An electrical transient simulation analysis system and construction method thereof

Abstract

The present invention discloses an electrical transient simulation analysis system and a construction method thereof, the system comprising: an underlying model prototype module, used to obtain an underlying model prototype reflecting the overall electrical conditions of a nuclear power plant, and establish different transient analysis models for operating conditions; a transient analysis environment configuration module, used to initialize the input and output of the transient analysis model for the operating conditions, obtain a target file whose output signal is a time series and store it in a local database; a background management module, used to set account types and operation functions with different permissions for different users; define operation functions according to the operation layer and set a unified log audit management function; a user interface module, used to display various functions in the background management module, and perform electrical transient operating condition analysis of a nuclear power plant through an interactive model overview and a simulation interface with real-time feedback. The present invention has the advantages of high reliability of analysis results, simple operation, low use cost, easy data management and good confidentiality.

Description

Technical Field

[0001] The present invention relates to the technical field of operating systems, and in particular to an electrical transient simulation analysis system and a construction method thereof. Background Art

[0002] At present, in nuclear power projects, the main software used for transient simulation analysis is ETAP power system analysis software, which has many advantages such as intelligent modeling, multi-dimensional data management mode, multiple input expressions, unified database, virtual reality operation, integrated comprehensive power and physical database, etc., so it is widely used in many fields. However, in the analysis of nuclear power projects, the software also shows its disadvantages, such as: first, when facing the simulation analysis of various power systems, it is necessary to build different underlying models for different systems, and the learning cost is high; second, since ETAP analysis software is not only for the nuclear power field, it will cause many redundant functions in the software itself, making the operation more complicated; third, although the software can model and simulate the equipment and network structure under a wide range and multiple working conditions, these independently running client programs are difficult to customize, embed and automate in actual industrial applications, lacking pertinence. If targeted development is carried out on the basis of the software, the operation is very difficult; fourth, the software will have a large number of system parameter interactions in actual applications, and due to the lack of reasonable management methods, it is easy to cause data leakage or further increase the difficulty of operation. Therefore, how to provide a relatively independent electrical transient simulation and analysis system for nuclear power plants is one of the technical problems that need to be solved urgently in this field. Summary of the invention

[0003] The purpose of the present invention is to provide an electrical transient simulation analysis system and a construction method thereof, so as to solve the problems in the prior art of the electrical transient simulation analysis process of nuclear power plants, which are difficult to operate, low in efficiency, high in cost and poor in applicability due to the lack of an analysis system independently designed for nuclear power plants.

[0004] In order to overcome the above defects in the prior art, the present invention provides an electrical transient simulation analysis system, comprising:

[0005] The bottom model prototype module is used to obtain the bottom model prototype reflecting the overall electrical conditions of the nuclear power plant, and establish different transient analysis models for the bottom model prototype according to different working conditions;

[0006] A transient analysis environment configuration module is used to initialize the input and output of the operating condition transient analysis model, obtain a target file whose output signal is a time series and store it in a local database;

[0007] The backend management module includes a permission management unit, which is used to set account types and operation functions with different permissions for different users; an operation layer management unit, which is used to define operation functions according to the operation layer, and the operation functions are mapping relationships between user behaviors and model selection, parameter setting, model adjustment, simulation calculation, and result saving instructions; a log and report management unit, which is used to set a unified log audit management function;

[0008] The user interface module is used to display the functions in the authority management unit, the operation layer management unit and the log and report management unit, and to analyze the electrical transient conditions of the nuclear power plant through an interactive model overview and a simulation interface with real-time feedback.

[0009] Furthermore, the underlying model prototype includes a nuclear power generator set model, a nuclear power generator set access grid model and a plant power consumption model.

[0010] Furthermore, the nuclear power generator set model, the nuclear power unit grid access model and the plant power model all include nuclear power plant electrical primary equipment and its transient actions, equivalent protection equipment, network structure and necessary equipment parameters.

[0011] Furthermore, the transient analysis environment configuration module is also used to replace the parameters to be modified of the operating transient analysis model with variables to construct an initialization assignment file, control the operating transient analysis model to read the relevant device parameters in the initialization assignment file and set observation points, and output the observed bus signal as a time series file according to the observation point and store it in the local database.

[0012] Furthermore, the Simulink simulation software is used to establish the underlying model prototype module and implement simulation analysis.

