CN112366012A - Water level early warning method and device for steam generator, terminal equipment and storage medium - Google Patents
Water level early warning method and device for steam generator, terminal equipment and storage medium Download PDFInfo
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- CN112366012A CN112366012A CN202011146258.4A CN202011146258A CN112366012A CN 112366012 A CN112366012 A CN 112366012A CN 202011146258 A CN202011146258 A CN 202011146258A CN 112366012 A CN112366012 A CN 112366012A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/38—Determining or indicating operating conditions in steam boilers, e.g. monitoring direction or rate of water flow through water tubes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The application is suitable for the technical field of nuclear power plant control, and particularly relates to a water level early warning method and device for a steam generator, terminal equipment and a storage medium. The method comprises the steps of judging the change condition of the water level in the steam generator through the indicated value and the change rate of a water level measurement control signal of the steam generator, determining the time when the water level reaches a high water level fixed value when the water level rises, determining the time when the water level reaches a low water level fixed value when the water level falls, and displaying the time when the time is used, so that an operator can visually observe the time when the water level reaches the high water level fixed value or the low water level fixed value.
Description
Technical Field
The application belongs to the technical field of nuclear power plant control, and particularly relates to a water level early warning method and device for a steam generator, terminal equipment and a storage medium.
Background
Steam generator water level governing system is used for adjusting steam generator's water level in the nuclear power plant master-control room, avoids the reactor shutdown that water level transfinites among the steam generator and leads to, but current steam generator's detection only can embody the change condition of water level and water level, can't be directly perceivedly with water level change among the steam generator and reactor shutdown be correlated with, make the operator can not discover steam generator's anomaly in effectual time, delay the opportunity of interveneeing owner's water supply system, be difficult to intervene the reactor shutdown that water level control system trouble arouses successfully.
Disclosure of Invention
The application provides a water level early warning method and device of a steam generator, terminal equipment and a storage medium, and can solve the problem that in the prior art, the water level change in the steam generator cannot be intuitively associated with reactor shutdown, so that the reactor shutdown caused by the failure of a water level control system cannot be successfully interfered.
In a first aspect, the present application provides a water level early warning method of a steam generator, the water level early warning method including:
acquiring an indicated value and an indicated value change rate of a water level measurement control signal of the steam generator;
detecting a change direction of the change rate of the indicated value, wherein the change direction comprises positive and negative, the positive change direction indicates that the water level of the steam generator rises, and the negative change direction indicates that the water level of the steam generator falls;
detecting whether the reactor power is greater than a power threshold;
if the change direction of the indicated value change rate is positive and the reactor power is greater than a power threshold value, acquiring a water level high fixed value, wherein the water level high fixed value is used for indicating that a steam generator is about to be filled, and determining and displaying a first reactor shutdown countdown time according to the water level high fixed value, the indicated value and the indicated value change rate, wherein the first reactor shutdown countdown time is the time for the water level in the steam generator to reach the water level high fixed value;
if the change direction of the indicated value change rate is negative, a first water level low fixed value is obtained and used for indicating that the steam generator is about to be emptied, second reactor shutdown countdown time is determined and displayed according to the first water level low fixed value, the indicated value and the indicated value change rate, and the first water level low fixed value is smaller than the water level high fixed value when the water level in the steam generator reaches the first water level low fixed value.
