System and method for measuring insulation resistance of coil of rod position detector

Abstract

The invention provides a rod position detector coil insulation resistance measuring system and method. The rod position detector coil insulation resistance measuring system comprises a control unit, a wire core circuit gating unit, a measuring unit and a display unit, wherein the wire core circuit gating unit, the measuring unit and the display unit are connected with the control unit. The control unit is used for receiving a plurality of control instructions input by a user and converting the control instructions into control signals. And the wire core circuit gating unit is used for gating the tested coil from the plurality of coils according to a control signal of the control unit to the wire core circuit gating unit. The measuring unit is connected with the wire core circuit gating unit, and the measuring unit is used for switching a measuring mode according to a control signal of the control unit to the measuring unit, acquiring the electrical characteristics of the tested coil and controlling the coil insulation resistance testing circuit of the tested coil. By using the wire core circuit gating unit and the measuring unit, the problems of low test efficiency, low manual test consistency, complicated data recording and the like in the traditional rod position detector coil insulation resistance measurement are solved.

Description

Technical Field

[0001] The present application belongs to the technical field of nuclear power rod position systems, and specifically relates to a rod position detector coil insulation resistance measurement system and method. Background Art

[0002] The rod position detector is a special device used to monitor the position of the core control rods in pressurized water reactor nuclear power plants. It uses the principle of electromagnetic induction to measure the position of the core control rods through the non-contact principle, and plays a very important role in the operation of nuclear power.

[0003] During the overhaul of a nuclear power plant, it is necessary to measure the insulation resistance of the rod position detector to check whether the characteristics of the measurement detector meet the requirements after one operation cycle and to ensure the performance reliability of the rod position detector. The rod position detector contains 7 groups of coils, and each unit has several rod position detectors. During the maintenance work, personnel need to use handheld multimeters and megohmmeters to check the resistance and insulation of all coils item by item. The amount of data that needs to be manually recorded exceeds 400 items, which occupies a large amount of human resources on the work site and has unsatisfactory speed.

[0004] Due to the special use scenario and small application scope, there are few dedicated test devices for this system in China, and the technical routes used are different, which are not completely suitable for the measurement of M310 units. Therefore, the resistance and insulation of the rod position detector coil are the key factors affecting the reliability of the rod position display system detector. Summary of the invention

[0005] In view of this, the embodiments of the present application are committed to providing a rod position detector coil insulation resistance measurement system and method, which combines the low-voltage circuit of the cable conductivity test with the high-voltage circuit of the insulation resistance test by utilizing the core circuit selection unit and the measurement unit, so as to solve the problems of low test efficiency, low consistency of manual testing and complicated data recording in the traditional rod position detector coil insulation resistance measurement.

[0006] The first aspect of the present application provides a rod position detector coil insulation resistance measurement system, which includes a control unit and a core circuit gating unit, a measuring unit and a display unit all connected to the control unit. The control unit includes a receiving module and a conversion module. The receiving module is used to receive multiple control instructions input by a user. The conversion module is used to convert multiple control instructions into control signals for the core circuit gating unit, the measuring unit and the display unit respectively. The core circuit gating unit is connected between the coil under test and the control unit, and is used to select the coil under test from multiple coils according to the control signal of the control unit to the core circuit gating unit. The measuring unit is connected to the core circuit gating unit, and the measuring unit includes a multimeter for cable conduction test and an insulation meter for insulation resistance test. The measuring unit is used to switch the measurement mode according to the control signal of the control unit to the measuring unit, obtain the electrical characteristics of the coil under test through the core circuit gating unit, and control the coil insulation resistance test circuit of the coil under test. The display unit is used to display the data collected by the measuring unit.

[0007] In a specific embodiment of the present application, the control unit also includes a monitoring module, and the monitoring module is used to monitor the operating status of the rod position detector coil insulation resistance measurement system in real time.

