CN112731982A - Self-adaptive control method of pressure maintenance system - Google Patents
Self-adaptive control method of pressure maintenance system Download PDFInfo
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- CN112731982A CN112731982A CN202011621365.8A CN202011621365A CN112731982A CN 112731982 A CN112731982 A CN 112731982A CN 202011621365 A CN202011621365 A CN 202011621365A CN 112731982 A CN112731982 A CN 112731982A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
- G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
Abstract
A self-adaptive control method for a pressure maintenance system relates to a control system which comprises a plurality of fixed-frequency oil pumps or air compressors with different models and specifications as pressure maintenance equipment, and further comprises a pressure container and a non-pressure container, wherein the pressure container is connected with the non-pressure container through the pressure maintenance equipment. The pressure container is provided with a first sensor, and the pressureless container is provided with a second sensor. The first sensor, the second sensor and the pressure maintaining equipment are connected with a controller, and the controller is connected with the human-computer interaction device. The invention can solve the problems that the random consumption load with longer change period of the pressure maintenance system is not matched with the output power of the pressure maintenance equipment, namely the system pressure is not matched with the pressure maintenance equipment pressurization capacity due to the fact that the random consumption descending speed with longer change period is not matched with the pressure maintenance equipment, the pressure maintenance equipment is frequently started, stopped or loaded and unloaded, the abrasion consumption of equipment elements is intensified, the service life of the pressure maintenance equipment is influenced, energy loss is caused, the system energy efficiency and the economy are influenced, and the like.
Description
Technical Field
The invention belongs to the field of industrial control, and particularly relates to a self-adaptive control method of a pressure maintenance system.
Background
In industrial control, there are many applications that require a pressure maintenance system, such as a hydro-generator set governor that regulates vane opening, set power and frequency, requiring a governor hydraulic system; the middle-low pressure gas system is needed in occasions such as a large shaft gas supplementing system of the hydroelectric generating set, a bus micro-positive pressure system, a speed regulator pressure oil tank gas supplementing system, an air brake mechanical braking system and the like. Governor hydraulic systems and medium and low pressure air systems are typical pressure maintenance systems. The pressure maintenance system is usually designed with a plurality of fixed-frequency oil pumps or air compressors with the same model and specification as pressure maintenance equipment, however, because the pressure maintenance system load has a steady-state fixed consumption load and a random consumption load, if the steady-state fixed consumption load is not matched with the output power of the pressure maintenance equipment, i.e. the rate at which the system pressure drops due to steady state fixed consumption does not match the magnitude of the capacity of the pressure maintenance device to pressurize, or the random consumption load with a longer period of variation does not match the pressure maintenance device output power, namely, the speed of system pressure reduction due to long-period random consumption is not matched with the pressure capacity of the pressure maintaining equipment, so that the pressure maintaining equipment is frequently started, stopped or unloaded, the abrasion consumption of the original equipment is aggravated, the service life of the pressure maintaining equipment is influenced, and meanwhile, the energy loss is caused, and the energy efficiency and the economical efficiency of the system are influenced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a self-adaptive control method of a pressure maintenance system, which aims to solve the problems that a steady-state fixed consumption load is not matched with the output power of pressure maintenance equipment, a random consumption load with a long change period is not matched with the output power of the pressure maintenance equipment, namely the system pressure is caused by the fact that the speed of the random consumption reduction with the long steady-state fixed and change periods is not matched with the pressurizing capacity of the pressure maintenance equipment, the pressure maintenance equipment is frequently started and stopped or loaded and unloaded, the abrasion consumption of equipment components is intensified, the service life of the pressure maintenance equipment is influenced, energy loss is caused, and the energy efficiency and the economical efficiency of the.
The technical scheme adopted by the invention is as follows:
an adaptive control method for a pressure maintenance system, comprising the steps of:
And 3, collecting the pressure maintaining system pressure P1 by the controller, and starting timing.
