CN108549420A - A kind of flow control methods and system for multiple row field devices - Google Patents
A kind of flow control methods and system for multiple row field devices Download PDFInfo
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- CN108549420A CN108549420A CN201810332694.7A CN201810332694A CN108549420A CN 108549420 A CN108549420 A CN 108549420A CN 201810332694 A CN201810332694 A CN 201810332694A CN 108549420 A CN108549420 A CN 108549420A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
Abstract
The invention discloses a kind of flow control methods and system for multiple row field devices, are related to petroleum technology field.This method includes：The first parameter preset in major loop is detected, the first detected value is obtained；Control calculation process is carried out according to the first detected value and preset value, obtains the first controlling value；The second parameter preset in n subloop is detected respectively, obtains n the second detected values；Control calculation process is carried out according to n the second detected values and the first controlling value respectively, obtains n the second controlling values；The flow of n subloop is controlled according to n the second controlling values respectively.The present invention realizes automatically controlling to the flow of multiple row field devices, avoid the uncertainty by operation human subjective's control and the property delayed, and when upstream, operating mode changes, the variation of the first parameter preset will be detected in major loop in time, it is adaptable, adjustment is timely, adjusts efficient.
Description
Technical field
The present invention relates to petroleum technology field more particularly to a kind of flow control methods for multiple row field devices and it is
System.
Background technology
With the Persisting exploitation construction in overseas large-scale high yield oil field, traditional single-row field devices cannot be satisfied processing capacity
Demand, the technologies for covering field devices paired runnings are able to large-scale application more.When more set field devices paired runnings, due to pipe
The reasons such as road frictional resistance cause the field devices having work excess load, some field devices work to owe negative it occur frequently that Biased flow phenomenon
Lotus.Currently used solution is the entrance setting manual modulation valve door in each column field devices, manually controls regulating valve
The aperture of door controls the flow of each row field devices, keeps the flow of each column field devices substantially balanced.
The flow that each row field devices are controlled by manually controlling the aperture of control valve, to the adjusting of flow entirely by behaviour
Make the feeling of personnel, and the increase and decrease of multiple row flow influences each other, the harmony of each column flow is very poor, is extremely difficult to balanced shape
State；Meanwhile when upstream operating mode changes, groping the fragile balance that adjustment reaches repeatedly in the past will be destroyed, bias current
Phenomenon is reappeared, it has to be readjusted, bad adaptability；Meanwhile it can only be until the manufacturing parameter being monitored be long when bias current generation
Between be in abnormal state when can just be found, if reaction not in time, the quality of product can be reduced；In addition, adjust manually
Method relies on operating personnel and gropes to adjust manually repeatedly to multiple control valves of multiple row field devices import, personnel labor intensity
Greatly, it is low to adjust efficiency.
Invention content
It is a kind of for multiple row field devices the technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide
Flow control methods and system.
The technical solution that the present invention solves above-mentioned technical problem is as follows：
A kind of flow control methods for multiple row field devices, the major loop of the multiple row field devices are returned with n pair
Road be connected to, n be integer and n >=2, including：
The first parameter preset in the major loop is detected, the first detected value is obtained；
Control calculation process is carried out according to first detected value and preset value, obtains the first controlling value；
The second parameter preset in the n subloops is detected respectively, obtains n the second detected values；
Control calculation process is carried out with first controlling value according to n second detected values respectively, obtains n second
Controlling value；
Respectively according to the flow of the n subloops of n the second controlling value control, make the stream of the n subloops
Measure equilibrium assignment；
Wherein, first parameter preset is the parameter that can influence all flows of the multiple row field devices, described
Second parameter preset is the parameter for the bias current degree that can indicate the multiple row field devices.
The beneficial effects of the invention are as follows：A kind of flow control methods for multiple row field devices provided by the invention lead to
It crosses and the first parameter preset in major loop is monitored, and accordingly generate the first controlling value, the control as itself and subloop
Standard is then sent to each subloop, so that subloop is respectively according to the first controlling value and the actual flow detected to pair
Flow in circuit is controlled, and is made the flow control of each subloop in balanced range, is realized and filled to multiple row oil field
The flow set automatically controls, and avoids the uncertainty by operation human subjective's control and the property delayed, and work as upstream work
When condition changes, the variation of the first parameter preset will be detected in major loop in time, adaptable, adjustment is timely, adjusts
It is efficient.
