CN114638030B - Thermal hydraulic model correction method and device based on expert knowledge base - Google Patents
Thermal hydraulic model correction method and device based on expert knowledge base Download PDFInfo
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Abstract
The application provides a thermal hydraulic model correction method and device based on an expert knowledge base, computer equipment and a storage medium, and relates to the technical field of nuclear power station simulators. The method comprises the following steps: acquiring operation data of a thermal hydraulic system of a power plant under a set working condition; working condition setting is carried out on a simulation engine thermal hydraulic model according to the set working condition so as to obtain simulation data of the thermal hydraulic model under the set working condition; and correcting the thermal hydraulic model according to the operating data and the simulation data until the difference between the operating data and the simulation data meets a preset condition. Therefore, the correction of the thermal hydraulic model of the full-range simulator is realized, and the support is provided for improving the reliability of the simulation result of the full-range simulator.
Description
Technical Field
The application relates to the technical field of nuclear power station simulators, in particular to a thermal hydraulic model correction method and device based on an expert knowledge base, computer equipment and a storage medium.
Background
The full-range analog machine is key equipment for nuclear power station engineering construction, and is integrated with development and design in various fields of reactor engineering, thermal energy power, electricity, instrument control, computers, digital computation and the like. After the construction of the full-range simulator of the nuclear power plant is completed, the thermodynamic and hydraulic model of the simulator needs to be modified regularly to ensure that the simulation result of the simulator is matched with the real operation result of the nuclear power plant.
At present, a nuclear power plant full-range simulator is usually used for periodically correcting a thermal hydraulic model by a professional thermal engineer according to model debugging experience. The method has high dependence on the experience and level of professional engineers, and increases the difficulty in correcting the thermal hydraulic model.
Disclosure of Invention
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
The embodiment of the first aspect of the present application provides a method for correcting a thermal hydraulic model, including:
acquiring operation data of a thermal hydraulic system of a power plant under a set working condition;
working condition setting is carried out on a simulation engine thermal hydraulic model according to the set working condition so as to obtain simulation data of the thermal hydraulic model under the set working condition;
and correcting the thermal hydraulic model according to the operating data and the simulation data until the difference between the operating data and the simulation data meets a preset condition.
The embodiment of the second aspect of the present application provides a correction device for a thermal hydraulic model, including:
the first acquisition module is used for acquiring the operation data of the thermal hydraulic system of the power plant under the set working condition;
the second acquisition module is used for carrying out working condition setting on the simulated mechanical hydraulic model according to the set working condition so as to acquire the simulation data of the simulated mechanical hydraulic model under the set working condition;
and the correction module is used for correcting the thermal hydraulic model according to the operating data and the simulation data until the difference between the operating data and the simulation data meets a preset condition.
An embodiment of a third aspect of the present application provides a computer device, including: the device comprises a memory, a processor and computer instructions stored on the memory and executable on the processor, wherein the processor executes the instructions to realize the correction method of the thermal hydraulic model according to the embodiment of the first aspect of the application.
A fourth aspect of the present application is directed to a non-transitory computer-readable storage medium storing computer instructions, which when executed by a processor, implement a method for correcting a thermal hydraulic model as set forth in the first aspect of the present application.
An embodiment of a fifth aspect of the present application proposes a computer program product, wherein instructions, when executed by a processor, implement the method for modifying a thermal hydraulic model as proposed in an embodiment of the first aspect of the present application.
The correction method, the correction device, the computer equipment and the storage medium of the thermal hydraulic model have the following beneficial effects:
firstly, acquiring operation data of a thermal hydraulic system of a power plant under a set working condition; then, working condition setting is carried out on the thermodynamic and mechanical hydraulic model of the simulation machine according to the set working condition so as to obtain simulation data of the thermodynamic and mechanical hydraulic model under the set working condition; and finally, correcting the thermal hydraulic model according to the operation data and the simulation data until the difference between the operation data and the simulation data meets the preset condition. Therefore, the correction of the thermal hydraulic model by depending on expert experience is avoided, the correction difficulty of the thermal hydraulic model is reduced, and the timely correction of the thermal hydraulic model is realized.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow chart of a method for correcting a thermal hydraulic model according to an embodiment of the present disclosure;
fig. 2 is a schematic flow chart of a method for correcting a thermal hydraulic model according to another embodiment of the present disclosure;
fig. 3 is a schematic flow chart of a method for correcting a thermal hydraulic model according to another embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a correction apparatus for a thermal hydraulic model according to another embodiment of the present disclosure;
FIG. 5 illustrates a block diagram of an exemplary computer device suitable for use in implementing embodiments of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present application and should not be construed as limiting the present application.
