Method and system for judging shutdown early-warning state of primary loop of high-temperature gas cooled reactor
Through the method of multiple redundant signal acquisition channels and negative change rate judgment, the misjudgment problem caused by inaccurate acquisition of the primary circuit pressure signal of the high-temperature gas-cooled reactor was solved, and the shutdown warning status judgment with high real-time and high safety was achieved.
Patent Information
- Application Number
- CN202510497946.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2025-09-05
AI Technical Summary
The inaccurate acquisition of the primary circuit pressure signal of the traditional high-temperature gas-cooled reactor leads to the misjudgment of the shutdown warning status, especially the single-channel threshold is more likely to mistakenly issue an alarm signal.
Multiple redundant signal acquisition channels are used to collect pressure signals. The negative change rate is calculated by comparing the current maximum pressure signal with the historical pressure signal, and then compared with the preset action threshold to ensure signal validity and real-time performance.
The accuracy and real-time performance of pressure signal acquisition are improved, the occurrence of malfunctions is reduced, and the safety and flexibility of the primary circuit of the high-temperature gas-cooled reactor are ensured.
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Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of nuclear power plant monitoring, and in particular to a method and system for judging the shutdown warning state of a primary circuit of a high-temperature gas-cooled reactor. Background Art
[0002] High-temperature gas-cooled reactor (HTGR) nuclear power plants use inert gases such as helium or argon as coolant and graphite as moderator. The primary pressure vessel (PVO) of a HTGR consists of the reactor pressure vessel, steam generator, and hot gas duct. It is a critical component of the primary coolant pressure boundary and a key component of the primary circulation loop. The primary pressure vessel serves as a safety barrier to prevent radioactive leaks from HTGRs. While traditional pressurized water reactors (PWRs) use water as coolant, HTGRs use gas as coolant. Gas is more susceptible to leakage than liquids, placing more stringent pressure monitoring requirements on the primary pressure loop of HTGRs. Throughout the lifecycle of a HTGR nuclear power plant, abnormal changes in the primary pressure loop ensure timely alarm and shutdown signals. Therefore, real-time and accurate monitoring of primary pressure changes is essential. Primary pressure changes are primarily measured through the negative rate of change indicator, making calculation of the negative rate of change crucial. Traditionally, calculating the negative rate of change of primary-circuit pressure requires first calculating the maximum value of the pressure signal. Using a traversal comparison method, the pressure signals are compared sequentially from the beginning to the current state, obtaining the maximum value and recording it. This method suffers from issues such as low real-time performance and limited flexibility. Traditionally, threshold comparisons for determining the negative rate of change are performed using a single-channel approach, with only the threshold comparison result of one channel serving as the basis for determining whether to issue a shutdown alarm. This can easily lead to false detections in one channel, resulting in an erroneous shutdown alarm. Summary of the Invention
[0003] In view of this, the present invention provides a method and system for judging the shutdown warning status of the primary circuit of a high-temperature gas-cooled reactor. The main purpose is to solve the current problem of misjudgment of the shutdown warning status due to inaccurate pressure signal acquisition of the primary circuit of a high-temperature gas-cooled reactor.
[0004] To solve the above problems, the present application provides a method for determining the shutdown warning state of a primary circuit of a high-temperature gas-cooled reactor, comprising: Using multiple redundant signal acquisition channels to acquire pressure signals from a primary circuit of a high-temperature gas-cooled reactor, and obtaining pressure signals corresponding to each of the redundant signal acquisition channels; When each of the pressure signals is a valid signal, each of the pressure signals is compared with a historical maximum pressure signal in a current cycle to obtain a current maximum pressure signal; Performing calculations based on the current maximum pressure signal and each of the pressure signals to obtain a negative change rate of the pressure signal corresponding to each of the redundant signal acquisition channels; A warning state judgment is performed based on the negative change rate of each pressure signal and a preset action threshold, and a shutdown warning state judgment result of the primary circuit of the high-temperature gas-cooled reactor is obtained.
