CN115310786A - Unit back-up state guiding method, system, device and computer readable storage medium - Google Patents
Unit back-up state guiding method, system, device and computer readable storage medium Download PDFInfo
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
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- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 238000005271 boronizing Methods 0.000 description 1
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Abstract
The invention relates to a method, a system and a device for guiding a withdrawing state of a unit and a computer readable storage medium, wherein the method for guiding the withdrawing state of the unit comprises the following steps of S10: acquiring initial operation condition information of the unit and current state information of the nuclear steam supply system, and judging whether a withdrawing requirement condition is met or not according to the initial operation condition information of the unit and the current state information of the nuclear steam supply system; s20: when the requirement condition of withdrawal is met, acquiring the current operating condition information of the unit, and performing logic diagnosis by combining the current state information of the nuclear steam supply system to obtain a diagnosis result; s30: outputting state guide information according to the diagnosis result; according to the method, when a fault working condition or a disaster accident occurs, the guiding information of the withdrawing state which is required to ensure the safety of the unit is output, so that an operator can quickly acquire the withdrawing path of the unit according to the guiding information, and the time for the operator to process the accident information of the nuclear power plant is shortened.
Description
Technical Field
The invention relates to the field of nuclear power plant fault working condition or disaster accident handling, in particular to a method, a system and a device for guiding a unit withdrawing state and a computer readable storage medium.
Background
When a nuclear power plant has a fault condition or a disaster accident, once the fault condition or the disaster accident is confirmed to be really generated and cannot be repaired in time, an operator needs to decide the withdrawing state of the unit according to the current unit state and the affected condition of equipment so as to ensure the safety state of the reactor.
In the related technology, an operator determines the withdrawing state of a unit by adopting a manual judgment method; however, the method depends on manual operation and judgment of an operator, an optimal retraction state may not be obtained, and a large amount of information or alarm signals which are unavailable to a unit/equipment are generated during a fault working condition or a disaster accident condition, so that the workload of the operator is large, and a large human factor failure risk exists.
Disclosure of Invention
The invention provides a method, a system and a device for guiding a set withdrawing state and a computer readable storage medium.
The technical scheme adopted by the invention for solving the technical problem is as follows: a method for guiding a set withdrawing state is constructed, and the method comprises the following steps:
step S10: acquiring initial operation condition information of a unit and current state information of a nuclear steam supply system, and judging whether a withdrawing requirement condition is met or not according to the initial operation condition information of the unit and the current state information of the nuclear steam supply system;
step S20: when the requirement condition of withdrawing is met, acquiring the current operating condition information of the unit, and performing logic diagnosis by combining the current state information of the nuclear steam supply system to obtain a diagnosis result;
step S30: and outputting state guide information according to the diagnosis result.
Preferably, the step S20 includes:
step S21: taking the pullback state of the highest level as the current pullback state;
step S22: determining a withdrawing function corresponding to the current withdrawing state, judging whether the withdrawing function is available according to the current operation condition information of the unit, and if not, executing the step S27; if yes, go to step S23;
step S23: determining a risk item corresponding to the current withdrawing state, judging whether the risk item exists according to the current operation condition information of the unit, and if so, executing a step S27; if not, executing step S24;
step S24: judging whether the current withdrawing state is the withdrawing state of the lowest level, if so, executing a step S25; if not, executing step S26;
step S25: obtaining a diagnosis result which takes the current withdrawing state as a final withdrawing state;
step S26: taking the next withdrawing state of the current withdrawing state as the current withdrawing state, and executing the step S22;
step S27: judging whether the current withdrawing state is the highest withdrawing state, if so, executing a step S28; if not, executing step S29;
step S28: obtaining a diagnosis result that the highest-level withdrawal state is unavailable;
step S29: and obtaining a last pullback state of the current pullback state as a final diagnosis result of the pullback state.
Preferably, in step S30, the outputting the state guidance information includes:
and outputting the guide information which requires the unit to retreat to the final retreat state, or outputting the guide information which requires the unit to keep the current state.
Preferably, the step S30 further includes:
and outputting a judgment result of whether the fallback function is available and a judgment result of whether the risk item exists.
Preferably, in step S22, determining the fallback function corresponding to the current fallback state includes:
and determining a preset withdrawing function corresponding to the current withdrawing state according to the current withdrawing state.
