Kiln electric cabinet health assessment method, device, equipment and related program product

Abstract

The invention relates to the technical field of kiln electric cabinets, in particular to a kiln electric cabinet health assessment method, device and equipment and related program products. The method comprises the following steps: acquiring a current operation parameter, and determining a first health score value based on the current operation parameter; obtaining a first temperature rise parameter and a second temperature rise parameter, and determining a second health score value based on the first temperature rise parameter and the second temperature rise parameter; obtaining a current harmonic distortion rate of the frequency converter, and determining a third health score value based on the current harmonic distortion rate; determining a collaborative damage value, and determining a fourth health score value based on the collaborative damage value; and performing weighted summation on the first health score value, the second health score value, the third health score value and the fourth health score value to obtain a comprehensive health score. The comprehensive health score obtained by the method can be used as an objective evaluation standard to evaluate the health degree of the kiln electric cabinet, and the problems of poor health degree evaluation accuracy and safety risk are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kiln electric cabinet, and in particular to a kiln electric cabinet health assessment method, device, equipment and related program product. BACKGROUND

[0002] In the traditional maintenance mode for kiln electric cabinet, it usually depends on fixed period inspection or human subjective experience judgment. However, the devices in the kiln electric cabinet, such as contactors, frequency converters and the like, cannot be directly judged whether there is a fault or an abnormality. The fixed period inspection cannot find the abnormal or faulty equipment in time, so that the abnormal or faulty equipment is always running, which is easy to cause the problem of safety risk of the kiln equipment system during operation. SUMMARY

[0003] The present application provides a kiln electric cabinet health assessment method, device, equipment and related program product, which can solve at least one problem in the above background.

[0004] According to an aspect of an embodiment of the present application, a kiln electric cabinet health assessment method is provided, applied to a kiln equipment system, the kiln equipment system comprising a plurality of kiln electric cabinets, the kiln electric cabinet comprising a circuit breaker, a contactor and a frequency converter, the method comprising:

[0005] obtaining a current operating parameter of the kiln electric cabinet, and determining a first health score value of the kiln electric cabinet based on the current operating parameter;

[0006] obtaining a first temperature rise parameter of the circuit breaker and a second temperature rise parameter of the frequency converter, and determining a second health score value of the kiln electric cabinet based on the first temperature rise parameter and the second temperature rise parameter;

[0007] obtaining a current harmonic distortion rate of the frequency converter, and determining a third health score value of the kiln electric cabinet based on the current harmonic distortion rate;

[0008] determining a synergistic damage value of arc ablation and dust adsorption of the contactor, and determining a fourth health score value of the kiln electric cabinet based on the synergistic damage value;

[0009] performing weighted summation on the first health score value, the second health score value, the third health score value and the fourth health score value to obtain a comprehensive health score of the kiln electric cabinet.

[0010] In the above scheme, the determination of the first health score value of the kiln electric cabinet based on the current operating parameter comprises:

[0011] determining a current effective value of the kiln electric cabinet based on the current operating parameter;

[0012] Dividing the current effective value of the kiln electric cabinet by the preset rated current value of the kiln electric cabinet, to obtain the first health score value.

[0013] In the above scheme, the second health score value of the kiln electric cabinet is determined based on the first temperature rise parameter and the second temperature rise parameter, comprising:

[0014] The current effective value, contact resistance, continuous operation time, heat dissipation coefficient and heat dissipation area of the circuit breaker are determined based on the first temperature rise parameter;

[0015] The product of the square of the current effective value of the circuit breaker, the contact resistance and the continuous operation time is divided by the product of the heat dissipation coefficient and the heat dissipation area, to obtain the first temperature rise value corresponding to the circuit breaker;

[0016] The on-state loss value, switching action loss value, junction-to-ambient thermal resistance and ambient temperature of the environment where the frequency converter is located are determined based on the second temperature rise parameter;

[0017] The second temperature rise value corresponding to the frequency converter is obtained based on the on-state loss value, the switching action loss value, the junction-to-ambient thermal resistance and the ambient temperature of the environment where the frequency converter is located;

[0018] The first temperature rise value and the second temperature rise value are weighted and summed to obtain the second health score value.

[0019] In the above scheme, the third health score value of the kiln electric cabinet is determined based on the current harmonic distortion rate, comprising:

[0020] The fundamental current effective value and the hth harmonic current effective value of the frequency converter are determined;

[0021] The current harmonic distortion rate is determined according to the preset harmonic number, the fundamental current effective value and the hth harmonic current effective value;

[0022] The value of the current harmonic distortion rate is taken as the third health score value;

[0023] Wherein, the preset harmonic number is N, and h is less than or equal to N.

[0024] In the above scheme, the kiln electric cabinet further comprises a laser dust sensor, and the fourth health score value of the kiln electric cabinet is determined based on the cooperative damage value, comprising:

[0025] The current peak value of the contact when the contact is actuated and the arc ablation coefficient of the contactor are determined;

[0026] determine a first damage value of the contactor according to the electric arc ablation coefficient and the current peak value;

[0027] determine a dust concentration collected by the laser dust sensor, an internal temperature of the kiln electric cabinet, and a synergistic wear coefficient of dust and temperature;

[0028] determine a second damage value according to the dust concentration, the internal temperature, and the synergistic wear coefficient;

[0029] determine the synergistic damage value based on the first damage value and the second damage value;

[0030] take the synergistic damage value as the fourth health score value.

