Control method and product of nuclear power unit

Abstract

The invention provides a nuclear power unit control method and product, the method is applied to a sequence control system, the sequence control system is in communication connection with a field control station of a distributed control system, the field control station is used for controlling nuclear power equipment of a nuclear power unit, and the method comprises the steps of displaying a sequence control interface, the sequence control interface comprises a flow chart of a sequence control process of the nuclear power unit from a cold shutdown working condition to a hot shutdown working condition and a first starting control; in response to the touch operation of the first starting control, under the condition that the nuclear power unit is in the cold shutdown working condition, controlling the nuclear power unit to execute a plurality of step sequences according to the execution sequence through the field control station; and in response to the completion of the execution of the last step sequence in the plurality of step sequences, outputting the information of completing the sequence control process under the condition that the nuclear power unit reaches the thermal shutdown working condition. On the basis of not influencing the original control function of the distributed control system on the nuclear power unit, the efficiency and safety of controlling the nuclear power unit from the cold shutdown working condition to the hot shutdown working condition can be improved.

Description

Technical Field

[0001] The present application relates to the field of nuclear technology, and in particular to a control method and product for a nuclear power unit. Background Art

[0002] Nuclear power units have large capacity and many parameters, and the control process of nuclear power units is very complicated, especially the process of controlling nuclear power units from cold shutdown conditions to hot shutdown conditions. The programs involved reach thousands of pages.

[0003] At present, most of the nuclear power units are manually operated by operators step by step to change from cold shutdown to hot shutdown. A large number of manual operations reduce the efficiency of controlling the nuclear power units from cold shutdown to hot shutdown, and there is a high risk of human error, which reduces the safety of controlling the nuclear power units from cold shutdown to hot shutdown.

[0004] How to improve the efficiency and safety of controlling nuclear power units from cold shutdown conditions to hot shutdown conditions has become an urgent problem to be solved. Summary of the invention

[0005] The main purpose of the embodiments of the present application is to propose a control method and product for a nuclear power unit, aiming to improve the efficiency and safety of controlling the nuclear power unit from a cold shutdown condition to a hot shutdown condition.

[0006] The present application provides a control method for a nuclear power unit, which is applied to a sequential control system in a distributed control system, wherein the sequential control system is communicatively connected to a field control station in the distributed control system, and the field control station is used to control nuclear power equipment of the nuclear power unit; the method comprises: displaying a sequential control interface, wherein the sequential control interface comprises a flow chart of a sequential control process of changing the nuclear power unit from a cold shutdown condition to a hot shutdown condition and a first start control; the flow chart comprises a plurality of steps and an execution order of the plurality of steps; in response to a touch operation of the first start control, when the nuclear power unit is in a cold shutdown condition, controlling the nuclear power unit to execute the plurality of steps according to the execution order through the field control station; in response to completion of execution of the last step of the plurality of steps, when the nuclear power unit reaches the hot shutdown condition, outputting information on completion of the sequential control process.

[0007] In one embodiment, the controlling of the nuclear power unit to execute the multiple steps in accordance with the execution order includes: before controlling the nuclear power unit to execute the i-th step of the multiple steps in accordance with the execution order, obtaining the execution condition of the i-th step; i is a positive integer; when the i-th step satisfies the execution condition, controlling the nuclear power unit to execute the i-th step; when the i-th step fails to execute or the execution time of the i-th step is greater than a first preset time, interrupting the sequential control process and generating a first prompt message to facilitate the operator to troubleshoot the fault; wherein the execution condition includes: the value of the operating condition parameter related to the i-th step is within a preset range, and no skip instruction corresponding to the i-th step and no interrupt instruction of the sequential control process are detected; when i is greater than 1, the execution condition also includes: the i-1-th step is completed or the i-1-th step is skipped.

[0008] In one embodiment, the sequential control interface also includes a second start control for a breakpoint step; the breakpoint step is a step among the multiple steps that requires manual intervention; controlling the nuclear power unit to execute the multiple steps in the execution order includes: before controlling the nuclear power unit to execute the i-th step of the multiple steps in the execution order, obtaining attribute information of the i-th step; i is a positive integer; when the attribute information of the i-th step indicates that the i-th step is a breakpoint step, detecting the touch state of the second start control; when the touch state is that touch is detected, controlling the nuclear power unit to execute the i-th step.

[0009] In one embodiment, the controlling of the nuclear power unit to execute the multiple steps in accordance with the execution order includes: when controlling the nuclear power unit to execute the i-th step of the multiple steps in accordance with the execution order, controlling the first nuclear power equipment to execute a first action; the first nuclear power equipment is the nuclear power equipment related to the i-th step in the nuclear power unit; the first action is the action related to the first nuclear power equipment in the i-th step; i is a positive integer; in response to the first nuclear power equipment executing the first action, controlling the second nuclear power equipment to execute a second action, and / or prohibiting the third nuclear power equipment from executing a third action; the second nuclear power equipment is a nuclear power equipment that has a linkage relationship with the first nuclear power equipment; the third nuclear power equipment is a nuclear power equipment that has an interference relationship with the first nuclear power equipment.

