CN108131319B

CN108131319B - Surge detection method and device

Info

Publication number: CN108131319B
Application number: CN201711396657.4A
Authority: CN
Inventors: 费启智; 田盛; 林峰宝; 谭家祥; 赵阳; 胡斌; 田东; 于政日; 高峰; 宋昕烨
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: 2017-12-21
Filing date: 2017-12-21
Publication date: 2019-09-20
Anticipated expiration: 2037-12-21
Also published as: CN108131319A

Abstract

The invention discloses a kind of surge detection method and devices, it is related to a kind of detection technique field, main purpose is to solve existing during artificially carrying out judgement pumping point, quality and professional standards to technical staff require stringent, and it can not accurately identify surge, the problem of causing to bring security risk to unit, influencing compressor production efficiency.Main technical schemes: obtaining the surge parameter of real-time monitoring by parameter interface, and the working condition of present operating point is calculated according to the surge parameter, starts anti-surge valve control system；In the state of the variation of surge line deviation ratio, the working condition, anti-surge valve aperture are adjusted in real time；Judge whether the situation of change of working condition adjusted reaches preset pumping point trigger condition；If reaching preset pumping point trigger condition, it is determined that the operating point of current working status is pumping point, and sends control valve opening instruction to the anti-surge valve control system.

Description

Surge detection method and device

Technical field

The present invention relates to a kind of detection technique fields, more particularly to a kind of surge detection method and device.

Background technique

Surge refers to centrifugal compressor in the process of running, and when load is lower than certain certain value, the normal conveying of gas meets with To destruction, when discharge rate of gas, is few when more, neglects into neglecting, and occurs to shake strongly, simply say, as centrifugal compressed The machine flow pulsation phenomenon that centrifugal compressor occurs when inlet flow rate is less than Surging flow.Since surge is one kind of compressor Intrinsic phenomenon, has biggish harmfulness, and surge often results in the important components such as equipment impeller, main shaft, bearing, guide vane damage It is bad, entire unit is even resulted in sometimes to be scrapped.

Currently, the existing detection to pumping point is usually by artificial micro-judgment method, it is to be enriched by field experience Technical staff judged by the situations of change such as unit vibration and live noise, still, artificially carrying out judgement pumping point In the process, the quality of technical staff and professional standards are required strictly, and can not accurately identifies surge, caused to machine Group brings security risk, influences compressor production efficiency.

Summary of the invention

In view of this, the present invention provides a kind of surge detection method and device, main purpose is to solve existing artificial During carrying out judgement pumping point, quality and professional standards to technical staff are required strictly, and can not accurately identify asthma Vibration occurs, the problem of causing to bring security risk to unit, influence compressor production efficiency.

According to the present invention on one side, a kind of surge detection method is provided, comprising:

The surge parameter of real-time monitoring is obtained by parameter interface, and present operating point is calculated according to the surge parameter Working condition starts anti-surge valve control system；

In the state of the variation of surge line deviation ratio, the working condition, anti-surge valve aperture are adjusted in real time；

Judge whether the situation of change of working condition adjusted reaches preset pumping point trigger condition；

If reaching preset pumping point trigger condition, it is determined that the operating point of current working status is pumping point, and to described Anti-surge valve control system sends control valve opening instruction.

Further, the surge parameter includes pressure data, temperature data, data on flows, anti-surge valve data, orifice plate Differential pressure, it is described in the state of the variation of surge line deviation ratio, the working condition, anti-surge valve aperture are adjusted in real time Before, the method also includes:

Surge line is drawn according to the pressure data, temperature data, data on flows, anti-surge valve data, orifice plate differential pressure, is prevented Surge line bursts at the seams fastly, and generates operating point state diagram, the operating point state diagram for real-time exhibition operating point and surge line, Anti-surge line, burst at the seams fastly between mobile relationship.

Further, whether the situation of change for judging working condition adjusted reaches preset pumping point trigger condition Include:

Judge the rate of change of operating point after adjusting whether more than the first preset threshold；And/or

Judge the change rate of the orifice plate differential pressure monitored after adjustment whether less than the second preset threshold；And/or

Whether operating point is located at the left side of surge line after judging adjustment according to the operating point state diagram；

If described reach preset pumping point trigger condition, it is determined that the operating point of current working status is pumping point, and right The anti-surge valve control system sends control valve opening instruction

When the change rate that the rate of change is more than the first preset threshold, and/or the orifice plate differential pressure is default less than second Threshold value, and/or the operating point are located at the left side of surge line, then confirm that the operating point of current working status is pumping point, and right The antisurge control system sends control valve opening instruction, and the valve degree to valve opening is carried in the control valve opening instruction.

Further, described in the state of the variation of surge line deviation ratio, to the working condition, anti-surge valve aperture Carrying out adjustment in real time includes:

When starting manual detection mode, surge line deviation ratio adjusts the operating point state diagram in real time based on the received The working condition of middle operating point, anti-surge line, bursts at the seams at surge line fastly, and control parameter passes through anti-surge valve control based on the received System call interception anti-surge valve aperture processed；Or,

When starting autosensing mode, the work is adjusted according to the default rule change of surge line deviation ratio in real time The working condition of operating point in dotted state figure surge line, anti-surge line, bursts at the seams fastly, and passes through anti-asthma according to presetting control-algorithm The valve control system that shakes adjusts anti-surge valve aperture.

Further, if described reach preset pumping point trigger condition, it is determined that the operating point of current working status is asthma Shake point, and to the anti-surge valve control system send control valve opening instruction after, the method also includes:

The corresponding pressure data of the pumping point, temperature data, data on flows, anti-surge valve data, orifice plate differential pressure are recorded, And generate pumping point log.

Further, the surge parameter that real-time monitoring is obtained by parameter interface, and according to the surge parameter meter The working condition of present operating point is calculated, before starting anti-surge valve control system, the method also includes:

Channel selection information, mileage setting information, surge calculating parameter information establish parameter interface, configuration based on the received Data connection between network, anti-surge valve control system.

