Drainage system liquid level control method and device based on full-automatic decoupling fuzzy control

Abstract

The invention relates to the technical field of coupling system control, and discloses a drainage system liquid level control method and device based on full-automatic decoupling fuzzy control, and the method comprises the steps: detecting a drainage tank liquid level deviation value and a drainage pump frequency conversion deviation value of a drainage system, and inputting the values into a fuzzy rule base; the independent output frequency converter outputs a frequency regulating variable and a pump outlet control valve opening regulating variable; in response to the cooperative control instruction, closed-loop control is conducted on the liquid level through a single-loop PID controller according to the output frequency adjusting amount of the frequency converter, and the opening degree of a pump outlet control valve is controlled according to the opening degree adjusting amount; when the output frequency of the frequency converter reaches the upper limit and lasts for preset duration, the opening degree is increased according to the specified step length, and upper limit alarm is triggered; and when the output frequency of the frequency converter reaches the lower limit and lasts for a preset duration, reducing the opening degree according to a specified step length and triggering lower limit alarm. The device can effectively cope with complex working conditions such as valve nonlinearity and equipment coupling, personnel operation and maintenance are facilitated, and efficient and automatic control over the liquid level of the drainage system is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coupling system control, and in particular to a liquid level control method and device for a drainage system based on full-automatic decoupling fuzzy control. BACKGROUND

[0002] Under the background of upgrading and reconstruction of industrial thermal production systems, many systems are facing the problem of automatic control. For industrial scenarios such as power plant drainage systems, which cannot be subjected to online dynamic testing, the traditional automatic control strategy has obvious defects. On the one hand, it relies on accurate mathematical models, and it is difficult to dynamically model online in actual industrial systems. On the other hand, the traditional control strategy has high requirements for the regulation quality of equipment, and it is difficult to adapt to complex working conditions such as valve nonlinearity and equipment coupling. Existing decoupling strategies such as PID double-loop and Smith predictor have complex logic and are difficult to maintain, which is not conducive to the understanding and operation of production personnel and maintenance personnel, and it is difficult to meet the demand for low modeling cost and high robustness of automatic control.

[0003] Therefore, there is an urgent need to provide a technical solution to solve the above problems. SUMMARY

[0004] To solve the above technical problems, the present application provides a liquid level control method and device for a drainage system based on full-automatic decoupling fuzzy control.

[0005] In a first aspect, the present application provides a liquid level control method for a drainage system based on full-automatic decoupling fuzzy control, and the technical scheme of the method is as follows: Real-time detection of the liquid level deviation value of the drainage tank in the drainage system and the variable frequency instruction feedback deviation value of the variable frequency drainage pump in the drainage system; Inputting the liquid level deviation value and the variable frequency instruction feedback deviation value into a preset fuzzy rule base, and independently outputting the variable frequency converter output frequency regulation amount of the variable frequency drainage pump and the opening regulation amount of the pump outlet regulating valve; In response to the double-device cooperative automatic control instruction, the liquid level of the drainage tank is controlled in a closed loop by a single-loop PID controller according to the variable frequency converter output frequency regulation amount, and the opening of the pump outlet regulating valve is controlled by the corresponding actuator of the pump outlet regulating valve according to the opening regulation amount, so as to dynamically constrain the opening range and maintain the economic operation of the variable frequency drainage pump; When the variable frequency converter output frequency reaches the preset upper frequency threshold and lasts for a first preset time length, the opening value of the pump outlet regulating valve is increased by a specified step and a variable frequency output upper limit alarm is triggered; when the variable frequency converter output frequency reaches the preset lower frequency threshold and lasts for a second preset time length, the opening value of the pump outlet regulating valve is decreased by the specified step and a variable frequency output lower limit alarm is triggered.

[0006] The hydrophobic system liquid level control method based on the full-automatic decoupling fuzzy control has the following beneficial effects: The method solves the problems of traditional control strategies in modeling cost, robustness, complexity and the like, reduces the dependence on equipment adjustment quality, effectively deals with complex working conditions such as valve nonlinearity and equipment coupling, is convenient for personnel operation and maintenance, and realizes efficient automatic control of the hydrophobic system liquid level.

[0007] Based on the above scheme, the hydrophobic system liquid level control method based on the full-automatic decoupling fuzzy control can be further improved as follows.

[0008] In an optional mode, the step of detecting the liquid level deviation value of the hydrophobic tank in the hydrophobic system and the variable frequency instruction feedback deviation value of the variable frequency hydrophobic pump in the hydrophobic system in real time comprises: acquiring real-time liquid level data of the hydrophobic tank through a pressure transmitter, and determining a difference between the real-time liquid level data and a preset liquid level set value of the hydrophobic tank as the liquid level deviation value; acquiring an actual output frequency value through a variable frequency converter feedback interface of the variable frequency hydrophobic pump, and determining a difference between the actual output frequency value and a variable frequency converter output frequency instruction value of the variable frequency hydrophobic pump as the variable frequency instruction feedback deviation value.

[0009] In an optional mode, the step of inputting the liquid level deviation value and the variable frequency instruction feedback deviation value into a preset fuzzy rule base and independently outputting a variable frequency converter output frequency adjustment amount of the variable frequency hydrophobic pump and an opening adjustment amount of a pump outlet regulating valve comprises: quantizing the liquid level deviation value into discrete liquid level fuzzy grades, and quantizing the variable frequency instruction feedback deviation value into discrete variable frequency fuzzy grades; matching a target cooperative control strategy corresponding to the liquid level fuzzy grades and the variable frequency fuzzy grades according to a preset artificial experience mapping relationship in the fuzzy rule base; converting the target cooperative control strategy into the variable frequency converter output frequency adjustment amount and the opening adjustment amount and independently outputting them.

[0010] In an optional mode, the step of performing closed-loop control on the liquid level of the hydrophobic tank through a single-loop PID controller according to the variable frequency converter output frequency adjustment amount comprises: superimposing the variable frequency converter output frequency adjustment amount on a current variable frequency converter output frequency instruction value of the variable frequency hydrophobic pump to generate a target frequency instruction value; calculating a frequency compensation value through the single-loop PID controller based on the liquid level deviation value; The sum of the target frequency instruction value and the frequency compensation value is taken as a final frequency converter output frequency instruction value, and is output to a frequency converter execution unit of the frequency converter of the pump to perform closed-loop control on the liquid level of the pump.

[0011] In an alternative way, the step of controlling the opening of the pump outlet throttle valve by the corresponding actuator of the pump outlet throttle valve according to the opening adjustment amount comprises: The opening adjustment amount is superimposed on the current opening value of the pump outlet throttle valve to generate a target opening instruction value; A judgment result is obtained by judging whether the target opening instruction value exceeds a preset opening safety range; When the judgment result is no, the target opening instruction value is directly output to the actuator to drive the pump outlet throttle valve to adjust to the physical opening position corresponding to the target opening instruction value; When the judgment result is yes, the boundary value of the preset opening safety range is taken as a corrected opening instruction value and is output to the actuator to drive the pump outlet throttle valve to adjust to the physical opening position corresponding to the corrected opening instruction value.

