An adaptive temperature control method for an all-electric melting glass furnace

Abstract

This invention belongs to the field of automation control technology, specifically relating to an adaptive temperature control method for an all-electric glass furnace. The method includes: acquiring operating parameters of multiple heating sections; for any heating section: determining the electrothermal conduction fluctuation based on the current resistance difference and liquid level deviation rate; determining the heat load response sensitivity based on the ratio of the current output to the furnace's maximum output, the ratio of power to the transformer's rated power, and the charge conduction ratio; and correcting the base gain using the electrothermal conduction fluctuation and heat load response sensitivity to determine the adaptive power adjustment value, thereby controlling the transformer voltage regulation. This invention effectively suppresses temperature control lag and oscillation caused by thermal inertia through multi-dimensional physical parameter fusion and adaptive gain compensation.

Description

Technical Field

[0001] This invention relates to the field of automation control technology. More specifically, this invention relates to an adaptive control method for the temperature of an all-electric glass furnace. Background Technology

[0002] In the glass manufacturing industry, all-electric melting furnaces utilize the electrical conductivity of molten glass at high temperatures to directly convert electrical energy into heat energy through electrodes. This has significant advantages such as high thermal efficiency, precise temperature control, and low emissions. High borosilicate glass, due to its high melting temperature and extreme sensitivity to temperature fluctuations, requires a highly stable internal temperature field in the furnace to ensure the smooth progress of key process stages such as silicate formation, glass clarification, and homogenization. A stable temperature environment is not only the core guarantee for preventing phase separation and stratification of the molten glass, but also the basic condition for controlling the generation of physical defects such as bubbles, stones, and streaks.

[0003] Currently, temperature control in all-electric melting furnaces mainly relies on PID control algorithms or manual adjustment of transformer output power based on the output volume. In practice, thermal balance is usually achieved by adjusting the current and voltage of the main melting pool and each heating zone according to the preset process curve. This method performs well under ideal conditions where the production load is constant and the raw material composition is absolutely uniform. However, in actual production, the internal resistance of the glass melt will fluctuate nonlinearly with changes in temperature, liquid level, and batch composition.

[0004] However, in the actual production of high borosilicate glass, due to fluctuations in the feeding process and the strong coupling negative feedback effect between the internal resistance of the glass melt and temperature, traditional control methods often suffer from severe lag. When there are fluctuations in the uniformity of the batch or changes in the proportion of broken glass added, it will lead to uneven distribution of electrode current density, which in turn will cause local severe temperature fluctuations. The traditional fixed gain adjustment method cannot capture the disturbance of the thermal field distribution caused by the rheological properties of the glass melt in real time, so temperature adjustment often intervenes only after bubbles or stone defects are generated, which seriously affects the yield of high borosilicate glass and the safety of furnace operation. Summary of the Invention

[0005] To address the technical problems of temperature regulation lag and insufficient temperature control accuracy in fully electric melting furnaces under complex operating conditions due to resistance thermal feedback interference from molten glass, this invention provides an adaptive temperature control method for fully electric melting glass furnaces. The method includes: acquiring operating parameters of multiple heating sections of the fully electric melting glass furnace; the operating parameters include: standard values ​​of the liquid level in each heating section, real-time voltage, current, resistance, power, liquid level, and discharge rate, as well as the furnace's maximum output; for any heating section: based on the difference between the resistance at the current moment and the average resistance within a preset reference period, and the liquid level at the current moment relative to the standard liquid level of that heating section. The deviation rate is used to determine the current electrothermal conduction fluctuation; electrode parameters are extracted based on the process parameters of the kiln equipment to calculate the current charge conduction ratio; the current heat load response sensitivity is determined based on the ratio of the current output to the maximum output of the kiln, the ratio of power to the rated power of the transformer, and the charge conduction ratio; the basic proportional gain is corrected using the current electrothermal conduction fluctuation and heat load response sensitivity to determine the current adaptive power adjustment value; based on the magnitude and sign of the current adaptive power adjustment value, the transformer in this heating section is controlled to perform voltage regulation operation to complete the temperature control of the all-electric fused glass kiln.

