A relay detection device and detection method for a nuclear power plant power system

Abstract

The present invention discloses a relay detection device and a detection method for a nuclear power plant power system, which relates to the field of relay detection and includes an acquisition module, a processing module, and an evaluation and warning module. The present invention can regularly collect data of the relays in the power system, thereby extracting various aspects of data information of the relay, that is, including the status data and performance data of the relay, and based on the collected status data and performance data of the relay, periodically analyze the status and status changes of the relay, so as to more accurately understand the operation of the relay. On the one hand, it can provide data support for the subsequent improvement of the relay, and on the other hand, it can accurately grasp the changes of the relay, so as to perform timely maintenance when the relay appears abnormal, and the detection of the relay by this method is more accurate, enabling the staff to understand the status of the relay more thoroughly.

Description

Technical Field

[0001] The present invention relates to the field of relay detection, and particularly to a relay detection device and a detection method for a nuclear power plant power system. Background Art

[0002] As is well known, a relay is an electrical control device widely used in circuits to achieve functions such as switching, protection, and control. Its basic principle is to use changes in current or voltage to control the opening and closing of a circuit. When a relay is in use, in order to ensure its performance and safety in use, regular detection of the relay is an essential step;

[0003] For example, the authorized announcement number is CN112858898B, the authorized announcement date is April 4, 2023, and the name is a relay fault detection method applied to an elevator four-quadrant frequency converter system. The elevator four-quadrant frequency converter system includes: a power grid, a rectifier, an inverter, and a motor connected in sequence, and also includes a three-phase relay. The three-phase relay is connected between the three-phase ends of the power grid and the three-phase AC ends of the rectifier; the relay fault detection method includes: controlling the rectifier to operate without load and the inverter not to operate; providing a preset reactive current to the rectifier and obtaining the magnitudes of the three-phase instantaneous currents in the three-phase relay after a preset time...;

[0004] Similar to the above application, in existing relay detection devices or detection methods, most are to regularly use detection tools manually, perform various performance detections on the relay by reaching the position of the relay with the tools, and then perform corresponding processing according to the detection results. This detection method has low detection efficiency, cannot accurately understand the state of the relay, affects the safety of the entire power system, and there are also some monitoring structures directly installed on the relay to monitor the relay, but their monitoring effects are average, and during monitoring, there is a lack of analysis of the changes in the relay, so the warning effect is limited. Summary of the Invention

[0005] (I) Object of the Invention

[0006] In view of this, the object of the present invention is to provide a relay detection device and a detection method for a nuclear power plant power system. Through this detection method, data of the relay in the power system can be collected regularly, so as to extract various data information of the relay, and based on the collected state data and performance data of the relay, the state and state changes of the relay are analyzed periodically, so as to more accurately understand the operation of the relay and achieve the effect of improving the safety of the power system.

[0007] (II) Technical Solution

[0008] To achieve the above technical objectives, the present invention provides a relay detection device for a nuclear power plant power system, which includes:

[0009] An acquisition module configured to acquire the operation data of the relay to be detected, where the operation data includes status data and performance data, the status data includes the temperature data and key part image data of the relay, and the performance data includes the power-on and power-off response times of the relay;

[0010] A processing module configured to analyze and process the operation data of the acquired relay to obtain the periodic change index of the relay within one acquisition cycle;

[0011] An evaluation and early warning module configured to perform status evaluation on the relay according to the periodic change index of the relay, and generate different early warning instructions based on the evaluation results

[0012] The present invention also discloses a method for detecting a relay in a nuclear power plant power system. The specific detection steps are as follows:

[0013] Acquire the operation data of the relay to be detected;

[0014] Analyze the operation data to generate the periodic change index of the relay;

[0015] Based on the periodic change index of the relay to be detected, perform status evaluation on the relay, and generate different early warning instructions based on the evaluation results.

[0016] As a further description of the above technical solution: The operation data includes status data and performance data, where the status data includes the temperature data and key part image data of the relay, and the performance data includes the power-on and power-off response times of the relay.

[0017] As a further description of the above technical solution: The method for analyzing the operation data to generate the periodic change index of the relay is as follows:

[0018] Set the acquisition cycle. Within one acquisition cycle, the preset time interval for acquiring status data is , then the temperatures of the acquired relay are recorded in sequence as: , and the images of the key parts of the acquired relay are recorded in sequence as: , where, is the temperature of the relay acquired for the th time, is the image of the key part of the relay acquired for the th time;

[0019] Based on the temperature and key part image of the relay, calculate and generate the temperature change coefficient and image change coefficient of the relay;

[0020] Calculate and generate the performance change coefficient of the relay based on the energization and de-energization response times of the relay;

[0021] Generate the periodic change index of the relay within one acquisition period based on the temperature change coefficient, image change coefficient, and performance change coefficient of the relay.

