CN117850372B - Control logic optimization method and system for hydraulic control butterfly valve - Google Patents

Control logic optimization method and system for hydraulic control butterfly valve Download PDF

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Publication number
CN117850372B
CN117850372B CN202410050065.0A CN202410050065A CN117850372B CN 117850372 B CN117850372 B CN 117850372B CN 202410050065 A CN202410050065 A CN 202410050065A CN 117850372 B CN117850372 B CN 117850372B
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water pump
opening
butterfly valve
valve
current
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CN117850372A (en
Inventor
熊剑敏
杨春笋
黎赛梾
肖敦哲
张�成
肖俊超
程业武
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Guoneng Changyuan Jingmen Power Generation Co ltd
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Guoneng Changyuan Jingmen Power Generation Co ltd
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
    • G05B19/41845—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by system universality, reconfigurability, modularity
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/33—Director till display
    • G05B2219/33273—DCS distributed, decentralised controlsystem, multiprocessor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Water Turbines (AREA)

Abstract

The application relates to a control logic optimization method and a control logic optimization system for a hydraulic control butterfly valve, wherein the method comprises the steps of obtaining the water pump opening of each circulating water pump in a DCS control system and the water pump state corresponding to each water pump opening, adjusting the butterfly valve opening of a current hydraulic control butterfly valve in a linkage way according to the water pump opening and the water pump state, obtaining the circulating water flow direction under the butterfly valve opening, adjusting the water pump opening and closing sequence of the DCS control system in a feedback way according to the circulating water flow direction and the butterfly valve opening, synchronously adjusting the butterfly valve opening and closing sequence of each water pump associated butterfly valve according to the water pump opening and closing sequence, calculating the valve opening delay time between each water pump and the corresponding associated butterfly valve, and performing time sequence matching processing on the control logic of the current hydraulic control butterfly valve according to the opening and closing sequence of an adjacent water pump and the associated butterfly valve and the valve opening delay time sequence, so as to obtain a control logic optimization strategy related to the water pump and the butterfly valve time sequence. The application has the effect of improving the control intelligence of the hydraulic control butterfly valve.

Description

Control logic optimization method and system for hydraulic control butterfly valve
Technical Field
The invention relates to the technical field of hydraulic control butterfly valve control, in particular to a control logic optimization method and system for a hydraulic control butterfly valve.
Background
At present, along with the wide application of the hydraulic butterfly valve in the power plant and mine industry, especially when emergency occurs, the hydraulic butterfly valve can cut off the fluid pipeline fast, so as to protect the safe operation of related equipment, and whether the hydraulic butterfly valve can safely and stably operate directly influences the normal operation of the unit.
The control method of the existing hydraulic control butterfly valve generally comprises the following steps: the control of the hydraulic butterfly valve is realized through a PLC (programmable logic), the self control logic and the fault judgment logic of the hydraulic butterfly valve are respectively associated with the alarm judgment, the valve stopping logic and the like of the matched PLC, so that the hydraulic butterfly valve is controlled through the PLC, but with the higher requirements of a large-scale thermal power generating unit on intelligent control and centralized control, the out-of-control faults of the butterfly valve are easily caused by the old version of the original PLC and the instability of the PLC, if the hydraulic butterfly valve is abnormal to start and stop, the safety of the unit is greatly threatened, and in the actual use process, the control logic of the hydraulic butterfly valve is difficult to be modified by reading a control program from the PLC, so that the control logic of the hydraulic butterfly valve is required to be optimized, and the control intelligence of the hydraulic butterfly valve is improved.
Disclosure of Invention
In order to improve control intelligence of the hydraulic control butterfly valve, the application provides a control logic optimization method and a control logic optimization system for the hydraulic control butterfly valve.
In a first aspect, the above object of the present application is achieved by the following technical solutions:
A control logic optimization method for a hydraulically controlled butterfly valve, comprising:
Acquiring the water pump opening of each circulating water pump and the water pump state corresponding to each water pump opening in a DCS control system, and adjusting the butterfly valve opening of the current hydraulic butterfly valve in a linkage way according to the water pump opening and the water pump state;
acquiring a circulating water flow direction under the opening degree of the butterfly valve, and adjusting the water pump opening and closing sequence of a DCS control system according to the circulating water flow direction and the opening degree of the butterfly valve in a feedback manner;
Synchronously adjusting the opening and closing sequence of the butterfly valves of each water pump associated butterfly valve according to the opening and closing sequence of the water pumps, and calculating the valve opening delay time between each water pump and the corresponding associated butterfly valve;
and performing time sequence matching processing on control logic of the current hydraulic butterfly valve according to the opening and closing sequence between the adjacent water pumps and the associated butterfly valves and the valve opening delay time to obtain a control logic optimization strategy related to the time sequence of the water pumps and the butterfly valves.
Through adopting above-mentioned technical scheme, in the optimal control of hydraulically controlled butterfly valve, change local PLC control into DCS control, control logic optimization of water pump and butterfly valve can be carried out at any time through DCS control system, and combine water pump aperture and water pump state to carry out coordinated adjustment to corresponding associated butterfly valve, improve the coordinated control performance of butterfly valve, and can in time adjust the start-stop sequence of water pump through the feedback when the phenomenon of flowing backward appears, reduce the trouble influence of circulating water to the unit, open and close the continuity between water pump and the associated butterfly valve is guaranteed through the start-stop sequence and the valve delay time between adjacent water pump and the associated butterfly valve, improve the running stability of unit, through carrying out time sequence matching to the control logic of current hydraulically controlled butterfly valve, make the control logic between associated butterfly valve and the circulating water pump more orderly, reduce the work load of inspection personnel, simultaneously also can in time discover the trouble that probably exists between water pump and the associated butterfly valve, improve the control intelligence of hydraulically controlled butterfly valve.
