CN112199856B - Modelica-based nuclear reactor pipeline system model construction and strong coupling method and device - Google Patents
Modelica-based nuclear reactor pipeline system model construction and strong coupling method and device Download PDFInfo
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- CN112199856B CN112199856B CN202011147142.2A CN202011147142A CN112199856B CN 112199856 B CN112199856 B CN 112199856B CN 202011147142 A CN202011147142 A CN 202011147142A CN 112199856 B CN112199856 B CN 112199856B
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- G06F17/13—Differential equations
Abstract
The invention discloses a modelica-based nuclear reactor pipeline system model construction and strong coupling method and a modelica-based nuclear reactor pipeline system model construction and strong coupling device, wherein the method comprises the following steps: decomposing a nuclear reactor piping system into different subsystems according to physical quantities transferred by the system; building a component model in each subsystem model library based on a modelica language; converting all the component models into first-order differential algebraic equations; and solving the first-order differential algebraic equation to complete multi-professional strong coupling simulation of the nuclear reactor loop system. By adopting the method, the authenticity of reflecting the complex essential relationship among the multiple fields in the nuclear reactor pipeline system can be increased by adopting a multi-field unification, data formulation and object-oriented modeling mode.
Description
Technical Field
The invention relates to the technical field of modeled nuclear reactors, in particular to a modelica-based nuclear reactor pipeline system model construction and strong coupling method and device.
Background
In nuclear reactors currently used for commercial operation, cooling water is mainly used as a coolant for the nuclear reactor. The optimal arrangement of the large number of pipe systems present contributes to a safe and efficient removal of the heat generated by the nuclear reactor core, and therefore the quality of the nuclear reactor pipe systems has a great influence on the operation of the reactor. When the performance of the management system is evaluated, a good system model can be established to bring great convenience to the performance evaluation and improve the accuracy of the system performance evaluation.
Modeling software such as Relap5 is mainly used for modeling of a current nuclear reactor pipeline system, and the modeling software uses a card type modeling mode and cannot be used for building a higher-grade control system model or a higher-grade mechanical system model such as a PID controller model and a generator model.
Modelica is a modeling language which is popular in the industry at present, has the characteristics of object-oriented property, equation-based property, reusability, layering and the like, provides great convenience for the expression of a nuclear reactor pipeline system model based on the interface expression modes of flow variables and potential variables, and can also be used for building a higher-level assembly model.
Disclosure of Invention
The invention provides a modelestablishment and strong coupling method and a modelestablishment and strong coupling device based on a modelica nuclear reactor pipeline system, which can increase the authenticity of reflecting the complex essential relationship among multiple fields in the nuclear reactor pipeline system by adopting a multi-field unification, data equation and object-oriented modeling mode.
The embodiment of the invention provides a modelica-based nuclear reactor pipeline system model construction and strong coupling method, which comprises the following steps:
decomposing a nuclear reactor piping system into different subsystems according to physical quantities transferred by the system;
building a component model in each subsystem model library based on a modelica language;
converting all the component models into first-order differential algebraic equations;
and solving the first-order differential algebraic equation to complete multi-professional strong coupling simulation of the nuclear reactor loop system.
The second aspect of the embodiments of the present invention provides a modelica-based nuclear reactor pipeline system model building and strong coupling apparatus, including:
the system decomposition module is used for decomposing the nuclear reactor pipeline system into different subsystems according to the physical quantity transmitted by the system;
the component model building module is used for building component models in each subsystem model library based on the modelica language;
the model equation module is used for converting all the component models into first-order differential algebraic equations;
and the strong coupling simulation module is used for solving the first-order differential algebraic equation to complete multi-professional strong coupling simulation of the nuclear reactor loop system.
A third aspect of embodiments of the present invention provides a computer apparatus, which includes a processor and a memory, where the memory stores at least one instruction, at least one program, a set of codes, or a set of instructions, and the at least one instruction, the at least one program, the set of codes, or the set of instructions is loaded and executed by the processor to implement the modelica-based nuclear reactor piping system model building and strong coupling method described in the above aspect.
A fourth aspect of the embodiments of the present invention provides a computer storage medium, where at least one instruction, at least one program, a code set, or a set of instructions is stored in the computer storage medium, and the at least one instruction, the at least one program, the code set, or the set of instructions is loaded and executed by a processor to implement the modelica-based nuclear reactor piping system model building and strong coupling method described in the above aspect.
