Method and device for calculating operation mode of nuclear power unit

Abstract

The invention discloses a nuclear power unit operation mode calculation method and device, and the method comprises the following steps: S1, selecting a corresponding measurement point for each operation mode of a nuclear power unit, and configuring a logic judgment formula corresponding to each operation model based on the measurement points; s2, acquiring real-time values of all the measuring points of the nuclear power unit, and calculating a logic calculation value of the logic judgment formula based on the real-time values; s3, obtaining an operation state calculation result of the nuclear power unit according to the logic calculation value of the logic judgment formula; and S4, acquiring a real operation state of the nuclear power unit, comparing the real operation state with the operation state calculation result, and modifying the logic judgment formula based on a comparison result. According to the invention, the whole operation process of the nuclear power unit can be accurately monitored in real time.

Description

Technical Field

[0001] The present invention relates to the field of nuclear power operation safety technology, and in particular to a method and device for calculating an operation mode of a nuclear power unit. Background Art

[0002] A nuclear power unit is a basic power generation unit consisting of a reactor and its supporting steam turbine generator unit, as well as the systems and facilities required to maintain their normal operation and ensure safety. There are various operating modes for nuclear power units, and the measurement points that need to be monitored in different operating modes are different. Therefore, it is necessary to carry out corresponding monitoring for different operating modes of nuclear power units, timely detect abnormal conditions of nuclear power units and issue alarms to ensure the safety of nuclear power unit operation and the safety of staff. At present, the monitoring of the operating status of nuclear power units is mainly completed by the DCS system. The monitoring and alarm of the DCS system is only for monitoring during the grid-connected power generation operation, and it is impossible to complete effective monitoring in different operating modes during the entire operation process. Especially when the nuclear power unit is shut down, the alarm signal of the DCS system is usually shielded, resulting in the inability of personnel outside the nuclear power plant to timely know the real-time situation of the nuclear power unit, causing inconvenience and hidden dangers to the operation and maintenance of the nuclear power unit. Summary of the invention

[0003] In view of this, it is necessary to provide a method and device for calculating the operating mode of a nuclear power unit, so as to effectively solve the problem of incomplete and untimely monitoring of the operating status of the nuclear power unit.

[0004] The present invention provides a method for calculating an operating mode of a nuclear power unit, comprising the following steps: Step S1, selecting a corresponding measuring point for each operating mode of the nuclear power unit, and configuring a corresponding logical judgment formula for each operating model based on the measuring point; Step S2, obtaining the real-time value of each measuring point of the nuclear power unit, and calculating the logical calculation value of the logical judgment formula based on the real-time value; Step S3, obtaining a calculation result of the operating state of the nuclear power unit according to the logical calculation value of the logical judgment formula; Step S4, obtaining the actual operating status of the nuclear power unit, comparing the actual operating status with the operating status calculation result, and modifying the logical judgment formula based on the comparison result.

[0005] Preferably, the step S1 specifically comprises: A plurality of judgment conditions are set in each operation mode of the nuclear power unit, each judgment condition includes a comparison value of a measuring point and a judgment condition, and a logical operation is performed based on the plurality of judgment conditions to obtain a logical judgment formula of a corresponding operation model.

[0006] Preferably, the step S2 is specifically: The real-time value of each measuring point of the nuclear power unit is obtained from the DCS system, and the real-time value is substituted into the logic judgment formula to obtain the logic calculation value of the logic judgment formula.

[0007] Preferably, the step S3 is specifically: There is only one logical calculation value of the logical judgment formula in each operation mode that is equal to "yes", and the operation state calculation result of the nuclear power unit is the operation model corresponding to the logical judgment formula whose logical calculation value is equal to "yes".

[0008] Preferably, the step S3 further comprises: If the number of logical calculation values ​​of the logical judgment formula in each operating mode that is equal to "yes" is not the same, the logical judgment formula configuration is incorrect and the logical judgment formula should be modified.

[0009] Preferably, the step S4 is specifically: The actual operating status of the nuclear power unit is obtained based on the daily unit inspection report. If the calculated operating status is different from the actual operating status, a configuration error alarm is issued, and the threshold and conditions of the logical judgment formula are modified. The operating status of the nuclear power unit is continued to be calculated based on the modified logical judgment formula.

[0010] Preferably, it also includes: After a nuclear power unit is overhauled, the logical judgment formulas under each operating mode are optimized based on the operating status of the daily report of the overhaul.

[0011] Preferably, it also includes: The operation status calculation result is shared with the staff related to the nuclear power unit, and before performing nuclear power operations, the safety status of the current operation is judged based on the operation status calculation result.

[0012] The present invention also provides a nuclear power unit operation mode calculation device, comprising a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the nuclear power unit operation mode calculation method is implemented.

