Modularized intelligent switching method and system for 10kV auxiliary power

Abstract

The invention provides a 10kV station service power modularized intelligent switching method and system, and the method comprises the steps: calling a corresponding operation mode block, a hot standby block and a cold standby block according to the current state and the target state of a target bus, and writing the numbers and states of a power switch, a feeder switch and a PT trolley into corresponding function blocks; state conversion operation between the function blocks is executed in sequence according to a preset conversion path, the operation mode block and the hot standby block are executed from bottom to top, and a simultaneous execution strategy is adopted between the hot standby block and the cold standby block; after each function block conversion operation is completed, whether the bus is successfully converted to the target state or not is judged in real time, if the target state is not achieved, the current operation process is terminated, manual intervention is prompted, and switching operation continues to be executed until the target state condition is met. According to the technical scheme provided by the invention, one-key conversion among various states of the 10kV auxiliary power bus is realized, and the operation efficiency and safety are improved.

Description

Technical Field

[0001] This application relates to the field of switching control technology, and in particular to a modular intelligent switching method and system for 10kV plant power supply. Background Technology

[0002] In the field of power system automation control, the 10kV auxiliary power system, as an important component of the core power supply structure of power plants, is widely used in the supply of power to the plant's load and the adjustment of operating modes. With the development of smart grids and digital power plants, the switching operations of auxiliary power systems are gradually evolving from the traditional manual operation ticket mode to intelligent and automated operation. In existing technologies, based on the communication integration of protection and control devices and monitoring systems, one-click adjustment of auxiliary power operation modes has been achieved, covering the entire process from signal acquisition and status judgment to remote control execution, including key aspects such as power switch switching, feeder control, and bus PT trolley position adjustment. However, existing one-click intelligent switching systems for auxiliary power typically only focus on switching operating modes. Specifically, related technologies can only adjust the auxiliary power operation mode and cannot achieve automatic switching between the three states of the bus: "operating," "hot standby," and "cold standby," making it difficult to meet the deep automation requirements of high-reliability auxiliary power systems. Therefore, there is an urgent need to propose a switching scheme that can achieve automatic switching between the three states of the bus: "operating," "hot standby," and "cold standby." Summary of the Invention

[0003] This application provides a 10kV modular intelligent switching method and system for plant power supply, which at least solves the technical problem that existing technologies cannot achieve automatic switching between the three states of "operation, hot standby, and cold standby" of the busbar, making it difficult to meet the deep requirements of high-reliability plant power supply systems for automated operation.

[0004] The first aspect of this application proposes a modular intelligent switching method for 10kV plant power supply, the method comprising:

[0005] Based on the current status and target status of the target bus, call the corresponding operation mode block, hot standby block and cold standby block, and write the numbers and status of the power switch, feeder switch and PT trolley into the corresponding function blocks;

[0006] The state transition operations between function blocks are executed sequentially according to the preset transition path. The operation mode block and the hot standby block are executed from bottom to top with an interval of 1 second. The hot standby block and the cold standby block are executed simultaneously.

[0007] After each function block conversion operation is completed, it is determined in real time whether the bus has been successfully converted to the target state. If the target state has not been achieved, the current operation process is terminated and manual intervention is prompted until the target state conditions are met and the switching operation is continued.

[0008] The operation mode block includes: a first operation mode block, a second operation mode block, a third operation mode block, and a fourth operation mode block;

[0009] The functional blocks include: operation mode block, hot standby block, and cold standby block.

[0010] Preferably, the step of calling the corresponding operation mode block, hot standby block, and cold standby block according to the current state and target state of the target bus, and writing the numbers and states of the power switch, feeder switch, and PT trolley into the corresponding function blocks includes:

[0011] Based on the number of segments and configuration of the target busbar, dynamically map power switches 1 to 4, feeder switches 1 to 8, and PT trolley elements to the actual electrical equipment;

[0012] The number and order of function blocks to be called are determined based on whether the target state spans the three states of running, hot standby, and cold standby. If it does not span the three states, two function blocks are called; if it does span the three states, three function blocks are called.

