A simulation analysis system and method for consequences of light-weight nuclear power unit after power loss
By constructing a simulation analysis system for the consequences of power failure in lightweight nuclear power units, the problems of complex simulation and lack of decision support in existing technologies have been solved, and extensive and detailed simulation and decision support for power failure faults in nuclear power units have been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CNNC FUJIAN FUQING NUCLEAR POWER
- Filing Date
- 2024-12-10
- Publication Date
- 2026-06-09
AI Technical Summary
Existing technologies for simulating power outage accidents in nuclear power units are too complex, can only simulate some electrical systems, and lack auxiliary decision-making functions, resulting in unclear accident handling.
A simulation analysis system for the consequences of power failure in a lightweight nuclear power unit was designed, comprising an electrical node module, a logic judgment module, and a simulation analysis module. By constructing an electrical node model and making logical judgments, the system simulates the consequences of power failure at the electrical node and provides auxiliary decision-making information.
It enables extensive and detailed simulation of power outage faults in nuclear power units, improving simulation efficiency and system flexibility, and automatically provides auxiliary decision-making information on the consequences of power outages, helping users to quickly handle power outage accidents.
Smart Images
Figure CN119918389B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of logic simulation and decision support for nuclear power units, and in particular to a lightweight simulation analysis system and method for the consequences of power failure in nuclear power units. Background Technology
[0002] Nuclear power unit power supply systems are exceptionally complex, with numerous electrical load devices of different types and levels. In particular, the instrumentation and control system, as the control center of the nuclear power plant, plays a crucial role in the operation, control, and protection of the nuclear power unit. Events such as the loss of power to the 48V and 110V instrumentation and control systems, and the loss of power to the 220V protection system, often lead to significant changes in the unit's operating status. If the scope of the impact of a power outage is not clearly defined, or if the risk analysis of the event is insufficient, it may affect accident handling and even lead to an unintended unit shutdown.
[0003] In existing technologies, training and drills for nuclear power unit power outage scenarios are primarily conducted using simulators. Simulators rely on robust simulation models to largely replicate the physical processes of key systems and subsystems of a nuclear power unit, including thermal-hydraulic systems, electrical systems, control systems, and safety systems. However, simulators have limitations such as high computational resource consumption, relatively low efficiency, and the ability to be deployed locally and accessed only by a single machine. For power outages, simulators only simulate power loss in electrical systems or equipment at 380V and above, and do not analyze the consequences or provide textual prompts for decision support. Summary of the Invention
[0004] This invention provides a lightweight simulation analysis system and method for the consequences of power failure in nuclear power units, which addresses the problems of existing technologies where simulations of power failure accidents in nuclear power units are too complex, can only simulate some electrical systems, and lack result analysis and decision support functions.
[0005] The technical solution of the present invention is as follows:
[0006] This invention proposes a simulation analysis system for the consequences of power failure in lightweight nuclear power units. The system includes an electrical node module, a logic judgment module, and a simulation analysis module. The electrical node module constructs an electrical node model based on electrical components and their connections in the primary electrical system, and defines the attributes and energized logical relationships of the electrical nodes. The logic judgment module performs logical judgments based on the energized logical relationships of the electrical nodes to determine their state. When the simulation analysis module receives a power failure signal from an electrical node, it queries the downstream electrical nodes of the failed electrical node and transmits the power failure signal to the downstream electrical nodes. The logic judgment module then performs logical judgments on the failed electrical node and the downstream electrical nodes, and provides the power failure status of the downstream electrical nodes based on the judgment results.
[0007] In some embodiments, an electrical node includes a busbar, a switch, and equipment loads, and the attribute definition of the electrical node includes: basic information, physical connection relationships, and power failure handling decision information.