In a second aspect, the present application provides a water level early warning apparatus of a steam generator, the water level early warning apparatus including:
the indicated value acquisition module is used for acquiring an indicated value and an indicated value change rate of a water level measurement control signal of the steam generator;
the indicated value detection module is used for detecting the change direction of the change rate of the indicated value, wherein the change direction comprises positive and negative, the positive change direction indicates that the water level of the steam generator rises, and the negative change direction indicates that the water level of the steam generator falls;
the power detection module is used for detecting whether the reactor power is larger than a power threshold value;
a first time determination module, configured to, if a change direction of the indicated value change rate is positive and the reactor power is greater than a power threshold, obtain a water level high fixed value, where the water level high fixed value is used to indicate that a steam generator is about to be filled, determine and display a first reactor shutdown countdown time according to the water level high fixed value, the indicated value, and the indicated value change rate, where the first reactor shutdown countdown time is a time taken for a water level in the steam generator to reach the water level high fixed value;
and the second time determination module is used for acquiring a first water level low fixed value if the change direction of the indicated value change rate is negative, wherein the first water level low fixed value is used for indicating that the steam generator is about to be emptied, and determining and displaying a second reactor shutdown countdown time according to the first water level low fixed value, the indicated value and the indicated value change rate, wherein the second reactor shutdown countdown time is when the water level in the steam generator reaches the first water level low fixed value, and the first water level low fixed value is smaller than the water level high fixed value.
In a third aspect, an embodiment of the present application provides a terminal device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor, when executing the computer program, implements the water level early warning method according to the first aspect.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where a computer program is stored, and when executed by a processor, the computer program implements the water level warning method according to the first aspect.
In a fifth aspect, the present application provides a computer program product, which when running on a terminal device, causes the terminal device to execute the water level early warning method according to the first aspect.
Compared with the prior art, the embodiment of the application has the advantages that: the utility model provides an instructed value and the rate of change of water level measurement control signal through steam generator, judge the change condition of water level in the steam generator, when the water level rises according to the high definite value of water level, when the rate of change of instructed value and instructed value confirms the use that the water level reaches the high definite value of water level, when the water level descends according to the low definite value of water level, when the rate of change of instructed value and instructed value confirms the time that the water level reaches the low definite value of water level, and will show with the time spent, make the operator can observe the time that the water level reaches the high definite value of water level or the low definite value of water level directly perceivedly, because the low definite value of water level and the high definite value of water level are the limit value that the reactor stopped, consequently, the operator of being convenient for when showing judges whether to start the intervention, thereby in time intervene the.
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In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flowchart of a water level warning method of a steam generator according to an embodiment of the present disclosure;
fig. 2 is a schematic flowchart of a water level warning method of a steam generator according to a second embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a water level warning device of a steam generator according to a third embodiment of the present application;
fig. 4 is a schematic structural diagram of a terminal device according to a fourth embodiment of the present application.
Detailed Description
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 present application. It will be apparent, however, to one skilled in the art that the present application 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 application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to" determining "or" in response to detecting ". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between descriptions and not necessarily for describing or implying relative importance.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
The water level early warning method of the steam generator provided by the embodiment of the application can be applied to terminal equipment such as a desktop computer, a notebook computer, an ultra-mobile personal computer (UMPC) and the like, and the embodiment of the application does not limit the specific type of the terminal equipment at all.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
In order to explain the technical means of the present application, the following description will be given by way of specific examples.
Referring to fig. 1, a schematic flowchart of a water level early warning method for a steam generator provided in an embodiment of the present application, the water level early warning method for a steam generator is applied to a terminal device, for example, the terminal device may be a device that operates a water level adjustment system of a steam generator in a main control room of a nuclear power plant, and as shown in fig. 1, the water level early warning method includes:
step S101, obtaining an indication value and an indication value change rate of a water level measurement control signal of the steam generator.
The indicated value of the water level measurement control signal of the steam generator can be used for indicating the water level in the steam generator, the change rate of the indicated value can represent the change condition of the indicated value, for example, the indicated value is increased or decreased, and the change rate of the indicated value can be obtained according to the change magnitude of the indicated value in a preset time period; the water level measurement control signal is a signal obtained by measuring the water level of the steam generator, the signal is output to a steam generator water level adjusting system of a nuclear power plant main control room and displayed in a corresponding module, and the value displayed in the module is an indicated value. The indicator may be a steam generator water level signal selected for reactor trip protection.
Step S102, detecting the change direction of the change rate of the indication value.
Wherein, the change direction of the change rate of the indication value comprises positive and negative, the positive change direction indicates the water level of the steam generator is increased, and the negative change direction indicates the water level of the steam generator is decreased.
