A nuclear power plant power circuit and load isolation auxiliary platform

Abstract

This invention provides an auxiliary platform for the isolation of power circuits and loads in nuclear power plants, comprising: a standard state input module for providing users with input of the standard state of the nuclear power plant as specified in the operating technical specifications; a power supply and load object construction module for constructing objects from power sources to loads; an external information interface module for inputting the actual availability status of power supplies and switches, and the current standard state of the nuclear power plant from the nuclear power plant control system; a logic calculation module for calculating the number of unavailable devices; a simulation mapping module for providing users with the function of simulating and isolating various systems and devices in the power circuit; and a human-machine interaction module for inputting and outputting corresponding modules. This invention automatically analyzes and statistically analyzes the unavailability of nuclear power plant power circuit equipment and loads, avoiding extensive work of consulting drawings and errors caused by human negligence.

Description

Technical Field

[0001] This invention relates to the field of nuclear power plant operation and maintenance technology, and in particular to a nuclear power plant power circuit and load isolation auxiliary platform. Background Technology

[0002] Nuclear power plants, for preventative and corrective maintenance purposes, require the isolation of power circuit components or corresponding loads, which can render one or more devices unavailable. According to the nuclear power plant's operating specifications, under each standard operating condition, the unavailability of each load poses a corresponding risk to the nuclear power plant system, and the operating unit must effectively manage these unavailability (I0) quantities. Load unavailability can be caused by the unavailability of the equipment itself, the unavailability of its power supply, or indirectly by the unavailability of the control power supply of its power circuit equipment. When performing isolation, operators need to consult numerous relevant drawings for confirmation, resulting in a heavy workload and significantly reduced efficiency. Furthermore, depending on the operator's skill level, calculations can sometimes be inaccurate due to overlooking deeper levels of unavailability. Current circuit simulation technology focuses on circuit stability calculations, which is difficult to match with the power supply isolation methods used in nuclear power plants and cannot effectively replace manual isolation. Summary of the Invention

[0003] The purpose of this invention is to provide an auxiliary platform for isolating power circuits and loads in nuclear power plants, which solves the problem of calculating the number of unavailable circuits and loads specified in the nuclear power operation technical specifications due to isolation or unavailability of nuclear power plant circuits and loads.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A nuclear power plant power circuit and load isolation auxiliary platform, comprising:

[0006] The standard status input module is used to provide users with the standard status inputs for nuclear power plants as specified in the operating technical specifications.

[0007] The power supply and load object construction module is used to construct objects from power sources to loads;

[0008] The external information interface module is used to input the actual availability status of power supply and switches from the nuclear power plant control system, as well as the current standard status of the nuclear power plant.

[0009] The logic calculation module is used to calculate the number of unavailable devices;

[0010] The simulation mapping module is used to provide users with the function of simulating and isolating various systems and equipment in the power circuit;

[0011] The human-computer interaction module is used for the input and output of the corresponding module.

[0012] Furthermore, the standard state input module is used to provide generation conditions and quantity limits that are not available in the standard state.

[0013] Furthermore, the power supply includes a plant transformer, an auxiliary transformer, an emergency diesel engine, and a storage battery, while the circuit equipment includes a busbar, an intermediate transformer, and a switch.

[0014] Furthermore, the load is an electric motor and a charger.

[0015] Furthermore, the logic calculation module calculates the number of unusable devices and provides a list based on the actual or simulated standard state of a nuclear power plant, following certain logic.

[0016] Furthermore, upon receiving a user request, the simulation mapping module independently maps and replicates a real power circuit for the user, separate from the actual power circuit state, and displays the modified power circuit state, unavailable information, and list to the user through the logic calculation module.

[0017] Furthermore, the simulation mapping module is used to provide users with isolation plans for power plant circuit objects under any standard power plant conditions, and to provide references for the preparation of equipment operation and maintenance plans in advance for operation plans, production plans and overhaul plans.

[0018] Furthermore, the human-computer interaction module is used to display currently unavailable objects in the form of a circuit diagram and provide unavailability calculation results, or to allow users to simulate the unavailability of specific objects, display unavailable objects caused by the simulation state, and provide calculation results.

[0019] Furthermore, the human-computer interaction module is used to provide the input page required by the standard state input module, the object construction page required by the power supply and load object construction module, the power circuit diagram and unavailable information page, the simulation page, and the user management page.

[0020] The nuclear power plant power circuit and load isolation auxiliary platform also includes a user management module for managing user authorization and granting different functions to users of the platform based on different authorization levels.

[0021] Compared with the prior art, the nuclear power plant power circuit and load isolation auxiliary platform provided by the present invention has the following advantages:

[0022] This invention automatically analyzes and statistically analyzes the unavailability of power circuit equipment and loads in nuclear power plants, avoiding extensive work of consulting drawings and errors caused by human negligence.