[0012] In an alternative way, when the frequency converter output frequency reaches a preset upper frequency threshold and lasts for a first preset time length, the step of increasing the opening value of the pump outlet throttle valve by a specified step and triggering an upper limit alarm of the frequency converter output comprises: The frequency converter output frequency of the frequency converter of the pump is continuously monitored, and a timer is started when it is detected that the frequency converter output frequency is greater than or equal to the preset upper frequency threshold; If the timer reaches the first preset time length, the current opening value of the pump outlet throttle valve is increased by the specified step to generate a first updated opening instruction value, which is output to the actuator to drive the pump outlet throttle valve to adjust to the physical opening position corresponding to the first updated opening instruction value; An upper limit alarm signal of the frequency converter output frequency is synchronously sent to a target terminal; When the frequency converter output frequency reaches a preset lower frequency threshold and lasts for a second preset time length, the step of decreasing the opening value of the pump outlet throttle valve by the specified step and triggering a lower limit alarm of the frequency converter output comprises: The frequency converter output frequency of the frequency converter of the pump is continuously monitored, and a timer is started when it is detected that the frequency converter output frequency is less than or equal to the preset lower frequency threshold; If the timer reaches the second preset time length, the current opening value of the pump outlet governor is reduced by a specified step, a second updated opening instruction value is generated and output to the actuator to drive the pump outlet governor to adjust to a physical opening position corresponding to the second updated opening instruction value through the actuator; Synchronously send a variable frequency output frequency lower limit alarm signal to the target terminal.

[0013] In an optional mode, the method further comprises: In response to a variable frequency drain pump automatic control instruction, the liquid level of the drain tank is controlled in a closed loop by the single-loop PID controller according to the variable frequency output frequency adjustment amount, while the pump outlet governor is kept in a manual control state; In response to a pump outlet governor automatic control instruction, the opening of the pump outlet governor is controlled by the actuator according to the opening adjustment amount to dynamically constrain the opening range, while the variable frequency drain pump is kept in a manual control state.

[0014] In a second aspect, the application provides a drain system liquid level control device based on full-automatic decoupling fuzzy control, and the technical scheme of the device is as follows: The device comprises a deviation acquisition module, an adjustment generation module, a cooperative control module and a dynamic adjustment module. The deviation acquisition module is configured to detect the liquid level deviation value of the drain tank in the drain system and the variable frequency instruction feedback deviation value of the variable frequency drain pump in the drain system in real time. The adjustment generation module is configured to input the liquid level deviation value and the variable frequency instruction feedback deviation value into a preset fuzzy rule base, and independently output the variable frequency output frequency adjustment amount of the variable frequency drain pump and the opening adjustment amount of the pump outlet governor. The cooperative control module is configured to, in response to a double-device cooperative automatic control instruction, control the liquid level of the drain tank in a closed loop by a single-loop PID controller according to the variable frequency output frequency adjustment amount, and control the opening of the pump outlet governor by the corresponding actuator of the pump outlet governor according to the opening adjustment amount, so as to dynamically constrain the opening range and maintain the economic operation of the variable frequency drain pump. The dynamic adjustment module is configured to, when the variable frequency output frequency reaches a preset upper frequency threshold and lasts for a first preset time length, increase the opening value of the pump outlet governor by a specified step and trigger a variable frequency output upper limit alarm; and when the variable frequency output frequency reaches a preset lower frequency threshold and lasts for a second preset time length, decrease the opening value of the pump outlet governor by the specified step and trigger a variable frequency output lower limit alarm.

[0015] The drain system liquid level control device based on full-automatic decoupling fuzzy control has the following beneficial effects: The device of the present application can effectively solve the deficiencies of the traditional control strategy in aspects of modeling cost, robustness, complexity, etc., reduce the dependence on the equipment adjustment quality, and effectively cope with the complex working conditions such as valve nonlinearity and equipment coupling, facilitate personnel operation and maintenance, so as to realize efficient automatic control of the liquid level of the drainage system.

[0016] In a third aspect, a technical solution of an electronic device of the present application is as follows: The processor implements the steps of the method for controlling the liquid level of the drainage system based on full-automatic decoupling fuzzy control of the present application when executing the program.

[0017] In a fourth aspect, a technical solution of a computer readable storage medium provided by the present application is as follows: The computer readable storage medium stores instructions, and when the computer readable storage medium reads the instructions, the computer readable storage medium executes the steps of the method for controlling the liquid level of the drainage system based on full-automatic decoupling fuzzy control of the present application.

[0018] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are only used to show the embodiments, and are not considered as limiting the present application. Moreover, the same reference signs are used to represent the same parts throughout the drawings. In the drawings: Figure 1 A flowchart of an embodiment of a method for controlling the liquid level of the drainage system based on full-automatic decoupling fuzzy control of the present application; Figure 2 A schematic diagram of a double-device cooperative control logic flow; Figure 3 A structural schematic diagram of an embodiment of a device for controlling the liquid level of the drainage system based on full-automatic decoupling fuzzy control of the present application; Figure 4 A structural schematic diagram of an embodiment of an electronic device of the present application. DETAILED DESCRIPTION

[0020] Exemplary embodiments of the present application will be described below in greater detail with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein.

[0021] Figure 1A flowchart of an embodiment of a liquid level control method for a drainage system based on full-automatic decoupling fuzzy control is shown, which can be executed by terminal equipment or server and the like electronic equipment. The terminal equipment can be any fixed or mobile terminal such as user equipment (UE), mobile equipment, user terminal, terminal, cellular phone, cordless phone, personal digital assistant (PDA), handheld device, computing device, vehicle-mounted device, wearable device, etc. The server can be a single server or a server cluster composed of multiple servers. Any electronic equipment can realize the liquid level control method for a drainage system based on full-automatic decoupling fuzzy control by calling computer readable instructions stored in the memory through the processor. As shown in Figure 1 the following steps are included: S1, real-time detection of the liquid level deviation value of the drainage tank in the drainage system and the variable frequency instruction feedback deviation value of the variable frequency drainage pump in the drainage system.

[0022] The drainage system refers to a system composed of pipelines and equipment for collecting and transporting condensate water and steam in a thermal cycle of a power plant, including a drainage tank, a drainage pump, and a valve assembly. The drainage tank refers to a pressure vessel for temporarily storing condensate water in the drainage system, and its liquid level is the controlled object. The liquid level deviation value refers to the difference between the real-time liquid level data of the drainage tank and the preset liquid level set value, which is used to represent the liquid level control error. The variable frequency drainage pump refers to a drainage delivery pump whose speed is adjusted by a frequency converter, and its working frequency directly affects the drainage flow. The variable frequency instruction feedback deviation value refers to the difference between the output frequency instruction value of the frequency converter and the actual output frequency value, which is used to reflect the execution lag state of the frequency converter.

