CN106523330B - A kind of multisystem air compression station compressed air is incorporated into the power networks pressure difference compensation control method - Google Patents
A kind of multisystem air compression station compressed air is incorporated into the power networks pressure difference compensation control method Download PDFInfo
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Abstract
It is incorporated into the power networks pressure difference compensation control method the present invention relates to a kind of multisystem air compression station compressed air, the minimum supply gas pressure that user under each list air-compressor set system needs is consistent, the multisystem includes multiple single air-compressor set systems, and the method includes the steps as follows: air-compressor set system standard pressure setting: the grid-connected position of two, multisystem air-compressor sets determines；Three, detect respective system pipe network actual pressure；Four, system pressure differences calculate；The grid-connected pressure difference adjustment of five,；Six, multisystem operating pressure alarm settings, if no pressure is alarmed, then compensating control terminates；If any pressure alarm, then release it is grid-connected, seven, compressed airs be incorporated into the power networks pressure difference compensation control adjustment operate normally.According to the present invention, on the basis of ensuring stability of grid connection operation, aperture piecewise function is controlled when grid-connected using regulating valve, is interfered between reduction system, guarantees the grid-connected pressure smooth transition in the process of multisystem.
Description
Technical field
The present invention relates to the pressure difference automatic control technologys of air compressor station.In particular it relates to which a kind of system is empty
Pressure station compressed air is incorporated into the power networks pressure difference compensation control method, according to this method, in the grid-connected fortune of multisystem air compression station compressed air
When row, pressure difference compensation control is carried out to each single air-compressor set system, guarantees pressure smooth transition when multiple system grid connections, effectively
The service efficiency for improving air compressor machine, realizes most economical operational mode.
Background technique
Air compressor station in actual operation, when air compressor machine underrun, reaches as gas storage pressure inside the tank rises
Pressure is set, needs to adjust ductwork pressure.
There are mainly three types of existing most widely used technologies:
The first is the automatic Unloading Technology of air compressor machine, it automatically disengages air compressor machine main motor with compression section, therefore, this
When air compressor machine do not generate compressed gas, motor is in no-load running, and power consumption is about the 10% left of Rated motor operation
The electric energy on the right side, this part is actually gratuitously consumed.
It is for second air compressor machine superpressure interlocking start and stop Electrical Control Technology, this technology is larger in load variations and air accumulator
In the lesser situation of capacity, it will cause the frequent start-stop of motor.Since the No Load Start electric current of air compressor machine is about specified
5~7 times of electric current, larger to power grid and the impact of other electrical equipments, power consumption is larger, meanwhile, the motor of air compressor machine uses
Service life can also shorten.
The third is to guarantee that the outlet pressure of single air compressor machine is steady state value using constant pressure frequency conversion control technology, automatic to adjust
Save the output power of motor.
In the case where having different pressure levels in pipe network, the production atmospheric pressure of air compressor machine cannot be with the requirement with gas load
Change and be adjusted automatically, existing method often using the pressure rating for improving whole pipeline, is supplied low using decompressor
Gas equipment is pressed, to cause energy waste.
For this purpose, during combining live practice, how more effectively to improve air compressor machine service efficiency just seem compared with
It is important.For example, how to realize the most economical method of operation in multiple air-compressor set operational process according to the present invention
(some air compressor machines may work in throttling band, and intake valve does not have standard-sized sheet or by-passing valve open state, if multisystem exists
It is very considerable then to waste energy for such situation) seem more important.
By being retrieved to (air compressor machine OR air compressor) the AND pressure being related to, it is thus understood that the correlation being related at present
Patented technology is as follows:
Application No. is " CN200710114501.2 ", entitled " air compressor pressure automatic control devices "
In technical solution, a kind of air compressor pressure automatic control device is disclosed, it includes gas pressure in measurement air compressor
The electro connecting pressure gauge of power variation and output pressure electric signal, the control circuit being electrically connected with the electro connecting pressure gauge and by institute
State the air compressor motor of control circuit control.Staff is guaranteeing air compression according to the size of sizing production requirement pressure
In machine design safety claimed range, the compressed air of maximum value is obtained, and according to the maximum value of acquisition, freely adjusts electric contact pressure
Power list index adjusts the pressure difference between the compressed air upper and lower limit to greatest extent, to obtain corresponding air pressure value,
To reach following purposes: reducing electric motor starting number, extend motor service life, using electricity wisely reduces production cost, improves
The quality of production efficiency and sizing semi-finished product.