[0013] Furthermore, the step of sequentially executing state transition operations between function blocks according to a preset transition path includes:

[0014] The state transition between the operating mode block and the hot standby block is executed sequentially from bottom to top, with a 1-second interval between each operation.

[0015] The state transition between hot standby blocks and cold standby blocks adopts a simultaneous execution strategy.

[0016] Furthermore, the step of determining in real time whether the bus has successfully transitioned to the target state after each function block transition operation includes:

[0017] The bus status is determined in real time by collecting circuit breaker open / close position signals, trolley working / test position signals, PT trolley position signals and bus voltage.

[0018] If the judgment result is that the target state has not been achieved, the current operation process will be terminated, the abnormal state information will be recorded, and the operator will be prompted to intervene manually.

[0019] Furthermore, the method also includes:

[0020] Based on the transition path between the current state and the target state of the bus, the system automatically selects whether to perform a synchronous loop closing operation. If external power switch control is involved, a control strategy of disconnecting first and then closing is adopted.

[0021] The second aspect of this application proposes a 10kV modular intelligent switching system for plant power supply, comprising:

[0022] The function block calling module is used to call the corresponding operation mode block, hot standby block and cold standby block according to the current status and target status of the target bus, and write the number and status of the power switch, feeder switch and PT trolley into the corresponding function block;

[0023] The state transition execution module is used to execute state transition operations between function blocks sequentially according to the preset transition path. The running mode block and the hot standby block are executed in a bottom-up order with an interval of 1 second, while the hot standby block and the cold standby block are executed simultaneously.

[0024] The status judgment and intervention module is used to determine in real time whether the bus has been successfully switched to the target status after each function block switching operation is completed. If the target status is not achieved, the current operation process is terminated and manual intervention is prompted until the target status conditions are met and the switching operation is continued.

[0025] The operation mode block includes: a first operation mode block, a second operation mode block, a third operation mode block, and a fourth operation mode block;

[0026] The functional blocks include: operation mode block, hot standby block, and cold standby block.

[0027] Preferably, the function block calling module is further used for:

[0028] Based on the number of segments and configuration of the target busbar, dynamically map power switches 1 to 4, feeder switches 1 to 8, and PT trolley elements to the actual electrical equipment;

[0029] The number and order of function blocks to be called are determined based on whether the target state spans the three states of running, hot standby, and cold standby. If it does not span the three states, two function blocks are called; if it does span the three states, three function blocks are called.

[0030] Furthermore, the state transition execution module is also used for:

[0031] The state transition between the operating mode block and the hot standby block is executed sequentially from bottom to top, with a 1-second interval between each operation.

[0032] The state transition between hot standby blocks and cold standby blocks adopts a simultaneous execution strategy.

[0033] Furthermore, the status judgment and intervention module is also used for:

[0034] The bus status is determined in real time by collecting circuit breaker open / close position signals, trolley working / test position signals, PT trolley position signals and bus voltage.

[0035] If the judgment result is that the target state has not been achieved, the current operation process will be terminated, the abnormal state information will be recorded, and the operator will be prompted to intervene manually.

[0036] Furthermore, the system also includes:

[0037] The synchronous loop control module is used to automatically select whether to perform synchronous loop operation based on the transition path between the current state and the target state of the bus. If external power switch control is involved, a control strategy of disconnecting first and then closing is adopted.

[0038] The technical solutions provided by the embodiments of this application bring at least the following beneficial effects:

[0039] This application proposes a modular intelligent switching method and system for 10kV plant auxiliary power supply. The method includes: calling the corresponding operation mode block, hot standby block, and cold standby block according to the current state and target state of the target busbar, and writing the numbers and states of the power switch, feeder switch, and PT trolley into the corresponding function blocks; executing the state transition operations between function blocks sequentially according to a preset transition path, wherein the operation mode block and the hot standby block are executed from bottom to top with a 1-second interval, and the hot standby block and the cold standby block are executed simultaneously; after each function block transition operation is completed, it is determined in real time whether the busbar has been successfully switched to the target state. If the target state has not been achieved, the current operation process is terminated and manual intervention is prompted until the target state conditions are met and the switching operation continues; wherein the operation mode block includes: a first operation mode block, a second operation mode block, a third operation mode block, and a fourth operation mode block. The technical solution proposed in this application realizes one-click switching between the states of the 10kV plant auxiliary power supply busbar, improving operational efficiency and safety.

