CN112396015B - Supercooling signal identification method and device for nuclear power unit of nuclear power plant - Google Patents
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Abstract
The application provides a supercooling signal identification method and device for a nuclear power unit of a nuclear power plant, wherein the nuclear power unit comprises N loops and M devices, and the signal identification method comprises the following steps: acquiring first temperature values of N loops; acquiring second temperature values of M devices; when the difference value between the first temperature value and the second temperature value meets a first threshold condition, the nuclear power unit generates a supercooling signal; the supercooled signal is displayed on a display device. According to the method, whether the nuclear power unit generates the supercooling signal is characterized by respectively acquiring the difference value of the two loop temperature values of the nuclear power unit, and the supercooling signal is displayed on the display device, so that an operator is assisted to further determine whether the supercooling signal is generated truly.
Description
Technical Field
The application relates to the technical field of aging management of nuclear power plants, in particular to a supercooling signal identification method and device for a nuclear power unit of a nuclear power plant.
Background
The nuclear power control system of the nuclear power unit is an important component of the nuclear power plant, and the safe and reliable economic operation of the nuclear power unit is greatly dependent on the performance level of the control system of the nuclear power unit. The control system of the existing nuclear power unit comprises a monitoring subsystem, a diagnosis subsystem, a server, a communication subsystem, an execution subsystem and the like of the nuclear power unit. The main function of the diagnosis subsystem of the existing nuclear power unit is to diagnose the functional state of equipment of the nuclear power unit, so that operators can know whether the safety function, the control function and the alarm function of the equipment are abnormal or not, and operators can perform corresponding treatment.
At present, during the operation of equipment of a nuclear power plant, due to aging of components of the nuclear power unit, an analog circuit generates a signal, but cannot judge whether the signal is true or false. Under the general condition, operators of the nuclear power station check a plurality of instruments or phenomena of the nuclear power unit one by one according to experience to judge whether the signals are true or false, but the scheme has large workload, and can not judge whether the signals are true or false in a short time, and can not respond to abnormal alarms in time, so that the equipment operation safety of the nuclear power station is threatened.
Disclosure of Invention
In view of the above, the invention provides a supercooling signal identification method and device for a nuclear power unit of a nuclear power plant, which are used for representing whether the nuclear power unit generates a supercooling signal by using a method of utilizing a difference value of temperature values of two loops of the nuclear power unit, and displaying the supercooling signal on equipment to assist an operator in accurately judging signals.
In a first aspect, a supercooling signal identifying method for a nuclear power unit is provided, the nuclear power unit includes N loops, M devices and a display device, the signal identifying method includes: acquiring first temperature values of N loops; acquiring second temperature values of M devices; when the difference value of the first temperature value and the second temperature value meets a first threshold condition, the nuclear power unit generates a supercooling signal; the supercooled signal is displayed on a display device.
According to the supercooling signal identification method, whether the supercooling signal is generated by the nuclear power unit is represented by a method of respectively collecting difference values of two loop temperature values of the nuclear power unit, the supercooling signal is displayed on a display device, and an operator is assisted to further determine whether the supercooling signal is generated truly or not. The auxiliary operator judges the true and false supercooling signals, can rapidly perform subsequent operation of the false supercooling signals, reduces load dump depth, reduces transient disturbance of the unit, and ensures stable operation of the unit.
In a possible implementation manner of the first aspect, acquiring first temperature values of N loops includes: acquiring N first initial temperature values corresponding to the N loops respectively; processing the minimum temperature value in the N first initial temperature values through a first transfer function to obtain an intermediate temperature value; and processing the intermediate temperature value through a second transfer function to obtain a first temperature value. In this implementation, the N initial temperature values refer to a plurality of average temperature values of a plurality of loops in a loop, wherein the plurality of average temperature values are taken from a loop temperature probe for protection. And carrying out inertial processing on the minimum value in the plurality of average temperature values through a first function to realize a loop average temperature minimum value filtering signal. The lead-lag function required by the design requirement of the regulation characteristic is obtained by performing second transfer function processing on the average temperature minimum value filtered signal.