[0008] In some embodiments, the energized logic relationship definition of the switch includes two types of logic signals: opening and closing. The opening logic signal includes: manual opening signal or slow-cut device opening signal; low voltage protection signal; whether to define the opening logic signal when the switch loses its own control power, depending on the switch type; receiving an automatic switching or trip protection signal from the equipment load powered by the switch. The closing logic signal of the switch includes: manual closing or slow-cut device closing; automatic switching or other start signals from the equipment load powered by the switch.
[0009] In some embodiments, the definition of the energized logic relationship of the busbar includes two logic signals: energized and de-energized. The energized logic signal of the busbar is defined as follows: if any busbar supplying power to the busbar is energized and the switch on the energized busbar is in the closed state, then the busbar is energized; otherwise, the busbar is defined as a de-energized logic signal. The definition of the energized logic relationship of the equipment load includes two logic signals: energized and de-energized. The energized logic signal of the equipment load is defined as follows: if the busbar supplying power to the equipment load is energized and the switch on the energized busbar is closed, then the equipment load is energized; otherwise, the equipment load is de-energized.
[0010] In some embodiments, the electrical node module stores the attribute definitions and live logic relationship definitions of electrical nodes in a Redis database.
[0011] In some embodiments, the power failure signal received by the simulation analysis module specifically refers to the opening or closing of the switch; after receiving the power failure signal, the simulation analysis module queries the data of all electrical nodes downstream of the switch and transmits the power failure signal to all downstream electrical nodes; the simulation analysis module performs logical judgment on the power failure electrical node and downstream electrical nodes through the logic judgment module, specifically including: the simulation analysis module determines whether the switch that issued the power failure signal has set delay logic, determines the status of the switch's interlocking switch, and determines the status of the electrical nodes of the downstream switch, busbar, and equipment load.
[0012] In some embodiments, the electrical node module receives the logical judgment results of the simulation analysis module on the power-out electrical node and downstream electrical node, and uses different colors to indicate the equipment load affected by the power outage signal; the simulation analysis module feeds back the power outage fault handling decision information and basic information of the equipment load affected by the power outage signal to the user.
[0013] In some embodiments, the simulation analysis module further includes a knowledge and experience module, which classifies the equipment loads by importance and automatically sorts the equipment loads affected by the power failure signal according to the importance classification, and provides feedback to the user.
[0014] This invention proposes a simulation analysis method for the consequences of power failure in lightweight nuclear power units, the method comprising:
[0015] Step 1: Build an electrical node model of busbars, switches, and equipment loads;
[0016] Step 1.1: The electrical node module constructs an electrical node model based on the electrical components and their connection relationships in the primary electrical system;
[0017] Step 1.2: Define the attributes and live logic relationships for the electrical nodes;
[0018] Step 2: Conduct a simulation of the consequences of power failure.
[0019] Step 2.1: The simulation analysis module uses the opening or closing of the switch as the power loss signal, queries the data of all electrical nodes downstream of the switch, and transmits the power loss signal to all downstream electrical nodes;
[0020] Step 2.2: The simulation analysis module performs logical judgments on the power-out electrical node and the downstream electrical node through the logic judgment module;
[0021] Step 3: Conduct a power outage consequence analysis;
[0022] Step 3.1: Based on the logical judgment results of the simulation analysis module, the electrical node module uses different colors to indicate the equipment load affected by the power failure signal;
[0023] Step 3.2: The simulation analysis module will feed back the attribute definition information of the equipment load affected by the switch power failure signal to the user;
[0024] Step 3.3: The knowledge and experience module of the simulation analysis module sorts the equipment load affected by the power failure signal according to the importance level and provides feedback to the user.
[0025] In some embodiments, the attribute definition of the electrical node in step 1.2 includes: basic information, physical connection relationship, and power failure handling decision information; the energized logic relationship definition of the electrical node includes: switch closing and opening logic signals; bus energizing and de-energizing logic signals; equipment load energizing and de-energizing logic signals; the attribute definition and energized logic relationship definition data of the electrical node are stored in the Redis database.
