CN105589481B - Intelligent sliding pressure control method and system - Google Patents
Intelligent sliding pressure control method and system Download PDFInfo
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- CN105589481B CN105589481B CN201510148371.9A CN201510148371A CN105589481B CN 105589481 B CN105589481 B CN 105589481B CN 201510148371 A CN201510148371 A CN 201510148371A CN 105589481 B CN105589481 B CN 105589481B
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Abstract
This application provides a kind of intelligent sliding pressure control method, when the target load of unit changes, by the change delay predetermined time of pressure；Then the size of first pressure setting value and second pressure setting value is compared, when the difference of the first pressure setting value and the second pressure setting value meets the first preset difference value, compare the size of main vapour pressure and the second pressure setting value, when the difference of the main vapour pressure and the second pressure setting value meets the second preset difference value, the corresponding sliding pressure step sequence of automated execution, after intelligent sliding pressure, compared with the prior art, reduce the prison disk of operations staff and the intensity of operation intervention, operations staff is made to be freed from busy operation, and for keeping the equipment general level of the health, extend unit durability and optimal operating condition is kept to have apparent effect, so as to effectively carry out the main Steam Pressure Control of Circulated during lifting load, ensure unit safety, stable operation, improve the economic benefit of unit operation.
Description
Technical field
This application involves monoblock Coordinated Control, more particularly to a kind of intelligent sliding pressure control method and system.
Background technology
With the development of technology, people to the main Steam Pressure Control of Circulated quality requirements in monoblock Coordinated Control increasingly
It is high.
In existing unit coordinatedcontrol system, under Directed Energy Balance Coordinated Control control strategy, two unit frequencies
Numerous participation peak load regulation network, in unit lifting load, main steam pressure force parameter is exceeded, and control deviation reaches ± 1.1MPa, operation
Personnel operate the economy and security intervened and frequently, influence unit operation.
Therefore, the main Steam Pressure Control of Circulated during lifting load how is effectively carried out, ensures unit safety, stable operation,
The economic benefit for improving unit operation is the current technical issues that need to address of those skilled in the art.
The content of the invention
Technical problems to be solved in this application are to provide a kind of intelligent sliding pressure control method and system, solve existing skill
In art under Directed Energy Balance Coordinated Control control strategy, two units frequently participate in peak load regulation network, main in unit lifting load
Steam pressure parameter is exceeded, and control deviation reaches ± 1.1MPa, and operations staff operates the economy intervened and frequently, influence unit operation
The problem of property and security.
Its concrete scheme is as follows：
A kind of intelligence sliding pressure control method, this method include：
When the target load of unit changes, by the change delay predetermined time of pressure；
Compare the size of first pressure setting value and second pressure setting value, when the first pressure setting value and described the
When the difference of two pressure set points meets the first preset difference value, the size of more main vapour pressure and the second pressure setting value, when
When the difference of the main vapour pressure and the second pressure setting value meets the second preset difference value, the corresponding sliding pressure step of automated execution
Sequence.
Above-mentioned method, it is preferred that it is described when the target load of unit changes, by the pre- timing of change delay of pressure
Between, including：
Judge the change direction of the target load of the unit；
When target load increase, the variation of pressure was delayed for the first predetermined time；
When target load is reduced, the variation of pressure was delayed for the second predetermined time.
Above-mentioned method, it is preferred that when target load increase, the change of pressure is delayed 10 seconds；
Compare the difference of first pressure setting value and second pressure setting value, when the first pressure setting value is higher than described
During second pressure setting value 0.01, the difference of more main vapour pressure and the second pressure setting value, when the main vapour pressure is higher than institute
When stating second pressure setting value -0.2, automated execution automatic boosting step sequence.
Above-mentioned method, it is preferred that when target load is reduced, the change of pressure is delayed 10 seconds；
Compare the difference of first pressure setting value and second pressure setting value, when the first pressure setting value is less than described
During second pressure setting value 0.01, the difference of more main vapour pressure and the second pressure setting value, when the main vapour pressure is less than institute
When stating second pressure setting value -0.2, automated execution is depressured step sequence automatically.
Above-mentioned method, it is preferred that further include：
When the main vapour pressure, which meets, coordinates control preset range, the size of more main vapour pressure and pressure set points works as institute
When stating the absolute differences of main vapour pressure and the pressure set points and meeting preset value, transformation rate is set to slow down rate；
When the absolute difference of the main vapour pressure and the pressure set points is unsatisfactory for preset value, setting transformation rate is
Scheduled rate.
Above-mentioned method, it is preferred that further include：
When the main vapour pressure, which meets, coordinates control preset range, the change direction of main vapour pressure is judged；
When the main vapour pressure is in boosting trend, it is scheduled rate to set transformation rate, when the main vapour pressure is in drop
During pressure trend, transformation rate is set to slow down rate.