[0008] In a specific embodiment of the present application, the control unit includes a data analysis module. The data analysis module is used to perform statistical analysis on the historical data and then send the data to the display unit for display.

[0009] In a specific implementation of the present application, the measurement unit is further provided with a test environment identification module, which is used to automatically identify the test environment and adjust the measurement parameters according to changes in the test environment.

[0010] In a specific embodiment of the present application, the core circuit selection unit uses a high-voltage relay matrix. Through different conduction combinations of the relay matrix, each core port of the multi-core cable corresponding to multiple coils is automatically and accurately connected to the measurement circuit to complete the measurement of each core of the multi-core cable.

[0011] In a specific embodiment of the present application, the core circuit gating unit is further provided with a high voltage discharge circuit, and the high voltage discharge circuit is connected to the negative pole of the insulation meter.

[0012] The second aspect of the present application provides a rod position detector coil insulation resistance measurement system method, which includes: using the control unit in the rod position detector coil insulation resistance measurement system provided by the first aspect of the present application to receive multiple control instructions input by the user, and converting the multiple control instructions into control signals for the core circuit gating unit, the measuring unit and the display unit respectively; using the core circuit gating unit in the rod position detector coil insulation resistance measurement system provided by the first aspect of the present application, gating the coil to be measured from multiple coils according to the control signal of the control unit to the core circuit gating unit; using the measuring unit in the rod position detector coil insulation resistance measurement system of the embodiment of the present application, switching the measurement mode according to the control signal of the control unit to the measuring unit, obtaining the electrical characteristics of the coil to be measured through the core circuit gating unit, and controlling the coil insulation resistance test circuit of the coil to be measured; using the display unit in the rod position detector coil insulation resistance measurement system of the embodiment of the present application, displaying the data collected by the measuring unit.

[0013] The beneficial effect of the technical solution of the present application is that: by using the core circuit gating unit to connect the coil under test with the control unit, the core circuit gating unit accurately selects the coil under test from multiple coils according to the control instructions of the control unit, ensuring that the measuring unit can accurately obtain the electrical characteristics of the coil under test. In addition, by setting a display unit, the data collected by the measuring unit is displayed intuitively and clearly by the display unit, which is convenient for users to understand the insulation resistance of the rod position detector, and during the maintenance process, users can understand the working status of the system through the display unit, and promptly discover and solve problems. In addition, by setting a control unit as the core of the rod position detector coil insulation resistance measurement system, the control unit is responsible for coordinating the work of the core circuit gating unit, the measuring unit and the display unit, and the automatic measurement of the insulation resistance of the rod position detector coil is realized, which improves the test efficiency and test reliability, and also reduces the amount of manually recorded data. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Shown is a block diagram of a rod position detector coil insulation resistance measurement system provided in one embodiment of the present application.

[0015] Figure 2 Shown is a block diagram of a rod position detector coil insulation resistance measurement system provided by another embodiment of the present application.

[0016] Figure 3 Shown is a circuit diagram of a core circuit gating unit in a rod position detector coil insulation resistance measurement system provided in one embodiment of the present application. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] At least one embodiment of the present application provides a rod position detector coil insulation resistance measurement system, which is mainly suitable for M310 reactor type and similar reactor types.

[0019] refer to Figure 1 and Figure 2 The rod position detector coil insulation resistance measurement system includes a control unit and a core circuit gating unit, a measuring unit and a display unit all connected to the control unit. The control unit includes a receiving module and a conversion module. The receiving module is used to receive multiple control instructions input by the user. The conversion module is used to convert the multiple control instructions into control signals for the core circuit gating unit, the measuring unit and the display unit respectively. The core circuit gating unit is connected between the coil to be measured and the control unit, and is used to select the coil to be measured from multiple coils according to the control signal of the control unit to the core circuit gating unit. The measuring unit is connected to the core circuit gating unit, and the measuring unit includes a multimeter for cable conduction test and an insulation meter for insulation resistance test. The measuring unit is used to switch the measurement mode according to the control signal of the control unit to the measuring unit, obtain the electrical characteristics of the coil to be measured through the core circuit gating unit, and control the coil insulation resistance test circuit of the coil to be measured. The display unit is used to display the data collected by the measuring unit.