[0023] S2, inputting the liquid level deviation value and the variable frequency instruction feedback deviation value into a preset fuzzy rule base, and independently outputting the frequency converter output frequency adjustment amount of the variable frequency drainage pump and the opening adjustment amount of the pump outlet valve.

[0024] The fuzzy rule base refers to a set of mapping relationships constructed based on human operation experience, which is used to convert the input deviation amount into equipment adjustment instructions. The frequency converter output frequency adjustment amount refers to the frequency adjustment increment value output by the fuzzy rule base, which is used to dynamically correct the pump speed. The opening adjustment amount refers to the opening adjustment increment value output by the fuzzy rule base, which is used to control the opening and closing degree of the valve.

[0025] S3, in response to the double-device cooperative automatic control instruction, the liquid level of the drain tank is controlled in a closed loop by a single-loop PID controller according to the frequency adjustment amount of the frequency converter, and the opening of the pump outlet regulating valve is controlled by an actuator corresponding to the pump outlet regulating valve according to the opening adjustment amount, so as to dynamically constrain the opening range and maintain the economic operation of the frequency conversion drain pump.

[0026] The double-device cooperative automatic control instruction is a control signal for triggering the frequency conversion drain pump and the pump outlet regulating valve to run automatically at the same time. The single-loop PID controller is a closed-loop controller that only takes the liquid level deviation as input and outputs a frequency compensation value through a proportional-integral-derivative algorithm. The actuator is an electric or pneumatic mechanical device that receives an electric signal to drive the pump outlet regulating valve to act.

[0027] S4, when the output frequency of the frequency converter reaches the preset upper limit threshold of the frequency and lasts for a first preset time length, the opening value of the pump outlet regulating valve is increased by a specified step and a frequency output upper limit alarm is triggered; when the output frequency of the frequency converter reaches the preset lower limit threshold of the frequency and lasts for a second preset time length, the opening value of the pump outlet regulating valve is decreased by the specified step and a frequency output lower limit alarm is triggered.

[0028] The preset upper limit threshold of the frequency is the maximum safe operating value of the output frequency of the frequency converter, and exceeding this value may damage the equipment. The first preset time length is the minimum duration for which the output frequency of the frequency converter exceeds the upper limit threshold, used to determine the effective over-limit. The specified step is a fixed change amount for single adjustment of the opening of the pump outlet regulating valve, used to avoid overshoot of the valve action. The frequency output upper limit alarm is a device over-limit warning signal triggered when the output frequency of the frequency converter reaches the upper limit threshold and lasts for the first preset time length. The second preset time length is the minimum duration for which the output frequency of the frequency converter is below the lower limit threshold, used to determine the effective under-limit. The frequency output lower limit alarm is a device under-load warning signal triggered when the output frequency of the frequency converter reaches the lower limit threshold and lasts for the second preset time length.

[0029] It should be noted that in this embodiment, the lower limit value (10%) of the opening of the pump outlet regulating valve is set to avoid damage to the equipment due to excessive throttling cavitation caused by too small opening. At the same time, when the frequency conversion drain pump approaches the output limit, the opening is adjusted step by step to share the flow load, reduce the throttling loss of the water pump, and give priority to the energy-saving advantage of frequency conversion speed regulation, so as to ultimately achieve a balance between equipment safety and operating economy.

[0030] The technical scheme of this embodiment effectively solves the deficiencies of traditional control strategies in terms of modeling cost, robustness, complexity, etc., reduces the dependence on equipment adjustment quality, and can effectively cope with complex conditions such as valve nonlinearity and equipment coupling, facilitating personnel operation and maintenance, thereby realizing efficient automatic control of the liquid level of the drain system.

[0031] In an alternative way, step S1 comprises: S11, collecting real-time liquid level data of the drain tank by the pressure transmitter, and determining the difference between the real-time liquid level data and the preset liquid level set value of the drain tank as the liquid level deviation value.

[0032] Wherein, the pressure transmitter refers to a sensor installed on the drain tank, which converts the liquid level height into a standard electrical signal. The real-time liquid level data refers to the liquid level height measurement value of the drain tank collected by the pressure transmitter in real time. The preset liquid level set value refers to the target height value of the liquid level control of the drain tank.

[0033] S12, collecting the actual output frequency value through the frequency converter feedback interface of the variable frequency drain pump, and determining the difference between the actual output frequency value and the frequency converter output frequency instruction value of the variable frequency drain pump as the variable frequency instruction feedback deviation value.

[0034] Wherein, the frequency converter feedback interface refers to the communication or analog interface of the frequency converter that outputs the actual running frequency data. The actual output frequency value refers to the real-time running frequency of the pump output by the frequency converter feedback interface.

[0035] In the above alternative way, further data collection by the pressure transmitter and the frequency converter feedback interface provides real-time liquid level deviation and variable frequency instruction feedback deviation, which provides data support for subsequent accurate control and guarantees the timeliness and accuracy of the liquid level control of the drain system.

[0036] In an alternative way, step S2 comprises: S21, quantifying the liquid level deviation value into discrete liquid level fuzzy levels, and quantifying the variable frequency instruction feedback deviation value into discrete variable frequency fuzzy levels.

[0037] Wherein, the liquid level fuzzy level refers to quantifying the continuous liquid level deviation value into a discrete fuzzy set label, including negative large / negative small / zero / positive small / positive large. The variable frequency fuzzy level refers to quantifying the continuous variable frequency deviation value into a discrete fuzzy set label, including negative large / negative small / zero / positive small / positive large.

[0038] Specifically, the liquid level deviation value detected in real time is input into a fuzzification processing unit, and the continuous quantity is mapped into a discrete liquid level fuzzy level set through a preset membership function. The liquid level fuzzy level set contains five fuzzy levels of negative large, negative small, zero, positive small, and positive large. At the same time, the variable frequency instruction feedback deviation value is input into an independent fuzzification processing unit, and is mapped into a variable frequency fuzzy level set containing five levels of negative large, negative small, zero, positive small, and positive large through the same principle. The quantization process of the fuzzification processing unit adopts a triangular membership function, and the domain range of the membership function is set according to the historical operation data of the drain system.

[0039] S22, matching the target cooperative control strategy corresponding to the liquid level fuzzy grade and the frequency conversion fuzzy grade according to the preset artificial experience mapping relationship in the fuzzy rule base.

[0040] The target cooperative control strategy refers to the device cooperative action decision output after matching the liquid level and the frequency conversion fuzzy grade in the fuzzy rule base.

[0041] Specifically, the liquid level fuzzy grade and the frequency conversion fuzzy grade are combined as a query condition to match the target cooperative control strategy corresponding to the liquid level fuzzy grade and the frequency conversion fuzzy grade from the fuzzy rule base based on the preset artificial experience mapping relationship stored in the fuzzy rule base. It should be noted that the fuzzy rule base adopts a two-dimensional decision table structure, the row index corresponds to the liquid level fuzzy grade, the column index corresponds to the frequency conversion fuzzy grade, and each intersection unit stores the cooperative control strategy summarized from artificial operation experience. The cooperative control strategy is described in the form of fuzzy language variables, including double decisions of the frequency converter output frequency adjustment direction and amplitude and the pump outlet damper opening adjustment direction and amplitude.