Optionally, the detecting the change direction of the indicator value change rate includes:
carrying out differentiation processing on the change rate of the indication value to obtain a differentiation result;
if the differential result is a positive value, determining that the change direction of the change rate of the indication value is positive; if the differentiation result is negative, the direction of change of the rate of change of the indication value is determined to be negative.
The differential of the change rate of the indication value can indicate the change direction of the change rate of the indication value, namely, if the differential result of the change rate of the indication value is positive, the indication value is increased, and if the differential result of the change rate of the indication value is negative, the indication value is decreased.
Step S103, detecting whether the reactor power is larger than a power threshold value.
When the reactor power is larger than the power threshold, the condition of positive steam-water mismatch needs to be monitored, and the reactor shutdown caused by high water level of a steam generator is avoided.
And step S104, if the change direction of the change rate of the indication value is positive and the reactor power is greater than the power threshold, acquiring a water level high fixed value.
Wherein, the high definite value of water level is used for instructing steam generator and is about to fill, and the high definite value of water level is a high limit value of water level, promptly, according to the mechanism of nuclear power plant reactor protection, when power shutdown allowability signal exists, when the water level is higher than the high definite value of water level in the steam generator, will trigger the reactor shutdown. The direction of change of the rate of change of the indicator value is such that an increase in the indicator value is indicated, and an upper limit value of the water level (i.e. a constant upper water level) is required to avoid a reactor shutdown caused by the water level increasing beyond the upper limit value.
And step S105, determining and displaying the first reactor shutdown countdown time according to the water level height fixed value, the indicating value and the indicating value change rate.
When the water level in the steam generator reaches the water level high fixed value, the indicated value is smaller than the water level high fixed value when the reactor normally operates, a water level difference value can be obtained according to the water level high fixed value and the indicated value, namely the difference value between the water level high fixed value and the indicated value, the difference value between the water level high fixed value and the indicated value is divided by the change rate of the indicated value to obtain a first quotient, and the first quotient is determined to be first shutdown countdown time, for example, the change rate of the indicated value is 0.01m/s, the difference value is 1m, the first shutdown countdown time is a quotient of 1m divided by 0.01m/s, namely the first shutdown countdown time is 100 s; displaying the first trip countdown time is to display a numerical value corresponding to the first trip countdown time through a corresponding display module, for example, a corresponding display module is additionally arranged in a visual interface of a steam generator water level adjustment system of a main control room of the nuclear power plant, and the first trip countdown time is displayed in the display module of the visual interface.
And step S106, if the change direction of the change rate of the indication value is negative, acquiring a first water level low fixed value.
Wherein, the low definite value of first water level is used for instructing steam generator and is about to the evacuation, and the low definite value of first water level is a low limit value of water level, promptly, according to the mechanism of nuclear power plant's reactor, when the water level is less than the low definite value of first water level in steam generator, will trigger the reactor shut down in order to avoid the reactor heat can't in time derive. If the direction of change of the indicated value change rate is negative, the indicated value is decreased, and the lower limit value of the water level (i.e. the first water level lower value) needs to be acquired to avoid the reactor shutdown caused by the water level falling below the lower limit value.
And step S107, determining and displaying the second reactor shutdown countdown time according to the first water level low fixed value, the indicating value and the change rate of the indicating value.
When the water level in the steam generator reaches the first water level low fixed value, the first water level low fixed value is smaller than the water level high fixed value, when the reactor normally operates, the indicated value is larger than the first water level low fixed value and is smaller than or equal to the water level high fixed value, a water level difference value can be obtained according to the first water level low fixed value and the indicated value, namely the difference value between the first water level low fixed value and the indicated value, the difference value between the first water level low fixed value and the indicated value is divided by the change rate of the indicated value to obtain a second quotient, and the second quotient is determined to be a second shutdown countdown time, for example, the change rate of the indicated value is 0.01m/s, the difference value is 1m, and the second shutdown countdown time is the quotient of dividing 1m by 0.01m/s, namely the second shutdown countdown time is 100 s; because first time of putting down a heap countdown time and second time of putting down a heap countdown time for the time that different moments exist, consequently, first time of putting down a heap countdown time and second time of putting down a heap countdown time can show in same display module, of course, first time of putting down a heap countdown time and second time of putting down a heap countdown time also can show in different display modules, and this application does not restrict first time of putting down a heap countdown time and second time of putting down a heap countdown time and showing in same display module.
