A method and system for verification and optimization of safety-level DCS system

Abstract

In order to solve the technical problem that the verification and optimization of the safety-level DCS system is difficult in the prior art, the embodiment of the present invention provides a method and system for verification and optimization of the safety-level DCS system, including: S1. Using nuclear power simulation to generate safety-level DCS system operating parameters; S2. Transmitting the safety-level DCS system operating parameters to the safety-level DCS system, so that the safety-level DCS system runs the safety-level DCS system operating parameters for verification and optimization; S3. Receiving the dynamic adjustment control instructions for adjusting the safety-level DCS system operating parameters generated by the safety-level DCS system running the safety-level DCS system operating parameters, so that the simulation host generates new safety-level DCS system operating parameters according to the dynamic adjustment control instructions and returns to S2 until the verification and optimization of the safety-level DCS system is completed. The embodiment of the present invention realizes the verification and optimization of the safety-level DCS system.

Description

Technical Field

[0001] The invention relates to a method and a system for verification and optimization of a safety-level DCS system. Background Art

[0002] The safety-level DCS system of a nuclear power plant is divided into safety-level and non-safety-level. The safety-level DCS system is the basis for the safe operation of a nuclear power plant. The safety-level DCS system consists of instrumentation and control equipment hardware and software. The number of system equipment is huge and intertwined. The design of some control logic is functionally special and will only be triggered under special operating conditions. If its design cannot be verified in actual operation, it is impossible to determine whether the function meets the final requirements. Therefore, in the iterative design process of the safety-level DCS system, it is necessary to verify and optimize its configuration and control performance in combination with the controlled object.

[0003] After the design and production of the safety-level DCS system is completed, it is necessary to verify the safety-level DCS system before it is put into use, and test and check whether there are design problems and equipment defects. The verification of the safety-level DCS system of a nuclear power plant includes two stages: factory testing before leaving the factory and on-site commissioning before being put into use. The verification test objects, test methods, test basis, test content, etc. of these two stages in China are different. Therefore, there must be a certain degree of difference in the test, commissioning and verification of these two stages, which will also lead to an increase in the verification and optimization workload of the safety-level DCS system, a longer cycle, and higher costs. At the same time, due to the special requirements for the safety of nuclear power plants, the safety-level DCS system needs to be verified on site. As a result, the risk of unnecessary accidents in the design and production process of the safety-level DCS system is also greatly increased. Therefore, it is not practical to verify the safety-level DCS system in a real operating nuclear power plant. Summary of the invention

[0004] In order to solve the technical problem that there are difficulties in verifying and optimizing a safety-level DCS system in the prior art, an embodiment of the present invention provides a method and system for verifying and optimizing a safety-level DCS system.

[0005] The embodiment of the present invention is achieved through the following technical solutions:

[0006] In a first aspect, an embodiment of the present invention provides a method for optimizing verification of a safety-level DCS system, including:

[0007] S1. Generate safety-level DCS system operating parameters using nuclear power simulation;

[0008] S2. The safety-level DCS system operating parameters are transmitted to the safety-level DCS system so that the safety-level DCS system operates the safety-level DCS system operating parameters for verification and optimization;

[0009] S3. Receive the dynamic adjustment control instructions for adjusting the safety-level DCS system operating parameters generated by the safety-level DCS system running the safety-level DCS system operating parameters, so that the simulation host generates new safety-level DCS system operating parameters according to the dynamic adjustment control instructions and returns to S2 until the safety-level DCS system verification optimization is completed.

[0010] Further, S1. Generate safety-level DCS system operating parameters using nuclear power simulation; including:

[0011] The thermal hydraulic and point reactor dynamics models are used to simulate the operating parameters of the primary and secondary circuit systems and equipment during the continuous operation of the nuclear power plant, and the operating parameters of the safety-level DCS system are generated.

[0012] Further, S3. receiving the dynamic adjustment control instruction for adjusting the operating parameters of the safety-level DCS system generated by the operating parameters of the safety-level DCS system, so that the simulation host generates the operating parameters of the safety-level DCS system according to the dynamic adjustment control instruction and returns to S2 until the verification and optimization of the safety-level DCS system is completed; including:

[0013] Receive new parameter values ​​and action instructions generated by the safety-level DCS system running the safety-level DCS system operating parameters, so that the simulation host adjusts the parameters of the thermal hydraulic and point reactor dynamics models according to the new parameter values ​​and action instructions to generate new safety-level DCS system operating parameters and return to S2 until the safety-level DCS system verification optimization is completed.

