A detection method and system of a line protection switch and a storage medium
By acquiring the device number and matching the test data package, and using self-heating coils, induction cooker coils, intermediate frequency coils, or coils that generate directional magnetic fields for automated testing, the problem of cumbersome testing operations for line protection switchgear is solved, and efficient and safe automated testing is achieved.
Patent Information
- Application Number
- CN202411670673.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2044-11-21
AI Technical Summary
Existing detection methods for line protection switchgear require separate access to the detection circuit, which is cumbersome, time-consuming, and labor-intensive, making it difficult to achieve efficient and safe automated detection.
By acquiring the device number and matching the detection data packet, the system uses self-heating coils, induction cooker coils, intermediate frequency coils, or coils that generate directional magnetic fields for automated detection, simulating abnormal conditions of the protective action components, and combining temperature and trigger time to determine the device status.
It enables automated testing without the need for manual wiring, improving testing efficiency and accuracy, ensuring the safety of testing personnel, reducing energy consumption, and adapting to the testing needs of different equipment models.
Smart Images
Figure CN119716515B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of protection switch testing, and in particular to a testing method, system and storage medium for line protection switches. Background Technology
[0002] Line protection switchgear refers to a type of electrical equipment installed in power lines, primarily used for controlling and protecting power line networks. Line protection switchgear can automatically disconnect the circuit when a fault occurs. It incorporates both thermal and electromagnetic protection mechanisms.
[0003] Thermal protection mechanisms trip by monitoring temperature changes in electrical components. When an overload or short circuit occurs in a circuit, the current increases, causing the electrical components to generate a large amount of heat. If this heat cannot be dissipated in time, the component temperature will rise. When the temperature exceeds the maximum allowable temperature, the thermal relay will automatically trip and cut off the power supply, thus protecting the circuit and equipment from damage. Electromagnetic protection mechanisms trip by monitoring changes in current. In some devices, such as coil relays and AC contactors, when the current in the circuit is too high, the electromagnet generates a strong magnetic field, causing the iron plates on the core to displace, thereby triggering a trip. This mechanism is typically used in applications requiring rapid response, enabling the power supply to be quickly cut off in the event of abnormal current.
[0004] Although line protection switchgear has a protective function, the protective action components need to be inspected before leaving the factory or after long-term use. If the inspection or test fails, the line protection switchgear cannot be used normally. The existing inspection or test method is to connect the line protection switchgear to the test circuit separately. Each test requires a large number of wires to be connected, which is cumbersome, time-consuming and labor-intensive. Summary of the Invention
[0005] In order to enable the testing or inspection of line protection switchgear without requiring a separate connection to the detection circuit, this application provides a testing method, system, and storage medium for line protection switchgear.
[0006] Firstly, this application provides a method for detecting a line protection switch, employing the following technical solution:
[0007] A method for testing a line protection switch includes the following steps:
[0008] Obtain the device number of the device to be tested;
[0009] Based on the device number, a detection data packet corresponding to the device to be detected is matched from a preset database;
[0010] The detection data packet is parsed. The data contained in the detection data packet includes detection type and action data. The detection type is thermal protection detection or electromagnetic protection detection. The action data is the action steps of the detection coil end.
[0011] If the detection type is thermal protection detection, a thermal detection signal is issued; if the detection type is electromagnetic protection detection, an electromagnetic detection signal is issued.
[0012] Based on the thermal detection signal, the end of the detection coil is moved to the side of the protective action component of the device under test or surrounds the protective action component of the device under test. The protective action component is heated by the detection coil until the protective action component activates a circuit breaker. The temperature of the protective action component is detected as the component temperature. If the component temperature is within a preset temperature range and the protective action component activates a circuit breaker, a normal indication is issued for the device under test; otherwise, an abnormal indication is issued for the device under test.
[0013] Based on the electromagnetic detection signal, the end of the detection coil is moved to the side of the protective action component of the device under test. A simulated magnetic field is applied to the protective action component through the detection coil. The duration during which the protective action component does not perform a protective action in the simulated magnetic field is recorded as the trigger time value. If the trigger time value is less than a preset reference time value, a normal indication is issued for the device under test; otherwise, an abnormal indication is issued for the device under test.
[0014] By adopting the above technical solution, the test data package is matched according to the device number, ensuring that the test process is completely compatible with the device under test. The automated and standardized test process reduces manual wiring and tedious operations. It enables quick and accurate determination of the status of the device under test, improving test efficiency. The combination of database and automated testing methods achieves intelligent and automated testing.
