A data collection and storage system and method

Abstract

The present invention provides a data acquisition and storage system and method. The data acquisition and storage system includes a data acquisition device and a data server. The data acquisition device is configured to: collect first data with a first time period as a cycle, and the first data includes data of hard-wired signals from other control systems of a nuclear power plant of the data acquisition device and data from non-safety-level field instruments of the nuclear power plant. The data server is connected to the operation control system of the nuclear power plant, other control systems of the nuclear power plant and the data acquisition device, and is configured to: obtain first data and second data. The second data includes data of network signals from other control systems of the nuclear power plant and data from a processor in the operation control system of the nuclear power plant. And, the first data is stored with a first time period or a third time period as a cycle; the second data is stored with a second time period or a third time period. The first time period is smaller than the second time period, and the second time period is smaller than the third time period.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical or electronic system control, and in particular to a data acquisition and storage system, and a data acquisition and storage method. Background Art

[0002] At present, in the control system of a nuclear power plant, according to the data collection cycle, the data collection and storage can be divided into two parts, one is the collection and storage of data with low time resolution, and the other is the collection and storage of data with high time resolution. The collection and storage of data with low time resolution is generally carried out in the Digital Instrument & Control System (DCS) of the nuclear power plant, and the staff can call and view the data with low time resolution on the second layer of the DCS. For the collection and storage of data with high time resolution, three systems independent of the DCS are generally set up, including the Test Data Acquisition System (IDA), the Transient Recording and Analysis System (TRA) and the Sequence of Event System (SOE) system. IDA can be used to collect test data with high time resolution, TRA can be used to record and analyze transient data, and SOE can be used to collect data of the sequence of events. The staff needs to view the data of the three systems in the computer room.

[0003] The second floor of the DCS is located in the main control room, so the staff usually operates in the main control room. When they need to view data with high time resolution, they need to move from the main control room to the computer room to view the data in the three systems of IDA, TRA and SOE. The main control room and the computer room are not in the same room, which causes inconvenience to the staff.

[0004] The number of signals collected by IDA, TRA and SOE is generally 800 to 1000. In order to avoid losing necessary data in tests and accident analysis with high response time requirements, these data need to be collected at high speed, which requires huge storage space, while the storage space of IDA, TRA and SOE systems is limited.

[0005] At the same time, if there is no hard-wired connection between a certain device in a nuclear power plant and IDA, TRA and SOE, it is difficult for IDA, TRA and SOE to collect data from the device. Therefore, the data sources of IDA, TRA and SOE are limited. If the data sources of IDA, TRA and SOE are to be expanded, it is necessary to re-lay cables to increase hard wiring, which is more troublesome. Summary of the invention

[0006] The technical problems to be solved by the present invention are: the staff cannot view or call the data with high time resolution in the main control room, the storage space of the IDA, TRA and SOE systems is limited, and the way to expand the data sources of IDA, TRA and SOE is relatively troublesome. In view of the above-mentioned shortcomings of the prior art, a data acquisition and storage system and method are provided, which can facilitate the operators and maintenance personnel in the main control room to view or call the data with high time resolution at the same time, save storage space, and facilitate the expansion of data sources.

[0007] In a first aspect, the present invention provides a data acquisition and storage system, which includes a data acquisition device and a data server. The data acquisition device is connected to the non-safety-level field instrument of the nuclear power plant and other control systems of the nuclear power plant, respectively, and is configured to: collect first data with a first time period as a cycle, and the first data includes data of hard-wired signals from other control systems of the nuclear power plant and data from the non-safety-level field instrument of the nuclear power plant. The data server is connected to the operation control system of the nuclear power plant, other control systems of the nuclear power plant and the data acquisition device, respectively; the operation control system of the nuclear power plant includes a non-safety-level DCS, and the processor of the non-safety-level DCS of the nuclear power plant processes data in a second time period; and the data server is configured to: obtain the first data and the second data. The second data includes data of network signals from other control systems of the nuclear power plant and data from the processor in the operation control system of the nuclear power plant. And, the first data is stored with a first time period or a third time period as a cycle; the second data is stored with a second time period or a third time period. The first time period is less than the second time period, and the second time period is less than the third time period.

