CN112749483B - Method and device for establishing discharge chamber model, electronic equipment and storage medium - Google Patents
Method and device for establishing discharge chamber model, electronic equipment and storage medium Download PDFInfo
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- CN112749483B CN112749483B CN202011584210.1A CN202011584210A CN112749483B CN 112749483 B CN112749483 B CN 112749483B CN 202011584210 A CN202011584210 A CN 202011584210A CN 112749483 B CN112749483 B CN 112749483B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/10—Preparation of ozone
- C01B13/11—Preparation of ozone by electric discharge
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2201/00—Preparation of ozone by electrical discharge
- C01B2201/90—Control of the process
Abstract
The invention provides a method, a device, electronic equipment and a storage medium for establishing a discharge chamber model. The method comprises the following steps: calculating an initial value of a parameter of the discharge chamber model; the calculating the initial values of the parameters of the discharge cell model includes: based on the actual and/or simulated cell voltages, currents and discharge sustain voltages, initial values of parameters of the cell model are calculated, wherein the parameters include air gap capacitance Cg and dielectric barrier capacitance Cd. The method can simplify the modeling complexity of the ozone generator and improve the safety of actual operation; the modeling accuracy of the ozone generator is improved, and the design of the controller is simplified and the reliability of the system is improved; the peripheral circuit of the ozone generator and the selection of related element parameters are conveniently designed, and the working efficiency is improved; the cost required for measuring and calculating the discharge chamber model is saved.
Description
Technical Field
The present invention relates to the field of ozone generation, and in particular, to a method and apparatus for creating a discharge chamber model, an electronic device, and a storage medium.
Background
Ozone is a strong oxidant which is easily decomposed into oxygen, does not produce secondary pollution, and is a pollution-free, pollution-free and residue-free oxidation and disinfectant. At present, ozone is widely applied to the fields of organic synthesis, inorganic chemical industry, metallurgy, papermaking, printing and dyeing, food preservation, medical appliances, tableware disinfection and the like, relates to various aspects of people's life, and is widely applied to tap water purification and treatment of industrial and domestic sewage and wastewater.
The Dielectric Barrier Discharge (DBD) method has the advantages of relatively low energy consumption, large ozone yield, wide gas source selection range and the like, and is widely applied to large-scale ozone production. While the key to DBD ozone generation is power control. The power supply of the DBD ozone generating device is a series resonance type variable frequency power supply, a series of conversion of AC-DC-AC of a power frequency power supply is mainly realized through analog and digital circuits, and resonance frequency voltage signals required by a DBD discharge chamber are generated, so that ozone is generated.
When ozone is prepared, the discharge chamber has two working stages of discharge and non-discharge, and meanwhile, the circuit has nonlinearity, so that the accurate establishment of a discharge chamber model cannot be realized through a traditional analysis method. However, in practical engineering, it is necessary to design and select relevant components, such as design and selection of transformer parameters, determination of controller frequency, selection of power level, etc., according to the cell model. Only if the discharge chamber model is accurate and reliable, the working efficiency of the ozone generator can be maximized, the long-term stable operation of the system is ensured, meanwhile, sufficient guarantee is provided for the design of the control system, the statistics of the control system is simplified, the cost is reduced, and meanwhile, the stability of the system is improved.
In summary, it is particularly necessary to provide a method that enables accurate model identification of the discharge chamber of an ozone generator.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a method, a device, electronic equipment and a storage medium for establishing a discharge chamber model, which are used for solving the defects that the measurement capacitance Cm is not easy to determine, the measurement capacitance Cm is unsafe and the obtained discharge model is inaccurate in the prior art, and realizing the effect of safely, reliably and accurately establishing the discharge chamber model.
Specifically, the embodiment of the invention provides the following technical scheme:
in a first aspect, an embodiment of the present invention provides a method for establishing a discharge chamber model, including:
based on the actual and/or simulated cell voltages, currents and discharge sustain voltages, initial values of parameters of the cell model are calculated, wherein the parameters include an air gap capacitance Cg and a dielectric barrier capacitance Cd.
