CN106895022B

CN106895022B - Anti-surge control method, control device and control system

Info

Publication number: CN106895022B
Application number: CN201710253906.8A
Authority: CN
Inventors: 温旭; 李学青; 于政日; 赵睿; 宋锋
Original assignee: SHENYANG BLOWER WORKS GROUP AUTOMATIC CONTROL SYSTEM ENGINEERING Co Ltd
Current assignee: SHENYANG BLOWER WORKS GROUP AUTOMATIC CONTROL SYSTEM ENGINEERING Co Ltd
Priority date: 2017-04-18
Filing date: 2017-04-18
Publication date: 2018-04-06
Anticipated expiration: 2037-04-18
Also published as: CN106895022A

Abstract

The embodiment of the invention discloses a kind of anti-surge control method, control device and control system.Wherein, method includes：Detect the Regulate signal of convection body machinery；The instantaneous operating point of the fluid machinery is determined according to the Regulate signal；Each working region of the fluid machinery is determined according to preset rules centered on the instantaneous operating point；Determine the real-time working point of the fluid machinery；Anti-surge valve is controlled according to position of the real-time working point in each workspace.The Regulate signal mechanical by detecting convection body of the embodiment of the present invention, before being changed in the operating point of fluid machinery but being also not up to performance of expected change, control anti-surge valve action in advance, so as to more directly more effectively carry out Anti-surge Control in advance, reduce the fluctuation of operating point, ensure the stable operation of fluid machinery.

Description

Anti-surge control method, control device and control system

Technical field

The invention belongs to fluid machinery control field, more particularly to a kind of anti-surge control method, control device and control System processed.

Background technology

Surge is shaking under a kind of damage that turbo-compressor is occurred when flow is reduced to a certain extent Dynamic, centrifugal compressor is one kind of turbo-compressor, and surge can cause serious harm to centrifugal compressor.

At present, for the Anti-surge Control of centrifugal compressor, it is with the inlet flow rate of centrifugal compressor mostly and goes out Mouth pressure carries out Anti-surge Control as control parameter, specifically has occurred and that change in the operating point of centrifugal compressor Afterwards, carried out using the inlet flow rate of centrifugal compressor and outlet pressure as parameter it is various in a manner of regulation, this control method Although the purpose of anti-surge can be reached, regulation is remained in itself not in time, surge, shadow easily occur for unit The problem of ringing unit normal use.

The content of the invention

The technical problem to be solved of the embodiment of the present invention is：There is provided a kind of anti-surge control method, control device and Control system, with changed in operating point but also be not up to performance of expected change before, in advance control anti-surge valve action.

One side according to embodiments of the present invention, there is provided a kind of anti-surge control method, including：

Detect the Regulate signal of convection body machinery；

The instantaneous operating point of the fluid machinery is determined according to the Regulate signal；

Each working region of the fluid machinery is determined according to preset rules centered on the instantaneous operating point；

Determine the real-time working point of the fluid machinery；

Anti-surge valve is controlled according to position of the real-time working point in each workspace.

It is described that the fluid machinery is determined according to the Regulate signal in another embodiment based on the above method of the present invention Instantaneous operating point, including：

Judge whether the performance of expected change amount of the flow of the fluid machinery caused by the Regulate signal meets default bar Part；

If the performance of expected change amount of the flow of the fluid machinery caused by the Regulate signal meets preparatory condition, to work as The working condition of the preceding fluid machinery is as instantaneous operating point.

In another embodiment based on the above method of the present invention, the preparatory condition includes：The flow of the fluid machinery Expection reduction amount be more than presently described fluid machinery inlet flow rate pre-set ratio.

In another embodiment based on the above method of the present invention, the working condition using presently described fluid machinery as Instantaneous operating point, including：

Obtain the inlet and outlet pressure and inlet flow rate data of presently described fluid machinery；

It is bent in the performance of the fluid machinery according to the inlet and outlet pressure of presently described fluid machinery and inlet flow rate data The position where the working condition of presently described fluid machinery is determined in line chart, as instantaneous operating point.

In another embodiment based on the above method of the present invention, each working region includes：Work allows area and work Adjust area.

In another embodiment based on the above method of the present invention, it is described centered on the instantaneous operating point according to default rule Each working region of the fluid machinery is then determined, including：

Centered on the instantaneous operating point, respectively with the instantaneously performance chart of the operating point in the fluid machinery In transverse and longitudinal coordinate the first pre-set ratio for long semi-minor axis construct the first elliptical region；With in first elliptical region Region in addition to the instantaneous operating point allows area as work, is adjusted using the region outside first elliptical region as work Main plot.

In another embodiment based on the above method of the present invention, the real-time working point for determining the fluid machinery, bag Include：

It is bent in the performance of the fluid machinery according to the inlet and outlet pressure of presently described fluid machinery and inlet flow rate data The position where the instantaneous operating conditions of presently described fluid machinery is determined in line chart, as real-time working point.

In another embodiment based on the above method of the present invention, it is described according to the real-time working point in each workspace In position control anti-surge valve, including：

Judge the real-time working point of the fluid machinery whether at the instantaneous operating point；

If the real-time working point of the fluid machinery is not located at the instantaneous operating point, the reality of the fluid machinery is judged When operating point whether positioned at the work allow area；

If the real-time working point of the fluid machinery is located at the work and allows area, using dividing loop pid control mode control Anti-surge valve processed is opened；If the real-time working point of the fluid machinery is located at work adjustment area, adoption rate control mode Anti-surge valve is controlled to open.

In another embodiment based on the above method of the present invention, each working region also includes：Work wave zone.

In another embodiment based on the above method of the present invention, it is described centered on the instantaneous operating point according to default rule Each working region of the fluid machinery is then determined, in addition to：

Centered on the instantaneous operating point, respectively with the instantaneously performance chart of the operating point in the fluid machinery In transverse and longitudinal coordinate the second pre-set ratio for long semi-minor axis construct the second elliptical region, wherein second pre-set ratio is big In first pre-set ratio；Region using in second elliptical region in addition to first elliptical region is used as work Area is adjusted, work wave zone is used as using the region outside second elliptical region.

In another embodiment based on the above method of the present invention, the adoption rate control mode control anti-surge valve is beaten Open, in addition to：

If the real-time working point of the fluid machinery, which is not located at the work, allows area, the real-time of the fluid machinery is judged Whether operating point is positioned at work adjustment area；

If the real-time working point of the fluid machinery is located at work adjustment area, controlled using equal proportion control mode anti- Surge valve is opened；If the real-time working point of the fluid machinery is located at the work wave zone, using control with changed scale control mode control Anti-surge valve processed is opened.

In another embodiment based on the above method of the present invention, it is described according to the real-time working point in each workspace In position control anti-surge valve, in addition to：

Judge whether the fluid machinery real-time working point returns to the instantaneous operating point；

If the real-time working point of the fluid machinery returns to the instantaneous operating point, using major loop pid control mode control Make the anti-surge valve and return to initial position；If the real-time working point of the fluid machinery is not returned to the instantaneous operating point, hold Whether the row real-time working point for judging the fluid machinery allows the operation in area positioned at the work.

If the real-time working point of the fluid machinery is not returned to the instantaneous operating point, the real-time of the fluid machinery is judged Whether operating point is located at the left side of anti-surge line in the performance chart of the fluid machinery；

If the real-time working point of the fluid machinery is not located at the left side of anti-surge line, the judgement fluid machine is performed Whether the real-time working point of tool allows the operation in area positioned at the work；If the real-time working point of the fluid machinery is located at anti-asthma Shake the left side of line, judge the fluid machinery real-time working point whether the surge in the performance chart of the fluid machinery The left side of line；

If the real-time working point of the fluid machinery is not located at the left side of surge line, using major loop pid control mode control The anti-surge valve is made to open；If the real-time working point of the fluid machinery is located at the left side of surge line, directly control described anti- Surge valve standard-sized sheet.

In another embodiment based on the above method of the present invention, each working region also includes：Dead band, when described real-time When operating point is located in the dead band, it is believed that the real-time working point is located at or returned to the instantaneous operating point.

Other side according to embodiments of the present invention, there is provided a kind of anti-surge control device, including：

Regulate signal detection unit, for detecting the Regulate signal of convection body machinery；

Operating point determining unit, for determining the instantaneous operating point of the fluid machinery according to the Regulate signal；And Determine the real-time working point of the fluid machinery；

Working region determining unit, for determining the fluid machine according to preset rules centered on the instantaneous operating point Each working region of tool；

Anti-surge valve control unit, for controlling anti-asthma according to position of the real-time working point in each workspace Shake valve.