[0013] Compared with the prior art, the present invention has the following beneficial effects: the present invention configures a corresponding logic judgment formula for each operation mode of a nuclear power unit, judges the real-time operation status of the nuclear power unit based on the real-time value of the measuring point, realizes the real-time monitoring of the whole process of the nuclear power unit, and ensures the safety of the whole process of operation of the nuclear power unit. At the same time, the operation status calculation result based on the logic judgment formula is compared with the actual operation status, and the logic judgment formula is modified based on the comparison result, so as to continuously optimize the logic judgment formula and improve its calculation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: FIG1 is a flow chart of an embodiment of a method for calculating an operating mode of a nuclear power unit provided by the present invention; Figure 2 yes Figure 1 The configuration diagram of an embodiment of a configuration logic judgment formula for different operation modes of the No. 1 nuclear power unit in the embodiment shown; Figure 3a yes Figure 1 The configuration diagram of an embodiment of a logical judgment formula for configuring different operation modes of the No. 5 nuclear power unit in the embodiment shown; Figure 3b yes Figure 1 The illustrated embodiment is a configuration diagram of an embodiment of a configuration logic judgment formula for the No. 1 nuclear power unit in the reactor power operation mode. DETAILED DESCRIPTION

[0015] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0016] For example, see Figure 1 In this embodiment, a method for calculating the operation mode of a nuclear power unit comprises the following steps: Step S1, selecting a corresponding measuring point for each operating mode of the nuclear power unit, and configuring a corresponding logical judgment formula for each operating model based on the measuring point; Step S2, obtaining the real-time value of each measuring point of the nuclear power unit, and calculating the logical calculation value of the logical judgment formula based on the real-time value; Step S3, obtaining a calculation result of the operating state of the nuclear power unit according to the logical calculation value of the logical judgment formula; Step S4, obtaining the actual operating status of the nuclear power unit, comparing the actual operating status with the operating status calculation result, and modifying the logical judgment formula based on the comparison result.

[0017] This embodiment proposes a method for visually configuring the calculation logic for the calculation of the real-time operation mode of the nuclear power unit, and uses the experience of nuclear power operators to continuously optimize the model and improve the accuracy of the model. Specifically, the power plant measurement point is selected for the judgment logic of different operation modes, and then the judgment conditions and comparison thresholds are selected to generate a logical judgment formula. Then the real-time value can be used to calculate whether the current judgment condition result is "yes" or "no". The calculation logic of each state is combined and judged by multiple judgment conditions. The conditions can be combined with "and", "or" and brackets. The logical calculation value of the logical judgment formula is obtained after the judgment of each judgment condition of each operation mode. The operation mode with a logical calculation value of "yes" is the operation state calculation result. Finally, the staff regularly checks the operation state calculation result. If it does not match the actual operation state, the logical judgment formula is modified, and the experience of nuclear power operation staff is used to continuously optimize the model and improve the accuracy of the model.

[0018] This embodiment configures a corresponding logical judgment formula for each operation mode of the nuclear power unit, judges the real-time operation status of the nuclear power unit based on the real-time value of the measuring point, realizes the real-time monitoring of the whole process of the nuclear power unit, and ensures the safety of the whole process of the nuclear power unit. At the same time, the operation status calculation result based on the logical judgment formula is compared with the actual operation status, and the logical judgment formula is modified based on the comparison result, so as to continuously optimize the logical judgment formula and improve its prediction accuracy.

[0019] Furthermore, the step S1 is specifically as follows: A plurality of judgment conditions are set in each operation mode of the nuclear power unit, each judgment condition includes a comparison value of a measuring point and a judgment condition, and a logical operation is performed based on the plurality of judgment conditions to obtain a logical judgment formula of a corresponding operation model.

[0020] Specifically, this embodiment includes a total of 8 nuclear power units, and the No. 1 nuclear power unit and the No. 5 nuclear power unit are used as examples for description. Figure 2 As shown in the figure, the No. 1 nuclear power unit includes eight operating modes: power operation, minimum monitorable power, hot state, normal cold shutdown, maintenance cold shutdown, refueling cold shutdown, heating, and cooling. Figure 3a As shown, the No. 5 nuclear power unit includes six operation modes, namely, reactor power operation mode, SG cooling shutdown condition, RRA cooling shutdown mode, maintenance shutdown mode, refueling cold shutdown mode, and complete refueling cold shutdown mode.

[0021] In this embodiment, there are 6 units in total, and the measuring points of each unit are different but within a range. The measuring point range of unit 1 is shown in the following table.

