A method and device for monitoring the sticking state of a spring energy storage type load switch

Abstract

The application discloses a kind of jam state monitoring method and device of spring energy storage type load switch, to solve the technical problem that the monitoring effect of the jam state of existing spring energy storage type load switch is poor.Method includes using preset data extraction criterion to extract target time signal according to the obtained multiple voltage and current signals, determine composite switch closing action time and multiple target voltage and current signals;Based on the motor type of driving motor, multiple target voltage and current signals are preprocessed using preset positive direction peak value extraction rule to generate parameter information set;Based on preset time determination rule, use parameter information set to divide composite switch closing action time, determine motor start time, motor running time, spring energy storage time, and combine preset jam state diagnosis rule to monitor jam state according to parameter information set, generate jam state monitoring result.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to a method and device for monitoring the jamming state of a spring-loaded energy storage switch. Background Technology

[0002] Spring-load-storage load switches are switching devices that combine mechanical energy storage with rapid opening and closing functions. They are mainly used for interrupting and isolating load currents in medium-voltage power distribution networks. Their core technology involves storing mechanical energy through a pre-compressed spring mechanism, which is rapidly released during operation to drive the contacts, achieving millisecond-level opening and closing. This results in advantages such as reliable operation, long lifespan, and maintenance-free operation.

[0003] Load switches in switchgear are used to break loads and short-circuit currents, and they generally adopt a spring-energy-storage structure. However, because this structure involves motors, reduction gears, and spring mechanisms, improper maintenance can easily lead to jamming of the load switch in practical applications, which will directly affect the reliable operation of the load switch.

[0004] Existing methods for monitoring the jamming state of spring-loaded load switches generally employ current monitoring to diagnose and assess the jamming condition, primarily relying on analyzing the waveform characteristics of the operating coil current to indirectly determine the mechanical state. However, these methods have significant technical limitations: under complex operating conditions, the current signal is susceptible to electromagnetic interference and load fluctuations, making multi-waveform processing difficult and resulting in poor monitoring performance of the jamming state of spring-loaded load switches. Summary of the Invention

[0005] This invention provides a method and apparatus for monitoring the jamming state of a spring-loaded energy storage switch, which solves the technical problem that existing methods for monitoring the jamming state of spring-loaded energy storage switches generally use current monitoring to diagnose and evaluate the jamming state, resulting in poor monitoring performance of the jamming state of the spring-loaded energy storage switch.

[0006] The first aspect of this invention provides a method for monitoring the jamming state of a spring-loaded load switch, comprising:

[0007] Multiple voltage and current signals of the drive motor in the spring energy storage load switch are acquired, and target time signals are extracted based on the multiple voltage and current signals using preset data extraction criteria to determine the closing action time of the composite switch and multiple target voltage and current signals.

[0008] Based on the motor type of the drive motor, a preset positive peak extraction rule is used to preprocess multiple target voltage and current signals to generate a parameter information set;

[0009] Based on the preset timing determination rules, the closing action time of the composite switch is divided using the parameter information set to determine the motor start time, motor running time, and spring energy storage time.

[0010] Based on the motor start-up time, the motor running time, the spring energy storage time, and the composite switch closing action time, a pre-set jamming state diagnosis rule is used to monitor the jamming state according to the parameter information set, and a jamming state monitoring result is generated.

[0011] Optionally, the closing action time of the composite switch includes the start time of the composite switch closing state and the stop time of the composite switch closing state; the step of using preset data extraction criteria to extract target time signals based on multiple voltage and current signals to determine the closing action time of the composite switch and multiple target voltage and current signals includes:

[0012] Filter the multiple voltage and current signals to determine multiple intermediate voltage and current signals;

[0013] Compare the times corresponding to each of the intermediate voltage and current signals to determine the maximum and minimum times;

[0014] The start and end times of the composite switch closing state are determined by iterating the start and end times based on the maximum time and the minimum time using preset data extraction criteria.

[0015] Extract the intermediate voltage and current signal between the start time of the closing state of the composite switch and the stop time of the closing state of the composite switch, and use it as the target voltage and current signal.

[0016] Optionally, based on the motor type of the drive motor, a preset positive peak extraction rule is used to preprocess multiple target voltage and current signals to generate a parameter information set, including:

[0017] Each of the target voltage and current signals is subjected to low-pass filtering to generate multiple low-pass filtered voltage and current signals.

[0018] When the type of the drive motor is a DC motor, the equivalent power signal corresponding to each low-pass filter voltage and current signal is calculated based on each low-pass filter voltage and current signal.

[0019] A parameter information set is constructed by using the low-pass filtered current signal from the multiple low-pass filtered voltage and current signals and the multiple equivalent power signals;

[0020] When the type of the drive motor is an AC motor, the voltage and current peak values ​​are extracted based on multiple low-pass filtered voltage and current signals using a preset positive peak extraction rule, and multiple voltage and current peak values ​​are determined.

[0021] Calculate the equivalent power signal corresponding to each voltage and current peak value based on the peak values ​​of each voltage and current and the time corresponding to each peak value of each voltage and current.

[0022] A parameter information set is constructed using the peak current value from multiple voltage and current peak values ​​and multiple equivalent power signals.

[0023] Optionally, the preset time determination rule includes a first time determination rule, a second time determination rule, and a third time determination rule; the step of dividing the closing action time of the composite switch using the parameter information set based on the preset time determination rule to determine the motor start-up time, motor running time, and spring energy storage time includes:

[0024] Determine whether multiple current values ​​in the parameter information set satisfy the first time determination rule, the second time determination rule, and the third time determination rule;

[0025] The motor start time is determined based on the start time of the closing state of the composite switch and the time corresponding to the current value that satisfies the first time determination rule.

[0026] The motor running time and spring energy storage time are determined based on the time corresponding to the current value that satisfies the first time determination rule, the time corresponding to the current value that satisfies the second time determination rule, and the time corresponding to the current value that satisfies the third time determination rule.

[0027] Optionally, the jamming state monitoring results include a first jamming state monitoring result, a second jamming state monitoring result, and a third jamming state monitoring result; the preset jamming state diagnostic rules include current jamming state diagnostic criteria and power jamming state diagnostic criteria; the process of monitoring the jamming state based on the motor start-up time, the motor running time, the spring energy storage time, and the composite switch closing action time, using the preset jamming state diagnostic rules according to the parameter information set, and generating jamming state monitoring results, includes:

[0028] Based on the motor running time and the spring energy storage time, determine whether multiple current values ​​in the parameter information set meet the diagnostic criteria for current jamming state.

[0029] If the condition is met, the first jamming state monitoring result determines that the spring-energy-storage load switch is jammed.

[0030] If the conditions are not met, the power jamming state diagnostic criteria are used to monitor the motor start-up time, the motor running time, the spring energy storage time, the composite switch closing action time, and the parameter information set to generate a second jamming state monitoring result and a third jamming state monitoring result.

[0031] Optionally, the power jamming state diagnostic criteria include a first power criterion, a second power criterion, a third power criterion, and a fourth power criterion; the power jamming state diagnostic criteria are used to monitor the motor start-up time, the motor running time, the spring energy storage time, the composite switch closing action time, and the parameter information set to generate a second jamming state monitoring result and a third jamming state monitoring result, including:

[0032] Based on the motor start-up time, the motor running time, the spring energy storage time, and the composite switch closing action time, power values ​​are extracted from the parameter information set, and multiple power values ​​corresponding to the motor start-up time, the motor running time, the spring energy storage time, and the composite switch closing action time are output.

[0033] The weighted average values ​​corresponding to the motor start time, the motor running time, the spring energy storage time, and the composite switch closing time are calculated and output as follows:

[0034] Determine whether the weighted average power value corresponding to the closing action time of the composite switch meets the first power criterion;

[0035] If the condition is not met, the second jamming state monitoring result determines that the spring-energy-storage load switch is not jammed.