[0005] Optionally, when each of the pressure signals is a valid signal, before comparing each of the pressure signals with a historical maximum pressure signal in a current cycle, the method further comprises: judging the validity of each of the pressure signals; The determining of the validity of each of the pressure signals specifically includes: detecting a signal value and a quality bit of the same pressure signal, and determining that the same pressure signal is a normal signal when the signal value of the same pressure signal falls within a preset pressure range and the quality bit is normal; Counting the number of the normal signals to obtain a first quantity value; When the first quantity value is greater than a first preset quantity threshold, determining each of the pressure signals as a valid pressure signal; When the first quantity value is less than or equal to the first preset quantity threshold, each of the pressure signals is determined to be an invalid pressure signal, and multiple redundant signal acquisition channels are used to collect pressure signals of the primary circuit of the high temperature gas-cooled reactor for the next cycle.
[0006] Optionally, the comparing each of the pressure signals with a historical maximum pressure signal in a current period to obtain a current maximum pressure signal specifically includes: Each of the pressure signals is compared with the historical maximum pressure signal, and the maximum pressure signal among each of the pressure signals and the historical maximum pressure signal is determined as the current maximum pressure signal.
[0007] Optionally, after comparing each of the pressure signals with a historical maximum pressure signal in a current cycle to obtain a current maximum pressure signal, the method further includes: updating the effective pressure signal value of the current cycle based on each of the pressure signals; The historical maximum pressure signal of the current cycle is updated based on the current maximum pressure signal.
[0008] Optionally, updating the effective pressure signal value of the current period based on each of the pressure signals specifically includes: Saving the pressure signal and the time stamp carried by the pressure signal at the end of a preset sliding window; The historical pressure signal at the head end of the preset sliding window is removed to update the effective pressure signal value of the current period.
[0009] Optionally, the performing calculation based on the current maximum pressure signal and each of the pressure signals to obtain a negative change rate of the pressure signal corresponding to each of the redundant signal acquisition channels specifically includes: Performing a subtraction operation based on each of the pressure signals and the current maximum pressure signal to obtain a pressure change value corresponding to each of the redundant signal acquisition channels; A division operation is performed based on each of the pressure change values and the current cycle to obtain the negative change rate of the pressure signal corresponding to each of the redundant signal acquisition channels.
[0010] Optionally, performing warning state judgment based on the negative change rate of each pressure signal and a preset action threshold to obtain a shutdown warning state judgment result of the primary circuit of the high-temperature gas-cooled reactor specifically includes: Based on the comparison between the negative change rate of each pressure signal and the preset action threshold, a threshold comparison result corresponding to each redundant signal acquisition channel is obtained; When the threshold comparison result shows that the negative change rate of the pressure signal is greater than or equal to the preset action threshold and the number of redundant signal acquisition channels whose negative change rate of the pressure signal is greater than or equal to the preset action threshold is greater than or equal to a second preset number threshold, it is determined that the current state is a shutdown warning state.
[0011] To solve the above problems, the present application provides a shutdown warning status judgment system for a primary circuit of a high-temperature gas-cooled reactor, comprising: An acquisition device for acquiring pressure signals from a primary circuit of a high-temperature gas-cooled reactor using a plurality of redundant signal acquisition channels to obtain pressure signals corresponding to each of the redundant signal acquisition channels; a comparing device for comparing each of the pressure signals with a historical maximum pressure signal in a current cycle to obtain a current maximum pressure signal when each of the pressure signals is a valid signal; a calculation device for performing calculation processing based on the current maximum pressure signal and each of the pressure signals to obtain a negative change rate of the pressure signal corresponding to each of the redundant signal acquisition channels; The judgment device is used to perform warning state judgment based on the negative change rate of each pressure signal and a preset action threshold, and obtain a shutdown warning state judgment result of the primary circuit of the high-temperature gas-cooled reactor.
[0012] Optionally, the system further includes a validity judgment device, which is used to detect the signal value and quality bit of the same pressure signal, and determine that the same pressure signal is a normal signal when the signal value of the same pressure signal falls within a preset pressure range and the quality bit is normal; count the number of normal signals to obtain a first quantity value; when the first quantity value is greater than a first preset quantity threshold, determine that each pressure signal is a valid pressure signal; when the first quantity value is less than or equal to the first preset quantity threshold, determine that each pressure signal is an invalid pressure signal, and use multiple redundant signal acquisition channels to collect the pressure signal of the first loop of the high-temperature gas-cooled reactor for the next cycle.
