CN110277181B - Method and device for monitoring water level of pressure vessel of nuclear power station - Google Patents
Method and device for monitoring water level of pressure vessel of nuclear power station Download PDFInfo
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- CN110277181B CN110277181B CN201910532304.5A CN201910532304A CN110277181B CN 110277181 B CN110277181 B CN 110277181B CN 201910532304 A CN201910532304 A CN 201910532304A CN 110277181 B CN110277181 B CN 110277181B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/02—Devices or arrangements for monitoring coolant or moderator
- G21C17/022—Devices or arrangements for monitoring coolant or moderator for monitoring liquid coolants or moderators
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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 relates to the technical field of nuclear power station reactor core measuring systems, in particular to a method and a device for monitoring the water level of a pressure vessel of a nuclear power station. And determining the water level of the pressure container according to the input parameters when the measured value of the narrow-range instrument is effective, and determining the water level of the pressure container according to the effectiveness of the measured value of the wide-range instrument when the measured value of the narrow-range instrument is ineffective. In practical application, the effective signal of the measured value of the narrow-range instrument is more stable than the feedback signal of the main pump, and the wrong effective signal can not be output due to system tripping, power failure and the like, so that the scheme adopts the effectiveness of the measured value of the narrow-range instrument as the basis of the system output measured value, and compared with the traditional scheme of adopting the feedback signal of the main pump as the basis of the system output measured value, the pressure container water level measured by the pressure container monitoring method provided by the scheme is more accurate, and errors can not occur.
Description
Technical Field
The application relates to the technical field of nuclear power station reactor core measuring systems, in particular to a method and a device for monitoring the water level of a pressure vessel of a nuclear power station.
Background
The Core Cooling Monitoring System (CCMS) of a nuclear power plant has the main functions of acquiring temperature/pressure/liquid level signals in a Core, and finally obtaining the state of the Core through calculation, wherein the Core Cooling Monitoring System comprises two main parameters: the core saturation temperature margin and the core liquid level are important parameters for monitoring the core.
At present, the measurement of the reactor core liquid level by using the CCMS is mainly the measurement of the pressure vessel water level (LSVL), and specifically includes: the measuring method comprises a narrow range measuring method and a wide range measuring method. The switching of the two existing measurement results is switched according to whether the main pump operates, namely, when the CCMS receives a main pump feedback signal, the CCMS correspondingly selects to output and display a narrow-range measurement result or a wide-range measurement result according to the main pump feedback signal. For example, if the main pump feedback signal indicates that the main pump normally operates, the wide-range measurement result is output and displayed by the CCMS, and if the main pump feedback signal indicates that the main pump does not normally operate, the narrow-range measurement result is output and displayed by the CCMS.
However, the above-mentioned method for measuring the water level of the pressure container has problems of measurement error or measurement inaccuracy.
Disclosure of Invention
In view of the above, there is a need to provide a method, an apparatus, a computer device and a storage medium for monitoring the water level of a pressure vessel of a nuclear power plant, which can effectively improve the measurement accuracy.
In a first aspect, a method for monitoring the water level of a pressure vessel of a nuclear power plant comprises the following steps:
judging whether the measured value of the narrow-range instrument is effective or not; if the measured value of the narrow-range instrument is valid, determining the water level of the pressure container according to the input parameters; the input parameters are used for representing the attribute and state information of the pressure container; and if the measured value of the narrow-range meter is invalid, determining the water level of the pressure container according to the validity of the measured value of the wide-range meter.
In one embodiment, the determining the pressure vessel water level based on the input parameter comprises: judging whether the input parameters are valid; if the input parameters are valid, acquiring a pressure vessel measurement pressure difference value in the input parameters, and determining the water level of the pressure vessel according to the pressure vessel measurement pressure difference value; and if the input parameters are invalid, taking the water level of the pressure container measured at the last moment as the water level of the pressure container.
In one embodiment, the obtaining the measured differential pressure value of the pressure vessel includes: acquiring a differential pressure correction value, a reference differential pressure value and a loop relative pressure of the narrow-range instrument; and obtaining a pressure vessel measurement differential pressure value according to the differential pressure correction value of the narrow-range instrument, the reference differential pressure value and the loop relative pressure.
In one embodiment, the obtaining of the measured differential pressure value of the pressure vessel according to the differential pressure correction value of the narrow-range meter, the reference differential pressure value and the relative pressure of the primary circuit includes: determining a corrected pressure vessel measurement pressure difference value according to the pressure difference correction value of the narrow-range instrument and the relative pressure of a primary circuit; determining a correction factor according to the relative pressure of a loop; and determining the pressure vessel measured pressure difference value according to the corrected pressure vessel measured pressure difference value, the correction factor and the reference pressure difference value.
In one embodiment, the determining the pressure vessel water level based on the validity of the measurement of the wide range meter comprises: judging whether the measurement value of the wide-range instrument is effective or not; if the measured value of the wide-range meter is valid, determining the water level of the pressure container according to the measured value of the wide-range meter and the measured range of the narrow-range meter; and if the measured value of the wide-range meter is invalid, taking the water level of the pressure container measured at the last moment as the water level of the pressure container.
In one embodiment, the determining the pressure vessel water level according to the measurement value of the wide-range meter and the measurement range of the narrow-range meter comprises: judging whether the measurement value of the wide-range instrument exceeds the measurement range of the narrow-range instrument; if the water level exceeds the preset water level, determining a preset water level mandatory value as the water level of the pressure container; and if the water level does not exceed the preset water level, taking the water level of the pressure container measured at the last moment as the water level of the pressure container.
In one embodiment, the input parameters further include the measured differential pressure equivalent, vapor density, and liquid water density at 100% full fill of the pressure vessel.