[0022] As a further description of the above technical solution: The method for generating the temperature change coefficient of the relay is as follows:

[0023] Extract the temperature change value of the relay in each time interval within one acquisition period, denoted as . Then, the average temperature change coefficient of the relay within this acquisition period is:

[0024] ;

[0025] Wherein, is the average temperature change coefficient of the relay within one acquisition period, is the temperature change value of the relay collected at the th and the th times within one acquisition period, is the maximum temperature change value of the relay collected within one acquisition period, is the minimum temperature change value of the relay collected within one acquisition period, is the number of acquisitions.

[0026] As a further description of the above technical solution: The method for generating the image change coefficient of the relay is as follows:

[0027] Extract the acquired image of the key part of the relay within one acquisition period and the original image

[0028] of the key part of the relay; Compare the acquired image with the original image respectively. When there are differences between the two, calculate the difference degree of the image

[0029] ; Generate the image change coefficient of the relay within this acquisition period based on the difference degree of the image

[0030] As a further description of the above technical solution: The method for calculating the difference degree of the image is as follows:

[0031] Compare the acquired image with the original image Perform fusion analysis to extract the difference factors in the acquired image. Among them, the difference factor is the difference parameter between the acquired image and the original image, and the difference parameter includes the number of different parts and the area of the different parts between the acquired image and the original image;

[0032] Based on the difference factors of the acquired image, generate the difference degree of the acquired image, specifically as follows;

[0033] ;

[0034] Among them, is the difference degree of the acquired image, is the number of different parts between the acquired image and the original image, is the area of the th different part between the acquired image and the original image.

[0035] As a further description of the above technical solution: The method for generating the image change coefficient of the relay based on the difference degree of the image is as follows:

[0036] ;

[0037] Among them, is the image change coefficient of the relay within one acquisition period, is the difference degree of the th acquired image within one acquisition period, is the difference between the difference degrees of the th and the th acquired images within one acquisition period, is the number of acquisitions within one acquisition period, , takes an integer greater than 1.

[0038] As a further description of the above technical solution: The method for generating the performance change coefficient of the relay based on the energization and de-energization response times of the relay is as follows:

[0039] Extract the energization and de-energization response times of the initial relay, denoted as and respectively, and the energization and de-energization response times of the relay after one acquisition period, denoted as and respectively. Then the performance change coefficient of the relay is:

[0040] ;

[0041] Among them, is the performance change coefficient of the relay within one acquisition period.

[0042] As a further description of the above technical solution: The method for generating the periodic change index of the relay is as follows:

[0043] ;

[0044] wherein, is the periodic change index of the relay within one acquisition period, is the average temperature change coefficient of the relay within one acquisition period, is the image change coefficient of the relay within one acquisition period, is the performance change coefficient of the relay within one acquisition period, is the weight factor, are all greater than 0.

[0045] As a further description of the above technical solution: Based on the periodic change index of the relay to be detected, the method for evaluating the state of the relay and generating different warning instructions based on the evaluation result is as follows:

[0046] Preset the periodic change index threshold of the relay as , wherein, ;

[0047] If , then evaluate that the relay is in a normal state and no warning instruction is generated;

[0048] If , then evaluate that the relay is in a preliminary abnormal state and a first warning instruction is generated;

[0049] If , then evaluate that the relay is in a serious abnormal state and a second warning instruction is generated, wherein the warning levels of the first warning instruction and the second warning instruction gradually increase.

[0050] In the above technical solution, a relay detection device and a detection method for a nuclear power plant power system provided by the present invention can regularly collect data of the relay in the power system through this detection method, so as to extract various data information of the relay, that is, including the state data and performance data of the relay, and based on the collected state data and performance data of the relay, analyze the state and state change of the relay periodically, so that the operation condition of the relay can be understood more accurately. On the one hand, it can provide data support for the subsequent improvement of the relay, and on the other hand, it can accurately master the change of the relay, so as to perform timely maintenance when the relay is abnormal, and the detection of the relay by this method is more accurate, enabling the staff to understand the state of the relay more thoroughly. Description of the Drawings

[0051] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0052] Figure 1 It is a flowchart of a method for detecting a relay in a nuclear power plant power system provided by the present invention;

[0053] Figure 2 It is a schematic block diagram of relay operation data in a method for detecting a relay in a nuclear power plant power system provided by the present invention;