[0023] Furthermore, this invention enables different nuclear power plants and other users who require power circuit equipment and load unavailability risk analysis to build independent power circuit and load auxiliary isolation systems without the need for repeated development.

[0024] Furthermore, this invention incorporates the unavailability of equipment caused by control power supply into the system, further clarifying the mutual influence of power supplies of different series and different voltage levels.

[0025] Furthermore, this invention provides users with independent simulation capabilities, which can be used in different scenarios such as planning and training.

[0026] Furthermore, this invention allows users to add or remove devices from an existing system without modifying the program code.

[0027] Furthermore, the present invention introduces visualization during object construction, using drag-and-drop methods, providing a WYSIWYG experience that is convenient and quick. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 The inter-module interface logic diagram provided for this invention;

[0030] Figure 2 The main functional application flowchart provided by this invention. Detailed Implementation

[0031] The following detailed description provides further details on specific implementation methods.

[0032] like Figure 1 As shown, this invention provides an auxiliary platform for power circuit and load isolation in nuclear power plants, including a standard state input module, a power supply and load object construction module, a switch state input module, a logic calculation module, a simulation mapping module, and a human-computer interaction module. This invention provides a basic platform for users to build their own power circuits and loads. Users input restrictions on the unavailability of electrical equipment and load equipment under standard states specified in the nuclear power plant's operating technical specifications. The platform displays and calculates the types and quantities of unavailable equipment under specific simulated states and lists the unavailable equipment. Specifically, the modules of this invention are as follows:

[0033] Standard State Input Module: As the basis for building a specific nuclear power plant system, it inputs the standard state specified in the operating technical specifications, under which the nuclear power plant system or equipment cannot be defined.

[0034] Power supply and load object construction module: used to construct objects from power source to load. Power source includes plant transformer, auxiliary transformer, emergency diesel engine, storage battery, etc. Circuit equipment includes busbar, intermediate transformer, switch (circuit breaker / contactor), etc. Load includes motor and charger, etc.

[0035] External information interface module: used to input the actual availability status of power supply and switches from the nuclear power plant control system, and the current standard status of the nuclear power plant;

[0036] Logic calculation module: Based on the actual or simulated standard state of a nuclear power plant, it calculates the number of unavailable devices according to certain logic and provides a list;

[0037] Simulation mapping module: Provides users with the function of simulating and isolating various systems and equipment in the power circuit;

[0038] Human-computer interaction module: Provides a way to display currently unavailable objects in the form of a circuit diagram and gives the calculation results of unavailability, or provides a way for users to simulate the unavailability of specific objects, display the unavailability caused by the simulation state, and give the calculation results.

[0039] The standard state input module is the fundamental standard for users to complete applications using this invention. This module provides users with input of nuclear power plant standard states specified in the operating technical specifications, as well as the quantity restrictions that are unavailable under these standard states. The input table fields are shown in Table 1:

[0040] Table 1 Input Fields

[0041]

[0042] The power supply and load object construction module allows users to build a complete power supply system, classifying equipment in the nuclear power plant's power supply system into three categories: power sources, circuit equipment, and loads. The construction of a power source object requires at least the following attributes: equipment code, equipment name, power type, downstream switch, control power supply, unavailability level of the equipment under each standard state, and current equipment availability status (operating, standby, isolated). The construction of a circuit equipment object requires at least the following attributes: equipment code, equipment name, equipment type (bus, circuit breaker, contactor, intermediate transformer), upstream switch or bus, downstream switch or bus, control power source, unavailability level of the equipment under each standard state, and current equipment availability status (operating, standby, isolated). The construction of a load object requires at least the following attributes: equipment code, equipment name, upstream switch, unavailability level of the equipment under each standard state, and current equipment availability status (operating, standby, isolated). This module is displayed on the human-computer interaction module page, providing users with a visual method for constructing power circuits. Users can construct a complete nuclear power plant power circuit system by dragging, dropping, and inputting other attributes.

[0043] The external information interface module accepts input from other management systems of the nuclear power plant, modifies the "current equipment availability status (running, standby, isolated)" attributes of various circuit objects according to the actual status, and provides a user-standard information interface to comprehensively obtain the status information of the power circuit.

[0044] The standard status input module, power and load object construction module, and external information interface module provide functions and user inputs dependent on them. The aforementioned logic calculation module provides logic calculation methods that are unavailable for the device, including: classification, merging, list output, (multiple) upstream power source queries, and (multiple) downstream load queries. This significantly improves user work efficiency and avoids problems such as consulting numerous drawings and calculation errors.