According to application No. is " CN200610146203.7 ", entitled " a kind of air compressor and control method " to take off
The technical solution shown, the program are related to a kind of air compressor structure automatically controlled with pressure, are compressed by motor, air
Machine, air accumulator, controller are constituted, and tee tube, three ports difference of tee tube are arranged on the compressed air inlet pipe of air accumulator
Couple off-load valve outlet, pressure sensor, air accumulator；Off-load valve inlet couples air compressor compressed air outlet pipe；Pressure
Cell pressure signal output end Articulation Controller.Since the technology has used unloading valve, air compressor can be made to export
It is started under normal pressure, reduces the starting current of motor and the starting-impact power of compressor；And it can set in the larger context
Fixed or adjustment pressure, and then by output pressure control in a true scope near the setting value, and pressure control is steady
It is fixed, intuitive, its energy consumption is low, energy-saving effect is good.
Application No. is the skills of " CN92105586.2 ", entitled " constant pressure variable control system for fully automatic air compression station "
In art scheme, a kind of fully-automatic constant pressure variable automatic control system of air compressor station is disclosed, using pressure sensor, one
Programmable controller (or PLC machine), a variable-frequency governor to more air compressors cyclically realize band carry soft start and
Speed regulating control.Overcome that multiple compressors in the prior art (or pump) only make to assist open, the control of guard's valve, cannot continuously adjust
Section, can not achieve the soft start of multiple air compressors, causes to generate the shortcomings that impacting to power grid, to supply gas pressure, improves gas supply
Stability.
However, above-mentioned conventional art scheme there are the problem of or defect be: in the grid-connected fortune of multisystem air compression station compressed air
When row, it is difficult to pressure difference compensation control is carried out to each single air-compressor set system, thus, it is difficult to guarantee that pressure is flat when multiple system grid connections
Steady transition, while mutual air demand compensation can not be carried out with the variation of gas load according to each system is different, in multiple skies
It presses in unit running process, more effectively improves the service efficiency of air compressor machine, realize most economical operational mode.
Summary of the invention
The technical program proposes the grid-connected fortune of most economical multisystem in multiple air-compressor sets simultaneously operational process
How row, i.e., in multiple air-compressor sets at the same time operational process, accomplish complementation, for the purpose of least air compressor machine investment, protects
The operation to a system in a best mode is demonstrate,proved, but at the scene during practice since each independent system has difference
Operating status when, the certain pressure difference of physical presence, the safe and stable control of system when how to realize multiple system grid connections
Just seem more important, the technical program combines multiple systems under different use backgrounds, during grid-connected with safety, surely
For the purpose of fixed pressure difference compensation control, on the basis of ensuring stability of grid connection operation, aperture is segmented when grid-connected using regulating valve
Function controls, and interferes between reduction system, guarantees pressure smooth transition when multisystem is grid-connected.
In order to overcome the problems referred above, present invention aims at: provide a kind of control of multisystem air compression station compressed air pressure difference
Method, a kind of multisystem air compression station compressed air according to the present invention are incorporated into the power networks pressure difference compensation control method, in multisystem sky
When pressure station compressed air is incorporated into the power networks, pressure difference compensation control can be carried out to each single air-compressor set system, thus, it is ensured that multiple systems
Pressure smooth transition when uniting grid-connected, while mutual air demand compensation is carried out with the variation of gas load according to each system is different,
Realize most economical operational mode.
A kind of multisystem air compression station compressed air according to the present invention is incorporated into the power networks pressure difference compensation control method, multiple grid-connected
After the multisystem air-compressor set of system unit composition is grid-connected, all regulating valves are standard-sized sheets, the system pressure of each list air-compressor set
Power is consistent substantially.It can achieve the purpose for opening air compressor machine less after grid-connected, energy conservation.
A kind of multisystem air compression station compressed air according to the present invention is incorporated into the power networks pressure difference compensation control method, according to grid-connected
Pressure difference before system unit (two systems are grid-connected) is grid-connected determines the opening speed of regulating valve.Pressure difference minor valve opening speed
Fastly, conversely, the big valve opening speed of pressure difference is slow, guarantee that system is steadily excessive.
