Circuit breaker and open circuit protection method

Abstract

The invention provides a circuit breaker and a circuit break protection method, the circuit breaker comprises a data monitoring mechanism, an analysis processing mechanism and an execution mechanism which are mutually connected, the data monitoring mechanism is used for collecting residual current, temperature data and humidity data of equipment; the analysis processing mechanism is used for extracting and analyzing the data acquired by the data detection mechanism to obtain an analysis result of equipment leakage analysis; and the execution mechanism is used for triggering early warning information of electric leakage of the equipment according to the analysis result and executing tripping power-off operation on the equipment. According to the circuit breaker, the accuracy and timeliness of electric leakage adaptive protection can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to a circuit breaker and a circuit breaker protection method. Background Art

[0002] Existing leakage adaptive protection devices mainly adjust the protection gear by the size and duration of the residual current. For example, to adjust the gear down, the residual current must be less than a certain proportion of the current gear value and last for a certain period of time, while to adjust the gear up, the residual current must be greater than a certain proportion and less than another proportion and last for a certain period of time.

[0003] However, this adjustment method relies on fixed thresholds and static judgments, and does not take into account differences in power usage environments and equipment types. Its gear adjustment and protection parameter settings are relatively fixed, and cannot be dynamically optimized according to the actual power usage environment and equipment requirements. It is easy to misjudge short-term current fluctuations as leakage faults. Summary of the invention

[0004] The present application provides a circuit breaker, which can improve the accuracy and timeliness of leakage adaptive protection.

[0005] The present application provides a circuit breaker, comprising a data monitoring mechanism, an analysis and processing mechanism, and an execution mechanism connected to each other, wherein:

[0006] The data monitoring mechanism is used to collect residual current, temperature data and humidity data of the equipment;

[0007] The analysis and processing mechanism is used to extract and analyze the data collected by the data detection mechanism to obtain the analysis result of the equipment leakage analysis;

[0008] The actuator is used to trigger the early warning information of the equipment leakage according to the analysis result, and perform a tripping and power-off operation on the equipment.

[0009] Optionally, the data monitoring mechanism includes:

[0010] An environmental sampling component, used for monitoring temperature data and humidity data of the device;

[0011] A protective current transformer, used for collecting currents of each phase in a three-phase circuit of the device;

[0012] The leakage current transformer is used to detect the residual current in the three-phase circuit.

[0013] Optionally, the environmental sampling component transmits the collected temperature data and humidity data to the analysis and processing mechanism, and the environmental sampling component includes:

[0014] A temperature sampler, used to monitor the ambient temperature of the environment where the device is located in real time to obtain the temperature data;

[0015] The humidity sampler is used to monitor the ambient humidity of the environment where the device is located in real time to obtain the humidity data.

[0016] Optionally, the analysis and processing mechanism includes:

[0017] A collector, used for receiving the temperature data and the humidity data sent by the environmental sampling component, the current signals of each phase sent by the protection current transformer, and the residual current sent by the leakage transformer;

[0018] A processor, used for receiving and processing the collected data of the collector to obtain denoised data;

[0019] A judger, used for receiving and processing the denoised data, and determining a judgment result of whether the device has a leakage;

[0020] An output device is used to receive the judgment result, output a control signal based on the judgment result, and send the control signal to the actuator.

[0021] Optionally, the actuator is connected to the output device, and the actuator includes:

[0022] An early warning device, used to send out an audible and visual alarm signal when the control signal indicates that the device has a leakage fault;

[0023] A release is used to cut off the power supply of the faulty circuit of the device when the control signal indicates that the device has a leakage fault and the duration of the fault is greater than a preset duration.

[0024] Optionally, the processor is further used to obtain a reference current, and correct the residual current based on the reference current to obtain a corrected residual current.

[0025] Optionally, the judger is also used to extract and analyze waveform features of the denoised data, and determine the judgment result through a preset artificial intelligence model in combination with ambient temperature and humidity parameters.

[0026] Optionally, the determiner is further configured to generate a first determination result when the reference current increases;

[0027] When the property of the residual current is a leakage fault current, and the duration of the leakage fault current is greater than the preset duration, a second determination result is generated.

[0028] Optionally, the output device is further used to output a first control signal for controlling the early warning device according to the first judgment result;

[0029] A second control signal for controlling the release is output according to the second judgment result.

[0030] Optionally, the processor is further used to process the residual current signal through a digital filtering algorithm to remove noise and interference signals from the residual current signal to obtain the denoised data.