[0036] If satisfied, then based on the multiple power values ​​corresponding to the motor running time and the weighted average power value corresponding to the motor running time, calculate the target power criterion value and the power difference corresponding to each power value corresponding to the motor running time.

[0037] Compare the absolute values ​​of the various power differences corresponding to the motor running time with the target power criterion value;

[0038] The absolute value associated with the power difference corresponding to any motor running time that is less than or equal to the target power criterion value is taken as the target power value, and the target weighted average power value corresponding to the motor running time is calculated based on the target power value corresponding to the motor running time.

[0039] Determine whether the weighted average power corresponding to the motor start-up time and the target weighted average power corresponding to the motor running time satisfy the second power criterion;

[0040] If the condition is not met, the second jamming state monitoring result determines that the drive motor in the spring energy storage load switch is not jammed, but the reduction device is jammed.

[0041] If satisfied, then determine whether the weighted average power value corresponding to the motor running time and the weighted average power value corresponding to the motor start time satisfy the third power criterion;

[0042] If the conditions are not met, the second jamming state monitoring result determines that the drive motor in the spring-energy storage load switch is jammed, while the reduction gear is not jammed.

[0043] If the conditions are met, the second jamming state monitoring result is determined to be that the drive motor and the reduction gear in the spring energy storage load switch are jammed.

[0044] Determine whether the weighted average power value corresponding to the spring energy storage time satisfies the fourth power criterion;

[0045] If the condition is met, the third jamming state monitoring result is determined to be that the energy storage spring in the spring-type energy storage load switch is jammed.

[0046] If the condition is not met, the third jamming state monitoring result determines that the energy storage spring in the spring-type energy storage load switch is not jammed.

[0047] The second aspect of the present invention provides a jamming state monitoring device for a spring-loaded load switch, comprising:

[0048] The acquisition module is used to acquire multiple voltage and current signals of the drive motor in the spring energy storage load switch, and to extract target time signals based on the multiple voltage and current signals using preset data extraction criteria, thereby determining the closing action time of the composite switch and the multiple target voltage and current signals.

[0049] The preprocessing module is used to preprocess multiple target voltage and current signals based on the motor type of the drive motor and using a preset positive peak extraction rule to generate a parameter information set;

[0050] The segmentation module is used to segment the closing action time of the composite switch based on the preset time determination rules and the parameter information set, and to determine the motor start time, motor running time, and spring energy storage time.

[0051] The monitoring module is used to monitor the jamming state based on the motor start-up time, the motor running time, the spring energy storage time, and the composite switch closing action time, using preset jamming state diagnosis rules and the parameter information set, and generate jamming state monitoring results.

[0052] A computer device provided in a third aspect of the present invention includes a memory and a processor. The memory stores a computer program, and when the computer program is executed by the processor, the processor performs the steps of the method for monitoring the jamming state of a spring-loaded energy storage switch as described in any of the preceding claims.

[0053] The fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed, implements the steps of the method for monitoring the jamming state of a spring-loaded energy storage switch as described in any of the preceding claims.

[0054] The fifth aspect of the present invention provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, wherein, when the program instructions are executed by a computer, the computer performs the steps of the method for monitoring the jamming state of a spring-loaded energy storage switch as described in any of the preceding claims.

[0055] As can be seen from the above technical solutions, the present invention has the following advantages:

[0056] The above-mentioned technical solution of the present invention provides a method for monitoring the jamming state of a spring-energy-storage load switch. This method acquires multiple voltage and current signals from the drive motor in the spring-energy-storage load switch, and uses preset data extraction criteria to extract target time signals from these signals to determine the closing action time of the composite switch and multiple target voltage and current signals. Based on the motor type of the drive motor, a preset positive peak extraction rule is used to preprocess the multiple target voltage and current signals to generate a parameter information set. Based on a preset time determination rule, the closing action time of the composite switch is divided using the parameter information set to determine the motor start-up time, motor running time, and spring energy storage time. Based on the motor start-up time, motor running time, spring energy storage time, and composite switch closing action time, a preset jamming state diagnosis rule is used to monitor the jamming state according to the parameter information set, generating a jamming state monitoring result. Based on the above scheme, the target time signal is extracted from multiple voltage and current signals by using preset data extraction criteria to determine the closing action time of the composite switch and multiple target voltage and current signals. The closing action time of the composite switch and multiple target voltage and current signals are then processed in conjunction with the motor type of the drive motor, preset time judgment rules, and preset jamming state diagnosis rules to output the jamming state monitoring results. This invention, combined with effective data extraction criteria, can realize the rapid extraction of the closing current and voltage signals of the load switch, thereby achieving rapid and effective identification of the jamming state and improving the monitoring effect of the jamming state of the spring energy storage load switch. Attached Figure Description

[0057] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0058] Figure 1 This is a flowchart of the steps of a method for monitoring the jamming state of a spring-loaded energy storage switch according to Embodiment 1 of the present invention;

[0059] Figure 2 This is a schematic diagram illustrating the time zone division of the load switch closing process provided in Embodiment 1 of the present invention;

[0060] Figure 3 This is a flowchart illustrating the evaluation and result output of the load switch jamming state according to Embodiment 1 of the present invention.

[0061] Figure 4 This is a flowchart illustrating the method for monitoring the jamming state of a spring-loaded energy storage switch according to Embodiment 1 of the present invention.

[0062] Figure 5 This is a structural block diagram of a spring-loaded load switch jamming state monitoring device provided in Embodiment 2 of the present invention. Detailed Implementation

[0063] This invention provides a method and apparatus for monitoring the jamming state of a spring-loaded energy storage switch, which solves the technical problem that existing methods for monitoring the jamming state of spring-loaded energy storage switches generally use current monitoring to diagnose and evaluate the jamming state, resulting in poor monitoring performance.

[0064] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0065] Please see Figure 1 , Figure 1 The flowchart illustrates the steps of a method for monitoring the jamming state of a spring-loaded energy storage switch according to Embodiment 1 of the present invention.

[0066] This invention provides a method for monitoring the jamming state of a spring-loaded energy storage switch, comprising:

[0067] Step 101: Obtain multiple voltage and current signals of the drive motor in the spring energy storage load switch, and use preset data extraction criteria to extract target time signals based on multiple voltage and current signals to determine the closing action time of the composite switch and multiple target voltage and current signals.

[0068] The closing action time of the composite switch includes the start time of the composite switch closing state and the stop time of the composite switch closing state.

[0069] It should be noted that real-time voltage and current signals (instantaneous voltage and current values) at the input terminal of the drive motor of the load switch should be acquired using a waveform recorder or online data acquisition equipment. This includes multiple voltage and current signals from the drive motor in a spring-loaded load switch. The sampling frequency of the voltage and current signals should be no less than 5kHz.

[0070] Furthermore, the collected real-time voltage and current signals include waveform signals in the closed state of the load switch, waveform signals in the open state, and waveform signals in the inactive state of the load switch.

[0071] Furthermore, the process of extracting target time signals based on multiple voltage and current signals using preset data extraction criteria, and determining the closing action time of the composite switch and the multiple target voltage and current signals, can be achieved by executing the following steps S11 to S14:

[0072] Step S11: Filter multiple voltage and current signals to determine multiple intermediate voltage and current signals;

[0073] It should be noted that the process of filtering multiple voltage and current signals is as follows: based on the collected real-time voltage and current signals, the closing status of the composite switch is identified, and the voltage and current signals that meet the identification criteria are used as intermediate voltage and current signals (i.e., the voltage signal in the voltage and current signals is greater than or equal to 0.5*U). N Furthermore, the current signal in this voltage and current signal is greater than or equal to 0.2*I. N If the condition is met, it indicates that the voltage and current signals do not meet the identification criteria. The identification criteria are as follows:

[0074] U(t) i ≥0.5*U N & I(t) i )≥0.2*I N ;

[0075] Wherein, U(t) i U is the voltage signal at time t (i-th time). N I(t) is the rated voltage of the drive motor; i ) represents the current signal at time t, I; N is the rated current of the drive motor; & is the logical AND.