[0014] In a second aspect, an embodiment of the present invention provides a system for verification and optimization of a safety-level DCS system, including:

[0015] A parameter generation unit, used to generate safety-level DCS system operating parameters using nuclear power simulation;

[0016] A verification and optimization unit, used for transmitting the operating parameters of the safety-level DCS system to the safety-level DCS system, so that the safety-level DCS system operates the operating parameters of the safety-level DCS system for verification and optimization;

[0017] a receiving unit, configured to receive a dynamic adjustment control instruction for adjusting the operating parameters of the safety-level DCS system generated by the safety-level DCS system running the operating parameters of the safety-level DCS system; and

[0018] The loop optimization unit is used to generate new safety-level DCS system operating parameters according to the dynamic adjustment control instruction and return to the verification optimization unit until the safety-level DCS system verification optimization is completed.

[0019] Furthermore, the parameter generation unit is also used to simulate the operating parameters of the primary and secondary circuit systems and equipment during the continuous operation of the nuclear power plant using thermal hydraulics and point reactor dynamics models to generate safety-level DCS system operating parameters.

[0020] In a third aspect, an embodiment of the present invention provides a system for verification and optimization of a safety-level DCS system, including:

[0021] A simulation host, used for generating safety-level DCS system operating parameters by adopting thermal hydraulic and point reactor dynamics model nuclear power simulation, and for transmitting the safety-level DCS system operating parameters to the safety-level DCS system, so that the safety-level DCS system runs the safety-level DCS system operating parameters for verification and optimization; and for receiving dynamic adjustment control instructions for adjusting the safety-level DCS system operating parameters generated by the safety-level DCS system running the safety-level DCS system operating parameters, so that the simulation host generates new safety-level DCS system operating parameters by adopting nuclear power simulation according to the dynamic adjustment control instructions, so that the safety-level DCS system runs the new safety-level DCS system operating parameters for verification and optimization; and

[0022] The control system module is used to control and protect the nuclear power simulation process, and to control the simulation host to adjust the parameters of the thermal hydraulic and point reactor dynamics models.

[0023] Furthermore, it also includes: an interface display module for displaying nuclear power simulation data, equipment status display and alarm signals.

[0024] Furthermore, it also includes: a data interaction module for realizing data exchange between the thermal hydraulic and point pile dynamics models, the control system module, and the interface display module.

[0025] Furthermore, it also includes an interface system; the interface system includes:

[0026] The data transmission part of the interface system connected to the safety-level DCS system is used to transmit the simulation host operation data and equipment status signals to the safety-level DCS system or / and transmit the dynamic adjustment control instructions generated by the safety-level DCS system operation parameters to the simulation host for adjusting the safety-level DCS system operation parameters.

[0027] Further, the interface system includes:

[0028] The simulation function part of the interface system connected to the safety-level DCS system is used to realize the start, loading, stepping, freezing, stopping, saving working conditions and / or loading working conditions during the use of the simulation host.

[0029] Compared with the prior art, the embodiments of the present invention have the following advantages and beneficial effects:

[0030] A method and system for verifying and optimizing a safety-level DCS system according to an embodiment of the present invention generates safety-level DCS system operating parameters by adopting nuclear power simulation; transmits the safety-level DCS system operating parameters to a safety-level DCS system, so that the safety-level DCS system runs the safety-level DCS system operating parameters for verification and optimization; receives dynamic adjustment control instructions for adjusting the safety-level DCS system operating parameters generated by the safety-level DCS system running the safety-level DCS system operating parameters, so that a simulation host generates new safety-level DCS system operating parameters according to the dynamic adjustment control instructions and returns to S2 until the verification and optimization of the safety-level DCS system is completed, thereby realizing verification and optimization of the safety-level DCS system and solving the technical problem that verification and optimization of the safety-level DCS system is difficult in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 Schematic diagram of the method flow for safety-level DCS system verification optimization.

[0033] Figure 2 A schematic diagram of a system structure for verification and optimization of a safety-level DCS system.

[0034] Figure 3 This is another schematic diagram of the system structure used for safety-level DCS system verification optimization. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0036] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to one of ordinary skill in the art that these specific details are not necessarily employed to practice the present invention. In other embodiments, in order to avoid obscuring the present invention, well-known structures, circuits, materials, or methods are not specifically described.

[0037] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] In the description of the present invention, the directions or positional relationships indicated by terms such as “front”, “rear”, “left”, “right”, “up”, “down”, “vertical”, “horizontal”, “high”, “low”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention.

