Low-voltage self-healing transformation method, device and equipment of power distribution system and storage medium

Abstract

The invention discloses a low-voltage self-healing transformation method, device and equipment of a power distribution system and a storage medium, and relates to the technical field of electrical design. The method comprises the following steps: when a power failure condition occurs in a current transformer area, acquiring power supply switching information of an adjacent transformer area; according to the power supply transfer information, judging whether the adjacent transformer area meets the power supply transfer requirement of the current transformer area; if yes, a low-voltage connection line from the adjacent transformer area to the current transformer area is controlled to be conducted, and electric energy of the adjacent transformer area is used for supplying power to the current transformer area through the low-voltage connection line. When equipment in the transformer area breaks down and is overhauled, power supply is switched from adjacent transformer areas, and continuous and reliable power supply for users is guaranteed. In the power supply switching process, the user does not have power failure perception, the power supply reliability of the user is improved, and low-voltage self-healing of the small-area power distribution room is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of electrical design, and particularly to a low-voltage self-healing transformation method, device, equipment and storage medium for a distribution system. Background Art

[0002] Currently, the areas of substations in low-voltage distribution areas in operation vary in size. Especially in densely populated areas such as the old city center and urban villages, the area of substations is generally small, and it is difficult to meet the demand for adding low-voltage connection cabinets in the equipment operation space; while newly laying low-voltage cables from the first ends of two distribution areas to the connection box, the path of the newly laid power line is long and it is necessary to excavate and build a new pipe gallery or erect low-voltage lines outside the original building. It is difficult to coordinate with the right-of-way units along the path of the power line, and it is difficult to excavate the newly built pipe gallery, resulting in difficulties in implementing the low-voltage self-healing transformation project.

[0003] The above content is only used to assist in understanding the technical solution of the present application, and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main purpose of the present application is to provide a low-voltage self-healing transformation method, device, equipment and storage medium for a distribution system, aiming to solve the technical problem that the space position of the substation in the prior art does not have the conditions to build a new low-voltage connection cabinet, resulting in the inability to realize power transfer.

[0005] To achieve the above purpose, the present application proposes a low-voltage self-healing transformation method for a distribution system, and the low-voltage self-healing transformation method for the distribution system includes:

[0006] When a power outage occurs in the current distribution area, obtain the power transfer information of the adjacent distribution area;

[0007] Judge whether the adjacent distribution area meets the power transfer demand for the current distribution area according to the power transfer information;

[0008] If so, control to conduct the low-voltage connection line from the adjacent distribution area to the current distribution area, and use the electric energy of the adjacent distribution area to supply power to the current distribution area through the low-voltage connection line.

[0009] In an embodiment, the middle section of the low-voltage main outgoing line of the adjacent distribution area and the current distribution area is within the range of the load division line of the distribution area, and a first low-voltage connection box is set to connect the middle section of the low-voltage main outgoing line of the adjacent distribution area and the current distribution area;

[0010] The step of controlling to conduct the low-voltage connection line from the adjacent distribution area to the current distribution area includes:

[0011] Control to close the low-voltage connection switch of the first low-voltage connection box to conduct the low-voltage connection line from the adjacent distribution area to the current distribution area.

[0012] In one embodiment, the end section of the low-voltage main outgoing line of the adjacent power distribution area and the current power distribution area is within the range of the load division line of the power distribution area, and a second low-voltage connection box is set to connect the end section of the low-voltage main outgoing line of the adjacent power distribution area and the current power distribution area;

[0013] The step of controlling the conduction of the low-voltage connection line from the adjacent power distribution area to the current power distribution area includes:

[0014] Control the closing of the low-voltage connection switch of the second low-voltage connection box to conduct the low-voltage connection line from the adjacent power distribution area to the current power distribution area.

[0015] In one embodiment, the current power distribution area is provided with a compact low-voltage power distribution cabinet for connection with the low-voltage connection cabinet of the adjacent power distribution area;

[0016] The step of controlling the conduction of the low-voltage connection line from the adjacent power distribution area to the current power distribution area includes:

[0017] Control the closing of the low-voltage connection switch of the compact low-voltage power distribution cabinet to conduct the low-voltage connection line from the adjacent power distribution area to the current power distribution area.

[0018] In one embodiment, after the step of judging whether the adjacent power distribution area meets the power transfer demand for the current power distribution area according to the power transfer information, it further includes:

[0019] If not, control the conduction of the power supply circuit of the power generation vehicle to the current power distribution area, and use the electric energy of the power generation vehicle to supply power to the current power distribution area.