[0006] This invention constructs a multi-dimensional adaptive control model by coupling the fluctuation of electrothermal conduction and the sensitivity of thermal load response. It changes the traditional lag mode of adjusting transformer taps based on manual experience. By monitoring the average resistance deviation and liquid level deviation rate in real time, it can accurately capture minute thermal field imbalances inside the kiln. The introduction of thermal load correction based on the ratio of material output to power allows the power adjustment value to dynamically offset thermal inertia according to the production load. This closed-loop regulation mechanism greatly improves the response speed and steady-state accuracy of temperature control, ensuring the long-term constancy of the kiln's thermal field.

[0007] Preferably, the plurality of heating sections include key heating sections such as the main melting zone of the kiln, the flow channel, the riser, and the material channel.

[0008] Preferably, the preset reference period refers to 10 minutes prior to the current time.

[0009] Preferably, the electrothermal conduction fluctuation at the current moment satisfies the expression: In the formula, , , , The first The current moment's fluctuations in electrothermal conduction, resistance, average resistance of all resistances within the preset reference period, and liquid level height of each heating section; For the first Standard values ​​for the liquid level height in each heating section; This is the liquid level correction factor; To take the absolute value; It is a natural exponential function.

[0010] This invention eliminates the interference of sensor zero-point drift or noise at a single moment on the control system by introducing the average resistance within a reference period as a benchmark. The algorithm can effectively identify the true trend of electrothermal conduction fluctuations, avoid erroneous adjustments caused by instantaneous fluctuations in the liquid level, and improve the reliability of data feedback.

[0011] Preferably, calculating the charge conduction ratio at the current moment includes: extracting electrode parameters: electrode spacing. Electrode surface area and reference conductivity at electrode standard temperature ;No. The charge conduction ratio of each heating section at the current moment ,in, , For the first The current and voltage of each heating section at the current moment.

[0012] Preferably, the heat load response sensitivity at the current moment satisfies the expression: In the formula, , , The first The heat load response sensitivity of each heating section at the current moment, the ratio of the output to the maximum output of the kiln, the ratio of the power to the rated power of the transformer, and the charge conduction ratio. For heat conversion efficiency; It is the natural logarithm function.

[0013] This invention parameterizes the key external disturbance term, the output rate, enabling the system to predict heat loss and adjust the power step size in advance when the kiln changes materials or switches production, thereby enhancing the system's anti-interference capability under complex and variable operating conditions.

[0014] Preferably, the adaptive power adjustment value at the current moment satisfies the expression: In the formula, , The first The adaptive power adjustment value, electrothermal conduction fluctuation, and heat load response sensitivity of each heating section at the current moment; , For the first The deviation between the current temperature and the target temperature of each heating section at the current moment, and the deviation at the second heating section at the third heating section. The deviation between the temperature at each moment and the target temperature; This is the sensitivity coefficient; Base proportional gain; The differential time constant; This is the index value at the current time. This is the index value for the given time.

[0015] This invention establishes an adaptive correction logic for the basic proportional gain, which increases the adjustment force when the fluctuation is severe and smooths the power output when it tends to stabilize, effectively solving the problem of temperature control overshoot and oscillation that is prone to occur in all-electric melting furnaces due to their large thermal inertia.

[0016] Preferably, the transformer controlling the heating section performs a voltage regulation operation, including: if the first The adaptive power adjustment value of each heating section at the current moment. The absolute value of the adjustment value is positive. When the power increment exceeds the upper limit of the current voltage level, the PLC controls the on-load tap-changing transformer to switch to the next higher voltage level; if negative and When the power reduction exceeds the upper limit that the current voltage level can cover when it is reduced to the next level, the PLC controls the on-load tap-changing electrode transformer to switch down a level.

[0017] Preferably, the upward or downward shift is calculated based on a preset voltage-power mapping table. The target voltage level corresponding to the absolute value of the adaptive power adjustment value of each heating section at the current moment is determined, thereby generating a jump-gear command to control the PLC to jump the gear.