[0022] Table 1 Measuring point Measuring point code Primary circuit temperature JEC00FT601XP04 Primary circuit pressure JAA10CP911XQ01 Condenser vacuum MAG10CP001XQ01 Secondary circuit pressure LBA00CP911XQ01 Electric power MKA10CE911XQ01 Nuclear Power JKT00FJ901UXQ01 Primary circuit level JEF10CL911XQ01 Total steam generator feed water flow LAB00FF902XQ01 Turbine speed MAX51CS901XQ01 Total condensate flow LCA20CF901XQ01 Neutron power JKT00FX801XXQ02 Steam generator level JEA10CL913XQ01 Primary circuit level JEF10CL913XQ01 Deaerator Liquid Level LAA10CL901XQ01 JNB Level JNB10CL003XQ01 Boron concentration derived from two-channel waste heat JMN20CQ001XQ01 One channel waste heat extraction flow JNG11CF911XQ01 Four-channel waste heat extraction flow JNG41CF911XQ01 Primary circuit temperature JEC00FT601XP01 Two-channel waste heat extraction flow JNG21CF911XQ01 Boron concentration derived from waste heat in one channel JMN10CQ001XQ01 Boron concentration derived from three-channel waste heat JMN1CQ001XQ01 Four-channel waste heat extraction of boron concentration JMN40CQ001XQ01 Three-channel waste heat extraction flow JNG31CF911XQ01 Primary circuit level JEF10CL004XQ01 Spent fuel pool temperature FAK40CT901XQ01 Fuel tank level FAK10CL901XQ01 KBB12BB001 Liquid Level KBB12CL901XQ01 JNK10BB001 Liquid Level JNK40CL811XQ01 KBB11BB001 Liquid Level KBB11CL901XQ01 JNK10BB001 Liquid Level JNK10CL811XQ01 Boron concentration in FAK10 spent fuel pool FAK10CQ001XQ01 KBC12BB001 Liquid Level KBC12CL901XQ01 Boron concentration in FAK40 spent fuel pool FAK40CQ001XQ01 KBC11BB001 Liquid Level KBC11CL901XQ01 Primary / secondary circuit saturation temperature difference JAA00FT901ZQ01 Primary circuit heating / cooling rate JEC00FT601XP21

[0023] After selecting the measuring point, you need to set the logical judgment formula for a certain operation mode of a nuclear power unit, and click the "Edit" button to edit. Figure 3b As shown, edit the power plant measurement points in the editing interface, then select the judgment conditions and comparison thresholds to generate a logical judgment formula.

[0024] Furthermore, the step S2 is specifically as follows: The real-time value of each measuring point of the nuclear power unit is obtained from the DCS system, and the real-time value is substituted into the logic judgment formula to obtain the logic calculation value of the logic judgment formula.

[0025] like Figure 3b As shown, the system automatically obtains the real-time value of each measuring point from the DCS system, and then substitutes the real-time value into the logical judgment formula. For example, in the reactor power operation mode, the first judgment condition is that the real-time value 99.105 is greater than the threshold value 0.2, so the first judgment condition is "yes", and the second judgment condition is that the real-time value 324.935 is greater than 291.4, so the second judgment condition is "yes". The judgment values ​​of the two judgment conditions are logically ANDed, and the final calculation result of the logical judgment formula is "yes".

[0026] Furthermore, the step S3 is specifically as follows: There is only one logical calculation value of the logical judgment formula in each operation mode that is equal to "yes", and the operation state calculation result of the nuclear power unit is the operation model corresponding to the logical judgment formula whose logical calculation value is equal to "yes".

[0027] like Figure 3b As shown, among the calculation results of the logical judgment formulas of all operating modes, only the calculation result of "reactor power operating mode" is "yes", so the operating state calculation result is "reactor power operating mode".

[0028] Furthermore, the step S3 further includes: If the number of logical calculation values ​​of the logical judgment formula in each operating mode that is equal to "yes" is not the same, the logical judgment formula configuration is incorrect and the logical judgment formula should be modified.

[0029] For the same unit, there is only one calculation result for all operation modes that is yes. If there are multiple calculation results, it means that there is a problem with the calculation logic of the operation mode of a unit, and engineers need to modify the calculation logic based on experience. After modifying the logic, click Apply to update the calculation logic, use the experience of nuclear power operation staff, continuously optimize the model, and improve the accuracy of the model.

[0030] Furthermore, the step S4 is specifically as follows: The actual operating status of the nuclear power unit is obtained based on the daily unit inspection report. If the calculated operating status is different from the actual operating status, a configuration error alarm is issued, and the threshold and conditions of the logical judgment formula are modified. The operating status of the nuclear power unit is continued to be calculated based on the modified logical judgment formula.

[0031] On-site staff fill out a daily report after determining the actual operating status of the unit. If the actual operating status is different from the operating status calculated by the model, an alarm will be issued to warn the staff that the currently calculated operating status is abnormal and needs to be modified by logical judgment.

