CN106269310B - Surge control system - Google Patents
Surge control system Download PDFInfo
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- CN106269310B CN106269310B CN201610860217.9A CN201610860217A CN106269310B CN 106269310 B CN106269310 B CN 106269310B CN 201610860217 A CN201610860217 A CN 201610860217A CN 106269310 B CN106269310 B CN 106269310B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B13/00—Control arrangements specially designed for centrifuges; Programme control of centrifuges
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Abstract
The present invention provides a kind of surge controlling methods, include the following steps：Obtain running state parameter of the compressor under current working；Judge whether the compressor occurs surge according to running state parameter of the compressor under current working；Running state parameter during surge occurs for recording compressed machine, obtains surging condition parameter；The running frequency of compressor is adjusted to target frequency, the compressor stops surge at the target frequency；Record running state parameter corresponding with the target frequency, obtains dbjective state parameter；According to surging condition parameter and/or the current surge curve of dbjective state parameters revision, target surge curve is obtained；The operating status of the compressor is controlled according to target surge curve.The present invention also provides a kind of surge control systems.The surge controlling method and system of the present invention, is improved the accuracy and reliability of compressor surge control, solves the problems such as can not being unloaded due to compressor caused by surge.
Description
Technical field
The present invention relates to Centrifuge Techniques field, more particularly to a kind of surge controlling method and system.
Background technology
Centrifuge is susceptible to the phenomenon that compressor surge in the process of running, and surge line can be according to condensing pressure, steaming
Hair pressure, entry guide vane aperture transformation and change.To avoid the generation of surge phenomenon, the frequency of compressor is limited by needing
System more than surge line, but due to sensor accuracy deviation the problems such as, cause compressor frequency control inaccurate, make compressor
Surge control is inaccurate, influences the normal operation of compressor.
Invention content
In view of the problem of above-mentioned compressor surge control is inaccurate, the purpose of the present invention is to provide a kind of surge controlling parties
Method and system can correct current surge curve according to the running state parameter of compressor, improve the standard of compressor surge control
True property and reliability.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of surge controlling method, includes the following steps：
Obtain running state parameter of the compressor under current working；
Judge whether the compressor occurs surge according to running state parameter of the compressor under current working；
Running state parameter when surge occurs for the compressor is recorded, obtains surging condition parameter；
The running frequency of the compressor is adjusted to target frequency, the compressor stops asthma at the target frequency
It shakes；
Record running state parameter corresponding with the target frequency, obtains dbjective state parameter；
According to the surging condition parameter and/or the current surge curve of dbjective state parameters revision, it is bent to obtain target surge
Line；
The operating status of the compressor is controlled according to the target surge curve.
The method further includes step in one of the embodiments,：
Whenever a surge occurs for the compressor, it is pre- that the running frequency of the compressor is turned up one or more first
If frequency, until the running frequency of the compressor reaches the target frequency.
In one of the embodiments, when judging that surge does not occur for the compressor, the method further includes following step
Suddenly：
Judge whether the running frequency of the compressor is corresponding less than or equal to pumping point in the current surge curve
Surge frequency；
Judge whether the compressor continues to unload；
When the running frequency of the compressor is less than or equal to the corresponding surge frequency of pumping point in the current surge curve
When rate and the compressor continues unloading, the running frequency of the compressor is turned down into the second predeterminated frequency, obtains intermediate frequency,
Until the compressor stops unloading or the intermediate frequency reaches the target frequency.
The method further includes following steps in one of the embodiments,：
It obtains and records running state parameter corresponding with the intermediate frequency, obtain intermediate state parameter；
Continue to judge whether the compressor occurs surge according to the intermediate state parameter；
When surge occurs for judgement, the step of obtaining the surging condition parameter is returned；
When surge does not occur for judgement, the running frequency of the compressor is turned down into second predeterminated frequency, continues to obtain
Obtain the intermediate frequency.
The method further includes following steps in one of the embodiments,：
Surge deviation is calculated according to the current surge curve and surging condition parameter；
Judge whether the surge deviation is greater than or equal to preset reference value；
When the surge deviation is greater than or equal to preset reference value, then according to the surge deviation and dbjective state
Current surge curve described in parameters revision obtains the target surge curve.
