Closing interlocking automatic control method and device, electronic equipment and storage medium

Abstract

The invention discloses a switching-on interlocking automatic control method and device, electronic equipment and a storage medium, and the method comprises the steps: collecting the voltage signals of a bus, an adjacent bus and an incoming line in real time, obtaining the transformer capacity and load of each bus, calculating the rated current and load rate of each bus, and calculating the current and load rate of each bus; normally open / normally closed contact states of an incoming line switch, a bus tie switch and a construction power switch are detected, when it is detected that a bus loses voltage, switching-on interlocking logic of a target switch is generated based on incoming line voltage, switching-on and switching-off states of an associated switch and a load rate comparison result, and the target switch comprises the incoming line switch, the bus tie switch or the construction power switch. The contact signal corresponding to the switching-on interlocking logic is serially connected to the switching-on loop of the target switch to execute switching-on interlocking automatic control on the target switch, so that cable access can be effectively reduced, the locking efficiency is improved, the use of a repeat relay can be reduced, and the reliability is improved.

Description

Technical Field

[0001] This invention relates to the field of power system relay protection technology, specifically to an automatic control method, device, electronic equipment, and storage medium for closing interlocking. Background Technology

[0002] Closing interlocks are a crucial component of relay protection in power systems. Their core function is to ensure that circuit breaker closing operations are performed only when specific conditions are met, through logical or mechanical interlocking mechanisms. For example, before closing, it is necessary to verify the status of disconnecting switches, whether grounding switches are open, and the energized status of equipment to avoid risks such as operation under load, asynchronous paralleling, or accidental energization to fault areas. Closing interlocks are widely used in substations, distribution networks, and power plants, and are a key technology for ensuring the safe operation of the system.

[0003] Currently, traditional switching interlocking mainly relies on two types of technologies: mechanical interlocking, which restricts the operation sequence through physical structures (such as locks and linkages) and requires manual intervention; and electrical interlocking, which uses relays, auxiliary contacts, etc., to form a fixed logic circuit that directly links to the status of primary equipment. However, these two traditional switch switching interlocking methods have low reliability, poor flexibility and scalability, are difficult to maintain and diagnose, and pose significant risks to manual operation.

[0004] Therefore, the closing interlocking control method needs further optimization. Summary of the Invention

[0005] In view of the above problems, the present invention provides an automatic control method, device, electronic device and storage medium for closing interlocking. By automatically combining the closing interlocking circuit of the switch that needs to be closed and connecting the contacts of the closing interlocking circuit in series to the closing switch circuit, the automatic control function of closing interlocking is realized. This can effectively reduce the number of cables connected, improve the interlocking efficiency, reduce the use of re-operating relays and improve reliability.

[0006] In a first aspect, embodiments of the present invention provide an automatic control method for closing interlocking, comprising: Real-time acquisition of voltage signals from this busbar, adjacent busbars, and incoming lines; Obtain the transformer capacity and load of each busbar, and calculate the rated current and load factor of each busbar; Check the status of normally open / normally closed contacts of incoming line switches, bus tie switches, and construction power switches; When a loss of voltage is detected on the main bus, the closing and opening status of the associated switch and the load rate comparison result are used to generate the closing interlocking logic of the target switch. The target switch includes the incoming switch, the bus tie switch or the construction power switch. The contact signal corresponding to the closing interlocking logic is connected in series to the closing circuit of the target switch to perform automatic control of the closing interlocking of the target switch.

[0007] In some embodiments, the closing interlocking logic for generating the target switch includes the following closing conditions for the incoming switch: This busbar is uncharged while the incoming line is pressurized; The normally open bus tie switch, the normally closed bus tie switch on the opposite side, and the construction power switch of this busbar are all in the open state.

[0008] In some embodiments, the closing interlocking logic for generating the target switch includes the following closing conditions for the bus tie switch: This busbar is pressurized and the adjacent busbar is unpressurized; The incoming line switch, normally open bus tie switch and construction power switch of the adjacent busbar are all in the open state; The normally closed bus coupler switch of the adjacent busbar is in the closed state; The rated current of this busbar is greater than or equal to the sum of the load currents of this busbar and the adjacent busbar; The load rate when this bus is powered is less than or equal to the load rate when another power source powers the adjacent bus.