[0076] Step S12: Compare the times corresponding to each intermediate voltage and current signal to determine the maximum and minimum times;

[0077] It should be noted that the moment when the closing state criterion is met is recorded as the time set T={t i}, that is, the times corresponding to all intermediate voltage and current signals are recorded as a time set T={t i}, through time t i By comparing the numerical values, the maximum time T can be obtained. max =max{ti} and minimum time T min =min{t i}

[0078] Step S13: Using preset data extraction criteria, iterate the start and end times based on the maximum and minimum times to determine the start time and stop time of the composite switch closing state.

[0079] It should be noted that the preset data extraction criteria are used to find and obtain the start time T0 and stop time T4 of the composite switch closing state. The specific preset data extraction criteria are as follows:

[0080] U(T0) = U(T) min -k i *Δt)≤0.01*U N & I(T0) = I(T) min -k i *Δt)≤0.01*I N ;

[0081] U(T4) = U(T) max +k j *Δt)≤0.01*U N & I(T4) = I(T) max +k j *Δt)≤0.01*I N ;

[0082] Where Δt is the selected time parameter; k i and k j The value of the i / jth parameter to be found ranges from 0 to n; T0 is the start time of the closing state of the composite switch, according to T min -k i *The Δt rule is used to find it; T4 is the stopping time of the composite switch in the closed state, according to T max +k j *The Δt rule is used to find the intermediate voltage signal corresponding to the start time of the closing state of the composite switch; U(T0) is the intermediate voltage signal corresponding to the start and end times of the closing state of the composite switch; I(T0) is the intermediate current signal corresponding to the start time of the closing state of the composite switch; I(T4) is the intermediate current signal corresponding to the start and end times of the closing state of the composite switch.

[0083] Furthermore, k i and k j Starting from 0, the iteration and search are completed when the above criteria are met. When the above criteria are met, T0 = T. min -k i *Δt,T4=T max +k j *Δt, completes the identification of the load switch closing status.

[0084] It is worth mentioning that, for the initial time T0, it must satisfy the condition that at T... min -k i At the moment Δt, both the voltage U(T0) and the current I(T0) are very small; specifically, the voltage is less than or equal to the rated voltage U of the drive motor.N 0.01 times, the current is less than or equal to the rated current I of the drive motor. N 0.01 times. This is like finding a point before the earliest time that meets the closing conditions, where the voltage and current are very low, and considering this the actual start of closing. For the stopping time T4, it must satisfy the condition that T... max +k j At the moment *Δt, both the voltage U(T4) and current I(T4) are very small, that is, less than or equal to 0.01 times their respective rated values. This means that after finding the latest moment that meets the closing conditions, we find another moment later where the voltage and current are very low, and this moment is considered the moment when the closing is completed.

[0085] Step S14: Extract the intermediate voltage and current signal between the start time of the composite switch closing state and the stop time of the composite switch closing state, and use it as the target voltage and current signal.

[0086] It should be noted that after identifying the closing status of the load switch, the voltage data U0(t) and current data I0(t) within the time interval T0~T4 are extracted, which are the intermediate voltage and current signals, and the extracted intermediate voltage and current signals are used as the target voltage and current signals.

[0087] Step 102: Based on the motor type of the drive motor, preprocess multiple target voltage and current signals using a preset positive direction peak extraction rule to generate a parameter information set.

[0088] The parameter information set consists of a dataset composed of the calculated current I2(t) and the equivalent power signal P(t).

[0089] It should be noted that the preprocessing of voltage and current signals mainly includes two parts: (1) low-pass filtering to filter out high-frequency signals; (2) extraction of voltage and current calculation parameter information.

[0090] Specifically, step 102 may include the following sub-steps:

[0091] Step S21: Perform low-pass filtering on each target voltage and current signal to generate multiple low-pass filtered voltage and current signals;

[0092] It should be noted that the extracted voltage and current signals (target voltage and current signals) from time T0 to T4 are subjected to low-pass filtering. The iterative rules for low-pass filtering are as follows:

[0093] Y(t i +Δt)=α*X(t i +Δt)+(1-α)*Y(t i );

[0094] Where X represents the actual signal acquired (such as voltage or current), i.e., the target voltage and current signal; Y represents the signal result after low-pass filtering, i.e., the low-pass filtered voltage and current signal; t i and t i +Δt represents two adjacent calculation times; α represents the filter coefficient.

[0095] Furthermore, by low-pass filtering, the filtered voltage data U1(t) and current data I1(t) are obtained, which are the low-pass filtered voltage and current signals.

[0096] Step S22: When the type of the drive motor is a DC motor, calculate the equivalent power signal corresponding to each low-pass filter voltage and current signal based on each low-pass filter voltage and current signal.

[0097] Step S23: Construct a parameter information set using the low-pass filtered current signal and multiple equivalent power signals from multiple low-pass filtered voltage and current signals;

[0098] It should be noted that if the drive motor is a DC motor, then the calculated voltage U2(t) = U1(t), the calculated current I2(t) = I1(t), and the calculated phase angle θ(t) = 0.

[0099] Furthermore, by using the calculated voltage U2(t) and calculated current I2(t), the corresponding equivalent power signal P(t) = U2(t) * I2(t) * cosθ(t) = U2(t) * I2(t) is calculated. Using the calculated current I2(t) and the equivalent power signal P(t), a parameter information set K(t) = {t, I2(t), P(t)} is constructed, where the value of time t is in the range of t∈[T0, T4].

[0100] Step S24: When the type of the drive motor is an AC motor, the voltage and current peak values ​​are extracted based on multiple low-pass filtered voltage and current signals using a preset positive peak extraction rule, and multiple voltage and current peak values ​​are determined.

[0101] Step S25: Calculate the equivalent power signal corresponding to each voltage and current peak value based on the peak values ​​of each voltage and current and the time corresponding to each peak value of each voltage and current.

[0102] Step S26: Construct a parameter information set using the peak current value from multiple voltage and current peak values ​​and multiple equivalent power signals.

[0103] The preset positive peak extraction rule is used to extract the positive peak values ​​(i.e., the peak values ​​of voltage and current) of voltage U1(t) and current I1(t).

[0104] It should be noted that if the drive motor is an AC motor, then all peak points U that meet the requirements are extracted using a preset positive direction peak extraction rule. 1max (t i ) and I 1max (t j This involves sequentially extracting the positive peak values ​​of the voltage and current waveforms, extracting the time and amplitude of all peak sets, and generating the corresponding calculation parameters.

[0105] Pre-defined positive peak extraction rules, specifically,

[0106] [Y(t i )-Y(t i +Δt)]×[Y(t i )-Y(t i -Δt)]>0 & Y(t i )>0;

[0107] Among them, t i and t j These are the moments when voltage U1(t) and current I1(t) reach their positive peak values, respectively; U 1max (t i ) for t i Time U 1max The value at the peak point; I 1max (t j ) for t j Time I 1max The value at the peak point.

