Method and device for determining service life of arc extinguish chamber, electronic equipment and storage medium

Abstract

The invention relates to the field of equipment state monitoring, and provides a method and device for determining the service life of an arc extinguish chamber, electronic equipment and a storage medium, and the method comprises the steps: detecting the opening operation of a generator circuit breaker, and obtaining a target operation parameter corresponding to the opening operation; the target operation parameters are input into a pre-trained abrasion loss determination model, target contact quality loss and target nozzle ablation depth corresponding to an arc extinguish chamber are obtained through processing of the abrasion loss determination model, and the arc extinguish chamber is a functional part in the generator circuit breaker; accumulating the target contact mass loss to obtain the total mass loss of the contact; accumulating the target nozzle ablation depths to obtain the total nozzle ablation depth amount; and determining the residual life of the arc extinguish chamber according to the total mass loss of the contact and the total ablation depth of the nozzle. According to the invention, accurate prediction of the residual life of the arc extinguish chamber is realized.

Description

Technical Field

[0001] This disclosure relates to the field of equipment condition monitoring, and in particular to a method, apparatus, electronic device, and storage medium for determining the lifespan of an arc-extinguishing chamber. Background Technology

[0002] Generator circuit breakers (GCBs) are indispensable core electrical equipment in pumped storage power stations, their importance stemming from the frequent switching between power generation, pumping, frequency regulation, and phase regulation. The primary function of a GCB is to safely and reliably connect and disconnect the electrical connection between the generator and the main transformer. It must not only carry the rated operating current but, more importantly, possess the ability to quickly and effectively interrupt short-circuit currents of up to hundreds of kiloamperes in the event of a short-circuit fault. Its operational reliability directly determines the safety status of the generator set and the main transformer, thus directly impacting the stable operation of the entire pumped storage power station and even affecting the power supply reliability and fault prevention capabilities of the regional power grid.

[0003] Due to the frequent start-ups and shutdowns of pumped storage power stations, the number of operations performed by the gas-cooled block (GCB) is far higher than that of ordinary power station switchgear. As the most critical functional component of the GCB, the arc-extinguishing chamber is subjected to the combined effects of heat, electricity, magnetism, and force over a long period of time, leading to cumulative performance degradation of its internal components. Current methods for assessing the lifespan of arc-extinguishing chambers have many problems, resulting in inaccurate lifespan evaluations. Summary of the Invention

[0004] In view of this, the purpose of this disclosure is to provide a method, apparatus, electronic device and storage medium for determining the life of an arc-extinguishing chamber, so as to solve or partially solve the above-mentioned problems.

[0005] To achieve the above objectives, a first aspect of this disclosure provides a method for determining the lifetime of an arc-extinguishing chamber, comprising: The tripping operation of the generator circuit breaker is detected, and the target operating parameters corresponding to the tripping operation are obtained. The target operating parameters are input into a pre-trained wear determination model. After processing by the wear determination model, the target contact mass loss and target nozzle ablation depth corresponding to the arc-extinguishing chamber are obtained. The arc-extinguishing chamber is a functional component in the generator circuit breaker. The total mass loss of the target contact is obtained by summing up the mass losses of the target contact. The total ablation depth of the target nozzle is obtained by summing the ablation depths of the nozzle. The remaining lifespan of the arc-extinguishing chamber is determined based on the total mass loss of the contact and the total ablation depth of the nozzle.

[0006] Based on the same inventive concept, a second aspect of this disclosure proposes a device for determining the lifespan of an arc-extinguishing chamber, comprising: The data acquisition module is configured to detect the tripping operation of the generator circuit breaker and acquire the target operating parameters corresponding to the tripping operation; The model processing module is configured to input the target operating parameters into a pre-trained wear determination model, and through the wear determination model, obtain the target contact mass loss and target nozzle ablation depth corresponding to the arc-extinguishing chamber, wherein the arc-extinguishing chamber is a functional component in the generator circuit breaker; The contact mass loss determination module is configured to accumulate the target contact mass loss to obtain the total contact mass loss; The nozzle ablation depth determination module is configured to accumulate the target nozzle ablation depth to obtain the total nozzle ablation depth. The remaining life determination module is configured to determine the remaining life of the arc-extinguishing chamber based on the total mass loss of the contact and the total ablation depth of the nozzle.

[0007] Based on the same inventive concept, a third aspect of this disclosure proposes an electronic device including a memory, a processor, and a computer program stored in the memory and executable by the processor, wherein the processor implements the method described above when executing the computer program.

[0008] Based on the same inventive concept, a fourth aspect of this disclosure provides a non-transitory computer-readable storage medium that stores computer instructions for causing a computer to perform the methods described above.

[0009] As can be seen from the above, this disclosure proposes a method, apparatus, electronic device, and storage medium for determining the lifespan of an arc-extinguishing chamber. It detects a tripping operation of a generator circuit breaker and obtains the target operating parameters corresponding to the tripping operation. The target operating parameters are input into a pre-trained wear determination model. Through processing by the wear determination model, the target contact mass loss and target nozzle ablation depth corresponding to the arc-extinguishing chamber are obtained, where the arc-extinguishing chamber is a functional component of the generator circuit breaker. The target contact mass loss and target nozzle ablation depth are determined more accurately by using the trained wear determination model after this tripping operation. The target contact mass loss is accumulated to obtain the total contact mass loss. The target nozzle ablation depth is accumulated to obtain the total nozzle ablation depth. Based on the total contact mass loss and the total nozzle ablation depth, the remaining lifespan of the arc-extinguishing chamber is determined. When a generator circuit breaker breaks, the high temperature of the electric arc melts and evaporates the contact material. Mechanical friction and vibration cause contact wear, and the material properties and the effect of the arc-extinguishing medium lead to contact loss, thus reducing the mass of the arc-extinguishing chamber contacts. Meanwhile, the nozzle isolates the moving and stationary contacts during the breaking process, withstands extremely high recovery voltages, and prevents arc reignition. With the increase in the number of breaking cycles, the inner wall of the nozzle is eroded by the high-temperature electric arc, its wall thickness gradually decreases, and the insulation distance shortens. Therefore, when determining the remaining life of the arc-extinguishing chamber, comprehensively considering the total contact mass loss and the total nozzle erosion depth provides a more accurate assessment of the remaining life. This allows for a more reasonable scheduling of maintenance plans based on the remaining life of the arc-extinguishing chamber, maximizing equipment availability and reducing operation and maintenance costs. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in this disclosure or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a flowchart of a method for determining the lifespan of an arc-extinguishing chamber according to an embodiment of this disclosure; Figure 2 This is a schematic diagram illustrating the training process of the initial wear determination model in an embodiment of this disclosure; Figure 3 This is a schematic diagram illustrating the process of determining the training dataset in an embodiment of this disclosure; Figure 4 A flowchart illustrating a method for determining the lifespan of an arc-extinguishing chamber according to another embodiment of this disclosure; Figure 5 This is a schematic diagram of the life determination device for the arc-extinguishing chamber according to an embodiment of the present disclosure; Figure 6 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present disclosure. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0013] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in the embodiments of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0014] The following are definitions of terms used in this disclosure: GCB: Generator Circuit Breaker (GCB) is an electrical device that connects a generator to a power system. It is used to control start-up and shutdown, achieve synchronous operation, and disconnect the circuit in case of a fault, ensuring the safe operation of the system.