[0039] Example

[0040] The iterative design cycle of the safety-level DCS system is very long, and the test and operation and maintenance costs are much higher than those of the non-safety-level DCS system. In order to assist in verifying the correctness of the design of the safety-level DCS system under special working conditions, reduce the later trial and error costs, and improve the efficiency of configuration logic verification, the embodiment of the present invention provides a method for verification and optimization of the safety-level DCS system, with reference to Figure 1 As shown, including:

[0041] S1. Generate safety-level DCS system operating parameters using nuclear power simulation;

[0042] S2. The safety-level DCS system operating parameters are transmitted to the safety-level DCS system so that the safety-level DCS system operates the safety-level DCS system operating parameters for verification and optimization;

[0043] S3. Receive the dynamic adjustment control instructions for adjusting the safety-level DCS system operating parameters generated by the safety-level DCS system running the safety-level DCS system operating parameters, so that the simulation host generates new safety-level DCS system operating parameters according to the dynamic adjustment control instructions and returns to S2 until the safety-level DCS system verification optimization is completed.

[0044] Therefore, the embodiment of the present invention generates safety-level DCS system operating parameters by adopting nuclear power simulation; transmits the safety-level DCS system operating parameters to the safety-level DCS system, so that the safety-level DCS system runs the safety-level DCS system operating parameters for verification and optimization; receives dynamic adjustment control instructions for adjusting the safety-level DCS system operating parameters generated by the safety-level DCS system running the safety-level DCS system operating parameters, so that the simulation host generates new safety-level DCS system operating parameters according to the dynamic adjustment control instructions and returns to S2 until the verification and optimization of the safety-level DCS system is completed, thereby realizing the verification and optimization of the safety-level DCS system and solving the technical problem that there are difficulties in the verification and optimization of the safety-level DCS system in the prior art.

[0045] Further, S1. Generate safety-level DCS system operating parameters using nuclear power simulation; including:

[0046] The thermal hydraulic and point reactor dynamics models are used to simulate the operating parameters of the primary and secondary circuit systems and equipment during the continuous operation of the nuclear power plant, and the operating parameters of the safety-level DCS system are generated.

[0047] Further, S3. receiving the dynamic adjustment control instruction for adjusting the operating parameters of the safety-level DCS system generated by the operating parameters of the safety-level DCS system, so that the simulation host generates the operating parameters of the safety-level DCS system according to the dynamic adjustment control instruction and returns to S2 until the verification and optimization of the safety-level DCS system is completed; including:

[0048] Receive new parameter values ​​and action instructions generated by the safety-level DCS system running the safety-level DCS system operating parameters, so that the simulation host adjusts the parameters of the thermal hydraulic and point reactor dynamics models according to the new parameter values ​​and action instructions to generate new safety-level DCS system operating parameters and return to S2 until the safety-level DCS system verification optimization is completed.

[0049] In a second aspect, an embodiment of the present invention provides a system for verifying and optimizing a safety-level DCS system, referring to Figure 2 As shown, including:

[0050] A parameter generation unit, used to generate safety-level DCS system operating parameters using nuclear power simulation;

[0051] A verification and optimization unit, used for transmitting the operating parameters of the safety-level DCS system to the safety-level DCS system, so that the safety-level DCS system operates the operating parameters of the safety-level DCS system for verification and optimization;

[0052] a receiving unit, configured to receive a dynamic adjustment control instruction for adjusting the operating parameters of the safety-level DCS system generated by the safety-level DCS system running the operating parameters of the safety-level DCS system; and

[0053] The loop optimization unit is used to generate new safety-level DCS system operating parameters according to the dynamic adjustment control instruction and return to the verification optimization unit until the safety-level DCS system verification optimization is completed.

[0054] Furthermore, the parameter generation unit is also used to simulate the operating parameters of the primary and secondary circuit systems and equipment during the continuous operation of the nuclear power plant using thermal hydraulics and point reactor dynamics models to generate safety-level DCS system operating parameters.