In addition, the present invention also provides a kind of surge control system, including：
Acquisition module, for obtaining running state parameter of the compressor under current working；
First judgment module, for judging that the compressor is according to running state parameter of the compressor under current working
No generation surge；
First memory module for recording running state parameter when surge occurs for the compressor, obtains surging condition
Parameter；
Frequency regulation block, for adjusting the running frequency of the compressor to target frequency, the compressor is in institute
State stopping surge at target frequency；
Second memory module for recording running state parameter corresponding with the target frequency, obtains dbjective state ginseng
Number；
Correcting module, for according to the surging condition parameter and/or the current surge curve of dbjective state parameters revision, obtaining
Obtain target surge curve；
Monitoring module, for controlling the operating status of the compressor according to the target surge curve.
The frequency regulation block includes the first adjusting unit in one of the embodiments, for whenever the compression
Surge occurs for machine, the running frequency of the compressor is turned up one or more first predeterminated frequencies, until the compression
The running frequency of machine reaches the target frequency.
The system also includes the second judgment module and third judgment module, the frequencies in one of the embodiments,
Adjustment module further includes the second adjusting unit；
Second judgment module is used to judge whether the current operation frequency of the compressor to be less than or equal to described work as
The corresponding surge frequency of pumping point in preceding surge curve；The third judgment module is used to judge whether the compressor continues to unload
It carries；
Described second, which adjusts unit, is used to be less than or equal to the current surge when the current operation frequency of the compressor
When the corresponding surge frequency of pumping point and the compressor continue unloading on curve, the running frequency of the compressor is turned down the
Two predeterminated frequencies obtain intermediate frequency, until the compressor stops unloading or the intermediate frequency reaches the target frequency.
The acquisition module is additionally operable to obtain and records fortune corresponding with the intermediate frequency in one of the embodiments,
Row state parameter obtains intermediate state parameter；
First judgment module is additionally operable to judge whether the compressor occurs surge according to the intermediate state parameter.
The system also includes computing module and the 4th judgment modules in one of the embodiments,；
The computing module is used to calculate surge deviation according to the current surge curve and surging condition parameter；
4th judgment module is used to judge whether the surge deviation is greater than or equal to preset reference value；
The correcting module is additionally operable to when the surge deviation is greater than or equal to preset reference value, then according to the asthma
Current surge curve described in deviation of shaking and dbjective state parameters revision obtains the target surge curve.
The beneficial effects of the invention are as follows：
The surge controlling method and system of the present invention, is repaiied according to the surging condition parameter of record and/or dbjective state parameter
Proper preceding surge curve, makes target surge curve consistent with the practical pumping point of compressor, target surge curve can be with compression
Machine matches, and the operating status of compressor is controlled according to target surge curve, so as to improve the standard of compressor surge control
True property and reliability, solve the problems such as can not being unloaded due to compressor caused by surge.
Description of the drawings
Fig. 1 is the control flow chart of one embodiment of surge controlling method of the present invention；
Fig. 2 is the control flow chart of another embodiment of surge controlling method of the present invention；
Fig. 3 is the structure diagram of one embodiment of surge control system of the present invention.
Specific embodiment
In order to make technical scheme of the present invention clearer, below in conjunction with attached drawing, surge controlling method to the present invention and
System is described in further detail.It should be appreciated that specific embodiment described herein is only explaining the present invention and not have to
It is of the invention in limiting.It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the application can
To be combined with each other.
As shown in Figure 1, one embodiment of the invention provides a kind of surge controlling method, include the following steps：
S100, running state parameter of the compressor in current working is obtained；Wherein, the running state parameter of compressor can be with
Running frequency, operating current, pressure of inspiration(Pi), pressure at expulsion, guide vane opening including compressor etc..In the present embodiment, compression
The operating current of machine can be obtained by detections such as current sensor or current transformers, and pressure of inspiration(Pi) can be by being arranged on pressure
The pressure detector of contracting machine air entry obtains, and pressure at expulsion can be obtained by being arranged on the pressure detector of exhaust outlet of compressor
.Specifically, control system can be according to sample requirement, and the operating status for obtaining compressor at each moment of current working is joined
Number, that is, it can be multiple to obtain running state parameter, to ensure the reliability of compressor surge control.