[0020] It should be noted that the display unit is the window for the rod position detector coil insulation resistance measurement system to interact with the user. The measurement unit is the core part of the rod position detector coil insulation resistance measurement system, responsible for receiving the control signal of the control unit to the measurement unit, and switching the measurement mode according to the control signal of the control unit to the measurement unit. The measurement mode includes a cable continuity test mode and an insulation resistance test mode. When measuring the resistance and insulation of the internal coil of the rod position detector, the measurement unit will be connected to the corresponding test circuit (that is, connected to a multimeter or insulation meter) and collect data in real time. During the measurement process, the measurement unit will control the coil insulation resistance test circuit according to the control signal of the control unit to the measurement unit to ensure the accuracy and reliability of the measurement.

[0021] For example, the control unit may be Figure 2 The display unit can be Figure 2 The core circuit selection unit can be Figure 2 The measurement unit can be Figure 2 Multimeter and insulation meter in.

[0022] According to the technical solution provided in the embodiment of the present application, by using the core circuit gating unit to connect the coil under test with the control unit, the core circuit gating unit accurately selects the coil under test from multiple coils according to the control instruction of the control unit, thereby ensuring that the measuring unit can accurately obtain the electrical characteristics of the coil under test. In addition, by setting a display unit, the data collected by the measuring unit is displayed intuitively and clearly by the display unit, so that the user can understand the insulation resistance of the rod position detector, and during the maintenance process, the user can understand the working status of the system through the display unit, and promptly discover and solve problems. In addition, by setting a control unit as the core of the rod position detector coil insulation resistance measurement system, the control unit is responsible for coordinating the work of the core circuit gating unit, the measuring unit and the display unit, thereby realizing the automatic measurement of the insulation resistance of the rod position detector coil, improving the test efficiency and test reliability, and reducing the amount of manually recorded data.

[0023] In terms of improving test efficiency, traditional test methods often require frequent replacement of test tools and adjustment of test parameters, which is time-consuming and inefficient. In the rod position detector coil insulation resistance measurement system provided in the embodiment of the present application, the measurement unit uses the core circuit gating unit to combine the low-voltage circuit of the cable conduction test with the high-voltage circuit of the insulation resistance test, so that the two tests of the coil's own resistance and the insulation between coils can be completed with one system, thereby greatly improving the consistency and efficiency of the test process.

[0024] In terms of improving test reliability, the rod position detector coil insulation resistance measurement system provided in the embodiment of the present application effectively improves the reliability of manual testing by reducing the links of manual operation. In traditional testing methods, manual operation easily introduces errors and inconsistencies, affecting the accuracy of test results. However, by using the rod position detector coil insulation resistance measurement system provided in the embodiment of the present application for testing, it is possible to accurately control the test conditions, reduce the interference of human factors, ensure the accuracy and repeatability of each test, and thus significantly improve the reliability of the test.

[0025] In terms of reducing the amount of manually recorded data, in the traditional measurement process, testers need to manually record a large amount of test data, which is not only time-consuming and labor-intensive, but also prone to errors. By using the rod position detector coil insulation resistance measurement system provided by the embodiment of the present application for testing, the test data can be automatically collected, stored and analyzed, which greatly simplifies the data recording process, reduces the error rate, and also facilitates subsequent data analysis and processing.

[0026] In at least one embodiment of the present application, the control unit further includes a monitoring module, which is used to monitor the operating status of the rod position detector coil insulation resistance measurement system in real time. In this way, in a complex working environment, the control unit can ensure the efficient and stable operation of the system, ensure the accuracy and safety of the measurement, and provide a strong guarantee for the insulation resistance test of the rod position detector.

