CN102392812A - Surge control system of compressor unit - Google Patents
Surge control system of compressor unit Download PDFInfo
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- CN102392812A CN102392812A CN2011101557470A CN201110155747A CN102392812A CN 102392812 A CN102392812 A CN 102392812A CN 2011101557470 A CN2011101557470 A CN 2011101557470A CN 201110155747 A CN201110155747 A CN 201110155747A CN 102392812 A CN102392812 A CN 102392812A
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Abstract
The invention provides a surge control system of a compressor unit and belongs to the technical field of compressor unit automation control. The surge control system of the compressor unit provided by the invention is low in system operation failure rate and low in long-period operating cost. The surge control system comprises a braker, a high-speed pressure transmitter, a throttling device, a temperature sensor and a gasp-preventing regulating valve and is structurally characterized in that the controller is respectively connected with the high-speed pressure transmitter, the throttling device, the temperature sensor and the gasp-preventing regulating valve, and the high-speed pressure transmitter is used for detecting the pressures of the inlet and outlet of a compressor, converting the pressures into a standard analog quantity signal and sending the standard analog quantity signal into the controller; the throttling device is used for detecting air inflow and air outflow of the compressor, converting the air inflow and the air outflow into a standard analog quantity signal and sending the standard analog quantity signal into the controller; the temperature sensor is used for detecting the inlet temperature and outlet temperature of the compressor, converting the inlet temperature and the outlet temperature into a standard analog quantity signal and sending the standard analog quantity signal into the controller; and the controller is used for receiving pressure, flow, temperature signals input by the high-speed pressure transmitter, the throttling device and the temperature sensor and outputting a surge control signal through operation so as to control a gasp-preventing valve to adjust the inspiratory flows of the compressor.
Description
Technical field
the invention belongs to the compressor bank technical field of automatic control, relate in particular to a kind of compressor bank surge control system.
Background technique
In
modern petroleum chemical engineering industry, large-scale compressor equipment is the key equipment that drives the flow process running, is the heart of explained hereafter device.Safety in production is the energy-conservation of maximum, and the optimization control of compressor bank control system reliability, compressor bank controlling schemes, compressor bank body is to device operation and energy-saving and cost-reducing significant.
surge control is the core of turbocompressor group control; Traditional control is adopted single-loop regulator or is integrated in other system and realizes; Adopt simple control strategy; The operation area and the execution speed that have limited unit are slow, have restricted the performance of unit performance and the working life of unit like this, make the long-term operation cost of whole system very high.
Summary of the invention
the present invention is exactly to the problems referred to above, provides a kind of system operation troubles rate and long-term operation cost low compressor bank surge control system.
for realizing above-mentioned purpose, the present invention adopts following technological scheme, the present invention includes controller, high speed pressure transmitter, throttling arrangement, temperature transducer, anti-asthma modulating valve; Its structure outline controller links to each other with high speed pressure transmitter, throttling arrangement, temperature transducer, anti-asthma modulating valve respectively.
said high speed pressure transmitters sense compressor inlet and outlet pressure converts standard analog amount signal to and sends into controller.
said throttling arrangement detects compressor air inlet or goes out throughput and converts standard analog signal to and send into controller.
said temperature transducer detection compressor out temperature converts standard analog amount signal to and sends into controller.
The pressure of
said controller reception high speed pressure transmitter, throttling arrangement, temperature transducer input, flow, temperature signal are controlled the inspiratory flow of anti-asthma valve regulated compressor through computing output surge control signal.
as a kind of preferred version, controller according to the invention adopts triplex level redundancy (TMR) controller (like the T6300 controller).
as another kind of preferred version, surge control signal according to the invention is the current signal of 4-20mA.
as another kind of preferred version, controller according to the invention comprises that operation point y coordinate calculation block, operation point abscissa calculation block, surge line measuring and calculating function block, surge detection module, operation point following function piece, self-adaptive PID (PID) parameter function piece, pid function block, height select selector.