[0040] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0041] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0042] Figure 1 This is a flowchart illustrating a modular intelligent switching method for 10kV power supply systems according to an embodiment of this application.

[0043] Figure 2 This is a schematic diagram illustrating the writing of the numbers and statuses of a power switch, feeder switch, and PT trolley according to an embodiment of this application into an operating mode block;

[0044] Figure 3A schematic diagram showing the writing of the number and status of the power switch, feeder switch and PT trolley according to an embodiment of this application into the hot standby block and the cold standby block;

[0045] Figure 4 This is a schematic diagram of a 10kV plant power supply system according to an embodiment of this application;

[0046] Figure 5 This is a schematic diagram of a function block for writing the number and status of the power switch, feeder switch and PT trolley when switching from operating mode 1 to cold standby according to an embodiment of this application;

[0047] Figure 6 This is a schematic diagram illustrating the execution sequence of switching from operating mode 1 to cold standby according to an embodiment of this application;

[0048] Figure 7 This is a schematic diagram of a function block for writing the numbers and status of the power switch, feeder switch and PT trolley when switches 011 and 017 are not in operation during a switch transition from cold standby to operation mode 1 according to an embodiment of this application.

[0049] Figure 8 This is a schematic diagram illustrating the execution sequence when switches 011 and 017 are not in operation during a transition from cold standby to operating mode 1 according to an embodiment of this application.

[0050] Figure 9 This is a schematic diagram illustrating the execution sequence of two segments transitioning from running mode 1 to running mode 3 according to an embodiment of this application;

[0051] Figure 10 This is a schematic diagram illustrating the execution sequence of two segments transitioning from running mode 1 to running mode 4 according to an embodiment of this application;

[0052] Figure 11 This is a first structural diagram of a 10kV modular intelligent switching system for plant power supply provided according to an embodiment of this application;

[0053] Figure 12 This is a second structural diagram of a 10kV modular intelligent switching system for plant power supply provided according to an embodiment of this application. Detailed Implementation

[0054] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0055] This application proposes a modular intelligent switching method and system for 10kV plant auxiliary power supply. The method includes: calling the corresponding operation mode block, hot standby block, and cold standby block according to the current state and target state of the target busbar, and writing the numbers and states of the power switch, feeder switch, and PT trolley into the corresponding function blocks; executing the state transition operations between function blocks sequentially according to a preset transition path, wherein the operation mode block and the hot standby block are executed from bottom to top with a 1-second interval, and the hot standby block and the cold standby block are executed simultaneously; after each function block transition operation is completed, it is determined in real time whether the busbar has been successfully switched to the target state. If the target state has not been achieved, the current operation process is terminated and manual intervention is prompted until the target state conditions are met and the switching operation continues; wherein the operation mode block includes: a first operation mode block, a second operation mode block, a third operation mode block, and a fourth operation mode block. The technical solution proposed in this application realizes one-click switching between the states of the 10kV plant auxiliary power supply busbar, improving operational efficiency and safety.

[0056] The following description, with reference to the accompanying drawings, describes a 10kV plant power modular intelligent switching method and system according to an embodiment of this application.

[0057] Example 1

[0058] Figure 1 The flowchart below shows a modular intelligent switching method for 10kV power supply according to an embodiment of this application. Figure 1 As shown, the method includes:

[0059] Step 1: Based on the current status and target status of the target bus, call the corresponding operation mode block, hot standby block, and cold standby block, and write the numbers and status of the power switch, feeder switch, and PT trolley into the corresponding function blocks;

[0060] It should be noted that the functional block includes: operation mode block, hot standby block and cold standby block, wherein the operation mode block includes: first operation mode block, second operation mode block, third operation mode block and fourth operation mode block.

[0061] It should be noted that the automatic switching control logic based on the current and target states of the busbar calls the preset function blocks (operation mode block, hot standby block, cold standby block) in the one-click modular intelligent switching operating system, and writes the relevant electrical equipment numbers and their target states into the corresponding function blocks according to the state transition requirements, so as to achieve automatic switching of the busbar state. In some implementations, this step uses a state recognition and function block mapping mechanism, combined with the IEC 61850 and Modbus communication protocol, to achieve precise control of the electric trolley in the KYN28-12 switchgear.