[0010] In one embodiment, the distributed control system also includes a protection system, and the priority of the protection system is higher than the priority of the sequential control system; the controlling the nuclear power unit to execute the multiple steps in accordance with the execution order includes: before controlling the nuclear power unit to execute the i-th step of the multiple steps in accordance with the execution order, detecting the target execution instruction of the protection system to the first nuclear power equipment; when the target execution instruction is detected, determining the conflict between the fourth action corresponding to the target execution instruction and the first action; the first action is the action that needs to be controlled to be executed by the first nuclear power equipment when controlling the nuclear power unit to execute the i-th step; i is a positive integer; when the conflict situation is that there is a conflict between the first action and the fourth action, the nuclear power unit is prohibited from executing the i-th step.

[0011] In one embodiment, the control method further includes: when it is detected that the execution of the i-th step is completed, adding 1 to the statistical number displayed in the sequential control interface; the statistical number is the total number of steps currently executed and completed in the sequential control process; the total number of the multiple steps is also displayed in the sequential control interface; when it is detected that the execution result of the i-th step is execution failure, and / or the execution time of the i-th step is greater than a second preset time, setting the display state of the first status light of the sequential control interface to the first display state; the first status light is the status light corresponding to the i-th step; when it is detected that the execution result of the i-th step is execution success and the execution time of the i-th step is less than or equal to the second preset time, setting the display state of the first status light to the second display state; in response to the selection operation of the i-th step, displaying second prompt information related to the i-th step in the sequential control interface; the second prompt information includes at least one of the execution time, execution conditions, and the value of the target operating condition parameter of the i-th step.

[0012] The present application also provides a sequential control system for a nuclear power unit, wherein the sequential control system is arranged in a distributed control system, and the sequential control system is communicatively connected with a field control station in the distributed control system, and the field control station is used to control the nuclear power equipment of the nuclear power unit; the sequential control system comprises: a display module, a control module and an output module; the display module is used to display a sequential control interface, and the sequential control interface comprises a flow chart of a sequential control process of the nuclear power unit from a cold shutdown condition to a hot shutdown condition and a first start control; the flow chart comprises a plurality of steps and an execution order of the plurality of steps; the control module responds to a touch operation of the first start control, and when the nuclear power unit is in a cold shutdown condition, controls the nuclear power unit to execute the plurality of steps according to the execution order through the field control station; the output module is used to respond to the completion of the execution of the last step among the plurality of steps, and when the nuclear power unit reaches the hot shutdown condition, outputs information on the completion of the sequential control process.

[0013] The present application also provides an electronic device, which includes a memory and a processor, wherein the memory stores a computer program, and the processor implements the above control method when executing the computer program.

[0014] The present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program implements the above control method when executed by a processor.

[0015] The present application also provides a computer program product, which is stored in a storage medium and implements the above control method when the computer program product is executed by at least one processor.

[0016] The present application provides a control method and product for a nuclear power unit. The sequential control system responds to the touch operation of the first start control on the sequential control interface. When the nuclear power unit is in a cold shutdown condition, the field control station controls the nuclear power unit to execute multiple steps in accordance with the execution sequence. The sequential control process of the nuclear power unit from the cold shutdown condition to the hot shutdown condition can be realized through the communication connection between the sequential control system and the field control station without affecting the original control function of the distributed control system on the nuclear power unit, thereby improving the efficiency and safety of controlling the nuclear power unit from the cold shutdown condition to the hot shutdown condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a flow chart of a control method for a nuclear power unit provided in an embodiment of the present application;

[0018] Figure 2 It is a schematic diagram of the architecture of the sequential control system of a nuclear power unit provided in an embodiment of the present application;

[0019] Figure 3 It is a specific flow chart of the control method of a nuclear power unit provided in an embodiment of the present application;

[0020] Figure 4 It is a schematic diagram of the architecture of a distributed control system provided in an embodiment of the present application;

[0021] Figure 5 It is a structural schematic diagram of a sequential control system of a nuclear power unit provided in an embodiment of the present application;

[0022] Figure 6 It is a schematic diagram of the structure of an embodiment of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0024] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0025] The control method of a nuclear power unit provided in the embodiment of the present application can be applied to an electronic device or software of an electronic device, and the electronic device can be a terminal or a server. In some embodiments, the terminal can be a laptop computer, a desktop computer, etc.; the server can be configured as an independent physical server, or a server cluster or a distributed system composed of multiple physical servers; the software can be an application for implementing the control method of a nuclear power unit, etc., but is not limited to the above forms.

[0026] The control method of the nuclear power unit provided in the embodiment of the present application is described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0027] The present application embodiment provides a control method for a nuclear power unit, which is applied to a sequential control system in a distributed control system. The sequential control system is connected to a field control station in the distributed control system in a communication manner. The field control station is used to control the nuclear power equipment of the nuclear power unit. Figure 1 A control method for a nuclear power unit provided in an embodiment of the present application may include:

[0028] Step S101: displaying a sequence control interface, the sequence control interface including a flow chart of a sequence control process of changing a nuclear power unit from a cold shutdown condition to a hot shutdown condition and a first start control; the flow chart includes a plurality of steps and an execution order of the plurality of steps;

[0029] Step S102: in response to the touch operation of the first start control, when the nuclear power unit is in a cold shutdown condition, the field control station controls the nuclear power unit to execute a plurality of steps in an execution order;

[0030] Step S103: in response to the completion of the execution of the last step in the plurality of steps, when the nuclear power unit reaches a hot shutdown condition, outputting information on the completion of the sequential control process.

