Membrane type high-pressure heater power response control method and system

Abstract

The invention relates to a power response control method for a membrane type high-voltage heater. The method comprises the following steps: acquiring a first working current and a second working voltage after the membrane type high-voltage heater is started; calculating the current maximum working power based on the first working current and the first working voltage; obtaining a target working power, and determining an initial duty ratio based on the current maximum working power and the target working power; executing the initial duty ratio, obtaining a second working current and a second working voltage for the operation of the membrane type high-voltage heater, and calculating the actual working power; and calculating a power deviation based on the actual working power and the target working power, and when the power deviation exceeds a preset deviation threshold value, carrying out duty ratio amplitude limiting adjustment so as to stabilize the actual working power in an error range allowed by the target working power.

Description

Technical Field

[0001] The present application relates to the technical field of power response control, and particularly relates to a power response control method, system, device and storage medium for a membrane type high-pressure heater. Background Art

[0002] With the vigorous development of new energy vehicles, higher requirements are put forward for endurance, and higher requirements are also put forward for lightweight. For the sake of weight reduction and cost, heaters gradually adopt the membrane heating method. The resistance value of the membrane type heater will have a small fluctuation with the change of power, and this fluctuation causes the heating power to change. Under the condition of a large voltage, the power fluctuation is large.

[0003] Currently, in the related art, it is confirmed whether to adjust by collecting the difference between the working power and the ideal power, and the power correction coefficient is adjusted when the power exceeds the threshold. However, there is a chance of overshoot using this adjustment method, which causes power response fluctuations.

[0004] Therefore, it is necessary to propose a power response control method, system, device and storage medium for a membrane type high-pressure heater to improve the above problems. Summary of the Invention

[0005] The present application provides a power response control method, system and storage medium for a membrane type high-pressure heater to solve the problems of slow power control response speed and insufficient control accuracy existing in the prior art.

[0006] In a first aspect, the present application provides a power response control method for a membrane type high-pressure heater, and the method includes:

[0007] Obtain a first working current and a second working voltage after the membrane type high-pressure heater is started; wherein, the membrane type high-pressure heater operates at a preset low duty cycle;

[0008] Calculate the current maximum working power based on the first working current and the first working voltage;

[0009] Obtain a target working power, and determine an initial duty cycle based on the current maximum working power and the target working power;

[0010] Execute the initial duty cycle, obtain a second working current and a second working voltage of the membrane type high-pressure heater during operation, and calculate the actual working power;

[0011] Calculate a power deviation based on the actual working power and the target working power, and when the power deviation exceeds a preset deviation threshold, perform duty cycle limiting adjustment to stabilize the actual working power within the error range allowed by the target working power.

[0012] Second aspect, the present application provides a power response control system for a membrane type high-pressure heater, and the system includes:

[0013] A first acquisition module, configured to acquire a first operating current and a second operating voltage after the membrane type high-pressure heater is started; wherein, the membrane type high-pressure heater operates at a preset low duty cycle;

[0014] A first power calculation module, configured to calculate a current maximum operating power based on the first operating current and the first operating voltage;

[0015] A second acquisition module, configured to acquire a target operating power, and determine an initial duty cycle based on the current maximum operating power and the target operating power;

[0016] A second power calculation module, configured to execute the initial duty cycle, acquire a second operating current and a second operating voltage of the membrane type high-pressure heater during operation, and calculate an actual operating power;

[0017] An adjustment module, configured to calculate a power deviation based on the actual operating power and the target operating power, and perform duty cycle limiting adjustment when the power deviation exceeds a preset deviation threshold, so as to stabilize the actual operating power within an error range allowed by the target operating power.

[0018] Third aspect, there is provided an electronic device, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory complete communication with each other through the communication bus;

[0019] The memory is used for storing a computer program;

[0020] The processor, when executing the program stored on the memory, implements the steps of the power response control method for the membrane type high-pressure heater according to any one of the embodiments of the first aspect.

[0021] Fourth aspect, there is provided a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the power response control method for the membrane type high-pressure heater according to any one of the embodiments of the first aspect are implemented.