[0042] S23, converting the target cooperative control strategy into the frequency converter output frequency adjustment amount and the opening adjustment amount and independently outputting.

[0043] Specifically, the target cooperative control strategy is input into a defuzzification processing unit, a gravity method defuzzification algorithm is adopted to convert the frequency adjustment strategy described in fuzzy language into an accurate frequency converter output frequency adjustment amount value. At the same time, through an independent defuzzification channel, the opening adjustment strategy is converted into an accurate pump outlet damper opening adjustment amount value. The two adjustment amounts are output to the frequency drainage pump control system and the damper actuator respectively to realize decoupling control.

[0044] It should be noted that the defuzzification channel is an output conversion link of the fuzzy controller, which receives the target cooperative control strategy generated by the fuzzy rule base (described in the form of fuzzy language variables), converts the fuzzy amount into an accurate adjustment amount value through a mathematical algorithm, and finally outputs to the execution device. The sampling period of the defuzzification output in the embodiment is set to 200 milliseconds, which is synchronized with the fuzzy quantization processing period.

[0045] In the above optional mode, the deviation value is further quantized into a fuzzy grade, the control strategy is matched according to the fuzzy rule base and converted into an adjustment amount output, which realizes flexible response to complex working conditions and improves the adaptability and reliability of the liquid level control of the drainage system.

[0046] In an optional mode, the step of performing closed-loop control on the liquid level of the drainage tank through a single-loop PID controller according to the frequency converter output frequency adjustment amount includes: The frequency adjustment amount of the frequency converter is superimposed on the current frequency converter output frequency instruction value of the frequency conversion drainage pump to generate a target frequency instruction value.

[0047] The current frequency converter output frequency instruction value is a frequency setting value output to the frequency converter in the last cycle. The target frequency instruction value is a frequency setting value generated by superimposing the current frequency converter output frequency instruction value and the frequency converter output frequency adjustment amount.

[0048] Specifically, the current frequency converter output frequency instruction value of the frequency conversion drainage pump is obtained in real time as a basic instruction value; the frequency converter output frequency adjustment amount independently output by the fuzzy rule base is algebraically superimposed on the basic instruction value to generate a target frequency instruction value containing an adjustment amount change.

[0049] Based on the liquid level deviation value, a frequency compensation value is calculated by the single-loop PID controller.

[0050] Specifically, the liquid level deviation value detected in real time is input into the single-loop PID controller, so that the single-loop PID controller dynamically calculates the liquid level deviation value based on a proportional-integral-derivative algorithm and outputs a frequency compensation value for correcting the liquid level fluctuation.

[0051] The sum of the target frequency instruction value and the frequency compensation value is taken as a final frequency converter output frequency instruction value, which is output to a frequency converter execution unit of the frequency conversion drainage pump to perform closed-loop control on the liquid level of the drainage tank.

[0052] The frequency compensation value is a frequency dynamic correction value calculated by the single-loop PID controller according to the liquid level deviation. The final frequency converter output frequency instruction value is the sum of the target frequency instruction value and the frequency compensation value, which is taken as the actual frequency instruction output to the frequency converter. The frequency converter execution unit is a power module in the frequency converter that receives the frequency instruction and drives the motor speed.

[0053] Specifically, the target frequency instruction value and the frequency compensation value are arithmetically added to generate a final frequency converter output frequency instruction value, which is transmitted to the frequency converter execution unit of the frequency conversion drainage pump to adjust the pump speed through the frequency converter execution unit to achieve closed-loop control of the liquid level of the drainage tank, so that the actual liquid level is stabilized within the set value range.

[0054] In the above optional mode, the frequency converter output frequency adjustment amount and the frequency compensation value calculated by the PID controller are further superimposed to generate a final instruction value, which is used to perform closed-loop control on the liquid level and improve the precision and stability of the liquid level control, so as to ensure that the liquid level of the drainage system is within the set range.

[0055] In an optional mode, the step of controlling the opening degree of the pump outlet throttle valve by the corresponding actuator of the pump outlet throttle valve according to the opening degree adjustment amount comprises: The opening degree adjustment amount is superimposed on the current opening degree value of the pump outlet throttle to generate a target opening degree instruction value.

[0056] The current opening degree value refers to the actual opening degree position feedback value of the pump outlet throttle in the previous cycle. The target opening degree instruction value refers to a temporary opening degree set value generated by superimposing the current opening degree value and the opening degree adjustment amount.

[0057] Specifically, the current opening degree value of the pump outlet throttle is read in real time as a reference opening degree; the opening degree adjustment amount independently output by the fuzzy rule base is algebraically superimposed on the reference opening degree to generate a target opening degree instruction value containing adjustment changes.

[0058] It is determined whether the target opening degree instruction value exceeds a preset opening degree safety range to obtain a determination result.

[0059] The preset opening degree safety range refers to the minimum opening degree to the maximum opening degree interval allowed by the pump outlet throttle, and the lower limit is used to prevent throttling cavitation.

[0060] Specifically, the target opening degree instruction value is compared with the preset opening degree safety range; the lower limit value of the safety range is 10% to avoid throttling cavitation, and the upper limit value is 90% to prevent excessive flow; if the target opening degree instruction value is within the interval of 10% to 90%, it is determined that it is not over-limit, otherwise it is determined to be over-limit.

[0061] When the determination result is no, the target opening degree instruction value is directly output to the actuator to drive the pump outlet throttle to adjust to the physical opening degree position corresponding to the target opening degree instruction value.

[0062] Specifically, when the determination result is not over-limit, the target opening degree instruction value is directly transmitted to the actuator corresponding to the pump outlet throttle; the actuator converts the electrical signal into mechanical displacement to drive the pump outlet throttle to move to the physical opening degree position corresponding to the target opening degree instruction value.

[0063] When the determination result is yes, the boundary value of the preset opening degree safety range is taken as a corrected opening degree instruction value and output to the actuator to drive the pump outlet throttle to adjust to the physical opening degree position corresponding to the corrected opening degree instruction value.

[0064] The corrected opening degree instruction value refers to the safety range boundary value when the target opening degree instruction value exceeds the safety range. The physical opening degree position refers to the actual mechanical opening and closing angle or displacement of the pump outlet throttle after the actuator is driven.

[0065] Specifically, when the judgment result is over-limit, the boundary value of the preset opening degree safety range is selected as the corrected opening degree command value; if the target opening degree command value is less than 10%, 10% is used as the corrected opening degree command value, and if the target opening degree command value is greater than 90%, 90% is used as the corrected opening degree command value; the corrected opening degree command value is transmitted to the actuator to drive the pump outlet damper to move to the physical opening degree position corresponding to the corrected value.

[0066] In the above optional mode, the target opening degree command value is further generated according to the opening degree adjustment amount, the pump outlet damper opening degree is judged and adjusted, the opening degree range is constrained, and the variable frequency drainage pump is maintained in economic operation, the safety of the equipment is ensured, and the energy saving effect is achieved, and problems caused by excessive or insufficient opening degree are avoided.

