Method for optimizing arc extinguishing performance of alternating current contactor

Abstract

The invention discloses a method for optimizing the arc extinguishing performance of an alternating current contactor, relates to the technical field of electric power engineering and electrical control, and is used for solving the problem of insufficient judgment on a current control strategy under the scene of coexistence of multiple regulation and control strategies and complex load fluctuation. Dynamically determining an optimal regulation and control mode in combination with a control speed evaluation mechanism; multi-dimensional data library building of a regulation and control mode is achieved by setting marking time and a classification marking mechanism, an advanced joint control mode is recognized in combination with a joint control rule, and the self-adaptive capacity of a control strategy is improved; the sliding window is set to calculate the fluctuation rate of the control speed and regulate and control the electric energy, so that the stability and the energy efficiency performance of the regulation and control mode are comprehensively evaluated and dynamically sorted, and the accuracy of arc extinguishing response of the alternating current contactor is improved.

Description

Technical Field

[0001] The present invention relates to the technical fields of electric power engineering and electrical control technology. More specifically, the present invention relates to a method for optimizing the arc extinguishing performance of an AC contactor. Background Art

[0002] As the most commonly used power switch device in an electrical control system, an AC contactor is widely used in fields such as industrial automation, power systems, and intelligent buildings to achieve remote control and frequent on-off operations of high-power electrical loads. During the on-off process of the AC contactor, due to the voltage difference and the influence of inductive loads between the contact points, an arc phenomenon is extremely likely to occur. The arc not only causes ablation and welding of the contact material of the contactor, but may also trigger system short circuits, equipment failures, and even safety accidents.

[0003] The prior art has the following deficiencies: In the current implementation methods, the dynamic correlation between the regulation method and the actual arc extinguishing performance is not fully considered. Especially in scenarios where multiple regulation strategies coexist and complex load fluctuations occur, it is difficult to quickly and accurately determine whether the current control strategy is optimal, and it is also impossible to perform real-time evaluation and adaptive optimization of the arc extinguishing performance during the control process. Therefore, a method for optimizing the arc extinguishing performance of an AC contactor is proposed.

[0004] The above information disclosed in the background art section is only used to enhance the understanding of the background of the present disclosure. Therefore, it may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a method for optimizing the arc extinguishing performance of an AC contactor, which solves the problems raised in the above background art by applying a multi-dimensional control speed evaluation model, a dynamic screening mechanism for regulation strategies, and a performance statistics optimization method under a sliding window.

[0006] To achieve the above object, the present invention provides the following technical solution. A method for optimizing the arc extinguishing performance of an AC contactor includes: S1: Record the triggering time when the AC contactor is triggered for control within a period of time, detect the circuit current in real time and record the detection results, and obtain a preliminary evaluation result of the control speed based on the triggering time and the detection results; S2: Set a marking time, classify and mark different regulation methods of the AC contactor within the marking time and call the average control speed under the corresponding marked category, formulate an arc extinguishing threshold based on the average control speed under different regulation methods, and retain the regulation method corresponding to the average control speed; S3: Determine whether the reserved control method belongs to the advanced interlock mode through the interlock rule, include the advanced interlock mode in the record library, access the current control log to determine the current control method, compare the preliminary evaluation result of the control speed under the current control method with each control method in the record library, update the preliminary evaluation result of the control speed under the corresponding control method, and select the control method for the next AC contactor trigger control; S4: Set a sliding window, count the speed change difference between each control method and the same control mode in the record library, calculate the control volatility of the corresponding control method, and update the sorting of each control method in the record library in combination with the control electric energy of each control method.