Optionally, the water level early warning method further includes:
judging whether the first shutdown countdown time or the second shutdown countdown time is greater than the target time or not;
and if the first shutdown countdown time is less than or equal to the target time, or the second shutdown countdown time is less than or equal to the target time, outputting alarm information.
When the first reactor shutdown countdown time is less than or equal to the target time or the second reactor shutdown countdown time is less than or equal to the target time, it indicates that the reactor is about to be shut down due to the water level of the steam generator, and an operator needs to perform corresponding measures as soon as possible, for example, the countdown time is 100s, the target time is 600s, and at this time, an alarm message is output; the alarm information may be an audio alarm or a light alarm, or may be a color change of a display module that displays the countdown time, for example, the display module is a box in a visual interface, wherein the display module displays the countdown time, and the alarm information may be a control signal that controls a boundary of the box to turn red and increases the brightness of the display module.
Optionally, the water level early warning method further includes:
judging whether a power shutdown allowing signal exists or not;
if the power shutdown permission signal does not exist, the step of obtaining an indicator value and a rate of change of the indicator value of the water level measurement control signal of the steam generator is performed.
Wherein, the power shutdown allowing signal is a signal given after the shutdown switch is turned off, the occurrence of the signal indicates that the reactor is in a shutdown state, and a water level early warning is performed when the reactor is not shutdown, so that if the power shutdown allowing signal does not exist, the steps S101 to S107 are performed.
The embodiment of the application judges the change condition of the water level in the steam generator through the indicated value and the change rate of the water level measurement control signal of the steam generator, determines the use of the water level reaching the high water level fixed value according to the high water level fixed value, the indicated value and the change rate of the indicated value when the water level rises, determines the use of the water level reaching the low water level fixed value according to the low water level fixed value, the indicated value and the change rate of the indicated value when the water level falls, and displays the use time, so that an operator can visually observe the time of the water level reaching the high water level fixed value or the low water level fixed value, and the water level change of the evaporator to the reactor shutdown limit value caused by the steam-water mismatch of the low water level fixed value and the high water level fixed value, therefore, the operator can conveniently judge whether to start intervention is carried out during the displayed use, thereby timely, the safe and stable operation level of the nuclear power unit is improved.
Referring to fig. 2, which is a schematic flow chart of a water level early warning method of a steam generator according to a second embodiment of the present disclosure, as shown in fig. 2, the water level early warning method may include the following steps:
in step S201, an indication value and a change rate of the indication value of a water level measurement control signal of the steam generator are obtained.
In step S202, the direction of change of the rate of change of the indication value is detected.
Step S203, detecting whether the reactor power is larger than a power threshold value.
In step S204, if the change direction of the change rate of the indication value is positive and the reactor power is greater than the power threshold, a water level high fixed value is obtained.
And step S205, determining and displaying the first reactor shutdown countdown time according to the water level high fixed value, the indicating value and the indicating value change rate.
The contents of steps S201 to S205 are the same as the contents of steps S101 to S105, and reference may be made to the description of steps S101 to S105, which is not repeated herein.
In step S206, if the change direction of the change rate of the indication value is negative, the feedwater flow and the steam flow of the steam generator are acquired.
The water supply flow and the steam flow of the steam generator are monitored by other corresponding detection equipment and are provided for the terminal equipment, the water supply flow and the steam flow are parameters for measuring the steam-water balance in the steam generator, the water level is or is about to rise when the water supply flow is larger than the steam flow, and the water level is or is about to fall when the water supply flow is smaller than the steam flow.