[0009] In some embodiments, the closing interlocking logic for generating the target switch includes the following closing conditions for the construction power switch: The incoming line switch, the normally open bus tie switch of this section of the bus, and the normally closed bus tie switch on the opposite side are all in the open state.

[0010] In some embodiments, calculating the rated current and load factor of each bus includes: Calculate the rated current based on the rated capacity of the bus transformer; Calculate the load current based on the actual load on the busbar; The load factor is calculated by the ratio of the load current to the rated current to determine whether the busbar is lightly or heavily loaded.

[0011] In some embodiments, detecting the normally open / normally closed contact status of the incoming line switch, bus tie switch, and construction power switch includes: The position status of the circuit breaker and disconnector is detected by the auxiliary contacts of the switch. The auxiliary contacts are used to indicate, control and make logical judgments about the switch status.

[0012] In some embodiments, the real-time acquisition of voltage signals from the local bus, adjacent buses, and incoming lines includes: Collect the AB phase voltages of the PTs of this busbar, the AB phase voltages of the PTs of adjacent busbars, and the AB phase voltages of the PTs of the incoming lines to determine the voltage status of each busbar and incoming line.

[0013] Secondly, embodiments of the present invention provide an automatic closing interlocking control device, the automatic closing interlocking control device comprising: The acquisition module is used to acquire voltage signals from this busbar, adjacent busbars, and incoming lines in real time. The acquisition module is used to acquire the capacity and load of each bus transformer, and to calculate the rated current and load rate of each bus. The detection module is used to detect the status of normally open / normally closed contacts of incoming line switches, bus tie switches, and construction power switches. The logic generation module is used to generate the closing interlocking logic of the target switch based on the incoming line being energized, the opening and closing status of the associated switch, and the load rate comparison result when the loss of voltage of this bus is detected. The target switch includes the incoming line switch, the bus tie switch, or the construction power switch. The control module is used to connect the contact signal corresponding to the closing interlock logic in series to the closing circuit of the target switch to perform automatic control of the closing interlock of the target switch.

[0014] Thirdly, embodiments of this application provide an electronic device, including a memory and a processor, wherein the memory stores program code that can run on the processor, and when the program code is executed by the processor, it implements the automatic control method for closing interlocking as described in any embodiment of the first aspect.

[0015] Fourthly, embodiments of this application provide a computer storage medium storing one or more programs, which can be executed by an electronic device as described in the third aspect to implement the automatic control method for interlocking closing as described in any embodiment of the first aspect.

[0016] This invention provides an automatic control method, device, electronic equipment, and storage medium for interlocking closing. The method includes real-time acquisition of voltage signals from the current busbar, adjacent busbars, and incoming lines; obtaining the transformer capacity and load of each busbar; calculating the rated current and load rate of each busbar; detecting the normally open / normally closed contact status of incoming line switches, bus tie switches, and construction power switches; and generating interlocking logic for a target switch based on incoming line voltage, the opening and closing status of associated switches, and a load rate comparison when a loss of voltage is detected on the current busbar. The target switch includes an incoming line switch, bus tie switch, or construction power switch. Contact signals corresponding to the interlocking logic are connected in series to the closing circuit of the target switch to execute automatic interlocking control of the target switch. By automatically combining the interlocking circuits of the switches requiring closing and connecting the contacts of these interlocking circuits in series to the closing switch circuit, the automatic interlocking control function is achieved. This effectively reduces cable access, improves interlocking efficiency, and reduces the use of re-operating relays.