[0031] The present application also provides a circuit breaker protection method, the method comprising:

[0032] Collect residual current, temperature data and humidity data of electrical equipment;

[0033] Extract and analyze the collected data to obtain corresponding analysis results;

[0034] A leakage warning is triggered according to the analysis result, and a tripping and power-off operation is performed.

[0035] Optionally, the extracting and analyzing the collected data to obtain corresponding analysis results includes:

[0036] Obtaining a reference current and a current residual current of the circuit where the electrical device is located;

[0037] determining a corrected residual current of the circuit according to the reference current and the current residual current;

[0038] Adjusting the reference current according to the current residual current, or adjusting the reference current according to the corrected residual current to obtain an updated reference current;

[0039] The corrected residual current is adjusted according to the updated reference current to obtain an updated corrected residual current, and the analysis result is obtained based on the magnitude relationship between the corrected residual current and the residual current dynamic threshold.

[0040] The circuit breaker of the present application monitors the ambient temperature, ambient humidity and other parameters of the equipment in real time through a data monitoring mechanism, and performs intelligent analysis and processing on the residual current of the equipment in combination with these parameters through an analysis and processing mechanism, thereby being able to accurately distinguish whether the nature of the residual current of the equipment is a normal leakage current or a leakage fault current, thereby avoiding the shortcomings of traditional devices that have fixed thresholds and static judgments that are prone to misjudgment of leakage faults, thereby being able to improve the accuracy and timeliness of leakage protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 is a schematic diagram of the overall structure of a circuit breaker provided in an embodiment of the present application;

[0043] Figure 2 It is a flow chart of the circuit breaker protection method provided in the embodiment of the present application;

[0044] Figure 3 is a schematic diagram of a flow chart for determining and correcting residual current provided in an embodiment of the present application;

[0045] Wherein, the accompanying drawings are marked as follows:

[0046] 10. Data monitoring mechanism; 101. Environmental sampling component; 1011. Temperature sampler; 1012. Humidity sampler; 102. Protection current transformer; 103. Leakage transformer; 20. Analysis and processing mechanism; 201. Collector; 202. Processor; 203. Judger; 204. Outputter; 30. Actuator; 301. Releaser; 302. Early warning device. DETAILED DESCRIPTION

[0047] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than 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 the present application.

[0048] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0049] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0051] Existing leakage adaptive protection devices mainly adjust the protection gear by the size and duration of the residual current. For example, lowering the gear requires that the actual residual current is less than a certain proportion of the current gear value (such as 0.5 times) and lasts for a certain time (such as 2 minutes); raising the gear requires that the actual residual current is greater than a certain proportion of the current gear value (such as 0.5 times) and less than another proportion (such as 0.75 times), and lasts for a certain time (such as 1 minute). This adjustment method mainly relies on the static threshold and fixed time of the residual current. Although it can achieve leakage protection to a certain extent, its judgment logic is relatively simple and does not fully consider the influence of factors such as the power environment and equipment type.

[0052] However, the existing leakage protection devices have obvious deficiencies in practical applications. First, the gear adjustment and leakage protection parameter settings are relatively fixed, and cannot be dynamically optimized according to the actual power consumption environment and equipment requirements. When faced with complex and changeable power consumption conditions, especially when certain special equipment is running, the residual current may fluctuate greatly in a short period of time, but it is not a real leakage risk. Existing devices are prone to misjudgment, resulting in unnecessary power outages or protection failures. Secondly, the existing technology is not capable of distinguishing between normal leakage current and leakage fault current, and it is difficult to adapt to diverse equipment types and complex power consumption environments, and it is impossible to respond to leakage faults in a timely and accurate manner. In addition, the existing devices have not fully considered the differences and coordination requirements with terminal leakage protection in terms of primary or secondary residual current protection in low-voltage substations, resulting in deficiencies in protection range, action time selectivity, communication monitoring, and coordination with terminal protection, making it difficult to ensure the safe and stable operation of the power system.

[0053] The present application provides a circuit breaker, which is described in detail below.

[0054] See also Figure 1 , Figure 1 This is a schematic diagram of the overall structure of the circuit breaker provided in the embodiment of the present application. Figure 1 As shown, the circuit breaker of the present application may include a data monitoring mechanism 10, an analysis and processing mechanism 20 and an execution mechanism 30 connected to each other, wherein:

[0055] The data monitoring mechanism 10 is used to collect residual current, temperature data and humidity data of the equipment;

[0056] The analysis and processing mechanism 20 is used to extract and analyze the data collected by the data detection mechanism to obtain the analysis result of the equipment leakage analysis;

[0057] The actuator 30 is used to trigger the early warning information of the equipment leakage according to the analysis result, and perform the tripping and power-off operation on the equipment.