[0015] Optionally, based on the thermal detection signal, the end of the detection coil is moved to the side of the protective action component of the device under test:
[0016] The end of the detection coil is a self-heating coil, which heats the protective action component of the device under test through heat conduction.
[0017] The output power of the self-heating coil is adjusted in a positive correlation with the rated power of the protective action component of the device under test; the higher the rated power, the higher the output power; the lower the rated power, the lower the output power.
[0018] By adopting the above technical solutions, the self-heating coil and adjustable heating speed make the heating process faster and more precise, thereby shortening the detection time. Precise control of the heating speed and temperature allows for more accurate simulation of actual fault conditions, leading to a more accurate assessment of the equipment's condition. Adjusting the heating current reduces energy consumption while maintaining detection effectiveness, achieving green detection.
[0019] Optionally, based on the thermal detection signal, the end of the detection coil is moved to the side of the protective action component of the device under test:
[0020] The end of the detection coil is an induction cooker coil, which heats the protective action components of the device to be tested by induction heating.
[0021] The output power of the induction cooker coil is adjusted in a positive correlation with the rated power of the protective action component of the device under test; the higher the rated power, the higher the output power; the lower the rated power, the lower the output power.
[0022] By adopting the above technical solution, since the induction cooker coil operates through induction heating, it does not require additional fuel or medium to generate heat, thereby reducing energy consumption and emissions during the testing process. Simultaneously, because the output power of the induction cooker coil can be precisely adjusted, it can be flexibly modified according to different testing requirements, improving testing efficiency and accuracy.
[0023] Optionally, based on the thermal detection signal, the end of the detection coil is moved to a protective actuating component surrounding the device under test.
[0024] The end of the detection coil is a medium-frequency coil, and the medium-frequency coil surrounds the protective action component;
[0025] The heating power of the intermediate frequency coil is adjusted in a positive correlation with the rated power of the protective action component of the device under test; the higher the rated power, the higher the heating power; the lower the rated power, the lower the heating power.
[0026] By adopting the above technical solution, the accuracy and reliability of the test can be improved because the intermediate frequency coil can uniformly transfer heat to the component under test. Secondly, by adjusting the heating power and heating rate, precise control of the testing process can be achieved, thereby meeting different testing requirements. Finally, this method also has the advantages of high efficiency and environmental friendliness, because intermediate frequency induction heating does not require additional fuel or medium to generate heat, reducing energy consumption and emissions.
[0027] Optionally, based on the electromagnetic detection signal, the end of the detection coil is moved to the side of the protective action component of the device under test:
[0028] The end of the detection coil is a coil that generates a directional magnetic field, which causes the protective action component to activate.
[0029] By adopting the above technical solution, the end of the detection coil is moved to the side of the protective actuator of the device under test, and the magnetic field generated by it is used to trigger or detect the action of the protective actuator. This avoids the risks and inconveniences that may arise from directly operating the protective actuator; it enables the test to be completed quickly and accurately, improving test efficiency; it will not cause damage or injury to equipment or personnel during the test; and it can adapt to the testing needs of protective actuators of different models and specifications.
[0030] Optionally, based on the electromagnetic detection signal, the end of the detection coil is moved to a protective actuating component surrounding the device under test.
[0031] The end of the detection coil is a coil that generates a directional magnetic field, which causes the protective action component to activate.
[0032] By adopting the above technical solution, the end of the detection coil should be designed to completely or partially surround the protective actuator to ensure that the electromagnetic field can act uniformly on the entire component. When the end of the detection coil is energized, it generates a strong electromagnetic field. The intensity and frequency of this electromagnetic field can be adjusted as needed to meet the testing requirements of different protective actuators. Under the influence of the electromagnetic field, the protective actuator will be affected by magnetic force or electromagnetic induction, thereby generating an action. These actions may include engagement, release, and tripping, depending on the type and application of the protective actuator. By observing and analyzing these actions, the performance indicators of the protective actuator, such as response speed, stability, and reliability, can be evaluated.
[0033] Optionally, the step of detecting the temperature of the protective actuating component as the component temperature includes:
[0034] The temperature of the component is obtained by an infrared sensor installed at the protective action component;
[0035] Alternatively, the temperature of the component can be obtained by a temperature sensor located at the protective action component;
[0036] Alternatively, the first temperature can be obtained by an infrared sensor located at the protective action component, and the second temperature can be obtained by a temperature sensor located at the protective action component. The component temperature can be calculated by weighted averaging of the first temperature and the second temperature.