[0013] Optionally, the comparison device is specifically used to compare each of the pressure signals with the historical maximum pressure signal, and determine the maximum pressure signal among each of the pressure signals and the historical maximum pressure signal as the current maximum pressure signal.
[0014] The beneficial effects of the present application: The present application is based on the actual needs of high-temperature gas-cooled reactors, combined with the high real-time, high sensitivity and high safety requirements for the primary-loop pressure changes of high-temperature gas-cooled reactors, and analyzes the current status and problems of monitoring primary-loop pressure changes. The method adopts a signal acquisition method with multiple redundant channels to ensure that the collected signals are all valid values; the present application only needs to record the historical maximum pressure signal of the current cycle and compare it with the various voltage signals obtained by current sampling to obtain the maximum value of the pressure signal, without traversing all historical data and current pressure signals, with real-time performance and improved flexibility; avoiding the problem of inaccurate maximum value calculation; for the result processing of threshold comparison, a warning state judgment method based on the negative change rate of each pressure signal and the preset action threshold is adopted, which greatly reduces the occurrence of false operations.
[0015] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings: Figure 1 A flow chart of a method for determining a shutdown warning state of a primary circuit of a high-temperature gas-cooled reactor provided in an embodiment of the present application is shown; Figure 2 A schematic flow chart of a method for determining a shutdown warning state of a primary circuit of a high-temperature gas-cooled reactor provided in an embodiment of the present application is shown; Figure 3 A structural block diagram of a shutdown warning state judgment system for a primary circuit of a high-temperature gas-cooled reactor provided in an embodiment of the present application is shown. DETAILED DESCRIPTION
[0017] Various aspects and features of the present application are described herein with reference to the accompanying drawings.
[0018] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but merely as an example of an embodiment. Other modifications within the scope and spirit of the present application will occur to those skilled in the art.
[0019] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.
[0020] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.
[0021] It should also be understood that although the present application has been described with reference to certain specific examples, those skilled in the art will readily be able to implement many other equivalent forms of the present application.
[0022] The above and other aspects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
[0023] Specific embodiments of the present application will be described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments described are merely examples of the present application and may be implemented in a variety of ways. Familiar and / or repetitive functions and structures are not described in detail to avoid obscuring the present application with unnecessary or redundant details. Therefore, the specific structural and functional details described herein are not intended to be limiting, but rather serve merely as a basis and representative basis for the claims to teach those skilled in the art to variously utilize the present application with substantially any suitable detailed structure.
[0024] This description may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may all refer to one or more of the same or different embodiments according to the present application.
[0025] The embodiment of the present application provides a method for determining the shutdown warning state of a high-temperature gas-cooled reactor primary circuit, such as Figure 1 As shown, including: Step S101: using multiple redundant signal acquisition channels to acquire pressure signals from a primary circuit of a high-temperature gas-cooled reactor, and obtaining pressure signals corresponding to each of the redundant signal acquisition channels; In a specific implementation process, multiple redundant signal acquisition channels are used to acquire the gas pressure parameters of the primary circuit of the high-temperature gas-cooled reactor to obtain pressure signals corresponding to each of the redundant signal acquisition channels; Step S102: when each of the pressure signals is a valid signal, comparing each of the pressure signals with the historical maximum pressure signal in the current cycle to obtain the current maximum pressure signal; During the specific implementation process, the historical maximum pressure signal stored in the prediction sliding window is obtained; each of the pressure signals is compared with the historical maximum pressure signal; and the maximum pressure signal among each of the pressure signals and the historical maximum pressure signal is determined as the current maximum pressure signal.
[0026] Step S103: performing calculations based on the current maximum pressure signal and each of the pressure signals to obtain a negative change rate of the pressure signal corresponding to each of the redundant signal acquisition channels; During the specific implementation process, a subtraction operation is performed based on each of the pressure signals and the current maximum pressure signal to obtain the pressure change value corresponding to each of the redundant signal acquisition channels; and a division operation is performed based on each of the pressure change values and the current cycle to obtain the negative change rate of the pressure signal corresponding to each of the redundant signal acquisition channels.