[0020] In one embodiment, the compact low-voltage power distribution cabinet includes: an incoming line switch, an outgoing line switch, a connection switch, and a quick connection port for the power generation vehicle;

[0021] One end of the incoming line switch is connected to the cable incoming line, and the other end of the incoming line switch is connected to the outgoing line switch, the connection switch, and the quick connection port for the power generation vehicle through a busbar.

[0022] In one embodiment, the compact low-voltage power distribution cabinet is of a rectangular box structure, the busbar is horizontally arranged in the middle of the rectangular box, the incoming line switch is arranged on one side of the top of the busbar in the rectangular box, and the outgoing line switch, the connection switch, and the quick connection port for the power generation vehicle are arranged on one side of the bottom of the busbar.

[0023] In addition, to achieve the above object, the present application also proposes a low-voltage self-healing transformation device for a power distribution system, and the low-voltage self-healing transformation device for the power distribution system includes:

[0024] A power outage judgment module, configured to obtain the power transfer information of an adjacent power distribution area when a power outage occurs in the current power distribution area;

[0025] A power supply selection module, configured to determine whether the adjacent power distribution area meets the power supply demand for the current power distribution area according to the power supply transfer information;

[0026] A power supply transfer control module, configured to control the conduction of the low-voltage connection line from the adjacent power distribution area to the current power distribution area, and supply power to the current power distribution area through the low-voltage connection line using the electric energy of the adjacent power distribution area.

[0027] In addition, to achieve the above object, the present application further provides a low-voltage self-healing transformation device for a power distribution system. The device includes: a memory, a processor, and a computer program stored on the memory and executable on the processor. The computer program is configured to implement the steps of the low-voltage self-healing transformation method for a power distribution system as described above.

[0028] In addition, to achieve the above object, the present application further provides a storage medium. The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the low-voltage self-healing transformation method for a power distribution system as described above are implemented.

[0029] The present application provides a low-voltage self-healing transformation method for a power distribution system. First, when a power outage occurs in the current power distribution area, the power supply transfer information of the adjacent power distribution area is obtained; according to the power supply transfer information, it is determined whether the adjacent power distribution area meets the power supply demand for the current power distribution area; if so, the low-voltage connection line from the adjacent power distribution area to the current power distribution area is controlled to be conducted, and the electric energy of the adjacent power distribution area is used to supply power to the current power distribution area through the low-voltage connection line. During the failure or maintenance of the power distribution area equipment, power is transferred from the adjacent power distribution area to ensure continuous and reliable power supply to users. It meets the requirements of rapid power supply transfer during power outages, and users have no power outage perception during the power supply transfer process, improving the power supply reliability of users and realizing low-voltage self-healing of small-area power distribution rooms. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0031] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a schematic flowchart of the first embodiment of the low-voltage self-healing transformation method for the power distribution system of the present application;

[0033] Figure 2Schematic wiring diagram of a low-voltage connection box installed in the middle section of a power distribution area provided in the second embodiment of the low-voltage self-healing transformation method for the power distribution system of this application;

[0034] Figure 3 Schematic wiring diagram of a low-voltage connection box installed at the end section of a power distribution area provided in the second embodiment of the low-voltage self-healing transformation method for the power distribution system of this application;

[0035] Figure 4 Schematic wiring diagram of a compact low-voltage power distribution cabinet provided in the third embodiment of the low-voltage self-healing transformation method for the power distribution system of this application;

[0036] Figure 5 Schematic diagram of the internal layout of a compact low-voltage power distribution cabinet provided in the third embodiment of the low-voltage self-healing transformation method for the power distribution system of this application;

[0037] Figure 6 Schematic diagram of the module structure of the low-voltage self-healing transformation device for the power distribution system in the embodiment of this application;

[0038] Figure 7 Schematic diagram of the structure of the low-voltage self-healing transformation equipment for the power distribution system, which is the hardware operating environment involved in the low-voltage self-healing transformation method for the power distribution system in the embodiment of this application.

[0039] The realization of the purpose, functional features and advantages of this application will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0040] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of this application and are not used to limit this application.

[0041] In order to better understand the technical solutions of this application, the following will be described in detail in combination with the accompanying drawings of the specification and specific implementation manners.

[0042] The main solution of the embodiment of this application is: when a power outage occurs in the current power distribution area, obtain the power transfer information of the adjacent power distribution area; judge whether the adjacent power distribution area meets the power transfer requirements for the current power distribution area according to the power transfer information; if so, control the conduction of the low-voltage connection line from the adjacent power distribution area to the current power distribution area, and use the electric energy of the adjacent power distribution area to supply power to the current power distribution area through the low-voltage connection line.

