A method and system for analyzing system faults through response time online testing

Abstract

The application discloses a method and system for analyzing system failure through online test of response time, comprising the following steps: calculating a first probability distribution function and a maximum value of theoretical response time based on system response time; obtaining real response time of the system through real-time measurement by using an online test method of response time; confirming whether the real response time satisfies the first probability distribution function through chi-square fitting test method; changing the size of each component of system response time when calculating the theoretical value to obtain a second probability distribution function different from the first probability distribution function when the real response time does not satisfy the first probability distribution function; confirming whether the real response time satisfies the second probability distribution function through chi-square fitting test method again, and if yes, the link of response time error is deduced reversely. 2 The application analyzes system failure through online test of response time. 2 The application analyzes system failure through online test of response time.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power plants and online testing, and in particular to a method and system for analyzing system failures through online testing of response time. Background Art

[0002] The existing testing method for nuclear power plant reactor protection systems relies on an offline approach. Each test must be performed during a reactor shutdown and requires the removal of external cables. After testing, reinstallation and verification are required, which is time-consuming and labor-intensive, preventing full automation.

[0003] However, existing nuclear power plant reactor protection devices do not have an online testing method for response time, and are unable to promptly detect time performance defects in the system.

[0004] In view of this, this application is hereby filed. Summary of the Invention

[0005] The purpose of the present invention is to provide a method and system for analyzing system failures through online response time testing. The present invention is based on online response time testing, which obtains response time data in real time. Through analysis, the actual response time probability distribution curve can be calculated and compared with the probability distribution curve obtained by theoretical analysis to find out whether the various components of the response time are working normally, and the possible abnormalities can be deduced through the deviation range.

[0006] The present invention is achieved through the following technical solutions:

[0007] In a first aspect, the present invention provides a method for analyzing system failures through online response time testing, the method comprising:

[0008] Step A: Based on the system response time, a first probability distribution function and a maximum value of the theoretical response time are calculated by a theoretical method;

[0009] Step B: Use the online response time test method to measure the actual response time of the system in real time;

[0010] Step C: Through χ 2 Fitting test method, confirming whether the actual response time satisfies the first probability distribution function;

[0011] Step D: When the actual response time does not satisfy the first probability distribution function, the size of each component of the system response time is changed during the theoretical calculation, thereby obtaining a second probability distribution function different from the first probability distribution function; again through χ 2 The fitting test method confirms whether the actual response time satisfies the second probability distribution function. If so, the error link of the actual response time is deduced.

[0012] Further, the method further comprises:

[0013] When the real response time satisfies the first probability distribution function, there is no link of real response time error.

[0014] Further, the system response time refers to the response time of the nuclear power plant reactor protection device.

[0015] Further, the system response time includes signal acquisition time T1, set value comparison time T2, data exchange time T3, logic processing time T4, and signal output time T5, and the system response time is equal to the sum of the signal acquisition time, the set value comparison time, the data exchange time, the logic processing time, and the signal output time.

[0016] Further, step B comprises:

[0017] At the signal acquisition end, when the starting signal is collected, the starting signal is added with a natural number sequence, and the value of the natural sequence is 1, 2, 3, …;

[0018] The starting signal and the natural number sequence added thereto are taken as starting data and sent to the response time online test device and the set value comparison link, and the starting data is marked with a time identifier by the response time online test device, denoted as Tstart.

[0019] After the set value comparison link is processed, the starting data with the natural number sequence is sent to the communication link, the logic processing link, and the signal output link in turn;

[0020] When the ending signal is collected, the ending signal and the natural number sequence added thereto are taken as ending data and sent to the response time online test device and output an action; meanwhile, the ending data is marked with a time identifier by the response time online test device, denoted as Tend.

[0021] The starting signal time identifier Tstart corresponding to the ending signal is found out through the sequence number of the ending signal; Tend-Tstart is the real response time x1 obtained by one-time measurement.

[0022] According to the above method, a plurality of real response times x n , n = 1, 2, 3, ….