And 4, detecting whether the timing is finished for t minutes by the controller, if so, entering the step 5, and otherwise, continuously detecting.
And 5, collecting pressure maintaining system pressure P2 by the controller.
And 6, calculating the steady-state fixed consumption load P of the pressure maintenance system as (P1-P2)/t by the controller.
And 7, if pi is not more than p and is less than pj, starting an i # oil pump or air compressor as main pressurizing equipment to operate and load for a long time, and entering the step 10. pi and pj are the information of the pressurization capacities of n constant-frequency oil pumps or air compressors in the pressure maintenance equipment, and the two adjacent corresponding equipment i # and j # are ranked from small to large. Otherwise, go to step 8.
And 8, if p is less than p1, starting the 1# oil pump or air compressor as the main pressurizing equipment to operate and load for a long time, and entering the step 10. Otherwise, go to step 9.
And 9, starting the n # oil pump or the air compressor as main pressurizing equipment to operate and load for a long time, and entering step 10.
Step 10, the controller collects pressure maintenance system pressure P3 and starts timing.
And 11, detecting whether the timing is finished for t minutes by the controller, if so, entering the step 5, and otherwise, continuously detecting.
Step 12, the controller collects a pressure maintenance system pressure P4.
And step 13, calculating the random consumption load P' ═ P3-P4)/t of the pressure maintenance system by the controller.
Step 14, generating a pressurizing capacity set according to the pressurizing capacities of n-1 fixed-frequency oil pumps or air compressors after the main pressurizing equipment is removed from the pressure maintaining equipment, wherein the set comprises single pressurizing capacity, any 2 combined pressurizing capacities, namely the combined pressurizing capacity formed by adding any 2 pressurizing equipment together, … … any n-2 combined pressurizing capacities and any n-1 combined pressurizing capacities, and the set comprises
The pressurizing capacity elements sort all the elements of the set from small to large, and the sort order numbers are sequentially
The pressuring ability elements are each p'm，
The pressurization capability element is associated with its corresponding jointly pressurized pressurization device.
Step 15, if p'i≤p’<p’jThen starting the pressuring capability element p'jThe associated oil pump or air compressor pressurization device is loaded as a backup pressurization device operation, proceeding to step 18. p'iAnd p'jThe elements in the pressurizing capacity set are sorted from small to large, and then the adjacent pressurizing capacity elements are arranged. Otherwise, step 16 is entered.
Step 16, if p'<p’1Then starting the pressuring capability element p'1The associated oil pump or air compressor pressurization device is loaded as a backup pressurization device operation, proceeding to step 18. Otherwise, step 17 is entered.
And step 17, starting all oil pump or air compressor pressurizing equipment to be used as standby pressurizing equipment for loading, and entering step 18.
Step 18, if the pressure of the pressure maintenance system is less than the pressure P of the standby equipmentPrepare forAll the spare pressurizing equipment is started and loaded. Step 19 is entered.
Step 19, if the pressure is maintained to be not less than the rated system pressure PForehead (forehead)All the spare pressurizing equipment is unloaded and stopped. Step 20 is entered.
Step 20, when the pressure of the pressure maintaining system is less than the pressure P of the standby equipmentPrepare forAnd rated pressure PForehead (forehead)If not, returning to step 10, otherwise returning to step 18.
The invention discloses a self-adaptive control method of a pressure maintenance system, which has the following technical effects:
1. the pressure maintaining system provided by the invention is designed with the fixed-frequency oil pumps or air compressors with different pressurizing capacities as pressure maintaining equipment so as to be suitable for the conditions that steady-state fixed consumption loads and random consumption loads are in different size ranges, and thus the pressure maintaining system provided by the invention has wide adaptability.