[0037] By adopting the above technical solutions, for scenarios that require rapid temperature measurement and do not require high accuracy, an infrared sensor can be selected; for scenarios that require high-precision temperature measurement and can contact the object being measured, a temperature sensor can be selected; and for scenarios that require comprehensive consideration of multiple factors, a weighted method of infrared temperature measurement and temperature sensor can be selected.
[0038] Optionally, the determination step for the protection action component to generate a circuit breaking action includes:
[0039] Acquire acoustic data at the protective action component;
[0040] The collected acoustic data is matched with a preset acoustic database. If a specific acoustic feature is matched from the acoustic database, it is determined that the protective action component has generated a circuit breaker action.
[0041] Alternatively, infrared or ordinary images of the protective action component can be acquired;
[0042] Analyze the action area of the infrared image or ordinary image, and match the action area of the acquired infrared image or ordinary image with a preset image library. If a specific image feature is matched from the image library, it is determined that the protection action component has generated a circuit breaker action.
[0043] Alternatively, acoustic and image data can be collected from the protective action component.
[0044] The collected acoustic data is matched with a preset acoustic database. If a specific acoustic feature is matched from the acoustic database, it is recorded as the first result.
[0045] Analyze the motion region of the infrared image or ordinary image, match the motion region of the acquired image data with a preset image library, and if a specific image feature is matched from the image library, it is recorded as the second result;
[0046] The first result and the second result are weighted and averaged to obtain a weighted result. If the weighted result is within a preset range, it is determined that the protection action component has generated a circuit breaker action.
[0047] By employing the above technical solutions, and by acquiring acoustic and / or image data from the protective actuator, and performing matching, analysis, and weighted processing, it is possible to accurately determine whether a circuit-breaking action has occurred. The third method combines information from both acoustic and image sources, improving the accuracy and reliability of the judgment.
[0048] Secondly, this application provides a detection system for line protection switches, which adopts the following technical solution:
[0049] A detection system for a line protection switch includes a processor, wherein the processor performs the steps of the detection method for the line protection switch as described in any one of the preceding claims.
[0050] Thirdly, this application provides a storage medium, which adopts the following technical solution:
[0051] A storage medium storing a program that, when executed by a processor, implements the steps of the detection method for the line protection switch described in any one of the preceding claims.
[0052] In summary, this application includes at least one of the following beneficial technical effects:
[0053] By utilizing a pre-set database and automated testing processes, the complexity and error rate of manual operation are reduced, improving testing efficiency and accuracy. It can issue corresponding testing signals based on different testing types (thermal protection testing or electromagnetic protection testing), adapting to the testing needs of different types of protective switches. By precisely controlling the heating of the protective operating components or applying a simulated magnetic field to the testing coil, real working conditions can be simulated, thereby more accurately evaluating the performance of the protective switch. During the testing process, it ensures that testing personnel do not directly contact high-voltage or dangerous components, improving the safety of the testing process.
[0054] By comparing component temperature and trigger time values with preset reference values, it is possible to determine whether the protective switch is working properly, promptly detect potential faults, and reduce the risk of accidents. The testing process can quickly provide test results, providing immediate feedback on whether the results are normal or abnormal, facilitating timely implementation of appropriate measures. Attached Figure Description
[0055] Figure 1 This is a step-by-step diagram of a testing method for a line protection switch.
[0056] Figure 2 This is a diagram of a testing device that uses a self-heating coil.
[0057] Figure 3 This is a diagram of a testing device that uses an induction cooker coil.
[0058] Figure 4 This is a diagram of a detection device that uses an intermediate frequency coil.
[0059] Figure 5 This is a diagram of a detection device using the first coil.
[0060] Figure 6 This is a diagram of a detection device using a second coil.
[0061] Reference numerals in the attached diagram: 1. Telescopic rod; 2. Insulating sleeve; 3. Test power supply; 4. Self-heating coil; 5. Induction cooker coil; 6. Intermediate frequency coil; 7. First coil; 8. Second coil. Detailed Implementation
[0062] The embodiments of this application are described in detail below, and examples of the embodiments are shown in the accompanying drawings.
[0063] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0064] This application discloses a method for detecting a line protection switch, referring to... Figure 1 It includes the following steps:
[0065] Obtain the device number of the device to be tested; the device number can be obtained by manual input.