Preferably, the step of acquiring the pull-back function comprises:
step S221: determining the current state of the unit and the withdrawing state of the unit to be withdrawn;
step S222: acquiring the current state condition of the unit according to the current state;
step S223: acquiring a first state condition of the unit according to the withdrawing state to be withdrawn;
step S224: and comparing the corresponding relation between the first state condition and the current state condition to obtain the required withdrawing function for changing the current state condition to the first state condition.
Preferably, the step S23 includes:
step S231: according to the current withdrawing state, combining a preset second mapping table to obtain the corresponding risk item; the second mapping table comprises a mapping relation between the withdrawing state and the risk item;
step S232: determining an isolation function for eliminating the risk items according to the obtained risk items;
step S233: judging whether the isolation function is available according to the current state information of the nuclear steam supply system; if yes, judging that the risk item does not exist, and executing the step S24; if not, judging that the risk item exists, and executing the step S27.
Preferably, the step S10 includes:
s11: collecting the initial operation condition information of the unit;
s12: according to the collected initial operation condition information, combining with a preset first mapping table, obtaining the state requirement of the nuclear steam supply system; the first mapping table comprises a mapping relation between the initial operation condition information and the state requirement of the nuclear steam supply system;
s13: collecting the current state information of the nuclear steam supply system, and judging whether the current state information of the nuclear steam supply system meets the state requirement;
if not, determining that the requirement condition of withdrawing is met;
and if so, determining that the pull-back requirement condition is not met.
Preferably, before the step S10, the method further includes:
step S09: and receiving an intervention action signal containing a fault working condition or disaster accident operation regulation requirement, and executing the step S10.
The invention also constructs a machine set withdrawing state guidance system, which comprises:
the acquisition and judgment module is used for acquiring the initial operation condition information of the unit and the current state information of the nuclear steam supply system and judging whether the requirement for withdrawing is met or not according to the initial operation condition information of the unit and the current state information of the nuclear steam supply system;
the acquisition diagnosis module is used for acquiring the current operation condition information of the unit when the requirement condition of the back-up is met; performing logic diagnosis by combining the current state information of the nuclear steam supply system to obtain a diagnosis result;
and the display module is used for outputting state guide information according to the diagnosis result.
The invention also constructs a machine set withdrawing state guiding device which comprises a processor and a memory storing a computer program, wherein the processor realizes the steps of the machine set withdrawing state guiding method when executing the computer program.
The invention also relates to a computer-readable storage medium, which stores a computer program that, when being executed by a processor, implements the steps of the method for guiding a train fallback state described above.
The implementation of the invention has the following beneficial effects: according to the unit withdrawing state guiding method, when a fault working condition or a disaster accident occurs, the guiding information of the withdrawing state which is required to be achieved by the unit safety is output, and an operator can quickly acquire the withdrawing target according to the guiding information, so that the operator can conveniently select the optimized withdrawing path. By means of the unit withdrawal state guiding method, interference of a large amount of unusable information and alarm on manual analysis of an operator under a fault working condition or a disaster accident condition and workload for processing a large amount of information can be reduced, time for the operator to process the nuclear power plant accident information is shortened, the operator has more time to focus on system configuration for controlling unit safety, and the intelligent degree and the unit safety level of a nuclear power plant are further improved.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a program flow diagram of a set pullback state guidance method of the present invention in some embodiments;
FIG. 2 is a program flow diagram of a set pullback state guidance method according to another embodiment of the present invention;
fig. 3 is a flowchart of a procedure for determining whether a fallback function is available according to the collected information of the current operating condition of the unit in the unit fallback state guidance method according to the present invention;
fig. 4 is a flowchart of a procedure for determining whether a risk item exists according to the collected information of the current operating condition of the unit in the unit pull-back state guidance method of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, it is to be understood that the orientations and positional relationships indicated by the terms "front", "rear", "upper", "lower", "left", "right", "longitudinal", "lateral", "vertical", "horizontal", "top", "bottom", "inner", "outer", "leading", "trailing", and the like are configured and operated in specific orientations based on the orientations and positional relationships shown in the drawings, and are only for convenience of description of the present technical solution, but do not indicate that the device or element referred to must have a specific orientation, and thus, cannot be construed as limiting the present invention.