2. The self-adaptive control method of the pressure maintenance system adopts an optimization algorithm on the premise of adopting a fixed-frequency oil pump or an air compressor, and selects the fixed-frequency oil pump or the air compressor which is close to the load capacity as far as possible as a main pressurizing device to operate and load for a long time according to the calculated steady-state fixed consumption load, thereby improving the stability of the pressure of a control object, reducing the pressure change speed as far as possible, ensuring the stability of the pressure, avoiding the frequent starting, stopping or loading and unloading of the pressure maintenance device, reducing the abrasion consumption of the original components of the device, prolonging the service life of the pressure maintenance device, reducing the energy consumption of the pressure maintenance system and improving the economical efficiency of the pressure maintenance system. Therefore, the method has good control performance and economy.
3. By adopting the self-adaptive control method of the pressure maintenance system, on the premise of adopting the fixed-frequency oil pump or air compressor, an optimization algorithm is adopted, and the combined pressure fixed-frequency oil pump or air compressor corresponding to the pressure capacity element close to the load capacity is selected as far as possible to operate according to the calculated random consumption load, so that the stability of the control object force is improved, the pressure change speed is reduced as far as possible, the stability of the pressure is ensured, the frequent starting, stopping or loading and unloading of the pressure maintenance equipment is avoided, the abrasion consumption of the original parts of the equipment is reduced, and the purposes of prolonging the service life of the pressure maintenance equipment, reducing the energy consumption of the pressure maintenance system and improving the economical efficiency of the pressure maintenance system. Therefore, the method has good control performance and economy.
4. By adopting the self-adaptive control method of the pressure maintenance system, the matching of steady-state fixed consumption loads and the matching of random consumption loads are considered, and the control method is more complete and comprehensive and has better effect.
5. The self-adaptive control method of the pressure maintenance system can solve the problems that the steady-state fixed consumption load of the pressure maintenance system is not matched with the output power of the pressure maintenance equipment, namely the system pressure is not matched with the pressurizing capacity of the pressure maintenance equipment due to the fact that the descending speed of the steady-state fixed consumption is not matched with the pressure maintenance equipment, the pressure maintenance equipment is frequently started, stopped or unloaded, the abrasion consumption of the original equipment is aggravated, the service life of the pressure maintenance equipment is influenced, energy loss is caused, the energy efficiency and the economical efficiency of the system are influenced, and the like.
6. The self-adaptive control method of the pressure maintenance system can solve the problems that the random consumption load with a long change period of the pressure maintenance system is not matched with the output power of the pressure maintenance equipment, namely the system pressure is not matched with the pressurization capacity of the pressure maintenance equipment due to the fact that the random consumption reduction speed with a long change period is not matched with the pressurization capacity of the pressure maintenance equipment, the pressure maintenance equipment is started, stopped or unloaded frequently, the abrasion consumption of equipment elements is aggravated, the service life of the pressure maintenance equipment is influenced, meanwhile, energy loss is caused, the energy efficiency and the economical efficiency of the system are influenced, and the.
Drawings
FIG. 1 is a schematic diagram of a pressure maintenance system according to the present invention.
FIG. 2 is a flow chart of an adaptive control method for a pressure maintenance system according to the present invention.
Detailed Description
As shown in fig. 1, the pressure maintenance system of the present invention includes a plurality of fixed-frequency oil pumps or air compressors with different models and specifications as pressure maintenance equipment 4, and further includes a pressure vessel 1, a non-pressure vessel 2, a pipeline 3, a sensor 5, a controller 6, a human-computer interaction device 7, an electrical circuit 8, and a communication circuit 9. The sensor 5 includes a first sensor and a second sensor.
The pressure container 1 is connected with the pressureless container 2 through a pressure maintaining device 4;
the pressure container 1 is provided with a first sensor, and the pressureless container 2 is provided with a second sensor.
The first sensor, the second sensor and the pressure maintaining equipment 4 are all connected with a controller 6, and the controller 6 is connected with a human-computer interaction device 7.
The pressure container 1 is a pressure oil tank or a pressure gas tank.
