CN104533820B - Anti surge control method and device - Google Patents
Anti surge control method and device Download PDFInfo
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- CN104533820B CN104533820B CN201410829327.XA CN201410829327A CN104533820B CN 104533820 B CN104533820 B CN 104533820B CN 201410829327 A CN201410829327 A CN 201410829327A CN 104533820 B CN104533820 B CN 104533820B
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- operating point
- control line
- surge
- deviation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention discloses an anti surge control method and device. An outlet pressure value, an inlet pressure value and an inlet flow rate are obtained; a coordinate of a working point is calculated according to the outlet pressure value, the inlet pressure value and the inlet flow rate; when a deviation of the working point coordinate occurs, and a differential of a working point offset to time is calculated ; according to the differential of a working point offset to time, the deviation of an anti surge control line is calculated and the position of the anti surge control line is revised; according to the revised surge control line, whether the working point is in a surge area is judged; when the working point is in the surge area, an anti surge control signal is output for conducting an anti surge control. The embodiment of the invention references a differential response processing method, successfully solves the problem of the working point disturbance and reduces the probability and risk of misjudgment.
Description
Technical field
The present invention relates to technical field of industrial automatic control, particularly relate to a kind of anti-surge control method and device.
Background technology
Surge is the running status of a kind of instability making centrifugal compression device performance abnormality.Centrifugal compression device
When sending surge, will appear from the air-flow periodic vibration phenomenon of whole blower fan pipe network system, and significantly aggravate whole
Unit vibration.There will be severe stress disorder and cause strong vibration, so that sealing and bearing damage etc.
Situation.
The surge process being likely to occur in centrifugal compression device operating is: flow is reduced to outlet pressure during minima
Power can decline suddenly, and centrifugal compression device characteristic curve is as it is shown in figure 1, corresponding one of each fixed rotating speed
(shown in dotted line, rotating speed n1, n2, n3 distinguish corresponding three to the static characteristic curve of air quantity-discrepancy pressure ratio
Bar static characteristic curve), it show centrifugal compression device compression ratio (Pd/Ps, Pd are outlet pressure,
Ps is inlet pressure) and entrance suck the relation between gas flow (Q), when rotating speed n mono-timing, curve
Upper some C has maximum compression ratio, and corresponding flow is Qp, and this point is referred to as pumping point, now, and manifold pressure
On the contrary higher than outlet pressure, in then transported medium flows back to machine, until outlet pressure raises again to pipe
Till road pumped (conveying) medium；When the pressure in pipeline returns to original pressure, flow reduces again, pipeline
Medium produces again refluence, so goes round and begins again.The curve that the characteristic pumping point of different rotating speeds is linked to be
It is called surge curve.With surge line as boundary, upper left side is surge area, and lower right is non-surge area.According to breathing heavily
The alignment that shakes moves right 5%-10%, produces antisurge control line.
Actual production should be avoided centrifugal compression device run at pumping point as far as possible, once run at pumping point,
It is accomplished by taking control method to solve.Control method of the prior art, when surge occurs when,
For ensureing that the safety produced is carried out, device damage, booster compression system is prevented to be provided with anti-surge protection, pass through
Regulation rotating speed and bypass valve aperture, control operating point and fall back to inside safe normal operation region, thus protect
The safety of card unit, reaches the purpose of anti-surge.Antisurge control system of the prior art carries according to producer
Unit performance curve (typically all calculated value) parameter of confession carries out the setting of anti-surge curve, but existing
Have in technology, do not account in actual motion, operating point disturbance so that surge line parameter error, Jin Eryin
Rise and control erroneous judgement, add surge occurrence risk.
Summary of the invention
The present invention provides a kind of anti-surge control method and device, solves operating point disturbance in prior art, makes
Obtain surge line parameter error, and then cause control erroneous judgement, add the technical problem of surge occurrence risk.
It is an object of the invention to be achieved through the following technical solutions:
A kind of anti-surge control method, including:
Obtain outlet pressure, inlet pressure and inlet flow rate；
According to described outlet pressure, described inlet pressure and described inlet flow rate, calculate the coordinate of operating point；
When described operating point coordinate occurs skew, calculate the side-play amount time differential of described operating point；
Side-play amount time differential according to described operating point, calculates the deviation of antisurge control line, and
The position of described antisurge control line is modified；
According to revised described antisurge control line, it is judged that whether described operating point is positioned at surge area；
When described be positioned at surge area time, export Anti-surge Control signal, to carry out Anti-surge Control.