Above-mentioned method, it is preferred that further include：
When the main vapour pressure, which meets, coordinates control preset range, the target load for detecting unit changes direction；
When detecting that unit target load changes direction, transformation rate is put as 0.0001.
A kind of intelligence sliding pressure control system, the system include：
Delay unit, for when the target load of unit changes, by the change delay predetermined time of pressure；
First comparing unit, for comparing the size of first pressure setting value and second pressure setting value；
Second comparing unit meets for working as the difference of the first pressure setting value and the second pressure setting value
During one preset difference value, the size of more main vapour pressure and the second pressure setting value, when the main vapour pressure and the second pressure
When the difference of setting value meets the second preset difference value, corresponding sliding pressure step sequence is performed.
Above-mentioned system, it is preferred that further include：
3rd comparing unit, for when the main vapour pressure meet coordinate control preset range when, more main vapour pressure and pressure
The size of setting value；
First setting unit, the absolute difference for working as the main vapour pressure and the pressure set points meet preset value
When, transformation rate is set to slow down rate；
Second setting unit, the absolute difference for working as the main vapour pressure and the pressure set points are unsatisfactory for preset value
When, it is scheduled rate to set transformation rate.
Above-mentioned system, it is preferred that further include：
Judging unit, for when the main vapour pressure meets coordination control preset range, judging the change direction of main vapour pressure；
3rd setting unit, for when the main vapour pressure is boosted, it to be scheduled rate to set transformation rate；
4th setting unit, for when the main vapour pressure is depressured, setting transformation rate to slow down rate.
In a kind of intelligent sliding pressure control method that the application provides, when the target load of unit changes, by changing for pressure
Become delay predetermined time；Then the size of first pressure setting value and second pressure setting value is compared, when the first pressure is set
When the difference of definite value and the second pressure setting value meets the first preset difference value, more main vapour pressure is set with the second pressure
The size of value, when the difference of the main vapour pressure and the second pressure setting value meets the second preset difference value, automated execution phase
The sliding pressure step sequence answered after intelligent sliding pressure, compared with the prior art, reduces the prison disk of operations staff and operates the strong of intervention
Degree, makes operations staff be freed from busy operation, and for keeping the equipment general level of the health, extending unit durability and guarantor
Holding optimal operating condition has apparent effect, so as to effectively carry out the main Steam Pressure Control of Circulated during lifting load, ensures
Unit safety, stable operation improve the economic benefit of unit operation.
Description of the drawings
In order to illustrate more clearly of the technical solution in the embodiment of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present application, for
For those of ordinary skill in the art, without having to pay creative labor, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 is a kind of flow chart of intelligent sliding pressure control embodiment of the method for the application；
Fig. 2 is a kind of logical schematic of intelligent sliding pressure control of the application；
Fig. 3 is a kind of transformation rate control logic schematic diagram of intelligent sliding pressure control of the application；
Fig. 4 is a kind of structure diagram of intelligent sliding pressure control system of the application；
Fig. 5 be the application a kind of intelligent sliding pressure control system in transformation speed control structure diagram.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, the technical solution in the embodiment of the present application is carried out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall in the protection scope of this application.
With reference to figure 1, show a kind of flow chart of intelligent sliding pressure control embodiment of the method for the application, following step can be included
Suddenly：
Step S101：When the target load of unit changes, by the change delay predetermined time of pressure.
In the application, the meaning of intelligent sliding pressure control strategy is：It is sliding when actual pressure is less than setting pressure during load up
Pressure is automatic to be waited, when actual pressure is higher than setting pressure, automatic quick sliding pressure；During load down, intelligent sliding pressure control action circuit
It is logical opposite with load up；The artificial sliding pressure of sliding pressure control process simulation during lifting load.
In the application when the target load for detecting unit changes, by the change delay 10s of pressure, but it is not limited to
10s, the predetermined time of delay is related with the characteristic of boiler heat storage, depends on the circumstances.
Step S102：Compare the size of first pressure setting value and second pressure setting value.
In the application, first pressure setting value is the rate value put before standard speed block, i.e. value before rate, second pressure
Setting value is the rate value put after standard speed block, i.e. value after rate.
Step S103：When the difference of the first pressure setting value and second pressure setting value satisfaction first is default poor
During value, the size of more main vapour pressure and the second pressure setting value.
When the difference of first pressure setting value and second pressure setting value the first preset difference value of satisfaction namely when the first pressure
When power setting value is more than second pressure setting value 0.01, the size of more main vapour pressure and second pressure setting value.
Note first pressure setting value and the difference of second pressure setting value are not limited to 0.01, depend on the circumstances.
Step S104：When the difference of the main vapour pressure and the second pressure setting value meets the second preset difference value, from
It is dynamic to perform corresponding sliding pressure step sequence.