[0067] In an optional mode, when the frequency converter output frequency reaches a preset upper frequency threshold and lasts for a first preset time length, the step of increasing the opening degree value of the pump outlet damper by a specified step and triggering a variable frequency output upper limit alarm, comprising: The frequency converter output frequency of the variable frequency drainage pump is continuously monitored, and when it is detected that the frequency converter output frequency is greater than or equal to the preset upper frequency threshold, a timer is started.

[0068] Among them, the timer refers to a counter module for accumulating the duration of the frequency converter output frequency over-limit.

[0069] If the timer reaches the first preset time length, the current opening degree value of the pump outlet damper is increased by the specified step, a first updated opening degree command value is generated and output to the actuator, so that the actuator drives the pump outlet damper to adjust to the physical opening degree position corresponding to the first updated opening degree command value.

[0070] Among them, the first preset time length is set to 30s by default, the specified step is 2% opening degree value, and the preset upper frequency threshold is 45Hz by default, which can also be adjusted according to actual conditions, and is not limited here.

[0071] Synchronously send a variable frequency output frequency upper limit alarm signal to a target terminal.

[0072] Among them, the target terminal refers to a monitoring device that receives the alarm signal, including a DCS system operation station or a field sound and light alarm.

[0073] Specifically, while generating the first updated opening degree command value, a variable frequency output frequency upper limit alarm signal is automatically sent to the target terminal, which contains the over-limit frequency value of the frequency converter and the occurrence time information.

[0074] When the frequency converter output frequency reaches a preset lower frequency threshold and lasts for a second preset time length, the step of decreasing the opening degree value of the pump outlet damper by the specified step and triggering a variable frequency output lower limit alarm, comprising: continuously monitoring the frequency output of the frequency conversion pump, and starting a timer when detecting that the frequency output of the frequency converter is less than or equal to a preset lower frequency threshold.

[0075] In the preset lower frequency threshold, the default is 28Hz, and it can also be adjusted according to the actual situation, which is not limited here.

[0076] If the timer reaches the second preset time length, the current opening value of the pump outlet damper is reduced by a specified step, a second updated opening instruction value is generated and output to the actuator, so that the actuator drives the pump outlet damper to adjust to the physical opening position corresponding to the second updated opening instruction value.

[0077] Synchronously send the frequency output lower limit alarm signal to the target terminal.

[0078] The frequency output lower limit alarm signal refers to the digital or analog alarm signal sent to the monitoring system when the frequency output lower limit alarm is triggered.

[0079] Specifically, while generating the second updated opening instruction value, the frequency output lower limit alarm signal is automatically sent to the target terminal, which contains the frequency converter over-limit frequency value and the occurrence time information.

[0080] It should be noted that, Figure 2 The flowchart is a double-device cooperative control logic flowchart, and the core goal of the flowchart is to realize the cooperative control of the frequency conversion pump and the damper, to give priority to the energy-saving advantage of the frequency conversion under the premise of ensuring the stability of the liquid level, and to automatically switch the protection mechanism under the extreme working condition of the device.

[0081] In the above optional mode, the frequency output of the frequency converter is further monitored, and when the over-limit is continuous, the opening of the pump outlet damper is adjusted and an alarm is given, the valve opening is dynamically adjusted to share the flow load, the safety and economic efficiency of the device are balanced, and the operator is reminded to take measures in time.

[0082] In an optional mode, it further comprises: In response to the automatic control instruction of the frequency conversion pump, the liquid level of the pump is closed-loop controlled by the single-loop PID controller according to the frequency output of the frequency converter, while keeping the pump outlet damper in a manual control state.

[0083] The frequency conversion pump automatic control instruction refers to a control signal that only puts the frequency conversion pump into automatic operation and keeps the pump outlet damper in a manual state.

[0084] Specifically, the system receives the automatic control command for the variable frequency condensate pump and activates the automatic control mode of the variable frequency condensate pump; it acquires the frequency adjustment amount of the inverter output independently output by the fuzzy rule base in real time; it inputs the frequency adjustment amount of the inverter output into the single-loop PID controller to perform closed-loop control of the liquid level of the condensate tank; and at the same time, it locks the pump outlet regulating valve control loop in the manual operation state to maintain its opening unchanged.

[0085] In response to the automatic control command of the pump outlet regulating valve, the opening of the pump outlet regulating valve is controlled by the actuator according to the opening adjustment amount to dynamically constrain the opening range, while keeping the variable frequency condensate pump in manual control mode.

[0086] Among them, the automatic control command for the pump outlet regulating valve refers to the control signal that only activates the automatic operation of the pump outlet regulating valve and keeps the variable frequency condensate pump in manual mode.

[0087] Specifically, the system receives the automatic control command for the pump outlet valve and activates the automatic control mode of the pump outlet valve; processes the real-time detected level deviation value of the condensate tank through a single-loop PID controller; dynamically calculates the frequency compensation value based on the proportional-integral-derivative algorithm; arithmetically superimposes the inverter output frequency adjustment amount and the frequency compensation value; generates the final inverter output frequency command value and outputs it to the inverter execution unit; and achieves closed-loop control of the condensate tank level by adjusting the pump speed.

[0088] It should be noted that when only the automatic control command for the pump outlet valve is received, the pump outlet valve actuator should be kept in manual control mode; automatic adjustment of the valve opening is prohibited, and the operator should manually set and maintain the physical opening position of the valve through an external interface.

[0089] In the above-mentioned optional methods, the variable frequency condensate pump and the pump outlet regulating valve can be independently and automatically controlled in response to different automatic control commands, while maintaining manual control of another device, providing a flexible control method to meet the liquid level control requirements of the condensate system under different working conditions.

[0090] Among the above optional methods, after triggering the inverter output upper limit alarm or the inverter output lower limit alarm, the following is also included: Continuously monitor whether the inverter output frequency returns to the preset high-efficiency frequency range. If within the third preset duration If no regression occurs, the specified step size will be dynamically adjusted. The amplitude of specifically satisfies the following expression: ;in, The updated step size value. For adaptive coefficients (value range 0.1–0.3), This refers to the output frequency of the real-time frequency converter. For the high efficiency frequency interval value, ; With Re-executes the opening value adjustment operation until the frequency returns to the high efficiency interval, and synchronously calculates the energy saving benefit index : ; wherein, The reference power before the frequency overrun, The adjusted real-time power, The adjustment starting time, and the energy saving benefit index Superimposed on the alarm signal for output.

[0091] In the above optional mode, further break through the traditional fixed step length limit, introduce frequency deviation proportion factor, realize step length amplitude adaptive amplification with working condition deterioration degree, accelerate system to return to high efficiency interval (such as 40-42Hz), solve the problem of insufficient adjustment efficiency of original scheme. Further, the energy saving rate is calculated by integral power difference, and the control effect is objectively verified by expression ( ) Form a "adjustment-evaluation" closed loop control.