The another technical solution that the present invention solves above-mentioned technical problem is as follows：
A kind of flow control system for multiple row field devices, the major loop of the multiple row field devices are returned with n pair
Road be connected to, n be integer and n >=2, including：
Primary detector obtains the first detected value for being detected to the first parameter preset in the major loop；
Master controller obtains the first control for carrying out control calculation process according to first detected value and preset value
Value；
N secondary detector obtains second for being detected respectively to the second parameter preset in the n subloops
Detected value；
N submaster controller, for carrying out control operation with first controlling value according to n second detected values respectively
Processing obtains n the second controlling values；
N regulating valve, for according to the flow of the n subloops of n the second controlling value control, making n respectively
The flow equalization of the subloop distributes；
Wherein, first parameter preset is the parameter that can influence all flows of the multiple row field devices, described
Second parameter preset is the parameter for the bias current degree that can indicate the multiple row field devices.
The advantages of additional aspect of the invention, will be set forth in part in the description, and will partly become from the following description
It obtains obviously, or practice is recognized through the invention.
Description of the drawings
Fig. 1 is the flow signal that a kind of embodiment of flow control methods for multiple row field devices of the invention provides
Figure；
Fig. 2 is the structural framing that a kind of embodiment of flow control system for multiple row field devices of the invention provides
Figure.
Specific implementation mode
The principle and features of the present invention will be described below with reference to the accompanying drawings, and illustrated embodiment is served only for explaining the present invention,
It is not intended to limit the scope of the present invention.
As shown in Figure 1, for a kind of stream that provides of embodiment of flow control methods for multiple row field devices of the invention
Journey schematic diagram, the major loop of multiple row field devices are connected to n subloop, and n is integer and n >=2, and this method may include：
S1 is detected the first parameter preset in major loop, when the first parameter preset changes, obtains first
Detected value；
It should be noted that the first parameter preset is the parameter for the flow that can influence whole multiple row field devices, for example,
Can be the upstream liquid levels of multiple row field devices, multiple row field devices inlet flow etc., when these parameter changes, can influence
The flow of whole multiple row field devices illustrates the oil mass that will enter multiple row field devices for example, when upstream liquid level becomes larger
Become more, then the flow of multiple row field devices also can accordingly increase, changes the original balance of multiple row field devices, cause flow not
It is impartial.
It should be understood that when the first parameter preset is selected as upstream liquid level, it can be by liquid level detection device in multiple row oil
The predeterminated position of field device upstream detects liquid level, and liquid level detection device can be understood as in a preferred embodiment of major loop
Including device, its realization method of liquid level detection device is varied, and technology maturation, details are not described herein.
Since for multiple row field devices, major loop is located at the upstream of fluid, multiple row subloop is located under fluid
Trip, fluid will necessarily flow to subloop by major loop, although upstream liquid level still can be understood as major loop outside major loop
Upstream liquid level, the first parameter preset in major loop should not be narrowly interpreted as to the parameter of major loop internal oil, multiple row
Flow of field devices inlet etc. similarly, repeats no more.
It should be understood that for convenience of description when multiple row field devices are in non-equilibrium state, how the present invention realizes
Control, then when multiple row field devices are in equilibrium state, the meaning just not illustrated, then, the Implicit Conditions of this step
It is that current multiple row field devices are in non-equilibrium state or will be in non-equilibrium state, therefore, in this step, art technology
Personnel are appreciated that the first parameter preset is changed, and otherwise, this step is with regard to nonsensical, for example, it is default to work as first
When parameter is entrance flow, it is assumed that numerical value 100, multiple row field devices are in equilibrium state at this time, if the numerical value detected
Also it is 100, then unbalanced problem is not present, also there is no need to control, if the numerical value detected is 50, illustrates entrance
Flow is changed, and the equilibrium state of multiple row field devices will be destroyed, at this time, it may be necessary to be controlled to adjust.Namely
Say, the first detected value of the first parameter preset detected, it should be from it is different before.
S2 carries out control calculation process according to the first detected value and preset value, obtains the first controlling value；
Preferably, pid control algorithm can be used.
For ease of understanding, it is illustrated below with a simplified example, which uses for illustrative purposes only, does not represent practical feelings
Condition.
