Simulation System and Method for Real-Time Tracking of Power Plant Status Based on Power Plant Field Values

Abstract

The present invention relates to a simulation system that simulates the behavior of a power plant, and is characterized in that it collects all field values ​​within the power plant at a time point n, simulates the behavior of the power plant at the time point n based on the field values ​​that converge through numerical analysis of the power plant model, provides the field values ​​obtained through the numerical analysis of the power plant model as second initial conditions, and determines a simulation calculation method depending on the comparison result between the power plant field values ​​and the simulation calculation values.

Description

Technical Field

[0001] The present invention relates to a simulation system for simulating the behavior of a power plant.

Background Art

[0002] Power plant simulators have been mainly developed and utilized for training operating personnel mainly after the construction of power plants for stable operation of power plants. Recently, before applying a digital control system of a power plant to the site, control logic tests, HMI tests, improvement tests of existing control logic, etc. are performed in advance to be used as a test bed for reducing trial and error at the site.

[0003] Here, the variable value etc. means the value of the sensor signal measured by a plurality of sensors provided in the power plant equipment, and the plant information includes the configuration information of the devices provided in the plant. Conditions related to plant evaluation such as the operating environment information and operating pattern information of the plant are both recorded, and the performance models of all devices are recorded. The performance model includes performance information such as mass balance, heat balance, thermal efficiency, and the design values of the output of each device or the heat balance of all devices, the thermal efficiency based on the heat balance, and the output.

[0004] A power plant simulator develops a process model, a control model, and an operator screen based on the design data (Isometric Drawings, Control Logic Diagram, Heat Balance, etc.) and the operation and operation data (control system operation screen, performance data, etc.) of the power plant to be developed.

[0005] In particular, a nuclear power plant simulator is a simulation training device that enables operators to practice in an environment identical to the actual situation based on high safety and precision. It is a facility that enables the cultivation of the operation ability of power plant operators, the verification and development of operation procedure manuals, the preliminary inspection of control techniques and safety analysis, and the improvement of operation methods. At the same time, it includes the function of setting external environmental variables, which is one of the main functions of the simulator instructor station.

[0006] However, the function of setting external environmental variables in the instructor station cannot be physically realized by manual input by the user to reflect the changes that occur simultaneously and frequently in natural phenomena, and it is impossible to include them in the simulation range.

[0007] In general, the external environmental variables of the instructor station often do not match the reference data reflected in the actual power plant design and the data at the time when the simulator is developed and utilized. Moreover, it is difficult to reflect the variables that change in real time in the simulator.

[0008] Therefore, it is difficult to perform simulations while linking in real time with changing conditions during power plant operation.

[0009] Also, usually in a power plant simulator, the initial conditions of the power plant simulation system are specified in the form of scenarios pre-classified according to the operating environment in the configuration system information input file, and the related system model settings are always analyzed under the condition of being restricted by the already specified conditions, etc., and there is a problem that the dynamic conditions according to the real-time state of the actual power plant system cannot be realized.

[0010] Thus, as a simulation program that mimics the behavior of the primary and secondary systems of a nuclear power plant, the nuclear power simulator developed for operator training ensured fast calculation time and relatively high accuracy under specified conditions. However, the initial conditions of the simulation had to be created through another process, and the simulation was performed based on a pre-prepared operation scenario, so there were many limitations in the predictive simulation of the power plant.

Prior Art Documents

Patent Documents

[0011]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0012] The technical problem of the present invention to solve the above-mentioned problems is to relate the field values of a power plant and, when a difference occurs between the calculated field value by simulation and the power plant field value, to perform model optimization of the simulation reflecting the power plant field value and provide a simulation system capable of tracking the power plant state in real time.

[0013] The technical problem of the present invention for solving the above problems is to enable the power plant behavior to be tracked in real time under conditions other than the scenario conditions in a simulation that mimics the behavior of the primary and secondary systems of a power plant, by allowing the power plant state at the current operating time to be set as the initial condition without another initial condition generation process for the simulation even in an operating environment other than the predetermined scenario conditions. That is, to provide a simulation system.