[0008] The first data is data with the first time period as the collection period, and the second data is data with the second time period as the collection period. The first data belongs to data with high time resolution, and the second data belongs to data with low time resolution. Through the data acquisition and storage system provided by the present invention, the operator can view or call the first data and the second data in the main control room at the same time. In addition, when storing the first data, the first time period or the third time period can be selected. Since the first time period is smaller than the second time period, and the second time period is smaller than the third time period, the storage period of the first data can be smaller or larger. If the first time period is used as the storage period, a larger storage capacity needs to be occupied. If the third time period can be used as the storage period in the idle period or the stable operation period (such as when no test is performed), the storage capacity can be reduced while meeting the storage requirements to save storage space. Similarly, when storing the second data, the storage period can be selected, and the storage capacity can be reduced while meeting the storage requirements to save storage space. In addition, the data acquisition and storage system provided by the present invention is connected to both the safety-level DCS and the non-safety-level DCS, and most of the data from the nuclear power control system can be obtained, which is more convenient when expanding the data source.

[0009] Specifically, the data server is configured to: determine whether the first data acquired by the data server is transient data. If so, store the transient data in the latest fourth time period with the first time period as a period, and remove the transient data before the fourth time period; the fourth time period is greater than the first time period. If not, store the first data with the first time period or the third time period as a period.

[0010] Specifically, if the first data acquired by the data server is transient data and an accident occurs, the data server is configured to: acquire accident recall data, the accident recall data including transient data with the first time period as a storage period in the fifth time period before the accident and the sixth time period after the accident; the fifth time period is less than or equal to the fourth time period. And, generate an accident recall report according to the accident recall data, and store the accident recall report.

[0011] Specifically, if the first data acquired by the data server is not transient data, the data server is configured to: store the first data in a first time period as a cycle, and store the second data in a second time period as a cycle during the test. The test includes the commissioning and startup test of the nuclear power plant unit. And, before and / or after the test, store the first data and the second data in a third time period as a cycle.

[0012] Specifically, the first time period includes 25 ms.

[0013] Specifically, the range of the second time period includes [50ms, 200ms].

[0014] Specifically, the third time period includes 500 ms or 1000 ms.

[0015] The data acquisition and storage system provided by the present invention is connected to the control system of the nuclear power plant, so the operator can see different data through the interface of the operation control system of the nuclear power plant in the main control room, which provides convenience for the operator. Moreover, through the operation control system, the data acquisition and storage system provided by the embodiment of the present invention can obtain the data of all devices, which is helpful to expand the data source. In addition, different storage cycles are set for data of different periods, and data exceeding the fourth time period is deleted to reduce the storage amount of data in the non-test stage or the stage of normal operation of the nuclear power plant equipment, which can save storage space while ensuring the accident recall function.

[0016] In a second aspect, the present invention provides a data acquisition and storage method, which is applied to the data acquisition and storage system described in any of the above embodiments, and the data acquisition and storage method includes: collecting first data; acquiring first data and second data. The first data includes data of hard-wired signals from other control systems of the nuclear power plant and data from non-safety-level field instruments of the nuclear power plant; the second data includes data of network signals from other control systems of the nuclear power plant and data from processors in the operation control system of the nuclear power plant. And, the first data is stored in the first time period or the third time period as a period; the second data is stored in the second time period or the third time period. The first time period is smaller than the second time period, and the second time period is smaller than the third time period.

[0017] Specifically, the method further includes: determining whether the first data acquired by the data server is transient data. If so, storing the transient data in the latest fourth time period with the first time period as a period, and removing the transient data before the fourth time period; the fourth time period is greater than the first time period. If not, storing the first data with the first time period or the third time period as a period.

[0018] Specifically, the method further includes: if the first data acquired by the data server is transient data and an accident occurs, then acquiring accident recall data, the accident recall data including transient data with the first time period as a storage period in a fifth time period before the accident and a sixth time period after the accident; the fifth time period is less than or equal to the fourth time period. And, generating an accident recall report according to the accident recall data, and storing the accident recall report.

[0019] Specifically, the method further includes: in the test, storing the first data in a first time period as a cycle, and storing the second data in a second time period as a cycle; the test includes the commissioning and startup test of the nuclear power plant unit. And, before and / or after the test, storing the first data and the second data in a third time period as a cycle.