It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or intervening elements may also be present. The terms "first", "second", "third", etc. are only for convenience in describing the present technical solution, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
The invention constructs a unit withdrawal state guide method, which can be applied to a nuclear power plant, and when a fault working condition or a disaster accident occurs, the method outputs the guide information of the withdrawal state which is required to be reached by ensuring the unit safety, and an operator can quickly acquire a withdrawal target according to the guide information, so that the operator can conveniently select an optimized withdrawal path. By means of the unit withdrawal state guiding method, the interference of a large amount of unusable information and alarm on the manual analysis of an operator and the workload of processing a large amount of information under the condition of a fault working condition or a disaster accident can be reduced, the time for the operator to process the accident information of the nuclear power plant is shortened, the operator has more time to focus on the system configuration for controlling the unit safety, and the intelligentization degree and the unit safety level of the nuclear power plant are further improved.
In some embodiments, as shown in fig. 1, the unit pull-back state guidance method includes the following steps:
step S10: acquiring initial operation condition information of the unit and current state information of the nuclear steam supply system, and judging whether a withdrawing requirement condition is met or not according to the initial operation condition information of the unit and the current state information of the nuclear steam supply system;
step S20: when the requirement condition of withdrawal is met, acquiring the current operating condition information of the unit, and performing logic diagnosis by combining the current state information of the nuclear steam supply system to obtain a diagnosis result;
step S30: and outputting the state guide information according to the diagnosis result.
The initial operation condition of the unit is an operation condition during the normal operation of the unit, and the operation condition of the unit includes a power operation condition, a hot standby condition, a hot shutdown condition, a steam generator cooling biphase intermediate shutdown condition, a waste heat removal system cooling intermediate shutdown condition, a normal cold shutdown condition, a maintenance cold shutdown condition and a refueling shutdown condition.
And the initial operation condition information of the unit represents the operation condition information of the unit during normal operation. The operation condition information comprises reactor power, reactivity, primary circuit average temperature, pressure and other state condition information.
The nuclear steam supply system is a general name of a series of systems used by a nuclear power plant for power generation, driving, heat supply and the like. According to the availability division, the state of each system in the nuclear steam supply system can comprise a usable state and a non-usable state; the operation state and the shutdown state can be included according to the operation state division.
In a nuclear power plant, after a fault condition or a disaster (e.g., a fire) occurs, a part of the nuclear steam supply system may be lost, and the nuclear power generating units should be withdrawn to a state where the damage of the nuclear steam supply system to the unit safety is minimized. Of course, under the condition that the fault working condition or the disaster accident is not serious or resolvable (for example, the non-important fire-prevention subarea or the fire can be extinguished), the withdrawing requirement caused by the occurrence of the fault working condition or the disaster accident can not be generated, and the intervention of the withdrawing state guide system of the unit is not needed.
Based on the operation condition information of the unit during normal operation, the state requirement of each system in the nuclear steam supply system can be determined. When a fault working condition or a disaster accident occurs, judging whether the current state information of the nuclear steam supply system meets the state requirement to be in, and if so, keeping the current state of the unit; otherwise, a withdrawing requirement is generated, and the unit needs to be controlled to be withdrawn to a corresponding withdrawing state.
When the pullback requirement is generated, considering the reason that part of the units may fail due to fault conditions or disaster accidents, it is necessary to diagnose whether the units can be pulled back to the corresponding pullback state. Meanwhile, when the machine set cannot be pulled back to the optimal pulling back state, the most appropriate pulling back state is found through logic diagnosis, so that the damage of the machine set is reduced to the minimum.
According to the invention, a plurality of withdrawing states can be preset according to the past fault working conditions or disaster accidents of the nuclear power unit, so that the optimal withdrawing state can be found when the unit generates withdrawing requirements.
In some embodiments, X pullback states are preset, where X is a positive integer; there may be divided into a highest level pullback state, a lowest level pullback state, and one or more pullback states arranged between the highest level pullback state and the lowest level pullback state. And each withdrawing state has the same property with the initial operation condition information of the unit, and comprises various state conditions such as reactor power, reactivity, primary circuit average temperature and pressure and the like. In some embodiments, the X pullback states are ordered according to the level of a physical parameter, such as a temperature parameter, a pressure parameter; when the physical parameter is higher, the more the physical parameter is close to the highest-level back-pull; conversely, as the physical parameter is lower, the fallback state is closer to the lowest level. Referring to FIG. 2, the pullback state N is represented in
One of the X pullback states is a pullback state, wherein N is a positive integer and is more than or equal to 1 and less than or equal to X.