Step S207, judging whether the difference value between the steam flow and the feedwater flow is smaller than a difference threshold value.
Wherein, the difference threshold value is set according to actual requirements to prevent the water level of the steam generator from being quickly emptied. The difference threshold may be 40% of the feed water flow at full power, for example, the full power of a single steam generator is 1937t/h, 40% corresponds to 775 tons per hour, when the difference between the steam flow and the feed water flow is greater than or equal to 775t/h, it means that the steam generator water level will drop very fast, and therefore, a steam-water flow mismatch signal is sent out, when the steam generator water level drops to-0.9 m (the second water level is low, the constant value) the reactor shutdown is triggered, when the difference between the steam flow and the feed water flow is less than 775t/h, it indicates that the steam-water mismatch signal does not exist, and the reactor shutdown signal is sent out at-1.26 m (the first water level is low, the constant value).
In step S208, if the difference value between the steam flow and the feedwater flow is smaller than the difference threshold, a first water level low fixed value is obtained.
And step S209, determining and displaying a second reactor shutdown countdown time according to the first water level low fixed value, the indicating value and the indicating value change rate.
Step S208 and step S209 are the same as step S106 and step S107, and the description of step S106 and step S107 can be referred to, and are not repeated here.
And step S210, if the difference value between the steam flow and the feedwater flow is larger than or equal to the difference threshold, acquiring a second water level low fixed value.
Wherein, the low definite value of second water level is greater than the low definite value of first water level and is less than the high definite value of water level, and the low definite value of second water level is the low limit value of steam generator's water level when feedwater flow is less than steam flow, promptly, according to the mechanism of nuclear power plant's reactor, and the feedwater flow when steam generator is far less than steam flow, in order to prevent that steam generator from empting fast, when the water level is less than the low definite value of second water level in steam generator, protect in advance, trigger the reactor shut down. When the change direction of the change rate of the indicated value is negative, the indicated value is reduced, and at the moment, a low limit value of the water level (namely a second water level low fixed value) needs to be obtained so as to early warn that the reactor is shut down when the water level is reduced to be lower than the low limit value when the feedwater flow is far smaller than the steam flow.
And step S211, determining and displaying a third reactor shutdown countdown time according to the second water level low fixed value, the indicating value and the change rate of the indicating value.
When the water level in the steam generator reaches the second water level low fixed value, the reactor still normally operates when the feedwater flow is smaller than the steam flow, the indicated value is larger than the second water level low fixed value, a water level difference value can be obtained according to the second water level low fixed value and the indicated value, namely the difference value between the second water level low fixed value and the indicated value, the difference value between the second water level low fixed value and the indicated value is divided by the change rate of the indicated value to obtain a third quotient, and the third quotient is determined to be third shutdown countdown time, for example, the change rate of the indicated value is 0.01m/s, the difference value is 1m, the third shutdown countdown time is the quotient of 1m divided by 0.01m/s, namely the third shutdown countdown time is 100 s; because the first trip countdown time, the second trip countdown time and the third trip countdown time are the times existing at different moments, the first trip countdown time, the second trip countdown time and the third trip countdown time can be displayed in the same display module, and of course, the first trip countdown time, the second trip countdown time and the third trip countdown time can also be displayed in different display modules.
Optionally, the water level early warning method further includes:
judging whether the third pile-stopping countdown time is greater than the target time or not;
and if the third shutdown countdown time is less than or equal to the target time, outputting alarm information.
When the third reactor shutdown countdown time is less than or equal to the target time, which indicates that the reactor is about to be shut down due to the water level of the steam generator, an operator needs to perform corresponding measures as soon as possible, for example, the countdown time is 100s, the target time is 600s, and at this time, an alarm message is output; the alarm information may be an audio alarm or a light alarm, or may be a color change of a display module that displays the countdown time, for example, the display module is a box in a visual interface, wherein the display module displays the countdown time, and the alarm information may be a control signal that controls a boundary of the box to turn red and increases the brightness of the display module.