[0020] The beneficial effects of the data acquisition and storage method provided by the embodiment of the present invention are the same as the beneficial effects of the data acquisition and storage system in the above embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a structural diagram of a data acquisition and storage system in an embodiment of the present invention;

[0022] Figure 2 is a structural diagram of another data acquisition and storage system in an embodiment of the present invention;

[0023] Figure 3 A structural diagram of another data acquisition and storage system in an embodiment of the present invention;

[0024] Figure 4 is a flow chart of a data collection and storage method in an embodiment of the present invention;

[0025] Figure 5 The figure is a flow chart of another data collection and storage method in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] It should be understood that the specific embodiments and drawings described herein are only used to explain the present invention rather than to limit the present invention.

[0028] It can be understood that, in the absence of conflict, the various embodiments of the present invention and the various features in the embodiments can be combined with each other.

[0029] It can be understood that, for the convenience of description, the drawings of the present invention only show the parts related to the present invention, while the parts irrelevant to the present invention are not shown in the drawings.

[0030] It can be understood that each unit and module involved in the embodiments of the present invention may correspond to only one physical structure, or may be composed of multiple physical structures, or multiple units and modules may be integrated into one physical structure.

[0031] It can be understood that, without conflict, the functions and steps marked in the flowcharts and block diagrams of the present invention may occur in an order different from that marked in the drawings.

[0032] It is understood that the flowcharts and block diagrams of the present invention illustrate the possible architectures, functions, and operations of the systems, devices, equipment, and methods according to the various embodiments of the present invention. Each box in the flowchart or block diagram may represent a unit, module, program segment, or code, which contains executable instructions for implementing the specified functions. Moreover, each box or combination of boxes in the block diagram and flowchart may be implemented by a hardware-based system that implements the specified functions, or may be implemented by a combination of hardware and computer instructions.

[0033] It can be understood that the units and modules involved in the embodiments of the present invention can be implemented by software or hardware. For example, the units and modules can be located in a processor.

[0034] In view of the inconvenience of viewing data with different time resolutions, limited storage space, and troublesome expansion of data sources in existing nuclear power plants, an embodiment of the present invention provides a data acquisition and storage system and a data acquisition and storage method. The data acquisition and storage system provided by the embodiment of the present invention is connected to the control system of the nuclear power plant, so the operator can see different data through the interface of the operation control system of the nuclear power plant in the main control room, which provides convenience for the operator. Moreover, through the operation control system, the data acquisition and storage system provided by the embodiment of the present invention can obtain data from all devices, which is helpful to expand the data source. In addition, different storage cycles are set for data of different periods, and data exceeding the fourth time period is deleted to reduce the storage amount of data in the non-test stage or the stage of normal operation of nuclear power plant equipment, which can save storage space while ensuring the accident recall function.

[0035] The embodiment of the present invention provides a data collection and storage system, such as Figure 1 As shown, the data acquisition and storage system 10 includes a data acquisition device 101 and a data server 102 .

[0036] The data acquisition device 101 is respectively connected to the non-safety-level field instrument 20 of the nuclear power plant and the other control systems 40 of the nuclear power plant, and is configured to collect first data with a first time period as a cycle. The first data includes data of hard-wired signals from other control systems 40 of the nuclear power plant and data from the non-safety-level field instruments 20 of the nuclear power plant. The other control systems 40 of the nuclear power plant include a safety-level DCS, and the other control systems 40 of the nuclear power plant are connected to the safety-level field instruments 401. Exemplarily, the data of hard-wired signals from other control systems of the nuclear power plant can come from the safety-level field instruments 401. It can be understood that the safety and field instruments 401 and the non-safety-level field instruments 20 can each include multiple instruments. Exemplarily, as Figure 2As shown, the data acquisition device 101 may include a first IO board 1011, the first IO board 1011 may be a high-speed IO board, and the acquisition cycle of the first IO board 1011 may be a first time period. In some embodiments, the first time period is 25 ms.

[0037] In some embodiments, since the temperature change is relatively small, high-speed acquisition is not required, so the acquisition period of the temperature sensor data in the non-safety-level field instrument 20 can be higher than the first time period. For example, the data of the temperature sensor PT100 can use the second time period as the acquisition period.

[0038] like Figure 1 As shown, the data server 102 is connected to the operation control system 30 of the nuclear power plant, other control systems 40 of the nuclear power plant and the data acquisition device 101; the operation control system 30 of the nuclear power plant includes a non-safety-level DCS, and the processor 301 of the non-safety-level DCS of the nuclear power plant processes data in a second time period. In some embodiments, the range of the second time period is [50ms, 200ms].