[0066] The system searches a pre-defined database for a data packet that matches the device number to be tested, based on the device number. The database should contain test data packets for various devices, each associated with a specific device number. Upon successful matching, the test data packet corresponding to the device to be tested will be retrieved.
[0067] The test data packet is parsed, containing the test type and action data. It specifies the test type for the device under test, such as thermal protection test or electromagnetic protection test. It details the action steps at the end of the test coil to guide subsequent test operations.
[0068] If the detection type is thermal protection detection, a thermal detection signal will be issued; this signal will trigger the corresponding thermal protection detection mechanism to detect the thermal protection performance of the equipment.
[0069] Based on thermal detection signals, the end of the detection coil is moved to the side of the protective actuator of the device under test or directly surrounds the protective actuator. The detection coil heats the protective actuator, simulating abnormal conditions such as overload or short circuit that could cause a temperature rise, until the protective actuator trips. The detected temperature of the protective actuator is the component temperature. If the component temperature is within a preset temperature range and the protective actuator trips, a normal indication is issued for the device under test; otherwise, an indication of an abnormality is issued.
[0070] If the detection type is electromagnetic protection detection, an electromagnetic detection signal will be issued; this signal will activate the electromagnetic protection detection process to verify the electromagnetic protection performance of the equipment.
[0071] Based on electromagnetic detection signals, the end of the detection coil is moved to the side of the protective action component of the device under test. A simulated magnetic field is applied to the protective action component through the detection coil to simulate abnormal conditions that may trigger electromagnetic protection, such as current overload or short circuit. The duration during which the protective action component does not take protective action in the simulated magnetic field is recorded as the trigger time value; that is, the time from the start of detection to the moment before the protective action component takes action is the trigger time value. If the trigger time value is less than the preset reference time value, it indicates that the protective action component can respond quickly after receiving the abnormal signal, and a normal indication is issued for the device under test. If the trigger time value is greater than or equal to the preset reference time value, it indicates that the protective action component responds slowly or not at all, and an abnormal indication is issued for the device under test.
[0072] Detailed testing procedures were designed for thermal and electromagnetic protection, respectively. By simulating abnormal conditions and observing the response of protective components, the normality of the equipment is determined. This method effectively detects potential problems with line protection switches, ensuring equipment safety and reliability. Testing data packages are matched according to the equipment number to ensure a complete match between the testing process and the equipment under test. Automated and standardized testing procedures reduce manual wiring and tedious operations. The status of the equipment under test can be quickly and accurately determined, improving testing efficiency. The combination of databases and automated testing methods achieves intelligent and automated testing.
[0073] Based on the thermal detection signal, the end of the detection coil is moved to the side of the protective action component of the device under test:
[0074] Reference Figure 2The detection coil end is a self-heating coil 4. The self-heating coil 4 is moved to the side of the protective action component of the device under test. Good thermal conductivity contact is ensured between the self-heating coil 4 and the protective action component. The self-heating coil 4 heats the protective action component of the device under test through thermal conduction. The self-heating coil 4 generates heat through current and transfers this heat to the protective action component of the device under test through thermal conduction. This process simulates abnormal conditions such as overload or short circuit that the equipment may encounter in actual use, leading to a temperature increase.
[0075] In practical applications, the testing device can be implemented using a telescopic rod 1. One end of the telescopic rod 1 is equipped with an insulating sleeve 2, which is held by a worker wearing protective gear. The other end is fitted with a testing device, which includes a test power supply 3 and a corresponding coil. Figure 2 The coil in question is a self-heating coil 4. During other testing processes, when a different monitoring coil is needed, it can be replaced with the corresponding testing coil, and then the coil can be brought close to the protective action component of the device under test for testing.
[0076] The output power of the self-heating coil 4 is adjusted in a positive correlation with the rated power of the protective action components of the device under test; the higher the rated power, the higher the output power; the lower the rated power, the lower the output power. Rated power is the maximum power the device can withstand during normal operation, reflecting its heat tolerance. If the rated power of the protective action components is high, it means they can withstand higher temperatures without malfunction; therefore, the output power of the self-heating coil 4 can be increased accordingly to more fully simulate a high-temperature environment. Conversely, if the rated power is low, the output power should be reduced to avoid overheating and damage to the device.
[0077] During the heating process, the temperature change of the protective action components and whether a circuit breaking action occurs are continuously monitored.
