A method, system and apparatus for controlling a drop-out device

Abstract

The application relates to a drop-out control method, system and device, wherein a data collector and a communication device are contained in the drop-out control device, the data collector comprises a temperature sensor and a current transformer, and the communication device is used for data communication; the method comprises the following steps: acquiring temperature data and current data collected by the data collector, and obtaining an overcurrent temperature increase characteristic according to the temperature data and the current data; judging a threshold mode according to the overcurrent temperature increase characteristic; and performing drop-out control on the drop-out control device according to the ductility of the threshold mode. The application can reduce misjudgment of overcurrent analysis and reliably control the drop-out control device.

Description

Technical Field

[0001] This application relates to the field of power protection technology, specifically to a control method, system, and device for a drop-out interrupter. Background Technology

[0002] In power systems, drop-out breakers are typically installed between high-voltage power lines and transformers. These drop-out breakers often employ drop-out fuses to meet the operational needs of power systems, including maintenance, repair, and power outage control. These breakers include HRC fuses, vacuum circuit breakers, and air circuit breakers. Air circuit breakers, in particular, generally do not require manual tripping. When an electric arc is generated, it is guided into the arc-extinguishing chamber, where it mixes with air and is cooled, thus extinguishing the arc. They have the ability to automatically disconnect the circuit without manual tripping. Once a fault or overcurrent is detected, the contact separator, usually working in conjunction with a spring mechanism, performs the disconnection operation. However, despite the good arc extinguishing performance of air circuit breakers, in the process of dealing with uncertain overcurrent, the arc extinguishing problem often occurs with a prolonged arc duration. When overcurrent phenomena within the tolerance range continue to occur, the formation and extinguishing of the arc will create unstable temperature factors. Temperature changes may affect the circuit breaker's misjudgment of circuit anomalies such as overload and short circuit, thus making abnormal or unnecessary interruption operations. The resulting manpower and material consumption cannot be ignored. Summary of the Invention

[0003] The purpose of this application is to propose a control method, system and device for a drop-out interrupter, which can reduce misjudgments in overcurrent analysis and reliably control the drop-out interrupter.

[0004] To achieve the above objectives, embodiments of this application provide a control method for a drop-out interrupter, wherein the drop-out interrupter includes a data acquisition unit and a communication device, the data acquisition unit includes a temperature sensor and a current transformer, and the communication device is used for data communication. The method includes: The temperature and current data collected by the data acquisition device are obtained, and the overcurrent temperature increase characteristics are obtained based on the temperature and current data. Determine the threshold mode based on the overcurrent temperature increase characteristics; The drop-out interruption device is controlled based on the extensibility of the threshold mode.

[0005] Furthermore, obtaining the current-temperature increase characteristics of the drop-out interrupter based on the temperature and current data specifically includes: The ratio of the difference between the current value at the current moment and the previous moment to the difference between the current value and the temperature increase threshold at the current moment is used as the overcurrent temperature increase characteristic.

[0006] Furthermore, the current-temperature increase characteristics of the drop-out interrupter obtained based on the temperature and current data are specifically described by the following formula: ;

[0007] Where Crcv and Crcv' represent the current values ​​corresponding to the current calculation time and the previous time, respectively; exp() is an exponential function with the natural constant e as the base; Crtp and Crtp' represent the temperature values ​​corresponding to the current calculation time and the previous time, respectively; and Sgtp is the temperature increase threshold.

[0008] Furthermore, the temperature increase threshold is obtained in the following manner: Set a time interval as the temperature increase search segment ETPZone, where ETPZone ∈ [60, 120] minutes; The temperature values ​​corresponding to each time point in the previous time period ETPZone are processed by mean filtering and curve fitting is performed. The average value of the obtained fitted curve is recorded as the first temperature value. Each sub-climbing segment is identified from the obtained fitted curve. A sub-climbing segment is the part of the fitted curve from any minimum value to the first maximum value obtained by searching along the time sequence. If the numerical range of a sub-climbing segment contains the first temperature value, the sub-climbing segment is defined as a type I climbing segment. If the minimum value in the numerical range of a sub-climbing segment is greater than the first temperature value, the sub-climbing segment is defined as a type II climbing segment. Calculate the average value of the set of each type of climbing segment and denote it as the temperature increase threshold Sgtp.