Means for Solving the Problem

[0014] As one aspect for achieving the above object, a simulation system for tracking the state of a power plant in real time includes an operation information DB management unit that collects power plant field values at the n-th time point, an integrated simulation module that mimics the behavior of the power plant based on the converged field values through numerical analysis of a power plant model with the power plant field values at the n-th time point as the input, an initial condition DB management unit that searches for the power plant field values at the n-th time point and the converged field values within a predetermined condition range among the converged field values through numerical analysis of the power plant model and provides them as the initial condition field values for the simulation performed by the integrated simulation module, a calculation method determination unit that determines the simulation calculation method performed by the integrated simulation module according to the comparison result between the power plant field values at the n-th time point and the simulation calculation values of the integrated simulation module, and a simulation correction unit that corrects the parameters related to the main variables of the simulation model in the integrated simulation module by reflecting the power plant field values at the n-th time point when the difference between the power plant field values at the n-th time point and the simulation calculation values of the integrated simulation module is outside a predetermined error range. The simulation calculation method includes a simulation method for predicting the power plant field values at the n-th time point in real time and an overriding method for applying the corrected parameters of the simulation model so that the converged field values through numerical analysis of the power plant model match the power plant field values at the n-th time point.

[0015] In addition, the operation information DB management unit selects a variable for comparing the power plant field value at the n-th point in time with the simulation calculation value, and includes a process of removing the error of the equipment that measures the power plant field value at the n-th point in time through the process of correcting the selected variable.

[0016] In addition, the integrated simulation module includes a primary and secondary system, control logic, electrical and power models within the power plant, and includes a simulator for operator training that mimics the overall behavior of the power plant in real time.

[0017] As an example, when the integrated simulation module starts the calculation in the overriding method, the integrated simulation module selects, as the initial condition field value of the simulation, the initial condition field value provided by the initial condition DB management unit and the field value having the smallest error from the power plant field value at the n-th point in time among the field values calculated by the simulation method before switching to the overriding method.

[0018] In addition, in the overriding method, the initial condition DB management unit searches for a field value corresponding to a range within a predetermined accuracy among the power plant field values at the n-th point in time received from the operation information DB management unit, defines the searched field value as the first initial condition, and provides it to the integrated simulation module.

[0019] Furthermore, in the overriding method, the integrated simulation module inputs, as the virtual boundary condition of the main variable of the simulation model, the field value that matches the main variable among the power plant field values at the n-th point in time, starts the calculation with the initial condition field value, and performs the calculation by being provided with a correction value of the parameter related to the main variable of the simulation model from the simulation correction unit so that the main variable converges to the virtual boundary condition.

[0020] In addition, in the overwriting method, the integrated simulation module further includes adjusting parameters related to the variables of the simulation model based on the first initial condition provided by the simulation correction unit until the variables of the simulation model converge to the power plant field value at the n-th time point corresponding to the variables of the simulation model, and performing iterative calculations.

[0021] As an example, if the variable of the simulation model converges within a predetermined accuracy to the power plant field value at the n-th time point corresponding to the variable based on the first initial condition, the calculation method determination unit outputs the variable under the second initial condition of the simulation model and provides it to the initial condition DB management unit.

[0022] In addition, the integrated simulation module performs a simulation based on the second initial condition provided by the initial condition DB management unit and the power plant field value received at the (n + 1)-th time point.