The present application may be further configured in a preferred example to: the butterfly valve opening and closing sequence of each water pump associated butterfly valve is synchronously adjusted according to the water pump opening and closing sequence, and the valve opening delay time between each water pump and the corresponding associated butterfly valve is calculated, specifically comprising:
Acquiring the water pump starting time of a previous water pump reaching a preset water pump opening degree and the water flow change rate passing through the previous water pump, and constructing a hydraulic influence relation between the opening of the previous water pump and an associated butterfly valve;
synchronously adjusting the opening and closing sequence of the butterfly valve of each water pump associated butterfly valve according to the opening and closing sequence of the water pumps, and generating the opening and closing sequence of the butterfly valve of the water pump associated butterfly valve;
Constructing a butterfly valve control model for cooperatively controlling the opening and closing of the butterfly valves of the water pump according to the hydraulic influence relation and the opening and closing sequence of the butterfly valves of the water pump, and planning the control logic of each butterfly valve;
And inputting the opening degree and the state of the current water pump into the butterfly valve control model, calculating the valve opening delay time between the current water pump and the related butterfly valve, and outputting the butterfly valve control logic of the current related butterfly valve.
The present application may be further configured in a preferred example to: the calculating of the valve opening delay time between the current water pump and the associated butterfly valve specifically comprises the following steps:
Respectively acquiring the water pump opening quantity and the butterfly valve opening quantity according to the opening and closing sequence of the butterfly valves of the water pump, and calculating the current volume weight coefficient according to the water pump opening quantity and the butterfly valve opening quantity;
the method comprises the steps of obtaining the butterfly valve stress difference when the current water pump reaches the preset water pump opening, calculating the valve opening delay time of the associated butterfly valve of the current water pump through a formula (1), wherein the formula (1) is as follows:
Wherein t Delay line represents the valve opening delay time of an associated butterfly valve of the current water pump, deltaQ Flow of represents the water flow rate when the current water pump reaches the preset water pump opening, mu represents the flow coefficient of the current liquid, and is related to the water pump opening of the current water pump, P represents the butterfly valve stress difference of the associated butterfly valve when the current water pump reaches the preset water pump opening, rho represents the current volume weight coefficient, and A represents the pipe diameter water storage volume between the current water pump and the associated valve.
The present application may be further configured in a preferred example to: after calculating the valve opening delay time between the current water pump and the associated butterfly valve, the method further comprises the following steps:
calculating the pump starting time required by the current water pump from pump starting to the preset water pump opening;
calculating the valve opening time of the associated valve by the formula (2), wherein the formula (2) is as follows:
t Valve ＝t Delay line +t Opening device +t Stability and stability (2)
Wherein t Valve represents the valve opening time of the associated valve, t Opening device represents the pump opening time of the current water pump, and t Stability and stability represents the steady state time when the current water pump reaches the preset water pump opening.
By adopting the technical scheme, the hydraulic influence relation between the previous water pump opening and the associated butterfly valve is constructed by combining the water flow change rate in the water pump starting process in the water pump starting time, the hydraulic change caused by the associated butterfly valve in the water pump starting process is accurately collected, the butterfly valve opening and closing sequence between each water pump associated butterfly valve is correspondingly regulated by combining the water pump opening and closing sequence, the water pump butterfly valve opening and closing sequence comprehensively managed by the water pump and the associated butterfly valve is obtained, the butterfly valve control model of the circulating water pump is constructed by combining the water pump butterfly valve opening and closing sequence, the control logic of each butterfly valve is planned more orderly according to the butterfly valve control model, the valve opening time node of the associated butterfly valve is accurately controlled by combining the valve opening delay time between the current water pump and the associated butterfly valve, the opening and closing of the next water pump are regulated by feeding back according to the valve opening time node of the associated butterfly valve, the current butterfly valve control logic is obtained, and the relevance between the water pump and the associated butterfly valve is improved.
The present application may be further configured in a preferred example to: and performing time sequence matching processing on control logic of the current hydraulic control butterfly valve according to the opening and closing sequence between the adjacent water pumps and the associated butterfly valves and the valve opening delay time to obtain a control logic optimization strategy related to the time sequence of the water pumps and the butterfly valves, and further comprising:
Acquiring the cylinder internal pressure and the cylinder external pressure when the associated butterfly valve reaches a preset valve opening degree, and calculating the cylinder pressure difference between the cylinder internal pressure and the cylinder external pressure;
Judging whether the current DCS cycle period is matched with the oil supplementing period of the oil cylinder according to the oil cylinder pressure difference, and enabling the oil cylinder pressure difference to be in a preset reasonable range;
if so, constructing an oil difference association relation between the oil cylinder pressure difference and the corresponding oil quantity change, adjusting the oil supplementing time of the oil cylinder according to the oil difference association relation, and adjusting the oil inlet opening of the oil cylinder when the oil difference association relation reaches a preset oil supplementing threshold;
If not, the scanning duration of the DCS scanning period is cooperatively regulated, the oil supplementing pressure change in the DCS scanning period change process is obtained, and when the oil supplementing pressure change is stable, the optimal scanning logic optimization strategy of the DCS scanning period is obtained.
By adopting the technical scheme, when the hydraulic control butterfly valve reaches a steady state, the steady state operation of the butterfly valve is maintained by continuing the oil supplementing mode, then the cylinder pressure difference is calculated by acquiring the cylinder internal pressure and the cylinder external pressure of the associated butterfly valve under the state of reaching the preset opening valve, the suitability between the current DCS cycle and the cylinder oil supplementing cycle is intuitively evaluated by combining the cylinder pressure difference, when the cylinder pressure difference is in the preset reasonable range, the oil supplementing time of the cylinder can be regulated by combining the oil difference association relationship, and when the current oil supplementing quantity is insufficient to maintain the preset oil supplementing threshold value, the oil inlet opening of the cylinder is further regulated, and the steady state operation of the butterfly valve is controlled in stages; when the pressure difference of the oil cylinder exceeds a preset reasonable range value, the scanning duration of the DCS scanning period is cooperatively regulated, the oil supplementing pressure change in the DCS scanning period change process is observed to judge whether the optimal scanning period duration is reached, and when the oil supplementing pressure is stable, an optimal scanning logic optimization strategy of the DCS scanning period is obtained, so that the running stability and the safety of the hydraulic control butterfly valve are further improved.