According to the present invention on one side, a kind of surge detection device is provided, comprising:

Acquiring unit, for obtaining the surge parameter of real-time monitoring by parameter interface, and according to the surge parameter meter The working condition of present operating point is calculated, anti-surge valve control system is started；

Adjustment unit is used in the state of the variation of surge line deviation ratio, to the working condition, anti-surge valve aperture It is adjusted in real time；

Judging unit, for judging whether the situation of change of working condition adjusted reaches preset pumping point triggering item Part；

Determination unit, if for reaching preset pumping point trigger condition, it is determined that the operating point of current working status is asthma Shake point, and sends control valve opening instruction to the anti-surge valve control system.

Further, the surge parameter include pressure data, temperature data, data on flows, anti-surge valve data, Orifice plate differential pressure, described device further include:

Drawing unit, for according to the pressure data, temperature data, data on flows, anti-surge valve data, orifice plate differential pressure It draws surge line, anti-surge line, burst at the seams fastly, and generate operating point state diagram, the operating point state diagram is used for real-time exhibition work Make point and surge line, anti-surge line, burst at the seams fastly between mobile relationship.

Further, the judging unit, specifically for judging the rate of change of operating point after adjusting whether more than first Preset threshold；And/or

The judging unit is specifically also used to judge whether the change rate of the orifice plate differential pressure monitored after adjustment is pre- less than second If threshold value；And/or

The judging unit, whether operating point is located at asthma after being specifically also used to judge according to the operating point state diagram adjustment The left side of vibration line；

The determination unit is specifically used for when the rate of change being more than the first preset threshold, and/or the orifice plate differential pressure Change rate be located at the left side of surge line less than the second preset threshold, and/or the operating point, then confirm current working status Operating point is pumping point, and sends control valve opening to the antisurge control system and instruct, in the control valve opening instruction Carry the valve degree to valve opening.

Further,

The adjustment unit is specifically used for when starting manual detection mode, and surge line deviation ratio is real based on the received When adjust the working condition of operating point in the operating point state diagram, surge line, anti-surge line, burst at the seams fastly, and based on the received Control parameter adjusts anti-surge valve aperture by anti-surge valve control system；Or,

The adjustment unit is specifically also used to when starting autosensing mode, according to the default of surge line deviation ratio Rule change adjusts the working condition of operating point in the operating point state diagram in real time, surge line, anti-surge line, bursts at the seams fastly, and Anti-surge valve aperture is adjusted by anti-surge valve control system according to presetting control-algorithm.

Further, described device further include:

Recording unit, for recording the corresponding pressure data of the pumping point, temperature data, data on flows, anti-surge valve Data, orifice plate differential pressure, and generate pumping point log.

Further, described device further include:

Unit is established, is established for channel selection information based on the received, mileage setting information, surge calculating parameter information Parameter interface, configuration network, the data connection between anti-surge valve control system.

According to another aspect of the invention, a kind of storage medium is provided, at least one is stored in the storage medium can It executes instruction, the executable instruction makes processor execute such as the corresponding operation of above-mentioned surge detection method.

In accordance with a further aspect of the present invention, a kind of terminal is provided, comprising: processor, memory, communication interface and communication Bus, the processor, the memory and the communication interface complete mutual communication by the communication bus；

For the memory for storing an at least executable instruction, it is above-mentioned that the executable instruction executes the processor The corresponding operation of surge detection method.

By above-mentioned technical proposal, technical solution provided in an embodiment of the present invention is at least had the advantage that

The present invention provides a kind of surge detection method and devices, obtain the surge of real-time monitoring by parameter interface first Parameter, and according to the working condition of surge parameter calculating present operating point, start anti-surge valve control system, is then breathing heavily In the state of line offset index variation of shaking, the working condition, anti-surge valve aperture are adjusted in real time, then after judging adjustment The situation of change of working condition whether reach preset pumping point trigger condition, if reaching preset pumping point trigger condition, really The operating point for determining current working status is pumping point, and sends control valve opening instruction to the anti-surge valve control system.With Existing quality and professional standards to technical staff require strictly during artificially carrying out judgement pumping point, and can not essence True identification surge occurs, and causes to bring security risk to unit, influences compressor production efficiency and compare, and the embodiment of the present invention is logical It crosses according to real time monitoring surge parameter, the working condition and anti-surge valve of operating point is adjusted under surge deviation ratio variable condition Aperture, if reaching preset pumping point trigger condition according to the judgement of the situation of change of working condition adjusted, it is determined that current The operating point of working condition is pumping point, and adjusts the aperture of anti-surge valve, so that accurate detection goes out the asthma of centrifugal compressor Shake point, without human intervention, to improve the precision of pumping point detection, reduces centrifugal compressor operation and the probability of accident occurs.

The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention, And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can It is clearer and more comprehensible, the followings are specific embodiments of the present invention.

Detailed description of the invention

By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:

Fig. 1 shows a kind of surge detection method flow diagram provided in an embodiment of the present invention；

Fig. 2 shows a kind of working state figures of operating point provided in an embodiment of the present invention；

Fig. 3 shows another surge detection method flow diagram provided in an embodiment of the present invention；

Fig. 4 shows a kind of surge detection instrument schematic diagram provided in an embodiment of the present invention；

Fig. 5 shows a kind of surge detection device block diagram provided in an embodiment of the present invention；

Fig. 6 shows another surge detection device block diagram provided in an embodiment of the present invention；

Fig. 7 shows a kind of terminal schematic diagram provided in an embodiment of the present invention.

Specific embodiment

Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure It is fully disclosed to those skilled in the art.

The embodiment of the invention provides a kind of surge detection methods, as shown in Figure 1, which comprises

101, the surge parameter of real-time monitoring is obtained by parameter interface, and work at present is calculated according to the surge parameter The working condition of point starts anti-surge valve control system.

Wherein, the surge parameter includes that pressure data, temperature data, data on flows, anti-surge valve data, orifice plate are poor Pressure, pressure data includes inlet pressure level, exit pressure levels, and temperature data includes inlet temperature, Outlet Temperature value, flow number According to including inlet flow rate value, outlet stream magnitude, anti-surge valve data include anti-surge valve output valve and value of feedback, and orifice plate differential pressure is The orifice differential pressure of suction port of compressor, the parameter interface are that the data connecting with centrifugal compressor outlet, entrance, anti-surge valve pass Defeated interface, the working condition of present operating point may be displayed on the operating point of an abscissa and ordinate including operating point In state diagram, abscissa is the ratio calculated according to outlet pressure, inlet pressure, and ordinate is according to orifice plate differential pressure, enters The ratio that mouth pressure, entry design calculation of pressure obtain, so as to the working condition of real-time display present operating point, the anti-surge Valve control system is the system for carrying out switch control to anti-surge valve and compressor outlet valve with control algolithm, and the present invention is real Example is applied to be not specifically limited.