[0022] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the prior art: 1. Using the ratio of the required power to the maximum working capacity under the current conditions as the duty cycle under the current working conditions, adaptively controlling the power response to avoid the problem of poor control accuracy consistency caused by poor product consistency; 2. Fast power response, small fluctuation, adaptive control, reducing the calibration process; 3. Improving the accuracy of the control system, by accurately calculating the resistance change rate and adjusting the proportional coefficient and integral coefficient according to this change rate, the control system can perform more precisely under different voltage change conditions. Especially in applications such as membrane high-pressure heaters, this precise parameter adjustment helps to improve the stability and response speed of the heating system; 4. By measuring and calculating the resistance change rate in real time and relying on the preset coefficient range and rules, the proportional coefficient and integral coefficient most suitable for the current working state can be automatically selected, reducing the need for manual intervention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present invention and used together with the specification to explain the principles of the present invention.

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic flow chart of a method for controlling the power response of a membrane high-pressure heater provided by an embodiment of the present application;

[0026] Figure 2 It is a schematic flow chart of a duty cycle limiting adjustment method provided by an embodiment of the present application;

[0027] Figure 3 It is a schematic structural diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0029] The embodiment of the present application provides a method for controlling the power response of a membrane type high-pressure heater, including high-voltage positive IGBT drive, high-voltage negative IGBT drive, high-voltage acquisition, and heating film current acquisition. When the heater switches from the non-working state to the working state and operates at a small duty cycle (such as 2%), the working voltage and current are collected, and the maximum working power of the heater under the current voltage condition can be calculated. The ratio of the required power to the maximum working power is the initial control duty cycle. Adjust the control duty cycle to the initial control duty cycle, obtain the working voltage and current according to the new control command, calculate the updated actual power, compare it with the target power, and use the ratio of the difference between the actual power and the target power to the current maximum working capacity as the input for PI control adjustment to obtain the duty cycle pre-adjustment amount. When the required power remains unchanged, the calculated pre-adjustment amount cannot exceed ±1%. The actual duty cycle plus the pre-adjustment amount obtained through the amplitude limiting operation is used as the latest control duty cycle command. When the required power changes, the ratio of the updated required power to the maximum working capacity is used as the latest duty cycle command. Continue to repeat the above steps to iteratively control the heater to respond to the power control command. This control method has a fast control response and a small overshoot, resulting in small power response fluctuations.

[0030] The following elaborates in detail on the method for controlling the power response of the membrane type high-pressure heater provided by the embodiment of the present application with reference to the accompanying drawings.

[0031] Figure 1 It is a schematic flow chart of a method for controlling the power response of a membrane type high-pressure heater provided by the embodiment of the present application. In some embodiments, Figure 1 The shown flow can be executed by an electronic device. Exemplarily, this flow may include the following operations.

[0032] Step 101, obtain the first working current and the second working voltage after the membrane type high-pressure heater is started.

[0033] Among them, the membrane type high-pressure heater operates at a preset low duty cycle. A membrane type high-pressure heater is a device that uses membrane technology for heating, usually used to provide heating under high voltage in a power system (for example, the power system of a new energy vehicle), and it heats the medium by generating heat through the current passing through the resistor.

[0034] The first working current refers to the current value when the membrane type high-pressure heater operates at a preset low duty cycle after it is started.

[0035] The second working voltage refers to the voltage value when the membrane type high-pressure heater operates at a preset low duty cycle after it is started.

[0036] After the heater is started, monitor the current and voltage and record their current and voltage values. These data can be obtained using a current-voltage meter or through the monitoring equipment of the heater control system.

[0037] Step 102: Calculate the current maximum operating power based on the first operating current and the first operating voltage.

[0038] The operating power refers to the power actually consumed when the heater is operating, which can be calculated from the current and voltage. The current maximum operating power refers to the maximum power output that the device can achieve under the given current and voltage.

[0039] In some embodiments, the current maximum operating power can be calculated by substituting the voltage and current values into the power calculation formula.

[0040] Step 103: Obtain the target operating power, and determine the initial duty cycle based on the current maximum operating power and the target operating power.

[0041] The target operating power is an ideal power value set according to actual needs. For example, it can be set according to the operating requirements of the heater or the requirements of the production process. For example, the target power may be set to 2500W.

[0042] The duty cycle refers to the ratio of the time when the heater is turned on to the total cycle time in periodic operation, usually expressed as a percentage. For example, a duty cycle of 50% means that in the entire cycle, the system is turned on for half of the time and turned off for the other half of the time.