In the application, using second pressure setting value as object procedure value, more main vapour pressure and second pressure setting value
Difference, when main vapour pressure is less than second pressure setting value -0.2, the corresponding sliding pressure step sequence of automated execution.
The difference for noting main vapour pressure and second pressure setting value is not limited to -0.2, depends on the circumstances.
In a kind of intelligent sliding pressure control method that the application provides, when the target load of unit changes, by changing for pressure
Become delay predetermined time；Then the size of first pressure setting value and second pressure setting value is compared, when the first pressure is set
When the difference of definite value and the second pressure setting value meets the first preset difference value, more main vapour pressure is set with the second pressure
The size of value, when the difference of the main vapour pressure and the second pressure setting value meets the second preset difference value, automated execution phase
The sliding pressure step sequence answered after intelligent sliding pressure, compared with the prior art, reduces the prison disk of operations staff and operates the strong of intervention
Degree, makes operations staff be freed from busy operation, and for keeping the equipment general level of the health, extending unit durability and guarantor
Holding optimal operating condition has apparent effect, so as to effectively carry out the main Steam Pressure Control of Circulated during lifting load, ensures
Unit safety, stable operation improve the economic benefit of unit operation.
In the application, when the target load when unit changes, by the change delay predetermined time of pressure, including：
Judge the change direction of the target load of the unit；
When target load increase, the variation of pressure was delayed for the first predetermined time.
When target load is reduced, the variation of pressure was delayed for the second predetermined time.
In the application, as shown in Fig. 2, show the logical schematic of intelligent sliding pressure control, it, will when target load increase
The change of pressure is delayed 10 seconds.
Compare the difference of first pressure setting value and second pressure setting value, when the first pressure setting value is higher than described
During second pressure setting value 0.01, the difference of more main vapour pressure and the second pressure setting value, when the main vapour pressure is higher than institute
When stating second pressure setting value -0.2, automated execution automatic boosting step sequence.
When target load is reduced, the change of pressure is delayed 10 seconds.
Compare the difference of first pressure setting value and second pressure setting value, when the first pressure setting value is less than described
During second pressure setting value 0.01, the difference of more main vapour pressure and the second pressure setting value, when the main vapour pressure is less than institute
When stating second pressure setting value -0.2, automated execution is depressured step sequence automatically.
In the application, as shown in figure 3, showing the transformation rate control logic schematic diagram of intelligent sliding pressure control, further include
The process of transformation speed control：
Under automatic boosting trigger condition, when the main vapour pressure, which meets, coordinates control preset range, more main vapour pressure with
The size of pressure set points when the absolute difference of the main vapour pressure and the pressure set points meets preset value, sets and becomes
Pressure rate is to slow down rate.
When the absolute difference of the main vapour pressure and the pressure set points is unsatisfactory for preset value, setting transformation rate is
Scheduled rate.
In the application, when the absolute value of main vapour pressure and the difference of pressure set points is 0.01, main vapour pressure almost meets pressure
The demand of power setting value need not carry out boost operations again, at this point, it is 0.0001 to set transformation rate；When main vapour pressure and pressure
When the absolute value of the difference of setting value is unsatisfactory for 0.01, illustrate that main vapour pressure reaches the demand of pressure set points not yet, it is also necessary to
Continue boost operations, at this point, it is scheduled rate to set transformation rate, the scheduled rate is sliding pressure speed when boosting
Rate.
Under automatic boosting trigger condition, when the main vapour pressure, which meets, coordinates control preset range, main vapour pressure is judged
Change direction.
When the main vapour pressure boosting, it is scheduled rate to set transformation rate, when the main vapour pressure decompression, sets transformation
Rate is to slow down rate.
In the application, by comparing main vapour pressure of the current main vapour pressure when lagging one or two cycle compared with, when
When current main vapour pressure is less than the main vapour pressure more than hysteresis, illustrate main vapour pressure in boost phase, it is default to set transformation rate at this time
Rate；When current main vapour pressure is more than the main vapour pressure less than hysteresis, illustrate that main vapour pressure in buck stage, sets transformation rate at this time
To slow down rate.
Under automatic boosting trigger condition, when the main vapour pressure, which meets, coordinates control preset range, the mesh of unit is detected
Mark changing load direction.
When detecting that unit target load changes direction, it is 0.0001 that hair pulse, which sets transformation rate,.
Under the triggering of automatic boosting condition, when the target load for detecting unit changes direction, i.e., target load is reduced
When, it is 0.0001 that hair pulse, which sets transformation rate,.
In the application, further include：
Under decompression trigger condition automatically, when the main vapour pressure, which meets, coordinates control preset range, more main vapour pressure with
The size of pressure set points when the absolute difference of the main vapour pressure and the pressure set points meets preset value, sets and becomes
Pressure rate is to slow down rate.