It should be noted that can be patrolled for the executing subject of the surge detection method in the embodiment of the present invention to be programmable Volume controller PLC, by the way that the surge detection method in the embodiment of the present invention is corresponded to programming into executing in controller Detecting step, for example, can choose the control equipment of American National instrument (NI) company as surge detection instrument core controller, Device model is NI cDAQ-9133Controller, the controller sampling period and scan period most short reachable 5ms, and AI card adopts The sample period is up to 2ms, DI card, DO card, AO card sampling period possible 7us, wherein can pass through AI card, DI card, DO card, AO card Carry out parameter acquisition and the output of data controlling signal.

102, in the state that surge line deviation ratio changes, the working condition, anti-surge valve aperture are carried out real-time Adjustment.

Wherein, the surge line deviation ratio is the coefficient that surge line deviation is adjusted for real-time change, in general, When starting centrifugal compressor, surge line deviation ratio K is set as 1, as the expected design curve of surge line, implements in the present invention Example in detection process in, by the surge line shown in the state diagram of operating point, when K is gradually reduced, can with K reduction to It moves left, when K is gradually increased, can move right with the increase of K, as shown in Fig. 2, to embody by inclined to surge line The change of coefficient is moved to adjust the position of surge line.In addition, since surge line deviation ratio leads to the change of surge line, for reality When monitor the working condition of present operating point and adjusted in real time therefore, it is necessary to during surge line deviation ratio is continually changing The abscissa and ordinate of present operating point monitor whether pumping point occur to realize.

It should be noted that in general, in centrifugal compressor operational process, with factors such as time, temperature, pressures Variation, the state motion track of the operating point shown in the state diagram of operating point are also as ought not towards surge line movement When opening anti-surge valve, the state of operating point finally will appear surge phenomenon with the variation of the factors such as time, temperature, pressure.Cause This needs to adjust the aperture of anti-surge valve in real time, in the state of the variation of surge line deviation ratio to prevent there is pumping point.Its In, it can be according to the principle of make before break, when starting anti-surge valve control system, anti-surge valve for the aperture of anti-surge valve In closed state, after working condition is moved to anti-surge line, anti-surge valve opens certain aperture by control system, is breathing heavily In the state of line offset index variation of shaking, anti-surge valve is gradually closed until determining pumping point.

103, judge whether the situation of change of working condition adjusted reaches preset pumping point trigger condition.

Wherein, the preset pumping point trigger condition is the preset variation speed for operating point when surge phenomenon occur Rate, orifice differential pressure reduce situation, operating point and the relationship between bursting at the seams fastly, are set for judging whether to reach according to above-mentioned condition Pumping point.For example, being moved to the left during the operating point shown in the state diagram of operating point is moved to the left by calculating operating point Differential rate judge whether reach preset threshold 10.

It should be noted that the rate of change for the operating point for including in preset pumping point trigger condition, orifice differential pressure reduce Situation, operating point and the relationship between bursting at the seams fastly, can according to first judging whether the rate of change of operating point reaches preset threshold, Then successively judge orifice differential pressure reduce situation, operating point and fastly burst at the seams between relationship whether reach predetermined condition, this hair Bright embodiment is not specifically limited.

If 104, reaching preset pumping point trigger condition, it is determined that the operating point of current working status is pumping point, and right The anti-surge valve control system sends control valve opening instruction.

Wherein, the control valve opening instruction is by currently executing drive of the output interface of controller to control anti-surge valve Dynamic equipment sends control valve opening instruction, in general, in order to which the working condition of present operating point is retracted safety from surge region The aperture of a fixed safety can be arranged in the aperture of anti-surge valve by region, for example, for opening to whole 10%, this hair Bright embodiment is not specifically limited.

It should be noted that being sent out by program setting to antisurge control system when reaching threshold value surge trigger condition It send control valve opening to instruct, and the corresponding surge reference record of the working condition of the operating point at this moment is got off, as asthma The trigger condition of vibration point.In addition, anti-surge valve control system can be PID control system, to realize opening for automatic regulating valve Degree.

The present invention provides a kind of surge detection methods, with existing during artificially carrying out judgement pumping point, to technology The quality and professional standards of personnel requires strictly, and can not accurately identify surge, causes to bring safety wind to unit Danger, influence compressor production efficiency and compare, the embodiment of the present invention by according to real time monitoring surge parameter, in surge deviation ratio The working condition of operating point and the aperture of anti-surge valve are adjusted under variable condition, if according to the variation feelings of working condition adjusted Condition judgement reaches preset pumping point trigger condition, it is determined that the operating point of current working status is pumping point, and adjusts anti-surge The aperture of valve, so that accurate detection goes out the pumping point of centrifugal compressor, without human intervention, to improve pumping point detection Precision reduces centrifugal compressor operation and the probability of accident occurs.

The embodiment of the invention provides another surge detection methods, as shown in Figure 3, which comprises

201, based on the received channel selection information, mileage setting information, surge calculating parameter information establish parameter interface, Data connection between configuration network, anti-surge valve control system.

For the embodiment of the present invention, due to using controller to use as the executing subject of current surge detection NI cDAQ-9133Controller, and in order to realize by between controller, centrifugal compressor, anti-surge valve control system into The transmission of row data, needs the channel selection information inputted according to technical staff, mileage setting information, surge calculating parameter information to build Vertical parameter interface, configuration network, the data connection between antisurge control system.Wherein, channel selection information, which refers to, is counted According to the communication channel of transmission, in general, be LABVIEW software used in NI cDAQ-9133Controller controller, it can To carry out data interaction by selection communication channel, mileage setting information is that current controller progress surge detection can be run Time or the information such as number, surge calculating parameter information refer to the surge ginseng for the working condition that can calculate present operating point Number, e.g., temperature, pressure etc., these parameters can be by being connected between centrifugal compressor and the device of current detection surge Data line is transmitted.