S200, judge whether compressor occurs surge according to running state parameter of the compressor under current working；This reality
It applies in example, control system can be according to the change rate of pressure of inspiration(Pi), the change rate of pressure at expulsion, relative speed variation, minimum discharge
And one or more in inlet flow rate change rate judge whether compressor occurs surge phenomenon.For example, when compressor is just
When being run under normal operating mode, pressure at expulsion change rate and inlet flow rate change rate very little, when compressor is proximal or into surge work
Condition is that pressure at expulsion change rate and inlet flow rate change rate significantly increase, therefore, when compressor exhaust change rate and
When inlet flow rate change rate increases, illustrate that surge occurs for compressor.Certainly, in other embodiments, audiometry can also be passed through
Pneumatic noise of compressor outlet pipeline etc. judges whether compressor occurs surge.
Running state parameter when S300, the generation surge of recording compressed machine, obtains surging condition parameter, to be compressed
The true surge curve of machine.In the present embodiment, control system can obtain surging condition parameter of the compressor in different moments, i.e.,
The quantity of the surging condition parameter of acquisition can be multiple, to be carried out point by point to current surge curve according to surging condition parameter
It compares and corrects.
S400, the running frequency of compressor is adjusted to target frequency, compressor stops surge at target frequency；That is mesh
Mark frequency is the minimum frequency that surge will not occur for compressor, i.e. target frequency is the practical pumping point of compressor.Therefore,
By adjusting the running frequency at each moment of compressor to corresponding target frequency, you can obtain target surge curve.
In actual application, control system can by PI (proportion integration, proportional integration),
The running frequency of compressor is adjusted in the mode of control, until the running frequency of compressor reaches target frequency, stops asthma
It shakes.Specifically, whenever a judgement compressor surge of generation, one or more first is turned up in the running frequency of compressor and is preset
Frequency repeats step S200 later, until compressor stops surge.Wherein, the first predeterminated frequency can be according to compressor
Running state parameter sets itself, can also be configured according to the maximum frequency values of compressor.For example, by the first default frequency
Rate is set as the 1%~5% of compressor maximum frequency values.
The dbjective state parameter of S500, record compressor corresponding with target frequency；I.e. control system obtains and records pressure
Dbjective state parameter of the contracting machine at target frequency, to be modified to current surge curve.
S600, according to the surging condition parameter of compressor and/or the current surge curve of dbjective state parameters revision, obtain mesh
Mark surge curve.In the present embodiment, surge curve can be obtained by equation below：
F=AX2+BX+C+(1-Y)×I；
Wherein, F represents surge curve, and X represents the ratio of pressure at expulsion and pressure of inspiration(Pi), and Y represents guide vane opening, and I is represented
The operating current of compressor, A, B, C are constant.Wherein, control system is fitted and compressor in advance by way of emulation
The surge curve matched, i.e. control system can pre-set parameter A, B and the initial value of C.
Therefore, can by the surging condition parameter of compressor and/or the value of dbjective state parameters revision A, B or C,
So as to fulfill the purpose for correcting incipient surge curve, obtain target surge curve so that target surge curve and compressor it is true
Real pumping point is more close to so as to improve the accuracy and reliability of compressor surge control.For example, target can be passed through
State parameter obtains the numerical value of X, Y and I, and corrects A, B and C according to the deviation of surging condition parameter and current surge curve
Numerical value so as to obtain target surge curve, makes target surge curve match with compressor, for details, reference can be made to retouching hereinafter
It states.
S700, the operating status that compressor is controlled according to target surge curve, you can be controlled by target surge curve
The running frequency of compressor so that the running frequency of compressor is in the upper area of target surge curve always, avoids compressing
Surge occurs for machine, can improve the reliability of compressor surge control.
It should be understood that pumping point is the minimum frequency that surge will not occur under current working for compressor, surge is bent
Line is the set of all pumping points.Surge phenomenon will not just occur for the upper area that compressor only operates in surge line, otherwise,
Surge phenomenon probably occurs for compressor.The pumping point that i.e. running frequency of compressor should be more than in surge curve is corresponding
Surge frequency, to avoid the generation of surge.