[0018] This invention maps adjustment commands directly to transformer voltage taps to perform voltage regulation. This design shortens the control chain and significantly reduces the lifespan of transformers and electrodes caused by frequent fluctuations while improving the quality of molten glass forming.

[0019] Preferably, the method further includes: performing mean filtering on the real-time collected data.

[0020] The beneficial effects of this invention are as follows:

[0021] This invention breaks through the limitations of single temperature feedback and constructs a control system based on the fusion of multiple electrical physical fields of resistance, power, and heat load. It introduces an electrothermal conduction fluctuation index, couples the liquid level height with the internal resistance of the electrodes, solves the problem of hot spot effect inside the all-electric melting furnace, and dynamically weights the proportional gain by the heat load response sensitivity to achieve self-learning of the control step size. This not only improves the physical property stability of special glasses such as high borosilicate glass, but also achieves energy saving and consumption reduction and safe operation of the furnace throughout the entire process. Attached Figure Description

[0022] Figure 1This is a flowchart illustrating an adaptive temperature control method for an all-electric fused glass furnace according to the present invention.

[0023] Figure 2 This is a schematic diagram showing the temperature control comparison of an all-electric glass furnace. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0026] This invention discloses an adaptive temperature control method for an all-electric glass melting furnace, referring to... Figure 1 This includes steps S1 to S5:

[0027] S1. Obtain the operating parameters of multiple heating sections of the all-electric fused glass furnace.

[0028] It should be noted that the energy transfer of an all-electric melting furnace is highly dependent on the ohmic contact of the molten glass. Its operating state is determined by the coupling of multiple field parameters, including electrical, thermodynamic, and fluid dynamics. Therefore, it is necessary to construct a multi-dimensional sensing system that synchronously monitors the electrical feedback from the electric electrode and the mechanical feedback from the physical end. This fusion of multi-source data can provide objective physical support for subsequent in-depth analysis of the internal energy conversion efficiency of the molten glass and is the data foundation for shifting from hysteresis feedback to feedforward prediction.

[0029] Specifically, in key heating sections such as the main melting zone, flow channel, ascending channel, and material channel of the kiln, the voltage, current, power, and resistance of each heating section are collected in real time by the current transformer on the secondary side of the electrode transformer; simultaneously, the liquid level gauge collects the liquid level height once per second and obtains the standard liquid level height for each heating section; and the discharge port metering device obtains the real-time discharge rate and the maximum output of the kiln. In this embodiment of the invention, the acquisition frequency of both the current transformer and the discharge port metering device is set to 1Hz, i.e., once per second, which can be adjusted by the implementers as needed; at the same time, considering that there are a large number of mechanical and electrical equipment in the process area, which are prone to noise interference with data accuracy, the real-time acquired data is subjected to mean filtering to ensure that the acquired data is not affected by noise.

[0030] At this point, the electrical and operational characteristic data of each heating section have been obtained.

[0031] S2. For any heating section: Determine the electrothermal conduction fluctuation at the current moment based on the difference between the resistance at the current moment and the average resistance during its reference period, as well as the deviation rate of the liquid level at the current moment from the standard value of the liquid level in that heating section.

[0032] It should be noted that in the all-electric melting process, molten glass is both the heat source carrier and the heated body. In the melting zone of high borosilicate glass, if the temperature rises locally due to the reaction, it will cause a rapid decrease in resistivity, which will attract more current through the area, generating a hot spot effect and inducing thermal runaway. This instability of electrothermal conversion is often hidden in the fluctuating electrical signal. Traditional resistance monitoring is easily affected by the physical interference of liquid surface fluctuations. In order to eliminate the false influence of physical boundary changes on impedance feedback, this step introduces an exponential correction for liquid surface deviation to construct a dimensionless variation index. This index can filter out the noise of liquid surface jumping caused by the addition of material and accurately locate the electrothermal conduction abnormalities caused by changes in the composition of molten glass or distortion of the micro temperature gradient, thereby providing a basis for identifying the true stability of the heating environment.

[0033] Specifically, for any heating section, the resistance at all times within a preset reference period prior to the current time is extracted.