[0009] Furthermore, the step of determining the threshold mode based on the overcurrent temperature increase characteristics specifically includes: Within the current temperature increase search segment, the average value of the overcurrent temperature increase characteristics of each type II climbing segment is recorded as the first threshold, and any moment that satisfies the overcurrent temperature increase characteristic being greater than the first threshold is defined as a type I threshold point; if the next moment of a type I threshold point is not a type I threshold point, it is defined as a type II threshold point, and each moment is traversed in reverse time order starting from the type I threshold point until the traversed moment does not belong to a type I threshold point, and the traversed moments form a set as the abnormal event corresponding to the type II threshold point; The ratio of the maximum to the minimum current value at each moment under the abnormal event is recorded as the overflow weight. The position difference weight is calculated based on the time difference between the second type threshold point corresponding to the abnormal event and the current moment. The abnormal state corresponding to the current time is calculated based on the overflow weight and the position difference weight. The average value of the abnormal state corresponding to each time within the temperature increase search segment is recorded as the state level. If the abnormal state at the current moment is greater than the state level, then the threshold mode is assigned the value TRUE; otherwise, it is assigned the value FALSE.

[0010] Furthermore, the step of determining the threshold mode based on the overcurrent temperature increase characteristics specifically includes: Set a time interval as the temperature increase search segment ETPZone, where ETPZone ∈ [60, 120] minutes; Within the current temperature increase search segment, the sequence formed by each overcurrent temperature increase feature is used as the flow sign monitoring sequence, and the time corresponding to each maximum value in the flow sign monitoring sequence is used as the overcurrent sign time point. Based on the location of the overcurrent sign time point, the overcurrent sign segment is selected from the temperature increase search segment. The difference between the current value at any time and the current value at the previous time is recorded as the point current increment. The time when the current increment is less than the current increment threshold is defined as the increment trough. Among them, the median of each current increment in the temperature increase search segment is calculated as the current increment threshold. If a moment is an incremental depression and the temperature value corresponding to that moment has a minimum value, then the moment that satisfies both conditions is defined as a uniform time point; The time interval between any overcurrent sign point and the first uniform time point obtained by searching in the reverse time direction is taken as an overcurrent sign segment. The proportion of incremental depressions in the overcurrent sign segment is recorded as the depression frequency. The average value of the overcurrent temperature increase characteristics at each time point in the overcurrent sign segment is calculated and recorded as the sign segment order value. The overcurrent abnormal effect state at the current time is calculated based on the depression frequency and the sign segment order value. The minimum value among the intercepts of each flow segment is the standard intercept STDs. The overcurrent abnormality state at each time point is constructed into a sequence. The average value of the first STDs elements of the sequence is used as the overcurrent abnormality state calibration value at the current time point, and the average value of the sequence is used as the overcurrent abnormality state level. If the current overcurrent anomaly state calibration value is greater than the overcurrent anomaly state level, then the threshold mode is assigned the value TRUE; otherwise, it is assigned the value FALSE.

[0011] Furthermore, the step of controlling the interruption of the drop-out device based on the extensibility of the threshold mode specifically includes: Let a positive integer be the extended interval KTms, Ktms∈[1,KOMin], and KOMin be the frequency of reading the current value within one minute; If the threshold mode values ​​obtained at the current time and the previous KTms times are all TRUE, then the interruption operation is allowed, that is, the drop-out interruption and cutoff circuit is allowed; otherwise, the interruption operation is not allowed, that is, the drop-out interruption and cutoff circuit is temporarily not allowed.

[0012] An embodiment of this application also provides a control system for a drop-out interrupter, wherein the drop-out interrupter includes a data acquisition unit and a communication device, the data acquisition unit includes a temperature sensor and a current transformer, and the communication device is used for data communication. The system includes: The data acquisition module is used to acquire temperature data and current data collected by the data acquisition device, and to obtain overcurrent temperature increase characteristics based on the temperature data and current data. A threshold mode determination module is used to determine the threshold mode based on the overcurrent temperature increase characteristics. The interruption control module is used to control the interruption of the drop-out interruption device based on the extensibility of the threshold mode.

[0013] An embodiment of this application also provides a drop-out interruptor control device, comprising: a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the drop-out interruptor control method described in the above embodiments.