[0092] Figure 3 An embodiment of a liquid level control device for a drainage system based on full-automatic decoupling fuzzy control is shown in the structural schematic diagram. As Figure 3 shown, the system 200 includes a deviation acquisition module 210, an adjustment generation module 220, a cooperative control module 230, and a dynamic adjustment module 240. The deviation acquisition module 210 is configured to detect the liquid level deviation value of the drainage tank in the drainage system and the variable frequency instruction feedback deviation value of the variable frequency drainage pump in the drainage system in real time. The adjustment generation module 220 is configured to input the liquid level deviation value and the variable frequency instruction feedback deviation value into a preset fuzzy rule base, and independently output the frequency converter output frequency adjustment amount of the variable frequency drainage pump and the opening adjustment amount of the pump outlet damper. The cooperative control module 230 is configured to respond to a double-device cooperative automatic control instruction, perform closed-loop control on the liquid level of the drainage tank through a single-loop PID controller according to the frequency converter output frequency adjustment amount, and control the opening of the pump outlet damper through the corresponding actuator of the pump outlet damper according to the opening adjustment amount, so as to dynamically constrain the opening range and maintain the economic operation of the variable frequency drainage pump. The dynamic adjustment module 240 is configured to: when the frequency converter output frequency reaches a preset upper frequency threshold and lasts for a first preset time length, increase the opening value of the pump outlet damper by a specified step and trigger a variable frequency output upper limit alarm; and when the frequency converter output frequency reaches a preset lower frequency threshold and lasts for a second preset time length, decrease the opening value of the pump outlet damper by the specified step and trigger a variable frequency output lower limit alarm.

[0093] In an optional manner, the deviation collection module 210 is specifically configured to: collect real-time liquid level data of the drain tank through a pressure transmitter, and determine a difference between the real-time liquid level data and a preset liquid level set value of the drain tank as the liquid level deviation value; collect an actual output frequency value through a frequency converter feedback interface of the variable frequency drain pump, and determine a difference between the actual output frequency value and a frequency converter output frequency instruction value of the variable frequency drain pump as the variable frequency instruction feedback deviation value.

[0094] In an optional manner, the adjustment generation module 220 is specifically configured to: quantize the liquid level deviation value into discrete liquid level fuzzy levels, and quantize the variable frequency instruction feedback deviation value into discrete variable frequency fuzzy levels; match a target cooperative control strategy corresponding to the liquid level fuzzy levels and the variable frequency fuzzy levels according to a preset artificial experience mapping relationship in the fuzzy rule base; convert the target cooperative control strategy into the variable frequency converter output frequency adjustment amount and the opening adjustment amount and independently output.

[0095] In an optional manner, the cooperative control module 230 is specifically configured to: superimpose the variable frequency converter output frequency adjustment amount on a current variable frequency converter output frequency instruction value of the variable frequency drain pump to generate a target frequency instruction value; calculate a frequency compensation value based on the liquid level deviation value through the single-loop PID controller; take a sum of the target frequency instruction value and the frequency compensation value as a final variable frequency converter output frequency instruction value, and output the final variable frequency converter output frequency instruction value to a frequency converter execution unit of the variable frequency drain pump to perform closed-loop control on the liquid level of the drain tank.

[0096] In an optional manner, the cooperative control module 230 is specifically configured to: superimpose the opening adjustment amount on a current opening value of the pump outlet damper to generate a target opening instruction value; determine whether the target opening instruction value exceeds a preset opening safety range to obtain a determination result; When the judgment result is no, the target opening degree instruction value is directly output to the actuator to drive the pump outlet damper to adjust to the physical opening degree position corresponding to the target opening degree instruction value; When the judgment result is yes, the boundary value of the preset opening degree safety range is taken as a corrected opening degree instruction value and output to the actuator to drive the pump outlet damper to adjust to the physical opening degree position corresponding to the corrected opening degree instruction value.

[0097] In an optional manner, the dynamic adjustment module 240 is specifically configured to: When the frequency converter output frequency reaches the preset upper frequency threshold and lasts for a first preset time length, the opening degree value of the pump outlet damper is increased by a specified step, and a frequency converter output upper limit alarm is triggered, including: The frequency converter output frequency of the frequency conversion drain pump is continuously monitored, and when it is detected that the frequency converter output frequency is greater than or equal to the preset upper frequency threshold, a timer is started; If the timer reaches the first preset time length, the current opening degree value of the pump outlet damper is increased by the specified step, a first updated opening degree instruction value is generated and output to the actuator, so that the pump outlet damper is driven by the actuator to adjust to the physical opening degree position corresponding to the first updated opening degree instruction value; A frequency conversion output upper limit alarm signal is synchronously sent to the target terminal; The frequency converter output frequency of the frequency conversion drain pump is continuously monitored, and when it is detected that the frequency converter output frequency is less than or equal to the preset lower frequency threshold, a timer is started; If the timer reaches the second preset time length, the current opening degree value of the pump outlet damper is reduced by the specified step, a second updated opening degree instruction value is generated and output to the actuator, so that the pump outlet damper is driven by the actuator to adjust to the physical opening degree position corresponding to the second updated opening degree instruction value; A frequency conversion output lower limit alarm signal is synchronously sent to the target terminal.

[0098] In an optional manner, further comprising: an independent control module; the independent control module is configured to: In response to a frequency conversion drain pump automatic control instruction, the liquid level of the drain tank is controlled in a closed loop by the single-loop PID controller according to the frequency converter output frequency adjustment amount, while the pump outlet damper is kept in a manual control state; In response to a pump outlet damper automatic control instruction, the opening degree of the pump outlet damper is controlled by the actuator according to the opening degree adjustment amount to dynamically constrain the opening degree range, while the frequency conversion drain pump is kept in a manual control state.

[0099] It should be noted that the beneficial effects of the drainage system liquid level control device 200 based on full-automatic decoupling fuzzy control provided by the above embodiment are the same as those of the drainage system liquid level control method based on full-automatic decoupling fuzzy control, and will not be repeated here. In addition, when the device provided by the above embodiment implements its function, only the division of the above functional modules is exemplified, and in actual application, the above functional distribution can be completed by different functional modules according to the needs, that is, the system is divided into different functional modules according to the actual situation to complete all or part of the above described functions. In addition, the system and method embodiments provided by the above embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0100] Among them, the drainage system liquid level control device 200 based on full-automatic decoupling fuzzy control of the application can be a computer program (including program code) running in a computer device, for example, the drainage system liquid level control device 200 based on full-automatic decoupling fuzzy control of the application is an application software, which can be used to execute the corresponding steps in the drainage system liquid level control method based on full-automatic decoupling fuzzy control of the application.

[0101] In some embodiments, the drainage system liquid level control device 200 based on full-automatic decoupling fuzzy control of the application can be realized in a combination of software and hardware, for example, the drainage system liquid level control device 200 based on full-automatic decoupling fuzzy control of the application can be a processor in the form of a hardware decoding processor, which is programmed to execute the drainage system liquid level control method based on full-automatic decoupling fuzzy control of the application. For example, the processor in the form of a hardware decoding processor can use one or more application-specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field-programmable gate arrays (FPGAs), or other electronic components.