In one embodiment, the method further comprises: if the measured value of the narrow-range instrument is invalid and the measured value of the wide-range instrument meets the preset alarm condition, triggering an alarm signal; the preset alarm condition includes any one of that the measurement value of the wide-range meter does not exceed the measurement range of the narrow-range meter, the measurement value of the narrow-range meter exceeds the lower limit value of the measurement range, and the measurement value of the wide-range meter is invalid.
In a second aspect, a nuclear power plant pressure vessel water level monitoring apparatus, the apparatus comprising:
the judging module is used for judging whether the measured value of the narrow-range instrument is effective or not;
the effective operation module is used for determining the water level of the pressure container according to the input parameters if the measured value of the narrow-range instrument is effective; the input parameters are used for representing the attribute and state information of the pressure container;
and the invalid operation module is used for determining the water level of the pressure container according to the validity of the measurement value of the wide-range meter if the measurement value of the narrow-range meter is invalid.
In a third aspect, a computer device includes a memory and a processor, where the memory stores a computer program, and the processor implements the method for monitoring the water level of the pressure vessel in the nuclear power plant according to any one of the embodiments of the first aspect when executing the computer program.
In a fourth aspect, a computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the method for monitoring a water level in a pressure vessel of a nuclear power plant as described in any one of the embodiments of the first aspect.
According to the nuclear power station pressure vessel water level monitoring method and device, the computer equipment and the storage medium, different measuring methods are selected to be executed by judging whether the measured value of the narrow-range instrument is valid or not, namely the pressure vessel water level is determined according to the input parameters when the measured value of the narrow-range instrument is valid, and the pressure vessel water level is determined according to the validity of the measured value of the wide-range instrument when the measured value of the narrow-range instrument is invalid. In practical application, the effective signal of the measured value of the narrow-range instrument is more stable than the feedback signal of the main pump, and the wrong effective signal can not be output due to system tripping, power failure and the like, so that the scheme adopts the effectiveness of the measured value of the narrow-range instrument as the basis of the system output measured value, and compared with the traditional scheme of adopting the feedback signal of the main pump as the basis of the system output measured value, the pressure container water level measured by the pressure container monitoring method provided by the scheme is more accurate, and errors can not occur.
Drawings
FIG. 1 is a schematic diagram of an application system according to an embodiment;
FIG. 2 is a flow chart of a method for monitoring the water level in a pressure vessel of a nuclear power plant according to an embodiment;
FIG. 3 is a flow chart of one implementation of S102 in the embodiment of FIG. 2;
FIG. 4 is a flowchart of one implementation of S202 in the embodiment of FIG. 3;
FIG. 5 is a flowchart of one implementation of S302 in the embodiment of FIG. 4;
FIG. 6 is a flowchart of one implementation of S103 in the embodiment of FIG. 2;
FIG. 7 is a flowchart of one implementation of S502 in the embodiment of FIG. 6;
FIG. 8 is a flow chart of a method for monitoring the water level in a pressure vessel of a nuclear power plant according to an embodiment;
FIG. 9 is a schematic diagram of a pressure vessel differential pressure measurement device according to an exemplary embodiment;
FIG. 9A is a schematic diagram of a prior art differential pressure measurement device for a pressure vessel, according to an exemplary embodiment;
FIG. 10 is a schematic diagram of a pressure vessel water level measuring device according to an embodiment;
FIG. 10A is a schematic diagram of an exemplary embodiment of a prior art pressure vessel water level measuring device;
FIG. 11 is a schematic diagram of a nuclear power plant pressure vessel water level monitoring device according to an embodiment;
FIG. 12 is a schematic diagram of a nuclear power plant pressure vessel water level monitoring device provided in one embodiment;
FIG. 13 is a schematic diagram of a nuclear power plant pressure vessel water level monitoring device according to an embodiment;
FIG. 14 is a schematic diagram of a nuclear power plant pressure vessel water level monitoring device provided in one embodiment;
fig. 15 is a schematic internal structural diagram of a computer device according to an embodiment.
Detailed Description
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.
The method for monitoring the water level of the pressure vessel of the nuclear power station can be applied to a CCMS (nuclear power station controller system) shown in figure 1, wherein the CCMS comprises the following steps: the output end of the pressure container differential pressure measuring device is connected with the input end of the pressure container water level measuring device. The pressure vessel differential pressure measuring device may be, but is not limited to, various measuring devices, a personal computer, a notebook computer, a smart phone, a tablet computer, and the like, and the pressure vessel water level measuring device may be, but is not limited to, various measuring devices, a personal computer, a notebook computer, a smart phone, a tablet computer, and the like.
The following describes in detail the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems by embodiments and with reference to the drawings. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 2 is a flowchart of a nuclear power plant pressure vessel water level monitoring method according to an embodiment, which is executed by the pressure vessel water level measuring apparatus in fig. 1, and relates to a specific process in which the pressure vessel water level measuring apparatus measures the pressure vessel water level according to the validity of the measurement value of the narrow range meter. As shown in fig. 2, this includes:
s101, judging whether the measured value of the narrow-range meter is valid or not, if the measured value of the narrow-range meter is valid, executing step S102, and if the measured value of the narrow-range meter is invalid, executing step S103.