[0015] The generator circuit breaker (GCB) is an indispensable core electrical device in pumped storage power stations. Its importance lies in the frequent switching between power generation, pumping, frequency regulation, and phase regulation operations. The main function of the GCB is to safely and reliably connect and disconnect the electrical connection between the generator and the main transformer. It not only needs to carry the rated operating current, but more importantly, it must have the ability to quickly and effectively interrupt short-circuit currents of up to hundreds of kiloamperes in the event of a short-circuit fault. Its operational reliability directly determines the safety status of the generator set and the main transformer, thus directly affecting the stable operation of the entire pumped storage power station, and even relating to the power supply reliability and fault prevention capabilities of the regional power grid.

[0016] Because pumped storage power stations start and stop frequently, the number of GCB (Gas Control Block) operations is much higher than that of ordinary power station switchgear. As the most critical functional component of the GCB, the arc-extinguishing chamber is subjected to the combined effects of heat, electricity, magnetism, and force over a long period of time, resulting in the cumulative degradation of the internal components of the arc-extinguishing chamber.

[0017] The main types of failures in arc-extinguishing chambers include: material loss and changes in contact surface morphology caused by high-temperature arc erosion in the contact system; ablation, carbonization, and even cracking of the insulating nozzles under the influence of high-temperature arc and airflow, leading to airflow distortion and decreased insulation performance; decomposition, liquefaction, or purity reduction of SF6 gas under repeated arc exposure, resulting in deterioration of insulation and arc-extinguishing performance; and mechanical failures such as jamming and insufficient overtravel of moving parts in the arc-extinguishing chamber caused by misalignment of the operating mechanism. Among these, the electrical life loss of the arc-extinguishing chamber due to the accumulation of arc energy is the most common and unavoidable progressive failure type, and a major cause of decreased breaking capacity or even breaking failure of the GCB (Gas Combustion Chamber), thus becoming a key focus of condition monitoring and intelligent operation and maintenance.

[0018] The current assessment of the lifespan of arc-extinguishing chambers mainly includes the following methods: Rough estimations based on empirical formulas and rated parameters, such as the I²t integral method, are used. The electrical life loss of a circuit breaker mainly depends on the erosion of the contact material by the arc energy during the breaking process, and the arc energy is approximately proportional to the product of the square of the current and time (I²t). This method ignores factors such as the current variability in each breaking process, environmental factors, mechanical component wear, and individual equipment differences, resulting in significant errors in the assessment results. It cannot meet the current requirements for refined operation and maintenance of pumped storage power station generator circuit breakers.

[0019] Regular, planned maintenance and disassembly inspection methods involve disassembling circuit breakers to directly observe nozzle erosion, contact wear, and other conditions. Through professional observation, flaw detection, and precision instrument measurements, accurate first-hand technical information can be obtained, including the contact erosion depth and mass loss, nozzle erosion profile and carbonization, and cracks or damage to insulating components. This data is objective, reliable, and free from inference or error, providing a comprehensive assessment. However, this method relies on post-fault diagnosis and cannot predict sudden faults, allowing only reactive handling and potentially leading to over- or under-maintenance. Furthermore, it incurs high maintenance costs and prolonged power outages, impacting the power plant's economic efficiency.

[0020] Trend analysis based on a limited number of electrical parameters (such as opening and closing time, speed, and contact resistance) is used to determine the deterioration of the mechanical condition by plotting their changes over time or number of operations. While this method can reflect the mechanical condition to some extent, it lacks a direct and effective means of monitoring the electrical wear condition of the core components inside the arc-extinguishing chamber. This approach cannot directly reflect the electrical wear condition inside the arc-extinguishing chamber, lacks the quantitative ability to predict electrical life, and is prone to generating misleading safety signals.

[0021] Based on the above description, this embodiment proposes a method for determining the lifetime of an arc-extinguishing chamber, such as... Figure 1 As shown, the method includes: Step 101: Detect the tripping operation of the generator circuit breaker and obtain the target operating parameters corresponding to the tripping operation.

[0022] Step 102: Input the target operating parameters into the pre-trained wear determination model. After processing by the wear determination model, obtain the target contact mass loss and target nozzle ablation depth corresponding to the arc extinguishing chamber. The arc extinguishing chamber is a functional component in the generator circuit breaker.

[0023] Step 103: Accumulate the target contact mass loss to obtain the total contact mass loss.

[0024] Step 104: Accumulate the target nozzle ablation depth to obtain the total nozzle ablation depth.

[0025] Step 105: Determine the remaining lifespan of the arc-extinguishing chamber based on the total mass loss of the contact and the total ablation depth of the nozzle.

[0026] In specific implementation, the tripping operation of the generator circuit breaker is detected, wherein the tripping operation includes at least one of the following: interrupting normal load, short-circuit current, and no-load. The target operating parameters corresponding to the tripping operation are obtained, wherein the target operating parameters include at least one of the following: interrupting current value, arcing time, arc voltage, etc.

[0027] The arc-extinguishing chamber is one of the core components of a generator circuit breaker, and its structural design directly affects the overall performance of the generator circuit breaker. During the operation of the generator circuit breaker, the arc-extinguishing chamber begins to function when it is necessary to disconnect the circuit. It uses a special arc-extinguishing medium and structure to elongate, cool, and eventually extinguish the electric arc, thereby ensuring that the generator circuit breaker can safely and reliably disconnect the circuit.

[0028] When a generator circuit breaker breaks, the high temperature of the electric arc melts and evaporates the contact material. Mechanical friction and vibration cause contact wear, and the material properties and the effect of the arc-extinguishing medium lead to contact loss, thus reducing the mass of the arc-extinguishing chamber contacts. Meanwhile, the nozzle isolates the moving and stationary contacts during the breaking process, withstands extremely high recovery voltage, and prevents arc reignition. With an increase in the number of breaking operations, the inner wall of the nozzle is eroded by the high-temperature electric arc, its wall thickness gradually decreases, and the insulation distance shortens.

[0029] A pre-trained wear determination model is obtained, and the target operating parameters are input into the wear determination model. The model processes the data to obtain the target contact mass loss and target nozzle ablation depth corresponding to the arc-extinguishing chamber. Specifically, the target contact mass loss is the loss amount of the contacts after the generator circuit breaker tripping operation, and the target nozzle ablation depth is the loss amount of the nozzle inner wall after the generator circuit breaker tripping operation.

[0030] The total contact mass loss is obtained by summing the target contact mass losses. Specifically, the total contact mass loss represents the total contact mass loss from the first tripping operation of the generator circuit breaker until the end of this tripping operation. Therefore, historical contact mass loss values ​​can be obtained, and these historical contact mass loss values ​​are summed with the target contact mass loss determined after this tripping operation of the generator circuit breaker to obtain the total contact mass loss. The historical contact mass loss values ​​represent the total contact mass loss before this tripping operation.