After determining the final pull-back state, state guidance information may be output that guides the operator through execution. The operator can quickly control the unit to retract to a relatively optimal retraction state after receiving the guiding information. Of course, when the fault condition or the disaster accident is too serious, the unit cannot enter the withdrawing state, and at the moment, the guiding information guides the operator to keep the current state so as to wait for other workers to repair the fault condition or solve the disaster accident.
In some embodiments, referring to fig. 2, in step S10, the following steps are included:
step S11: acquiring initial operation condition information of a unit;
step S12: according to the collected initial operation condition information, combining with a preset first mapping table, obtaining the state requirement of the nuclear steam supply system; the first mapping table comprises a mapping relation between initial operation condition information and the state requirement of the nuclear steam supply system;
step S13: acquiring the current state information of the nuclear steam supply system, and judging whether the current state information of the nuclear steam supply system meets the state requirement;
if not, determining that the requirement condition of withdrawing is met;
and if so, determining that the pull-back requirement condition is not met.
It is understood that the first mapping table may be prepared in advance according to the nuclear power plant operation specification, and includes a mapping relationship between the operation condition of the unit and the state of the nuclear steam supply system. When the operation condition information (state conditions such as reactor power, reactivity, primary circuit average temperature and pressure) is collected, which kind of working condition the unit is under can be determined; and combining the first mapping table to obtain the system state requirement of the nuclear steam supply system.
The system state of the nuclear steam supply system may be divided into two switching values of usable and unusable, or may be divided into two switching values of operation and shutdown, and which of the nuclear steam supply systems is required by the plant unit to be in a usable state may be known according to the system state requirements of the nuclear steam supply system. When a fault working condition or a disaster accident occurs, by acquiring the current state information of the nuclear steam supply system, which systems can be used and which systems can not be used under the current condition can be known. By comparing the current state information with the system state requirement, whether the current state of the nuclear steam supply system meets the requirement of the initial operation condition of the unit can be judged.
In some embodiments, prior to step S10, the following steps are included:
step S09: and receiving an intervention action signal containing the requirements of the operation regulations of the fault working conditions or the disaster accidents.
The method can be understood that when the nuclear power plant has a fault condition or a disaster accident, the operator confirms that the fault condition or the disaster accident really occurs, and executes the intervention action required by the operation regulation of the fire accident, and then the unit withdrawing state guidance system of the invention intervenes to judge whether the withdrawing requirement is generated.
In some embodiments, referring to fig. 2, step S20 may include the following steps:
step S21: taking the pullback state of the highest level as the current pullback state;
step S22: determining a withdrawing function corresponding to the current withdrawing state, judging whether the withdrawing function is available according to the current operation condition information of the unit, and if not, executing the step S27; if yes, go to step S23;
step S23: determining a risk item corresponding to the current withdrawing state, judging whether the risk item exists according to the current operation condition information of the unit, and if so, executing a step S27; if not, executing the step S24;
step S24: judging whether the current withdrawing state is the lowest withdrawing state, if so, executing a step S25; if not, executing step S26;
step S25: obtaining a diagnosis result which takes the current withdrawal state as the final withdrawal state;
step S26: taking the next withdrawing state of the current withdrawing state as the current withdrawing state, and executing the step S22;
step S27: judging whether the current withdrawing state is the highest withdrawing state, if so, executing the step S28; if not, executing step S29;
step S28: obtaining the diagnosis result that the highest-level withdrawal state is unavailable;
step S29: and obtaining a last pullback state of the current pullback state as a final diagnosis result of the pullback state.
It is understood that, in step S21, when the logical judgment is performed, it is judged step by step whether the unit can be backed until the final backed state is reached. In this embodiment, the unit starts to retreat from the highest retreat state from the current operation state. That is, the state is backed from the current operation state to the highest-level back-up state, and the state can be backed from the highest-level back-up state to the next back-up state adjacent to the highest-level back-up state, and so on until the state is backed to the lowest-level back-up state.
The withdrawing function means: when the control unit is withdrawn from the current operation state to the highest withdrawal state, or is withdrawn from one withdrawal state to the next withdrawal state adjacent to the one withdrawal state, the control unit needs to be supported by the functions of a specific unit or units, but the units may stop working temporarily due to fault conditions, so that the control unit cannot enter the corresponding withdrawal state. Therefore, it is necessary to diagnose whether or not the fallback function corresponding to the fallback state is available.