In a second aspect, the above object of the present application is achieved by the following technical solutions:
a control logic optimization system for a hydraulically controlled butterfly valve, comprising:
The data acquisition module is used for acquiring the water pump opening of each circulating water pump and the water pump state corresponding to each water pump opening in the DCS control system, and adjusting the butterfly valve opening of the current hydraulic butterfly valve in a linkage way according to the water pump opening and the water pump state;
the data adjusting module is used for acquiring the circulating water flow direction under the opening degree of the butterfly valve and adjusting the water pump opening and closing sequence of the DCS control system according to the circulating water flow direction and the opening degree of the butterfly valve in a feedback mode;
The data calculation module is used for synchronously adjusting the opening and closing sequence of the butterfly valve of each water pump related butterfly valve according to the opening and closing sequence of the water pumps and calculating the valve opening delay time between each water pump and the corresponding related butterfly valve;
And the data matching module is used for carrying out time sequence matching processing on the control logic of the current hydraulic control butterfly valve according to the opening and closing sequence between the adjacent water pumps and the related butterfly valves and the valve opening delay time to obtain a control logic optimization strategy related to the time sequence of the water pumps and the butterfly valves.
The present application may be further configured in a preferred example to: the data calculation module specifically comprises:
the relation construction submodule is used for acquiring the water pump starting time of a previous water pump reaching a preset water pump opening degree and the water flow change rate of the previous water pump, and constructing a hydraulic influence relation between the opening of the previous water pump and an associated butterfly valve;
The opening and closing adjustment sub-module is used for synchronously adjusting the opening and closing sequence of the butterfly valve of each water pump associated butterfly valve according to the opening and closing sequence of the water pumps, and generating the opening and closing sequence of the butterfly valve of the water pump associated with the opening and closing sequence;
The model construction submodule is used for constructing a butterfly valve control model for cooperatively controlling the opening and closing of the butterfly valves of the water pump according to the hydraulic influence relation and the opening and closing sequence of the butterfly valves of the water pump and planning the control logic of each butterfly valve;
the model processing submodule is used for inputting the opening degree and the state of the water pump of the current water pump into the butterfly valve control model, calculating the valve opening delay time between the current water pump and the related butterfly valve and outputting the butterfly valve control logic of the current related butterfly valve.
The present application may be further configured in a preferred example to: the data matching module further comprises:
The Rong Chongji operator module is used for respectively obtaining the opening quantity of the water pump and the opening quantity of the butterfly valve according to the opening and closing sequence of the butterfly valve of the water pump, and calculating the current volume weight coefficient according to the opening quantity of the water pump and the opening quantity of the butterfly valve;
The valve opening calculation submodule is used for obtaining the butterfly valve stress difference when the current water pump reaches the preset water pump opening, calculating the valve opening delay time of the associated butterfly valve of the current water pump through a formula (1), wherein the formula (1) is as follows:
Wherein t Delay line represents the valve opening delay time of an associated butterfly valve of the current water pump, deltaQ Flow of represents the water flow rate when the current water pump reaches the preset water pump opening, mu represents the flow coefficient of the current liquid, and is related to the water pump opening of the current water pump, P represents the butterfly valve stress difference of the associated butterfly valve when the current water pump reaches the preset water pump opening, rho represents the current volume weight coefficient, and A represents the pipe diameter water storage volume between the current water pump and the associated valve.
Through adopting above-mentioned technical scheme, in the optimal control of hydraulically controlled butterfly valve, change local PLC control into DCS control, control logic optimization of water pump and butterfly valve can be carried out at any time through DCS control system, and combine water pump aperture and water pump state to carry out coordinated adjustment to corresponding associated butterfly valve, improve the coordinated control performance of butterfly valve, and can in time adjust the start-stop sequence of water pump through the feedback when the phenomenon of flowing backward appears, reduce the trouble influence of circulating water to the unit, open and close the continuity between water pump and the associated butterfly valve is guaranteed through the start-stop sequence and the valve delay time between adjacent water pump and the associated butterfly valve, improve the running stability of unit, through carrying out time sequence matching to the control logic of current hydraulically controlled butterfly valve, make the control logic between associated butterfly valve and the circulating water pump more orderly, reduce the work load of inspection personnel, simultaneously also can in time discover the trouble that probably exists between water pump and the associated butterfly valve, improve the control intelligence of hydraulically controlled butterfly valve.
In a third aspect, the above object of the present application is achieved by the following technical solutions:
a computer device 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 control logic optimization method for a hydraulically controlled butterfly valve described above when the computer program is executed.
In a fourth aspect, the above object of the present application is achieved by the following technical solutions:
a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of the control logic optimization method for a hydraulically controlled butterfly valve described above.
In summary, the present application includes at least one of the following beneficial technical effects:
1. In the optimization control of the hydraulic butterfly valve, the in-situ PLC control is changed into DCS control, the control logic of the water pump and the butterfly valve can be optimized at any time through a DCS control system, the corresponding associated butterfly valve is subjected to linkage adjustment by combining the opening degree of the water pump and the water pump state, the linkage control performance of the butterfly valve is improved, the opening and closing sequence of the water pump can be timely adjusted through feedback when the backflow phenomenon occurs, the fault influence of circulating water on a unit is reduced, the opening and closing continuity between the water pump and the associated butterfly valve is ensured through the opening and closing sequence and the valve opening delay time between the adjacent water pump and the associated butterfly valve, the running stability of the unit is improved, the control logic between the associated butterfly valve and the circulating water pump is more orderly through the time sequence matching of the control logic of the current hydraulic butterfly valve, the workload of a patrol personnel is reduced, the possible faults between the water pump and the associated butterfly valve can be timely found, and the control intelligence of the hydraulic butterfly valve is improved;
2. The hydraulic influence relation between the previous water pump opening and the associated butterfly valve is built by combining the water flow change rate in the water pump starting process in the water pump starting time, so that the hydraulic influence relation is beneficial to accurately collecting the hydraulic change caused by the associated butterfly valve in the water pump starting process, and the opening and closing sequence of the butterfly valve among the associated butterfly valves of each water pump is correspondingly adjusted by combining the opening and closing sequence of the water pump, so that the opening and closing sequence of the butterfly valve of the water pump and the associated butterfly valve is obtained, a butterfly valve control model of the circulating water pump is built by combining the opening and closing sequence of the butterfly valve of the water pump, the control logic of each butterfly valve is planned more orderly according to the butterfly valve control model, the opening and closing time node of the associated butterfly valve is accurately controlled by combining the opening and closing time node of the associated butterfly valve, the opening and closing of the current butterfly valve and the next water pump are correspondingly adjusted according to the opening and closing time node of the associated butterfly valve, the association between the water pump and the associated butterfly valve is improved;
3. when the hydraulic control butterfly valve reaches a steady state, maintaining the steady state operation of the butterfly valve in a continuous oil supplementing mode, at the moment, acquiring the pressure inside the oil cylinder and the pressure outside the oil cylinder of the associated butterfly valve in a state of reaching a preset valve opening to calculate the pressure difference of the oil cylinder, intuitively evaluating the suitability between the current DCS circulation period and the oil supplementing period of the oil cylinder by combining the pressure difference of the oil cylinder, adjusting the oil supplementing time of the oil cylinder by combining the association relation of the oil difference when the pressure difference of the oil cylinder is in a preset reasonable range, and further adjusting the oil inlet opening of the oil cylinder when the current oil supplementing quantity is insufficient to maintain a preset oil supplementing threshold value, and controlling the steady state operation of the butterfly valve in stages; when the pressure difference of the oil cylinder exceeds a preset reasonable range value, the scanning duration of the DCS scanning period is cooperatively regulated, the oil supplementing pressure change in the DCS scanning period change process is observed to judge whether the optimal scanning period duration is reached, and when the oil supplementing pressure is stable, an optimal scanning logic optimization strategy of the DCS scanning period is obtained, so that the running stability and the safety of the hydraulic control butterfly valve are further improved.