In the embodiment of the invention, the nuclear reactor pipeline system is decomposed into different subsystems according to different professional levels, the subsystems are modeled, and then the models are processed in a data equation mode, so that unified modeling and strong coupling among multi-field system models in the pipeline system are realized, and the authenticity of reflecting the complex multi-field essential relationship in the nuclear reactor pipeline system is increased.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a modelica-based nuclear reactor pipeline system modeling and strong coupling method according to an embodiment of the present invention;
FIG. 2 is an exploded schematic view of a nuclear reactor piping system provided by an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a modelica-based nuclear reactor pipeline system modeling and strong coupling device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a computer device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "including" and "having," and any variations thereof, in the description and claims of this invention and the above-described drawings are intended to cover a non-exclusive inclusion, and the terms "first" and "second" are used for distinguishing designations only and do not denote any order or magnitude of a number. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The modelica-based nuclear reactor pipeline system model building and strong coupling method provided by the embodiment of the invention can be applied to an application scene of nuclear reactor pipeline system model building and strong coupling.
In the embodiment of the invention, the modelica-based nuclear reactor pipeline system model construction and strong coupling method can be applied to computer equipment, and the computer equipment can be a computer and other terminal equipment with computing and processing capabilities.
As shown in fig. 1, the method for constructing and strongly coupling based on the modelica nuclear reactor pipe system model at least includes the following steps:
s101, decomposing the nuclear reactor pipeline system into different subsystems according to the physical quantity transmitted by the system.
In a preferred implementation, the apparatus may split the nuclear reactor piping system into several subsystems as shown in FIG. 2, including a fluid subsystem, a mechanical subsystem, and a control subsystem, according to the physical quantities transferred by the system. The fluid subsystem can be various system models related to fluid calculation, the mechanical subsystem can be various system models related to mechanical transmission calculation, and the control subsystem can be various system models related to model signal transmission. Specifically, in the fluid subsystem, each component transmits physical quantities such as pressure, temperature and the like, so that fluid calculation is facilitated; in the mechanical subsystem, each component transmits physical quantities such as torque, angular speed and the like, so that mechanical transmission calculation is facilitated; in the control subsystem, control signals are passed between components.
In one implementation, the components of the piping, manostat, valves, pumps, etc. belong to the fluid subsystem; the components of the generator, the control motor and the like belong to a mechanical subsystem; the components such as a PID controller, a filter and the like belong to a control subsystem.
And S102, building component models in each subsystem model library based on the modelica language.
It is understood that the component models in the subsystem model library may be the smallest unit models corresponding to different subsystems, for example, the model library of the fluid subsystem may include components such as pipes, regulators, valves, pumps, etc.; the mechanical subsystem model library can comprise components such as a generator and a control motor; the control subsystem model library may include components such as PID controllers, filters, and the like.
It should be noted that each subsystem model library has a data interface for transmitting data with component models in other subsystem model libraries, and the data interface ensures that different subsystems have the capability of modeling on the same platform.
And S103, converting all the component models into first-order differential algebraic equations.
In specific implementation, the device can utilize a Modelica tool to perform unified analysis on the component models and uniformly convert the component models into a first-order differential algebraic equation. For example, in an object motion equation system, a high-order differential equation system may be obtained first, then the high-order differential equation system is converted into a first-order system with a time derivative, then a pure algebraic first-order augmented equation system is obtained and solved by using an existing solver, and a corresponding equation conversion process is as follows:
where s is the distance of movement, t is time, v is velocity, a is acceleration, F is the force applied to the object, and the superscript represents the time derivative term of some physical quantity, e.g.
Is the time derivative of the distance, equal to the velocity v.
And S104, solving the first-order differential algebraic equation to complete multi-professional strong coupling simulation of the nuclear reactor loop system.
In specific implementation, the equipment can solve the first-order differential algebraic equation by using a differential equation and an algebraic equation solver to complete multi-professional strong coupling simulation of the nuclear reactor loop system. It can be understood that, because the first-order differential algebraic equation system for solving after conversion contains variables of each subsystem component model, multiple subsystems can be solved in a unified equation, and multi-specialty strong coupling is realized.
It should be noted that the solving process of the first order differential equation is well established in the prior art, is not the protection focus of the present application, and is not described in detail herein.
In the embodiment of the invention, the nuclear reactor pipeline system is decomposed into different subsystems according to different professional levels, the subsystems are modeled, and then the models are processed in a data equation mode, so that unified modeling and strong coupling among multi-field system models in the pipeline system are realized, and the authenticity of reflecting the complex multi-field essential relationship in the nuclear reactor pipeline system is increased.