The non-pressure container 2 is a non-pressure oil tank or an air bag.
The pressure vessel 1 is connected to a pressure maintenance device 4 via a pipeline, and the pressureless vessel 2 is connected to the pressure maintenance device 4 via a pipeline 3.
The pressure maintaining equipment 4 is n fixed-frequency oil pumps or air compressors with different models and specifications, and the n fixed-frequency oil pumps or air compressors are respectively 1# and 2# … … n # according to the sequence from small to large of the pressurizing capacity.
The sensor 5 collects physical quantity parameters, such as pressure and the like, of the pressure container 1 and the non-pressure container 2 in the pressure maintenance system.
The controller 6 receives the pressurizing capacity information p1, p2, …, pn corresponding to n fixed-frequency oil pumps or air compressors in the pressure maintaining equipment 4 arranged by the man-machine interaction device 7 through the communication circuit 9, (p1< p2< … < pn), and after carrying out logic processing by adopting a pressure maintaining system self-adaptive control method according to the pressure maintaining system state signal collected by the sensor 5 received through the electric circuit 8, controls the n fixed-frequency oil pumps or air compressors with incompletely same model number specification in the pressure maintaining equipment 4 through the electric circuit 8, and simultaneously transmits the pressure maintaining system state information to the man-machine interaction device 7 through the communication circuit 9.
The human-computer interaction device 7 communicates with the controller 6. The information of the pressurizing capacity of n fixed-frequency oil pumps or air compressors in the pressure maintaining equipment 4 arranged by a user through the human-computer interaction device 7 is transmitted to the controller 6, and meanwhile, the human-computer interaction device 7 acquires the parameter information of the pressure maintaining system sent by the controller 6 for graphical display.
The pressure maintenance device 4 is connected with the controller 6 through an electric circuit 8; the sensor 5 is connected with the controller 6; and the transmission of the state signal and the control signal is realized.
The controller 6 is connected with the man-machine interaction device 7 through the communication loop 9, and transmission of pressurization capacity information and state information is achieved.
The sensor 5 is a pressure transmitter with a brand of KELLER and a model number of PA.23SY/100 bar/81594.55.
The controller 6 is a PLC controller with the model number of 140CPU67160 and the brand number of Schneider.
The man-machine interaction device 7 adopts a touch screen with the brand name of Schneider and the model number of XBTGT 7340.
The electric loop 8 adopts a universal national standard cable.
The communication loop 9 adopts a universal Ethernet network cable.
The fixed-frequency oil pump motor adopts a fixed-frequency motor with the brand ABB and the model M3BP series.
The fixed frequency air compressor adopts a DG series piston middle-high pressure air compressor with a Brand of Delier and the model of DG0.8/100, DG3/100DG, DG5.5/100 and the like.
As shown in fig. 2, the self-adaptive control method of a pressure maintenance system according to the present invention comprises the following steps:
And 3, collecting the pressure maintaining system pressure P1 by the controller 6, and starting timing.
And 4, detecting whether the timing is finished for t minutes by the controller 6, if so, entering the step 5, and otherwise, continuously detecting.
Step 5, the controller 6 collects the pressure maintenance system pressure P2.
Step 6, the controller 6 calculates the steady-state fixed consumption load P of the pressure maintenance system as (P1-P2)/t.
And 7, if pi is not more than p and is less than pj, starting an i # oil pump or air compressor as main pressurizing equipment to operate and load for a long time, and entering the step 10. pi and pj are the information of the pressurization capacities of n constant-frequency oil pumps or air compressors in the pressure maintenance equipment 4, which are arranged from small to large, and two adjacent corresponding equipment i # and j #. Otherwise, go to step 8.
And 8, if p is less than p1, starting the 1# oil pump or air compressor as the main pressurizing equipment to operate and load for a long time, and entering the step 10. Otherwise, go to step 9.
And 9, starting the n # oil pump or the air compressor as main pressurizing equipment to operate and load for a long time, and entering step 10.