A kind of multisystem air compression station compressed air of the invention be incorporated into the power networks pressure difference compensation control method concrete scheme such as
Under:
A kind of multisystem air compression station compressed air is incorporated into the power networks pressure difference compensation control method, each air compression station being incorporated into the power networks,
The minimum supply gas pressure that user under i.e. single air-compressor set system needs is consistent, and the multisystem air compression station includes n+1 pneumatics
It stands, i.e. list air-compressor set system, the n+1 air compression station, i.e., single air-compressor set system at least constitutes n grid-connected system unit,
It is characterized in that, being directed to each grid-connected system unit, the method includes the steps as follows:
Each single air-compressor set system standard pressure setting of one,；
The grid-connected position of two, multisystem air-compressor sets determines；
Each single air-compressor set system pipe network actual pressure of three, detection, and it is uploaded to computer control managing center (PLC)；
Each single air-compressor set system pressure difference of four, calculates, i.e., because each single air-compressor set system is to meet needed for itself is operated to press
Power and existing mutual difference；
The grid-connected pressure difference adjustment of five, multisystem air-compressor sets, that is, single air-compressor set system safety pressure margin is adjusted to its own
Pressure is still unsatisfactory for other single air-compressor set systems of pressure needed for operating itself, to reach energy-efficient purpose；
Six, multisystem list air-compressor set operating pressure alarm settings, it may be assumed that for each its own pressure of single air-compressor set system
The minimal pressure masterpiece alarm settings of the unit user requirement can be met；
If no pressure is alarmed, then grid-connected compensation control terminates, and enters step seven, operates normally under multisystem grid connection state；
If any pressure alarm, then enter troubleshooting or cut off grid-connected, separation system, compressed air be incorporated into the power networks pressure difference benefit
Control adjustment is repaid to operate normally；
Seven, compensation control terminates, and operates normally under multisystem grid connection state.
According to the present invention, in step 1, each list air-compressor set system standard pressure setting, each air-compressor set system satisfaction is originally
Pressure needed for body operates, can be different, has differences, typically larger than 6KG, upper limit no requirement (NR) is generally in 13KG hereinafter, excessively high
Pressure will lead to unnecessary waste.For the requirement for guaranteeing user terminal work system, established standards are needed for single air-compressor set
Operating pressure meets use throughput, the pressure demand of user by putting into the air compressor machine of different number.
According to the present invention, it is calculated in each single air-compressor set system pressure difference of step 4, is because related to the technical solution of the present invention
Multiple systems, then different systems has certain pressure difference, each air-compressor set system is to meet itself to operate required pressure
Existing difference.
Each air-compressor set system, which meets, itself operates required pressure, can be different, has differences, typically larger than 6KG, on
No requirement (NR) is limited generally in 13KG hereinafter, excessively high pressure will lead to unnecessary waste.
A kind of multisystem air compression station compressed air is incorporated into the power networks pressure difference compensation control method according to the present invention, the n+
1 air compression station, i.e., single air-compressor set system at least constitute n grid-connected system unit.
A kind of multisystem air compression station compressed air is incorporated into the power networks pressure difference compensation control method according to the present invention, feature
It is, in step 4, carries out grid-connected system unit pressure difference and calculate,
P=| Pi-Pj|
Wherein: P is different pipe network pressure differences (KPa)
Pi: the pressure (KPa) of n-th of one side system of regulating valve
Pj: the pressure (KPa) of another side system of n-th of regulating valve.
A kind of multisystem air compression station compressed air is incorporated into the power networks pressure difference compensation control method according to the present invention, feature
It is,
In step 5, grid-connected pressure difference adjustment is carried out, the pressure that the actual working pressure of the multisystem air compression station is differently formed
Difference carries out control compensation so that multisystem air compression station it is grid-connected it is steady after, the actual pressure of the multisystem air compression station is consistent, described
The regulating valve and stop valve standard-sized sheet of multisystem air compression station.
According to the present invention, regulating valve is adjustable aperture, is mainly used to control compressed air pressure and flow.Stop valve
Two states are only switched, mainly pressure is abnormal decline when multisystem is grid-connected, closes valve, releases rapidly grid-connected, and separation is more
System prevents failure propagation.It the use of stop valve is still to increase excision rapidly simultaneously when regulating valve is likewise supplied with cutting function
The reliability of net.Single air-compressor set system of separating abnormality, guarantees that other units are normal.A usual single air-compressor set be responsible for
One factory or a production line gas supply, being rapidly separated failure unit can prevent from influencing other factories or production line normal operation.
A kind of multisystem air compression station compressed air is incorporated into the power networks pressure difference compensation control method according to the present invention, feature
Be, in step 5, using regulating valve to the system for requiring supplementation with pressure, i.e., the compressed air of each single air-compressor set system and
Network pressure power is adjusted,
Adjusting method is as follows:
Regulating valve functional relation of aperture y and time t when initial grid-connected meets following formula:
In formula,
I and j: respectively representing n-th of regulating valve two sides System Number,
Pi and Pj: respectively representing the actual pressure of n-th of regulating valve, two side system,
N: n-th grid-connected system unit,
yn: the given aperture (0~100%) of the regulating valve of n-th of grid-connected system unit,
an: the regulating valve y of n-th of grid-connected system unitnTotal travel setting time, i.e. regulating valve ynIt is complete to open required time,
(s),
bn: maximum pressure differential (KPa) when two systems work independently in n-th of grid-connected system unit,
T: the opening time (s) of different moments after the grid-connected beginning of single air compressor machine regulating valve, by the way that time value is substituted into
Formula is stated, obtains the aperture of different moments lower valve.