[0013] Furthermore, the account types include: hidden accounts for account protection, authorized accounts for creation, modification, deletion and granting, user accounts for simulation settings and operation, and query accounts for querying data.

[0014] Furthermore, various functions in the authority management unit, the operation layer management unit and the log and report management unit are displayed through a flat multi-level menu UI interface.

[0015] The present invention also provides a method for constructing an electrical transient simulation analysis system, comprising:

[0016] Obtaining an underlying model prototype reflecting the overall electrical conditions of the nuclear power plant, and establishing different operating condition transient analysis models for the underlying model prototype according to different operating conditions;

[0017] Initializing the input and output of the transient analysis model of the working condition, obtaining a target file whose output signal is a time series and storing it in a local database;

[0018] Set up background management functions, including setting account types and operation functions with different permissions for different users; define operation functions according to the operation layer, and set up a unified log audit management function; wherein the operation function is the mapping relationship between user behavior and model selection, parameter setting, model adjustment, simulation calculation, and result saving instructions;

[0019] Build a user display interface and perform electrical transient condition analysis of nuclear power plants through an interactive model overview and a simulation interface with real-time feedback.

[0020] The present invention also provides a computer terminal device, comprising:

[0021] one or more processors;

[0022] A memory, coupled to the processor, for storing one or more programs;

[0023] When the one or more programs are executed by the one or more processors, the one or more processors implement the method for constructing the electrical transient simulation analysis system as described above.

[0024] The present invention also provides a computer-readable storage medium on which a computer program is stored. The computer program is executed by a processor to implement the method for constructing the electrical transient simulation analysis system as described above.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] The present invention can realize the electrical transient simulation analysis of nuclear power plants with a relatively simple development process, and the analysis results are derived from the underlying simulation software with high credibility; at the same time, the software is constrained by the upper system user interface and will not have complicated underlying operations. It has the advantages of high credibility of analysis results, simple operation, low use cost, easy data management and good confidentiality performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of an electrical transient simulation analysis system provided by a certain embodiment of the present invention;

[0029] Figure 2 It is a schematic diagram of the connection relationship between various device models in the underlying model provided by an embodiment of the present invention;

[0030] Figure 3 It is a structural schematic diagram of a nuclear power generator set model provided by a certain embodiment of the present invention;

[0031] Figure 4 It is a structural schematic diagram of a model of a nuclear power unit connected to a power grid provided by a certain embodiment of the present invention;

[0032] Figure 5 It is a structural schematic diagram of a plant power model provided by a certain embodiment of the present invention;

[0033] Figure 6 It is a flowchart of a method for constructing an electrical transient simulation analysis system provided by a certain embodiment of the present invention. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be understood that the step numbers used in this document are only for convenience of description and are not intended to limit the order in which the steps are executed.

[0036] It should be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0037] The terms “include” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0038] The term "and / or" means and includes any and all possible combinations of one or more of the associated listed items.

[0039] See also Figure 1 , a certain embodiment of the present invention provides an electrical transient simulation analysis system, comprising:

[0040] The bottom model prototype module 01 is used to obtain the bottom model prototype reflecting the overall electrical conditions of the nuclear power plant, and establish different transient analysis models for the bottom model prototype according to different working conditions;

[0041] In this embodiment, the bottom model prototype is a series of Simulink models corresponding to various transient working conditions, which can be called by Simulink simulation software. The function implementation layer integrates various operation functions according to the needs of on-site work and can start Simulink simulation software. It should be noted that the use of Simulink simulation is only a preferred method of this embodiment. In actual applications, other software can be selected according to needs, such as ETAP and other simulation software to achieve the same effect, and no limitation is made here.

[0042] Furthermore, when creating the underlying model prototype, the electrical model prototype of the nuclear power plant is built in the simulink software according to the electrical structure and equipment parameters of the nuclear power plant; the model reflects the electrical primary equipment of the nuclear power plant and its transient action, equivalent protection equipment, network structure and necessary equipment parameters. The connection relationship between the equipment models in the underlying model is as follows Figure 2 As shown in the figure, the circuit structures of the nuclear power generator model, the nuclear power generator access grid model and the plant power model are as follows: Figure 3-5 The model prototype is modified to generate an accident model corresponding to transient conditions. The accident model includes all devices, parameters and topological structures in the prototype, and is set and reacted to different transient conditions.