A kind of anti-surge control device, including:
Sensor assembly, is used for obtaining outlet pressure, inlet pressure and inlet flow rate；
First computing module, is used for according to described outlet pressure, described inlet pressure and described inlet flow rate,
Calculate the coordinate of operating point；
Second computing module, for when described operating point coordinate occurs skew, calculating the inclined of described operating point
Shifting amount time differential；
3rd computing module, for the side-play amount time differential according to described operating point, calculates anti-asthma
Shake the deviation of control line, and the position of described antisurge control line is modified；
Anti-surge Control module, for according to revised described antisurge control line, it is judged that described operating point
Whether it is positioned at surge area；
Regulation against surge module, for when described be positioned at surge area time, export Anti-surge Control signal, to enter
Row Anti-surge Control.
The embodiment of the present invention provides a kind of anti-surge control method and device, by obtain outlet pressure,
Inlet pressure and inlet flow rate；According to described outlet pressure, described inlet pressure and described inlet flow rate, meter
Calculate the coordinate of operating point；When described operating point coordinate occurs skew, calculate the side-play amount of described operating point
Time differential；Side-play amount time differential according to described operating point, calculates antisurge control line
Deviation, and the position of described antisurge control line is modified；According to revised described anti-surge control
Line processed, it is judged that whether described operating point is positioned at surge area；When described be positioned at surge area time, export anti-surge control
Signal processed, to carry out Anti-surge Control.The embodiment of the present invention quotes rate response processing method, successfully solves
Operating point perturbed problem, reduces erroneous judgement probability and risk.
Accompanying drawing explanation
The characteristic curve schematic diagram of the compressed air unit that Fig. 1 provides for the embodiment of the present invention；
The application scenarios schematic diagram of the compressed air unit that Fig. 2 provides for the embodiment of the present invention；
A kind of anti-surge control method flow chart that Fig. 3 provides for the embodiment of the present invention；
A kind of anti-surge control device schematic diagram that Fig. 4 provides for the embodiment of the present invention.
Detailed description of the invention
Understandable for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from, below in conjunction with the accompanying drawings and
The present invention is further detailed explanation for detailed description of the invention.
Such as the application scenarios schematic diagram of the compressed air unit that Fig. 2 provides for the embodiment of the present invention, centrifugal compressed
Air is compressed by machine, surge-proofing controller can by PLC (programmable logic controller (PLC)) and
Ancillary equipment realizes, and surge-proofing controller input is inlet pressure Ps, air inlet flow Q, gas outlet
Pressure Pd, surge-proofing controller is output as the value of Anti-surge Control output MV and (such as bypasses vent valve
Aperture).Below as a example by the work process of surge-proofing controller, introduce the one that the embodiment of the present invention provides
Anti-surge control method, as it is shown on figure 3, include:
Step 301, acquisition outlet pressure, inlet pressure and inlet flow rate；
Wherein, outlet pressure, inlet pressure and inlet flow rate can be obtained by pressure transducer；
Step 302, according to described outlet pressure, described inlet pressure and described inlet flow rate, calculating is gone to work
Make the coordinate of point；
Wherein, the abscissa of operating point be inlet flow rate Q, vertical coordinate be outlet pressure Pd and inlet pressure
The ratio of Ps.
Step 303, when described operating point coordinate occur skew time, when calculating the side-play amount pair of described operating point
Between differential；
Wherein, due to flow or the unexpected disturbance of pressure, operating point left shift is caused.In n-th cycle
Differential Dvl (n)=(Diff (n)-sRueck (n)) * Vale, Diff (n) are that the deviation in the n-th cycle is
(X (n)-Xsp (n)) × K, K are deviation amplification, and X (n) is the operating point abscissa in the n-th cycle, Xsp (n)
Being the operating point in the n-th cycle, the corresponding abscissa on antisurge control line of X (n) vertical coordinate, Vale is micro-
Dividing coefficient, Vale is a upper periodic deviation value equal to TD/ (Cycle*0.5+tg1), sRueck (n)
Diff (n-1), TD are derivative time, and Cycle is sweep time, and Tg1 is that between differential time delay, (this value is necessary
More than 0.5*Cycle, if arranging big, then after the differential action, time of return increases)；Most start Diff (1)
Being 0, sRueck (0) is also 0, when there being suddenly a disturbance, owing to sRueck (n) was the value in a upper cycle
For, so Dvl (n) can be made according to Dvl (n)=(Diff (n)-sRueck (n)) * TD/ (Cycle*0.5+tg1)
Produce a differential calculation result the biggest；
For next cycle sRueck (n+1)=RueckDiff (n)+RueckAlt (n),
Wherein, RueckAlt (n)=sRueck (n), RueckDiff (n)=Cycle/TD*Dvl (n)+sRestDif
(sRestDif may be considered 0, and it and final stage are the floating point errors calculating PLC, the most real
Matter meaning, is considered 0 substantially)), so sRueck (n+1)=RueckDiff (n)+sRueck (n), can see
The value going out next cycle sRueck (n+1) is to increase, then Dvl (n)=(Diff (n)-sRueck (n)) * TD/
(Cycle*0.5+tg1) result can diminish in next cycle, by that analogy, when the feelings that Diff (n) is constant
Under condition, differentiation result Dvl (n) slowly diminishes, i.e. the differential action slowly weakens.