[0023] Further, step D comprises:

[0024] Step D1, when the real response time does not satisfy the first probability distribution function F 理论 (t), only T1 theoretical value T 1理论 is changed from 0-T 理论max on the basis of other invariants, and the single-step step length is determined by T 理论max , T理论max is the maximum value of the theoretical response time; repeat step A for each step, and calculate the second probability distribution function F' of the response time through the theoretical value 理论 (t) and the maximum value of the response time T' 理论max ;

[0025] Step D2: Determine the maximum value of the response time T' 理论max and the actual response time x1, x2, x3…x n The maximum value in ;

[0026] Step D3: If the maximum value of the response time T' 理论max Less than the actual response time x1, x2, x3…x n The maximum value among them, then repeat steps D1 and D2;

[0027] Step D4: If the maximum value of the response time T' 理论max Greater than or equal to the actual response time x1, x2, x3…x n The maximum value among them, repeat step C;

[0028] Step D5: When the actual response time satisfies the second probability distribution function F' 理论 (t), it is judged that the T1 link has a fault;

[0029] Step D6: When the actual response time does not satisfy the second probability distribution function F' 理论 (t), then change the theoretical value of T2 T on the basis of other unchanged 2理论 , the same method from step D1 to step D5 is used for positioning until all theoretical values ​​T are traversed 1理论 ~T 5理论 .

[0030] Furthermore, step D also includes:

[0031] Step D7, if all theoretical values ​​T are traversed 1理论 ~T 5理论 If the fault link is not located, then all theoretical values ​​T are traversed by combining the signal acquisition time T1, the fixed value comparison time T2, the data exchange time T3, the logic processing time T4 and the signal output time T5 using the method from step D1 to step D6. 1理论 ~T 5理论 All combinations of are used for positioning.

[0032] In a second aspect, the present invention further provides a system for analyzing system failures through online response time testing, the system using the above-mentioned method for analyzing system failures through online response time testing; the system comprises:

[0033] a theoretical calculation unit, configured to calculate a maximum value of a first probability distribution function and a theoretical response time based on a system response time and using theoretical values;

[0034] Online measurement unit, used to measure the real response time of the system in real time using the online test method of response time;

[0035] Fit test unit, used to pass χ 2 Fitting test method, confirming whether the actual response time satisfies the first probability distribution function;

[0036] The fault location unit is used to change the size of each component of the system response time when calculating the theoretical value when the actual response time does not meet the first probability distribution function, so as to obtain a second probability distribution function different from the first probability distribution function; and again through χ 2 The fitting test method confirms whether the actual response time satisfies the second probability distribution function. If so, the link where the actual response time is erroneous is deduced. When the actual response time satisfies the first probability distribution function, there is no link where the actual response time is erroneous.

[0037] Furthermore, system response time refers to the response time of the nuclear power plant reactor protection device;

[0038] The system response time includes signal acquisition time, constant value comparison time, data exchange time, logic processing time and signal output time, and the system response time is equal to the sum of signal acquisition time, constant value comparison time, data exchange time, logic processing time and signal output time.

[0039] Furthermore, the execution process of the online measurement unit is as follows:

[0040] At the signal acquisition end, after the start signal is acquired, a natural number sequence is added to the start signal, where the value of the natural number sequence is a positive integer;

[0041] The start signal together with the natural number sequence number added thereto is used as the start data and sent to the response time online test device and the fixed value comparison link, and the response time online test device adds a time mark to the start data, which is recorded as Tstart;

[0042] After the customized comparison link is processed, the starting data with the natural number sequence is sent to the communication link, the logic processing link and the signal output link in sequence;

[0043] After the end signal is collected, the end signal and the natural number sequence number added thereto are sent as the end data to the response time online test device and the action is output; at the same time, the response time online test device adds a time mark to the end data, which is recorded as T end;

[0044] According to the sequence number of the end signal, find the corresponding start signal time mark Tstart; Tend-Tstart is the actual response time x1 obtained by a measurement;

[0045] According to the above process, multiple real response times x are obtained. n , n is a positive integer.

[0046] In a third aspect, the present invention provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method for analyzing system failures through online response time testing is implemented.

[0047] In a fourth aspect, the present invention further provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the above-mentioned method for analyzing system failures through online response time testing.