In the embodiment of the application, because the steam flow is greater than the water supply flow, the water level in the steam generator drops faster, the countdown time obtained by comparing the water level in the steam generator with the second water level low fixed value is shortened compared with the countdown time obtained by comparing the first water level low fixed value, and then based on the countdown time obtained by comparing the water level in the steam generator with the second water level low fixed value, the opportunity for judging whether to start intervention by an operator is advanced, so that a main water supply system is intervened in time, and the probability of reactor shutdown is reduced.
Corresponding to the water level early warning method of the steam generator in the above embodiment, fig. 3 illustrates a schematic structural diagram of a water level early warning apparatus of a steam generator provided in a third embodiment of the present application, which is applied to a terminal device, and for convenience of description, only the parts related to the embodiment of the present application are illustrated.
Referring to fig. 3, the water level early warning apparatus of the steam generator includes:
an indicated value obtaining module 31 for obtaining an indicated value and an indicated value change rate of a water level measurement control signal of the steam generator;
an indication value detection module 32, configured to detect a change direction of a change rate of an indication value, where the change direction includes positive and negative, and a positive change direction indicates a water level increase of the steam generator and a negative change direction indicates a water level decrease of the steam generator;
a power detection module 33 for detecting whether the reactor power is greater than a power threshold;
a first time determination module 34, configured to obtain a water level high fixed value if the change direction of the indication value change rate is positive and the reactor power is greater than the power threshold, where the water level high fixed value is used to indicate steam-water mismatch, and determine and display a first reactor shutdown countdown time according to the water level high fixed value, the indication value, and the indication value change rate, where the first reactor shutdown countdown time is a time when the water level in the steam generator reaches the water level high fixed value;
and a second time determination module 35, configured to obtain a first low water level fixed value if the change direction of the change rate of the indication value is negative, where the first low water level fixed value is used to indicate that the steam generator is about to be drained, and determine and display a second trip countdown time according to the first low water level fixed value, the indication value, and the change rate of the indication value, where the second trip countdown time is used when the water level in the steam generator reaches the first low water level fixed value, and the first low water level fixed value is smaller than the high water level fixed value.
Optionally, the second time determining module 35 includes:
the flow obtaining unit is used for obtaining the water supply flow and the steam flow of the steam generator if the change direction of the change rate of the indicating finger is negative;
the flow judging unit is used for judging whether the difference value between the steam flow and the water feeding flow is smaller than a difference value threshold value or not;
and the first fixed value acquisition unit is used for acquiring a first water level low fixed value if the difference value of the steam flow and the feedwater flow is smaller than a difference threshold value.
Optionally, the water level early warning apparatus further includes a third time determination module, where the third time determination module includes:
the second fixed value acquisition unit is used for acquiring a second water level low fixed value if the difference value between the steam flow and the steam flow feedwater flow is greater than or equal to the difference threshold value, wherein the second water level low fixed value is greater than the first water level low fixed value;
and the countdown time determining unit is used for determining and displaying a third reactor shutdown countdown time according to the second water level low fixed value, the indicated value and the change rate of the indicated value, wherein the third reactor shutdown countdown time is the time spent when the water level in the steam generator reaches the second water level low fixed value.
Optionally, the water level early warning apparatus further includes:
the first judgment module is used for judging whether the third pile-stopping countdown time is greater than the target time or not;
and the first alarm module is used for outputting alarm information if the third shutdown countdown time is less than or equal to the target time.
Optionally, the indication value detecting module 32 includes:
the differential processing unit is used for carrying out differential processing on the change rate of the indicating value to obtain a differential result;
a direction determining unit for determining a change direction of the indication value change rate as positive if the differentiation result is a positive value; if the differentiation result is negative, the direction of change of the rate of change of the indication value is determined to be negative.