[0058] Specifically, the data monitoring mechanism 10 can be used to collect the operation data and environmental data of the equipment in real time, including residual current, temperature data and humidity data.

[0059] In some embodiments, the data monitoring mechanism 10 may include:

[0060] Environmental sampling component 101, used to monitor the temperature data and humidity data of the equipment;

[0061] A protection current transformer 102 is used to collect the current of each phase in the three-phase circuit of the device;

[0062] The leakage current transformer 103 is used to detect the residual current in the three-phase circuit.

[0063] Specifically, the data monitoring mechanism 10 is an important component of the circuit breaker, responsible for collecting the operation data and environmental data of the equipment, and providing basic data support for subsequent intelligent analysis and protection execution.

[0064] In some embodiments, the environmental sampling component 101 can be used to monitor the temperature data and humidity data of the operating environment of the device, and transmit the collected temperature data and humidity data to the analysis and processing mechanism 20. The environmental sampling component 101 includes:

[0065] The temperature sampler 1011 is used to monitor the ambient temperature of the environment where the device is located in real time and obtain temperature data;

[0066] The humidity sampler 1012 is used to monitor the ambient humidity of the environment where the device is located in real time and obtain humidity data.

[0067] Ambient temperature and humidity are important factors that affect the insulation performance of electrical equipment. By monitoring these parameters, we can better understand the operating status of the equipment and determine whether there is a leakage risk in combination with residual current data.

[0068] In some embodiments, the protection current transformer 102 can be used to collect the current of each phase in the three-phase circuit of the device. The protection current transformer 102 can monitor the current changes of each phase in the three-phase circuit in real time, capture the slight fluctuation of the current, and provide accurate data support for subsequent analysis.

[0069] In some embodiments, the leakage transformer 103 can be used to detect residual current. The leakage transformer 103 can detect residual current and help determine whether there is a leakage fault.

[0070] It can be understood that the environmental sampling component 101, the protection current transformer 102 and the leakage transformer 103 work together to collect the temperature, humidity, current of each phase and residual current data of the equipment. These data are transmitted to the analysis and processing mechanism 20 for further analysis and judgment. Through the comprehensive monitoring of multiple parameters, the data monitoring mechanism 10 can provide more comprehensive equipment operation status information and provide a data basis for accurately judging leakage faults.

[0071] The data monitoring mechanism 10 of the present application can realize all-round monitoring of the equipment operation status and environmental parameters through the collaborative work of the environmental sampling component 101, the protection current transformer 102 and the leakage transformer 103. This multi-parameter monitoring method can more comprehensively reflect the operation of the equipment, provide reliable data support for subsequent intelligent analysis and protection execution, and significantly improve the accuracy and adaptability of leakage protection. Multi-parameter acquisition through the data monitoring mechanism 10 can provide comprehensive equipment operation status and environmental information, providing data support for subsequent intelligent analysis.

[0072] Specifically, the analysis and processing mechanism 20 can extract, analyze and process the data collected by the data monitoring mechanism 10 to determine whether there is a leakage fault in the equipment.

[0073] In some embodiments, the analysis processing mechanism 20 may include:

[0074] The collector 201 is used to receive the temperature data and humidity data sent by the environmental sampling component 101, the current signals of each phase sent by the protection current transformer 102, and the residual current sent by the leakage transformer 103;

[0075] The processor 202 is used to receive and process the collected data from the collector 201 to obtain denoised data;

[0076] A judgement unit 203 is used to receive and process the denoised data to determine whether the device has a leakage;

[0077] The output device 204 is used to receive the judgment result, output a control signal based on the judgment result, and send the control signal to the actuator 30.

[0078] Specifically, the analysis and processing mechanism 20 is the core part of the circuit breaker, and is responsible for processing, analyzing and judging the data collected by the data monitoring mechanism 10, and finally outputting a control signal to trigger a protection operation.

[0079] In some embodiments, the collector 201 can be used to receive various types of data sent by the data monitoring mechanism 10, such as temperature data and humidity data sent by the environmental sampling component 101, current signals of each phase sent by the protection current transformer 102, and residual current sent by the leakage transformer 103. The collector 201 can serve as a data transfer station to integrate data from different sensors and transmit them to the processor 202 to ensure the integrity and real-time performance of the data.

[0080] In some embodiments, the processor 202 can receive the data transmitted by the collector 201 and process the data to obtain denoised data. A digital filtering algorithm can be used to process the residual current signal and the residual current to remove noise and interference signals and improve data quality. The temperature data and humidity data can be standardized to ensure that the data format is consistent. Through denoising, the processor 202 can provide cleaner and more accurate data, laying the foundation for subsequent judgment and analysis.