[0043] Furthermore, the transient conditions include the following 14 types:

[0044] Working condition 1: normal working condition;

[0045] Working condition 2: The main generator operates at full power;

[0046] Working condition 3: Main AC power system switching working condition;

[0047] Condition 4: Simulation model when the main AC power system is switched;

[0048] Working condition 5: The main transformer of the unit or the high-voltage transformer fails, the main protection is activated, and the 220kV circuit breaker, the generator output circuit breaker and the 6.3kV busbar incoming circuit breaker of the normal operation power supply system are tripped at the same time. The power supply automatically switches to the high-voltage standby transformer;

[0049] Working condition 6: The main transformer or high-voltage transformer of the unit fails, the main protection fails to operate, the backup protection operates, and the 220kV circuit breaker, the generator output circuit breaker and the 6.3kV busbar section working power supply line circuit breaker of the normal operation power supply system are tripped at the same time. The power supply automatically switches to the high-voltage backup transformer;

[0050] Working condition 7: 500kV system short circuit fault, circuit breaker failure protection isolation fault. Normal operation power supply system 6.3kV busbar voltage drops, power supply automatically switches to high standby transformer;

[0051] Working condition 8: Full load starting condition of the motor with the largest power on the 6.3kV bus;

[0052] Working condition 9: The largest motor on the 6.3kV bus is shut down and restarted;

[0053] Working condition 10: Generator underexcitation and demagnetization working condition;

[0054] Working condition 11: When the generator loses step or the system oscillates, the center of the out-of-step oscillation is within the generator-transformer group;

[0055] Working condition 12: When the generator loses step or the system oscillates, the center of the out-of-step oscillation is outside the generator-transformer group;

[0056] Operating condition 13: The operating condition when the nuclear power unit participates in the peak load and frequency regulation of the power grid;

[0057] Working condition 14: Custom working condition.

[0058] Furthermore, the transient analysis environment configuration module 02 is used to initialize the input and output of the operating condition transient analysis model, obtain the target file whose output signal is a time series and store it in the local database;

[0059] In this module, in order to facilitate the direct call of the Simulink model in the system user interface, it is necessary to initialize the input / output of each model, replace the parameters that need to be changed with variables in the model, build an initialization assignment file, and the model reads the relevant device parameters from the file, sets the model observation point, outputs the observed bus signal as a time series file, and saves it in the result database;

[0060] Furthermore, the background management module 03 includes: a permission management unit, which is used to set account types and operation functions with different permissions for different users; an operation layer management unit, which is used to define operation functions according to the operation layer, and the operation functions are mapping relationships between user behaviors and model selection, parameter setting, model adjustment, simulation calculation, and result saving instructions; a log and report management unit, which is used to set a unified log audit management function;

[0061] In this module, the purpose is to realize the functions of the transient simulation system and build a corresponding database to store the system functions. Specifically,

[0062] First, in the account management unit, there are four types of accounts, corresponding to different role arrangements. Accounts can be added, deleted, and changed. The root account is a hidden account that protects the account. The grantor user only has the authorizer role and no other identity to prevent the abuse of the grantor account. The permissions of each account are shown in Table 1:

[0063] Table 1 Accounts and corresponding permissions

[0064] serial number User / Account Permissions / Roles 0 Root Authorizer, User, Query 1 Grantor Authorized by 2 User User, Inquirer 3 Inquirer Inquirer

[0065] As shown in Table 1, the authorizer can create, modify and delete user accounts and grant account roles. The user is mainly responsible for providing simulation settings and running functions. The queryer can extract, print and distribute historical data and reports.

[0066] Second, define the operation function in the operation layer management unit to link the user behavior in the user interface with the processes of model selection, parameter setting, model adjustment, simulation calculation, result saving, etc. Some implicit operations such as logging and alarming are also included.

[0067] Third, a unified log audit management function is designed in the log and report management unit to manage and analyze user behaviors and results, and logs can be queried.

[0068] Furthermore, the user interface module 04 is used to display the functions in the authority management unit, the operation layer management unit and the log and report management unit, and to analyze the electrical transient conditions of the nuclear power plant through an interactive model overview and a simulation interface with real-time feedback.