[0023] On the other hand, in a simulation method for tracking the status of a power plant in real time, an operation information collection step in which an operation information DB management unit collects power plant field values at the n-th time point, a step of mimicking the behavior of the power plant based on the converged field values through numerical analysis of a power plant model in which an integrated simulation module uses the power plant field values at the n-th time point as input, an initial condition DB management unit searches for the power plant field values at the n-th time point and the converged field values within a predetermined condition range among the field values converged through the numerical analysis of the power plant model, and provides them as initial condition field values for the simulation performed by the integrated simulation module, a calculation method determination unit determines the simulation calculation method performed by the integrated simulation module according to the comparison result between the power plant field values at the n-th time point and the simulation calculation values of the integrated simulation module, and a simulation correction unit, when the difference between the power plant field values at the n-th time point and the simulation calculation values of the integrated simulation module is outside a predetermined error range, corrects the parameters related to the main variables of the simulation model in the integrated simulation module by reflecting the power plant field values at the n-th time point. The simulation calculation method includes a simulation method for predicting the power plant field values at the n-th time point in real time and an overriding method for applying the corrected parameters of the simulation model so that the field values converged through the numerical analysis of the power plant model match the power plant field values at the n-th time point.

Effect of the Invention

[0024] According to the simulation system proposed through the present invention, without assuming initial conditions and performing calculations according to a determined scenario, the operation information of the power plant is associated in real time, and real-time status tracking of the power plant and prediction of the behavior of the power plant with the power plant status at the operation time point as the initial condition are made possible through a simulation system that reflects the real-time power plant status without an operation scenario.

[0025] In addition, through a system that tracks the power plant status in real time and continuously ensures simulation accuracy without the need for separate intervention by the administrator, precise analysis, monitoring, and diagnosis of the operation status of the main systems / equipment are made possible.

[0026] In addition, since the power plant simulation at the current operating time is possible, it is possible to derive optimal operating conditions and prevent trial and error through pre-operation and behavior analysis of the main system operation and control, and it can be utilized to ensure the ability of the operator to handle accident conditions and abnormal situations.

[0027] In addition, since a power plant real-time system simulation system is ensured, it can be utilized as background information for precise performance analysis by main system and equipment, and is applicable to the prediction of equipment performance and life and asset management reflecting the power plant status information.

Brief Description of the Drawings

[0028]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0029] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, some configurations not related to the gist of the invention may be omitted or compressed. Even the omitted configurations are not necessarily unnecessary for the present invention and can be combined and used by those with ordinary knowledge in the technical field to which the present invention pertains.

[0030] FIG. 1 is an overall block configuration diagram of a simulation system for real-time tracking of the power plant state of a power plant field value base according to an embodiment of the present invention.

[0031] As shown in FIG. 1, a simulation system 1 for real-time tracking of the power plant state of the power plant field value base of the present invention includes an operation information DB management unit 101, an integrated simulation module 102, an initial condition DB management unit 107, a calculation method determination unit 108, and a simulation correction unit 109.

[0032] First, the operation information DB management unit 101 periodically receives and stores the actual power plant operation information (PI) 120 from the power plant monitoring system (PMS, Plant Monitoring System) 2, purifies the power plant measurement values to remove the bias or physical errors of the measurement equipment for the field values of all system devices in the power plant. For example, it calibrates the error of the received actual power plant operation information (PI) 120 (e.g., adjusts it to a value suitable for the flow rate, momentum, and energy balance of the power plant system or / and performs statistical processing such as averaging over time), and outputs the operation information field value (PI_DB) 130. Variables can be selected with the operation information field value (PI_DB) 130 for comparison with the simulation calculation value 140 of the integrated simulation module 102.

[0033] The integrated simulation module 102 outputs a simulation calculation value 140 using a simulation program 104 that can simulate the overall behavior of a power plant in real time based on a simulation model 103 that models the primary and secondary overall systems, equipment, control logic, and electrical power devices of the power plant. The simulation model 103 can include a power plant physical model, and the simulation program 104 can include a process of deriving a field value converged through numerical analysis.

[0034] In addition, the simulation program 104 can include a simulation method 105 for predicting the operation information field value (PI_DB) 130 in real time, and an overriding method 106 for substituting the main operation information field value (PI_DB) 130 as a boundary condition of the simulation model 103 in the integrated simulation module 102 so that the real-time state of the power plant can be reflected in the simulation model 103.