[0045] Upon receiving a user request, the simulation mapping module independently maps and replicates a real power circuit for the user, separate from the actual power circuit state. This allows the user to modify the "current equipment availability status (running, standby, isolated)" attribute of the power circuit object, and displays the modified power circuit status, unavailability information, and a list to the user through the logic calculation module. The simulation mapping module provides users with isolation plans for power plant circuit objects under any standard power plant state, offering a reference for advance planning of equipment operation and maintenance for operational, production, and overhaul plans.

[0046] The human-computer interaction module provides a page for each of the other modules mentioned above that require human-computer interaction, so as to complete the input and output functions of the corresponding modules.

[0047] Furthermore, the nuclear power plant power circuit and load isolation auxiliary platform also includes a user management module. This invention technically ensures that no control commands can be sent to the nuclear power plant system, serving only as an auxiliary application for isolation. In addition, this invention employs a three-level access control system for users.

[0048] like Figure 1 As shown, this invention establishes a general diagram of the power circuit equipment and loads of a nuclear power plant through a power supply and load object construction module, and displays the dynamic circuit diagram to the user through different colors using an external information interface module. Based on the aforementioned circuit diagram and the equipment unavailability restrictions defined by the standard status input module, the logic calculation module calculates the current equipment unavailability information and list through certain logic, and provides a reminder to the user. The simulation module can replicate the aforementioned dynamic circuit diagram and allows users to set the status of all circuit equipment objects, and outputs the results under the simulation status through the logic calculation module. The human-computer interaction module provides the input page required by the standard status input module, the object construction page required by the power supply and load object construction module, the power circuit diagram and unavailability information page, the simulation page, and the user management page.

[0049] like Figure 2 As shown, when using this invention, the user inputs the specific power plant's operating technical specifications and actual power circuit equipment through the standard status input module and the power supply and load object construction module. The actual status of the power plant equipment input through the external information interface module will then display the current unavailable status. The unavailable status can also be obtained through simulation operations on the simulation page. During use, users can flexibly configure the system through the standard status input module and the power supply and load object construction module to accommodate changes in technical specifications or the addition or removal of equipment.

[0050] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A power circuit and load isolation auxiliary platform for a nuclear power plant, characterized in that, include: The standard status input module is used to provide users with the standard status input of the nuclear power plant as specified in the operating technical specifications, and to provide the conditions and quantity restrictions that are not available under the standard status. The power supply and load object construction module is used to construct objects from power sources to loads; The external information interface module is used to input the actual availability status of power supply and switches from the nuclear power plant control system, as well as the current standard status of the nuclear power plant. The logic calculation module is used to calculate the number of unavailable devices. Based on the actual or simulated standard state of a nuclear power plant, it calculates the number of unavailable devices and provides a list according to the logic of classification, merging, list output, upstream power source query, and downstream load query. The simulation mapping module is used to provide users with the function of simulating and isolating various systems and devices of the power circuit. After receiving a user request, the simulation mapping module maps and replicates a real power circuit for the user independently of the actual power circuit state, and displays the modified power circuit state, unavailable information and list display to the user through the logic calculation module. The human-computer interaction module is used for the input and output of the corresponding module.

2. The nuclear power plant power circuit and load isolation auxiliary platform according to claim 1, characterized in that, The power supply includes a plant transformer, an auxiliary transformer, an emergency diesel engine, and a storage battery, while the circuit equipment includes a busbar, an intermediate transformer, and a switch.

3. The nuclear power plant power circuit and load isolation auxiliary platform according to claim 1, characterized in that, The load consists of an electric motor and a charger.

4. The nuclear power plant power circuit and load isolation auxiliary platform according to claim 1, characterized in that, The simulation mapping module is used to provide users with isolation plans for power plant circuit objects under any standard power plant conditions, and to provide references for the preparation of equipment operation and maintenance plans in advance, including operation plans, production plans, and overhaul plans.

5. The nuclear power plant power circuit and load isolation auxiliary platform according to claim 1, characterized in that, The human-computer interaction module is used to display currently unavailable objects in the form of a circuit diagram and provide the calculation results of unavailability, or to allow users to simulate the unavailability of specific objects, display the unavailability caused by the simulation state, and provide the calculation results.

6. The nuclear power plant power circuit and load isolation auxiliary platform according to claim 1, characterized in that, The human-computer interaction module is used to provide the input page required by the standard status input module, the object construction page required by the power supply and load object construction module, the power circuit diagram and unavailable information page, the simulation page, and the user management page.

7. The nuclear power plant power circuit and load isolation auxiliary platform according to claim 1, characterized in that, It also includes a user management module, which manages user authorization and grants different functions to users of the platform based on different authorization levels.

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