[0055] In a third aspect, an embodiment of the present invention provides a system for verifying and optimizing a safety-level DCS system, referring to Figure 3 As shown, including:

[0056] A simulation host, used for generating safety-level DCS system operating parameters by adopting thermal hydraulic and point reactor dynamics model nuclear power simulation, and for transmitting the safety-level DCS system operating parameters to the safety-level DCS system, so that the safety-level DCS system runs the safety-level DCS system operating parameters for verification and optimization; and for receiving dynamic adjustment control instructions for adjusting the safety-level DCS system operating parameters generated by the safety-level DCS system running the safety-level DCS system operating parameters, so that the simulation host generates new safety-level DCS system operating parameters by adopting nuclear power simulation according to the dynamic adjustment control instructions, so that the safety-level DCS system runs the new safety-level DCS system operating parameters for verification and optimization; and

[0057] The control system module is used to control and protect the nuclear power simulation process, and to control the simulation host to adjust the parameters of the thermal hydraulic and point reactor dynamics models.

[0058] The system of the embodiment of the present invention is based on nuclear power simulation technology. The simulation host calculates and generates relevant operating parameters of the nuclear power plant. The simulation host and the safety-level DCS system of the nuclear power plant are connected through an interface system. Through the simulation of the operating process, a basis is provided for the verification and optimization of the safety-level DCS system of the nuclear power plant.

[0059] The simulation host is used to calculate the continuous operation process of the simulated nuclear power plant according to the initial working conditions and other condition information input by the user, and transmit the obtained operating parameters to the safety-level DCS system for verification and debugging. It can also receive control instructions from the safety-level DCS system based on the operating parameters and make dynamic adjustments, recalculate the operating parameters, and repeat the process. In addition, it can also display various process system flow interfaces related to the safety-level DCS system, display the operation simulation results, simulate various related equipment, and change the status of related equipment on the interface.

[0060] The interface system is used to connect the simulation host and the safety-level DCS system of the nuclear power plant, serving as a data exchange medium between the two.

[0061] The nuclear power plant safety-level DCS system verification and optimization system of the present invention, the simulation host comprises:

[0062] The thermal hydraulic and point reactor dynamics model is used to simulate the operating parameters and status of the primary and secondary circuit systems and equipment during the continuous operation of the nuclear power plant according to the initial operating conditions and other condition information input in the simulation host operation interface. The parameter and status values ​​calculated by this module will be sent to the safety-level DCS system as the verification and optimization basis of the safety-level DCS system. After calculation and judgment by the safety-level DCS system, the safety-level DCS system sends new parameter values ​​and action instructions to the thermal hydraulic and point reactor dynamics model and makes corresponding changes to recalculate the operating parameters.

[0063] The control system module is used to perform operation control and operation protection of the thermal hydraulic and point reactor dynamics models during the simulation calculation process, and to adjust parameters during the switching of operating conditions.

[0064] The interface display module is used to provide dynamic display of operation simulation data results, equipment status display and alarm signal display, control logic display, equipment trigger switch operation interface, power plant process system flow chart, dynamic operation curve chart.

[0065] The data interaction module is used to realize data exchange between the thermal hydraulic and point reactor dynamics models, the control system module, and the interface display module.

[0066] The nuclear power plant safety-level DCS system verification and optimization system, the interface system includes:

[0067] The data transmission part of the interface system connected to the safety-level DCS system is used to transmit the simulation host operation data and equipment status signals to the safety-level DCS system, and transmit the parameter values ​​and action instructions calculated and judged by the safety-level DCS system to the simulation host through the interface system. The first two steps realize the complete closed-loop interaction process between the simulation host and the safety-level DCS system.

[0068] The simulation function part of the interface system connected to the safety-level DCS system is used to realize the functions of starting, loading, stepping, freezing, stopping, saving working conditions, loading working conditions, etc. during the use of the simulation host, and provide assistance functions for the simulation host in the process of verifying and optimizing the safety-level DCS system.

[0069] The present invention also provides a verification method for the safety-level DCS system of a nuclear power plant, which is based on nuclear power simulation technology, and the simulation host calculates and generates relevant operating parameters of the nuclear power plant. The simulation host and the safety-level DCS system of the nuclear power plant are connected through an interface system, and the verification and optimization of the safety-level DCS system of the nuclear power plant are realized through the simulation of the operation process. Specifically, the following steps are included:

[0070] The simulation host is used to calculate the continuous operation process of the simulated nuclear power plant according to the initial working conditions and other condition information input by the user, transmit the obtained operation parameters to the safety-level DCS system, and receive the control instructions obtained from the safety-level DCS system according to the operation parameters to recalculate the operation parameters, and repeat the process. In addition, it can also display the process interface of each process system related to the safety-level DCS system, display the operation simulation results, simulate each related equipment, and change the status of the related equipment on the interface.

[0071] The interface system is used to connect the simulation host and the safety-level DCS system of the nuclear power plant, serving as a data exchange medium between the two.