Further, the calculating initial values of parameters of the discharge cell model based on the actual discharge cell and/or the simulated discharge cell voltage, current, and discharge sustain voltage includes:
the initial values of the parameters of the cell model are calculated based on the following formula,
C·ΔV＝i o ·Δt (1)
wherein C is the equivalent capacitance when the discharge chamber is discharged or not discharged, and DeltaV is the voltage and the discharge maintaining voltage U when the discharge chamber is discharged or not discharged z Absolute value of difference of i 0 For the current when the discharge cell is discharged or not, Δt is the time when the discharge cell is discharged or not in one discharge period,
when the voltage at two ends of the discharge chamber is larger than or equal to a preset threshold value, the air gap capacitance Cg is broken down to discharge, and at the moment, the equivalent capacitance of the discharge chamber is a dielectric barrier capacitance Cd, and the Cd meets the following conditions:
CdΔV＝i 1 ·Δt 1 (2)
when the voltage at two ends of the discharge chamber is smaller than a preset threshold value, the air gap capacitor Cg is not broken down, the air gap capacitor Cg is not discharged, and at the moment, the equivalent capacitance of the discharge chamber is a capacitance formed by the air gap capacitor Cg and the dielectric barrier capacitor Cd which are connected in series, and the Cg and Cd meet the following conditions:
wherein i is 1 For the current, Δt, during discharge of the discharge vessel 1 I is the discharge time in one discharge period of the discharge cell 2 At the current when the discharge chamber is not discharging 2 Is the non-discharge time within one discharge period of the discharge cell.
Further, the calculating initial values of parameters of the discharge cell model based on the actual and/or simulated discharge cell voltages, currents, and discharge sustain voltages further comprises:
an initial value of a parameter of the discharge cell model is calculated based on a sinusoidal plot of the voltage and current of the actual and/or simulated discharge cells over time.
Further, the calculating the initial value of the parameter of the discharge cell model based on the sinusoidal graph of the voltage and current of the actual discharge cell and/or the simulated discharge cell over time includes:
calculating the ratio of the area formed by the current and the discharge time when the discharge chamber discharges to the area formed by the current and the non-discharge time when the discharge chamber does not discharge in one discharge period of a sinusoidal graph of the voltage and the current of the discharge chamber changing along with time;
let i be 1 ·Δt 1 And i 2 ·Δt 2 The ratio of (2) is equal to the ratio of the above areas;
based on the above formulas (2) and (3) and the above assumption, the following formula (4) is obtained:
obtaining a multiple relation between Cd and Cg based on the formula (4);
and calculating the initial value of the parameter of the discharge chamber model by utilizing the multiple relation of Cd and Cg.
Further, the calculating the initial value of the parameter of the discharge chamber model using the multiple relation of Cd and Cg includes:
the initial values of Cd and Cg are calculated based on the above-described formulas (2) or (3) and the multiple relationship of Cd and Cg.
Further, the method further comprises:
setting the calculated initial value of the parameter of the discharge chamber model as the initial value of the parameter of the discharge chamber model;
initial values of parameters of the cell model are adjusted based on actual cell voltage and current data.
Further, the adjusting the initial value of the parameter of the discharge cell model based on the actual discharge cell current and voltage data includes:
comparing the actual cell with the voltage and current of the cell model;
when the difference value of the voltage and the current of the actual discharge chamber and the discharge chamber model is smaller than a preset threshold value, saving parameters Cd and Cg of the discharge chamber model at the moment;
and when the difference value is greater than or equal to a preset threshold value, adjusting parameters Cd and Cg of the discharge chamber model.
Further, the discharge chamber model is an ozone generator discharge chamber model.
In a second aspect, the present invention provides an apparatus for modeling a discharge chamber, comprising:
and an initial value unit for calculating initial values of parameters of the discharge cell model based on the actual discharge cell and/or the simulated discharge cell voltage, current and discharge sustain voltage, wherein the parameters include an air gap capacitance Cg and a dielectric barrier capacitance Cd.
In a third aspect, the invention provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, which when executed implements the steps of the method of creating a discharge chamber model as described above.
In a fourth aspect, the invention provides a non-transitory computer readable storage medium having stored thereon a computer program, characterized in that the computer program, when executed by a processor, implements the steps of the method of creating a discharge chamber model as described above.
