network communication module, a user interface module, and a low-voltage power distribution self-healing management application. Processor 810 may be configured to invoke the low-voltage power distribution self-healing management application stored in memory 850 and execute the steps of the low-voltage power distribution self-healing management method described in the aforementioned embodiments.

[0127] The embodiments of this specification also provide a computer-readable storage medium having instructions stored therein that, when executed on a computer or processor, cause the computer or processor to perform one or more steps of the above embodiments. If the components of the electronic device described above are implemented as software functional units and sold or used as independent products, they may be stored in a computer-readable storage medium.

[0128] In the above embodiments, all or part of the embodiments may be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. A computer program product comprises one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions according to the embodiments of this specification are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted via a computer-readable storage medium. The computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. Available media may be magnetic media (eg, floppy disks, hard disks, tapes), optical media (eg, digital versatile discs (DVDs)), or semiconductor media (eg, solid state drives (SSDs)).

[0129] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing the relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When executed, the program can include the processes of the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks. The technical features of this embodiment and the implementation scheme can be combined in any manner unless they conflict.

[0130] The above embodiments are merely preferred embodiments of this specification and are not intended to limit the scope of this specification. Without departing from the design spirit of this specification, various modifications and improvements made to the technical solutions of this specification by ordinary technicians in this field should fall within the scope of protection determined by the claims of this specification.

Claims

1. A low-voltage line control system with self-healing function, characterized in that: include: A state sensing module is used to obtain power state parameters of the distribution network including two incoming lines and two busbars; a logic judgment module, based on a preset backup automatic transfer starting condition, sending a backup automatic transfer execution instruction to the control execution module to execute the backup automatic transfer power supply transfer process when detecting that any of the two bus sections has lost voltage and the dynamic parameters of the distribution network meet the backup automatic transfer starting condition; The standby automatic start-up conditions include: The automatic transfer function switch is in the on position; At least one of the two incoming lines has pressure; Two of the two low-voltage incoming line switches and busbar tie circuit breakers are in the closed position; The springs of the two low-voltage incoming line switches and the busbar connecting circuit breaker have stored energy; The control execution module executes the standby automatic transfer process according to the standby automatic transfer execution instruction sent by the logic judgment module. The standby automatic transfer process includes sending operation instructions to each circuit breaker according to the preset sequential control mode when the distribution network meets the preset sequential control mode to automatically switch the power supply operation mode.

2. A low-voltage line control system with self-healing function according to claim 1, characterized in that: The two incoming lines include a first incoming line and a second incoming line; the distribution network includes a bus section I, a bus section II and a busbar interconnecting circuit breaker, the bus section I is connected to the first distribution transformer through a first low-voltage incoming line switch; the bus section II is connected to the second distribution transformer through a second low-voltage incoming line switch; the busbar interconnecting circuit breaker is connected across the bus section I and the bus section II to realize the separate operation of the bus section I and the bus section II.

3. A low-voltage line control system with self-healing function according to claim 1, characterized in that: The power status parameters include busbar tie breaker status, first low-voltage incoming line voltage, second low-voltage incoming line voltage, busbar section I voltage, busbar section II voltage, first low-voltage incoming line switch status, second low-voltage incoming line switch status, first low-voltage incoming line corresponding distribution transformer load, second low-voltage incoming line corresponding distribution transformer load, It also includes a communication module, which is used to output fault alarm information and operation status messages; the fault alarm information includes status signal abnormality information; the message types of the operation status message include incoming line pressure loss message, busbar pressure loss message, switch action failure message and power transfer success message.

4. A low-voltage line control system with self-healing function according to claim 3, characterized in that: The state perception module includes: A voltage detection unit is used to obtain the first low-voltage incoming line voltage, the second low-voltage incoming line voltage, the bus voltage of section I and the bus voltage of section II; A current detection unit is used to obtain the load current of the low-voltage incoming line section I and the low-voltage incoming line section II respectively; The switch status detection unit is used to obtain the status of the busbar tie circuit breaker, the status of the first low-voltage incoming line switch and the status of the second low-voltage incoming line switch.