[0027] In at least one embodiment of the present application, the measurement unit is further provided with a test environment identification module. The test environment identification module is used to automatically identify the test environment, and the measurement unit is also used to adjust the measurement parameters according to the changes in the test environment. In this way, the measurement unit has a high level of automation and intelligence, can automatically identify the test environment, optimize the measurement parameters, and improve the measurement efficiency.

[0028] For example, one or more of the multimeter and the insulation meter may be provided with a module for identifying the test environment.

[0029] In at least one embodiment of the present application, the control unit includes a data analysis module. The data analysis module is used to perform statistical analysis on the historical data and then send it to the display unit for display. In this way, by setting the control unit with a powerful data analysis function, it is possible to perform statistical analysis on the historical data and display it on the display unit, providing valuable reference information for users.

[0030] It should be noted that the display unit can adopt advanced display technology, can update data in real time, and present the results in various forms such as charts and curves.

[0031] In at least one embodiment of the present application, reference Figure 3 The core circuit selection unit uses a high-voltage relay matrix. Through different conduction combinations of the relay matrix, each core port of the multi-core cable corresponding to multiple coils is automatically and accurately connected to the measurement circuit to complete the measurement of each core of the multi-core cable. In this way, by using separate relays for different coils (such as 14 relays from SW1 to SW14), through the high-voltage line design, the drive circuit is effectively isolated from other circuits by using relays, ensuring the safety and stability of the rod position detector coil insulation resistance measurement system.

[0032] It should be noted that the negative pole of the multimeter may be further provided with a relay SW15, and the positive pole of the insulating meter may be further provided with a relay SW16.

[0033] In at least one embodiment of the present application, the core circuit gating unit is further provided with a high voltage discharge circuit, and the high voltage discharge circuit is connected to the negative pole of the insulation meter. Thus, by adding the high voltage discharge circuit design, it is prevented that the residual high voltage will break through the measurement card and cause damage to the field equipment.

[0034] For example, refer to Figure 3 , the corresponding circuit of relay SW14 is the high voltage discharge circuit.

[0035] Specifically, refer to Figure 2 The measuring unit includes an insulation meter and a multimeter. During the measurement, the insulation meter will send out a 500V DC voltage to check the insulation resistance of the core. The load downstream of the core is an inductive load. After the insulation measurement is completed, if the core is not discharged to the ground, the remaining high voltage will break through the measurement card and cause damage to the on-site equipment. After the insulation measurement is completed, the discharge circuit will receive instructions from the control board and automatically discharge the core that has completed the insulation measurement to the ground to ensure the safety of the equipment and avoid the damage to the measuring device caused by the remaining high voltage after the core is reinstalled. It can quickly and accurately switch the connection status of different coils to realize automatic testing of each core of the multi-core cable.

[0036] At least one embodiment of the present application provides a method for measuring the insulation resistance of a rod position detector coil, and the method for measuring the insulation resistance of a rod position detector coil includes the following steps.

[0037] S1: Using the control unit in the rod position detector coil insulation resistance measurement system of the embodiment of the present application, multiple control instructions input by the user are received, and the multiple control instructions are converted into control signals for the wire core circuit selection unit, the measurement unit and the display unit respectively.

[0038] S2: Using the core circuit gating unit in the rod position detector coil insulation resistance measurement system of the embodiment of the present application, the coil to be measured is selected from multiple coils according to the control signal of the control unit to the core circuit gating unit.

[0039] S3: Utilize the measuring unit in the rod position detector coil insulation resistance measurement system of the embodiment of the present application, switch the measurement mode according to the control signal of the control unit to the measuring unit, obtain the electrical characteristics of the coil under test through the core circuit selection unit, and control the coil insulation resistance test circuit of the coil under test.