For example, when the first parameter preset is upstream liquid level, it is assumed that multiple row field devices share 1 major loop, are connected with 2
A subloop, when being in equilibrium state, upstream liquid level is 100, and the flow in corresponding two subloops is respectively 20 and 20, is showed
It is 200 in the first detected value detected, it is found that upstream liquid level increases one times, then after carrying out control calculation process, it is corresponding
Each subloop in need flow to be achieved respectively and be 40 and 40, here it is each subloops to need a flow to be achieved
Value, that is, the first controlling value.
As it can be seen that the first controlling value is after detecting that the first parameter preset changes, what each subloop should reach
First controlling value, it will be understood that reach the first controlling value for certain parameter of subloop.
Preferably, the application only accounts for that entire multiple row field devices is allowed to reach equilibrium state, i.e., whole subloops all reach
To same first controlling value, to those skilled in the art, can be changed for the first detected value according to actual demand
The algorithm that control calculation process is carried out with preset value, makes each subloop respectively reach the first different controlling values, to realize
Different process demands.
S3 is respectively detected the second parameter preset in n subloop, obtains n the second detected values；
It should be noted that the second parameter preset is the parameter for the bias current degree that can indicate multiple row field devices.For example,
The inlet flow rate of each column field devices entrance flows into the fluid total amount etc. of each column field devices in the unit interval.For example, when the
When two parameter presets are the inlet flow rate of each column field devices entrance, it is assumed that the inlet flow rate of each column field devices entrance is all
It is identical, then illustrate that the multiple row field devices are in equilibrium state, the case where bias current is not present, but when each column field devices into
When inlet flow rate at mouthful differs, the oil mass that each column field devices are entered in the unit interval is just different, and there have been bias currents
Situation flows into each column so the inlet flow rate of each column field devices entrance can be used as the second parameter preset in the unit interval
Similarly, details are not described herein for fluid total amount of field devices etc..
May also be different it should be understood that the real time value possibility of the second parameter preset in each subloop is identical, work as difference
When, the second detected value detected may need to control on the standard reached, it is also possible to need to control the standard reached
Under, at this time, it is necessary to which according to actual conditions, each subloop individually controls, and will be arranged in subloop for controlling flow
Regulating valve increase or reduce, so that the second parameter preset of subloop is reached the first controlling value.
For example, when the second parameter preset in each subloop is the inlet flow rate of each column field devices entrance, it is false
If the first controlling value is 100, i.e., the inlet flow rate in each subloop needs to reach 100, wherein subloop A is detected in real time
The second detected value be 50, the second detected value that subloop B is detected in real time is 150, then just explanation needs subloop A
Increase inlet flow rate, reaches 100；For subloop B, it is desirable to reduce inlet flow rate reaches 100.
S4 carries out control calculation process according to n the second detected values and the first controlling value respectively, obtains n second control
Value；
Preferably, pid control algorithm can be used.
It should be noted that the second detected value due to each subloop may be not quite similar, then the second obtained control
Value processed is also not quite similar, and each subloop can independently control the flow in circuit according to the second controlling value, make it
Reach the first controlling value.
For ease of understanding, it is illustrated below with a simplified example, which uses for illustrative purposes only, does not represent practical feelings
Condition.
For example, when the first controlling value is 100, i.e., the inlet flow rate in each subloop needs to reach 100, wherein secondary
The second detected value that circuit A is detected in real time is 50, and the second detected value that subloop B is detected in real time is 150, then being controlled
After calculation process processed, it is found that subloop A needs increase by 50, subloop B to need reduction 50, here it is the second obtained controlling values.
S5 controls the flow of n subloop according to n the second controlling values respectively, makes the flow equalization point of n subloop
Match；
It should be noted that regulating valve can be arranged in the entrance of each column field devices, by controlling to adjust valve, adjust
The flow of each subloop.
Flow equalization distribution refers to occur a kind of state of bias current situation, it can be understood as in each row field devices
The flow that can meet in its work requirements or each row field devices of the flow during flow is identical or each row field devices do not have
There is excess load etc..
It should be understood that since control program is relative complex, need to make a response in a short time to measured variable variation, control system
Working frequency of uniting is higher, computationally intensive, can be realized by Distributed Control System.