[0031] The total nozzle ablation depth is obtained by summing the target nozzle ablation depths. Specifically, the total nozzle ablation depth represents the total nozzle ablation depth from the start of the first tripping operation of the generator circuit breaker until the end of this tripping operation. Therefore, historical nozzle ablation depth values ​​can be obtained, and these historical values ​​are summed with the target nozzle ablation depth determined after this tripping operation of the generator circuit breaker to obtain the total nozzle ablation depth. The historical nozzle ablation depth values ​​are the total nozzle ablation depths before this tripping operation.

[0032] After determining the total contact mass loss and total nozzle ablation depth of the arc-extinguishing chamber, the remaining life of the arc-extinguishing chamber is determined based on these values. The remaining life represents the time the arc-extinguishing chamber can still operate normally. If the remaining life is characterized by the number of operations, then the remaining life represents the number of tripping operations of the generator circuit breaker during which the arc-extinguishing chamber can still operate normally.

[0033] The above scheme detects the tripping operation of the generator circuit breaker and obtains the target operating parameters corresponding to the tripping operation. These target operating parameters are input into a pre-trained wear determination model. The model processes these parameters to obtain the target contact mass loss and target nozzle ablation depth corresponding to the arc-extinguishing chamber, where the arc-extinguishing chamber is a functional component of the generator circuit breaker. The trained wear determination model determines the target contact mass loss and target nozzle ablation depth after this tripping operation, providing a more accurate assessment. The target contact mass loss is summed to obtain the total contact mass loss. The target nozzle ablation depth is summed to obtain the total nozzle ablation depth. Based on the total contact mass loss and the total nozzle ablation depth, the remaining lifespan of the arc-extinguishing chamber is determined. When the generator circuit breaker trips, the high temperature of the electric arc melts and evaporates the contact material. Mechanical friction and vibration cause contact wear. Material properties and the action of the arc-extinguishing medium lead to contact loss, thereby reducing the contact mass of the arc-extinguishing chamber. During the interruption process, the nozzle isolates the moving and stationary contacts and withstands extremely high recovery voltages to prevent arc reignition. With each interruption, the inner wall of the nozzle is eroded by the high-temperature arc, gradually thinning and shortening the insulation distance. Therefore, when determining the remaining life of the arc-extinguishing chamber, comprehensively considering both the total contact mass loss and the total nozzle ablation depth leads to a more accurate assessment. This allows for a more rational scheduling of maintenance plans based on the remaining life of the arc-extinguishing chamber, maximizing equipment availability and reducing operation and maintenance costs.

[0034] In some embodiments, the training process of the wear determination model includes: Step 10A: Obtain the initial training dataset, filter the initial training dataset to obtain the training dataset, wherein the training dataset includes training running data and actual arc voltage; Step 10B: Obtain the initial wear amount determination model, input the training dataset into the initial wear amount determination model, and process it through the initial wear amount determination model to obtain the training arc voltage and training wear amount value, wherein the training wear amount value includes the training contact mass loss and the training nozzle ablation depth. Step 10C: Determine the target loss function based on the training arc voltage and the actual arc voltage. In response to the convergence of the target loss function, determine that the initial wear amount determination model training is complete, and obtain the wear amount determination model.

[0035] In specific implementation, an initial training dataset is obtained, and the initial training dataset is filtered to obtain a training dataset, wherein the training dataset includes training running data and actual arc voltage.

[0036] An initial wear determination model is obtained, and the training dataset is input into the initial wear determination model. The initial wear determination model processes the data to obtain the training arc voltage and the training wear value, wherein the training wear value includes the training contact mass loss and the training nozzle ablation depth.

[0037] In this embodiment, the calibration target is anchored to measurable external electrical characteristics, so that the adjustment of the internal parameters of the complex wear determination model has a clear, objective and quantifiable basis, avoiding the blindness of parameter debugging.

[0038] The target loss function is determined based on the training arc voltage and the actual arc voltage. In response to the convergence of the target loss function, the initial wear amount determination model training is completed, and the wear amount determination model is obtained.

[0039] In this embodiment, the target loss function is determined based on the training arc voltage and the actual arc voltage. If the mean square error between the training arc voltage and the actual arc voltage is minimized, the Levenberg-Marquardt algorithm is used to iteratively adjust the key parameters in the initial wear determination model until the output and the measured data achieve the best match, thus completing the model correction and obtaining the wear determination model.

[0040] The above scheme filters the initial training dataset to ensure that the training data input to the initial wear determination model has high reliability. This avoids erroneous training data from misleading the model, which could lead to significant deviations between the target contact mass loss and target nozzle ablation depth obtained from the subsequent wear determination model and the actual values. Consequently, the life prediction of the arc-extinguishing chamber becomes inaccurate.

[0041] In some embodiments, taking the MHD model as an example, the initial wear determination model is used. Figure 2 As shown, Figure 2 The training process for the initial wear determination model in this embodiment of the disclosure specifically includes: Obtain the arc radius and current density coefficient, and calculate the initial current density distribution based on the arc radius and current density coefficient. The initial current density distribution is expressed by the formula:

[0042] in, The radius of the electric arc is the characteristic radius of the electric arc (arc root), and its unit is meters (m). is the current density coefficient, representing the peak current density at the center of the electric arc (i.e., where r=0), and is measured in amperes per square meter (A / m²). The initial current density distribution represents the axial current density at a radial distance r from the center of the arc, expressed in amperes per square meter (A / m²). r represents the radial distance between the calculation point and the central axis of the arc, expressed in meters (m).

[0043] Calculate the electromagnetic field and solve ×H=J, calculate the magnetic field B. Calculate the Lorentz force source term F=J×B, where F is a vector representing the electromagnetic force per unit volume of arc plasma, in Newtons per cubic meter (N / m³). J is a vector representing the current density vector, in amperes per square meter (A / m²), which describes the spatial distribution of the current within the arc channel. B is a vector representing the magnetic induction intensity vector, in Tesla (T), primarily referring to the magnetic field generated by the arc current itself (i.e., the self-generated magnetic field).

[0044] The Lorentz force term is then substituted into the momentum equation. Solving the momentum equation yields the flow velocity *u* and pressure *p*. The momentum equation is expressed as: ρ( u / t +u· u) = - p + ·τ +J×B Where p represents the fluid pressure, measured in Pascals (Pa). τ represents the viscous stress tensor, measured in Pascals (Pa), which describes the internal frictional stress generated by the fluid due to viscosity. J×B is the aforementioned Lorentz force, which here acts as a volume force source term driving the airflow motion.

[0045] Simultaneously, the Joule heat source term is calculated, which is expressed by the formula: Q=J·E Where Q represents the heat generated per unit volume of arc plasma per unit time, i.e., power density, measured in watts per cubic meter (W / m³). This heat is the fundamental energy source that sustains the high temperature of the arc and causes ablation of the contact and nozzle materials. J is a vector representing the current density. E is a vector representing the electric field strength, measured in volts per meter (V / m).

[0046] Calculate the radiation loss term, wherein the radiation loss term is expressed by the formula:

[0047] in, This is the radiation loss term, representing the energy lost per unit volume of arc plasma per unit time due to thermal radiation, also known as radiation power density, with units of watts per cubic meter (W / m³). The net emissivity is expressed in watts per cubic meter per steradian (W / (m³·sr)). is the radiation coefficient.