By three systems (in a manner of two right figures) citing:
When first grid-connected system unit is grid-connected, n=1 is taken,
In formula, y1 is that the 1st regulating valve gives aperture (0~100%),
In application conditionsIn " 100 " indicate valve maximum opening,
Different moments after t time (s) grid-connected beginning (0s, 1s, 2s ...)
A1 indicates regulating valve y1 total travel setting time (s), according to single pneumatics in (before grid-connected) single air-compressor set system
The adjustment time T of machine is determining, a1=T.
The determination method of T:
The control target of separate unit air compressor machine is single machine pressure, and control object is intake valve and by-passing valve.It is exported by detection
Pressure and set pressure differential value control intake valve and bypass valve opening.Separate unit air compressor machine starting after, from unloaded state under load machine
Device indicates intake valve and by-passing valve coordinated control together to the adjustment time T, T that the time operated at full capacity is exactly single air compressor machine
The adjustment time of pressure.
B1 indicates maximum pressure differential (KPa) when two systems work independently in grid-connected system unit, according to two air compression stations
Actual maximum pressure difference is determining, b1Determination method: grid-connected the first two list air-compressor set system actual pressure is poor, is maximized.
A kind of multisystem air compression station compressed air is incorporated into the power networks pressure difference compensation control method according to the present invention, uses n
When a grid-connected system unit, n regulating valve is used,
N=1 is taken, first grid-connected system unit obtains the 1st regulating valve control function, and first regulating valve both sides is
P1/p2 two systems,
N=2 is taken again, and second grid-connected system unit obtains the 2nd regulating valve control function, and second regulating valve both sides is
P2/p3 two systems,
When grid-connected more than the multisystem of n=2, regulating valve control function is still successively obtained by above-mentioned steps.
When three system grid connection (two right figures of mode), 2 grid-connected system units are converted into, 2 regulating valves are used.First
A regulating valve both sides are p1/p2 two systems, and second regulating valve both sides is p2/p3 two systems.
N=1 is taken, first grid-connected system unit obtains the 1st regulating valve control function.
N=2 is taken again, and second grid-connected system unit obtains the 2nd regulating valve control function.
When multisystem is grid-connected, regulating valve control function is still successively obtained by above-mentioned steps.
According to the present invention, in step 5, grid-connected pressure difference adjustment, i.e. Isobarically Control are carried out.
When multisystem air compression station starts grid-connected, system shock is influenced in order to reduce grid-connected rear different pipe network flows mutation,
For different grid-connected pressure, control strategy is provided:
Multisystem is changing into several grid-connected system units to be controlled.Grid-connected system unit refers to that 2 air compression stations connect
The system connect.Such as mode once, two and three structure simplify delete individual air compression stations after can obtain grid-connected system unit.
For first grid-connected system unit, the 1st regulating valve control function is obtained.
Second grid-connected system unit obtains the 2nd regulating valve control function.
......
N regulating valve control function is successively obtained by above-mentioned steps.Multisystem is converted into n grid-connected system unit and is controlled
System.
When grid-connected work, the pressure difference being differently formed with regard to the actual working pressure of the multisystem air compression station carries out control benefit
Repay so that multisystem air compression station it is grid-connected it is steady after, the actual pressure of the multisystem air compression station is almost the same, so that the polyphyly
Unite air compression station regulating valve and stop valve standard-sized sheet this be the adjustment of grid-connected pressure difference as a result, being simultaneously also grid-connected necessary.
When being converted into n grid-connected system unit to multisystem and controlling, using regulating valve to grid-connected system unit simultaneously
Network pressure power is adjusted.
A kind of multisystem air compression station compressed air is incorporated into the power networks pressure difference compensation control method according to the present invention, is applying
ConditionIn " 100 " indicate valve maximum opening 100%,
If valve opening is with angle: 0 to 90 degree indicate,
Then above-mentioned application conditions become2. formula becomes
According to the present invention, the minimum supply gas pressure that the user under each single air-compressor set system needs should be consistent, using institute
State control connect-in strategy.
According to the present invention, the pressure difference according to grid-connected system unit (two systems are grid-connected) before grid-connected determines beating for regulating valve
Open speed.Pressure difference minor valve opening speed is fast, conversely, the big valve opening speed of pressure difference is slow, guarantees that system is steadily excessive.