[0108] It should be noted that for the preset positive direction peak extraction rule, [Y(t i )-Y(t i +Δt)]×[Y(t i )-Y(t i -Δt)]>0, mathematically speaking, this formula is used to determine Y(t) i )(t i Is the low-pass filtered voltage and current signal at time t a local maximum? i )-Y(t i +Δt)]>0 and [Y(t)]>0 and [Y(t)] i )-Y(t i When -Δt)]>0, it means that at t i The Y value at time t is greater than its value at time t. i +Δt time and t i The value at time -Δt, i.e., Y(t) i ) is a local maximum, and also needs to satisfy Y(t) i )>0, only when Y is in t iOnly when the value at time t is greater than 0 will the preset positive direction peak extraction rule be satisfied, thus allowing Y(t) to be extracted. i If the preset positive direction peak value is not met, then Y(t) will be used as the peak value of voltage and current. i ) Remove, where all Y(t) i If the preset positive peak extraction rule is not met, a new voltage and current signal is acquired, and the monitoring process is re-executed.

[0109] Furthermore, extract the peak set {U} 1max (t i )} and {I 1max (t j The time and amplitude of the voltage and current peak values ​​(i.e., the peak values ​​of voltage and current and the corresponding moments, including the positive peak values ​​of the voltage and current waves) are used to calculate the voltage U2 (t). i ) = {Y max (t i The peak value of the positive current waveform is used as the calculated current I2(t). j ) = {Y max (t j )}, where Y max (t i ) is the output t based on the preset positive direction peak extraction rule. i Voltage at time Y max (t j ) is the output t based on the preset positive direction peak extraction rule. j The current at time t. Therefore, U2 is only the current formed by the positive peak of the voltage wave at time t. i The dataset below, where I2 is the peak time t of the positive current wave shape. j The dataset is composed of the following elements.

[0110] Further, after preprocessing the voltage and current signals, the equivalent power curve is calculated. The equivalent power P(t) curve (composed of multiple equivalent power signals) can be calculated from the voltage and current signals. The calculation process is as follows: P(t... j =U2(t) i )*I2(t j )*cos[(t j -t i )*f*360°],where, 0 <t j -t i <1 / f, where f is the operating frequency of the AC motor, P(t) j ) is the equivalent power signal at the j-th time t, calculated from the peak values ​​of voltage and current and the time corresponding to the peak values ​​of voltage and current.

[0111] Furthermore, by using the peak current value from multiple voltage and current peak values ​​and multiple equivalent power signals, a parameter information set K(t) is constructed. j )={t j I2(t) j ), P(t j )}, where t j ∈[T0, T4].

[0112] Step 103: Based on the preset time determination rules, the closing action time of the composite switch is divided using the parameter information set to determine the motor start time, motor running time, and spring energy storage time.

[0113] The preset timing determination rules are a set of pre-defined logical conditions used to divide the closing operation of a spring-loaded load switch into different time intervals based on the characteristics of the current signal. The preset timing determination rules include the first timing determination rule, the second timing determination rule, and the third timing determination rule.

[0114] It should be noted that, based on the structural characteristics of the spring-energy-storage load switch, the time range for monitoring the jamming state is divided. The I²(t) curve is used to determine the time nodes, where the I²(t) curve is composed of all calculated currents (current values) from the parameter information set. The closing action time T0~T4 of the composite switch is divided as follows: T0~T1 is the motor starting time, T1~T2 is the motor running time, T2~T3 is the time for the motor to compress the spring for energy storage (spring energy storage time), and T3~T4 is the motor stopping time after the composite switch closes (motor stopping time).

[0115] Specifically, step 103 may include the following sub-steps S31-S33:

[0116] Step S31: Determine whether multiple current values ​​in the parameter information set satisfy the first time judgment rule, the second time judgment rule, and the third time judgment rule;

[0117] Step S32: Determine the motor start time based on the start time of the closing state of the composite switch and the time corresponding to the current value that satisfies the first time judgment rule;

[0118] Step S33: Determine the motor running time and spring energy storage time based on the time corresponding to the current value that satisfies the first time determination rule, the time corresponding to the current value that satisfies the second time determination rule, and the time corresponding to the current value that satisfies the third time determination rule.

[0119] It should be noted that the determination of the first time step rule includes two determinations: a first determination at time T1 (which will identify all valley point data) and a second determination at time T1. Only when both determinations are satisfied will the time T1 corresponding to the current value that satisfies the first time step rule be output.

[0120] Specifically, a determination is first made at time T1: [I2(t i +Δt)-I2(t i )]×[I2(t i -Δt)-I2(t i )]≥0 & [I2(t i -Δt)-I2(t i )]>0; where, I2(t i ) for t i The current value at time t; for each t i The current value at time t is calculated. i +Δt)-I2(t i )]、[I2(t i -Δt)-I2(t i Determine whether [I2(t)] simultaneously satisfies [t] i +Δt)-I2(t i )]×[I2(t i -Δt)-I2(t i )]≥0 and [I2(t i -Δt)-I2(t i The two conditions, ]>0, when a certain t i If the current value at time T1 satisfies the above judgment rule, a second judgment is performed on it: t i >T(I 2max ) & T1=min{t i If the t i The time is greater than the time corresponding to the maximum current value in the parameter information set (the time of the maximum peak current), and this t i The time t is the minimum value among all the judgments that satisfy the condition at time T1, that is, all the times t that satisfy the condition at time T1. i If the minimum value of t is found, then t will be... i The output time is T1, which corresponds to the current value that satisfies the first time-determination rule.

[0121] Furthermore, the determination of time T3 (the time corresponding to the current value that satisfies the second time determination rule) must satisfy the second time determination rule, which is as follows:

[0122] I2(t i )-I2(t i+Δt)>0&I N >I2(t i )>I2(T1) & T3=t i {max[(I2(t i )-I2(t i +Δt)) / (I2(t i -Δt)-I2(t i ))]};

[0123] Where t i {max[(I2(t i )-I2(t i +Δt)) / (I2(t i -Δt)-I2(t i ))]} is (I2(t i )-I2(t i +Δt)) / (I2(t i -Δt)-I2(t i )) Take the time t at the maximum value i .

[0124] Specifically, for each t in the parameter information set i The current value at time t is first checked to see if it satisfies I2(t). i )-I2(t i +Δt)>0 and I N >I2(t i If the two conditions > I2(T1) are not met, skip that t. i At time t, if the condition is met, it is added to the candidate set for the next calculation. Then, for each t in the candidate set... i Calculate the current value at time t (I2(t)). i )-I2(t i +Δt)) / (I2(t i -Δt)-I2(t i Compare the values ​​of t, find the value corresponding to the maximum value. i The time is determined as the time T3 corresponding to the current value that satisfies the second time determination rule.

[0125] Furthermore, the determination of time T2 (the time corresponding to the current value that satisfies the third time determination rule) must satisfy the third time determination rule, which is as follows:

[0126] I2(T3)≥I2(t i )≥I2(T1) & I2(t i +Δt)-I2(t i )>|I2(t i-Δt)-I2(t i )| & 0.7≤(T2-T1) / (T3-T1)≤1.3;

[0127] Specifically, for each t in the parameter information set i The current value at time t is used to determine whether I2(T3) ≥ I2(t) i )≥I2(T1) and I2(t i +Δt)-I2(t i )>|I2(t i -Δt)-I2(t i If these two conditions are not met, skip that t. i At time t, if the condition is met, it is added to the candidate set for the next calculation. For each t in the candidate set... i Let time be T2, calculate (T2-T1) / (T3-T1), and determine if it satisfies 0.7≤(T2-T1) / (T3-T1)≤1.3. If it does, then the time is T2. i The time is the time corresponding to the current value that satisfies the third time-determination rule. If there are multiple t values ​​in the candidate set that satisfy this condition... i The timing can be further selected based on specific application needs.

[0128] Further, please refer to Figure 2 Based on the above steps, time nodes T1, T2, and T3 can be obtained. Combined with the start time T0 and the stop time T4 of the composite switch closing state, the time area for jamming state monitoring is divided, thus obtaining the motor start time T0~T1, the motor running time T1~T2, the time for the motor to compress the spring for spring energy storage (spring energy storage time) T2~T3, and the motor stop time T3~T4 after the composite switch is closed.

