CN112396015A - Supercooling signal identification method and device for nuclear power unit of nuclear power station - Google Patents
Supercooling signal identification method and device for nuclear power unit of nuclear power station Download PDFInfo
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Abstract
The application provides a supercooling signal identification method and device for a nuclear power unit of a nuclear power station, 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 the 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 subcooling signal is displayed on a display device. According to the method, whether the nuclear power unit generates the supercooling signal or not is represented by a method of respectively acquiring the difference value of the temperature values of the two loops 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 really or not.
Description
Technical Field
The application relates to the technical field of nuclear power station aging management, in particular to a supercooling signal identification method and device for a nuclear power unit of a nuclear power station.
Background
The nuclear power control system of the nuclear power unit is an important component of the nuclear power plant, and the safe, reliable and economic operation of the nuclear power unit depends on the performance level of the control system of the nuclear power unit to a great extent. The control system of the existing nuclear power generating unit comprises a monitoring subsystem, a diagnosis subsystem, a server, a communication subsystem, an execution subsystem and the like of the nuclear power generating unit. The diagnosis subsystem of the existing nuclear power generating unit has the main function of diagnosing the functional state of equipment of the nuclear power generating 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, in the operation process of equipment of a nuclear power station, due to the aging of nuclear power unit components, although a signal is generated by an analog circuit, whether the signal is true or false cannot be judged. Generally, 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 signal is true or false, but the scheme has large workload, cannot judge whether the signal is true or false in a short time, and cannot respond to abnormal alarm in time, so that the threat to the equipment operation safety of the nuclear power station is caused.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for identifying a supercooling signal of a nuclear power unit of a nuclear power plant, which are used for indicating whether the nuclear power unit generates a supercooling signal by using a method of using a difference value between temperature values of two loops of the nuclear power unit, and displaying the supercooling signal on a device to assist an operator in accurately judging the signal.
In a first aspect, a supercooling signal identification method for a nuclear power unit is provided, the nuclear power unit comprises N loops, M devices and a display device, and the signal identification method comprises the following steps: acquiring first temperature values of N loops; acquiring second temperature values of the M devices; when the difference value of the first temperature value and the second temperature value meets a first threshold value condition, the nuclear power unit generates a supercooling signal; the subcooling signal is displayed on a display device.
According to the identification method of the supercooling signal, whether the nuclear power unit generates the supercooling signal or not is represented by a method of respectively acquiring the difference value of the temperature values of the two loops 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 really or not in such a way. The auxiliary operator judges the true and false supercooling signals, can quickly perform subsequent operation of the false supercooling signals, reduces the load shedding depth, reduces transient disturbance of the unit and ensures stable operation of the unit.
In a possible implementation method of the first aspect, obtaining first temperature values of the N loops includes: acquiring N first initial temperature values respectively corresponding to the N loops; 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 obtained from a loop temperature probe for protection. And carrying out inertia processing on the minimum value in the average temperature values through a first function to realize a loop average temperature minimum value filtering signal. And performing second transfer function processing on the average temperature minimum value filtering signal to obtain a lead-lag function required by the design requirement of the regulation characteristic.
In a possible implementation of the first aspect, the first transfer function is
Wherein T represents a first time period, p represents a minimum temperature value of the N first initial temperature values, y1Representing an interim temperature value. The second transfer function is
Wherein, T1Denotes a second time period, T2Denotes a third time period, y2Representing the first temperature value. In this implementation, T, T1、T2And the two equations are used for processing to realize the function that the instrument control loop generates the same effect.
In a possible implementation method of the first aspect, obtaining second temperature values of the M devices includes: obtaining M power values respectively corresponding to M devices; a maximum power value of the M power values is converted to a second temperature value according to a second threshold condition. In this implementation, the second temperature value setting transformation does not pass through a function generator in the instrument control loop, but directly performs function transformation in the system interface.
In a possible implementation method of the first aspect, the second threshold condition includes: when P < 100FN, T is 0.186 × P; or when P is more than or equal to 100FN, T is 310 ℃; wherein P represents a maximum power among the M powers, and T represents a second temperature value.