[0048] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0049] The present invention provides a method and system for analyzing system failures through online response time testing. The present invention determines whether a system failure occurs through online response time testing and analysis. (1) Through online response time testing, while the device is working, by comparing the measured response time data with the theoretical calculation data, it can be found whether there is an abnormality in each response time component of the device; (2) The present invention uses χ 2 Fitting test method is used to assist in fault location. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0051] Figure 1 This is a flow chart of a method for analyzing system failures through online response time testing of the present invention;

[0052] Figure 2 Schematic diagram of the composition of the response time of the system of the present invention;

[0053] Figure 3 Schematic diagram of the online test method for the response time of a reactor protection device in a nuclear power plant according to the present invention;

[0054] Figure 4 This is a system structure diagram of the present invention for analyzing system failures through online response time testing. DETAILED DESCRIPTION

[0055] The terms used in various embodiments of the present invention are only used to describe the purpose of specific embodiments and are not intended to limit the various embodiments of the present invention. As used herein, the singular form is intended to also include the plural form, unless the context clearly indicates otherwise. Unless otherwise limited, all terms used here (including technical terms and scientific terms) have the same meaning as those of ordinary skill in the art generally understood by the various embodiments of the present invention. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meaning as the contextual meaning in the relevant technical field and will not be interpreted as having idealized meaning or too formal meaning, unless clearly defined in various embodiments of the present invention.

[0056] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0057] The existing nuclear power plant reactor protection devices do not have an online test method for response time, and are unable to promptly detect time performance defects in the system. The present invention designs a method and system for analyzing system failures through online response time testing. First, the system's response time distribution function F(t) is obtained through theoretical calculation. Then, the online response time testing method can be used to measure the system's actual response time in real time. When the actual response time data is large enough, the χ 2 The fitting test method confirms whether the measured value satisfies the F(t) distribution. If it does not satisfy the F(t) distribution, in the theoretical calculation, the size of each component of the system response time is changed to obtain different F'(t), and the χ 2 The fitting test method confirms whether the measured value satisfies the F'(t) distribution. If so, the link where the response time error occurs can be deduced.

[0058] Example 1

[0059] like Figure 1 As shown, the present invention provides a method for analyzing system failures through online response time testing, the method comprising:

[0060] Step A: Based on the system response time, calculate the first probability distribution function F by theoretical method 理论 (t) and the maximum value of the theoretical response time;

[0061] Step B: Use the online response time test method to measure the actual response time of the system in real time;

[0062] Step C: When the data of the actual measured response time is large enough, 2Fitting test method to confirm whether the actual response time satisfies the first probability distribution function F 理论 (t);

[0063] Step D: When the actual response time does not satisfy the first probability distribution function F 理论 (t), then in the theoretical calculation, the size of each component of the system response time is changed to obtain the first probability distribution function F 理论 (t) Different second probability distribution function F' 理论 (t); again through χ 2 The fitting test method confirms whether the actual response time satisfies the second probability distribution function F' 理论 (t), if it satisfies the requirement, then the link where the real response time is wrong can be deduced;

[0064] When the actual response time satisfies the first probability distribution function F 理论 (t), there is no link where the real response time is wrong.

[0065] In this embodiment, the system response time refers to the response time of the nuclear power plant reactor protection device. The system response time includes signal acquisition time, fixed value comparison time, data exchange time, logic processing time, and signal output time. The system response time is equal to the sum of signal acquisition time, fixed value comparison time, data exchange time, logic processing time, and signal output time.

[0066] Specifically, the system response time T=T1+T2+T3+T4+T5, where: T1 is the signal acquisition time, T2 is the fixed value comparison time, T3 is the data exchange time, T4 is the logic processing time, and T5 is the signal output time.

[0067] The specific implementation is as follows:

[0068] Step A: Based on the system response time, through T 1理论 、T 2理论 、T 3理论 、T 4理论 and T 5理论 Calculate the probability distribution function of the response time (ie the first probability distribution function F 理论 (t)) and the maximum value of the response time T 理论max .

[0069] Step B: Use the online response time test method to measure the real response time of the system in real time. Figure 2 It can be analyzed that the essence of system response time is a process of signal A flowing to signal B, such as Figure 3 shown.

[0070] Specifically, step B includes:

[0071] Step B1: At the signal acquisition end, after the start signal (signal A) is collected, a natural number sequence is added to the start signal, where the natural number is 1, 2, 3, etc.;

[0072] Step B2: Send the start signal (A signal) along with its added natural number sequence as the start data to the response time online test device and the fixed value comparison link. The response time online test device adds a time stamp to the start data, which is recorded as Tstart.