For example, the nuclear power plant is withdrawn from a first withdrawal state (power operation condition) to a second withdrawal state (thermal shutdown condition), wherein the boron concentration of the primary coolant is changed from the critical boron concentration to the boron concentration of the thermal shutdown, so that the withdrawal from the first withdrawal state (power operation condition) to the second withdrawal state (thermal shutdown condition) requires the first withdrawal function (boronizing function of the primary coolant) to be used; wherein the primary coolant boration function may include both maximum flow and emergency boration of the nuclear steam supply system functions. Thus, when one of the two functions is available for maximum flow boronization and emergency boronization, the first pullback function is available from the first pullback state to the second pullback state, otherwise the first pullback function is not available. When all the pullback functions required for the state condition change from the pullback state one to the pullback state two are available, the state can be pulled back from the pullback state one to the pullback state two.
In step S22, determining the fallback function corresponding to the current fallback state includes: and determining a preset withdrawing function corresponding to the current withdrawing state according to the current withdrawing state.
The invention can obtain the corresponding pullback function by presetting the pullback function corresponding to each pullback state in the diagnostic process that the unit prepares to be pulled back from the current operation state to the most advanced pullback state or in the diagnostic process that the unit is pulled back from a pullback state to the next pullback state adjacent to the pullback state. One or more fallback functions may be provided for each fallback state.
In some embodiments, referring to fig. 3, the step of acquiring the fallback function includes:
step S221: determining the current state of the unit and the withdrawing state of the unit to be withdrawn;
step S222: acquiring the current state condition of the unit according to the current state;
step S223: acquiring a first state condition of the unit according to a withdrawing state to be withdrawn;
step S224: and comparing the corresponding relation between the first state condition and the current state condition to obtain the required withdrawing function for changing the current state condition to the first state condition.
It is understood that the current state of the unit may be the current operating state, or may be one of X pullback states. The unit is withdrawn from the current operation state to the highest withdrawal state, or is withdrawn from one withdrawal state to the next withdrawal state adjacent to the withdrawal state, and the unit operation condition information (the state conditions of reactor power, reactivity, loop average temperature, pressure and the like) is required to reach corresponding conditions; for this purpose, functional support of the units is required which enables these state conditions to be changed.
When judging whether the fallback function is available, in some embodiments, whether the equipment is failed is judged according to a fault condition report (a monitoring system of the nuclear power plant may list equipment affected by the fault condition as failed equipment and generate a fault condition report), and when the equipment is failed, the fallback function may be judged to be unavailable. In some embodiments, the device is provided with a status diagnostic means to feedback whether its own functionality is available.
In step S23, the risk item means: when the control unit is backed up from the current operation state to the highest-level back-up state or is backed up from one back-up state to the next back-up state adjacent to the one back-up state, unnecessary protection system actions are made or unexpected transient states are introduced due to the back-up. The risk item is generated when the machine set is withdrawn, and the safety of the machine set is endangered; which may include one or more.
For example, in case of a fire in a train of safety plants in a nuclear power plant, the electric isolation valve of the safety injection tank is inevitably lost due to the burning of the power supply or the intervention operation (power cut) of the fire, so that the operator cannot close the electric isolation valve of the safety injection tank. The upper part of the boric acid solution in the safety injection box is filled with nitrogen gas of about 4.7MPa.a, the safety injection box is connected with a reactor coolant system, a check valve is further arranged on a connecting pipeline, when the safety injection box is in normal operation, an electric isolation valve of the safety injection box is kept open, the pressure of the reactor coolant system is 15.5MPa, and the safety injection box cannot be injected into the reactor coolant system because the pressure of the reactor coolant system is higher than that of the safety injection box. If the pressure is reduced to be lower than the injection pressure of the safety injection tank in the withdrawing process, the safety injection tank can be injected, the pressure liquid level of a primary circuit is fluctuated, and the electric isolation valve of the safety injection tank can not be closed, even nitrogen in the safety injection tank can be injected into the primary circuit, so that the heat conduction capability between a primary circuit and a secondary circuit is deteriorated, and the safety of a unit is endangered.
In some embodiments, referring to fig. 4, step S23 includes the following steps:
step S231: according to the current withdrawing state, combining a preset second mapping table to obtain a corresponding risk item; the second mapping table comprises a mapping relation between the withdrawing state and the risk items;
step S232: determining an isolation function for eliminating the risk items according to the obtained risk items;
step S233: judging whether the isolation function is available according to the current state information of the nuclear steam supply system; if yes, determining that no risk item exists, and executing a step S24; if not, it is determined that a risk item exists and step S27 is performed.