The present embodiment relates to the step of selecting to perform different measurement methods by judging the validity of the measurement value of the narrow range meter, which is an input signal parameter of the pressure vessel water level measuring apparatus, and which can be expressed by numerical values, for example, if the measurement value of the narrow range meter is valid, the validity of the measurement value of the narrow range meter is set to 1, and if the measurement value of the narrow range meter is invalid, the validity of the measurement value of the narrow range meter is set to 0. For convenience of later explanation of the working principle of the pressure container water level measuring device, the present application provides a representation method and contents of a plurality of input signal parameters of the pressure container water level measuring device, and output signal parameters of the pressure container water level measuring device, such as a plurality of input signal parameters of the pressure container water level measuring device listed in table 1, and a plurality of output signal parameters of the pressure container water level measuring device listed in table 2:
TABLE 1
TABLE 2
As described above, in conjunction with the contents of Table 1, the measured values of the narrow range meters can be expressed using Δ PNR, and the measured value validity of the narrow range meters can be expressed using A _ Δ P in Table 1NRDenotes that, in one application, if Δ PNREffective, then A _ DeltaP NR1, if Δ PNRInvalid, then A _ DeltaP NR0. Of course A. DELTA.PNROther numerical values, characters, letters, serial numbers and the like can also be selected to represent delta PNRThe effectiveness of this embodiment is not limited.
In practical application, when the pressure vessel water level measuring device needs to output the pressure vessel water level to a user, the pressure vessel water level measuring device may first obtain the validity of the measured value of the narrow-range meter, and then further determine whether the measured value of the narrow-range meter is valid according to the validity of the measured value of the narrow-range meter, if the measured value of the narrow-range meter is valid, execute the method for outputting the pressure vessel water level by the pressure vessel water level measuring device in a valid case, that is, step S102, and if the measured value of the narrow-range meter is invalid, execute the method for outputting the pressure vessel water level by the pressure vessel water level measuring device in an invalid case, that is, execute step S103. It should be noted that whether the measured value of the narrow-range meter is valid or not may be determined in advance by the pressure vessel water level measuring device according to the actual application condition of the system or the operating state of the narrow-range meter, and the implementation is not limited thereto.
S102, determining the water level of the pressure container according to the input parameters; the input variables are used to represent the properties and state information of the pressure vessel.
The input parameters are used for calculating the water level of the pressure container, and optionally, the input parameters may specifically include a pressure container measured differential pressure value, a pressure differential equivalent value when the pressure container is 100% full, steam density, liquid water density, and the like, which are used for representing the property and state information of the pressure container.
The embodiment relates to a method for outputting the water level of a pressure container by a pressure container water level measuring device under the condition that the measured value of a narrow-range meter is effective, which specifically comprises the following steps: and acquiring input parameters for calculating the water level of the pressure container, substituting the acquired input parameters into a preset calculation relational expression for calculating the water level of the pressure container, calculating to obtain the water level of the pressure container, and enabling the pressure container water level measuring device to output and display the value of the water level.
Optionally, the calculation relation of the water level of the pressure container may be represented by the following relation (1):
for the explanation of the parameters in the relation (1) in this embodiment, please refer to the signal parameters listed in table 1, and the description will not be repeated here.
And S103, determining the water level of the pressure container according to the effectiveness of the measurement value of the wide-range meter.
Wherein, the validity of the measured value of the wide-range meter is an input signal parameter of the pressure vessel water level measuring device, which can be represented by numerical values, for example, the validity of the measured value of the wide-range meter is set to 1 if the measured value of the wide-range meter is valid, and the validity of the measured value of the wide-range meter is set to 0 if the measured value of the wide-range meter is invalid.
The embodiment relates to a method for outputting the water level of a pressure container by a pressure container water level measuring device under the condition that the measured value of a narrow-range instrument is invalid, which specifically comprises the following steps: and obtaining the effectiveness of the measured value of the wide-range instrument, and judging whether the measured value of the wide-range instrument is effective or not to select and execute different measuring methods, so that the pressure container water level measuring device outputs the pressure container water level according to the corresponding measuring method.
In the above embodiment, different measurement methods are selected and executed by determining whether the measured value of the narrow-range meter is valid, that is, determining the water level of the pressure vessel according to the input parameter when the measured value of the narrow-range meter is valid, and determining the water level of the pressure vessel according to the validity of the measured value of the wide-range meter when the measured value of the narrow-range meter is invalid. In practical application, the effective signal of the measured value of the narrow-range instrument is more stable than the feedback signal of the main pump, and the wrong effective signal can not be output due to system tripping, power failure and the like, so that the scheme adopts the effectiveness of the measured value of the narrow-range instrument as the basis of the system output measured value, and compared with the traditional scheme of adopting the feedback signal of the main pump as the basis of the system output measured value, the pressure container water level measured by the pressure container monitoring method provided by the scheme is more accurate, and errors can not occur.
Fig. 3 is a flowchart of an implementation manner of S102 in the embodiment of fig. 2, and as shown in fig. 3, the step S102 "determining the pressure vessel water level according to the input parameter" includes:
s201, judging whether the input parameters are valid or not, if the input parameters are valid, executing the step S202, and if the input parameters are invalid, executing the step S203.
The present embodiment relates to the selection of steps for carrying out different measuring methods by determining the validity of an input variable. When the input parameters include a plurality of parameters as described in S102, it is necessary to satisfy that all the parameters included in the input parameters are valid when judging the validity of the input parameters, and that the input parameters are valid is indicated, and if any one of the parameters is invalid, the input parameters are invalid is indicated.
In practical applications, when the pressure vessel water level measuring device determines that the measured value of the narrow range meter is valid, it needs to further determine whether the input parameter is valid, so as to determine whether the input parameter is selected to calculate the water level of the pressure vessel, therefore, if the input parameter is valid, the method for outputting the pressure vessel water level by the pressure vessel water level measuring device under the condition that the input parameter is valid is executed, that is, step S202, and if the input parameter is invalid, the method for outputting the pressure vessel water level by the pressure vessel water level measuring device under the condition that the input parameter is invalid is executed, that is, step S203.