[0040] S4: Using the display unit in the rod position detector coil insulation resistance measurement system of the embodiment of the present application, the data collected by the measurement unit is displayed.

[0041] The rod position detector coil insulation resistance measurement method is tested using the rod position detector coil insulation resistance measurement system in the above-mentioned embodiment of the present application, and includes the corresponding technical features of the rod position detector coil insulation resistance measurement system in the above-mentioned embodiment of the present application, and can achieve the corresponding technical effects, which will not be repeated here.

[0042] It should be noted that the combination of the various technical features in the embodiments of the present application is not limited to the combination described in the embodiments of the present application or the combination described in the specific embodiments, and all technical features described in the present application can be freely combined or combined in any way unless there is a contradiction between them.

[0043] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the term "comprising" only indicates that the steps and elements that have been clearly identified are included, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0044] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A rod position detector coil insulation resistance measurement system, characterized in that: It includes a control unit, a core circuit gating unit, a measuring unit and a display unit which are all connected to the control unit. The control unit includes a receiving module and a conversion module, the receiving module is used to receive multiple control instructions input by the user, and the conversion module is used to convert the multiple control instructions into control signals for the line core circuit selection unit, the measuring unit and the display unit respectively; The core circuit gating unit is connected between the coil under test and the control unit, and is used to select the coil under test from multiple coils according to the control signal of the control unit to the core circuit gating unit; The measuring unit is connected to the core circuit gating unit, and the measuring unit includes a multimeter for cable continuity test and an insulation meter for insulation resistance test. The measuring unit is used to switch the measuring mode according to the control signal of the control unit to the measuring unit, obtain the electrical characteristics of the coil under test through the core circuit gating unit, and control the coil insulation resistance test circuit of the coil under test; The display unit is used to display the data collected by the measurement unit.

2. The rod position detector coil insulation resistance measurement system according to claim 1 is characterized in that: The control unit also includes a monitoring module, which is used to monitor the operating status of the rod position detector coil insulation resistance measurement system in real time.

3. The rod position detector coil insulation resistance measurement system according to claim 1, characterized in that: The control unit includes a data analysis module, which is used to perform statistical analysis on the historical data and then send it to the display unit for display.

4. The rod position detector coil insulation resistance measurement system according to claim 1, characterized in that: The measuring unit is also provided with a test environment identification module, which is used to automatically identify the test environment. The measuring unit is also used to adjust the measurement parameters according to the changes in the test environment.

5. The rod position detector coil insulation resistance measurement system according to any one of claims 1 to 4, characterized in that: The core circuit gating unit uses a high-voltage relay matrix. Through different conduction combinations of the high-voltage relay matrix, each core port of the multi-core cable corresponding to multiple coils is automatically and accurately connected to the measurement circuit to complete the measurement of each core of the multi-core cable.

6. The rod position detector coil insulation resistance measurement system according to any one of claims 1 to 4, characterized in that: The core circuit selection unit is also provided with a high voltage discharge circuit, and the high voltage discharge circuit is connected to the negative pole of the insulation meter.

7. A rod position detector coil insulation resistance measurement system method, characterized in that: include: Using the control unit in the rod position detector coil insulation resistance measurement system according to any one of claims 1 to 6, receiving multiple control instructions input by a user, and converting the multiple control instructions into control signals for the core circuit gating unit, the measuring unit and the display unit respectively; Using the core circuit gating unit in the rod position detector coil insulation resistance measurement system, the coil to be measured is selected from multiple coils according to the control signal of the control unit to the core circuit gating unit; Using the measuring unit in the rod position detector coil insulation resistance measurement system, the measuring mode is switched according to the control signal of the control unit to the measuring unit, the electrical characteristics of the measured coil are obtained through the core circuit gating unit, and the coil insulation resistance test circuit of the measured coil is controlled; The display unit in the rod position detector coil insulation resistance measurement system is used to display the data collected by the measurement unit.

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