[0081] In some embodiments, the judge 203 can receive the denoised data processed by the processor 202, and judge whether the device has a leakage fault based on these data. Specifically, the waveform feature extraction of the residual current signal can be performed to analyze its amplitude, rate of change, harmonic content and other characteristics. The artificial intelligence model can be used to perform a comprehensive analysis in combination with the ambient temperature and humidity data to determine whether the residual current is a normal leakage current or a leakage fault current. For example, when the residual current amplitude increases sharply and the harmonic content increases significantly, the judge 203 will determine it as a leakage fault current. Through intelligent analysis, the judge 203 can accurately distinguish between normal leakage current and leakage fault current to avoid misjudgment and missed judgment.

[0082] In some embodiments, the output device 204 can receive the judgment result of the judgement device 203, and output a control signal based on the judgment result, and send the control signal to the actuator 30. If the judgment result is a leakage fault current, the output device 204 will send a control signal to trigger the tripping and power-off operation and sound and light alarm of the actuator 30. If the judgment result is that the normal leakage current increases abnormally, the output device 204 will send an early warning signal to remind the operation and maintenance personnel to perform inspections and maintenance. The output device 204 is a bridge between the analysis and processing mechanism 20 and the actuator 30 to ensure that the judgment result can be converted into a protection operation in a timely manner.

[0083] In some embodiments, the analysis and processing mechanism 20 may first receive data from the environmental sampling component 101, the protection current transformer 102, and the leakage transformer 103 through the collector 201. Then, the received data is denoised by the processor 202 to obtain high-quality denoised data. Then, the denoised data is feature extracted and intelligently analyzed by the judge 203 to determine whether the device has a leakage fault. Finally, the output device 204 generates a control signal according to the judgment result and sends it to the actuator 30 to trigger the corresponding protection operation.

[0084] The analysis and processing mechanism 20 realizes intelligent analysis and accurate judgment of the equipment operation data through the collaborative work of the collector 201, the processor 202, the judge 203 and the output 204. Through denoising, feature extraction and artificial intelligence model analysis, the analysis and processing mechanism 20 can accurately distinguish between normal leakage current and leakage fault current, and output corresponding control signals to ensure that the circuit breaker can perform protection operations in a timely and accurate manner, significantly improving the reliability and safety of leakage protection. Through the analysis and processing mechanism 20, various types of parameters and data related to the equipment are intelligently analyzed, and normal leakage current and leakage fault current can be accurately distinguished, misjudgment and missed judgment can be avoided, and the accuracy of leakage protection can be improved.

[0085] The execution mechanism 30 may trigger corresponding protection operations according to the analysis results obtained by the analysis and processing mechanism 20. In some embodiments, the execution mechanism 30 may be connected to the output device 204, and the execution mechanism 30 may include:

[0086] The early warning device 302 is used to send out an audible and visual alarm signal when the control signal indicates that there is a leakage fault in the equipment;

[0087] The trip device 301 is used to cut off the power supply of the faulty line of the device when the control signal indicates that there is a leakage fault in the device and the duration of the leakage fault is greater than a preset duration.

[0088] Specifically, the actuator 30 is the final execution part of the circuit breaker, responsible for executing the corresponding protection operation according to the control signal output by the analysis and processing mechanism 20. The actuator 30 is connected to the output device 204, receives the control signal from the output device 204, and triggers different protection actions according to the signal content.

[0089] In some embodiments, when the control signal indicates that the device has a leakage fault, the early warning device 302 can send an audible and visual alarm signal. The early warning device 302 can receive the control signal from the output device 204 and determine whether the signal content is a leakage fault. If it is determined to be a leakage fault, the early warning device 302 immediately triggers the audible and visual alarm device and sends an alarm signal to alert relevant personnel. The early warning device 302 can send an alarm in time when a leakage fault occurs, helping the operation and maintenance personnel to quickly locate the problem and avoid further expansion of the accident.

[0090] In some embodiments, when the control signal indicates that there is a leakage fault in the device and the fault duration is longer than a preset duration, the tripper 301 will cut off the power supply of the faulty line of the device. The tripper 301 can receive the control signal from the output device 204, determine whether the signal content is a leakage fault, and detect the duration of the fault. If the leakage fault lasts for more than a preset duration (for example, 1 second or 2 seconds), the tripper 301 will immediately act to cut off the power supply of the faulty line. The tripper 301 is the core protection component of the circuit breaker, which can quickly cut off the power supply after confirming the leakage fault to prevent the occurrence of serious consequences such as electrical fires and electric shock accidents.