[0043] In the current low-voltage self-healing transformation technology of the distribution system, the connection for power transfer is mainly achieved by setting up a low-voltage connection cabinet at the head end of the substation area or by setting up a low-voltage connection line at the head end of the substation area. In actual operation, the design of setting up a low-voltage connection cabinet at the head end of the substation area requires the construction of a new low-voltage connection cabinet in the distribution substation. Currently, the areas of the distribution substations for low-voltage substations in operation in the distribution network vary, especially in densely populated areas such as the central old city and urban villages in the city center, the areas of the distribution substations are generally small, and it is very difficult to meet the demand for adding a low-voltage connection cabinet in terms of equipment operation space. The low-voltage connection cabinets in the substation area are all independent connection cabinets, which are used for the connection of two distribution transformers in the same indoor (or relatively close) distribution substation. The size of the low-voltage connection cabinet body is 600mm wide × 800mm deep × 1900mm high, and the size of the low-voltage incoming and outgoing line cabinet body is 1000mm wide × 800mm deep × 1900mm high. In most densely populated areas such as the central old city and urban villages in the city center, the areas of the distribution substations are generally small, and the length and width of the substation rooms are mostly about 3 - 3.5 meters, which do not meet the space conditions for simultaneously building a low-voltage connection cabinet and a low-voltage incoming and outgoing line cabinet. When the power supply from the upper level is cut off, power transfer cannot be carried out, and the power supply reliability and safety of users cannot be guaranteed.

[0044] The present application provides a solution. When there is a fault or maintenance in the equipment of the substation area, power is transferred from the adjacent substation area to ensure the continuous and reliable power supply to users. It meets the requirements for rapid power transfer during power outages, and users have no perception of power outage during the power transfer process, improving the power supply reliability of users and realizing the low-voltage self-healing of small-area distribution substations.

[0045] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication, and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or a low-voltage self-healing transformation device of a distribution system that can implement the above functions. Hereinafter, taking the low-voltage self-healing transformation device of the distribution system as an example, this embodiment and the following embodiments will be described.

[0046] Based on this, the embodiment of the present application provides a method for low-voltage self-healing transformation of a distribution system, referring to Figure 1 , Figure 1 is a schematic flowchart of the first embodiment of the method for low-voltage self-healing transformation of the distribution system of the present application.

[0047] In this embodiment, the method for low-voltage self-healing transformation of the distribution system includes steps S10 to S30:

[0048] Step S10: When a power outage occurs in the current substation area, obtain the power transfer information of the adjacent substation area.

[0049] It should be noted that a substation area is the power supply area of a heavy transformer (a certain transformer in installation or operation) in the power system, which can be classified into urban residential substation areas, commercial substation areas, industrial substation areas, and agricultural substation areas according to the composite type. An adjacent substation area is a power supply substation area adjacent to the current substation area where a power outage occurs in terms of spatial location. The power supply transfer information may be the power supply capacity information of the adjacent substation area, the distance, spatial location, and power supply transfer permission information between the adjacent substation area and the current substation area. When the current substation area has a power outage and there is an adjacent substation area at a relatively close distance and the power supply capacity of the adjacent substation area meets the simultaneous power supply requirements of this substation area and the power outage substation area, the adjacent substation area can be used to supply power to the current substation area.

[0050] Step S20: Determine whether the adjacent substation area meets the power supply transfer requirements for the current substation area according to the power supply transfer information.

[0051] It should be noted that it is possible to determine whether the adjacent substation area meets the power supply transfer requirements for the current substation area based on the actual positions of the current substation area and the adjacent substation area. For example, when a low-voltage connection line is set between some substations, new low-voltage cables need to be laid to the connection box. The path of the newly laid power line is long and it is necessary to excavate and build a new pipe gallery or erect low-voltage lines outside the original building. The coordination of the property rights units along the path of the power line is difficult and the excavation of the new pipe gallery is difficult, resulting in difficulties in implementing the low-voltage self-healing transformation project. In this case, the power supply transfer ability of the connection box is not available, and a low-voltage connection cabinet can be selected for connection. When the space in the distribution substation is limited, for example, in densely populated areas such as the old city center and urban villages in the city, the area of the distribution substation is generally small, and the length and width of the substation room are mostly about 3 - 3.5 meters. There is no space to build a new low-voltage connection cabinet and the path for laying the low-voltage connection power line is long. In this case, a low-voltage connection box can be selected for connection.