The method, the apparatus, the computer device, and the storage medium for correcting the thermal hydraulic model according to the embodiments of the present application are described below with reference to the drawings.
Fig. 1 is a schematic flow chart of a correction method of a thermal hydraulic model provided in an embodiment of the present application.
The embodiment of the present application exemplifies that the correction method of the thermal hydraulic model is configured in the correction device of the thermal hydraulic model, and the correction device of the thermal hydraulic model can be applied to any computer equipment, so that the computer equipment can execute the correction function of the thermal hydraulic model.
The Computer device may be a Personal Computer (PC), a cloud device, a mobile device, and the like, and the mobile device may be a hardware device having various operating systems, touch screens, and/or display screens, such as a mobile phone, a tablet Computer, a Personal digital assistant, a wearable device, and an in-vehicle device.
As shown in fig. 1, the method for correcting the thermal hydraulic model may include the following steps:
In which a nuclear power plant may be operated in relation to a number of operating conditions. The operating data of the nuclear power plant may also change under different operating conditions. Therefore, the operation data of the thermal hydraulic system of the power plant can be acquired according to the set working condition.
It should be noted that during the operation of the power plant, various operation data are generated and form an industrial data network of the power plant. Therefore, in the embodiment of the application, the operation data corresponding to the thermal hydraulic system can be acquired from the industrial data network of the power plant.
And 102, setting the working condition of the simulated mechanical-thermal hydraulic model according to the set working condition to acquire the simulation data of the thermal-mechanical hydraulic model under the set working condition.
It will be appreciated that prior to operation of the nuclear power plant, corresponding operating condition parameters, such as environmental parameters, initial operating conditions, component conditions, etc., may need to be set. Therefore, when the real operation process of the power plant is simulated through the simulator, the working condition parameters of the simulator can be set according to the working condition parameters of the power plant operation.
In the embodiment of the application, the working condition setting can be performed on the simulation engine thermal hydraulic model according to the set working condition, so that the thermal hydraulic model simulates the actual operation process of the thermal hydraulic system, and corresponding simulation data is generated.
It should be noted that, when the thermal hydraulic system of the power plant is in operation, the generated operation data may include pressure, temperature, flow rate, and the like. The simulation data generated by the thermal hydraulic model and the operation data generated by the thermal hydraulic system are mutually corresponding in quantity and type, and may have differences in numerical values.
And 103, correcting the thermal hydraulic model according to the operation data and the simulation data until the difference between the operation data and the simulation data meets a preset condition.
The operation data is a real operation result of the thermal hydraulic system of the power plant under a set working condition, and the simulation data is a simulation result of the simulation engine thermal hydraulic model under the same working condition. Therefore, the thermal hydraulic model can be corrected according to the difference between the two, so that the simulation result of the thermal hydraulic model is close to or equal to the real operation result.
It should be noted that after the thermal hydraulic model is corrected once according to the operating data and the simulation data, the simulation data of the corrected thermal hydraulic model under the set working condition can be obtained, and the operating data is compared with the corrected simulation data. And if the difference between the two meets the preset condition, finishing the correction of the thermal hydraulic model. And if the difference between the simulation data and the operation data does not meet the preset condition, the thermal hydraulic model needs to be corrected again until the difference between the corrected simulation data and the operation data meets the preset condition.
In the embodiment of the application, firstly, the operation data of the thermal hydraulic system of the power plant under a set working condition is obtained; then, working condition setting is carried out on the simulation engine thermal hydraulic model according to the set working condition so as to obtain simulation data of the thermal hydraulic model under the set working condition; and finally, correcting the thermal hydraulic model according to the operation data and the simulation data until the difference between the operation data and the simulation data meets the preset condition. Therefore, the correction of the thermal hydraulic model by depending on expert experience is avoided, the correction difficulty of the thermal hydraulic model is reduced, and the timely correction of the thermal hydraulic model is realized.