[0054] Figure 3 It is a schematic structural diagram of a device for detecting a relay in a nuclear power plant power system provided by the present invention. Detailed implementation manners

[0055] The following description is essentially exemplary only and is not intended to limit the present disclosure, its application, and uses. It should be understood that in all these drawings, the same or similar reference numerals indicate the same or similar parts and features. Each drawing only schematically shows the concept and principle of the embodiments of the present disclosure, and does not necessarily show the specific dimensions and their ratios of the embodiments of the present disclosure. In a specific part of a specific drawing, the relevant details or structures of the embodiments of the present disclosure may be illustrated in an exaggerated manner.

[0056] Embodiment 1

[0057] This embodiment provides a technical solution: as Figure 1 , Figure 2 shown: A method for detecting a relay in a nuclear power plant power system, and the detection steps are as follows:

[0058] Collect the operation data of the relay to be detected;

[0059] Analyze the operation data to generate a periodic change index of the relay;

[0060] Based on the periodic change index of the relay to be detected, evaluate the state of the relay, and generate different warning instructions based on the evaluation results.

[0061] This embodiment provides a method for detecting a relay in a nuclear power plant power system. Specifically, the operation data includes state data and performance data, where the state data includes temperature data and key part image data of the relay, and the performance data includes the on and off response times of the relay.

[0062] This embodiment provides a method for detecting relays in a nuclear power plant power system. Specifically, the method for analyzing operation data to generate the periodic change index of the relay is as follows:

[0063] Set the acquisition period. Within one acquisition period, the preset time interval for collecting status data is , then the temperatures of the collected relays are sequentially recorded as: , and the images of the key parts of the collected relays are sequentially recorded as: , where is the temperature of the relay collected for the th time, is the image of the key part of the relay collected for the

[0064] Based on the temperature and the image of the key part of the relay, calculate and generate the temperature change coefficient and the image change coefficient of the relay;

[0065] Based on the energization and de-energization response times of the relay, calculate and generate the performance change coefficient of the relay;

[0066] Based on the temperature change coefficient, the image change coefficient, and the performance change coefficient of the relay, generate the periodic change index of the relay within one acquisition period.

[0067] This embodiment provides a method for detecting relays in a nuclear power plant power system. Specifically, the method for generating the temperature change coefficient of the relay is as follows:

[0068] Extract the temperature change value of the relay in each time interval within one acquisition period, denoted as , then the average temperature change coefficient of the relay within this acquisition period is:

[0069] ;

[0070] where is the average temperature change coefficient of the relay within one acquisition period, is the temperature change value of the relay collected for the th time minus the temperature change value of the relay collected for the th time within one acquisition period, is the maximum temperature change value of the relay collected within one acquisition period, is the minimum temperature change value of the relay collected within one acquisition period, is the number of acquisitions.

[0071] This embodiment provides a method for detecting relays in a nuclear power plant power system. Specifically, the method for generating the image change coefficient of the relay is as follows:

[0072] Extract the captured images of the key parts of the relay within one capture period and the original images of the key parts of the relay ;

[0073] Compare the captured images with the original images respectively and calculate the difference degree of the images when there are differences between the two;

[0074] Generate the image change coefficient of the relay within this capture period based on the difference degree of the images .

[0075] This embodiment provides a method for detecting relays in a nuclear power plant power system. Specifically, the method for calculating the difference degree of the images is as follows:

[0076] Fuse and analyze the captured images with the original images respectively to extract the difference factors in the captured images. Among them, the difference factor is the difference parameter between the captured image and the original image, and the difference parameter includes the number of different parts and the area of the different parts between the captured image and the original image;

[0077] Generate the difference degree of the captured image based on the difference factors of the captured image, specifically as follows;

[0078] ;

[0079] wherein, is the difference degree of the captured image, is the number of different parts between the captured image and the original image, is the area of the th different part between the captured image and the original image.

[0080] This embodiment provides a method for detecting relays in a nuclear power plant power system. Specifically, the method for generating the image change coefficient of the relay based on the difference degree of the images is as follows:

[0081] ;

[0082] wherein, is the image change coefficient of the relay within one capture period, is the difference degree of the th captured image within one capture period, is the difference between the difference degrees of the th and th captured images within one capture period, is the number of acquisitions within one acquisition period, , takes an integer value greater than 1.