[0069] In this module, it is necessary to build a system user interface, which is a flat multi-level menu style. Through the login option, you can use the account and password to enter the main interface. The main interface is divided into four first-level menu areas, which are responsible for permission management, simulation analysis, log statistics and software settings. The authorization interface includes the operation of the authorizer account. Its logic is that users without Grantor authority are prohibited from entering, and users with Grantor authority can create, change and delete existing accounts. The simulation interface is a flat real-time feedback design. In addition to the start simulation and print function buttons, its main content is divided into two parts, the left side is an interactive model overview that matches the right option, and the right side is the simulation project setting and result output window. The simulation project setting interface is a drop-down selection interface, which is divided into four levels of menus. The first level menu is for simulation condition selection, the second level menu is for model device selection, the third level menu is for selecting model parameters, and the fourth level menu is for modifying them. The statistical report interface is for recording and reporting simulation results and operations. The operation records are presented in the form of logs in this interface, and can be searched and exported to the local computer by users.

[0070] The electrical transient simulation and analysis system provided by the embodiment of the present invention can realize the electrical transient simulation and analysis of nuclear power plants with a relatively simple development process, and the analysis results are derived from the underlying simulation software with high credibility; at the same time, the software is constrained by the upper system user interface and will not have complex underlying operations. It has the advantages of easy use, low training cost, easy data management and good confidentiality.

[0071] See also Figure 6 A certain embodiment of the present invention further provides a method for constructing an electrical transient simulation analysis system, comprising:

[0072] S10, obtaining an underlying model prototype reflecting the overall electrical conditions of the nuclear power plant, and establishing different operating condition transient analysis models for the underlying model prototype according to different operating conditions;

[0073] S20, initializing the input and output of the operating condition transient analysis model, obtaining a target file whose output signal is a time series and storing it in a local database;

[0074] S30, setting background management functions, including setting account types and operation functions with different permissions for different users; defining operation functions according to the operation layer, and setting a unified log audit management function; wherein the operation function is a mapping relationship between user behavior and model selection, parameter setting, model adjustment, simulation calculation, and result saving instructions;

[0075] S40. Build a user display interface and perform electrical transient condition analysis of the nuclear power plant through an interactive model overview and a simulation interface with real-time feedback.

[0076] It can be understood that the electrical transient simulation and analysis system obtained by the construction method provided in this embodiment can realize the electrical transient simulation and analysis of nuclear power plants with a relatively simple development process, and the analysis results are derived from the underlying simulation software with high credibility; at the same time, the software is constrained by the upper-level system user interface and will not have complex underlying operations. It has the advantages of easy use, low training cost, easy data management and good confidentiality.

[0077] A certain embodiment of the present invention further provides a computer terminal device, comprising:

[0078] one or more processors;

[0079] A memory, coupled to the processor, for storing one or more programs;

[0080] When the one or more programs are executed by the one or more processors, the one or more processors implement the method for constructing the electrical transient simulation analysis system as described above.

[0081] The processor is used to control the overall operation of the computer terminal device to complete all or part of the steps of the construction method of the above-mentioned electrical transient simulation analysis system. The memory is used to store various types of data to support the operation of the computer terminal device, and these data may include, for example, instructions for any application or method used to operate on the computer terminal device, and application-related data. The memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, referred to as EPROM), programmable read-only memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0082] The computer terminal device can be implemented by one or more application-specific integrated circuits (Application Specific1n Integrated Circuit, ASC), digital signal processors (Digital Signal Processor, DSP), digital signal processing devices (Digital Signal Processing Device, DSPD), programmable logic devices (Programmable Logic Device, PLD), field programmable gate arrays (Field Programmable Gate Array, FPGA), controllers, microcontrollers, microprocessors or other electronic components, and is used to execute the construction method of the electrical transient simulation and analysis system as described in any of the above embodiments, and achieve the technical effect consistent with the above method.

[0083] A certain embodiment of the present invention further provides a computer-readable storage medium including program instructions, which, when executed by a processor, implements the steps of the method for constructing an electrical transient simulation analysis system as described in any of the above embodiments. For example, the computer-readable storage medium may be the above-mentioned memory including program instructions, and the above-mentioned program instructions may be executed by a processor of a computer terminal device to complete the method for constructing an electrical transient simulation analysis system as described in any of the above embodiments, and achieve the technical effect consistent with the above-mentioned method.