[0043] In some embodiments, the proportional relationship between the target power and the current maximum power can be determined to calculate the initial duty cycle.

[0044] Step 104: Execute the initial duty cycle, obtain the second operating current and the second operating voltage of the shell-and-tube high-pressure heater during operation, and calculate the actual operating power.

[0045] The second operating current and the second operating voltage are the current and voltage values when the heater is operating after the initial duty cycle is executed.

[0046] The actual operating power is the actual power calculated based on the second operating current and voltage.

[0047] In some embodiments, after adjusting the initial duty cycle according to the control system, the current and voltage of the heater can be monitored in real time, and the actual power can be calculated. For example, if the second operating current is 11A and the second operating voltage is 230V, the actual power is 2530W.

[0048] Step 105: Calculate the power deviation based on the actual operating power and the target operating power, and when the power deviation exceeds the preset deviation threshold, perform duty cycle limiting adjustment to stabilize the actual operating power within the error range allowed by the target operating power.

[0049] Power deviation is the difference between the target operating power and the actual operating power. For example, if the target power is 2500W and the actual power is 2530W, the power deviation is 30W.

[0050] The preset deviation threshold is a set allowable error range. When the power deviation exceeds this threshold, it indicates that adjustment is required.

[0051] Duty cycle limiting adjustment refers to adjusting the duty cycle to limit it from exceeding a certain range, thereby stabilizing the power output.

[0052] In some embodiments, the power deviation can be calculated and compared with the preset deviation threshold. When the deviation exceeds the threshold, the power is controlled by adjusting the duty cycle. For example, if the preset deviation threshold is 50W and the actual power deviation is 30W, no adjustment is made; if the deviation exceeds 50W, the duty cycle needs to be adjusted to reduce the power deviation.

[0053] The error range refers to the allowable power deviation range, which can be set according to the tolerance of the system. For example, the target power is 2500W and the error range is ±50W.

[0054] In some embodiments, the control system can dynamically adjust the duty cycle according to the power deviation to ensure that the actual power is within the error range of the target power. For example, by increasing or decreasing the duty cycle, the actual power is always maintained between 2450W and 2550W.

[0055] Figure 2 It is a schematic flowchart of the duty cycle limiting adjustment method provided by the embodiments of this application. In some embodiments, Figure 2 The shown process can be executed by an electronic device. Exemplarily, this process can include the following operations.

[0056] Step 201, calculate a duty cycle adjustment factor based on the power deviation and the current actual power capacity of the membrane type high-pressure heater.

[0057] The current actual power capacity refers to the maximum power that the membrane type high-pressure heater can provide under the current operating state.

[0058] The duty cycle adjustment factor is an adjustment factor calculated through the power deviation and the actual power capacity, and is used to control the adjustment of the duty cycle. It is directly proportional to the magnitude of the power deviation.

[0059] In some embodiments, the adjustment factor can be determined through a certain calculation method according to the power deviation and the current actual power capacity. For example, the calculation of the adjustment factor can be set through a proportional relationship or according to an empirical formula.

[0060] In some embodiments, the electronic device can determine the current actual power capacity of the film type high-pressure heater through the following steps.

[0061] S10, collect the third working voltage and the third working current of the film type high-pressure heater according to a preset time period.

[0062] The preset time period refers to a set fixed time interval for data collection and processing. Within this time period, the system will collect data regularly for analysis. For example, the preset time period can be 10 milliseconds, 20 milliseconds, 50 milliseconds, 100 milliseconds, 200 milliseconds, 500 milliseconds, 1000 milliseconds, or 1500 milliseconds, etc., indicating that the system collects data every such time.

[0063] The third working voltage refers to the voltage value of the film type high-pressure heater at a specific time point. Through the real-time monitoring system, this voltage value can be obtained to reflect the working state of the heater. For example, when the third working voltage is 220V, it means the voltage of the heater during current operation is 220 volts.

[0064] The third working current refers to the current value of the film type high-pressure heater at a specific time point. This current value reflects the current load condition of the heater. For example, when the third working current is 2A, it means the current of the heater at this moment is 2 amperes.

[0065] In some embodiments, the working voltage and current data of the heater can be collected regularly within the set time period. For example, these data can be obtained through the voltage and current sensors built in the heater. If the preset time period is 1 second, then the voltage and current data of the heater are recorded every 1 second. For example, at a certain moment, the third working voltage is collected as 220V and the third working current is 2A.