[0031] In the above scheme, the method further comprises:

[0032] for each kiln electric cabinet, determine a device fault type of the kiln electric cabinet, and determine a quantitative score of the kiln electric cabinet based on the device fault type;

[0033] determine an overall maintenance score factor based on the comprehensive health score and the quantitative score of each kiln electric cabinet;

[0034] for each kiln electric cabinet, divide the quantitative score of the kiln electric cabinet by the product of the health score of the kiln electric cabinet and the overall maintenance score factor, to obtain a maintenance priority score of the kiln electric cabinet;

[0035] determine a maintenance order of each kiln electric cabinet based on the maintenance priority score;

[0036] maintain the kiln electric cabinet according to the maintenance order.

[0037] In the above scheme, the kiln electric cabinet further comprises a PLC power supply, and the method further comprises:

[0038] determine a preset service life value of a capacitance of the PLC power supply at a preset rated temperature and a preset rated voltage;

[0039] determine a working temperature value and a working voltage value of the PLC power supply;

[0040] determine a service life prediction value of the PLC power supply according to the preset service life value, the working temperature value, and the working voltage value.

[0041] According to an aspect of an embodiment of the present application, a kiln electric cabinet health evaluation device is provided, which is applied to a kiln equipment system, the kiln equipment system comprising a plurality of kiln electric cabinets, the kiln electric cabinet comprising a circuit breaker, a contactor, and a frequency converter, and the device comprising:

[0042] The first acquisition unit is configured to acquire a current operation parameter of the kiln electric cabinet, and determine a first health score value of the kiln electric cabinet based on the current operation parameter.

[0043] The second acquisition unit is configured to acquire a first temperature rise parameter of the circuit breaker and a second temperature rise parameter of the frequency converter, and determine a second health score value of the kiln electric cabinet based on the first temperature rise parameter and the second temperature rise parameter.

[0044] The third acquisition unit is configured to acquire a current harmonic distortion rate of the frequency converter, and determine a third health score value of the kiln electric cabinet based on the current harmonic distortion rate.

[0045] The determination unit is configured to determine a synergistic damage value of arc ablation and dust adsorption of the contactor, and determine a fourth health score value of the kiln electric cabinet based on the synergistic damage value.

[0046] The health assessment unit is configured to determine a comprehensive health score of the kiln electric cabinet based on the first health score value, the second health score value, the third health score value and the fourth health score value.

[0047] According to an aspect of an embodiment of the present application, an electronic device is provided, comprising a memory and a processor, the memory stores a computer program, and the processor executes the computer program to implement the kiln electric cabinet health assessment method as described above.

[0048] According to an aspect of an embodiment of the present application, a computer program product is provided, comprising a computer program, the computer program is read and executed by a processor of an electronic device, so that the electronic device executes the kiln electric cabinet health assessment method as described above.

[0049] The present application has the beneficial effects that: a plurality of damage factors (current, temperature rise, synergistic damage, current harmonic distortion rate, etc.) are comprehensively evaluated to comprehensively evaluate the health degree of the kiln electric cabinet, and the comprehensive health score obtained can be used as an objective evaluation standard to evaluate the health degree of the kiln electric cabinet, thereby solving the problems of inaccurate fault detection, poor accuracy of health degree evaluation and safety risk caused by fixed period inspection or subjective experience judgment in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 is a system architecture diagram to which the kiln electric cabinet health assessment method provided by the embodiment of the present application is applied;

[0051] Figure 2 is a flowchart of the kiln electric cabinet health assessment method provided by the embodiment of the present application;

[0052] Figure 3A logic architecture diagram of the kiln electric cabinet health assessment method provided by the embodiment of the present application is shown in FIG. 1.

[0053] Figure 4 A block diagram of the kiln electric cabinet health assessment device provided by the embodiment of the present application is shown in FIG. 2.

[0054] Figure 5 A structural schematic diagram of a terminal provided by the embodiment of the present application is shown in FIG. 3.

[0055] Figure 6 A structural schematic diagram of a server provided by the embodiment of the present application is shown in FIG. 4. DETAILED DESCRIPTION

[0056] In order to enable personnel in the art to better understand the schemes of the present application, the technical schemes in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0057] It should be noted that in some processes described in the specification, claims and the above drawings, a plurality of steps appear in a specific order, but it should be clearly understood that these steps can be executed or performed in parallel, not in the order in which they appear in this text, and the step number is only used to distinguish different steps, and the number itself does not represent any execution order. In addition, the descriptions such as "first", "second" or "target" in this text are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. "Multiple" in this text means at least two.

[0058] It should be noted that in the detailed description of the present application, the relevant data of the electric energy data (such as current, voltage) of the kiln electric cabinet, the sensing data (such as dust concentration, temperature) and the like are involved. When the above embodiments of the present application are applied to specific products or technologies, the permission or consent of the target object is required, and the collection, use and processing of the relevant data need to comply with relevant laws, regulations and standards. For example, when the embodiments of the present application need to obtain the relevant data of the electric energy data and sensing data of the kiln electric cabinet, the separate permission or separate consent of the target object can be obtained through a pop-up window or jumping to a confirmation page, and after obtaining the separate permission or separate consent of the target object, the necessary electric energy data and sensing data of the kiln electric cabinet for the normal operation of the embodiments of the present application are obtained.

[0059] Please refer to Figure 1 , Figure 1Fig. 1 is a system architecture diagram applied by a kiln electric cabinet health assessment method provided by an embodiment of the present application. It comprises a terminal 140, an Internet 130, a gateway 120, a server 110, etc.

[0060] The terminal 140 comprises desktop computers, laptop computers, PDAs (personal digital assistants), mobile phones, vehicle-mounted terminals, special-purpose terminals, etc. In addition, it can be a single device or a combination of multiple devices. For example, multiple desktop computers are connected to each other through a local area network and work cooperatively by sharing a display, etc., to jointly constitute a terminal 140. The terminal 140 can communicate with the Internet 130 in a wired or wireless manner to exchange data.