[0014] The embodiments of this application have the following beneficial effects: quantifying the error of the overcurrent judgment of the device's circuit by the temperature fluctuation characteristics formed and extinguished by the formation of the electric arc during the observation period, reducing the risk of the continuous temperature change after the continuous occurrence of overcurrent within the tolerance range affecting the circuit breaker's misjudgment of circuit anomalies such as overload and short circuit, improving the accuracy and precision of the drop-out intelligent interruption control judgment in the power system, having practical significance for reducing the loss and waste of related components of the drop-out interruption device, enhancing and protecting the stability and sustainability of the power system, and effectively reducing the risk of misjudgment in overcurrent analysis. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a flowchart of a drop-out interruption device control method in one embodiment of this application.

[0017] Figure 2 This is a structural diagram of a drop-out interruption device control system according to one embodiment of this application. Detailed Implementation

[0018] The detailed description of the accompanying drawings is intended to illustrate some present embodiments of this application and is not intended to represent only the forms in which this application can be implemented. It should be understood that the same or equivalent functionality may be achieved by different embodiments intended to be included within the scope of this application.

[0019] This application provides a control method for a drop-out interrupter. Several identical drop-out interrupters exist in the power system. The drop-out interrupter is any one of an air magnetic circuit breaker, an electronic air circuit breaker, or a digital air circuit breaker. Each drop-out interrupter includes a data acquisition unit and a communication device. The data acquisition unit includes a temperature sensor and a current transformer. The communication device is a device or module based on a wireless local area network, cellular communication, or Zigbee Internet of Things, and is used for data communication.

[0020] See Figure 1 The method in this embodiment includes the following steps: Step S1: Obtain the temperature data and current data collected by the data acquisition device, and obtain the overcurrent temperature increase characteristics based on the temperature data and current data; Specifically, the method for acquiring data and obtaining overcurrent temperature increase characteristics through a data acquisition device is as follows: the temperature sensor and current transformer in the data acquisition device acquire data at the same execution frequency, and respectively acquire the temperature value and current value at the same moment. In one example, a time interval is defined as the temperature increase search segment ETPZone, where ETPZone ∈ [60, 120] minutes. The temperature values ​​corresponding to each time point in the time interval before the current time are processed by mean filtering and curve fitting is performed. The average value of the obtained fitted curve is recorded as the first temperature value. Each sub-climbing segment is identified from the obtained fitted curve. The sub-climbing segment is the part of the fitted curve from any minimum value to the first maximum value obtained by searching along the time sequence. If the numerical range of the sub-climbing segment contains the first temperature value, the sub-climbing segment is defined as a type I climbing segment. If the minimum value in the numerical range of the sub-climbing segment is greater than the first temperature value, the sub-climbing segment is defined as a type II climbing segment. The average value of the set of each type I climbing segment is calculated and recorded as the temperature increase threshold Sgtp. The overcurrent temperature increase characteristic is defined as the ratio of the difference between the current value and the previous time to the difference between the current temperature value and the temperature rise threshold. Alternatively, the above method for calculating the overcurrent temperature increase characteristic can be replaced by the following method, calculating the overcurrent temperature increase characteristic SOEv based on the temperature value, temperature rise threshold, and current value: ;

[0021] Where Crcv and Crcv' represent the current values ​​corresponding to the current calculation time and the previous time, respectively; exp() is an exponential function with the natural constant e as the base; and Crtp and Crtp' represent the temperature values ​​corresponding to the current calculation time and the previous time, respectively.

[0022] By reflecting the relative anomaly of the current value to the current measurement in the circuit within the temperature increase search segment using the temperature increase characteristics, the sensitivity of identifying relative anomalies in the temperature increase range can be improved.

[0023] Step S2: Determine the threshold mode based on the overcurrent temperature increase characteristics; In one example, a time interval is set as the temperature increase search segment ETPZone, where ETPZone ∈ [60, 120] minutes; within the current temperature increase search segment, the average value of the overcurrent temperature increase characteristics of each type II climbing segment is recorded as the first threshold, and any moment that satisfies the overcurrent temperature increase characteristic being greater than the first threshold is defined as a type I threshold point; If the next time step of a threshold point of type I is not a threshold point of type I, it is defined as a threshold point of type II. Starting from the threshold point of type I, the time steps are traversed in reverse time order until the time step traversed does not belong to the threshold point of type I. The traversed time steps form a set as the abnormal event corresponding to the threshold point of type II. The number of time steps contained in the abnormal event is denoted as Dur, and the maximum value of the overcurrent temperature increase characteristic at each time step of the abnormal event is denoted as MS. Let the ratio of the maximum to the minimum current value at each time step under the abnormal event be the overflow weight ORWt, and calculate the abnormal state OHEff corresponding to the current time step: ;