S202, acquiring the pressure vessel measurement pressure difference value in the input parameters, and determining the water level of the pressure vessel according to the pressure vessel measurement pressure difference value.
The embodiment relates to a method for outputting the water level of a pressure container by a pressure container water level measuring device under the condition that the measured value of a narrow-range instrument is effective and the input parameter is effective, which specifically comprises the following steps: specifically, the pressure vessel water level measuring device may obtain the pressure vessel measured differential pressure value by using the pressure vessel differential pressure measuring device in fig. 1, and then substitute the pressure vessel measured differential pressure value and other input parameters into a preset calculation formula for calculating the pressure vessel water level to calculate the pressure vessel water level, and enable the pressure vessel water level measuring device to output and display the value of the water level.
And S203, taking the water level of the pressure container measured at the last moment as the water level of the pressure container.
The embodiment relates to a method for outputting the water level of a pressure container by a pressure container water level measuring device under the condition that the measured value of a narrow-range instrument is valid and the input parameter is invalid, wherein under the application condition, the operation of 0 or 1 main pump is explained, the input parameter can be inaccurate, and if the water level of the pressure container obtained by calculation by using the input parameter is also inaccurate, therefore, at the moment, the pressure container water level measuring device can directly output and display the water level of the pressure container obtained by measurement at the last moment as the water level of the pressure container so as to avoid introducing wrong calculation to cause wrong measurement.
Fig. 4 is a flowchart of an implementation manner of S202 in the embodiment of fig. 3, an execution subject of the embodiment is the pressure vessel differential pressure measurement apparatus in fig. 1, and the embodiment relates to a specific process in which the pressure vessel differential pressure measurement apparatus calculates a measured pressure difference value of a pressure vessel according to an input parameter, as shown in fig. 4, the above-mentioned S202 "obtaining the measured pressure difference value of the pressure vessel in the input parameter" includes:
s301, acquiring a differential pressure correction value, a reference differential pressure value and a loop relative pressure of the narrow-range instrument.
The differential pressure correction value, the reference differential pressure value and the primary circuit relative pressure of the narrow-range instrument in the embodiment can be predefined by the pressure vessel differential pressure measuring device according to the actual application requirement, so that the differential pressure correction value, the reference differential pressure value and the primary circuit relative pressure can be used for calculating the differential pressure measurement value of the pressure vessel.
And S302, obtaining a pressure vessel measurement differential pressure value according to the differential pressure correction value of the narrow-range instrument, the reference differential pressure value and the loop relative pressure.
The embodiment relates to a process for calculating a pressure difference value measured by a pressure vessel differential pressure measuring device, which specifically comprises the following steps: when the pressure container differential pressure measuring device obtains the differential pressure correction value, the reference differential pressure value and the loop relative pressure of the narrow-range instrument, the parameters can be substituted into a preset calculation relational expression for calculating the pressure container measured differential pressure value, the pressure container measured differential pressure value is obtained through calculation, the pressure container differential pressure measuring device outputs the pressure container measured differential pressure value to the pressure container water level measuring device, and the pressure container water level measuring device can obtain the pressure container water level according to the obtained pressure container measured differential pressure value.
Optionally, the calculation relation of the measured differential pressure value of the pressure vessel may be represented by the following relation (2):
ΔPVSL＝ΔPM-NR+αN×(PRCP-CE)-ΔPREF-(ECO+αEC×PRCP) (2)；
wherein, Δ PVSLRepresenting a measured differential pressure value of the pressure vessel; delta PM-NRThe differential pressure correction value of the narrow-range instrument is represented; pRCPIndicating a circuit relative pressure; delta PREFRepresents a reference differential pressure value; alpha is alphaNCorrection coefficients of the narrow range sensor; cEA correction factor representing a calibrated pressure sensor; eCOAn initial value representing a calculation factor for calculating a correction value for a measured differential pressure of the pressure vessel; alpha is alphaECA correction factor representing the relative pressure of the circuit.
Fig. 5 is a flowchart of an implementation manner of S302 in the embodiment of fig. 4, where the embodiment relates to a specific process of calculating a measured differential pressure value of a pressure vessel by a differential pressure measurement device of the pressure vessel, and as shown in fig. 5, the above S302 "obtaining the measured differential pressure value of the pressure vessel according to the differential pressure correction value of the narrow range meter, the reference differential pressure value, and the relative pressure of the primary circuit" includes:
s401, determining a correction value of the measured differential pressure value of the pressure container according to the differential pressure correction value of the narrow-range instrument and the relative pressure of a primary circuit.
The present embodiment relates to a method for calculating a first parameter (a correction value of a measured differential pressure value of a pressure vessel) to be used when a differential pressure measuring apparatus of a pressure vessel calculates the measured differential pressure value of the pressure vessel, and the method can be implemented by using the following relation (3):
ΔPM＝ΔPM-NR+αN×(PRCP-CE) (3)；
wherein, Δ PMA correction value indicative of a measured differential pressure value of the pressure vessel; the other parameters in the relation (3) have the same physical meanings as those of the parameters in the relation (2), and for the specific explanation, reference is made to the foregoing description, and no repeated explanation is made here.
When the pressure vessel differential pressure measuring device needs to calculate the correction value of the pressure vessel measured differential pressure value, the parameters can be substituted into the relational expression (3) to calculate the correction value of the pressure vessel measured differential pressure value, so that the pressure vessel differential pressure measuring device can calculate the pressure vessel measured differential pressure value according to the correction value of the pressure vessel measured differential pressure value.
And S402, determining a correction factor according to the relative pressure of a primary circuit.