[0061] The server 110 refers to a computer system capable of providing certain services to the terminal 140. Compared with the ordinary terminal 140, the server 110 has higher requirements in stability, security, performance, etc. The server 110 can be a high-performance computer in a network platform, a cluster of multiple high-performance computers, a part of a high-performance computer (such as a virtual machine), a combination of parts of multiple high-performance computers (such as virtual machines), etc. The server 110 can also communicate with the Internet 130 in a wired or wireless manner to exchange data.

[0062] The gateway 120 is also known as an inter-network connector or a protocol converter. The gateway realizes network interconnection at the transport layer and is a computer system or device that acts as a conversion role. In the case of two systems using different communication protocols, data formats or languages, or even having completely different architectures, the gateway is a translator. At the same time, the gateway can also provide filtering and security functions. The messages sent by the terminal 140 to the server 110 are sent to the corresponding server 110 through the gateway 120. The messages sent by the server 110 to the terminal 140 are also sent to the corresponding terminal 140 through the gateway 120.

[0063] The specific embodiments of the present application are described in detail below:

[0064] Please refer to Figure 2 , Figure 2 Fig. 2 is a flowchart of a kiln electric cabinet health assessment method provided by an embodiment of the present application. The kiln electric cabinet health assessment method can be realized by the server 110 and / or the terminal 140. The kiln electric cabinet health assessment method is applied to a kiln equipment system, which comprises multiple kiln electric cabinets. The kiln electric cabinet comprises a circuit breaker, a contactor and a frequency converter. Figure 2 The kiln electric cabinet health assessment method shown comprises:

[0065] In step 210, the current operating parameters of the kiln electric cabinet are acquired, and a first health score value of the kiln electric cabinet is determined based on the current operating parameters.

[0066] Step 220, obtaining the first temperature rise parameter of the circuit breaker and the second temperature rise parameter of the frequency converter, and determining the second health score value of the kiln electric cabinet based on the first temperature rise parameter and the second temperature rise parameter;

[0067] Step 230, obtaining the current harmonic distortion rate of the frequency converter, and determining the third health score value of the kiln electric cabinet based on the current harmonic distortion rate;

[0068] Step 240, determining the synergistic damage value of arc ablation and dust adsorption of the contactor, and determining the fourth health score value of the kiln electric cabinet based on the synergistic damage value;

[0069] Step 250, weighted sum of the first health score value, the second health score value, the third health score value and the fourth health score value to obtain the comprehensive health score of the kiln electric cabinet.

[0070] The complete embodiment scheme of the present application is explained in detail in combination with steps 210-250 as follows:

[0071] The present application proposes a kiln equipment system composed of multiple kiln electric cabinets. The kiln electric cabinet refers to the control system of the kiln equipment. The kiln electric cabinet has various electrical devices that can enable the kiln equipment to work normally under electrical control. In the kiln electric cabinet, there are electrical devices such as circuit breakers, contactors, frequency converters, PLC power supplies, etc.

[0072] Specifically, the current running parameter of the kiln electric cabinet is obtained. The current running parameter can assist in judging the health degree of the kiln electric cabinet. For example, if the current value is too large during operation, the first health score value can be reduced. Therefore, the first health score value related to the current running of the kiln electric cabinet can be determined by the current running parameter.

[0073] In some embodiments, the first health score value of the kiln electric cabinet is determined based on the current running parameter, comprising:

[0074] The current effective value of the kiln electric cabinet is determined based on the current running parameter;

[0075] The current effective value of the kiln electric cabinet is divided by the preset rated current value of the kiln electric cabinet to obtain the first health score value.

[0076] Specifically, the current effective value of the kiln electric cabinet can be I mrepresents the effective value of the current of the kiln electric cabinet, represents the actual load intensity of the actual kiln electric cabinet, the unit is ampere (A), the greater the effective current value, the more significant the joule heat loss, which will accelerate the aging of the element or device, therefore, the effective value of the current of the kiln electric cabinet is considered in the first health score value, which can effectively analyze the health degree of the kiln electric cabinet. rated , that is, the preset rated current of the kiln electric cabinet, which represents the maximum current value that the kiln electric cabinet allows to run safely for a long time, the unit is ampere (A). Therefore, the effective value of the current of the kiln electric cabinet is divided by the preset rated current value of the kiln electric cabinet, and the first health score value can be obtained.

[0077] In step 220, the second health score value of the kiln electric cabinet can be obtained by comprehensively considering the first temperature rise parameter of the circuit breaker and the second temperature rise parameter of the frequency converter.

[0078] In some embodiments, the second health score value of the kiln electric cabinet is determined based on the first temperature rise parameter and the second temperature rise parameter, comprising:

[0079] determining the effective value of the current, the contact resistance, the continuous running time, the heat dissipation coefficient and the heat dissipation area of the circuit breaker based on the first temperature rise parameter;

[0080] dividing the product of the square of the effective value of the current, the contact resistance and the continuous running time of the circuit breaker by the product of the heat dissipation coefficient and the heat dissipation area to obtain the first temperature rise value corresponding to the circuit breaker;

[0081] determining the on-state loss value, the switching action loss value, the junction-to-ambient thermal resistance and the ambient temperature of the environment where the frequency converter is located based on the second temperature rise parameter;

[0082] obtaining the second temperature rise value corresponding to the frequency converter based on the on-state loss value, the switching action loss value, the junction-to-ambient thermal resistance and the ambient temperature of the environment where the frequency converter is located;

[0083] weighting and summing the first temperature rise value and the second temperature rise value to obtain the second health score value.