Drawings
Fig. 1 is a flowchart of an implementation of a control logic optimization method for a hydraulically controlled butterfly valve according to this embodiment.
Fig. 2 is a flowchart showing an implementation of step S30 of the control logic optimizing method for the hydraulically controlled butterfly valve of the present embodiment.
Fig. 3 is a flowchart of an implementation of the timing matching process performed by the control logic optimization method for the hydraulically controlled butterfly valve according to the present embodiment.
Fig. 4 is a block diagram of a control logic optimizing system for a hydraulically controlled butterfly valve according to the present embodiment.
Fig. 5 is a schematic diagram of the internal architecture of a computer device for implementing a control logic optimization method for a hydraulically controlled butterfly valve.
Detailed Description
The present application will be described in further detail with reference to the accompanying drawings.
In one embodiment, as shown in fig. 1, the application discloses a control logic optimization method for a hydraulic control butterfly valve, which specifically comprises the following steps:
s10: and acquiring the water pump opening of each circulating water pump and the water pump state corresponding to each water pump opening in the DCS control system, and adjusting the butterfly valve opening of the current hydraulic butterfly valve in a linkage way according to the water pump opening and the water pump state.
Specifically, in this embodiment, taking a coal-fired power generation unit with a unit of 2X330MW as an example, each unit is provided with 2 circulating water pumps, the water outlet position of each circulating water pump is provided with a corresponding associated butterfly valve, the control circuit of all circulating water pumps and the associated butterfly valves is connected to a DCS control system, the water pump opening of each circulating water pump and the water pump state of whether the water pump is normally opened or not are remotely displayed through the DCS control system, if the water pump opening and the water pump state are combined, the water pump opening and the water pump state are normal or not, and if the current water pump opening works normally or fails, the butterfly valve opening of the hydraulic butterfly valve is correspondingly adjusted according to the water pump opening, so that the normal liquid circulation can be kept between the outlet of the circulating water pump and the hydraulic butterfly valve, and when the water pump is abnormally opened, the influence of the fault of the circulating water pump on the unit is reduced by timely closing the opening of the butterfly valve.
S20: and acquiring the circulating water flow direction under the opening degree of the butterfly valve, and adjusting the water pump opening and closing sequence of the DCS control system according to the circulating water flow direction and the opening degree feedback of the butterfly valve.
Specifically, the water flow sensor preset at the water outlet position of the water pump and the water outlet position of the butterfly valve is used for monitoring the circulating water flow direction when the butterfly valve is opened to the opening of the butterfly valve, such as forward flow or reverse flow when the butterfly valve is reversed, the water pump opening and closing sequence of the DCS control system is adjusted by combining the circulating water flow direction and the butterfly valve opening feedback.
S30: and synchronously adjusting the opening and closing sequence of the butterfly valves of each water pump associated butterfly valve according to the opening and closing sequence of the water pumps, and calculating the valve opening delay time between each water pump and the corresponding associated butterfly valve.
Specifically, as shown in fig. 2, step S30 specifically includes the following steps:
S301: and acquiring the water pump starting time of the previous water pump reaching the preset water pump opening degree and the water flow change rate passing through the previous water pump, and constructing the hydraulic influence relationship between the opening of the previous water pump and the associated butterfly valve.
Specifically, when the previous water pump receives a pump opening instruction sent by the DCS control system, the water pump is started, and is kept stable when the preset water pump opening is reached, the time from the start of the previous water pump to the preset water pump opening is taken as the water pump starting time, the water flow change rate of the previous water pump is obtained through a preset water flow sensor, the water pump starting time and the water flow change rate corresponding to the water pump starting time are combined, the hydraulic influence relation caused by the liquid change received by the relevant butterfly valve in the opening process of the previous water pump is constructed, and if the water flow rate is larger, the hydraulic pressure of the relevant butterfly valve is larger in unit time.
It should be noted that, a plurality of circulating water pumps can be set as required, and the unit is cooled by the circulating water pumps, in this embodiment, two circulating water pumps are taken as examples, and the opening and closing sequence in this embodiment is as follows: and the closed loop circulation of the previous water pump, the previous associated butterfly valve, the next water pump, the next associated butterfly valve and the previous water pump is realized.
S302: and synchronously adjusting the opening and closing sequence of the butterfly valves of each water pump associated butterfly valve according to the opening and closing sequence of the water pumps to generate the opening and closing sequence of the butterfly valves of the water pumps which are related to each other.
Specifically, the butterfly valve of each water pump associated butterfly valve is sequentially opened or closed according to the opening and closing sequence of the water pumps, the associated butterfly valve of the previous water pump is synchronously opened when the previous water pump is opened, the next water pump is opened according to the opening feedback of the previous associated butterfly valve, or the previous water pump is closed according to the fault feedback of the previous associated butterfly valve until a closed-loop circulating water system is formed in the DCS control system, and the opening and closing sequence of the water pump butterfly valves cooperatively managed by the water pump and the associated butterfly valve is obtained.
