Nuclear power station electric power system relay detection device and detection method thereof

Abstract

The invention discloses a nuclear power station electric power system relay detection device and a detection method thereof, and relates to the field of relay detection, and the device comprises an acquisition module, a processing module and an evaluation early warning module. According to the invention, data acquisition can be carried out on the relay in a power system regularly, so that data information, including state data and performance data of the relay, of the relay in various aspects can be extracted, and the state and state change of the relay can be analyzed periodically based on the acquired state data and performance data of the relay. In this way, the operation condition of the relay can be known more accurately, on one hand, data support can be provided for subsequent relay improvement, on the other hand, changes of the relay can be accurately mastered so that timely maintenance can be carried out when the relay is abnormal, the relay can be detected more accurately through the method, and the detection efficiency is improved. And a worker can know the state of the relay more thoroughly.

Description

Technical Field

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

[0002] As is known, a relay is an electrical control device, which is widely used in circuits to realize functions such as switching, protection and control. Its basic principle is to use the change of current or voltage to control the opening and closing of the circuit. When the relay is in use, in order to ensure its performance and safety of use, regular inspection of the relay is an indispensable step; For example, the authorization announcement number is CN112858898B, the authorization announcement date is 2023.04.04, and the name is a relay fault detection method, which is applied to an elevator four-quadrant inverter system. The elevator four-quadrant inverter system includes: a power grid, a rectifier, an inverter and a motor electrically connected in sequence, and also includes a three-phase relay, and the three-phase relay is connected between the three-phase end of the power grid and the three-phase AC end of the rectifier; the relay fault detection method includes: controlling the rectifier to run at no load and the inverter not to run; providing a preset reactive current to the rectifier, and obtaining the size of the three-phase instantaneous current in the three-phase relay after a preset time period...; As in the above-mentioned application, in the existing relay detection devices or detection methods, most of them are manually used regularly to use detection tools, and the tools are used to move to the position of the relay to detect various performances of the relay, and then corresponding processing is performed according to the detection results. This detection method has low detection efficiency and cannot accurately understand the status of the relay, affecting the safety of the entire power system. There are also some monitoring structures directly installed on the relay to monitor the relay, but the monitoring effect is general, and during the monitoring, there is a lack of analysis of the changes in the relay, so the early warning effect is limited. Summary of the invention

[0003] 1. Purpose of the invention In view of this, the purpose of the present invention is to propose a nuclear power plant power system relay detection device and a detection method thereof, through which data collection can be performed on the relays in the power system on a regular basis, thereby extracting various aspects of data information of the relays, and based on the collected status data and performance data of the relays, the status and status changes of the relays are periodically analyzed, so that the operation of the relays can be understood more accurately, thereby achieving the effect of improving the safety of the power system.

[0004] (II) Technical solution In order to achieve the above technical objectives, the present invention provides a nuclear power plant power system relay detection device, which includes: A collection module is configured to collect operation data of the relay to be detected, the operation data state data and performance data, the state data includes temperature data and key parts image data of the relay, and the performance data includes power-on and power-off response time of the relay; A processing module is configured to analyze and process the collected operation data of the relay to obtain a periodic change index of the relay within a 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. The present invention also discloses a method for detecting a relay in a power system of a nuclear power plant, and the specific detection steps are as follows: Collect the operating data of the relay to be tested; Analyze the operation data to generate the periodic variation index of the relay; Based on the periodic change index of the relay to be detected, the state of the relay is evaluated, and different early warning instructions are generated based on the evaluation results.

[0005] As a further description of the above technical solution: the operating data includes state data and performance data, wherein the state data includes temperature data and key parts image data of the relay, and the performance data includes power-on and power-off response time of the relay.