[0084] Specifically, referring to the following formula, the first temperature rise value related to the circuit breaker can be obtained:

[0085]

[0086] In the formula, I rms is the effective value of the current of the circuit breaker (unit: A)

[0087] R contact : contact resistance of the contact of the circuit breaker (unit: Ω)

[0088] t oper : Continuous operating time of the circuit breaker (unit: hour)

[0089] h: Heat dissipation coefficient of the circuit breaker (unit: W / (m 2 ·K)

[0090] A: Heat dissipation area of the circuit breaker (unit: m 2 ), effective heat dissipation surface area of the conductive part (such as busbar, conductor connection surface) directly connected with the contact of the circuit breaker. In the design of the circuit breaker, the temperature rise ΔT can be reduced and the current carrying capacity can be improved by increasing the heat dissipation area A (such as increasing heat dissipation fins).

[0091] Definition: T1 is the difference between the actual temperature of the contact of the circuit breaker and the ambient temperature. Unit: Celsius (℃) or Kelvin (K).

[0092] T1 represents the temperature rise of the contact of the circuit breaker due to the Joule heat generated by the current passing through. Excessive temperature rise will accelerate the oxidation of the contact, increase the contact resistance, and even cause welding failure.

[0093] Specifically, referring to the following formula, a second temperature rise value related to the frequency converter can be obtained:

[0094] T j = T amb + R th(j-1) ·(V CE ·I avg +f sw ·E sw )

[0095] T amb : Ambient temperature of the environment in which the frequency converter is located (unit: ℃)

[0096] R th(j-a) : Junction-to-ambient thermal resistance (unit: ℃ / W)

[0097] f sw : Switching frequency (unit: kHz)

[0098] E sw : Single switching loss (unit: J)

[0099] The switching action loss value represents the product of f sw and E sw , and the conduction loss value represents the product of V CE and I avg . T j is the second temperature rise value, which serves to evaluate the over-temperature risk of the frequency converter and prevent thermal failure. The junction temperature (second temperature rise value) directly affects the reliability of the frequency converter, and T j<150℃ (industrial grade IGBT); the junction temperature (second temperature rise value) is too high, which will cause thermal failure (such as solder layer peeling, chip burning).

[0100] V CE The voltage drop between the collector (C) and the emitter (E) of the frequency converter (i.e. IGBT module), unit: volt (V).

[0101] Features: slightly increases with the increase of current I avg (e.g. I avg = 50A, V CE ≈ 2.1V; related to IGBT chip material and process (e.g. V CE of silicon-based IGBT is usually higher than that of silicon carbide devices).

[0102] Iavg: average conduction current, defined: the average current value of IGBT in one switching cycle, unit: ampere (A). The formula calculates the actual junction temperature T CE of IGBT chip (i.e. the second temperature rise value) by quantifying the conduction loss value (V avg × I sw ) and the switching action loss value (f sw × E th(j-a) ), combined with thermal resistance R j . By accurately calculating Tj, the overheat damage of IGBT (the core device of the frequency converter) can be effectively avoided, and the service life of the frequency converter can be prolonged.

[0103] Therefore, the second health score value is obtained by weighting and summing the first temperature rise value and the second temperature rise value, that is, by comprehensively considering the temperature rise parameters of the circuit breaker and the frequency converter. The weighting coefficients corresponding to the first temperature rise value and the second temperature rise value can be set by oneself, and in the embodiments of the present application, the weighting coefficient of the first temperature rise value can be set to 0.4, and the weighting coefficient of the second temperature rise value can be set to 0.6, that is, the second health score value (denoted by ΔT) = first temperature rise value × 0.4 + second temperature rise value × 0.6.

[0104] In step 230, the current harmonic distortion rate is used to quantify the degree of deviation of the current waveform from the sine wave, reflecting the level of power grid pollution caused by the switching action of the frequency converter. Referring to the following formula, the third health score value of the kiln electric cabinet can be obtained:

[0105]

[0106] I1 (the fundamental current effective value of the frequency converter), the fundamental current is the effective value of the component in the current signal whose frequency is consistent with the power frequency (50Hz), representing the main current component required for the normal operation of the electrical device, which is the main component in the current waveform.

[0107] Ih (hth harmonic current effective value, h≤N), the effective value of the harmonic component in the current signal with an integer multiple (h×f1) of the fundamental frequency. For example, the 3rd harmonic is 150 Hz (if the fundamental frequency is 50 Hz), and f1 is the fundamental frequency.

[0108] N (the highest harmonic order, that is, the preset harmonic order described in the present application), the highest harmonic order analyzed, which is usually N=50 in the embodiments of the present application. Higher harmonic energy is smaller and the influence is negligible.

[0109] (harmonic component square sum), the square sum of the current effective values from the 2nd harmonic to the Nth harmonic. It characterizes the cumulative effect of total harmonic energy.

[0110] The current collection of the harmonic analyzer is usually located at the following positions:

[0111] 1. The main power input terminal of the kiln electric cabinet, which monitors the harmonic pollution level of the overall kiln electric cabinet and evaluates the impact on the power grid. Example: current at the input side of the frequency converter, which is used to analyze its reverse harmonic injection to the power grid.

[0112] 2. Key load branch circuit, which independently analyzes the harmonic emission characteristics of specific equipment (such as frequency converters and high-power switching power supplies).

[0113] In step 240, the kiln electric cabinet further includes a laser dust sensor, and the fourth health score value of the kiln electric cabinet is determined based on the synergistic damage value, which comprises:

[0114] determining the current peak value of the contactor when the contact is in action and the arc ablation coefficient of the contactor;

[0115] determining the first damage value of the contactor according to the arc ablation coefficient and the current peak value;

[0116] determining the dust concentration collected by the laser dust sensor, the internal temperature of the kiln electric cabinet, and the synergistic wear coefficient of dust and temperature;

[0117] determining the second damage value according to the dust concentration, the internal temperature, and the synergistic wear coefficient;

[0118] determining the synergistic damage value based on the first damage value and the second damage value;

[0119] taking the synergistic damage value as the fourth health score value.

