Control methods, devices, equipment and readable storage media for medium-voltage AC busbars

Abstract

This invention relates to a control method, apparatus, device, and readable storage medium for a medium-voltage AC bus. The control method for the medium-voltage AC bus includes: identifying the structure of the main medium-voltage AC bus; dividing the main medium-voltage AC bus into multiple power supply units based on the identification result, each power supply unit including at least a load and an auxiliary power supply device, and a first switch capable of disconnecting the connection between the power supply unit and the main medium-voltage AC bus is provided at the junction of two adjacent power supply units; locating and handling the power supply unit on the main medium-voltage AC bus where the fault is located, and disconnecting the power supply unit where the fault is located from the main medium-voltage AC bus; analyzing and controlling the internal structure of the power supply unit where the fault is located, locating and handling the faulty section within the power supply unit where the fault is located, and disconnecting the faulty section from the main medium-voltage AC bus. This invention solves the technical problems of poor accuracy and poor applicability of auxiliary power supply control in medium-voltage AC buses.

Description

Technical Field

[0001] This invention relates to the field of rail vehicle technology, and further to a control method, apparatus, equipment, and readable storage medium for a medium-voltage AC busbar, particularly to a control method, apparatus, equipment, and readable storage medium for a medium-voltage AC busbar suitable for fixed and variable formation trains. Background Technology

[0002] The AC loads in rail vehicles require power from the medium-voltage AC bus. Typically, a single car group in a rail vehicle has multiple auxiliary power supply units (such as auxiliary converters and traction auxiliary converters) connected to the grid to output medium-voltage AC power to the medium-voltage AC bus. Currently, rail vehicles generally use a fixed car group configuration, with controllable AC switching devices (such as AC contactors and circuit breakers) used to segment the power supply to the medium-voltage AC bus, reducing the impact of partial AC bus faults on the entire vehicle.

[0003] In the field of rail vehicles, for example, with a fixed formation of eight cars, one approach for high-speed trains is to use two coupling contactors to divide the eight cars into three sections. When a short-circuit fault occurs on the AC bus, the corresponding faulty section is disconnected. Another, more stable approach is to use three AC circuit breakers to divide the eight cars into four sections. When a fault occurs, the corresponding faulty section is disconnected, which offers higher precision compared to the three-section method.

[0004] Given a fixed-formation rail vehicle with a defined circuit structure, the software control method can be easily implemented by exhaustively enumerating fault scenarios and programming for each scenario. The relationship between the segmentation accuracy n and the fault scenario S is S = 2. n -1. Existing solutions have the advantages of simplicity and intuitiveness in circuit structure and software control methods. However, they also have the following shortcomings:

[0005] 1. When handling a short circuit fault on a medium-voltage AC bus, if a short circuit fault occurs in a section containing an auxiliary power supply device, even if the carriage where the auxiliary power supply device is located is not short-circuited, the auxiliary power supply device in the section will still be mistakenly disconnected due to insufficient sectioning accuracy.

[0006] Second, the increased segmentation accuracy leads to an exponential increase in the number of fault scenarios. For example, for an eight-car train with a medium-voltage AC busbar, when the medium-voltage AC busbar is segmented into four sections, there are 15 fault scenarios; when the medium-voltage AC busbar is segmented into eight sections, the number of fault scenarios increases to 255. At this point, it is possible to achieve some fault scenarios without disconnecting the auxiliary power supply device. Although the control accuracy of the medium-voltage AC busbar is doubled, the number of rule entries that need to be organized in the control method increases to 17 times the original number. If the train group has ten cars and the medium-voltage AC busbar is segmented into ten sections, the number of fault scenarios will increase to 1023. If an exhaustive control scheme is still used, the implementation difficulty will be dozens of times that of the four-section scheme.

[0007] Third, existing technologies require a customized control method and system for each type of medium-voltage AC busbar structure, without considering the distribution of AC loads, auxiliary power supply devices, and controllable AC switch devices on the medium-voltage AC busbar, and without considering the control method when there is no auxiliary power supply device in the fault section. It lacks compatibility with variable formation rail vehicles, and its applicability and control flexibility are poor.

[0008] There is currently no effective solution to the problems of poor control accuracy and poor applicability of auxiliary power supply in medium-voltage AC busbars in related technologies.

[0009] Therefore, based on years of experience and practice in related industries, the inventor proposes a control method, device, equipment, and readable storage medium for medium-voltage AC busbars to overcome the shortcomings of existing technologies. Summary of the Invention

[0010] The purpose of this invention is to provide a control method, device, equipment, and readable storage medium for medium-voltage AC buses, which can meet the control requirements of medium-voltage AC buses in various train formations and segmentation accuracies of rail vehicles. It enables the identification of the structure of medium-voltage AC buses in fixed or variable train formations of rail vehicles, improves the accuracy of fault location of medium-voltage AC buses, achieves precise control of auxiliary power supply, and effectively reduces the impact of short-circuit faults in medium-voltage AC buses on train operation and passenger experience.

[0011] The objective of this invention can be achieved through the following methods:

[0012] This invention provides a control method for a medium-voltage AC bus, which is applied to the auxiliary power supply system of a rail vehicle. The rail vehicle has at least one car group, each car group includes multiple cars, and the output terminal of the auxiliary power supply device corresponding to each car is connected to the main medium-voltage AC bus. The control method for the medium-voltage AC bus includes the following steps:

[0013] Identify the structure of the total medium-voltage AC busbar;

[0014] Based on the identification results, multiple power supply units are divided into sections on the main medium-voltage AC bus. Each power supply unit includes at least a load and an auxiliary power supply device for supplying power to the load. A first switch is provided at the junction of two adjacent power supply units to disconnect the power supply unit from the main medium-voltage AC bus.

[0015] Locate and handle the power supply unit where the fault is located on the main medium-voltage AC bus, and disconnect the power supply unit where the fault is located from the main medium-voltage AC bus;

[0016] The system analyzes and controls the internal components of the power supply unit where the fault occurs, locates and handles the faulty section within the power supply unit, and disconnects the faulty section from the main medium-voltage AC bus.

[0017] In a preferred embodiment of the present invention, identifying the total medium-voltage AC bus structure includes:

[0018] Identify and sort the positions of the load, the auxiliary power supply device, the first switch located at the junction of two adjacent power supply units, and / or the second switch located within the power supply unit on the total medium-voltage AC bus.