The present embodiment relates to a method for calculating a second parameter (correction factor) to be used when calculating a measured differential pressure value of a pressure vessel by using a differential pressure measuring device of the pressure vessel, and the method can be implemented by using the following relation (4):
EC＝ECO+αEC×PRCP (4)；
wherein E isCRepresents a correction factor; the other parameters in the relation (4) have the same physical meanings as those of the parameters in the relation (2), and for the specific explanation, reference is made to the foregoing description, and no repeated explanation is made here.
When the pressure vessel differential pressure measuring device needs to calculate the correction factor, the parameters can be substituted into the relation (4) to calculate the correction factor, so that the pressure vessel differential pressure measuring device can calculate the pressure vessel measured differential pressure value according to the correction factor.
And S403, determining the pressure vessel measured pressure difference value according to the corrected pressure vessel measured pressure difference value, the correction factor and the reference pressure difference value.
When the pressure vessel differential pressure measurement device obtains the correction value and the correction factor of the pressure vessel measured differential pressure value according to S401 and S402, the corrected pressure vessel measured differential pressure value, the correction factor and the reference differential pressure value may be further substituted into the following relational expression (5) to be calculated, so as to obtain the pressure vessel measured differential pressure value:
ΔPVSL＝ΔPM-ΔPREF-EC (5)；
the parameters in the above relational expressions have the same physical meanings as those of the parameters in the above relational expressions (2) to (4), and for the specific explanation, reference is made to the above description, and no repeated explanation is made here.
While the above-described embodiments of fig. 3-5 illustrate the method of the pressure vessel water level measuring apparatus measuring the water level of the pressure vessel in the case where the measurement value of the narrow range meter is valid, the following embodiments of fig. 6-illustrate the method of the pressure vessel water level measuring apparatus measuring the water level of the pressure vessel in the case where the measurement value of the narrow range meter is invalid.
Fig. 6 is a flowchart of an implementation manner of S103 in the embodiment of fig. 2, and as shown in fig. 6, the S103 "determining the pressure vessel water level according to the validity of the measurement value of the wide range meter" includes:
and S501, judging whether the measurement value of the wide-range meter is valid or not, if so, executing the step S502, and if not, executing the step S503.
The present embodiment relates to the step of selecting to perform a different measurement method by judging the validity of the measurement value of the wide range meter in the case where the measurement value of the narrow range meter is invalid, wherein the validity of the measurement value of the wide range meter is one input signal parameter of the pressure vessel water level measuring apparatus, which may be expressed by numerical values, for example, the validity of the measurement value of the wide range meter is set to 1 if the measurement value of the wide range meter is valid, and the validity of the measurement value of the wide range meter is set to 0 if the measurement value of the wide range meter is invalid.
In practical applications, when the pressure vessel water level measuring device determines that the measured value of the narrow-range meter is invalid, it needs to further determine whether the measured value of the wide-range meter is valid, so as to output different pressure vessel water levels according to the validity of the measured value of the wide-range meter, therefore, when the measured value of the wide-range meter is valid, the method of outputting the pressure vessel water level by the pressure vessel water level measuring device in the case that the measured value of the wide-range meter is valid is performed, i.e., step S502, and when the measured value of the wide-range meter is invalid, the method of outputting the pressure vessel water level by the pressure vessel water level measuring device in the case that the measured value of the wide-range meter is invalid is performed, i.e., step S503.
And S502, determining the water level of the pressure container according to the measurement value of the wide-range meter and the measurement range of the narrow-range meter.
The embodiment relates to a method for outputting the water level of a pressure container by a pressure container water level measuring device under the condition that the measured value of a wide-range instrument is effective, which specifically comprises the following steps: and obtaining the measurement value of the wide-range instrument and the measurement range of the narrow-range instrument, further comparing the measurement value of the wide-range instrument with the measurement range of the narrow-range instrument to obtain a comparison result, and enabling the pressure container water level measuring device to select different measurement methods to be executed according to the comparison result to output the corresponding pressure container water level.
And S503, taking the water level of the pressure container measured at the last moment as the water level of the pressure container.
The embodiment relates to a method for outputting the water level of the pressure container by the pressure container water level measuring device under the condition that the measured value of the wide-range instrument is invalid, namely, the pressure container water level measuring device directly takes the water level of the pressure container measured at the last moment as the finally output and displayed water level of the pressure container.
Fig. 7 is a flowchart of an implementation manner of S502 in the embodiment of fig. 6, and as shown in fig. 7, S502 "determining the pressure container water level according to the measurement value of the wide-range meter and the measurement range of the narrow-range meter" includes:
s601, judging whether the measurement value of the wide-range meter exceeds the measurement range of the narrow-range meter, if so, executing the step S602, and if not, executing the step S603.
The embodiment relates to a step of executing different measuring methods by judging whether the measured value of the wide-range meter exceeds the measuring range of the narrow-range meter or not under the condition that the measured value of the narrow-range meter is invalid and the measured value of the wide-range meter is valid. In practical applications, when the pressure vessel water level measuring device determines that the measured value of the narrow-range meter is invalid and the measured value of the wide-range meter is valid, it needs to further determine whether the measured value of the wide-range meter exceeds the measuring range of the narrow-range meter in order to select different pressure vessel water levels to be output, so that when the measured value of the wide-range meter exceeds the measuring range of the narrow-range meter, the method for outputting the pressure vessel water level by the pressure vessel water level measuring device under an out-of-range condition, that is, step S602, is performed, and when the measured value of the wide-range meter does not exceed the measuring range of the narrow-range meter, the method for outputting the pressure vessel water level by the pressure vessel water level measuring device under an out-of-range condition, that is, step S603, is performed.