are as another kind of preferred version; Operation point according to the invention y coordinate calculation block obtains absolute pressure ratio (being the operation point y coordinate) through the outlet absolute pressure of compressor bank is carried out computing with the inlet absolute pressure, and surge line measuring and calculating function block is according to absolute pressure ratio calculation pumping point.
are as another kind of preferred version; Operation point according to the invention abscissa calculation block is according to inlet flow rate, the pressure of throttling arrangement, the inlet temperature of compressor, throttling arrangement temperature, throttling arrangement design pressure, the throttling arrangement design temperature of compressor, calculates the operation point abscissa value after the temperature correction.(the operation point abscissa formula after the temperature correction:
* present flow rate)
as another kind of preferred version, surge detection module according to the invention compares operation point and pumping point, judges according to comparative result whether surge takes place and whether report to the police.
as another kind of preferred version, operation point according to the invention following function piece moves too fast setting value, following rate according to operation point, pumping point, operation point, calculates the setting value that output obtains dynamic pid function block.
secondly, self-adaptive PID parameter function piece according to the invention is confirmed dynamic pid parameter according to the spacing range between the setting value of the position of operation point and pid function block.
in addition, pid function block according to the invention is according to the setting value of operation point, dynamic PID function block, adaptive pid parameter, calculates to output to height and select selector to compare, and then the aperture of control anti-asthma modulating valve.
beneficial effect of the present invention: (1) the present invention is high speed pressure transmitter, throttling arrangement, temperature transducer, and the anti-asthma modulating valve combines through controller, has reduced system's operation troubles rate and long-term operation cost.
The high redundancy fault-tolerant control system of
(2) reliability.The present invention adopts triplex level redundancy TMR controller, has improved the reliability of system.
(3) integrated s operation control through controller makes that surge control response speed is fast, the response sensitivity is high.
The current signal that
(4) surge control signal of the present invention is 4-20mA; Laser propagation effect is good.
Description of drawings
further specify the present invention below in conjunction with accompanying drawing and embodiment, and this present invention protection domain not only is confined to the statement of following content.
Fig. 1 is that the present invention controls the function block theory diagram.
Fig. 2 is the present invention's first control subblock circuit theory diagrams.
Fig. 3 is the present invention's second control subblock circuit theory diagrams.
Fig. 4 is the present invention's the 3rd control subblock circuit theory diagrams.
Fig. 5 is the present invention's the 4th control subblock circuit theory diagrams.
Fig. 6 is the present invention's the 5th control subblock circuit theory diagrams.
Fig. 7 is the present invention's the 6th control subblock circuit theory diagrams.
Fig. 8 is the present invention's the 7th control subblock circuit theory diagrams.
Embodiment
are as shown in the figure, the present invention includes controller, high speed pressure transmitter, throttling arrangement, temperature transducer, anti-asthma modulating valve; Controller links to each other with high speed pressure transmitter, throttling arrangement, temperature transducer, anti-asthma modulating valve respectively.
said high speed pressure transmitters sense compressor inlet and outlet pressure converts standard analog amount signal to and sends into controller.
said throttling arrangement detects compressor air inlet or goes out throughput and converts standard analog signal to and send into controller.
said temperature transducer detection compressor out temperature converts standard analog amount signal to and sends into controller.
The pressure of
said controller reception high speed pressure transmitter, throttling arrangement, temperature transducer input, flow, temperature signal are controlled the inspiratory flow of anti-asthma valve regulated compressor through computing output surge control signal.
said controller adopts triplex level redundancy (TMR) controller.
said surge control signal is the current signal of 4-20mA.
The data that
director demon of the present invention is mainly gathered have: the inlet pressure of compressor bank; The outlet pressure of compressor bank; The inlet flow rate of compressor bank (differential pressure); The rate of discharge of compressor bank (differential pressure), the inlet temperature of compressor bank, the outlet temperature of compressor bank etc.The data of gathering all will be connected on the anti-asthma control function block pin of controller carries out anti-asthma control computing.