[0129] Step 104: Based on the motor start-up time, motor running time, spring energy storage time, and composite switch closing action time, the jamming state is monitored according to the parameter information set using the preset jamming state diagnosis rules, and jamming state monitoring results are generated.

[0130] The jamming state monitoring results include the first jamming state monitoring results, the second jamming state monitoring results, and the third jamming state monitoring results.

[0131] The preset jamming condition diagnostic rules are a comprehensive set of criteria used to determine whether a load switch is jammed based on current and power signal characteristics, thereby locating the jamming component (drive motor, reduction gear, or energy storage spring). The preset jamming condition diagnostic rules include current jamming condition diagnostic criteria and power jamming condition diagnostic criteria. The current jamming condition diagnostic criteria are threshold rules based on the amplitude or waveform characteristics of the current signal, used to quickly determine whether the load switch is mechanically jammed. The power jamming condition diagnostic criteria are multi-level criteria based on power signal characteristics (weighted average, fluctuation), used to subdivide the jamming location and verify the current criterion results.

[0132] It should be noted that you should refer to [link / reference]. Figure 3 The assessment of load switch jamming status can be achieved through numerical tuning of the I2(t) curve and the P(t) curve. The equivalent power signal from the parameter information set is used as the power value, and the power curve P(t) is constructed based on all the power values. The I2(t) curve can be used for rapid assessment of load switch jamming status, while the P(t) curve enables accurate assessment of combined switch jamming status and potential hazard locations.

[0133] Specifically, step 104 may include the following sub-steps:

[0134] Step S41: Based on the motor running time and spring energy storage time, determine whether multiple current values ​​in the parameter information set meet the diagnostic criteria for current jamming state.

[0135] Step S42: If satisfied, the first jamming state monitoring result is determined to be that the spring-loaded load switch is jammed.

[0136] It should be noted that the first jamming condition monitoring result indicates that the spring-loaded load switch is jammed, including jamming of the drive motor or reduction mechanism and jamming of the energy storage spring structure. The diagnostic rules based on current threshold determination (current jamming condition diagnostic criteria) are as follows:

[0137] If t i ∈[T1, T2], and there exists I2(t i ≥0.7*I N The problem was determined to be a jammed motor or speed reduction mechanism.

[0138] If t i ∈[T2, T3], and there exists I2(t i ≥1.2*I N The problem was determined to be a jammed motor or speed reduction mechanism.

[0139] Specifically, for each t in the parameter information set i The current value at time ∈ [T1, T2], if there exists I2(t i ≥0.7*IN Meanwhile, for each t in the parameter information set i The current value at time ∈ [T2, T3], if there exists I2(t i ≥1.2*I N If the first jamming state monitoring result indicates that the drive motor or reduction mechanism is jammed, or that the energy storage spring structure is jammed, then the first jamming state monitoring result is determined as the corresponding judgment result. If neither condition is met, then the jamming state is evaluated using the equivalent power P(t) curve.

[0140] Step S43: If not satisfied, the power jamming state diagnosis criteria are used to monitor the motor start-up time, motor running time, spring energy storage time, composite switch closing action time, and parameter information set to generate the second jamming state monitoring result and the third jamming state monitoring result.

[0141] The diagnostic criteria for power jamming include the first power criterion, the second power criterion, the third power criterion, and the fourth power criterion.

[0142] Furthermore, step S43 may include the following sub-steps:

[0143] Step S431: Based on the motor start time, motor running time, spring energy storage time, and composite switch closing action time, extract power values ​​from the parameter information set and output multiple power values ​​corresponding to the motor start time, multiple power values ​​corresponding to the motor running time, multiple power values ​​corresponding to the spring energy storage time, and multiple power values ​​corresponding to the composite switch closing action time.

[0144] It should be noted that in the parameter information set, the power values ​​during the motor start-up time, the power values ​​during the motor running time, the power values ​​during the spring energy storage time, and the power values ​​during the composite switch closing action time are extracted.

[0145] Step S432: Perform weighted average calculations on multiple power values ​​corresponding to motor start time, multiple power values ​​corresponding to motor running time, multiple power values ​​corresponding to spring energy storage time, and multiple power values ​​corresponding to composite switch closing action time, and output the weighted average power value corresponding to motor start time, motor running time, spring energy storage time, and composite switch closing action time.

[0146] It should be noted that the calculation of equivalent power P over different time periods is necessary. T0-T4 P T0-T1 P T1-T2 P T2-TThe calculation process for the weighted average power and the weighted average power corresponding to the closing action time of the composite switch is as follows:

[0147] ;

[0148] in, Equivalent power P T0-T4 The weighted average value, that is, the weighted average power value corresponding to the closing action time of the composite switch; This represents the total number of nodes between time points T0 and T4. Let be the power value at time t;

[0149] The calculation process for the weighted average power P1 corresponding to the motor start-up time, the weighted average power P2 corresponding to the motor running time, and the weighted average power P3 corresponding to the spring energy storage time is the same as the calculation process for the weighted average power corresponding to the closing action time of the composite switch, and will not be elaborated further in this invention.

[0150] Step S433: Determine whether the weighted average power value corresponding to the closing action time of the composite switch meets the first power criterion;

[0151] Step S434: If the condition is not met, the second jamming state monitoring result is determined to be that the spring-energy-storage load switch is not jammed.

[0152] It should be noted that the first power criterion, "whether P0 ≥ 1.2P", is used. N The presence of jamming in the spring-loaded load switch is assessed based on the weighted average power value corresponding to the closing action time of the composite switch. Among them, P... N This is equivalent to the average rated power during the time interval T0-T4. If the result is "No", then "No jamming state" is output, meaning the second jamming state monitoring result confirms that the spring energy storage load switch is not jamming; if the result is "Yes", the next step of diagnosis is required.

[0153] Step S435: If satisfied, calculate the target power criterion value and the power difference corresponding to each power value corresponding to the motor running time based on the multiple power values ​​corresponding to the motor running time and the weighted average power value corresponding to the motor running time.

[0154] Step S436: Compare the absolute values ​​of the power differences corresponding to the motor running time with the target power criterion value;

[0155] Step S437: Take the absolute value of the power difference corresponding to the motor running time that is less than or equal to the target power criterion value as the target power value, and calculate the target weighted power average value corresponding to the motor running time based on the target power value corresponding to the motor running time.

[0156] It should be noted that the weighted average power value corresponding to the motor's operating time is first used to determine whether "abnormal data" exists. The criterion |P is used. i -P2|>3P y To perform the calculation, where For P T1-T2 The values ​​in the table represent multiple power values ​​corresponding to the motor's operating time. The standard deviation of the data, 3P y As the target power criterion value, for each power value corresponding to the motor running time, when a certain power value P corresponding to the motor running time... i Satisfy | P i -P2|>3P y If this criterion is met, it indicates that the power value is abnormal data and is removed. Power values ​​that do not meet the criterion are used as target power values ​​and are used to calculate the target weighted average power P'2 corresponding to the motor running time.

[0157] Step S438: Determine whether the weighted average power corresponding to the motor start time and the target weighted average power corresponding to the motor running time satisfy the second power criterion;

[0158] Step S439: If not satisfied, the second jamming state monitoring result is determined to be that the drive motor in the spring energy storage load switch is not jammed, but the reduction device is jammed.

[0159] It should be noted that the second power criterion "whether P1 ≥ 1.2P'2" is used to determine the power based on the weighted average power corresponding to the motor start-up time and the target weighted average power corresponding to the motor running time. If the result is "no", the output is "the drive motor is not stuck, but the reduction gear is stuck"; if the result is "yes", the third power criterion is used for evaluation.