[0026] In some embodiments, the process of querying the data of all electrical nodes downstream of the switch in step 2.1 is as follows: a depth-first search algorithm is used to traverse the electrical nodes downstream of the switch in turn, and the traversed downstream electrical node data is converted into JSON format and stored in a Redis database; then, the downstream electrical node JSON data is read from the Redis database and converted into electrical node data.
[0027] In some embodiments, the simulation analysis module in step 2.2 performs logical judgments on the power-out electrical node and the downstream electrical node through the logic judgment module, specifically including:
[0028] Step 2.2.1: The simulation analysis module reads the energized logic relationship definition of the switch that issued the power failure signal from the Redis database;
[0029] Step 2.2.2: The simulation analysis module uses the logic judgment module to determine whether the switch meets the opening or closing conditions, whether a delay logic is set, whether the switch has returned to its original state, and stores the switch state in the Redis database;
[0030] Step 2.2.3: If the switch does not return to its original state, the simulation analysis module queries the Redis database to see if the switch has any interlocking switches and determines the status of the interlocking switches.
[0031] Step 2.2.4: The simulation analysis module uses the logic judgment module to determine the status of the electrical nodes of downstream switches, buses and equipment loads.
[0032] In some embodiments, determining the status of the interlocking switch in step 2.2.3 specifically includes: determining whether the interlocking switch meets the opening or closing conditions and whether delay logic is set through the logic judgment module, determining the status of the interlocking switch, and storing the status of the interlocking switch in the Redis database.
[0033] In some embodiments, the simulation analysis module in step 2.2.4 determines the status of electrical nodes of downstream switches, buses, and equipment loads through the logic judgment module. Specifically, this includes: for downstream switches, determining whether the downstream switches meet the opening or closing conditions and whether delay logic is set, thus determining the downstream switch status and storing it in the Redis database; for downstream buses, querying the upstream incoming line relationship of the downstream buses through the Redis database, determining whether the downstream buses are energized through the logic judgment module, and storing the downstream bus status in the Redis database; for downstream equipment loads, querying the upstream incoming line relationship of the downstream equipment loads by upward scanning, determining whether the downstream equipment loads are energized through the logic judgment module, and storing the downstream equipment load status in the Redis database.
[0034] The following benefits can be obtained by implementing this invention.
[0035] 1. This invention proposes a lightweight simulation analysis system and method for the consequences of power failure in nuclear power units. The system builds a simplified electrical node model based on the decision data information required by users in the event of a power failure in the unit. It performs simulation analysis on the power failure of the nuclear power plant through a simulation analysis module. Authorized users can perform simulation operations via the Internet, which improves the flexibility and efficiency of the simulation system.
[0036] 2. This invention proposes a simulation analysis system and method for lightweight power failure consequences in nuclear power units. This invention has a wider range of simulations for power failure scenarios in nuclear power units and more detailed simulations of power failure scenarios. After a power failure simulation operation is performed, the system's knowledge and experience module automatically summarizes and pushes the loads affected by the power failure to the user in a list format according to the processing priority. The simulation analysis module automatically provides auxiliary decision-making information such as power failure analysis, intervention measures, and intervention procedures, truly achieving the effect of auxiliary decision-making for power failures. Attached Figure Description
[0037] Figure 1 This is a flowchart of the downstream electrical node of the query switch in a simulation analysis system for the consequences of power failure in a lightweight nuclear power unit, as proposed in an embodiment of the present invention.
[0038] Figure 2 This is a flowchart of the switching logic judgment of a simulation analysis system for the consequences of power failure in a lightweight nuclear power unit, as proposed in an embodiment of the present invention.
[0039] Figure 3 This is a flowchart of the downstream electrical node logic judgment of a simulation analysis system for the consequences of power failure in a lightweight nuclear power unit, as proposed in an embodiment of the present invention.