Fig. 2 is a schematic flow chart of a method for correcting a thermal hydraulic model according to another embodiment of the present application. As shown in fig. 2, the method for correcting the thermal hydraulic model may include the following steps:
It should be noted that the actual operating conditions of the nuclear power plant may include a steady-state operating condition and a transient operating condition, and the data characteristics are different under different operating conditions. For example, the steady state condition data is presented in the form of a single point, and the transient condition data is presented in the form of time series data.
Therefore, in order to ensure that the simulation results of the thermal hydraulic model under the steady-state working condition and the transient working condition can both accord with the actual operation results, the operation data of the thermal hydraulic system under the steady-state working condition and the transient working condition can be respectively obtained, so that the thermal hydraulic model can be corrected according to the operation data under different working conditions.
Wherein, the concrete implementation process of obtaining the operating data of power plant's thermal technology hydraulic system under steady state operating mode and transient state operating mode can refer to the detailed description of this application other embodiments, and is no longer repeated here.
It can be understood that, in the case that the set operating conditions include a steady-state operating condition and a transient operating condition, the simulation data of the thermal hydraulic model under the steady-state operating condition and the simulation data under the transient operating condition can be obtained respectively.
The specific implementation process of obtaining the simulation data of the thermal hydraulic model under the steady-state working condition and the simulation data under the transient working condition can refer to the detailed description of other embodiments of the present application, and is not repeated here.
And 203, correcting the thermal hydraulic model according to the operation data and the simulation data under the steady-state working condition until the difference between the operation data and the simulation data under the steady-state working condition meets a first preset condition.
It should be noted that the operation data and the simulation data under the steady-state condition are presented in a single-point form. Therefore, the thermal hydraulic model can be corrected according to the error between the operation data and the simulation data under the steady-state working condition.
For example, the first preset condition may be an error threshold of the operation data and the simulation data. And when the error between the operation data and the simulation data is smaller than a threshold value, finishing the correction of the thermal hydraulic model. When the error between the operation data and the simulation data is greater than or equal to the threshold value, the thermal hydraulic model needs to be corrected again until the error between the simulation data and the operation data is less than the threshold value.
And 204, correcting the thermal hydraulic model according to the operation data and the simulation data under the transient working condition until the difference between the operation data and the simulation data under the transient working condition meets a second preset condition.
It should be noted that the operation data and the simulation data under the transient operating condition are presented in the form of time series data. Therefore, the thermal hydraulic model can be corrected according to the trend characteristics of the operation data and the simulation data under the transient working condition.
For example, the second preset condition may be a variation trend of the operation data and the simulation data. And when the variation trend of the operation data is the same as that of the simulation data, the correction of the thermal hydraulic model is completed. When the variation trend of the operation data is different from that of the simulation data, the thermal hydraulic model needs to be corrected again until the variation trend of the simulation data is the same as that of the operation data.
In the embodiment of the application, the operation working conditions of the thermal hydraulic model are distinguished, and the thermal hydraulic model is corrected according to the steady-state working condition and the transient working condition, so that the correction precision and accuracy of the thermal hydraulic model are effectively improved.
Fig. 3 is a schematic flow chart of a method for correcting a thermal hydraulic model according to another embodiment of the present application. As shown in fig. 3, the method for correcting the thermal hydraulic model may include the following steps:
301, acquiring operation data of the thermal hydraulic system of the power plant under various working conditions and simulation data of the simulation mechanical hydraulic model under corresponding working conditions.
It is understood that during operation of the power plant, various operating conditions may be involved, such as steady state operating conditions, transient operating conditions, and the like. The operating data of the nuclear power plant may also change under different operating conditions. Correspondingly, the simulation data of the simulation mechanical thermal hydraulic model are different.
Therefore, in order to establish an expert knowledge base for correcting the thermal hydraulic model so as to correct the thermal hydraulic model by using the expert knowledge base, the operating data of the thermal hydraulic system under various working conditions and the simulation data of the simulation mechanical thermal hydraulic model under the corresponding working conditions can be acquired based on the historical operating data of the power plant.
And 302, performing error analysis on the operation data and the simulation data under each working condition to determine a model parameter correction scheme of the thermal hydraulic model.