And S602, determining the preset water level mandatory value as the water level of the pressure container.
The embodiment relates to a method for outputting the water level of a pressure container by a pressure container water level measuring device under the conditions that the measured value of a narrow-range instrument is invalid, the measured value of a wide-range instrument is valid, and the measured value of the wide-range instrument exceeds the measuring range of the narrow-range instrument.
And S603, taking the water level of the pressure container measured at the last moment as the water level of the pressure container.
The embodiment relates to a method for outputting the water level of a pressure container by a pressure container water level measuring device under the conditions that the measured value of a narrow-range instrument is invalid, the measured value of a wide-range instrument is valid, and the measured value of the wide-range instrument does not exceed the measuring range of the narrow-range instrument.
It should be noted that, when the pressure container water level measuring device calculates the pressure container water level according to any of the above embodiments, the effective value of the pressure container water level may be further set, specifically, may be set to 0 or 1, and the effective value is output and displayed. When the effective value of the pressure container water level is set to 0, the pressure container water level measuring device is used for indicating that the pressure container water level output by the pressure container water level measuring device is an invalid pressure container water level to a user; and when the effective value of the pressure container water level is set to 1, the effective pressure container water level is used for indicating the pressure container water level output by the pressure container water level measuring device to the user.
Optionally, when the pressure container water level measuring device obtains the calculated pressure container water level, the binary state information of the pressure container water level may be further set, and the binary state information is output and displayed. When the binary state information is set to be 0, the binary state information is used for indicating the water level of the pressure container output by the pressure container water level measuring device to a user as the calculated water level of the pressure container or the water level of the pressure container obtained by the corresponding water level of the pressure container at the last moment; when the binary state information is set to be 1, the binary state information is used for indicating the water level of the pressure container output by the pressure container water level measuring device to be a preset mandatory value to a user, and the setting of the binary state information of the water level of the pressure container is used for facilitating the user to distinguish the source of the water level of the pressure container.
Based on all the embodiments, an application scenario also exists, that is, when the method of any one of the embodiments is executed, if the measurement value of the narrow-range meter is invalid and the measurement value of the wide-range meter meets a preset alarm condition, an alarm signal is triggered; the preset alarm condition includes any one of that the measurement value of the wide-range meter does not exceed the measurement range of the narrow-range meter, the measurement value of the narrow-range meter exceeds the lower limit value of the measurement range, and the measurement value of the wide-range meter is invalid.
The embodiment relates to several application scenarios of triggering an alarm signal by a pressure container water level measuring device, namely the first scenario is as follows: when the measured value of the narrow-range instrument is invalid and the measured value of the wide-range instrument does not exceed the measuring range of the narrow-range instrument; the second method is as follows: when the measured value of the narrow-range instrument is invalid and the measured value of the wide-range instrument is invalid; the third is: when the measurement value of the narrow-range meter is invalid and the measurement value of the narrow-range meter exceeds the lower limit value of the measurement range. In either case, the pressure vessel water level measurement device will trigger an alarm signal.
In summary, the present application also provides a method for monitoring a water level of a pressure vessel of a nuclear power plant, as shown in fig. 8, the method includes:
and S701, judging whether the measurement value of the narrow-range meter is valid or not, if so, executing the step S702, and if not, executing the step S709.
S702, judging whether the input parameters are valid or not, if the input parameters are valid, executing the steps S703-S707, and if the input parameters are invalid, executing the step S708.
And S703, acquiring a differential pressure correction value, a reference differential pressure value and a loop relative pressure of the narrow-range instrument.
And S704, determining the corrected measured pressure difference value of the pressure container according to the pressure difference correction value of the narrow-range instrument and the relative pressure of the primary circuit.
And S705, determining a correction factor according to the relative pressure of the primary circuit.
And S706, determining the pressure vessel measured pressure difference value according to the corrected pressure vessel measured pressure difference value, the correction factor and the reference pressure difference value.
And S707, determining the water level of the pressure container according to the pressure difference value measured by the pressure container, setting the effective value of the water level of the pressure container to be 1, setting the binary state information of the water level of the pressure container to be 0, and outputting and displaying the water level of the pressure container, the effective value of the water level of the pressure container and the binary state information of the water level of the pressure container.
And S708, taking the water level of the pressure container measured at the last moment as the water level of the pressure container, setting the effective value of the water level of the pressure container to be 0, setting the binary state information of the water level of the pressure container to be 0, and outputting and displaying the water level of the pressure container, the effective value of the water level of the pressure container and the binary state information of the water level of the pressure container.
S709, it is determined whether the measurement value of the wide-range meter is valid, and if the measurement value of the wide-range meter is valid, the step S710 is executed, and if the measurement value of the wide-range meter is invalid, the step S712 is executed.
And S710, judging whether the measurement value of the wide-range meter exceeds the measurement range of the narrow-range meter, if so, executing the step S711, and if not, executing the step S712.
And S711, determining the preset water level mandatory value as the water level of the pressure container, setting the effective value of the water level of the pressure container to be 1, setting the binary state information of the water level of the pressure container to be 1, and outputting and displaying the water level of the pressure container, the effective value of the water level of the pressure container and the binary state information of the water level of the pressure container.
And S712, taking the water level of the pressure container measured at the last moment as the water level of the pressure container, setting the effective value of the water level of the pressure container to be 0, setting the binary state information of the water level of the pressure container to be 0, and outputting and displaying the water level of the pressure container, the effective value of the water level of the pressure container and the binary state information of the water level of the pressure container.