[0040] Figure 4 This is a flowchart illustrating the subsequent logic judgment of the downstream electrical nodes in a simulation analysis system for the consequences of power failure in a lightweight nuclear power unit, as proposed in an embodiment of the present invention.
[0041] Figure 5 This is a flowchart illustrating the electrical node definition of a simulation analysis system for the consequences of power failure in a lightweight nuclear power unit, as proposed in an embodiment of the present invention. Detailed Implementation
[0042] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0043] like Figures 1 to 5As shown, this invention proposes a simulation analysis system for the consequences of power failure in lightweight nuclear power units. The system includes an electrical node module, a logic judgment module, and a simulation analysis module. The electrical node module constructs an electrical node model based on electrical components and their connections in the primary electrical system, and defines the attributes and energized logical relationships of the electrical nodes. The attribute and energized logical relationship definitions are stored in a Redis database. The logic judgment module performs logical judgments based on the energized logical relationships of the electrical nodes to determine their status (whether the switch is closed or open, and whether the busbar and equipment load are de-energized). When the simulation analysis module receives a power failure signal from an electrical node, it queries the downstream electrical nodes of the de-energized electrical node and transmits the power failure signal to the downstream electrical nodes. The logic judgment module then performs logical judgments on the de-energized electrical node and the downstream electrical nodes, and provides the power failure status of the de-energized electrical node and the downstream electrical nodes based on the judgment results.
[0044] The electrical node module includes electrical nodes and their connection relationships. Electrical nodes include busbars, switches, and equipment loads. The electrical node module constructs a two-dimensional planar diagram based on the distribution of electrical components (including busbars, circuit breakers, contactors, and equipment loads) in the primary electrical system. It decomposes all electrical components in the primary electrical system into independent electrical nodes (circuit breakers and contactors are set as switch electrical nodes). The module constructs the connection relationships of electrical nodes based on the distribution relationship of each electrical component in the primary electrical system, ensuring that the electrical node module can realistically simulate the electrical components and their logical relationships in the primary electrical system.
[0045] The attribute definition of electrical nodes includes basic information, physical connection relationships, and power outage fault handling decision information. Basic information includes node code, node name, and node location. Physical connection relationships include connections to power sources, outgoing electrical nodes, and control power sources. Power outage fault handling decision information includes the power outage accident procedures, power outage experience feedback, drawing information, power outage fault procedures, and power outage cause analysis for the electrical node. The definition of the live logic relationships of electrical nodes includes instrumentation and control logic, interlocking logic, manual control, and relay protection related content. Specifically, the definition of the live logic relationships of switches includes two types of logic signals: opening and closing. When a switch receives a defined opening logic signal, the logic judgment module determines that the switch's electrical component is open; when a switch receives a defined closing logic signal, the logic judgment module determines that the switch's electrical component is closed. The tripping logic signals include: 1. Manual tripping signal or slow-cut device tripping signal; 2. Undervoltage protection signal (e.g., when the bus voltage is below 70%, the electrical node of the downstream motor incoming switch trips); 3. When the switch loses its control power, whether to define a tripping logic signal depends on the switch type (e.g., an electrical self-holding contactor automatically trips when control power is lost, while a mechanical self-holding contactor or circuit breaker remains in place when control power is lost); 4. Receiving an automatic switching or tripping protection signal from the electrical node of the equipment load supplied by the switch. The closing logic signals include: 1. Manual closing (without a blocking signal from other control switches) or slow-cut device closing; 2. Automatic switching or other start signals from the electrical node of the equipment load supplied by the switch. Table 1 shows an example of the switch energized logic relationship definition, where numbers ending in TB represent busbars and numbers ending in JA represent switches.