The method comprises the steps of establishing a fault tree based on power plant design data, power plant operation data, model simulation data and priori knowledge of model establishment and debugging, and then determining a model parameter correction scheme of a thermal hydraulic model under each working condition by using a fault tree analysis method and a production expression method.
It should be noted that the thermal hydraulic model may comprise a plurality of subsystems, such as a water supply system, a steam discharge system, etc., each of which may be related to a plurality of parameters, such as temperature, pressure, etc. Therefore, the corresponding subsystem, and the parameters and values to be corrected in the subsystem can be determined according to the errors of different parameters in the operation data and the simulation data.
The expert knowledge base comprises operation data, simulation data and corresponding model parameter correction schemes under various working conditions, and therefore reference basis can be provided for correction of the thermal hydraulic model during operation of the power plant.
And 304, acquiring the operation data of the thermal hydraulic system of the power plant under the set working condition.
And 305, setting the working condition of the simulated mechanical hydraulic model according to the set working condition to acquire the simulation data of the simulated mechanical hydraulic model under the set working condition.
The specific implementation manner of steps 304-305 may refer to the detailed description of other embodiments in the present application, and is not described herein again.
And step 306, inputting the operation data, the simulation data and the model parameters of the thermal hydraulic model into an expert knowledge base, so that the expert knowledge base determines a model parameter set to be modified of the thermal hydraulic model according to the difference between the operation data and the simulation data.
Specifically, after the operating data, the simulation data and the corresponding thermal hydraulic model parameters under the set working condition are input into the expert knowledge base, the expert knowledge base can compare the operating data with the simulation data to determine the difference between the operating data and the simulation data. And further matching the difference between the two parameters with knowledge in a knowledge base to determine the subsystem to be corrected, the parameters to be corrected and specific numerical values in the subsystem.
It should be noted that the actual operating conditions of the nuclear power plant may include a steady-state operating condition and a transient operating condition, and the data characteristics are different under different operating conditions. For steady state operating data and simulated data, errors can be used to characterize the difference between the two. For transient operating data and simulated data, the variation trend can be used to characterize the difference between the two. For a specific implementation, reference may be made to the detailed description of other embodiments of the present application, which is not described herein again.
It should be noted that, when the difference between the operation data and the simulation data input into the expert knowledge base satisfies the preset condition, the thermal hydraulic model does not need to be corrected. When the difference between the operation data and the simulation data input into the expert knowledge base does not meet the preset condition, the parameter set to be modified output by the expert knowledge base can comprise one or more model modification parameters.
The type of the model modification parameter may include an initial value, an attribute value, and a modification coefficient. The initial values may include, among other things, pressure, temperature, enthalpy, valve position parameters, etc. The property values may include valve characteristics, pump characteristics, and the like. The correction coefficients may include pressure correction coefficients, resistance correction coefficients, temperature correction coefficients, power correction coefficients, and the like.
In addition, the model modification parameters may include the subsystem to which the parameter belongs in the thermohydraulic model, the specific node of the parameter in the subsystem, and the parameter specific value.
It should be noted that after the thermal hydraulic model is corrected according to the model correction parameters, the simulation data of the corrected thermal hydraulic model under the set working condition can be acquired, and the operation data is compared with the corrected simulation data. And if the difference between the two meets the preset condition, finishing the correction of the thermal hydraulic model. And if the difference between the simulation data and the operation data does not meet the preset condition, the thermal hydraulic model needs to be corrected again until the difference between the corrected simulation data and the operation data meets the preset condition.
For example, when the nuclear power plant is reduced from 100% full power to 50%, the thermal hydraulic model needs to be modified to match the turbine power to the power of the nuclear power plant. Therefore, the operation data and the simulation data in the power reduction process can be respectively imported into an expert knowledge base, the expert knowledge base determines that the numerical values and the variation trends of main parameters such as the pressure of the pressurizer, the average temperature of a primary loop, the main feedwater flow, the liquid level of the main steam flow pressurizer, the liquid level of the steam generator and the like are within the error allowable range by comparing the operation data with the simulation data, and the deviation between the steam turbine power and the operation data in the simulation data is 12% and exceeds the preset allowable error by 10%.