[0027] Step S104: performing a warning state judgment based on the negative change rate of each pressure signal and a preset action threshold, and obtaining a shutdown warning state judgment result of the primary circuit of the high temperature gas-cooled reactor.
[0028] During the specific implementation process, based on the comparison between the negative change rate of each pressure signal and the preset action threshold, a threshold comparison result corresponding to each redundant signal acquisition channel is obtained; when the threshold comparison result is that the negative change rate of the pressure signal is greater than or equal to the preset action threshold and the number of redundant signal acquisition channels whose negative change rate of the pressure signal is greater than or equal to the preset action threshold is greater than or equal to a second preset number threshold, it is judged that the current state is a shutdown warning state.
[0029] This application is based on the actual needs of high-temperature gas-cooled reactors, combined with the high real-time, high sensitivity and high safety requirements for the primary-loop pressure changes of high-temperature gas-cooled reactors, and analyzes the current status and problems of monitoring primary-loop pressure changes. The method adopts a signal acquisition method with multiple redundant channels to ensure that the acquired signals are all valid values; this application only needs to record the historical maximum pressure signal of the current cycle and compare it with the voltage signals obtained by the current sampling to obtain the maximum value of the pressure signal, without traversing all historical data and the current pressure signal, with real-time performance and improved flexibility; avoiding the problem of inaccurate maximum value calculation; for the result processing of threshold comparison, a warning state judgment method based on the negative change rate of each pressure signal and the preset action threshold is adopted, which greatly reduces the occurrence of false operations.
[0030] Another embodiment of the present application provides another method for determining the shutdown warning state of a primary circuit of a high-temperature gas-cooled reactor, such as Figure 2 As shown, including: Step S201: using multiple redundant signal acquisition channels to acquire pressure signals from a primary circuit of a high-temperature gas-cooled reactor, and obtaining pressure signals corresponding to each of the redundant signal acquisition channels; During the specific implementation of this step, multiple redundant signal acquisition channels are used to collect gas pressure parameters of the primary circuit of the high-temperature gas-cooled reactor, obtaining pressure signals corresponding to each redundant signal acquisition channel. For example, the multiple redundant signal acquisition channels can be set to four redundant signal acquisition channels or eight redundant signal acquisition channels. The number of redundant signal acquisition channels can be set based on actual needs.
[0031] Step S202: detecting the signal value and quality bit of the same pressure signal, and determining that the same pressure signal is a normal signal when the signal value of the same pressure signal falls within a preset pressure range and the quality bit is normal; During the specific implementation of this step, it is determined one by one whether the pressure signal falls within the preset pressure range; for example: when there are four redundant signal acquisition channels, namely redundant signal acquisition channel A, redundant signal acquisition channel B, redundant signal acquisition channel C and redundant signal acquisition channel D, redundant signal acquisition channel A acquires pressure signal a, redundant signal acquisition channel B acquires pressure signal b, redundant signal acquisition channel C acquires pressure signal c, and redundant signal acquisition channel D acquires pressure signal d; the preset pressure range can be [0, 9] MPa, where the first preset limit value is 0 and the second preset limit value is 9. When the signal value of the pressure signal is greater than or equal to the first preset limit value and less than or equal to the second preset limit value, it is determined that the pressure signal falls within the preset pressure range; when the quality level does not have abnormal conditions such as noise and vibration, it is determined that the quality level is normal; when the signal value of the same pressure signal is greater than or equal to the first preset limit value and less than or equal to the second preset limit value and the quality level is normal, it is determined that the same pressure signal is a normal signal.
[0032] Step S203: Counting the number of normal signals to obtain a first number value; During the specific implementation of this step, the number of normal signals in each of the pressure signals is calculated to obtain the first quantity value.
[0033] Step S204: when the first quantity value is greater than a first preset quantity threshold, determining each of the pressure signals as a valid pressure signal; During the specific implementation of this step, when there are 4 redundant signal acquisition channels, the first preset number threshold value may be 2. When the first number value is greater than 2, each of the pressure signals is determined to be a valid pressure signal; when there are 8 redundant signal acquisition channels, the first preset number threshold value may be 4. When the first number value is greater than 4, each of the pressure signals is determined to be a valid pressure signal; in actual applications, the number of the redundant signal acquisition channels is 2 times the first preset threshold value. The number of signal acquisition channels may be set according to actual needs, so that it is possible to more accurately determine whether the pressure signals currently acquired by the multiple redundant signal acquisition channels are valid signals, thereby reducing the probability of false alarms.