[0024] Where max{} is the maximum value function, nERZ is the total number of anomalies, j1 is the accumulation variable, lg() is the logarithmic function with base 10, and OVRtj1 and DSWtj1 represent the overflow weight and position difference weight of the j1th anomaly searched in reverse time order starting from the current moment, respectively. The position difference weight is calculated as follows: ;

[0025] Where p is any positive real number, DsPvj1 is the time difference between the type II threshold point corresponding to the j1th abnormal event and the current time; the average value of the abnormal state corresponding to each time in the temperature increase search segment is the state level. If the abnormal state at the current time is greater than the state level, the threshold mode is assigned the value TRUE, otherwise it is assigned the value FALSE.

[0026] In another example, a time interval is set as the temperature increase search segment ETPZone, where ETPZone ∈ [60, 120] minutes; within the current temperature increase search segment, the sequence formed by the various overcurrent temperature increase features is used as the current characteristic monitoring sequence, and the time corresponding to each maximum value in the current characteristic monitoring sequence is used as the overcurrent characteristic time point; the current time is the default overcurrent characteristic time point and is defined as the current overcurrent characteristic time point; based on the location of the overcurrent characteristic time point, overcurrent characteristic segments are filtered from the temperature increase search segment: the difference between the current value at any time and the current value at the previous time is recorded as the point current increment, and the time when the current increment is less than the current increment threshold is defined as the increment depression point; The median of each current increment within the temperature increase search segment is used as the current increment threshold. If a moment is an increment depression and the corresponding temperature value has a minimum, the moment satisfying these two conditions is defined as a uniform time point. The time interval between any overcurrent characteristic time point and the first uniform time point obtained by searching in the reverse time direction is defined as an overcurrent characteristic segment. The overcurrent characteristic segment corresponding to the current overcurrent characteristic time point is specifically defined as the current overcurrent characteristic segment. The segment intercept is defined as the total number of moments within the overcurrent characteristic segment. The proportion of increment depressions within the overcurrent characteristic segment is denoted as the depression frequency HRt. The average value of the overcurrent temperature increase characteristics at each moment within the overcurrent characteristic segment is calculated and denoted as the segment order. ;

[0027] The overcurrent anomaly state OHEff at the current moment is calculated based on the depression frequency and the segment order value. ;

[0028] Where i1 is the sequence number of the current overcurrent segment, pv is the identifier of the current overcurrent segment, NOZ is the number of overcurrent segments within the temperature increase search segment, and NOZ-1 is used to ignore the current overcurrent segment; HRTi1 and These represent the low-point frequency and segment order value of the i1th overcurrent segment traversed in reverse time order from the current moment, respectively. i1 represents the current overcurrent segment order value, and i2 is the cumulative variable corresponding to the cumulative operation;

[0029] The minimum intercept among the intercepts of each flow segment is the standard intercept (STDs). The overcurrent abnormality state at each time point is constructed into a sequence. The average of the first STDs elements of the sequence is used as the calibration value of the overcurrent abnormality state at the current time point. The average of the sequence is used as the overcurrent abnormality state level. If the calibration value of the overcurrent abnormality state at the current time point is greater than the overcurrent abnormality state level, the threshold mode is assigned the value TRUE; otherwise, it is assigned the value FALSE.

[0030] Step S3: Control the breaking of the drop-out device according to the extensibility of the threshold mode; In one example, a positive integer is set as the extended interval KTms, Ktms∈[1,KOMin], the default value of KTms is 1, and KOMin is the frequency of reading the current value within one minute. If the threshold mode values ​​obtained at the current time and the previous KTms times are all TRUE, then the interruption operation is defined as allowed, that is, the drop-out interruption circuit is allowed; otherwise, the interruption operation is defined as not allowed, that is, the drop-out interruption circuit is temporarily not allowed.