[0034] It should be added that, based on the thermal diffusion rate of high borosilicate glass melt at 1680℃ and the thermal field equilibrium time of the electrode area, 5 to 10 minutes is sufficient to cover short-term feeding pulse disturbances; in the embodiments of the present invention, the preset reference period is 10 minutes before the current time.

[0035] The electrothermal conduction fluctuation at the current moment is determined based on the difference between the resistance at the current moment and the average resistance within a preset reference period, and the deviation rate of the liquid level at the current moment from the standard value of the liquid level in the heating section; the electrothermal conduction fluctuation satisfies the expression:

[0036]

[0037] In the formula, For the first The fluctuation of electrothermal conduction in each heating section at the current moment; For the first The resistance of each heating section at the current moment; For the first The average value of all resistances in each heating section within the preset reference period at the current moment; For the first The liquid level in each heating section at the current moment; For the first Standard values ​​for the liquid level height in each heating section; This is the liquid level correction factor; To take the absolute value; It is a natural exponential function.

[0038] in, Reflects the first The degree of drastic change in the conductive medium properties between electrodes in each heating section at the current moment. The larger the value, the more it indicates that the ion mobility inside the glass melt in that heating section has changed unexpectedly at the current moment. This means that there may be unmelted batch material stones inside causing increased resistance, or local overheating causing decreased resistance. Moreover, since a large number of mechanical equipment are required to provide heat sources in the scenario, the monitored resistance value is greater than 0. As a compensation operator, if the liquid level in the heating section deviates from the standard height at the current moment, the change in the contact area between the electrode and the molten glass will produce spurious resistance fluctuations. This indicates that the change in the physical boundary at the current moment contributes more to the electrical signal. By exponentially amplifying the weights, the... Maintain high vigilance against such physical disturbances; if The larger the value, the more likely the current electrothermal conversion environment is to be in a non-steady state, indicating a greater fluctuation in electrothermal conduction at that moment.

[0039] It should be added that the parameters The weighting of the influence of liquid level deviation on impedance identification is used to adjust the value range of [0.5, 2]. In this invention, it is set to 1.2 to ensure that the algorithm can accurately filter out pseudo fluctuations in electrical signals when the liquid level fluctuates slightly due to feeding. The implementer can adjust it according to the arrangement of the kiln electrodes.

[0040] Thus, the electrothermal conduction fluctuations of each heating section at each moment were obtained.

[0041] S3. Extract electrode parameters based on the process parameters of the kiln equipment and calculate the charge conduction ratio at the current moment; determine the thermal load response sensitivity at the current moment based on the ratio of the current output to the maximum output of the kiln, the ratio of power to the rated power of the transformer, and the charge conduction ratio.

[0042] It should be noted that the dynamic equilibrium of a glass furnace is easily disrupted by the thermal throughput of material flow. A surge in output means that the downstream pulling speed increases, and the furnace must be simultaneously replenished with an equal amount of low-temperature batch material. The huge endothermic load generated by this cold material replenishment will rapidly consume the residual energy of the molten pool. Moreover, different sections have completely different tolerances to this load change due to differences in heat capacity, resulting in obvious response blind spots. Therefore, this step establishes an instantaneous dynamic ratio of flow demand to energy supply and combines it with edge effect analysis of electrode current density to evaluate the sensitivity of each heating section to thermal load response, providing data basis for subsequent feedforward compensation.

[0043] Specifically, electrode parameters are extracted from the process parameters of the kiln equipment, including: electrode spacing. Electrode surface area and reference conductivity at electrode standard temperature For any heating section, calculate the charge conduction ratio at the current moment. , ,in, , For the first The current and voltage of each heating section at the current moment. The total charge density flowing through the electrode spacing at the current moment; This reflects the ideal conductivity that can be provided based on standard conductivity and electrode surface area at the current moment.

[0044] It should be added that, according to Ohm's law, the dimension of electrical conductivity is ampere / (volt × meter). In the expression: the dimensions of both the numerator and denominator are amperes × meters, therefore Dimensionless.