[0019] Obtain the position information of the sorted load, the auxiliary power supply device, the first switch and / or the second switch on the main medium voltage AC bus.

[0020] In a preferred embodiment of the present invention, when the first switch corresponding to the power supply unit is disconnected in the multiple power supply units separated from the main medium-voltage AC bus, electrical isolation is formed between the power supply unit and the main medium-voltage AC bus.

[0021] In a preferred embodiment of the present invention, the number of first switches between two adjacent power supply units is at least one, and the first switches are located on the total medium-voltage AC bus.

[0022] In a preferred embodiment of the present invention, locating and handling the power supply unit where the fault is located on the main medium-voltage AC bus, and disconnecting the power supply unit where the fault is located from the main medium-voltage AC bus includes:

[0023] Disconnect each of the first switches on the main medium-voltage AC bus to disconnect each of the power supply units from the main medium-voltage AC bus;

[0024] Determine whether each of the power supply units has malfunctioned;

[0025] If the power supply unit does not malfunction, then the corresponding first switch is closed;

[0026] If the power supply unit fails, the corresponding first switch remains open.

[0027] In a preferred embodiment of the present invention, the step of analyzing and controlling the internal structure of the power supply unit where the fault occurs, locating and handling the faulty section within the power supply unit, and disconnecting the faulty section from the main medium-voltage AC bus includes:

[0028] Disconnect the auxiliary power supply device within the power supply unit where the fault occurs;

[0029] The self-test of the auxiliary power supply device in the power supply unit is completed sequentially to confirm whether the fault on the medium-voltage AC bus comes from the inside of the auxiliary power supply device.

[0030] Determine whether there is a second switch within the power supply unit that can disconnect the power supply unit from the main medium-voltage AC busbar from the inside of the power supply unit;

[0031] If the second switch is not present, disconnect the auxiliary power supply device in the power supply unit where the fault is located, keep the first switches corresponding to both sides of the power supply unit where the fault is located cut off and blocked, disconnect them from the main medium voltage AC bus, and cut off and block the auxiliary power supply device in the power supply unit where the fault is located that has an internal short circuit fault.

[0032] If the second switch exists and it is determined that the fault originates from inside the auxiliary power supply device, then the faulty auxiliary power supply device and the first and / or second switches located on both sides thereof are disconnected and blocked; or if the second switch exists and it is determined that the fault originates from outside the auxiliary power supply device, then the faulty section is separated within the power supply unit by the second switch to further investigate the location of the fault.

[0033] In a preferred embodiment of the present invention, further troubleshooting the location of the fault includes: according to the location information of the auxiliary power supply device and the second switch in the power supply unit where the fault is located, sequentially controlling the second switch in the power supply unit to open or close, and checking the fault conditions in the fault section of the power supply unit where the fault is located one by one.

[0034] In a preferred embodiment of the present invention, further troubleshooting includes:

[0035] Read the current data of the main medium-voltage AC bus corresponding to the power supply unit where the fault is located to identify the fault section;

[0036] If the auxiliary power supply device exists in the fault section, disconnect the auxiliary power supply device in the carriage where the fault is located from the main medium-voltage AC bus, keep the first switch and / or the second switch corresponding to the fault section where the fault is located disconnected and blocked, and close the first switch and / or the second switch outside the fault section.

[0037] In a preferred embodiment of the present invention, after further investigating the location of the fault, the method further includes:

[0038] The loads on the main medium-voltage AC bus and the auxiliary power supply device connected to the main medium-voltage AC bus and capable of supplying power to the loads are reassembled into a power supply unit.

[0039] This invention provides a control device for a medium-voltage AC bus, comprising:

[0040] Busbar structure identification unit, used to identify the structure of the main medium-voltage AC busbar;

[0041] The busbar structure optimization unit is used to divide the total medium-voltage AC busbar into multiple power supply units according to the identification results. Each power supply unit includes at least a load and an auxiliary power supply device for supplying power to the load. A first switch is provided at the junction of two adjacent power supply units to disconnect the power supply unit from the total medium-voltage AC busbar.

[0042] The fault preprocessing unit is used to locate and process the power supply unit where the fault is located on the main medium-voltage AC bus, and disconnect the power supply unit where the fault is located from the main medium-voltage AC bus.

[0043] The fault handling unit is used to analyze and control the internal structure of the power supply unit where the fault occurs, locate and handle the faulty section within the power supply unit, and disconnect the faulty section from the main medium-voltage AC bus.

[0044] In a preferred embodiment of the present invention, the busbar structure identification unit includes:

[0045] The position identification module is used to identify and sort the positions of the load, the auxiliary power supply device, the first switch located at the junction of two adjacent power supply units and / or the second switch located within the power supply unit on the total medium voltage AC bus.

[0046] The location information acquisition module is used to acquire the location information of the sorted load, the auxiliary power supply device, the first switch and / or the second switch on the total medium voltage AC bus.

[0047] In a preferred embodiment of the present invention, the fault preprocessing unit includes:

[0048] The first processing module is used to disconnect each of the first switches on the main medium-voltage AC bus to disconnect each of the power supply units from the main medium-voltage AC bus.

[0049] The fault diagnosis module is used to determine whether each of the power supply units has failed.

[0050] The second processing module is used to close the corresponding first switch if the power supply unit does not malfunction.

[0051] The third processing module is used to keep the corresponding first switch off if the power supply unit fails.

[0052] In a preferred embodiment of the present invention, the fault handling unit includes:

[0053] Disconnect module, used to disconnect the auxiliary power supply device in the power supply unit where the fault occurs;

[0054] The self-test module is used to sequentially complete the self-test of the auxiliary power supply device in the power supply unit to confirm whether the fault on the medium voltage AC bus comes from the inside of the auxiliary power supply device.

[0055] The detection module is used to determine whether there is a second switch in the power supply unit that can disconnect the power supply unit from the main medium-voltage AC bus by the inside of the power supply unit;

[0056] The fourth processing module is used to disconnect the auxiliary power supply device in the power supply unit where the fault is located if the second switch is not present, keep the first switches corresponding to both sides of the power supply unit where the fault is located cut off and blocked, so that they are disconnected from the main medium voltage AC bus, and cut off and block the auxiliary power supply device in the power supply unit where the fault is located that has an internal short circuit fault.