In another embodiment based on said apparatus of the present invention, the operating point determining unit, it is specifically used for：

In another embodiment based on said apparatus of the present invention, the preparatory condition includes：The flow of the fluid machinery Expection reduction amount be more than presently described fluid machinery inlet flow rate pre-set ratio.

In another embodiment based on said apparatus of the present invention, if the flow of the fluid machinery caused by the Regulate signal Performance of expected change amount meet preparatory condition, the operating point determining unit is specifically used for：

In another embodiment based on said apparatus of the present invention, each working region includes：Work allows area and work Adjust area.

In another embodiment based on said apparatus of the present invention, the working region determining unit, it is specifically used for：

In another embodiment based on said apparatus of the present invention, the operating point determining unit, also particularly useful for：

In another embodiment based on said apparatus of the present invention,

In another embodiment based on said apparatus of the present invention, the anti-surge valve control unit, including：

First judge module, for judging whether the real-time working point of the fluid machinery is located at the instantaneous operating point Place；

Second judge module, for the judged result according to first judge module, in response to the fluid machinery Real-time working point is not located at the instantaneous operating point, judges whether the real-time working point of the fluid machinery is located at the work Allow area；

First execution module, for the judged result according to second judge module, in response to the fluid machinery Real-time working point, which is located at the work, allows area, is opened using loop pid control mode control anti-surge valve is divided；

Second execution module, for the judged result according to second judge module, in response to the fluid machinery Real-time working point is located at work adjustment area, and adoption rate control mode control anti-surge valve is opened.

In another embodiment based on said apparatus of the present invention, each working region also includes：Work wave zone.

In another embodiment based on said apparatus of the present invention, the working region determining unit, also particularly useful for：

In another embodiment based on said apparatus of the present invention, the anti-surge valve control unit, in addition to：

3rd judge module, for the judged result according to second judge module, in response to the fluid machinery Real-time working point, which is not located at the work, allows area, judges whether the real-time working point of the fluid machinery is adjusted positioned at the work Main plot；

Second execution module, specifically for the judged result according to the 3rd judge module, in response to the stream The real-time working point of body machinery is located at work adjustment area, is opened using equal proportion control mode control anti-surge valve；

3rd execution module, for the judged result according to the 3rd judge module, in response to the fluid machinery Real-time working point is located at the work wave zone, is opened using control with changed scale control mode control anti-surge valve.

4th judge module, for judging whether the fluid machinery real-time working point returns to the instantaneous operating point；

4th execution module, for the judged result according to the 4th judge module, in response to the fluid machinery Real-time working point returns to the instantaneous operating point, controls the anti-surge valve to return to initial bit using major loop pid control mode Put；

Second judge module, the judged result according to the 4th judge module is additionally operable to, in response to the fluid The real-time working point of machinery is not returned to the instantaneous operating point, whether performs the real-time working point for judging the fluid machinery Allow the operation in area positioned at the work.

5th judge module, for the judged result according to the 4th judge module, in response to the fluid machinery Real-time working point is not returned to the instantaneous operating point, judges whether the real-time working point of the fluid machinery is located at the fluid machine The left side of anti-surge line in the performance chart of tool；

Second judge module, specifically for the judged result according to the 5th judge module, in response to the stream The real-time working point of body machinery is not located at the left side of anti-surge line, and performing the real-time working point for judging the fluid machinery is The no operation for allowing area positioned at the work.

6th judge module, for the judged result according to the 5th judge module, in response to the fluid machinery Real-time working point is located at the left side of anti-surge line, judges whether the real-time working point of the fluid machinery is located at the fluid machinery Performance chart in surge line left side；

4th execution module, the judged result according to the 6th judge module is additionally operable to, in response to the fluid The real-time working point of machinery is not located at the left side of surge line, controls the anti-surge valve to open using major loop pid control mode；

5th execution module, for the judged result according to the 6th judge module, in response to the fluid machinery Real-time working point is located at the left side of surge line, directly controls the anti-surge valve standard-sized sheet.

In another embodiment based on said apparatus of the present invention, each working region also includes：Dead band, when described real-time When operating point is located in the dead band, it is believed that the real-time working point is located at or returned to the instantaneous operating point.

Another aspect according to embodiments of the present invention, there is provided a kind of control system, including：Fluid machinery and above-mentioned any Anti-surge control device described in one embodiment.

In another embodiment based on said system of the present invention, the fluid machinery is centrifugal compressor.

Based on anti-surge control method provided in an embodiment of the present invention, control device and control system, by detecting convection current The Regulate signal of body machinery, before being changed in the operating point of stream machine machinery but being also not up to performance of expected change, control in advance Anti-surge valve acts, and so as to more directly more effectively carry out Anti-surge Control in advance, reduces the fluctuation of operating point, ensures fluid machine The stable operation of tool, the method i.e. work of convection body machinery when external condition changes a lot provided due to the present embodiment Point is adjusted, thus this method also for effectively control fluid machinery the stability maintenance operation under emergency situations provide it is a kind of possible, And it can also be combined with existing classical anti-surge control method, more effectively safeguard the stable operation of three-dimensional machinery.

Brief description of the drawings

The accompanying drawing of a part for constitution instruction describes embodiments of the invention, and is used to explain together with description The principle of the present invention.

Referring to the drawings, according to following detailed description, the present invention can be more clearly understood, wherein：

Fig. 1 is the flow chart of one embodiment of anti-surge control method of the embodiment of the present invention.

Fig. 2 is the flow chart of another embodiment of anti-surge control method of the embodiment of the present invention.

Fig. 3 is curve map of the centrifugal compressor units in different rotating speeds down-off with changed power.

Fig. 4 is curve map of the centrifugal compressor units in different inlet guide vane aperture down-offs with changed power.

Fig. 5 is the structure chart of one embodiment of anti-surge control device of the embodiment of the present invention.

Fig. 6 is the structure chart of another embodiment of anti-surge control device of the embodiment of the present invention.

Embodiment

The various exemplary embodiments of the present invention are described in detail now with reference to accompanying drawing.It should be noted that：Unless have in addition Body illustrates that the positioned opposite of the parts otherwise illustrated in these embodiments, numerical expression and the unlimited system of numerical value are of the invention Scope.

Simultaneously, it should be appreciated that for the ease of description, the size of the various pieces shown in accompanying drawing is not according to reality Proportionate relationship draw.

The description only actually at least one exemplary embodiment is illustrative to be never used as to the present invention below And its application or any restrictions that use.

It may be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable In the case of, the technology, method and apparatus should be considered as part for specification.

It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi It is defined, then it need not be further discussed in subsequent accompanying drawing in individual accompanying drawing.

Fig. 1 is the flow chart of one embodiment of anti-surge control method of the embodiment of the present invention.As shown in figure 1, the implementation The anti-surge control method of example, including：

S102, the Regulate signal of detection convection body machinery.

Wherein, fluid machinery can be the fluid machineries such as centrifugal compressor, blower fan, pump；The regulation letter of convection body machinery Number it is the Regulate signal that the inlet flow rate of fluid machinery can be caused to change；For example, centrifugal compressor rotating speed or entrance are led The Regulate signal of leaf.

S104, the instantaneous operating point of fluid machinery is determined according to Regulate signal.

In the specific implementation, operation S104 is by judging the performance of expected change amount of the flow of the fluid machinery caused by Regulate signal Whether preparatory condition is met；If the performance of expected change amount of the flow of the fluid machinery caused by Regulate signal meets preparatory condition, Instantaneous operating point is used as using the working condition of current fluid machinery；If the expection of the flow of the fluid machinery caused by Regulate signal Variable quantity is unsatisfactory for preparatory condition, then terminates the anti-surge control method of the present embodiment.

Wherein, preparatory condition can be that the expection reduction amount of the flow of fluid machinery is more than current fluid mechanical inputs flow Pre-set ratio.Such as：The expection reduction amount of the flow of fluid machinery is more than a percentage of current fluid mechanical inputs flow Than.