[0006] As a further description of the above technical solution: the method of analyzing the operation data and generating the periodic variation index of the relay is as follows: Set the collection cycle. In one collection cycle, the preset status data collection time interval is , then the collected relay temperatures are recorded as: , the collected images of key parts of the relay are recorded as follows: ,in, For the The temperature of the relay collected at the time, for The key parts images of the relay collected this time; Based on the temperature of the relay and the image of key parts, the temperature variation coefficient and image variation coefficient of the relay are calculated and generated; Based on the relay's power-on and power-off response time, the relay's performance variation coefficient is calculated and generated; Based on the temperature variation coefficient, image variation coefficient and performance variation coefficient of the relay, a periodic variation index of the relay within the acquisition period is generated.

[0007] As a further description of the above technical solution: the method for generating the temperature variation coefficient of the relay is as follows: Extract the temperature change value of the relay in each time interval within a collection cycle and record it as , then the average temperature variation coefficient of the relay during the acquisition period is: ; in, is the average temperature variation coefficient of the relay within one acquisition cycle, The first Second and The relay temperature change value collected for each time, is the maximum temperature change value of the relay collected within a collection cycle, is the minimum temperature change value of the relay collected within a collection cycle, is the number of collections.

[0008] As a further description of the above technical solution: the method for generating the image variation coefficient of the relay is as follows: Extract the collected images of the key parts of the relay within a collection cycle And the original image of the key parts of the relay ; The image will be collected Respectively with the original image Compare and calculate the image when there is a difference between the two The difference between Image-based The difference is used to generate the image change coefficient of the relay within the acquisition period.

[0009] As a further description of the above technical solution: Calculate the image The difference method is as follows: The image will be collected Respectively with the original image Perform fusion analysis to extract difference factors in the collected image, wherein the difference factors are difference parameters between the collected image and the original image, and the difference parameters include the number and area of ​​the difference parts between the collected image and the original image; Based on the difference factor of the collected image, the difference degree of the collected image is generated, as follows; ; in, is the difference of the collected images, is the number of differences between the captured image and the original image, To collect the image The area of ​​the part that is different from the original image.

[0010] As a further description of the above technical solution: based on the image The method of generating the image variation coefficient of the relay is as follows: ; in, is the image variation coefficient of the relay within one acquisition cycle, The first The difference between the collected images, The first and The difference value of the acquired images, is the number of acquisitions in one acquisition cycle, , The value of is an integer greater than 1.

[0011] As a further description of the above technical solution: Based on the power-on and power-off response time of the relay, the method for generating the performance variation coefficient of the relay is as follows: Extract the initial relay power-on and power-off response times, recorded as and , the relay power-on and power-off response time after one acquisition cycle are recorded respectively and , then the performance variation coefficient of the relay is: ; in, It is the performance variation coefficient of the relay within one acquisition cycle.

[0012] As a further description of the above technical solution: the method for generating the periodic variation index of the relay is as follows: ; in, is the periodic variation index of the relay within a collection cycle, is the average temperature variation coefficient of the relay within one acquisition cycle, is the image variation coefficient of the relay within one acquisition cycle, is the performance variation coefficient of the relay within one acquisition cycle, is the weight factor, Both are greater than 0.

[0013] As a further description of the above technical solution: 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, a method for generating different early warning instructions is as follows: The preset relay periodic change index threshold is ,in, ; like , then the relay is evaluated to be in normal state and no warning instruction is generated; like , the relay is evaluated to be in a preliminary abnormal state, and a first warning instruction is generated; like , the relay is evaluated to be 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 are gradually increased.

[0014] In the above technical scheme, the present invention provides a nuclear power plant power system relay detection device and a detection method thereof. Through the detection method, data can be regularly collected from the relays in the power system, so as to extract various aspects of data information of the relay, including the status data and performance data of the relay, and based on the collected status data and performance data of the relay, the status and status changes of the relay are periodically analyzed. In this way, the operation of the relay can be understood more accurately. On the one hand, data support can be provided for subsequent relay improvements. On the other hand, the changes of the relay can be accurately grasped, so as to facilitate timely maintenance when the relay is abnormal. Moreover, the detection of the relay by this method is more accurate, so that the staff can have a more thorough understanding of the status of the relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0016] Figure 1 A flowchart of a nuclear power plant power system relay detection method provided by the present invention; Figure 2 A schematic block diagram of relay operation data in a nuclear power plant power system relay detection method provided by the present invention; Figure 3 A schematic structural diagram of a nuclear power plant power system relay detection device provided by the present invention. DETAILED DESCRIPTION

