Sodium-cooled fast reactor DCS power supply failure analysis method

Abstract

The invention belongs to the technical field of nuclear power plant debugging and operation and maintenance, and aims to solve the problems that a traditional DCS power supply failure analysis method is tedious in processing process, poor in timeliness, incomplete in analysis and the like. The invention provides a sodium-cooled fast reactor DCS power supply failure analysis method, which comprises the steps of formulating a node table according to an engineering design file, making a relation table through the node table, sequentially combining nodes in the node table in pairs to form a plurality of relation tables, and selecting an analysis object according to a power supply structure analysis result. The method comprises the following steps: respectively analyzing an affected object upwards and downwards step by step, displaying a whole analysis link, configuring an equipment node, a circuit breaker and an influence control relationship, setting authority to carry out authority control on modification operation, respectively setting the authority, importing a completed relationship table, and generating a power loss analysis table. The power loss analysis table provided by the invention can help maintenance personnel to quickly position equipment influenced by power loss of the DCS cabinet and realize quick processing of a power loss fault.

Description

Technical Field

[0001] The present application belongs to the technical field of nuclear power plant commissioning and operation and maintenance, and in particular relates to a method for analyzing power supply failure of a sodium-cooled fast reactor DCS. Background Art

[0002] The DCS (Distributed Control System), the nerve center of a nuclear power plant, controls and monitors all critical equipment. A power failure in the DCS cabinet can lead to uncontrollable equipment or malfunctions, seriously impacting the unit's status. When a DCS cabinet loses power, maintenance personnel must urgently address the power failure and analyze its impact, including which equipment has lost control or malfunctioned, and which interlocking devices have been triggered.

[0003] Traditional power outage handling methods rely on searching a signal point table to determine which signals the cabinet is collecting and which devices it controls. When a cabinet loses power, they determine the state of the controlled devices, whether they will remain operational or shut down due to a fault, the consequences of a device shutdown, and the necessary measures. This time-consuming power outage analysis seriously impacts the timely handling of power outage issues. Summary of the Invention

[0004] The purpose of this application is to provide a sodium-cooled fast reactor DCS power supply failure analysis method to solve the problems of traditional DCS power supply failure analysis methods such as cumbersome processing process, poor timeliness, and incomplete analysis. When the DCS cabinet loses power, it is convenient for instrumentation and control personnel to quickly locate the cause of the power failure, the equipment affected by the power failure, the impact of the power-lost equipment on the unit, and the subsequent remedial measures to be taken; when the unit is under maintenance, it is convenient to identify the impact of work such as busbar outage on the DCS cabinet and control equipment.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A sodium-cooled fast reactor DCS power supply failure analysis method, comprising:

[0007] Step 1: Create a node table in Excel format based on the engineering design document. Then create a relationship table based on the node table. Combine the nodes in the node table in pairs in order to form multiple relationship tables.

[0008] Step 2: Based on the power supply structure analysis results, select the analysis object and analyze the objects affected by it step by step upward and downward;

[0009] Step 3: Display the entire analysis chain through graphics;

[0010] Step 4: Use the user management interface to add, delete, and modify the affected devices, configure device nodes, circuit breakers, and impact control relationships, and set permissions to control modification operations.

[0011] Step 5: Set the permissions for management personnel, instrumentation and control personnel, and statisticians respectively;

[0012] Step 6: Import the completed relationship table to generate a power failure analysis table.

[0013] According to one embodiment of the present application, in step 1, the engineering design documents include a power supply cable list, a cabinet assembly drawing, an IO list, and a system design document.

[0014] According to one embodiment of the present application, step 1 includes:

[0015] Step 1.1: Create a node table for electrical cabinets, electrical cabinet switches, DCS power supply cabinets, DCS power supply cabinet switches, and functional cabinets using the power supply cable list;

[0016] Step 1.2: Create a node table for the 220VAC switches and 24 / 48VDC switches in the functional cabinet using the cabinet assembly drawing.