[0048] Sum Q and Substituting into the energy equation, we solve for the temperature field T, where the energy equation is expressed by the formula: ρ ( T / t+u· T)= ·(k T) ++Q

[0049] Where ρ represents the instantaneous density of the arc-extinguishing medium at a certain point in space, and the unit is kilograms per cubic meter (kg / m³). The isobaric specific heat capacity of the fluid is expressed in joules per kilogram of Kelvin (J / (kg·K)). T represents temperature, expressed in Kelvin (K). u represents the velocity vector field of the arc-extinguishing medium, expressed in meters per second (m / s). k represents the thermal conductivity of the fluid, expressed in watts per meter of Kelvin (W / (m·K)).

[0050] Among them, the convection term ρ in the energy equation u· T, where ρ represents the instantaneous density of the arc-extinguishing medium at the current location, in kilograms per cubic meter (kg / m³). The isobaric specific heat capacity of the arc-extinguishing medium at the current location is expressed in joules per kilogram per Kelvin (J / (kg·K)). u represents the velocity vector field of the arc-extinguishing medium, expressed in meters per second (m / s). T is the gradient operator for temperature T, and the result is the temperature gradient vector, with units of Kelvin per meter (K / m).

[0051] Based on the new T and p, the conductivity σ(T,p) and other physical properties of SF6 gas are updated and fed back into the calculation of the initial current density distribution, achieving strongly coupled iteration. Specifically, based on the Saha equation and the actual gas law, the conductivity of SF6 gas is expressed by the formula: σ(T,p) = f(T)·g(p) Where σ is a vector representing the electromagnetic force per unit volume of arc plasma, measured in Newtons per cubic meter (N / m³). T represents the plasma thermodynamic temperature, measured in Kelvin (K). p represents the system pressure, measured in Pascals (Pa). The thermophysical properties are temperature-pressure functions of density, specific heat, and thermal conductivity. The transport coefficient is obtained by looking up tables for viscosity and diffusion coefficient.

[0052] The training arc voltage is finally obtained by integrating ∫E·dl over the entire computational domain. .

[0053] The target loss function is determined based on the training arc voltage and the actual arc voltage, wherein the target loss function is expressed by the formula:

[0054] in, The objective loss function quantitatively describes the model for determining the initial wear amount within the parameter set. The following describes the overall deviation between the output results and the actual measured values. J( The smaller the value of ), the closer the initial wear determination model is to the real system. This represents a vector consisting of key parameters to be corrected in the model. It is the independent variable of the entire optimization process and is a set that includes turbulence constant, radiation coefficient, ablation rate constant, arc radius, etc. MSE represents mean square error. This represents the waveform of the arc voltage as a function of time calculated by the initial wear determination model with parameter set θ, expressed in volts (V). The waveform of the actual arc voltage over time, obtained experimentally from a high-speed data acquisition device, is shown, with the unit being volts (V). t represents time, with the unit being seconds (s).

[0055] If the target loss function is less than a preset threshold, then convergence is determined, and the output is... This yields the wear amount determination model and its corresponding model parameters. If the target loss function is greater than or equal to a preset threshold, the initial wear amount determination model is re-optimized.

[0056] Calculate the target loss function For each parameter partial derivatives , forming gradient vector J. Update the parameters and solve for the parameter update amount using the following formula. :

[0057] in, It is an approximation of the Hessian matrix. λ is the damping factor.

[0058] The finite difference method is used to update the parameters based on the parameter update amount. For each parameter... :

[0059] in, For the new parameter data.

[0060] Based on the new parameter data, the new training arc voltage is recalculated according to the above steps, thus obtaining... Recalculate the new losses. The process continues until the calculated new loss is less than a preset threshold, at which point the target loss function converges.

[0061] The above scheme introduces a high-fidelity multi-source information simulation model and uses sparse actual breaking data from the field to accurately calibrate the initial wear determination model. This overcomes the shortcomings of crude estimation using purely empirical formulas and inaccurate parameters in purely simulation models, achieving a high-precision assessment of the electrical life of the arc-extinguishing chamber. Furthermore, the model is promptly recalibrated after each acquisition of new actual breaking data to ensure it closely reflects the actual state of the equipment, resulting in timely assessment results. Finally, for each specific generator circuit breaker, its own actual breaking data is used for model calibration, fully considering individual equipment differences and achieving individualized health management for each unit.

[0062] The theoretical basis for this embodiment is as follows: The law of conservation of mass can be expressed by the formula: ρ / t + ·(ρu) = 0 Where ρ represents the density of the arc-extinguishing medium (such as SF6 gas), in kilograms per cubic meter (kg / m³). t represents time, in seconds (s). u (vector) represents the velocity vector of the fluid, in meters per second (m / s).

[0063] The conservation of momentum can be expressed using the formula: ρ( u / t +u· u) = - p + ·τ +J×B Where p represents the fluid pressure, measured in Pascals (Pa). τ represents the viscous stress tensor, measured in Pascals (Pa), which describes the internal frictional stress generated by the fluid due to viscosity. J×B is the aforementioned Lorentz force, which here acts as a volume force source term driving the airflow motion.

[0064] The law of conservation of energy can be expressed using the following formula: ρc_p( T / t +u· T) = ·(k T) +J·E - S_rad Where ρ represents the instantaneous density of the arc-extinguishing medium at a point in space, in kilograms per cubic meter (kg / m³). c_p represents the isobaric specific heat capacity of the fluid, in joules per kilogram of Kelvin (J / (kg·K)). T represents the temperature, in Kelvin (K). u represents the velocity vector field of the arc-extinguishing medium, in meters per second (m / s). k represents the thermal conductivity of the fluid, in watts per meter of Kelvin (W / (m·K)). J represents the current density vector, in amperes per square meter (A / m²). E represents the electric field intensity vector, in volts per meter (V / m). S_rad represents the radiative heat loss power per unit volume, in watts per cubic meter (W / m³).

[0065] The electromagnetic field equations can be expressed using the following formula: ×H =J, ×E = - B / t,J = σ(E +u×B) in, The curl operator is represented by H. The magnetic field strength vector is represented by amperes per meter (A / m). J represents the current density vector, represented by amperes per square meter (A / m²). E represents the electric field strength vector, represented by volts per meter (V / m). B represents the magnetic flux density vector, represented by tesla (T). u represents the velocity vector field of the arc-extinguishing medium, represented by meters per second (m / s).

[0066] An SF6 gas property database was established, in which the conductivity of SF6 gas, determined based on the Saha equation and the actual gas state equation, is expressed by the following formula: σ(T,p) = f(T)·g(p) Where σ (vector) represents the electromagnetic force per unit volume of arc plasma, measured in Newtons per cubic meter (N / m³). T represents the plasma thermodynamic temperature, measured in Kelvin (K). p represents the system pressure, measured in Pascals (Pa). The thermophysical properties are temperature-pressure functions of density, specific heat, and thermal conductivity, respectively. The transport coefficient is obtained by looking up tables for viscosity and diffusion coefficient.

[0067] In this embodiment, the solid material properties of the arc-extinguishing chamber are as follows: The contact material is a copper-tungsten alloy, in which the melting point, heat of vaporization, and thermal conductivity vary with temperature. The nozzle material is made of polytetrafluoroethylene, which exhibits properties such as decomposition temperature, heat of ablation, and pyrolysis gas characteristics.