[0057] The fifth processing module is used to, if the second switch exists and it is determined that the fault originates from inside the auxiliary power supply device, cut off and block the faulty auxiliary power supply device and the first switch and / or the second switch located on both sides thereof; or if the second switch exists and it is determined that the fault originates from outside the auxiliary power supply device, the second switch is used to separate the faulty section within the power supply unit to further investigate the location of the fault.

[0058] The present invention provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-described control method for a medium-voltage AC bus.

[0059] The present invention provides a computer-readable storage medium storing a computer program that performs the above-described control method for a medium-voltage AC bus.

[0060] As described above, the features and advantages of the medium-voltage AC bus control method, device, equipment, and readable storage medium of the present invention are as follows: Compared with the existing control methods that provide fixed rules for fixed-formation trains, the present invention is applicable to the scene identification and compatibility of fixed and variable-formation trains with different configurations of carriage groups and the number of carriages. By identifying the structure of the main medium-voltage AC bus and multiple power supply units, the fault handling on the main medium-voltage AC bus is reduced to the location and handling of fault sections within the power supply units and power supply units. This achieves carriage-level fault location, improves the efficiency and accuracy of fault analysis, and facilitates fault analysis and train maintenance. Attached Figure Description

[0061] The accompanying drawings are intended only to illustrate and explain the present invention and do not limit the scope of the invention.

[0062] in:

[0063] Figure 1 This is one of the flowcharts for the control method of the AC bus in the embodiments of the present invention.

[0064] Figure 2 This is the second flowchart of the control method for the AC bus in an embodiment of the present invention.

[0065] Figure 3 This is the third flowchart of the control method for the AC bus in this embodiment of the invention.

[0066] Figure 4 This is the fourth flowchart of the control method for the AC bus in this embodiment of the invention.

[0067] Figure 5 This is one of the structural schematic diagrams of the carriage assembly in the AC bus control method of this invention.

[0068] Figure 6 This is the second schematic diagram of the structure of the carriage assembly in the AC bus control method of this invention.

[0069] Figure 7 This is the third schematic diagram of the structure of the carriage assembly in the AC bus control method of this invention.

[0070] Figure 8 : This is one of the structural block diagrams of the control device for the AC busbar in an embodiment of the present invention.

[0071] Figure 9This is the second structural block diagram of the control device for the AC busbar in an embodiment of the present invention.

[0072] Figure 10 This is the third structural block diagram of the control device for the AC busbar in an embodiment of the present invention.

[0073] Figure 11 This is the fourth structural block diagram of the control device for the AC busbar in this embodiment of the invention.

[0074] The reference numerals in the accompanying drawings of this invention are:

[0075] 100. Busbar structure identification unit; 1001. Position identification module;

[0076] 1002. Location information acquisition module; 200. Busbar structure optimization unit;

[0077] 300. Fault preprocessing unit; 3001. First processing module;

[0078] 3002. Fault diagnosis module; 3003. Second processing module;

[0079] 3004. Third processing module; 400. Fault handling unit;

[0080] 4001. Module disconnection; 4002. Module self-test;

[0081] 4003. Detection module; 4004. Fourth processing module;

[0082] 4005, Fifth Processing Module. Detailed Implementation

[0083] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0084] Implementation Method 1

[0085] like Figure 1 As shown, this invention provides a control method for a medium-voltage AC bus, which is applied to the auxiliary power supply system of a rail vehicle. The rail vehicle has at least one car group, and each car group includes multiple cars. The specific number of cars in the group can be flexibly configured. The auxiliary power supply system of the rail vehicle includes one or more auxiliary power supply devices distributed in different cars (i.e., each car can have one or more auxiliary power supply devices). The output terminal of the auxiliary power supply device corresponding to each car is connected to the main medium-voltage AC bus, and a first switch and a second switch for separating the cars and / or auxiliary power supply devices are provided on the main medium-voltage AC bus.

[0086] The first and second switches can be, but are not limited to, controllable AC switching devices. These controllable AC switching devices can divide the main medium-voltage AC bus into multiple AC power supply sections.

[0087] The control method for the medium-voltage AC bus of the present invention includes the following steps:

[0088] Step S1: Identify the structure of the main medium-voltage AC busbar;

[0089] In an optional embodiment of the present invention, such as Figure 2 As shown, step S1 includes:

[0090] Step S101: Identify and sort the positions of the load, auxiliary power supply device, first switch located at the junction of two adjacent power supply units and / or second switch located within the power supply unit on the main medium voltage AC bus;

[0091] Furthermore, the equipment on the main medium-voltage AC bus can be identified based on the train communication network information's grouping type, thereby enabling the identification of the carriage structure of fixed or variable-formation rail vehicles, and the identification of the locations of auxiliary power supply devices, switches (first and / or second switches), and loads on the main medium-voltage AC bus. The train communication network information includes train network topology information, train network direction information, carriage location information for auxiliary power supply devices, and carriage location information for controllable AC switchgear.

[0092] Furthermore, the locations of auxiliary power supply devices, switches, and loads on the main medium-voltage AC bus can be sorted along the main medium-voltage AC bus, and each device can be numbered from 1 to n along the main medium-voltage AC bus.

[0093] Step S102: Obtain the position information of the sorted load, the auxiliary power supply device, the first switch and / or the second switch on the main medium voltage AC bus.

[0094] Furthermore, after sorting the locations of the auxiliary power supply devices, the first switch and / or the second switch, and the loads on the main medium-voltage AC bus along the main medium-voltage AC bus, the obtained location information of each device can be the corresponding number information.

[0095] Step S2: Based on the identification results, process the location information of the auxiliary power supply devices, the first switch and / or the second switch on the main medium-voltage AC bus, and the load on the main medium-voltage AC bus, and divide the main medium-voltage AC bus into multiple power supply units. Each power supply unit includes at least a load and an auxiliary power supply device that supplies power to the load, and a first switch that can disconnect the power supply unit from the main medium-voltage AC bus is provided at the junction of two adjacent power supply units.

[0096] The requirements for the power supply units separated from the main medium-voltage AC bus are as follows: after the first switch corresponding to the power supply unit is disconnected, the electrical connection of the carriage corresponding to the power supply unit is cut off from the main medium-voltage AC bus, that is, electrical isolation is formed between the power supply unit and the main medium-voltage AC bus. At this time, one or more auxiliary power supply devices that still maintain electrical connection and their output power supply load constitute the aforementioned power supply unit.