[0078] If the component temperature is within the preset safe range, which is usually determined according to the equipment's design specifications and safety standards, and the protective action component can promptly trip the circuit after reaching the set temperature, it indicates that the equipment's thermal protection function is normal.
[0079] If the component temperature exceeds the preset range, or if the protective action component fails to trip in time, it indicates that the thermal protection function of the equipment may be abnormal and requires further inspection or repair.
[0080] The self-heating coil 4 and adjustable heating speed make the heating process faster and more precise, thus shortening the testing time. By precisely controlling the heating speed and temperature, actual fault conditions can be simulated more accurately, leading to a more accurate assessment of the condition of the device under test. Adjusting the heating current reduces energy consumption while maintaining testing effectiveness, achieving green testing.
[0081] Based on the thermal detection signal, the end of the detection coil is moved to the side of the protective action component of the device under test:
[0082] Reference Figure 3 The detection coil end is an induction cooker coil 5, which heats the protective action components of the device under test through induction heating. The induction cooker coil 5 is moved to the side of the protective action components of the device under test, ensuring a certain gap between the coil and the component to facilitate induction heating. The induction cooker coil 5 generates a changing magnetic field through alternating current. This magnetic field induces eddy currents in the protective action components (usually metal parts). As these eddy currents flow within the metal parts, they generate heat, thus achieving induction heating.
[0083] The output power of the induction cooker coil 5 is adjusted in a positive correlation with the rated power of the protective action components of the device under test; the higher the rated power, the higher the output power; the lower the rated power, the lower the output power. Rated power is the maximum power the device can withstand during normal operation, reflecting its heat tolerance. If the rated power of the protective action components is high, it means they can withstand higher temperatures without malfunctioning; therefore, the output power of the induction cooker coil 5 can be increased accordingly to more fully simulate a high-temperature environment. Conversely, if the rated power is low, the output power should be reduced to avoid overheating and damage to the device.
[0084] During the heating process, a temperature sensor is used to continuously monitor the temperature changes of the protective action components and record the data.
[0085] At the same time, observe whether the protective action components will break the circuit within the specified time, that is, disconnect the circuit to prevent further damage.
[0086] Based on the monitoring results and preset judgment criteria (such as temperature threshold and action time), determine whether the thermal protection function of the equipment is normal.
[0087] Since the induction cooker coil 5 operates through induction heating, it does not require additional fuel or medium to generate heat, thus reducing energy consumption and emissions during the testing process. Furthermore, because the output power of the induction cooker coil 5 can be precisely adjusted, it can be flexibly modified to meet different testing needs, improving testing efficiency and accuracy.
[0088] Based on the thermal detection signal, the end of the detection coil is moved to the protective action component surrounding the device under test:
[0089] Reference Figure 4The detection coil has an intermediate frequency coil 6 at its end, which surrounds the protective actuator. The intermediate frequency coil 6 is arranged to surround the protective actuator of the device under test, ensuring an appropriate gap between the coil and the actuator to facilitate induction heating while maintaining a safe distance. The intermediate frequency coil 6 generates a changing magnetic field through an intermediate frequency current. This magnetic field induces eddy currents in the protective actuator (usually a metal component). These eddy currents generate heat as they flow within the metal component, thus achieving surround-type induction heating. The coil has a disconnectable reconnection point in the middle, allowing for easy disconnection, re-encirclement of the protective actuator, and reconnection during testing, facilitating the activation of the protective actuator surrounding the device under test.
[0090] The heating power of the intermediate frequency coil 6 is adjusted in a positive correlation with the rated power of the protective action components of the device under test; the higher the rated power, the higher the heating power; the lower the rated power, the lower the heating power. Rated power is the maximum power the device can withstand during normal operation, reflecting its heat tolerance. If the rated power of the protective action components is high, it indicates that it can withstand higher temperatures without malfunctioning. Therefore, the heating power of the intermediate frequency coil 6 can be increased accordingly to more fully simulate a high-temperature environment and test the device's thermal protection performance. Conversely, if the rated power is low, the heating power should be reduced to avoid overheating and damage to the device.
[0091] During the heating process, a temperature sensor is used to continuously monitor the temperature changes of the protective actuators and record the data. Simultaneously, it is observed whether the protective actuators trip within a specified time, thus disconnecting the circuit to prevent further damage.