[0072] In the nuclear power plant safety-level DCS system verification method according to the present invention, the simulation host further comprises:

[0073] The thermal hydraulic and point reactor dynamics model is used to simulate the operating parameters and status of each system and equipment in the primary and secondary circuits during the continuous operation of the nuclear power plant according to the initial operating conditions and other condition information input in the simulation host operation interface. The parameter and status values ​​calculated by this module will be sent to the safety-level DCS system as the verification and optimization basis of the safety-level DCS system. After calculation and judgment by the safety-level DCS system, the safety-level DCS system sends new parameter values ​​and action instructions to the thermal hydraulic module and makes corresponding changes to recalculate the operating parameters.

[0074] The control system module is used to perform operation control and operation protection of the thermal hydraulic and point reactor dynamics models during the simulation calculation process, and to adjust parameters during the switching of operating conditions.

[0075] The interface display module is used to provide dynamic display of operation simulation data results, equipment status display and alarm signal display, control logic display, equipment trigger switch operation interface, power plant process system flow chart, dynamic operation curve chart.

[0076] The data interaction module is used to realize data exchange between the thermal hydraulic and point reactor dynamics models, the control system module, and the interface display module.

[0077] In the nuclear power plant safety-level DCS system verification method according to the present invention, the interface system includes:

[0078] The data transmission part of the interface system connected to the safety-level DCS system is used to transmit the simulation host operation data and equipment status signals to the safety-level DCS system, and transmit the parameter values ​​and action instructions calculated and judged by the safety-level DCS system to the simulation host through the interface system. The first two steps realize the complete closed-loop interaction process between the simulation host and the safety-level DCS system.

[0079] The simulation function part of the interface system connected to the safety-level DCS system is used to realize the functions of starting, loading, stepping, freezing, stopping, saving working conditions, loading working conditions, etc. during the use of the simulation host, and provide assistance functions for the simulation host in the process of verifying and optimizing the safety-level DCS system.

[0080] The simulation test platform of the embodiment of the present invention covers the working conditions required for the verification of the safety-level DCS system of a nuclear power plant. The simulation host calculates the operation process of the nuclear power plant according to the initial working conditions and displays dynamic experimental data, and performs relevant simulation function operations to facilitate the verification and optimization of the safety-level DCS system. The interface system connects the simulation host and the DCS system equipment, sends the operating parameters calculated by the simulation host to the DCS system, and recalculates the operating parameters and simulates related actions after receiving instructions from the DCS system. The system and method can realize the performance verification and optimization of the safety-level DCS system of a nuclear power unit before it is put into use, making up for the defects of the on-site debugging of the safety-level DCS system, thereby reducing the workload of on-site debugging, reducing costs, and reducing risks.

[0081] Furthermore, it also includes: an interface display module for displaying nuclear power simulation data, equipment status display and alarm signals.

[0082] Furthermore, it also includes: a data interaction module for realizing data exchange between the thermal hydraulic and point pile dynamics models, the control system module, and the interface display module.

[0083] Furthermore, it also includes an interface system; the interface system includes:

[0084] The data transmission part of the interface system connected to the safety-level DCS system is used to transmit the simulation host operation data and equipment status signals to the safety-level DCS system or / and transmit the dynamic adjustment control instructions generated by the safety-level DCS system operation parameters to the simulation host for adjusting the safety-level DCS system operation parameters.

[0085] Further, the interface system includes:

[0086] The simulation function part of the interface system connected to the safety-level DCS system is used to realize the start, loading, stepping, freezing, stopping, saving working conditions and / or loading working conditions during the use of the simulation host.

[0087] The nuclear power plant safety-level DCS system verification and optimization platform involved in the embodiment of the present invention includes two parts: hardware and software. The hardware part is a computer system composed of a simulation host, a display, and a safety-level DCS system cabinet, and also includes network connections between the above devices.

[0088] The display is used to set the initial operating conditions of the simulation host and other condition information through this interface, provide dynamic display of the simulation data results of the simulation host operation, equipment status display and alarm signal display, control logic display, equipment trigger switch operation interface, provide power plant process system flow chart, dynamic operation curve chart.