Step 304, side-play amount time differential according to described operating point, calculate antisurge control line
Deviation, and the position of described antisurge control line is modified；
Wherein, when operating point is moved with speed V to the left due to the reason such as flow or pressure oscillation, anti-asthma
The control line that shakes, by the side-play amount time differential according to described operating point, calculates the inclined of antisurge control line
Difference, made anticipation before entrance surge area, operating point.It is the biggest that operating point is moved to the left speed, anti-surge control
The right offset distance of alignment processed is the biggest.Dvl is differential calculation result, and this value is the deviation of antisurge control line,
Therefore plus this deviation value on the basis of antisurge control line initial position, it is achieved to described Anti-surge Control
The position of line is modified；
Step 305, according to revised described antisurge control line, it is judged that whether described operating point is positioned at is breathed heavily
Shake district；
Wherein, antisurge control line will calculate the corresponding degree of deviation also according to the differential program within program bag
And quickly move right, before operating point enters surge line, make anticipation.
Step 306, when described be positioned at surge area time, export Anti-surge Control signal, to carry out anti-surge control
System.
Shown in after step 306, when described operating point coordinate does not occur skew, antisurge control line will be by
Revised position is slowly recovered to initial position.
The embodiment of the present invention, by obtaining outlet pressure, inlet pressure and inlet flow rate；According to described outlet
Pressure, described inlet pressure and described inlet flow rate, calculate the coordinate of operating point；When described operating point is sat
When mark occurs skew, calculate the side-play amount time differential of described operating point；Inclined according to described operating point
Shifting amount time differential, calculates the deviation of antisurge control line, and the position to described antisurge control line
Put and be modified；According to revised described antisurge control line, it is judged that whether described operating point is positioned at surge
District；When described be positioned at surge area time, export Anti-surge Control signal, to carry out Anti-surge Control.Quote micro-
Divide response processing method, successfully solve operating point perturbed problem, reduce erroneous judgement probability and risk.
A kind of anti-surge control method provided in the embodiment of the present invention, can be realized by PLC, due to
The control system of different series has respective software platform and function library, program structure and programming mode the most each
Differ, thus cause same compressor group to use and can produce difference under the PLC of different brands programs
Automatic control anti-surge program, cause control effect deviation relatively big, and then making, parameter is set have no reference value,
This just brings difficulty for unit troubleshooting and parameter tuning.The embodiment of the present invention uses versatility language
(SCL language), this language can conveniently be transplanted to nearly all PLC system, can Rapid transplant to any
In model PLC, make the automatic control anti-surge program control method under different PLC completely the same.
The embodiment of the present invention additionally provides a kind of anti-surge control device, as shown in Figure 4, including:
Sensor assembly 410, is used for obtaining outlet pressure, inlet pressure and inlet flow rate；
First computing module 420, for according to described outlet pressure, described inlet pressure and described entrance stream
Amount, calculates the coordinate of operating point；
Second computing module 430, for when described operating point coordinate occurs skew, calculating described operating point
Side-play amount time differential；
3rd computing module 440, for the side-play amount time differential according to described operating point, calculates
The deviation of antisurge control line, and the position of described antisurge control line is modified；
Anti-surge Control module 450, for according to revised described antisurge control line, it is judged that described work
Make whether point is positioned at surge area；
Regulation against surge module 460, for when described be positioned at surge area time, export Anti-surge Control signal,
To carry out Anti-surge Control.
Wherein, described 3rd computing module 440, including:
Deviation computing unit 441, for the side-play amount time differential according to described operating point, calculates
The deviation of antisurge control line；
Amending unit 442, for being moved from initial position by described antisurge control line, displacement is institute
State the deviation that deviation computing unit calculates, to realize the position of described antisurge control line is modified.