[0052] It should be understood that to determine whether the power supply capacity of the adjacent substation area can simultaneously meet the electricity consumption requirements of this substation area and the power outage substation area, the nameplate capacity of the transformer in the adjacent substation area can be obtained first to clarify its maximum load-bearing capacity. Then, real-time or recent average load data can be obtained through a monitoring system (such as SCADA, smart meters) to calculate the remaining capacity. Add the current load of this substation area to the historical peak load of the power outage substation area to obtain the theoretical maximum demand, and estimate the inrush current when equipment such as motors and frequency converters in the power outage substation area start to ensure that the instantaneous overload capacity of the transformer and the line can be covered. At the same time, according to industry standards (such as the requirements of the State Grid), a safety margin of 10% - 20% is reserved. Then, based on the comparison result of the total demand and the allowable maximum load, when the total demand is less than the allowable maximum load, power supply transfer from the adjacent substation area is allowed, and when the total demand is greater than the allowable maximum load, power supply transfer from the adjacent substation area is not allowed.

[0053] Step S30: If so, control the low-voltage connection line from the adjacent substation area to the current substation area to be turned on, and use the electric energy of the adjacent substation area to supply power to the current substation area through the low-voltage connection line.

[0054] It should be noted that when allowing the adjacent substation area to supply power to the power-outage current substation area, a low-voltage connection cabinet or a low-voltage connection box is selected for power supply transfer according to the actual requirements of the above-mentioned substation area. Among them, the low-voltage connection box is usually a compact box structure with a small volume, only 400mm wide × 400mm deep × 800mm high. It has the advantages of small volume, simple installation, and can be installed on the wall or on the ground. The equipment has no noise, the installation is not restricted by the site, and the space utilization rate is high. Flexibly applying the low-voltage connection scheme can effectively solve the problems that the space position of the aforementioned substation does not have the conditions for newly building a low-voltage connection cabinet, the laying path of the low-voltage connection power line is long, and the coordination difficulty of the property right units along the line path is large. The low-voltage connection cabinet has a large volume and sufficient internal space, and can integrate more functional modules, such as circuit breakers, contactors, intelligent meters, protection relays, etc. It is 600mm wide × 800mm deep × 1900mm high, and provides protection functions such as overload and short circuit, with higher reliability.

[0055] It should be understood that the low-voltage connection line is the electric energy transmission line for the adjacent substation area to supply power to the current substation area, and it can be composed of copper-core or aluminum-core conductors, and is selected according to parameters such as current-carrying capacity and voltage drop.

[0056] In this embodiment, when a power outage occurs in the current substation area, the power supply transfer information of the adjacent substation area is obtained; according to the power supply transfer information, it is judged whether the adjacent substation area meets the power supply transfer requirements for the current substation area; if so, control the low-voltage connection line from the adjacent substation area to the current substation area to be turned on, and use the electric energy of the adjacent substation area to supply power to the current substation area through the low-voltage connection line. When the equipment in the substation area fails or is under maintenance, power is supplied by the adjacent substation area to ensure continuous and reliable power supply to users. It meets the requirements of rapid power supply transfer during power outages, and users have no power outage perception during the power supply transfer process, improving the power supply reliability of users and realizing the low-voltage self-healing of small-area distribution substations.

[0057] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar content as in the above-mentioned first embodiment can be referred to the above introduction and will not be repeated hereinafter. On this basis, please refer to Figure 2 , Figure 2 which is the wiring schematic diagram of setting a low-voltage connection box in the middle section of the substation area provided for the second embodiment of the low-voltage self-healing transformation method of the distribution system of the present application.

[0058] Among them, the middle section of the low-voltage main outgoing line of the adjacent substation area and the current substation area is within the range of the substation area load division line, and a first low-voltage connection box 100 is set to connect the middle section of the low-voltage main outgoing line of the adjacent substation area and the current substation area. 1000A is the rated current of the disconnecting switch, which is 1000 amperes, and 630 / 3P is the rated current of three-phase 630A.

[0059] It should be noted that at this time, for the power supply transfer of the substation area, a low-voltage connection box is set in the middle section of the low-voltage outgoing line of the substation area. This is applicable when the middle sections of the low-voltage main outgoing lines of two adjacent substation areas are near the substation area load division line, the newly laid low-voltage connection line is relatively short, and the spatial position meets the conditions for installing the low-voltage connection box. At this time, the low-voltage connection switch K1 of the first low-voltage connection box can be controlled to close, and the low-voltage connection line from the adjacent substation area to the current substation area can be conducted. The connection switch is a dedicated switch device used to establish an electrical connection or switch between different power sources or distribution circuits, and is used to realize the connection and switching of power sources or circuits.

