CN102588315A - Automatic surge testing method for turbine compressor - Google Patents
Automatic surge testing method for turbine compressor Download PDFInfo
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- CN102588315A CN102588315A CN2012100904914A CN201210090491A CN102588315A CN 102588315 A CN102588315 A CN 102588315A CN 2012100904914 A CN2012100904914 A CN 2012100904914A CN 201210090491 A CN201210090491 A CN 201210090491A CN 102588315 A CN102588315 A CN 102588315A
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Abstract
The invention discloses an automatic surge testing method for a turbine compressor. The automatic surge testing method includes the steps: determining anticipated surge testing points; inputting the testing points; setting the turbine compressor; acquiring testing parameters; judging a surge condition; smoothly approximating and quickly breaking away from the surge condition; storing surge parameters; judging whether to continue surge testing or not, repeating the steps until all the anticipated surge testing points are tested if continuing surge testing, and ending the testing if not; generating a surge curve; and generating an anti-surge curve. The frequency of testing acquisition of condition parameters of the turbine compressor by a parameter acquirer is 300-500 milliseconds per time. The margin coefficient of the anti-surge curve ranges from 5% to 10%. The automatic surge testing method effectively avoids the problem that manual test of the surge curve of the turbine compressor easily causes big errors, reduces human input of surge testing of the turbine compressor, avoids violent change of the operation condition of the turbine compressor caused by emergency operation measures, and guarantees instant surge testing of the turbine compressor.
Description
Technical field
The invention belongs to the automation field of compressor, be specifically related to a kind of turbocompressor surge automatic test method.
Background technique
The design of turbocompressor, at first be according to related tooling the parameter request of compressor operating operating mode is carried out Pneumatic Calculation and structural design.In the running operating point that the determined turbocompressor performance curve of Pneumatic Calculation (surge curve) requires tooling is included in, to guarantee the coupling operation of turbocompressor and tooling.Turbocompressor is in manufacture process, because the deviations that Act for God such as machinings; At the scene in the installation process, because the deviation of front and back process pipe, equipment setting all can make turbocompressor performance curve (surge curve) and the determined performance curve of Pneumatic Calculation (surge curve) depart to some extent.Be the surge curve that guarantees in unit control system, to be provided with and the accuracy of anti-surge curve; Every turbocompressor all needs the surge test professional workforce of compressor manufacturer to go to the on-the-spot artificial surge test of implementing of user before putting into operation; With the actual pumping point of turbocompressor relatively with design the degree that pumping point matches, and turbocompressor surge curve and anti-surge curve are set in view of the above.During turbocompressor generation surge, its a plurality of monitoring parameters all can change, and can be used as the foundation of judging that surge takes place.
We know that turbocompressor anti-surge curve is on the basis of surge curve, to leave certain nargin to obtain.The anti-surge curve is the important barrier together that guarantees the turbocompressor safe operation, also is the separatrix of normal operating conditions of turbocompressor and abnormal running operating mode simultaneously.This shows whether turbocompressor anti-surge line is provided with reasonable, be decided by that at first whether accurately true the turbocompressor surge curve measure, secondly is whether the nargin coefficient got when the anti-surge curve is set is rationally appropriate.
Turbocompressor as if a function admirable, according with process requirements; Because inaccurate, the nargin coefficient value of surge test is improper; Will cause the inaccurate of anti-surge curve setting; Thereby the operation to turbocompressor brings following negative effect: 1) if the setting of turbocompressor anti-surge curve is too conservative, can cause dwindling of the normal operation area of turbocompressor.Sometimes in order to satisfy the requirement of tooling operation, the turbocompressor operation of just need leaking informaton causes the waste of the energy and to the noise pollution of environment; 2) if turbocompressor anti-surge curve is provided with very near surge curve, cause turbocompressor surge operation easily, the safe operation of turbocompressor is constituted harm, and can cause the process units abnormal running, the ordinary production of enterprise is brought influence.To sum up, can the setting of the test of turbocompressor surge curve and anti-surge curve normal, efficient, safe operation be most important to turbocompressor.