[0068] In this embodiment, the boundary conditions and initial conditions are set as follows: Boundary conditions specifically include: inlet is a pressure inlet / mass flow inlet; outlet is a pressure outlet / free flow outlet. Wall slip is non-slip, and the temperature or heat flow is constant. Potential: current inlet / grounded.

[0069] The initial conditions specifically include: the initial air pressure is the rated inflation pressure, the initial temperature is the ambient temperature, and the initial flow field is either static or a preset flow field.

[0070] In this embodiment, the solver settings and numerical methods are as follows: The solution algorithm includes the SIMPLE / Coupled algorithm for pressure-velocity coupling, and a second-order upwind / QUICK scheme for spatial discretization. A second-order implicit scheme is used for time propagation.

[0071] In this embodiment, the convergence criterion uses a residual continuity of <10. -4 Energy <10 -6 Key variables monitored include arc voltage and peak pressure. Simultaneously, grid independence verification, time step independence verification, and parameter sensitivity analysis were employed. Specifically, the parameter sensitivity analysis used the Morris method or the Sobol index to analyze the impact of key parameters.

[0072] In some embodiments, the filtering process of the initial training dataset in step 10A to obtain the training dataset includes: Step 10A1: For each initial training data in the initial training dataset, obtain the timestamp and number of data points corresponding to the initial training data; Step 10A2: In response to the timestamp discontinuity and / or the number of data points being less than a preset threshold, determine that the initial training data is abnormal, and delete the initial training data; or, Step 10A3: In response to the continuous timestamps and the number of data points being greater than or equal to a preset number threshold, the initial training data is used as the target training data. Step 10A4: Statistically analyze all target training data to obtain the training dataset.

[0073] In practice, for the training data input into the initial wear determination model, the waveform of the training data must be a complete and continuous time series. Therefore, for each initial training data in the initial training dataset, the timestamp and number of data points corresponding to the initial training data are obtained, and it is checked whether the timestamps of the initial training data are continuous and whether the number of data points meets expectations.

[0074] If the timestamps are discontinuous and / or the number of data points is less than a preset threshold, it is determined that the initial training data is abnormal and cannot be used as training data to train the initial wear determination model. Therefore, the initial training data is deleted.

[0075] If the timestamps are consecutive and the number of data points is greater than or equal to a preset threshold, then the initial training data meets the requirements and is used as the target training data.

[0076] All target training data are statistically analyzed to obtain a training dataset. The initial wear amount determination model is then trained using the training dataset. Each training data point input into the initial wear amount determination model is data with continuous timestamps and a number of data points less than a preset threshold.

[0077] In some embodiments, taking the MHD model as an example, the initial wear determination model is used. Figure 3 As shown, Figure 3 The process of determining the training dataset as described in this embodiment of the disclosure specifically includes: Initial training data is acquired through a synchronous acquisition channel. This initial training data includes training operation data. Taking arc voltage and breaking current as examples, the initial training data undergoes preprocessing and storage. The initial training data consists of timestamped waveform data. Data quality verification is then performed on the initial training data, specifically by obtaining the timestamps and the number of data points corresponding to the initial training data, determining whether the timestamps are continuous, and whether the number of data points is greater than or equal to a preset threshold.

[0078] In response to the continuity of the timestamps and the number of data points being greater than or equal to a preset threshold, the initial training data is determined to be valid, the verification passes, and the arc voltage and current waveforms are output. The initial training data serves as an objective and quantifiable basis for MHD model training and correction.

[0079] In response to the discontinuity of the timestamps and / or the number of data points being less than the preset threshold, the system waits for a trigger event again. The trigger event is the tripping operation of the generator circuit breaker, specifically including normal operating condition tripping and the occurrence of an actual short-circuit fault.

[0080] When the triggering event is determined, the high-speed data acquisition system is triggered so that the high-speed data acquisition system can acquire key signals, wherein the key signals are new initial training data, and the new initial training data is also acquired through the synchronous acquisition channel.

[0081] In this embodiment, the training data may include monitoring data based on non-electrical parameters, such as vibration / acoustic signals, optical signals, pressure and temperature signals, in addition to arc voltage and breaking current. By expanding from purely electrical quantities to multi-source heterogeneous data, the data dimension is increased, thereby improving the robustness and accuracy of the model.

[0082] During the arc extinguishing process, the release of arc energy causes mechanical vibrations and sound waves of specific frequencies. Signals are collected using accelerometers or acoustic pressure sensors, and the changes in their spectral characteristics are analyzed to infer changes in contact erosion and mechanical condition. The light intensity and spectrum of the arc, such as the intensity of metal vapor spectral lines, are monitored through high-temperature resistant optical fibers or observation windows. The gas pressure and temperature inside the arc extinguishing chamber or at the nozzle are also monitored. These parameters directly reflect the flow characteristics of the arc-extinguishing medium and the energy dissipation of the arc.

[0083] In some embodiments, determining the remaining life of the arc-extinguishing chamber based on the total mass loss of the contact and the total ablation depth of the nozzle in step 105 specifically includes: Step 1051: Based on the total contact mass loss and the total nozzle ablation depth, determine the target wear parameter and the target wear value from the contact mass loss and the nozzle ablation depth, wherein the target wear value is the total contact mass loss or the total nozzle ablation depth. Step 1052: Obtain the historical wear value corresponding to the target wear parameter within a preset time period before the circuit breaker tripping operation, and determine the average historical wear value based on all historical wear values. Step 1053: Obtain the wear threshold corresponding to the target wear parameter, and subtract the wear threshold from the target wear value to obtain the wear difference value; Step 1054: The wear difference is compared with the historical average wear to obtain the remaining life of the arc-extinguishing chamber.

[0084] In practice, since both contact mass loss and nozzle ablation depth can reflect the lifespan of the arc-extinguishing chamber, to reduce subsequent calculations, one of these two factors is selected for calculating the remaining lifespan of the arc-extinguishing chamber. Specifically, based on the total contact mass loss and the total nozzle ablation depth, a target wear parameter and a target wear value are determined from these two factors. The target wear parameter is either the contact mass loss or the nozzle ablation depth.

[0085] In this embodiment, the target wear amount is either the total contact mass loss or the total nozzle ablation depth. If the target wear parameter is contact mass loss, then the target wear amount is the total contact mass loss. If the target wear parameter is nozzle ablation depth, then the target wear amount is the total nozzle ablation depth.

[0086] Obtain the historical wear value corresponding to the target wear parameter within a preset time period before the circuit breaker tripping operation. Determine the average historical wear value based on all historical wear values, that is, the sum of all historical wear values ​​is compared with the corresponding number of circuit breaker tripping operations to obtain the average historical wear value.

[0087] For example, there were a total of 8 trip operations before this trip operation. Therefore, the historical wear value corresponding to each of the 8 trip operations was obtained. The 8 historical wear values ​​were summed and then compared with the number of trip operations (8) to obtain the average wear value per operation, which is the average historical wear value.

