CN-121976962-A - Four-stage compressor cooperative control method, device, terminal and storage medium

CN121976962ACN 121976962 ACN121976962 ACN 121976962ACN-121976962-A

Abstract

The application provides a four-stage compressor cooperative control method, a device, a terminal and a storage medium, and relates to the technical field of automatic control of compressors. The method comprises the steps of collecting key parameters of a to-be-regulated four-stage compressor in a first operation period, wherein the key parameters comprise inlet and outlet operation data of each stage, control quantity feedback parameters, load demand parameters and surge characteristic quantity parameters, inputting the key parameters into a constructed four-stage compressor physical field coupling prediction model to obtain a predicted control quantity of a second operation period, wherein the predicted control quantity comprises opening degree and rotating speed of each stage of guide vanes in the to-be-regulated four-stage compressor, the second operation period is the next operation period adjacent to the first operation period, and controlling the to-be-regulated four-stage compressor to operate by using the predicted control quantity of the second operation period. The application can avoid the limitation possibly brought by single parameter control, ensure that the compressor can keep the optimal running state under various working conditions, and reduce the system fluctuation and the fault risk caused by parameter mismatch.

Inventors

WANG HONG
ZHI XUDONG
Lou Peibin
ZHANG XUEZHI
Niu Shutan

Assignees

河北金士顿科技有限责任公司

Dates

Publication Date: 20260505
Application Date: 20260209

Claims (10)

1. A four-stage compressor cooperative control method, characterized by comprising: Collecting key parameters of a to-be-regulated four-stage compressor in a first operation period, wherein the key parameters comprise inlet and outlet operation data of each stage, control quantity feedback parameters, load demand parameters and surge characteristic quantity parameters; Inputting the key parameters into a constructed four-stage compressor physical field coupling prediction model to obtain a prediction control quantity of a second operation period, wherein the prediction control quantity comprises the opening degree and the rotating speed of each stage of guide vanes in the four-stage compressor to be regulated and controlled, and the second operation period is the next operation period adjacent to the first operation period; and controlling the operation of the four-stage compressor to be regulated by using the predicted control quantity of the second operation period.
2. The four-stage compressor cooperative control method according to claim 1, wherein the four-stage compressor physical field coupling prediction model comprises a thermodynamic sub-model, an energy efficiency sub-model, a dynamic surge sub-model and a dynamic prediction sub-model which are arranged in parallel, the four-stage compressor physical field coupling prediction model is optimized by adjusting and minimizing energy efficiency, load tracking quantity and control quantity, and an objective function of the four-stage compressor physical field coupling prediction model is as follows: Wherein, the For the value of the objective function, As a function of the minimum value of the function, 、、、 Are all the dynamic weight coefficients of the dynamic weight coefficients, For optimal efficiency of the energy efficiency model output, For the actual operating efficiency of the four-stage compressor, For the flow set point in the load demand parameter, For the actual output flow of the four stage compressor, For the adjustment of the opening degree of each stage of guide vanes in the four-stage compressor, Is the adjustment quantity of the motor rotation speed in the four-stage compressor.
3. The four-stage compressor cooperative control method according to claim 2, wherein the four-stage compressor physical field coupling prediction model is constructed under the constraint conditions of surge constraint, physical constraint and inter-stage matching constraint; the surge constraint is: Wherein, the For the actual pressure rise coefficient during operation of the four stage compressor, The pressure rise coefficient corresponding to the dynamic surge boundary; the physical constraints are: Wherein, the For the opening degree of each stage of guide vanes in the four-stage compressor, Is the minimum value of the opening degree of the guide vane, Is the maximum value of the opening degree of the guide vane, For the motor speed in the four-stage compressor, For the lowest rotational speed allowed by the motor in the four-stage compressor, A maximum allowable rotation speed for a motor in the four-stage compressor; The inter-stage matching constraint is: Wherein, the Is the fourth stage compressor The inlet pressure of the stage is set to be, Is the fourth stage compressor The inlet pressure of the stage is set to be, Is the maximum pressure ratio allowed between the stages.
4. The four-stage compressor cooperative control method according to claim 1, wherein the inputting the key parameter into the constructed four-stage compressor physical field coupling prediction model to obtain the predicted control amount of the second operation period includes: inputting the key parameters into a constructed four-stage compressor physical field coupling prediction model, and solving a quadratic programming problem of the four-stage compressor physical field coupling prediction model by adopting an interior point method to obtain the prediction control quantity of the second operation period.
5. The four-stage compressor cooperative control method according to claim 1, wherein the controlling the four-stage compressor operation to be regulated using the predicted control amount of the second operation period includes: and sending the predicted control quantity of the second operation period to a guide vane actuator and a motor speed regulating unit of the four-stage compressor to be regulated in a control instruction mode through a prediction model control system, and controlling the guide vane actuator and the motor speed regulating unit to operate according to the predicted control quantity of the second operation period.
6. The four-stage compressor cooperative control method according to claim 1, wherein after the control of the four-stage compressor to be controlled using the predicted control amount of the second operation period, the method further comprises: Collecting target surge characteristic quantity parameters of the four-stage compressor to be regulated after the second operation period is completed, wherein the target surge characteristic quantity parameters comprise a target flow coefficient and a target pressure rise coefficient; if the target flow coefficient is smaller than or equal to a surge early warning threshold value of the flow coefficient, or the target pressure rise coefficient is larger than or equal to a first percentage of the pressure rise coefficient corresponding to the dynamic surge boundary, triggering an emergency anti-surge mode, wherein the value range of the first percentage is smaller than 1; If the target flow coefficient is larger than the surge early warning threshold value of the flow coefficient and the target pressure rise coefficient is smaller than the first percentage of the pressure rise coefficient corresponding to the dynamic surge boundary, updating the key parameters of the four-stage compressor to be regulated in the first operation period by using the key parameters of the four-stage compressor to be regulated in the second operation period, and returning the key parameters to be input into the constructed four-stage compressor physical field coupling prediction model to obtain the predicted control quantity of the second operation period.
7. The four-stage compressor cooperative control method of claim 6, wherein said triggering an emergency anti-surge mode comprises: And dynamically adjusting the opening increase of each stage of guide vanes and the motor rotation speed decrease of the four-stage compressor to be regulated according to the regulation priority level until the updated target flow coefficient is greater than or equal to N times of a surge early warning threshold value of the flow coefficient, wherein N is a real number greater than 1.
8. A four-stage compressor cooperative control apparatus, comprising: The system comprises a parameter acquisition module, a control quantity feedback module and a surge characteristic quantity module, wherein the parameter acquisition module is used for acquiring key parameters of a to-be-regulated four-stage compressor in a first operation period, and the key parameters comprise inlet and outlet operation data of each stage, a control quantity feedback parameter, a load demand parameter and a surge characteristic quantity parameter; The control quantity output module is used for inputting the key parameters into the constructed four-stage compressor physical field coupling prediction model to obtain a prediction control quantity of a second operation period, wherein the prediction control quantity comprises the opening degree and the rotating speed of each stage of guide vanes in the four-stage compressor to be regulated and controlled, and the second operation period is the next operation period adjacent to the first operation period; and the control module is used for controlling the operation of the four-stage compressor to be regulated and controlled by utilizing the predicted control quantity of the second operation period.
9. A terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the four-stage compressor cooperative control method according to any of the preceding claims 1 to 7 when the computer program is executed.
10. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the four-stage compressor cooperative control method according to any one of the preceding claims 1 to 7.