Specifically, in S104 is operated, if the performance of expected change amount of the flow of fluid machinery caused by Regulate signal meets Preparatory condition, can be by obtaining the inlet and outlet pressure and inlet flow rate data of current fluid machinery, and according to current fluid machine The inlet and outlet pressure and inlet flow rate data of tool, the work shape of current fluid machinery is determined in the performance chart of fluid machinery Position where state, as instantaneous operating point.

S106, each working region of fluid machinery is determined according to preset rules centered on instantaneous operating point.

In a specific example, working region includes：Work allows area and work adjustment area；Operate S106 be specially with Centered on instantaneous operating point, first of the transverse and longitudinal coordinate with instantaneous operating point in the performance chart of fluid machinery is default respectively Ratio is that long semi-minor axis constructs the first elliptical region；Region using in the first elliptical region in addition to instantaneous operating point is used as work Make permission area, area is adjusted using the region outside the first elliptical region as work.

In another specific example, working region includes：Work allows area, work adjustment area and work wave zone, behaviour Make S106 specially centered on instantaneous operating point, respectively the transverse and longitudinal with instantaneous operating point in the performance chart of fluid machinery First pre-set ratio of coordinate is that long semi-minor axis constructs the first elliptical region；Again centered on instantaneous operating point, respectively with wink When transverse and longitudinal coordinate of the operating point in the performance chart of fluid machinery the second pre-set ratio it is ellipse for long semi-minor axis construction second Border circular areas, wherein the second pre-set ratio is more than the first pre-set ratio；With in the first elliptical region in addition to instantaneous operating point Region allows area as work, and the region using in the second elliptical region in addition to the first elliptical region adjusts area as work, Work wave zone is used as using the region outside the second elliptical region.

S108, determine the real-time working point of fluid machinery.

Specifically, operate S108 can by obtain current fluid machinery inlet and outlet pressure and inlet flow rate data, and According to the inlet and outlet pressure and inlet flow rate data of current fluid machinery, current stream is determined in the performance chart of fluid machinery Position where the instantaneous operating conditions of body machinery, as real-time working point.

In the specific implementation, the real-time working point in operation 108 can generally work as fluid by quickly being determined according to shadow technology The working condition of machinery is when fluctuating, can produce it is a series of quickly shine shadow, field engineer can according to actual conditions from In be selected as the quick of instantaneous operating conditions of real-time working point and shine shadow, such as can select first or last quickly shines shadow To adjust point, can also select centre is quickly adjustment point according to shadow.

S110, anti-surge valve is controlled according to position of the real-time working point in each workspace.

In a specific example, when each workspace determined by operation S106 includes：Work allows area and work to adjust Whether Qu Shi, operation S110 first determine whether the real-time working point of fluid machinery at instantaneous operating point；If the reality of fluid machinery When operating point be located at instantaneous operating point, terminate the present embodiment anti-surge hair control method；If the real-time work of fluid machinery Make point to be not located at instantaneous operating point, judge the real-time working point of fluid machinery whether positioned at work permission area；If fluid machinery Real-time working point be located at work and allow area, opened using loop pid control mode control anti-surge valve is divided；If fluid machinery Real-time working point is located at work adjustment area, and adoption rate control mode control anti-surge valve is opened.

In another specific example, when each workspace determined by operation S106 includes：Work allows area, work adjustment When area and work wave zone, operation S110 first determines whether the real-time working point of fluid machinery whether at instantaneous operating point, if The real-time working point of fluid machinery is located at instantaneous operating point, terminates the control method of the anti-surge hair of the present embodiment；If fluid Whether the real-time working point of machinery is not located at instantaneous operating point, judge the real-time working point of fluid machinery and allow positioned at work Area；If the real-time working point of fluid machinery, which is located at work, allows area, beaten using loop pid control mode control anti-surge valve is divided Open；If the real-time working point of fluid machinery, which is not located at work, allows area, judge whether the real-time working point of fluid machinery is located at work Adjust area；If the real-time working point of fluid machinery is located at work adjustment area, anti-surge valve is controlled using equal proportion control mode Open；If the real-time working point of fluid machinery is located at work wave zone, opened using control with changed scale control mode control anti-surge valve.

Anti-surge control method based on the embodiment of the present invention, by detecting the Regulate signal of convection body machinery, Ke Yi Before the operating point of compressor changes but is also not up to performance of expected change, such as the inlet flow rate that centrifugal compressor is rented is due to turning The decline of speed or inlet guide vane aperture reduce when causing the flow to be reduced to 27000Nm3/h by 30000Nm3/h, and control is anti-in advance Surge valve events, so as to more directly more effectively carry out Anti-surge Control in advance, reduce the fluctuation of operating point, ensure fluid machinery Stable operation, due to the present embodiment provide method when external condition changes a lot i.e. convection body machinery operating point It is adjusted, therefore this method is also a kind of possible effectively to control fluid machinery stability maintenance operation under emergency situations to provide, and And can also be combined with existing classical anti-surge control method, more effectively safeguard the stable operation of three-dimensional machinery.

Fig. 2 is the flow chart of another embodiment of anti-surge control method of the embodiment of the present invention.As shown in Fig. 2 and Fig. 1 Embodiment compare, in this embodiment, anti-surge valve is controlled according to position of the real-time working point in each workspace, including：

S212, judge the real-time working point of fluid machinery whether at instantaneous operating point.

If the real-time working point of fluid machinery is located at instantaneous operating point, the subsequent operation of the present embodiment is not performed；Otherwise, If the real-time working point of fluid machinery is not located at instantaneous operating point, operation S214 is performed.

S214, judge the real-time working point of fluid machinery whether positioned at work permission area.

If the real-time working point of fluid machinery, which is located at work, allows area, operation S216 is performed；Otherwise, if the reality of fluid machinery When operating point be not located at work allow area, perform operation S218.

S216, opened using loop pid control mode control anti-surge valve is divided.

S218, judge the real-time working point of fluid machinery whether positioned at work adjustment area.

If the real-time working point of fluid machinery is located at work adjustment area, operation S220 is performed；Otherwise, if the reality of fluid machinery When operating point be located at work wave zone, perform operation S222.

S220, opened using equal proportion control mode control anti-surge valve.

S222, opened using control with changed scale control mode control anti-surge valve.

S224, judges whether the real-time working point of fluid machinery returns to instantaneous operating point.

If the real-time working point of fluid machinery returns to instantaneous operating point, operation S226 is performed；Otherwise, if the reality of fluid machinery When operating point be not returned to instantaneous operating point, perform operation S228.

S226, initial position is returned to using major loop pid control mode control anti-surge valve.

S228, judges whether the real-time working point of fluid machinery is located at anti-surge line in the performance chart of fluid machinery Left side.

If the real-time working point of fluid machinery is not located at the left side of anti-surge line, operation S214 is performed；Otherwise, if fluid machine The real-time working point of tool is located at the left side of anti-surge line, performs operation S230.

S230, judges whether the real-time working point of fluid machinery is located at a left side for surge line in the performance chart of fluid machinery Side.

If the real-time working point of fluid machinery is not located at the left side of surge line, operation S232 is performed；Otherwise, if fluid machinery Real-time working point be located at the left side of surge line, perform operation S234.

S232, opened using major loop pid control mode control anti-surge valve.

S234, directly control anti-surge valve standard-sized sheet.

In the specific implementation, divide loop pid control mode from major loop pid control mode to be different control modes, both Specific control parameter it is different.

Anti-surge control method based on the embodiment of the present invention, by detecting the Regulate signal of convection body machinery, Ke Yi Before the operating point of compressor changes but is also not up to performance of expected change, anti-surge valve is controlled to open in advance, so as to more directly more It is effective to carry out Anti-surge Control in advance, reduce the fluctuation of operating point, ensure the stable operation of fluid machinery, and return in operating point Control anti-surge valve returns to initial position after being transferred to position, and when operating point is not adjusted back in place and is located at the left side of surge line, directly Control anti-surge valve standard-sized sheet is connect, and when operating point is not adjusted back in place and between surge line and anti-surge line, controlled using PID Mode processed controls anti-surge valve to open.

In the various embodiments described above, each working region also includes：Dead band, when real-time working point is located in dead band, it is believed that Real-time working point is located at or returned to instantaneous operating point.

In a specific embodiment, fluid machinery be using steam turbine or frequency control motor as prime mover from Core type compressor set, the rotating speed of centrifugal compressor units can be adjusted, when centrifugal compressor units reach working speed area When, the load of downstream production technology is adapted to by the rotating speed of Regulate signal regulation centrifugal compressor units, can generally be passed through PID is carried out using the outlet pressure of centrifugal compressor units or inlet flow rate as technological parameter to reconcile to realize.