[0034] Step S205: when the first quantity value is less than or equal to the first preset quantity threshold, determining that each of the pressure signals is an invalid pressure signal, and using multiple redundant signal acquisition channels to acquire pressure signals for the primary circuit of the high temperature gas-cooled reactor in the next cycle; During the specific implementation of this step, when the first quantity value is less than or equal to the first preset quantity threshold, each of the pressure signals is determined to be an invalid pressure signal; when the collected pressure signal has noise, vibration or exceeds the range, the signal collection is inaccurate, and the currently collected pressure signals are discarded, and multiple redundant signal acquisition channels are used to collect the pressure signal of the first circuit of the high-temperature gas-cooled reactor for the next cycle.
[0035] Step S206: when each of the pressure signals is a valid signal, comparing each of the pressure signals with the historical maximum pressure signal in the current cycle to obtain the current maximum pressure signal; During the specific implementation of this step, each of the pressure signals is compared with the historical maximum pressure signal, and the maximum pressure signal among each of the pressure signals and the historical maximum pressure signal is determined as the current maximum pressure signal.
[0036] Step S207: updating the effective pressure signal value of the current cycle based on each of the pressure signals; During the specific implementation of this step, the pressure signal and the time stamp carried by the pressure signal are saved at the end of the preset sliding window; the historical pressure signal at the head end of the preset sliding window is removed to update the effective pressure signal value of the current cycle. Specifically, the present application pre-constructs a sliding window S for storing the effective pressure signal value Y within a cycle; when a new pressure signal is input, the signal value Y of the pressure signal should first be compared with the signal value Y_max of the historical maximum pressure signal in the preset sliding window; if the pressure signal value Y is greater than Y_max, the signal value Y of the pressure signal and the time stamp corresponding to the signal value Y are recorded, the maximum value of the pressure signal of the current cycle is updated to Y, and stored in the sliding window S; if the signal value Y is less than or equal to Y_max, the signal value Y and the time stamp corresponding to the signal value Y are recorded and stored in the sliding window S; after each new pressure signal value is input, the sliding window S will simultaneously remove the earliest stored pressure signal value at the head end of the sliding window S to achieve the effect of window sliding.
[0037] Step S208: updating the historical maximum pressure signal of the current cycle based on the current maximum pressure signal; During the specific implementation of this step, the pre-built variable storing the maximum pressure signal is updated to the signal value corresponding to the current maximum pressure signal.
[0038] Step S209: performing a subtraction operation based on each of the pressure signals and the current maximum pressure signal to obtain a pressure change value corresponding to each of the redundant signal acquisition channels; During the specific implementation of this step, a subtraction operation is performed based on each of the pressure signals and the current maximum pressure signal to obtain a pressure change value ΔY corresponding to each of the redundant signal acquisition channels.
[0039] Step S210: performing a division operation based on each of the pressure change values and the current cycle to obtain the negative change rate of the pressure signal corresponding to each of the redundant signal acquisition channels; During the specific implementation of this step, a division operation is performed based on each of the pressure change values and the current period T to obtain the pressure signal negative change rate F corresponding to each of the redundant signal acquisition channels.
[0040] Step S211: Comparing the negative change rate of each pressure signal with the preset action threshold to obtain a threshold comparison result corresponding to each redundant signal acquisition channel; During the specific implementation of this step, the preset threshold is the action setting value D of the negative change rate obtained by calibration; the action setting value D is compared with the negative change rate F to obtain the threshold comparison result corresponding to each of the redundant signal acquisition channels.