It should be noted that parameter interface, configuration network, antisurge control system can be NI cDAQ- It is already existing in 9133Controller controller, it is thus only necessary to be manually set, or re-download or Installation into controller, thus will from external received data receiver into controller in be measured in real time and handle, the present invention Embodiment is not specifically limited.

202, the surge parameter of real-time monitoring is obtained by parameter interface, and work at present is calculated according to the surge parameter The working condition of point starts anti-surge valve control system.

This step is identical as step 101 method shown in FIG. 1, and details are not described herein.

It should be noted that since centrifugal compressor is immovable large scale equipment, for the ease of the detection of surge, originally The executing subject of surge detection method in inventive embodiments selects to be NI cDAQ-9133Controller controller, due to Controller is small in size, controller can be encapsulated in the cabinet of an instrument structure, forms a whole set of surge detection instrument, such as schemes It is easy to operate so as to carry test at any time shown in 4, it is stable.

203, surge is drawn according to the pressure data, temperature data, data on flows, anti-surge valve data, orifice plate differential pressure Line anti-surge line, bursts at the seams fastly, and generates operating point state diagram.

Wherein, between the operating point state diagram is used for real-time exhibition operating point and surge line, anti-surge line, bursts at the seams fastly Mobile relationship, the surge line are the curve of the appearance surge phenomenon shown in the state diagram of operating point, and the anti-surge line is Technical staff's setting there are proportionate relationship and carries out the curve of anti-surge operation and works as also to burst at the seams slowly between surge line Surge valve is beaten in automatically or semi-automatically state, and system accounting calculates most economical surge valve and opens after operating point triggering anti-surge line Degree, it is described to be burst at the seams fastly for the curve of surge valve standard-sized sheet after the triggering of operating point, in general, as shown in Fig. 2, surge line is the leftmost side Curve is burst at the seams fastly for intermediate curve, the curve that anti-surge line is the rightmost side, is existed in moving process between this three lines and is moved Dynamic proportionate relationship.

It should be noted that the ordinate of operating point state diagram is centrifugal compressor outlet pressure and inlet pressure ratio, The calculation formula of abscissa is that centrifugal compressor inlet hole plate differential pressure × centrifugal compressor entry design pressure/centrifugal compressor enters Mouth pressure × 100%.In addition, in the state diagram of operating point, generally using the left area of surge line as surge region, with anti-surge The right area of line is safety zone, and when executing current surge detection method, the working condition of operating point is in the initial of detection To be located at safety zone under state, and with the continuous variation of the working condition of centrifugal compressor, operating point work it is dotted Position in state figure can constantly move to the left, to approach surge line.By generating operating point state diagram, to monitor at any time Surge line, anti-surge line burst at the seams and the working condition of operating point fastly, consequently facilitating the variation of surge deviation ratio is to each area's line And the monitoring of the working condition of operating point.

204a, when starting manual detection mode, surge line deviation ratio adjusts the operating point in real time based on the received The working condition of operating point in state diagram, anti-surge line, bursts at the seams at surge line fastly, and control parameter passes through anti-asthma based on the received The valve control system that shakes adjusts anti-surge valve aperture.

For the embodiment of the present invention, since detection pattern can be set as hand according to different artificial demands, such as rapidity Dynamic detection pattern, can be adjusted by the surge line deviation ratio that reception technique personnel input operating point working condition, Surge line, bursts at the seams at anti-surge line fastly, to obtain new operating point state diagram.Wherein, the received surge line deviation ratio For any real number between 0-1, since the change of surge line deviation ratio directly affects surge line, anti-surge line, fastly bursts at the seams Between curved line relation, in general, when initial surge line deviation ratio K be 1 when, corresponding anti-surge valve aperture be initially open Degree, can be set as any one aperture, and then during receiving reduction K value, corresponding control parameter is so that anti- The specific opening value that surge valve opening reduces, the specific value embodiment of the present invention is without limitation.

It should be noted that antisurge control system can according to the control parameter received come to anti-surge valve aperture into Row adjustment, in general, the aperture of anti-surge valve can carry out aperture with a proportional integral derivative control algolithm building control loop Control, the embodiment of the present invention are not specifically limited.For example, being determined as starting manual detection, then passing through in the initial stage of detection The means such as anti-surge valve aperture and close compressor outlet valve opening are closed, compressor flowrate is reduced or improves compressor outlet pressure Power, it is therefore an objective to be moved to the left operating point and approach anti-surge line, when encountering anti-surge line, start in the embodiment of the present invention Surge detection method, so that anti-surge valve is opened, K value is 1, and the working condition of operating point is monitored, when fastly close to anti-surge When line, according to reduced K value is received, anti-surge line is moved to the left, and the closure aperture for receiving anti-surge valve carries out closing anti-asthma Shake valve, reduces K and closes anti-surge valve alternately, until system detection to compressor surge.

For the embodiment of the present invention, the step 204b arranged side by side with step 204a, when starting autosensing mode, according to asthma Vibration line offset coefficient default rule change adjust in real time the working condition of operating point in the operating point state diagram, surge line, Anti-surge line bursts at the seams fastly, and adjusts anti-surge valve aperture by anti-surge valve control system according to presetting control-algorithm.

For the embodiment of the present invention, since detection pattern can be set as certainly according to different artificial demand, such as accuracy Dynamic detection pattern can indicate that surge line deviation ratio is changed by default rule change, then according to the surge of variation The working condition of line offset coefficient adjustment operating point, anti-surge line, bursts at the seams at surge line fastly, to obtain new work dotted state Figure.Wherein, the default rule change of the surge line deviation ratio can be that operation, such as K are reduced since 1 according to equal difference mode It is reduced since 1 according to 0.1 tolerance, the embodiment of the present invention is not specifically limited.The presetting control-algorithm can be Set the pid control algorithm of control parameter, or intelligent control algorithm etc., the embodiment of the present invention is not specifically limited.