[0031] A control method for a nuclear power unit provided in an embodiment of the present application responds to a touch operation of a first start control on a sequential control interface through a sequential control system. When the nuclear power unit is in a cold shutdown condition, the nuclear power unit is controlled by a field control station to execute a plurality of steps in accordance with an execution sequence. The method can realize a sequential control process of the nuclear power unit from a cold shutdown condition to a hot shutdown condition through a communication connection between the sequential control system and the field control station without affecting the original control function of the distributed control system on the nuclear power unit, thereby improving the efficiency and safety of controlling the nuclear power unit from a cold shutdown condition to a hot shutdown condition.

[0032] Optionally, when the main pump is shut down, the water in the primary circuit is solid and the chemical and volume control system's downflow regulating valve controls the primary circuit pressure, it can be determined that the nuclear power unit is in a cold shutdown condition; when the primary circuit is full of water, the core pressurizer is dual-phase and the core pressurizer controls the primary circuit pressure, it can be determined that the nuclear power unit is in a hot shutdown condition.

[0033] In actual implementation, the operator can determine whether the nuclear power unit is in a cold shutdown condition. When the operator confirms that the nuclear power unit is in a cold shutdown condition, the operator can start the sequence control process by touching the first start control. In addition, when receiving the touch operation of the first start control, the sequence control system can further verify whether the nuclear power unit is in a cold shutdown condition to ensure the accuracy of the start sequence control process.

[0034] In one embodiment, the control of the nuclear power plant in step S102 executes a plurality of steps in an execution order, including:

[0035] Before controlling the nuclear power unit to execute the i-th step of the plurality of steps in the execution order, obtaining the execution condition of the i-th step; i is a positive integer;

[0036] When the i-th step sequence meets the execution condition, the nuclear power unit is controlled to execute the i-th step sequence;

[0037] When the execution of the i-th step fails or the execution time of the i-th step is longer than the first preset time, the sequential control process is interrupted and a first prompt message is generated to facilitate the operator to troubleshoot the fault;

[0038] The execution conditions include: the value of the operating condition parameter related to the i-th step is within a preset range, and no skip instruction corresponding to the i-th step and no interrupt instruction of the sequential control process are detected;

[0039] When i is greater than 1, the execution condition also includes: the i-1th step is completed or the i-1th step is skipped.

[0040] Specifically, when i is greater than 1, before controlling the nuclear power unit to execute the i-th step, it is necessary to determine whether the i-th step meets the execution conditions. If it is obtained that the i-1th step is completed or the i-1th step is skipped, and the value of the operating condition parameter related to the i-th step is within the preset range, and the skip instruction corresponding to the i-th step and the interrupt instruction of the sequential control process are not detected, then it can be determined that the i-th step meets the execution conditions. Among them, the completion of the i-1th step can be determined by detecting the execution instruction of the i-1th step and the feedback signal that the i-1th step has been completed. In addition, the failure to detect the interrupt instruction of the sequential control process can indicate that when the i-1th step is not skipped, the i-1th step is executed successfully and the execution time of the i-1th step is less than or equal to the first preset time, and it can also indicate that no instruction to manually interrupt the sequential control process has been received.

[0041] The embodiment of the present application can improve the accuracy of controlling the nuclear power unit to execute each step by obtaining the execution condition of the step before controlling the nuclear power unit to execute each step, and controlling the nuclear power unit to execute the step when the step meets the execution condition. In addition, an alarm control logic is designed for each step. When any step fails to execute or the execution time of any step is greater than a first preset time, the sequential control process is interrupted and the first prompt information of the step is generated. The first prompt information can be at least one of an alarm prompt sound and an alarm prompt light to remind the operator to check the fault, thereby improving the efficiency and safety of controlling the nuclear power unit from a cold shutdown condition to a hot shutdown condition.

[0042] Optionally, the above-mentioned sequential control interface also includes a second start control and a confirmation completion control of the breakpoint step, and the above-mentioned breakpoint step is a step among multiple steps that requires manual intervention.

[0043] In one embodiment, the control of the nuclear power plant in step S102 executes a plurality of steps in an execution order, including:

[0044] Before controlling a nuclear power unit to execute an i-th step of a plurality of steps in an execution order, obtaining attribute information of the i-th step; i is a positive integer;

[0045] When the attribute information of the i-th step indicates that the i-th step is a breakpoint step, detecting a touch state of the second start control;

[0046] When the touch state is that the touch is detected, the nuclear power unit is controlled to execute the i-th step.

[0047] Specifically, the attributes of each step can be set in advance. For a step among multiple steps that requires manual intervention, the attribute of the step can be set as a breakpoint. In actual implementation, when the attribute information of the i-th step is obtained that the attribute of the i-th step is a breakpoint, the i-th step can be determined as a breakpoint step.