[0039] The data server 102 is configured to: obtain the first data and the second data, and store the first data in the first time period or the third time period; store the second data in the second time period or the third time period; the first time period is shorter than the second time period, and the second time period is shorter than the third time period.

[0040] The second data includes data of network signals from other control systems 40 of the nuclear power plant and data of the processor 301 of the non-safety-level DCS in the operation control system 30 of the nuclear power plant. It can be understood that the processing period of the data of network signals of other control systems 40 of the nuclear power plant can also be the second time period. In some embodiments, the third time period can be a storage period of the database, for example, the third time period is 500ms or 1000ms.

[0041] Exemplarily, data of hard-wired signals from other control systems 40 of the nuclear power plant may be collected periodically at a first time period.

[0042] In the above embodiment, the first data is data with the first time period as the collection period, and the second data is data with the second time period as the collection period. Then the first data belongs to data with high time resolution, and the second data belongs to data with low time resolution. Through the data acquisition and storage system provided by the present invention, the operator can view or call the first data and the second data in the main control room at the same time. In addition, when storing the first data, the first time period or the third time period can be selected. Since the first time period is smaller than the second time period, and the second time period is smaller than the third time period, the storage period of the first data can be smaller or larger. If the first time period is used as the storage period, a larger storage capacity is required. If the third time period can be used as the storage period in the idle period or the stable operation period (such as when no test is performed), the storage capacity can be reduced while meeting the storage requirements to save storage space. Similarly, when storing the second data, the storage period can be selected, and the storage capacity can be reduced while meeting the storage requirements to save storage space. In addition, the data acquisition and storage system provided by the present invention is connected to both the safety-level DCS and the non-safety-level DCS, and most of the data from the nuclear power control system can be obtained, which is convenient when expanding the data source. Therefore, the data server 102 can obtain data of different collection cycles and set the storage cycle according to the data of different collection cycles, thereby improving the integration of data types and the flexibility of data storage.

[0043] In the process of executing tests by operation and process professionals, for most tests and accident analysis, not all variables need to be collected at high speed, but only some signals need to be collected at high speed. In order to collect the data related to the same test completely without increasing the storage burden of the system too much, it is necessary to set the storage rate for each variable. For example, in the 50% FP and 100% FP shutdown without stopping the reactor test, the temperature signal of the primary circuit system can fully meet the test requirements with a storage rate of 100ms.

[0044] In this case, the data server 102 is configured to: determine whether the first data obtained by the data server is transient data. If so, store the transient data in the latest fourth time period with the first time period as a period, and remove the transient data before the fourth time period; the fourth time period is greater than the first time period. If not, store the first data with the first time period or the third time period as a period.

[0045] Since the first time period is relatively short, when the data server 102 stores data using the first time period as the storage period, it may cause the data server 102 to have a large amount of data in a short period of time. However, if the data server 102 only stores transient data from the nuclear power plant within the most recent fourth time period, a large amount of storage space can be saved.

[0046] Exemplarily, the fourth time period may be 30 minutes or 60 minutes. The staff may set the fourth time period according to the specific conditions of the nuclear power plant. The present invention does not limit the specific value of the fourth time period.

[0047] For example, when the system space is insufficient, the instrumentation and control alarm may be used to remind the staff to export the data and transfer the data to other storage media.

[0048] The above-mentioned embodiments can realize continuous and rapid monitoring and recording of nuclear island parameters and conventional island parameters.

[0049] In some embodiments, if the first data acquired by the data server 102 is transient data and an accident occurs, the data server 102 is configured to: acquire accident recall data, generate an accident recall report based on the accident recall data, and store the accident recall report. The accident recall data includes transient data with the first time period as the storage period for the fifth time period before the accident and the sixth time period after the accident; the fifth time period is less than or equal to the fourth time period.

[0050] Since the data server 102 only stores the transient data of the most recent fourth time period, when an accident occurs, the time length of the data before the accident can be retrieved is at most the fourth time period, so the fifth time period is less than the fourth time period. For example, taking the fourth time period as 30 minutes as an example, when an accident occurs, the data within 30 minutes before the accident can be retrieved, and the fifth time period can be 10 minutes, 15 minutes or 20 minutes. The present invention does not limit the specific value of the fifth time period, and the staff of the nuclear power plant can take the value according to the setting of the fourth time period. It can be understood that the generated accident recall report can be stored separately, so the data of the sixth time period after the accident can be stored separately in the separate storage space for the convenience of staff to call. Therefore, the specific value of the sixth time period is not limited by the specific value of the fourth time period. For example, if the fourth time period is 30 minutes, the sixth time period can also be 40 minutes or 60 minutes. The specific value of the sixth time period can also be set by the staff of the nuclear power plant according to the situation of the nuclear power plant.