Furthermore, the model correction parameter output by the expert knowledge base is that the turbine power correction coefficient is modified from 10 to 8. And after the thermal hydraulic model is automatically corrected according to the model correction parameters output by the expert knowledge base, updated simulation data can be obtained. And automatically adding the updated simulation data into an expert knowledge base, wherein the expert knowledge base compares the running data with the updated simulation data, so that errors among all parameters meet preset conditions, and the model does not need to be corrected. And finishing the correction of the thermal hydraulic model.
It should be noted that, in some embodiments, when the thermal hydraulic model needs to be corrected, there may be a plurality of model parameter sets to be corrected output by the expert knowledge base. Wherein, each model parameter set to be modified corresponds to a modification scheme. Furthermore, the thermal hydraulic model can be corrected by sequentially adopting a model parameter set to be corrected. And finishing the correction if the corrected thermal hydraulic model meets the requirements. Otherwise, the thermal hydraulic model is corrected by adopting the next model parameter set to be corrected.
In the embodiment of the application, the knowledge base system is established according to the operation data of the thermal hydraulic system of the power plant under various working conditions, the simulation data of the simulated mechanical hydraulic model under corresponding working conditions and the parameter correction scheme corresponding to each working condition, so that the thermal hydraulic model is corrected based on the operation data of the power plant and the knowledge base system, the correction efficiency of the thermal hydraulic model is further improved, and the correction difficulty of the thermal hydraulic model is reduced.
In order to realize the embodiment, the application also provides a correction device of the thermal hydraulic model.
Fig. 4 is a schematic structural diagram of a correction device for a thermal hydraulic model according to an embodiment of the present application.
As shown in fig. 4, the correction apparatus 100 for the thermal hydraulic model may include: a first obtaining module 110, a second obtaining module 120 and a modifying module 130.
The first obtaining module 110 is configured to obtain operation data of the thermal hydraulic system of the power plant under a set working condition;
the second obtaining module 120 is configured to perform working condition setting on the simulated thermodynamic and mechanical hydraulic model according to a set working condition, so as to obtain simulation data of the thermodynamic and mechanical hydraulic model under the set working condition;
and the correcting module 130 is configured to correct the thermal hydraulic model according to the operating data and the simulation data until a difference between the operating data and the simulation data satisfies a preset condition.
In a possible implementation manner of the embodiment of the present application, the modifying module 130 may include:
the first determining unit is used for determining a model parameter set to be modified of the thermal hydraulic model according to the difference between the operation data and the simulation data;
the correction unit is used for responding to the condition that the parameter set of the model to be modified comprises more than one model correction parameter, and correcting the thermal hydraulic model according to the model correction parameter, wherein the type of the model correction parameter comprises but is not limited to: initial values, attribute values and correction coefficients.
In a possible implementation manner of the embodiment of the present application, the first determining unit is specifically configured to:
and inputting the operating data, the simulation data and the model parameters of the thermal hydraulic model into an expert knowledge base so that the expert knowledge base determines a model parameter set to be modified of the thermal hydraulic model according to the difference between the operating data and the simulation data.
In a possible implementation manner of the embodiment of the present application, the modification module 130 may further include:
the acquisition unit is used for acquiring the operating data of the thermal hydraulic system of the power plant under various working conditions and the simulation data of the simulation mechanotechnical hydraulic model under the corresponding working conditions;
the second determining unit is used for carrying out error analysis on the operating data and the simulation data under each working condition so as to determine a model parameter correction scheme of the thermal hydraulic model;
and the generating unit is used for establishing a mapping relation for the operating data, the simulation data and the model parameter correction scheme under each working condition so as to generate an expert knowledge base.
In a possible implementation manner of the embodiment of the present application, the set operating condition includes a steady-state operating condition and a transient operating condition, and the correcting module 130 may include:
the first correction unit is used for correcting the thermal hydraulic model according to the operation data and the simulation data under the steady-state working condition until the difference between the operation data and the simulation data under the steady-state working condition meets a first preset condition;
and the second correction unit is used for correcting the thermal hydraulic model according to the operation data and the simulation data under the transient working condition until the difference between the operation data and the simulation data under the transient working condition meets a second preset condition.
The functions and specific implementation principles of the modules in the embodiments of the present application may refer to the embodiments of the methods, which are not described herein again.