As shown in Figure 1, the outlet pressure of compressor bank and inlet pressure be input to the computing of HpSim function block (operational formula:
) obtaining absolute pressure ratio, among the value that the obtains input surge line measuring and calculating function block Table5, the effect of this function block is to be depicted as a broken line under the X-Y system of coordinates according to the pumping point that compressor producer provides, and exports pumping point SLL according to absolute pressure than calculating.
operation point abscissa calculation block OPcal, this function block is according to the inlet flow rate Flow of compressor, inlet pressure Ps; The pressure P fo of throttling arrangement, inlet temperature Ts, throttling arrangement temperature T fo; The design entry pressure P bc of compressor, compressor design inlet temperature Tbc, throttling arrangement design pressure Pbc; Throttling arrangement design temperature Tbo calculates the real work point abscissa value OP behind the output temperature pressure compensation.
<b > surge detection module Margin, this function block realizes the calculating of surge alarm, surge counting, anti-surge line SCL, operation point OP and pumping point SLL compare in this algorithm, if OP< SLL explains that surge has taken place unit, and surge alarm enables; Surge counting adds one, and the anti-surge line will move down preset nargin (for example 1%), a surge of every generation; The anti-surge line will move down preset nargin (for example 1%); After enabling the surge count resets, the zero clearing of surge counting, the anti-surge line resets to initial position.</b>
operation point following function piece OPtrack; This function block moves too fast setting TM according to operation point OP, anti-surge point SCL, operation point; TM is set in that 5%-10% (flow per second percentage) is configurable, (Ti output is the increase and decrease speed that dynamic SP per second is followed the tracks of OP to following rate Ti; This parameter can be according to the actual conditions configuration), calculate (motionless or move right as operation point OP, differ 5% tracking behind following rate Ti and the operation point OP; OP is moved to the left when the operation point, and following rate Ti follows the tracks of with 1%) output obtains the setting value of dynamic SP (SP is the setting value of pid function block) as the PID input.In fact, when operation point OP surpasses TM to the speed of surge guide line motion, prove the operation point move too fast, this situation often flow sharply decline caused, will open the generation that some anti-asthma valves prevent surge.
self-adaptive PID parameter function piece Adapt; This function block realizes dynamic pid parameter according to the spacing range between OP position, operation point and the setting value SP; This parameter will be confirmed a desirable dynamic range according to the on-site actual situations test; Dynamic pid parameter has solved an Important Thought of Anti-surge Control, that be exactly the anti-asthma valve change down the pass soon.
function block TMCPID, this function block is according to operation point OP, dynamic SP set point, adaptive pid parameter calculates and outputs to height and select selector to compare, and then the aperture of control anti-asthma modulating valve.Whether whether normal the mistake worked to judge unit according to the relation between OP and the SP, need anti-surge to regulate.As SP during less than OP, unit is operated in the safety zone, and the throttle down that PID output will be is slowly closed the process that Here it is closes slowly fully up to valve.As SP during greater than OP, unit is operated in non-safety zone, and PID output can be opened valve fast, prevents the generation of surge, the process that Here it is opens soon.
are control manually, realizes the manual control of anti-asthma valve through two digital quantities inputs (manually open and manually close), and switching rate is regulated by configuration value in advance.It is adjustable at per second 10%-100% (valve opening percentage) to open speed, and pass speed is adjustable at per second 5%-20%.
height selects selector, PID output and manual control output is compared get high value and output to valve, assurance valve open operator precedence.
are with being appreciated that; More than about specific descriptions of the present invention; Only be used to the present invention is described and be not to be subject to the described technological scheme of the embodiment of the invention; Those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention, to reach identical technique effect; As long as satisfy the use needs, all within protection scope of the present invention.