For example, being determined as starting automatic detection, COEFFICIENT K can subtract automatically to set rate at this time in the initial stage of detection It is small, since operating point is on the right side of anti-surge line, anti-surge valve can be automatically closed by PID at this time, i.e. operating point is to anti-surge line It is mobile, once operating point catch up with anti-surge line, then certain aperture is automatically opened according to PID control anti-surge valve, anti-surge line after Continuous to pull open continuation to the left, at this point, anti-surge valve can continue to be automatically closed, operating point continues to be moved to the left, until system detection Until compressor surge, detection process is completed.

205a, judge the rate of change of operating point after adjusting whether more than the first preset threshold.

Wherein, the differential that the rate of change of the operating point is moved to the left for the abscissa of operating point in the state diagram of operating point Rate, in order to determine the appearance of pumping point in time and accurately, first preset threshold is the shifting of preset operating point The maximum value of dynamic differential speed can be 10, and the embodiment of the present invention is not specifically limited.

It should be noted that in general, differential rate 10 be have technical staff determine most accurately there is surge phenomenon When operating point mobile differential rate, therefore, the rate that the abscissa of operating point is moved to the left is if more than 10, then certain to occur Surge phenomenon, thus using the condition of the judgement in step 205a as the first layer examination criteria of detection pumping point, to realize The accuracy of surge detection.

For the embodiment of the present invention, the step 205b arranged side by side with step 205a, the orifice plate differential pressure monitored after adjustment is judged Whether change rate is less than the second preset threshold.

For the embodiment of the present invention, due to that can have differential pressure between centrifugal compressor in operation suction port of compressor orifice plate, There is strong variation since surge phenomenon can go out orifice plate differential pressure in as orifice plate differential pressure, preset second default threshold Value is the minimum value of the appearance according to the determining most accurate orifice plate differential pressure of technical staff in surge, such as reduces 12%, i.e., For surge generation, the embodiment of the present invention is not specifically limited.By judging the change rate of orifice plate differential pressure again, detection surge is improved The accuracy of generation, to realize the accurate detection to surge.

For the embodiment of the present invention, with step 205a step 205c arranged side by side, according to the operating point state diagram judge to adjust Whether operating point is located at the left side of surge line after whole.

For the embodiment of the present invention, since surge line best embodies out and no surge occurs in the working state figure of operating point Therefore whether phenomenon there is surge phenomenon to be determined more accurately out, whether can be located at surge line according to operating point Left side is to determine whether be pumping point, to improve the accuracy of surge detection.

For the embodiment of the present invention, step 205a, the step 206 after 205b, 205c, when the rate of change is more than the The change rate of one preset threshold, and/or the orifice plate differential pressure is located at surge less than the second preset threshold, and/or the operating point The left side of line then confirms that the operating point of current working status is pumping point, and sends regulating valve to the antisurge control system Opening degree instruction.

Wherein, the valve degree carried in the control valve opening instruction to valve opening will be to valve opening in order to avoid valve opening is excessive Valve degree be set as 10%-15%, in general, when there is surge, control valve opening instruction is only once triggered, and, often A Rule of judgment is all anti-surge valve to be opened 10%-15%, so that operating point is retracted safety zone.

It should be noted that avoiding valve opening excessive to improve the reliability of surge detection, safety, step is being carried out When deterministic process between 205a, 205b, 205c, rate of change be more than the first preset threshold, orifice plate differential pressure change rate be less than Second preset threshold, operating point are located in the left side three of surge line in situation simply by the presence of any one situation, then illustrate exist Surge, situation is all under security situation only in three, and present operating point is just trouble free service, may then pass through and adjusts again Surge line deviation ratio adjusts surge line.In addition, if the rate of change to be not above the first preset threshold, the orifice plate poor The change rate of pressure is greater than or equal to the right side that the second preset threshold, the operating point are located at surge line, then return step 204a or 204b is continued to execute.

207, the corresponding pressure data of the pumping point, temperature data, data on flows, anti-surge valve data, orifice plate are recorded Differential pressure, and generate pumping point log.

For the embodiment of the present invention, in order to when occurring surge phenomenon in centrifugal compressor pressure data, temperature data, Data on flows, anti-surge valve data, orifice plate differential pressure are analyzed and are applied, and need to record the corresponding specific number of current pumping point According to, and raw surge log, step is redefined so that analysis can be carried out after repeated detection according to the data in pumping point log Condition and preset threshold in rapid 205a, 205b, 205c.

The present invention provides another surge detection method, the embodiment of the present invention by establish parameter interface, configuration network, Data connection between anti-surge valve control system obtains pressure data, temperature data, data on flows, anti-surge valve number in real time According to, orifice plate differential pressure, and display surge line, anti-surge line, the operating point state diagram burst at the seams fastly are drawn, in manually or automatically mode Under, the working condition of the operating point in the state diagram of operating point is adjusted according to the situation of change of surge line deviation ratio, surge line, is prevented Surge line bursts at the seams and the aperture of anti-surge valve fastly, by judging the rate of change of operating point, the change rate of orifice plate differential pressure, work Make point and be located at the position of surge line to determine whether surge phenomenon, when for pumping point, by the aperture of anti-surge valve open for Default valve degree, so that the detection of pumping point is completed, so that operator can be completed without very high technical level, and in unit The relevant parameter curve of cyclical fluctuations is write down in a flash in critical surge, while anti-surge valve fast quick-opening valve automatically, carries out safeguard protection control The actual measurement work of system, more scientific, accurate, safe completion pumping point reduces centrifugation to improve the precision of pumping point detection Compressor runs the probability for accident occur.

Further, as the realization to method shown in above-mentioned Fig. 1, the embodiment of the invention provides a kind of surge detection dresses It sets, as shown in figure 5, the device includes: acquiring unit 31, adjustment unit 32, judging unit 33, determination unit 34.

Acquiring unit 31, for obtaining the surge parameter of real-time monitoring by parameter interface, and according to the surge parameter The working condition of present operating point is calculated, anti-surge valve control system is started；The acquiring unit 31 is that surge detection device is held Row obtains the surge parameter of real-time monitoring by parameter interface, and the work shape of present operating point is calculated according to the surge parameter State starts the program module of anti-surge valve control system.

Adjustment unit 32, for opening the working condition, anti-surge valve in the state of the variation of surge line deviation ratio Degree is adjusted in real time；The adjustment unit 32 is that surge detection device executes in the state of the variation of surge line deviation ratio, The program module that the working condition, anti-surge valve aperture are adjusted in real time.