Specifically, when the manufacturing technique requirent in centrifugal compressor units downstream reduces production capacity or low load operation, lead to It often may require that the outlet pressure for reducing centrifugal compressor units meets technological requirement, specifically can be by reducing centrifugal compressor The rotating speed of unit reaches this purpose.Such as：When needing the outlet pressure of centrifugal compressor units by actual value PV=0.8MPa (G) when changing to setting value SP=0.6MPa (G), the rotating speed of compressor set can be passed through by current rotating speed SPEED=8000RPM PID, which is calculated, gradually to be reduced, and when PV=SP, it is constant that the rotating speed of compressor set will be maintained at current rotating speed；If PV is always More than SP, the rotating speed of compressor set can then be reduced to the lower limit 6000RPM in working speed section, wherein working speed section always For 9000RPM to 6000RPM.When the manufacturing technique requirent in centrifugal compressor units downstream increases production capacity or high loaded process When, it will usually it is required that the outlet pressure of increase centrifugal compressor units meets technological requirement, it can specifically pass through and improve centrifugation The rotating speed of formula compressor set reaches this purpose.Such as：When needing the outlet pressure of centrifugal compressor units by actual value PV= When 0.6MPa (G) changes to setting value SP=0.8MPa (G), the rotating speed of compressor set can be by current rotating speed SPEED= 7000RPM is calculated by PID and gradually risen, and when PV=SP, it is constant that the rotating speed of compressor set will be maintained at current rotating speed； If PV is less than SP always, the rotating speed of compressor set can then be increased to the upper limit 9000RPM in working speed section, wherein work always It is 9000RPM to 6000RPM to make rotating speed section.So as to realize the normal production technology of centrifugal compressor units by adjusting rotating speed Regulation.Wherein, the change of centrifugal compressor units rotating speed can bring influence, centrifugal pressure to the flow of compressor set gateway The rotating speed rise of contracting unit, flow increase, on the contrary rotating speed reduces, and flow can accordingly reduce.

So when adjusting the rotating speed of centrifugal compressor units by Regulate signal to adapt to the load of downstream production technology, When the rotating speed of compressor set instantaneously reduces, such as rotating speed instantaneously reduces 200RPM, and centrifugal compressor units are turned by detection The Regulate signal of speed, before being changed in the operating point of compressor but being also not up to performance of expected change, anti-surge is controlled in advance Valve is opened, and so as to more directly more effectively carry out Anti-surge Control in advance, anti-asthma is opened due to declining in compressor set rotating speed Shake valve, can also eliminate or reduce due to centrifugal compressor units inlet flow rate change it is too fast and caused by compressor set operating mode not The influence of stable operation, compressor set stabilization of operating point is safeguarded, ensure the smooth transition of compressor set load variations.

Specifically, as shown in figure 3, Fig. 3 is curve of the centrifugal compressor units in different rotating speeds down-off with changed power Figure, wherein 5 points of A, B, C, D, E represents compressor set in 3349RPM, 3611RPM, 3767RPM, 4186RPM, 4395RPM respectively The corresponding flow limit point that surge occurs under rotating speed, the limit point of these flows together constitutes flow limit line, by figure It can be seen that when rotating speed gradually reduces, the limit flow of flow limit line also reduces therewith, therefore can be first by flow limit line Step is extrapolated when compressor set rotating speed declines suddenly, and the expection reduction amount of flow is how many.Such as when rotating speed is in 4000RPM When, 3800RPM is suddenly fallen to, with reference to curve corresponding between C, D point, curvilinear equation can be obtained by the coordinate of C, D point, Can tentatively it be calculated using the difference of the rotating speed flow corresponding in 4000RPM and the rotating speed flow corresponding in 3800RPM The expection reduction amount of outflow.

The expection reduction amount for the compressor set flow caused by rotating speed for adjusting compressor set according to Regulate signal, which is more than, to be worked as One percentage of preceding compressor set inlet flow rate, such as the compression caused by the inlet guide vane of Regulate signal regulation compressor set The expection reduction amount of unit flow is that 1000Nm3/h more than current compression unit inlet flow rate is the 5% of 10000Nm3/h, is obtained The significant datas such as inlet and outlet pressure, inlet flow rate and the temperature of current compression unit, according to these data compressor set property The position where the working condition of current compression unit is determined in energy curve map, as instantaneous operating point.

Centered on this instantaneous operating point, the horizontal seat with this instantaneous operating point in the performance chart of compressor set respectively The 3% of target 3% and ordinate constructs the first elliptical region for long semi-minor axis, with the first elliptical region except instantaneous work Region outside point allows area as work, can as receive the scope of Point Drifting, is considered as normal operating point fluctuation；With Centered on this instantaneous operating point, respectively with 8% He of this abscissa of the instantaneous operating point in the performance chart of compressor set 8% distance of ordinate is that Y-axis radius is that long semi-minor axis constructs the second elliptical region, with the second elliptical region except the Region outside one elliptical region is made as work adjustment area, cannot as receive the scope of Point Drifting, but deviate not It is excessive, area can be allowed to make operating point return to work by micro-adjustment；Work is used as using the region outside the second elliptical region Make wave zone, the scope of significant fluctuations occurs for as operating point, can have a strong impact on the stable operation of compressor set.By proposing this Three regions can more accurately control anti-surge valve, anti-surge valve is rapidly responded, when real-time working point falls into this During three different regions, different control strategies can be selected anti-surge valve is controlled.

Specifically, when real-time working point offsets instantaneous operating point for these reasons to be moved to the left, no-load voltage ratio can be passed through Example control mode control anti-surge valve is opened, such as the variable delta that control with changed scale controls is 10% to 1%, the change of variable delta The speed of instantaneous operating point can be offset according to real-time working point from adding or subtracting certainly, the change speed of operating point is adapted to this； When real-time working point offsets instantaneous operating point for these reasons to be moved to the left, can be controlled by equal proportion control mode anti- Surge valve is opened, such as the equivalent increment that control of equal proportion is 5%, equivalent increment can set it is larger can also set compared with It is small, it can specifically be determined according to the control program selected by field engineer；When real-time working point is offset instantaneously for these reasons , can be by dividing loop pid control mode to control anti-surge valve to open, by taking abscissa as an example, instantaneously when operating point is moved to the left The abscissa of operating point is SP, and the abscissa of real-time working point is PV, is adjusted by PID computing, by taking ordinate as an example, The ordinate of instantaneous operating point is SP, and the ordinate of real-time working point is PV, is adjusted by PID computing, specific implementation When can also to the output quantity of abscissa and ordinate carry out Gao Xuan, the wherein setting of P, I parameter can be according to field engineer Selected control program determines.Three of the above control mode, field engineer can flexibly be selected according to actual conditions, with Ask and be optimal matching.

For example, when real-time working point falls into work wave zone, control with changed scale control mode can be used, so can be by work The position for making point quickly retracts the region of permission；When real-time working point falls into work adjustment area, equal proportion can be used to control Mode, the position of operating point is micro-adjusted in a manner of being approached by small step；Allow area when real-time working point falls into work When, pid control mode can be used, by the setting for the point coordinates that instantaneously works, to be adjusted to the position of real-time working point, The position for making real-time working point return to before fluctuation.

In another specific embodiment, fluid machinery is constant rotational speed and entrance is adjusted with stator centrifugal compressor Group, the inlet guide vane of centrifugal compressor units can be adjusted, and when centrifugal compressor units run well, be believed by adjusting The position of number regulation centrifugal compressor units inlet guide vane adapts to the load of downstream production technology, generally can be by centrifuge The outlet pressure or inlet flow rate of formula compressor set carry out PID as technological parameter and reconciled to realize.