[0097] Furthermore, there is at least one first switch between two adjacent power supply units, and the first switch is located on the main medium-voltage AC bus between the two adjacent power supply units. When a power supply unit is located at one end of the main medium-voltage AC bus (i.e., the power supply unit is connected to another power supply unit on only one side, and there are no other power supply units on the other side), only one first switch needs to be disconnected to disconnect the power supply unit from the main medium-voltage AC bus; when a power supply unit is located in the middle of the main medium-voltage AC bus (i.e., the power supply unit is connected to another power supply unit on both sides), both first switches need to be disconnected simultaneously to disconnect the power supply unit from the main medium-voltage AC bus.

[0098] Step S3: Locate and handle the power supply unit where the fault (short circuit fault) is located on the main medium-voltage AC bus, and disconnect the power supply unit where the fault is located from the main medium-voltage AC bus;

[0099] In an optional embodiment of the present invention, such as Figure 3 As shown, step S3 includes:

[0100] Step S301: Disconnect the first switch on each of the main medium-voltage AC busbars to disconnect each power supply unit from the main medium-voltage AC busbars;

[0101] Step S302: Determine whether each power supply unit has malfunctioned;

[0102] Among them, the faults reported by power supply units without faults disappeared, while the faults reported by power supply units with short-circuit faults continued to be reported.

[0103] Step S303: If the power supply unit does not malfunction, close the corresponding first switch, and the power supply unit will be normally connected to the main medium voltage AC bus and continue to work;

[0104] Step S304: If a power supply unit fails, the corresponding first switch remains open, thereby disconnecting the faulty power supply unit from the main medium-voltage AC bus.

[0105] Step S4: Analyze and control the internal workings of the power supply unit where the fault is located, locate and handle the faulty section within the power supply unit, and disconnect the faulty section from the main medium-voltage AC bus.

[0106] In an optional embodiment of the present invention, such as Figure 4 As shown, step S4 includes:

[0107] Step S401: Disconnect the auxiliary power supply device in the power supply unit where the fault is located;

[0108] Step S402: Complete the self-test of the auxiliary power supply device in the power supply unit in sequence to confirm whether the fault on the medium voltage AC bus comes from the inside of the auxiliary power supply device;

[0109] Steps S401 and S402 are used to analyze and control the internal workings of the power supply unit, thereby confirming whether the fault on the medium-voltage AC bus originates from the internal workings of the auxiliary power supply device.

[0110] Step S403: Determine whether there is a second switch within the power supply unit that can disconnect the connection between the power supply unit and the main medium-voltage AC busbar from the inside of the power supply unit;

[0111] Step S404: If there is no second switch, disconnect the auxiliary power supply device in the power supply unit where the fault is located, keep the first switches corresponding to both sides of the power supply unit where the fault is located cut off and blocked, so that they are disconnected from the main medium voltage AC bus, and disconnect and block the auxiliary power supply device in the power supply unit where the fault is located where an internal short circuit fault has occurred.

[0112] Step S405: If a second switch exists and it is determined that the fault originates from inside the auxiliary power supply device, then disconnect and block the faulty auxiliary power supply device and the first and / or second switches located on both sides thereof.

[0113] In addition, in step S405, if a second switch exists and it is determined that the fault originates from outside the auxiliary power supply device, the fault section is separated within the power supply unit by the second switch to further investigate the location of the fault.

[0114] In this invention, two main methods can be used to further investigate the location of faults in the power supply unit:

[0115] Method 1: Based on the location information of the auxiliary power supply device and the second switch in the power supply unit where the fault is located, control the second switch in the power supply unit to open or close in sequence, and check the fault conditions in the fault section of the power supply unit one by one to accurately find the load that has the fault.

[0116] Method 2: Read the current data of the main medium-voltage AC bus corresponding to the power supply unit where the fault is located using a current sensor to identify the faulty section; if there is an auxiliary power supply device in the faulty section, disconnect the auxiliary power supply device in the faulty carriage from the main medium-voltage AC bus, keep the first switch and / or second switch corresponding to the faulty section disconnected and blocked, and close the first switch and / or second switch outside the faulty section, so that the main medium-voltage AC bus can provide normal power supply to the fault-free carriages.

[0117] Step S406: The load and the auxiliary power supply device that remains connected to the main medium-voltage AC bus and can supply power to the load can be reassembled into a power supply unit.

[0118] The reconfigured power supply unit may include a first switch and / or a second switch. After the above steps are completed, due to the blocking of some switches (the first switch and / or the second switch) and auxiliary power supply devices, the positions of the first switch and / or the second switch in the new power supply unit may change (i.e., the second switch in the original power supply unit becomes the first switch at the junction of two adjacent power supply units, or the first switch at the junction of two adjacent power supply units becomes the second switch in the new power supply unit). After being re-identified by the identification module of the main medium-voltage AC bus, the control closed loop can be re-formed.

[0119] The following are three specific embodiments of the control method for the medium-voltage AC bus of the present invention:

[0120] Example 1: The number of carriages in a train set and the connection status of the medium-voltage AC busbar equipment, such as... Figure 5 And as shown in Table 1,

[0121]

[0122] Table 1

[0123] This embodiment of the carriage assembly includes 8 carriages (i.e., carriages 01-08). One load (i.e., load 1) is installed on the main medium-voltage AC busbar opposite carriage 01. One load and one auxiliary power supply device (i.e., load 2 and auxiliary power supply device 1) are installed on the main medium-voltage AC busbar opposite carriage 02. One switch and one load (i.e., switch 1 and load 3) are installed on the main medium-voltage AC busbar opposite carriage 03. One auxiliary power supply device and one load are installed on the main medium-voltage AC busbar opposite carriage 04. (i.e., auxiliary power supply device 2 and load 4), one switch and one auxiliary power supply device (i.e., switch 2 and auxiliary power supply device 3) are installed on the main medium voltage AC bus opposite to carriage 05, two loads (i.e., load 5 and load 6) are installed on the main medium voltage AC bus opposite to carriage 06, one switch and one auxiliary power supply device (i.e., switch 3 and auxiliary power supply device 4) are installed on the main medium voltage AC bus opposite to carriage 07, and two loads (i.e., load 7 and load 8) are installed on the main medium voltage AC bus opposite to carriage 08.

[0124] Step S1: Identify the structure of the main medium-voltage AC bus. This involves identifying the equipment on the main medium-voltage AC bus based on the train's train communication network information grouping type, and identifying and sorting the locations of auxiliary power supply devices, switches, and loads on the main medium-voltage AC bus. The structure of the main medium-voltage AC bus is shown in Table 2.