[0066] S20, calculate the instantaneous power based on the third working voltage and the third working current.

[0067] The instantaneous power refers to the power value calculated from the voltage and current at a certain moment, which can be calculated by the formula P = U×I, where P is the power, U is the voltage, and I is the current. For example, when the voltage is 220V and the current is 2A, the instantaneous power is: P = 220V×2A = 440W.

[0068] The instantaneous power can be calculated according to the values of the third working voltage and the third working current using the power formula P = U×I.

[0069] S30, perform a moving average filtering process on the most recent preset number of instantaneous powers to determine the current actual power capacity.

[0070] The preset quantity refers to the number of data points involved in the moving average filtering process. For example, the preset quantity can be 5, 10, or 20 data points, indicating that the calculation of the average value will refer to the most recent 5, 10, or 20 instantaneous power values.

[0071] Moving average filtering is a data processing technique used to smooth time series data and reduce the influence of noise and outliers. The calculation method of moving average filtering is to output the average value of continuous data points as the new value, and gradually slide the window pane to cover the data.

[0072] In some embodiments, a moving average calculation can be performed on the most recent instantaneous power values (such as the most recent 5 instantaneous power values) to obtain a smoothed power value, eliminating data fluctuations caused by instantaneous changes.

[0073] The power value after moving average processing is the current actual power capacity.

[0074] Step 202: Use the duty cycle adjustment factor as the input for PI control adjustment to calculate the pre-adjustment amount of the duty cycle.

[0075] PI control refers to proportional-integral control. Proportional-integral control is a common feedback control method that adjusts the system by combining the proportional term and the integral term. The proportional term control is adjusted based on the current error, while the integral term is adjusted according to the cumulative history of the error.

[0076] The pre-adjustment amount of the duty cycle is the duty cycle adjustment amount calculated based on the duty cycle adjustment factor and PI control. It can be a floating value used to fine-tune the actual duty cycle.

[0077] In some embodiments, the duty cycle adjustment factor can be input into the PI control algorithm. The PI controller calculates the proportional control and the cumulative error based on the current power deviation, thereby generating the pre-adjustment amount of the duty cycle.

[0078] In some embodiments, the duty cycle adjustment factor is used as the input for PI control adjustment to calculate the pre-adjustment amount of the duty cycle, where the duty cycle adjustment factor is the ratio of the power deviation to the current actual power capacity.

[0079] The electronic device can calculate the pre-adjustment amount of the duty cycle through the following formula (1):

[0080]

[0081] where ΔD is the pre-adjustment amount of the duty cycle, K p is the proportional coefficient for controlling the immediate response intensity of the power deviation, K iis the integral coefficient for eliminating the influence of steady-state error, ΔP is the power deviation, P1 is the current actual power capacity, and dt is the integration time step. The integration time step can be 1 s, 2 s, etc.

[0082] By correlating the resistance change rate with the proportional coefficient and the integral coefficient, the system can be self-regulated according to the real-time feedback of the working state. When the system encounters different external environmental changes, it can automatically optimize the working parameters according to the preset rules and measurement data, reducing the cumbersome process of system adjustment and improving the accuracy of power control.

[0083] In some embodiments, the integral coefficient and the proportional coefficient can be determined by the following operations.

[0084] S20. In the controller initialization stage, apply a stepped voltage to the membrane type high-pressure heater and measure the corresponding stepped current.

[0085] The stepped voltage refers to the voltage applied to the heater that gradually increases or decreases in a certain step. The stepped voltage helps to observe the response of the heater to different voltages. For example, assume starting from 100 V and increasing to 105 V, 110 V, 115 V,..., 500 V, etc. to form a stepped voltage.

[0086] The stepped current is the current value corresponding to the stepped voltage, indicating the current measured at each stepped voltage. The magnitude of the current depends on the resistance of the heater and the magnitude of the applied voltage. For example, when a 5 V voltage is applied, the measured current may be 0.5 A, and when a 10 V voltage is applied, the current may be 1 A.