[0088] Obtain the wear threshold corresponding to the target wear parameter, and subtract the wear threshold from the target wear value to obtain the wear difference. Ratio the wear difference to the historical average wear value to obtain the remaining lifespan of the arc-extinguishing chamber, wherein the remaining lifespan is expressed by the formula:

[0089] in, For remaining lifespan, This is the wear threshold, which can be either a mass loss threshold or an ablation depth threshold. The target wear value is specifically the total mass loss of the contact or the total ablation depth of the nozzle. This represents the historical average wear and tear.

[0090] In some embodiments, step 1051, which involves determining the target wear parameter and the target wear value based on the total contact mass loss and the total nozzle ablation depth, includes: Step 10511: Obtain the mass loss threshold corresponding to the contact mass loss, and perform ratio processing on the total contact mass loss and the mass loss threshold to obtain the first loss ratio; Step 10512: Obtain the ablation depth threshold corresponding to the nozzle ablation depth, and perform ratio processing on the total nozzle ablation depth and the ablation depth threshold to obtain the second loss ratio; Step 10513: In response to the first loss ratio being greater than or equal to the second loss ratio, determine the target wear parameter as the contact mass loss, wherein the target wear value is the total contact mass loss; or, Step 10514: In response to the first loss ratio being less than the second loss ratio, the target wear parameter is determined to be the nozzle ablation depth, and the target wear amount is the total nozzle ablation depth.

[0091] In specific implementation, a mass loss threshold corresponding to the contact mass loss is obtained, and the ratio of the total contact mass loss to the mass loss threshold is calculated to obtain a first loss ratio, wherein the first loss ratio is expressed by the formula:

[0092] in, This represents the total mass loss of the contact. This is the quality loss threshold.

[0093] Obtain the ablation depth threshold corresponding to the nozzle ablation depth, and calculate the ratio between the total nozzle ablation depth and the ablation depth threshold to obtain the second loss ratio, wherein the second loss ratio is expressed by the formula:

[0094] in, This represents the total ablation depth of the nozzle. This represents the ablation depth threshold.

[0095] If the first loss ratio is greater than or equal to the second loss ratio, that is, the total contact mass loss is greater than the total nozzle ablation depth, the contact mass loss has a greater impact on the remaining life of the arc-extinguishing chamber. Therefore, the target wear parameter is determined to be the contact mass loss, and the target wear value is the total contact mass loss.

[0096] If the first loss ratio is less than the second loss ratio, that is, the total nozzle ablation depth is greater than the total contact mass loss, the nozzle ablation depth has a greater impact on the remaining life of the arc-extinguishing chamber. Therefore, the target wear parameter is determined to be the nozzle ablation depth, and the target wear value is the total nozzle ablation depth.

[0097] In this embodiment, the target wear value is the larger value between the total contact mass loss and the total nozzle ablation depth, and the target wear value is expressed by the formula:

[0098] In some embodiments, after step 105, the method further includes: Step A: Obtain the preset remaining lifespan threshold; Step B: Compare the remaining lifetime with the remaining lifetime threshold to obtain the comparison result, and output the target prompt information based on the comparison result.

[0099] In practice, a preset remaining lifespan threshold is obtained, the remaining lifespan is compared with the remaining lifespan threshold to obtain a comparison result, and a target prompt message is output according to the comparison result. That is, the target prompt message output is different depending on the comparison result.

[0100] Specifically, the step of outputting target prompt information based on the comparison result includes: Step B01: In response to the comparison result that the remaining lifespan is less than or equal to a first preset lifespan threshold, determine the target prompt information as the first prompt information; or, Step B02: In response to the comparison result that the remaining lifespan is greater than a first preset lifespan threshold and less than or equal to a second preset lifespan threshold, determine the target prompt information as the second prompt information; or, Step B03: In response to the comparison result that the remaining lifespan is greater than the second preset lifespan threshold, the target prompt information is determined to be the third prompt information.

[0101] In specific implementation, if the comparison result shows that the remaining lifespan is less than or equal to the first preset lifespan threshold, the remaining lifespan is too low. In order to avoid subsequent safety risks, a strong and obvious prompt should be output to remind the user to arrange maintenance immediately. That is, the target prompt information at this time is the first prompt information.

[0102] If the comparison result shows that the remaining lifespan is greater than the first preset lifespan threshold and less than or equal to the second preset lifespan threshold, the target prompt information is determined to be the second prompt information, wherein the second prompt information is a high-level warning, and the user is advised to prepare maintenance resources.

[0103] If the comparison result shows that the remaining lifespan is greater than the second preset lifespan threshold, then the remaining lifespan of the arc-extinguishing chamber is relatively long and the probability of risk is relatively low. Therefore, at this time, the user can be prompted to pay attention without maintenance. That is, the target prompt information is determined to be the third prompt information.

[0104] For example, the first preset lifespan threshold is 5%, the second preset lifespan threshold is 20%, and the third preset lifespan threshold is 40%. If the remaining lifespan of the arc-extinguishing chamber is determined to be 3%, an emergency alarm is issued, and it is recommended to immediately arrange for shutdown and maintenance. If the remaining lifespan of the arc-extinguishing chamber is determined to be 15%, a high-level warning is generated, and maintenance personnel are notified, suggesting that preparation of maintenance resources, such as ordering spare parts, should begin. If the remaining lifespan of the arc-extinguishing chamber is determined to be 50%, the trend is recorded, and the user is prompted to pay attention.

[0105] Through the above solutions, and by conducting precise and dynamic electrical life assessments, maintenance personnel can accurately grasp the equipment status, scientifically arrange maintenance plans, and shift from planned maintenance to condition-based maintenance, thereby maximizing equipment availability and reducing maintenance costs.

[0106] In this embodiment, the remaining reliable operating time can be further determined, taking into account the probabilistic prediction of future operation frequency. A health degradation curve and prediction are established, forecasting the time / number of times to the future failure point. Simultaneously, a dynamically updated digital twin state mirror can be implemented, directly mapping the evaluation results back into the digital twin of the arc-extinguishing chamber.

[0107] In this embodiment, the remaining lifespan can also be represented by a health index, which is a continuous value from 0 to 100, intuitively reflecting the current health status. Alternatively, it can be represented by a risk warning level, such as normal, attention, warning, alarm, danger, etc. Both the health index and the risk warning level correspond to specific numerical values ​​of the remaining lifespan.

[0108] Based on the same inventive concept, another embodiment of this disclosure provides a method for determining the lifetime of an arc-extinguishing chamber, such as... Figure 4 As shown, the method specifically includes: By using the corrected wear determination model, simulation calculations are performed on each normal load current or no-load current interruption operation during the daily operation of the GCB. The electrical wear generated by each operation is accumulated, thereby achieving an accurate and dynamic assessment of the total electrical life of the arc-extinguishing chamber.

[0109] The wear determination model has high reliability in simulating arc combustion, airflow field, energy exchange, and material ablation. Interruption operations with normal load current or no-load current are the most frequent operations in daily GCB operation (potentially accounting for over 99% of total operations over its lifespan). Although the wear from a single interruption is small, its massive accumulation is the main cause of electrical life depletion.

[0110] Electrical abrasion refers to the material loss in the arc-extinguishing chamber (mainly the contacts and nozzles) caused by a single interruption operation, usually measured in mass (grams) or equivalent ablation thickness (millimeters). It is a physical quantity directly calculated from the abrasion determination model.