In a possible implementation method of the first aspect, the first threshold condition includes: when P is less than or equal to 43FN, the delta T is more than or equal to 0.186 multiplied by P; or when the P is more than 43FN and less than or equal to 90FN, the delta T is more than or equal to 10; or when P is more than 90FN and less than or equal to 100FN, the delta T is more than or equal to 0.7 multiplied by P; or when P is more than 100FN, the delta T is more than or equal to 3; wherein P represents a maximum power among the M powers, and Δ T represents a difference between the first temperature value and the second temperature value.
In a second aspect, a supercooling signal identification apparatus is provided, which includes a possible implementation method for performing the above first aspect or any one of the above first aspects.
In a third aspect, a supercooling signal identification apparatus is provided, which includes at least one processor and a memory, the at least one processor being configured to perform the method of the above first aspect or any possible implementation manner of the first aspect.
In a fourth aspect, a supercooling signal identifying apparatus is provided, which includes at least one processor and an interface circuit, the at least one processor being configured to perform the method of the above first aspect or any possible implementation manner of the first aspect.
In a fifth aspect, a supercooling signal identifying apparatus is provided, which includes any of the supercooling signal identifying means provided in the second, third or fourth aspect.
A sixth aspect provides a computer program product comprising a computer program for performing the method of the first aspect or any possible implementation form of the first aspect when 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 perform the method of the first aspect or any possible implementation manner of the first aspect.
In an eighth aspect, there is provided a chip or an integrated circuit, comprising: a processor configured to invoke and run the computer program from the memory, so that the device on which the chip or the integrated circuit is installed performs the method of the first aspect or any possible implementation manner of the first aspect.
For technical effects of the apparatus provided by the present application, reference may be made to the technical effects of the first aspect or each implementation manner of the first aspect, and details are not described here.
Compared with the prior art, the invention has the beneficial effects that:
according to the identification method of the supercooling signal, whether the nuclear power unit generates the supercooling signal or not is represented by a method of respectively acquiring the difference value of the temperature values of the two loops 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 really or not in such a way. The auxiliary operator judges the true and false supercooling signals, can quickly perform subsequent operation of the false supercooling signals, reduces the load shedding depth, reduces transient disturbance of the unit and ensures stable operation of the unit.
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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 flow chart illustrating an implementation of a supercooling signal identification method 100 provided by an embodiment of the present application;
fig. 2 shows a schematic block diagram of a supercooling signal identification apparatus 200 provided by an embodiment of the present application;
fig. 3 shows a schematic block diagram of a supercooling signal identification apparatus 300 according to an embodiment of the present application.
Detailed Description
Along with the increase of the running time of the unit, the related instrument control components age, the probability of failure is increased, particularly, the number of instrument control loop components generating supercooling signals is large, any one intermediate component fails, and false supercooling signal triggering can be caused. The real temperature of a primary loop of the unit is taken from a protection probe used for controlling a primary loop temperature measuring bypass, or the temperature of a secondary loop is converted through a function generator in an instrument control loop. The temperature collected by the probe is converted by a series of instrument control components, function generators and the like, and a false supercooling signal can be generated.
Based on the 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 judgment of an operator, numerical values in the supercooling signal identification method provided by the invention avoid the components as much as possible, and when false supercooling signals are generated due to faults of the probe, the instrument control component and the relay, intelligent identification of the false supercooling signals can be carried out through the signal identification method.
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
First, before describing embodiments of the method and apparatus for supercooling signal identification provided in the present application, some terms to be mentioned immediately below will be described. The use of the ordinal terms "first", "second", etc., in the present application is for descriptive purposes only and is not to be construed as indicating or implying relative importance or an implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present application, "a plurality" means two or more unless otherwise specified.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, 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 changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
The method for supercooling signal identification provided by the present application is exemplified below with reference to specific embodiments.
Referring to fig. 1, a flow chart of one embodiment of a method of subcooling signal identification is provided herein. As shown in fig. 1, the supercooling signal identification method 100 includes S101 to S104.
S101, acquiring first temperature values of the N loops;
the M310 unit comprises a first loop and a second loop, wherein the first loop comprises N loops, and the second loop comprises M devices. The probes of the N loops of the first loop and the M pieces of equipment data of the second loop are acquired by using independent meters.
For example, in the embodiment of the present application, a loop includes 3 loops, and the first temperature values in the three loops are obtained. The first temperature value is obtained by processing a loop probe taken from protection. The data are acquired by the instruments RCP030MT, 033MT, RCP045MT, RCP048MT, RCP057MT and RCP060MT, and the instruments RCP030MT, 033MT, RCP045MT, RCP048MT, RCP057MT and RCP060MT represent instrument models.