[0083] This embodiment provides a method for detecting relays in a nuclear power plant power system. Specifically, based on the energization and de-energization response times of the relay, the method for generating the performance change coefficient of the relay is as follows:

[0084] Extract the energization and de-energization response times of the initial relay, denoted as and respectively. After one acquisition period, the energization and de-energization response times of the relay are denoted as and respectively. Then the performance change coefficient of the relay is:

[0085] ;

[0086] where is the performance change coefficient of the relay within one acquisition period.

[0087] This embodiment provides a method for detecting relays in a nuclear power plant power system. Specifically, the method for generating the periodic change index of the relay is as follows:

[0088] ;

[0089] where is the periodic change index of the relay within one acquisition period, is the average temperature change coefficient of the relay within one acquisition period, is the image change coefficient of the relay within one acquisition period, is the performance change coefficient of the relay within one acquisition period, is the weight factor, are all greater than 0. In the formula, the weight factor is obtained by those skilled in the art collecting multiple sets of comprehensive parameters, setting corresponding weight factors for each set of comprehensive parameters, substituting the set weight factors and the collected comprehensive parameters into the formula, any three formulas form a system of linear equations with three variables, screening and taking the average value of the calculated weight factors to obtain the average value of. Optionally, = 1, is 0.52, is 0.30, is 0.18.

[0090] This embodiment provides a method for detecting relays in a nuclear power plant power system. Specifically, based on the periodic change index of the relay to be detected, the state of the relay is evaluated, and based on the evaluation result, the method for generating different warning instructions is as follows:

[0091] The periodic change index threshold of the preset relay is , where , the periodic change index threshold of the preset relay is the basis for dividing the relay state. The setting of the periodic change index threshold of the relay is set by collecting the state data information of multiple groups of different relays in historical situations and combining the safety performance of the relay. The periodic change index of the relay can directly reflect the current safety of the relay;

[0092] If , then the relay is evaluated to be in a normal state and no warning instruction is generated;

[0093] If , then the relay is evaluated to be in a preliminary abnormal state and a first warning instruction is generated;

[0094] If , then the relay is evaluated to be in a serious abnormal state and a second warning instruction is generated. Among them, the warning levels of the first warning instruction and the second warning instruction gradually increase. Specifically, the first warning instruction is to issue an alarm, and the second warning instruction is to disconnect the relay and issue an alarm at the same time.

[0095] In summary, the detection method in this embodiment can regularly collect data of the relay in the power system, thereby extracting various data information of the relay, including the state data and performance data of the relay, and based on the collected state data and performance data of the relay, periodically analyze the state and state changes of the relay, so as to more accurately understand the operation of the relay. On the one hand, it can provide data support for the subsequent improvement of the relay, and on the other hand, it can accurately grasp the changes of the relay, so as to perform timely maintenance when the relay is abnormal.

[0096] Embodiment 2

[0097] In order to implement the relay detection method for the nuclear power plant power system, this embodiment provides a relay detection device for the nuclear power plant power system: As Figure 3As shown in the figure, it includes a collection module, a processing module, and an evaluation and warning module. Among them, the collection module is configured to collect the operation data of the relay to be detected. The operation data includes status data and performance data. The status data includes the temperature data and key part image data of the relay. Among them, the temperature data can be collected through a temperature sensor, and the key part image data can be collected by installing a high-definition camera to take pictures of the key parts of the relay. The performance data includes the power-on and power-off response times of the relay. The processing module is configured to analyze and process the collected operation data of the relay to obtain the periodic change index of the relay within one collection cycle. The evaluation and warning module is configured to evaluate the status of the relay according to the periodic change index of the relay and generate different warning instructions based on the evaluation results.

[0098] In the above text, the exemplary embodiments of the solutions proposed by the present disclosure are described in detail with reference to the preferred embodiments. However, those skilled in the art can understand that, without departing from the concept of the present disclosure, various modifications and variations can be made to the above specific embodiments, and various combinations of the technical features and structures proposed by the present disclosure can be made without exceeding the protection scope of the present disclosure. The protection scope of the present disclosure is determined by the appended claims.

Claims

1. A method for detecting relays in a nuclear power plant electrical system, characterized in that, The specific detection steps are as follows: Collect the operation data of the relay to be detected, where the operation data includes status data and performance data. The status data includes the temperature data and key part image data of the relay, and the performance data includes the on and off response times of the relay; Analyze the operation data to generate the periodic change index of the relay; Based on the periodic change index of the relay to be detected, conduct a status assessment of the relay, and generate different warning instructions based on the assessment results; Among them, the method for analyzing the operation data to generate the periodic change index of the relay is as follows: Set the acquisition period. During one acquisition period, the preset time interval for collecting status data is , then the temperatures of the collected relays are recorded in sequence as: , and the images of the key parts of the collected relays are recorded in sequence as: , where is the temperature of the relay collected at the -th time, and is the image of the key part of the relay collected at the -th time; Based on the temperature and key part image of the relay, calculate and generate the temperature change coefficient and image change coefficient of the relay; Based on the on and off response times of the relay, calculate and generate the performance change coefficient of the relay; Based on the temperature change coefficient, image change coefficient and performance change coefficient of the relay, generate the periodic change index of the relay within one acquisition period.