[0060] It should be understood that the load division line is a virtual or actual dividing line in the power system, which can be realized through physical devices (such as circuit breakers, disconnecting switches, etc.). It is used to separate areas or nodes with different load characteristics. When a fault occurs in the power system, the load division line helps to quickly locate the fault area and take corresponding isolation measures to prevent the fault from spreading to other areas.

[0061] Further, referring to Figure 3 , Figure 3 is the wiring schematic diagram of setting a low-voltage connection box at the end section of the substation area provided in the second embodiment of the low-voltage self-healing transformation method for the distribution system of this application.

[0062] Among them, the end sections of the low-voltage main outgoing lines of the adjacent substation area and the current substation area are within the range of the substation area load division line, and a second low-voltage connection box 200 is set to connect the end sections of the low-voltage main outgoing lines of the adjacent substation area and the current substation area.

[0063] It should be noted that at this time, for the power supply through neighboring substations in the substation area, a low-voltage connection box is set at the end of the low-voltage outgoing line in the substation area. This is applicable when the ends of the low-voltage main outgoing lines of two adjacent substations are near the load division line in the substation area. The connection box is installed near the load division line of the two adjacent substations, shortening the distance between the connection box and the main outgoing lines of the two adjacent substations. At this time, the low-voltage connection switch K2 of the second low-voltage connection box can be controlled to be closed, and the low-voltage connection line from the adjacent substation area to the current substation area can be conducted. The low-voltage connection equipment and the low-voltage outgoing lines are centrally arranged, which is convenient for daily operation and maintenance management. Low-voltage connection lines are respectively laid from the ends of the low-voltage main outgoing lines of two adjacent substation areas to the connection box, and the laying path distance is relatively short. While saving investment, it will not cause a large voltage drop and can meet the power supply quality of users. Moreover, the space position meets the conditions for installing the low-voltage connection box. The size of the low-voltage connection box is only 400mm wide × 400mm deep × 800mm high. It has a small volume, is easy to install, and can be installed on the wall or on the ground. The equipment has no noise, the installation is not restricted by the site, and the space utilization rate is high.

[0064] It should be understood that in addition to setting the low-voltage connection box at the end and middle sections of the low-voltage outgoing lines in the substation area, similarly, it can also be set at the beginning section of the low-voltage outgoing lines in the substation area. Flexibly applying the low-voltage connection scheme can effectively solve the problems that the space position of the aforementioned distribution substation does not have the conditions for newly building a low-voltage connection cabinet, the laying path of the low-voltage connection power line is long, and the coordination difficulty of the property right units along the line path is large.

[0065] In this embodiment, the middle sections of the low-voltage main outgoing lines of the adjacent substation area and the current substation area are within the range of the load division line in the substation area. A first low-voltage connection box is set to connect the middle sections of the low-voltage main outgoing lines of the adjacent substation area and the current substation area; the low-voltage connection switch of the first low-voltage connection box is controlled to be closed, and the low-voltage connection line from the adjacent substation area to the current substation area is conducted. The ends of the low-voltage main outgoing lines of the adjacent substation area and the current substation area are within the range of the load division line in the substation area. A second low-voltage connection box is set to connect the ends of the low-voltage main outgoing lines of the adjacent substation area and the current substation area; the low-voltage connection switch of the second low-voltage connection box is controlled to be closed, and the low-voltage connection line from the adjacent substation area to the current substation area is conducted. It effectively solves the construction difficulties such as the space position of the distribution substation not having the conditions for newly building a low-voltage connection cabinet, the long laying path of the low-voltage connection power line, and the large coordination difficulty of the property right units along the line path. When there are equipment failures or maintenance in the substation area, the connection switch is closed to supply power through the adjacent substation area, ensuring the continuous and reliable power supply to users.

[0066] Based on the first embodiment and the second embodiment of the present application, in the third embodiment of the present application, the content that is the same as or similar to the above-mentioned first embodiment and second embodiment can be referred to the above introduction and will not be elaborated hereinafter. On this basis, please refer to Figure 4 , Figure 4It is a wiring schematic diagram of the compact low-voltage power distribution cabinet provided for the third embodiment of the low-voltage self-healing transformation method of the power distribution system of this application. A compact low-voltage power distribution cabinet 300 is set in the current substation area to communicate with the adjacent substation area.