[0017] Step 1.3: Create a list of devices affected by the 24 / 48VDC switch power supply based on the signal bit number in each functional cabinet in the IO list, and form a node table;

[0018] Step 1.4: Use the system design documents to sort out the functions of each device, analyze the impact of cabinet failure on the device and the treatment measures, and form a node table;

[0019] Step 1.5: Combine the node tables from step 1.1 to step 1.4 in pairs in order to form multiple relationship tables as import files.

[0020] According to one embodiment of the present application, the functional cabinets include a DCS control cabinet, a network cabinet, and a relay cabinet.

[0021] According to an embodiment of the present application, in step 2, the entire analysis link is displayed in a tree diagram.

[0022] According to one embodiment of the present application, step 2 includes:

[0023] Step 2.1: Starting from the analysis object, analyze downward step by step to the device objects affected by this object;

[0024] Step 2.2: Taking the analysis object as the end point, trace back step by step to the upstream power supply units that affect this object. The end point of the tracing is the power supply electrical cabinet.

[0025] According to one embodiment of the present application, step 3 includes:

[0026] Step 3.1: Use a tree-like directory to display the control, inclusion, and ownership relationships between devices at all levels and at the same level;

[0027] Step 3.2: Set up the input box, upstream and downstream analysis, quick positioning, query all nodes, result export, and device modification function menu;

[0028] Step 3.3: Set up a mini-map at the top of the interface;

[0029] Step 3.4: Set the positioning function to display all current nodes, perform intelligent associative search, and locate the search object in the center of the screen for viewing;

[0030] Step 3.5: Display information, including the selected device, list of affected devices, source, and risk response measures;

[0031] Step 3.6: For each node legend, set the symbol consistent with the design drawing.

[0032] According to an embodiment of the present application, in step 3.1, the tree directory is displayed vertically and hierarchically according to device type.

[0033] According to an embodiment of the present application, in step 3.4, all current nodes include cabinets, circuit breakers, and equipment.

[0034] According to one embodiment of the present application, step 4 includes:

[0035] Step 4.1: Provide a user management interface to delete and modify the affected devices;

[0036] Step 4.2: Add affected devices, including adding device nodes, adding circuit breakers, and the impact / control relationship between the devices;

[0037] Step 4.3: Set permissions.

[0038] Compared with the prior art, the sodium-cooled fast reactor DCS power supply failure analysis method provided by this application has the following advantages:

[0039] Beneficial effects:

[0040] According to this application, when a DCS cabinet loses power, maintenance and control personnel can quickly locate the equipment affected by the power outage, the impact of the power-lost equipment on the unit, and the subsequent solutions, greatly improving the speed and accuracy of handling power outage problems.

[0041] Furthermore, the power outage analysis table provided by this application can help maintenance personnel quickly locate equipment affected by a DCS cabinet power outage and quickly resolve power outage faults. This function is not only applicable to DCS cabinet power outages, but also allows for rapid location of the DCS cabinet where the equipment is located during equipment maintenance, facilitating the inspection of wiring, configuration correctness, and other tasks. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solution of this application, the following is a brief introduction to the drawings required for the technical description.

[0043] Figure 1 Flowchart of the sodium-cooled fast reactor DCS power supply failure analysis method provided in this application;

[0044] Figure 2 An example diagram of the node table provided for this application;

[0045] Figure 3 Example diagram of the relationship table provided for this application;

[0046] Figure 4 An example diagram of the countermeasures provided for this application. DETAILED DESCRIPTION

[0047] The following is further explained in detail through specific implementation methods.

[0048] like Figure 1 As shown, the present application provides a sodium-cooled fast reactor DCS power supply failure analysis method, comprising:

[0049] Step 1: Power supply structure analysis: Create a node table in Excel format based on engineering design documents such as the power supply cable list, cabinet assembly drawings, IO list, and system design documents. Then, create a relationship table based on the node table. Combine the nodes in the node table in pairs in order to form multiple relationship tables.

[0050] Step 2: Upstream and downstream analysis: Based on the power supply structure analysis results, select the analysis object and analyze the objects affected by it step by step, both upward and downward;

[0051] Step 3: Display design: Based on steps 1 and 2, use a tree diagram to display the entire analysis chain;

[0052] Step 4: Modify the device affected by power outage: Use the user management interface to add, delete, and modify the affected devices, configure device nodes, circuit breakers, and impact control relationships, and set permissions to control modification operations.