In one embodiment, as shown in Fig. 2, when judging that surge does not occur for compressor, the above method further includes as follows
Step：
S210, judge whether the running frequency of compressor is less than or equal to the corresponding surge of pumping point in current surge curve
Frequency；When the running frequency of compressor surge frequency corresponding less than or equal to pumping point in current surge curve, illustrate to work as
Preceding surge curve cannot match the operation demand of compressor, and compressor still has the risk of surge, by further judging
Compressor operating frequency can further reduce erroneous judgement, improve the accuracy and reliability of compressor surge control.Work as compressor
Running frequency when being more than the corresponding surge frequency of pumping point on incipient surge curve, illustrate compressor operating in nominal situation,
At this point, obtain the running state parameter of recording compressed machine.
In the present embodiment, since surge curve can change according to the variation of compressor operating operating mode, work as compression
When surge phenomenon does not occur for machine, it may be possible to which current surge curve and the operating status of compressor mismatch, and therefore, pass through continuation
Judge the running frequency frequency corresponding with pumping point in current surge curve of compressor, surge control can be further improved
Accuracy and reliability.
S220, judge whether compressor continues to unload, i.e., control system can be further according to the operation demand of compressor
Judge whether the running frequency of compressor continues to reduce.
When the running frequency of the compressor is less than or equal to the corresponding surge frequency of pumping point and compression in surge curve
When machine continues unloading, then following steps are performed：
S230, the running frequency of compressor is turned down to the second predeterminated frequency, obtains intermediate frequency, until compressor stopping is unloaded
It carries or intermediate frequency reaches target frequency.In the present embodiment, obtaining for intermediate frequency can also be by the way of PI controls.
Specifically, when the running frequency that surge and the compressor do not occur for judgement compressor is less than or equal to surge curve
The corresponding surge frequency of upper pumping point, and when compressor still needs to continue unloading, the running frequency of compressor is turned down one
Or multiple second predeterminated frequencies, intermediate frequency is obtained, repeats step S230~step S250 later, until above-mentioned centre
Frequency reaches target frequency or compressor stops unloading.Wherein, the second predeterminated frequency can join according to the operating status of compressor
Number sets itself, can also be configured according to the maximum frequency values of compressor.For example, the second predeterminated frequency is set as compressing
The 1%~5% of machine maximum frequency values.Otherwise, then return to step S100, i.e., when the current operation frequency of compressor is more than current asthma
When shaking that the corresponding surge frequency of pumping point and/or compressor do not continue unloading on curve, return to step S100 continues to obtain pressure
The running state parameter of contracting machine.
Further, when the running frequency that surge and compressor do not occur for judgement compressor is less than or equal in surge curve
The corresponding surge frequency of pumping point, and when compressor still needs to continue unloading, then perform following steps：
S240, acquisition and the running state parameter for recording compressor corresponding with intermediate objective frequency obtain intermediate state
Parameter；
S250, judge whether compressor occurs surge according to the intermediate state parameter of compressor, when judging compressor
During surge, step S300~step S700 is repeated, that is, performs following steps：
Running state parameter when S300, the generation surge of recording compressed machine, obtains surging condition parameter, to be compressed
The true surge curve of machine.In the present embodiment, control system can obtain surging condition parameter of the compressor in different moments, i.e.,
The quantity of the surging condition parameter of acquisition can be multiple, to be carried out point by point to current surge curve according to surging condition parameter
It compares and corrects.
S400, the running frequency of compressor is adjusted to target frequency, compressor stops surge at target frequency；That is mesh
Mark frequency is the minimum frequency that surge will not occur for compressor, i.e. target frequency is the practical pumping point of compressor.Therefore,
By adjusting the running frequency at each moment of compressor to corresponding target frequency, you can obtain target surge curve.
The dbjective state parameter of S500, record compressor corresponding with target frequency；I.e. control system obtains and records pressure
Dbjective state parameter of the contracting machine at target frequency, to be modified to current surge curve.
S600, according to the surging condition parameter of compressor and/or the current surge curve of dbjective state parameters revision, obtain mesh
Mark surge curve；
S700, the operating status that compressor is controlled according to target surge curve.