2. The relay detection method for a nuclear power plant power system according to claim 1, wherein The method for generating the temperature change coefficient of the relay is as follows: Extract the temperature change value of the relay in each time interval within one acquisition period, denoted as , then the average temperature change coefficient of the relay within this acquisition period is: ； Among them, is the average temperature change coefficient of the relay within a collection period, is the temperature change value of the relay collected for the th and the th time within a collection period, is the maximum temperature change value of the relay collected within a collection period, is the minimum temperature change value of the relay collected within a collection period, is the number of collections.

3. A method for detecting a relay in a nuclear power plant power system according to claim 1, characterized in that, The method for generating the image change coefficient of the relay is as follows: Extract the captured images of the key parts of the relay within one acquisition cycle and the original images of the key parts of the relay ; The acquired image is compared with the original image respectively. When there are differences between the two, calculate the difference degree of the image ; Based on the image the image change coefficient of the relay in this acquisition period is generated according to the difference degree.

4. A method for detecting a relay in a nuclear power plant power system according to claim 3, characterized in that, Calculating an image The method for calculating the difference degree is as follows: The acquired image is respectively fused and analyzed with the original image to extract the difference factors in the acquired image, where the difference factors are the difference parameters between the acquired image and the original image, and the difference parameters include the number of different parts and the area of different parts between the acquired image and the original image; Based on the difference factor of the collected images, generate the difference degree of the collected images, specifically as follows; ; Among them, is the difference degree of the acquired image, is the number of different parts between the acquired image and the original image, is the area of the -th different part between the acquired image and the original image.

5. A method for detecting a relay in a nuclear power plant power system according to claim 1, characterized in that, Based on the image The method for generating the image change coefficient of the relay based on the difference degree is as follows: ； Among them, is the image change coefficient of the relay within one acquisition period, is the difference degree of the th acquisition image within one acquisition period, is the difference degree difference between the th and the th acquisition images within one acquisition period, is the number of acquisitions within one acquisition period, , takes values as integers greater than 1.

6. A method for detecting a relay in a nuclear power plant power system according to claim 1, characterized in that, The method for generating the performance change coefficient of the relay based on the on and off response times of the relay is as follows: Extract the energization and de-energization response times of the initial relay, denoted as and , and the energization and de-energization response times of the relay after one acquisition cycle, denoted as and , then the performance change coefficient of the relay is:[[]] ； Among them, is the performance change coefficient of the relay within one acquisition period.

7. A method for detecting a relay in a nuclear power plant power system according to claim 1, characterized in that, The method for generating the periodic change index of the relay is as follows: ； Among them, is the periodic change index of the relay within one acquisition period, is the average temperature change coefficient of the relay within one acquisition period, is the image change coefficient of the relay within one acquisition period, is the performance change coefficient of the relay within one acquisition period, is the weight factor, All are greater than 0.

8. A method for detecting a relay in a nuclear power plant power system according to claim 7, characterized in that, The method for conducting a status assessment of the relay based on the periodic change index of the relay to be detected and generating different warning instructions based on the assessment results is as follows: The periodic change index threshold of the preset relay is , where ; If , the evaluation relay is in a normal state and no warning command is generated; If , the evaluation relay is in a preliminary abnormal state, and a first warning instruction is generated; If , the evaluation relay is in a serious abnormal state, and a second warning instruction is generated. Among them, the warning levels of the first warning instruction and the second warning instruction gradually increase.

9. A relay detection device for a nuclear power plant power system, characterized in that, It is applied to a method for detecting a relay in a nuclear power plant power system as described in any one of claims 1-8, which includes: An acquisition module configured to collect the operation data of the relay to be detected, where the operation data includes status data and performance data. The status data includes the temperature data and key part image data of the relay, and the performance data includes the on and off response times of the relay; A processing module configured to analyze and process the collected operation data of the relay to obtain the periodic change index of the relay within one acquisition period; An evaluation and warning module configured to conduct a status assessment of the relay according to the periodic change index of the relay and generate different warning instructions based on the assessment results.

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