Specifically, when the manufacturing technique requirent in centrifugal compressor units downstream reduces production capacity or low load operation, lead to It often may require that the outlet pressure for reducing centrifugal compressor units meets technological requirement, specifically can be by reducing centrifugal compressor The inlet guide vane aperture of unit reaches this purpose.Such as：When needing the outlet pressure of centrifugal compressor units by actual value PV When=0.7MPa (G) changes to setting value SP=0.5MPa (G), the inlet guide vane aperture of compressor set can be by current aperture CV =80% calculates gradually reduction by PID, and when PV=SP, the inlet guide vane aperture of compressor set maintains current aperture It is constant；If PV is more than SP always, the inlet guide vane aperture of compressor set can then be decreased to inlet guide vane aperture section always Lower limit 10%, wherein inlet guide vane aperture section are 100% to 10%.When the manufacturing technique requirent in centrifugal compressor units downstream Increase production capacity or during high loaded process, it will usually require to increase the outlet pressure of compressor to meet technological requirement, specifically may be used To reach this purpose by increasing the inlet guide vane aperture of centrifugal compressor units.Such as：When needing centrifugal compressor units Outlet pressure when changing to setting value SP=0.7MPa (G) by actual value PV=0.5MPa (G), the inlet guide vane of compressor set Aperture can calculate gradually increase, when PV=SP, the inlet guide vane of compressor set by current aperture CV=40% by PID It is constant that aperture will be maintained at current aperture；If PV is less than SP always, the inlet guide vane aperture of compressor set can then increase always Greatly to the upper limit 100% in inlet guide vane aperture section, wherein inlet guide vane aperture section is 100% to 10%.Adjusted so as to pass through Section inlet guide vane aperture realizes the regulation of the normal production technology of centrifugal compressor units.Wherein, centrifugal compressor units entrance The change of guide vane opening can bring influence to compressor set gateway flow, and the inlet guide vane aperture of centrifugal compressor units increases Greatly, flow increases, otherwise inlet guide vane aperture reduces, and flow can accordingly reduce.

So adapt to downstream production technology in the inlet guide vane aperture that centrifugal compressor units are adjusted by Regulate signal Load when, when the inlet guide vane aperture of compressor set instantaneously reduces, such as inlet guide vane aperture instantaneously reduces 10%, passes through inspection The Regulate signal to the inlet guide vane of centrifugal compressor units is surveyed, can change in the operating point of compressor but also be not up to Before performance of expected change, anti-surge valve is opened in advance, so as to more directly more effectively carry out Anti-surge Control in advance, due in compressor Group inlet guide vane aperture, which reduces, opens anti-surge valve, can also eliminate or reduce centrifugal compressor units inlet flow rate and change The influence of compressor set operating mode irregular operation caused by fast, safeguards compressor set stabilization of operating point, ensures compressor set load The smooth transition of change.

Specifically, as shown in figure 4, Fig. 4 becomes for centrifugal compressor units in different inlet guide vane aperture down-offs with power The curve map of change, wherein 5 points of inlet guide vanes for representing compressor set respectively of A, B, C, D, E at 60 degree, 40 degree, 20 degree, 0 degree ,- The corresponding flow limit point that surge occurs, the limit point of these flows together constitute flow limit line during 20 degree of positions, by Visible in figure, when inlet guide vane aperture reduces, the limit flow of flow limit line also reduces therewith, therefore passes through flow limit Line can be extrapolated tentatively when compressor set inlet guide vane aperture reduces suddenly, and the expection reduction amount of flow is how many.Such as When inlet guide vane position is at 45 degree, unexpected inlet guide vane position changes to 55 degree, with reference to curve corresponding between A, B point, leads to Curvilinear equation can be obtained by crossing the coordinate of A, B point, utilize inlet guide vane position flow corresponding at 45 degree and inlet guide vane position The expection reduction amount of outflow can tentatively be calculated by putting the difference of the flow corresponding at 55 degree.

The expection reduction amount for the compressor set flow caused by inlet guide vane for adjusting compressor set according to Regulate signal is big In a percentage of current compression unit inlet flow rate, such as caused by the inlet guide vane of Regulate signal regulation compressor set The expection reduction amount of compressor set flow is that 1000Nm3/h more than current compression unit inlet flow rate is the 5% of 10000Nm3/h, The significant datas such as inlet and outlet pressure, inlet flow rate and the temperature of current compression unit are obtained, according to these data in compressor set Performance chart in determine current compression unit working condition where position, as instantaneous operating point.

Centered on this instantaneous operating point, the horizontal seat with this instantaneous operating point in the performance chart of compressor set respectively The 2% of target 2% and ordinate constructs the first elliptical region for long semi-minor axis, with the first elliptical region except instantaneous work Region outside point allows area as work, can as receive the scope of Point Drifting, is considered as normal operating point fluctuation；With Centered on this instantaneous operating point, respectively with 7% He of this abscissa of the instantaneous operating point in the performance chart of compressor set 7% distance of ordinate is that Y-axis radius is that long semi-minor axis constructs the second elliptical region, with the second elliptical region except the Region outside one elliptical region is made as work adjustment area, cannot as receive the scope of Point Drifting, but deviate not It is excessive, area can be allowed to make operating point return to work by micro-adjustment；Work is used as using the region outside the second elliptical region Make wave zone, the scope of significant fluctuations occurs for as operating point, can have a strong impact on the stable operation of compressor set.By proposing this Three regions can more accurately control anti-surge valve, anti-surge valve is rapidly responded, when real-time working point falls into this During three different regions, different control strategies can be selected anti-surge valve is controlled.

Specifically, when real-time working point offsets instantaneous operating point for these reasons to be moved to the left, no-load voltage ratio can be passed through Example control mode control anti-surge valve is opened, such as the variable delta that control with changed scale controls is 10% to 1%, the change of variable delta The speed of instantaneous operating point can be offset according to real-time working point from adding or subtracting certainly, the change speed of operating point is adapted to this； When real-time working point offsets instantaneous operating point for these reasons to be moved to the left, can be controlled by equal proportion control mode anti- Surge valve is opened, such as the equivalent increment that control of equal proportion is 4%, equivalent increment can set it is larger can also set compared with It is small, it can specifically be determined according to the control program selected by field engineer；When real-time working point is offset instantaneously for these reasons , can be by dividing loop pid control mode to control anti-surge valve to open, by taking abscissa as an example, instantaneously when operating point is moved to the left The abscissa of operating point is SP, and the abscissa of real-time working point is PV, is adjusted by PID computing, by taking ordinate as an example, The ordinate of instantaneous operating point is SP, and the ordinate of real-time working point is PV, is adjusted by PID computing, specific implementation When can also to the output quantity of abscissa and ordinate carry out Gao Xuan, the wherein setting of P, I parameter can be according to field engineer Selected control program determines.Three of the above control mode, field engineer can flexibly be selected according to actual conditions, with Ask and be optimal matching.

In above-mentioned specific embodiment, Anti-surge Control, which can use, quickly shines shadow technology, generally when ripple occurs for operating point Can be produced when dynamic it is a series of it is quick shine shadow, therefore can be showed by quickly obtaining instantaneous operating point and real-time working point according to shadow Engineer can select to need the operating point that adjust according to actual conditions, for example, can select first or last according to shadow work The operating point that point adjusts as needs, the middle operating point adjusted according to shadow point for needs can also be selected.

Control anti-surge valve to open by the above method, effectively, little by little, quantitatively the expected of flow can be reduced Amount is supplemented, and maintains operating point near original position, so as to ensure the stable operation of compressor set.

Fig. 5 is the structure chart of one embodiment of anti-surge control device of the embodiment of the present invention.As shown in figure 5, the implementation The anti-surge control device of example includes：Regulate signal detection unit, operating point determining unit, working region determining unit and anti-asthma Shake valve control unit, VCU.Wherein,

Regulate signal detection unit, for detecting the Regulate signal of convection body machinery.

Operating point determining unit, for determining the instantaneous operating point of fluid machinery according to Regulate signal；And determine fluid The real-time working point of machinery.

In the specific implementation, operating point determining unit, is specifically used for：By judging the fluid machinery caused by Regulate signal Whether the performance of expected change amount of flow meets preparatory condition；If the performance of expected change amount of the flow of the fluid machinery caused by Regulate signal Meet preparatory condition, then instantaneous operating point is used as using the working condition of current fluid machinery；If the fluid caused by Regulate signal The performance of expected change amount of the flow of machinery is unsatisfactory for preparatory condition, then terminates the anti-surge control method of the present embodiment.

Specifically, if the performance of expected change amount of the flow of fluid machinery caused by Regulate signal meets preparatory condition, work Point determining unit can be by obtaining the inlet and outlet pressure and inlet flow rate data of current fluid machinery, and according to current fluid machine The inlet and outlet pressure and inlet flow rate data of tool, the work shape of current fluid machinery is determined in the performance chart of fluid machinery Position where state, as instantaneous operating point.