Based on the method for calculating the measured differential pressure value of the pressure vessel by using the differential pressure measuring device of the pressure vessel described in the embodiments of fig. 4-5 and 8, the present application also provides a corresponding differential pressure measuring device of the pressure vessel, as shown in fig. 9, which is used for calculating the measured differential pressure value of the pressure vessel according to the input parameter (Δ P)M-NR、ΔPREF、PRCP) And measuring and calculating the measured differential pressure value of the pressure container, and outputting the measured differential pressure value of the pressure container and the effective value of the measured differential pressure value of the pressure container to a pressure container water level measuring device connected with the pressure container, so that the pressure container water level measuring module can normally output the pressure container water level to be measured.
Comparing the pressure vessel differential pressure measuring device with the existing pressure vessel differential pressure measuring device, as shown in the schematic diagram of the existing pressure vessel differential pressure measuring device shown in fig. 9A, it can be seen that the pressure vessel differential pressure measuring device does not consider the operating state of the main pump (N _ RCP in fig. 9A identifies the number of the main pumps, i.e. reflects the operating state of the main pump), so that when the pressure vessel water level measuring device of the present solution measures the pressure vessel water level, the pressure vessel water level measured by the narrow-range meter or the pressure vessel water level measured by the wide-range meter is not selected to be switched and output according to the feedback signal of the main pump. The method avoids the inaccuracy of the water level measurement of the pressure container caused by the inaccuracy of the feedback signal of the main pump.
Based on the method for calculating the water level of the pressure vessel by using the water level measuring device of the pressure vessel described in the embodiments of fig. 2, 6-8, the present application also provides a corresponding water level measuring device of the pressure vessel, as shown in fig. 10, which is used for calculating the water level of the pressure vessel according to the input parameter (Δ P)VSL、A_ΔPVSL、ΔPVSL 100、A_ΔPVSL 100、ρv、A_ρv、ρL、A_ρL、A_ΔPNR、ΔPWR、A_ΔPWR) And measuring and calculating the water level of the pressure container, and outputting the water level of the pressure container and the effective value of the water level of the pressure container.
Comparing the pressure vessel water level measuring device with the existing pressure vessel water level measuring device, as shown in the schematic diagram of the existing pressure vessel water level measuring device shown in fig. 10A, it can be seen that the input parameters of the pressure vessel water level measuring device have an effective value signal of the measured value of the narrow-range meter, and different pressure vessel water levels are selectively output by using the signal as a judgment basis, while the existing pressure vessel water level measuring device does not have an effective value signal of the measured value of the narrow-range meter, which indicates that the effective value signal is not judged according to the measured value of the narrow-range meter.
It should be understood that although the various steps in the flow charts of fig. 2-8 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-8 may include multiple sub-steps or phases that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or phases is not necessarily sequential.
In one embodiment, as shown in fig. 11, there is provided a nuclear power plant pressure vessel water level monitoring apparatus including: a judging module 11, an effective operation module 12 and an ineffective operation module 13, wherein:
the judging module 11 is used for judging whether the measured value of the narrow-range instrument is valid;
the effective operation module 12 is used for determining the water level of the pressure container according to the input parameters when the measured value of the narrow-range instrument is effective; the input parameters are used for representing the attribute and state information of the pressure container;
and the invalid operation module 13 is used for determining the water level of the pressure container according to the validity of the measurement value of the wide-range meter when the measurement value of the narrow-range meter is invalid.
In one embodiment, as shown in fig. 12, the effective operation module 12 includes: a first judgment unit 121, a first determination unit 122, and a second determination unit 123, wherein:
a first judging unit 121, configured to judge whether the input parameter is valid;
the first determining unit 122 is configured to, when the input parameter is valid, obtain a pressure vessel measured pressure difference value in the input parameter, and determine a pressure vessel water level according to the pressure vessel measured pressure difference value;
and a second determination unit 123, configured to determine, when the input parameter is invalid, the pressure vessel water level measured at the previous time as the pressure vessel water level.
In one embodiment, the first determining unit 122 is specifically configured to obtain a differential pressure correction value, a reference differential pressure value, and a loop relative pressure of the narrow range meter; and obtaining a pressure vessel measurement differential pressure value according to the differential pressure correction value of the narrow-range instrument, the reference differential pressure value and the loop relative pressure.
In one embodiment, the first determining unit 122 is further specifically configured to determine a corrected measured differential pressure value of the pressure vessel according to the differential pressure correction value of the narrow-range meter and the relative pressure of the primary circuit; determining a correction factor according to the relative pressure of a loop; and determining the pressure vessel measured pressure difference value according to the corrected pressure vessel measured pressure difference value, the correction factor and the reference pressure difference value.
In one embodiment, as shown in fig. 13, the invalidation operation module 13 includes: a second determination unit 131, a third determination unit 132, and a fourth determination unit 133, wherein:
the second judging unit 131 is configured to judge whether the measurement value of the wide-range meter is valid;
a third determining unit 132 for determining the pressure vessel water level according to the measurement value of the wide range meter and the measurement range of the narrow range meter when the measurement value of the wide range meter is valid;
and a fourth determination unit 133 for determining the pressure vessel water level measured at the previous time as the pressure vessel water level when the measurement value of the wide range meter is invalid.
In one embodiment, the third determining unit 132 is specifically configured to determine whether the measurement value of the wide-range meter exceeds the measurement range of the narrow-range meter; if the water level exceeds the preset water level, determining a preset water level mandatory value as the water level of the pressure container; and if the water level does not exceed the preset water level, taking the water level of the pressure container measured at the last moment as the water level of the pressure container.