[0035] The overriding method 106 can be configured by a process of inputting the main power plant measurement data among the operation information field values (PI_DB) 130 as boundary conditions of the relevant system and equipment models of the simulation model 103, and repeatedly calculating and automatically correcting a separate solution model so that the converged calculation field matches the operation data. Through this, the simulation model 103 can be automatically corrected so that the numerical analysis field value converges to the measured value, and the fidelity can be improved by updating the simulation model 103 to reflect the real-time operation state of the power plant.

[0036] The integrated simulation module 102 outputs the calculation field value (SIM_SM) 150 of the simulation method as the simulation calculation value 140 in the case of the simulation method 105, and outputs the calculation field value (SIM_OM) 160 of the overriding method as the simulation calculation value 140 in the case of the overriding method 106 according to the calculation method of the simulation program 104.

[0037] The initial condition DB management unit 107 models all the system devices in the power plant for the simulation execution of the integrated simulation module 102, documents the field values converged through numerical analysis, searches for the field value closest to the real-time operating state of the power plant, and outputs it as the initial condition of the operation information field value (PI_DB) 130.

[0038] The calculation method determination unit 108 analyzes the difference between the operation information field value (PI_DB) 130 output from the operation information DB management unit 101 and the simulation calculation value 140 output from the integrated simulation module 102, and determines the calculation method of the simulation program 104 in the integrated simulation module 102 according to the magnitude of the difference. That is, when the difference between the operation information field value (PI_DB) 130 and the simulation calculation value 140 output from the integrated simulation module 102 is within a predetermined error range, the integrated simulation module 102 is operated in the simulation method 105, and the calculation field value (SIM_SM) 150 of the simulation method is output as the simulation calculation value 140. The calculation method determination unit 108 compares and analyzes the calculation field value (SIM_SM) 150 of the simulation method with the operation information field value (PI_DB) 130.

[0039] On the contrary, when the operation information field value (PI_DB) 130 and the simulation calculation value 140 output from the integrated simulation module 102 are outside the predetermined error range, the integrated simulation module 102 is operated in the overriding method 106, and the calculation field value (SIM_OM) 160 of the overriding method is output as the simulation calculation value 140. The calculation method determination unit 108 compares and analyzes the calculation field value (SIM_OM) 160 of the overriding method with the operation information field value (PI_DB) 130.

[0040] When the simulation calculation value 140 output from the integrated simulation module 102 and the operation information field value (PI_DB) 130 are outside a predetermined error range, the simulation correction unit 109 corrects the parameters related to the main variables of the simulation model 103 in the integrated simulation module 102 by reflecting the operation information field value (PI_DB) 130.

[0041] FIG. 2 is a diagram showing an operation flowchart when the simulation system according to the embodiment of the present invention performs calculations in a simulation method.

[0042] As shown in FIG. 2, the operation information DB management unit 202 periodically receives and stores the actual power plant operation information (PI) 210 from the power plant monitoring system 201, and outputs the operation information field value (PI_DB) 220 for comparison with the calculation field value (SIM_SM) 230 of the simulation method calculated by the integrated simulation module 204. It corrects the error of the received actual power plant operation information (PI) 210, adjusts it to a value suitable for the system flow rate, momentum, energy balance, etc., and / or performs statistical processing such as averaging over time, and selects a variable for comparison with the calculation field value (SIM_SM) 230 of the simulation method output from the integrated simulation module 204.

[0043] The integrated simulation module 204 outputs the calculation field value (SIM_SM) 230 of the simulation method and outputs it to the calculation method determination unit 203.

[0044] The calculation method determination unit 203 receives and compares the calculation field value (SIM_SM) 230 of the simulation method and the operation information field value (PI_DB) 220. When the calculation field value (SIM_SM) 230 of the simulation method and the operation information field value (PI_DB) 220 are within a predetermined error range, it causes the integrated simulation module 204 to continue the calculation in the simulation method 206 while predicting the power plant behavior.