Step 10, the controller 6 collects the pressure maintenance system pressure P3 and starts timing.
And 11, detecting whether the timing is finished for t minutes by the controller 6, if so, entering the step 5, and otherwise, continuously detecting.
Step 12, the controller 6 collects a pressure maintenance system pressure P4.
In step 13, the controller 6 calculates the pressure maintenance system random consumption load P ═ P3-P4)/t.
Step 14, generating a pressurizing capacity set according to the pressurizing capacities of the n-1 constant frequency oil pumps or air compressors after the main pressurizing equipment is removed from the pressure maintaining equipment 4, wherein the set comprises a single pressurizing capacity, any 2 combined pressurizing capacities, namely the combined pressurizing capacity of any 2 pressurizing equipment added together, … … any n-2 combined pressurizing capacities and any n-1 combined pressurizing capacities, and the set comprises
The pressurizing capacity elements sort all the elements of the set from small to large, and the sort order numbers are sequentially
Each of the pressure capacity elements is p’ m，
The pressurization capability element is associated with its corresponding jointly pressurized pressurization device.
Step 15, if p'i≤p’<p’jThen starting the pressuring capability element p'jThe associated oil pump or air compressor pressurization device is loaded as a backup pressurization device operation, proceeding to step 18. p'iAnd p'jThe elements in the pressurizing capacity set are sorted from small to large, and then the adjacent pressurizing capacity elements are arranged. Otherwise, step 16 is entered.
Step 16, if p'<p’1Then starting the pressuring capability element p'1With associated oil or air compressor pressurising means as standbyThe loading is run with the compression device and step 18 is entered. Otherwise, step 17 is entered.
And step 17, starting all oil pump or air compressor pressurizing equipment to be used as standby pressurizing equipment for loading, and entering step 18.
Step 18, if the pressure of the pressure maintenance system is less than the pressure P of the standby equipmentPrepare forAll the spare pressurizing equipment is started and loaded. Step 19 is entered.
Step 19, if the pressure is maintained to be not less than the rated system pressure PForehead (forehead)All the spare pressurizing equipment is unloaded and stopped. Step 20 is entered.
Step 20, when the pressure of the pressure maintaining system is less than the pressure P of the standby equipmentPrepare forAnd rated pressure PForehead (forehead)If not, returning to step 10, otherwise returning to step 18.
Example (b):
the invention is applied to the start-stop control of the pressurized oil pump of a hydraulic system of a speed regulator of a certain power station. 4 pressurizing oil pumps are designed in the system, wherein 1 pump is started to serve as a main working pump and the other 3 pumps serve as standby pumps during normal work. The method of the present invention will be described in detail below with reference to the examples.
The method for controlling the pressurized oil pump of the hydraulic system of the speed regulator of a certain power station comprises the following detailed steps:
1. initializing a speed regulator hydraulic system controller, and acquiring rated pressure P set by a user through a man-machine interaction deviceForehead (forehead)Pressure P of starting and standby pumpsPrepare forThe corresponding pressurizing capacity information of the 4 pressurizing oil pumps is 0.1Mpa/min, 0.2Mpa/min, 0.3Mpa/min and 0.4 Mpa/min.
2. The speed regulator hydraulic system controller controls 4 pressurizing oil pumps to operate and load, and builds the pressure of the speed regulator hydraulic system to the rated pressure PForehead (forehead)Then, the operation of the 4 pressurized oil pumps was stopped.
3. The governor hydraulic system controller detects and collects governor hydraulic system pressure P1 and starts timing.
4. And (5) detecting whether the timing is finished for t minutes by a speed regulator hydraulic system controller, if so, entering the step 5, and otherwise, continuously monitoring.
5. The governor hydraulic system controller detects and collects governor hydraulic system pressure P2.
6. And the governor hydraulic system controller calculates the steady-state fixed consumption load P of the governor hydraulic system to be (P1-P2)/t.