It can be understood that a second mapping table may be formulated in advance according to the operation history data of the nuclear power plant and/or the design of the unit, and the correspondence between each fallback state and the risk item is included to meet the fallback requirement condition. Each fallback state may correspondingly have one or more risk items. In order to solve the risk items generated by withdrawing to the withdrawing state, an isolation device for eliminating the corresponding risk items is required to provide functional support. The above-mentioned method for determining the fallback function can be referred to for determining whether the isolation function is available, which is not described herein again.
Therefore, it is necessary to determine that all necessary fallback functions are available and that all risk items are not present, whether the unit is to be backed from the current operating state to the highest level of the fallback state or to be backed from one fallback state to the next fallback state adjacent to the one fallback state.
Steps S24 to S29 are determination steps set for finding the most suitable pull-back state, and the unit is controlled to approach or enter the pull-back state of the lowest level as much as possible to ensure that the damage to the unit safety is minimized on the premise that the pull-back function is available and no risk item exists.
For example, in a nuclear power plant, when a train of safe plants is in fire under the initial power operation condition of a unit, on-site operators cut off all power supplies in the train of safe plants, a coolant pump of the train is caused to be unavailable, normal spraying is performed, and a plurality of nuclear steam supply system functions such as an upper charging function, a high-pressure discharging function and a low-pressure discharging function of a chemical and volume control system are caused to be unavailable, wherein the unavailable low-pressure function causes a depressurization function which is withdrawn to the normal cold shutdown condition to be unavailable, so that the nuclear steam supply system can be withdrawn to the last state of the normal cold shutdown condition only, namely, the shutdown condition in the middle of cooling of a waste heat discharge system. Although the back-off function which is back-off to the waste heat discharge system for cooling the middle shutdown condition can be used, the risk item that the safety injection box cannot be isolated exists, so that the back-off function can only be back-off to the last state of the waste heat discharge system for cooling the middle shutdown condition, namely the middle shutdown condition of steam generator cooling (the primary circuit pressure is more than 6.9 MPa.g).
In some embodiments, in step S30, outputting the state guidance information includes: and outputting the guide information which requires the unit to retreat to the final retreat state, or outputting the guide information which requires the unit to keep the current state.
It should be understood that after determining the final pull-back state in step S20, if the diagnostic unit cannot enter at least the highest pull-back state, it represents that the diagnostic unit cannot be pulled back to any one of the pull-back states, and at this time, the operator can only be guided to remain in the original state.
In some embodiments, in addition to outputting the guidance information, the step S30 may also output information such as a unit state, a unit operation condition, a judgment result of whether the fallback function is available, and a judgment result of whether the risk item exists.
The invention also constructs a unit withdrawal state guide system which can output the guide information of the withdrawal state which is to ensure the unit safety when the fault working condition or disaster accident occurs.
The guidance system includes:
the acquisition and judgment module is used for acquiring the initial operation condition information of the unit and the current state information of the nuclear steam supply system and judging whether the requirement for withdrawing is met or not according to the initial operation condition information of the unit and the current state information of the nuclear steam supply system;
the acquisition and diagnosis module is used for acquiring the current operation condition information of the unit when the requirement condition for withdrawing is met; performing logic diagnosis by combining the current state information of the nuclear steam supply system to obtain a diagnosis result;
and the display module is used for outputting the state guide information according to the diagnosis result.
In some embodiments, the acquisition diagnostic module comprises:
the first judgment unit is used for receiving a judgment result of whether the requirement condition of the withdrawing is met; and after receiving the judgment result meeting the requirement of the withdrawing, taking the withdrawing state of the highest level as the current withdrawing state, and determining the withdrawing function corresponding to the current withdrawing state.
The first judging unit is further used for receiving the current operation condition information of the unit, judging whether the back-up function is available according to the current operation condition information of the unit, sending a judging result that the back-up function is available to the second judging unit when the back-up function is available, and sending a judging result that the back-up function is unavailable to the third judging unit when the back-up function is unavailable.
The first determining unit is further configured to determine, according to the received signal that takes the next fallback state of the current fallback state as the current fallback state, and determine again whether the fallback function corresponding to the current fallback state is available.
And the second judging unit is used for receiving a judging result that the pull-back function is available and determining a risk item corresponding to the current pull-back state. The second judgment unit is also used for receiving the current operation condition information of the unit and judging whether a risk item exists according to the current operation condition information of the unit; and when the risk item exists, the judgment result of the risk item existence is sent to the third judgment unit, and when the risk item does not exist, the judgment result of the risk item nonexistence is sent to the fourth judgment unit.