Example 2
The modelled and strong-coupling device for a nuclear reactor pipeline system according to an embodiment of the present invention will be described in detail with reference to fig. 3. It should be noted that, the modelica-based nuclear reactor piping system model building and strong coupling apparatus shown in fig. 3 is used for executing the method of the embodiment of the present invention shown in fig. 1, and for convenience of description, only the portion related to the embodiment of the present invention is shown, and details of the specific technology are not disclosed, please refer to the embodiment of the present invention shown in fig. 1.
Referring to fig. 3, a schematic structural diagram of a modelica-based nuclear reactor pipeline system building and strong coupling device is provided for an embodiment of the present invention. As shown in fig. 3, the model building and strong coupling apparatus 10 according to the embodiment of the present invention may include: the system comprises a system decomposition module 101, a component model building module 102, a model equation module 103 and a strong coupling simulation module 104.
The system decomposition module 101 is configured to decompose a nuclear reactor piping system into different subsystems according to physical quantities transmitted by the system.
And the component model building module 102 is used for building the component models in each subsystem model library based on the modelica language.
And the model equation module 103 is used for converting all the component models into first-order differential algebraic equations, wherein the first-order differential algebraic equations comprise model variables of the component models of the subsystems.
And the strong coupling simulation module 104 is used for solving a first-order differential algebraic equation to complete multi-professional strong coupling simulation of the nuclear reactor loop system.
In specific implementation, each subsystem model library is provided with a data interface for transmitting data with a component model in any subsystem model library.
The subsystems include at least a fluid subsystem, a mechanical subsystem, and a control subsystem.
The fluid subsystem is each system model related to fluid calculation, the mechanical subsystem is each system model related to mechanical transmission calculation, and the control subsystem is each system model related to model signal transmission.
It should be noted that, the execution process of each module in this embodiment may refer to the description in the foregoing method embodiment, and is not described herein again.
In the embodiment of the invention, the nuclear reactor pipeline system is decomposed into different subsystems according to different professional levels, the subsystems are modeled, and then the models are processed in a data equation mode, so that unified modeling and strong coupling among multi-field system models in the pipeline system are realized, and the authenticity of reflecting the complex multi-field essential relationship in the nuclear reactor pipeline system is increased.
Example 3
An embodiment of the present invention provides a computer storage medium, where the computer storage medium may store a plurality of instructions, where the instructions are suitable for being loaded by a processor and executing the method steps in the embodiment shown in fig. 1, and a specific execution process may refer to a specific description of the embodiment shown in fig. 1, which is not described herein again.
Example 4
The embodiment of the application provides computer equipment. As shown in fig. 4, the computer device 20 may include: the at least one processor 201, e.g., CPU, the at least one network interface 204, the user interface 203, the memory 205, the at least one communication bus 202, and optionally, a display 206. Wherein a communication bus 202 is used to enable the connection communication between these components. The user interface 203 may include a touch screen, a keyboard or a mouse, among others. The network interface 204 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface), and a communication connection may be established with the server via the network interface 204. The memory 205 may be a high-speed RAM memory or a non-volatile memory (non-volatile memory), such as at least one disk memory, and the memory 205 includes a flash memory according to an embodiment of the present invention. The memory 205 may optionally be at least one memory system located remotely from the processor 201. As shown in fig. 4, memory 205, which is a type of computer storage medium, may include an operating system, a network communication module, a user interface module, and program instructions.
It should be noted that the network interface 204 may be connected to a receiver, a transmitter or other communication module, and the other communication module may include, but is not limited to, a WiFi module, a bluetooth module, etc., and it is understood that the computer device in the embodiment of the present invention may also include a receiver, a transmitter, other communication module, etc.
decomposing a nuclear reactor pipeline system into different subsystems according to different professional levels;
building a component model in each subsystem model library based on a modelica language;
converting all the component models into first-order differential algebraic equations;
and solving the first-order differential algebraic equation to complete multi-professional strong coupling simulation of the nuclear reactor loop system.
In some embodiments, each subsystem model library has a data interface therein for communicating data with the component models in any of the subsystem model libraries.
In some embodiments, the subsystems include at least a fluid subsystem, a mechanical subsystem, and a control subsystem.
In some embodiments, the fluid subsystem is a model of each system involving fluid calculations, the mechanical subsystem is a model of each system involving mechanical transmission calculations, and the control subsystem is a model of each system involving model signal transmission.