[0045] The thermal load response sensitivity at the current moment is determined based on the ratio of the current output to the kiln's maximum output, the ratio of power to the transformer's rated power, and the charge conduction ratio; the thermal load response sensitivity satisfies the expression:

[0046]

[0047] In the formula, For the first The heat load response sensitivity of each heating section at the current moment; For the first The ratio of the current output of each heating section to the maximum output of the kiln; For the first The ratio of the power of each heating section at the current moment to the rated power of the transformer; For the first The charge conduction ratio of each heating section at the current moment; For heat conversion efficiency; It is the natural logarithm function.

[0048] in, A dynamic correlation was established between the demand growth and supply redundancy of the heating section at the current moment. When the ratio increases, it indicates that the heat loss caused by the discharge at the current moment is about to exceed the compensation boundary of the current power configuration, which means that there may be a risk of cooling in the current hot field, and it is necessary to enhance the sensitivity of the current heat load response. The charge conduction ratio reflects the current moment. The larger this value, the more the current flowing through the electrode per unit area at the current moment far exceeds the expected value of the standard conductivity, which means that the electrode is currently under overload. In the melting of high borosilicate glass, excessive current density will cause the power regulation to enter the nonlinear region. Small voltage fluctuations may trigger a severe hot spot effect. Therefore, the logarithmic function is used to map this characteristic of nonlinear increase in system thermal sensitivity as the current increases. That is, when the logarithmic term increases, it will further increase the thermal load response sensitivity of the heating section.

[0049] It should be added that the parameters It is used to correct the heat loss of equipment caused by refractory material erosion, kiln aging or environmental temperature difference. The empirical value range is [0.6, 0.9]. In this embodiment, it is taken as 0.82 to ensure the authenticity of the energy conservation assessment. The implementer can make dynamic fine adjustments according to the actual operating years of the kiln, the thickness of the insulation layer and the real-time heat dissipation monitoring requirements.

[0050] Thus, the heat load response sensitivity of each heating section at each time point was obtained.

[0051] S4. Use the current time-to-time electrothermal conduction fluctuation and thermal load response sensitivity to correct the basic proportional gain and determine the current time-to-time adaptive power adjustment value.

[0052] It should be noted that in the precision melting of high borosilicate glass, when there are severe conduction fluctuations in the electrothermal environment or the external load is in an extremely sensitive state, the PID parameters under steady state will lose their constraint, which can easily lead to the risk of crystallization caused by under-adjustment or over-adjustment. In order to achieve a dynamic response strategy, this step calculates a global gain correction factor by fusing the internal electrical fluctuations and external thermal shocks in Euclidean space. This factor can break the adjustment rigidity of the fixed PID. When the system senses the risk of environmental deterioration, it forcibly increases the adjustment weight of the proportional term, which can give the algorithm stronger regression momentum in the early stage before the temperature deviation expands, thus solving the problem of thermal feedback lag.

[0053] Specifically, for any heating section, the base proportional gain is corrected using the current fluctuation in electrothermal conduction and the sensitivity to heat load response, thus determining the adaptive power adjustment value for the current moment; the adaptive power adjustment value satisfies the expression:

[0054]

[0055] In the formula, For the first The adaptive power adjustment value of each heating section at the current moment; , For the first The fluctuation of electrothermal conduction and the sensitivity of thermal load response of each heating section at the current moment; For the first The deviation between the current temperature and the target temperature of each heating section; For the first The heating section is in the first The deviation between the temperature at each moment and the target temperature; This is the sensitivity coefficient; Base proportional gain; The integral time constant; The differential time constant; This is the index value at the current time. This is the index value for the given time.