[0092] Based on the monitoring results and preset judgment criteria (such as temperature threshold and action time), determine whether the thermal protection function of the equipment is normal. If the equipment can promptly trip the circuit after reaching the preset temperature, it indicates that the thermal protection function is normal; if it fails to trip in time or the temperature exceeds the safe range, it indicates that the thermal protection function may be abnormal.
[0093] Because the intermediate frequency coil 6 can uniformly transfer heat to the component under test, the accuracy and reliability of the test can be improved. Secondly, by adjusting the heating power and heating rate, precise control of the testing process can be achieved, thereby meeting different testing requirements. Finally, this method also has advantages such as high efficiency and environmental friendliness, because intermediate frequency induction heating does not require additional fuel or medium to generate heat, reducing energy consumption and emissions.
[0094] Based on the electromagnetic detection signal, the end of the detection coil is moved to the side of the protective action component of the device under test:
[0095] Reference Figure 5Upon receiving the electromagnetic detection signal, the end of the detection coil is moved to the side of the protective actuator of the device under test. Here, the end of the detection coil is a coil that generates a directional magnetic field, designated as the first coil 7. The first coil 7 activates the protective actuator through the generated directional magnetic field. It is crucial to ensure the correct relative position and orientation between the coil and the protective actuator so that the generated directional magnetic field can effectively act on the protective actuator.
[0096] By passing a direct current or alternating current through the coil, a directional magnetic field with a specific direction and intensity is generated. This magnetic field should be sufficient to trigger the electromagnetic response of the protective operating components, such as the closing or opening of relay contacts, or the release of an electromagnetic lock.
[0097] Under the influence of a magnetic field, observe whether the protective actuators operate as expected. This may include the closing and opening of contacts, and the attraction and release of electromagnets. Use sensors or monitoring equipment to record key parameters such as the operating time and force of the protective actuators. These parameters help assess the response speed and reliability of the protective actuators. Based on the monitoring results and preset judgment criteria, determine whether the protective actuators are operating normally. If parameters such as operating time and force meet the specified requirements, and the operation is stable and reliable, it indicates that the electromagnetic performance of the protective actuators is good. If the operation is abnormal, such as delayed operating time, insufficient force, or instability, it may indicate a fault or performance degradation in the protective actuators, requiring further inspection and repair.
[0098] The detection coil is moved to the side of the protective actuator of the device under test, and the magnetic field it generates is used to trigger or detect the action of the protective actuator. This avoids the risks and inconveniences that may arise from directly operating the protective actuator; it can complete the test task quickly and accurately, improving test efficiency; it will not cause damage or injury to equipment or personnel during the test; and it can adapt to the testing needs of different models and specifications of protective actuators.
[0099] Based on the electromagnetic detection signal, the end of the detection coil is moved to the protective action component surrounding the device under test:
[0100] Reference Figure 6Upon receiving an electromagnetic detection signal, the end of the detection coil is moved to surround the protective actuator of the device under test, ensuring that the magnetic field can fully cover and act on the protective actuator. At this point, the end of the detection coil is a coil that generates a directional magnetic field, known as the second coil 8. When the second coil 8 is energized, it generates a magnetic field with a specific direction and intensity; this directional magnetic field triggers the protective actuator. The intensity and direction of the magnetic field are controlled by adjusting the magnitude and direction of the current in the coil. When the magnetic field reaches a certain threshold, it triggers the electromagnetic response of the protective actuator, such as the closing or opening of relay contacts or the release of an electromagnetic lock. The middle of the second coil 8 is a disconnectable / reconnectable point, allowing for easy disconnection, surrounding of the protective actuator, and reconnection during the detection process, facilitating the activation of the protective actuator surrounding the device under test.
[0101] The end of the detection coil should be designed to completely or partially surround the protective actuator to ensure that the electromagnetic field acts uniformly on the entire component. When the end of the detection coil is energized, it generates a strong electromagnetic field. The strength and frequency of this electromagnetic field can be adjusted as needed to meet the testing requirements of different protective actuators. Under the influence of the electromagnetic field, the protective actuator will be affected by magnetic force or electromagnetic induction, thereby producing an action. These actions may include engagement, release, and tripping, depending on the type and application of the protective actuator. By observing and analyzing these actions, the performance indicators of the protective actuator, such as response speed, stability, and reliability, can be evaluated.
[0102] In particular, coils that detect magnetic fields over long periods of time can have an additional insulating layer added to the outside of the conductor.