Optionally, in this embodiment of the present application, 3 first initial temperature values respectively corresponding to the 3 loops are obtained; the first initial temperature value is an average temperature value corresponding to each of the 3 loops, wherein the average temperature values are obtained from a loop temperature probe for protection. Processing the minimum temperature values of the average temperature values respectively corresponding to the 3 loops through a first transfer function to obtain intermediate temperature values; the first function is
Wherein T represents a constantIn the embodiment of the present application, 1 second, p represents the minimum temperature value among the initial temperature values respectively corresponding to the 3 loops, and y represents the minimum temperature value among the initial temperature values respectively corresponding to the 3 loops1Representing an interim temperature value. The interim temperature value represents the temperature value after the inertia processing of the minimum temperature value. Filtering the average temperature minimum is achieved.
Optionally, the intermediate temperature value is processed by a second transfer function to obtain a first temperature value. The second function is
Wherein, in the embodiment of the application, T1Is shown as 20S，T2Represents 10s, y1Representing the value of the intermediate temperature, y2And representing a first temperature value, wherein the first temperature value is subjected to lead-lag processing on the temperature value after inertia processing. And performing second transfer function processing to obtain a lead-lag function required by the design requirement of the regulation characteristic.
S102, acquiring second temperature values of the M devices;
for example, in the embodiment of the present application, the second loop includes 2 devices, and a second temperature value in the 2 devices is obtained through the GPV004/005MP meter. The second temperature value is obtained by performing function conversion in the system without passing through a function generator in the instrument control loop.
Optionally, in the embodiment of the present application, 2 power values corresponding to 2 devices are obtained; the maximum power value of the 2 power values is converted into a second temperature value according to a second threshold condition. The second temperature value is referred to as a temperature set point. The second threshold condition in the embodiment of the present application is that, when P < 100FN, T is 0.186 × P; or when P is more than or equal to 100FN, T is 310 ℃; wherein P represents a maximum power among the 2 powers, and T represents a second temperature value. The second temperature value is set to be converted, and function conversion is directly carried out in a system interface without a function generator in an instrument control loop.
Optionally, the power value may be obtained by converting the pressure-load percentage, where-4.437 to 73.845bar.a corresponds to 0 to 120% FN, and the specific correspondence is determined according to specific situations, which is not limited in the embodiments of the present application.
S103, 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;
optionally, the first threshold condition in the embodiment of the present application refers to: when P is less than or equal to 43FN, the delta T is more than or equal to 0.186 multiplied by P; or when the P is more than 43FN and less than or equal to 90FN, the delta T is more than or equal to 10; or when P is more than 90FN and less than or equal to 100FN, the delta T is more than or equal to 0.7 multiplied by P; or when P is more than 100FN, the delta T is more than or equal to 3; wherein P represents a maximum power among the M powers, and Δ T represents a difference between the first temperature value and the second temperature value.
And S104, displaying the supercooling signal on a display device.
In this embodiment, when the difference between the temperature value after the lead-lag processing and the temperature value after the maximum power conversion satisfies the threshold condition, it indicates that the nuclear power unit generates the supercooling signal, and the supercooling signal is displayed on the display device. And the supercooling signal of the instrument control loop is combined to judge whether the unit generates a real supercooling signal.
According to the identification method of the supercooling signal, whether the nuclear power unit generates the supercooling signal or not is represented by a method of respectively acquiring the difference value of the temperature values of the two loops 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 really or not in such a way. The auxiliary operator judges the true and false supercooling signals, can quickly perform subsequent operation of the false supercooling signals, reduces the load shedding depth, reduces transient disturbance of the unit and ensures stable operation of the unit.
Optionally, the display device provided in this embodiment of the present application further includes specific data showing that the supercooling signal generated by the instrumentation control loop is obtained, and the average temperature of the instrumentation control loop is obtained through the instruments RCP032MT, 035MT, RCP047MT, RCP050MT, RCP059MT, and RCP 062M. The data of the second loop of the instrument control loop is acquired through an instrument GRE023/024 MP. The supercooling signal generated by the instrument control loop is used for judging whether a real supercooling signal is generated or not together with the supercooling signal identification method of the scheme.