[0120] Specifically, referring to the following formula, the fourth health score value of the kiln electric cabinet can be obtained:

[0121]

[0122] N oper : cumulative number of operations of the contactor, which can be obtained by counting the operation signals of the auxiliary contact or the Hall sensor.

[0123] I n : current peak value at the nth operation (unit: A)

[0124] C dust : dust concentration obtained by the laser dust sensor (unit: mg / m 3 )

[0125] k1 = 5 * 10 -6 : arc ablation coefficient of the contactor's contact. Current-dependent arc ablation coefficient (unit: mm / (A2·times)), which represents the ablation effect of current on the contact in a single on-off operation.

[0126] k2 = 0.02: synergistic wear coefficient of dust and temperature (unit: mm / (mg·℃·m 3 ·hour)), which quantifies the accelerated effect of dust adsorption and high temperature on contact oxidation.

[0127] T in : internal temperature of the kiln electric cabinet (unit: ℃).

[0128] W is the synergistic damage value, i.e., the fourth health score value: quantifying the synergistic damage of arc ablation and dust adsorption.

[0129] W can also represent the cumulative wear amount of the contact material, usually quantified by thickness loss (unit: millimeters or microns) or volume loss (unit: mm 3 ). Its physical meaning is: the total amount of material loss of the contact due to arc ablation, mechanical friction, and environmental factors (dust, temperature).

[0130] W can be used for life prediction of the contactor's contact: when W reaches the maximum allowed wear amount W max of the contact material (such as 0.5 mm), the contact needs to be replaced.

[0131] 2 Failure warning:

[0132] Abnormal wear: if the wear rate dW / dt suddenly increases, abnormal conditions such as abnormal load current (such as motor stall), excessive dust concentration, poor heat dissipation leading to high contact temperature, etc. may occur.

[0133] Maintenance decisions can be made according to W, for example, based on the real-time monitoring value of W, the maintenance period can be dynamically adjusted: regular maintenance: W < 0.3W max ; advance maintenance: W > 0.7Wmax or dW / dt> preset threshold (the preset threshold can be customized) triggers a warning, timely reminding the staff to maintain.

[0134] In step 250, after obtaining the first health score value, the second health score value, the third health score value and the fourth health score value, a weighted sum is performed using the following formula to obtain the comprehensive health score H of the kiln electric cabinet:

[0135]

[0136] In the formula, w1=0.3, w2=0.3, w3=0.2, and w4=0.2 (which are preset weight coefficients, i.e., the contribution weight of each damage factor, which is calibrated by principal component analysis).

[0137] In some embodiments, the kiln electric cabinet further comprises a PLC power supply, and the method further comprises:

[0138] determining a preset life value of the capacitance of the PLC power supply under a preset rated temperature and a preset rated voltage;

[0139] determining a working temperature value and a working voltage value of the PLC power supply;

[0140] determining a life prediction value of the PLC power supply according to the preset life value, the working temperature value and the working voltage value.

[0141] Specifically, the PLC power supply as the core power supply device of the kiln electric cabinet, its health status will also affect the health degree of the kiln electric cabinet, wherein,

[0142] L cap : the capacitance life of the PLC power supply, that is, the expected service life under certain conditions.

[0143] L0: the design life of the capacitance under a preset rated temperature T0 and a preset rated voltage V rated , that is, the preset life value of the present application (unit: hour), which represents the battery durability under ideal working conditions.

[0144] T0: the preset rated temperature, the reference temperature marked by the capacitor manufacturer, which is usually the highest temperature that the capacitor can tolerate for a long time, unit: Celsius (℃), typical value 105℃ (high-temperature electrolytic capacitor), 85℃ (ordinary type).

[0145] T in : the actual working temperature value, the real-time temperature inside the PLC power supply module, which directly affects the aging rate of the capacitor. Unit: Celsius (℃), which can be monitored by a temperature sensor, and temperature rise accelerates the evaporation of electrolyte and the degradation of the oxidation film.

[0146] V rated : rated voltage, the maximum voltage that the capacitor can safely work for a long time, unit: volt (V), voltage exceeding will cause insulation breakdown or a sharp increase in leakage current.

[0147] V actual : actual working voltage (unit: V), the actual voltage that the capacitor bears in the circuit, usually lower than or equal to Vrated.

[0148] Effect: predict the life of the capacitor and avoid sudden failure.

[0149] In some embodiments, the life prediction value of the PLC power supply can also be used as the fifth health score value of the kiln electric cabinet, and the first health score value, the second health score value, the third health score value, the fourth health score value and the fifth health score value can be weighted and summed to obtain a comprehensive health score of the kiln electric cabinet. Then the formula of the comprehensive health score is as follows:

[0150] w1 = 0.3, w2 = 0.3, w3 = 0.15, w4 = 0.15, w5 = 0.1.

[0151] In some embodiments, the method further comprises:

[0152] For each of the kiln electric cabinets, determining the equipment failure type of the kiln electric cabinet, and determining the quantitative score of the kiln electric cabinet based on the equipment failure type;

[0153] Based on the comprehensive health score and the quantitative score of each of the kiln electric cabinets, determining an overall maintenance score factor;

[0154] For each of the kiln electric cabinets, dividing the quantitative score of the kiln electric cabinet by the product of the health score of the kiln electric cabinet and the overall maintenance score factor to obtain a maintenance priority score of the kiln electric cabinet;

[0155] Based on the maintenance priority score, determining the maintenance order of each of the kiln electric cabinets;

[0156] According to the maintenance order, maintaining the kiln electric cabinets.