[0087] In some embodiments, a stepped voltage can be applied to the membrane type high-pressure heater, the voltage can be gradually increased, and the current can be measured and recorded at each stepped voltage. For example, start by applying 0 V voltage and measuring the current as 0 A, then apply 5 V voltage and record the current as 0.5 A, and so on, gradually increasing the voltage to obtain the corresponding current values.

[0088] It should be noted that the voltages and currents in the above examples are intended to illustrate the variation relationship between voltage and current, and their specific voltage values and current values are not limited to the magnitudes shown in the examples, and they can vary with the specific magnitude of the voltage applied during measurement. Similarly, the examples of time, resistance values, etc. involved in other some embodiments are also for illustrative purposes only.

[0089] S21. Based on the stepped voltage and the stepped current, calculate the measured resistance values at each voltage.

[0090] The measured resistance value is the resistance value calculated according to Ohm's law. According to Ohm's law, the measured resistance value can be calculated. For example, using Ohm's law, the measured resistance value at each voltage is calculated based on each step voltage and the corresponding step current value.

[0091] S22. Determine the resistance value dynamic range according to the measured resistance value, and calculate the resistance value change rate.

[0092] The resistance value dynamic range refers to the range of resistance values measured when different voltages are applied. The resistance value dynamic range is used to represent the sensitivity and range of the system response. For example, if the resistance values measured at different voltages are 10Ω, 12Ω, and 14Ω, the resistance value dynamic range is from 10Ω to 14Ω.

[0093] In some embodiments, based on the resistance values at each voltage calculated in S21, the maximum value and the minimum value among these resistance values can be found, and the dynamic range of the resistance value can be calculated.

[0094] S23. Based on the resistance value change rate, determine the proportional coefficient and the integral coefficient.

[0095] The resistance value change rate refers to the change rate of the resistance value at different voltages.

[0096] The electronic device can calculate the resistance value change rate based on the measured resistance value and the voltage change. According to the calculated resistance value change rate, the proportional coefficient and the integral coefficient can be adjusted. The specific adjustment method can be set according to experimental data or the response requirements of the system.

[0097] For example, the proportional coefficient and the integral coefficient can be determined based on the resistance value change rate in the following way: determine the coefficient interval corresponding to the resistance value change rate; wherein, the coefficient interval is obtained by dividing the resistance value change rate into intervals and presetting the corresponding proportional coefficient and integral coefficient for each interval; according to the preset coefficient determination rule, determine the proportional coefficient and the integral coefficient from the coefficient interval.

[0098] The coefficient interval refers to different ranges divided according to the resistance value change rate. Each range corresponds to one or more specific proportional coefficients and integral coefficients. The coefficient interval can be preset according to experimental data or theoretical derivation.

[0099] For example, by analyzing the resistance value change rate, it can be divided into multiple intervals. The range of each interval can be set according to experimental data or the control requirements of the system.

[0100] According to the divided intervals of the resistance change rate, the proportionality coefficient and the integral coefficient corresponding to each interval can be preset. Exemplarily, according to the experimental results, if the resistance change rate is 0.3 Ω / V, which belongs to the first interval, the preset proportionality coefficient is 0.5 and the integral coefficient is 0.1. If the change rate is 0.7 Ω / V, which belongs to the second interval, the proportionality coefficient may be 0.6 and the integral coefficient is 0.15.

[0101] The preset coefficient determination rule refers to the rule of determining how to select appropriate proportionality coefficient and integral coefficient from a given coefficient interval according to experimental data or the design requirements of the control system. For example, the preset coefficient determination rule may be: if the resistance change rate is in the interval of 0 to 0.5 Ω / V, then select the proportionality coefficient 0.5 and the integral coefficient 0.1; if the resistance change rate is between 0.5 and 1.0 Ω / V, then select the proportionality coefficient 0.7 and the integral coefficient 0.2.

[0102] In this embodiment, by dividing the intervals of the resistance change rate, presetting the proportionality coefficient and the integral coefficient for each interval, and combining with the preset coefficient determination rule, the proportionality coefficient and the integral coefficient suitable for the current situation are finally determined, ensuring operability and accuracy.

[0103] Step 203: Perform a clipping process on the duty cycle pre-adjustment amount to limit the single adjustment amount not to exceed the preset value.

[0104] The clipping process is to limit the calculated duty cycle pre-adjustment amount to ensure that the amplitude of each adjustment does not exceed the set maximum adjustment value. For example, if the set maximum adjustment value is 3%, then even if the calculated pre-adjustment amount is 5%, after the clipping process, the adjustment amount will be limited to 3%.