S303: and constructing a butterfly valve control model for cooperatively controlling the opening and closing of the butterfly valves of the water pump according to the hydraulic influence relation and the opening and closing sequence of the butterfly valves of the water pump, and planning the control logic of each butterfly valve.
Specifically, according to the hydraulic influence relation and the opening and closing sequence of the butterfly valves of the water pumps, the hydraulic changes between adjacent water pumps and the associated butterfly valves are associated, a butterfly valve control model is constructed according to the association relation, the butterfly valve control model is used for cooperatively controlling the opening and closing of the butterfly valves of the water pumps, and the control logic of each butterfly valve is orderly planned according to the opening and closing sequence.
S304: and inputting the opening degree and the state of the current water pump into a butterfly valve control model, calculating the valve opening delay time between the current water pump and the related butterfly valve, and outputting the butterfly valve control logic of the current related butterfly valve.
Specifically, the opening degree and the state of the water pump of the current water pump are input into a butterfly valve control model, and the association relation between the current water pump and the corresponding association butterfly valve is called to calculate the valve opening delay time of the association butterfly valve, and the specific valve opening delay time is realized through the following steps:
s3041: according to the opening and closing sequence of the butterfly valves of the water pump, the opening quantity of the water pump and the opening quantity of the butterfly valves are respectively obtained, and the current volume weight coefficient is calculated according to the opening quantity of the water pump and the opening quantity of the butterfly valves.
Specifically, according to the opening and closing sequence of the butterfly valves of the water pump, the opening quantity of the water pump and the opening quantity of the butterfly valves in the DCS are respectively obtained, the working state of the current circulating water is judged according to the ratio between the opening quantity of the water pump and the total water pump and the ratio between the opening quantity of the butterfly valves and the total butterfly valve, the sum of the opening quantity of the water pump and the opening quantity of the butterfly valves and the sum of the total water pump and the total butterfly valve are used as the current volume weight coefficient.
S3042: the method comprises the steps of obtaining the butterfly valve stress difference when the current water pump reaches the preset water pump opening, calculating the valve opening delay time of the associated butterfly valve of the current water pump through a formula (1), wherein the formula (1) is as follows:
Wherein t Delay line represents the valve opening delay time of the associated butterfly valve of the current water pump, Δq Flow of represents the water flow rate when the current water pump reaches the preset water pump opening, μ represents the flow coefficient of the current liquid, the value of the current water pump is 0.6-0.65 in the embodiment related to the water pump opening of the current water pump, p represents the butterfly valve stress difference of the associated butterfly valve when the current water pump reaches the preset water pump opening, ρ represents the current volume weight coefficient, and a represents the pipe diameter water storage volume between the current water pump and the associated valve.
Specifically, the change of the liquid pressure received by the butterfly valve, namely the stress difference of the butterfly valve, is calculated according to the current water flow and time from the start of the water pump to the time when the opening of the water pump reaches the preset opening.
In one embodiment, after calculating the valve opening delay time between the current water pump and the associated butterfly valve, further comprising:
calculating the pump opening time required by the current water pump from pump opening to preset water pump opening, and calculating the valve opening time of the associated valve through a formula (2), wherein the formula (2) is as follows:
t Valve ＝t Delay line +t Opening device +t Stability and stability (2)
Wherein t Valve represents the valve opening time of the associated valve, t Opening device represents the pump opening time of the current water pump, and t Stability and stability represents the steady state time when the current water pump reaches the preset water pump opening.
Specifically, the timing is started when the current water pump is started, and the corresponding pump starting time is obtained when the water pump reaches the preset water pump opening.
S40: and performing time sequence matching processing on control logic of the current hydraulic butterfly valve according to the opening and closing sequence and the valve opening delay time between the adjacent water pumps and the associated butterfly valves to obtain a control logic optimization strategy related to the time sequence of the water pumps and the butterfly valves.
Specifically, according to the opening and closing sequence between adjacent water pumps and the associated butterfly valves and the calculated valve opening delay time, the valve opening time nodes of the current hydraulic butterfly valves are accurately calculated, so that the opening and closing of the current hydraulic butterfly valves and the circulating water pumps are accurately carried out to each opening and closing time node, the valve opening delay time is associated with the pump opening time and the butterfly valve opening time according to the opening and closing sequence, the pump closing time and the valve closing time are the same, control logic optimization data related to the water pump and the butterfly valve time are obtained, and a control logic optimization strategy is generated by combining the opening and closing instructions of the butterfly valves and the water pumps.
In this embodiment, as shown in fig. 3, according to the opening and closing sequence and the valve opening delay time between adjacent water pumps and associated butterfly valves, the control logic of the current hydraulic control butterfly valve is subjected to time sequence matching processing to obtain a control logic optimization strategy related to the time sequence of the water pumps and the butterfly valves, and the method further includes:
S401: and acquiring the cylinder internal pressure and the cylinder external pressure when the associated butterfly valve reaches the preset valve opening degree, and calculating the cylinder pressure difference between the cylinder internal pressure and the cylinder external pressure.
Specifically, the DCS control system associated with the opening and closing of the oil cylinder is used for acquiring the internal pressure of the oil cylinder and the external pressure of the oil cylinder when the butterfly valve reaches the preset opening degree of the valve, the internal pressure of the oil cylinder is subtracted by the external pressure of the oil cylinder to obtain the pressure difference of the oil cylinder, the internal pressure of the oil cylinder is indicated to be high when the pressure difference of the oil cylinder is positive, and the external pressure of the oil cylinder is indicated to be high when the pressure difference of the oil cylinder is negative.
S402: judging whether the current DCS cycle period is matched with the oil supplementing period of the oil cylinder according to the pressure difference of the oil cylinder, and enabling the pressure difference of the oil cylinder to be in a preset reasonable range.
Specifically, when the absolute value of the oil cylinder pressure difference is larger than the oil pressure safety value, the fact that the current DCS circulation period is not matched with the oil cylinder oil supplementing period is indicated, whether oil supplementing is increased or oil supplementing is reduced is judged according to the positive and negative value conditions of the oil cylinder pressure difference, and whether the oil cylinder pressure difference is in a preset reasonable range is judged by combining the numerical value of the oil cylinder pressure difference and the positive and negative values.
S403: if so, constructing an oil difference association relation between the oil cylinder pressure difference and the corresponding oil quantity change, adjusting the oil supplementing time of the oil cylinder according to the oil difference association relation, and adjusting the oil inlet opening of the oil cylinder when the oil difference association relation reaches a preset oil supplementing threshold.