Optionally, the water level early warning apparatus further includes:
the second judgment module is used for judging whether the first shutdown countdown time or the second shutdown countdown time is greater than the target time;
and the second alarm module is used for outputting alarm information if the first shutdown countdown time is less than or equal to the target time or the second shutdown countdown time is less than or equal to the target time.
Optionally, the water level early warning apparatus further includes:
the signal judgment module is used for judging whether the power shutdown allowance signal exists or not;
and the execution module is used for acquiring the indicator value and the change rate of the indicator value of the water level measurement control signal of the steam generator if the power shutdown allowing signal does not exist.
It should be noted that, because the above-mentioned information interaction between the modules, the execution process, and other contents are based on the same concept as the method embodiment of the present application, specific functions and technical effects thereof may be specifically referred to a part of the method embodiment, and details are not described herein again.
Fig. 4 is a schematic structural diagram of a terminal device according to a fourth embodiment of the present application. As shown in fig. 4, the terminal device 4 of this embodiment includes: at least one processor 40 (only one processor is shown in fig. 4), a memory 41, and a computer program 42 stored in the memory 41 and operable on the at least one processor 40, when the computer program 42 is executed by the processor 40, the steps of the water level early warning method of the steam generator of the above-described embodiment are implemented.
The terminal device may include, but is not limited to, a processor 40, a memory 41. Those skilled in the art will appreciate that fig. 4 is merely an example of the terminal device 4, and does not constitute a limitation of the terminal device 4, and may include more or less components than those shown, or combine some components, or different components, such as an input-output device, a network access device, and the like.
The Processor 40 may be a Central Processing Unit (CPU), and the Processor 40 may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 41 may in some embodiments be an internal storage unit of the terminal device 4, such as a hard disk or a memory of the terminal device 4. The memory 41 may be an external storage device of the terminal device 4 in other embodiments, such as a plug-in hard disk provided on the terminal device 4, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the memory 41 may also include both an internal storage unit of the terminal device 4 and an external storage device. The memory 41 is used for storing an operating system, an application program, a BootLoader (BootLoader), data, and other programs, such as program codes of a computer program. The memory 41 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules, so as to perform all or part of the functions described above. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the above-mentioned apparatus may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium and can implement the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include at least: any entity or device capable of carrying computer program code, recording medium, computer Memory, Read-Only Memory (ROM), Random-Access Memory (RAM), electrical carrier signals, telecommunications signals, and software distribution media. Such as a usb-disk, a removable hard disk, a magnetic or optical disk, etc. In certain jurisdictions, computer-readable media may not be an electrical carrier signal or a telecommunications signal in accordance with legislative and patent practice.
The present application may also implement all or part of the processes in the method according to the foregoing embodiments, and may also be implemented by a computer program product, when the computer program product runs on a terminal device, the steps in the first method embodiment may be implemented when the terminal device executes the computer program product, or when the computer program product runs on the terminal device, the steps in the second method embodiment may be implemented when the terminal device executes the computer program product.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, a module or a unit may be divided into only one logical function, and may be implemented in other ways, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the elements may be selected according to actual needs to achieve the objectives of the present embodiment.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A water level early warning method of a steam generator, the water level early warning method comprising:
acquiring an indicated value and an indicated value change rate of a water level measurement control signal of the steam generator;
detecting a change direction of the change rate of the indicated value, wherein the change direction comprises positive and negative, the positive change direction indicates that the water level of the steam generator rises, and the negative change direction indicates that the water level of the steam generator falls;
detecting whether the reactor power is greater than a power threshold;
if the change direction of the indicated value change rate is positive and the reactor power is greater than a power threshold value, acquiring a water level high fixed value, wherein the water level high fixed value is used for indicating that a steam generator is about to be filled, and determining and displaying a first reactor shutdown countdown time according to the water level high fixed value, the indicated value and the indicated value change rate, wherein the first reactor shutdown countdown time is the time for the water level in the steam generator to reach the water level high fixed value;
if the change direction of the indicated value change rate is negative, a first water level low fixed value is obtained and used for indicating that the steam generator is about to be emptied, second reactor shutdown countdown time is determined and displayed according to the first water level low fixed value, the indicated value and the indicated value change rate, and the first water level low fixed value is smaller than the water level high fixed value when the water level in the steam generator reaches the first water level low fixed value.