5. The low-voltage line control system with self-healing function according to claim 1 is characterized in that: Also includes: The energy storage module includes a charging control circuit and a supercapacitor. The charging control circuit charges the supercapacitor via a charged low-voltage incoming line.

6. A low-voltage line control system with self-healing function according to claim 1, characterized in that: When the power distribution network satisfies a preset sequential control mode, an operation instruction is sent to each circuit breaker according to the preset sequential control mode to automatically switch to the operation mode of the two low-voltage incoming lines, including: detecting a phase difference, an amplitude difference, and a frequency difference between the first low-voltage incoming line and the second low-voltage incoming line in the power distribution network, calculating a vector pressure difference based on the phase difference, the amplitude difference, and the frequency difference, executing a hot reverse mode when the vector pressure difference is less than a preset threshold, and executing a cold reverse mode when the vector pressure difference is equal to or greater than the threshold, The hot-reversal mode is a standby automatic transfer mode in which busbar section I and busbar section II are connected in parallel after synchronization verification, and power supply is quickly switched. The cold-down mode is a transfer mode in which the busbar connecting circuit breaker is closed to realize power supply switching after any section of the busbar is completely de-energized and the residual voltage is qualified.

7. A low-voltage line control system with self-healing function according to claim 6, characterized in that: The execution steps of the hot pour mode include: Closing the busbar tie circuit breaker that is initially in the open state, the busbar tie circuit breaker corresponding to the busbar tie switch, and the first low-voltage incoming line and the second low-voltage incoming line are temporarily connected in parallel through the busbar tie circuit breaker; Disconnecting the circuit breaker corresponding to the low-voltage incoming line to be disconnected, transferring the load current of the low-voltage incoming line to be disconnected to another low-voltage incoming line; The execution steps of the cold dump mode include: Disconnect the circuit breaker corresponding to the low-voltage incoming line to be disconnected, and the busbar corresponding to the low-voltage incoming line to be disconnected is in a power-off state; When the busbar connecting circuit breaker, which is initially in the open state, is closed, the busbar sections I and II are electrically connected, and the load is transferred from the low-voltage incoming line to be withdrawn to the other low-voltage incoming line, so that all loads are powered by the other low-voltage incoming line.

8. The low-voltage line control system with self-healing function according to claim 1, characterized in that: Also includes: The self-recovery module is used to start the self-recovery process when it detects that the power supply of the incoming line to be withdrawn has been restored, and restore the bus section I and bus section II to the pre-fault operation mode; The self-recovery process includes: When it is detected that the low-voltage incoming line to be withdrawn is energized again and the voltage difference, phase difference and frequency difference between the bus section I and the bus section II meet the closing conditions, the busbar connecting circuit breaker is opened; Close the circuit breaker of the low-voltage incoming line to be disconnected that is re-energized, so that the low-voltage incoming line to be disconnected can supply power to the load again.

9. A low-voltage line control method with self-healing function, characterized in that: include: Obtain power status parameters of a distribution network including two low-voltage incoming lines and two busbars; Based on the preset backup automatic transfer starting conditions, when it is detected that any of the two bus sections loses voltage and the dynamic parameters of the distribution network meet the backup automatic transfer starting conditions, a backup automatic transfer execution instruction is sent to the control execution module to execute the backup automatic transfer power supply process; The standby automatic start-up conditions include: The automatic transfer function switch is in the on position; At least one of the two incoming lines has pressure; Two of the two low-voltage incoming line switches and the busbar connecting circuit breaker are in the closed state; The springs of the two low-voltage incoming line switches and the busbar connecting circuit breaker have stored energy; The standby automatic switching process includes sending operation instructions to each circuit breaker according to the preset sequential control mode when the distribution network meets the preset sequential control mode, so as to automatically switch to the standby bus in the two incoming lines.

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