Otherwise, i.e., when surge not occurring according to intermediate state parameter decision compressor, then return to step 230, continue to turn down
The running frequency of compressor repeats step S230~step S250.
As a further improvement, the above method further includes following steps：
Surge deviation is calculated according to current surge curve and the surging condition parameter of record；Wherein, control system can be with
The state parameter of the surging condition parameter of the different moments of record corresponding current surge curve respectively is compared, is obtained
Obtain multiple surge deviations.
Judge whether surge deviation is greater than or equal to preset reference value；Wherein, preset reference value can be according to compressor
Operating parameter etc. set, to ensure that compressor being capable of normal operation.
When the surge deviation is greater than or equal to preset reference value, then according to surge deviation and dbjective state parameter
Current surge curve is corrected, obtains target surge curve.Otherwise, then it is assumed that current surge curve can be matched with compressor, temporarily
It does not need to be modified, to reduce the operand of control system, improves the response efficiency of control system.
For example, surge deviation is greater than or equal to preset reference value, and current surge curve is judged according to surge deviation
On the whole partially, then it can pass through the parameter C in surge curve formula so that entire surge curve integrally moves down, and combining target
State parameter obtains target surge curve so that the practical pumping point of target surge curve and compressor mutually close to.
Further, control system judges whether each surge deviation is greater than or equal to preset reference value, and right respectively
Above-mentioned comparison result is counted.For example, the surge deviation that its value is greater than or equal to preset reference value is denoted as the first surge
Otherwise deviation is denoted as the second surge deviation.Control system simultaneously judge the first surge deviation quantity whether be more than or
Equal to predetermined threshold value, wherein, predetermined threshold value can be the 50%~80% of surge deviation quantity summation.
When the first surge deviation is greater than or equal to predetermined threshold value, then illustrate current surge curve and the surge shape of record
The whole deviation of state parameter is larger, at this point, according to surge deviation and the current surge curve of dbjective state parameters revision, obtains mesh
Mark surge curve so that the practical pumping point of target surge curve and compressor is mutually close to improve compressor surge control
Reliability and accuracy.
One of ordinary skill in the art will appreciate that realizing all or part of flow in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a computer read/write memory medium
In, the program is when being executed, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
In addition, as shown in figure 3, one embodiment of the invention additionally provides a kind of surge control system, for including centrifugation pressure
The surges such as contracting machine or variable frequency centrifuge control, including acquisition module 100, the first judgment module 200, the first memory module 300, frequency
Rate adjustment module 400, the second memory module 500, correcting module 600 and monitoring module 700.
Acquisition module 100 is used to obtain running state parameter of the compressor under current working；Wherein, the operation of compressor
State parameter can include the running frequency of compressor, operating current, pressure of inspiration(Pi), pressure at expulsion, guide vane opening etc..It obtains
Module 100 can include current sensor, speed probe, pressure sensor etc..
First judgment module 200 is used to whether judge compressor according to running state parameter of the compressor under current working
Surge occurs；In the present embodiment, the first judgment module 200 can according to the change rate of pressure of inspiration(Pi), pressure at expulsion change rate,
One or more in relative speed variation, minimum discharge and inlet flow rate change rate judge whether compressor occurs surge and show
As.
First memory module 300 is used to record running state parameter when surge occurs for the compressor, obtains surge shape
State parameter, in the present embodiment, acquisition module 100 can obtain surging condition parameter of the compressor in different moments, that is, obtain
The quantity of surging condition parameter can be multiple, be repaiied to carry out point-by-point compare to current surge curve according to surging condition parameter
Just.First memory module 300 can be read-only memory (ROM), random access memory (RAM) or dynamic memory
(DRAM)。
Frequency regulation block 400 is used to adjust the running frequency of compressor to target frequency compressor at target frequency
Stop surge；I.e. target frequency is the minimum frequency that surge will not occur for compressor, and target frequency is the reality of compressor
Pumping point.
Second memory module 500 is used to record running state parameter corresponding with target frequency, obtains dbjective state parameter,
That is the second memory module 500 obtains and dbjective state parameter of the recording compressed machine at target frequency, so as to current surge song
Line is modified.Second memory module 500 can be read-only memory (ROM), random access memory (RAM) or dynamic memory
Device (DRAM).