[0053] Step 5: Authority setting: including three roles: management personnel, instrumentation and control personnel, and statisticians, each with its own authority;

[0054] Step 6: Import the relational table: Import the completed relational table and generate a power failure analysis table to achieve the above functions.

[0055] Step 1 specifically includes:

[0056] Step 1.1: Create a node table for electrical cabinets, electrical cabinet switches, DCS power supply cabinets, DCS power supply cabinet switches, and functional cabinets (DCS control cabinets / network cabinets / relay cabinets) using the power supply cable list;

[0057] Step 1.2: Create a node table for the 220VAC switches and 24 / 48VDC switches in the functional cabinet using the cabinet assembly drawing.

[0058] Step 1.3: Create a list of devices affected by the 24 / 48VDC switch power supply based on the signal bit number in each functional cabinet in the IO list, and form a node table;

[0059] Step 1.4: Use the system design documents to sort out the functions of each device, analyze the impact of cabinet failure on the device and the treatment measures, and form a node table;

[0060] Step 1.5: Combine the node tables from step 1.1 to step 1.4 in pairs in order to form multiple relationship tables as import files.

[0061] Step 2 specifically includes:

[0062] Step 2.1: Starting from the analysis object, analyze downward step by step to the device objects affected by this object;

[0063] Step 2.2: Taking the analysis object as the end point, trace back step by step to the upstream power supply units that affect this object. The end point of the tracing is the power supply electrical cabinet.

[0064] Step 3 specifically includes:

[0065] Step 3.1: Use a tree directory to display the control, inclusion, and ownership relationships between devices at all levels and at the same level. For easy viewing, the tree directory is displayed vertically and layered according to device type;

[0066] Step 3.2: Set up the input box, upstream and downstream analysis, quick positioning, query all nodes, result export, and device modification function menu;

[0067] Step 3.3: Considering that the directory is deep and the graphics are large, set a small map at the top of the interface for quick viewing;

[0068] Step 3.4: To facilitate searching, set the positioning function to display all current nodes (cabinets / circuit breakers / devices), perform intelligent associative search, and locate the search object in the center of the screen for viewing;

[0069] Step 3.5: The following information is displayed on the right side of the structure diagram interface. Select the device (device code / device type / room), affected device list (downstream), source (upstream, one level back), and risk response measures;

[0070] Step 3.6: For each node legend, set the symbol consistent with the design drawing. The symbol can be modified by yourself.

[0071] Step 4 specifically includes:

[0072] Step 4.1: Provide a user management interface to delete and modify affected devices;

[0073] Step 4.2: Add affected devices, including adding device nodes, adding circuit breakers, and the impact / control relationship between the devices;

[0074] Step 4.3: Set appropriate permissions to ensure that modifications are controllable.

[0075] Example 1

[0076] This application implements the above method, which specifically includes the following process:

[0077] (1) Analysis of power supply structure

[0078] A power outage analysis table is developed, which includes the entire power supply path relationship from the upstream switchgear to the downstream electrical equipment, namely: the switchgear, switchgear circuit breaker, DCS power supply cabinet, power supply cabinet circuit breaker, functional cabinet (DCS control cabinet / network cabinet / relay cabinet), 220V circuit breaker in the cabinet, 24V / 48V circuit breaker converted from 220V circuit breaker in the cabinet, and the logical connection of the equipment affected by the circuit breaker. The table is displayed in order according to the equipment level for easy viewing.

[0079] (2) Upstream and downstream analysis

[0080] a. Determine the analysis object

[0081] The determination method includes selecting the object on the map, intelligently associating the first few digits of the device code entered by the user in the search box, and providing recommended analysis objects through a drop-down method.

[0082] b. Downstream Analysis

[0083] Starting from the analysis object, analyze downward step by step to the device-level objects affected by this object.

[0084] c. Upstream analysis

[0085] Taking the analysis object as the end point, trace back step by step to the upstream power supply units that affect this object, and the end point of the tracing back is the power supply switch cabinet.