[0062] First, the HNIPS-9621 protection and control device collects relevant remote signaling signals of the busbar, including the circuit breaker open / close position, trolley working / test position, and PT trolley position, to determine the current status of the busbar (operating, hot standby, or cold standby). Then, the host computer calls the corresponding function block based on the user-input target status and writes the numbers of the power switches (e.g., 001, 010), feeder switches (e.g., 011, 012), and PT trolleys (e.g., 1STV) along with the target status (e.g., "open," "closed," "test," "isolation"). Each function block contains 4 power switch elements, 8 feeder switch elements, and 1 PT trolley element, with a one-to-one correspondence between elements to ensure the accuracy and consistency of the operational logic.

[0063] In this embodiment of the disclosure, the step of calling the corresponding operation mode block, hot standby block, and cold standby block according to the current state and target state of the target bus, and writing the numbers and states of the power switch, feeder switch, and PT trolley into the corresponding function blocks, includes:

[0064] Based on the number of segments and configuration of the target busbar, dynamically map power switches 1 to 4, feeder switches 1 to 8, and PT trolley elements to the actual electrical equipment;

[0065] The number and order of function blocks to be called are determined based on whether the target state spans the three states of running, hot standby, and cold standby. If it does not span the three states, two function blocks are called; if it does span the three states, three function blocks are called.

[0066] It should be noted that this is based on the dynamic identification of the 10kV plant power busbar structure and the intelligent matching of power switch status. In some implementations, the system automatically identifies and establishes a mapping relationship between the power switches and "Power Switch 1" to "Power Switch 4" in the function block by reading the number of busbar segments (e.g., segment 1, segment 2, segment 3, segment 4) and their corresponding operating mode configurations (e.g., operating mode 1, operating mode 2, etc.), thereby providing accurate equipment control basis for subsequent switching operations.

[0067] This step involves several key parameters, including bus segment numbers (1-4), power switch numbers (e.g., 001, 002, 005, 006, etc.), operating mode types (operating, hot standby, cold standby), and mapping rules for power switch elements in the function block. For example, for bus segment 1, power switch 1 is mapped to 001, power switch 2 is mapped to 010, while power switches 3 and 4 are NULL; for bus segment 2, power switch 1 is 002, power switch 2 is 010, power switch 3 is 020, and power switch 4 is 005. This mapping relationship must comply with the specifications for device naming and status identification in the IEC 61850 standard to ensure the consistency and scalability of the communication protocol.

[0068] When busbar status changes (e.g., operating → hot standby → cold standby) or operating mode changes (e.g., operating mode 1 → operating mode 3), the system needs to dynamically adjust the mapping relationship of power switches according to the current number of busbar segments and the target status to ensure the correct issuance and execution of operation commands. For example, when executing the operation of "switching busbar segment 1 from operating mode 1 to cold standby", the system will automatically identify power switch 1 corresponding to busbar segment 1 as 001 and power switch 2 as 010, and map them to the corresponding positions in the function block, providing the equipment basis for subsequent circuit breaker tripping, trolley dispatching, and other operations.

[0069] For example, such as Figure 2 and 3 The diagram shows the number and status of the power switch, feeder switch, and PT trolley written into the corresponding function blocks. In the diagram, Operation Mode 1 is the first operation mode block, Operation Mode 2 is the second operation mode block, Operation Mode 3 is the third operation mode block, and Operation Mode 4 is the fourth operation mode block.

[0070] like Figure 4 The diagram shown is a schematic of a 10kV plant power system.

[0071] It should be noted that in the functional blocks of the diagram, power switch 1 refers to the power supply switch on the low-voltage side of the high-voltage transformer corresponding to the busbar; power switch 2 refers to the tie switch with a backup priority of 1 for the busbar; power switch 3 refers to the tie switch 020 for sections 2 and 3; and power switch 4 refers to the external power supply for sections 2 and 3, namely 005 and 006. Sections 1 and 4 only have power switches 1 and 2, as shown in Table 1.