According to the present invention, after the multisystem air-compressor set of multiple grid-connected system unit compositions is grid-connected, all regulating valves are complete
It opens, the system pressure of each list air-compressor set is consistent substantially.It can achieve the purpose for opening air compressor machine less after grid-connected, save
Energy.
A kind of multisystem air compression station compressed air is incorporated into the power networks pressure difference compensation control method according to the present invention, feature
It is, when three system grid connection (n=3, two right figures of mode), is converted into 2 grid-connected system units, to use 2 regulating valves,
One regulating valve both sides is p1/p2 two systems, and second regulating valve both sides is p2/p3 two systems,
N=1 is taken, first grid-connected system unit obtains the 1st regulating valve control function,
N=2 is taken again, second grid-connected system unit obtains the 2nd regulating valve control function,
When grid-connected more than the multisystem of n=2, regulating valve control function is still successively obtained by above-mentioned steps.
A kind of multisystem air compression station compressed air is incorporated into the power networks pressure difference compensation control method according to the present invention, feature
It is, in step 6, after grid-connected, setting multisystem low-pressure alarm, i.e., for each single air-compressor set default low-pressure alarm
When alarming, start spare air compressor machine.
A kind of multisystem air compression station compressed air is incorporated into the power networks pressure difference compensation control method according to the present invention, multisystem
Low-pressure alarm point is realized in each single air-compressor set system, is only alarmed in single air-compressor set default low-pressure.
In step 6, after grid-connected, when respective system is alarmed, start spare air compressor machine, because user's gas consumption increases
Or operation mechanical disorder, can reduce multisystem it is grid-connected after pressure, pressure reach multisystem low-pressure alarming value after, start it is standby
System pressure can be improved with air compressor machine.The quantity and place for starting spare air compressor machine are judged and are executed by operator.
A kind of multisystem air compression station compressed air is incorporated into the power networks pressure difference compensation control method according to the present invention, feature
It is,
The alarm of multisystem minimum pressure is set, is to be indicated for the fault-signal alarm of each single air-compressor set default
Single air-compressor set system exists abnormal, it is necessary to release immediately it is grid-connected prevent failure propagation,
When minimum pressure alarm occurs for each single air-compressor set system, the list air-compressor set system is closed using stop valve
It is grid-connected.
Setting the alarm of multisystem minimum pressure, (low-pressure alarm is pre-warning signal, reminds operator to intervene, passes through starting
Guest machine excludes abnormal point to eliminate low-pressure alarm.Minimum pressure alarm is fault-signal, indicates single air-compressor set system
There are exceptions, it is necessary to which release grid-connected prevents failure propagation immediately), when respective system is alarmed, done without operator
In advance, control system is cut off grid-connected automatically, stop valve emergency cut-off, each system separation.
According to the present invention, by set the low-pressure alarm (each list air-compressor set systems compliant) of single air-compressor set system come
Early warning, operative employee's manual intervention start guest machine or debugging.Set minimum pressure alarm (each list of single air-compressor set system
Air-compressor set systems compliant) cut off that stop valve in grid-connected system unit where alarm point, make fault point from system
It separates.
A kind of multisystem air compression station compressed air is incorporated into the power networks pressure difference compensation control method according to the present invention, feature
It is, in step 7, multisystem terminates grid-connected:
Grid-connected system unit regulating valve aperture y and functional relation of time t when terminating grid-connected is as follows:
N=1,2,3...
T: the time (s),
an: the regulating valve y of n-th of grid-connected system unitnTotal travel setting time (regulating valve ynIt is complete to open required time)
(s)。
When two list air-compressor set system closures are grid-connected, n=1 is taken:
Yn: regulating valve gives aperture (0~100%).
A kind of multisystem air compression station compressed air is incorporated into the power networks pressure difference compensation control method according to the present invention, and feature exists
In if regulating valve valve opening is with angle: 0 to 90 degree indicate that then function becomes:
T: time (s)
an: the regulating valve y of n-th of grid-connected system unitnTotal travel setting time (regulating valve ynIt is complete to open required time)
(s)。
A kind of multisystem air compression station compressed air is incorporated into the power networks pressure difference compensation control method according to the present invention, feature
It is, is determined in the grid-connected position of step 2. multisystem air-compressor set, the multisystem air-compressor set distribution of the multisystem air compression station
Distance is less than 2KM.
According to the present invention, in step 2, the grid-connected position of multisystem air-compressor set is determined, certain due to existing in transmission process
Loss, in usual 2 kilometers effectively.
A kind of multisystem air compression station compressed air is incorporated into the power networks pressure difference compensation control method according to the present invention, feature
It is, the multisystem air compression station includes 2-5 air compression station.