[0056] in, The Euclidean space modulus is used to integrate the risks of both electrical characteristic fluctuations and physical heat load, characterizing the gain correction factor of the heating section at the current moment. A larger value indicates an anomaly in at least one dimension, or a superposition of slight perturbations in both dimensions, meaning the heating section is currently in a risky phase and requires a higher adjustment weight to ensure stability. This is to adjust the sensitivity of this risk perception and prevent over-adjustment from causing system oscillation; Some parts apply the risk correction factor directly to the proportional deviation term, making It becomes a dynamic gain. When environmental instability increases, the correction factor is greater than 1, and the adjustment weight of the proportional term is automatically increased. This means that under the same temperature deviation, the control system will output a larger power correction, thereby eliminating the risk. Partially, the control process ensures that it simultaneously handles the historical cumulative temperature difference of the heating section up to the current moment. The value reflects the strength of integral control in eliminating residual error. It is usually set between 600s and 3600s based on the huge thermal inertia of the kiln. In this embodiment, it is set to 2000s. Simultaneously capturing the instantaneous rate of change, it reacts in advance when the temperature has not yet substantially dropped but the trend slope is increasing, effectively suppressing instantaneous fluctuations caused by the hot spot effect of the fully fused electrode. The intensity of the adjustment, which reflects the predictive nature of temperature change trends, is typically set between tens and hundreds of seconds; in this embodiment of the invention, it is set to 50 seconds.

[0057] It should be added that the parameters This value is used to define the severity of the adaptive force. It is determined based on the slope of the internal resistance change curve of high borosilicate glass from the operating point of 1260℃ to the melting point of 1680℃, and the range is [0.3, 1.5]. In this invention, it is set to 0.85 to ensure that the system does not oscillate while suppressing fluctuations. The implementer can adjust it according to the adjustment accuracy of the transformer tap. Basic proportional gain The power adjustment corresponding to the unit temperature deviation reflects the thermal response intensity of the kiln. The value range is usually set to [30, 80] based on the rated power of the transformer and the thermal inertia of the kiln. The unit is kW / ℃. In this embodiment of the invention, it is taken as 50 to ensure that the system has sufficient power compensation capability in the high-temperature environment of 1680℃ high borosilicate glass. The implementer can adjust it according to the actual tonnage and output requirements of the kiln.

[0058] Thus, the adaptive power adjustment values ​​of each heating section at each time point are obtained.

[0059] S5. Based on the magnitude and sign of the adaptive power adjustment value at the current moment, control the transformer of the heating section to perform voltage regulation operation, and complete the temperature control of the all-electric melting glass furnace.

[0060] It should be noted that this step achieves adaptive temperature control by mapping adaptive power commands with real-time correction capabilities to the voltage taps of the electrode transformer, thereby extending the service life of the kiln refractory materials and improving the physicochemical homogeneity of the molten glass.

[0061] Specifically, the direction of voltage regulation is determined based on the sign of the adaptive power adjustment value:

[0062] If the first The adaptive power adjustment value of each heating section at the current moment. For positive and the first The absolute value of the adaptive power adjustment value of each heating section at the current moment. When the power increment exceeds the upper limit of the current voltage level, the control PLC causes the on-load tap-changing electrode transformer to switch to an upper level, achieving power compensation by increasing the output voltage reference, thereby increasing the temperature; if negative and When the power reduction exceeds the upper limit that the current voltage level can cover when it is reduced to the next level, the control PLC causes the on-load tap-changing electrode transformer to switch down a level to suppress the temperature rise trend.

[0063] The specific instructions for shifting up or down are calculated based on a preset voltage-power mapping table. The target voltage level is determined, and a jump instruction is generated to control the PLC to jump the voltage level.

[0064] By adjusting the output voltage reference as described above, precise power compensation for the thermal field of each heating section is achieved, effectively suppressing the hot spot effect and electrothermal runaway risk of high borosilicate glass melt in high-temperature environment, ensuring thermal field stability and improving yield.

[0065] For example, such as Figure 2 This is a comparison chart of temperature control in an all-electric fused glass furnace. The horizontal axis represents time, and the vertical axis represents temperature. The dashed line corresponds to the target temperature set by the process. The original temperature curve experienced a significant drop in the 1100s-1500s and 2500s-2800s ranges, indicating extreme conditions such as sudden changes in feed load or abnormal fluctuations in internal resistance within these ranges. Traditional PID control curves exhibit severe phase lag when faced with sudden changes in feed load or fluctuations in internal resistance. When the temperature deviates significantly from the set value, the PID response is sluggish, and severe overshoot and multiple oscillations occur during the correction process, indicating that the fixed gain cannot adapt to the non-steady-state characteristics. In contrast, the adaptive control curve of this invention, by fusing the sensitivity of thermal load response and the fluctuation of electrothermal conduction, forcibly increases the adjustment weight of the non-steady-state proportional term, thereby achieving rapid temperature control and forcibly locking the temperature fluctuation range within one degree below the target temperature. This verifies the high-precision tracking capability and robustness of this invention in handling high-borosilicate glass under high-temperature conditions.