[0045] On the other hand, when it is determined that the calculated field value (SIM_SM) 230 of the simulation method and the operation information field value (PI_DB) 220 are outside a predetermined error range, the calculation method determination unit 203 switches the calculation execution of the integrated simulation module 204 from the simulation method 206 to the overriding method 207, and outputs the operation information field value (PI_DB) 220 to the initial condition DB management unit 205.

[0046] FIG. 3 is a diagram showing an operation flowchart when the simulation system according to the embodiment of the present invention performs calculation in the overriding method.

[0047] As shown in FIG. 3, the initial condition DB management unit 305 searches for simulation initial conditions corresponding to the received operation information field value (PI_DB) within a predetermined accuracy range, and provides the initial condition field value (IC_DB) 340 to the integrated simulation module 304.

[0048] When starting the calculation in the overriding method 307, the integrated simulation module 304 can select, as the initial condition field value, the value closest to the operation information field value (PI_DB) among the initial condition field value (IC_DB) 340 provided by the initial condition DB management unit 305 and the most recent field value calculated by the simulation method 306 immediately before switching to the overriding method 307.

[0049] The integrated simulation module 304 performs calculations in the overriding method 307. As the virtual boundary condition of the main variables of the simulation model 103, it inputs, as the target value, the value that matches the main variables among the operation information field values (PI_DB). Starting the calculation with the initial condition field value, it performs calculations with the correction value 370 of the model parameters related to the main variables of the simulation model provided from the simulation correction unit 306 so that the main variables converge to the target values in the operation information field. Also, the integrated simulation module 304 outputs the calculation field value (SIM_OM) 330 of the overriding method calculated by the overriding method 307 to the calculation method determination unit 303.

[0050] In the calculation method determination unit 303, by comparing and analyzing with the operation information field value (PI_DB) 320, it determines whether or not the main variables have converged to the target values in the overriding method 307.

[0051] Based on the analysis result between the operation information field value (PI_DB) 320 and the calculation field value (SIM_OM) 330 of the overriding method, the simulation correction unit 306 transmits the correction value 370 of the model parameters related to the main variables to the integrated simulation module 304 so that the simulation model 103 can reflect the operation information field value.

[0052] Next, when the main variables converge to the target values within a predetermined accuracy range, the calculation method determination unit 303 transmits a SNAP (360) command to the integrated simulation module 304. The integrated simulation module 304 defines the converged field value from the simulation model 103 as the new initial condition (IC_DB_new) 350 and outputs the initial condition (IC_DB_new) 350 to the initial condition DB management unit 305.

[0053] The integrated simulation module 304 repeats the process of tracking power plant operation information in real time in the simulation method 306 or the overriding method 307 based on the new initial conditions (IC_DB_new) 350.

[0054] FIG. 4 is a diagram showing an operation flowchart for associating power plant operation information in the integrated simulation module when the simulation system according to the embodiment of the present invention performs calculations in the overriding method.

[0055] As shown in FIG. 4, when the simulation model (not shown) in the integrated simulation module 305 of FIG. 3 includes nodes 1, 2, 3 (420, 430, 440) and boundary nodes 1, 2 (410, 450), if the integrated simulation module 305 of FIG. 3 attempts to apply the operation information field value as the target value for the main variable at node 3 (440) during the calculation in simulation method 1, in the overriding method 2, virtual boundary nodes 1, 2 (460, 470) are generated between the previously located node 2 (430) and node 3 (440) in the flow of calculation information. The virtual boundary node 1 (460) and the virtual boundary node 2 (470) are disconnected and do not affect each other during the simulation calculation process. Then, the target value to be applied to node 3 (440) is input as a fixed boundary condition to the virtual boundary node 1 (460) connected to node 2 (430). Also, the virtual boundary node (470) connected to node 3 (440) sets the boundary condition so as to have the same value as node 3 (440).

[0056] In the overriding method 2, the simulation correction unit (306 in FIG. 3) provides a correction value for the main variable related model parameters of the simulation model so that node 3 (440) converges to the target value of the operation information field, and the calculation is performed.