[0017] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0018] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0019] Figure 1 A schematic flowchart of an exemplary automatic control method for closing interlocking is shown in one embodiment of the present invention. Figure 2 A schematic diagram of an exemplary 10kV system plant interconnection diagram according to an embodiment of the present invention is shown. Figure 3 An exemplary closing logic diagram of switch KM1 according to an embodiment of the present invention is shown; Figure 4 An exemplary closing circuit diagram of switch KM1 according to an embodiment of the present invention is shown; Figure 5 An exemplary closing logic diagram of switch KM2 according to an embodiment of the present invention is shown; Figure 6 An exemplary closing circuit diagram of switch KM2 according to an embodiment of the present invention is shown; Figure 7 An exemplary closing logic diagram of switch KM5 according to an embodiment of the present invention is shown; Figure 8 An exemplary closing circuit diagram of switch KM5 according to an embodiment of the present invention is shown; Figure 9 An exemplary closing logic diagram of switch KM6 according to an embodiment of the present invention is shown; Figure 10 An exemplary closing circuit diagram of switch KM6 according to an embodiment of the present invention is shown; Figure 11 The diagram shows a structural block diagram of an automatic closing interlocking control device according to an embodiment of the present invention. Figure 12 A structural block diagram of an electronic device for performing an automatic closing interlocking control method according to an embodiment of this application is shown. Figure 13 This application illustrates a computer-readable storage medium for storing or carrying an automatic closing interlocking control method according to an embodiment of this application. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0021] Currently, traditional switching interlocking mainly relies on two types of technologies: mechanical interlocking, which restricts the operation sequence through physical structures (such as locks and linkages) and requires manual intervention; and electrical interlocking, which uses relays, auxiliary contacts, etc., to form a fixed logic circuit that directly links to the status of primary equipment. However, these two traditional switch switching interlocking methods have low reliability, poor flexibility and scalability, are difficult to maintain and diagnose, and pose significant risks to manual operation.

[0022] Taking a certain power station as an example, there are four switches on the 1M line as main incoming line switches or tie switches. To prevent asynchronous closing, generally only 1-2 switches are allowed to be closed according to the power supply method, ensuring that only one power source is connected to a single bus section at any time. The drawbacks of this method are quite prominent: 1. There are many cables, which pose a risk of secondary circuit failure and thus lockout failure.

[0023] Currently, this wiring method requires the connection of auxiliary contacts of a multi-way switch, resulting in a large number of wiring cables. After a certain service life, there is a risk of secondary circuit failure. When one auxiliary contact fails, the interlocking fails, causing asynchronous closing.

[0024] 2. The use of re-operating relays results in poor reliability.

[0025] Since the entire synchronization circuit requires the use of multiple sets of auxiliary contacts of the same switch, the number of auxiliary contacts of the original switch cannot meet the requirements, and it can only be achieved through a re-operation relay, which has poor reliability.

[0026] 3. Other issues: The circuit breaker position contacts currently used in the field are connected in series to the closing interlocking circuit, which has the problem that the position status of each circuit breaker and the bus voltage cannot be displayed intuitively. It also does not have event recording and waveform recording functions, which is not convenient for accident analysis.

[0027] Based on this, this application provides an automatic control method, device, electronic equipment, and storage medium for closing interlocking. Addressing the problems of asynchronous closing and low reliability that may occur with traditional closing interlocking methods, this invention automatically combines the closing interlocking circuits of the required closing switch and connects the contacts of these closing interlocking circuits in series with the closing switch circuit, thereby achieving the function of automatic closing interlocking control. This method effectively reduces cable connections, improves interlocking efficiency, and also reduces the use of re-operating relays, thus improving reliability.

[0028] The automatic control method for closing interlocking will be described in detail in subsequent embodiments.

[0029] The following describes the application scenarios of the automatic closing interlocking control method provided in the embodiments of the present invention: Please see Figure 1 , Figure 1 This is a schematic flowchart of an automatic closing interlocking control method provided in an embodiment of the present invention. In this embodiment, the automatic closing interlocking control method can be applied to, for example... Figure 11 The automatic control device 300 for closing interlocking shown is neutral. Figure 12 In the electronic device 200 shown, the following is specifically for... Figure 1 The process shown is described in detail. This automatic control method for closing interlocking may include steps S110 to S150.

[0030] S110: Real-time acquisition of voltage signals from this busbar, adjacent busbars, and incoming lines.

[0031] S120: Obtain the capacity and load of each bus transformer, and calculate the rated current and load rate of each bus.

[0032] In this embodiment of the application, when the system is running normally, the capacity and load of each bus transformer are collected, and the rated current of each bus section is calculated; the status of the normally open and normally closed contacts of the incoming line switches (KM1, KM4), the normally open and normally closed contacts of the bus tie switches of this bus (KM2, KM3), the normally open and normally closed contacts of the construction power switch (KM6), and the normally open and normally closed contacts of the bus tie switches of the next bus section (KM5, KM7, KM8) are monitored in real time to prepare for closing interlocking.