[0089] The simulation host is used to provide objects for verification and optimization of the safety-level DCS system. According to the initial operating conditions and other condition information set from the display, it calculates and generates the relevant operating parameters and equipment dynamics of the nuclear power plant. Then, the data and dynamic calculation results generated by the simulation host are transmitted to the safety-level DCS system cabinet through the network wiring and interface system, and the parameter values ​​and action instructions calculated and judged by the safety-level DCS system cabinet are received through the network wiring and interface system, and the corresponding changes in the operation process of the nuclear power plant are made according to the instructions of the DCS system. The first two steps realize the complete closed-loop interaction process between the simulation host and the safety-level DCS system. In addition, the above simulation operation results can be displayed on the display to complete the verification process of the safety-level DCS system of the nuclear power plant.

[0090] As the verified system, the safety-level DCS system cabinet is connected to the simulation host through the network wiring formed by the hardware interface and software interface system, so that the data and dynamic calculation results of the simulation host are transmitted to the safety-level DCS system cabinet. The safety-level DCS system cabinet sends the parameter values ​​and action instructions calculated and judged by the simulation host to the simulation host.

[0091] The network connection consists of a hardware interface and a software interface system. The data transmission part of the software interface system connected to the safety-level DCS system is used to transmit the dynamic calculation results of the simulation host operation data and the equipment status signal to the safety-level DCS system cabinet, and transmit the parameter values ​​and action instructions calculated and judged by the safety-level DCS system to the simulation host through the interface system. The first two steps realize the complete closed-loop interaction process between the simulation host and the safety-level DCS system cabinet.

[0092] The simulation function part of the interface system connected to the safety-level DCS system is used to realize the functions of starting, loading, stepping, freezing, stopping, saving working conditions, loading working conditions, etc. during the use of the simulation host, and provide assistance functions for the simulation host in the process of verifying and optimizing the safety-level DCS system.

[0093] refer to Figure 3 As shown, the nuclear power plant safety-level DCS system verification and optimization platform involved in the embodiment of the present invention includes two parts: hardware and software. The software part (such as thermal hydraulics and point reactor dynamics models) is mainly in the simulation host; the hardware part includes a control system module, an interface display module, a data interaction module and an interface system module.

[0094] The thermal hydraulic and point reactor dynamics models are the core of the verification of the safety-level DCS system of nuclear power plants, which include the mathematical models used in the primary and secondary circuit systems and equipment of nuclear power plants, and simulate the production and operation process of process system equipment related to the safety-level DCS system of pressurized water reactor nuclear power plants. The simulation range of the simulation host covers normal operating conditions from hot standby to full power operation, and accident conditions such as small break loss of water in the primary circuit main pipeline and main steam pipeline rupture. Transient conditions also include linear variable load, step variable load, feedwater flow disturbance, as well as normal steady-state conditions and transient conditions. The operation process of the nuclear power plant is simulated by setting the initial working conditions of the simulation host and other condition information from the display. The state parameters such as pressure, temperature, flow, liquid level, power, etc. of each node of the system are calculated by the conservation equations used in the model, as well as the equipment state signals such as valve opening, switch state, and pump speed. The above operation information is transmitted to the safety-level DCS system cabinet through the network connection. Then the safety-level DCS system cabinet analyzes the above parameters and states, generates corresponding instructions according to the design logic, and then transmits them to the thermal hydraulic and point reactor dynamics model through the interface system. The thermal hydraulic and point reactor dynamics model will recalculate the new operating parameters according to the received instructions and parameters and feed them back to the safety-level DCS system cabinet again, forming a closed-loop process.

[0095] The control system module is used to protect the thermal hydraulics and reactor dynamics modules on the one hand, and to control the production process on the other. The control system module builds models based on the protection logic and control logic of actual large-scale pressurized water reactor nuclear power plants. For example: steam generator water level control system, turbine load control system, power control system, injection system, auxiliary feedwater system, turbine bypass system, emergency shutdown system, etc.

[0096] The interface display module is a visualization interface for developing simulation systems through a graphical environment. It is used to provide dynamic display of simulation data results, equipment status display and alarm signal display, control logic display, equipment trigger switch operation interface, power plant process system flow chart, dynamic operation curve chart. Through an operable interface, it provides convenience for running simulations.

[0097] The data interaction module is used to realize data interaction and signal transmission between the thermal hydraulics and point reactor dynamics modules, the control system module, and the interface display module, so that the above modules become an integrated nuclear power plant simulation model rather than isolated parts.

[0098] The interface system module and the interface system overlap with each other, and together realize the data transmission part of the software interface system connected to the safety-level DCS system, which is used to transmit the dynamic calculation results of the simulation host operation data and the equipment status signal to the safety-level DCS system cabinet, and transmit the parameter values ​​and action instructions calculated and judged by the safety-level DCS system to the simulation host through the interface system. The first two steps realize the complete closed-loop interaction process between the simulation host and the safety-level DCS system cabinet.