For a long time, the test of turbine compression surge curve is accomplished by manual work.The surge tester relies on self the observation of the understanding of surge, a certain Operational Limits to be judged whether turbocompressor surge takes place, and obtains the surge parameter of turbocompressor expection surge test point.
At first, because the monotony that the tester observes, the running state of grasp turbocompressor comprehensively; In addition; The tester is different with blunt property to the too drastic property of surging phenomenon reflection; Observed and the pumping point parameter of reading and actual parameter be error to some extent, because the surge tester to the understanding difference of anti-surge curve, finally can have influence on the accuracy and the uniformity of the surge curve that tests out.In a word; Manual testing's turbocompressor surge curve; The index that is difficult to form a unified standard and surge is judged; The surge curve of gained might have bigger deviation with the actual surge curve of turbocompressor, and it is inaccurate to cause the anti-surge curve to be provided with like this, and the operation of turbocompressor is caused bad influence.The second, during manual testing's turbocompressor surge curve, the tester can take the instant operation measure when judging turbocompressor generation surge, makes turbocompressor get into the safe operation state.Such operation makes the operating conditions of turbocompressor that violent variation take place, and strictly speaking, such operation can bring corresponding harm to turbocompressor and relevant apparatus, should give and avoids.The 3rd, manual testing's turbocompressor surge curve needs compressor to make producer and appoints the professional workforce to come the practical operation test, and not only cost of labor is high, also receives the restriction of space-time simultaneously, lacks promptness.
Summary of the invention
To defective that exists in the above-mentioned existing technology or deficiency; The objective of the invention is to; A kind of automatic test approach of turbocompressor surge is provided, and this method is utilized the automatic surge test of turbocompressor, and surge line and anti-surge line are set automatically; Replaced by manual operation; Test the surge of turbocompressor by rule of thumb and surge curve is set and the primitive method of anti-surge curve, effectively avoided manual testing's turbocompressor surge curve to be prone to produce, reduced the human input of turbocompressor surge test than mistake; And the turbocompressor operating conditions generation acute variation of having avoided the instant operation measure to cause, assurance turbocompressor surge test can be carried out immediately.
In order to achieve the above object, the present invention adopts following technical solution:
A kind of automatic test approach of turbocompressor surge is characterized in that, specifically comprises the steps:
1) the surge test point of definite expection: 3～6 surge test points of picked at random the Pneumatic Calculation point on the turbocompressor surge curve as expection;
2) input of test point: the static blade angle value and/or the generating unit speed value of the turbocompressor operating mode joint mechanism that the surge test point of an expection of input is represented, and exhaust pressure value and/or flow;
3) set of turbocompressor: unit control system control turbocompressor regulating working conditions mechanism and/or rotating speed adjusting mechanism are set to turbocompressor the represented static blade angle value and/or the generating unit speed value of surge test point of the expection of input;
4) test parameter collection: place the surge test point of expection when turbocompressor after; The duty parameter value that unit control system control test parameter collector is gathered turbocompressor with certain frequency, said duty parameter value comprise aperture (ZT), rotating speed (SE), inlet temperature (TE), flow or throat's differential pressure (PdT) and inlet pressure, the exhaust pressure (PT, PT1, PT2) of turbocompressor;
5) surging condition is judged: the two adjacent groups duty parameter value that relatively collects, under all identical situation of other test condition, reduce simultaneously as if exhaust pressure and flow in two groups of duty parameter values, and judge that then turbocompressor gets into surging condition;
6) steadily approaching and disengaging fast of surging condition: when turbocompressor did not get into surging condition, the aperture of being controlled the anti-surge regulating valve by anti-surge controlling mechanism controller turned down; If judge that turbocompressor is in surging condition, think that then turbocompressor has arrived actual pumping point, at this moment execution in step 7), simultaneously, increase by anti-surge controlling mechanism controller control anti-surge controlling opening of valve;
The storage of 7) surge parameter: store in the pumping point parameter storage last group exhaust pressure, flow in two groups of duty parameter values into the EOT of current expection surge test point, execution in step 8 for the test value of expection);
8) judge whether the surge test continues: whether unit control system reminds surge test operator decision surge test to proceed, if then execution in step 2) to step 8), finish until all expection surge test point tests; Otherwise finish test, execution in step 9);
9) generate surge curve: behind the EOT, confirm that unit control system reads the surging condition parameter that the test of pumping point parameter storage storage obtains, generate the actual surge curve of turbocompressor through the curve match through the surge test operator;
10) generate the anti-surge curve: surge test operator input anti-surge curve nargin coefficient, unit control system obtains surge curve the anti-surge curve of turbocompressor by this nargin coefficient translation downwards.