[0125]

[0126] Table 2

[0127] Step S2: Based on the location information of each device on the main medium-voltage AC bus, process the location information of the auxiliary power supply devices, the first switch, and the load on it, and divide the main medium-voltage AC bus into multiple power supply units as shown in Table 3:

[0128]

[0129] Table 3

[0130] Step S3: Determine the power supply unit where the fault (short circuit fault) is located;

[0131] Specifically, after the equipment issues a short circuit fault alarm, it controls the three first switches (i.e., switch 1, switch 2 and switch 3) to open.

[0132] If the short circuit fault in this embodiment occurs at position 5 (i.e., load 3 of carriage 03), then after detection, it can be determined that there is no fault in power supply unit 1, power supply unit 3 and power supply 4, and that a short circuit fault occurs in power supply unit 2. At this time, the auxiliary power supply device in power supply unit 2 (i.e., auxiliary power supply device 2) performs a self-test. If it is determined after the self-test that it has not experienced a short circuit fault, then short circuit faults still exist in other positions in power supply unit 2.

[0133] Step S4: Keep the first switch (i.e., switch 1 and switch 2) corresponding to power supply unit 2 open, and close the first switch (i.e., switch 3) in power supply unit 4 where no short circuit fault has occurred; since there is no second switch in power supply unit 2 in this embodiment, each car only disconnects the auxiliary power supply device (i.e., auxiliary power supply device 2) in power supply unit 2 and disconnects the two first switches (i.e., switch 1 and switch 2) corresponding to power supply unit 2 in the current formation, so as to cut off the connection between power supply unit 2 and the main medium voltage AC bus.

[0134] Example 2: The number of carriages in a train set is determined by the connection status of the medium-voltage AC busbar equipment, such as... Figure 6 And as shown in Table 4,

[0135]

[0136] Table 4

[0137] This embodiment can be regarded as the fixed-formation rail vehicle in Embodiment 1 when the car formation changes (e.g., due to the need for transport capacity, two cars in Embodiment 1 are removed, thus forming a 6-car car formation structure). The carriage group in this embodiment is provided with 6 carriages (i.e., carriages 01-06). One load (i.e., load 1) is provided on the main medium-voltage AC bus opposite to carriage 01. One load and one auxiliary power supply device (i.e., load 2 and auxiliary power supply device 1) are provided on the main medium-voltage AC bus opposite to carriage 02. One switch, one auxiliary power supply device and one load (i.e., switch 1, auxiliary power supply device 2 and load 3) are provided on the main medium-voltage AC bus opposite to carriage 03. One load and one switch (i.e., load 4 and switch 2) are provided on the main medium-voltage AC bus opposite to carriage 04. One auxiliary power supply device and one load (i.e., auxiliary power supply device 3 and load 5) are provided on the main medium-voltage AC bus opposite to carriage 05. One load (i.e., load 6) is provided on the main medium-voltage AC bus opposite to carriage 06.

[0138] Step S1: Identify the structure of the main medium-voltage AC bus. This involves identifying the equipment on the main medium-voltage AC bus based on the train's train communication network information grouping type, and identifying and sorting the locations of auxiliary power supply devices, switches, and loads on the main medium-voltage AC bus. The structure of the main medium-voltage AC bus is shown in Table 5.

[0139]

[0140] Table 5

[0141] Step S2: Based on the location information of each device on the main medium-voltage AC bus, process the location information of the auxiliary power supply devices, the first switch, and the loads on them, and divide the main medium-voltage AC bus into multiple power supply units as shown in Table 6:

[0142]

[0143] Table 6

[0144] Step S3: Determine the power supply unit where the fault (short circuit fault) is located;

[0145] Specifically, after the equipment issues a short circuit fault alarm, both first switches (i.e., switch 1 and switch 2) are disconnected.

[0146] If the short circuit fault in this embodiment occurs at position 6 (i.e., load 3 of carriage 03), then after detection, it can be determined that there is no fault in power supply unit 1 and power supply unit 3, and that a short circuit fault occurs in power supply unit 2. At this time, the auxiliary power supply device in power supply unit 2 (i.e., auxiliary power supply device 2) performs a self-test. If it is determined after the self-test that it has not experienced a short circuit fault, then short circuit faults still exist in other positions in power supply unit 2.

[0147] Step S4: Keep the first switch (i.e., switch 1 and switch 2) corresponding to power supply unit 2 open. In this embodiment, there are no other first switches or second switches, so no other switches need to be activated. Since there is no second switch in power supply unit 2 in this embodiment, each car only needs to disconnect the auxiliary power supply device (i.e., auxiliary power supply device 2) in the current formation and disconnect the first switch (i.e., switch 1 and switch 2) corresponding to power supply unit 2 to cut off the connection between power supply unit 2 and the main medium-voltage AC bus.

[0148] Example 3: The number of carriages in the train set and the connection status of the medium-voltage AC busbar equipment, such as... Figure 7 And as shown in Table 7,

[0149]

[0150] Table 7

[0151] This embodiment of the carriage assembly includes 9 carriages (i.e., carriages 01-09). One load and one switch (i.e., load 1 and switch 1) are installed on the main medium-voltage AC busbar opposite carriage 01. One load, one auxiliary power supply device, and one switch (i.e., load 2, auxiliary power supply device 1, and switch 2) are installed on the main medium-voltage AC busbar opposite carriage 02. One first load and one switch (i.e., load 3 and switch 3) are installed on the main medium-voltage AC busbar opposite carriage 03. One load and one switch (i.e., load 4 and switch 4) are installed on the main medium-voltage AC busbar opposite carriage 04. One auxiliary power supply device, one load, and one switch (i.e., auxiliary power supply device 2, load 5, and switch 5) are installed on the main medium-voltage AC bus opposite to car 05. One auxiliary power supply device and one load (i.e., auxiliary power supply device 3 and load 6) are installed on the main medium-voltage AC bus opposite to car 06. One load (i.e., load 7) is installed on the main medium-voltage AC bus opposite to car 07. One auxiliary power supply device and one load (i.e., auxiliary power supply device 4 and load 8) are installed on the main medium-voltage AC bus opposite to car 08. One load (i.e., load 9) is installed on the main medium-voltage AC bus opposite to car 07.