Specifically, when the pressure difference of the oil cylinder is within a preset reasonable range, the pressure difference of the oil cylinder under each oil supplementing period is obtained, the change value of the pressure difference of the oil cylinder under the adjacent oil supplementing period is calculated, the oil difference incidence relation between the pressure difference of the oil cylinder and the corresponding oil quantity change is built by combining the oil quantity change difference under each oil supplementing period, the oil supplementing time of the next oil supplementing period is dynamically adjusted by combining the oil difference incidence relation, and when the preset oil supplementing threshold is reached, the command priority of the oil inlet opening adjustment of the oil cylinder is adjusted to be larger than the command priority of the oil supplementing time adjustment, so that the oil inlet opening adjustment of the oil cylinder is preferentially carried out to meet the current oil quantity requirement of the oil cylinder.
S404: if not, the scanning duration of the DCS scanning period is cooperatively regulated, the oil supplementing pressure change in the DCS scanning period change process is obtained, and when the oil supplementing pressure change is stable, the optimal scanning logic optimization strategy of the DCS scanning period is obtained.
Specifically, when the oil cylinder pressure difference exceeds a preset reasonable range, the scanning duration of the DCS scanning period is cooperatively adjusted, if the oil cylinder pressure difference positively floats, the DCS scanning duration is reduced, and if the oil cylinder pressure difference negatively floats, the DCS scanning duration is increased, the oil supplementing pressure change value of each DCS scanning period is obtained, and when the oil supplementing pressure change value reaches stability, namely the difference between adjacent oil supplementing pressure change values is in a reasonable range, the current DCS scanning duration is set to be the optimal DCS scanning period duration, so that the optimal scanning logic optimization strategy of the DCS scanning period is obtained.
The optimal scanning duration in this embodiment is 250 milliseconds.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present application.
In one embodiment, a control logic optimization system for the hydraulic control butterfly valve is provided, and the control logic optimization system for the hydraulic control butterfly valve is in one-to-one correspondence with the control logic optimization method for the hydraulic control butterfly valve in the embodiment. As shown in fig. 4, the control logic optimization system for the hydraulically controlled butterfly valve comprises a data acquisition module, a data adjustment module, a data calculation module and a data matching module. The functional modules are described in detail as follows:
the data acquisition module is used for acquiring the water pump opening of each circulating water pump in the DCS control system and the water pump state corresponding to each water pump opening, and adjusting the butterfly valve opening of the current hydraulic butterfly valve in a linkage mode according to the water pump opening and the water pump state.
The data adjusting module is used for acquiring the circulating water flow direction under the opening degree of the butterfly valve and adjusting the water pump opening and closing sequence of the DCS control system according to the circulating water flow direction and the opening degree feedback of the butterfly valve.
The data calculation module is used for synchronously adjusting the opening and closing sequence of the butterfly valves of each water pump related butterfly valve according to the opening and closing sequence of the water pumps and calculating the valve opening delay time between each water pump and the corresponding related butterfly valve.
And the data matching module is used for carrying out time sequence matching processing on the control logic of the current hydraulic control butterfly valve according to the opening and closing sequence and the valve opening delay time between the adjacent water pumps and the associated butterfly valves so as to obtain a control logic optimization strategy related to the time sequence of the water pumps and the butterfly valves.
Preferably, the data calculation module specifically includes:
The relation construction submodule is used for acquiring the water pump starting time of the previous water pump reaching the preset water pump opening degree and the water flow change rate of the previous water pump, and constructing the hydraulic influence relation between the opening of the previous water pump and the associated butterfly valve.
The opening and closing adjusting sub-module is used for synchronously adjusting the opening and closing sequence of the butterfly valve of each water pump associated butterfly valve according to the opening and closing sequence of the water pumps, and generating the opening and closing sequence of the butterfly valves of the water pumps which are related to opening and closing.
The model construction submodule is used for constructing a butterfly valve control model for cooperatively controlling the opening and closing of the butterfly valves of the water pump according to the hydraulic influence relation and the opening and closing sequence of the butterfly valves of the water pump and planning the control logic of each butterfly valve.
The model processing submodule is used for inputting the opening degree and the state of the water pump of the current water pump into the butterfly valve control model, calculating the valve opening delay time between the current water pump and the related butterfly valve and outputting the butterfly valve control logic of the current related butterfly valve.
Preferably, calculating the valve opening delay time between the current water pump and the associated butterfly valve specifically includes:
According to the opening and closing sequence of the butterfly valves of the water pump, the opening quantity of the water pump and the opening quantity of the butterfly valves are respectively obtained, and the current volume weight coefficient is calculated according to the opening quantity of the water pump and the opening quantity of the butterfly valves.
The method comprises the steps of obtaining the butterfly valve stress difference when the current water pump reaches the preset water pump opening, calculating the valve opening delay time of the associated butterfly valve of the current water pump through a formula (1), wherein the formula (1) is as follows:
Wherein t Delay line represents the valve opening delay time of an associated butterfly valve of the current water pump, deltaQ Flow of represents the water flow rate when the current water pump reaches the preset water pump opening, mu represents the flow coefficient of the current liquid, and is related to the water pump opening of the current water pump, P represents the butterfly valve stress difference of the associated butterfly valve when the current water pump reaches the preset water pump opening, rho represents the current volume weight coefficient, and A represents the pipe diameter water storage volume between the current water pump and the associated valve.
Preferably, after calculating the valve opening delay time between the current water pump and the associated butterfly valve, the method further comprises:
And calculating the pump starting time required by the current water pump from pump starting to the preset water pump opening.
Calculating the valve opening time of the associated valve by the formula (2), wherein the formula (2) is as follows:
t Valve ＝t Delay line +t Opening device +t Stability and stability (2)
Wherein t Valve represents the valve opening time of the associated valve, t Opening device represents the pump opening time of the current water pump, and t Stability and stability represents the steady state time when the current water pump reaches the preset water pump opening.
Preferably, the data matching module further includes:
the oil pressure parameter obtaining submodule is used for obtaining the oil cylinder internal pressure and the oil cylinder external pressure when the associated butterfly valve reaches the preset valve opening degree, and calculating the oil cylinder pressure difference between the oil cylinder internal pressure and the oil cylinder external pressure.