[0033] S130: Detects the status of normally open and / or normally closed contacts of incoming line switches, bus tie switches, and construction power switches.

[0034] S140: When a loss of voltage is detected on this busbar, based on the incoming line being energized, the opening and closing status of the associated switches, and the load rate comparison results, the closing interlocking logic of the target switch is generated. The target switch includes the incoming line switch, the bus tie switch, or the construction power switch.

[0035] S150: The contact signal corresponding to the closing interlocking logic is connected in series to the closing circuit of the target switch to perform automatic control of the closing interlocking of the target switch.

[0036] In the above embodiments, taking the 1M, 2M, and 3M power supply system as an example, the closing conditions of the incoming line switch (KM1) are as follows: the 1M busbar is de-energized and the incoming line is energized, and at the same time, the normally open bus tie switch (KM2), the normally closed bus tie switch opposite side (KM3), and the construction power switch (KM6) of the 1M busbar are disconnected; the closing conditions of the normally open bus tie switch (KM2) of the 1M busbar are as follows: the 1M busbar is energized and the next section of the 2M busbar is de-energized, the incoming line switch (KM4), the normally open bus tie switch (KM5), and the construction power switch (KM6) of the next section of the 2M busbar are disconnected, and at the same time, the normally closed bus tie switch (KM7) of the next section of the 2M busbar is in the closed position. At this time, the current generated by the loads of 1M and 2M should not be greater than the rated current of 1M, and the load rate of 1M and 2M powered only by 1M should be less than or equal to the load rate of 3M and 2M powered only by 3M.

[0037] The closing conditions for the normally open bus tie switch (KM5) of the next bus section are: 2M is de-energized and 3M is energized; the normally open bus tie switch (KM2) of this bus section and the incoming switch (KM4) of the next bus section are disconnected; the normally closed bus tie switch (KM8) of 3M is closed; and at this time, the current generated by the loads of 3M and 2M should not exceed the rated current of 3M; and the load rate of 3M and 2M powered only by 3M should be less than or equal to the load rate of 1M and 2M powered only by 1M. The closing conditions for the construction power switch (KM6) are: the incoming switch (KM1), the normally open bus tie switch (KM2) of this bus section and the switch (KM3) on the opposite side of the normally closed bus tie of this bus section are disconnected. Taking 1M, 2M, and 3M as examples, this can be deduced and applied to any three adjacent bus sections in a 10KV power supply system.

[0038] In this embodiment of the application, the function of automatic control of closing interlock is achieved by combining the closing interlock circuit of the switch that needs to be closed and connecting the contacts of the closing interlock circuit in series to the closing switch circuit.

[0039] It should be noted that, in this embodiment of the application, three sets of PT sampling units can be used: respectively connected to the PT of this bus, the PT of the adjacent bus, and the incoming line PT, see reference. Figure 2 The diagram shown is an exemplary 10kV system plant interconnection diagram.

[0040] In some embodiments, S110 includes real-time acquisition of voltage signals from the current bus, adjacent bus, and incoming lines, including: Collect the AB phase voltages of the PTs of this busbar, the AB phase voltages of the PTs of adjacent busbars, and the AB phase voltages of the PTs of the incoming lines to determine the voltage status of each busbar and incoming line.

[0041] In this embodiment, the voltages measured by the device include the AB phase voltage on the 1M PT of this busbar; the AB phase voltage on the 2M PT of the adjacent busbar; the AB phase voltage on the 3M PT of the adjacent busbar; the AB phase voltage on the 1 PT of line; the AB phase voltage on the 2 PT of line; and the rated capacity of the 1M, 2M, and 3M transformers. , , and their respective load capacities , , ,pass The rated current of each busbar can be obtained, through The bus current can be obtained, through By obtaining the load rate, it is possible to determine whether each bus is under heavy or light load.

[0042] In some embodiments, detecting the normally open / normally closed contact status of the incoming line switch, bus tie switch, and construction power switch includes: The position status of circuit breakers and disconnectors is detected by auxiliary contacts of the switch. The auxiliary contacts are used to indicate, control, and make logical judgments about the switch status.