According to the method, the device, the electronic equipment and the storage medium for establishing the discharge chamber model, the initial values of parameters of the discharge chamber model are calculated based on the sinusoidal curve graph of the voltage, the current, the voltage and the current of the actual discharge chamber and/or the simulated discharge chamber and the discharge maintenance voltage of the discharge chamber, wherein the parameters comprise an air gap capacitance Cg and a dielectric barrier capacitance Cd. The modeling complexity of the ozone generator is simplified by the method, and the safety of actual operation is improved; the modeling accuracy of the ozone generator is improved, and the design of the controller is simplified and the reliability of the system is improved; the peripheral circuit of the ozone generator and the selection of related element parameters are conveniently designed, so that the working efficiency is improved; the cost required for measuring and calculating the discharge chamber model is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the measurement principle of the current lissajous diagram;
FIG. 2 is a diagram showing the measurement results of the current Lissajous diagram;
FIG. 3 is a schematic diagram of a method for calculating initial values of model parameters in a method for creating a discharge chamber model according to an embodiment of the present invention;
FIG. 4 is a flow chart of a method for creating a discharge chamber model according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a discharge chamber model according to an embodiment of the present invention;
FIG. 6 is a sinusoidal graph of voltage and current plotted from actual or simulated discharge cell voltage and current data, in accordance with an embodiment of the present invention;
FIG. 7 is a schematic diagram of a discharge chamber model recognition device according to an embodiment of the invention; and
fig. 8 is a schematic structural diagram of an electronic device for discharge chamber model identification according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The Dielectric Barrier Discharge (DBD) method has the advantages of relatively low energy consumption, large ozone yield, wide gas source selection range and the like, and is widely applied to large-scale ozone production. While the key to DBD ozone generation is power control. The power supply of the DBD ozone generating device is a series resonance type variable frequency power supply, a series of conversion of AC-DC-AC of a power frequency power supply is mainly realized through analog and digital circuits, and resonance frequency voltage signals required by a DBD discharge chamber are generated, so that ozone is generated.
When ozone is prepared, the discharge chamber has two working stages of discharge and non-discharge, and meanwhile, the circuit has nonlinearity, so that the accurate establishment of a discharge chamber model cannot be realized through a traditional analysis method. However, in practical engineering, it is necessary to design and select relevant components, such as design and selection of transformer parameters, determination of controller frequency, selection of power level, etc., according to the cell model. Only if the discharge chamber model is accurate and reliable, the working efficiency of the ozone generator can be maximized, the long-term stable operation of the system is ensured, meanwhile, sufficient guarantee is provided for the design of the control system, the statistics of the control system is simplified, the cost is reduced, and meanwhile, the stability of the system is improved.
At present, the production design is mainly to calculate model parameters according to a Lissajous diagram, and two dynamic capacitances and breakdown voltages of a discharge chamber can be obtained through the Lissajous diagram method. The required transformer parameters, leakage inductance parameters, and thus the operating frequency of the controller, are then determined from these two capacitances and breakdown voltages, and the appropriate driving elements are selected. The measurement principle of the lissajous diagram is shown in figure 1.
The measurement principle of the lissajous diagram is shown in the following diagram, wherein Cm is a measurement capacitance, and Rm is a resistance voltage division. A closed parallelogram can be measured by an oscilloscope, and each parameter of the discharge model can be obtained by calculating the corresponding coordinate of the parallelogram. The measurement results of the oscilloscope are shown in fig. 2.
The corresponding equivalent capacitance can be calculated by the following formula:
wherein Cg is an air gap capacitance, cd is a dielectric barrier capacitance, ux is an intersection point of the line segment AB and the abscissa, and Uz is a discharge sustain voltage.
The influence of Cm on the measurement result can be ignored when Cm > Cd and Cg, namely the following formula is adopted:
the corresponding discharge chamber model can be calculated through the Lissajous diagram and the formula.
The following disadvantages exist with lissajous figures measuring and calculating the discharge model:
1. the selection of the measurement capacitance Cm is not easy to determine, meanwhile, parameters of the measurement capacitance of the discharge cells with different specifications are re-selected, and once the parameters are selected improperly, the capacitance is burnt out, and even safety accidents occur.
2. This undoubtedly increases the complexity of the wiring, as a result of the series connection of the measurement capacitor Cm in the main circuit, and also affects the reliability of the system.
3. Since the introduction of the measurement capacitance positively affects the measurement of the parameters of the discharge model, an accurate discharge model cannot be obtained.
Therefore, the improved method for establishing the discharge chamber model brings improvement of modeling accuracy and reliability for discharge chamber modeling, improves safety of actual operation and improves working efficiency; the beneficial effect of saving the cost required by measuring and calculating the discharge chamber model. To this end, the present invention provides a method, apparatus, electronic device and medium for creating a discharge chamber model, and the details of the present invention will be explained and illustrated below by specific examples.
FIG. 3 shows a schematic diagram of a method of calculating initial values of model parameters in a method of establishing a discharge chamber model; fig. 4 shows a flowchart of a method for creating a discharge chamber model according to an embodiment of the present invention. As shown in fig. 3 and 4, the method for establishing a discharge chamber model according to the embodiment of the present invention includes the following steps:
step 110: based on the actual and/or simulated cell voltages, currents and discharge sustain voltages, initial values of parameters of the cell model are calculated, wherein the parameters include air gap capacitance Cg and dielectric barrier capacitance Cd.