[0160] Step S4310: If satisfied, determine whether the weighted average power value corresponding to the motor running time and the weighted average power value corresponding to the motor starting time satisfy the third power criterion.

[0161] Step S4311: If not satisfied, the second jamming state monitoring result is determined to be that the drive motor in the spring energy storage load switch is jammed, but the reduction device is not jammed.

[0162] Step S4312: If satisfied, the second jamming state monitoring result is determined to be jamming of the drive motor and the reduction gear in the spring energy storage load switch;

[0163] It should be noted that the third power criterion "whether P2 ≥ 1.2P1" is used to make the judgment based on the weighted average power corresponding to the motor running time and the weighted average power corresponding to the motor start time. If the result is "no", the output is "motor jammed, reduction gear not jammed"; if the result is "yes", the output is "motor jammed, reduction gear jammed".

[0164] Step S4313: Determine whether the weighted average power value corresponding to the spring energy storage time meets the fourth power criterion;

[0165] Step S4314: If satisfied, the third jamming state monitoring result is determined to be the energy storage spring jamming in the spring energy storage load switch.

[0166] Step S4315: If the condition is not met, the third jamming state monitoring result is determined to be that the energy storage spring in the spring energy storage load switch is not jammed.

[0167] It should be noted that the fourth power criterion, "whether P3 ≥ 1.2P", is used. T The determination is based on the weighted average power corresponding to the spring's energy storage time, where P... T =[(T4-T0)*P N -(T2-T0)*P'2] / (T3-T2), if the result is "yes", then output "energy storage spring is stuck"; if the result is "no", then output "energy storage spring is not stuck".

[0168] For comparison of technical effectiveness, existing technologies can be referenced. Load switches in switchgear, used to break loads and short-circuit currents, generally employ a spring-loaded energy storage structure. However, because this structure involves motors, reduction gears, and spring mechanisms, improper maintenance in practical applications can easily lead to jamming of the load switch, directly affecting its reliable operation.

[0169] It should be noted that performing maintenance when the load switch is known to be jammed is not difficult. However, how to identify potential jamming hazards in the internal structural components of the load switch during the project, and how to quickly locate the jamming, are the key issues that urgently need to be solved. This is of great significance for achieving rapid and intelligent operation and maintenance of the load switch in the switchgear.

[0170] However, in engineering applications, there is a lack of effective technical solutions that can quickly identify jamming points inside load switches, and achieving precise jamming location is even more unlikely.

[0171] Existing research generally employs current monitoring methods for assessing the jamming of composite switches. However, its multi-waveform processing, decoupling, and application of multiple current signals are relatively simple, and the criteria for jamming diagnosis still need improvement. Currently, there is a lack of a load switch jamming detection method that can be directly applied to engineering applications. Furthermore, most existing research on composite switch jamming focuses on model training, using large training sets to assess the jamming status. However, in actual engineering, the location, degree, and presentation of jamming vary greatly. More importantly, there is a lack of substantial training data on-site, limiting the application of many intelligent algorithms. In addition, load switch jamming involves various mechanical components such as motors, reduction mechanisms, and spring mechanisms. Achieving reliable jamming assessment and location requires preprocessing of the echo signals. Obtaining reliable and applicable signals is crucial for reliable jamming identification, but current patents in this area are very limited.

[0172] To address the above problems, this invention proposes a method for monitoring the jamming state of a spring-loaded load switch. Please refer to [link to relevant documentation]. Figure 4 First, the real-time voltage and current signals of the drive motor of the spring-loaded energy storage switch are acquired. Then, the closing state of the load switch is identified, and voltage and current data are extracted. The voltage and current signals are preprocessed, and the equivalent power curve is calculated. The time zone for monitoring the jamming state is divided, and the boundary time of the zone is determined. Finally, the jamming state of the load switch is evaluated, and the results are output. This invention fully considers the structural characteristics of the load switch, studies the current waveform law of the drive motor used in the load switch, and proposes jamming monitoring based on current and power characterization, enabling rapid identification of jamming states and jamming points from multiple dimensions. Furthermore, this invention is geared towards online detection applications. Based on the real-time voltage and current waveform acquisition characteristics of the waveform recorder, combined with effective data extraction criteria, it can achieve rapid extraction of the closing current and voltage signals of the load switch. Additionally, by incorporating the transient current characteristics at the moment of closing, a time zone division rule is proposed for identifying jamming in motors, deceleration structures, and energy storage springs, enabling rapid and effective identification of jamming locations. Furthermore, the current echo detection method can be used for rapid and reliable identification of jamming conditions, and corresponding identification criteria are proposed. Simultaneously, the power identification criteria based on multi-level identification management enables rapid and effective identification of jamming points. The two identification criteria can be applied in conjunction, facilitating the rapid investigation of potential jamming hazards on-site.

[0173] In summary, this invention fully considers the disturbance issues in engineering applications in terms of data processing and time period division based on current signals, resulting in higher reliability and applicability to field applications. Furthermore, this invention, through the identification and criterion setting of load switch jamming states for engineering applications, only requires extracting the voltage and current signals at the instant the load switch closes. Through data preprocessing and the setting of identification criteria, effective identification of jamming states can be achieved. For the identification needs of different jamming points, criteria applicable to motor jamming, reduction gear jamming, and energy storage spring jamming detection are proposed, focusing more on engineering applications. Reliable identification of each monitoring area facilitates rapid troubleshooting of jamming points. This criterion fully considers the characteristics of the closing current, and combined with the criteria for each time inflection point in the closing current, it can achieve the division of monitoring time areas, facilitating engineering applications for identifying different jamming points. Moreover, this invention proposes a hierarchical iterative logic based on current signal-power signal. The application of this logic can better separate the steps of motor starting, motor operation, and spring energy storage at the instant of closing, making the prediction of jamming points more targeted. Furthermore, this invention, based on current echo detection, can be used for rapid assessment of jamming conditions and calculation of power characteristics, and can be used to identify and address jamming points. This solution is applicable to various on-site testing needs and has significant engineering implications.

[0174] In this embodiment of the invention, a method for monitoring the jamming state of a spring-loaded energy storage switch is provided. The method acquires multiple voltage and current signals from the drive motor in the spring-loaded energy storage switch, and uses preset data extraction criteria to extract target time signals from these signals to determine the closing action time of the composite switch and multiple target voltage and current signals. Based on the motor type of the drive motor, a preset positive peak extraction rule is used to preprocess the multiple target voltage and current signals to generate a parameter information set. Based on a preset time determination rule, the closing action time of the composite switch is divided using the parameter information set to determine the motor start-up time, motor running time, and spring energy storage time. Based on the motor start-up time, motor running time, spring energy storage time, and composite switch closing action time, a preset jamming state diagnosis rule is used to monitor the jamming state according to the parameter information set, generating a jamming state monitoring result. Based on the above scheme, the target time signal is extracted from multiple voltage and current signals by using preset data extraction criteria to determine the closing action time of the composite switch and multiple target voltage and current signals. The closing action time of the composite switch and multiple target voltage and current signals are then processed in conjunction with the motor type of the drive motor, preset time judgment rules, and preset jamming state diagnosis rules to output the jamming state monitoring results. This invention, combined with effective data extraction criteria, can realize the rapid extraction of the closing current and voltage signals of the load switch, thereby achieving rapid and effective identification of the jamming state and improving the monitoring effect of the jamming state of the spring energy storage load switch.

[0175] Please see Figure 5 , Figure 5 This is a structural block diagram of a spring-loaded load switch jamming state monitoring device provided in Embodiment 2 of the present invention.