Claims

1. An adaptive temperature control method for a fully electric melting glass furnace, characterized in that, include: The operating parameters of multiple heating sections of the all-electric melting glass furnace are obtained; the operating parameters include: the standard value of the liquid level in each heating section, the real-time voltage, current, resistance, power, liquid level and discharge rate, and the maximum output of the furnace; For any heating section: the electrothermal conduction fluctuation at the current moment is determined based on the difference between the resistance at the current moment and the average resistance within a preset reference period, and the deviation rate of the liquid level at the current moment from the standard value of the liquid level in that heating section. , ; , , The first The resistance of each heating section at the current moment, the average value of all resistances within the preset reference period, and the liquid level height; For the first Standard values ​​for liquid level in each heating section; This is the liquid level correction factor; To take the absolute value; It is a natural exponential function; Electrode parameters are extracted from the process parameters of the kiln equipment to calculate the charge conduction ratio at the current moment, including: Extracted electrode parameters: electrode spacing. Electrode surface area and reference conductivity at electrode standard temperature ;No. The charge conduction ratio of each heating section at the current moment ,in, , For the first The current and voltage of each heating section at the current moment; based on the ratio of the current output to the maximum kiln output, the ratio of power to the transformer's rated power, and the charge conduction ratio, the heat load response sensitivity at the current moment is determined. , In the formula, , The first The ratio of the current output of each heating section to the maximum output of the kiln, and the ratio of its power to the rated power of the transformer. For heat conversion efficiency; It is the natural logarithm function; By utilizing the current fluctuations in electrothermal conduction and the sensitivity to thermal load response, the base proportional gain is corrected to determine the current adaptive power adjustment value. , ; , For the first The deviation between the current temperature and the target temperature of each heating section at the current moment, and the deviation at the second heating section at the third heating section. The deviation between the temperature at each moment and the target temperature; This is the sensitivity coefficient; Base proportional gain; The integral time constant; The differential time constant; This is the index value at the current time. The index value is the time; based on the magnitude and sign of the adaptive power adjustment value at the current time, the transformer in this heating section is controlled to perform voltage regulation operation, thus completing the temperature control of the all-electric melting glass furnace.

2. The adaptive temperature control method for a fully electric fusion glass furnace according to claim 1, characterized in that, The multiple heating sections include: the main melting zone of the kiln, the flow channel, the riser, and the key heating sections of the material channel.

3. The adaptive temperature control method for a fully electric fusion glass furnace according to claim 1, characterized in that, The preset reference period refers to the 10 minutes preceding the current moment.

4. The adaptive temperature control method for a fully electric fusion glass furnace according to claim 1, characterized in that, The operation of the transformer controlling the heating section to perform voltage regulation includes: If the first The adaptive power adjustment value of each heating section at the current moment. The absolute value of the adjustment value is positive. When the power increment exceeds the upper limit of the current voltage level, the PLC controls the on-load tap-changing transformer to switch to the next higher voltage level; if negative and When the power reduction exceeds the upper limit that the current voltage level can cover when it is reduced to the next level, the PLC controls the on-load tap-changing electrode transformer to switch down a level.

5. The adaptive temperature control method for a fully electric fusion glass furnace according to claim 4, characterized in that, The upward or downward gear shift is calculated based on a preset voltage-power mapping table. The target voltage level corresponding to the absolute value of the adaptive power adjustment value of each heating section at the current moment is determined, thereby generating a jump-gear command to control the PLC to jump the gear.

6. The adaptive temperature control method for a fully electric fused glass furnace according to claim 1, characterized in that, The method further includes: performing mean filtering on the real-time collected data.

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