[0017] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, and use. It should be understood that in all of these figures, the same or similar reference numerals indicate the same or similar parts and features. The various drawings only schematically represent the concepts and principles of the embodiments of the present disclosure, and do not necessarily show the specific dimensions and proportions of the various embodiments of the present disclosure. Specific parts in specific drawings may be exaggerated to illustrate the relevant details or structures of the embodiments of the present disclosure.

[0018] Example 1 This embodiment provides a technical solution: Figure 1 , Figure 2 As shown: A method for detecting relays in a nuclear power plant power system, the detection steps are as follows: Collect the operating data of the relay to be tested; Analyze the operation data to generate the periodic variation index of the relay; Based on the periodic change index of the relay to be detected, the state of the relay is evaluated, and different early warning instructions are generated based on the evaluation results.

[0019] This embodiment provides a method for detecting relays in a nuclear power plant power system. Specifically, the operating data includes status data and performance data, wherein the status data includes temperature data of the relay and image data of key parts, and the performance data includes power-on and power-off response time of the relay.

[0020] This embodiment provides a method for detecting relays in a power system of a nuclear power plant. Specifically, the method for analyzing the operation data and generating a periodic variation index of the relay is as follows: Set the collection cycle. In one collection cycle, the preset status data collection time interval is , then the collected relay temperatures are recorded as: , the collected images of key parts of the relay are recorded as follows: ,in, For the The temperature of the relay collected at the time, for The key parts images of the relay collected this time; Based on the temperature of the relay and the image of key parts, the temperature variation coefficient and image variation coefficient of the relay are calculated and generated; Based on the relay's power-on and power-off response time, the relay's performance variation coefficient is calculated and generated; Based on the temperature variation coefficient, image variation coefficient and performance variation coefficient of the relay, a periodic variation index of the relay within the acquisition period is generated.

[0021] This embodiment provides a method for detecting a relay in a power system of a nuclear power plant. Specifically, a method for generating a temperature variation coefficient of a relay is as follows: Extract the temperature change value of the relay in each time interval within a collection cycle and record it as , then the average temperature variation coefficient of the relay during the acquisition period is: ; in, is the average temperature variation coefficient of the relay within one acquisition cycle, The first Second and The relay temperature change value collected for each time, is the maximum temperature change value of the relay collected within a collection cycle, is the minimum temperature change value of the relay collected within a collection cycle, is the number of collections.

[0022] This embodiment provides a method for detecting relays in a nuclear power plant power system. Specifically, the method for generating an image variation coefficient of a relay is as follows: Extract the collected images of the key parts of the relay within a collection cycle And the original image of the key parts of the relay ; The image will be collected Respectively with the original image Compare and calculate the image when there is a difference between the two The difference between Image-based The difference is used to generate the image change coefficient of the relay within the acquisition period.

[0023] This embodiment provides a nuclear power plant power system relay detection method, specifically, calculating image The difference method is as follows: The image will be collected Respectively with the original image Perform fusion analysis to extract difference factors in the collected image, wherein the difference factors are difference parameters between the collected image and the original image, and the difference parameters include the number and area of ​​the difference parts between the collected image and the original image; Based on the difference factor of the collected image, the difference degree of the collected image is generated, as follows; ; in, is the difference of the collected images, is the number of differences between the captured image and the original image, To collect the image The area of ​​the part that is different from the original image.

[0024] This embodiment provides a nuclear power plant power system relay detection method, specifically, based on image The method of generating the image variation coefficient of the relay is as follows: ; in, is the image variation coefficient of the relay within one acquisition cycle, The first The difference between the collected images, The first and The difference value of the acquired images, is the number of acquisitions in one acquisition cycle, , The value of is an integer greater than 1.