A kind of multisystem air compression station compressed air according to the present invention is incorporated into the power networks pressure difference compensation control method, in multisystem
When air compression station compressed air is incorporated into the power networks, pressure difference compensation control can be carried out to each single air-compressor set system, thus, it is ensured that it is multiple
Pressure smooth transition when system grid connection, while mutual air demand benefit is carried out with the variation of gas load according to each system is different
It repays, realizes most economical operational mode.
Detailed description of the invention
Fig. 1 is flow chart of the present invention.
Fig. 2 is that FCV101 regulating valve of the present invention initially opens controlling curve figure.
Fig. 3 is that FCV101 regulating valve of the present invention initially opens controlling curve slope variation figure.
Fig. 4 is that FCV101 regulating valve FCV101 of the present invention terminates pass controlling curve figure.
Fig. 5 is air compression station connection valve system an example schematic diagram of the present invention.
Fig. 6 is the grid-connected grid-connected system cell schematics of multisystem.
Fig. 7 is the grid-connected topological structure mode one-bus topology an example schematic diagram of multisystem.
Fig. 8 A, B are respectively the grid-connected topological structure mode two-hub-and-spoke configuration example schematic of multisystem.
Fig. 9 is the grid-connected topological structure mode three-hybrid architecture example schematic of multisystem.
Figure 10 is 1#2# air compression station energy-saving run switching flow figure
Specific embodiment
Embodiment:
According to certain steel mill 1#2# air compression station system actual conditions, two systems actual working pressure difference 100KPa, regulating valve
Unidirectional total travel setting 300S is analyzed.
1, FCV101 initially opens the following Fig. 2 of control, shown in 3.
2, when FCV101 initially from Quan Guanxiang evolution to movement when, according to actual system pressure difference | p1-p2 | press curve I
(or II, III) gives valve opening.Pressure difference is bigger, and the slope of curve is smaller, and the valve event time is longer.Conversely, pressure difference is got over
Small, the slope of curve is bigger, and the valve event time is shorter.Pressure difference presses the control of curve I always when being greater than setting 100KPa.
P1 indicates that PT101 detects pressure,
P2 indicates that PT102 detects pressure,
FCV101, which is terminated, closes control as shown in Figure 4.
Consider when separating two systems by maximum pressure differential.
3, energy-saving run
1# air compression station has the air compressor machine of 5 100 m3/min,
2# air compression station has the air compressor machine of 4 150 m3/min,
(1), operating combination
(2), energy-saving run switches, and sees Figure 10
4, chain condition is controlled:
(1), the low alarm LL:6Kpa of the low alarm L:5.8Kpa of 1# air compression station system pressure PT02 and manifold pressure PT101
(2), the low alarm LL of the alarm L:5.8Kpa low with manifold pressure PT102 of 2# air compression station system pressure PI 8002:
6Kpa
(3), FCV102 communicating valve function of automatically cutting off selection " investment ":
Simultaneously " low alarm LL ", FCV102 automatically shuts down (unrelated with operating right) to A./PT02 and PT101, supervises simultaneously
It controls picture report " communicating valve automatically cuts off alarm ".The distant place FCV102 and field valve control cabinet are fail to open.
B./PI8002 and PT102 simultaneously " low alarm LL ", is described with A. point.
When C./" communicating valve automatically cuts off alarm "；FCV101 gives auto zero, closes rapidly, a distant place is fail to open.
(4), FCV102 communicating valve function of automatically cutting off selection " excision ", FCV101/FCV102 full manual control.
(5) when, FCV102 is closed in place；FCV101 gives auto zero, and slowly closing, a distant place is also fail to open.
5, operation operation
(1), control authority setting principle:
1. permission should select a side few in compressor operation number of units；
2. compressor operation number of units is identical, permission should select a side small in gas supply capacity.Judgment method: work as FT101 >
35m3/ h selects " 2# air compression station ", works as FT102 > 35m3/ h is selected " 1# air compression station ".
(2), FCV102 function of automatically cutting off
1. " automatically cutting off investment " must be selected after 1# air compression station and 2# air compression station air compression station are grid-connected；
2. only just allowing to select " automatically cutting off releasing " under special circumstances, such as it is serious can to run number of units for side's air compressor machine
When insufficient, function of automatically cutting off is released when being maintained and supplied by another party.
3. when picture report " communicating valve automatically cuts off alarm ", alarm elimination need to be carried out by Reset.
(3), FCV101 and FCV102 operating method is identical as water treatment facilities
(4) pneumatics station equipment failure method of disposal when, grid-connected
1# air compression station air compression station only shows our station fault message, and similarly 2# air compression station air compression station also only shows that this station failure is believed
Breath.