[0072] Table 1

[0073]

[0074]

[0075] There are 4 types of operation modes for 1-segment and 4-segment, and 6 types of operation modes for 2-segment and 3-segment, as shown in Tables 2-5.

[0076] Table 2: 10kV Section 1 Operation Mode Table

[0077]

[0078] Table 3: 10kV Two-Section Operation Mode Table (10kV can only have two sections interconnected)

[0079]

[0080] Table 4: 10kV 3-stage operation mode table

[0081]

[0082]

[0083] Table 5: 10kV 4-Segment Operation Mode Table

[0084]

[0085] Step 2: Execute the state transition operations between function blocks sequentially according to the preset transition path. The operation mode block and the hot standby block are executed from bottom to top with an interval of 1 second. The hot standby block and the cold standby block are executed simultaneously.

[0086] In this embodiment of the disclosure, the step of sequentially executing the state transition operations between function blocks according to a preset transition path includes:

[0087] The state transition between the operating mode block and the hot standby block is executed sequentially from bottom to top, with a 1-second interval between each operation, to ensure stable equipment status.

[0088] The state transition between hot and cold standby blocks employs a simultaneous execution strategy to accelerate operational efficiency and reduce busbar exposure time.

[0089] It should be noted that the operation interval is set to 1 second to avoid mechanical wear and system instability caused by frequent operation of electrical equipment. Simultaneously, a status confirmation mechanism is used for status assessment. After each operation, the system confirms whether the equipment status meets expectations via remote signaling. If not, the process terminates and prompts for manual intervention to ensure operational safety.

[0090] The system executes state switching operations between functional blocks sequentially according to a preset transition path. Specifically, when the busbar state transitions from "Operating Mode Block" to "Hot Standby Block," the system adopts a bottom-up sequential execution strategy. That is, following the order of elements in the functional blocks, it starts with the feeder switch at the bottom and executes operations such as circuit breaker tripping and trolley disconnection sequentially upwards. A one-second time interval is set between each operation to ensure the stability and safety of equipment state switching. This strategy complies with the timing requirements for sequence control and state confirmation in IEC 60870-5-101 / 104 and IEC 61850 standards, avoiding equipment malfunctions or system instability due to excessively rapid operations.

[0091] During the transition from a "hot standby block" to a "cold standby block," the system employs a simultaneous execution strategy, performing synchronous operations on all relevant circuit breakers and trolleys without waiting for each one individually, thus significantly reducing operation time. This strategy is suitable for scenarios where the busbar is already in hot standby mode and only requires all equipment to be taken out of operation and placed in an isolated state. During this process, the system communicates with the plant power LCU via Modbus RTU or TCP protocol, issuing control commands such as trolley tripping and circuit breaker opening, and collecting remote signaling feedback in real time to ensure closed-loop control of the operation.

[0092] Step 3: After each function block conversion operation is completed, determine in real time whether the bus has been successfully converted to the target state. If the target state has not been achieved, terminate the current operation process and prompt manual intervention until the target state conditions are met and then continue to execute the switching operation.

[0093] In this embodiment of the disclosure, the step of determining in real time whether the bus has been successfully switched to the target state after each function block conversion operation is completed includes:

[0094] The bus status is determined in real time by collecting circuit breaker open / close position signals, trolley working / test position signals, PT trolley position signals and bus voltage.

[0095] If the judgment result is that the target state has not been achieved, the current operation process will be terminated, the abnormal state information will be recorded, and the operator will be prompted to intervene manually.

[0096] Specifically, after each function block transition operation is completed, the system needs to determine in real time whether the bus has successfully transitioned to the target state. This step is technically implemented based on a status feedback mechanism and logical judgment algorithm, combined with the data acquisition and processing capabilities of the IEC 61850 standard communication protocol and the Modbus protocol, ensuring accurate identification of the bus status and reliable control of the operation process.