[0007] In a preferred embodiment, when the control carrier detects that the trigger condition is established, it calls the system clock function to generate the current timestamp to obtain the trigger time; By establishing a current sampling channel, collecting and digitizing the analog voltage signal, and calculating according to the sampling signal, the static bias voltage of the sensor, and the sensitivity, the circuit current is obtained; Compare the circuit current with the preset regulated current. If the circuit current is less than the regulated current, it means that the load circuit has entered the low current range, and the current arc extinguishing operation can be performed; retain that the circuit current is less than the regulated current to determine the detection result; Standardize the trigger time and the circuit current, and substitute them into the control speed evaluation model to preliminarily evaluate the control speed and determine the control speed.

[0008] In a preferred embodiment, different control methods of the AC contactor are set, and the control methods include single control methods or multiple control methods, and the control method recorded each time the control is triggered is used as the classification basis; Call and record the classified control methods within the set marking time. If a call is made, mark it to obtain the marked control method; Determine the control speed through the trigger time and the circuit current for the marked control method, and count all the control speeds within the set marking time, and calculate the average value of the control speeds to obtain the average control speed under different control methods.

[0009] In a preferred embodiment, the average control speeds under different control methods are statistically analyzed, and the median of the average control speeds corresponding to each control method is taken as the arc extinguishing threshold; Retain the control methods corresponding to the average control speeds less than or equal to the arc extinguishing threshold.

[0010] In a preferred embodiment, the interlock rule is to identify whether multiple control methods are included in the current control method; If the current regulation mode contains multiple regulation methods, it is determined as the advanced interlocking control mode and included in the record library. If there is only one regulation method in the current regulation mode, skip the process; Obtain the preliminary evaluation result of the control speed under the current regulation mode, call each regulation mode in the record library, compare the current regulation mode with the regulation methods in each regulation mode in the record library, query the regulation mode in the record library that is consistent with the regulation method in the current regulation mode, and update the control speed of the regulation mode.

[0011] In a preferred embodiment, compare the control speed corresponding to the regulation mode in the record library that is consistent with the regulation method in the current regulation mode with the control speed of the current regulation mode. If the control speed of the current regulation mode is better than that of the same type in the record library, overwrite the control speed of this type in the record library. Otherwise, retain the original record and select the maximum control speed in the record library as the regulation mode for the next AC contactor trigger control.

[0012] In a preferred embodiment, use the record library to count the speed change difference between each regulation mode and the same regulation mode in the record library each time; Extract the control speed data of the continuously recorded regulation modes within the set sliding window, and determine the regulation volatility of the regulation mode by calculating the average control speed and the standard deviation; Collect the real-time voltage and current data in the AC contactor control loop, pair and record them in time series, and obtain the regulation electric energy of each regulation mode through numerical integration of the voltage and current data within the sliding window.

[0013] In a preferred embodiment, standardize the regulation volatility of the regulation mode and the regulation electric energy of each regulation mode, and substitute them into the beta activation model to determine the arrangement update coefficient for each regulation mode in the record library.

[0014] In a preferred embodiment, the implementation steps of the beta activation model are as follows: construct two core parameters of the beta distribution function and set the activation function; Then calculate the beta activation value to obtain the arrangement update coefficient for each regulation mode in the record library.

[0015] In a preferred embodiment, sort the arrangement update coefficients for each regulation mode in the record library from largest to smallest and substitute them into the record library update.

[0016] The technical effects and advantages of the present invention: 1. The present invention dynamically determines the optimal regulation method by monitoring and standardizing the trigger time and current signal in real time and combining with the control speed evaluation mechanism; realizes the multi-dimensional data base building of the regulation method through setting the marking time and classification marking mechanism, and combines the joint control rules to identify the advanced joint control mode, so as to improve the adaptive ability of the control strategy; realizes the comprehensive evaluation and dynamic ranking of the stability and energy efficiency performance of the regulation method by setting the sliding window to calculate the control speed volatility and regulated electric energy, thereby improving the accuracy, stability and energy efficiency level of the arc extinguishing response of the AC contactor, and having the technical advantages of intelligent regulation, continuous optimization and fast control. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a method flow chart of a method for optimizing the arc extinguishing performance of an AC contactor according to the present invention.