[0032] Furthermore, it also includes: When a nuclear power unit is undergoing overhaul, the unit operating status summarized in the daily report of the overhaul is compared with the unit operating status results calculated in real time. If there is any inconsistency, the time difference between the daily statistics and the regular meeting comparison is taken into consideration, and the current situation is comprehensively considered to determine the normal operating state of the unit to determine whether to optimize the configured logical judgment formula, so as to improve the accuracy of the unit operating status calculation results.

[0033] The unit operating status calculation logic based on the optimization of the current unit overhaul will be applied to the next overhaul of the current unit. After continuous optimization of multiple overhauls, the results of the actual overhaul operating status calculated through real-time data will become more and more accurate.

[0034] Furthermore, it also includes: The operation status calculation result is shared with the staff related to the nuclear power unit, and before performing nuclear power operations, the safety status of the current operation is judged based on the operation status calculation result.

[0035] The model's operating status calculation results are shared so that relevant staff can share the operating status of the nuclear power unit in real time, ensuring the safe operation of the unit and the safety of nuclear power workers.

[0036] Embodiment 2: This embodiment provides a nuclear power unit operation mode calculation device, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the nuclear power unit operation mode calculation method described in embodiment 1 is implemented.

[0037] The nuclear power unit operation mode calculation device provided in this embodiment is used to implement the nuclear power unit operation mode calculation method. Therefore, the technical effects possessed by the nuclear power unit operation mode calculation method are also possessed by the nuclear power unit operation mode calculation device, which will not be repeated here.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present invention should be covered by the present invention.

Claims

1. A method for calculating the operation mode of a nuclear power unit, characterized in that: The following steps are involved: Step S1, selecting a corresponding measuring point for each operating mode of the nuclear power unit, and configuring a corresponding logical judgment formula for each operating model based on the measuring point; Step S2, obtaining the real-time value of each measuring point of the nuclear power unit, and calculating the logical calculation value of the logical judgment formula based on the real-time value; Step S3, obtaining a calculation result of the operating state of the nuclear power unit according to the logical calculation value of the logical judgment formula; Step S4, obtaining the actual operating status of the nuclear power unit, comparing the actual operating status with the operating status calculation result, and modifying the logical judgment formula based on the comparison result.

2. The method for calculating the operation mode of a nuclear power unit according to claim 1, characterized in that: The step S1 is specifically as follows: A plurality of judgment conditions are set in each operation mode of the nuclear power unit, each judgment condition includes a comparison value of a measuring point and a judgment condition, and a logical operation is performed based on the plurality of judgment conditions to obtain a logical judgment formula of a corresponding operation model.

3. The method for calculating the operation mode of a nuclear power unit according to claim 1, characterized in that: The step S2 is specifically as follows: The real-time value of each measuring point of the nuclear power unit is obtained from the DCS system, and the real-time value is substituted into the logic judgment formula to obtain the logic calculation value of the logic judgment formula.

4. The method for calculating the operation mode of a nuclear power unit according to claim 1, characterized in that: The step S3 is specifically as follows: There is only one logical calculation value of the logical judgment formula in each operation mode that is equal to "yes", and the operation state calculation result of the nuclear power unit is the operation model corresponding to the logical judgment formula whose logical calculation value is equal to "yes".

5. The method for calculating the operation mode of a nuclear power unit according to claim 1, characterized in that: The step S3 further comprises: If the number of logical calculation values ​​of the logical judgment formula in each operating mode that is equal to "yes" is not the same, the logical judgment formula configuration is incorrect and the logical judgment formula should be modified.

6. The method for calculating the operation mode of a nuclear power unit according to claim 1, characterized in that: The step S4 is specifically as follows: The actual operating status of the nuclear power unit is obtained based on the daily unit inspection report. If the calculated operating status is different from the actual operating status, a configuration error alarm is issued, and the threshold and conditions of the logical judgment formula are modified. The operating status of the nuclear power unit is continued to be calculated based on the modified logical judgment formula.

7. The method for calculating the operation mode of a nuclear power unit according to claim 1, characterized in that: Also includes: During the overhaul of nuclear power units, the logical judgment formulas under each operating mode are optimized based on the operating status of the daily report of the overhaul.

8. The method for calculating the operation mode of a nuclear power unit according to claim 1, characterized in that: Also includes: The operation status calculation result is shared with the staff related to the nuclear power unit, and before performing nuclear power operations, the safety status of the current operation is judged based on the operation status calculation result.

9. A nuclear power unit operation mode calculation device, characterized in that: It comprises a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, a method for calculating the operation mode of a nuclear power unit as claimed in any one of claims 1 to 8 is implemented.

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