7. If p is more than or equal to 0.1 and less than 0.2, starting a No. 1 oil pump or an air compressor as main pressurizing equipment to operate and load for a long time, and entering the step 10; if p is more than or equal to 0.2 and less than 0.3, starting a No. 2 oil pump or an air compressor as main pressurizing equipment to operate and load for a long time, and entering the step 10; if p is more than or equal to 0.3 and less than 0.4, starting a No. 3 oil pump or an air compressor as main pressurizing equipment to operate and load for a long time, and entering the step 10; otherwise, step 8 is entered.
8. If p is less than 0.1, starting the 1# pressurizing oil pump as the main pressurizing equipment for long-term operation and loading, and entering the step 10. Otherwise, step 9 is entered.
9. And starting the No. 3 pressurized oil pump as a main pressurizing device for long-term operation loading, and entering the step 10.
10. The governor hydraulic system controller collects pressure to maintain the system pressure P3 and begins timing.
11. And (5) detecting whether the timing is finished for t minutes by a speed regulator hydraulic system controller, if so, entering the step 5, and otherwise, continuously detecting.
12. The governor hydraulic system controller collects pressure to maintain the system pressure P4.
13. The governor hydraulic system controller calculates the pressure maintenance system random consumption load P' ═ P3-P4/t.
14. A set of pressurization capacities is generated from the pressurization capacities of the 3 constant-frequency oil pumps excluding the main pressurization device in the pressure maintenance device 4, and includes a single pressurization capacity, any 2 combined pressurization capacities (i.e., combined pressurization capacities in which any 2 pressurization devices are added together), and any 3 combined pressurization capacities, and includes
All the elements of the set are sorted from small to large, the sorting numbers are 1,2, … …, 6 and 7 in sequence, and the pressurizing capacity elements are p'm(1≤m≤7)，The pressing capacity element is associated with a pressing device which is pressed in conjunction therewith.
15. If p'i≤p’<p’jThen starting the pressuring capability element p'jThe associated oil pump pressurizing device is loaded as a backup pressurizing device and the operation proceeds to step 18. p'iAnd p'jThe elements in the pressurizing capacity set are sorted from small to large, and then the adjacent pressurizing capacity elements are arranged. Otherwise, step 16 is entered.
16. If p'<p’1Then starting the pressuring capability element p'1The associated oil pump pressurizing device is loaded as a backup pressurizing device and the operation proceeds to step 18. Otherwise, go to step 17.
17. And starting all oil pump pressurizing devices to act as standby pressurizing devices for loading operation, and entering the step 18.
18. If the pressure is maintained to be lower than the pressure P of the system starting pumpPrepare forAll the spare pressurizing equipment is started and loaded. And entering the step 19.
19. If the pressure maintains the system pressure not less than the rated system pressure PForehead (forehead)All the spare pressurizing equipment is unloaded and stopped. Step 20 is entered.
20. When the pressure of the pressure maintaining system is less than the pressure P of the starting pumpPrepare forAnd rated pressure PForehead (forehead)If not, returning to step 10, otherwise returning to step 18.