Further, operate respectively as follows for dissimilar turbocompressors in the said step 3): 1. for deciding the adjustable AV of rotating speed stator blade series turbocompressor, the static blade angle that places the surge test point of expection to represent turbocompressor; 2. for the adjustable AV of variable speed stator blade series turbocompressor, the static blade angle that places the surge test point to represent turbocompressor, the generating unit speed value that places the surge test point of expection to represent turbocompressor; 3. for the variable speed turbocompressor, the generating unit speed value that places the surge test point of expection to represent turbocompressor.
Further, the frequency that test parameter collector 7 is gathered the duty parameter of turbocompressors in the said step 4) be 300～500 milliseconds/inferior.
Further, the nargin coefficient in the said step 10) gets 5%～10%.
The present invention is directed to the existing deficiency of manual testing's turbocompressor surge curve and be provided with, compare with existing surge test method, beneficial effect of the present invention is following:
1) this method replaces manual operation by the unified control of control system, has avoided manual testing's method because the sum of errors monotony that personal factor produces is judged comprehensively, accurately unified the situation that surge takes place.
2) because the test process of this method is to compare with the operating mode of measuring in real time according to pre-set preset point to adjust test at any time; Therefore; Obtain the true surge curve of turbocompressor to greatest extent; Thereby make being provided with of anti-surge curve accurate, can guarantee the operation that the turbocompressor long-term safety is stable.
3) big or small according to the switching and the aperture of operating mode control anti-surge valve at any time through control system; The surge test of turbine compression can steadily be carried out; The harm that the emergency measure of having avoided taking in order to get into steady operating mode among the manual testing are brought turbocompressor can be carried out turbocompressor surge test immediately.
4) the present invention can freely control whether continue test according to the situation of test by the operator on the basis of test automatically, and its surge test has repeatability, and therefore, this method had both been practiced thrift human cost, again can real-time, freedom control test process.
Description of drawings
Fig. 1 is the surge curve of the A series axial flow compressor that provides of certain turbocompressor manufacturer.
Fig. 2 is the surge curve of the AV series axial flow compressor that provides of certain turbocompressor manufacturer.
Fig. 3 is the surge curve of the centrifugal compressor that provides of certain turbocompressor manufacturer.
Fig. 4 is applied to the workflow diagram of Axial Flow Compressor for the present invention.
Fig. 5 is applied to the workflow diagram of centrifugal compressor for the present invention.
Fig. 6 to Figure 11 is the process monitoring figure of a concrete application example.
Fig. 6 is the surge test point that step 1) is chosen the expection that obtains.
Fig. 7 is the actual measurement surging condition figure of the surge test point (330,25) of expection.
Fig. 8 is the actual measurement surging condition figure of the surge test point (395,30) of expection.
Fig. 9 is the actual measurement surging condition figure of the surge test point (480,38) of expection.
Figure 10 is the actual measurement surging condition figure of the surge test point (575,49) of expection.
Figure 11 is the actual surge curve and the anti-surge curve of the resulting turbocompressor of test.Wherein, the curve that is positioned at the top is a surge curve, and the curve that is positioned at the below is the anti-surge curve.