[0048] Each breakpoint step requires manual start and manual confirmation. In actual implementation, when the second start control of the breakpoint step is detected to be touched, the nuclear power unit can be controlled to execute the i-th step, and when the confirmation completion control of the endpoint step is detected to be touched, it can be determined that the i-th step is completed. Exemplarily, when the i-th step is a breakpoint step, operator A can determine whether the i-th step meets the execution condition, and when it is determined that the i-th step meets the execution condition, touch the second start control of the i-th step in the sequence control interface, and then notify operator B to execute the i-th step. When operator B completes the i-th step and operator A confirms that the i-th step is completed, operator A touches the confirmation completion control of the i-th step in the sequence control interface, and the i-th step is completed.

[0049] In addition, the setting of breakpoint sequences should take into account the process requirements of the actual sequential control process and be in line with the various actual operating modes of the nuclear power plant. The setting principles of breakpoint sequences may include the following: 1) operations involving operator observation or experience-based judgment; 2) operations involving determination by high-level authority personnel; 3) operations involving nuclear safety.

[0050] The embodiment of the present application can improve the accuracy of controlling the nuclear power unit to execute the breakpoint step, thereby improving the efficiency and safety of controlling the nuclear power unit from a cold shutdown condition to a hot shutdown condition, by acquiring the attribute information of the i-th step before controlling the nuclear power unit to execute the i-th step of a plurality of steps in an execution order, and controlling the nuclear power unit to execute the i-th step when the attribute information of the i-th step indicates that the i-th step is a breakpoint step and the second start control of the i-th step is touched.

[0051] In one embodiment, the control of the nuclear power plant in step S102 executes a plurality of steps in an execution order, including:

[0052] When the nuclear power unit is controlled to execute the i-th step of the plurality of steps in the execution order, the first nuclear power equipment is controlled to execute the first action; the first nuclear power equipment is the nuclear power equipment related to the i-th step in the nuclear power unit; the first action is the action related to the first nuclear power equipment in the i-th step; i is a positive integer;

[0053] In response to the first nuclear power equipment performing a first action, the second nuclear power equipment is controlled to perform a second action, and / or the third nuclear power equipment is prohibited from performing a third action; the second nuclear power equipment is a nuclear power equipment that has a linkage relationship with the first nuclear power equipment; the third nuclear power equipment is a nuclear power equipment that has an interference relationship with the first nuclear power equipment.

[0054] Specifically, the linkage relationship and interference relationship between nuclear power equipment can be set in advance. When controlling the first nuclear power equipment to perform an action, the second nuclear power equipment that has a linkage relationship with the first nuclear power equipment and the second action that the second nuclear power equipment needs to perform in linkage can be determined by querying the above-mentioned linkage relationship and the above-mentioned interference relationship, and the second nuclear power equipment can be controlled to perform the second action (i.e., interlocking control), and the third nuclear power equipment that has an interference relationship with the first nuclear power equipment and the third action that the third nuclear power equipment needs to be prohibited from performing can be determined, and the third nuclear power equipment can be prohibited from performing the third action (i.e., locking control).

[0055] The embodiment of the present application realizes interlocking control and / or locking control of nuclear power equipment during sequential control by controlling the second nuclear power equipment to perform the second action and / or prohibiting the third nuclear power equipment from performing the third action while controlling the first nuclear power equipment to perform the first action, thereby improving the efficiency and safety of controlling the nuclear power unit from a cold shutdown condition to a hot shutdown condition.

[0056] Optionally, the distributed control system further includes a protection system, and the priority of the protection system is higher than the priority of the sequential control system.

[0057] In one embodiment, the control of the nuclear power plant in step S102 executes a plurality of steps in an execution order, including:

[0058] Before controlling the nuclear power unit to execute the i-th step of the plurality of steps in the execution order, detecting the target execution instruction of the protection system on the first nuclear power equipment;

[0059] In the case where the target execution instruction is detected, determining the conflict between the fourth action corresponding to the target execution instruction and the first action; the first action is the action that needs to be controlled to be executed by the first nuclear power equipment when the nuclear power unit is controlled to execute the i-th step sequence; i is a positive integer;

[0060] When the conflict situation is that there is a conflict between the first action and the fourth action, the nuclear power unit is prohibited from executing the i-th step sequence.

[0061] Specifically, for the same nuclear power equipment, the control instructions triggered by the protection system and the control instructions triggered by the sequential control system are sometimes different. For example, the control instruction triggered by the sequential control system is to start the nuclear power equipment, but the control instruction triggered by the protection system is to shut down the nuclear power equipment. In the event of a conflict between the two, the control instruction triggered by the protection system shall be executed first.

[0062] In actual implementation, before executing the i-th step, it can be detected whether the protection system has triggered the target execution instruction for the first nuclear power equipment, and when the target execution instruction of the protection system is detected, it is further determined whether there is a conflict between the fourth action corresponding to the target execution instruction and the first action of the first nuclear power equipment corresponding to the i-th step. If there is a conflict between the two, the first nuclear power equipment is prohibited from executing the i-th step, that is, the first nuclear power equipment only executes the target execution instruction; if the target execution instruction of the protection system is not detected, the first nuclear power unit is controlled to execute the i-th step.