The initial values of the air gap capacitance Cg and the dielectric barrier capacitance Cd of the cell model are calculated by the voltage, current, and discharge sustain voltage of the cells.
The equivalent mode of the ozone generator is shown in fig. 5. Wherein Cd is a dielectric barrier capacitor, cg is an air gap capacitor, and Uz is a discharge sustain voltage. When the voltage of the load is lower than Uz, the discharge gap will not generate discharge phenomenon, the equivalent circuit is in the non-discharge stage, and when the voltage of the load is higher than Uz, the discharge phenomenon is generated, which is in the discharge stage.
Fig. 4 shows a flowchart of the whole method of creating a cell model, and the step of fig. 3 belongs to the step of setting initial parameters in fig. 4. As shown in fig. 4, the method for creating the electric room model includes: firstly, a simulation system of a discharge chamber is built in software, the simulation system is started, the initial value of the parameters of the model calculated in the step 110 is set as the initial parameters of the discharge chamber model, and the voltage parameters of the simulation system are modified based on the actual voltage conditions (the initial voltage and the phase of discharge) of the discharge chamber; and secondly, synchronously collecting the output voltage and the output current of the simulation system, comparing the output data of the actual discharge chamber with the output data of the simulation system, storing simulation parameters when the difference value of the output voltage and the output current meets the error requirement, adjusting the parameters of the discharge model when the difference value does not meet the error requirement, comparing the output data obtained by the discharge chamber model after the parameters are adjusted with the voltage and the current data of the actual discharge chamber, and obtaining the accurate discharge chamber model after the parameter adjustment for several times.
The starting voltage and phase of the actual discharge of the discharge vessel are calculated by the following steps: starting an ozone generating system, synchronously collecting the voltage and the current of a discharge chamber, storing the collected data, drawing a current and voltage curve, and calculating the initial voltage and the phase of discharge based on the current and voltage curve.
In the above-described embodiment, the initial values of the air gap capacitance Cg and the dielectric barrier capacitance Cd of the cell model are calculated by the voltage, current, and discharge sustain voltage of the cell, so that the accuracy of modeling the ozone generator cell is improved.
Based on the above embodiments, in the method for creating a discharge chamber model according to another embodiment of the present invention, calculating the initial values of the parameters of the discharge chamber model based on the actual discharge chamber and/or the simulated voltage, current, and discharge sustain voltage includes:
the initial values of the parameters of the cell model are calculated based on the following formula,
C·ΔV＝i o ·Δt (1)
wherein C is the equivalent capacitance when the discharge chamber is discharged or not, and DeltaV is the voltage and the discharge maintaining voltage U when the discharge chamber is discharged or not z Absolute value of difference of i 0 For the current when the discharge cell is discharged or not, Δt is the time when the discharge cell is discharged or not in one discharge period,
when the voltage at two ends of the discharge chamber is larger than or equal to a preset threshold value, the air gap capacitance Cg is broken down to discharge, and at the moment, the equivalent capacitance of the discharge chamber is a dielectric barrier capacitance Cd, and the Cd meets the following conditions:
C d ΔV＝i 1 ·Δt 1 (2)
when the voltage at two ends of the discharge chamber is smaller than a preset threshold value, the air gap capacitor Cg is not broken down, the air gap capacitor Cg is not discharged, and at the moment, the equivalent capacitance of the discharge chamber is a capacitance formed by the air gap capacitor Cg and the dielectric barrier capacitor Cd which are connected in series, and the Cg and Cd meet the following conditions:
wherein i is 1 Is the current at the discharge of the discharge chamber, deltat 1 I is the discharge time in one discharge period of the discharge cell 2 At the current when the discharge chamber is not discharging 2 Is the non-discharge time within one discharge period of the discharge cell.
In one example, the current i at the time of discharge will be measured through the discharge cell 1 ，Δt 1 And DeltaV is carried into the formula (2), cd can be obtained, and Cg can be obtained by carrying out the obtained Cd into the formula (3).
In another example, the left and right sides of the formula (2) or the formula (3) are divided, the ratio of the area formed by the current at the time of discharge and the time of discharge to the area formed by the current at the time of no discharge and the time of no discharge in one discharge cycle of the sinusoidal graph of the voltage and current change with time is used as the right side result of the new equation obtained by dividing the equation, so that the multiple relationship between Cd and Cg is obtained, the value of Cd is obtained by the formula (2), and the value of Cg is obtained by the multiple relationship between Cd and Cg.