Described Anti-surge Control module 450 is additionally operable to when described operating point coordinate does not occur skew, anti-surge
Control line slowly will be recovered to initial position by revised position.
Through the above description of the embodiments, those skilled in the art is it can be understood that arrive this
Invention can add the mode of required hardware platform by software and realize, naturally it is also possible to all by hard
Part is implemented, but a lot of in the case of the former is more preferably embodiment.Based on such understanding, this
What background technology was contributed by bright technical scheme in whole or in part can be with the form of software product
Embodying, this computer software product can be stored in storage medium, such as ROM/RAM, magnetic
Dish, CD etc., including some instructions with so that computer equipment (can be personal computer,
Server, or the network equipment etc.) perform each embodiment of the present invention or some part of embodiment
Described method.
Above the present invention is described in detail, former to the present invention of specific case used herein
Reason and embodiment are set forth, and the explanation of above example is only intended to help to understand the present invention's
Method and core concept thereof；Simultaneously for one of ordinary skill in the art, according to the think of of the present invention
Think, the most all will change, in sum, this specification
Content should not be construed as limitation of the present invention.
Claims (5)
1. an anti-surge control method, it is characterised in that including:
Obtain outlet pressure, inlet pressure and inlet flow rate；
According to described outlet pressure, described inlet pressure and described inlet flow rate, calculate the coordinate of operating point；
When described operating point coordinate occurs skew, calculate the side-play amount time differential of described operating point；
Side-play amount time differential according to described operating point, calculates the deviation of antisurge control line, and
The position of described antisurge control line is modified；Described when described operating point coordinate occurs skew, meter
Calculate the side-play amount time differential of described operating point, including:
When described operating point coordinate occurs skew, calculate differential Dvl (n) in the n-th cycle=(Diff (n)
-sRueck (n)) * Vale, wherein, Diff (n) be the deviation in the n-th cycle be (X (n)-Xsp (n)) × K, K
For deviation amplification, X (n) is the operating point abscissa in the n-th cycle, and Xsp (n) is the vertical coordinate pair of X (n)
Should abscissa on antisurge control line, Vale is differential coefficient, and Vale is equal to TD/ (Cycle*0.5+
Tg1), sRueck (n) is upper periodic deviation value Diff (n-1), and TD is derivative time, and Cycle is to sweep
Retouching the time, Tg1 is between differential time delay, and described Tg1 is more than 0.5*Cycle；
According to revised described antisurge control line, it is judged that whether described operating point is positioned at surge area；
When described operating point is positioned at surge area, export Anti-surge Control signal, to carry out Anti-surge Control.
Method the most according to claim 1, it is characterised in that described inclined according to described operating point
Shifting amount time differential, calculates the deviation of antisurge control line, and the position to described antisurge control line
Put and be modified, including:
Side-play amount time differential according to described operating point, calculates the deviation of antisurge control line；
Being moved from initial position by described antisurge control line, displacement is the inclined of described antisurge control line
Difference, to realize being modified the position of described antisurge control line.
Method the most according to claim 1, it is characterised in that described breathe heavily when described operating point is positioned at
Shake district time, export Anti-surge Control signal, with carry out Anti-surge Control step after, including:
When described operating point coordinate does not occur skew, antisurge control line will be the most extensive by revised position
Multiple to initial position.
4. an anti-surge control device, it is characterised in that including:
Sensor assembly, is used for obtaining outlet pressure, inlet pressure and inlet flow rate；
First computing module, is used for according to described outlet pressure, described inlet pressure and described inlet flow rate,
Calculate the coordinate of operating point；
Second computing module, for when described operating point coordinate occurs skew, calculating the inclined of described operating point
Shifting amount time differential；
3rd computing module, for the side-play amount time differential according to described operating point, calculates anti-asthma
Shake the deviation of control line, and the position of described antisurge control line is modified；
Described 3rd computing module, including:
Deviation computing unit, for the side-play amount time differential according to described operating point, calculates anti-asthma
Shake the deviation of control line；Described when described operating point coordinate occurs skew, calculate the skew of described operating point
Amount time differential, including:
When described operating point coordinate occurs skew, calculate differential Dvl (n) in the n-th cycle=(Diff (n)
-sRueck (n)) * Vale, wherein, Diff (n) be the deviation in the n-th cycle be (X (n)-Xsp (n)) × K, K
For deviation amplification, X (n) is the operating point abscissa in the n-th cycle, and Xsp (n) is the vertical coordinate pair of X (n)
Should abscissa on antisurge control line, Vale is differential coefficient, and Vale is equal to TD/ (Cycle*0.5+
Tg1), sRueck (n) is upper periodic deviation value Diff (n-1), and TD is derivative time, and Cycle is to sweep
Retouching the time, Tg1 is between differential time delay；Described Tg1 is more than 0.5*Cycle；
Amending unit, for described antisurge control line is moved from initial position, displacement be described partially
The deviation that difference computing unit calculates, to realize being modified the position of described antisurge control line；
Anti-surge Control module, for according to revised described antisurge control line, it is judged that described operating point
Whether it is positioned at surge area；
Regulation against surge module, for when described operating point is positioned at surge area, exports Anti-surge Control signal,
To carry out Anti-surge Control.