[0152] Step S1: Identify the structure of the main medium-voltage AC bus. This involves identifying the equipment on the main medium-voltage AC bus based on the train's train communication network information grouping type, and identifying and sorting the locations of auxiliary power supply devices, switches, and loads on the main medium-voltage AC bus. The structure of the main medium-voltage AC bus is shown in Table 8.

[0153]

[0154] Table 8

[0155] Step S2: Based on the location information of each device on the main medium-voltage AC bus, process the location information of the auxiliary power supply devices, the first switch, the second switch, and the loads on them, and divide the main medium-voltage AC bus into multiple power supply units as shown in Table 9:

[0156]

[0157] Table 9

[0158] Step S3: Determine the power supply unit where the fault (short circuit fault) is located;

[0159] Specifically, after the equipment issues a short circuit fault alarm, the two first switches (i.e., switch 2 and switch 5) at the connection points of the two adjacent power supply units are disconnected.

[0160] If the short circuit fault in this embodiment occurs at position 1 (i.e., load 1 of carriage 01), position 8 (i.e., load 4 of carriage 04), and position 15 (i.e., load 7 of carriage 07), then after detection, it can be determined that power supply unit 1, power supply unit 2, and power supply unit 3 all have short circuit faults.

[0161] At this time, the auxiliary power supply device in power supply unit 1 (i.e., auxiliary power supply device 1) performs a self-test. If the self-test determines that it has not experienced a short circuit fault, then other locations in power supply unit 1 still have short circuit faults. The auxiliary power supply device in power supply unit 2 (i.e., auxiliary power supply device 2) performs a self-test. If the self-test determines that it has not experienced a short circuit fault, then other locations in power supply unit 2 still have short circuit faults. The multiple auxiliary power supply devices in power supply unit 3 (i.e., auxiliary power supply device 3 and auxiliary power supply device 4) perform self-tests respectively. If the self-test determines that it has not experienced a short circuit fault, then other locations in power supply unit 3 still have short circuit faults.

[0162] Since there are short circuit faults in power supply units 1, 2 and 3 except for the corresponding auxiliary power supply devices, it is necessary to disconnect the first switch corresponding to power supply units 1, 2 and 3 respectively (that is: power supply unit 1 corresponds to disconnect switch 2, power supply unit 2 corresponds to disconnect switches 2 and 5, and power supply unit 3 corresponds to disconnect switch 5).

[0163] Step S4: Since there is no second switch in the power supply unit 3, the connection between the auxiliary power supply device 3 and the auxiliary power supply device 4 in the power supply unit 3 and the main medium voltage AC bus is directly disconnected, and the first switch (i.e., switch 5) corresponding to the power supply unit 3 is disconnected, and the power supply unit 3 is disconnected from the main medium voltage AC bus.

[0164] Since both power supply unit 1 and power supply unit 2 contain a second switch, the fault locations in power supply unit 1 and power supply unit 2 can be further located, as follows:

[0165] For a short circuit fault in power supply unit 1, disconnect the second switch (i.e., switch 1) in power supply unit 1 and check each device in power supply unit 1 for short circuit faults one by one. After disconnecting the switch, load 2 and auxiliary power supply device 1 can be used normally, and the short circuit fault is eliminated. Therefore, the short circuit fault can be located in load 1. At this time, keep the second switch (i.e., switch 1) in power supply unit 1 in the open state and disconnect load 1 in power supply unit 1 from the main medium voltage AC bus.

[0166] For the short circuit fault in power supply unit 2, the location of the short circuit fault is checked one by one by controlling the closed / opening of the controllable AC switch device. The "switch 3" and "switch 4" inside the "minimum power supply unit 2" are disconnected in sequence. After the "switch 4" is disconnected, the short circuit fault is eliminated and the location of the fault is located at position 8. Keep the controllable AC switch devices on both sides disconnected (i.e., "switch 3" and "switch 4" are disconnected).

[0167] After the above processing, for short-circuit faults at loads 1, 4, and 7, the second switch in power supply unit 1 (i.e., switch 1) and the two second switches in power supply unit 2 (i.e., switches 3 and 4) can be disconnected respectively. The first switch in power supply unit 2 (i.e., switch 2) is then closed, thereby disconnecting all devices with short-circuit faults from the main medium-voltage AC bus. After this processing, load 2, auxiliary power supply device 1, switch 2, and load 3 can be reassembled into a power supply unit. Power supply device 1 will then supply power to loads 2 and 3. In this case, switch 2 changes from the first switch of the original power supply unit to the second switch of the new power supply unit. Additionally, auxiliary power supply device 2 and load 5 can be reassembled into a power supply unit. After connecting auxiliary power supply device 1 and auxiliary power supply device 2 to the main medium-voltage AC bus, power can be supplied to the corresponding loads, thus ensuring the normal operation of loads 2, 3, and 5.

[0168] The features and advantages of the control method for the medium-voltage AC bus of the present invention are as follows:

[0169] Compared with existing control methods that provide fixed rules for fixed-formation trains, this invention is applicable to both fixed and variable-formation trains with different configurations of carriage groups and the number of carriages. By identifying the structure of the main medium-voltage AC bus and multiple power supply units, the fault handling on the main medium-voltage AC bus is reduced to the fault location and handling of the power supply unit and the fault section within the power supply unit. This achieves carriage-level fault location, improves the efficiency and accuracy of fault analysis, and facilitates fault analysis and train maintenance.

[0170] Second, the control method for the medium-voltage AC bus can accurately locate faults and support fault isolation at the car level, thereby minimizing the impact of faults in the main medium-voltage AC bus on the normal operation of the train, reducing the impact of equipment failures on the main medium-voltage AC bus on the train, and improving passenger comfort.

[0171] Implementation Method 2

[0172] like Figure 8 As shown, the present invention provides a control device for a medium-voltage AC bus, comprising:

[0173] Busbar structure identification unit 100 is used to identify the structure of the main medium-voltage AC busbar;

[0174] The busbar structure optimization unit 200 is used to process the location information of the auxiliary power supply device, the first switch and / or the second power supply pipe on the main medium-voltage AC busbar and the load on the main medium-voltage AC busbar according to the identification result, and to divide the main medium-voltage AC busbar into multiple power supply units. Each power supply unit includes at least a load and an auxiliary power supply device for supplying power to the load, and a first switch that can disconnect the power supply unit from the main medium-voltage AC busbar is provided at the junction of two adjacent power supply units.

[0175] The fault preprocessing unit 300 is used to locate and process the power supply unit where the fault is located on the main medium-voltage AC bus, and disconnect the power supply unit where the fault is located from the main medium-voltage AC bus.