[0041] Step S212: When the threshold comparison result shows that the negative change rate of the pressure signal is greater than or equal to the preset action threshold and the number of redundant signal acquisition channels whose negative change rate of the pressure signal is greater than or equal to the preset action threshold is greater than or equal to a second preset number threshold, determining that the current state is a shutdown warning state; During the specific implementation of this step, when the threshold comparison result shows that the negative change rate of the pressure signal is greater than or equal to the preset action threshold, and the number of redundant signal acquisition channels with the negative change rate of the pressure signal greater than or equal to the preset action threshold is greater than or equal to a second preset number threshold, the current state is determined to be a reactor trip warning state. For example, when there are four redundant signal acquisition channels, namely redundant signal acquisition channel 1, redundant signal acquisition channel 2, redundant signal acquisition channel 3, and redundant signal acquisition channel 4, and the threshold comparison result for redundant signal acquisition channel 1 is A, the threshold comparison result for redundant signal acquisition channel 2 is B, the threshold comparison result for redundant signal acquisition channel 3 is C, and the threshold comparison result for redundant signal acquisition channel 4 is D; when the number of threshold comparison results A, B, C, and D with the negative change rate of the pressure signal greater than or equal to the preset action threshold is greater than or equal to the second preset number threshold, the current state is determined to be a reactor trip warning state. The second preset number threshold can be 2. When there are eight redundant signal acquisition channels, the second preset number threshold can be 4. The second preset number threshold can be set according to actual needs. When the threshold comparison result is that the negative change rate of the pressure signal is greater than or equal to the preset action threshold and the number of redundant signal acquisition channels whose negative change rate of the pressure signal is greater than or equal to the preset action threshold is less than the second preset number threshold, it is determined that the current state is a non-shutdown warning state and there is no need to output a shutdown warning signal to the predetermined shutdown device.
[0042] Step S213: controlling the output of a shutdown warning signal to a predetermined shutdown device to perform a shutdown operation on the high temperature gas-cooled reactor.
[0043] During the specific implementation of this step, when the current state is the shutdown warning state, the shutdown warning signal is controlled to be output to the predetermined shutdown device.
[0044] The present application uses multiple redundant signal acquisition channels to collect pressure signals from a high-temperature gas-cooled reactor circuit, and obtains pressure signals corresponding to each of the redundant signal acquisition channels; it can ensure the screening of valid pressure signals and ensure the accuracy of the final result; it detects the signal value and quality bit of the same pressure signal, and when the signal value of the same pressure signal falls within the preset pressure range and the quality bit is normal, it determines that the same pressure signal is a normal signal; it counts the number of normal signals to obtain a first quantity value; when the first quantity value is equal to the first preset quantity threshold, it determines that each of the pressure signals is a valid pressure signal. In calculating the maximum value of the pressure signal, a sliding window algorithm is used to obtain the maximum value, avoiding the problem of inaccurate maximum value calculation; in processing the results of the threshold comparison, a warning state judgment method based on the negative change rate of each pressure signal and the preset action threshold is adopted, which greatly reduces the occurrence of false actions.
[0045] Another embodiment of the present application provides a shutdown warning state judgment system for a primary circuit of a high-temperature gas-cooled reactor, such as Figure 3 As shown, including: An acquisition device 1 is configured to acquire pressure signals from a primary circuit of a high-temperature gas-cooled reactor using multiple redundant signal acquisition channels to obtain pressure signals corresponding to each of the redundant signal acquisition channels; Comparison device 2, for comparing each of the pressure signals with a historical maximum pressure signal in a current cycle when each of the pressure signals is a valid signal, to obtain a current maximum pressure signal; Calculation device 3, used for performing calculation processing based on the current maximum pressure signal and each of the pressure signals to obtain a negative change rate of the pressure signal corresponding to each of the redundant signal acquisition channels; The judgment device 4 is used to perform warning state judgment based on the negative change rate of each pressure signal and a preset action threshold, and obtain a shutdown warning state judgment result of the primary circuit of the high-temperature gas-cooled reactor.
[0046] During the specific implementation process, the system also includes: a validity judgment device, which is specifically used to detect the signal value and quality bit of the same pressure signal, and when the signal value of the same pressure signal falls within the preset pressure range and the quality bit is normal, determine that the same pressure signal is a normal signal; count the number of normal signals to obtain a first quantity value; when the first quantity value is greater than a first preset quantity threshold, determine that each pressure signal is a valid pressure signal; when the first quantity value is less than or equal to the first preset quantity threshold, determine that each pressure signal is an invalid pressure signal, and use multiple redundant signal acquisition channels to collect the pressure signal of the first loop of the high-temperature gas-cooled reactor for the next cycle.