Claims (10)
1. compressor bank surge control system comprises controller, high speed pressure transmitter, throttling arrangement, temperature transducer, anti-asthma modulating valve; It is characterized in that controller links to each other with high speed pressure transmitter, throttling arrangement, temperature transducer, anti-asthma modulating valve respectively;
Said high speed pressure transmitters sense compressor inlet and outlet pressure converts standard analog amount signal to and sends into controller;
Said throttling arrangement detects the compressor air inlet or goes out throughput and converts standard analog signal to and send into controller;
Said temperature transducer detection compressor out temperature converts standard analog amount signal to and sends into controller;
The pressure of said controller reception high speed pressure transmitter, throttling arrangement, temperature transducer input, flow, temperature signal are controlled the inspiratory flow of anti-asthma valve regulated compressor through computing output surge control signal.
2. according to the said compressor bank surge of claim 1 control system, it is characterized in that said controller adopts the triplex level redundancy controller.
3. according to the said compressor bank surge of claim 1 control system, it is characterized in that said surge control signal is the current signal of 4-20mA.
4. according to the said compressor bank surge of claim 1 control system, it is characterized in that said controller comprises that operation point y coordinate calculation block, operation point abscissa calculation block, surge line measuring and calculating function block, surge detection module, operation point following function piece, self-adaptive PID parameter function piece, pid function block, height select selector.
5. according to the said compressor bank surge of claim 4 control system; It is characterized in that said operation point y coordinate calculation block obtains absolute pressure ratio through the outlet absolute pressure of compressor bank is carried out computing with the inlet absolute pressure, surge line measuring and calculating function block is according to absolute pressure ratio calculation pumping point.
6. according to the said compressor bank surge of claim 4 control system; It is characterized in that inlet flow rate, the pressure of throttling arrangement, the inlet temperature of compressor, throttling arrangement temperature, throttling arrangement design pressure, the throttling arrangement design temperature of said operation point abscissa calculation block, calculate the operation point abscissa value after the temperature correction according to compressor.
7. according to the said compressor bank surge of claim 4 control system, it is characterized in that said surge detection module compares operation point and pumping point, judge according to comparative result whether surge takes place and whether report to the police.
8. according to the said compressor bank surge of claim 4 control system, it is characterized in that said operation point following function piece moves too fast setting value, following rate according to operation point, pumping point, operation point, calculate the setting value that output obtains dynamic pid function block.
9. according to the said compressor bank surge of claim 4 control system, it is characterized in that said self-adaptive PID parameter function piece confirms dynamic pid parameter according to the spacing range between the setting value of the position of operation point and pid function block.
10. according to the said compressor bank surge of claim 4 control system; It is characterized in that said pid function block is according to the setting value of operation point, dynamic PID function block, adaptive pid parameter; Calculating outputs to height and selects selector to compare, and then the aperture of control anti-asthma modulating valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110155747.0A CN102392812B (en) | 2011-06-10 | 2011-06-10 | Surge control system of compressor unit |
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|---|---|---|---|