In the embodiment of the invention, the nuclear reactor pipeline system is decomposed into different subsystems according to different professional levels, the subsystems are modeled, and then the models are processed in a data equation mode, so that unified modeling and strong coupling among multi-field system models in the pipeline system are realized, and the authenticity of reflecting the complex multi-field essential relationship in the nuclear reactor pipeline system is increased.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (4)
1. A modelica-based nuclear reactor pipeline system model building and strong coupling method is characterized by comprising the following steps:
decomposing a nuclear reactor piping system into different subsystems according to physical quantities transferred by the system; the subsystems at least comprise a fluid subsystem, a mechanical subsystem and a control subsystem; the fluid subsystem is each system model related to fluid calculation, the mechanical subsystem is each system model related to mechanical transmission calculation, and the control subsystem is each system model related to model signal transmission;
building a component model in each subsystem model library based on a modelica language;
converting all the component models into first-order differential algebraic equations;
solving the first-order differential algebraic equation to complete multi-professional strong coupling simulation of the nuclear reactor pipeline system;
each subsystem model base is provided with a data interface for transmitting data with the component model in any subsystem model base;
the fluid subsystem is a model of each system related to fluid calculation, the mechanical subsystem is a model of each system related to mechanical transmission calculation, and the control subsystem is a model of each system related to model signal transmission; specifically, in the fluid subsystem, each component transmits physical quantities of pressure and temperature, so that fluid calculation is facilitated; in the mechanical subsystem, each component transmits physical quantities of torque and angular speed, so that mechanical transmission calculation is facilitated; in the control subsystem, control signals are transmitted among the components;
the fluid subsystem comprises a pipeline, a pressure stabilizer, a valve and a pump assembly; the mechanical subsystem comprises a generator and a control motor assembly; the control subsystem comprises a PID controller and a filter component;
the equation transformation process is as follows:
where s is the distance of movement, t is time, v is velocity, a is acceleration, F is the force applied to the object, and the superscript represents the time derivative term of some physical quantity, e.g.
Is the time derivative of the distance, equal to the velocity v.
2. A modelica-based nuclear reactor pipeline system model building and strong coupling device is characterized by comprising:
the system decomposition module is used for decomposing the nuclear reactor pipeline system into different subsystems according to the physical quantity transmitted by the system; the subsystems at least comprise a fluid subsystem, a mechanical subsystem and a control subsystem; the fluid subsystem is each system model related to fluid calculation, the mechanical subsystem is each system model related to mechanical transmission calculation, and the control subsystem is each system model related to model signal transmission;
the component model building module is used for building component models in each subsystem model library based on modelica language;
the model equation module is used for converting all the component models into first-order differential algebraic equations;
the strong coupling simulation module is used for solving the first-order differential algebraic equation to complete multi-professional strong coupling simulation of the nuclear reactor pipeline system;
each subsystem model base is provided with a data interface for transmitting data with the component model in any subsystem model base;
the fluid subsystem is a model of each system related to fluid calculation, the mechanical subsystem is a model of each system related to mechanical transmission calculation, and the control subsystem is a model of each system related to model signal transmission; specifically, in the fluid subsystem, each component transmits physical quantities of pressure and temperature, so that fluid calculation is facilitated; in the mechanical subsystem, each component transmits physical quantities of torque and angular speed, so that mechanical transmission calculation is facilitated; in the control subsystem, control signals are transmitted among the components;
the fluid subsystem comprises a pipeline, a pressure stabilizer, a valve and a pump assembly; the mechanical subsystem comprises a generator and a control motor assembly; the control subsystem comprises a PID controller and a filter component;
the equation transformation process is as follows:
where s is the distance of movement, t is time, v is velocity, a is acceleration, F is the force applied to the object, and the superscript represents the time derivative term of some physical quantity, e.g.
Is the time derivative of the distance, equal to the velocity v.
3. A computer device comprising a processor and a memory, the memory having stored therein at least one instruction, at least one program, a set of codes, or a set of instructions, the at least one instruction, the at least one program, the set of codes, or the set of instructions being loaded and executed by the processor to implement the modelica-based nuclear reactor piping system model building and strong coupling method of claim 1.
4. A computer readable storage medium having stored therein at least one instruction, at least one program, a set of codes, or a set of instructions, which is loaded and executed by a processor to implement the modelica-based nuclear reactor piping system model building and strong coupling method of claim 1.
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