[0018] Figure 2 It is a detailed view of step S1 of a method for optimizing the arc extinguishing performance of an AC contactor according to the present invention.

[0019] Figure 3 It is a detailed view of step S2 of a method for optimizing the arc extinguishing performance of an AC contactor according to the present invention.

[0020] Figure 4 It is a detailed view of step S3 of a method for optimizing the arc extinguishing performance of an AC contactor according to the present invention.

[0021] Figure 5 It is a detailed view of step S4 of a method for optimizing the arc extinguishing performance of an AC contactor according to the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Embodiment 1 Please refer to Figure 1 , a method for optimizing the arc extinguishing performance of an AC contactor, and the specific operation process is as follows: S1: As Figure 2 shown, record the trigger time when the AC contactor is triggered and controlled within a period of time, detect the circuit current in real time and record the detection result, and obtain the preliminary evaluation result of the control speed according to the trigger time and the detection result; In this embodiment, the AC contactor trigger control refers to the control system applying a control voltage to the AC contactor coil to attract its internal electromagnetic system, thereby driving the main contacts to close or open, thereby forming an effective load connection or disconnection action; Specifically, the auxiliary contacts (such as NO or NC) of the AC contactor itself are used as state detection feedback. When the contact state changes (open to closed or closed to open), it is used as the signal basis for the contactor response trigger. In conjunction with the control system timestamp, the triggering behavior can be accurately recorded. The trigger time is defined as the time stamp when the control system issues the contactor trigger control command, which is usually recorded with millisecond (ms) accuracy. This time is used to evaluate indicators such as control response speed, action time, and arc extinguishing delay; Specifically, the logic for obtaining the trigger time is to call the system clock function to generate the current timestamp and obtain the trigger time when the control carrier detects that the trigger condition is met; Among them, the control carrier detects that the trigger condition is met, including but not limited to the control signal output or the auxiliary contact change, which will not be elaborated here; Optionally, the change of auxiliary contacts can be used as the interrupt source. When the interrupt is triggered, the system automatically records the current system clock count value. Furthermore, if the contactor control is coordinated by multiple devices (such as master control + execution end), a communication protocol (such as CAN, Modbus, 485) is required to synchronize the points. The trigger event is recorded by the master control with a unified timestamp and broadcasted. Among them, real-time current detection refers to continuously sampling the current value flowing through the load circuit at a high frequency during the contactor's on-off operation to obtain a complete current change curve, thereby judging the load pickup state, whether the current is lower than the set threshold, whether there is an arc abnormality, etc.; The logic of obtaining the circuit current is to establish a current sampling channel, collect the analog voltage signal and digitize it, and calculate the circuit current based on the sampling signal and the static bias voltage and sensitivity of the sensor; Specifically, the calculation formula based on the sampling signal and the static bias voltage and sensitivity of the sensor is as follows: ; In the formula, is the current value corresponding to the sampling time, At the sampling time The collected analog voltage signal, is the zero-point voltage of the Hall sensor, is the current sensitivity coefficient; Further, a total number of sampling moments is set to T, where t is the tth sampling moment; Optionally, the static zero - point voltage and current sensitivity coefficient of the current sensor are obtained by the experimenter according to the specific model parameter manual and measured calibration data. For example, Hall current sensors (such as ACS758), etc., are not elaborated here; Compare the circuit current with the preset regulated current. If the circuit current is greater than or equal to the regulated current, it indicates that the main circuit is still in the on - state and the load current has not decreased, so keep waiting and do not perform arc - extinguishing control for the time being. If the circuit current is less than the regulated current, it indicates that the load circuit has entered the low - current range, and arc - extinguishing operation can be performed currently; Keep the fact that the circuit current is less than the regulated current to determine the detection result; Among them, the detection result includes the circuit current less than the regulated current; Standardize the trigger time and the circuit current, substitute them into the control speed evaluation model to preliminarily evaluate the control speed, and determine the control speed; Among them, the preliminary evaluation is that the experimenter preferentially selects a period of time as the analysis time for the preliminary evaluation when the AC contactor is triggered and controlled. The specific length of the analysis time is not limited and is not elaborated here; It should be noted that the methods of standardization include, but are not limited to, standard linear transformation based on interval scaling, Z - Score standardization method based on statistics, or normalization method based on non - linear mapping function. The application methods of standardization are not elaborated here; Among them, the control speed evaluation model is a calculation model used to perform mapping analysis on the input parameters (such as the AC contactor trigger time and current change characteristics) after standardization, so as to evaluate the control response speed under specific regulation methods. This model is constructed based on single - or multi - variable regression, and usually regards the control speed as a weighted linear combination of each influencing factor (that is, the standardization results of the trigger time and the circuit current); S2: As Figure 3 shown, set the marking time, classify and mark different regulation methods of the AC contactor within the marking time, and call the average control speed under the corresponding marking category. Set the arc - extinguishing threshold according to the average control speed under different regulation methods and retain the regulation method corresponding