A third judging unit, configured to receive the judgment result, and judge, according to the judgment result, whether the current pull-back state is the highest pull-back state; when the current withdrawing state is not the highest withdrawing state, the determining information which determines the last withdrawing state of the current withdrawing state as the final withdrawing state is sent to the display module.
A fourth judging unit, configured to receive the judgment result, and judge, according to the judgment result, whether the current pull-back state is the lowest-level pull-back state; when the current withdrawing state is the lowest withdrawing state, sending determination information containing the current withdrawing state determined as the final withdrawing state to a display module; and when the current pull-back state is not the pull-back state of the lowest level, sending a signal which takes the next pull-back state of the current pull-back state as the current pull-back state to the first judging unit.
In some embodiments, the first judging unit includes:
the first acquisition part is used for acquiring a first state condition of the unit in the current withdrawing state according to the current withdrawing state; and acquiring the current state condition of the current operation of the unit according to the acquired information of the current operation condition of the unit.
And the first comparison part is used for comparing the first state condition with the current state condition and determining the corresponding relation between the first state condition and the current state condition to obtain the pull-back function corresponding to the current pull-back state.
The first judgment part is used for judging whether the back-up function is available or not according to the collected current operation condition information of the unit; when the pull-back function is unavailable, a judgment result containing the unavailability of the pull-back function is sent to a third judgment unit; and when the pull-back function is available, sending a judgment result containing the availability of the pull-back function to the second judgment unit.
In some embodiments, the second determination unit includes:
and the second acquisition part is used for combining a preset second mapping table to obtain a corresponding risk item according to the current withdrawing state.
And a first determination unit for determining an isolation function for eliminating the risk item based on the obtained risk item.
A second judgment part for judging whether the isolation function is available according to the current state information of the nuclear steam supply system; when the isolation function is available, sending a judgment result containing the risk-free item to a fourth judgment unit; and when the isolation function is unavailable, sending a judgment result containing the risk item to a third judgment unit.
In some embodiments, the acquisition determination module comprises:
the acquisition unit is used for acquiring the initial operation condition information of the unit; and according to the collected initial operation condition information, combining with a preset first mapping table, obtaining the system state requirement of the nuclear steam supply system.
The acquisition and judgment unit is used for acquiring the current state information of the nuclear steam supply system and judging whether the current state information of the nuclear steam supply system meets the system state requirement; and sending the judgment result of whether the requirement condition of the withdrawing is met to the acquisition diagnosis module.
In some embodiments, the crew fallback state directing system further comprises a receiving module. The receiving module is used for receiving an intervention action signal containing a fault working condition or disaster accident operation regulation requirement and sending the intervention action signal to the acquisition and judgment module. The intervention action signal can be used as a starting command to instruct the acquisition and judgment module to execute work.
In some embodiments, the guidance screen includes guidance information that requires the crew to back to a final back state or requires the crew to remain in a current state. In some embodiments, the guidance screen further includes information on a determination result of whether the fallback function is available and/or a determination result of whether the risk item exists.
The invention also constructs a machine set withdrawing state guiding method, which comprises a processor and a memory stored with a computer program, wherein the processor realizes the steps of the machine set withdrawing state guiding method when executing the computer program.
The present invention also provides a computer-readable storage medium, in which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the train fallback state directing method described above.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (12)
1. A unit withdrawal state guide method is characterized by comprising the following steps:
step S10: acquiring initial operation condition information of a unit and current state information of a nuclear steam supply system, and judging whether a withdrawing requirement condition is met or not according to the initial operation condition information of the unit and the current state information of the nuclear steam supply system;
step S20: when the requirement condition of withdrawing is met, collecting the current operation condition information of the unit, and carrying out logic diagnosis by combining the current state information of the nuclear steam supply system to obtain a diagnosis result;
step S30: and outputting state guide information according to the diagnosis result.