[0084] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. An electrical transient simulation analysis system, characterized in that: include: The bottom model prototype module is used to obtain the bottom model prototype reflecting the overall electrical conditions of the nuclear power plant, and to establish different transient analysis models for the bottom model prototype according to different working conditions; wherein the bottom model prototype is created according to the electrical structure and equipment parameters of the nuclear power plant, and the bottom model prototype is modified to generate a transient analysis model corresponding to the transient working condition, and the transient analysis model includes all devices, parameters and topological structures in the bottom model prototype, and is set and reacted to different transient working conditions; A transient analysis environment configuration module is used to initialize the input and output of the operating transient analysis model, obtain a target file in which the output signal is a time series and store it in a local database; wherein the transient analysis environment configuration module is also used to replace the parameters to be modified of the operating transient analysis model with variables to construct an initialization assignment file, control the operating transient analysis model to read the relevant device parameters in the initialization assignment file and set the observation points, and output the observed bus signal as a time series file according to the observation points and store it in the local database; The backend management module includes a permission management unit, which is used to set account types and operation functions with different permissions for different users; an operation layer management unit, which is used to define operation functions according to the operation layer, and the operation functions are mapping relationships between user behaviors and model selection, parameter setting, model adjustment, simulation calculation, and result saving instructions; a log and report management unit, which is used to set a unified log audit management function; The user interface module is used to display the functions in the authority management unit, the operation layer management unit and the log and report management unit, and to analyze the electrical transient conditions of the nuclear power plant through an interactive model overview and a simulation interface with real-time feedback.

2. The electrical transient simulation analysis system according to claim 1, characterized in that: The underlying model prototype includes a nuclear power generating unit model, a nuclear power unit access grid model and a plant power consumption model.

3. The electrical transient simulation analysis system according to claim 2, characterized in that: The nuclear power generator set model, the nuclear power unit grid access model and the plant power model all include nuclear power plant electrical primary equipment and its transient actions, equivalent protection equipment, network structure and necessary equipment parameters.

4. The electrical transient simulation analysis system according to claim 1, characterized in that: Simulink simulation software is used to establish the underlying model prototype module and implement simulation analysis.

5. The electrical transient simulation analysis system according to claim 1, characterized in that: The account types include: hidden accounts for account protection, authorized accounts for creation, modification, deletion and granting, user accounts for simulation settings and operations, and query accounts for querying data.

6. The electrical transient simulation analysis system according to claim 1, characterized in that: The various functions in the authority management unit, the operation layer management unit and the log and report management unit are displayed through a flat multi-level menu-type UI interface.

7. A method for constructing an electrical transient simulation analysis system, characterized in that: include: Obtaining an underlying model prototype reflecting the overall electrical conditions of the nuclear power plant, and establishing different operating condition transient analysis models for the underlying model prototype according to different operating conditions; wherein the underlying model prototype is created according to the electrical structure and equipment parameters of the nuclear power plant, and the underlying model prototype is modified to generate an operating condition transient analysis model corresponding to the transient operating condition, and the operating condition transient analysis model includes all devices, parameters and topological structures in the underlying model prototype, and is set and reacted to different transient operating conditions; Initialize the input and output of the operating condition transient analysis model, obtain a target file with the output signal as a time series and store it in a local database; and use variables to replace the parameters to be modified of the operating condition transient analysis model to construct an initialization assignment file, control the operating condition transient analysis model to read the relevant device parameters in the initialization assignment file and set the observation point, and output the observed bus signal as a time series file according to the observation point and store it in the local database; Set up background management functions, including setting account types and operation functions with different permissions for different users; define operation functions according to the operation layer, and set up a unified log audit management function; wherein the operation function is the mapping relationship between user behavior and model selection, parameter setting, model adjustment, simulation calculation, and result saving instructions; Build a user display interface and perform electrical transient condition analysis of nuclear power plants through an interactive model overview and a simulation interface with real-time feedback.

8. A computer terminal device, characterized in that: include: one or more processors; A memory, coupled to the processor, for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method for constructing an electrical transient simulation and analysis system as described in claim 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: The computer program is executed by a processor to implement the method for constructing an electrical transient simulation and analysis system as claimed in claim 7.

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