| CN201110155747.0A CN102392812B (en) | 2011-06-10 | 2011-06-10 | Surge control system of compressor unit |
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| CN102392812A true CN102392812A (en) | 2012-03-28 |
| CN102392812B CN102392812B (en) | 2015-09-30 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619774A (en) * | 2012-04-19 | 2012-08-01 | 江苏乘帆压缩机有限公司 | Surge control method of centrifugal compression equipment |
| CN102788004A (en) * | 2012-07-30 | 2012-11-21 | 宝山钢铁股份有限公司 | Anti-surge early warning control method of COREX gas compressor |
| CN104061144A (en) * | 2013-03-21 | 2014-09-24 | 北京康吉森自动化设备技术有限责任公司 | Comprehensive compressor set controlling system and anti-surging controlling method thereof |
| CN106062375A (en) * | 2014-03-11 | 2016-10-26 | 博格华纳公司 | Method for identifying the surge limit of a compressor |
| CN108131319A (en) * | 2017-12-21 | 2018-06-08 | 沈阳鼓风机集团自动控制系统工程有限公司 | Surge detection method and device |
| US10060428B2 (en) | 2012-11-07 | 2018-08-28 | Nuovo Pignone Srl | Method for operating a compressor in case of failure of one or more measured signals |
| CN110617233A (en) * | 2018-06-19 | 2019-12-27 | 中国石油集团西部管道有限责任公司 | Load distribution control system of natural gas long-distance pipeline compressor unit |
| CN111059074A (en) * | 2019-12-25 | 2020-04-24 | 浙江中控技术股份有限公司 | Method, device and system for determining running state of compressor |
| CN111120387A (en) * | 2020-01-03 | 2020-05-08 | 北京航空航天大学 | Self-adaptive control method for stability of air compressor |
| CN111322265A (en) * | 2020-04-27 | 2020-06-23 | 乔治洛德方法研究和开发液化空气有限公司 | Anti-surge system of centrifugal compressor and control method |
| US10989211B2 (en) | 2013-03-26 | 2021-04-27 | Nuovo Pignone Srl | Methods and systems for antisurge control of turbo compressors with side stream |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619774A (en) * | 2012-04-19 | 2012-08-01 | 江苏乘帆压缩机有限公司 | Surge control method of centrifugal compression equipment |
| CN102619774B (en) * | 2012-04-19 | 2015-05-20 | 江苏乘帆压缩机有限公司 | Surge control method of centrifugal compression equipment |
| CN102788004A (en) * | 2012-07-30 | 2012-11-21 | 宝山钢铁股份有限公司 | Anti-surge early warning control method of COREX gas compressor |
| CN102788004B (en) * | 2012-07-30 | 2015-01-21 | 宝山钢铁股份有限公司 | Anti-surge early warning control method of COREX gas compressor |
| US10060428B2 (en) | 2012-11-07 | 2018-08-28 | Nuovo Pignone Srl | Method for operating a compressor in case of failure of one or more measured signals |
| CN104061144A (en) * | 2013-03-21 | 2014-09-24 | 北京康吉森自动化设备技术有限责任公司 | Comprehensive compressor set controlling system and anti-surging controlling method thereof |
| US10989211B2 (en) | 2013-03-26 | 2021-04-27 | Nuovo Pignone Srl | Methods and systems for antisurge control of turbo compressors with side stream |
| CN106062375A (en) * | 2014-03-11 | 2016-10-26 | 博格华纳公司 | Method for identifying the surge limit of a compressor |
| CN108131319B (en) * | 2017-12-21 | 2019-09-20 | 沈阳鼓风机集团自动控制系统工程有限公司 | Surge detection method and device |
| CN108131319A (en) * | 2017-12-21 | 2018-06-08 | 沈阳鼓风机集团自动控制系统工程有限公司 | Surge detection method and device |
| CN110617233A (en) * | 2018-06-19 | 2019-12-27 | 中国石油集团西部管道有限责任公司 | Load distribution control system of natural gas long-distance pipeline compressor unit |
| CN110617233B (en) * | 2018-06-19 | 2021-03-30 | 中国石油集团西部管道有限责任公司 | Load distribution control system of natural gas long-distance pipeline compressor unit |
| CN111059074A (en) * | 2019-12-25 | 2020-04-24 | 浙江中控技术股份有限公司 | Method, device and system for determining running state of compressor |
| CN111120387A (en) * | 2020-01-03 | 2020-05-08 | 北京航空航天大学 | Self-adaptive control method for stability of air compressor |
| CN111120387B (en) * | 2020-01-03 | 2020-11-13 | 北京航空航天大学 | Self-adaptive control system and control method for stability of compressor system |
| CN111322265A (en) * | 2020-04-27 | 2020-06-23 | 乔治洛德方法研究和开发液化空气有限公司 | Anti-surge system of centrifugal compressor and control method |
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| CN102392812B (en) | 2015-09-30 |
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