[0111] In this embodiment, the assessment is based on physical mechanisms rather than empirical estimations, and the wear determination model has been individually calibrated. Furthermore, the assessment results are updated with each actual operation, providing a real-time, living indicator of the current cumulative wear status, rather than a static snapshot taken at fixed intervals.

[0112] It should be noted that the method of this disclosure embodiment can be executed by a single device, such as a computer or server. The method of this embodiment can also be applied to a distributed scenario, where multiple devices cooperate to complete the task. In such a distributed scenario, one of these devices may execute only one or more steps of the method of this disclosure embodiment, and the multiple devices will interact with each other to complete the method described.

[0113] It should be noted that the above description describes some embodiments of this disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0114] Based on the same inventive concept, another embodiment of this disclosure proposes a device for determining the lifespan of an arc-extinguishing chamber, such as... Figure 5 As shown, it specifically includes: The data acquisition module 401 is configured to detect the tripping operation of the generator circuit breaker and acquire the target operating parameters corresponding to the tripping operation; The model processing module 402 is configured to input the target operating parameters into a pre-trained wear amount determination model, and through the wear amount determination model, obtain the target contact mass loss and target nozzle ablation depth corresponding to the arc-extinguishing chamber, wherein the arc-extinguishing chamber is a functional component in the generator circuit breaker; The contact mass loss determination module 403 is configured to accumulate the target contact mass loss to obtain the total contact mass loss; The nozzle ablation depth determination module 404 is configured to accumulate the target nozzle ablation depth to obtain the total nozzle ablation depth. The remaining life determination module 405 is configured to determine the remaining life of the arc-extinguishing chamber based on the total mass loss of the contact and the total ablation depth of the nozzle.

[0115] In some embodiments, the apparatus further includes a model training module, which is specifically configured to: Obtain an initial training dataset, filter the initial training dataset to obtain a training dataset, wherein the training dataset includes training running data and actual arc voltage; An initial wear determination model is obtained, and the training dataset is input into the initial wear determination model. The initial wear determination model processes the dataset to obtain the training arc voltage and the training wear value, wherein the training wear value includes the training contact mass loss and the training nozzle ablation depth. The target loss function is determined based on the training arc voltage and the actual arc voltage. In response to the convergence of the target loss function, the initial wear amount determination model training is completed, and the wear amount determination model is obtained.

[0116] In some embodiments, the model training module is specifically configured as follows: For each initial training data point in the initial training dataset, obtain the timestamp and number of data points corresponding to the initial training data point; In response to the discontinuity of the timestamps and / or the number of data points being less than a preset threshold, if it is determined that the initial training data is abnormal, the initial training data is deleted; or... In response to the continuity of the timestamps and the number of data points being greater than or equal to a preset threshold, the initial training data is used as the target training data. The training dataset is obtained by analyzing all target training data.

[0117] In some embodiments, the remaining lifetime determination module 405 is specifically configured to: Based on the total contact mass loss and the total nozzle ablation depth, the target wear parameter and the target wear value are determined from the contact mass loss and the nozzle ablation depth, wherein the target wear value is the total contact mass loss or the total nozzle ablation depth. Obtain the historical wear value corresponding to the target wear parameter within a preset time period before the circuit breaker operation, and determine the average historical wear value based on all historical wear values. Obtain the wear threshold corresponding to the target wear parameter, and subtract the wear threshold from the target wear value to obtain the wear difference value; The remaining lifespan of the arc-extinguishing chamber is obtained by comparing the wear difference with the historical average wear value.

[0118] In some embodiments, the remaining lifetime determination module 405 is specifically configured to: Obtain the mass loss threshold corresponding to the contact mass loss, and process the ratio of the total contact mass loss to the mass loss threshold to obtain the first loss ratio; Obtain the ablation depth threshold corresponding to the nozzle ablation depth, and perform ratio processing on the total nozzle ablation depth and the ablation depth threshold to obtain the second loss ratio; In response to the first loss ratio being greater than or equal to the second loss ratio, the target wear parameter is determined as the contact mass loss, and the target wear amount is the total contact mass loss; or... In response to the first loss ratio being less than the second loss ratio, the target wear parameter is determined to be the nozzle ablation depth, and the target wear amount is the total nozzle ablation depth.

[0119] In some embodiments, the device further includes a prompting module, which is specifically configured to: Obtain the preset remaining lifespan threshold; The remaining lifetime is compared with the remaining lifetime threshold to obtain a comparison result, and a target prompt message is output based on the comparison result.

[0120] In some embodiments, the prompting module is specifically configured as follows: In response to the comparison result indicating that the remaining lifespan is less than or equal to a first preset lifespan threshold, the target prompt message is determined to be the first prompt message; or... In response to the comparison result indicating that the remaining lifespan is greater than a first preset lifespan threshold and less than or equal to a second preset lifespan threshold, the target prompt information is determined to be the second prompt information; or, In response to the comparison result that the remaining lifespan is greater than the second preset lifespan threshold, the target prompt information is determined to be the third prompt information.

[0121] For ease of description, the above apparatus is described in terms of its functions, divided into various modules. Of course, in implementing this disclosure, the functions of each module can be implemented in one or more software and / or hardware.

[0122] The apparatus of the above embodiments is used to implement the life determination method of the corresponding arc-extinguishing chamber in any of the following embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0123] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this disclosure also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for determining the lifespan of the arc-extinguishing chamber as described in any of the above embodiments.

[0124] Figure 6This embodiment illustrates a more specific hardware structure of an electronic device. The device may include a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. The processor 1010, memory 1020, input / output interface 1030, and communication interface 1040 are interconnected internally via the bus 1050.

[0125] The processor 1010 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0126] The memory 1020 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program code is stored in the memory 1020 and is called and executed by the processor 1010.

[0127] The input / output interface 1030 is used to connect input / output modules to realize information input and output. Input / output modules can be configured as components within the device (not shown in the figure) or externally connected to the device to provide corresponding functions. Input devices may include keyboards, mice, touchscreens, microphones, various sensors, etc., while output devices may include displays, speakers, vibrators, indicator lights, etc.

[0128] The communication interface 1040 is used to connect a communication module (not shown in the figure) to enable communication between this device and other devices. The communication module can communicate via wired means (such as USB, Ethernet cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0129] Bus 1050 includes a pathway for transmitting information between various components of the device, such as processor 1010, memory 1020, input / output interface 1030, and communication interface 1040.

[0130] It should be noted that although the above-described device only shows the processor 1010, memory 1020, input / output interface 1030, communication interface 1040, and bus 1050, in specific implementations, the device may also include other components necessary for normal operation. Furthermore, those skilled in the art will understand that the above-described device may only include the components necessary for implementing the embodiments of this specification, and not necessarily all the components shown in the figures.

[0131] The electronic devices described above are used to implement the life determination method of the corresponding arc-extinguishing chamber in any of the foregoing embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0132] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this disclosure also provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the method for determining the lifetime of the arc-extinguishing chamber as described in any of the above embodiments.