Of course, those skilled in the art can know that the above formula (1), formula (2) and formula (3) can be flexibly applied to calculate the values of Cd and Cg, and the specific calculation method is not limited to the above examples.
In the above embodiment, the air gap capacitance Cg and the dielectric barrier capacitance Cd initial values of the discharge chamber model are calculated by the above formulas (1), (2) and (3), so that the calculated parameter initial values are more accurate, so that the accuracy of modeling with respect to the ozone generator discharge chamber model is improved.
Based on the above embodiments, in the method for creating a discharge chamber model according to another embodiment of the present invention, calculating the initial value of the parameter of the discharge chamber model based on the actual discharge chamber and/or the simulated voltage, current, and discharge sustain voltage further includes:
initial values of parameters of the cell model are calculated based on a sinusoidal plot of the voltage and current of the actual and/or simulated cells over time.
Fig. 6 shows a sinusoidal graph of the voltage and current of an actual discharge cell and/or a simulated discharge cell over time. One of them is a sinusoidal graph of voltage and the other is a sinusoidal graph of current, tp in the graph is the time (duration) during which the discharge cell is discharged, tn is the time (duration) during which the discharge cell is not discharged, x-axis is time, and y-axis is phase.
In the embodiment, the initial values of the air gap capacitance Cg and the dielectric barrier capacitance Cd of the discharge chamber model are calculated through the sinusoidal curve graph of the voltage change of the discharge chamber along with the time and the sinusoidal curve graph of the current change along with the time, so that the modeling complexity of the ozone generator is simplified, and the safety of actual operation is improved; the modeling accuracy of the ozone generator is improved.
Based on the above embodiments, in the method for creating a discharge chamber model according to another embodiment of the present invention, calculating the initial value of the parameter of the discharge chamber model based on the sinusoidal graph of the voltage and current of the actual discharge chamber and/or the simulated discharge chamber over time includes:
calculating the ratio of the area formed by the current and the discharge time when the discharge chamber discharges to the area formed by the current and the non-discharge time when the discharge chamber does not discharge in one discharge period of a sinusoidal graph of the voltage and the current of the discharge chamber changing along with time;
let i be 1 ·Δt 1 And i 2 ·Δt 2 The ratio of (2) is equal to the ratio of the above areas;
based on the above formulas (2) and (3) and the above assumption, the following formula (4) is obtained:
obtaining a multiple relation between Cd and Cg based on the formula (4);
and calculating the initial value of the parameter of the discharge chamber model by utilizing the multiple relation of Cd and Cg.
Specifically, equations of Cg and Cd will be obtained by dividing the left and right sides of equations (2) and (3) respectively, and making the divided results equal. Will i 1 ·Δt 1 And i 2 ·Δt 2 The divided ratio is used as a right divided result of the equation, so that the calculation process is complex, the error is large, and the process of calculating Cg and Cd is simpler by utilizing the area in the sinusoidal curve graph, because the area in the sinusoidal curve graph is relatively easy to obtain and very accurate. Specifically, assume i 1 ·Δt 1 And i 2 ·Δt 2 The ratio of (2) is the ratio of the area formed by the current and the discharge time at the time of discharge and the area formed by the current and the non-discharge time at the time of non-discharge in one discharge cycle of the sinusoidal graph of the voltage and the current of the discharge cell over time, that is, the ratio of the area formed by the current and the discharge time at the time of discharge and the area formed by the current and the non-discharge time is divided as the result of the right side of the two equations.
In the embodiment, the process of calculating the Cg and the Cd is simpler and more accurate by utilizing the ratio of the areas in the sinusoidal curve graph, the multiple relation of the Cd and the Cg is calculated by utilizing the sinusoidal curve graph of the voltage and the current, and the specific numerical values of the Cd and the Cg are calculated by utilizing the multiple relation of the Cd and the Cg.
Based on the above embodiments, in the method for creating a discharge chamber model according to another embodiment of the present invention, the calculating the initial value of the parameter of the discharge chamber model using the multiple relationship between Cd and Cg includes:
the initial values of Cd and Cg are calculated based on the above-described formulas (2) or (3) and the multiple relationship of Cd and Cg.
In one example, assuming Cg is x times Cd, a multiple relationship of Cd and Cg is obtained based on equation (4) above. In another example, the fold relationship of Cg as Cd is obtained by eliminating the common Cd and Δv on both the left and right sides of equation (4).