[0086] (3) Risks and responses

[0087] The system lists corresponding countermeasures based on the analyzed affected devices.

[0088] (4) Display function

[0089] a.Tree branches

[0090] A tree directory is used to display the control, inclusion and ownership relationships between devices at all levels and the same level. For easy viewing, the tree directory is displayed vertically and in layers according to device type.

[0091] b. Thumbnail map

[0092] Considering that the directory is deep and the graphics are large, a small map is set at the top of the interface for quick viewing.

[0093] c. Quick positioning

[0094] To facilitate searching, set the positioning function. Use the drop-down menu in the search box to display all current nodes (cabinets / circuit breakers / devices). Perform intelligent associative search and locate the search object in the center of the screen for viewing.

[0095] d. Analysis result information display

[0096] The following information is displayed on the right side of the structure diagram interface: selected equipment (equipment code / equipment type / room), affected equipment list (downstream), source (upstream, one level back), and risk response measures.

[0097] e. Main Menu

[0098] Set the input box, upstream and downstream analysis, quick positioning, query all nodes, result export, and device modification function menu.

[0099] f. Figure legend

[0100] For each node legend, set the symbol consistent with the design drawing, and users can modify the symbol by themselves.

[0101] (5) Power failure affects the device modification function

[0102] a. Provide a user management interface to delete and modify affected devices.

[0103] b. Adding affected devices. This includes adding device nodes, adding circuit breakers, and adding the impact / control relationship between the devices.

[0104] c. Set appropriate permissions to ensure that modifications are controllable.

[0105] (6) Rights Management

[0106] The system includes three roles: management personnel, instrumentation and control personnel, and statisticians, each with its own permissions.

[0107] (7) Standard template and content maintenance

[0108] In order to avoid inconsistent and non-standard formats due to human behavior, a unified table template is adopted. Analysis tables are added or modified according to the set table template, and exported according to the defined analysis table template.

[0109] a. Ability to import procedures in .xlsx data format;

[0110] b. Content modification function: add, delete, modify.

[0111] Example 2

[0112] This embodiment demonstrates the failure analysis function of a nuclear power unit.

[0113] The instrumentation and control personnel prepare a power failure analysis table, including the power supply bus, switch cabinet, switch cabinet circuit breaker, DCS power supply cabinet, power supply cabinet switch, control cabinet (relay cabinet), 220V circuit breaker, 48V / 24V circuit breaker, control equipment, and solutions.

[0114] The power failure analysis table is extracted into three tables using Excel formulas:

[0115] (1) Node table

[0116] The node table is a table that makes each column of data in the power failure analysis table into a separate table, which is used as the basic unit of the power failure analysis diagram. Figure 2 shown.

[0117] (2) Relationship table

[0118] The relationship table is used to connect the nodes in the node table in series, and also to connect the basic units of the power failure analysis diagram, which can realize the tree diagram function, such as Figure 3 shown.

[0119] (3) Response measures table

[0120] The countermeasures table lists the treatment methods for each device when power is lost, as the countermeasures for the device power outage, such as Figure 4 shown.

[0121] The administrator can import the power outage analysis table, including the node table, relationship table, and response table. After successful import, the power outage analysis table is generated. The search bar can be used to search for each node and each device for quick location, which is simple and easy to operate.

[0122] The present invention can implement the basic method of DCS power outage analysis. By identifying each power supply node and the final affected equipment and listing the power outage treatment measures, when a power outage event occurs, the impact of the power outage node on the equipment and the treatment method can be quickly located, greatly improving the efficiency and accuracy of handling power outage events.

[0123] The present invention can carry out power failure analysis in advance for nuclear power units under construction, facilitating the handling of power failure events.

[0124] The present invention can quickly analyze and handle power outage events for in-service nuclear power units. Before busbar maintenance work is carried out, the affected area can be analyzed in advance and repowering measures or isolation measures can be prepared.

[0125] The present invention uses the power failure analysis table as the basis. The instrumentation and control personnel compile a node table, a relationship table, and a response measure table, which are imported into the power failure analysis module by the management personnel to generate a tree display diagram. The equipment under each power supply node, the impact of equipment power failure, and the equipment power failure treatment method can be viewed by searching.