[0099] In addition, the embodiment of the present invention also provides a verification method for a safety-level DCS system of a nuclear power plant, which is consistent with the verification method described in conjunction with the above-mentioned safety-level DCS system verification and optimization system, that is, based on nuclear power simulation technology, the simulation host calculates and generates relevant operating parameters of the nuclear power plant, and the simulation host and the safety-level DCS system of the nuclear power plant are connected through an interface system, and the verification and optimization of the safety-level DCS system of the nuclear power plant are realized through the simulation of the operation process. Specifically, the following operations are included:

[0100] The simulation host is used to calculate the continuous operation process of the simulated nuclear power plant according to the initial working conditions and other condition information input by the user, transmit the obtained operation parameters to the safety-level DCS system, and receive the control instructions obtained from the safety-level DCS system according to the operation parameters to recalculate the operation parameters, and repeat the process. In addition, it can also display the process interface of each process system related to the safety-level DCS system, display the operation simulation results, simulate each related equipment, and change the status of the related equipment on the interface.

[0101] The interface system is used to connect the simulation host and the safety-level DCS system of the nuclear power plant, serving as a data exchange medium between the two.

[0102] In the safety-level DCS system verification system for a nuclear power plant, the simulation host further comprises:

[0103] The thermal hydraulic and point reactor dynamics model is used to simulate the operating parameters and status of each system and equipment in the primary and secondary circuits during the continuous operation of the nuclear power plant according to the initial operating conditions and other condition information input in the simulation host operation interface. The parameter and status values ​​calculated by this module will be sent to the safety-level DCS system as the verification and optimization basis of the safety-level DCS system. After calculation and judgment by the safety-level DCS system, the safety-level DCS system sends new parameter values ​​and action instructions to the thermal hydraulic module and makes corresponding changes to recalculate the operating parameters.

[0104] The control system module is used to perform operation control and operation protection of the thermal hydraulic and point reactor dynamics models during the simulation calculation process, and to adjust parameters during the switching of operating conditions.

[0105] The interface display module is used to provide dynamic display of operation simulation data results, equipment status display and alarm signal display, control logic display, equipment trigger switch operation interface, power plant process system flow chart, dynamic operation curve chart.

[0106] The data interaction module is used to realize data exchange between the thermal hydraulic and point reactor dynamics models, the control system module, and the interface display module.

[0107] The interface system comprises:

[0108] The data transmission part of the interface system connected to the safety-level DCS system is used to transmit the simulation host operation data and equipment status signals to the safety-level DCS system, and transmit the parameter values ​​and action instructions calculated and judged by the safety-level DCS system to the simulation host through the interface system. The first two steps realize the complete closed-loop interaction process between the simulation host and the safety-level DCS system.

[0109] The simulation function part of the interface system connected to the safety-level DCS system is used to realize the functions of starting, loading, stepping, freezing, stopping, saving working conditions, loading working conditions, etc. during the use of the simulation host, and provide assistance functions for the simulation host in the process of verifying and optimizing the safety-level DCS system.

[0110] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for verification and optimization of a safety-level DCS system, characterized in that: include: S1. Generate safety-level DCS system operating parameters using nuclear power simulation; Specifically include step: The thermal hydraulic and point reactor dynamics models are used to simulate the operating parameters of the primary and secondary circuit systems and equipment during the continuous operation of the nuclear power plant, and the operating parameters of the safety-level DCS system are generated; S2. The operating parameters of the safety-level DCS system are transmitted to the safety-level DCS system, so that the safety-level DCS system operates the operating parameters of the safety-level DCS system for verification and optimization; S3. Receive the dynamic adjustment control instruction for adjusting the operating parameters of the safety-level DCS system generated by the safety-level DCS system running the operating parameters of the safety-level DCS system, so that the simulation host generates new safety-level DCS system operating parameters according to the dynamic adjustment control instruction and returns to S2 until the safety-level DCS system verification optimization is completed; The specific steps include: Receive new parameter values ​​and action instructions generated by the safety-level DCS system running the safety-level DCS system operating parameters, so that the simulation host adjusts the parameters of the thermal hydraulic and point reactor dynamics models according to the new parameter values ​​and action instructions to generate new safety-level DCS system operating parameters and returns to S2 until the safety-level DCS system verification optimization is completed; The thermal hydraulic and point reactor dynamics model is used to simulate the operating parameters and states of the primary and secondary circuit systems and equipment during the continuous operation of the nuclear power plant according to the initial operating condition information input through the simulation host operation interface; the calculated parameter and state values ​​are sent to the safety-level DCS system as the verification and optimization basis of the safety-level DCS system; after the safety-level DCS system calculates and judges, the safety-level DCS system sends new parameter values ​​and action instructions to the thermal hydraulic module and makes corresponding changes to recalculate the operating parameters; The simulation host is used to calculate the continuous operation process of the simulated nuclear power plant according to the initial operating condition information input by the user, and transmit the obtained operating parameters to the safety-level DCS system for verification and debugging; The simulation host is also used to receive dynamic adjustment control instructions from the safety-level DCS system based on operating parameters, make dynamic adjustments, recalculate operating parameters, and execute the process cyclically; The thermal hydraulic and point reactor dynamics model includes mathematical models used in the primary and secondary circuit systems and equipment of a nuclear power plant, and simulates the production and operation process of process system equipment related to the safety-level DCS system of a pressurized water reactor nuclear power plant; The simulation range of the simulation host covers normal operating conditions from hot standby to full power operation, as well as accident conditions of water loss due to a small break in the primary main pipeline and accident conditions of main steam pipeline rupture.