1. our station equipment obstacle management is referring to " (air compression station) post regulation "；
2. 1# air compression station system pressure PT02 or manifold pressure PT101 are less than 6Kpa low alarm, 1# air compression station runs people
Member remotely starts spare air compressor machine；
3. 2# air compression station system pressure PI 8002 or manifold pressure PT102 is less than 6Kpa low alarm, the operation of 2# air compression station
Personnel remotely start spare air compressor machine；
4. 1# air compression station system pressure PT02 or manifold pressure PT101 are less than 5.5Kpa low alarm, 1# air compression station fortune
Administrative staff is long-range or scene adds and starts spare air compressor machine；
5. 2# air compression station system pressure PI 8002 or manifold pressure PT102 is less than 5.5Kpa low alarm, 2# air compression station
Operations staff is remotely additional to start spare air compressor machine；
6. when picture report " communicating valve automatically cuts off alarm ", operation confirmation FCV101 feedback aperture 0% or FCV102 grey
It is complete to close (white dot).Such as valve state exception, 1# air compression station operations staff's on-site manual closes AIR69 or AIR68,2# pneumatics
Operations staff's on-site manual of standing closes AIR71.
A kind of multisystem air compression station compressed air according to the present invention is incorporated into the power networks pressure difference compensation control method, in multisystem
When air compression station compressed air is incorporated into the power networks, pressure difference compensation control can be carried out to each single air-compressor set system, thus, it is ensured that it is multiple
Pressure smooth transition when system grid connection, while mutual air demand benefit is carried out with the variation of gas load according to each system is different
It repays, realizes most economical operational mode.
Claims (11)
- The pressure difference compensation control method 1. a kind of multisystem air compression station compressed air is incorporated into the power networks, each air compression station being incorporated into the power networks, i.e., The minimum supply gas pressure that user under each list air-compressor set system needs is consistent, and the multisystem air compression station includes n+1 pneumatics It stands, i.e. list air-compressor set system, the n+1 air compression station, i.e., single air-compressor set system at least constitutes n grid-connected system unit,It is characterized in that, being directed to each grid-connected system unit, the method includes the steps as follows:Each single air-compressor set system standard pressure setting of one,；The grid-connected position of two, multisystem air compression stations determines；Each single air-compressor set system pipe network actual pressure of three, detection, and it is uploaded to computer control managing center (PLC)；Each single air-compressor set system pressure difference of four, calculates, i.e., due to each single air-compressor set system is pressure needed for satisfaction itself operates Existing mutual difference；The grid-connected pressure difference adjustment of five, multisystem air compression stations, that is, single air-compressor set system safety pressure margin is adjusted to its own pressure still Other single air-compressor set systems of pressure needed for operating itself are unsatisfactory for, to reach energy-efficient purpose；Six, multisystem air compression station operating pressure alarm settings, it may be assumed that this can be met for each its own pressure of single air-compressor set system The minimal pressure masterpiece alarm settings that unit user requires；If no pressure is alarmed, then grid-connected compensation control terminates, and enters step seven, operates normally under multisystem grid connection state；If any pressure alarm, then enters troubleshooting or cut off by stop valve grid-connected, separation system, compressed air is incorporated into the power networks Pressure difference compensation control adjustment operates normally；Seven, compensation control terminates, and operates normally under multisystem grid connection state,In step 5, using regulating valve to the system for requiring supplementation with pressure, i.e., the compressed air of each single air-compressor set system it is grid-connected Pressure is adjusted,Adjusting method is as follows:Regulating valve functional relation of aperture y and time t when initial grid-connected meets following formula:In formula,I and j: respectively representing n-th of regulating valve two sides System Number,Pi and Pj: respectively representing the actual pressure of n-th of regulating valve, two side system,N: n-th grid-connected system unit,yn: the given aperture of the regulating valve of n-th of grid-connected system unit, 0~100%,an: the regulating valve y of n-th of grid-connected system unitnTotal travel setting time, i.e. regulating valve ynThe time required to full opening, s,bn: maximum pressure differential when two systems work independently in n-th of grid-connected system unit, KPa,T: the opening time of different moments, s, by the way that time value is substituted into above-mentioned public affairs after the grid-connected beginning of single air compressor machine regulating valve Formula obtains the aperture of different moments lower valve.
- The pressure difference compensation control method 2. a kind of multisystem air compression station compressed air as described in claim 1 is incorporated into the power networks, feature It is,In step 4, carries out grid-connected system unit pressure difference and calculates,P=| Pi-Pj|Wherein: P is different single air-compressor set system unit pressure differences, KPa,Pi: the pressure of n-th of one side system of regulating valve, KPa,Pj: the pressure of another side system of n-th of regulating valve, KPa.