to the average control speed; Set the marking time, which is a continuous acquisition period used to summarize the regulation behaviors of the AC contactor triggered during this time period; The specific marking time can be set by the experimenter through empirical debugging and data statistical analysis. For example: under conditions of intensive regulation or large load changes, the marking time can be set to 3600 seconds (i.e., 1 hour) to obtain sufficient samples; under light - load or timed - operation conditions, the marking time can also be set to 120 minutes or other cycles. The marking time window is not a limiting condition of the present invention and is not elaborated here; Set different regulation modes for the AC contactor. The regulation modes include single regulation methods or multiple regulation methods, and use the regulation mode recorded each time the control is triggered as the classification basis; Specifically, the regulation methods such as voltage regulation type, current limiting type, and tripping slow release type are used as the classification basis. Among them, the voltage regulation type means that by controlling the on-off rhythm of the main circuit voltage of the contactor, the arc voltage or the circuit voltage during the arc extinguishing stage is quickly reduced, thereby reducing the current rising speed and promoting the natural extinction of the arc. This method relies on a controllable power supply or a series voltage regulation module to achieve dynamic down-regulation control of the output voltage, and is applicable to medium inductive or resistive load scenarios that allow short-term voltage fluctuations; The current limiting type means that after the AC contactor is closed, the current rising rate and amplitude in the circuit are limited by a series of current limiting elements (such as fast response reactors, semiconductor current limiting modules, etc.), thereby suppressing the release of high arc energy and achieving the purpose of assisting arc extinguishing. It is widely used in high-current inductive loads, such as motor starting and reactor switching scenarios; The tripping slow release type means that when it is detected that the main contact of the contactor is in a high arc risk interval, a tripping command is quickly triggered, and at the same time, a short-delay slow release logic (such as a pre-release mechanism) is coordinated to achieve early disconnection of the control device at the initial stage of current decline, reducing the arc extinguishing pressure, and is suitable for precision control carriers with high-frequency triggering but intolerant of long-term arcs; It should be noted that the regulation methods are not limited to the voltage regulation type, current limiting type, and tripping slow release type in the above content, but also include the following regulation strategy types: pulse intermittent type, voltage drop feedback type, phase delay type, etc., which will not be elaborated here; Record the classified regulation modes within the set marking time. If a call is made, a mark is made to obtain the marked regulation mode; Among them, a call means that within the marked time, the AC contactor references and actually applies the control parameters and execution logic corresponding to the regulation mode during the control execution process, that is, a real control behavior occurs and has an actual intervention effect on the current or voltage waveform. For example: the control system enables the "current limiting type" strategy for a certain contactor closing action and executes the current limiting response curve, adopts the "tripping slow release type" delayed release logic in the contactor tripping control or enables the voltage rapid adjustment module corresponding to the "voltage regulation type"; Determine the control speed based on the trigger time and the circuit current for the marked regulation mode, and count all the control speeds within the set marking time. Calculate the average value of the control speeds to obtain the average control speed under different regulation modes; It should be noted that calculating the control speed based on the trigger time and the circuit current is the content already described in the above embodiments and will not be elaborated here; Statistically analyze the average control speeds under different regulation modes, and take the median of the average control speeds corresponding to each regulation mode as the arc extinguishing threshold; Retain the regulation method corresponding to the average control speed less than or equal to the arc extinguishing threshold; It should be noted that the arc extinguishing threshold is not preset by those skilled in the art, but is set according to different regulation methods after the AC contactor is triggered and controlled in different rounds, which will not be elaborated here; S3: As Figure 4 shown, access the control log of the current control, determine the screened regulation method and judge whether it belongs to the advanced joint control mode through the joint control rule, include the advanced joint control mode in the record library, record the preliminary evaluation result of the control speed under the current regulation method and compare it with each regulation method in the record library, update the preliminary evaluation result of the control speed under the corresponding regulation method and select the regulation method for the next AC contactor trigger control; Access the control log record corresponding to the current AC contactor control event. Specifically, the control log includes: the trigger timestamp of the current control cycle, the remaining regulation methods, the actual current sampling curve and the evaluated current value, and the preliminary evaluation result of the control speed; Among them, the joint control rule refers to identifying whether there are multiple regulation methods in the current regulation method according to the combination of control strategies, trigger conditions, historical behaviors, and system configuration status within the AC contactor control cycle; If there are multiple regulation methods in the current regulation method, it is judged as the advanced joint control mode and included in the record library. If there is only one regulation method in the current regulation method, skip it; It should be noted that the regulation method has been described in the above embodiments and will not be elaborated here; Obtain the preliminary evaluation result of the control speed under the current regulation method, call each regulation method in the record library, compare the current regulation method with the regulation methods in each regulation method in the record library, query the regulation method in the record library that is consistent