[0176] The present invention provides a jamming state monitoring device for a spring-loaded load switch, comprising:

[0177] The acquisition module 501 is used to acquire multiple voltage and current signals of the drive motor in the spring energy storage load switch, and to extract target time signals based on the multiple voltage and current signals using preset data extraction criteria, thereby determining the closing action time of the composite switch and multiple target voltage and current signals.

[0178] The preprocessing module 502 is used to preprocess multiple target voltage and current signals based on the motor type of the drive motor and using a preset positive peak extraction rule to generate a parameter information set;

[0179] The partitioning module 503 is used to partition the closing action time of the composite switch based on the preset time determination rules and the parameter information set, and to determine the motor start time, motor running time, and spring energy storage time.

[0180] The monitoring module 504 is used to monitor the jamming state based on the motor start-up time, motor running time, spring energy storage time, and composite switch closing action time, and generates jamming state monitoring results by adopting preset jamming state diagnosis rules and parameter information set.

[0181] Furthermore, the closing action time of the composite switch includes the start time and the stop time of the composite switch closing state. The acquisition module 501 is specifically used for:

[0182] Multiple voltage and current signals are filtered to determine multiple intermediate voltage and current signals;

[0183] Compare the times corresponding to each intermediate voltage and current signal to determine the maximum and minimum times;

[0184] The start and end times of the composite switch closing state are determined by iterating the start and end times based on the maximum and minimum times using preset data extraction criteria.

[0185] Extract the intermediate voltage and current signals between the start time and the stop time of the composite switch closing state, and use them as the target voltage and current signals.

[0186] Furthermore, the preprocessing module 502 is specifically used for:

[0187] Each target voltage and current signal is low-pass filtered to generate multiple low-pass filtered voltage and current signals.

[0188] When the type of the drive motor is a DC motor, the equivalent power signal corresponding to each low-pass filter voltage and current signal is calculated based on each low-pass filter voltage and current signal.

[0189] A parameter information set is constructed by using the low-pass filtered current signal and multiple equivalent power signals from multiple low-pass filtered voltage and current signals.

[0190] When the type of the drive motor is an AC motor, the voltage and current peak values ​​are extracted based on multiple low-pass filtered voltage and current signals using a preset positive peak extraction rule, and multiple voltage and current peak values ​​are determined.

[0191] Calculate the equivalent power signal corresponding to each voltage and current peak value based on the peak values ​​of each voltage and current and the time corresponding to each peak value of each voltage and current.

[0192] A parameter information set is constructed by using the peak current value from multiple voltage and current peak values ​​and multiple equivalent power signals.

[0193] Furthermore, the preset time determination rules include a first time determination rule, a second time determination rule, and a third time determination rule; the partitioning module 503 is specifically used for:

[0194] Determine whether multiple current values ​​in the parameter information set satisfy the first time judgment rule, the second time judgment rule, and the third time judgment rule;

[0195] The motor start time is determined based on the start time of the closed state of the composite switch and the time corresponding to the current value that satisfies the first time determination rule.

[0196] The motor running time and spring energy storage time are determined based on the time corresponding to the current value that satisfies the first time determination rule, the time corresponding to the current value that satisfies the second time determination rule, and the time corresponding to the current value that satisfies the third time determination rule.

[0197] Furthermore, the jamming state monitoring results include the first jamming state monitoring result, the second jamming state monitoring result, and the third jamming state monitoring result; the preset jamming state diagnostic rules include current jamming state diagnostic criteria and power jamming state diagnostic criteria; the monitoring module 504 includes:

[0198] The first submodule is used to determine whether multiple current values ​​in the parameter information set meet the diagnostic criteria for current jamming state based on the motor running time and spring energy storage time.

[0199] The second submodule is used to determine the first jamming state monitoring result as indicating that the spring-energy-storage load switch is jammed if the condition is met.

[0200] The third submodule is used to monitor the motor starting time, motor running time, spring energy storage time, composite switch closing action time, and parameter information set according to the power jamming state diagnostic criteria if the conditions are not met, and to generate the second jamming state monitoring result and the third jamming state monitoring result.

[0201] Furthermore, the power jamming state diagnostic criteria include a first power criterion, a second power criterion, a third power criterion, and a fourth power criterion; the third submodule is specifically used for:

[0202] Based on the motor start-up time, motor running time, spring energy storage time, and composite switch closing action time, power values ​​are extracted from the parameter information set, and multiple power values ​​corresponding to the motor start-up time, motor running time, spring energy storage time, and composite switch closing action time are output.

[0203] The weighted average values ​​corresponding to the motor start time, the motor running time, the spring energy storage time, and the composite switch closing time are calculated separately, and the weighted average power values ​​are output for the motor start time, the motor running time, the spring energy storage time, and the composite switch closing time.

[0204] Determine whether the weighted average power value corresponding to the closing action time of the composite switch meets the first power criterion;

[0205] If the condition is not met, the second jamming state monitoring result determines that the spring-loaded load switch is not jamming.

[0206] If satisfied, then calculate the target power criterion value and the power difference corresponding to each power value corresponding to the motor running time based on the multiple power values ​​corresponding to the motor running time and the weighted average power value corresponding to the motor running time.

[0207] Compare the absolute values ​​of the various power differences corresponding to the motor running time with the target power criterion value;

[0208] The absolute value of the power difference corresponding to the motor running time that is less than or equal to the target power criterion value is used as the target power value, and the target weighted power average value corresponding to the motor running time is calculated based on the target power value corresponding to the motor running time.

[0209] Determine whether the weighted average power corresponding to the motor start-up time and the target weighted average power corresponding to the motor running time satisfy the second power criterion;

[0210] If the conditions are not met, the second jamming state monitoring result is determined to be that the drive motor in the spring energy storage type load switch is not jammed, but the reduction device is jammed.

[0211] If satisfied, then determine whether the weighted average power value corresponding to the motor running time and the weighted average power value corresponding to the motor starting time satisfy the third power criterion;

[0212] If the conditions are not met, the second jamming state monitoring result will be determined as the drive motor in the spring energy storage load switch being jammed, while the reduction gear is not jammed.

[0213] If the conditions are met, the second jamming state monitoring result is determined to be jamming of the drive motor and the reduction gear in the spring energy storage load switch;

[0214] Determine whether the weighted average power value corresponding to the spring energy storage time satisfies the fourth power criterion;

[0215] If the condition is met, the third jamming state monitoring result is determined to be the energy storage spring jamming in the spring energy storage type load switch;

[0216] If the condition is not met, the third jamming state monitoring result determines that the energy storage spring in the spring-type energy storage load switch is not jammed.

[0217] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the devices, modules, and sub-modules described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0218] This invention also provides a computer device, including a memory and a processor, wherein the memory stores a computer program; when the computer program is executed by the processor, the processor performs the steps of the spring-energy-storage load switch jamming state monitoring method as described in any of the above embodiments.

[0219] This invention also provides a computer-readable storage medium storing a computer program / instructions thereon, which, when executed by a processor, implements the steps of the spring-loaded load switch jamming state monitoring method as described in any of the above embodiments.

[0220] This invention also provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements the steps of the spring-loaded load switch jamming state monitoring method as described in any of the above embodiments.

[0221] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0222] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0223] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for monitoring the jamming state of a spring-loaded load switch, characterized in that, include: Multiple voltage and current signals of the drive motor in the spring-loaded energy storage switch are acquired, and target time signals are extracted based on the multiple voltage and current signals using preset data extraction criteria to determine the closing action time of the load switch and multiple target voltage and current signals. Based on the motor type of the drive motor, a preset positive peak extraction rule is used to preprocess multiple target voltage and current signals to generate a parameter information set; Based on the preset timing determination rules, the load switch closing action time is divided using the parameter information set to determine the motor start time, motor running time, and spring energy storage time. Based on the motor start-up time, the motor running time, the spring energy storage time, and the load switch closing action time, a pre-set jamming state diagnosis rule is used to monitor the jamming state according to the parameter information set, and a jamming state monitoring result is generated.