[0067] It should be noted that when the space in the power distribution station is limited and only a new low-voltage incoming and outgoing line cabinet can be built, and the space position does not meet the requirements for building a new low-voltage connection cabinet, "compact low-voltage power distribution cabinet design" can be adopted, that is, a quick plug-in interface for the power generation vehicle is added in the low-voltage incoming and outgoing line cabinet, and at the same time, a low-voltage connection switch is reserved, so as to reserve an interface for power transfer between low-voltage substation areas and power transfer by the power generation vehicle, meet the requirements for quick power transfer during power outages, and users have no power outage perception during the power transfer process, improving the power supply reliability of users.

[0068] It should be understood that when the adjacent substation area meets the power transfer demand for the current substation area, by laying a low-voltage connection line from the adjacent substation area to the low-voltage connection switch, controlling the closing of the low-voltage connection switch of the compact low-voltage power distribution cabinet, and conducting the low-voltage connection line from the adjacent substation area to the current substation area, power transfer is carried out by the adjacent substation area. The cost of power transfer by the low-voltage connection switch is relatively low and can be used for substation areas that need power transfer during long-term power outages. When the adjacent substation area does not meet the power transfer demand for the current substation area, the power supply circuit from the power generation vehicle to the current substation area is controlled to conduct, and the electric energy of the power generation vehicle is used to supply power to the current substation area. The cost of power transfer by the power generation vehicle is relatively high and can be used for substation areas that need power transfer during short-term power outages.

[0069] Refer to Figure 5 , Figure 5 It is an internal layout schematic diagram of the compact low-voltage power distribution cabinet provided for the third embodiment of the low-voltage self-healing transformation method of the power distribution system of this application.

[0070] The compact low-voltage power distribution cabinet 300 includes: an incoming line switch 301, an outgoing line switch 302, a connection switch 303, and a quick access port 304 for the power generation vehicle; one end of the incoming line switch 301 is connected to the cable incoming line, and the other end of the incoming line switch 301 is connected to the outgoing line switch 302, the connection switch 303, and the quick access port 304 for the power generation vehicle through a busbar 305.

[0071] The compact low-voltage power distribution cabinet 300 can also be provided with a metering device 306, a device for measuring and recording the use of electric energy, which can accurately measure and record the electricity consumption of users, including active power and reactive power, and transmit the data to the management system of the power department, and can accurately measure electric energy during long-term operation and is not easily interfered and affected by the external environment.

[0072] Further, the compact low-voltage power distribution cabinet is of a rectangular box structure. The busbar is horizontally arranged in the middle of the rectangular box. The incoming line switch is arranged on one side of the top of the busbar in the rectangular box, and the outgoing line switch, the tie switch and the quick connection port for the power generation vehicle are arranged on one side of the bottom of the busbar. The size of the compact low-voltage power distribution cabinet is only 1200 mm wide × 800 mm deep × 1900 mm high. Compared with the traditional low-voltage cabinet configuration connection scheme (low-voltage tie cabinet + low-voltage incoming and outgoing line cabinet), the cabinet area is reduced by 0.36 square meters, which is suitable for areas such as the city center and urban villages where the area of the substation is generally small.

[0073] In this embodiment, a compact low-voltage power distribution cabinet is arranged in the current substation area to communicate with the low-voltage tie cabinet in the adjacent substation area. When the adjacent substation area meets the power transfer demand for the current substation area, the low-voltage tie switch of the compact low-voltage power distribution cabinet is controlled to close, and the low-voltage tie line from the adjacent substation area to the current substation area is conducted. When the adjacent substation area does not meet the power transfer demand for the current substation area, the power supply circuit from the power generation vehicle to the current substation area is controlled to be conducted, and the electric energy of the power generation vehicle is used to supply power to the current substation area. Interfaces are reserved for power transfer between low-voltage substation areas and power transfer by the power generation vehicle to meet the requirement of rapid power transfer during power outages. During the power transfer process, users have no perception of power outages, the power supply reliability of users is improved, and low-voltage self-healing of small-area distribution rooms is realized.

[0074] It should be noted that the above examples are only for understanding the present application and do not constitute a limitation on the low-voltage self-healing transformation method of the power distribution system of the present application. Based on this technical concept, more forms of simple transformations are within the protection scope of the present application.

[0075] The present application also provides a device for low-voltage self-healing transformation of a power distribution system. Please refer to Figure 6 The device for low-voltage self-healing transformation of the power distribution system includes:

[0076] A power outage judgment module 10, configured to obtain the power transfer information of the adjacent substation area when a power outage occurs in the current substation area;

[0077] A power supply selection module 20, configured to judge whether the adjacent substation area meets the power transfer demand for the current substation area according to the power transfer information;

[0078] A power transfer control module 30, configured to control the conduction of the low-voltage tie line from the adjacent substation area to the current substation area, and use the electric energy of the adjacent substation area to supply power to the current substation area through the low-voltage tie line.