[0046] Table 1 Definition of Switch Energized Logic Relationships
[0047]
[0048] The definition of the energization logic for bus electrical nodes includes two types of logic signals: energized and de-energized. The energized logic signal for a bus is defined as follows: if any bus electrical node supplying power to the bus is energized and the switch on that bus is closed, then the bus is energized; otherwise, the bus is de-energized. Taking bus number 1LGC001TB as an example, 1LGC001TB has two power supplies. As long as one is available (i.e., either power supply is present), 1LGC001TB will not lose voltage. The first power supply is available: 1LGD001TB is energized and 1LGC001JA is closed; the second power supply is available: 9LGR002TB is energized and 1LGC102JA is closed. If either power supply is satisfied, bus 1LGC001TB is energized; otherwise, 1LGC001TB is de-energized. Table 2 lists some examples of energization logic for buses; cases that do not conform to the energization logic indicate that the bus is de-energized.
[0049] Table 2 Definition of Busbar Live Logic Relationships
[0050]
[0051] The definition of the energization logic relationship of the electrical nodes of the equipment load includes two types of logic signals: energized and de-energized. The energized logic signal of the equipment load is defined as follows: if the bus supplying power to the equipment load is energized and the switch on the bus is closed, then the equipment load is energized; otherwise, the equipment load is de-energized.
[0052] After receiving a power failure signal from an upstream electrical node, the logic judgment module determines the state of the electrical node (switch open or closed, busbar and equipment load electrical nodes de-energized or energized) based on the definition of the electrical node's energized logic relationship.
[0053] The simulation analysis module performs power outage fault simulation analysis using simulation algorithm models. For example, it can simulate the tripping condition of an electrical switch. When a corresponding switch is selected and placed in the open state, the simulation analysis module begins to analyze the consequences of power outage. At the start of the simulation, a switch electrical node is opened or closed, causing the switch to lose power, to simulate a power outage fault in the primary electrical system. The simulation analysis module queries all electrical nodes downstream of the switch that issued the power outage signal (referred to as the power-out switch). If the power-out switch is a control switch, it queries the downstream node data of each controlled switch electrical node in turn. When querying the downstream electrical nodes of the switch electrical node, a Depth-First Search (DFS) algorithm is used to traverse the downstream electrical nodes of the switch in turn. The results of the DFS traversal are preprocessed, and the data is converted into JSON format and stored in a Redis database. Then, the corresponding JSON data is read from the Redis database, converted into electrical node data objects, and the power outage signal of the switch is transmitted to the downstream electrical nodes.
[0054] Meanwhile, the simulation analysis module performs logical judgments on the power failure switch and downstream electrical nodes through the logic judgment module. Specifically, this includes: reading the energized logic relationship definition of the power failure switch from the Redis database; determining whether the power failure switch meets the opening or closing conditions and whether a delay logic is set through the logic judgment module; determining whether the power failure switch should be restored to its original state; and storing the power failure switch state in the Redis database. If the power failure switch does not restore to its original state, the module queries the Redis database to see if the switch has an interlocking switch and determines the state of the interlocking switch. The module then determines whether the interlocking switch meets the opening or closing conditions and whether a delay logic is set through the logic judgment module, determines the interlocking switch state, and stores the interlocking switch state in the Redis database. The logic judgment module determines the status of electrical nodes of downstream switches, buses, and equipment loads. For downstream switches, the logic judgment module determines whether the downstream switch meets the opening or closing conditions and whether delay logic is set, thus determining the downstream switch status and storing it in the Redis database. For downstream buses, the upstream incoming line relationship of the downstream bus is queried through the Redis database, and the logic judgment module determines whether the downstream bus is energized, storing the downstream bus status in the Redis database. For downstream equipment loads, the upstream incoming line relationship of the downstream equipment load is queried by scanning upwards, and the logic judgment module determines whether the downstream equipment load is energized, storing the downstream equipment load status in the Redis database.