The oil supplementing judging sub-module is used for judging whether the current DCS cycle period is matched with the oil supplementing period of the oil cylinder according to the pressure difference of the oil cylinder, and the pressure difference of the oil cylinder is in a preset reasonable range.
And the oil supplementing adjustment sub-module is used for constructing an oil difference association relation between the oil cylinder pressure difference and the corresponding oil quantity change if the oil supplementing adjustment sub-module is used for adjusting the oil supplementing time of the oil cylinder according to the oil difference association relation, and adjusting the oil inlet opening of the oil cylinder when the oil difference association relation reaches a preset oil supplementing threshold value.
And the period adjusting sub-module is used for cooperatively adjusting the scanning duration of the DCS scanning period if not, acquiring the oil supplementing pressure change in the DCS scanning period change process, and obtaining the optimal scanning logic optimization strategy of the DCS scanning period when the oil supplementing pressure change is stable.
The specific limitation regarding the control logic optimization method for the hydraulic butterfly valve can be found in the above description of the control logic optimization method for the hydraulic butterfly valve, and will not be described in detail herein. The respective modules in the control logic optimization method for the hydraulic control butterfly valve can be fully or partially realized by software, hardware and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a computer device is provided, which may be a server, the internal structure of which may be as shown in fig. 5. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the computer device is used for storing control logic optimization data of the hydraulic control butterfly valve. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program when executed by a processor implements a control logic optimization method for a hydraulically controlled butterfly valve.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, implements the steps of a control logic optimization method for a hydraulically controlled butterfly valve.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (SYNCHLINK) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the method is divided into different functional units or modules to perform all or part of the functions described above.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims (5)

1. A control logic optimization method for a hydraulically controlled butterfly valve, comprising:
Acquiring the water pump opening of each circulating water pump and the water pump state corresponding to each water pump opening in a DCS control system, and adjusting the butterfly valve opening of the current hydraulic butterfly valve in a linkage way according to the water pump opening and the water pump state;
acquiring a circulating water flow direction under the opening degree of the butterfly valve, and adjusting the water pump opening and closing sequence of a DCS control system according to the circulating water flow direction and the opening degree of the butterfly valve in a feedback manner;
Synchronously adjusting the opening and closing sequence of the butterfly valves of each water pump associated butterfly valve according to the opening and closing sequence of the water pumps, and calculating the valve opening delay time between each water pump and the corresponding associated butterfly valve;
Performing time sequence matching processing on control logic of the current hydraulic butterfly valve according to the opening and closing sequence between the adjacent water pump and the related butterfly valve and the valve opening delay time to obtain a control logic optimization strategy related to the time sequence of the water pump and the butterfly valve;
the method comprises the steps of synchronously adjusting the opening and closing sequence of butterfly valves of each water pump associated butterfly valve according to the opening and closing sequence of the water pumps, and calculating the valve opening delay time between each water pump and the corresponding associated butterfly valve, and specifically comprises the following steps:
Acquiring the water pump starting time of a previous water pump reaching a preset water pump opening degree and the water flow change rate passing through the previous water pump, and constructing a hydraulic influence relation between the opening of the previous water pump and an associated butterfly valve;
synchronously adjusting the opening and closing sequence of the butterfly valve of each water pump associated butterfly valve according to the opening and closing sequence of the water pumps, and generating the opening and closing sequence of the butterfly valve of the water pump associated butterfly valve;
Constructing a butterfly valve control model for cooperatively controlling the opening and closing of the butterfly valves of the water pump according to the hydraulic influence relation and the opening and closing sequence of the butterfly valves of the water pump, and planning the control logic of each butterfly valve;
inputting the opening degree and the state of the current water pump into the butterfly valve control model, calculating the valve opening delay time between the current water pump and the related butterfly valve, and outputting the butterfly valve control logic of the current related butterfly valve;
the method for calculating the valve opening delay time between the current water pump and the associated butterfly valve specifically comprises the following steps:
Respectively acquiring the water pump opening quantity and the butterfly valve opening quantity according to the opening and closing sequence of the butterfly valves of the water pump, and calculating the current volume weight coefficient according to the water pump opening quantity and the butterfly valve opening quantity;
the method comprises the steps of obtaining the butterfly valve stress difference when the current water pump reaches the preset water pump opening, calculating the valve opening delay time of the associated butterfly valve of the current water pump through a formula (1), wherein the formula (1) is as follows:
wherein t Delay line represents the valve opening delay time of an associated butterfly valve of the current water pump, deltaQ Flow of represents the water flow rate when the current water pump reaches the preset water pump opening, mu represents the flow coefficient of the current liquid, and is related to the water pump opening of the current water pump, P represents the butterfly valve stress difference of the associated butterfly valve when the current water pump reaches the preset water pump opening, rho represents the current volume weight coefficient, A represents the pipe diameter water storage volume between the current water pump and the associated valve;
the method comprises the steps of carrying out time sequence matching processing on control logic of a current hydraulic control butterfly valve according to the opening and closing sequence between adjacent water pumps and related butterfly valves and the valve opening delay time to obtain a control logic optimization strategy related to the time sequence of the water pumps and the butterfly valves, and further comprises the following steps:
Acquiring the cylinder internal pressure and the cylinder external pressure when the associated butterfly valve reaches a preset valve opening degree, and calculating the cylinder pressure difference between the cylinder internal pressure and the cylinder external pressure;
Judging whether the current DCS cycle period is matched with the oil supplementing period of the oil cylinder according to the oil cylinder pressure difference, and enabling the oil cylinder pressure difference to be in a preset reasonable range;
if so, constructing an oil difference association relation between the oil cylinder pressure difference and the corresponding oil quantity change, adjusting the oil supplementing time of the oil cylinder according to the oil difference association relation, and adjusting the oil inlet opening of the oil cylinder when the oil difference association relation reaches a preset oil supplementing threshold;
If not, the scanning duration of the DCS scanning period is cooperatively regulated, the oil supplementing pressure change in the DCS scanning period change process is obtained, and when the oil supplementing pressure change is stable, the optimal scanning logic optimization strategy of the DCS scanning period is obtained.