Below in conjunction with accompanying drawing and embodiment the present invention is done further and to explain.
Embodiment
The flow process of turbocompressor surge automatic test approach of the present invention such as Fig. 4, shown in Figure 5.The applied unit of this method comprises unit control system, turbocompressor 1, turbocompressor regulating working conditions mechanism 2, the pull-over gear 3 of deciding rotating speed or variable speed, anti-surge regulating valve 4, rotating speed adjusting mechanism 8; And be used to measure inlet temperature temperature transducer (TE), measure generating unit speed speed probe (SE), measure turbocompressor regulating working conditions mechanism aperture position transmitter (ZT), measure the turbocompressor inlet flow rate transmitter (PdT), measure turbocompressor inlet pressure, exhaust pressure transmitter (wherein; Pressure transmitter PT is set on the outlet conduit of Axial Flow Compressor measures exhaust pressure; Pressure transmitter PT1 is set on the inlet pipeline of centrifugal compressor measures inlet pressure; Pressure transmitter PT2 is set on the outlet conduit measures exhaust pressure), above-mentioned hardware system is in order to accomplish detection, control, the execution function of the inventive method.
Functional block shown in flow chart 4, Fig. 5 such as anti-surge controlling mechanism controller 6, test parameter collector 7, pumping point parameter storage 12, surging condition are judged, are generated surge curve, generate the anti-surge curve; Constituted the method for control that the present invention uses, detection, generation; Build among the unit control system; Wherein, anti-surge controlling mechanism controller 6 is used to control the aperture of anti-surge regulating valve 4.
The detected parameter of said temperature sensor, speed probe, position transmitter, differential pressure transmitter and pressure transmitter is sent to unit control system; Unit control system is according to Fig. 4, function shown in Figure 5; Turbocompressor regulating working conditions mechanism 2, anti-surge regulating valve 4, rotating speed adjusting mechanism 8 are sent the regulating and controlling instruction, finally accomplish the automatic test of turbocompressor surge.
Method of the present invention specifically comprises the steps:
1) the surge test point of definite expection: the parameters that can clearly mark Pneumatic Calculation point and calculation level on the surge curve that turbocompressor manufacturer is provided.As shown in Figure 1, on the surge curve of certain A series axial flow compressor, marked 6 Pneumatic Calculation points, each point is corresponding with the curve number of figure top.Number can obtain the parameters such as aperture preset value (stator blade aperture), generating unit speed of Pneumatic Calculation point turbocompressor operating mode joint mechanism by response curve, can obtain the parameters such as flow (throat's differential pressure), exhaust pressure of surging condition point by the position of respective point on surge curve.
The surge test point of expection is 3～6 points of picked at random from the Pneumatic Calculation point of mark.For example, Fig. 1, Fig. 2, Fig. 3 are respectively the estimated performance curves of 3 types of turbocompressors providing of turbocompressor manufacturer, choose 6 surge test points according to Fig. 1, choose 7 surge test points according to Fig. 2, choose 5 surge test points according to Fig. 3.
With Fig. 2 is example, can choose following 7 points as the surge test point:
Wherein, the set value that rotating speed SE, static blade angle (aperture ZT) are tested for turbocompressor, exhaust pressure PT, flow PdT are test re-set target value.