[0063] The embodiment of the present application prohibits the nuclear power unit from executing the i-th step by detecting the target execution instruction of the protection system to the first nuclear power equipment before controlling the nuclear power unit to execute the i-th step, and when the target execution instruction is detected and the fourth action corresponding to the target execution instruction conflicts with the first action of the first nuclear power equipment corresponding to the i-th step, the nuclear power unit is prohibited from executing the i-th step, thereby improving the safety of the nuclear power unit executing the i-th step, and further improving the safety of controlling the nuclear power unit from a cold shutdown condition to a hot shutdown condition.

[0064] The above-mentioned sequence control interface also includes an interrupt control and a skip control corresponding to each step sequence.

[0065] In one embodiment, the controlling of the nuclear power unit in step S102 to execute the multiple steps in the execution order includes:

[0066] In response to a touch operation of the interrupt control, the sequential control process is interrupted;

[0067] In response to the touch operation of the skip control corresponding to the i-th step, when i is greater than 1 and the i-1-th step is completed, the nuclear power unit is controlled to execute the i+1-th step; when i=1, the nuclear power unit is controlled to execute the i+1-th step;

[0068] The i-1th step is a step whose execution order is one step before the execution order of the i-th step in the above-mentioned multiple steps, and the i+1th step is a step whose execution order is one step after the execution order of the i-th step in the above-mentioned multiple steps.

[0069] Specifically, various situations may be encountered during the sequential control process. No matter which step is currently being executed, the operator can interrupt the sequential control process by touching the interrupt control on the sequential control interface. Furthermore, if the sequential control process is interrupted, the operator can continue the sequential control process by touching the interrupt control on the sequential control interface again.

[0070] In addition, the skip control can be used to skip a certain step or ignore the feedback signal of a certain step and start the next step. Specifically, under different operating conditions, some steps of the sequential control process may not need to be executed. The operator can skip the step and directly execute the next step by touching the skip control corresponding to a certain step. Or when a step has actually been completed, but the execution completion feedback signal of the step is not detected due to an abnormality in the signal detection device, the operator can also start the execution of the next step by touching the skip control corresponding to the step.

[0071] The embodiment of the present application sets an interrupt control in the sequential control interface, which allows the operator to flexibly interrupt / continue the sequential control process according to actual conditions. In addition, by setting skip controls corresponding to each step in the sequential control interface, the operator can flexibly select the execution step of the nuclear power unit according to different operating conditions. The operator can also flexibly handle the situation where the next step cannot be automatically started due to an abnormality in the signal detection equipment, thereby improving the flexibility of controlling the nuclear power unit from a cold shutdown condition to a hot shutdown condition.

[0072] In one embodiment, the control method provided in the embodiment of the present application further includes:

[0073] When it is detected that the execution of the i-th step is completed, the statistical number displayed in the sequence control interface is increased by 1; the statistical number is the total number of steps currently executed in the sequence control process; the sequence control interface also displays the total number of multiple steps of the sequence control process;

[0074] When it is detected that the execution result of the i-th step is execution failure, and / or the execution time of the i-th step is greater than the second preset time, the display state of the first status light of the sequence control interface is set to the first display state; the first status light is the status light corresponding to the i-th step;

[0075] When it is detected that the execution result of the i-th step is successful and the execution time of the i-th step is less than or equal to the second preset time, setting the display state of the first status light to the second display state;

[0076] In response to the selection operation of the i-th step, second prompt information related to the i-th step is displayed in the sequence control interface; the second prompt information includes at least one of the execution time, execution conditions, and value of the target operating condition parameter of the i-th step.

[0077] Optionally, the second preset time length may be equal to or different from the first preset time length.

[0078] Optionally, the display state includes at least one of display color and flashing frequency. Setting the display state of the first status light of the sequential control interface to the first display state may include: setting the color of the first status light to red, and setting the flashing frequency of the first status light to at least one of the first frequencies. Setting the display state of the first status light of the sequential control interface to the second display state may include: setting the color of the first status light to green, and setting the flashing frequency of the first status light to at least one of the second frequencies. Optionally, the first frequency is higher than the second frequency.

[0079] Optionally, the operator can click on the i-th step to open the information window of the i-th step, in which at least one of the execution time, execution conditions, and value of the target operating condition parameter of the i-th step can be displayed. The target operating condition parameter can be a preset key monitoring parameter of the i-th step.

[0080] The embodiment of the present application can improve the interactivity of the sequential control process of changing a nuclear power unit from a cold shutdown condition to a hot shutdown condition by displaying on a sequential control interface a flow chart of the sequential control process of changing a nuclear power unit from a cold shutdown condition to a hot shutdown condition, the total number of multiple steps in the sequential control process and the total number of steps currently executed, and displaying the execution status of each step through a status light on the sequential control interface and displaying prompt information related to the i-th step in the sequential control interface in response to a selection operation on the i-th step, thereby improving the user experience.

[0081] Optionally, the above-mentioned multiple steps include the step of starting the main pump, the step of chemically adjusting the water in the first circuit, the step of establishing the steam chamber with the pressurizer, the step of closing the spray valve, the step of preparing for starting the second circuit, the step of exiting the cold shutdown mode, and the step of increasing the temperature and pressure to the hot shutdown mode.