A kind of flow control methods for multiple row field devices provided in this embodiment, by first in major loop
Parameter preset is monitored, and accordingly generates the first controlling value, as the control standard of itself and subloop, is then sent to each
Subloop, so that subloop respectively controls the flow in subloop according to the first controlling value and the actual flow detected
System makes the flow control of each subloop in balanced range, realizes automatically controlling to the flow of multiple row field devices,
The uncertainty by operation human subjective's control and the property delayed are avoided, and when upstream operating mode changes, major loop
In will detect the variation of the first parameter preset in time, adaptable, adjustment is timely, adjusts efficient.
Optionally, in some embodiments, control calculation process is carried out according to the first detected value and preset value, obtains first
Controlling value can specifically include：
First detected value is compared with preset value, obtains the first deviation；
Control operation is carried out to the first deviation, obtains the first controlling value.
It should be noted that preset value refers to reference of first parameter preset under multiple row field devices equilibrium state
Value.For example, it is assumed that the first parameter preset is upstream liquid level, then when multiple row field devices in the state of the equilibrium when upstream liquid level
Numerical value is 100, then 100 can serve as preset value.
It should be understood that deviation can there are many computational methods, for example, the first detected value and preset value can be made it is poor, by
The absolute value of obtained numerical value is as the first deviation；In another example can also the first detected value and preset value be made quotient, will obtain
Numerical value absolute value as the first deviation.
Optionally, in some embodiments, it is carried out at control operation according to n the second detected values and the first controlling value respectively
Reason obtains n the second controlling values, can specifically include：
N the second detected values are compared with the first controlling value respectively, obtain n the second deviations；
Control operation is carried out to n the second deviations respectively, obtains the second controlling value.
It should be understood that deviation can be there are many computational methods, for example, can make the second detected value and the first controlling value
Difference, using the absolute value of obtained numerical value as the second deviation；In another example the second detected value and the first controlling value can also be made
Quotient, using the absolute value of obtained numerical value as the second deviation.
Optionally, in some embodiments, the flow for controlling n subloop according to n the second controlling values respectively, makes n
The flow equalization of subloop distributes, and can specifically include：
The flow of n subloop is controlled according to n the second controlling values respectively；
The flow of n subloop is detected respectively, obtains n flow value；
N flow value and the first controlling value are subjected to control calculation process respectively, obtain n third controlling value；
Whether within a preset range n third controlling value is judged respectively, if it is, finishing control, if it is not, then repeating
The step of above-mentioned flow to n subloop is controlled, detected and judged obtained controlling value is executed, until obtaining
Whole controlling values within a preset range, i.e., the flow equalization distribution of n subloop.
It should be noted that the process that n flow value carries out control calculation process with the first controlling value can also be calculated first
Deviation, then control calculation process is carried out, process is referred to the control calculation process process in above-described embodiment, herein not
It repeats again.
By feeding back the flow after variation, it is compared herein with the second controlling value and carries out control operation, shape
It is adjusted repeatedly at negative feedback closed loop, until detection flows infinite approach two level setting value, can improve the precision of control.
Optionally, in some embodiments, the first parameter preset is liquid of the liquid in predetermined position for flowing into major loop
Position, the second parameter preset are the flow for the liquid for flowing into subloop.
As shown in Fig. 2, for a kind of knot that provides of embodiment of flow control system for multiple row field devices of the invention
Structure frame diagram, the major loop of multiple row field devices are connected to n subloop, and n is integer and n >=2, which is characterized in that the system
May include：
Primary detector 1 obtains the first detected value for being detected to the first parameter preset in major loop；
Master controller 2 obtains the first controlling value for carrying out control calculation process according to the first detected value and preset value；
N secondary detector 3 obtains the second detection for being detected respectively to the second parameter preset in n subloop
Value；
N submaster controller 4 is obtained for carrying out control calculation process according to n the second detected values and the first controlling value respectively
To n the second controlling values；
N regulating valve 5, the flow for controlling n subloop according to n the second controlling values respectively make n subloop
Flow equalization distributes；
Wherein, the first parameter preset is the parameter for the flow that can influence whole multiple row field devices, the second parameter preset
For can indicate multiple row field devices bias current degree parameter.
It should be noted that the position for needing to detect in pipeline road can be arranged in primary detector 1, master controller 2 can
To be arranged in the major loop of pipeline road upstream, n secondary detector 3 and n submaster controller 4 can be respectively correspondingly arranged
In the n subloop in pipeline road downstream, respectively correspondingly it is connect with n regulating valve 5, regulating valve 5 can be arranged in petroleum pipeline
In road, the flow of fluid is controlled.