Specifically, the inlet and outlet pressure and inlet flow rate that operating point determining unit can also be mechanical by obtaining current fluid Data, and according to the inlet and outlet pressure and inlet flow rate data of current fluid machinery, it is true in the performance chart of fluid machinery Position where the instantaneous operating conditions of settled preceding fluid machinery, as real-time working point.

Working region determining unit, for determining each work of fluid machinery according to preset rules centered on instantaneous operating point Make region.

In a specific example, working region includes：Work allows area and work adjustment area；Working region determining unit It is specifically used for：Centered on instantaneous operating point, sat respectively with transverse and longitudinal of the instantaneous operating point in the performance chart of fluid machinery The pre-set ratio of target first is that long semi-minor axis constructs the first elliptical region；With in the first elliptical region in addition to instantaneous operating point Region as work allow area, using the region outside the first elliptical region as work adjustment area.

In another specific example, working region includes：Work allows area, work adjustment area and work wave zone；Work It is specifically used for as area determination unit：It is bent in the performance of fluid machinery with instantaneous operating point respectively centered on instantaneous operating point First pre-set ratio of the transverse and longitudinal coordinate in line chart is that long semi-minor axis constructs the first elliptical region；Again using instantaneous operating point in The heart, the second pre-set ratio of the transverse and longitudinal coordinate using instantaneous operating point in the performance chart of fluid machinery is long semi-minor axis respectively The second elliptical region is constructed, wherein the second pre-set ratio is more than the first pre-set ratio；It is instantaneous to be removed in the first elliptical region Region outside operating point allows area as work, and the region using in the second elliptical region in addition to the first elliptical region is used as work Area is adjusted, work wave zone is used as using the region outside the second elliptical region.

Anti-surge valve control unit, for controlling anti-surge valve according to position of the real-time working point in each workspace.

In a specific example, when each workspace includes determined by the determining unit of working region：Work allow area and During work adjustment area, anti-surge valve control unit first determines whether the real-time working point of fluid machinery is located at instantaneous operating point Place；If the real-time working point of fluid machinery is located at instantaneous operating point, terminate the control method of the anti-surge hair of the present embodiment；If The real-time working point of fluid machinery is not located at instantaneous operating point, judges whether the real-time working point of fluid machinery is permitted positioned at work Xu Qu；If the real-time working point of fluid machinery, which is located at work, allows area, beaten using loop pid control mode control anti-surge valve is divided Open；If the real-time working point of fluid machinery is located at work adjustment area, adoption rate control mode control anti-surge valve is opened.

In another specific example, when each workspace determined by the determining unit of working region includes：Work permission area, When work adjustment area and work wave zone, anti-surge valve control unit first determines whether the real-time working point of fluid machinery is located at At instantaneous operating point, if the real-time working point of fluid machinery is located at instantaneous operating point, terminate the anti-surge hair of the present embodiment Control method；If the real-time working point of fluid machinery is not located at instantaneous operating point, judging the real-time working point of fluid machinery is It is no to allow area positioned at work；If the real-time working point of fluid machinery is located at work and allows area, using dividing loop pid control mode control Anti-surge valve processed is opened；If the real-time working point of fluid machinery, which is not located at work, allows area, the real-time working of fluid machinery is judged Whether point is positioned at work adjustment area；If the real-time working point of fluid machinery is located at work adjustment area, using equal proportion control mode Anti-surge valve is controlled to open；If the real-time working point of fluid machinery is located at work wave zone, controlled using control with changed scale control mode Anti-surge valve is opened.

Anti-surge control device based on the embodiment of the present invention, by detecting the Regulate signal of convection body machinery, Ke Yi Before the operating point of stream machine machinery changes but is also not up to performance of expected change, anti-surge valve action is controlled in advance, so as to more direct Anti-surge Control is more effectively carried out in advance, is reduced the fluctuation of operating point, is ensured the stable operation of fluid machinery, due to this implementation The method that example provides operating point of i.e. convection body machinery when external condition changes a lot is adjusted, therefore this method is also For effectively control fluid machinery under emergency situations stability maintenance operation provide it is a kind of may, and can also with it is existing classical anti- Surge controlling method combines, and more effectively safeguards the stable operation of three-dimensional machinery.

Fig. 6 is the structure chart of another embodiment of anti-surge control device of the embodiment of the present invention.As shown in fig. 6, and Fig. 5 Embodiment compare, in this embodiment, anti-surge valve control unit includes：First judge module, the second judge module, the 3rd Judge module, the 4th judge module, the 5th judge module, the 6th judge module, the first execution module, the second execution module, Three execution modules, the 4th execution module and the 5th execution module.Wherein,

First judge module, for judging the real-time working point of fluid machinery whether at instantaneous operating point.

Second judge module, for the judged result according to the first judge module, in response to the real-time working of fluid machinery Whether point is not located at instantaneous operating point, judge the real-time working point of fluid machinery positioned at work permission area；And according to the 5th The judged result of judge module, the left side of anti-surge line is not located in response to the real-time working point of fluid machinery, performs and judges stream Whether the real-time working point of body machinery allows the operation in area positioned at work.

3rd judge module, for the judged result according to the second judge module, in response to the real-time working of fluid machinery Whether point, which is not located at work, allows area, judge the real-time working point of fluid machinery positioned at work adjustment area.

4th judge module, for judging whether the real-time working point of fluid machinery returns to instantaneous operating point.

5th judge module, for the judged result according to the 4th judge module, in response to the real-time working of fluid machinery Point is not returned to instantaneous operating point, judges whether the real-time working point of fluid machinery is located at anti-asthma in the performance chart of fluid machinery Shake the left side of line.

6th judge module, for the judged result according to the 5th judge module, in response to the real-time working of fluid machinery Point judges whether the real-time working point of fluid machinery is located at the performance chart Zhong chuan of fluid machinery positioned at the left side of anti-surge line Shake the left side of line.

First execution module, for the judged result according to the second judge module, in response to the real-time working of fluid machinery Point allows area positioned at work, is opened using loop pid control mode control anti-surge valve is divided.

Second execution module, for the judged result according to the 3rd judge module, in response to the real-time working of fluid machinery Point is opened positioned at work adjustment area using equal proportion control mode control anti-surge valve.

3rd execution module, for the judged result according to the 3rd judge module, in response to the real-time working of fluid machinery Point is located at work wave zone, is opened using control with changed scale control mode control anti-surge valve.

4th execution module, for the judged result according to the 4th judge module, in response to the real-time working of fluid machinery Point returns to instantaneous operating point, and initial position is returned to using major loop pid control mode control anti-surge valve；And sentence according to the 6th The judged result of disconnected module, the left side of surge line is not located in response to the real-time working point of fluid machinery, is controlled using major loop PID Mode processed controls anti-surge valve to open.

5th execution module, for the judged result according to the 6th judge module, in response to the real-time working of fluid machinery Point directly controls anti-surge valve standard-sized sheet positioned at the left side of surge line.

Anti-surge control device based on the embodiment of the present invention, by detecting the Regulate signal of convection body machinery, Ke Yi Before the operating point of compressor changes but is also not up to performance of expected change, anti-surge valve is controlled to open in advance, so as to more directly more It is effective to carry out Anti-surge Control in advance, reduce the fluctuation of operating point, ensure the stable operation of fluid machinery, and return in operating point Control anti-surge valve returns to initial position after being transferred to position, and when operating point is not adjusted back in place and is located at the left side of surge line, directly Control anti-surge valve standard-sized sheet is connect, and when operating point is not adjusted back in place and between surge line and anti-surge line, controlled using PID Mode processed controls anti-surge valve to open.

In addition, the embodiment of the present invention additionally provides a kind of control system, including：Fluid machinery and any of the above-described embodiment Anti-surge control device.

In the specific implementation, fluid machinery can be the fluid machineries such as centrifugal compressor, blower fan, pump.

Control system based on the embodiment of the present invention, the anti-surge control device provided with any of the above-described embodiment, it passes through The Regulate signal of convection body machinery is detected, before being changed in the operating point of compressor but being also not up to performance of expected change, in advance Anti-surge valve action is first controlled, so as to more directly more effectively carry out Anti-surge Control in advance, reduces the fluctuation of operating point, ensures The stable operation of fluid machinery, i.e. convection body is mechanical when external condition changes a lot for the method provided due to the present embodiment Operating point be adjusted, therefore this method also for effectively control fluid machinery under emergency situations stability maintenance operation provide one kind May, and can also be combined with existing classical anti-surge control method, more effectively safeguard the stable operation of three-dimensional machinery.