[0079] The low-voltage self-healing transformation device for the power distribution system provided by this application adopts the low-voltage self-healing transformation method in the above-mentioned embodiment, and can solve the technical problem that the space position of the substation does not have a newly built low-voltage tie cabinet, resulting in the inability to realize power transfer. Compared with the prior art, the beneficial effects of the low-voltage self-healing transformation device for the power distribution system provided by this application are the same as those of the low-voltage self-healing transformation method provided by the above-mentioned embodiment, and other technical features in the low-voltage self-healing transformation device are the same as the features disclosed in the method of the above-mentioned embodiment, and will not be elaborated here.

[0080] This application provides a low-voltage self-healing transformation device for a power distribution system. The low-voltage self-healing transformation device for the power distribution system includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the low-voltage self-healing transformation method in Embodiment 1 above.

[0081] Refer to the following Figure 7 , which shows a schematic structural diagram of a low-voltage self-healing transformation device suitable for implementing the embodiments of this application. The low-voltage self-healing transformation device in the embodiments of this application may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), in-vehicle terminals (such as in-vehicle navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 7 The low-voltage self-healing transformation device shown is only an example, and should not impose any limitations on the functions and usage scope of the embodiments of this application.

[0082] As shown in Figure 7As shown, the low-voltage self-healing transformation equipment of the power distribution system may include a processing device 1001 (such as a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM: Read Only Memory) 1002 or the program loaded from the storage device 1003 into the random access memory (RAM: Random Access Memory) 1004. In the RAM 1004, various programs and data required for the operation of the low-voltage self-healing transformation equipment of the power distribution system are also stored. The processing device 1001, the ROM 1002, and the RAM 1004 are connected to each other through a bus 1005. The input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the low-voltage self-healing transformation equipment of the power distribution system to communicate with other devices wirelessly or wiredly to exchange data. Although the figure shows the low-voltage self-healing transformation equipment of the power distribution system with various systems, it should be understood that it is not required to implement or have all the shown systems. More or fewer systems can be implemented or had alternatively.

[0083] Particularly, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains program codes for executing the methods shown in the flowcharts. In such an embodiment, the computer program can be downloaded and installed from the network through the communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the methods of the embodiments disclosed in the present application are executed.

[0084] The low-voltage self-healing transformation equipment provided by the present application adopts the low-voltage self-healing transformation method in the above-mentioned embodiment, and can solve the technical problem that it is impossible to realize power transfer due to the lack of a new low-voltage tie cabinet in the spatial position of the substation. Compared with the prior art, the beneficial effects of the low-voltage self-healing transformation equipment provided by the present application are the same as those of the low-voltage self-healing transformation method provided by the above-mentioned embodiment, and other technical features in the low-voltage self-healing transformation equipment are the same as the features disclosed in the method of the previous embodiment, and will not be elaborated here.

[0085] It should be understood that each part disclosed in this application can be implemented by hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0086] As mentioned above, the above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application can easily think of changes or substitutions, which should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

[0087] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., computer programs) stored thereon, and the computer-readable program instructions are used to execute the low-voltage self-healing transformation method of the power distribution system in the above embodiments.

[0088] The computer-readable storage medium provided by this application can be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination of the above. More specific examples of the computer-readable storage medium can include, but are not limited to: electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) or flash memory, optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above. In this embodiment, the computer-readable storage medium can be any tangible medium that contains or stores a program, and this program can be used by or combined with an instruction execution system, device, or device. The program code contained on the computer-readable storage medium can be transmitted by any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0089] The above computer-readable storage medium can be included in the low-voltage self-healing transformation device of the power distribution system; it can also exist alone without being assembled into the low-voltage self-healing transformation device of the power distribution system.

[0090] Computer program code for performing the operations of this application can be written in one or more programming languages or combinations thereof. The above-mentioned programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, executed as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any kind of network, including a local area network (LAN: Local Area Network) or a wide area network (WAN: Wide Area Network), or it can be connected to an external computer (for example, by using an Internet service provider to connect through the Internet).

[0091] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code that contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than marked in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0092] The modules involved in the embodiments described in this application can be implemented in software or in hardware. Among them, the name of the module does not constitute a limitation on the unit itself in some cases.

[0093] The readable storage medium provided in this application is a computer-readable storage medium. The computer-readable storage medium stores computer-readable program instructions (i.e., computer programs) for performing the above-mentioned low-voltage self-healing transformation method of the power distribution system, and can solve the technical problem that the spatial location of the substation does not have a new low-voltage connection cabinet, resulting in the inability to realize power transfer. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the low-voltage self-healing transformation method of the power distribution system provided in the above embodiments, and will not be elaborated here.