2. A system for verification and optimization of safety-level DCS system, characterized in that: For implementing the method for verification and optimization of a safety-level DCS system as described in claim 1, the system comprises: A parameter generation unit, used to generate safety-level DCS system operating parameters using nuclear power simulation; A verification and optimization unit, used for transmitting the operating parameters of the safety-level DCS system to the safety-level DCS system, so that the safety-level DCS system operates the operating parameters of the safety-level DCS system for verification and optimization; a receiving unit, configured to receive a dynamic adjustment control instruction for adjusting the operating parameters of the safety-level DCS system generated by the safety-level DCS system running the operating parameters of the safety-level DCS system; and The loop optimization unit is used to generate new safety-level DCS system operating parameters according to the dynamic adjustment control instruction and return to the verification optimization unit until the safety-level DCS system verification optimization is completed.

3. The system for verification and optimization of safety-level DCS system according to claim 2, characterized in that: The parameter generation unit is also used to simulate the operating parameters of each system and equipment of the primary and secondary circuits during the continuous operation of the nuclear power plant by using the thermal hydraulic and point reactor dynamics models, and generate the operating parameters of the safety-level DCS system.

4. A system for verification and optimization of safety-level DCS system, characterized in that: For implementing the method for verification and optimization of a safety-level DCS system as described in claim 1, the system comprises: A simulation host is used to generate safety-level DCS system operating parameters by adopting thermal hydraulic and point reactor dynamics model nuclear power simulation, and is used to transmit the safety-level DCS system operating parameters to the safety-level DCS system, so that the safety-level DCS system runs the safety-level DCS system operating parameters for verification and optimization; is used to receive dynamic adjustment control instructions for adjusting the safety-level DCS system operating parameters generated by the safety-level DCS system running the safety-level DCS system operating parameters, so that the simulation host generates new safety-level DCS system operating parameters by adopting nuclear power simulation according to the dynamic adjustment control instructions, so that the safety-level DCS system runs the new safety-level DCS system operating parameters for verification and optimization; and a control system module is used to control and operate the nuclear power simulation process and to control the simulation host to adjust the parameters of the thermal hydraulic and point reactor dynamics models.

5. The system for verification and optimization of a safety-level DCS system as claimed in claim 4, characterized in that: Also includes: The interface display module is used to display nuclear power simulation data, equipment status and alarm signals.

6. The system for verification and optimization of a safety-level DCS system as claimed in claim 5, characterized in that: Also includes: The data interaction module is used to realize data exchange between the thermal hydraulic and point reactor dynamics models, the control system module, and the interface display module.

7. The system for verification and optimization of a safety-level DCS system as claimed in claim 4, characterized in that: Also included is an interface system; the interface system includes: The data transmission part of the interface system connected to the safety-level DCS system is used to transmit the simulation host operation data and equipment status signals to the safety-level DCS system or / and transmit the dynamic adjustment control instructions generated by the safety-level DCS system operation parameters to the simulation host for adjusting the safety-level DCS system operation parameters.

8. The system for verification and optimization of a safety-level DCS system as claimed in claim 7, characterized in that: The interface system comprises: The simulation function part of the interface system connected to the safety-level DCS system is used to realize the start, loading, stepping, freezing, stopping, saving working conditions and / or loading working conditions during the use of the simulation host.

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