[0047] In a specific implementation process, the comparison device 2 is specifically used to compare each of the pressure signals with the historical maximum pressure signal, and determine the maximum pressure signal between each of the pressure signals and the historical maximum pressure signal as the current maximum pressure signal.
[0048] In a specific implementation process, the system further includes an updating device, which is specifically used to: update the effective pressure signal value of the current cycle based on each of the pressure signals; and update the historical maximum pressure signal of the current cycle based on the current maximum pressure signal.
[0049] During the specific implementation process, the updating device is also used to: save the pressure signal and the time stamp carried by the pressure signal at the tail end of the preset sliding window; remove the historical pressure signal at the head end of the preset sliding window to update the effective pressure signal value of the current period.
[0050] During the specific implementation process, the calculation device 3 is specifically used to: perform subtraction processing based on each of the pressure signals and the current maximum pressure signal to obtain the pressure change value corresponding to each of the redundant signal acquisition channels; perform division processing based on each of the pressure change values and the current cycle to obtain the negative change rate of the pressure signal corresponding to each of the redundant signal acquisition channels.
[0051] During the specific implementation process, the judgment device 4 is specifically used to: obtain a threshold comparison result corresponding to each redundant signal acquisition channel based on the comparison of the negative change rate of each pressure signal and the preset action threshold; when the threshold comparison result is that the negative change rate of the pressure signal is greater than or equal to the preset action threshold and the number of redundant signal acquisition channels whose negative change rate of the pressure signal is greater than or equal to the preset action threshold is greater than or equal to a second preset number threshold, judge that the current state is a shutdown warning state.
[0052] The present application uses multiple redundant signal acquisition channels to collect pressure signals from a high-temperature gas-cooled reactor circuit, and obtains pressure signals corresponding to each of the redundant signal acquisition channels; it can ensure the screening of valid pressure signals and ensure the accuracy of the final result; it detects the signal value and quality bit of the same pressure signal, and when the signal value of the same pressure signal falls within the preset pressure range and the quality bit is normal, it determines that the same pressure signal is a normal signal; it counts the number of normal signals to obtain a first quantity value; when the first quantity value is greater than a first preset quantity threshold, it determines that each of the pressure signals is a valid pressure signal. In calculating the maximum value of the pressure signal, a sliding window algorithm is used to obtain the maximum value, avoiding the problem of inaccurate maximum value calculation; in processing the results of the threshold comparison, a warning state judgment method based on the negative change rate of each pressure signal and the preset action threshold is adopted, which greatly reduces the occurrence of false actions.
[0053] The above embodiments are merely exemplary embodiments of the present application and are not intended to limit the scope of the present application. The scope of protection of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and scope of protection of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present application.
Claims
1. A method for determining the shutdown warning state of a primary circuit of a high-temperature gas-cooled reactor, characterized in that: include: Using multiple redundant signal acquisition channels to acquire pressure signals from a primary circuit of a high-temperature gas-cooled reactor, and obtaining pressure signals corresponding to each of the redundant signal acquisition channels; When each of the pressure signals is a valid signal, each of the pressure signals is compared with a historical maximum pressure signal in a current cycle to obtain a current maximum pressure signal; Performing calculations based on the current maximum pressure signal and each of the pressure signals to obtain a negative change rate of the pressure signal corresponding to each of the redundant signal acquisition channels; A warning state judgment is performed based on the negative change rate of each pressure signal and a preset action threshold, and a shutdown warning state judgment result of the primary circuit of the high-temperature gas-cooled reactor is obtained.
2. The method according to claim 1, wherein When each of the pressure signals is a valid signal, before comparing each of the pressure signals with a historical maximum pressure signal in a current cycle, the method further includes: judging the validity of each of the pressure signals; The determining of the validity of each of the pressure signals specifically includes: detecting a signal value and a quality bit of the same pressure signal, and determining that the same pressure signal is a normal signal when the signal value of the same pressure signal falls within a preset pressure range and the quality bit is normal; Counting the number of the normal signals to obtain a first quantity value; When the first quantity value is greater than a first preset quantity threshold, determining each of the pressure signals as a valid pressure signal; When the first quantity value is less than or equal to the first preset quantity threshold, each of the pressure signals is determined to be an invalid pressure signal, and multiple redundant signal acquisition channels are used to collect pressure signals of the primary circuit of the high temperature gas-cooled reactor for the next cycle.