Description

Four-stage compressor cooperative control method, device, terminal and storage medium Technical Field The application relates to the technical field of automatic control of compressors, in particular to a four-stage compressor cooperative control method, a device, a terminal and a storage medium. Background The four-stage compressor is used as key core equipment for industrial fluid transportation, and is widely applied to various fields of chemical industry, energy sources and the like by virtue of the remarkable advantage of high compression ratio. However, under the current prior art condition, when the guide vanes or the rotating speed of each stage of the four-stage compressor are independently adjusted, the coupling relation existing between each stage is not fully considered, so that the pressure matching imbalance of each stage is very easy to be caused, and the bad condition of overpressure or underpressure occurs. When the load is suddenly changed, the control strategy with fixed parameters is difficult to realize quick response, so that the fluctuation amplitude of the working point is overlarge, the surge phenomenon is possibly triggered, and the high-efficiency operation area is difficult to quickly return. In addition, the use of a fixed surge margin is prone to initiate surge risk because the dynamic effects of gas composition and changes in intake conditions on the surge line are not considered. Disclosure of Invention The application provides a four-stage compressor cooperative control method, a device, a terminal and a storage medium, which are used for solving the problems that in the prior art, the four-stage compressor does not consider the coupling relation between each stage, so that the pressure matching of each stage is unbalanced, and when the load is suddenly changed and the gas condition is not considered, the surge phenomenon is easy to occur. In a first aspect, the present application provides a four-stage compressor cooperative control method, including: Collecting key parameters of a to-be-regulated four-stage compressor in a first operation period, wherein the key parameters comprise inlet and outlet operation data of each stage, control quantity feedback parameters, load demand parameters and surge characteristic quantity parameters; Inputting the key parameters into a constructed four-stage compressor physical field coupling prediction model to obtain a prediction control quantity of a second operation period, wherein the prediction control quantity comprises the opening degree and the rotating speed of each stage of guide vanes in the four-stage compressor to be regulated and controlled, and the second operation period is the next operation period adjacent to the first operation period; and controlling the operation of the four-stage compressor to be regulated by using the predicted control quantity of the second operation period. In a second aspect, the present application provides a four-stage compressor cooperative control apparatus, comprising: The system comprises a parameter acquisition module, a control quantity feedback module and a surge characteristic quantity module, wherein the parameter acquisition module is used for acquiring key parameters of a to-be-regulated four-stage compressor in a first operation period, and the key parameters comprise inlet and outlet operation data of each stage, a control quantity feedback parameter, a load demand parameter and a surge characteristic quantity parameter; The control quantity output module is used for inputting the key parameters into the constructed four-stage compressor physical field coupling prediction model to obtain a prediction control quantity of a second operation period, wherein the prediction control quantity comprises the opening degree and the rotating speed of each stage of guide vanes in the four-stage compressor to be regulated and controlled, and the second operation period is the next operation period adjacent to the first operation period; and the control module is used for controlling the operation of the four-stage compressor to be regulated and controlled by utilizing the predicted control quantity of the second operation period. In a third aspect, the present application provides a terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method according to the first aspect or any one of the possible implementations of the first aspect when the computer program is executed. In a fourth aspect, the present application provides a computer readable storage medium storing a computer program which when executed by a processor implements the steps of the method of the first aspect or any one of the possible implementations of the first aspect. The application provides a four-stage compressor cooperative control method, a device, a terminal and a storage medium, which comprehensively consider vari