[0051] Exemplarily, the accident may include: a power outage accident, an accident of switching to a base load, or an emergency tripping accident. It is understandable that the staff may set transient data in the first data in advance based on experience, so as to facilitate the system to make autonomous judgments.

[0052] In some embodiments, if the same accident is triggered multiple times, an accident recall report is generated according to the accident recall data from the fifth time period before the earliest accident to the sixth time period after the last accident. The staff can call the accident recall report at any time and analyze the data in the accident recall report to trace the source of the accident.

[0053] In some embodiments, if the first data acquired by the data server 102 is not transient data, the data server 102 is configured to: store the first data in a first time period as a cycle, and store the second data in a second time period as a cycle during the test. And, before and / or after the test, store the first data and the second data in a third time period as a cycle. The test includes the commissioning and startup test of the nuclear power plant unit.

[0054] For example, the tests may include: checking the adjustment of various automatic control loops that affect unit operation and protection equipment and various tests performed during commercial operation.

[0055] It is understandable that the staff can set the test data in the first data in advance based on experience. In order to facilitate the staff to analyze based on the test data, during the test, the operator can set the test report generation frequency according to the test procedure, and the data server 102 can generate a test report based on the set generation frequency and the test data. For example, every 10 minutes, the data server 102 can generate a test report based on the test data.

[0056] For example, the data server 102 may be equipped with a data compression function and support setting a compression ratio. For example, during a non-test period, the data server 102 may store data according to a set compression ratio. During the test process, the data server 102 does not compress the data when storing.

[0057] Through the above embodiment, the first data can be stored only during the experiment with the first time period as a cycle, and the second data can be stored only during the second time period as a cycle. Before and after the experiment, the first data and the second data can be stored only during the third time period. In this way, the integrity and comprehensiveness of the data in the experiment can be guaranteed, and storage space can be saved at the same time.

[0058] In some embodiments, Figure 3 As shown, the data collection and storage system provided by the embodiment of the present invention may also include an analysis workstation 103 and a printer 104. The analysis workstation 103 and the printer 104 are connected to the data server 102 via a database agent 105. The staff can call the data and reports in the data server 102 at any time via the analysis workstation 103, and can print the data or reports required by the staff via the printer 104.

[0059] The data acquisition and storage system provided by the embodiment of the present invention can realize the functions of data acquisition, real-time data display, real-time data query, real-time data attribute viewing and modification, analog quantity over-range processing and switch quantity jitter processing. It not only meets the use requirements of maintenance personnel during testing and accident analysis, but also meets the use requirements of operators in the main control room.

[0060] A data collection and storage method provided by an embodiment of the present invention is described below.

[0061] The embodiment of the present invention provides a data collection and storage method, which is applied to a data collection and storage system in the above embodiment. Figure 4 As shown, the method includes steps 401 to 403.

[0062] Step 401: Collect data of non-safety-level field instruments of a nuclear power plant.

[0063] Step 402: Obtain first data and second data.

[0064] The first data includes data from hard-wire signals of other control systems of the nuclear power plant from the data acquisition device and data from field instruments of the nuclear power plant. The second data includes data from network signals of other control systems of the nuclear power plant and data from processors in the operation control system of the nuclear power plant.

[0065] Step 403: store the first data in the first time period or the third time period as a period; store the second data in the second time period or the third time period.

[0066] The first time period is shorter than the second time period, and the second time period is shorter than the third time period.

[0067] In some embodiments, Figure 5 As shown, the method further includes steps 501 to 505.

[0068] Step 501: Determine whether the first data acquired by the data server is transient data. If yes, proceed to step 502; otherwise, proceed to step 503.

[0069] Step 502: Taking the first time period as a cycle, store the transient data in the latest fourth time period, and remove the transient data before the fourth time period.

[0070] In step 502, the fourth time period is greater than the first time period.

[0071] And in step 502, if an accident occurs, the accident recall data is obtained, and an accident recall report is generated according to the accident recall data, and the accident recall report is stored.