[0043] In this embodiment, multiple switches are auxiliary contacts that can characterize the position and status of primary equipment (circuit breakers, disconnect switches, etc.) and can perform functions such as indication, control, and logical judgment.

[0044] For details, please refer to Figure 4 The exemplary closing circuit diagram of switch KM1 shown includes: a contact series unit that converts interlocking logic into normally open / normally closed contact signals; and a closing circuit interface that is directly connected to the circuit breaker closing coil.

[0045] In some embodiments, the closing interlocking logic for generating the target switch includes the following closing conditions for the incoming switch: This busbar is uncharged while the incoming line is pressurized; The normally open bus tie switch, the normally closed bus tie switch on the opposite side, and the construction power switch of this busbar are all in the open state.

[0046] The corresponding logical relationship diagram can be found in [reference]. Figure 3 The example switch KM1 closing logic diagram is shown.

[0047] In this embodiment, the closing conditions for switch KM1 are: 1M is de-energized, line 1 is energized, and switches KM2, KM3, and KM6 are in the open position. At this time, 1M is powered solely by the power supply on line 1.

[0048] In some embodiments, the closing interlocking logic for generating the target switch includes the following closing conditions for the bus tie switch: This busbar is pressurized and the adjacent busbar is unpressurized; The incoming line switch, normally open bus tie switch and construction power switch of the adjacent busbar are all in the open state; The normally closed bus coupler switch of the adjacent busbar is in the closed state; The rated current of this busbar is greater than or equal to the sum of the load currents of this busbar and the adjacent busbar; The load rate when this bus is powered is less than or equal to the load rate when another power source powers the adjacent bus.

[0049] The corresponding logic diagram can be found in [reference]. Figure 5 The diagram shows an exemplary closing logic diagram for switch KM2.

[0050] In the embodiments of this application, see the following: Figure 6 The diagram shows an exemplary closing circuit for switch KM2. The closing conditions for switch KM2 are: 2M is de-energized, 1M is energized, switches KM4, KM5, and KM6 are in the open position, switch KM7 is in the closed position, and the rated current of 1M should be greater than the sum of the load currents of 1M and 2M. At the same time, the load factor of 1M should be less than that of 3M, that is, At this time, 1M supplies power to 2M.

[0051] In some embodiments, the closing conditions of the construction power switch in the closing interlocking logic of the target switch include: The incoming line switch, the normally open bus tie switch of this section of the bus, and the normally closed bus tie switch on the opposite side are all in the open state.

[0052] The logic diagram corresponding to the closing conditions of the construction power switch is shown below. Figure 9 The example switch KM6 closing logic diagram is shown.

[0053] The calculation of the rated current and load factor of each busbar includes: calculating the rated current based on the rated capacity of the busbar transformer; calculating the load current based on the actual load of the busbar; and calculating the load factor by the ratio of the load current to the rated current to determine whether the busbar is lightly or heavily loaded.

[0054] The corresponding logic diagram can be found in [reference]. Figure 7 The diagram shown is an exemplary closing logic diagram for switch KM5. In the embodiments of this application, see the following: Figure 8 The diagram shows an exemplary closing circuit for switch KM5. The closing conditions for switch KM5 are: 2M is de-energized, 3M is energized, switches KM2 and KM4 are in the open position, switch KM8 is in the closed position, and the rated current of 3M should be greater than the sum of the load currents of 3M and 2M. At the same time, the load factor of 3M should be less than that of 1M, that is At this time, 3M supplies power to 2M.

[0055] See Figure 10 The diagram shows an exemplary circuit diagram for closing switch KM6. The conditions for closing switch KM6 (i.e., the construction power supply) are: switches KM1, KM2, and KM3 are in the open position. At this time, power is supplied to 1M solely by the construction power supply.

[0056] In summary, the automatic control method for closing interlocking proposed in this application achieves intelligent control of the 10kV switch closing interlocking circuit. Addressing the shortcomings of complex busbar circuits and numerous switch contact circuits in the field, it intelligently identifies the switches requiring closing, reducing the risk of closing failure due to wiring faults. Simultaneously, it centrally collects the voltage and position contacts of all line switches, selects the number of switches requiring interlocking through device settings, and allows arbitrary selection of the normally open and normally closed contacts of the interlocking switches, thus enabling arbitrary combinations of switch closing interlocking circuits.