[0102] Among them, the modules involved in the embodiments of the application can be realized by software or hardware. Among them, the name of the module does not constitute a limitation of the module itself in some cases.

[0103] The electronic device of the embodiment of the present application comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements any of the above-mentioned liquid level control methods of a drainage system based on full-automatic decoupling fuzzy control when executing the computer program, that is, the electronic device of the embodiment of the present application can comprise but is not limited to a processor and a memory; the memory is used for storing a computer program; and the processor is used for executing the liquid level control method of a drainage system based on full-automatic decoupling fuzzy control shown in any of the embodiments of the present application by calling the computer program.

[0104] In an optional embodiment, an electronic device is provided, as shown in Figure 4 Figure 4 The electronic device 4000 shown in the optional embodiment comprises a processor 4001 and a memory 4003. The processor 4001 and the memory 4003 are connected, for example, through a bus 4002. Optionally, the electronic device 4000 can further comprise a transceiver 4004, which can be used for data interaction, such as data sending and / or data receiving, between the electronic device and other electronic devices. It should be noted that the transceiver 4004 is not limited to one in actual application, and the structure of the electronic device 4000 does not constitute a limitation on the embodiments of the present application.

[0105] The processor 4001 can be a CPU (Central Processing Unit, central processor), a general-purpose processor, a DSP (Digital Signal Processor, data signal processor), an ASIC (Application Specific Integrated Circuit, application specific integrated circuit), an FPGA (Field Programmable Gate Array, field programmable gate array) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in combination with the disclosure. The processor 4001 can also be a combination of computing functions, such as one or more microprocessor combinations, combinations of DSP and microprocessor, etc.

[0106] The bus 4002 can comprise a channel for transmitting information between the above-mentioned components. The bus 4002 can be a PCI (Peripheral Component Interconnect, peripheral component interconnect) bus or an EISA (Extended Industry Standard Architecture, extended industry standard architecture) bus, etc. The bus 4002 can be divided into an address bus, a data bus, a control bus, etc. For the convenience of representation, Figure 4 ​Only one bus 4002 is shown, but it could be comprised of several buses. Bus 4002 is used to transmit and receive electrical signals among the various components of the computer 4000.

[0107] The memory 4003 can be a ROM (Read Only Memory) or other type of static storage device that can store static information and instructions, a RAM (Random Access Memory) or other type of dynamic storage device that can store information and instructions, an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical disk storage, a magnetic disk storage or other magnetic storage devices, or any other medium capable of storing desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.

[0108] The memory 4003 is used to store the application program code (computer program) for implementing the scheme of the present application, and is controlled by the processor 4001 to execute. The processor 4001 is used to execute the application program code stored in the memory 4003 to realize the content shown in the foregoing method embodiments.

[0109] The electronic device can also be a terminal device, which can be any terminal device that can install an application and access a webpage through the application, including at least one of a smartphone, a tablet computer, a notebook computer, a desktop computer, a smart speaker, a smart watch, a smart television, and a smart vehicle device.

[0110] It should be noted that, Figure 4 The electronic device shown is only an example and should not limit the functions and use range of the embodiments of the present application.

[0111] The computer readable storage medium of the embodiments of the present application, the computer readable storage medium has a computer program stored thereon, the computer program is executed by the processor to realize any one of the above-mentioned hydrophobic system liquid level control method based on full-automatic decoupling fuzzy control.

[0112] Optionally, the computer readable storage medium can be a Read-Only Memory (ROM), a Random Access Memory (RAM), a Compact Disc Read-Only Memory (CD-ROM), a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0113] In an exemplary embodiment, a computer program product or computer program is also provided, which includes computer instructions stored in a computer readable storage medium. A processor of an electronic device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions, so that the electronic device performs the above-mentioned liquid level control method for hydrophobic system based on full-automatic decoupling fuzzy control.

[0114] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0115] It should be understood that the flowchart and the block diagram in the figures illustrate the architecture, functionality, and operation of possible implementations of various embodiments of the present application. In this regard, each block in the flowchart or block diagram can represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions noted in the flowchart or block diagram can occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently or the blocks can sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagram and / or flowchart illustrations, and combinations thereof, can be implemented by a dedicated hardware-based system that performs the specified functions or operations, or combinations of hardware and software.

[0116] The computer readable storage medium provided by the embodiments of the present application can be, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or apparatus, or any combination of the above. More specific examples of the computer readable storage medium can include, but are not limited to, an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, the computer readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus or device.

[0117] The computer readable storage medium described above carries one or more programs, which, when executed by the electronic device, cause the electronic device to perform the method shown in the above embodiments.

[0118] The above description is merely the preferred embodiments of the present application and the explanation of the technical principles used. It should be understood by those skilled in the art that the disclosed scope of the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by any combinations of the above technical features or their equivalent features without departing from the disclosed concept. For example, the technical solutions formed by the mutual replacement of the above features and the technical features disclosed in the present application (but not limited to) with similar functions.

[0119] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and represent no specific order or chronological order. The order of use of similar objects can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described.

[0120] Those skilled in the art know that the present application can be implemented as a system, a method or a computer program product, so the present application can be specifically implemented as follows: it can be a complete hardware, a complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software, which is generally referred to as "circuit", "module" or "system" in this paper. In addition, in some embodiments, the present application can also be implemented as a computer program product in one or more computer readable media, which contains computer readable program code.

[0121] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that changes, modifications, substitutions and variations can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. A method for controlling the liquid level of a hydrophobic system based on fully automatic decoupled fuzzy control, characterized in that, include: Real-time detection of the liquid level deviation value of the hydrophobic tank in the hydrophobic system and the frequency conversion command feedback deviation value of the frequency conversion pump in the hydrophobic system; The liquid level deviation value and the frequency conversion command feedback deviation value are input into a preset fuzzy rule library, and the frequency conversion output frequency adjustment amount and the pump outlet valve opening adjustment amount of the frequency conversion condensate pump are output independently. In response to the dual-device collaborative automatic control command, the liquid level of the condensate tank is controlled in a closed loop by a single-loop PID controller according to the frequency adjustment amount of the inverter output. The opening of the pump outlet valve is controlled by the actuator corresponding to the pump outlet valve according to the opening adjustment amount, so as to dynamically constrain the opening range and maintain the economical operation of the variable frequency condensate pump. When the inverter output frequency reaches the preset upper frequency threshold and remains so for a first preset duration, the opening value of the pump outlet regulating valve is increased by a specified step size, and an inverter output upper limit alarm is triggered; when the inverter output frequency reaches the preset lower frequency threshold and remains so for a second preset duration, the opening value of the pump outlet regulating valve is decreased by the specified step size, and an inverter output lower limit alarm is triggered.