2. The method for monitoring the jamming state of a spring-loaded load switch according to claim 1, characterized in that, The load switch closing action time includes the start time of the load switch closing state and the stop time of the load switch closing state; the step of using preset data extraction criteria to extract target time signals based on multiple voltage and current signals to determine the load switch closing action time and multiple target voltage and current signals includes: Filter the multiple voltage and current signals to determine multiple intermediate voltage and current signals; Compare the times corresponding to each of the intermediate voltage and current signals to determine the maximum and minimum times; The start and end times of the load switch closing state are determined by iterating the start and end times based on the maximum time and the minimum time using preset data extraction criteria. Extract the intermediate voltage and current signal between the start time of the load switch closing state and the stop time of the load switch closing state, and use it as the target voltage and current signal.

3. The method for monitoring the jamming state of a spring-loaded load switch according to claim 1, characterized in that, Based on the motor type of the drive motor, a preset positive peak extraction rule is used to preprocess multiple target voltage and current signals to generate a parameter information set, including: Each of the target voltage and current signals is subjected to low-pass filtering to generate multiple low-pass filtered voltage and current signals. When the type of the drive motor is a DC motor, the equivalent power signal corresponding to each low-pass filter voltage and current signal is calculated based on each low-pass filter voltage and current signal. A parameter information set is constructed by using the low-pass filtered current signal from the multiple low-pass filtered voltage and current signals and the multiple equivalent power signals; When the type of the drive motor is an AC motor, the voltage and current peak values ​​are extracted based on multiple low-pass filtered voltage and current signals using a preset positive peak extraction rule, and multiple voltage and current peak values ​​are determined. Calculate the equivalent power signal corresponding to each voltage and current peak value based on the peak values ​​of each voltage and current and the time corresponding to each peak value of each voltage and current. A parameter information set is constructed using the peak current value from multiple voltage and current peak values ​​and multiple equivalent power signals.

4. The method for monitoring the jamming state of a spring-loaded load switch according to claim 2, characterized in that, The preset time determination rules include a first time determination rule, a second time determination rule, and a third time determination rule; based on the preset time determination rules, the parameter information set is used to divide the load switch closing action time to determine the motor start-up time, motor running time, and spring energy storage time, including: Determine whether multiple current values ​​in the parameter information set satisfy the first time determination rule, the second time determination rule, and the third time determination rule; The motor start time is determined based on the start time of the load switch closing state and the time corresponding to the current value that satisfies the first time determination rule. The motor running time and spring energy storage time are determined based on the time corresponding to the current value that satisfies the first time determination rule, the time corresponding to the current value that satisfies the second time determination rule, and the time corresponding to the current value that satisfies the third time determination rule.

5. The method for monitoring the jamming state of a spring-loaded load switch according to claim 1, characterized in that, The jamming state monitoring results include a first jamming state monitoring result, a second jamming state monitoring result, and a third jamming state monitoring result; the preset jamming state diagnostic rules include current jamming state diagnostic criteria and power jamming state diagnostic criteria; the jamming state monitoring is performed based on the motor start-up time, the motor running time, the spring energy storage time, and the load switch closing action time, using the preset jamming state diagnostic rules according to the parameter information set, to generate jamming state monitoring results, including: Based on the motor running time and the spring energy storage time, determine whether multiple current values ​​in the parameter information set meet the diagnostic criteria for current jamming state. If the condition is met, the first jamming state monitoring result determines that the spring-energy-storage load switch is jammed. If the conditions are not met, the power jamming state diagnostic criteria are used to monitor the motor start-up time, the motor running time, the spring energy storage time, the load switch closing action time, and the parameter information set to generate a second jamming state monitoring result and a third jamming state monitoring result.

6. The method for monitoring the jamming state of a spring-loaded load switch according to claim 5, characterized in that, The power jamming state diagnostic criteria include a first power criterion, a second power criterion, a third power criterion, and a fourth power criterion; the power jamming state diagnostic criteria are used to monitor the motor start-up time, the motor running time, the spring energy storage time, the load switch closing action time, and the parameter information set to generate a second jamming state monitoring result and a third jamming state monitoring result, including: Based on the motor start-up time, the motor running time, the spring energy storage time, and the load switch closing action time, power values ​​are extracted from the parameter information set, and multiple power values ​​corresponding to the motor start-up time, the motor running time, the spring energy storage time, and the load switch closing action time are output. The weighted average values ​​corresponding to the motor start time, the motor running time, the spring energy storage time, and the load switch closing time are calculated and output as follows: Determine whether the weighted average power value corresponding to the closing action time of the load switch meets the first power criterion; If the condition is not met, the second jamming state monitoring result determines that the spring-energy-storage load switch is not jammed. If satisfied, then based on the multiple power values ​​corresponding to the motor running time and the weighted average power value corresponding to the motor running time, calculate the target power criterion value and the power difference corresponding to each power value corresponding to the motor running time. Compare the absolute values ​​of the various power differences corresponding to the motor running time with the target power criterion value; The absolute value associated with the power difference corresponding to any motor running time that is less than or equal to the target power criterion value is taken as the target power value, and the target weighted average power value corresponding to the motor running time is calculated based on the target power value corresponding to the motor running time. Determine whether the weighted average power corresponding to the motor start-up time and the target weighted average power corresponding to the motor running time satisfy the second power criterion; If the condition is not met, the second jamming state monitoring result determines that the drive motor in the spring energy storage load switch is not jammed, but the reduction device is jammed. If satisfied, then determine whether the weighted average power value corresponding to the motor running time and the weighted average power value corresponding to the motor start time satisfy the third power criterion; If the conditions are not met, the second jamming state monitoring result determines that the drive motor in the spring-energy storage load switch is jammed, while the reduction gear is not jammed. If the conditions are met, the second jamming state monitoring result is determined to be that the drive motor and the reduction gear in the spring energy storage load switch are jammed. Determine whether the weighted average power value corresponding to the spring energy storage time satisfies the fourth power criterion; If the condition is met, the third jamming state monitoring result is determined to be that the energy storage spring in the spring-type energy storage load switch is jammed. If the condition is not met, the third jamming state monitoring result determines that the energy storage spring in the spring-type energy storage load switch is not jammed.

7. A device for monitoring the jamming state of a spring-loaded load switch, characterized in that, include: The acquisition module is used to acquire multiple voltage and current signals of the drive motor in the spring energy storage type load switch, and to extract target time signals based on the multiple voltage and current signals using preset data extraction criteria, thereby determining the load switch closing action time and multiple target voltage and current signals. The preprocessing module is used to preprocess multiple target voltage and current signals based on the motor type of the drive motor and using a preset positive peak extraction rule to generate a parameter information set; The segmentation module is used to segment the closing action time of the load switch based on the preset time determination rules and the parameter information set, and to determine the motor start-up time, motor running time, and spring energy storage time. The monitoring module is used to monitor the jamming state based on the motor start-up time, the motor running time, the spring energy storage time, and the load switch closing action time, using preset jamming state diagnosis rules and the parameter information set, and generate jamming state monitoring results.

8. A computer device, characterized in that, The device includes a memory and a processor. The memory stores a computer program, which, when executed by the processor, causes the processor to perform the steps of the method for monitoring the jamming state of a spring-loaded energy storage switch as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed, it implements the method for monitoring the jamming state of a spring-loaded load switch as described in any one of claims 1-6.

10. A computer program product, characterized in that, The computer program product includes a computer program stored on a non-transitory computer-readable storage medium, the computer program including program instructions, wherein when the program instructions are executed by a computer, the computer performs the jamming state monitoring method for a spring-loaded energy storage switch as described in any one of claims 1-6.

Images