[0025] This embodiment provides a method for detecting a relay in a power system of a nuclear power plant. Specifically, a method for generating a performance variation coefficient of a relay based on the power-on and power-off response time of the relay is as follows: Extract the initial relay power-on and power-off response times, recorded as and , the relay power-on and power-off response time after one acquisition cycle are recorded respectively and , then the performance variation coefficient of the relay is: ; in, It is the performance variation coefficient of the relay within one acquisition cycle.

[0026] This embodiment provides a method for detecting a relay in a power system of a nuclear power plant. Specifically, the method for generating a periodic variation index of a relay is as follows: ; in, is the periodic variation index of the relay within a collection cycle, is the average temperature variation coefficient of the relay within one acquisition cycle, is the image variation coefficient of the relay within one acquisition cycle, is the performance variation coefficient of the relay within one acquisition cycle, is the weight factor, All are greater than 0, where the weight factor is obtained by a technician in this field who collects multiple sets of comprehensive parameters and sets corresponding weight factors for each set of comprehensive parameters. The set weight factors and the collected comprehensive parameters are substituted into the formula. Any three formulas constitute a three-variable linear equation system. The calculated weight factors are screened and averaged to obtain The mean of , optionally, =1, is 0.52, is 0.30, is 0.18.

[0027] 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, different early warning instructions are generated as follows: The preset relay periodic change index threshold is ,in, The preset relay periodic change index threshold is the basis for classifying the relay state. The relay periodic change index threshold is set by collecting state data information of multiple groups of different relays in historical situations and combining it with the safety performance of the relay. The relay periodic change index can directly reflect the current safety of the relay; like , then the relay is evaluated to be in normal state and no warning instruction is generated; like , the relay is evaluated to be in a preliminary abnormal state, and a first warning instruction is generated; like , the relay is evaluated to be 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 are gradually increased. 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.

[0028] To sum up, the detection method in this embodiment can regularly collect data on the relays in the power system, so as to extract various aspects of data information of the relay, 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 subsequent relay improvements, and on the other hand, it can accurately grasp the changes in the relay, so as to facilitate timely maintenance when the relay has an abnormality.

[0029] Example 2 In order to implement the nuclear power plant power system relay detection method, this embodiment provides a nuclear power plant power system relay detection device: Figure 3 As shown, it includes an acquisition module, a processing module and an evaluation and early warning module, wherein the acquisition module is configured to acquire the operation data of the relay to be detected, the operation data status data and performance data, the status data including the temperature data and key part image data of the relay, wherein the temperature data can be acquired by a temperature sensor, the key part image data can be acquired by installing a high-definition camera to shoot and acquire the key parts of the relay, the performance data includes the power-on and power-off response time of the relay, the processing module is configured to analyze and process the acquired operation data of the relay, and acquire the periodic change index of the relay within an acquisition cycle, the evaluation and early warning module is configured to evaluate the state of the relay according to the periodic change index of the relay, and generate different early warning instructions based on the evaluation result.

[0030] The exemplary implementation scheme of the present disclosure is described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present disclosure, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present disclosure can be combined in various ways without exceeding the protection scope of the present disclosure, which is determined by the attached claims.

Claims

1. A relay detection device for a nuclear power plant power system, characterized in that: It includes: A collection module is configured to collect operation data of the relay to be detected, the operation data state data and performance data, the state data includes temperature data and key parts image data of the relay, and the performance data includes power-on and power-off response time of the relay; A processing module is configured to analyze and process the collected operation data of the relay to obtain a periodic change index of the relay within a collection cycle; The evaluation and early warning module is configured to evaluate the state of the relay according to the periodic change index of the relay, and generate different early warning instructions based on the evaluation results.

2. A detection method applied to a nuclear power plant power system relay detection device as claimed in claim 1, characterized in that: The specific detection steps are as follows: Collecting operation data of the relay to be tested, the operation data including state data and performance data, the state data including temperature data of the relay and image data of key parts, and the performance data including power-on and power-off response time of the relay; Analyze the operation data to generate the periodic variation index of the relay; Based on the periodic change index of the relay to be detected, the state of the relay is evaluated, and different early warning instructions are generated based on the evaluation results.