[0103] There are three ways to detect the temperature of protective operating components:
[0104] The first method involves obtaining the component temperature using an infrared sensor installed at the protective actuation part. The infrared sensor is positioned appropriately within the protective actuation part. This non-contact measurement of the component surface temperature eliminates the need for direct contact, reducing the impact of sensor installation on component operation.
[0105] The second method involves obtaining the component temperature through a temperature sensor located at the protective actuator. This involves placing a temperature sensor, such as a thermocouple, thermistor, or digital temperature sensor, directly inside or on the surface of the protective actuator. This allows for direct measurement of the component's internal temperature, providing more accurate temperature information.
[0106] The third method involves obtaining a first temperature using an infrared sensor located at the protective actuator, and a second temperature using a temperature sensor located at the same actuator. The component temperature is then calculated by weighted averaging of the first and second temperatures. This method combines the advantages of both infrared and temperature sensors, providing more comprehensive and accurate temperature information.
[0107] For scenarios requiring rapid temperature measurement with low accuracy requirements, infrared sensors can be selected; for scenarios requiring high-precision temperature measurement and where it is possible to contact the object being measured, temperature sensors can be selected; and for scenarios that require comprehensive consideration of multiple factors, a weighted method combining infrared temperature measurement and temperature sensors can be selected.
[0108] The methods for determining whether a protective actuator has triggered an open circuit include the following three methods:
[0109] The first method is to judge by sound:
[0110] Use microphones and other devices to collect acoustic data at the protective action parts;
[0111] The collected acoustic data is matched with a preset acoustic database, which should contain the acoustic characteristics of the protective actuators under different states (including circuit breaking). If a specific acoustic characteristic is matched from the acoustic database, it is determined that the protective actuator has performed a circuit breaking action.
[0112] The second method is to determine the result from the image:
[0113] Use an infrared camera or a regular camera to capture infrared or regular images of the protective moving parts; analyze the captured images, paying particular attention to the moving area.
[0114] The system analyzes the action area in infrared or ordinary images and matches it against a pre-defined image library. This library should contain image features of the protective actuators under different states. If a specific image feature is matched from the library, it is determined that the protective actuator has initiated a circuit-breaking action.
[0115] The third method involves judging based on a combination of sound and images:
[0116] Acquire acoustic and image data from the protective actuators.
[0117] The collected sound wave data is matched with a preset sound wave database. If a specific sound wave feature is matched from the sound wave database, it is recorded as the first result. The first result is presented in the form of a score, specifically representing the degree of sound wave matching.
[0118] The motion region of infrared or ordinary images is analyzed, and the motion region of the acquired image data is matched with a preset image library. If a specific image feature is matched from the image library, it is recorded as a second result. The second result is also presented in the form of a score, specifically representing the degree of image matching.
[0119] The first and second results are weighted and averaged to obtain a weighted result. If the weighted result is within a preset range, it is determined that the protection action component has generated a circuit breaker action.
[0120] For example, the first result is assigned a score, say 80, with a higher score indicating a higher match. The second result is also assigned a score, say 70, with a higher score indicating a higher match. The weighted average result is (80 × 0.5) + (70 × 0.5) = 75. If the threshold is set to 74, then since 75 is greater than 74, it can be determined that the protection mechanism has triggered a circuit breaker.
[0121] By acquiring acoustic and / or image data from the protective actuator and performing matching, analysis, and weighting processing, it is possible to accurately determine whether a circuit-breaking action has occurred. The third method combines information from both acoustic and image sources, improving the accuracy and reliability of the judgment.
[0122] This application also discloses a detection system for a line protection switch, including a processor, which executes the steps of the detection method for the line protection switch as described in any of the above embodiments.
[0123] This application also discloses a storage medium storing a program that, when executed by a processor, implements the steps of the detection method for the line protection switch described in any of the above embodiments.
[0124] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.