In one embodiment, as shown in fig. 14, the above apparatus further comprises:
the alarm module 14 is used for triggering an alarm signal when the measured value of the narrow-range instrument is invalid and the measured value of the wide-range instrument meets a preset alarm condition; the preset alarm condition includes any one of that the measurement value of the wide-range meter does not exceed the measurement range of the narrow-range meter, the measurement value of the narrow-range meter exceeds the lower limit value of the measurement range, and the measurement value of the wide-range meter is invalid.
For specific definition of the nuclear power plant pressure vessel water level monitoring device, reference may be made to the above definition of a nuclear power plant pressure vessel water level monitoring method, and details are not repeated here. All or part of the modules in the nuclear power plant pressure vessel water level monitoring device can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 15. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a nuclear power plant pressure vessel water level monitoring method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 15 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
judging whether the measured value of the narrow-range instrument is effective or not;
if the measured value of the narrow-range instrument is valid, determining the water level of the pressure container according to the input parameters; the input parameters are used for representing the attribute and state information of the pressure container;
and if the measured value of the narrow-range meter is invalid, determining the water level of the pressure container according to the validity of the measured value of the wide-range meter.
The implementation principle and technical effect of the computer device provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, the computer program, when executed by a processor, further implementing the steps of:
judging whether the measured value of the narrow-range instrument is effective or not;
if the measured value of the narrow-range instrument is valid, determining the water level of the pressure container according to the input parameters; the input parameters are used for representing the attribute and state information of the pressure container;
and if the measured value of the narrow-range meter is invalid, determining the water level of the pressure container according to the validity of the measured value of the wide-range meter.
The implementation principle and technical effect of the computer-readable storage medium provided by the above embodiments are similar to those of the above method embodiments, and are not described herein again.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), synchronous Link (Synchlink) DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for monitoring the water level of a pressure vessel of a nuclear power plant is characterized by comprising the following steps:
judging whether the measured value of the narrow-range instrument is effective or not;
if the measured value of the narrow-range instrument is valid, judging whether the input parameter is valid; if the input parameters are valid, acquiring a pressure vessel measurement pressure difference value in the input parameters, and determining the water level of the pressure vessel according to the pressure vessel measurement pressure difference value; if the input parameter is invalid, taking the water level of the pressure container measured at the last moment as the water level of the pressure container; the input parameters are used for representing the attribute and state information of the pressure container;
and if the measured value of the narrow-range meter is invalid, determining the water level of the pressure container according to the validity of the measured value of the wide-range meter.
2. The method of claim 1, wherein said obtaining the pressure vessel measured differential pressure value comprises:
acquiring a differential pressure correction value, a reference differential pressure value, a primary circuit relative pressure, a correction factor for calibrating a pressure sensor, an initial value of a calculation factor for calculating the differential pressure correction value, a correction factor for the primary circuit relative pressure and a correction factor for the narrow-range instrument of the narrow-range instrument;
determining a correction value of the pressure difference value measured by the pressure container according to the differential pressure correction value of the narrow-range instrument, the relative pressure of the primary circuit and a correction factor of the calibration pressure sensor;
determining a correction factor according to the relative pressure of the primary circuit, the initial value of the calculation factor for calculating the differential pressure correction value, the correction coefficient of the relative pressure of the primary circuit and the correction coefficient of the narrow-range instrument;
and determining the measured differential pressure value of the pressure vessel according to the corrected value of the measured differential pressure value of the pressure vessel, the correction factor and the reference differential pressure value.
3. The method of claim 1 or 2, wherein said determining the pressure vessel water level based on the validity of the wide range meter measurements comprises:
judging whether the measurement value of the wide-range meter is valid;
if the measured value of the wide-range meter is valid, determining the water level of the pressure container according to the measured value of the wide-range meter and the measured range of the narrow-range meter;
and if the measured value of the wide-range meter is invalid, taking the water level of the pressure container measured at the last moment as the water level of the pressure container.
4. The method of claim 3, wherein said determining the pressure vessel water level from the wide range meter measurement and the narrow range meter measurement comprises:
judging whether the measurement value of the wide-range meter exceeds the measurement range of the narrow-range meter;
if the water level exceeds the preset water level, determining a preset water level mandatory value as the water level of the pressure container;
and if the water level does not exceed the preset value, taking the water level of the pressure container measured at the previous moment as the water level of the pressure container.
5. The method of claim 4, wherein the input parameters further include a measured differential pressure equivalent, a vapor density, and a liquid water density at 100% full fill of the pressure vessel.
6. The method according to claim 4 or 5, characterized in that the method further comprises:
if the measured value of the narrow-range instrument is invalid and the measured value of the wide-range instrument meets a preset alarm condition, triggering an alarm signal; the preset alarm condition comprises any one of that the measurement value of the wide-range meter does not exceed the measurement range of the narrow-range meter, the measurement value of the narrow-range meter exceeds the lower limit value of the measurement range, and the measurement value of the wide-range meter is invalid.
7. The method of claim 1, wherein the validity of the measurement value of the narrow range meter is expressed using a switching value.
8. A nuclear power plant pressure vessel water level monitoring device, the device characterized in that:
the judging module is used for judging whether the measured value of the narrow-range instrument is effective or not;
the effective operation module is used for judging whether the input parameters are effective or not if the measured value of the narrow-range instrument is effective; if the input parameters are valid, acquiring a pressure vessel measurement pressure difference value in the input parameters, and determining the water level of the pressure vessel according to the pressure vessel measurement pressure difference value; if the input parameter is invalid, taking the water level of the pressure container measured at the last moment as the water level of the pressure container; the input parameters are used for representing the attribute and state information of the pressure container;
and the invalid operation module is used for determining the water level of the pressure container according to the validity of the measurement value of the wide-range meter if the measurement value of the narrow-range meter is invalid.
9. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7.
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