[0097] The system collects and analyzes remote signaling signals from protection and control devices (such as HNIPS-9621) via a monitoring host computer, including key status parameters such as circuit breaker open / close position, trolley working / test position, and bus PT trolley position. After completing a function block transition (e.g., operating mode 1 → hot standby), the system immediately initiates a status verification process, comparing the currently collected bus status with the target status item by item using preset status matching logic. For example, if the target status is "hot standby," the system needs to confirm that power switch 1 is in the open position, power switch 2 is in the closed position, the PT trolley is in the closed position, and all feeder switches are in the open position or any other position (depending on the configuration).

[0098] The response time for status determination should be controlled within 500ms to meet real-time requirements; the acquisition frequency of remote signaling signals should be set to 100ms / time to ensure timely capture of status changes. Furthermore, the system should be configured with status matching tolerance thresholds, such as requiring the circuit breaker position signal to stabilize within 1 second to avoid misjudgments due to signal jitter.

[0099] During execution, if the bus status does not meet the target conditions (such as a feeder switch not tripping or the PT trolley not engaging), the system will immediately terminate the current operation process and display a prompt message on the human-machine interface (HMI), requiring the operator to intervene manually until the status is met before continuing to execute subsequent steps, thereby ensuring the safety and accuracy of the operation.

[0100] In this embodiment of the disclosure, the method further includes:

[0101] Based on the transition path between the current state and the target state of the bus, the system automatically selects whether to perform a synchronous loop closing operation. If external power switch control is involved, a control strategy of disconnecting first and then closing is adopted.

[0102] It should be noted that a busbar state model is constructed in the host computer by collecting remote signaling signals (such as open / close position, working / test position, etc.) from relevant circuit breakers, PT trolleys, and feeder switches on the busbar. When the user selects a target state in the monitoring system (such as switching from "Running" to "Hot Standby" or "Cold Standby"), the system compares the current state with the target state and automatically identifies whether the switching path involves tie switches, i.e., external power switches (such as 020, 005, 006, etc.). If the switching path includes tie switches, the system will determine whether a synchronous loop closing operation needs to be performed to ensure that the voltage phase of the busbar is consistent during the switching process and to avoid closing impact.

[0103] For example, segment 1 is switched from operating mode 1 to cold standby:

[0104] After the host computer completes the instruction selection, the monitoring system sequentially calls three function blocks: Operating Mode 1, Hot Standby, and Cold Standby (if the instruction does not cross states, two function blocks are called), and writes the relevant switch number and status into the function block, such as... Figure 5 As shown.

[0105] During the transition from Operation Mode 1 to Hot Standby, the execution sequence is from bottom to top, with a 1-second interval. If a switch fails to trip during execution, execution continues uninterrupted. After execution, the busbar status is checked. If the busbar is not switched to Hot Standby, the host computer terminates execution, requiring manual intervention until the Hot Standby status is met. Then, the operator issues the "10kV..." command on the host computer. 1 section Depend on Hot standby change Cold standby"The command is sufficient; if it is determined that the bus has switched to hot standby, the host computer will continue to execute the process from hot standby to cold standby, and the execution order is simultaneous, such as..." Figure 6 As shown.

[0106] For example, when segment 1 switches from cold standby to operating mode 1, switches 011 and 017 do not operate:

[0107] After the command selection is completed, the monitoring system sequentially calls three function blocks: cold standby, hot standby, and operating mode 1 (if the command does not cross states, two function blocks are called), and writes the relevant switch number and status into the function block, such as... Figure 7 As shown.

[0108] Once the operating conditions are met and the "OK" button is clicked, the process proceeds from left to right: first, cold standby is switched to hot standby, and then hot standby is switched to operating mode 1.

[0109] During the transition from cold standby to hot standby, the execution sequence is simultaneous. After execution, the busbar status is assessed. If the busbar is not switched to hot standby, the host computer terminates the execution, requiring manual intervention until the busbar is in hot standby condition. Then, the operator issues the command "10kV Section 1, switch from hot standby to operating mode 1, do not operate any switches" on the host computer. If the busbar is switched to hot standby, the host computer continues the transition from hot standby to operating mode 1, executing sequentially from top to bottom with a 1-second interval. If a switch fails to close during execution, the process continues uninterrupted until manual intervention is finally initiated. Figure 8 As shown.