In the embodiment, the initial values of Cd and Cg are calculated through the multiple relation of the formula (2) or (3) and Cd and Cg, so that the calculated initial values of Cd and Cg are more accurate, the modeling complexity of the ozone generator is simplified, and the working efficiency is improved.
Based on the foregoing embodiment, in a method for creating a discharge chamber model according to another embodiment of the present invention, the method further includes:
setting the calculated initial value of the parameter of the discharge chamber model as the initial value of the parameter of the discharge chamber model;
initial values of parameters of the cell model are adjusted based on actual cell voltage and current data.
The parameters Cd and Cg are automatically adjusted by comparing the actual cell voltage and current data with the voltage and current output by the cell model created by the present invention. Specifically, when the difference between the voltage and the current output by the discharge chamber model and the actual voltage and the current data of the discharge chamber is smaller than a predetermined threshold, the simulation parameters Cd and Cg are saved, and when the difference between the voltage and the current output by the discharge chamber model and the actual voltage and the current data of the discharge chamber is larger than or equal to the predetermined threshold, the parameters Cd and Cg of the discharge chamber model are adjusted, and through the adjustment, the internal parameters Cd and Cg of the discharge chamber model are more in line with the internal parameters Cd and Cg of the actual discharge chamber.
In the above embodiment, the output voltage and the output current of the simulation system are collected, and the optimization of the parameters Cd and Cg can be achieved by collecting and comparing the output voltage and the output current of the simulation system, which is safer than the lissajous diagram mode.
Based on the foregoing embodiments, in the method for creating a discharge chamber model according to another embodiment of the present invention, the adjusting the initial value of the parameter of the discharge chamber model based on the actual current and voltage data of the discharge chamber includes:
comparing the actual voltage and current of the discharge chamber with the actual voltage and current of the discharge chamber model;
wherein parameters Cd and Cg of the cell model at that time are saved when the difference between the actual voltage and current of the cell and the cell model is smaller than a predetermined threshold, and when the difference is greater than or equal to the predetermined threshold, the parameters Cd and Cg of the cell model are adjusted.
In one example, the voltage at the time of discharge of the actual discharge cell is compared with the voltage at the time of discharge of the discharge cell model, and the current at the time of discharge of the actual discharge cell is compared with the current at the time of discharge of the discharge cell model. In one example, the voltage of the actual discharge cell at the time of non-discharge is compared with the voltage of the discharge cell model at the time of non-discharge, and the current of the actual discharge cell at the time of non-discharge is compared with the current of the discharge cell model at the time of non-discharge.
In the above embodiment, the optimization of the parameters Cd and Cg can be achieved by comparing the values of the voltages and currents, and the calculation and optimization of the parameters Cd and Cg according to the present invention is safer than those according to lissajous diagram.
Based on the above embodiment, in the method for creating a discharge chamber model according to another embodiment of the present invention, the discharge chamber model is an ozone generator discharge chamber model.
In one example, the chamber model of the present invention is a chamber model of an ozone generator, although the chamber model of the present invention can be a chamber model on other devices or equipment that require discharging.
In the embodiment, modeling and optimization are performed through the ozone generator discharge chamber model, so that the peripheral circuit of the ozone generator and the selection of related element parameters can be conveniently designed.
The key points of the invention are as follows:
1. the method for identifying the system is applied to the establishment of the discharge model.
2. The accurate establishment of the discharge model is realized through continuous iteration of real experimental data.
3. Parameters of the discharge chamber are dynamically modified in a circuit simulation mode, so that a discharge chamber model is built quickly, safely and conveniently.
According to the method, the device, the electronic equipment and the storage medium for establishing the discharge chamber model, initial values of parameters of the discharge chamber model are calculated based on a sinusoidal curve graph of the change of the voltage and the current of an actual discharge chamber and/or a simulated discharge chamber along with time and the discharge maintenance voltage of the discharge chamber, wherein the parameters comprise an air gap capacitance Cg and a dielectric barrier capacitance Cd. The modeling complexity of the ozone generator is simplified by the method, and the safety of actual operation is improved; the modeling accuracy of the ozone generator is improved, and the design of the controller is simplified and the reliability of the system is improved; the peripheral circuit of the ozone generator and the selection of related element parameters are conveniently designed, so that the working efficiency is improved; the cost required for measuring and calculating the discharge chamber model is saved.