Judging unit 33, for judging whether the situation of change of working condition adjusted reaches preset pumping point triggering item Part；The judging unit 33 is that judge whether the situation of change of working condition adjusted reaches preset for the execution of surge detection device The program module of pumping point trigger condition.

Determination unit 34, if for reaching preset pumping point trigger condition, it is determined that the operating point of current working status is Pumping point, and control valve opening instruction is sent to the anti-surge valve control system.The determination unit 34 is surge detection dress If setting execution reaches preset pumping point trigger condition, it is determined that the operating point of current working status is pumping point, and to described anti- Surge valve control system sends the program module of control valve opening instruction.

The present invention provides a kind of surge detection devices, with existing during artificially carrying out judgement pumping point, to technology The quality and professional standards of personnel requires strictly, and can not accurately identify surge, causes to bring safety wind to unit Danger, influence compressor production efficiency and compare, the embodiment of the present invention by according to real time monitoring surge parameter, in surge deviation ratio The working condition of operating point and the aperture of anti-surge valve are adjusted under variable condition, if according to the variation feelings of working condition adjusted Condition judgement reaches preset pumping point trigger condition, it is determined that the operating point of current working status is pumping point, and adjusts anti-surge The aperture of valve, so that accurate detection goes out the pumping point of centrifugal compressor, without human intervention, to improve pumping point detection Precision reduces centrifugal compressor operation and the probability of accident occurs.

Further, as the realization to method shown in above-mentioned Fig. 2, the embodiment of the invention provides another surge detections Device, as shown in fig. 6, the device includes: acquiring unit 41, adjustment unit 42, judging unit 43, determination unit 44, draws list Member 45, establishes unit 47 at recording unit 46.

Acquiring unit 41, for obtaining the surge parameter of real-time monitoring by parameter interface, and according to the surge parameter The working condition of present operating point is calculated, anti-surge valve control system is started；

Adjustment unit 42, for opening the working condition, anti-surge valve in the state of the variation of surge line deviation ratio Degree is adjusted in real time；

Judging unit 43, for judging whether the situation of change of working condition adjusted reaches preset pumping point triggering item Part；

Determination unit 44, if for reaching preset pumping point trigger condition, it is determined that the operating point of current working status is Pumping point, and control valve opening instruction is sent to the anti-surge valve control system.

Further, described device further include:

Drawing unit 45, for poor according to the pressure data, temperature data, data on flows, anti-surge valve data, orifice plate Pressure draws surge line, anti-surge line, bursts at the seams fastly, and generates operating point state diagram, and the operating point state diagram is used for real-time exhibition Operating point and surge line, anti-surge line, burst at the seams fastly between mobile relationship.

Specifically, the judging unit 43, specifically for judging the rate of change of operating point after adjusting whether more than first Preset threshold；And/or

Whether the judging unit 43 is specifically also used to judge the change rate of the orifice plate differential pressure monitored after adjustment less than second Preset threshold；And/or

The judging unit 43, whether operating point is located at after being specifically also used to judge according to the operating point state diagram adjustment The left side of surge line；

The determination unit 44 is specifically used for when the rate of change being more than that the first preset threshold, and/or the orifice plate are poor The change rate of pressure is located at the left side of surge line less than the second preset threshold, and/or the operating point, then confirms current working status Operating point be pumping point, and control valve opening instruction, control valve opening instruction are sent to the antisurge control system In carry valve degree to valve opening.

Specifically, the adjustment unit 42, is specifically used for when starting manual detection mode, surge line is inclined based on the received It moves coefficient to adjust the working condition of operating point in the operating point state diagram in real time, surge line, anti-surge line, burst at the seams fastly, and root Anti-surge valve aperture is adjusted by anti-surge valve control system according to received control parameter；Or,

The adjustment unit 42 is specifically also used to when starting autosensing mode, according to the pre- of surge line deviation ratio If rule change adjusts the working condition of operating point in the operating point state diagram in real time, surge line, anti-surge line, bursts at the seams fastly, And anti-surge valve aperture is adjusted by anti-surge valve control system according to presetting control-algorithm.

Further, described device further include:

Recording unit 46, for recording the corresponding pressure data of the pumping point, temperature data, data on flows, anti-surge Valve data, orifice plate differential pressure, and generate pumping point log.

Further, described device further include:

Unit 47 is established, is built for channel selection information based on the received, mileage setting information, surge calculating parameter information Vertical parameter interface, configuration network, the data connection between anti-surge valve control system.

The present invention provides another surge detection device, the embodiment of the present invention by establish parameter interface, configuration network, Data connection between anti-surge valve control system obtains pressure data, temperature data, data on flows, anti-surge valve number in real time According to, orifice plate differential pressure, and display surge line, anti-surge line, the operating point state diagram burst at the seams fastly are drawn, in manually or automatically mode Under, the working condition of the operating point in the state diagram of operating point is adjusted according to the situation of change of surge line deviation ratio, surge line, is prevented Surge line bursts at the seams and the aperture of anti-surge valve fastly, by judging the rate of change of operating point, the change rate of orifice plate differential pressure, work Make point and be located at the position of surge line to determine whether surge phenomenon, when for pumping point, by the aperture of anti-surge valve open for Default valve degree, so that the detection of pumping point is completed, so that operator can be completed without very high technical level, and in unit The relevant parameter curve of cyclical fluctuations is write down in a flash in critical surge, while anti-surge valve fast quick-opening valve automatically, carries out safeguard protection control The actual measurement work of system, more scientific, accurate, safe completion pumping point reduces centrifugation to improve the precision of pumping point detection Compressor runs the probability for accident occur.

A kind of storage medium is provided according to an embodiment of the present invention, and it is executable that the storage medium is stored at least one The surge detection method in above-mentioned any means embodiment can be performed in instruction, the computer executable instructions.

Fig. 7 shows a kind of structural schematic diagram of the terminal provided according to an embodiment of the present invention, and the present invention is specifically real Example is applied not limit the specific implementation of terminal.

As shown in fig. 7, the terminal may include: processor (processor) 502, communication interface (Communications Interface) 504, memory (memory) 506 and communication bus 508.