[0110] For example, two segments switch from running mode 1 to running mode 3:

[0111] Execution process: First, simultaneously close switch 020. After confirming that switch 020 is indeed closed, then open switch 002. Figure 9 As shown.

[0112] For example, two segments switch from running mode 1 to running mode 4:

[0113] Execution process: First, disconnect switch 002. After confirming that switch 002 has indeed tripped, close switch 005. Figure 10 As shown.

[0114] In summary, the modular intelligent switching method for 10kV plant power proposed in this embodiment effectively avoids the problems of closing failure or equipment damage caused by inconsistent status of tie switches under the traditional operation ticket mode through intelligent judgment and automatic control, thereby improving the reliability and automation level of switching operations.

[0115] Example 2

[0116] Figure 11This is a structural diagram of a 10kV modular intelligent switching system for plant power supply according to an embodiment of this application, as shown below. Figure 11 As shown, the system includes:

[0117] The function block calling module 100 is used to call the corresponding operation mode block, hot standby block and cold standby block according to the current status and target status of the target bus, and write the number and status of the power switch, feeder switch and PT trolley into the corresponding function block;

[0118] The state transition execution module 200 is used to execute state transition operations between function blocks sequentially according to a preset transition path. The running mode block and the hot standby block are executed in a bottom-up order with an interval of 1 second, while the hot standby block and the cold standby block are executed simultaneously.

[0119] The status judgment and intervention module 300 is used to judge in real time whether the bus has been successfully switched to the target state after each function block switching operation is completed. If the target state is not achieved, the current operation process is terminated and manual intervention is prompted until the target state conditions are met and the switching operation is continued.

[0120] The operation mode block includes: a first operation mode block, a second operation mode block, a third operation mode block, and a fourth operation mode block;

[0121] The functional blocks include: operation mode block, hot standby block, and cold standby block.

[0122] In this embodiment of the disclosure, the function block calling module 100 is further configured to:

[0123] Based on the number of segments and configuration of the target busbar, dynamically map power switches 1 to 4, feeder switches 1 to 8, and PT trolley elements to the actual electrical equipment;

[0124] The number and order of function blocks to be called are determined based on whether the target state spans the three states of running, hot standby, and cold standby. If it does not span the three states, two function blocks are called; if it does span the three states, three function blocks are called.

[0125] In this embodiment of the disclosure, the state transition execution module 200 is further configured to:

[0126] The state transition between the operating mode block and the hot standby block is executed sequentially from bottom to top, with a 1-second interval between each operation.

[0127] The state transition between hot standby blocks and cold standby blocks adopts a simultaneous execution strategy.

[0128] In this embodiment of the disclosure, the state judgment and intervention module 300 is further used for:

[0129] The bus status is determined in real time by collecting circuit breaker open / close position signals, trolley working / test position signals, PT trolley position signals and bus voltage.

[0130] If the judgment result is that the target state has not been achieved, the current operation process will be terminated, the abnormal state information will be recorded, and the operator will be prompted to intervene manually.

[0131] In the embodiments disclosed herein, such as Figure 12 As shown, the system also includes:

[0132] The synchronous loop control module 400 is used to automatically select whether to perform synchronous loop operation based on the transition path between the current state and the target state of the bus. If external power switch control is involved, a control strategy of disconnecting first and then closing is adopted.

[0133] In summary, the 10kV modular intelligent switching system for plant power proposed in this embodiment effectively avoids the problems of closing failure or equipment damage caused by inconsistent status of the tie switch under the traditional operation ticket mode through intelligent judgment and automatic control, thereby improving the reliability and automation level of switching operations.

[0134] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0135] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0136] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A modular intelligent switching method for 10kV plant power supply, characterized in that, include: Based on the current status and target status of the target bus, call the corresponding operation mode block, hot standby block and cold standby block, and write the numbers and status of the power switch, feeder switch and PT trolley into the corresponding function blocks; The state transition operations between function blocks are executed sequentially according to the preset transition path. The operation mode block and the hot standby block are executed in a bottom-up order, while the hot standby block and the cold standby block are executed simultaneously. After each function block conversion operation is completed, it is determined in real time whether the bus has been successfully converted to the target state. If the target state has not been achieved, the current operation process is terminated and manual intervention is prompted until the target state conditions are met and the switching operation is continued. The operation mode block includes: a first operation mode block, a second operation mode block, a third operation mode block, and a fourth operation mode block; The functional blocks include: operation mode block, hot standby block, and cold standby block.