Correcting module 600 is used to, according to surging condition parameter and/or the current surge curve of dbjective state parameters revision, obtain
Target surge curve；In the present embodiment, surge curve can be obtained by equation below：
F=AX2+BX+C+(1-Y)×I；
Wherein, F represents surge curve, and X represents the ratio of pressure at expulsion and pressure of inspiration(Pi), and Y represents guide vane opening, and I is represented
The operating current of compressor, A, B, C are constant.
Therefore, can by the surging condition parameter of compressor and/or the value of dbjective state parameters revision A, B or C,
So as to fulfill the purpose for correcting incipient surge curve, obtain target surge curve so that target surge curve and compressor it is true
Real pumping point is more close to so as to improve the accuracy and reliability of compressor surge control.
Monitoring module 700 is used to control the operating status of compressor according to target surge curve, i.e. monitoring module can lead to
Cross the running frequency of target surge curve control compressor so that the running frequency of compressor is in target surge curve always
Upper area avoids compressor that surge occurs, and can improve the reliability of compressor surge control.
Wherein, acquisition module 100 in the control system of the present embodiment, the first judgment module 200, the first memory module 300,
Frequency regulation block 400, the second memory module 500, correcting module 600 and monitoring module 700 control respectively with above-mentioned surge
Step S100~S700 in method is correspondingly arranged, and can be found in specific work process described above.
In one embodiment, frequency regulation block 400 includes the first adjusting unit, and first, which adjusts unit, is used for whenever pressure
Surge occurs for contracting machine, the running frequency of compressor is turned up one or more first predeterminated frequencies, until the fortune of compressor
Line frequency reaches target frequency.I.e. first adjusts unit can be by PI (proportion integration, ratio product
Point), the mode of control the running frequency of compressor is adjusted, until the running frequency of compressor reaches target frequency, stop
Zhichuan is shaken.Wherein, the first predeterminated frequency can be according to the running state parameter sets itself of compressor, can also be according to compressor
Maximum frequency values be configured.For example, the first predeterminated frequency is set as the 1%~5% of compressor maximum frequency values.
In one embodiment, above system further includes the second judgment module and third judgment module, frequency regulation block
Further include the second adjusting unit；Wherein, the second judgment module is worked as judging whether the running frequency of compressor is less than or equal to
The corresponding surge frequency of pumping point in preceding surge curve is breathed heavily when the running frequency of compressor is less than or equal in current surge curve
During a little corresponding surge frequency of shaking, illustrate that current surge curve cannot match the operation demand of compressor, compressor is still deposited
In the risk of surge.When the running frequency of compressor surge frequency corresponding more than pumping point on incipient surge curve, explanation
Compressor operating is in nominal situation, at this point, obtaining the running state parameter of recording compressed machine.Third judgment module is pressed for judgement
Whether contracting machine, which continues, unloads, i.e., third judgment module can further judge the operation of compressor according to the operation demand of compressor
Whether frequency, which continues, reduces.
Second, which adjusts unit, is used to be less than or equal to pumping point in current surge curve when the current operation frequency of compressor
When corresponding surge frequency and compressor continue unloading, the running frequency of compressor is turned down into the second predeterminated frequency, is obtained intermediate
Frequency, until compressor stops unloading or the intermediate frequency reaches the target frequency.In the present embodiment, intermediate frequency obtains
Obtaining can also be by the way of PI control.Specifically, when surge does not occur for the first judgment module judgement compressor and second judges
The running frequency of module judgement compressor is less than or equal to the corresponding surge frequency of pumping point in surge curve, and third judgement mould
When block judgement compressor still needs to continue unloading, the running frequency of compressor is turned down into one or more second predeterminated frequencies,
Intermediate frequency is obtained, until above-mentioned intermediate frequency reaches target frequency or compressor stops unloading.Wherein, the second predeterminated frequency can
With the running state parameter sets itself according to compressor, can also be configured according to the maximum frequency values of compressor.For example,
Second predeterminated frequency is set as the 1%~5% of compressor maximum frequency values.