Wherein: processor 502, communication interface 504 and memory 506 complete mutual lead to by communication bus 508 Letter.

Communication interface 504, for being communicated with the network element of other equipment such as client or other servers etc..

Processor 502 can specifically execute the correlation in above-mentioned surge detection embodiment of the method for executing program 510 Step.

Specifically, program 510 may include program code, which includes computer operation instruction.

Processor 502 may be central processor CPU or specific integrated circuit ASIC (Application Specific Integrated Circuit), or be arranged to implement the integrated electricity of one or more of the embodiment of the present invention Road.The one or more processors that terminal includes can be same type of processor, such as one or more CPU；It is also possible to Different types of processor, such as one or more CPU and one or more ASIC.

Memory 506, for storing program 510.Memory 506 may include high speed RAM memory, it is also possible to further include Nonvolatile memory (non-volatile memory), for example, at least a magnetic disk storage.

Program 510 specifically can be used for so that processor 502 executes following operation:

Algorithm and display are not inherently related to any particular computer, virtual system, or other device provided herein. Various general-purpose systems can also be used together with teachings based herein.As described above, it constructs required by this kind of system Structure be obvious.In addition, the present invention is also not directed to any particular programming language.It should be understood that can use various Programming language realizes summary of the invention described herein, and the description done above to language-specific is to disclose this hair Bright preferred forms.

In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that implementation of the invention Example can be practiced without these specific details.In some instances, well known method, structure is not been shown in detail And technology, so as not to obscure the understanding of this specification.

Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more of the various inventive aspects, Above in the description of exemplary embodiment of the present invention, each feature of the invention is grouped together into single implementation sometimes In example, figure or descriptions thereof.However, the disclosed method should not be interpreted as reflecting the following intention: i.e. required to protect Shield the present invention claims features more more than feature expressly recited in each claim.More precisely, as following Claims reflect as, inventive aspect is all features less than single embodiment disclosed above.Therefore, Thus the claims for following specific embodiment are expressly incorporated in the specific embodiment, wherein each claim itself All as a separate embodiment of the present invention.

Those skilled in the art will understand that can be carried out adaptively to the module in the equipment in embodiment Change and they are arranged in one or more devices different from this embodiment.It can be the module or list in embodiment Member or component are combined into a module or unit or component, and furthermore they can be divided into multiple submodule or subelement or Sub-component.Other than such feature and/or at least some of process or unit exclude each other, it can use any Combination is to all features disclosed in this specification (including adjoint claim, abstract and attached drawing) and so disclosed All process or units of what method or apparatus are combined.Unless expressly stated otherwise, this specification is (including adjoint power Benefit require, abstract and attached drawing) disclosed in each feature can carry out generation with an alternative feature that provides the same, equivalent, or similar purpose It replaces.

In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments In included certain features rather than other feature, but the combination of the feature of different embodiments mean it is of the invention Within the scope of and form different embodiments.For example, in the following claims, embodiment claimed is appointed Meaning one of can in any combination mode come using.

Various component embodiments of the invention can be implemented in hardware, or to run on one or more processors Software module realize, or be implemented in a combination thereof.It will be understood by those of skill in the art that can be used in practice Microprocessor or digital signal processor (DSP) are realized in surge detection method and device according to an embodiment of the present invention The some or all functions of some or all components.The present invention is also implemented as executing method as described herein Some or all device or device programs (for example, computer program and computer program product).Such reality Existing program of the invention can store on a computer-readable medium, or may be in the form of one or more signals. Such signal can be downloaded from an internet website to obtain, and perhaps be provided on the carrier signal or in any other forms It provides.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and ability Field technique personnel can be designed alternative embodiment without departing from the scope of the appended claims.In the claims, Any reference symbol between parentheses should not be configured to limitations on claims.Word "comprising" does not exclude the presence of not Element or step listed in the claims.Word "a" or "an" located in front of the element does not exclude the presence of multiple such Element.The present invention can be by means of including the hardware of several different elements and being come by means of properly programmed computer real It is existing.In the unit claims listing several devices, several in these devices can be through the same hardware branch To embody.The use of word first, second, and third does not indicate any sequence.These words can be explained and be run after fame Claim.

The embodiment of the present invention further comprises:

A1, a kind of surge detection method, comprising:

A2, method according to a1, the surge parameter include pressure data, temperature data, data on flows, anti-surge Valve data, orifice plate differential pressure, it is described in the state of the variation of surge line deviation ratio, to the working condition, anti-surge valve aperture Before adjust in real time, the method also includes:

Whether A3, the method according to A2, the situation of change for judging working condition adjusted reach preset asthma A trigger condition is put in vibration

A4, the method according to A2 or A3, it is described in the state of the variation of surge line deviation ratio, to the work shape State, anti-surge valve aperture carry out adjustment in real time

A5, method according to a4, if described reach preset pumping point trigger condition, it is determined that current working status Operating point is pumping point, and to the anti-surge valve control system send control valve opening instruction after, the method also includes:

A6, according to the described in any item methods of A1-A5, the surge parameter that real-time monitoring is obtained by parameter interface, And the working condition of present operating point is calculated according to the surge parameter, and before starting anti-surge valve control system, the method Further include:

B7, a kind of surge detection device, comprising:

B8, the device according to B7, the surge parameter include pressure data, temperature data, data on flows, prevent Surge valve data, orifice plate differential pressure, described device further include:

B9, the device according to B8,

The judging unit, specifically for judging the rate of change of operating point after adjusting whether more than the first preset threshold； And/or

B10, the device according to B8 or B9,

B11, device according to b10, described device further include:

B12, according to the described in any item devices of B7-B11, described device further include:

C13, a kind of storage medium are stored with an at least executable instruction, the executable instruction in the storage medium Processor is set to execute the corresponding operation of surge detection method as described in any one of A1-A6.

D14, a kind of terminal, comprising: processor, memory, communication interface and communication bus, the processor described are deposited Reservoir and the communication interface complete mutual communication by the communication bus；

The memory executes the processor such as storing an at least executable instruction, the executable instruction The corresponding operation of surge detection method described in any one of A1-A6.