[0031] An embodiment of this application also provides a control system for a drop-out interrupter, wherein the drop-out interrupter includes a data acquisition unit and a communication device, the data acquisition unit includes a temperature sensor and a current transformer, and the communication device is used for data communication. See Figure 2 The system can be used to implement the methods of the above embodiments, including: The data acquisition module is used to acquire temperature data and current data collected by the data acquisition device, and to obtain overcurrent temperature increase characteristics based on the temperature data and current data. A threshold mode determination module is used to determine the threshold mode based on the overcurrent temperature increase characteristics. The interruption control module is used to control the interruption of the drop-out interruption device based on the extensibility of the threshold mode.

[0032] An embodiment of this application also provides a drop-out interruptor control device, comprising: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it performs the steps of the drop-out interruptor control method described in the above embodiments.

[0033] Specifically, the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor. The processor is the control center of the operating system of the drop-out intelligent interruption control system for power system protection, connecting various parts of the operating system through various interfaces and lines.

[0034] The memory can be used to store the computer program and / or modules. The processor implements various functions of the drop-out intelligent switching control system for power system protection by running or executing the computer program and / or modules stored in the memory and calling the data stored in the memory. The memory may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created based on the use of the mobile phone (such as audio data, phonebook, etc.). In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, memory, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0035] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technological improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A control method for a drop-out type circuit breaker, characterized in that, The drop-out interrupter includes a data acquisition unit and a communication device. The data acquisition unit includes a temperature sensor and a current transformer, and the communication device is used for data communication. The method includes: The temperature and current data collected by the data acquisition device are obtained, and the overcurrent temperature increase characteristics are obtained based on the temperature and current data. Determine the threshold mode based on the overcurrent temperature increase characteristics; The drop-out interruption device is controlled to interrupt based on the extensibility of the threshold mode; The process of obtaining the overcurrent temperature increase characteristics based on the temperature and current data specifically includes: The overcurrent temperature increase characteristic is obtained by dividing the difference between the current value and the previous value by the difference between the current value and the temperature increase threshold. Alternatively, the overcurrent temperature increase characteristic can be calculated using the following formula. ; ； Where Crcv and Crcv' represent the current values ​​corresponding to the current time and the previous time, respectively; exp() is an exponential function with the natural constant e as the base; Crtp and Crtp' represent the temperature values ​​corresponding to the current time and the previous time, respectively; and Sgtp is the temperature increase threshold. The temperature increase threshold is obtained in the following way: Set a time interval as the temperature increase search segment ETPZone, where ETPZone ∈ [60, 120] minutes; The temperature values ​​corresponding to each time point in the previous time period ETPZone are processed by mean filtering and curve fitting is performed. The average value of the fitted curve is recorded as the first temperature value. Each sub-climbing segment is identified from the obtained fitted curve. A sub-climbing segment is the part of the fitted curve from any minimum value to the first maximum value obtained by searching along the time sequence. If the numerical range of a sub-climbing segment contains the first temperature value, the sub-climbing segment is defined as a type I climbing segment. If the minimum value in the numerical range of a sub-climbing segment is greater than the first temperature value, the sub-climbing segment is defined as a type II climbing segment. Calculate the average value of the set of each type of climbing segment and denote it as the temperature increase threshold Sgtp.

2. The method according to claim 1, characterized in that, The step of determining the threshold mode based on the overcurrent temperature increase characteristics specifically includes: Within the current temperature increase search segment, the average value of the overcurrent temperature increase characteristics of each type II climbing segment is recorded as the first threshold, and any moment that satisfies the overcurrent temperature increase characteristic being greater than the first threshold is defined as a type I threshold point; if the next moment of a type I threshold point is not a type I threshold point, it is defined as a type II threshold point, and each moment is traversed in reverse time order starting from the type I threshold point until the traversed moment does not belong to a type I threshold point, and the traversed moments form a set as the abnormal event corresponding to the type II threshold point; The ratio of the maximum to the minimum current value at each moment under the abnormal event is recorded as the overflow weight. The position difference weight is calculated based on the time difference between the second type of threshold point corresponding to the abnormal event and the current moment. The abnormal state corresponding to the current time is calculated based on the overflow weight and the position difference weight. The average value of the abnormal state corresponding to each time within the temperature increase search segment is recorded as the state level. If the abnormal state at the current moment is greater than the state level, then the threshold mode is assigned the value TRUE; otherwise, it is assigned the value FALSE.