[0176] The fault handling unit 400 is used to analyze and control the internal structure of the power supply unit where the fault is located, locate and handle the fault section within the power supply unit where the fault is located, and disconnect the connection between the fault section where the fault is located and the main medium-voltage AC bus.

[0177] In an optional embodiment of the present invention, such as Figure 9 As shown, the busbar structure identification unit 100 includes:

[0178] The position identification module 1001 is used to identify and sort the positions of the load, auxiliary power supply device, first switch located at the junction of two adjacent power supply units and / or second switch located within the power supply unit on the main medium voltage AC bus.

[0179] Furthermore, the equipment on the main medium-voltage AC bus can be identified based on the train communication network information's grouping type, thereby enabling the identification of the carriage structure of fixed or variable-formation rail vehicles, and the identification of the locations of auxiliary power supply devices, switches (first and / or second switches), and loads on the main medium-voltage AC bus. The train communication network information includes train network topology information, train network direction information, carriage location information for auxiliary power supply devices, and carriage location information for controllable AC switchgear.

[0180] Furthermore, the locations of auxiliary power supply devices, switches, and loads on the main medium-voltage AC bus can be sorted along the main medium-voltage AC bus, and each device can be numbered from 1 to n along the main medium-voltage AC bus.

[0181] The location information acquisition module 1002 acquires the sorted location information of the load, the auxiliary power supply device, the first switch, and / or the second switch on the main medium-voltage AC bus. Specifically, the location information of each device can be obtained by sorting the locations of the auxiliary power supply devices, switches, and loads along the main medium-voltage AC bus, and then assigning corresponding numbers to each device.

[0182] In an optional embodiment of the present invention, such as Figure 10 As shown, the fault preprocessing unit 300 includes:

[0183] The first processing module 3001 is used to disconnect each first switch on the main medium-voltage AC bus to disconnect each power supply unit from the main medium-voltage AC bus.

[0184] The fault diagnosis module 3002 is used to determine whether each power supply unit has a fault.

[0185] The second processing module 3003 is used to close the corresponding first switch if the power supply unit does not malfunction, so that the power supply unit can be normally connected to the main medium voltage AC bus and continue to work.

[0186] The third processing module 3004 is used to keep the corresponding first switch open if a power supply unit fails, thereby disconnecting the faulty power supply unit from the main medium voltage AC bus.

[0187] In an optional embodiment of the present invention, such as Figure 11 As shown, the fault handling unit 400 includes:

[0188] Disconnect module 4001 is used to disconnect the auxiliary power supply device in the power supply unit where the fault occurs.

[0189] Self-test module 4002 is used to sequentially complete the self-test of the auxiliary power supply device in the power supply unit to confirm whether the fault on the medium voltage AC bus comes from the inside of the auxiliary power supply device.

[0190] Detection module 4003 is used to determine whether there is a second switch in the power supply unit that can disconnect the power supply unit from the main medium voltage AC bus by the internal components of the power supply unit;

[0191] The fourth processing module 4004 is used to disconnect the auxiliary power supply device in the power supply unit where the fault is located if there is no second switch, keep the first switches on both sides of the power supply unit where the fault is located cut off and blocked, disconnect them from the main medium voltage AC bus, and cut off and block the auxiliary power supply device in the power supply unit where the fault is located that has an internal short circuit fault.

[0192] The fifth processing module 4005 is used to cut off and block the faulty auxiliary power supply device and the first and / or second switches located on both sides of it if a second switch exists and it is determined that the fault comes from inside the auxiliary power supply device; or if a second switch exists and it is determined that the fault comes from outside the auxiliary power supply device, the fault section is separated in the power supply unit by the second switch to further investigate the location of the fault.

[0193] The features and advantages of the control device for the medium-voltage AC bus of the present invention are as follows:

[0194] The control device for this medium-voltage AC bus can reduce the fault handling on the main medium-voltage AC bus to the fault location and handling of the power supply unit and the fault section within the power supply unit by identifying the structure of the main medium-voltage AC bus and separating multiple power supply units. It can achieve fault location at the car level, improve the efficiency and accuracy of fault analysis, and facilitate fault analysis and train maintenance.

[0195] Implementation Method 3

[0196] The present invention provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-mentioned control method for a medium-voltage AC bus.

[0197] Specifically, the computer device can be a computer terminal, a server, or a similar computing device.

[0198] Implementation Method 4

[0199] The present invention provides a computer-readable storage medium storing a computer program that executes the above-described control method for a medium-voltage AC bus.

[0200] Specifically, computer-readable storage media include both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer-readable storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable storage media does not include transient media, such as modulated data signals and carrier waves.

[0201] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0202] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0203] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0204] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0205] The above description is merely an illustrative embodiment of the present invention and is not intended to limit the scope of the invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. A control method for a medium-voltage AC busbar, applied to the auxiliary power supply system of a rail vehicle, characterized in that, The rail vehicle has at least one car group, each car group includes multiple cars, and the output terminal of the auxiliary power supply device corresponding to each car is connected to the main medium-voltage AC bus. The control method of the medium-voltage AC bus includes the following steps: Identify the structure of the total medium-voltage AC busbar; Based on the identification results, multiple power supply units are divided into sections on the main medium-voltage AC bus. Each power supply unit includes at least a load and an auxiliary power supply device for supplying power to the load. A first switch is provided at the junction of two adjacent power supply units to disconnect the power supply unit from the main medium-voltage AC bus. Locate and handle the power supply unit where the fault is located on the main medium-voltage AC bus, and disconnect the power supply unit where the fault is located from the main medium-voltage AC bus; The internal structure of the power supply unit where the fault is located is analyzed and controlled, the fault section within the power supply unit where the fault is located is located and handled, and the connection between the fault section where the fault is located and the main medium voltage AC bus is cut off. The step of analyzing and controlling the internal structure of the power supply unit where the fault occurs, locating and handling the faulty section within the power supply unit, and disconnecting the faulty section from the main medium-voltage AC bus includes: Disconnect the auxiliary power supply device within the power supply unit where the fault occurs; The self-test of the auxiliary power supply device in the power supply unit is completed sequentially to confirm whether the fault on the medium-voltage AC bus comes from the inside of the auxiliary power supply device. Determine whether there is a second switch within the power supply unit that can disconnect the power supply unit from the main medium-voltage AC busbar from the inside of the power supply unit; If the second switch is not present, disconnect the auxiliary power supply device in the power supply unit where the fault is located, keep the first switches corresponding to both sides of the power supply unit where the fault is located cut off and blocked, disconnect them from the main medium voltage AC bus, and cut off and block the auxiliary power supply device in the power supply unit where the fault is located that has an internal short circuit fault. If the second switch exists and it is determined that the fault originates from inside the auxiliary power supply device, then the faulty auxiliary power supply device and the first and / or second switches located on both sides thereof are disconnected and blocked; or if the second switch exists and it is determined that the fault originates from outside the auxiliary power supply device, then the faulty section is separated within the power supply unit by the second switch to further investigate the location of the fault.