[0082] See also Figure 2The overall architecture of the sequential control system provided in the embodiment of the present application includes three levels: functional group control level, functional subgroup control level and equipment control level. Among them, the control level of the functional group control level is the highest, which is mainly used to control the start and stop of the sequential control process, and can complete the control process of the nuclear power unit from the cold shutdown condition to the hot shutdown condition with minimal human intervention. The control level of the functional subgroup control level is lower than the functional group control level, including the various systems of the nuclear power unit involved in the process of changing the nuclear power unit from the cold shutdown condition to the hot shutdown condition, such as the nuclear sampling system, ventilation system, chemical and volume control system, etc., which receive the control instructions of the functional group control level, and send the control instructions of the nuclear power equipment to the equipment control level, so as to realize the start and stop control function of each system of the nuclear power unit. The control level of the equipment control level is lower than the functional subgroup control level, and the control instructions of the nuclear power equipment sent by the functional subgroup control level are received, and the control instructions of the nuclear power equipment are sent to the field control station, so as to realize the control of the nuclear power equipment through the field control station.

[0083] Please combine Figure 2 and Figure 3 , when the sequential control system is started, the functional group control level can control the sequential control interface display. Then, when the nuclear power unit is in a cold shutdown condition, the functional group control level can respond to the touch operation of the first start control, start the sequential control process that changes the nuclear power unit from a cold shutdown condition to a hot shutdown condition, and send the start signal of the sequential control process to the functional subgroup control level. The functional subgroup control level can respond to the start signal of the sequential control process to start the main step 1, and first send an instruction to the equipment control level to control the nuclear power unit to execute the sub-step of starting the main pump. The equipment control level responds to the instruction and controls the nuclear power unit to execute the step of starting the main pump through the field control station to control the start of the main pump. When the sub-step of starting the main pump is executed, the equipment control level In the case of completion, the equipment control level feeds back a signal that the sub-step sequence of starting the main pump is completed to the functional sub-group control level. In response to the signal that the sub-step sequence of starting the main pump is completed, the functional sub-group control level then sends an instruction to the equipment control level to control the nuclear power unit to execute the sub-step sequence of primary water chemical regulation. In response to the instruction, the equipment control level controls the nuclear power unit to execute the sub-step sequence of primary water chemical regulation through the field control station, and performs chemical regulation with primary water. In the case of completion of the sub-step sequence of primary water chemical regulation, the equipment control level feeds back a signal that the sub-step sequence of primary water chemical regulation is completed to the functional sub-group control level. The functional sub-group control level can generate a signal that the main step 1 is executed in response to the signal that the sub-step sequence of primary water chemical regulation is executed, and then start the main step 2.

[0084] Main step 2 includes the sub-step of the pressurizer establishing the steam chamber and the sub-step of closing the spray valve, main step 3 includes the sub-step of the secondary loop startup preparation, and main step 4 includes the sub-step of exiting the cold shutdown mode and the sub-step of increasing the temperature and pressure to the hot shutdown mode. The specific control process of main step 2, main step 3, and main step 4 can refer to the specific control process of main step 1, which will not be repeated here. Until the functional subgroup control level generates a signal that the main step 4 is executed, and sends the signal that the main step 4 is executed to the functional group control level, the functional group control level responds to the signal that the main step 4 is executed, and when the nuclear power unit is in the hot shutdown condition, stops the sequential control process and outputs the information that the sequential control process is completed.

[0085] In the embodiment of the present application, the sequential control system responds to the touch operation of the first start control on the sequential control interface. When the nuclear power unit is in a cold shutdown condition, the field control station controls the nuclear power unit to execute multiple steps in accordance with the execution order, and the sequential control system responds to the completion of the last step of the multiple steps. When the nuclear power unit reaches a hot shutdown condition, the sequential control process is output. The automation level of the process from the cold shutdown condition to the hot shutdown condition of the nuclear power unit can be improved, thereby greatly reducing the manual operation task volume of the process, as well as the operator's burden, input quantity and operation number, and can reduce the risk of human error; it can also reduce digital operation orders, streamline the operation management procedures of the process from the cold shutdown condition to the hot shutdown condition of the nuclear power unit, and provide support for the "fewer people on duty" of the nuclear power plant; it can also reduce the number of operating switches and buttons for the process from the cold shutdown condition to the hot shutdown condition of the nuclear power unit, and reduce the size of the control panel; in addition, it can also shorten the startup time of the nuclear power unit and reduce the operating cost of the nuclear power unit.

[0086] See also Figure 4The embodiment of the present application also provides a distributed control system (DCS), including a process system interface layer (LEVEL 0), a process processing and protection layer (LEVEL 1), an operation and information management layer (LEVEL 2) and a whole plant technical management layer (LEVEL 3), wherein LEVEL 0 is used to connect nuclear power equipment; LEVEL 1 includes a field control station and a sequential control station, the sequential control station is communicated with the field control station, and the field control station can control the nuclear power equipment through the process system interface; LEVEL 2 includes a real-time server, a history server and a computing server, wherein the real-time server can be used to receive and store data collected from LEVEL 1 in real time and for a short period of time, and provide real-time data services for clients such as operator stations of LEVEL 3, the history server can be used to receive all alarms and log information from the real-time server, and store historical data for query, and the computing server can be used to perform data calculation and processing; LEVEL 3 includes an engineer station, an operator station (also called an operator station), a gateway, a process system screen and a sequential control screen, which are used to interact with different roles such as engineers and operators.