[0073] Step B3: After the customized comparison link is processed, the starting data with the natural number sequence is sent to the next link in sequence, and this step is repeated through the communication link and the logic processing link until the data reaches the last signal output link.

[0074] In step B4, after the end signal (B signal) is collected, the end signal and its added natural number sequence are sent as end data to the response time online test device and the action is output; at the same time, the response time online test device adds a time stamp to the end data, which is recorded as T end;

[0075] Step B5: Find the corresponding start signal (A signal) time mark Tstart through the sequence number of the end signal (B signal); Tend-Tstart is the actual response time x1 obtained by a measurement;

[0076] Step B6: According to the above method, multiple real response times x1, x2, x3...x n , n=1,2,3….

[0077] from Figure 3 As can be seen, A and A', and B and B', are not consistent. That is, Tend - Tstart is not the actual signal response time. To ensure engineering applications, the signal acquisition and output cycles must be sufficiently fast, at least an order of magnitude faster than the actual response time of BA. If BA is in the second range, the signal acquisition and output cycles should be in the millisecond range to ensure effective engineering applications.

[0078] Step C: Through χ 2 The fitting test method tests whether the measured value meets the F 理论 (t).

[0079] If the conditions are met, repeat step B6 to update the measured response time value, and then repeat step C again for the next round of testing.

[0080] Step D: Step D includes:

[0081] Step D1: When the actual response time does not satisfy the first probability distribution function F 理论(t), then on the basis of other unchanged, only the theoretical value of T1 is changed first. 1理论 , from 0-T 理论max , the single step length is determined by T 理论max OK, T 理论max is the maximum value of the theoretical response time; if T 理论max If the response time is in the second level, the step can be made in millisecond level. Repeat step A for each step and calculate the second probability distribution function F' of the response time by theoretical value. 理论 (t) and the maximum value of the response time T' 理论max ;

[0082] Step D2: Determine the maximum value of the response time T' 理论max and the actual response time x1, x2, x3…x n The maximum value in ;

[0083] Step D3: If the maximum value of the response time T' 理论max Less than the actual response time x1, x2, x3…x n The maximum value among them, then repeat steps D1 and D2;

[0084] Step D4: If the maximum value of the response time T' 理论max Greater than or equal to the actual response time x1, x2, x3…x n The maximum value among them, repeat step C;

[0085] Step D5: When the actual response time satisfies the second probability distribution function F' 理论 (t), it is judged that the T1 link has a fault;

[0086] Step D6: When the actual response time does not satisfy the second probability distribution function F' 理论 (t), then change the theoretical value of T2 T on the basis of other unchanged 2理论 , the same method from step D1 to step D5 is used for positioning until all theoretical values ​​T are traversed 1理论 ~T 5理论 ;

[0087] Step D7, if all theoretical values ​​T are traversed 1理论 ~T 5理论 If the fault link is not located, then all theoretical values ​​T are traversed by combining the signal acquisition time T1, the fixed value comparison time T2, the data exchange time T3, the logic processing time T4 and the signal output time T5 using the method from step D1 to step D6. 1理论 ~T 5理论 All combinations of are used for positioning.

[0088] The present invention determines whether the system is faulty by online testing and analysis of the response time. (1) Through online testing of the response time, while the device is working, by comparing the measured response time data with the theoretical calculation data, it can be found whether there is any abnormality in the various response time components of the device. (2) The present invention determines whether the system is faulty by online testing and analysis of the response time. 2 Fitting test method is used to assist in fault location.

[0089] Example 2

[0090] like Figure 4 As shown, the difference between this embodiment and embodiment 1 is that this embodiment further provides a system for analyzing system faults through online response time testing. This system uses the method for analyzing system faults through online response time testing in embodiment 1. The system corresponds one-to-one to the method for analyzing system faults through online response time testing in embodiment 1. The system includes:

[0091] Theoretical calculation unit, used to calculate the first probability distribution function F based on the system response time through the theoretical value 理论 (t) and the maximum value of the theoretical response time;

[0092] Online measurement unit, used to measure the real response time of the system in real time using the online test method of response time;

[0093] Fit test unit, used to pass χ 2 Fitting test method to confirm whether the actual response time satisfies the first probability distribution function F 理论 (t);

[0094] The fault location unit is used to locate the fault when the actual response time does not meet the first probability distribution function F 理论 (t), then when calculating the theoretical value, the size of each component of the system response time is changed to obtain the first probability distribution function F 理论 (t) Different second probability distribution function F' 理论 (t); again through χ 2 The fitting test method confirms whether the actual response time satisfies the second probability distribution function F' 理论 (t), if it satisfies, then the link where the real response time is wrong can be deduced; when the real response time satisfies the first probability distribution function F 理论 (t), there is no link where the real response time is wrong.