[0157] Since the kiln equipment system includes multiple kiln electric cabinets, when the number of maintenance personnel is insufficient, the priority method can be used for maintenance, which can further reduce labor costs. First, each kiln electric cabinet has its corresponding quantitative score, which is represented by C i i represents the i-th kiln electric cabinet, and the overall maintenance score factor can be represented by the following formula: Among them, j represents a total of j kiln electric cabinets that have failed, i≤j, then the maintenance priority score P of each kiln electric cabinet i It can be expressed as the following formula:

[0158]

[0159] C i : Failure consequence coefficient (i.e., the quantitative score of the kiln electric cabinet determined by the equipment failure type), the quantitative score of the impact of the i-th kiln electric cabinet failure on production, safety, cost, etc., usually calibrated by experience or historical data. For example, if a PLC power failure occurs, C i =10, causing the entire production line to stop. Circuit breaker failure, C ii =8, local power outage risk. Contactor failure, C i =5, only affects local heat dissipation.

[0160] H i : The comprehensive health score of the i-th kiln equipment, ranging from 0 to 100, is calculated based on factors such as current, harmonics, temperature rise, and synergistic damage. i The smaller the value, the worse the health of the device and the more urgent the maintenance needs. The inverse of Hi converts the health score into "health risk" and increases the priority of low-scoring devices.

[0161] P i Maintenance priority: The maintenance priority score for the i-th device, ranging from 0 to 1, where larger values ​​indicate greater maintenance urgency. By calculating the maintenance priority, we determine the order of each device in the global maintenance queue and optimize resource allocation.

[0162] Reference Figure 3 As shown, Figure 3 This is the overall logical architecture diagram of this application, which includes multiple sensors and health score prediction models, which are used to be deployed in edge computing units to calculate comprehensive health scores.

[0163] Current monitoring:

[0164] Hall sensor acquisition I rms and I m , calculate the load rate η=I rms / I rated *100% or η=I m / I rated *100%

[0165] The harmonic analyzer measures the current harmonic distortion rate.

[0166] Environmental monitoring:

[0167] Laser dust sensor output Cdust (unit: mg / m 3 ), temperature and humidity sensor outputs various temperature data.

[0168] Edge computing layer processing:

[0169] Real-time early warning

[0170] Overload warning: when η>110% and lasts for t>10min, trigger the load reduction instruction.

[0171] Voltage sag protection: when ΔU=(Unominal-Udip / Unominal)*100%>15%, start the UPS switching logic.

[0172] Unominal: nominal voltage, the rated voltage value of the power grid or power supply system, usually the standard working voltage designed for the device, as a reference value for measuring the magnitude of voltage sag.

[0173] Udip: voltage sag effective value, the actual effective value of voltage during voltage sag event, which can be collected in real time by voltage sensor, this variable reflects the severity of voltage sag, and is the direct basis for triggering protection action.

[0174] ΔU: voltage sag depth, the difference between nominal voltage and sag voltage as a percentage of nominal voltage, the larger ΔU, the more serious the voltage drop, when ΔU>15%, it is determined as a significant sag event, which needs to start the protection logic.

[0175] Multiple sensors collect the required data in the kiln electric cabinet, then the gateway forwards the data to the edge computing unit, and the edge computing unit and the cloud interact with each other. The health score prediction model is deployed on the edge computing unit and the cloud platform, and the edge computing unit and the cloud platform notify the workers of the comprehensive health score of the kiln electric cabinet and trigger an early warning reminder when the score is low.

[0176] The embodiments of the present application comprehensively evaluate the health degree of the kiln electric cabinet by comprehensively considering various damage factors (current, temperature rise, synergistic damage, current harmonic distortion rate, power supply life, etc.), which can accurately analyze the health degree of the kiln electric cabinet and timely remind maintenance personnel to maintain, and the beneficial effects involved are as follows:

[0177] 1. Multi-physical field coupling modeling: quantifying the comprehensive damage of current-dust-temperature-current harmonic distortion rate;

[0178] 2. Dynamic threshold adjustment: comprehensive health score H reflects cumulative damage in real time, replacing fixed period maintenance;

[0179] 3. Different electrical devices are treated differently (i.e. different parameters are used to obtain their corresponding health score values): special models are designed for PLC capacitor life and frequency converter IGBT junction temperature;

[0180] 4. Lightweight deployment: the edge computing unit only transmits feature parameters (such as the comprehensive health score H), and the bandwidth requirement is <5 kB / hour.

[0181] The present application realizes the upgrade of kiln electric cabinet maintenance from "post-failure maintenance" to "state-driven" through the fusion of mechanism model and real-time data.

[0182] Please refer to Figure 4 , Figure 4 The structure diagram of the kiln electric cabinet health assessment device 300 provided by the embodiment of the present application is shown in the figure. The kiln electric cabinet health assessment device 300 is applied to a computer device, wherein the kiln electric cabinet health assessment device 300 can include:

[0183] The first acquisition unit 301 is configured to acquire the current operating parameter of the kiln electric cabinet, and determine the first health score value of the kiln electric cabinet based on the current operating parameter;

[0184] The second acquisition unit 302 is configured to acquire the first temperature rise parameter of the circuit breaker and the second temperature rise parameter of the frequency converter, and determine the second health score value of the kiln electric cabinet based on the first temperature rise parameter and the second temperature rise parameter;

[0185] The third acquisition unit 303 is configured to acquire the current harmonic distortion rate of the frequency converter, and determine the third health score value of the kiln electric cabinet based on the current harmonic distortion rate;

[0186] The determination unit 304 is configured to determine the synergistic damage value of the arc ablation and dust adsorption of the contactor, and determine the fourth health score value of the kiln electric cabinet based on the synergistic damage value;

[0187] The health assessment unit 305 is configured to determine the comprehensive health score of the kiln electric cabinet based on the first health score value, the second health score value, the third health score value and the fourth health score value.