[0087] DCS has the functions of monitoring, controlling and protecting the operation of nuclear power plants. According to the safety classification, it can be divided into safety-level DCS and non-safety-level DCS. The sequential control system is an auxiliary system, and its software platform relies on the non-safety-level DCS, with a lower priority than the safety-level DCS. The sequential control system has a pair of redundant controllers, which only communicate data with the field control station and have no direct data input and output connection with the nuclear power equipment. When the sequential control system fails, the sequential control system can be cut off without affecting the original control logic of the distributed control system for the nuclear power equipment.

[0088] When the sequential control system is started, the sequential control system can control the display of the sequential control screen of LEVEL 3, and can respond to the touch operation of the first start control of the sequential control screen. When the nuclear power unit is in a cold shutdown condition, the nuclear power unit can be controlled by the field control station to execute multiple steps in an execution order, and can respond to the completion of the execution of the last step of the multiple steps. When the nuclear power unit reaches a hot shutdown condition, the information of completing the sequential control process is output.

[0089] See also Figure 5 The embodiment of the present application also provides a sequential control system for a nuclear power unit. The sequential control system is arranged in a distributed control system. The sequential control system is connected to a field control station in the distributed control system in a communication manner. The field control station is used to control the nuclear power equipment of the nuclear power unit. The sequential control system includes: a display module, a control module and an output module.

[0090] The display module is used to display a sequential control interface, which includes a flow chart of a sequential control process of changing a nuclear power unit from a cold shutdown condition to a hot shutdown condition and a first start control; the flow chart includes a plurality of steps and an execution order of the plurality of steps;

[0091] The control module responds to the touch operation of the first start control, and when the nuclear power unit is in a cold shutdown condition, controls the nuclear power unit to execute a plurality of steps in an execution order through a field control station;

[0092] The output module is used to output information on the completion of the sequence control process in response to the completion of the execution of the last step in the multiple steps and when the nuclear power unit reaches a thermal shutdown condition.

[0093] The control system of the nuclear power unit provided in the embodiment of the present application can implement each step of the control method embodiment of the above-mentioned nuclear power unit and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0094] Optionally, an embodiment of the present application further provides an electronic device, including a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, each step of the control method embodiment of the above-mentioned nuclear power unit is implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here. It should be noted that the electronic device in the embodiment of the present application includes the above-mentioned mobile electronic device and non-mobile electronic device.

[0095] Figure 6 A schematic diagram of the hardware structure of an electronic device for implementing an embodiment of the present application is provided, wherein the electronic device includes:

[0096] The processor 601 may be implemented by a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application;

[0097] The memory 602 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 602 can store an operating system and other application programs. When the technical solution provided in the embodiment of this specification is implemented by software or firmware, the relevant program code is stored in the memory 602, and the processor 601 calls and executes the control method of the nuclear power unit in the embodiment of the present application;

[0098] Input / output interface 603, used to implement information input and output;

[0099] Communication interface 604, used to realize communication interaction between the device and other devices, and communication can be realized through wired means (such as USB, network cable, optical fiber, etc.);

[0100] Bus 606 , which transmits information between various components of the device (e.g., processor 601 , memory 602 , input / output interface 603 , and communication interface 604 );

[0101] The processor 601 , the memory 602 , the input / output interface 603 and the communication interface 604 are connected to each other in communication within the device via a bus 606 .

[0102] The electronic device provided in the embodiment of the present application can implement each step of the control method embodiment of the above-mentioned nuclear power unit and can achieve the same technical effect. To avoid repetition, it will not be described here.

[0103] An embodiment of the present application also provides a computer-readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various steps of the control method embodiment of the above-mentioned nuclear power unit are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0104] The processor is the processor in the electronic device described in the above embodiment. The computer-readable storage medium includes a computer-readable storage medium such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0105] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run programs or instructions to implement the various steps of the above-mentioned nuclear power unit control method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0106] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0107] An embodiment of the present application provides a computer program product, which is stored in a storage medium. The program product is executed by at least one processor to implement the various steps of the control method embodiment of the nuclear power unit as described above, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0108] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0109] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0110] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A control method for a nuclear power unit, characterized in that: A sequential control system applied to a distributed control system, wherein the sequential control system is communicatively connected with a field control station in the distributed control system, and the field control station is used to control nuclear power equipment of a nuclear power unit; The method comprises: Displaying a sequential control interface, the sequential control interface including a flow chart of a sequential control process of changing the nuclear power unit from a cold shutdown condition to a hot shutdown condition and a first start control; the flow chart includes a plurality of steps and an execution order of the plurality of steps; In response to the touch operation of the first start control, when the nuclear power unit is in a cold shutdown condition, controlling the nuclear power unit to execute the multiple steps in the execution order through the field control station; In response to the completion of the execution of the last step among the multiple steps, when the nuclear power unit reaches the thermal shutdown condition, information on the completion of the sequential control process is output.