2. The crew fallback state directing method according to claim 1, wherein the step S20 comprises:
step S21: taking the pullback state of the highest level as the current pullback state;
step S22: determining a withdrawing function corresponding to the current withdrawing state, judging whether the withdrawing function is available according to the current operation condition information of the unit, and if not, executing the step S27; if yes, go to step S23;
step S23: determining a risk item corresponding to the current withdrawing state, judging whether the risk item exists according to the current operation condition information of the unit, and if so, executing a step S27; if not, executing the step S24;
step S24: judging whether the current withdrawing state is the lowest withdrawing state, if so, executing a step S25; if not, executing step S26;
step S25: obtaining a diagnosis result which takes the current withdrawing state as a final withdrawing state;
step S26: taking the next withdrawing state of the current withdrawing state as the current withdrawing state, and executing the step S22;
step S27: judging whether the current withdrawing state is the highest withdrawing state, if so, executing a step S28; if not, executing step S29;
step S28: obtaining a diagnosis result that the highest-level withdrawal state is unavailable;
step S29: and obtaining a last pullback state of the current pullback state as a final diagnosis result of the pullback state.
3. The method for guiding the set back state according to claim 2, wherein in the step S30, outputting the state guiding information comprises:
and outputting the guide information which requires the unit to retreat to the final retreat state, or outputting the guide information which requires the unit to keep the current state.
4. The method for guiding a set back state according to claim 2 or 3, wherein the step S30 further comprises:
and outputting a judgment result of whether the fallback function is available and a judgment result of whether the risk item exists.
5. The unit pullback state guidance method according to claim 2, wherein in step S22, determining the pullback function corresponding to the current pullback state includes:
and determining a preset withdrawing function corresponding to the current withdrawing state according to the current withdrawing state.
6. The unit pullback state guidance method according to claim 5, wherein the step of acquiring the pullback function comprises:
step S221: determining the current state of the unit and the withdrawing state of the unit to be withdrawn;
step S222: acquiring the current state condition of the unit according to the current state;
step S223: acquiring a first state condition of the unit according to the withdrawing state to be withdrawn;
step S224: and comparing the corresponding relation between the first state condition and the current state condition to obtain the required withdrawing function for changing the current state condition to the first state condition.
7. The crew fallback state directing method according to claim 2, wherein the step S23 comprises:
step S231: according to the current withdrawing state, combining a preset second mapping table to obtain the corresponding risk item; the second mapping table comprises a mapping relation between the withdrawing state and the risk item;
step S232: determining an isolation function for eliminating the risk items according to the obtained risk items;
step S233: judging whether the isolation function is available according to the current state information of the nuclear steam supply system; if yes, determining that the risk item does not exist, and executing the step S24; if not, determining that the risk item exists, and executing the step S27.
8. The unit pullback state guidance method according to claim 1, wherein the step S10 includes:
step S11: collecting the initial operation condition information of the unit;
step S12: according to the collected initial operation condition information, combining with a preset first mapping table, obtaining the state requirement of the nuclear steam supply system; the first mapping table comprises a mapping relation between the initial operation condition information and the state requirement of the nuclear steam supply system;
step S13: collecting the current state information of the nuclear steam supply system, and judging whether the current state information of the nuclear steam supply system meets the state requirement;
if not, determining that the requirement condition of withdrawing is met;
if yes, determining that the pull-back requirement condition is not met.
9. The unit pullback state guidance method according to claim 1, further comprising, before step S10:
step S09: and receiving an intervention action signal containing the requirement of the operation regulation of the fault working condition or the disaster accident, and executing the step S10.
10. A unit pull back state guidance system, comprising:
the acquisition and judgment module is used for acquiring the initial operation condition information of the unit and the current state information of the nuclear steam supply system and judging whether the requirement for withdrawing is met or not according to the initial operation condition information of the unit and the current state information of the nuclear steam supply system;
the acquisition and diagnosis module is used for acquiring the current operation condition information of the unit when the requirement condition for withdrawing is met; performing logic diagnosis by combining the current state information of the nuclear steam supply system to obtain a diagnosis result;
and the display module is used for outputting state guide information according to the diagnosis result.
11. A unit pull-back state directing apparatus comprising a processor and a memory storing a computer program, wherein the processor implements the steps of the unit pull-back state directing method according to any one of claims 1 to 9 when executing the computer program.
12. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, which when executed by a processor implements the steps of the set fallback state directing method according to any one of the preceding claims 1-9.
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| CN202210878186.5A CN115310786A (en) | 2022-07-25 | 2022-07-25 | Unit back-up state guiding method, system, device and computer readable storage medium |
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| CN202210878186.5A CN115310786A (en) | 2022-07-25 | 2022-07-25 | Unit back-up state guiding method, system, device and computer readable storage medium |
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