A kind of flow control system for multiple row field devices provided in this embodiment, by primary detector 1 to leading back
The first parameter preset in road is monitored, and generates the first controlling value accordingly by master controller 2, as itself and subloop
Control standard is then sent to each subloop, so that subloop is respectively according to the first controlling value and the actual flow detected
Flow in subloop is controlled, makes the flow control of each subloop in balanced range, is realized to multiple row oil
The flow of field device automatically controls, and avoids the uncertainty by operation human subjective's control and the property delayed, and when upper
When trip operating mode changes, the variation of the first parameter preset will be detected in major loop in time, adaptable, adjustment is timely,
It adjusts efficient.
Optionally, in some embodiments, master controller 2 is specifically used for the first detected value being compared with preset value,
The first deviation is obtained, control operation is carried out to the first deviation, obtains the first controlling value.
Optionally, in some embodiments, n submaster controller 4 is specifically used for n the second detected values and the first control respectively
Value processed is compared, and obtains n the second deviations, is carried out control operation to n the second deviations respectively, is obtained the second control
Value.
Optionally, in some embodiments, n regulating valve 5 is specifically used for respectively according to n the second controlling value controls n
The flow of subloop；
N secondary detector 3 is additionally operable to respectively be detected the flow of n subloop, obtains n flow value；
N submaster controller 4 is additionally operable to that n flow value and the first controlling value are carried out control calculation process respectively, obtains n
Third controlling value, and whether within a preset range n third controlling value is judged respectively, if it is, finishing control, if not,
N regulating valve 5, the function of n secondary detector 3 and n submaster controller 4 are then repeated, until obtained whole controlling values exist
In preset range, i.e., the flow equalization distribution of n subloop.
Optionally, in some embodiments, the first parameter preset is liquid of the liquid in predetermined position for flowing into major loop
Position, the second parameter preset are the flow for the liquid for flowing into subloop.
Reader should be understood that in the description of this specification reference term " one embodiment ", " is shown " some embodiments "
The description of example ", " specific example " or " some examples " etc. mean specific features described in conjunction with this embodiment or example, structure,
Material or feature are included at least one embodiment or example of the invention.In the present specification, above-mentioned term is shown
The statement of meaning property need not be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described
It may be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this
The technical staff in field can be by the spy of different embodiments or examples described in this specification and different embodiments or examples
Sign is combined.
It is apparent to those skilled in the art that for convenience of description and succinctly, the dress of foregoing description
The specific work process with unit is set, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
In several embodiments provided herein, it should be understood that disclosed device and method can pass through it
Its mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of unit, only
A kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or component can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.
The unit illustrated as separating component may or may not be physically separated, and be shown as unit
Component may or may not be physical unit, you can be located at a place, or may be distributed over multiple networks
On unit.Some or all of unit therein can be selected according to the actual needs to realize the mesh of the embodiment of the present invention
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
It is that each unit physically exists alone, can also be during two or more units are integrated in one unit.It is above-mentioned integrated
The form that hardware had both may be used in unit is realized, can also be realized in the form of SFU software functional unit.
It, can if integrated unit is realized in the form of SFU software functional unit and when sold or used as an independent product
To be stored in a computer read/write memory medium.Based on this understanding, technical scheme of the present invention substantially or
Say that all or part of the part that contributes to existing technology or the technical solution can embody in the form of software products
Out, which is stored in a storage medium, including some instructions are used so that a computer equipment
(can be personal computer, server or the network equipment etc.) executes all or part of each embodiment method of the present invention
Step.And storage medium above-mentioned includes：USB flash disk, read-only memory (ROM, Read-OnlyMemory), is deposited mobile hard disk at random
The various media that can store program code such as access to memory (RAM, RandomAccessMemory), magnetic disc or CD.
More than, specific implementation mode only of the invention, but scope of protection of the present invention is not limited thereto, and it is any to be familiar with
Those skilled in the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or substitutions,
These modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be wanted with right
Subject to the protection domain asked.