with the regulation method in the current regulation method, and update the control speed of the regulation method; Compare the control speed corresponding to the regulation method in the record library that is consistent with the regulation method in the current regulation method with the control speed of the current regulation method. If the control speed of the current regulation method is better than that of the same type in the record library, overwrite the control speed of this type in the record library. Otherwise, retain the original record and select the maximum control speed in the record library as the regulation method for the next AC contactor trigger control; For example, if the control speed of the current regulation method is 0.345 and the control speed corresponding to the regulation method in the record library that is consistent with the regulation method in the current regulation method is 0.343, then the current regulation method overwrites the regulation method in the record library that is consistent with the regulation method in the current regulation method, and uses the control speed of the current regulation method as the regulation method for the next AC contactor trigger control; S4: As Figure 5As shown, a sliding window is set to statistically analyze the speed change difference between each control method and the same control mode in the record library, calculate the control volatility of the corresponding control method, and update the sorting of each control method in the record library by combining the control electric energy of each control method; A sliding window refers to a fixed-range interval that continuously moves forward on the time axis or sample sequence, used to extract the latest limited data segment from a continuous data stream or historical record sequence for real-time statistics and analysis; Statistically analyze the speed change difference between each control method and the same control mode in the record library through the record library; The control volatility of a control method refers to statistically analyzing the control speed change difference of the current control method within the set sliding window range to measure the performance stability of the control method in multiple control cycles. Its acquisition logic is to extract the control speed data of the continuously recorded control method within the set sliding window, and determine the control volatility of the control method by calculating the average control speed and standard deviation; Specifically, the calculation of the control volatility is based on the coefficient of variation formula, and the expression is: ; In the formula, is the control volatility of the control method, is the standard deviation of the control speed within the sliding window, is the average control speed of the control method within the sliding window; The control electric energy of each control method is the total electric energy consumed or transmitted under a specific control method within the sliding window, used to reflect the energy consumption performance and efficiency characteristics of the control method during actual operation. Its acquisition logic is to collect the real-time voltage and current data in the control circuit of the AC contactor, pair and record them according to the time series, and obtain the control electric energy of each control method through numerical integration of the voltage and current data within the sliding window; Specifically, the discrete integral calculation formula is expressed as follows: ; In the formula, is the control electric energy of each control method, is the voltage value at the th sampling moment within the sliding window, is the current value at the th sampling moment within the sliding window, is the sampling interval time within the sliding window, is the total number of effective sampling points within the sliding window, where, is the th sampling moment within the sliding window; It should be noted that the duration selection within the sliding window is determined by the experimenter based on the analysis of the system response characteristics and the statistical results of dynamic data under typical working conditions, aiming to balance the data coverage range and real-time requirements. Further, the selection of the sampling interval time within the sliding window is also comprehensively obtained by the experimenter through the evaluation of the sampling accuracy and the matching analysis of the hardware data processing ability to ensure the regulation speed and the integrity and accuracy requirements of the electrical energy characteristic data. This will not be elaborated here; Standardize the regulation volatility of the regulation methods and the regulated electrical energy of each regulation method, and substitute them into the beta activation model to determine the arrangement update coefficients for each regulation method in the record library; Among them, the beta activation model constructs an activation function based on the beta distribution probability weight model, simulates the probability activation path of the control behavior, has the ability of "threshold adjustment + non-linear normalization", conducts "trust accumulation" on the historical performance of the regulation methods, and supports the strategy activation mechanism for the selection of regulation methods. It is very suitable for complex joint control and multi-strategy optimization; The implementation steps of the beta activation model are as follows: Construct two core parameters of the beta distribution function. Let the activation function: the control volatility (the lower the value, the better) corresponds to the use of the parameter , and the control energy efficiency (the higher the value, the better) corresponds to the use of the parameter ; Define the two mapping parameters of each regulation method as follows: , ; Among them, and are the weight amplification parameters, which can adjust and control the preference tendency of the beta activation model; Calculate the beta activation value: ; Among them, is the arrangement update coefficient for each regulation method in the record library. The larger the arrangement update coefficient for each regulation method in the record library, the higher the priority; Sort the arrangement update coefficients for each regulation method in the record library from largest to smallest, and substitute them into the record library for update; The above formulas are all dimensionless and take their numerical calculations. The formulas are obtained by collecting a large amount of data for software simulation to get a formula closest to the real situation. The preset parameters in the formulas are set by those skilled in the art according to the actual situation.