Claims
1. A method for detecting a line protection switch, characterized in that, Includes the following steps: Obtain the device number of the device to be tested; Based on the device number, a detection data packet corresponding to the device to be detected is matched from a preset database; The detection data packet is parsed. The data contained in the detection data packet includes the detection type and action data. The detection type is thermal protection detection or electromagnetic protection detection. The action data is the action steps of the detection coil end. If the detection type is thermal protection detection, a thermal detection signal is issued; if the detection type is electromagnetic protection detection, an electromagnetic detection signal is issued. Based on the thermal detection signal, the end of the detection coil is moved to the side of the protective action component of the device under test or surrounds the protective action component of the device under test. The protective action component is heated by the detection coil until the protective action component activates a circuit breaker. The temperature of the protective action component is detected as the component temperature. If the component temperature is within a preset temperature range and the protective action component activates a circuit breaker, a normal indication is issued for the device under test; otherwise, an abnormal indication is issued for the device under test. Based on the electromagnetic detection signal, the end of the detection coil is moved to the side of the protective action component of the device under test. A simulated magnetic field is applied to the protective action component through the detection coil. The duration during which the protective action component does not perform a protective action in the simulated magnetic field is recorded as the trigger time value. If the trigger time value is less than a preset reference time value, a normal indication is issued for the device under test; otherwise, an abnormal indication is issued for the device under test. Based on the thermal detection signal, the end of the detection coil is moved to the side of the protective action component of the device under test: The end of the detection coil is a self-heating coil (4), which heats the protective action component of the device under test through heat conduction; The output power of the self-heating coil (4) is adjusted in a positive correlation with the rated power of the protective action component of the device under test; the greater the rated power, the greater the output power. The smaller the rated power, the smaller the output power; Alternatively, based on the thermal detection signal, the end of the detection coil can be moved to the side of the protective action component of the device under test: The end of the detection coil is an induction cooker coil (5), which heats the protective action components of the device to be tested by induction heating. The output power of the induction cooker coil (5) is adjusted in a positive correlation with the rated power of the protective action component of the device under test; the greater the rated power, the greater the output power. The smaller the rated power, the smaller the output power; Alternatively, based on the thermal detection signal, the end of the detection coil can be moved to a protective actuation component surrounding the device under test. The end of the detection coil is a medium frequency coil (6), and the medium frequency coil (6) surrounds the protective action component; The heating power of the intermediate frequency coil (6) is adjusted in a positive correlation with the rated power of the protective action component of the device under test; the greater the rated power, the greater the heating power; the smaller the rated power, the smaller the heating power.
2. The detection method for the line protection switch according to claim 1, characterized in that, Based on the electromagnetic detection signal, the end of the detection coil is moved to the side of the protective action component of the device under test: The end of the detection coil is a coil that generates a directional magnetic field, which causes the protective action component to activate.
3. The detection method for the line protection switch according to claim 1, characterized in that, Based on the electromagnetic detection signal, the end of the detection coil is moved to the protective action component surrounding the device under test: The end of the detection coil is a coil that generates a directional magnetic field, which causes the protective action component to activate.
4. The detection method for the line protection switch according to claim 1, characterized in that, The step of detecting the temperature of the protective action component as the component temperature includes: The temperature of the component is obtained by an infrared sensor installed at the protective action component; Alternatively, the temperature of the component can be obtained by a temperature sensor located at the protective action component; Alternatively, the first temperature can be obtained by an infrared sensor located at the protective action component, and the second temperature can be obtained by a temperature sensor located at the protective action component. The component temperature can be calculated by weighted averaging of the first temperature and the second temperature.
5. The detection method for the line protection switch according to claim 4, characterized in that, The steps for determining whether the protection mechanism has initiated a circuit breaker action include: Acquire acoustic data at the protective action component; The collected acoustic data is matched with a preset acoustic database. If a specific acoustic feature is matched from the acoustic database, it is determined that the protective action component has generated a circuit breaker action. Alternatively, infrared or ordinary images of the protective action component can be acquired; Analyze the action area of the infrared image or ordinary image, and match the action area of the acquired infrared image or ordinary image with a preset image library. If a specific image feature is matched from the image library, it is determined that the protection action component has generated a circuit breaker action. Alternatively, acoustic and image data can be collected from the protective action component. The collected acoustic data is matched with a preset acoustic database. If a specific acoustic feature is matched from the acoustic database, it is recorded as the first result. Analyze the motion region of the infrared image or ordinary image, match the motion region of the acquired image data with a preset image library, and if a specific image feature is matched from the image library, it is recorded as the second result; The first result and the second result are weighted and averaged to obtain a weighted result. If the weighted result is within a preset range, it is determined that the protection action component has generated a circuit breaker action.
6. A detection system for a line protection switch, characterized in that, Includes a processor, wherein the steps of the detection method for the line protection switch as described in any one of claims 1-5 are performed.
7. A storage medium, characterized in that, The medium stores a program that, when executed by a processor, implements the steps of the detection method for the line protection switch according to any one of claims 1-5.
Citation Information
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