Explanation of Signs

[0057] 1 Simulation system 2. 201 Power Plant Monitoring System (PI) 101, 202, 302 Operation Information DB Management Unit 102, 204, 304 Integrated Simulation Module 107, 205, 305 Initial Condition DB Management Unit 108, 203, 303 Calculation Method Judgment Unit 109, 306 Simulation Correction Unit 410, 450 Boundary Node 420, 430, 440, 460, 470 Node

Claims

1. An operation information DB management unit that collects power plant field values at the n-th time point (n is an integer), An integrated simulation module that mimics the behavior of a power plant based on the converged field values through numerical analysis of a power plant model with the power plant field value at the n-th time point as input, An initial condition DB management unit that searches for the converged field values within a predetermined condition range of the power plant field value at the n-th time point among the converged field values through numerical analysis of the power plant model, and provides the searched converged field values as the initial condition field values for the simulation performed by the integrated simulation module, A calculation method determination unit that determines the simulation calculation method performed by the integrated simulation module according to the comparison result between the power plant field value at the n-th time point and the simulation calculation value of the integrated simulation module, A simulation correction unit that corrects the parameters related to the main variables of the simulation model in the integrated simulation module by reflecting the power plant field value at the n-th time point when the difference between the power plant field value at the n-th time point and the simulation calculation value of the integrated simulation module is outside a predetermined error range, Comprising The simulation calculation method includes a simulation method that predicts the power plant field value at the n-th time point in real time using the power plant model, and an overriding method that applies the corrected parameters of the simulation model so that the converged field value through numerical analysis of the power plant model matches the power plant field value at the n-th time point. A simulation system for tracking the state of a power plant in real time.

2. The operation information DB management unit according to claim 1, including a process of selecting a variable for comparison with the simulation calculation value from the power plant field value at the n-th time point, and removing the error of the equipment that measures the power plant field value at the n-th time point through the process of correcting the selected variable. A simulation system for tracking the state of a power plant in real time.

3. The integrated simulation module includes the primary and secondary systems, control logic, electrical and power models within the power plant, and includes a simulator for operator training that mimics the overall behavior of the power plant in real time. The simulation system for tracking the state of the power plant according to claim 1 in real time.

4. When the integrated simulation module starts the calculation in the overriding method, the integrated simulation module, selects, as the initial condition field value of the simulation, the field value of the power plant at the n-th time point and the field value having the minimum error among the field values calculated by the simulation method before switching to the overriding method, from among the initial condition field values provided by the initial condition DB management unit. The simulation system for tracking the state of the power plant according to claim 1 in real time.

5. In the overriding method, the initial condition DB management unit, searches for field values corresponding to a range within a predetermined accuracy among the field values of the power plant at the n-th time point received from the operation information DB management unit, and defines the searched field values as the first initial conditions and provides them to the integrated simulation module. The simulation system for tracking the state of the power plant according to claim 1 in real time.

6. In the overriding method, the integrated simulation module, inputs, as virtual boundary conditions of the main variables of the simulation model, the field values that match the main variables among the field values of the power plant at the n-th time point, starts the calculation with the initial condition field values, and receives, from the simulation correction unit, correction values of the parameters related to the main variables of the simulation model so that the main variables converge to the virtual boundary conditions, and performs the calculation. The simulation system for tracking the state of the power plant according to claim 1 in real time.

7. In the overriding method, the integrated simulation module, The simulation system for tracking the state of a power plant in real time according to claim 1, further comprising adjusting parameters related to the variables of the simulation model based on the first initial conditions provided by the simulation correction unit until the variables of the simulation model converge to the power plant field values at the n-th time point corresponding to the variables of the simulation model, and performing iterative calculations.

8. The simulation system for tracking the state of a power plant in real time according to claim 7, wherein the calculation method determination unit outputs the variable under the second initial conditions of the simulation model and provides it to the initial condition DB management unit if the variables of the simulation model converge within a predetermined accuracy to the power plant field values at the n-th time point corresponding to the variables based on the first initial conditions.