In a possible implementation manner of the first aspect, the first transfer function isWherein T represents a first time period, p represents a minimum temperature value of the N first initial temperature values, y 1 Indicating an intermediate temperature value. The second transfer function isWherein T is 1 Representing a second period of time, T 2 Representing a third time period, y 2 Representing the first temperature value. T, T in this implementation 1 、T 2 And the two formulas are processed to realize the function of generating the same effect by the instrument control loop.
In a possible implementation manner of the first aspect, obtaining second temperature values of M devices includes: obtaining M power values corresponding to the M devices respectively; and converting the maximum power value in the M power values into a second temperature value according to a second threshold condition. In this implementation, the second temperature value setting conversion does not go through a function generator in the instrumentation loop, but rather directly performs the function conversion in the system interface.
In a possible implementation manner of the first aspect, the second threshold condition includes: when P < 100FN, t=0.186×p; or when P is greater than or equal to 100FN, t=310 ℃; wherein P represents the maximum power of the M powers and T represents the second temperature value.
In a possible implementation manner of the first aspect, the first threshold condition includes: when P is less than or equal to 43FN, deltaT is more than or equal to 0.186 xP; or when 43FN < P is less than or equal to 90FN, deltaT is more than or equal to 10; or when 90FN < P is less than or equal to 100FN, deltaT is more than or equal to 0.7XP; or when P > 100FN, deltaT is more than or equal to 3; where P represents the maximum power of the M powers and Δt represents the difference between the first temperature value and the second temperature value.
In a second aspect, a supercooling signal recognition apparatus is provided, which comprises means for performing the above first aspect or any of the possible implementations of the first aspect.
In a third aspect, a supercooling signal recognition apparatus is provided, the apparatus comprising at least one processor and a memory, the at least one processor being configured to perform the method of the first aspect above or any possible implementation of the first aspect.
In a fourth aspect, a supercooling signal recognition apparatus is provided, the supercooling signal recognition apparatus comprising at least one processor and interface circuitry, the at least one processor being configured to perform the above method of the first aspect or any of the possible implementation forms of the first aspect.
In a fifth aspect, a supercooling signal recognition apparatus is provided, which includes any one of the supercooling signal recognition devices provided in the second, third or fourth aspects above.
In a sixth aspect, a computer program product is provided, comprising a computer program for performing the method of the first aspect or any possible implementation of the first aspect when being executed by a processor.
In a seventh aspect, a computer readable storage medium is provided, in which a computer program is stored which, when executed, is adapted to carry out the method of the first aspect or any of the possible implementations of the first aspect.
In an eighth aspect, there is provided a chip or integrated circuit comprising: a processor for calling and running a computer program from a memory, such that a device on which the chip or integrated circuit is mounted performs the method of the first aspect or any possible implementation of the first aspect.
The technical effects of the apparatus provided in the present application may be referred to the technical effects of the first aspect or each implementation manner of the first aspect, which are not described herein again.
Compared with the prior art, the invention has the beneficial effects that:
according to the supercooling signal identification method, whether the supercooling signal is generated by the nuclear power unit is represented by a method of respectively collecting difference values of two loop temperature values of the nuclear power unit, the supercooling signal is displayed on a display device, and an operator is assisted to further determine whether the supercooling signal is generated truly or not. The auxiliary operator judges the true and false supercooling signals, can rapidly perform subsequent operation of the false supercooling signals, reduces load dump depth, reduces transient disturbance of the unit, and ensures stable operation of the unit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic implementation flow chart of a supercooling signal identifying method 100 according to an embodiment of the present application;
fig. 2 shows a schematic block diagram of a supercooling signal recognition apparatus 200 provided in an embodiment of the present application;
fig. 3 shows a schematic block diagram of a supercooling signal recognition apparatus 300 provided in an embodiment of the present application.