[0095] As a further implementation, system response time refers to the response time of the nuclear power plant reactor protection device;

[0096] The system response time comprises a signal acquisition time T1, a constant comparison time T2, a data exchange time T3, a logic processing time T4 and a signal output time T5, and the system response time is equal to the sum of the signal acquisition time, the constant comparison time, the data exchange time, the logic processing time and the signal output time.

[0097] As a further implementation, the execution process of the online measurement unit is as follows:

[0098] At the signal acquisition end, after the start signal is acquired, the start signal is added with a natural number sequence number, and the value of the natural sequence number is a positive integer;

[0099] The start signal and the natural number sequence number added thereto are taken as start data and sent to the response time online testing device and the constant comparison link, and the start data is marked with a time identifier Tstart by the response time online testing device;

[0100] After the constant comparison link is processed, the start data with the natural number sequence number is sent to the communication link, the logic processing link and the signal output link in sequence;

[0101] After the end signal is acquired, the end signal and the natural number sequence number added thereto are taken as end data and sent to the response time online testing device and outputted; meanwhile, the end data is marked with a time identifier Tend by the response time online testing device;

[0102] The time identifier Tstart of the start signal corresponding to the sequence number of the end signal is found out, and Tend-Tstart is the real response time x1 obtained by one-time measurement;

[0103] According to the above process, a plurality of real response times x n are obtained, and n is a positive integer.

[0104] The execution process of each unit can be performed according to the method flow steps of the method for analyzing system faults through online response time testing in Embodiment 1, and will not be described again in this embodiment.

[0105] Meanwhile, the application further provides an electronic device comprising a memory, a processor and a computer program stored in the memory and capable of running on the processor, and the processor implements the above method for analyzing system faults through online response time testing when executing the computer program.

[0106] Meanwhile, the application further provides a computer readable storage medium, and the computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the above method for analyzing system faults through online response time testing.

[0107] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0108] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0109] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0110] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0111] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for analyzing system failures through online response time testing, characterized in that: The method includes: Step A: Based on the system response time, calculate the maximum value of the first probability distribution function and the theoretical response time through theoretical values; Step B: Use the online response time test method to measure the actual response time of the system in real time; Step C: Through χ 2 A fitting test method is used to confirm whether the actual response time satisfies a first probability distribution function; Step D: When the actual response time does not satisfy the first probability distribution function, the size of each component of the system response time is changed during the theoretical value calculation to obtain a second probability distribution function different from the first probability distribution function; and again by χ 2 The fitting test method confirms whether the actual response time satisfies the second probability distribution function. If so, the link where the response time is erroneous is deduced.

2. The method for analyzing system failures through online response time testing according to claim 1, characterized in that: The method further includes: When the actual response time satisfies the first probability distribution function, there is no link where the response time is erroneous.

3. The method for analyzing system failures through online response time testing according to claim 1, characterized in that: The system response time refers to the response time of the nuclear power plant reactor protection device.

4. The method for analyzing system failures through online response time testing according to claim 3, characterized in that: The system response time includes signal acquisition time T1, constant value comparison time T2, data exchange time T3, logic processing time T4 and signal output time T5, and the system response time is equal to the sum of signal acquisition time, constant value comparison time, data exchange time, logic processing time and signal output time.

5. The method for analyzing system failures through online response time testing according to claim 1, characterized in that: Step B includes: At the signal acquisition end, after the start signal is acquired, a natural number sequence is added to the start signal, where the value of the natural number sequence is a positive integer; The start signal together with the natural number sequence number added thereto is used as the start data and sent to the response time online test device and the fixed value comparison link, and the response time online test device adds a time mark to the start data, which is recorded as Tstart; After the customized comparison link is processed, the starting data with the natural number sequence is sent to the communication link, the logic processing link and the signal output link in sequence; After the end signal is collected, the end signal and the natural number sequence number added thereto are sent as the end data to the response time online test device and the action is output; at the same time, the response time online test device adds a time mark to the end data, which is recorded as T end; According to the sequence number of the end signal, find the corresponding start signal time mark Tstart; Tend-Tstart is the actual response time x1 obtained by a measurement; According to the above method, multiple real response times x are obtained. n , n is a positive integer.