3. A nuclear power plant power system relay detection method according to claim 2, characterized in that: The method for analyzing the operating data and generating the periodic variation index of the relay is as follows: Set the collection cycle. In one collection cycle, the preset status data collection time interval is , then the collected relay temperatures are recorded as: , the collected images of key parts of the relay are recorded as follows: ,in, For the The temperature of the relay collected at the time, for The key parts images of the relay collected this time; Based on the temperature of the relay and the image of key parts, the temperature variation coefficient and image variation coefficient of the relay are calculated and generated; Based on the relay's power-on and power-off response time, the relay's performance variation coefficient is calculated and generated; Based on the temperature variation coefficient, image variation coefficient and performance variation coefficient of the relay, a periodic variation index of the relay within the acquisition period is generated.

4. A nuclear power plant power system relay detection method according to claim 3, characterized in that: The method to generate the temperature variation coefficient of the relay is as follows: Extract the temperature change value of the relay in each time interval within a collection cycle and record it as , then the average temperature variation coefficient of the relay during the acquisition period is: ； in, is the average temperature variation coefficient of the relay within one acquisition cycle, The first Second and The relay temperature change value collected for each time, is the maximum temperature change value of the relay collected within a collection cycle, is the minimum temperature change value of the relay collected within a collection cycle, is the number of collections.

5. A nuclear power plant power system relay detection method according to claim 3, characterized in that: The method to generate the image variation coefficient of the relay is as follows: Extract the collected images of the key parts of the relay within a collection cycle And the original image of the key parts of the relay ; The image will be collected Respectively with the original image Compare and calculate the image when there is a difference between the two The difference between Image-based The difference is used to generate the image change coefficient of the relay within the acquisition period.

6. A nuclear power plant power system relay detection method according to claim 5, characterized in that: Computing images The difference method is as follows: The image will be collected Respectively with the original image Perform fusion analysis to extract difference factors in the collected image, wherein the difference factors are difference parameters between the collected image and the original image, and the difference parameters include the number and area of ​​the difference parts between the collected image and the original image; Based on the difference factor of the collected image, the difference degree of the collected image is generated, as follows; ; in, is the difference of the collected images, is the number of differences between the captured image and the original image, To collect the image The area of ​​the difference between the image and the original image.

7. A nuclear power plant power system relay detection method according to claim 3, characterized in that: Image-based The method of generating the image variation coefficient of the relay is as follows: ； in, is the image variation coefficient of the relay within one acquisition cycle, The first The difference between the collected images, The first and The difference value of the acquired images, is the number of acquisitions in one acquisition cycle, , The value of is an integer greater than 1.

8. A nuclear power plant power system relay detection method according to claim 3, characterized in that: The method for generating the performance variation coefficient of the relay based on the energizing and de-energizing response time of the relay is as follows: Extract the initial relay power-on and power-off response times, recorded as and , the relay power-on and power-off response time after one acquisition cycle are recorded respectively and , then the performance variation coefficient of the relay is: ； in, It is the performance variation coefficient of the relay within one acquisition cycle.

9. A nuclear power plant power system relay detection method according to claim 3, characterized in that: The method to generate the periodic variation index of the relay is as follows: ； in, is the periodic variation index of the relay within a collection cycle, is the average temperature variation coefficient of the relay within one acquisition cycle, is the image variation coefficient of the relay within one acquisition cycle, is the performance variation coefficient of the relay within one acquisition cycle, is the weight factor, Both are greater than 0.

10. A nuclear power plant power system relay detection method according to claim 9, characterized in that: 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 of generating different early warning instructions is as follows: The preset relay periodic change index threshold is ,in, ; like , then the relay is evaluated to be in normal state and no warning instruction is generated; like , the relay is evaluated to be in a preliminary abnormal state, and a first warning instruction is generated; like , the relay is evaluated to be 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 are gradually increased.

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