Acquisition module 100 is additionally operable to obtain and records running state parameter corresponding with intermediate frequency, obtains intermediate state
Parameter；First judgment module 200 is additionally operable to judge whether compressor occurs surge according to intermediate state parameter.In this way, by into
One step judges that compressor operating frequency and unloading demand obtain intermediate state parameter, and further judge according to intermediate state parameter
Whether compressor occurs surge, can further reduce erroneous judgement, improves the accuracy and reliability of compressor surge control.
As a further improvement, above system further includes computing module and the 4th judgment module；Wherein, computing module is used
According to current surge curve and surging condition parameter calculating surge deviation；Wherein, computing module can include multiple calculating
Unit, each computing unit are used to distinguish according to the surging condition parameter at current time the shape of corresponding current surge curve
State parameter is compared, and obtains multiple surge deviations.
4th judgment module is used to judge whether surge deviation is greater than or equal to preset reference value；Wherein, preset reference
Value can be set according to operating parameter of compressor etc., to ensure that compressor being capable of normal operation.Further, the 4th sentences
Disconnected module can also include multiple judging units, and each judging unit is used to judge whether a surge deviation is greater than or equal to
Preset reference value.
Correcting module 600 is additionally operable to when surge deviation is greater than or equal to preset reference value, then according to surge deviation
And the current surge curve of dbjective state parameters revision, obtain target surge curve.Otherwise, then it is assumed that current surge curve can be with
Compressor matches, and wouldn't need to be modified, to reduce the operand of control system, improve the response efficiency of control system.
For example, when the 4th judgment module judges that surge deviation is greater than or equal to preset reference value, and according to surge deviation
Value judges that current surge curve is inclined on the whole, then correcting module can pass through the parameter C in surge curve formula so that entire asthma
The curve that shakes integrally moves down, and combining target state parameter obtains target surge curve so that target surge curve and compressor
Practical pumping point mutually close to.
Further, control system further includes the 5th judgment module and sort module, the sort module for pair
The comparison result of second judgment module is counted.For example, sort module is used to its value being greater than or equal to preset reference value
Surge deviation is denoted as the first surge deviation, is otherwise denoted as the second surge deviation.5th judgment module is used to judge first
Whether the quantity of surge deviation is greater than or equal to predetermined threshold value, wherein, predetermined threshold value can be surge deviation quantity summation
50%~80%.When the first surge deviation is greater than or equal to predetermined threshold value, then illustrate current surge curve and record
The whole deviation of surging condition parameter is larger, at this point, according to surge deviation and the current surge curve of dbjective state parameters revision,
Obtain target surge curve so that the practical pumping point of target surge curve and compressor is mutually close to improve compressor surge
The reliability and accuracy of control.
It should be understood that the operation principle of the surge control system of the present embodiment with it is above-mentioned in surge controlling method
It is basically identical to perform step, for details, reference can be made to described above.
The surge controlling method and system of the present invention, is repaiied according to the surging condition parameter of record and/or dbjective state parameter
Proper preceding surge curve, makes target surge curve consistent with the practical pumping point of compressor, target surge curve can be with compression
Machine matches, and the operating status of compressor is controlled according to target surge curve, so as to improve the standard of compressor surge control
True property and reliability, solve the problems such as can not being unloaded due to compressor caused by surge.
Embodiment described above only expresses the several embodiments of the present invention, and description is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (5)
1. a kind of surge control system, which is characterized in that including：
Acquisition module, for obtaining running state parameter of the compressor under current working；
First judgment module, for judging whether the compressor is sent out according to running state parameter of the compressor under current working
Raw surge；
First memory module for recording running state parameter when surge occurs for the compressor, obtains surging condition parameter；
Frequency regulation block, for adjusting the running frequency of the compressor to target frequency, the compressor is in the mesh
It marks and stops surge at frequency；
Second memory module for recording running state parameter corresponding with the target frequency, obtains dbjective state parameter；
Correcting module, for according to the surging condition parameter and/or the current surge curve of dbjective state parameters revision, obtaining mesh
Mark surge curve；
Monitoring module, for controlling the operating status of the compressor according to the target surge curve.
2. surge control system according to claim 1, which is characterized in that the frequency regulation block includes first and adjusts
For a surge to occur whenever the compressor, one or more first is turned up in the running frequency of the compressor by unit
Predeterminated frequency, until the running frequency of the compressor reaches the target frequency.