3. The method according to claim 2, characterized in that, The step of determining the threshold mode based on the overcurrent temperature increase characteristics specifically includes: Set a time interval as the temperature increase search segment ETPZone, where ETPZone ∈ [60, 120] minutes; Within the current temperature increase search segment, the sequence formed by each overcurrent temperature increase feature is used as the flow sign monitoring sequence, and the time corresponding to each maximum value in the flow sign monitoring sequence is used as the overcurrent sign time point. Based on the location of the overcurrent sign time point, the overcurrent sign segment is selected from the temperature increase search segment. The difference between the current value at any time and the current value at the previous time is recorded as the current increment. The time when the current increment is less than the current increment threshold is defined as the increment trough. Among them, the median of each current increment in the temperature increase search segment is calculated as the current increment threshold. If a moment is an incremental depression and the temperature value at that moment is at a minimum, then the moment that satisfies both conditions is defined as a uniform time point. The time interval between any overcurrent sign point and the first uniform time point obtained by searching in the reverse time direction is taken as an overcurrent sign segment. The proportion of incremental depressions in the overcurrent sign segment is recorded as the depression frequency. The average value of the overcurrent temperature increase characteristics at each time point in the overcurrent sign segment is calculated and recorded as the sign segment order value. The overcurrent abnormal state at the current time is calculated based on the depression frequency and the sign segment order value. The minimum value among the intercepts of each overcurrent segment is the standard intercept STDs. The overcurrent abnormality state at each time point is constructed into a sequence. The average value of the first STDs elements of the sequence is used as the overcurrent abnormality state calibration value at the current time point, and the average value of the sequence is used as the overcurrent abnormality state level. If the current overcurrent anomaly state calibration value is greater than the overcurrent anomaly state level, then the threshold mode is assigned the value TRUE; otherwise, it is assigned the value FALSE.

4. The method according to claim 3, characterized in that, The step of controlling the interruption of the drop-out device based on the extensibility of the threshold mode specifically includes: Let a positive integer be defined as the extended interval KTms, KTms∈[1,KOMin], and KOMin is the frequency of reading the current value within one minute; If the threshold mode values ​​obtained at the current time and the previous KTms times are all TRUE, then the interruption operation is allowed to occur, that is, the drop-out interruptor is allowed to cut off the circuit; otherwise, the interruption operation is not allowed to occur, that is, the drop-out interruptor is temporarily not allowed to cut off the circuit.

5. A control system for a drop-out interrupter, characterized in that, The drop-out interrupter includes a data acquisition unit and a communication device. The data acquisition unit includes a temperature sensor and a current transformer, and the communication device is used for data communication. The system includes: The data acquisition module is used to acquire temperature data and current data collected by the data acquisition device, and to obtain overcurrent temperature increase characteristics based on the temperature data and current data. A threshold mode determination module is used to determine the threshold mode based on the overcurrent temperature increase characteristics. An interruption control module is used to control the interruption of the drop-out interruption device based on the extensibility of the threshold mode. The data acquisition module is specifically used to obtain the overcurrent temperature increase characteristic by using the ratio of the difference between the current value and the previous time to the difference between the current temperature value and the temperature increase threshold at the current time, or by calculating the overcurrent temperature increase characteristic according to the following formula. ; ； Where Crcv and Crcv' represent the current values ​​corresponding to the current time and the previous time, respectively; exp() is an exponential function with the natural constant e as the base; Crtp and Crtp' represent the temperature values ​​corresponding to the current time and the previous time, respectively; and Sgtp is the temperature increase threshold. The temperature increase threshold is obtained in the following way: Set a time interval as the temperature increase search segment ETPZone, where ETPZone ∈ [60, 120] minutes; The temperature values ​​corresponding to each time point in the previous time period ETPZone are processed by mean filtering and curve fitting is performed. The average value of the fitted curve is recorded as the first temperature value. Each sub-climbing segment is identified from the obtained fitted curve. A sub-climbing segment is the part of the fitted curve from any minimum value to the first maximum value obtained by searching along the time sequence. If the numerical range of a sub-climbing segment contains the first temperature value, the sub-climbing segment is defined as a type I climbing segment. If the minimum value in the numerical range of a sub-climbing segment is greater than the first temperature value, the sub-climbing segment is defined as a type II climbing segment. Calculate the average value of the set of each type of climbing segment and denote it as the temperature increase threshold Sgtp.

6. A control device for a drop-out interruptor, characterized in that, include: A processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the drop-out device control method according to any one of claims 1 to 4.

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