Claims

1. a kind of surge detection method characterized by comprising

The surge parameter of real-time monitoring is obtained by parameter interface, and the work of present operating point is calculated according to the surge parameter State starts anti-surge valve control system；

If reaching preset pumping point trigger condition, it is determined that the operating point of current working status is pumping point, and to the anti-asthma The valve control system that shakes sends control valve opening instruction.

2. the method according to claim 1, wherein the surge parameter includes pressure data, temperature data, stream Measure data, anti-surge valve data, orifice plate differential pressure, it is described surge line deviation ratio variation in the state of, to the working condition, Before anti-surge valve aperture adjust in real time, the method also includes:

Surge line, anti-surge are drawn according to the pressure data, temperature data, data on flows, anti-surge valve data, orifice plate differential pressure Line bursts at the seams fastly, and generates operating point state diagram, and the operating point state diagram is for real-time exhibition operating point and surge line, anti-asthma Vibration line, burst at the seams fastly between mobile relationship.

3. according to the method described in claim 2, it is characterized in that, the situation of change of the judgement working condition adjusted is It is no to reach preset pumping point trigger condition and include:

If described reach preset pumping point trigger condition, it is determined that the operating point of current working status is pumping point, and to described Anti-surge valve control system sends control valve opening instruction

When the rate of change be more than the first preset threshold, and/or the orifice plate differential pressure change rate less than the second preset threshold, And/or the operating point is located at the left side of surge line, then confirms that the operating point of current working status is pumping point, and to described anti- Surge control system sends control valve opening instruction, and the valve degree to valve opening is carried in the control valve opening instruction.

4. according to the method in claim 2 or 3, which is characterized in that it is described in the state of the variation of surge line deviation ratio, Carrying out adjustment in real time to the working condition, anti-surge valve aperture includes:

When starting manual detection mode, surge line deviation ratio adjusts work in the operating point state diagram in real time based on the received Make the working condition of point, surge line, anti-surge line, burst at the seams fastly, and control parameter passes through anti-surge valve control system based on the received System adjustment anti-surge valve aperture；Or,

When starting autosensing mode, it is dotted that the work is adjusted according to the default rule change of surge line deviation ratio in real time The working condition of operating point in state figure surge line, anti-surge line, bursts at the seams fastly, and passes through anti-surge valve according to presetting control-algorithm Control system adjusts anti-surge valve aperture.

5. according to the method described in claim 4, it is characterized in that, if described reach preset pumping point trigger condition, it is determined that The operating point of current working status be pumping point, and to the anti-surge valve control system send control valve opening instruction after, The method also includes:

The corresponding pressure data of the pumping point, temperature data, data on flows, anti-surge valve data, orifice plate differential pressure are recorded, and raw At pumping point log.

6. the method according to claim 1, wherein the surge for obtaining real-time monitoring by parameter interface is joined Number, and according to the working condition of surge parameter calculating present operating point, before starting anti-surge valve control system, the side Method further include:

Channel selection information, mileage setting information, surge calculating parameter information establish parameter interface, configuration net based on the received Data connection between network, anti-surge valve control system.

7. a kind of surge detection device characterized by comprising

Acquiring unit is worked as obtaining the surge parameter of real-time monitoring by parameter interface, and according to surge parameter calculating The working condition of preceding operating point starts anti-surge valve control system；

Adjustment unit, for being carried out to the working condition, anti-surge valve aperture in the state of the variation of surge line deviation ratio Adjustment in real time；

Judging unit, for judging whether the situation of change of working condition adjusted reaches preset pumping point trigger condition；

Determination unit, if for reaching preset pumping point trigger condition, it is determined that the operating point of current working status is pumping point, And control valve opening instruction is sent to the anti-surge valve control system.

8. device according to claim 7, which is characterized in that the surge parameter includes pressure data, temperature number According to, data on flows, anti-surge valve data, orifice plate differential pressure, described device further include:

Drawing unit, for being drawn according to the pressure data, temperature data, data on flows, anti-surge valve data, orifice plate differential pressure Surge line anti-surge line, bursts at the seams fastly, and generates operating point state diagram, and the operating point state diagram is used for real-time exhibition operating point With surge line, anti-surge line, fastly burst at the seams between mobile relationship.

9. device according to claim 8, which is characterized in that

The judging unit, specifically for judging the rate of change of operating point after adjusting whether more than the first preset threshold；With/ Or,

Whether the judging unit is specifically also used to judge the change rate of the orifice plate differential pressure monitored after adjustment less than the second default threshold Value；And/or

The judging unit, whether operating point is located at surge line after being specifically also used to judge according to the operating point state diagram adjustment Left side；

The determination unit, specifically for being more than the change of the first preset threshold, and/or the orifice plate differential pressure when the rate of change Rate is located at the left side of surge line less than the second preset threshold, and/or the operating point, then confirms the work of current working status Point is pumping point, and sends control valve opening instruction to the antisurge control system, is carried in the control valve opening instruction Need the valve degree of valve opening.

10. device according to claim 8 or claim 9, which is characterized in that

The adjustment unit is specifically used for when starting manual detection mode, and surge line deviation ratio is adjusted in real time based on the received The working condition of operating point in the whole operating point state diagram surge line, anti-surge line, bursts at the seams fastly, and controls based on the received Parameter adjusts anti-surge valve aperture by anti-surge valve control system；Or,

The adjustment unit is specifically also used to when starting autosensing mode, according to the default variation of surge line deviation ratio Rule adjusts the working condition of operating point in the operating point state diagram in real time, surge line, anti-surge line, bursts at the seams fastly, and according to Presetting control-algorithm adjusts anti-surge valve aperture by anti-surge valve control system.

11. device according to claim 10, which is characterized in that described device further include:

Recording unit, for record the corresponding pressure data of the pumping point, temperature data, data on flows, anti-surge valve data, Orifice plate differential pressure, and generate pumping point log.

12. device according to claim 7, which is characterized in that described device further include:

Unit is established, establishes parameter for channel selection information based on the received, mileage setting information, surge calculating parameter information Interface, configuration network, the data connection between anti-surge valve control system.

13. a kind of terminal, comprising: processor, memory, communication interface and communication bus, the processor, the memory and The communication interface completes mutual communication by the communication bus；

The memory executes the processor as right is wanted for storing an at least executable instruction, the executable instruction Ask the corresponding operation of surge detection method described in any one of 1-6.