Detailed Description
With the increase of the running time of the unit, the related instrument control components age, the probability of faults is increased, especially, the number of instrument control loop components generating supercooling signals is large, and the faults of any intermediate component can possibly cause false supercooling signal triggering. The real temperature of a loop of the unit is taken from a protection probe used for control by a loop temperature measurement bypass, or the temperature of the two loops is converted by a function generator in a meter control loop. The temperature acquired by the probe is converted by a series of instrument control components, a function generator and the like, and a false supercooling signal can be generated.
Based on the above problems, in order to prevent false supercooling caused by faults of a series of components such as the probe, the instrument control component, the function generator and the like and influence the judgment of operators, the numerical value in the supercooling signal identification method provided by the invention avoids the components as much as possible, and when false supercooling signals are generated by faults of the probe, the instrument control component and the relay, the false supercooling signals can be intelligently identified by the signal identification method.
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
First, before describing embodiments of a method and apparatus for supercooling signal recognition provided in the present application, some terms to be mentioned later will be described. The volumetric terms "first," "second," and the like, when used herein, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
These and other aspects of embodiments of the invention will be apparent from and elucidated with reference to the description and drawings described hereinafter. In the description and drawings, particular implementations of embodiments of the invention are disclosed in detail as being indicative of some of the ways in which the principles of embodiments of the invention may be employed, but it is understood that the scope of the embodiments of the invention is not limited correspondingly. On the contrary, the embodiments of the invention include all alternatives, modifications and equivalents as may be included within the spirit and scope of the appended claims.
The method for identifying supercooling signals provided in the present application is described below with reference to specific embodiments.
Referring to fig. 1, a flowchart of one embodiment of a method for supercooling signal identification is provided. As shown in fig. 1, the supercooling signal recognition method 100 includes S101 to S104.
S101, acquiring first temperature values of the N loops;
the M310 unit comprises a loop and two loops, wherein the loop comprises N loops, and the two loops comprise M devices. The acquisition of the N loop probes of the first loop and the M device data of the second loop uses independent meters.
Illustratively, in the embodiment of the present application, a loop includes 3 loops, and a first temperature value of the three loops is obtained. The first temperature value is obtained by processing a loop probe taken from the protection. Obtained by the instruments RCP030MT, 033MT, RCP045MT, RCP048MT, RCP057MT and RCP060MT, wherein the RCP030MT, 033MT, RCP045MT, RCP048MT, RCP057MT and RCP060MT represent the instrument model.
Optionally, in the embodiment of the present application, 3 first initial temperature values corresponding to the 3 loops are obtained respectively; the first initial temperature value refers to average temperature values corresponding to 3 loops respectively, wherein the average temperature values are taken from a loop temperature probe for protection. Processing the minimum temperature values of the average temperature values corresponding to the 3 loops respectively through a first transfer function to obtain an intermediate temperature value; the first function means
Wherein T represents a constant, in the embodiment of the application, 1 second, p represents the minimum temperature value in the initial temperature values corresponding to the 3 loops respectively, y 1 Indicating an intermediate temperature value. The intermediate temperature value represents inertia of the minimum temperature valueAnd (5) a temperature value after treatment. Filtering the signal by the average temperature minimum is achieved.
Optionally, the intermediate temperature value is processed through a second transfer function to obtain the first temperature value. The second function means
In the embodiment of the application, T 1 Representation 20 S ，T 2 Represent 10s, y 1 Represents an intermediate temperature value, y 2 The first temperature value is represented by performing the lead-lag processing on the inertia-processed temperature value. And performing second transfer function processing to obtain the lead-lag function required by the design requirement of the regulation characteristic.
S102, acquiring second temperature values of the M devices;
illustratively, in the embodiment of the application, the two-loop comprises 2 devices, and the second temperature value in the 2 devices is acquired through the meter GPV004/005 MP. The second temperature value is obtained by performing function conversion in the system without going through a function generator in the instrument control loop.
Optionally, in the embodiment of the present application, 2 power values corresponding to the 2 devices respectively are obtained; and converting the maximum power value in the 2 power values into a second temperature value according to a second threshold condition. The second temperature value refers to a temperature set point. The second threshold condition in the embodiment of the present application is that when P < 100FN, t=0.186×p; or when P is greater than or equal to 100FN, t=310 ℃; wherein P represents the maximum power of the 2 powers and T represents the second temperature value. The second temperature value setting conversion is not performed by a function generator in the instrument control loop, but is performed directly in a system interface.