The discharge chamber model identification device provided by the invention is described below, and the discharge chamber model identification device described below and the method for establishing a discharge chamber model described above can be referred to correspondingly.
Fig. 7 illustrates a physical structure diagram of an apparatus for creating a discharge chamber model, and as shown in fig. 7, the apparatus may include:
an initial value calculation unit 710 for calculating initial values of parameters of the cell model based on the actual cell and/or the simulated cell voltage, current and discharge sustain voltage, wherein the parameters include an air gap capacitance Cg and a dielectric barrier capacitance Cd.
Fig. 8 illustrates a physical structure diagram of an electronic device, as shown in fig. 8, which may include: processor 810, communication interface (Communications Interface) 820, memory 830, and communication bus 840, wherein processor 810, communication interface 820, memory 830 accomplish communication with each other through communication bus 840. The processor 810 may invoke logic instructions in the memory 830 to perform a method of building a cell model, the method comprising:
based on the actual and/or simulated cell voltages, currents and discharge sustain voltages, initial values of parameters of the cell model are calculated, wherein the parameters include air gap capacitance Cg and dielectric barrier capacitance Cd.
It will be appreciated that the refinement and expansion functions that the computer program may perform are as described with reference to the above embodiments.
Based on the same inventive concept, a further embodiment of the present invention provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements all the steps of the above-described method of creating a discharge chamber model.
It will be appreciated that the refinement and expansion functions that the computer program may perform are as described with reference to the above embodiments.
Based on the same inventive concept, a further embodiment of the invention provides a computer program product comprising a computer program which, when executed by a processor, implements all the steps of the above-described method of creating a discharge chamber model.
It will be appreciated that the refinement and expansion functions that the computer program may perform are as described with reference to the above embodiments.
Further, the logic instructions in the memory described above may be implemented in the form of software functional units and stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment of the invention. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the above technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform the security defense method described in the respective embodiments or some parts of the embodiments.
Moreover, in the present invention, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Furthermore, in the present disclosure, descriptions of the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A method of modeling a discharge chamber, comprising:
calculating initial values of parameters of the cell model based on the actual cell and/or the simulated cell voltage, current and discharge sustain voltage, wherein the parameters include an air gap capacitance Cg and a dielectric barrier capacitance Cd,
wherein calculating initial values of parameters of the discharge cell model based on the actual and/or simulated discharge cell voltages, currents, and discharge sustain voltages comprises:
the initial values of the parameters of the cell model are calculated based on the following formula,
C·ΔV＝i o ·Δt (I)
wherein C is the equivalent capacitance when the discharge chamber is discharged or not discharged, and DeltaV is the voltage and the discharge maintaining voltage U when the discharge chamber is discharged or not discharged z Absolute value of difference of i 0 For the current when the discharge cell is discharged or not, Δt is the time when the discharge cell is discharged or not in one discharge period,
when the voltage at two ends of the discharge chamber is larger than or equal to a preset threshold value, the air gap capacitance Cg is broken down to discharge, and at the moment, the equivalent capacitance of the discharge chamber is a dielectric barrier capacitance Cd, and the Cd meets the following conditions:
C d ΔV＝i 1 ·Δt 1 (2)
when the voltage at two ends of the discharge chamber is smaller than a preset threshold value, the air gap capacitor Cg is not broken down, the air gap capacitor Cg is not discharged, and at the moment, the equivalent capacitance of the discharge chamber is a capacitance formed by the air gap capacitor Cg and the dielectric barrier capacitor Cd which are connected in series, and the Cg and Cd meet the following conditions:
wherein i is 1 For the current, Δt, during discharge of the discharge vessel 1 I is the discharge time in one discharge period of the discharge cell 2 At the current when the discharge chamber is not discharging 2 For the non-discharge time within one discharge period of the discharge cells,
wherein calculating initial values of parameters of the discharge cell model based on the actual and/or simulated discharge cell voltages, currents, and discharge sustain voltages further comprises:
calculating initial values of parameters of the discharge cell model based on sinusoidal graphs of voltage and current of actual and/or simulated discharge cells over time,
wherein calculating initial values of parameters of the discharge cell model based on the sinusoidal graph of the voltage and current of the actual and/or simulated discharge cells over time comprises:
calculating the ratio of the area formed by the current and the discharge time when the discharge chamber discharges to the area formed by the current and the non-discharge time when the discharge chamber does not discharge in one discharge period of a sinusoidal graph of the voltage and the current of the discharge chamber changing along with time;
let i be 1 ·Δt 1 And i 2 ·Δt 2 The ratio of (2) is equal to the ratio of the above areas;
based on the above formulas (2) and (3) and the above assumption, the following formula (4) is obtained:
obtaining a multiple relation between Cd and Cg based on the formula (4);
and calculating the initial value of the parameter of the discharge chamber model by utilizing the multiple relation of Cd and Cg.