[0024] The above embodiments can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire or wirelessly (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more collections of available media. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media. The semiconductor media can be a solid-state drive.

[0025] It should be understood that in various embodiments of the present application, the magnitudes of the serial numbers of the above processes do not imply the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0026] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. A professional technician can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0027] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be described herein again.

[0028] In several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways; For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the couplings or direct couplings or communication connections shown or discussed among each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical or other forms.

[0029] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0030] In addition, in each embodiment of the present application, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0031] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs that can store program codes.

[0032] As described above, the above are only the specific implementation manners of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, and all should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for optimizing arc extinguishing performance of an AC contactor, characterized in that: include: S1: Record the triggering time of the AC contactor during triggering control over a period of time, detect the circuit current in real time and record the detection results, and obtain the preliminary evaluation results of the control speed based on the triggering time and the detection results; S2: Set the marking time, classify and mark the different control modes of the AC contactor within the marking time, and call the control speed average under the corresponding marking category. According to the control speed average under different control modes, the arc extinguishing threshold is formulated and the control mode corresponding to the control speed average is retained; S3: The retained control mode is judged through the joint control rules whether it belongs to the advanced joint control mode, the advanced joint control mode is included in the record library, the current control log is accessed to determine the current control mode, the control speed preliminary evaluation result under the current control mode is compared with each control mode in the record library, the control speed preliminary evaluation result under the corresponding control mode is updated, and the control mode is selected for the next AC contactor trigger control; S4: Set a sliding window, count the speed change difference between each control mode and the same control mode in the record library, calculate the control fluctuation rate of the corresponding control mode, and sort and update each control mode in the record library based on the control power of each control mode.