[0055] Finally, the simulation analysis module and the electrical node module operate synchronously. The electrical node module uses different colors to indicate the equipment load affected by the power failure switch in the simulation analysis results. The simulation analysis module also feeds back the power failure fault handling decision information and basic information defined in the electrical node module for the equipment load affected by the power failure switch to the user. It automatically provides the user with auxiliary decision-making information such as power failure analysis, intervention measures, and intervention procedures, truly achieving the effect of power failure fault auxiliary decision-making. The simulation analysis module also includes a knowledge and experience module, which classifies the importance of knowledge and experience modules. The equipment load affected after a power failure is automatically sorted according to the power failure handling priority and fed back to the user.
[0056] This invention proposes a simulation analysis method for the consequences of power failure in lightweight nuclear power units, the method comprising:
[0057] Step 1: Build an electrical node model of busbars, switches, and equipment loads.
[0058] Step 1.1: The electrical node module constructs an electrical node model based on the electrical components and their connection relationships in the primary electrical system.
[0059] Step 1.2: Define the attributes and energized logic relationships for electrical nodes. Electrical nodes include buses, switches, and equipment loads. The attribute definitions for electrical nodes include: basic information, physical connection relationships, and power outage fault handling decision information. The energized logic relationship definitions for electrical nodes include: switch closing and opening logic signals; bus energizing and de-energizing logic signals; and equipment load energizing and de-energizing logic signals. The attribute definitions and energized logic relationship definitions for electrical nodes are stored in a Redis database.
[0060] Step 2: Conduct a simulation of the consequences of power failure.
[0061] Step 2.1: The simulation analysis module uses the opening or closing of the switch as the power loss signal, queries the data of all electrical nodes downstream of the switch, and transmits the power loss signal to all downstream electrical nodes. Specifically, a depth-first search algorithm is used to traverse the downstream electrical nodes of the switch sequentially, and the data of the traversed downstream electrical nodes is converted into JSON format and stored in a Redis database; then, the JSON data of the downstream electrical nodes is read from the Redis database, converted into electrical node data, and the power loss signal of the switch is transmitted to the downstream electrical nodes.
[0062] Step 2.2: The simulation analysis module performs logical judgments on the power-out electrical node and the downstream electrical node through the logic judgment module.
[0063] Step 2.2.1: The simulation analysis module reads the energized logic relationship definition of the switch that issues the power failure signal from the Redis database.
[0064] Step 2.2.2: The simulation analysis module uses the logic judgment module to determine whether the switch meets the opening or closing conditions and whether a delay logic is set, to determine whether the switch should be restored to its original state, and stores the switch state in the Redis database.
[0065] Step 2.2.3: If the switch does not return to its original state, the simulation analysis module queries the Redis database to see if the switch has an interlocking switch and determines the status of the interlocking switch. Specifically, the logic judgment module determines whether the interlocking switch meets the opening or closing conditions and whether a delay logic is set, determines the status of the interlocking switch, and stores the status of the interlocking switch in the Redis database.
[0066] Step 2.2.4: The simulation analysis module uses the logic judgment module to determine the status of electrical nodes of downstream switches, buses, and equipment loads. Specifically, for downstream switches, the logic judgment module determines whether the downstream switch meets the opening or closing conditions and whether delay logic is set, determines the status of the downstream switch, and stores the status of the downstream switch in the Redis database; for downstream buses, the upstream incoming line relationship of the downstream bus is queried through the Redis database, the logic judgment module determines whether the downstream bus is energized, and the status of the downstream bus is stored in the Redis database; for downstream equipment loads, the upstream incoming line relationship of the downstream equipment load is queried by scanning upwards, the logic judgment module determines whether the downstream equipment load is energized, and the status of the downstream equipment load is stored in the Redis database.
[0067] Step 3: Conduct a power outage consequence analysis.
[0068] Step 3.1: Based on the logical judgment results of the simulation analysis module, the electrical node module uses different colors to indicate the equipment load affected by the power failure signal;
[0069] Step 3.2: The simulation analysis module will feed back the power failure fault handling decision information and basic information of the equipment load affected by the switch power failure signal to the user.