[0126] The above description is only a specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in this application should be covered by the scope of protection of the present application.

Claims

1. A sodium-cooled fast reactor DCS power supply failure analysis method, characterized in that: include: Step 1: Create a node table in Excel format based on the engineering design document. Then create a relationship table based on the node table. Combine the nodes in the node table in pairs in order to form multiple relationship tables. Step 2: Based on the power supply structure analysis results, select the analysis object and analyze the objects affected by it step by step upward and downward; Step 3: Display the entire analysis chain through graphics; Step 4: Use the user management interface to add, delete, and modify the affected devices, configure device nodes, circuit breakers, and impact control relationships, and set permissions to control modification operations. Step 5: Set the permissions for management personnel, instrumentation and control personnel, and statisticians respectively; Step 6: Import the completed relationship table to generate a power failure analysis table.

2. The sodium-cooled fast reactor DCS power supply failure analysis method according to claim 1, characterized in that: In step 1, the engineering design documents include the power cable list, cabinet assembly drawing, I / O list, and system design documents.

3. The sodium-cooled fast reactor DCS power supply failure analysis method according to claim 1, characterized in that: Step 1 includes: Step 1.1: Create a node table for electrical cabinets, electrical cabinet switches, DCS power supply cabinets, DCS power supply cabinet switches, and functional cabinets using the power supply cable list; Step 1.2: Create a node table for the 220VAC switches and 24 / 48VDC switches in the functional cabinet using the cabinet assembly drawing. Step 1.3: Create a list of devices affected by the 24 / 48VDC switch power supply based on the signal bit number in each functional cabinet in the IO list, and form a node table; Step 1.4: Use the system design documents to sort out the functions of each device, analyze the impact of cabinet failure on the device and the treatment measures, and form a node table; Step 1.5: Combine the node tables from step 1.1 to step 1.4 in pairs in order to form multiple relationship tables as import files.

4. The sodium-cooled fast reactor DCS power supply failure analysis method according to claim 3, characterized in that: Functional cabinets include DCS control cabinet, network cabinet and relay cabinet.

5. The sodium-cooled fast reactor DCS power supply failure analysis method according to claim 1, characterized in that: In step 2, the entire analysis link is presented in a tree diagram.

6. The sodium-cooled fast reactor DCS power supply failure analysis method according to claim 1, characterized in that: Step 2 includes: Step 2.1: Starting from the analysis object, analyze downward step by step to the device objects affected by this object; Step 2.2: Taking the analysis object as the end point, trace back step by step to the upstream power supply units that affect this object. The end point of the tracing is the power supply electrical cabinet.

7. The sodium-cooled fast reactor DCS power supply failure analysis method according to claim 1, characterized in that: Step 3 includes: Step 3.1: Use a tree-like directory to display the control, inclusion, and ownership relationships between devices at all levels and at the same level; Step 3.2: Set up the input box, upstream and downstream analysis, quick positioning, query all nodes, result export, and device modification function menu; Step 3.3: Set up a mini-map at the top of the interface; Step 3.4: Set the positioning function to display all current nodes, perform intelligent associative search, and locate the search object in the center of the screen for viewing; Step 3.5: Display information, including the selected device, list of affected devices, source, and risk response measures; Step 3.6: For each node legend, set the symbol consistent with the design drawing.

8. The sodium-cooled fast reactor DCS power supply failure analysis method according to claim 7, characterized in that: In step 3.1, the tree directory is displayed vertically and hierarchically according to device type.

9. The sodium-cooled fast reactor DCS power supply failure analysis method according to claim 7, characterized in that: In step 3.4, all nodes currently include cabinets, circuit breakers, and devices.

10. The sodium-cooled fast reactor DCS power supply failure analysis method according to claim 1, characterized in that: Step 4 includes: Step 4.1: Provide a user management interface to delete and modify the affected devices; Step 4.2: Add affected devices, including adding device nodes, adding circuit breakers, and the impact / control relationship between the devices; Step 4.3: Set permissions.

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