[0105] The preset value is the maximum adjustable amplitude set according to the working requirements of the heater and the control system. For example, the preset value can be 1%, 2%, 3%, etc.

[0106] If the duty cycle pre-adjustment amount exceeds the preset value (such as 2%), then limit the adjustment amount to the maximum value.

[0107] Step 204: Determine the target duty cycle based on the actual duty cycle and the duty cycle adjustment amount after the clipping process.

[0108] The actual duty cycle is the actual duty cycle when the heater is currently operating. For example, if the current duty cycle is 50%, it means that the heater is on for 50% of a cycle.

[0109] The target duty cycle is the new duty cycle that the system hopes to achieve after adjustment. The target duty cycle can be calculated based on the current state and the adjustment strategy. For example, take the sum of the actual duty cycle and the duty cycle adjustment amount after the clipping process as the target duty cycle.

[0110] In some embodiments, the electronic device can iteratively execute the following steps to stabilize the actual operating power within the error range allowed by the target operating power:

[0111] S30. Execute the target duty cycle, obtain the second operating current and the second operating voltage of the membrane high-pressure heater, and calculate the actual operating power.

[0112] S31. Calculate the power deviation based on the actual operating power and the target operating power, and perform duty cycle limiting adjustment when the power deviation exceeds a preset deviation threshold.

[0113] A detailed description of the execution of the above iterative steps can be found in the previous text. By means of iterative execution, more precise control of the power of the membrane heater can be achieved. By more precisely controlling the relationship between voltage and current, the system can provide higher heat energy output without wasting energy, optimizing energy use. This can significantly reduce energy consumption and improve energy utilization for devices that need to operate stably for a long time, such as membrane high-pressure heaters.

[0114] Based on the same inventive concept, an embodiment of the present application also provides a power response control system for a membrane high-pressure heater. The system includes:

[0115] A first acquisition module, configured to acquire the first operating current and the second operating voltage after the membrane high-pressure heater is started; wherein, the membrane high-pressure heater operates at a preset low duty cycle;

[0116] A first power calculation module, configured to calculate the current maximum operating power based on the first operating current and the first operating voltage;

[0117] A second acquisition module, configured to acquire the target operating power, and determine an initial duty cycle based on the current maximum operating power and the target operating power;

[0118] A second power calculation module, configured to execute the initial duty cycle, acquire the second operating current and the second operating voltage of the membrane high-pressure heater, and calculate the actual operating power;

[0119] An adjustment module, configured to calculate the power deviation based on the actual operating power and the target operating power, and perform duty cycle limiting adjustment when the power deviation exceeds a preset deviation threshold, so as to stabilize the actual operating power within the error range allowed by the target operating power.

[0120] As Figure 3As shown in the figure, an embodiment of the present application provides an electronic device, including a processor 111, a communication interface 112, a memory 113, and a communication bus 114. Among them, the processor 111, the communication interface 112, and the memory 113 complete communication with each other through the communication bus 114.

[0121] The memory 113 is used to store computer programs.

[0122] In an embodiment of the present application, when the processor 111 is used to execute the program stored on the memory 113, it implements the method for controlling the power response of the film type high-pressure heater provided in any one of the foregoing method embodiments, including:

[0123] Obtain the first working current and the second working voltage after the film type high-pressure heater is started; wherein, the film type high-pressure heater operates at a preset low duty cycle.

[0124] Based on the first working current and the first working voltage, calculate the current maximum working power.

[0125] Obtain the target working power, and based on the current maximum working power and the target working power, determine the initial duty cycle.

[0126] Execute the initial duty cycle, obtain the second working current and the second working voltage of the film type high-pressure heater during operation, and calculate the actual working power.

[0127] Based on the actual working power and the target working power, calculate the power deviation, and when the power deviation exceeds the preset deviation threshold, perform duty cycle limiting adjustment to stabilize the actual working power within the error range allowed by the target working power.

[0128] An embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the steps of the method for controlling the power response of the film type high-pressure heater provided in any one of the foregoing method embodiments.