[0091] Specifically, the actuator 30 can first receive the control signal from the analysis and processing mechanism 20 through the output device 204. If the control signal indicates that there is a leakage fault in the equipment, the early warning device 302 will immediately send out an audible and visual alarm signal. If the leakage fault lasts for more than a preset time, the trip device 301 will cut off the power supply of the faulty line. Therefore, the early warning device 302 can remind relevant personnel through audible and visual alarms, and the trip device 301 can prevent the accident from expanding by cutting off the power supply.

[0092] In summary, the actuator 30 of the present application achieves rapid response and precise protection against leakage faults through the coordinated work of the early warning device 302 and the release device 301. When there is a leakage fault in the equipment, the early warning device 302 can promptly issue an alarm to alert relevant personnel; and the release device 301 can quickly cut off the power supply when the fault duration exceeds the preset value to prevent the accident from further expanding. This dual protection mechanism significantly improves the safety and reliability of the power system and ensures the safety of equipment and personnel. Through early warning and tripping operations, timely response to leakage faults is achieved to ensure the safety of equipment and personnel.

[0093] The data monitoring mechanism 10 collects the residual current, temperature, humidity and other data of the equipment in real time, and transmits the data to the analysis and processing mechanism 20. The analysis and processing mechanism 20 filters, extracts features and intelligently analyzes the collected data to determine whether there is a leakage fault. If it is determined to be a leakage fault, the actuator 30 immediately triggers the trip 301 to cut off the power supply and sends an alarm signal through the early warning device 302. If it is determined that the normal leakage current increases abnormally, the actuator 30 sends a warning message to remind the operation and maintenance personnel to conduct inspections and maintenance.

[0094] Through the coordinated work of the data monitoring mechanism 10, the analysis and processing mechanism 20 and the execution mechanism 30, this solution realizes all-round monitoring, intelligent analysis and precise protection of electrical equipment. Compared with the traditional leakage protection device, this solution can more accurately identify leakage faults, adapt to the complex and changeable power environment, and significantly improve the safety and reliability of the power system.

[0095] In some embodiments, the processor 202 may also be used to obtain a reference current, and to correct the residual current based on the reference current to obtain a corrected residual current. Specifically, the processor 202 is not only used to perform denoising on the collected data, but is also responsible for obtaining a reference current, and to correct the residual current based on the reference current to obtain a corrected residual current.

[0096] Among them, the reference current refers to the normal leakage current generated by the device under normal operating conditions. The processor 202 obtains the reference current through historical data or preset values. The processor 202 can compare the actually measured residual current with the reference current to calculate the corrected residual current. The corrected residual current eliminates the influence of the normal leakage current and only reflects the possible leakage fault current. By correcting the residual current, the processor 202 can more accurately determine whether there is a leakage fault and avoid misjudgment caused by fluctuations in the normal leakage current, thereby improving the accuracy and reliability of leakage protection.

[0097] In some embodiments, the judger 203 can also be used to extract and analyze waveform features of the denoised data, and determine the judgment result through a preset artificial intelligence model in combination with ambient temperature and humidity parameters.

[0098] Specifically, the judge 203 can not only be used to receive the denoised data from the processor 202, but also be responsible for extracting and analyzing the waveform features of these data, and combining the ambient temperature and humidity parameters to determine the final judgment result through a preset artificial intelligence model. The judge 203 can perform waveform analysis on the denoised residual current signal and extract key features, such as the amplitude, rate of change, harmonic content, etc. of the current to identify abnormal fluctuations in the current. The judge 203 can combine the extracted waveform features with the ambient temperature and humidity parameters to comprehensively analyze the operating status of the equipment. For example, a high temperature and high humidity environment may cause the insulation performance to deteriorate, thereby affecting the change of the residual current.

[0099] In some embodiments, the judge 203 can use a preset artificial intelligence model to determine whether the residual current is a normal leakage current or a leakage fault current based on waveform characteristics and environmental parameters. For example, when the residual current amplitude increases sharply and the harmonic content increases significantly, the model will determine it as a leakage fault. The judge 203 can send the final judgment result to the output device 204 to trigger the corresponding protection operation (such as early warning or tripping power off). In this way, the judge 203 can accurately distinguish between normal leakage current and leakage fault current, avoid misjudgment and missed judgment, and significantly improve the accuracy and reliability of leakage protection.

[0100] In some embodiments, the judger 203 can also be used to generate a first judgment result when the reference current increases, and generate a second judgment result when the nature of the residual current is a leakage fault current and the duration of the leakage fault current is greater than a preset duration.