2. The method as described in claim 1, characterized in that, The process involves calling the corresponding operation mode block, hot standby block, and cold standby block based on the current and target bus status, and writing the numbers and statuses of the power switch, feeder switch, and PT trolley into the corresponding function blocks, including: Based on the number of segments and configuration of the target busbar, dynamically map power switches 1 to 4, feeder switches 1 to 8, and PT trolley elements to the actual electrical equipment; The number and order of function blocks to be called are determined based on whether the target state spans the three states of running, hot standby, and cold standby. If it does not span the three states, two function blocks are called; if it does span the three states, three function blocks are called.

3. The method as described in claim 2, characterized in that, The step of sequentially executing state transition operations between function blocks according to a preset transition path includes: The state transition between the operating mode block and the hot standby block is executed sequentially from bottom to top, with a 1-second interval between each operation. The state transition between hot standby blocks and cold standby blocks adopts a simultaneous execution strategy.

4. The method as described in claim 3, characterized in that, The step of determining in real time whether the bus has been successfully switched to the target state after each function block conversion operation is completed includes: The bus status is determined in real time by collecting circuit breaker open / close position signals, trolley working / test position signals, PT trolley position signals and bus voltage. If the judgment result is that the target state has not been achieved, the current operation process will be terminated, the abnormal state information will be recorded, and the operator will be prompted to intervene manually.

5. The method as described in claim 4, characterized in that, The method further includes: Based on the transition path between the current state and the target state of the bus, the system automatically selects whether to perform a synchronous loop closing operation. If external power switch control is involved, a control strategy of disconnecting first and then closing is adopted.

6. A 10kV modular intelligent switching system for plant power supply, characterized in that, include: The function block calling module is used to call the corresponding operation mode block, hot standby block and cold standby block according to the current status and target status of the target bus, and write the number and status of the power switch, feeder switch and PT trolley into the corresponding function block; The state transition execution module is used to execute state transition operations between function blocks sequentially according to the preset transition path. The running mode block and the hot standby block are executed in a bottom-up order with an interval of 1 second, while the hot standby block and the cold standby block are executed simultaneously. The status judgment and intervention module is used to determine in real time whether the bus has been successfully switched to the target status after each function block switching operation is completed. If the target status is not achieved, the current operation process is terminated and manual intervention is prompted until the target status conditions are met and the switching operation is continued. The operation mode block includes: a first operation mode block, a second operation mode block, a third operation mode block, and a fourth operation mode block; The functional blocks include: operation mode block, hot standby block, and cold standby block.

7. The system as described in claim 6, characterized in that, The function block calling module is also used for: Based on the number of segments and configuration of the target busbar, dynamically map power switches 1 to 4, feeder switches 1 to 8, and PT trolley elements to the actual electrical equipment; The number and order of function blocks to be called are determined based on whether the target state spans the three states of running, hot standby, and cold standby. If it does not span the three states, two function blocks are called; if it does span the three states, three function blocks are called.

8. The system as described in claim 7, characterized in that, The state transition execution module is also used for: The state transition between the operating mode block and the hot standby block is executed sequentially from bottom to top, with a 1-second interval between each operation. The state transition between hot standby blocks and cold standby blocks adopts a simultaneous execution strategy.

9. The system as described in claim 8, characterized in that, The status judgment and intervention module is also used for: The bus status is determined in real time by collecting circuit breaker open / close position signals, trolley working / test position signals, PT trolley position signals and bus voltage. If the judgment result is that the target state has not been achieved, the current operation process will be terminated, the abnormal state information will be recorded, and the operator will be prompted to intervene manually.

10. The system as described in claim 9, characterized in that, The system also includes: The synchronous loop control module is used to automatically select whether to perform synchronous loop operation based on the transition path between the current state and the target state of the bus. If external power switch control is involved, a control strategy of disconnecting first and then closing is adopted.

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