The embodiments of the invention provide following technical scheme：

1st, a kind of anti-surge control method, including：

Detect the Regulate signal of convection body machinery；

Determine the real-time working point of the fluid machinery；

2nd, the method according to 1, the instantaneous operating point that the fluid machinery is determined according to the Regulate signal, bag Include：

3rd, the method according to 2, the preparatory condition include：The expection reduction amount of the flow of the fluid machinery is more than The pre-set ratio of presently described fluid machinery inlet flow rate.

4th, the method according to 3, the working condition using presently described fluid machinery are used as instantaneous operating point, bag Include：

5th, the method according to 4, each working region include：Work allows area and work adjustment area.

6th, the method according to 5, it is described to determine the fluid according to preset rules centered on the instantaneous operating point Each working region of machinery, including：

7th, the method according to 6, the real-time working point for determining the fluid machinery, including：

8th, the method according to 7, the position control according to the real-time working point in each workspace are anti- Surge valve, including：

9th, the method according to 8, each working region also include：Work wave zone.

10th, the method according to 9, it is described to determine the fluid according to preset rules centered on the instantaneous operating point Each working region of machinery, in addition to：

11st, the method according to 10, the adoption rate control mode control anti-surge valve are opened, in addition to：

12nd, the method according to 8 to 11 any one, it is described according to the real-time working point in each workspace Position control anti-surge valve, in addition to：

Judge whether the real-time working point of the fluid machinery returns to the instantaneous operating point；

13rd, the method according to 12, the position control according to the real-time working point in each workspace Anti-surge valve, in addition to：

14th, the method according to 1 to 13 any one, each working region also include：Dead band, when the real-time work When making point in the dead band, it is believed that the real-time working point is located at or returned to the instantaneous operating point.

15th, a kind of anti-surge control device, including：

16th, the device according to 15, the operating point determining unit, is specifically used for：

17th, the device according to 16, the preparatory condition include：The expection reduction amount of the flow of the fluid machinery is big In the pre-set ratio of presently described fluid machinery inlet flow rate.

18th, the device according to 17, if the performance of expected change amount of the flow of fluid machinery caused by the Regulate signal Meet preparatory condition, the operating point determining unit is specifically used for：

19th, the device according to 18, each working region include：Work allows area and work adjustment area.

20th, the device according to 19, the working region determining unit, is specifically used for：

21st, the method according to 20, the operating point determining unit, also particularly useful for：

22nd, the device according to 21, the anti-surge valve control unit, including：

23rd, the device according to 22, each working region also include：Work wave zone.

24th, the device according to 23, the working region determining unit, also particularly useful for：

25th, the device according to 24, the anti-surge valve control unit, in addition to：

26th, the device according to 22 to 25 any one, the anti-surge valve control unit, in addition to：

4th judge module, for judging whether the real-time working point of the fluid machinery returns to the instantaneous operating point；

27th, the device according to 26, the anti-surge valve control unit, in addition to：

28th, the device according to 15 to 27 any one, each working region also include：Dead band, when described real-time When operating point is located in the dead band, it is believed that the real-time working point is located at or returned to the instantaneous operating point.

29th, a kind of control system, including：Fluid machinery and the anti-surge control device according to 15 to 28 any one.

30th, the system according to 29, the fluid machinery are centrifugal compressor.

Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and its The difference of its embodiment, same or analogous part cross-reference between each embodiment.For device embodiment For, because it is substantially corresponding with embodiment of the method, so description is fairly simple, referring to the portion of embodiment of the method in place of correlation Defend oneself bright.

Description of the invention provides for the sake of example and description, and is not exhaustively or by the present invention It is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Select and retouch State embodiment and be to more preferably illustrate the principle and practical application of the present invention, and one of ordinary skill in the art is managed The present invention is solved so as to design the various embodiments with various modifications suitable for special-purpose.

Claims

A kind of 1. anti-surge control method, it is characterised in that including：

Detect the Regulate signal of convection body machinery；

The instantaneous operating point of the fluid machinery is determined according to the Regulate signal；

Each working region of the fluid machinery is determined according to preset rules centered on the instantaneous operating point；

Determine the real-time working point of the fluid machinery；

Anti-surge valve is controlled according to position of the real-time working point in each workspace；

Wherein, the instantaneous operating point that the fluid machinery is determined according to the Regulate signal, including：

Judge whether the performance of expected change amount of the flow of the fluid machinery caused by the Regulate signal meets preparatory condition；

If the performance of expected change amount of the flow of the fluid machinery caused by the Regulate signal meets preparatory condition, with current institute The working condition of fluid machinery is stated as instantaneous operating point.
2. according to the method for claim 1, it is characterised in that the preparatory condition includes：The flow of the fluid machinery Expection reduction amount be more than pre-set ratio presently described fluid machinery inlet flow rate.
3. according to the method for claim 2, it is characterised in that the working condition using presently described fluid machinery as Instantaneous operating point, including：

Obtain the inlet and outlet pressure and inlet flow rate data of presently described fluid machinery；

According to the inlet and outlet pressure of presently described fluid machinery and inlet flow rate data, in the performance chart of the fluid machinery Position where the middle working condition for determining presently described fluid machinery, as instantaneous operating point.
4. according to the method for claim 3, it is characterised in that each working region includes：Work allows area and work Adjust area.
5. according to the method for claim 4, it is characterised in that it is described centered on the instantaneous operating point according to default rule Each working region of the fluid machinery is then determined, including：

Centered on the instantaneous operating point, respectively with the instantaneous operating point in the performance chart of the fluid machinery First pre-set ratio of transverse and longitudinal coordinate is that long semi-minor axis constructs the first elliptical region；To remove institute in first elliptical region The region stated outside instantaneous operating point allows area as work, is adjusted using the region outside first elliptical region as work Area.
6. according to the method for claim 5, it is characterised in that the real-time working point for determining the fluid machinery, bag Include：

Obtain the inlet and outlet pressure and inlet flow rate data of presently described fluid machinery；

According to the inlet and outlet pressure of presently described fluid machinery and inlet flow rate data, in the performance chart of the fluid machinery Position where the middle instantaneous operating conditions for determining presently described fluid machinery, as real-time working point.
7. according to the method for claim 6, it is characterised in that it is described according to the real-time working point in each workspace In position control anti-surge valve, including：

Judge the real-time working point of the fluid machinery whether at the instantaneous operating point；

If the real-time working point of the fluid machinery is not located at the instantaneous operating point, the real-time work of the fluid machinery is judged Whether make point positioned at work permission area；

If the real-time working point of the fluid machinery, which is located at the work, allows area, using dividing, loop pid control mode control is anti- Surge valve is opened；If the real-time working point of the fluid machinery is located at work adjustment area, the control of adoption rate control mode Anti-surge valve is opened.
8. according to the method for claim 7, it is characterised in that each working region also includes：Work wave zone.
9. according to the method for claim 8, it is characterised in that it is described centered on the instantaneous operating point according to default rule Each working region of the fluid machinery is then determined, in addition to：

Centered on the instantaneous operating point, respectively with the instantaneous operating point in the performance chart of the fluid machinery Second pre-set ratio of transverse and longitudinal coordinate is that long semi-minor axis constructs the second elliptical region, wherein second pre-set ratio is more than institute State the first pre-set ratio；Region using in second elliptical region in addition to first elliptical region adjusts as work Area, work wave zone is used as using the region outside second elliptical region.
10. according to the method for claim 9, it is characterised in that the adoption rate control mode control anti-surge valve is beaten Open, in addition to：

If the real-time working point of the fluid machinery, which is not located at the work, allows area, the real-time working of the fluid machinery is judged Whether point is positioned at work adjustment area；

If the real-time working point of the fluid machinery is located at work adjustment area, anti-surge is controlled using equal proportion control mode Valve is opened；If the real-time working point of the fluid machinery is located at the work wave zone, controlled using control with changed scale control mode anti- Surge valve is opened.
11. according to the method described in claim 7 to 10 any one, it is characterised in that described according to the real-time working point Position control anti-surge valve in each workspace, in addition to：

Judge whether the real-time working point of the fluid machinery returns to the instantaneous operating point；