[0101] Specifically, when the reference current (normal leakage current) increases, the judge 203 generates a first judgment result. This indicates that the normal leakage current of the equipment has increased, which may be caused by factors such as ambient temperature, humidity changes or equipment aging. At this time, the judge 203 will issue a warning signal to remind the operation and maintenance personnel to conduct inspections and maintenance, but will not trigger the tripping and power-off operation. When the nature of the residual current is determined to be a leakage fault current, and the duration of the leakage fault current is greater than the preset duration (for example, 1 second or 2 seconds), the judge 203 generates a second judgment result. This indicates that there is a continuous leakage fault in the equipment, which may cause an electrical fire or electric shock accident. At this time, the judge 203 will trigger the tripping and power-off operation, and send out an audible and visual alarm signal to cut off the power supply of the faulty line to prevent the accident from expanding.

[0102] Through these two judgment results, the judger 203 can distinguish between normal leakage current increase and real leakage fault, ensuring that appropriate protection measures are taken when necessary, thereby avoiding misjudgment and ensuring the safety of equipment and personnel.

[0103] In some embodiments, the output device 204 may also be used to output a first control signal for controlling the early warning device 302 according to the first judgment result, and to output a second control signal for controlling the release device 301 according to the second judgment result.

[0104] Specifically, according to this solution, the output device 204 can not only be used to receive the judgment result of the judge 203, but also be responsible for outputting corresponding control signals according to different judgment results to trigger the protection operation of the actuator 30. When the judge 203 generates a first judgment result (i.e., the reference current increases, indicating that the normal leakage current increases), the output device 204 will output a first control signal. This signal is used to control the early warning device 302, trigger an audible and visual alarm, and remind the operation and maintenance personnel to perform inspections and maintenance, but will not cut off the power supply. Correspondingly, when the judge 203 generates a second judgment result (i.e., the residual current is a leakage fault current and the duration exceeds the preset duration), the output device 204 will output a second control signal. This signal is used to control the trip device 301, trigger the tripping and power-off operation, cut off the power supply of the faulty line, and simultaneously trigger an audible and visual alarm to prevent the accident from expanding.

[0105] By outputting different control signals, the output device 204 can accurately perform corresponding protection operations according to the judgment results, which not only avoids power outages caused by misjudgment, but also cuts off the power supply in time when a real leakage fault occurs, thereby ensuring the safety of equipment and personnel.

[0106] In some embodiments, the processor 202 may also be configured to process the residual current signal through a digital filtering algorithm to remove noise and interference signals from the residual current signal to obtain denoised data.

[0107] Specifically, the processor 202 can not only be used to obtain the reference current and correct the residual current, but also be responsible for processing the residual current signal through a digital filtering algorithm to remove noise and interference signals in the signal, thereby obtaining denoised data. The processor 202 can use a digital filtering algorithm (such as low-pass filtering, band-pass filtering, etc.) to process the residual current signal to filter out high-frequency noise and interference signals. These noises and interferences may come from electromagnetic interference, equipment vibration, or other external factors.

[0108] After filtering, the noise and interference in the residual current signal can be effectively removed to obtain clean denoised data. These denoised data can more accurately reflect the actual residual current of the equipment. The denoised data can provide high-quality basic data for subsequent waveform feature extraction and intelligent analysis, ensuring that the judge 203 can more accurately judge the nature of the residual current (normal leakage current or leakage fault current), thereby improving the accuracy and reliability of leakage protection. Through the digital filtering algorithm, the processor 202 can significantly improve the quality of the data, laying a solid foundation for the intelligent analysis and accurate judgment of the entire leakage protection system.

[0109] See also Figure 2 , Figure 2 A schematic diagram of a flow chart of a circuit breaker protection method provided in an embodiment of the present application. The circuit breaker protection method may include the following steps:

[0110] Step S110: collecting residual current, temperature data and humidity data of the electrical equipment.

[0111] Specifically, the data monitoring mechanism 10 can be responsible for collecting the residual current, temperature data and humidity data of the electrical equipment, and can collect the residual current in the three-phase circuit of the electrical equipment through the protective current transformer 102. The residual current is a key parameter for determining whether the equipment has a leakage fault. The temperature data of the environment around the equipment can be collected through the temperature sampler 1011. Temperature changes may affect the insulation performance of the equipment, and thus affect the magnitude of the residual current. The humidity data of the environment around the equipment can also be collected through the humidity sampler 1012. Humidity changes may also affect the insulation performance of the equipment, especially in a high humidity environment, the risk of leakage of the equipment may increase.

[0112] The above data is transmitted to the analysis and processing unit 20 in real time for subsequent intelligent analysis and judgment, ensuring that the leakage protection system can accurately identify leakage faults and take corresponding protection measures.