[0070] Step 3.3: The knowledge and experience module of the simulation analysis module automatically sorts the equipment load affected by the power failure signal according to the importance level and provides feedback to the user.
[0071] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.
Claims
1. A simulation analysis system for the consequences of power failure in a lightweight nuclear power unit, characterized in that, The system includes an electrical node module, a logic judgment module, and a simulation analysis module. The electrical node module constructs an electrical node model based on electrical components and their connections in the primary electrical system, and defines the attributes and live logic relationships of the electrical nodes. The logic judgment module performs logical judgments based on the live logic relationships of the electrical nodes to determine their state. When the simulation analysis module receives a power failure signal from an electrical node, it queries the downstream electrical nodes of the power failure node and transmits the power failure signal to the downstream electrical nodes. The logic judgment module then performs logical judgments on the power failure node and the downstream electrical nodes, and provides the power failure status of the downstream electrical nodes based on the judgment results. The electrical nodes include busbars, switches, and equipment load cells. The electrical node's attribute definition includes: basic information, physical connection relationships, and power failure handling decision information; the switch's energized logic relationship definition includes two types of logic signals: opening and closing. The opening logic signal includes: manual opening signal or slow-cut device opening signal, undervoltage protection signal, whether to define an opening logic signal based on the switch type, and automatic switching or tripping protection signal received from the equipment load supplied by the switch; the switch's closing logic signal includes: manual closing or slow-cut device closing, automatic switching or other start signal from the equipment load supplied by the switch; the bus's energized logic relationship definition includes two types of logic signals: energized and de-energized. For the bus, the energized logic signal is defined as any bus supplying power to the bus... If the switch on the energized busbar is closed, the busbar is considered energized; otherwise, the busbar is defined as a de-energized logic signal. The energization logic relationship of the equipment load includes both energized and de-energized logic signals. For the equipment load energized logic signal, it is defined as follows: if the busbar supplying the equipment load is energized and the switch on the energized busbar is closed, the equipment load is energized; otherwise, the equipment load is defined as a de-energized logic signal. The de-energized signal of the electrical node received by the simulation analysis module specifically refers to the opening or closing of the switch. After receiving the de-energized signal of the electrical node, the simulation analysis module queries the data of all electrical nodes downstream of the switch, using a depth-first search (DFS) algorithm to sequentially traverse the downstream electrical nodes of the switch, transmitting the switch de-energized signal. The simulation analysis module performs logical judgments on the power-loss electrical nodes and downstream electrical nodes through the logic judgment module. Specifically, the simulation analysis module determines whether the switch that issued the power-loss signal has a set delay logic, determines the status of the interlocking switch of the switch, and determines the status of the electrical nodes of the downstream switch, busbar, and equipment load. The electrical node module receives the logical judgment results of the simulation analysis module on the power-loss electrical nodes and downstream electrical nodes, and indicates the equipment load affected by the power-loss signal using different colors. The simulation analysis module feeds back the power-loss fault handling decision information and the basic information of the equipment load affected by the power-loss signal to the user.The simulation analysis module also includes a knowledge and experience module. This module classifies equipment loads by importance and automatically sorts the equipment loads affected by power failure signals according to their importance, then provides feedback to the user.
2. The simulation analysis system for the consequences of power failure in a lightweight nuclear power unit according to claim 1, characterized in that, The electrical node module stores the attribute definitions and energized logic relationship definitions of electrical nodes in a Redis database.