Device the most according to claim 4, it is characterised in that described Anti-surge Control module is also used
In time there is not skew when described operating point coordinate, antisurge control line slowly will be recovered by revised position
To initial position.
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| CN201410829327.XA CN104533820B (en) | 2014-12-26 | 2014-12-26 | Anti surge control method and device |
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| CN201410829327.XA CN104533820B (en) | 2014-12-26 | 2014-12-26 | Anti surge control method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12163711B2 (en) | 2021-06-25 | 2024-12-10 | Carrier Corporation | Surge prevention in a chiller with centrifugal compressor |
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| CN105543443B (en) * | 2015-12-29 | 2018-07-24 | 中冶南方工程技术有限公司 | A method of being used for coal gas of converter pressuring machine antisurge control system |
| CN105889112B (en) * | 2016-04-10 | 2017-07-28 | 北京化工大学 | A Surge Protection Method for Centrifugal Compressor Based on Membership Function Model |
| CN106269310B (en) * | 2016-09-27 | 2018-06-29 | 珠海格力电器股份有限公司 | Surge control system |
| CN106640725A (en) * | 2016-11-14 | 2017-05-10 | 北京化工大学 | Centrifugal compressor surge fault regulating and controlling method |
| CN106368975B (en) * | 2016-11-25 | 2017-12-01 | 沈阳鼓风机集团股份有限公司 | A kind of PCL compressor performances control method and device |
| CN109424575B (en) * | 2017-09-01 | 2020-09-15 | 上海汽车集团股份有限公司 | Flow control method and device and vehicle-mounted equipment |
| CN108131319B (en) * | 2017-12-21 | 2019-09-20 | 沈阳鼓风机集团自动控制系统工程有限公司 | Surge detection method and device |
| CN108361219A (en) * | 2018-01-09 | 2018-08-03 | 莱芜钢铁集团电子有限公司 | A kind of surge in centrifugal compressors control method and device |
| CN110469534B (en) * | 2019-08-27 | 2021-08-24 | 佛山格尼斯磁悬浮技术有限公司 | Blower surge protection method and system |
| CN110735669B (en) * | 2019-10-08 | 2021-12-28 | 中国航发沈阳发动机研究所 | Method and device for judging rotating stall of aviation gas turbine engine |
| CN111188784B (en) * | 2019-10-09 | 2022-03-22 | 浙江中控技术股份有限公司 | Anti-surge self-adaptive control method |
| CN111059074A (en) * | 2019-12-25 | 2020-04-24 | 浙江中控技术股份有限公司 | Method, device and system for determining running state of compressor |
| CN115324921A (en) * | 2022-07-27 | 2022-11-11 | 东风汽车集团股份有限公司 | Air compressor surge judgment method, device and equipment |
| CN115467850B (en) * | 2022-10-14 | 2024-09-06 | 中国第一汽车股份有限公司 | Centrifugal air compressor characteristic test system and test method |
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| DE19828368C2 (en) * | 1998-06-26 | 2001-10-18 | Man Turbomasch Ag Ghh Borsig | Method and device for operating two-stage or multi-stage compressors |
| JP2006002650A (en) * | 2004-06-17 | 2006-01-05 | Toyota Motor Corp | Centrifugal compressor with linked inlet vane and bypass control valve |
| CN102635565B (en) * | 2012-03-30 | 2014-10-15 | 西安陕鼓动力股份有限公司 | Method for dynamically biasing anti-surge curve of turbine compressor |
| CN102788004B (en) * | 2012-07-30 | 2015-01-21 | 宝山钢铁股份有限公司 | Anti-surge early warning control method of COREX gas compressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12163711B2 (en) | 2021-06-25 | 2024-12-10 | Carrier Corporation | Surge prevention in a chiller with centrifugal compressor |
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