Claims (1)
1. An adaptive control method for a pressure maintenance system, comprising the steps of:
step 1, initializing a controller (6), and acquiring rated pressure P set by a user through a man-machine interaction device (7)Forehead (forehead)Starting up of the standby-equipment pressure PPrepare forThe pressurizing capacity information p1, p2, …, pn corresponding to n fixed frequency oil pumps or air compressors in the pressure maintaining equipment (4); p1 is not less than p2 is not less than … is not less than pn;
step 2, the controller (6) controls n oil pumps or air compressors to operate and load, and the pressure maintenance system is pressurized to the rated pressure PForehead (forehead)Then stopping the operation of the n oil pumps or the air compressors;
step 3, the controller (6) collects pressure to maintain the system pressure P1, and starts timing;
step 4, the controller (6) detects whether the timing is over t minutes, if yes, the step 5 is carried out, and if not, the detection is continued;
step 5, the controller (6) collects pressure to maintain the system pressure P2;
step 6, the controller (6) calculates the steady-state fixed consumption load P of the pressure maintenance system to be (P1-P2)/t;
step 7, if pi is less than or equal to p < pj, starting an i # oil pump or an air compressor as main pressurizing equipment to operate and load for a long time, and entering step 10; pi and pj are the information of the pressurization capacities of n fixed-frequency oil pumps or air compressors in the pressure maintenance equipment (4) in the sequence from small to large, and two adjacent corresponding equipment i # and j #; otherwise, entering step 8;
step 8, if p is less than p1, starting a 1# oil pump or air compressor as a main pressurizing device to operate and load for a long time, and entering step 10; otherwise, go to step 9;
step 9, starting an n # oil pump or an air compressor as main pressurizing equipment to operate and load for a long time, and entering step 10;
step 10, the controller (6) collects pressure to maintain system pressure P3, and starts timing;
step 11, the controller (6) detects whether the timing is over t minutes, if yes, the step 5 is carried out, and otherwise, the detection is continued;
step 12, collecting pressure maintaining system pressure P4 by a controller (6);
step 13, the controller (6) calculates the random consumption load P' ═ P3-P4)/t of the pressure maintenance system;
step 14, generating a pressurizing capacity set according to the pressurizing capacities of n-1 fixed-frequency oil pumps or air compressors after the main pressurizing equipment is removed from the pressure maintaining equipment (4), wherein the set comprises single pressurizing capacity, any 2 combined pressurizing capacities, namely the combined pressurizing capacity of any 2 pressurizing equipment which are added together, … … any n-2 combined pressurizing capacities and any n-1 combined pressurizing capacities, and the set comprises
An element of pressurizing abilityAll elements of the set are sorted from small to large, the sorting sequence numbers are 1,2, … …,
the pressuring ability elements are each p'm，
The pressurization capacity element is associated with the pressurization equipment which is correspondingly and jointly pressurized;
step 15, if p'i≤p’<p’jThen starting the pressuring capability element p'jThe associated oil pump or air compressor pressurizing equipment is loaded as standby pressurizing equipment in operation, and the step 18 is carried out; p'iAnd p'jAfter the elements in the pressurizing capacity set are sorted from small to large, the adjacent pressurizing capacity elements; otherwise, go to step 16;
step 16, if p'<p’1Then starting the pressuring capability element p'1The associated oil pump or air compressor pressurizing equipment is loaded as standby pressurizing equipment in operation, and the step 18 is carried out; otherwise, go to step 17;
step 17, starting all oil pump or air compressor pressurizing equipment to operate and load as standby pressurizing equipment, and entering step 18;
step 18, if the pressure of the pressure maintenance system is less than the pressure P of the standby equipmentPrepare forStarting and loading all standby pressurizing equipment; entering step 19;
step 19, if the pressure is maintained to be not less than the rated system pressure PForehead (forehead)Unloading and stopping all the standby pressurizing equipment; entering step 20;
step 20, when the pressure of the pressure maintaining system is less than the pressure P of the standby equipmentPrepare forAnd rated pressure PForehead (forehead)If not, returning to step 10, otherwise returning to step 18.
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| CN115949546A (en) * | 2023-01-17 | 2023-04-11 | 中国长江电力股份有限公司 | Speed regulator hydraulic control system comprising multiple pressure oil pumps and control method thereof |
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| CN115949546A (en) * | 2023-01-17 | 2023-04-11 | 中国长江电力股份有限公司 | Speed regulator hydraulic control system comprising multiple pressure oil pumps and control method thereof |
| CN115949546B (en) * | 2023-01-17 | 2024-03-29 | 中国长江电力股份有限公司 | Speed regulator hydraulic control system comprising multiple oil pumps and control method thereof |
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