2) input of test point: the static blade angle value and/or the generating unit speed value of the turbocompressor operating mode joint mechanism that the surge test point of an expection of input is represented, and exhaust pressure value and/or flow (throat's differential pressure);
3) set of turbocompressor: unit control system is according to the static blade angle value and/or the generating unit speed value of the represented turbocompressor regulating working conditions mechanism of the expection surge test point of input; Control turbocompressor regulating working conditions mechanism 2 and/or rotating speed adjusting mechanism 8 place current surge test point with the turbocompressor group, are about to turbocompressor and are set to represented static blade angle of surge test point and/or rotating speed.Operate respectively as follows for dissimilar turbocompressors: 1. for deciding the adjustable AV of rotating speed stator blade series turbocompressor, the static blade angle that places the surge test point of expection to represent turbocompressor; 2. for the adjustable AV of variable speed stator blade series turbocompressor, the static blade angle that places the surge test point to represent turbocompressor, the generating unit speed value that places the surge test point of expection to represent turbocompressor; 3. for the variable speed turbocompressor, the generating unit speed value that places the surge test point of expection to represent turbocompressor;
4) test parameter collection: place the surge test point of expection when turbocompressor after; Unit control system control test parameter collector 7 is gathered the duty parameter of turbocompressor with certain frequency (this frequency generally be set at 300～500 milliseconds/inferior): said duty parameter comprises stator blade aperture (ZT), rotating speed (SE), inlet temperature (TE), flow or throat's differential pressure (PdT) and inlet pressure, the exhaust pressure (PT, PT1, PT2) of turbocompressor regulating working conditions mechanism, and duty parameter is in order to judge whether turbocompressor gets into surging condition;
5) surging condition is judged: the two adjacent groups duty parameter value that relatively collects, under all identical situation of other test condition, reduce simultaneously as if exhaust pressure and flow in two groups of duty parameter values, and judge that then turbocompressor gets into surging condition;
6) steadily approaching and disengaging fast of surging condition: when turbocompressor does not get into surging condition; Aperture by anti-surge controlling mechanism controller 6 control anti-surge regulating valves 4 slowly turns down, so that the operating point of turbocompressor slowly and stably approaches the surging condition point; If judge that turbocompressor is in surging condition; Think that then turbocompressor has arrived actual pumping point; This moment execution in step 7), simultaneously, increase sharply by anti-surge controlling mechanism controller (6) control anti-surge regulating valve 4 apertures; Make turbocompressor break away from surging condition fast and reposefully, and do not influence the continuation safe operation of unit;
The storage of 7) surge parameter: store in the pumping point parameter storage 12 last group exhaust pressure, flow in two groups of duty parameter values into the EOT of current expection surge test point, execution in step 8 for the test value of expection);
8) judge whether surge test continues: after current pumping point test was accomplished, whether unit control system reminded surge test operator decision surge test to proceed, and was execution in step 2 then) to step 8), finish until all expection surge test points tests; Otherwise finish test, execution in step 9);
9) generate surge curve: behind the EOT, confirm that unit control system reads the surging condition parameter that the test of pumping point parameter storage (12) storage obtains, generate the actual surge curve of turbocompressor through the curve match through the surge test operator;
10) generate the anti-surge curve: surge test operator input anti-surge curve nargin coefficient, this nargin coefficient is taken as 5%～10%, and unit control system obtains surge curve the anti-surge curve of turbocompressor by the nargin coefficient translation downwards of input.
Embodiment 1:
Referring to Fig. 6 to Figure 11, the inventor utilizes following application case that method of the present invention is further explained, and it is AV series axial flow compressor that this embodiment selects turbocompressor for use.At first, programme, use unit control system unit to be controlled automatically then, finally obtain the anti-surge curve of this turbocompressor according to program according to method step of the present invention.
As shown in Figure 6; The surge curve that present embodiment obtains from axial flow compressor Pneumatic Calculation to be tested has been selected the surge test point of 4 expections: (330,25), (395,30), (480; 38) and (575; 49), to 4 surge test points confirming according to step 2 of the present invention) import respectively and carry out actual test to step 8), the duty parameter of each the surge test point that obtains such as Fig. 7 are extremely shown in Figure 10; The surge test point of Fig. 7 expection be (330,25), i.e. exhaust pressure 330Kp, and static blade angle is 25 °, the pumping point that actual test obtains is (320,2.9), i.e. exhaust pressure 320Kp, the differential pressure 2.9Kp of throat; The surge test point of Fig. 8 expection is (395,30), and the pumping point that reality is tested is (380.2,3.88); The surge test point of Fig. 9 expection is (480,38), and the pumping point that reality is tested is (470.2,5.58); The surge test point of Figure 10 expection is (575,49), and the pumping point that reality is tested is (564.5,7.96); Actual surge curve and anti-surge curve according to step 9) of the present invention to step 10) obtains are shown in figure 11, and the curve that is positioned at the top among the figure is a surge curve, and the curve that is positioned at the below is the anti-surge curve.Wherein, according to actual needs, the nargin coefficient of step 9) input is 8%.