[0057] Please see Figure 11 , Figure 11 A structural block diagram of a closing interlocking automatic control device provided by the present invention includes: a data acquisition module 310, an acquisition module 320, a detection module 330, a logic generation module 340, and a control module 350, wherein: The acquisition module 310 is used to acquire voltage signals of this bus, adjacent bus and incoming lines in real time; The acquisition module 320 is used to acquire the capacity and load of each bus transformer, and to calculate the rated current and load rate of each bus. The detection module 330 is used to detect the status of the normally open / normally closed contacts of the incoming line switch, bus tie switch and construction power switch; The logic generation module 340 is used to generate the closing interlocking logic of the target switch based on the incoming line being energized, the opening and closing status of the associated switch, and the load rate comparison result when the loss of voltage of this bus is detected. The target switch includes the incoming line switch, the bus tie switch, or the construction power switch. The control module 350 is used to connect the contact signal corresponding to the closing interlock logic in series to the closing circuit of the target switch to perform automatic control of the closing interlock of the target switch.

[0058] It should be noted that the device embodiments in this invention correspond to the aforementioned method embodiments. The specific principles in the device embodiments can be found in the content of the aforementioned method embodiments, and will not be repeated here.

[0059] In the several embodiments provided in this example, the coupling between modules can be electrical, mechanical, or other forms of coupling.

[0060] Furthermore, the functional modules in the various embodiments of the present invention can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0061] Please see Figure 12 , Figure 12 The present application provides a structural block diagram of an electronic device 200 that can perform the above-described automatic control method for closing interlocking. The electronic device 200 may be a smartphone, tablet computer, computer, or portable computer.

[0062] The electronic device 200 also includes a processor 202 and a memory 204. The memory 204 stores programs that can execute the contents of the foregoing embodiments, and the processor 202 can execute the programs stored in the memory 204.

[0063] The processor 202 may include one or more cores for data processing and message matrix units. The processor 202 connects to various parts of the electronic device 200 using various interfaces and lines, and performs various functions and processes data by running or executing instructions, programs, code sets, or instruction sets stored in the memory 204, and by calling data stored in the memory 204. Optionally, the processor 202 may be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 202 may integrate one or more of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), and modem / decoder. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the displayed content; and the modem is used for wireless communication. It is understood that the modem / decoder may also not be integrated into the processor and may be implemented separately through a communication chip.

[0064] Memory 204 may include random access memory (RAM) or read-only memory (ROM). Memory 204 can be used to store instructions, programs, code, code sets, or instruction sets. Memory 204 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for implementing at least one function (e.g., instructions for a user to obtain random numbers), instructions for implementing the various method embodiments described below, etc. The data storage area may also store data (e.g., random numbers) created by the terminal during use.

[0065] Electronic device 200 may also include a network module and a screen. The network module is used to receive and transmit electromagnetic waves, converting electromagnetic waves into electrical signals, thereby enabling communication with communication networks or other devices, such as audio playback devices. The network module may include various existing circuit elements used to perform these functions, such as antennas, radio frequency transceivers, digital signal processors, encryption / decryption chips, SIM cards, memory, etc. The network module can communicate with various networks such as the Internet, corporate intranets, and wireless networks, or communicate with other devices via wireless networks. The aforementioned wireless networks may include cellular telephone networks, wireless local area networks, or metropolitan area networks. The screen can display interface content and facilitate data interaction.

[0066] Please refer to Figure 13 , Figure 13 This diagram illustrates a structural block diagram of a computer-readable storage medium according to an embodiment of this application. The computer-readable storage medium 400 stores program code 410, which can be called by a processor to execute the methods described in the above method embodiments.

[0067] The computer-readable storage medium 400 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. Optionally, the computer-readable storage medium includes a non-transitory computer-readable storage medium. The computer-readable storage medium 400 has storage space for program code 410 that performs any of the method steps described above. This program code 410 can be read from or written to one or more computer program products. The program code 410 may be compressed, for example, in a suitable form.