Alternatively, the power value may be obtained by converting the pressure-load percentage, where-4.437-73.845 bar.a corresponds to 0-120% fn, and the specific correspondence is specific, and the embodiment of the present application is not limited.
S103, when the difference value of the first temperature value and the second temperature value meets a first threshold condition, generating a supercooling signal by the nuclear power unit;
optionally, the first threshold condition in the embodiment of the present application refers to: when P is less than or equal to 43FN, deltaT is more than or equal to 0.186 xP; or when 43FN < P is less than or equal to 90FN, deltaT is more than or equal to 10; or when 90FN < P is less than or equal to 100FN, deltaT is more than or equal to 0.7XP; or when P > 100FN, deltaT is more than or equal to 3; wherein P represents the maximum power of the M powers, Δt represents the difference between the first temperature value and the second temperature value.
And S104, displaying the supercooled signal on a display device.
In this embodiment, when the difference between the temperature value after the lead-lag process and the temperature value after the maximum power conversion satisfies the above threshold condition, it indicates that the nuclear power unit generates a supercooling signal, and the supercooling signal is displayed on the display device. The combination of the supercooling signal of the instrument control loop can judge whether the unit generates a real supercooling signal.
According to the supercooling signal identification method, whether the supercooling signal is generated by the nuclear power unit is represented by a method of respectively collecting difference values of two loop temperature values of the nuclear power unit, the supercooling signal is displayed on a display device, and an operator is assisted to further determine whether the supercooling signal is generated truly or not. The auxiliary operator judges the true and false supercooling signals, can rapidly perform subsequent operation of the false supercooling signals, reduces load dump depth, reduces transient disturbance of the unit, and ensures stable operation of the unit.
Optionally, the display device provided in the embodiment of the present application further includes specific data for acquiring the supercooling signal generated by the control loop, where the average temperature of the control loop is acquired by the instruments RCP032MT, 035mt, RCP047MT, RCP050MT, RCP059MT, and RCP 062M. The second loop data of the instrument control loop is acquired through the instrument GRE023/024 MP. The supercooling signal generated by the instrument control loop is used for judging whether to generate a real supercooling signal together with the supercooling signal identification method of the scheme.
Optionally, in the embodiment of the present application, before the final result of whether to generate the supercooling signal is finally presented, a plurality of internal variables are further added, so that each fine link can be ensured to be controlled, and faults are removed, so that the obtained signal result is more accurate.
Fig. 2 is a schematic block diagram of an apparatus 200 provided in an embodiment of the present application, the apparatus 200 including a processing unit 201 and a display device 202.
A processing unit 201, configured to obtain 3 first initial temperature values corresponding to the 3 loops respectively; processing the minimum temperature value in the 3 first initial temperature values through a first transfer function to obtain an intermediate temperature value; and processing the intermediate temperature value through a second transfer function to obtain a first temperature value. 2 power values corresponding to the 2 devices respectively are obtained; and converting the maximum power value in the 2 power values into a second temperature value according to a second threshold condition. And determining whether a difference between the temperature value after the lead-lag processing and the temperature value after the maximum power conversion satisfies a first threshold condition.
The display unit 202 is configured to display the supercooled signal obtained through the instrument control loop and the supercooled signal obtained through the judgment of the present embodiment. If the condition is met, a supercooling signal is generated, the supercooling signal is displayed on a display device, and whether the unit generates a real supercooling signal is judged by combining the supercooling signal of the instrument control loop. The display unit includes a display panel, which may be optionally configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an Organic Light-Emitting Diode (OLED), or the like.
It should be appreciated that the apparatus 200 of the embodiments of the present application may be implemented by an application specific integrated circuit (application-specific integrated circuit, ASIC), a programmable logic device (programmable logic device, PLD), which may be a complex program logic device (complex programmable logical device, CPLD), a field-programmable gate array (field-programmable gate array, FPGA), a general-purpose array logic (generic array logic, GAL), or any combination thereof. The supercooling signal recognition method of fig. 1 may be implemented by software, and when the supercooling signal recognition method of fig. 1 is implemented by software, the apparatus 200 and its respective modules may be software modules.