[0113] Step S120: extract and analyze the collected data to obtain corresponding analysis results.

[0114] According to this solution, the analysis and processing unit 20 is responsible for extracting and analyzing the data collected by the data monitoring unit 10, and finally obtaining the corresponding analysis results. The following is a simple explanation of its working principle:

[0115] Specifically, the analysis and processing unit 20 extracts key features from the collected data, such as the amplitude, rate of change, harmonic content, and ambient temperature and humidity parameters of the residual current. A digital filtering algorithm can be used to process the residual current signal to remove noise and interference signals to obtain clean denoised data. Combined with the ambient temperature and humidity data, the waveform characteristics of the residual current are intelligently analyzed through an artificial intelligence model to determine whether the residual current is a normal leakage current or a leakage fault current.

[0116] It can be understood that if the residual current is determined to be a normal leakage current, the analysis result is that the equipment is operating normally and no protection operation is required. If the residual current is determined to be a leakage fault current, the analysis result is that the equipment has a leakage fault and a protection operation needs to be triggered.

[0117] Through data extraction and analysis, the analysis and processing unit 20 can accurately determine the status of the equipment and provide a reliable basis for the protection operation of the actuator 30.

[0118] In some embodiments, step S120 may further include:

[0119] Obtain the reference current and current residual current of the circuit where the electrical equipment is located;

[0120] Determine the corrected residual current of the circuit according to the reference current and the current residual current;

[0121] The reference current is adjusted according to the current residual current, or the reference current is adjusted according to the corrected residual current to obtain an updated reference current;

[0122] The corrected residual current is adjusted according to the updated reference current to obtain the updated corrected residual current, and the analysis result is obtained based on the magnitude relationship between the corrected residual current and the residual current dynamic threshold.

[0123] like Figure 3 As shown, the reference current I ref The initial value can be set to 0. In actual operation, a reference value can be determined based on the rated parameters of the equipment, the current characteristics during normal operation, and other factors for comparison with the actual measured current. The current in the circuit is monitored in real time by protecting current transformers and leakage transformers. These transformers can detect the residual current generated by leakage in the three-phase circuit. After signal acquisition and processing, the current residual current I △ The actual measured value.

[0124] In some embodiments, the calculation relationship I in the flowchart can be ′ △ =I △ -I ref , to determine the corrected residual current and start phase I ref =0, at this time I ′ △ =I △ . But with the reference current I ref Adjust according to subsequent conditions, I ′ △ The value of will also change accordingly, which reflects the deviation of the current residual current relative to the reference value after considering the influence of the reference current.

[0125] Furthermore, we can first determine I ′ △ <0 is true, if true, execute I ref =I ref +I ′ △ , that is, adjust the reference current according to the current residual current. ′△ <0 is not true, then further determine whether it continues t min Satisfy I ′ △ >0.5I △n , and I ′ △ <0.75I △n If the condition is met, execute I ref =I ref +0.5I △n , I △n It is the residual current dynamic threshold value, which adjusts the reference current according to the corrected residual current and related threshold conditions to obtain an updated reference current.

[0126] Further, after obtaining the updated reference current, according to formula I ′ △ =I △ -I ref The corrected residual current is calculated and adjusted to obtain the updated I ′ △ Finally, the updated corrected residual current I ′ △ Compare with the residual current dynamic threshold. According to the comparison result, determine whether the circuit has leakage fault or other abnormal conditions, and obtain corresponding analysis results, such as whether to issue an early warning, whether to cut off the circuit, etc. The whole process is continuously monitored, calculated and adjusted to achieve accurate analysis and processing of residual current in the circuit to ensure the safe operation of electrical equipment and circuit systems.

[0127] Step S130: triggering a leakage warning according to the analysis result, and performing a tripping and power-off operation.

[0128] Specifically, the actuator 30 is responsible for triggering corresponding protection operations according to the analysis results of the analysis and processing mechanism 20, including leakage warning and tripping and power-off operations. When the analysis result shows that the equipment has a leakage fault or the normal leakage current increases abnormally, the actuator 30 will trigger the warning device 302 and send out an audible and visual alarm signal. The warning signal reminds the operation and maintenance personnel to check the equipment in time to avoid further expansion of the accident.

[0129] When the analysis result shows that the equipment has a leakage fault and the fault duration exceeds the preset duration, the actuator 30 will trigger the trip 301 to cut off the power supply of the faulty line. The tripping and power-off operation can prevent the occurrence of serious consequences such as electrical fires and electric shock accidents, and ensure the safety of equipment and personnel.

[0130] By triggering the leakage warning and performing the tripping and power-off operation, the actuator 30 can respond to the leakage fault in time to ensure the safe and stable operation of the power system.