[0188] Refer to Figure 5 , Figure 5To implement the structural block diagram of part of the terminal 140 of the embodiment of the present application, the terminal 140 includes: a radio frequency (RF) circuit 710, a memory 715, an input unit 730, a display unit 740, a sensor 750, an audio circuit 760, a wireless fidelity (WiFi) module 770, a processor 780, and a power supply 790. Those skilled in the art will understand that Figure 5 The illustrated structure of the terminal 140 does not limit the structure of a mobile phone or a computer, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0189] The RF circuit 710 may be used for receiving and sending signals during information transmission or calls. In particular, after receiving downlink information from the base station, it is sent to the processor 780 for processing. In addition, the designed uplink data is sent to the base station.

[0190] The memory 715 may be used to store software programs and modules. The processor 780 executes various functional applications of the terminal and health assessment processing of the kiln electrical cabinet by running the software programs and modules stored in the memory 715 .

[0191] The input unit 730 may be configured to receive input digital or character information and generate key signal input related to terminal settings and function control. Specifically, the input unit 730 may include a touch panel 731 and other input devices 732 .

[0192] The display unit 740 may be configured to display input information or provided information and various menus of the terminal. The display unit 740 may include a display panel 741 .

[0193] The audio circuit 760 , the speaker 761 , and the microphone 762 may provide an audio interface.

[0194] In the embodiment of the present application, the processor 780 included in the terminal 140 can execute the kiln electrical cabinet health assessment method of the previous embodiment.

[0195] The terminal 140 of the embodiment of the present application includes but is not limited to mobile phones, computers, intelligent voice interaction devices, smart home appliances, vehicle terminals, aircraft, etc. The embodiment of the present application can be applied to various scenarios, including but not limited to cloud technology, artificial intelligence, smart transportation, assisted driving, etc.

[0196] Figure 6A structure block diagram of a part of the server 110 of the embodiment of the present application is shown in FIG. 8. The server 110 can vary greatly in configuration or performance, and can include one or more central processing units (CPUs) 822 (e.g., one or more processors) and a memory 832, one or more storage media 830 (e.g., one or more mass storage devices) storing applications 842 or data 844. The memory 832 and the storage media 830 can be volatile or non-volatile storage. The programs stored in the storage media 830 can include one or more modules (not shown in the figure), each of which can include a series of instructions operative on the server 110. Further, the central processing unit 822 can be configured to communicate with the storage media 830 and execute the series of instructions operative on the server 110.

[0197] The server 110 can also include one or more power supplies 826, one or more wired or wireless network interfaces 850, one or more input / output interfaces 858, and / or one or more operating systems 841, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, etc.

[0198] The central processing unit 822 in the server 110 can be configured to execute the kiln electric cabinet health assessment method of the embodiment of the present application.

[0199] The embodiment of the present application also provides a computer readable storage medium for storing program codes, the program codes being used to execute the kiln electric cabinet health assessment method of each of the above embodiments.

[0200] The embodiment of the present application also provides a computer program product including a computer program. A processor of a computer device reads the computer program and executes it, so that the computer device executes the kiln electric cabinet health assessment method as described above.

[0201] In addition, the terms "comprise" and "include" and any variations thereof are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or apparatus that includes a list of steps or units is not necessarily limited to those clearly listed steps or units, but can include other steps or units that are not expressly listed or inherent to such process, method, product or apparatus.

[0202] It should be understood that, in the present application, "at least one" means one or more, and "multiple" means two or more. "And / or" is used to describe the relationship between associated objects, which means that there can be three relationships, for example, "A and / or B" can mean that there are three cases of A only, B only, and A and B at the same time, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects. "At least one of the following" or similar expressions means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b or c can mean a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0203] It should be understood that in the description of the embodiments of the present application, the meaning of multiple (or multiple items) is two or more, greater than, less than, more than, etc. are not included in the number, above, below, etc. are included in the number.

[0204] In several embodiments provided by the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and actual implementation can have another division manner, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed mutual ones can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0205] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed on multiple network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiments of the present application.

[0206] In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The above integrated unit can be realized in the form of hardware or in the form of software functional unit.

[0207] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or say the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0208] It should also be understood that the various embodiments provided by the embodiments of the present application can be combined in any manner to achieve different technical effects.

[0209] In the embodiments of the present application, the term "module" or "unit" refers to a computer program or a part of a computer program with a predetermined function, and works together with other related parts to achieve a predetermined target, and can be implemented entirely or partially by using software, hardware (such as a processing circuit or a memory) or a combination thereof. Similarly, one processor (or multiple processors or memories) can be used to implement one or more modules or units. In addition, each module or unit can be a part of an overall module or unit that includes the functions of the module or unit.

[0210] The above is a specific description of the embodiments of the present application, but the present application is not limited to the above-mentioned embodiments. Those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A method for health assessment of a kiln electrical cabinet, characterized in that: Applied to a kiln equipment system, the kiln equipment system includes multiple kiln electrical cabinets, and the kiln electrical cabinets include circuit breakers, contactors, and frequency converters. The method includes: Acquiring current operating parameters of the kiln electric cabinet, and determining a first health score value of the kiln electric cabinet based on the current operating parameters; Obtaining a first temperature rise parameter of the circuit breaker and a second temperature rise parameter of the frequency converter, and determining a second health score value of the kiln electric cabinet based on the first temperature rise parameter and the second temperature rise parameter; Obtaining a current harmonic distortion rate of the frequency converter, and determining a third health score value of the kiln electric cabinet based on the current harmonic distortion rate; determining a synergistic damage value of arc erosion and dust adsorption of the contactor, and determining a fourth health score value of the kiln electric cabinet based on the synergistic damage value; A weighted sum is performed on the first health score value, the second health score value, the third health score value, and the fourth health score value to obtain a comprehensive health score of the kiln electric cabinet.