Optionally, in the embodiment of the present application, before the final result indicating whether the supercooling signal is generated is finally presented, a plurality of internal variables are additionally provided, so that it is ensured that each fine link is controlled and removed of the fault, and 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, where the apparatus 200 includes a processing unit 201 and a display device 202.
The processing unit 201 is 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. Obtaining 2 power values corresponding to 2 devices respectively; the maximum power value of the 2 power values is converted into a second temperature value according to a second threshold condition. And judging whether the difference value between the temperature value after the lead-lag processing and the temperature value after the maximum power conversion meets a first threshold condition.
And the display unit 202 is used for displaying the supercooling signal obtained by the instrument control loop and the supercooling signal judged by the scheme. And if the condition is met, generating a supercooling signal, displaying the supercooling signal on a display device, and judging whether the unit generates a real supercooling signal or not by combining the supercooling signal of the instrument control loop. The Display unit includes a Display panel, and optionally, the Display panel may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
It should be understood that the apparatus 200 of the embodiment of the present application may be implemented by an application-specific integrated circuit (ASIC), or a Programmable Logic Device (PLD), which may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof. The supercooling signal identification method shown in fig. 1 may be implemented by software, and when the supercooling signal identification method shown in fig. 1 is implemented by software, the apparatus 200 and its respective modules may also be software modules.
Fig. 3 is a schematic diagram of a supercooling signal identification 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 with each other via a bus 304, or may communicate with each other 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 perform the supercooling signal identifying method shown in fig. 1.
It should be understood that in the 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, and the like. A general purpose processor may be a microprocessor or any conventional processor or the like.
The memory 302 may include both read-only memory and random access memory, and provides instructions and data to the processor 301. The memory 302 may also include non-volatile random access memory. The memory 302 may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile 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. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (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 synchronous SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and direct 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 busses are labeled in figure 3 as busses 304.
The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. 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, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can 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 collections 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 Drive (SSD).
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting 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 supercooling signal identification method for a nuclear power unit of a nuclear power station, wherein the nuclear power unit comprises N loops, M devices and a display device, and the method comprises the following steps:
acquiring first temperature values of the N loops;
acquiring second temperature values of the M devices;
when the difference value between the first temperature value and the second temperature value meets the first threshold condition, the nuclear power unit generates the supercooling signal;
displaying the subcooling signal on the display device.
2. A subcooling signal identification method as described in claim 1, wherein said obtaining a first temperature value for said N loops comprises:
acquiring N first initial temperature values respectively corresponding to the N loops;
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.
3. A supercooling signal identifying method according to claim 2, wherein:
the first transfer function is
Wherein T represents a first time period, and p represents a minimum temperature value of the N first initial temperature values，y1Representing the interim temperature value;
the second transfer function is
Wherein, T1Denotes a second time period, T2Denotes a third time period, y2Representing the first temperature value.
4. A supercooling signal identifying method of claim 1, wherein the obtaining the second temperature values of the M devices comprises:
obtaining M power values respectively corresponding to the M devices;
converting a maximum power value of the M power values to the second temperature value according to a second threshold condition.
5. A subcooling signal identification method as described in claim 4, wherein the second threshold condition comprises:
when P < 100FN, T is 0.186 × P; or
When P is more than or equal to 100FN, T is 310 ℃; wherein P represents a maximum power among the M powers, and T represents the second temperature value.
6. A subcooling signal identification method as described in claim 1, wherein the first threshold condition comprises:
when P is less than or equal to 43FN, the delta T is more than or equal to 0.186 multiplied by P; or
When P is more than 43FN and less than or equal to 90FN, delta T is more than or equal to 10; or
When P is more than 90FN and less than or equal to 100FN, delta T is more than or equal to 0.7 multiplied by P; or
When P is more than 100FN, delta T is more than or equal to 3; wherein P represents a maximum power among the M powers, and Δ T represents a difference between the first temperature value and the second temperature value.
7. A supercooling signal identifying apparatus, comprising a unit for performing the supercooling signal identifying method according to any one of claims 1 to 6.
8. A subcooling signal identification device, wherein the device comprises at least one processor coupled to at least one memory;
the at least one processor configured to execute computer programs or instructions stored in the at least one memory to cause the apparatus to perform the signal identification method of any of claims 1 to 6.
9. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.
10. A chip, comprising: a processor for calling and running a computer program from a memory so that a signal recognition apparatus in which the chip is installed performs the method according to any one of claims 1 to 6.
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