[0131] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the detailed description of other embodiments above, and will not be repeated here.

[0132] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0133] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0134] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more application embodiments, in the above description of the embodiments of this application, multiple features are sometimes merged into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0135] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0136] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, documents, etc., cited in this application is hereby incorporated by reference in its entirety, except for application history documents that are inconsistent with or conflicting with the content of this application, and documents that limit the broadest scope of the claims of this application (currently or later attached to this application). It should be noted that if the descriptions, definitions, and / or use of terms in the accompanying materials of this application are inconsistent or conflicting with the content described in this application, the descriptions, definitions, and / or use of terms in this application shall prevail.

[0137] The above is a detailed introduction to a circuit breaker provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for technicians in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A circuit breaker, characterized in that: It includes interconnected data monitoring agencies, analysis and processing agencies, and execution agencies, among which: The data monitoring mechanism is used to collect residual current, temperature data and humidity data of the equipment; The analysis and processing mechanism is used to extract and analyze the data collected by the data detection mechanism to obtain the analysis result of the equipment leakage analysis; The actuator is used to trigger the early warning information of the equipment leakage according to the analysis result, and perform a tripping and power-off operation on the equipment.

2. The circuit breaker according to claim 1, characterized in that: The data monitoring agency includes: An environmental sampling component, used for monitoring temperature data and humidity data of the device; A protective current transformer, used for collecting currents of each phase in a three-phase circuit of the device; The leakage current transformer is used to detect the residual current in the three-phase circuit.

3. The circuit breaker according to claim 2, characterized in that: The environmental sampling component transmits the collected temperature data and humidity data to the analysis and processing mechanism, and the environmental sampling component includes: A temperature sampler, used to monitor the ambient temperature of the environment where the device is located in real time to obtain the temperature data; The humidity sampler is used to monitor the ambient humidity of the environment where the device is located in real time to obtain the humidity data.

4. The circuit breaker according to claim 2, characterized in that: The analysis and processing mechanism comprises: A collector, used for receiving the temperature data and the humidity data sent by the environmental sampling component, the current signals of each phase sent by the protection current transformer, and the residual current sent by the leakage transformer; A processor, used for receiving and processing the collected data of the collector to obtain denoised data; A judger, used for receiving and processing the denoised data, and determining a judgment result of whether the device has a leakage; An output device is used to receive the judgment result, output a control signal based on the judgment result, and send the control signal to the actuator.

5. The circuit breaker according to claim 4, characterized in that: The actuator is connected to the output device, and the actuator includes: An early warning device, used to send out an audible and visual alarm signal when the control signal indicates that the device has a leakage fault; A release is used to cut off the power supply of the faulty circuit of the device when the control signal indicates that the device has a leakage fault and the duration of the fault is greater than a preset duration.

6. The circuit breaker according to claim 5, characterized in that: The processor is further used to obtain a reference current, and to correct the residual current based on the reference current to obtain a corrected residual current.

7. The circuit breaker according to claim 4, characterized in that: The judger is also used to extract and analyze waveform features of the denoised data, and determine the judgment result through a preset artificial intelligence model in combination with ambient temperature and humidity parameters.

8. The circuit breaker according to claim 6, characterized in that: The determiner is further configured to generate a first determination result when the reference current increases; When the property of the residual current is a leakage fault current, and the duration of the leakage fault current is greater than the preset duration, a second determination result is generated.

9. The circuit breaker according to claim 8, characterized in that: The output device is also used to output a first control signal for controlling the early warning device according to the first judgment result; A second control signal for controlling the release is output according to the second judgment result.

10. The circuit breaker according to claim 4, characterized in that The processor is further used to process the residual current signal through a digital filtering algorithm to remove noise and interference signals from the residual current signal to obtain the denoised data.

11. A circuit breaker protection method, characterized in that: The method comprises: Collect residual current, temperature data and humidity data of electrical equipment; Extract and analyze the collected data to obtain corresponding analysis results; A leakage warning is triggered according to the analysis result, and a tripping and power-off operation is performed.

12. The circuit breaker protection method according to claim 11, characterized in that: The collected data is extracted and analyzed to obtain corresponding analysis results, including: Obtaining a reference current and a current residual current of the circuit where the electrical device is located; determining a corrected residual current of the circuit according to the reference current and the current residual current; Adjusting the reference current according to the current residual current, or adjusting the reference current according to the corrected residual current to obtain an updated reference current; The corrected residual current is adjusted according to the updated reference current to obtain an updated corrected residual current, and the analysis result is obtained based on the magnitude relationship between the corrected residual current and the residual current dynamic threshold.

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