[0068] This application also provides a computer program product or computer program that includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the automatic closing interlocking control method described in the various optional implementations above.

[0069] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic control method for closing interlocking, characterized in that, The method includes: Real-time acquisition of voltage signals from this busbar, adjacent busbars, and incoming lines; Obtain the transformer capacity and load of each busbar, and calculate the rated current and load factor of each busbar; Check the status of normally open / normally closed contacts of incoming line switches, bus tie switches, and construction power switches; When a loss of voltage is detected on the main bus, the closing and opening status of the associated switch and the load rate comparison result are used to generate the closing interlocking logic of the target switch. The target switch includes the incoming switch, the bus tie switch or the construction power switch. The contact signal corresponding to the closing interlocking logic is connected in series to the closing circuit of the target switch to perform automatic control of the closing interlocking of the target switch.

2. The automatic control method for closing interlocking according to claim 1, characterized in that, In the closing interlocking logic for generating the target switch, the closing conditions for the incoming switch include: This busbar is uncharged while the incoming line is pressurized; The normally open bus tie switch, the normally closed bus tie switch on the opposite side, and the construction power switch of this busbar are all in the open state.

3. The automatic control method for closing interlocking according to claim 1, characterized in that, In the closing interlocking logic for generating the target switch, the closing conditions for the bus tie switch include: This busbar is pressurized and the adjacent busbar is unpressurized; The incoming line switch, normally open bus tie switch and construction power switch of the adjacent busbar are all in the open state; The normally closed bus coupler switch of the adjacent busbar is in the closed state; The rated current of this busbar is greater than or equal to the sum of the load currents of this busbar and the adjacent busbar; The load rate when this bus is powered is less than or equal to the load rate when another power source powers the adjacent bus.

4. The automatic control method for closing interlocking according to claim 1, characterized in that, In the closing interlocking logic of the target switch generation, the closing conditions of the construction power switch include: The incoming line switch, the normally open bus tie switch of this section of the bus, and the normally closed bus tie switch on the opposite side are all in the open state.

5. The automatic control method for closing interlocking according to claim 2, characterized in that, The calculation of the rated current and load factor of each busbar includes: Calculate the rated current based on the rated capacity of the bus transformer; Calculate the load current based on the actual load on the busbar; The load factor is calculated by the ratio of the load current to the rated current to determine whether the busbar is lightly or heavily loaded.

6. The automatic control method for closing interlocking according to claim 5, characterized in that, The detection of the normally open / normally closed contact status of the incoming line switch, bus tie switch, and construction power switch includes: The position status of the circuit breaker and disconnector is detected by the auxiliary contacts of the switch. The auxiliary contacts are used to indicate, control and make logical judgments about the switch status.

7. The automatic control method for closing interlocking according to claim 1, characterized in that, The real-time acquisition of voltage signals from this busbar, adjacent buses, and incoming lines includes: Collect the AB phase voltages of the PTs of this busbar, the AB phase voltages of the PTs of adjacent busbars, and the AB phase voltages of the PTs of the incoming lines to determine the voltage status of each busbar and incoming line.

8. An automatic control device for closing interlocking, characterized in that, The device includes: The acquisition module is used to acquire voltage signals from this busbar, adjacent busbars, and incoming lines in real time. The acquisition module is used to acquire the capacity and load of each bus transformer, and to calculate the rated current and load rate of each bus. The detection module is used to detect the status of normally open / normally closed contacts of incoming line switches, bus tie switches, and construction power switches. The logic generation module is used to generate the closing interlocking logic of the target switch based on the incoming line being energized, the opening and closing status of the associated switch, and the load rate comparison result when the loss of voltage of this bus is detected. The target switch includes the incoming line switch, the bus tie switch, or the construction power switch. The control module is used to connect the contact signal corresponding to the closing interlock logic in series to the closing circuit of the target switch to perform automatic control of the closing interlock of the target switch.

9. An electronic device, characterized in that, The electronic device includes a memory and a processor. The memory stores program code that can run on the processor. When the program code is executed by the processor, it implements the automatic control method for closing interlocking as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores program code that can be called by one or more processors to execute the automatic closing interlocking control method as described in any one of claims 1-7.

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