Claims (4)
1. the automatic test approach of a turbocompressor surge is characterized in that, specifically comprises the steps:
1) the surge test point of definite expection: 3～6 surge test points of picked at random the Pneumatic Calculation point on the turbocompressor surge curve as expection;
2) input of test point: the static blade angle value and/or the generating unit speed value of the turbocompressor operating mode joint mechanism that the surge test point of an expection of input is represented, and exhaust pressure value and/or flow;
3) set of turbocompressor: unit control system control turbocompressor regulating working conditions mechanism (2) and/or rotating speed adjusting mechanism (8) are set to turbocompressor the represented static blade angle value and/or the generating unit speed value of surge test point of the expection of input;
4) test parameter collection: place the surge test point of expection when turbocompressor after; The duty parameter value that unit control system control test parameter collector (7) is gathered turbocompressor with certain frequency, said duty parameter value comprise aperture (ZT), rotating speed (SE), inlet temperature (TE), flow or throat's differential pressure (PdT) and inlet pressure, the exhaust pressure (PT, PT1, PT2) of turbocompressor;
5) surging condition is judged: the two adjacent groups duty parameter value that relatively collects, under all identical situation of other test condition, reduce simultaneously as if exhaust pressure and flow in two groups of duty parameter values, and judge that then turbocompressor gets into surging condition;
6) steadily approaching and disengaging fast of surging condition: when turbocompressor did not get into surging condition, the aperture of being controlled anti-surge regulating valve (4) by anti-surge controlling mechanism controller (6) turned down; If judge that turbocompressor is in surging condition, think that then turbocompressor has arrived actual pumping point, at this moment execution in step 7), simultaneously, increase by anti-surge controlling mechanism controller (6) control anti-surge regulating valve (4) aperture;
The storage of 7) surge parameter: store in the pumping point parameter storage (12) last group exhaust pressure, flow in two groups of duty parameter values into the EOT of current expection surge test point, execution in step 8 for the test value of expection);
8) judge whether the surge test continues: whether unit control system reminds surge test operator decision surge test to proceed, if then execution in step 2) to step 8), finish until all expection surge test point tests; Otherwise finish test, execution in step 9);
9) generate surge curve: behind the EOT, confirm that unit control system reads the surging condition parameter that the test of pumping point parameter storage (12) storage obtains, generate the actual surge curve of turbocompressor through the curve match through the surge test operator;
10) generate the anti-surge curve: surge test operator input anti-surge curve nargin coefficient, unit control system obtains surge curve the anti-surge curve of turbocompressor by this nargin coefficient translation downwards.
2. the method for claim 1; It is characterized in that; Operate respectively as follows for dissimilar turbocompressors in the said step 3): 1. for deciding the adjustable AV of rotating speed stator blade series turbocompressor, the static blade angle that places the surge test point of expection to represent turbocompressor; 2. for the adjustable AV of variable speed stator blade series turbocompressor, the static blade angle that places the surge test point to represent turbocompressor, the generating unit speed value that places the surge test point of expection to represent turbocompressor; 3. for the variable speed turbocompressor, the generating unit speed value that places the surge test point of expection to represent turbocompressor.
3. the method for claim 1 is characterized in that, in the said step 4) test parameter collector 7 gather the frequency of the duty parameter of turbocompressors be 300～500 milliseconds/inferior.
4. the method for claim 1 is characterized in that, the nargin coefficient in the said step 10) gets 5%～10%.
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