2. The method for optimizing arc extinguishing performance of an AC contactor according to claim 1, characterized in that: When the control carrier detects that the trigger condition is met, it calls the system clock function to generate the current timestamp and obtain the trigger time; By establishing a current sampling channel, collecting analog voltage signals and digitizing them, the circuit current is obtained by calculating the sampling signal and the static bias voltage and sensitivity of the sensor; The circuit current is compared with the preset control current. If the circuit current is less than the control current, it means that the load circuit has entered the low current range, and the arc extinguishing operation can be performed at present; if the circuit current is less than the control current, it is retained to determine the detection result; The trigger time and circuit current are standardized and substituted into the control speed evaluation model to make a preliminary evaluation of the control speed and determine the control speed.

3. The method for optimizing arc extinguishing performance of an AC contactor according to claim 1, characterized in that: Set different control modes for the AC contactor, including a single control method or multiple control methods, and use the control method recorded each time the control is triggered as the basis for classification; The classification control method is called and recorded within the set marking time, and if it is called, it is marked to obtain the marked control method; The control speed is determined by the trigger time and the circuit current in the marking control mode, and all control speeds within the set marking time are counted, and the control speeds are averaged to obtain the average control speeds under different control modes.

4. The method for optimizing arc extinguishing performance of an AC contactor according to claim 3, characterized in that: The control speed means under different control modes are counted, and the median of the control speed means corresponding to each control mode is taken as the arc extinguishing threshold; The control mode corresponding to the control speed mean value less than or equal to the arc extinguishing threshold is retained.

5. The method for optimizing arc extinguishing performance of an AC contactor according to claim 4, characterized in that: The joint control rule is to identify whether the current control method contains multiple control methods; If the current control mode contains multiple control methods, it is judged as advanced joint control mode and included in the record library. If the current control mode contains only one control method, it is skipped. Get the preliminary evaluation result of the control speed under the current control mode, call each control mode in the record library, and compare the current control mode with the control methods in each control mode in the record library, query the control mode in the record library that is consistent with the control method in the current control mode, and update the control mode control speed.

6. The method for optimizing arc extinguishing performance of an AC contactor according to claim 5, characterized in that: The control speed corresponding to the control method in the record library that is consistent with the control method in the current control method is compared with the control speed of the current control method. If the control speed of the current control method is better than the same method in the record library, the control speed of this type of method in the record library is overwritten. Otherwise, the original record is retained and the maximum control speed in the record library is selected as the control method for the next AC contactor trigger control.

7. The method for optimizing arc extinguishing performance of an AC contactor according to claim 6, characterized in that: The speed change difference between each control mode and the same control mode in the record library is counted through the record library; Extract the continuously recorded control speed data of the control mode within the set sliding window, and determine the control volatility of the control mode by calculating the average control speed and standard deviation; The real-time voltage and current data in the AC contactor control circuit are collected and recorded in pairs in time series. The regulated electric energy of each regulation mode is obtained by numerically integrating the voltage and current data in the sliding window.

8. The method for optimizing arc extinguishing performance of an AC contactor according to claim 7, characterized in that: The control volatility of the control mode and the control electric energy of each control mode are standardized and substituted into the beta activation model to determine the arrangement update coefficient of each control mode in the record library.

9. The method for optimizing arc extinguishing performance of an AC contactor according to claim 8, characterized in that: The steps to implement the Beta activation model are as follows: construct the two core parameters of the Beta distribution function and set the activation function; Then calculate the beta activation value to obtain the arrangement update coefficient of each control method in the record library.

10. The method for optimizing arc extinguishing performance of an AC contactor according to claim 9, characterized in that: The update coefficients of the arrangement of each control method in the record library are sorted from large to small, and substituted into the record library for updating.

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