2. The hydrophobic system level control method based on fully automatic decoupled fuzzy control according to claim 1, characterized in that, The steps for real-time detection of the liquid level deviation value of the hydrophobic tank in the hydrophobic system and the frequency conversion command feedback deviation value of the frequency conversion pump in the hydrophobic system include: The real-time liquid level data of the condensate tank is collected by a pressure transmitter, and the difference between the real-time liquid level data and the preset liquid level setting value of the condensate tank is determined as the liquid level deviation value. The actual output frequency value is acquired through the inverter feedback interface of the variable frequency condensate pump, and the difference between the actual output frequency value and the inverter output frequency command value of the variable frequency condensate pump is determined as the frequency conversion command feedback deviation value.

3. The hydrophobic system level control method based on fully automatic decoupled fuzzy control according to claim 1, characterized in that, The steps of inputting the liquid level deviation value and the frequency conversion command feedback deviation value into a preset fuzzy rule base, and independently outputting the frequency conversion output frequency adjustment of the frequency converter and the opening adjustment of the pump outlet damper of the frequency conversion condensate pump, include: The liquid level deviation value is quantized into a discrete liquid level fuzzy level, and the frequency conversion command feedback deviation value is quantized into a discrete frequency conversion fuzzy level; Based on the preset human experience mapping relationship in the fuzzy rule base, a target collaborative control strategy corresponding to the liquid level fuzziness level and the frequency conversion fuzziness level is matched; The target collaborative control strategy is converted into the inverter output frequency adjustment amount and the opening degree adjustment amount, and output independently.

4. The hydrophobic system level control method based on fully automatic decoupled fuzzy control according to claim 1, characterized in that, The steps of performing closed-loop control of the liquid level in the hydrophobic tank using a single-loop PID controller based on the frequency adjustment of the inverter output include: The frequency adjustment value of the inverter output is superimposed on the current frequency command value of the inverter output of the variable frequency condensate pump to generate the target frequency command value. Based on the liquid level deviation value, the frequency compensation value is calculated by the single-loop PID controller. The sum of the target frequency command value and the frequency compensation value is used as the final inverter output frequency command value, and output to the inverter execution unit of the variable frequency condensate pump to perform closed-loop control of the liquid level in the condensate tank.

5. The hydrophobic system level control method based on fully automatic decoupled fuzzy control according to claim 4, characterized in that, The step of controlling the opening of the pump outlet regulating valve through the actuator corresponding to the pump outlet regulating valve according to the opening adjustment amount includes: The opening adjustment amount is superimposed on the current opening value of the pump outlet valve to generate the target opening command value; Determine whether the target opening command value exceeds the preset opening safety range, and obtain the determination result; When the judgment result is negative, the target opening command value is directly output to the actuator, so that the actuator can drive the pump outlet regulating valve to adjust to the physical opening position corresponding to the target opening command value; When the judgment result is yes, the boundary value of the preset opening safety range is used as the correction opening command value and output to the actuator, so as to drive the pump outlet regulating valve to adjust to the physical opening position corresponding to the correction opening command value through the actuator.

6. The hydrophobic system level control method based on fully automatic decoupled fuzzy control according to claim 1, characterized in that, When the inverter output frequency reaches a preset upper frequency threshold and remains there for a first preset duration, the step of increasing the opening value of the pump outlet regulating valve by a specified step size and triggering the inverter output upper limit alarm includes: The inverter output frequency of the variable frequency condensate pump is continuously monitored, and a timer is started when the inverter output frequency is detected to be greater than or equal to the preset upper limit threshold. If the timer reaches the first preset duration, the current opening value of the pump outlet valve is increased by the specified step size to generate a first update opening command value and output to the actuator, so as to drive the pump outlet valve to adjust to the physical opening position corresponding to the first update opening command value through the actuator. Simultaneously send an alarm signal for the upper limit of the inverter output frequency to the target terminal; When the inverter output frequency reaches a preset lower frequency threshold and remains there for a second preset duration, the step of decreasing the opening value of the pump outlet regulating valve by the specified step size and triggering the inverter output lower limit alarm includes: The inverter output frequency of the variable frequency condensate pump is continuously monitored, and a timer is started when the inverter output frequency is detected to be less than or equal to a preset lower frequency threshold. If the timer reaches the second preset duration, the current opening value of the pump outlet valve is subtracted by a specified step size to generate a second update opening command value and output to the actuator, so as to drive the pump outlet valve to adjust to the physical opening position corresponding to the second update opening command value through the actuator. Simultaneously send a frequency converter output frequency lower limit alarm signal to the target terminal.

7. The hydrophobic system level control method based on fully automatic decoupled fuzzy control according to any one of claims 1 to 6, characterized in that, Also includes: In response to the automatic control command of the variable frequency condensate pump, the liquid level of the condensate tank is controlled in a closed loop by the single-loop PID controller according to the frequency adjustment amount of the inverter output, while keeping the pump outlet regulating valve in a manual control state. In response to the automatic control command of the pump outlet regulating valve, the opening of the pump outlet regulating valve is controlled by the actuator according to the opening adjustment amount to dynamically constrain the opening range, while keeping the variable frequency condensate pump in manual control mode.

8. A hydrophobic system level control device based on fully automatic decoupled fuzzy control, characterized in that, include: Deviation acquisition module, adjustment generation module, collaborative control module, and dynamic adjustment module; The deviation acquisition module is used to: detect the liquid level deviation value of the hydrophobic tank in the hydrophobic system and the frequency conversion command feedback deviation value of the frequency conversion pump in the hydrophobic system in real time. The adjustment generation module is used to: input the liquid level deviation value and the frequency conversion command feedback deviation value into a preset fuzzy rule library, and independently output the frequency conversion output frequency adjustment amount of the frequency converter of the frequency conversion condensate pump and the opening adjustment amount of the pump outlet regulating valve. The collaborative control module is used to: respond to the dual-device collaborative automatic control command, and according to the frequency adjustment amount output by the inverter, perform closed-loop control of the liquid level of the condensate tank through a single-loop PID controller, and according to the opening adjustment amount, control the opening of the pump outlet valve through the actuator corresponding to the pump outlet valve, so as to dynamically constrain the opening range and maintain the economical operation of the variable frequency condensate pump. The dynamic adjustment module is used to: when the inverter output frequency reaches the preset upper frequency threshold and continues for a first preset duration, increase the opening value of the pump outlet regulating valve by a specified step size and trigger the inverter output upper limit alarm; when the inverter output frequency reaches the preset lower frequency threshold and continues for a second preset duration, decrease the opening value of the pump outlet regulating valve by the specified step size and trigger the inverter output lower limit alarm.

9. An electronic device, characterized in that, The electronic device includes a processor coupled to a memory, the memory storing at least one computer program, which is loaded and executed by the processor to enable the electronic device to implement the hydrophobic system level control method based on fully automatic decoupled fuzzy control as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one computer program, which is loaded and executed by a processor to enable the computer-readable storage medium to implement the hydrophobic system level control method based on fully automatic decoupled fuzzy control as described in any one of claims 1 to 7.

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