The correction device of the thermal hydraulic model of the embodiment of the application firstly obtains the operation data of the thermal hydraulic system of the power plant under the set working condition; then, working condition setting is carried out on the thermodynamic and mechanical hydraulic model of the simulation machine according to the set working condition so as to obtain simulation data of the thermodynamic and mechanical hydraulic model under the set working condition; and finally, correcting the thermal hydraulic model according to the operation data and the simulation data until the difference between the operation data and the simulation data meets the preset condition. Therefore, the correction of the thermal hydraulic model by depending on expert experience is avoided, the correction difficulty of the thermal hydraulic model is reduced, and the timely correction of the thermal hydraulic model is realized.
In order to implement the foregoing embodiments, the present application also provides a computer device, including: the device comprises a memory, a processor and computer instructions stored on the memory and capable of running on the processor, wherein when the processor executes the instructions, the method for correcting the thermal hydraulic model provided by the previous embodiment of the application is realized.
In order to achieve the above embodiments, the present application further proposes a non-transitory computer readable storage medium storing computer instructions, which when executed by a processor, implement the correction method of the thermal hydraulic model as proposed in the previous embodiments of the present application.
In order to implement the foregoing embodiments, the present application further proposes a computer program product, which when executed by an instruction processor in the computer program product, executes the correction method of the thermal hydraulic model proposed in the foregoing embodiments of the present application.
FIG. 5 illustrates a block diagram of an exemplary computer device suitable for use in implementing embodiments of the present application. The computer device 12 shown in fig. 5 is only an example and should not bring any limitation to the function and scope of use of the embodiments of the present application.
As shown in FIG. 5, computer device 12 is in the form of a general purpose computing device. The components of computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that couples various system components including the system memory 28 and the processing unit 16.
A program/utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. Program modules 42 generally carry out the functions and/or methodologies of the embodiments described herein.
The processing unit 16 executes various functional applications and data processing, for example, implementing the methods mentioned in the foregoing embodiments, by executing programs stored in the system memory 28.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
The logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware that is related to instructions of a program, and the program may be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (4)
1. A correction method of a thermal hydraulic model is characterized by comprising the following steps:
acquiring operation data of a thermal hydraulic system of a power plant under a set working condition;
working condition setting is carried out on a simulation engine thermal hydraulic model according to the set working condition so as to obtain simulation data of the thermal hydraulic model under the set working condition;
correcting the thermal hydraulic model according to the operating data and the simulation data until the difference between the operating data and the simulation data meets a preset condition;
the correction of the thermal hydraulic model according to the operation data and the simulation data comprises the following steps:
inputting the operating data, the simulation data and the model parameters of the thermal hydraulic model into an expert knowledge base so that the expert knowledge base determines a model parameter set to be modified of the thermal hydraulic model according to the difference between the operating data and the simulation data;
in response to the parameter set to be modified comprises more than one model modification parameter, modifying the thermohydraulic model according to the model modification parameter, wherein the types of the model modification parameter include but are not limited to: an initial value, an attribute value and a correction coefficient;
the determining a model parameter set to be modified of the thermal hydraulic model according to the difference between the operating data and the simulation data comprises:
inputting the operation data, the simulation data and the model parameters of the thermal hydraulic model into an expert knowledge base so that the expert knowledge base determines a model parameter set to be modified of the thermal hydraulic model according to the difference between the operation data and the simulation data, wherein after the operation data, the simulation data and the corresponding thermal hydraulic model parameters under the set working condition are input into the expert knowledge base, the expert knowledge base compares the operation data with the simulation data to determine the difference between the operation data and the simulation data, and matches the difference between the operation data and the simulation data with knowledge in the knowledge base to determine a subsystem to be modified, and the parameters to be modified and specific numerical values in the subsystem;
before the determining a model parameter set to be modified of the thermal hydraulic model according to the difference between the operating data and the simulation data, the method further includes:
acquiring operation data of a thermal hydraulic system of a power plant under various working conditions and simulation data of a thermal hydraulic model of a simulation machine under corresponding working conditions;
performing error analysis on the operating data and the simulation data under each working condition to determine a model parameter correction scheme of the thermal hydraulic model, wherein a fault tree is established based on power plant design data, the power plant operating data, the model simulation data and priori knowledge of model establishment and debugging, and the model parameter correction scheme of the thermal hydraulic model under each working condition is determined by using a fault tree analysis method and a production expression method;
establishing a mapping relation for the operating data, the simulation data and the model parameter correction scheme under each working condition to generate an expert knowledge base;
the set working conditions comprise a steady state working condition and a transient state working condition, the thermotechnical hydraulic model is corrected according to the operation data and the simulation data until the difference between the operation data and the simulation data meets a preset condition, and the method comprises the following steps:
correcting the thermal hydraulic model according to the operating data and the simulation data under the steady-state working condition until the difference between the operating data and the simulation data under the steady-state working condition meets a first preset condition, wherein the operating data and the simulation data under the steady-state working condition are presented in a single-point form, and the first preset condition is an error threshold of the operating data and the simulation data;
and correcting the thermal hydraulic model according to the operating data and the simulation data under the transient working condition until the difference between the operating data and the simulation data under the transient working condition meets a second preset condition, wherein the operating data and the simulation data under the transient working condition are presented in the form of time series data, and the second preset condition is the variation trend of the operating data and the simulation data.