[0133] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0134] The computer instructions stored in the storage medium of the above embodiments are used to cause the computer to execute the method for determining the lifespan of the arc-extinguishing chamber as described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0135] It is understood that before using the technical solutions of the various embodiments in this disclosure, users will be informed of the type, scope of use, and usage scenarios of the personal information involved in an appropriate manner, and user authorization will be obtained.

[0136] For example, upon receiving a user's active request, a prompt message is sent to the user to explicitly inform them that the requested operation will require the acquisition and use of the user's personal information. This allows the user to independently choose, based on the prompt message, whether to provide personal information to the software or hardware such as electronic devices, applications, servers, or storage media performing the operations of this disclosed technical solution.

[0137] As an optional but not limited implementation, in response to a user's active request, sending a prompt message to the user can be done via a pop-up window, where the prompt message can be presented in text format. Furthermore, the pop-up window can also include a selection control allowing the user to choose "agree" or "disagree" to provide personal information to the electronic device.

[0138] It is understood that the above notification and user authorization process are merely illustrative and do not constitute a limitation on the implementation of this disclosure. Other methods that comply with relevant laws and regulations may also be applied to the implementation of this disclosure.

[0139] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure (including the claims) is limited to these examples; within the framework of this disclosure, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this disclosure as described above, which are not provided in detail for the sake of brevity.

[0140] Additionally, to simplify the description and discussion, and to avoid obscuring the embodiments of this disclosure, the provided drawings may or may not show well-known power / ground connections to integrated circuit (IC) chips and other components. Furthermore, the apparatus may be shown in block diagram form to avoid obscuring the embodiments of this disclosure, and this also takes into account the fact that the details of implementation of these block diagram apparatuses are highly dependent on the platform on which the embodiments of this disclosure will be implemented (i.e., these details should be fully understood by those skilled in the art). While specific details (e.g., circuits) have been set forth to describe exemplary embodiments of this disclosure, it will be apparent to those skilled in the art that the embodiments of this disclosure can be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0141] Although this disclosure has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0142] This disclosure is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A method for determining the lifespan of an arc-extinguishing chamber, characterized in that, include: The tripping operation of the generator circuit breaker is detected, and the target operating parameters corresponding to the tripping operation are obtained. The target operating parameters are input into a pre-trained wear determination model. After processing by the wear determination model, the target contact mass loss and target nozzle ablation depth corresponding to the arc-extinguishing chamber are obtained. The arc-extinguishing chamber is a functional component in the generator circuit breaker. The total mass loss of the target contact is obtained by summing up the mass losses of the target contact. The total ablation depth of the target nozzle is obtained by summing the ablation depths of the nozzle. The remaining lifespan of the arc-extinguishing chamber is determined based on the total mass loss of the contact and the total ablation depth of the nozzle.

2. The method according to claim 1, characterized in that, The training process of the wear determination model includes: Obtain an initial training dataset, filter the initial training dataset to obtain a training dataset, wherein the training dataset includes training running data and actual arc voltage; An initial wear determination model is obtained, and the training dataset is input into the initial wear determination model. The initial wear determination model processes the dataset to obtain the training arc voltage and the training wear value, wherein the training wear value includes the training contact mass loss and the training nozzle ablation depth. The target loss function is determined based on the training arc voltage and the actual arc voltage. In response to the convergence of the target loss function, the initial wear amount determination model training is completed, and the wear amount determination model is obtained.

3. The method according to claim 2, characterized in that, The step of filtering the initial training dataset to obtain the training dataset includes: For each initial training data point in the initial training dataset, obtain the timestamp and number of data points corresponding to the initial training data point; In response to the discontinuity of the timestamps and / or the number of data points being less than a preset threshold, if it is determined that the initial training data is abnormal, the initial training data is deleted; or... In response to the continuity of the timestamps and the number of data points being greater than or equal to a preset threshold, the initial training data is used as the target training data. The training dataset is obtained by analyzing all target training data.

4. The method according to claim 1, characterized in that, Determining the remaining life of the arc-extinguishing chamber based on the total mass loss of the contact and the total ablation depth of the nozzle includes: Based on the total contact mass loss and the total nozzle ablation depth, the target wear parameter and the target wear value are determined from the contact mass loss and the nozzle ablation depth, wherein the target wear value is the total contact mass loss or the total nozzle ablation depth. Obtain the historical wear value corresponding to the target wear parameter within a preset time period before the circuit breaker operation, and determine the average historical wear value based on all historical wear values. Obtain the wear threshold corresponding to the target wear parameter, and subtract the wear threshold from the target wear value to obtain the wear difference value; The remaining lifespan of the arc-extinguishing chamber is obtained by comparing the wear difference with the historical average wear value.

5. The method according to claim 4, characterized in that, The step of determining the target wear parameters and target wear value based on the total contact mass loss and the total nozzle ablation depth includes: Obtain the mass loss threshold corresponding to the contact mass loss, and process the ratio of the total contact mass loss to the mass loss threshold to obtain the first loss ratio; Obtain the ablation depth threshold corresponding to the nozzle ablation depth, and perform ratio processing on the total nozzle ablation depth and the ablation depth threshold to obtain the second loss ratio; In response to the first loss ratio being greater than or equal to the second loss ratio, the target wear parameter is determined as the contact mass loss, and the target wear amount is the total contact mass loss; or... In response to the first loss ratio being less than the second loss ratio, the target wear parameter is determined to be the nozzle ablation depth, and the target wear amount is the total nozzle ablation depth.

6. The method according to claim 1, characterized in that, After determining the remaining lifespan of the arc-extinguishing chamber, the process further includes: Obtain the preset remaining lifespan threshold; The remaining lifetime is compared with the remaining lifetime threshold to obtain a comparison result, and a target prompt message is output based on the comparison result.

7. The method according to claim 6, characterized in that, The step of outputting target prompt information based on the comparison result includes: In response to the comparison result indicating that the remaining lifespan is less than or equal to a first preset lifespan threshold, the target prompt message is determined to be the first prompt message; or... In response to the comparison result indicating that the remaining lifespan is greater than a first preset lifespan threshold and less than or equal to a second preset lifespan threshold, the target prompt information is determined to be the second prompt information; or, In response to the comparison result that the remaining lifespan is greater than the second preset lifespan threshold, the target prompt information is determined to be the third prompt information.

8. A device for determining the lifespan of an arc-extinguishing chamber, characterized in that, include: The data acquisition module is configured to detect the tripping operation of the generator circuit breaker and acquire the target operating parameters corresponding to the tripping operation; The model processing module is configured to input the target operating parameters into a pre-trained wear determination model, and through the wear determination model, obtain the target contact mass loss and target nozzle ablation depth corresponding to the arc-extinguishing chamber, wherein the arc-extinguishing chamber is a functional component in the generator circuit breaker; The contact mass loss determination module is configured to accumulate the target contact mass loss to obtain the total contact mass loss; The nozzle ablation depth determination module is configured to accumulate the target nozzle ablation depth to obtain the total nozzle ablation depth. The remaining life determination module is configured to determine the remaining life of the arc-extinguishing chamber based on the total mass loss of the contact and the total ablation depth of the nozzle.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor, when executing the program, implements the method as claimed in any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium, characterized in that, The non-transitory computer-readable storage medium stores computer instructions for causing a computer to perform the method according to any one of claims 1 to 7.

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