If the real-time working point of the fluid machinery returns to the instantaneous operating point, institute is controlled using major loop pid control mode State anti-surge valve and return to initial position；If the real-time working point of the fluid machinery is not returned to the instantaneous operating point, judge to flow Whether the real-time working point of body machinery is located at the left side of anti-surge line in the performance chart of fluid machinery, if the reality of fluid machinery When operating point be not located at the left side of anti-surge line, perform described in whether the real-time working point for judging the fluid machinery be located at Work allows the operation in area.
12. according to the method for claim 11, it is characterised in that described respectively to be worked described according to the real-time working point Position control anti-surge valve in area, in addition to：

If the real-time working point of the fluid machinery is not returned to the instantaneous operating point, the real-time working of the fluid machinery is judged Whether point is located at the left side of anti-surge line in the performance chart of the fluid machinery；

If the real-time working point of the fluid machinery is not located at the left side of anti-surge line, the judgement fluid machinery is performed Whether real-time working point allows the operation in area positioned at the work；If the real-time working point of the fluid machinery is located at anti-surge line Left side, judge the fluid machinery real-time working point whether in the performance chart of the fluid machinery surge line Left side；

If the real-time working point of the fluid machinery is not located at the left side of surge line, institute is controlled using major loop pid control mode State anti-surge valve opening；If the real-time working point of the fluid machinery is located at the left side of surge line, the anti-surge is directly controlled Valve standard-sized sheet.
13. according to the method for claim 12, it is characterised in that each working region also includes：Dead band, when the reality When operating point when being located in the dead band, it is believed that the real-time working point is located at or returned to the instantaneous operating point.
A kind of 14. anti-surge control device, it is characterised in that including：

Regulate signal detection unit, for detecting the Regulate signal of convection body machinery；

Operating point determining unit, for determining the instantaneous operating point of the fluid machinery according to the Regulate signal；And determine The real-time working point of the fluid machinery；

Working region determining unit, for determining the fluid machinery according to preset rules centered on the instantaneous operating point Each working region；

Anti-surge valve control unit, for controlling anti-surge according to position of the real-time working point in each workspace Valve；

Wherein, the operating point determining unit, is specifically used for：

Judge whether the performance of expected change amount of the flow of the fluid machinery caused by the Regulate signal meets preparatory condition；

If the performance of expected change amount of the flow of the fluid machinery caused by the Regulate signal meets preparatory condition, with current institute The working condition of fluid machinery is stated as instantaneous operating point.
15. device according to claim 14, it is characterised in that the preparatory condition includes：The stream of the fluid machinery The expection reduction amount of amount is more than the presently described fluid machinery inlet flow rate of pre-set ratio.
16. device according to claim 15, it is characterised in that if the stream of the fluid machinery caused by the Regulate signal The performance of expected change amount of amount meets preparatory condition, and the operating point determining unit is specifically used for：

Obtain the inlet and outlet pressure and inlet flow rate data of presently described fluid machinery；

According to the inlet and outlet pressure of presently described fluid machinery and inlet flow rate data, in the performance chart of the fluid machinery Position where the middle working condition for determining presently described fluid machinery, as instantaneous operating point.
17. device according to claim 16, it is characterised in that each working region includes：Work allows Qu Hegong Adjust area.
18. device according to claim 17, it is characterised in that the working region determining unit, be specifically used for：

Centered on the instantaneous operating point, respectively with the instantaneous operating point in the performance chart of the fluid machinery First pre-set ratio of transverse and longitudinal coordinate is that long semi-minor axis constructs the first elliptical region；To remove institute in first elliptical region The region stated outside instantaneous operating point allows area as work, is adjusted using the region outside first elliptical region as work Area.
19. device according to claim 18, it is characterised in that the operating point determining unit, also particularly useful for：

Obtain the inlet and outlet pressure and inlet flow rate data of presently described fluid machinery；

According to the inlet and outlet pressure of presently described fluid machinery and inlet flow rate data, in the performance chart of the fluid machinery Position where the middle instantaneous operating conditions for determining presently described fluid machinery, as real-time working point.
20. device according to claim 19, it is characterised in that the anti-surge valve control unit, including：

First judge module, for judging the real-time working point of the fluid machinery whether at the instantaneous operating point；

Second judge module, for the judged result according to first judge module, in response to the real-time of the fluid machinery Whether operating point is not located at the instantaneous operating point, judge the real-time working point of the fluid machinery and allow positioned at the work Area；

First execution module, for the judged result according to second judge module, in response to the real-time of the fluid machinery Operating point, which is located at the work, allows area, is opened using loop pid control mode control anti-surge valve is divided；

Second execution module, for the judged result according to second judge module, in response to the real-time of the fluid machinery Operating point is located at work adjustment area, and adoption rate control mode control anti-surge valve is opened.
21. device according to claim 20, it is characterised in that each working region also includes：Work wave zone.
22. device according to claim 21, it is characterised in that the working region determining unit, also particularly useful for：

Centered on the instantaneous operating point, respectively with the instantaneous operating point in the performance chart of the fluid machinery Second pre-set ratio of transverse and longitudinal coordinate is that long semi-minor axis constructs the second elliptical region, wherein second pre-set ratio is more than institute State the first pre-set ratio；Region using in second elliptical region in addition to first elliptical region adjusts as work Area, work wave zone is used as using the region outside second elliptical region.
23. device according to claim 22, it is characterised in that the anti-surge valve control unit, in addition to：

3rd judge module, for the judged result according to second judge module, in response to the real-time of the fluid machinery Operating point, which is not located at the work, allows area, judges whether the real-time working point of the fluid machinery adjusts positioned at the work Area；

Second execution module, specifically for the judged result according to the 3rd judge module, in response to the fluid machine The real-time working point of tool is located at work adjustment area, is opened using equal proportion control mode control anti-surge valve；

3rd execution module, for the judged result according to the 3rd judge module, in response to the real-time of the fluid machinery Operating point is located at the work wave zone, is opened using control with changed scale control mode control anti-surge valve.
24. according to the device described in claim 20 to 23 any one, it is characterised in that the anti-surge valve control unit, Also include：

4th judge module, for judging whether the real-time working point of the fluid machinery returns to the instantaneous operating point；

4th execution module, for the judged result according to the 4th judge module, in response to the real-time of the fluid machinery Operating point returns to the instantaneous operating point, controls the anti-surge valve to return to initial position using major loop pid control mode；

Second judge module, the judged result according to the 4th judge module is additionally operable to, in response to the fluid machinery Real-time working point be not returned to the instantaneous operating point, judge fluid machinery real-time working point whether be located at fluid machinery property Can in curve map anti-surge line left side, if the real-time working point of fluid machinery is not located at the left side of anti-surge line, described in execution Whether judge the real-time working point of the fluid machinery allows the operation in area positioned at the work.
25. device according to claim 24, it is characterised in that the anti-surge valve control unit, in addition to：

5th judge module, for the judged result according to the 4th judge module, in response to the real-time of the fluid machinery Whether operating point is not returned to the instantaneous operating point, judge the real-time working point of the fluid machinery positioned at the fluid machinery The left side of anti-surge line in performance chart；

Second judge module, specifically for the judged result according to the 5th judge module, in response to the fluid machine The real-time working point of tool is not located at the left side of anti-surge line, perform the real-time working point for judging the fluid machinery whether position Allow the operation in area in the work；

6th judge module, for the judged result according to the 5th judge module, in response to the real-time of the fluid machinery Operating point is located at the left side of anti-surge line, judges whether the real-time working point of the fluid machinery is located at the property of the fluid machinery The left side of surge line in energy curve map；

4th execution module, the judged result according to the 6th judge module is additionally operable to, in response to the fluid machinery Real-time working point be not located at the left side of surge line, control the anti-surge valve to open using major loop pid control mode；

5th execution module, for the judged result according to the 6th judge module, in response to the real-time of the fluid machinery Operating point is located at the left side of surge line, directly controls the anti-surge valve standard-sized sheet.
26. device according to claim 25, it is characterised in that each working region also includes：Dead band, when the reality When operating point when being located in the dead band, it is believed that the real-time working point is located at or returned to the instantaneous operating point.
A kind of 27. control system, it is characterised in that including：Fluid machinery and according to claim 14 to 26 any one Anti-surge control device.
28. system according to claim 27, it is characterised in that the fluid machinery is centrifugal compressor.