[0129] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0130] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A power response control method for a membrane type high-pressure heater, characterized in that, The method includes: Obtaining a first operating current and a second operating voltage after the start of the film-type high-pressure heater; wherein, the film-type high-pressure heater operates at a preset low duty cycle; Calculating the current maximum operating power based on the first operating current and the first operating voltage; Obtaining a target operating power, and determining an initial duty cycle based on the current maximum operating power and the target operating power; Executing the initial duty cycle, obtaining a second operating current and a second operating voltage of the film-type high-pressure heater during operation, and calculating the actual operating power; Calculating a power deviation based on the actual operating power and the target operating power, and when the power deviation exceeds a preset deviation threshold, performing duty cycle limiting adjustment to stabilize the actual operating power within the error range allowed by the target operating power.

2. The method according to claim 1, wherein The performing of the duty cycle limiting adjustment includes: Calculating a duty cycle adjustment factor based on the power deviation and the current actual power capacity of the film-type high-pressure heater; Taking the duty cycle adjustment factor as the input of PI control adjustment, and calculating a pre-adjustment amount of the duty cycle; Performing a limiting process on the pre-adjustment amount of the duty cycle to limit the single adjustment amount not to exceed a preset value; Determining a target duty cycle based on the actual duty cycle and the duty cycle adjustment amount after the limiting process.

3. The method according to claim 2, wherein The method further includes: Iteratively executing the following steps to stabilize the actual operating power within the error range allowed by the target operating power: Executing the target duty cycle, obtaining a second operating current and a second operating voltage of the film-type high-pressure heater during operation, and calculating the actual operating power; Calculating a power deviation based on the actual operating power and the target operating power, and when the power deviation exceeds a preset deviation threshold, performing duty cycle limiting adjustment.

4. The method according to claim 2, wherein The current actual power capacity is obtained through the following method: Collecting a third operating voltage and a third operating current of the film-type high-pressure heater according to a preset time period; Calculating an instantaneous power based on the third operating voltage and the third operating current; Performing a moving average filtering process on the instantaneous powers of the most recent preset number to determine the current actual power capacity.

5. The method according to claim 2, wherein The taking the duty cycle adjustment factor as the input of PI control adjustment and calculating a pre-adjustment amount of the duty cycle includes: The duty cycle adjustment factor is the ratio of the power deviation to the current actual power capacity; The pre-adjustment amount of the duty cycle is calculated through the following formula: Among them, ΔD is the duty cycle pre-adjustment amount, and K p is the proportional coefficient for controlling the immediate response intensity of the power deviation, and K i is the integral coefficient for eliminating the influence of the steady-state error. ΔP is the power deviation, P1 is the current actual power capability, and dt is the integral time step.

6. The method according to claim 5, wherein The method further includes: During the initialization stage of the controller, applying a stepped voltage to the film-type high-pressure heater and measuring the corresponding stepped current; Calculating the measured resistance values at each voltage based on the stepped voltage and the stepped current; Determining the dynamic range of the resistance values according to the measured resistance values, and calculating the resistance change rate; Determining the proportional coefficient and the integral coefficient based on the resistance change rate.

7. The method according to claim 6, characterized in that, The determining the proportional coefficient and the integral coefficient based on the resistance change rate includes: Determining the coefficient interval corresponding to the resistance change rate; wherein, the coefficient interval is obtained by dividing the resistance change rate into intervals and presetting corresponding proportional coefficients and integral coefficients for each interval; Determine the proportional coefficient and the integral coefficient from within the coefficient range according to the preset coefficient determination rule.

8. A power response control system for a membrane type high-pressure heater, characterized in that, The system includes: A first acquisition module, configured to acquire a first operating current and a second operating voltage after the start of a membrane type high-pressure heater; wherein, the membrane type high-pressure heater operates at a preset low duty cycle; A first power calculation module, configured to calculate the current maximum operating power based on the first operating current and the first operating voltage; A second acquisition module, configured to acquire a target operating power and determine an initial duty cycle based on the current maximum operating power and the target operating power; A second power calculation module, configured to execute the initial duty cycle, acquire a second operating current and a second operating voltage of the membrane type high-pressure heater during operation, and calculate the actual operating power; An adjustment module, configured to calculate a power deviation based on the actual operating power and the target operating power, and perform duty cycle limiting adjustment when the power deviation exceeds a preset deviation threshold, so as to stabilize the actual operating power within the error range allowed by the target operating power.

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