Claims (10)
1. a kind of flow control methods for multiple row field devices, major loop and the n subloop of the multiple row field devices
Connection, n are integer and n >=2, which is characterized in that including：
The first parameter preset in the major loop is detected, the first detected value is obtained；
Control calculation process is carried out according to first detected value and preset value, obtains the first controlling value；
The second parameter preset in the n subloops is detected respectively, obtains n the second detected values；
Control calculation process is carried out with first controlling value according to n second detected values respectively, obtains n second control
Value；
Respectively according to the flow of the n subloops of n the second controlling value control, keep the flow of the n subloops equal
Weighing apparatus distribution；
Wherein, first parameter preset is the parameter that can influence all flows of the multiple row field devices, described second
Parameter preset is the parameter for the bias current degree that can indicate the multiple row field devices.
2. flow control methods according to claim 1, which is characterized in that described according to first detected value and default
Value carries out control calculation process, obtains the first controlling value, specifically includes：
First detected value is compared with preset value, obtains the first deviation；
Control operation is carried out to first deviation, obtains the first controlling value.
3. flow control methods according to claim 1, which is characterized in that described respectively according to n second detections
Value carries out control calculation process with first controlling value, obtains n the second controlling values, specifically includes：
N second detected values are compared with first controlling value respectively, obtain n the second deviations；
Control operation is carried out to n second deviations respectively, obtains the second controlling value.
4. flow control methods according to any one of claim 1 to 3, which is characterized in that described respectively according to n institute
The flow for stating the second controlling value n subloops of control makes the flow equalization distribution of the n subloops, specifically includes：
Respectively according to the flow of the n subloops of n the second controlling value control；
The flow of the n subloops is detected respectively, obtains n flow value；
The n flow values are subjected to control calculation process with first controlling value respectively, obtain n third controlling value；
Whether within a preset range the n third controlling values are judged respectively, if it is, finishing control, if it is not, then repeating
The step of above-mentioned flow to the n subloops is controlled, detected and judged obtained controlling value is executed, until
Within a preset range, i.e. the flow equalization of the n subloops distributes obtained whole controlling values.
5. flow control methods according to any one of claim 1 to 3, which is characterized in that first parameter preset
To flow into the liquid of the major loop in the liquid level of predetermined position, second parameter preset is the liquid for flowing into the subloop
The flow of body.
6. a kind of flow control system for multiple row field devices, major loop and the n subloop of the multiple row field devices
Connection, n are integer and n >=2, which is characterized in that including：
Primary detector obtains the first detected value for being detected to the first parameter preset in the major loop；
Master controller obtains the first controlling value for carrying out control calculation process according to first detected value and preset value；
N secondary detector obtains the second detection for being detected respectively to the second parameter preset in the n subloops
Value；
N submaster controller, for being carried out at control operation according to n second detected values and first controlling value respectively
Reason obtains n the second controlling values；
N regulating valve, for according to the flow of the n subloops of n the second controlling value control, keeping n a described respectively
The flow equalization of subloop distributes；
Wherein, first parameter preset is the parameter that can influence all flows of the multiple row field devices, described second
Parameter preset is the parameter for the bias current degree that can indicate the multiple row field devices.
7. flow control system according to claim 6, which is characterized in that the master controller is specifically used for described the
One detected value is compared with preset value, obtains the first deviation, is carried out control operation to first deviation, is obtained first
Controlling value.
8. flow control system according to claim 6, which is characterized in that the n submaster controllers are specifically used for difference
N second detected values are compared with first controlling value, obtain n the second deviations, respectively a to n described the
Two deviations carry out control operation, obtain the second controlling value.
9. the flow control system according to any one of claim 6 to 8, which is characterized in that the n regulating valves are specific
For respectively according to the flow of the n subloops of n the second controlling value control；
The n secondary detectors are additionally operable to respectively be detected the flow of the n subloops, obtain n flow value；
The n submaster controllers are additionally operable to that the n flow values are carried out control calculation process with first controlling value respectively,
N third controlling value is obtained, and whether within a preset range to judge the n third controlling values respectively, if it is, terminating control
System, if it is not, then the n regulating valves, the function of the n pair detectors and a submaster controllers of n are repeated, until
Within a preset range, i.e. the flow equalization of the n subloops distributes obtained whole controlling values.
10. the flow control system according to any one of claim 6 to 8, which is characterized in that first parameter preset
To flow into the liquid of the major loop in the liquid level of predetermined position, second parameter preset is the liquid for flowing into the subloop
The flow of body.
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