3. surge control system according to claim 1, which is characterized in that the system also includes the second judgment module and
Third judgment module, the frequency regulation block further include the second adjusting unit；
Second judgment module is used to judge whether the current operation frequency of the compressor to be less than or equal to the current asthma
It shakes the corresponding surge frequency of pumping point on curve；The third judgment module is used to judge whether the compressor continues to unload；
Described second, which adjusts unit, is used to be less than or equal to the current surge curve when the current operation frequency of the compressor
When the upper corresponding surge frequency of pumping point and the compressor continue unloading, it is pre- that the running frequency of the compressor is turned down second
If frequency, intermediate frequency is obtained, until the compressor stops unloading or the intermediate frequency reaches the target frequency.
4. surge control system according to claim 3, which is characterized in that the acquisition module is additionally operable to obtain and record
Running state parameter corresponding with the intermediate frequency obtains intermediate state parameter；
First judgment module is additionally operable to judge whether the compressor occurs surge according to the intermediate state parameter.
5. according to claim 1-4 any one of them surge control systems, which is characterized in that the system also includes calculate mould
Block and the 4th judgment module；
The computing module is used to calculate surge deviation according to the current surge curve and surging condition parameter；
4th judgment module is used to judge whether the surge deviation is greater than or equal to preset reference value；
The correcting module is additionally operable to when the surge deviation is greater than or equal to preset reference value, then inclined according to the surge
Current surge curve described in difference and dbjective state parameters revision obtains the target surge curve.
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| CN109458324A (en) * | 2018-10-31 | 2019-03-12 | 重庆美的通用制冷设备有限公司 | Compressor surge recognition methods, apparatus and system |
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| CN109253521B (en) * | 2018-09-30 | 2019-12-24 | 珠海格力电器股份有限公司 | Noise control method, device and system, air conditioner and computer readable storage medium |
| CN109488632B (en) * | 2018-11-07 | 2019-10-22 | 珠海格力电器股份有限公司 | Apparatus control method, device and computer readable storage medium |
| CN112443508B (en) * | 2019-09-02 | 2022-04-08 | 中国航发商用航空发动机有限责任公司 | Surge detection method and system for turbofan engine |
| CN111307206B (en) * | 2020-02-20 | 2021-08-31 | 北京天泽智云科技有限公司 | Multi-source information fusion-based compressor surge automatic identification method |
| CN111561769B (en) * | 2020-05-21 | 2022-07-08 | 广东美的暖通设备有限公司 | Fresh air system, control method thereof and computer-readable storage medium |
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| TWI773107B (en) * | 2021-01-29 | 2022-08-01 | 復盛股份有限公司 | Surge detection method and compression device |
| CN113108509A (en) * | 2021-04-21 | 2021-07-13 | 荏原冷热***（中国）有限公司 | Method for obtaining surge curve of cooling and heating unit and related device |
| CN114198921B (en) * | 2021-11-22 | 2023-04-28 | 青岛海尔空调电子有限公司 | Method and device for controlling refrigerant circulation system and refrigerant circulation system |
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| CN102562639B (en) * | 2012-01-13 | 2014-11-12 | 杭州哲达科技股份有限公司 | Anti-surge control method of blast furnace blower |
| CN102619774B (en) * | 2012-04-19 | 2015-05-20 | 江苏乘帆压缩机有限公司 | Surge control method of centrifugal compression equipment |
| JP2014043795A (en) * | 2012-08-24 | 2014-03-13 | Hitachi Ltd | Surge generation preventing device and compressor incorporating the same |
| US9528913B2 (en) * | 2014-07-24 | 2016-12-27 | General Electric Company | Method and systems for detection of compressor surge |
| US9506474B2 (en) * | 2014-12-08 | 2016-11-29 | Ford Global Technologies, Llc | Methods and systems for real-time compressor surge line adaptation |
| CN104533820B (en) * | 2014-12-26 | 2017-01-11 | 沈阳鼓风机集团自动控制***工程有限公司 | Anti surge control method and device |
| CN104965496B (en) * | 2015-06-25 | 2018-09-11 | 沈阳鼓风机集团自动控制***工程有限公司 | Anti-surge control method based on antisurge control system |
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