2. The method of claim 1, wherein calculating initial values of parameters of the cell model using a multiple relationship of Cd and Cg comprises:
the initial values of Cd and Cg are calculated based on the above-described formulas (2) or (3) and the multiple relationship of Cd and Cg.
3. The method of modeling a discharge chamber of claim 1, further comprising:
setting the calculated initial value of the parameter of the discharge chamber model as the initial value of the parameter of the discharge chamber model;
initial values of parameters of the cell model are adjusted based on actual cell voltage and current data.
4. A method of modeling a discharge chamber as claimed in claim 3 wherein said adjusting initial values of parameters of said discharge chamber model based on actual discharge chamber current and voltage data comprises:
comparing the actual cell with the voltage and current of the cell model;
when the difference value of the voltage and the current of the actual discharge chamber and the discharge chamber model is smaller than a preset threshold value, saving parameters Cd and Cg of the discharge chamber model at the moment;
and when the difference value is greater than or equal to a preset threshold value, adjusting parameters Cd and Cg of the discharge chamber model.
5. The method of creating a chamber model as claimed in any one of claims 1-4, wherein the chamber model is an ozone generator chamber model.
6. An apparatus for modeling a discharge chamber, comprising:
an initial value unit for calculating parameters, including an air gap capacitance Cg and a dielectric barrier capacitance Cd,
wherein calculating initial values of parameters of the discharge cell model based on the actual and/or simulated discharge cell voltages, currents, and discharge sustain voltages comprises:
the initial values of the parameters of the cell model are calculated based on the following formula,
C·ΔV＝i o ·Δt (I)
wherein C is the equivalent capacitance when the discharge chamber is discharged or not discharged, and DeltaV is the voltage and the discharge maintaining voltage U when the discharge chamber is discharged or not discharged z Absolute value of difference of i 0 For the current when the discharge cell is discharged or not, Δt is the time when the discharge cell is discharged or not in one discharge period,
when the voltage at two ends of the discharge chamber is larger than or equal to a preset threshold value, the air gap capacitance Cg is broken down to discharge, and at the moment, the equivalent capacitance of the discharge chamber is a dielectric barrier capacitance Cd, and the Cd meets the following conditions:
C d ΔV＝i 1 ·Δt 1 (2)
when the voltage at two ends of the discharge chamber is smaller than a preset threshold value, the air gap capacitor Cg is not broken down, the air gap capacitor Cg is not discharged, and at the moment, the equivalent capacitance of the discharge chamber is a capacitance formed by the air gap capacitor Cg and the dielectric barrier capacitor Cd which are connected in series, and the Cg and Cd meet the following conditions:
wherein i is 1 For the current, Δt, during discharge of the discharge vessel 1 I is the discharge time in one discharge period of the discharge cell 2 At the current when the discharge chamber is not discharging 2 For the non-discharge time within one discharge period of the discharge cells,
wherein calculating initial values of parameters of the discharge cell model based on the actual and/or simulated discharge cell voltages, currents, and discharge sustain voltages further comprises:
calculating initial values of parameters of the discharge cell model based on sinusoidal graphs of voltage and current of actual and/or simulated discharge cells over time,
wherein calculating initial values of parameters of the discharge cell model based on the sinusoidal graph of the voltage and current of the actual and/or simulated discharge cells over time comprises:
calculating the ratio of the area formed by the current and the discharge time when the discharge chamber discharges to the area formed by the current and the non-discharge time when the discharge chamber does not discharge in one discharge period of a sinusoidal graph of the voltage and the current of the discharge chamber changing along with time;
let i be 1 ·Δt 1 And i 2 ·Δt 2 The ratio of (2) is equal to the ratio of the above areas;
based on the above formulas (2) and (3) and the above assumption, the following formula (4) is obtained:
obtaining a multiple relation between Cd and Cg based on the formula (4);
and calculating the initial value of the parameter of the discharge chamber model by utilizing the multiple relation of Cd and Cg.
7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method of creating a discharge chamber model according to any one of claims 1-5 when the program is executed.
8. A non-transitory computer readable storage medium, having stored thereon a computer program, which when executed by a processor, implements the steps of the method of creating a discharge chamber model according to any of claims 1-5.
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