3. A simulation analysis method for the consequences of power failure in a lightweight nuclear power unit, employing the simulation analysis system for the consequences of power failure in a lightweight nuclear power unit as described in any one of claims 1-2, characterized in that, The method includes: Step 1: Build an electrical node model of busbars, switches, and equipment loads; Step 1.1: The electrical node module constructs an electrical node model based on the electrical components and their connection relationships in the primary electrical system; Step 1.2: Define the attributes and live logic relationships for the electrical nodes; Step 2: Conduct a simulation of the consequences of power failure; Step 2.1: The simulation analysis module uses the opening or closing of the switch as a power failure signal, queries the data of all electrical nodes downstream of the switch, and transmits the power failure signal to all downstream electrical nodes; Step 2.2: The simulation analysis module performs logical judgments on the power-out electrical node and the downstream electrical node through the logic judgment module; Step 3: Conduct a power outage consequence analysis; Step 3.1: The electrical node module uses different colors to indicate the equipment load affected by the power failure signal based on the logical judgment result of the simulation analysis module; Step 3.2: The simulation analysis module will feed back the attribute definition information of the equipment load affected by the switch power failure signal to the user; Step 3.3: The knowledge and experience module of the simulation analysis module sorts the equipment load affected by the power failure signal according to the importance level and provides feedback to the user.
4. The simulation analysis method for the consequences of power failure in a lightweight nuclear power unit according to claim 3, characterized in that, The attribute definition of the electrical node in step 1.2 includes: basic information, physical connection relationship, and power failure handling decision information; the energized logic relationship definition of the electrical node includes: switch closing and opening logic signals; bus energizing and de-energizing logic signals; equipment load energizing and de-energizing logic signals; the attribute definition and energized logic relationship definition data of the electrical node are stored in the Redis database.
5. The simulation analysis method for the consequences of power failure in a lightweight nuclear power unit according to claim 4, characterized in that, In step 2.1, querying the data of all electrical nodes downstream of the switch specifically involves: using a depth-first search algorithm to traverse the electrical nodes downstream of the switch sequentially, converting the traversed downstream electrical node data into JSON format, and storing it in the Redis database; then reading the downstream electrical node JSON data from the Redis database and converting it into electrical node data.
6. The simulation analysis method for the consequences of power failure in a lightweight nuclear power unit according to claim 5, characterized in that, The simulation analysis module in step 2.2 performs logical judgments on the power-out electrical node and downstream electrical node through the logic judgment module, specifically including: Step 2.2.1: The simulation analysis module reads the energized logic relationship definition of the switch that issued the power failure signal from the Redis database; Step 2.2.2: The simulation analysis module uses the logic judgment module to determine whether the switch meets the opening or closing conditions and whether a delay logic is set, to determine whether the switch has returned to its original state, and stores the switch state in the Redis database; Step 2.2.3: If the switch does not return to its original state, the simulation analysis module queries the Redis database to see if the switch has any interlocking switches and determines the status of the interlocking switches. Step 2.2.4: The simulation analysis module determines the status of the electrical nodes of downstream switches, buses and equipment loads through the logic judgment module.
7. The simulation analysis method for the consequences of power failure in a lightweight nuclear power unit according to claim 6, characterized in that, Step 2.2.3, determining the status of the interlocking switch, specifically includes: using a logic judgment module to determine whether the interlocking switch meets the opening or closing conditions and whether a delay logic is set, determining the status of the interlocking switch, and storing the status of the interlocking switch in the Redis database.
8. The simulation analysis method for the consequences of power failure in a lightweight nuclear power unit according to claim 7, characterized in that, In step 2.2.4, the simulation analysis module determines the status of electrical nodes of downstream switches, buses, and equipment loads through the logic judgment module. Specifically, this includes: for downstream switches, determining whether the downstream switch meets the opening or closing conditions and whether delay logic is set, thus determining the downstream switch status and storing it in the Redis database; for downstream buses, querying the upstream incoming line relationship of the downstream bus through the Redis database, determining whether the downstream bus is energized through the logic judgment module, and storing the downstream bus status in the Redis database; for downstream equipment loads, querying the upstream incoming line relationship of the downstream equipment load by upward scanning, determining whether the downstream equipment load is energized through the logic judgment module, and storing the downstream equipment load status in the Redis database.