6. The method for analyzing system failures through online response time testing according to claim 5, characterized in that: Step D includes: Step D1: When the actual response time does not satisfy the first probability distribution function F 理论 (t), only the theoretical value of T1 is changed first, from 0-T 理论max , the single step length is determined by T 理论max OK, T 理论max is the maximum value of the theoretical response time; repeat step A for each step, and calculate the second probability distribution function F' of the response time through the theoretical value 理论 (t) and the maximum value of the response time T' 理论max ; Step D2: Determine the maximum value of the response time T' 理论max and the actual response time x1, x2, x3…x n The maximum value in ; Step D3: If the maximum value of the response time T' 理论max Less than the actual response time x1, x2, x3…x n The maximum value among them, then repeat steps D1 and D2; Step D4: If the maximum value of the response time T' 理论max Greater than or equal to the actual response time x1, x2, x3…x n The maximum value among them, repeat step C; Step D5: When the actual response time satisfies the second probability distribution function F' 理论 (t), it is judged that the T1 link has a fault; Step D6: When the actual response time does not satisfy the second probability distribution function F' 理论 (t), then change the theoretical value of T2, and use the same method from step D1 to step D5 to perform positioning until all theoretical values ​​T1 to T5 are traversed.

7. The method for analyzing system failures through online response time testing according to claim 6, characterized in that: Step D also includes: Step D7: If the fault link is not located after traversing all theoretical values, then through the combination of signal acquisition time T1, fixed value comparison time T2, data exchange time T3, logic processing time T4 and signal output time T5, use the method of steps D1 to D6 to traverse all combinations of all theoretical values ​​and locate the fault link.

8. A system for analyzing system failures through online response time testing, characterized in that: The system includes: a theoretical calculation unit, configured to calculate a maximum value of a first probability distribution function and a theoretical response time based on a system response time and using theoretical values; Online measurement unit, used to measure the real response time of the system in real time using the online test method of response time; Fit test unit, used to pass χ 2 A fitting test method is used to confirm whether the actual response time satisfies a first probability distribution function; The fault location unit is configured to change the size of each component of the system response time when calculating the theoretical value when the actual response time does not satisfy the first probability distribution function, so as to obtain a second probability distribution function different from the first probability distribution function; and again calculate the value of the second probability distribution function by χ 2 The fitting test method confirms whether the actual response time satisfies the second probability distribution function. If so, the link where the response time is erroneous is deduced. When the actual response time satisfies the first probability distribution function, there is no link where the response time is erroneous.

9. The system for analyzing system failures through online response time testing according to claim 8, characterized in that: The system response time refers to the response time of the nuclear power plant reactor protection device; The system response time includes signal acquisition time, fixed value comparison time, data exchange time, logic processing time and signal output time, and the system response time is equal to the sum of signal acquisition time, fixed value comparison time, data exchange time, logic processing time and signal output time.

10. The system for analyzing system failures through online response time testing according to claim 8, characterized in that: The execution process of the online measurement unit is as follows: At the signal acquisition end, after the start signal is acquired, a natural number sequence is added to the start signal, where the value of the natural number sequence is a positive integer; The start signal together with the natural number sequence number added thereto is used as the start data and sent to the response time online test device and the fixed value comparison link, and the response time online test device adds a time mark to the start data, which is recorded as Tstart; After the customized comparison link is processed, the starting data with the natural number sequence is sent to the communication link, the logic processing link and the signal output link in sequence; After the end signal is collected, the end signal and the natural number sequence number added thereto are sent as the end data to the response time online test device and the action is output; at the same time, the response time online test device adds a time mark to the end data, which is recorded as T end; According to the sequence number of the end signal, find the corresponding start signal time mark Tstart; Tend-Tstart is the actual response time x1 obtained by a measurement; According to the above process, multiple real response times x are obtained. n , n is a positive integer.

11. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the method for analyzing system failures through online response time testing according to any one of claims 1 to 7 is implemented.

12. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for analyzing system failures through online response time testing according to any one of claims 1 to 7 is implemented.

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