2. The method of claim 1, wherein after calculating the valve opening delay time between the current water pump and the associated butterfly valve, further comprising:
calculating the pump starting time required by the current water pump from pump starting to the preset water pump opening;
calculating the valve opening time of the associated valve by the formula (2), wherein the formula (2) is as follows:
t Valve ＝t Delay line +t Opening device +t Stability and stability (2)
Wherein t Valve represents the valve opening time of the associated valve, t Opening device represents the pump opening time of the current water pump, and t Stability and stability represents the steady state time when the current water pump reaches the preset water pump opening.
3. A control logic optimization system for a hydraulically controlled butterfly valve, characterized in that it is applied to a control logic optimization method for a hydraulically controlled butterfly valve as claimed in any of the foregoing claims 1-2, said system comprising:
The data acquisition module is used for acquiring the water pump opening of each circulating water pump and the water pump state corresponding to each water pump opening in the DCS control system, and adjusting the butterfly valve opening of the current hydraulic butterfly valve in a linkage way according to the water pump opening and the water pump state;
the data adjusting module is used for acquiring the circulating water flow direction under the opening degree of the butterfly valve and adjusting the water pump opening and closing sequence of the DCS control system according to the circulating water flow direction and the opening degree of the butterfly valve in a feedback mode;
The data calculation module is used for synchronously adjusting the opening and closing sequence of the butterfly valve of each water pump related butterfly valve according to the opening and closing sequence of the water pumps and calculating the valve opening delay time between each water pump and the corresponding related butterfly valve;
The data matching module is used for carrying out time sequence matching processing on the control logic of the current hydraulic control butterfly valve according to the opening and closing sequence between the adjacent water pumps and the related butterfly valves and the valve opening delay time to obtain a control logic optimization strategy related to the time sequence of the water pumps and the butterfly valves;
The data calculation module specifically comprises:
the relation construction submodule is used for acquiring the water pump starting time of a previous water pump reaching a preset water pump opening degree and the water flow change rate of the previous water pump, and constructing a hydraulic influence relation between the opening of the previous water pump and an associated butterfly valve;
The opening and closing adjustment sub-module is used for synchronously adjusting the opening and closing sequence of the butterfly valve of each water pump associated butterfly valve according to the opening and closing sequence of the water pumps, and generating the opening and closing sequence of the butterfly valve of the water pump associated with the opening and closing sequence;
The model construction submodule is used for constructing a butterfly valve control model for cooperatively controlling the opening and closing of the butterfly valves of the water pump according to the hydraulic influence relation and the opening and closing sequence of the butterfly valves of the water pump and planning the control logic of each butterfly valve;
The model processing submodule is used for inputting the opening degree and the state of the water pump of the current water pump into the butterfly valve control model, calculating the valve opening delay time between the current water pump and the related butterfly valve and outputting the butterfly valve control logic of the current related butterfly valve;
wherein, the data matching module further comprises:
The Rong Chongji operator module is used for respectively obtaining the opening quantity of the water pump and the opening quantity of the butterfly valve according to the opening and closing sequence of the butterfly valve of the water pump, and calculating the current volume weight coefficient according to the opening quantity of the water pump and the opening quantity of the butterfly valve;
The valve opening calculation submodule is used for obtaining the butterfly valve stress difference when the current water pump reaches the preset water pump opening, calculating the valve opening delay time of the associated butterfly valve of the current water pump through a formula (1), wherein the formula (1) is as follows:
wherein t Delay line represents the valve opening delay time of an associated butterfly valve of the current water pump, deltaQ Flow of represents the water flow rate when the current water pump reaches the preset water pump opening, mu represents the flow coefficient of the current liquid, and is related to the water pump opening of the current water pump, P represents the butterfly valve stress difference of the associated butterfly valve when the current water pump reaches the preset water pump opening, rho represents the current volume weight coefficient, A represents the pipe diameter water storage volume between the current water pump and the associated valve;
wherein, the data matching module further comprises:
the oil pressure parameter acquisition submodule is used for acquiring the oil cylinder internal pressure and the oil cylinder external pressure when the associated butterfly valve reaches a preset valve opening degree, and calculating the oil cylinder pressure difference between the oil cylinder internal pressure and the oil cylinder external pressure;
the oil supplementing judging submodule is used for judging whether the current DCS cycle period is matched with the oil supplementing period of the oil cylinder according to the pressure difference of the oil cylinder, and enabling the pressure difference of the oil cylinder to be in a preset reasonable range;
The oil supplementing adjustment sub-module is used for constructing an oil difference association relation between the oil cylinder pressure difference and the corresponding oil quantity change if the oil supplementing adjustment sub-module is used for adjusting the oil supplementing time of the oil cylinder according to the oil difference association relation, and adjusting the oil inlet opening of the oil cylinder when the oil difference association relation reaches a preset oil supplementing threshold;
And the period adjusting sub-module is used for cooperatively adjusting the scanning duration of the DCS scanning period if not, acquiring the oil supplementing pressure change in the DCS scanning period change process, and obtaining the optimal scanning logic optimization strategy of the DCS scanning period when the oil supplementing pressure change is stable.
4. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program, carries out the steps of the control logic optimization method for a hydraulically controlled butterfly valve as claimed in any one of claims 1 to 2.
5. 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 control logic optimization method for a hydraulically controlled butterfly valve as claimed in any one of claims 1 to 2.
CN202410050065.0A 2024-01-11 2024-01-11 Control logic optimization method and system for hydraulic control butterfly valve Active CN117850372B (en)

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CN109000027A (en) * 2018-08-06 2018-12-14 中国神华能源股份有限公司 Control method and control device for hydraulic butterfly valve
CN112524320A (en) * 2020-11-30 2021-03-19 华能国际电力股份有限公司营口电厂 Hydraulic butterfly valve control system

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CN205334139U (en) * 2015-12-18 2016-06-22 江苏大唐国际吕四港发电有限责任公司 Liquid accuse butterfly valve control system
CN115437314A (en) * 2022-01-07 2022-12-06 呼伦贝尔安泰热电有限责任公司海拉尔热电厂 Method for changing PLC control of oil station actuating mechanism into DCS control

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CN109000027A (en) * 2018-08-06 2018-12-14 中国神华能源股份有限公司 Control method and control device for hydraulic butterfly valve
CN112524320A (en) * 2020-11-30 2021-03-19 华能国际电力股份有限公司营口电厂 Hydraulic butterfly valve control system

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