2. The method for health assessment of a kiln electrical cabinet according to claim 1, characterized in that: Determining a first health score value of the kiln electric cabinet based on the current operating parameter includes: Determining the effective current value of the kiln electric cabinet based on the current operating parameters; The first health score value is obtained by dividing the effective value of the current of the kiln electric cabinet by the preset rated current value of the kiln electric cabinet.

3. The method for health assessment of a kiln electrical cabinet according to claim 1, characterized in that: The determining a second health score value of the kiln electric cabinet based on the first temperature rise parameter and the second temperature rise parameter includes: determining the effective current value, contact resistance, continuous operation time, heat dissipation coefficient, and heat dissipation area of ​​the circuit breaker based on the first temperature rise parameter; Dividing the product of the square of the effective value of the current of the circuit breaker, the contact resistance, and the continuous operation time by the product of the heat dissipation coefficient and the heat dissipation area to obtain a first temperature rise value corresponding to the circuit breaker; Determine, based on the second temperature rise parameter, a conduction loss value, a switching loss value, a junction-to-ambient thermal resistance of the inverter, and an ambient temperature of an environment in which the inverter is located; Obtaining a second temperature rise value corresponding to the inverter based on the conduction loss value, the switching loss value, the junction-to-ambient thermal resistance, and the ambient temperature of the environment in which the inverter is located; The first temperature rise value and the second temperature rise value are weightedly summed to obtain the second health score value.

4. The method for health assessment of a kiln electrical cabinet according to claim 1, characterized in that: Determining a third health score value of the kiln electric cabinet based on the current harmonic distortion rate includes: Determining the effective value of the fundamental current and the effective value of the hth harmonic current of the inverter; Determining the current harmonic distortion rate according to a preset harmonic order, the fundamental current effective value, and the hth harmonic current effective value; Using the current harmonic distortion rate as the third health score; Wherein, the preset harmonic order is N, and h is less than or equal to N.

5. The method for health assessment of a kiln electrical cabinet according to claim 1, characterized in that: The kiln electric cabinet further includes a laser dust sensor, and determining a fourth health score value of the kiln electric cabinet based on the coordinated damage value includes: Determining the current peak value of the contact of the contactor when it is in operation and the arc erosion coefficient of the contactor; Determining a first damage value of the contactor according to the arc erosion coefficient and the current peak value; Determining the dust concentration collected by the laser dust sensor, the internal temperature of the kiln electric cabinet, and the synergistic wear coefficient of dust and temperature; determining a second damage value according to the dust concentration, the internal temperature, and the cooperative wear coefficient; determining the coordinated damage value based on the first damage value and the second damage value; The synergistic damage value is used as the fourth health score value.

6. The method for health assessment of a kiln electrical cabinet according to claim 1, characterized in that: The method further comprises: For each of the kiln electric cabinets, determining an equipment failure type of the kiln electric cabinet, and determining a quantitative score of the kiln electric cabinet based on the equipment failure type; Determining an overall maintenance score factor based on the comprehensive health score and the quantitative score of each of the kiln electrical cabinets; For each of the kiln electric cabinets, dividing the quantitative score of the kiln electric cabinet by the product of the health score of the kiln electric cabinet and the overall maintenance score factor to obtain a maintenance priority score of the kiln electric cabinet; Determining a maintenance order for each of the kiln electrical cabinets based on the maintenance priority score; Maintain the kiln electrical cabinet according to the maintenance sequence.

7. The method for health assessment of a kiln electrical cabinet according to claim 1, characterized in that: The kiln electric cabinet further includes a PLC power supply, and the method further includes: Determining a preset life value of a capacitor of the PLC power supply at a preset rated temperature and a preset rated voltage; Determine the operating temperature and voltage of the PLC power supply; A life prediction value of the PLC power supply is determined according to the preset life value, the operating temperature value, and the operating voltage value.

8. A kiln electrical cabinet health assessment device, characterized in that: Applied to a kiln equipment system, the kiln equipment system includes multiple kiln electrical cabinets, the kiln electrical cabinets include circuit breakers, contactors and inverters, and the device includes: a first acquiring unit, configured to acquire a current operating parameter of the kiln electric cabinet, and determine a first health score value of the kiln electric cabinet based on the current operating parameter; a second acquiring unit, configured to acquire a first temperature rise parameter of the circuit breaker and a second temperature rise parameter of the frequency converter, and determine a second health score value of the kiln electric cabinet based on the first temperature rise parameter and the second temperature rise parameter; a third acquiring unit, configured to acquire a current harmonic distortion rate of the inverter, and determine a third health score value of the kiln electric cabinet based on the current harmonic distortion rate; a determining unit, configured to determine a synergistic damage value of arc erosion and dust adsorption of the contactor, and determine a fourth health score value of the kiln electric cabinet based on the synergistic damage value; A health assessment unit is configured to determine a comprehensive health score of the kiln electrical cabinet based on the first health score value, the second health score value, the third health score value, and the fourth health score value.

9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the kiln electric cabinet health assessment method according to any one of claims 1 to 7 is implemented.

10. A computer program product, comprising a computer program, characterized in that: The computer program is read and executed by a processor of an electronic device, so that the electronic device executes the kiln electric cabinet health assessment method according to any one of claims 1 to 7.

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