2. The water level early warning method according to claim 1, wherein if the direction of change of the indicator finger change rate is negative, the obtaining a first water level low value comprises:
if the change direction of the change rate of the indication finger is negative, acquiring the water supply flow and the steam flow of the steam generator;
judging whether the difference value of the steam flow and the feedwater flow is smaller than a difference threshold value;
and if the difference value between the steam flow and the feedwater flow is smaller than a difference threshold value, acquiring the first water level low fixed value.
3. The water level early warning method of claim 2, after determining whether the difference between the steam flow and the feedwater flow is less than a difference threshold, further comprising:
if the difference value between the steam flow and the feedwater flow is larger than or equal to the difference threshold value, acquiring a second water level low fixed value, wherein the second water level low fixed value is larger than the first water level low fixed value and smaller than the water level high fixed value;
and determining and displaying a third reactor shutdown countdown time according to the second water level low fixed value, the indicated value and the change rate of the indicated value, wherein the third reactor shutdown countdown time is the time for the water level in the steam generator to reach the second water level low fixed value.
4. The water level early warning method of claim 3, further comprising:
judging whether the third shutdown countdown time is greater than a target time or not;
and if the third shutdown countdown time is less than or equal to the target time, outputting alarm information.
5. The water level early warning method according to claim 1, wherein detecting the direction of change of the rate of change of the indication value comprises:
carrying out differentiation processing on the change rate of the indication value to obtain a differentiation result;
if the differential result is a positive value, determining that the change direction of the change rate of the indication value is positive; and if the differential result is a negative value, determining that the change direction of the change rate of the indication value is negative.
6. The water level early warning method of claim 1, further comprising:
judging whether the first shutdown countdown time or the second shutdown countdown time is greater than a target time;
and if the first shutdown countdown time is less than or equal to the target time, or the second shutdown countdown time is less than or equal to the target time, outputting alarm information.
7. The water level early warning method of any one of claims 1 to 6, further comprising:
judging whether a power shutdown allowing signal exists or not;
and if the power shutdown allowing signal does not exist, the step of obtaining the indication value and the change rate of the indication value of the water level measurement control signal of the steam generator is executed.
8. A water level early warning apparatus of a steam generator, comprising:
the indicated value acquisition module is used for acquiring an indicated value and an indicated value change rate of a water level measurement control signal of the steam generator;
the indicated value detection module is used for detecting the change direction of the change rate of the indicated value, wherein the change direction comprises positive and negative, the positive change direction indicates that the water level of the steam generator rises, and the negative change direction indicates that the water level of the steam generator falls;
the power detection module is used for detecting whether the reactor power is larger than a power threshold value;
a first time determination module, configured to, if a change direction of the indicated value change rate is positive and the reactor power is greater than a power threshold, obtain a water level high fixed value, where the water level high fixed value is used to indicate that a steam generator is about to be filled, determine and display a first reactor shutdown countdown time according to the water level high fixed value, the indicated value, and the indicated value change rate, where the first reactor shutdown countdown time is a time taken for a water level in the steam generator to reach the water level high fixed value;
and the second time determination module is used for acquiring a first water level low fixed value if the change direction of the indicated value change rate is negative, wherein the first water level low fixed value is used for indicating that the steam generator is about to be emptied, and determining and displaying a second reactor shutdown countdown time according to the first water level low fixed value, the indicated value and the indicated value change rate, wherein the second reactor shutdown countdown time is when the water level in the steam generator reaches the first water level low fixed value, and the first water level low fixed value is smaller than the water level high fixed value.
9. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the water level warning method according to any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored, which, when being executed by a processor, implements the water level warning method according to any one of claims 1 to 7.
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