2. A correction device for a thermal hydraulic model is characterized by comprising:
the first acquisition module is used for acquiring the operation data of the thermal hydraulic system of the power plant under the set working condition;
the second acquisition module is used for carrying out working condition setting on a thermodynamic and thermodynamic model of the simulation machine according to the set working condition so as to acquire simulation data of the thermodynamic and thermodynamic model under the set working condition;
the correction module is used for correcting the thermal hydraulic model according to the operation data and the simulation data until the difference between the operation data and the simulation data meets a preset condition;
the correction module comprises:
a first determining unit, configured to determine a model parameter set to be modified of the thermal hydraulic model according to a difference between the operating data and the simulation data, where after the operating data, the simulation data, and corresponding thermal hydraulic model parameters under a set operating condition are input into the expert knowledge base, the expert knowledge base compares the operating data with the simulation data to determine a difference therebetween, and matches the difference with knowledge in the knowledge base to determine a subsystem to be modified, and the parameters to be modified and specific numerical values in the subsystem;
a modification unit, configured to modify the thermal hydraulic model according to one or more model modification parameters in response to the to-be-modified model parameter set including the model modification parameters, where the types of the model modification parameters include but are not limited to: an initial value, an attribute value and a correction coefficient;
the first determination unit is configured to:
inputting the operating data, the simulation data and the model parameters of the thermal hydraulic model into an expert knowledge base so that the expert knowledge base determines a model parameter set to be modified of the thermal hydraulic model according to the difference between the operating data and the simulation data;
the correction module further comprises:
the acquisition unit is used for acquiring the operating data of the thermal hydraulic system of the power plant under various working conditions and the simulation data of the simulation mechanical hydraulic model under the corresponding working conditions;
a second determining unit, configured to perform error analysis on the operating data and the simulation data under each operating condition to determine a model parameter modification scheme of the thermal hydraulic model, where a fault tree is established based on power plant design data, the power plant operating data, the model simulation data, and prior knowledge of model establishment and debugging, and a model parameter modification scheme of the thermal hydraulic model under each operating condition is determined by using a fault tree analysis method and a production expression method;
the generating unit is used for establishing a mapping relation among the operating data, the simulation data and the model parameter correction scheme under each working condition so as to generate an expert knowledge base;
the set operating conditions include steady-state operating conditions and transient operating conditions, and the correction module includes:
the first correction unit is used for correcting the thermal hydraulic model according to the operating data and the simulation data under the steady-state working condition until the difference between the operating data and the simulation data under the steady-state working condition meets a first preset condition, wherein the operating data and the simulation data under the steady-state working condition are presented in a single-point form, and the first preset condition is an error threshold value of the operating data and the simulation data;
and the second correction unit is used for correcting the thermal hydraulic model according to the operating data and the simulation data under the transient working condition until the difference between the operating data and the simulation data under the transient working condition meets a second preset condition, wherein the operating data and the simulation data under the transient working condition are presented in the form of time series data, and the second preset condition is the change trend of the operating data and the simulation data.
3. A computer device comprising a memory, a processor, and computer instructions stored on the memory and executable on the processor, wherein the processor executes the instructions to implement the method for correcting a thermohydraulic model according to claim 1.
4. A computer-readable storage medium storing computer instructions, wherein the computer instructions, when executed by a processor, implement the method for modifying a thermal-hydraulic model according to claim 1.
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