2. The control method according to claim 1, characterized in that: The controlling the nuclear power unit to execute the multiple steps in the execution order includes: Before controlling the nuclear power unit to execute the i-th step of the plurality of steps in the execution order, obtaining an execution condition of the i-th step; i is a positive integer; When the i-th step sequence satisfies the execution condition, controlling the nuclear power unit to execute the i-th step sequence; When the execution of the i-th step fails or the execution time of the i-th step is longer than a first preset time, interrupting the sequential control process and generating a first prompt message so that an operator can troubleshoot the fault; The execution conditions include: the value of the operating condition parameter related to the i-th step is within a preset range, and no skip instruction corresponding to the i-th step and no interrupt instruction of the sequential control process are detected; When i is greater than 1, the execution condition further includes: the i-1th step is completed or the i-1th step is skipped.

3. The control method according to claim 1, characterized in that: The sequential control interface further includes a second start control of a breakpoint sequence; the breakpoint sequence is a sequence among the multiple sequences that requires manual intervention; The controlling the nuclear power unit to execute the multiple steps in the execution order includes: Before controlling the nuclear power unit to execute the i-th step of the plurality of steps in the execution order, obtaining attribute information of the i-th step; i is a positive integer; When the attribute information of the i-th step indicates that the i-th step is a breakpoint step, detecting a touch state of the second start control; When the touch state is that touch is detected, the nuclear power unit is controlled to execute the i-th step.

4. The control method according to claim 1, characterized in that: The controlling the nuclear power unit to execute the multiple steps in the execution order includes: When the nuclear power unit is controlled to execute the i-th step of the multiple steps according to the execution order, the first nuclear power equipment is controlled to execute a first action; the first nuclear power equipment is the nuclear power equipment related to the i-th step in the nuclear power unit; the first action is the action related to the first nuclear power equipment in the i-th step; i is a positive integer; In response to the first nuclear power equipment performing the first action, the second nuclear power equipment is controlled to perform the second action, and / or the third nuclear power equipment is prohibited from performing the third action; the second nuclear power equipment is a nuclear power equipment that has a linkage relationship with the first nuclear power equipment; the third nuclear power equipment is a nuclear power equipment that has an interference relationship with the first nuclear power equipment.

5. The control method according to claim 1, characterized in that: The distributed control system further comprises a protection system, wherein the priority of the protection system is higher than the priority of the sequential control system; The controlling the nuclear power unit to execute the multiple steps in the execution order includes: Before controlling the nuclear power unit to execute the i-th step of the plurality of steps in the execution order, detecting a target execution instruction of the protection system to the first nuclear power equipment; In the case where the target execution instruction is detected, determining the conflict between the fourth action corresponding to the target execution instruction and the first action; the first action is an action that needs to be controlled to be performed by the first nuclear power equipment when controlling the nuclear power unit to execute the i-th step sequence; i is a positive integer; When the conflict situation is that the first action conflicts with the fourth action, the nuclear power unit is prohibited from executing the i-th step sequence.

6. The control method according to claim 1, characterized in that: The control method further comprises: When it is detected that the i-th step is completed, the statistical number displayed in the sequence control interface is increased by 1; the statistical number is the total number of steps currently completed in the sequence control process; the sequence control interface also displays the total number of the multiple steps; When it is detected that the execution result of the i-th step is execution failure, and / or the execution time of the i-th step is greater than a second preset time, setting the display state of the first status light of the sequence control interface to the first display state; the first status light is the status light corresponding to the i-th step; When it is detected that the execution result of the i-th step is successful and the execution time of the i-th step is less than or equal to the second preset time, setting the display state of the first status light to the second display state; In response to the selection operation of the i-th step, second prompt information related to the i-th step is displayed in the sequence control interface; the second prompt information includes at least one of the execution time, execution conditions, and value of the target operating condition parameter of the i-th step.

7. A sequential control system for a nuclear power unit, characterized in that: The sequential control system is arranged in a distributed control system, the sequential control system is communicatively connected with a field control station in the distributed control system, and the field control station is used to control nuclear power equipment of a nuclear power unit; The sequential control system comprises: a display module, a control module and an output module; The display module is used to display a sequential control interface, which includes a flow chart of a sequential control process of changing the nuclear power unit from a cold shutdown condition to a hot shutdown condition and a first start control; the flow chart includes a plurality of steps and the execution order of the plurality of steps; The control module controls the nuclear power unit to execute the multiple steps in the execution order through the field control station in response to the touch operation of the first start control, when the nuclear power unit is in a cold shutdown condition; The output module is used for outputting information on completion of the sequential control process in response to the completion of the execution of the last step among the multiple steps, when the nuclear power unit reaches the thermal shutdown condition.

8. An electronic device, characterized in that: The electronic device comprises a memory and a processor, the memory stores a computer program, and the processor implements the control method according to any one of claims 1 to 6 when executing the computer program.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the control method according to any one of claims 1 to 6 is implemented.

10. A computer program product, characterized in that The computer program product is stored in a storage medium, and when the computer program product is executed by at least one processor, the control method according to any one of claims 1 to 6 is implemented.

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