3. The method according to claim 1, wherein Comparing each of the pressure signals with the historical maximum pressure signal in the current cycle to obtain the current maximum pressure signal specifically includes: Each of the pressure signals is compared with the historical maximum pressure signal, and the maximum pressure signal among each of the pressure signals and the historical maximum pressure signal is determined as the current maximum pressure signal.
4. The method according to claim 1, wherein After comparing each of the pressure signals with a historical maximum pressure signal in a current cycle to obtain a current maximum pressure signal, the method further includes: updating the effective pressure signal value of the current cycle based on each of the pressure signals; The historical maximum pressure signal of the current cycle is updated based on the current maximum pressure signal.
5. The method according to claim 4, wherein The updating of the effective pressure signal value of the current cycle based on each of the pressure signals specifically includes: Saving the pressure signal and the time stamp carried by the pressure signal at the end of a preset sliding window; The historical pressure signal at the head end of the preset sliding window is removed to update the effective pressure signal value of the current period.
6. The method according to claim 1, wherein The calculating and processing based on the current maximum pressure signal and each of the pressure signals to obtain the negative change rate of the pressure signal corresponding to each of the redundant signal acquisition channels specifically includes: Performing a subtraction operation based on each of the pressure signals and the current maximum pressure signal to obtain a pressure change value corresponding to each of the redundant signal acquisition channels; A division operation is performed based on each of the pressure change values and the current cycle to obtain the negative change rate of the pressure signal corresponding to each of the redundant signal acquisition channels.
7. The method according to claim 1, wherein The step of performing a warning state judgment based on the negative change rate of each pressure signal and a preset action threshold to obtain a shutdown warning state judgment result of the primary circuit of the high-temperature gas-cooled reactor specifically includes: Based on the comparison between the negative change rate of each pressure signal and the preset action threshold, a threshold comparison result corresponding to each redundant signal acquisition channel is obtained; When the threshold comparison result shows that the negative change rate of the pressure signal is greater than or equal to the preset action threshold and the number of redundant signal acquisition channels whose negative change rate of the pressure signal is greater than or equal to the preset action threshold is greater than or equal to a second preset number threshold, it is determined that the current state is a shutdown warning state.
8. A shutdown warning status judgment system for a primary circuit of a high-temperature gas-cooled reactor, characterized in that: include: An acquisition device for acquiring pressure signals from a primary circuit of a high-temperature gas-cooled reactor using a plurality of redundant signal acquisition channels to obtain pressure signals corresponding to each of the redundant signal acquisition channels; a comparing device for comparing each of the pressure signals with a historical maximum pressure signal in a current cycle to obtain a current maximum pressure signal when each of the pressure signals is a valid signal; a calculation device for performing calculation processing based on the current maximum pressure signal and each of the pressure signals to obtain a negative change rate of the pressure signal corresponding to each of the redundant signal acquisition channels; The judgment device is used to perform warning state judgment based on the negative change rate of each pressure signal and a preset action threshold, and obtain a shutdown warning state judgment result of the primary circuit of the high-temperature gas-cooled reactor.
9. The system according to claim 8, wherein The system further includes a validity judgment device, which is used to detect the signal value and quality bit of the same pressure signal, and determine that the same pressure signal is a normal signal when the signal value of the same pressure signal falls within a preset pressure range and the quality bit is normal; Counting the number of the normal signals to obtain a first quantity value; when the first quantity value is greater than a first preset quantity threshold, determining that each of the pressure signals is a valid pressure signal; when the first quantity value is less than or equal to the first preset quantity threshold, determining that each of the pressure signals is an invalid pressure signal, and using multiple redundant signal acquisition channels to collect pressure signals for the first circuit of the high-temperature gas-cooled reactor in the next cycle.
10. The system according to claim 8, wherein The comparison device is specifically used to compare each of the pressure signals with the historical maximum pressure signal, and determine the maximum pressure signal between each of the pressure signals and the historical maximum pressure signal as the current maximum pressure signal.