9. The simulation system for tracking the state of a power plant in real time according to claim 8, wherein the integrated simulation module performs a simulation based on the second initial conditions provided by the initial condition DB management unit and the power plant field values received at the (n + 1)-th time point.

10. In a simulation method for tracking the state of a power plant in real time, an operation information collection step in which the operation information DB management unit collects the power plant field values at the n-th time point; a step of simulating the behavior of the power plant based on the converged field values through numerical analysis of the power plant model with the power plant field values at the n-th time point as inputs by the integrated simulation module; a step in which the initial condition DB management unit searches for the converged field values within a predetermined condition range of the power plant field values at the n-th time point among the converged field values through numerical analysis of the power plant model, and provides the searched converged field values as the initial condition field values for the simulation performed by the integrated simulation module; a step in which the calculation method determination unit determines the simulation calculation method performed by the integrated simulation module according to the comparison result between the power plant field values at the n-th time point and the simulation calculation values of the integrated simulation module. When the difference between the power plant field value at the n-th time point and the simulation calculation value of the integrated simulation module is outside a predetermined error range, the simulation correction unit corrects parameters related to the main variables of the simulation model in the integrated simulation module by reflecting the power plant field value at the n-th time point. including The simulation calculation method includes a simulation method for predicting the power plant field value at the n-th time point in real time using the power plant model, and an overriding method for applying the corrected parameters of the simulation model so that the field value converged through numerical analysis of the power plant model matches the power plant field value at the n-th time point. A simulation method for tracking the state of a power plant in real time.

11. The operation information collection step includes selecting a variable for comparison with the simulation calculation value from the power plant field value at the n-th time point, and removing the error of the equipment that measures the power plant field value at the n-th time point through the process of correcting the selected variable. The simulation method for tracking the state of a power plant in real time according to claim 10.

12. The integrated simulation module includes a primary and secondary system, control logic, electrical and power models in the power plant, and includes a simulator for training operators that mimics the overall behavior of the power plant in real time. The simulation method for tracking the state of a power plant in real time according to claim 10.

13. When the integrated simulation module starts calculation in the overriding method, the integrated simulation module selects, as the initial condition field value of the simulation, the initial condition field value provided by the initial condition DB management unit and the field value having the smallest error with the power plant field value at the n-th time point among the field values calculated by the simulation method before switching to the overriding method. The simulation method for tracking the state of a power plant in real time according to claim 10.

14. In the overriding method, the initial condition DB management unit Among the power plant field values at the n-th time point received from the operation information DB management unit, search for field values within a range of a predetermined accuracy, define the searched field values as the first initial conditions, and provide them to the integrated simulation module. The simulation method for tracking the state of a power plant in real time according to claim 10.

15. In the overriding method, the integrated simulation module Among the power plant field values at the n-th time point, input the field values that match the main variables as virtual boundary conditions of the main variables of the simulation model, start the calculation with the initial condition field values, and perform the calculation by being provided with correction values of the parameters related to the main variables of the simulation model from the simulation correction unit so that the main variables converge to the virtual boundary conditions. The simulation method for tracking the state of a power plant in real time according to claim 10.

16. In the overriding method, the integrated simulation module Further includes the step of adjusting parameters related to the variables of the simulation model based on the first initial conditions provided from the simulation correction unit until the variables of the simulation model converge to the power plant field values at the n-th time point corresponding to the variables of the simulation model, and performing iterative calculations. The simulation method for tracking the state of a power plant in real time according to claim 10.

17. If the variables of the simulation model converge within a predetermined accuracy to the power plant field values at the n-th time point corresponding to the variables based on the first initial conditions, include the step of outputting the variables with the second initial conditions of the simulation model and providing them to the initial condition DB management unit. The simulation method for tracking the state of a power plant in real time according to claim 16.

18. The integrated simulation module performs a simulation based on the second initial conditions provided by the initial condition DB management unit and the power plant field values received at the (n + 1)-th time point. The simulation method for tracking the state of a power plant in real time according to claim 17.

Images