2. The control method for a medium-voltage AC bus as described in claim 1, characterized in that, The identification of the total medium-voltage AC bus structure includes: Identify and sort the positions of the load, the auxiliary power supply device, the first switch located at the junction of two adjacent power supply units, and / or the second switch located within the power supply unit on the total medium-voltage AC bus. Obtain the position information of the sorted load, the auxiliary power supply device, the first switch and / or the second switch on the main medium voltage AC bus.

3. The control method for a medium-voltage AC bus as described in claim 1, characterized in that, In the case where multiple power supply units are separated from the main medium-voltage AC bus, after the first switch corresponding to the power supply unit is turned off, electrical isolation is formed between the power supply unit and the main medium-voltage AC bus.

4. The control method for a medium-voltage AC bus as described in claim 3, characterized in that, The number of first switches between two adjacent power supply units is at least one, and the first switches are located on the total medium-voltage AC bus.

5. The control method for a medium-voltage AC bus as described in claim 3, characterized in that, The step of locating and handling the power supply unit where the fault is located on the main medium-voltage AC bus, and disconnecting the power supply unit where the fault is located from the main medium-voltage AC bus, includes: Disconnect each of the first switches on the main medium-voltage AC bus to disconnect each of the power supply units from the main medium-voltage AC bus; Determine whether each of the power supply units has malfunctioned; If the power supply unit does not malfunction, then the corresponding first switch is closed; If the power supply unit fails, the corresponding first switch remains open.

6. The control method for a medium-voltage AC bus as described in claim 1, characterized in that, The further investigation of the fault location includes: according to the location information of the auxiliary power supply device and the second switch in the power supply unit where the fault is located, sequentially controlling the second switch in the power supply unit to open or close, and checking the fault conditions in the fault section of the power supply unit where the fault is located one by one.

7. The control method for a medium-voltage AC bus as described in claim 1, characterized in that, Further investigation into the location of the fault includes: Read the current data of the main medium-voltage AC bus corresponding to the power supply unit where the fault is located to identify the fault section; If the auxiliary power supply device exists in the fault section, disconnect the auxiliary power supply device in the carriage where the fault is located from the main medium-voltage AC bus, keep the first switch and / or the second switch corresponding to the fault section where the fault is located disconnected and blocked, and close the first switch and / or the second switch outside the fault section.

8. The control method for a medium-voltage AC bus as described in claim 1, characterized in that, After further investigating the location of the fault, the process also includes: The loads on the main medium-voltage AC bus and the auxiliary power supply device connected to the main medium-voltage AC bus and capable of supplying power to the loads are reassembled into a power supply unit.

9. A control device for a medium-voltage AC busbar, characterized in that, include: Busbar structure identification unit, used to identify the structure of the main medium-voltage AC busbar; The busbar structure optimization unit is used to divide the total medium-voltage AC busbar into multiple power supply units according to the identification results. Each power supply unit includes at least a load and an auxiliary power supply device for supplying power to the load. A first switch is provided at the junction of two adjacent power supply units to disconnect the power supply unit from the total medium-voltage AC busbar. The fault preprocessing unit is used to locate and process the power supply unit where the fault is located on the main medium-voltage AC bus, and disconnect the power supply unit where the fault is located from the main medium-voltage AC bus. The fault handling unit is used to analyze and control the internal structure of the power supply unit where the fault is located, locate and handle the fault section within the power supply unit where the fault is located, and disconnect the fault section from the main medium-voltage AC bus. The fault handling unit includes: Disconnect module, used to disconnect the auxiliary power supply device in the power supply unit where the fault occurs; The self-test module is used to sequentially complete the self-test of the auxiliary power supply device in the power supply unit to confirm whether the fault on the medium voltage AC bus comes from the inside of the auxiliary power supply device. The detection module is used to determine whether there is a second switch in the power supply unit that can disconnect the power supply unit from the main medium-voltage AC bus by the inside of the power supply unit; The fourth processing module is used to disconnect the auxiliary power supply device in the power supply unit where the fault is located if the second switch is not present, keep the first switches corresponding to both sides of the power supply unit where the fault is located cut off and blocked, so that they are disconnected from the main medium voltage AC bus, and cut off and block the auxiliary power supply device in the power supply unit where the fault is located that has an internal short circuit fault. The fifth processing module is used to, if the second switch exists and it is determined that the fault originates from inside the auxiliary power supply device, cut off and block the faulty auxiliary power supply device and the first switch and / or the second switch located on both sides thereof; or if the second switch exists and it is determined that the fault originates from outside the auxiliary power supply device, the second switch is used to separate the faulty section within the power supply unit to further investigate the location of the fault.

10. The control device for a medium-voltage AC bus as described in claim 9, characterized in that, The busbar structure identification unit includes: The position identification module is used to identify and sort the positions of the load, the auxiliary power supply device, the first switch located at the junction of two adjacent power supply units and / or the second switch located within the power supply unit on the total medium voltage AC bus. The location information acquisition module is used to acquire the location information of the sorted load, the auxiliary power supply device, the first switch and / or the second switch on the total medium voltage AC bus.

11. The control device for a medium-voltage AC bus as described in claim 9, characterized in that, The fault preprocessing unit includes: The first processing module is used to disconnect each of the first switches on the main medium-voltage AC bus to disconnect each of the power supply units from the main medium-voltage AC bus. The fault diagnosis module is used to determine whether each of the power supply units has failed. The second processing module is used to close the corresponding first switch if the power supply unit does not malfunction. The third processing module is used to keep the corresponding first switch off if the power supply unit fails.

12. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the control method for the medium-voltage AC bus according to any one of claims 1 to 8.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that performs the control method for the medium-voltage AC bus according to any one of claims 1 to 8.

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