- The pressure difference compensation control method 3. a kind of multisystem air compression station compressed air as described in claim 1 is incorporated into the power networks, feature It is,In step 5, carry out grid-connected pressure difference adjustment, the pressure difference that the actual working pressure of the multisystem air compression station is differently formed into Row control compensation so that multisystem air compression station it is grid-connected it is steady after, the actual pressure of the multisystem air compression station is consistent, and multisystem is empty Press the regulating valve and stop valve standard-sized sheet at station.
- The pressure difference compensation control method 4. a kind of multisystem air compression station compressed air as described in claim 1 is incorporated into the power networks, feature It is,In application conditionsIn " 100 " indicate valve maximum opening 100%,If valve opening is with angle: 0 to 90 degree indicate,Then above-mentioned application conditions become2. formula becomes
- The pressure difference compensation control method 5. a kind of multisystem air compression station compressed air as described in claim 1 is incorporated into the power networks, feature It is,When using n grid-connected system unit, n regulating valve is used,N=1 is taken, first grid-connected system unit obtains the 1st regulating valve control function, and first regulating valve both sides is p1/p2Two A system,N=2 is taken again, and second grid-connected system unit obtains the 2nd regulating valve control function, and second regulating valve both sides is p2/p3 Two systems,When grid-connected more than the multisystem of n=2, regulating valve control function is still successively obtained by above-mentioned steps.
- The pressure difference compensation control method 6. a kind of multisystem air compression station compressed air as described in claim 1 is incorporated into the power networks, feature It is,In step 6, after grid-connected, setting multisystem low-pressure alarm is alarmed for each single air-compressor set default low-pressure, When alarming, start spare air compressor machine.
- The pressure difference compensation control method 7. a kind of multisystem air compression station compressed air as described in claim 1 is incorporated into the power networks, feature It is,The alarm of multisystem minimum pressure is set, is the fault-signal alarm for each single air-compressor set default, indicates single empty Press machine set system to exist abnormal, it is necessary to release immediately it is grid-connected prevent failure propagation,When minimum pressure alarm occurs for each single air-compressor set system, the list air-compressor set system is closed simultaneously using stop valve Net.
- The pressure difference compensation control method 8. a kind of multisystem air compression station compressed air as described in claim 1 is incorporated into the power networks, feature It is,In step 7, multisystem terminates grid-connected:Grid-connected system unit regulating valve aperture y and functional relation of time t when terminating grid-connected is as follows:T: time, s；an: the regulating valve y of n-th of grid-connected system unitnTotal travel setting time, i.e. regulating valve ynIt is complete to open required time, s；When two list air-compressor set system closures are grid-connected, n=1 is taken:Yn: the given aperture of the regulating valve of n-th of grid-connected system unit, 0~100%.
- The pressure difference compensation control method 9. a kind of multisystem air compression station compressed air as claimed in claim 8 is incorporated into the power networks, feature It is,If regulating valve valve opening is with angle: 0 to 90 degree indicate that then function becomes:The t time, s,an: the regulating valve y of n-th of grid-connected system unitnTotal travel setting time, i.e. regulating valve ynIt is complete to open required time, s.
- The pressure difference compensation control method 10. a kind of multisystem air compression station compressed air as described in claim 1 is incorporated into the power networks, feature It is,It is determined in the grid-connected position of step 2. multisystem air-compressor set, constitutes the n+1 air compression station of the multisystem air compression station Air-compressor set distribution distance be less than 2KM.
- The pressure difference compensation control method 11. a kind of multisystem air compression station compressed air as described in claim 1 is incorporated into the power networks, feature It is,The multisystem air compression station includes 2-5 air compression station.
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| CN110107525B (en) * | 2018-12-10 | 2020-05-05 | 杭州能源投资管理有限公司 | Control method for system pressure of centrifugal air compression station |
| CN110360453B (en) * | 2019-06-14 | 2021-08-10 | 武汉钢铁集团气体有限责任公司 | Air pipe network system and control method |
| CN113653622B (en) * | 2021-09-07 | 2022-03-22 | 广东鑫钻节能科技股份有限公司 | Differential pressure compensation method based on compressed air grid-connected operation of multiple air compression stations |
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| CN1068175A (en) * | 1992-07-16 | 1993-01-20 | 北京科日达电子技术有限公司 | Constant pressure variable control system for fully automatic air compression station |
| CN103291594A (en) * | 2013-06-28 | 2013-09-11 | 重庆埃泰克能源科技有限公司 | Trend control method for gas supply of air compressor set |
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