Fig. 3 is a schematic diagram of a supercooling signal identifying apparatus according to an embodiment of the present application. As shown in fig. 3, the apparatus 300 includes a processor 301, a memory 302, a communication interface 303, and a bus 304. The processor 301, the memory 302, and the communication interface 303 communicate via the bus 304, or may communicate via other means such as wireless transmission. The memory 302 is used for storing instructions and the processor 301 is used for executing the instructions stored by the memory 302. The memory 302 stores program code 3021, and the processor 301 may call the program code 3021 stored in the memory 302 to execute the supercooling signal identifying method shown in fig. 1.
It should be appreciated that in embodiments of the present application, the processor 301 may be a CPU, and the processor 301 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 any conventional processor or the like.
The memory 302 may include read only memory and random access memory and provides instructions and data to the processor 301. Memory 302 may also include non-volatile random access memory. The memory 302 may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), and direct memory bus RAM (DR RAM).
The bus 304 may include a power bus, a control bus, a status signal bus, and the like in addition to a data bus. But for clarity of illustration the various buses are labeled as bus 304 in fig. 3.
The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded or executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired (e.g., coaxial cable, optical fiber, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more sets of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk (solid state drive, SSD).
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (8)
1. The supercooling signal identification method for a nuclear power unit of a nuclear power plant is characterized in that the nuclear power unit comprises N loops, M devices and a display device, the N loops belong to one loop, the M devices belong to two loops, and the method comprises the following steps:
acquiring N first initial temperature values corresponding to the N loops respectively;
processing the minimum temperature value in the N first initial temperature values through a first transfer function to obtain an intermediate temperature value;
processing the intermediate temperature value through a second transfer function to obtain first temperature values of the N loops;
obtaining M power values corresponding to the M devices respectively;
converting the maximum power value of the M power values into a second temperature value of the M devices according to a second threshold condition;
when the difference value between the first temperature value and the second temperature value meets a first threshold condition, the nuclear power unit generates the supercooling signal;
displaying the supercooled signal on the display device.
2. The supercooling signal recognition method of claim 1, wherein:
the first transfer function isWherein T represents a first time period, p represents a minimum temperature value of the N first initial temperature values, y 1 Representing the intermediate temperature value;
the second transfer function isWherein the method comprises the steps of，T 1 Representing a second period of time, T 2 Representing a third time period, y 2 Representing the first temperature value.
3. The supercooling signal identifying method according to claim 1 or 2, characterized in that the second threshold condition includes:
when P < 100FN, t=0.186×p; or alternatively
When P is greater than or equal to 100FN, t=310 ℃; wherein P represents the maximum power of the M power values, and T represents the second temperature value.
4. The supercooling signal identifying method of claim 2, wherein the first threshold condition includes:
when P is less than or equal to 43FN, deltaT is more than or equal to 0.186 xP; or alternatively
When 43FN < P is less than or equal to 90FN, delta T is more than or equal to 10; or alternatively
When 90FN < P is less than or equal to 100FN, delta T is more than or equal to 0.7 xP; or alternatively
When P is more than 100FN, delta T is more than or equal to 3; wherein P represents the maximum power of the M power values, and Δt represents the difference between the first temperature value and the second temperature value.
5. A supercooling signal recognition apparatus, characterized by comprising means for performing the supercooling signal recognition method according to any one of claims 1 to 4.
6. A supercooling signal recognition apparatus, comprising at least one processor coupled to at least one memory;
the at least one processor configured to execute a computer program or instructions stored in the at least one memory to cause the apparatus to perform the signal recognition method of any one of claims 1 to 4.
7. A computer-readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method according to any one of claims 1 to 4.
8. A chip, comprising: a processor for calling and running a computer program from a memory, causing a signal recognition device on which the chip is mounted to perform the method of any one of claims 1 to 4.
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