[0094] The above are only some embodiments of the present application, and thus do not limit the patent scope of the present application. Any equivalent structural transformation made under the technical concept of the present application by using the content of the specification and drawings of the present application, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A low-voltage self-healing transformation method for a power distribution system, characterized in that The low-voltage self-healing transformation method for the distribution system includes: When a power outage occurs in the current substation area, obtaining the power transfer information of the adjacent substation area; Judging whether the adjacent substation area meets the power transfer requirements for the current substation area according to the power transfer information; If so, controlling the conduction of the low-voltage connection line from the adjacent substation area to the current substation area, and using the electric energy of the adjacent substation area to supply power to the current substation area through the low-voltage connection line.

2. The low-voltage self-healing transformation method of the power distribution system according to claim 1, characterized in that The middle section of the low-voltage main outgoing line of the adjacent substation area and the current substation area is within the range of the substation area load division line, and a first low-voltage connection box is set to connect the middle section of the low-voltage main outgoing line of the adjacent substation area and the current substation area; The step of controlling the conduction of the low-voltage connection line from the adjacent substation area to the current substation area includes: Controlling the closing of the low-voltage connection switch of the first low-voltage connection box to conduct the low-voltage connection line from the adjacent substation area to the current substation area.

3. The low-voltage self-healing transformation method of the power distribution system according to claim 1, characterized in that, The end section of the low-voltage main outgoing line of the adjacent substation area and the current substation area is within the range of the substation area load division line, and a second low-voltage connection box is set to connect the end section of the low-voltage main outgoing line of the adjacent substation area and the current substation area; The step of controlling the conduction of the low-voltage connection line from the adjacent substation area to the current substation area includes: Controlling the closing of the low-voltage connection switch of the second low-voltage connection box to conduct the low-voltage connection line from the adjacent substation area to the current substation area.

4. The low-voltage self-healing transformation method of the power distribution system according to claim 1, characterized in that A compact low-voltage power distribution cabinet is set in the current substation area for connection with the low-voltage connection cabinet of the adjacent substation area; The step of controlling the conduction of the low-voltage connection line from the adjacent substation area to the current substation area includes: Controlling the closing of the low-voltage connection switch of the compact low-voltage power distribution cabinet to conduct the low-voltage connection line from the adjacent substation area to the current substation area.

5. The low-voltage self-healing transformation method of the power distribution system according to claim 4, characterized in that, After the step of judging whether the adjacent substation area meets the power transfer requirements for the current substation area according to the power transfer information, it further includes: If not, controlling the conduction of the power supply circuit of the power generation vehicle to the current substation area, and using the electric energy of the power generation vehicle to supply power to the current substation area.

6. The low-voltage self-healing transformation method of the power distribution system according to claim 5, characterized in that, The compact low-voltage power distribution cabinet includes: an incoming line switch, an outgoing line switch, a connection switch and a quick connection port for the power generation vehicle; One end of the incoming line switch is connected to the cable incoming line, and the other end of the incoming line switch is connected to the outgoing line switch, the connection switch and the quick connection port for the power generation vehicle through a busbar.

7. The low-voltage self-healing transformation method for the power distribution system according to claim 6, characterized in that, The compact low-voltage power distribution cabinet is of a rectangular box structure, the busbar is horizontally arranged in the middle of the rectangular box, the incoming line switch is arranged on one side of the top of the busbar in the rectangular box, and the outgoing line switch, the connection switch and the quick connection port for the power generation vehicle are arranged on one side of the bottom of the busbar.

8. A low-voltage self-healing transformation device for a power distribution system, characterized in that, The device includes: A power outage judgment module, which is used to obtain the power transfer information of the adjacent substation area when a power outage occurs in the current substation area; A power supply selection module, which is used to judge whether the adjacent substation area meets the power transfer requirements for the current substation area according to the power transfer information; A power transfer control module, which is used to control the conduction of the low-voltage connection line from the adjacent substation area to the current substation area, and use the electric energy of the adjacent substation area to supply power to the current substation area through the low-voltage connection line.

9. A low-voltage self-healing transformation device for a power distribution system, characterized in that, The low-voltage self-healing transformation equipment of the distribution system includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, and the computer program is configured to implement the steps of the low-voltage self-healing transformation method of the distribution system according to any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, it implements the steps of the low-voltage self-healing transformation method of the distribution system according to any one of claims 1 to 7.

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