[0072] The accident recall data includes transient data of a fifth time period before the accident and a sixth time period after the accident with the first time period as the storage period. The fifth time period is less than or equal to the fourth time period.

[0073] Step 503: store the first data in the first time period or the third time period as a period.

[0074] In some embodiments, the method further comprises: in the test, storing the first data in a first time period as a cycle, and storing the second data in a second time period as a cycle. Before and / or after the test, storing the first data and the second data in a third time period as a cycle. The test includes the commissioning and startup test of the nuclear power plant unit.

[0075] The beneficial effects of the data collection and storage method provided by the embodiment of the present invention can refer to the beneficial effects of the data collection and storage system in the above embodiment, which will not be described in detail here.

[0076] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A data acquisition and storage system, characterized in that: include: The data acquisition device is connected to the non-safety-level field instrument of the nuclear power plant and other control systems of the nuclear power plant respectively, and is configured to: collect first data with a first time period as a cycle; the first data includes data from the non-safety-level field instrument of the nuclear power plant and data of hard-wire signals from the other control systems of the nuclear power plant; the other control systems of the nuclear power plant include a safety-level DCS; The data server is connected to the operation control system of the nuclear power plant, other control systems of the nuclear power plant and the data acquisition device respectively; the operation control system of the nuclear power plant includes a non-safety-level digital instrumentation and control system DCS, and the processor of the non-safety-level DCS of the nuclear power plant processes data in a second time period; the data server is configured as follows: Acquire first data and second data; the second data includes data from network signals of the other control systems of the nuclear power plant and data from a processor in an operation control system of the nuclear power plant; storing the first data in the first time period or the third time period as a period; The second data is stored with the second time period or the third time period as a period; the first time period is shorter than the second time period, and the second time period is shorter than the third time period; as well as Determining whether the first data acquired by the data server is transient data; If yes, then taking the first time period as a period, storing the transient data in the latest fourth time period, and removing the transient data before the fourth time period; the fourth time period is greater than the first time period; If not, then in the test, the first data is stored with the first time period as a cycle, and the second data is stored with the second time period as a cycle; the test includes the commissioning and startup test of the nuclear power plant unit; and before and / or after the test, the first data and the second data are stored with the third time period as a cycle.

2. The data acquisition and storage system according to claim 1, characterized in that: If the first data acquired by the data server is transient data and an accident occurs, the data server is configured to: Acquire accident recall data, the accident recall data including the transient data with the first time period as a storage period in a fifth time period before the accident and a sixth time period after the accident; The fifth time period is less than or equal to the fourth time period; as well as An accident recall report is generated according to the accident recall data, and the accident recall report is stored.

3. The data acquisition and storage system according to claim 1 or 2, characterized in that: The first time period comprises 25 ms.

4. The data acquisition and storage system according to claim 1 or 2, characterized in that: The range of the second time period includes [50ms, 200ms].

5. The data acquisition and storage system according to claim 1 or 2, characterized in that: The third time period includes 500 ms or 1000 ms.

6. A data collection and storage method, applied to the data collection and storage system according to any one of claims 1 to 5; characterized in that: The method comprises: Collecting first data, wherein the first data includes data from the non-safety-level field instrument of the nuclear power plant and data from hard-line signals of other control systems of the nuclear power plant; Acquire first data and second data; the second data includes data from network signals of other control systems of the nuclear power plant and data from processors in the operation control system of the nuclear power plant; store the first data in the first time period or the third time period as a cycle; store the second data in the second time period or the third time period as a cycle; the first time period is shorter than the second time period, and the second time period is shorter than the third time period; and Determining whether the first data acquired by the data server is transient data; If yes, then taking the first time period as a period, storing the transient data in the latest fourth time period, and removing the transient data before the fourth time period; the fourth time period is greater than the first time period; If not, then in the test, the first data is stored with the first time period as a cycle, and the second data is stored with the second time period as a cycle; the test includes the commissioning and startup test of the nuclear power plant unit; and before and / or after the test, the first data and the second data are stored with the third time period as a cycle.

7. The data collection and storage method according to claim 6, characterized in that: Also includes: If the first data acquired by the data server is transient data and an accident occurs, then acquiring accident recall data, the accident recall data including the transient data in a fifth time period before the accident and a sixth time period after the accident with the first time period as a storage period; The fifth time period is less than or equal to the fourth time period; as well as An accident recall report is generated according to the accident recall data, and the accident recall report is stored.

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