When the absolute difference of the main vapour pressure and the pressure set points is unsatisfactory for preset value, setting transformation rate is
Scheduled rate.
In the application, when the absolute value of main vapour pressure and the difference of pressure set points is 0.01, main vapour pressure almost meets pressure
The demand of power setting value need not carry out boost operations again, at this point, it is 0.0001 to set transformation rate；When main vapour pressure and pressure
When the absolute value of the difference of setting value is unsatisfactory for 0.01, illustrate that main vapour pressure reaches the demand of pressure set points not yet, it is also necessary to
Continue boost operations, at this point, it is scheduled rate to set transformation rate, the scheduled rate is sliding pressure speed when boosting
Rate.
Under decompression trigger condition automatically, when the main vapour pressure, which meets, coordinates control preset range, main vapour pressure is judged
Change direction.
When the main vapour pressure boosting, it is scheduled rate to set transformation rate, when the main vapour pressure decompression, sets transformation
Rate is to slow down rate.
In the application, by comparing main vapour pressure of the current main vapour pressure when lagging one or two cycle compared with, when
When current main vapour pressure is less than the main vapour pressure of hysteresis, illustrate that main vapour pressure in boost phase, sets transformation rate to slow down rate at this time；
When current main vapour pressure is more than the main vapour pressure of hysteresis, illustrate that main vapour pressure in buck stage, sets transformation rate as default speed at this time
Rate.
Under decompression trigger condition automatically, when the main vapour pressure, which meets, coordinates control preset range, the mesh of unit is detected
Mark changing load direction.
When detecting that unit target load changes direction, it is 0.0001 to set transformation rate.
Under the triggering of automatic pressure-lowering condition, when the target load for detecting unit changes direction, i.e., target load increases
When, it is 0.0001 to set transformation rate.
It is corresponding with the method that a kind of intelligent sliding pressure control embodiment of the method for above-mentioned the application is provided, referring to Fig. 4, this Shen
A kind of intelligent sliding pressure control system embodiment please be additionally provide, in the present embodiment, which includes：
Delay unit 401, for when the target load of unit changes, by the change delay predetermined time of pressure.
First comparing unit 402, for comparing the size of first pressure setting value and second pressure setting value.
Second comparing unit 403, the difference for working as the first pressure setting value and the second pressure setting value expire
During the first preset difference value of foot, the size of more main vapour pressure and the second pressure setting value, when the main vapour pressure and described second
When the difference of pressure set points meets the second preset difference value, corresponding sliding pressure step sequence is performed.
With reference to figure 5, transformation speed control structure diagram in a kind of intelligent sliding pressure control system of the application, bag are shown
It includes：
3rd relatively single 501, for when the main vapour pressure meet coordinate control preset range when, more main vapour pressure and pressure
The size of setting value.
First setting unit 502, the absolute difference for working as the main vapour pressure and the pressure set points meet default
During value, transformation rate is set to slow down rate.
Second setting unit 503, the absolute difference for working as the main vapour pressure and the pressure set points are unsatisfactory for pre-
If during value, it is scheduled rate to set transformation rate.
In the application, further include：
Judging unit, for when the main vapour pressure meets coordination control preset range, judging the change direction of main vapour pressure.
3rd setting unit is scheduled rate for when the main vapour pressure is in boosting trend, setting transformation rate.
4th setting unit, for when the main vapour pressure is in decompression trend, transformation rate to be to slow down rate.
In conclusion a kind of intelligent sliding pressure control method and system provided herein, can effectively be lifted
Main Steam Pressure Control of Circulated in load process ensures unit safety, stable operation, improves the economic benefit of unit operation.
It should be noted that each embodiment in this specification is described by the way of progressive, each embodiment weight
Point explanation is all difference from other examples, and just to refer each other for identical similar part between each embodiment.
For device class embodiment, since it is basicly similar to embodiment of the method, so description is fairly simple, related part ginseng
See the part explanation of embodiment of the method.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only include that
A little elements, but also including other elements that are not explicitly listed or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except also there are other identical elements in the process, method, article or apparatus that includes the element.
For convenience of description, it is divided into various units during description apparatus above with function to describe respectively.Certainly, this is being implemented
The function of each unit is realized can in the same or multiple software and or hardware during application.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can
It is realized by the mode of software plus required general hardware platform.Based on such understanding, the technical solution essence of the application
On the part that the prior art contributes can be embodied in the form of software product in other words, the computer software product
It can be stored in storage medium, such as ROM/RAM, magnetic disc, CD, it is used including some instructions so that a computer equipment
(can be personal computer, server either network equipment etc.) performs some of each embodiment of the application or embodiment
Method described in part.
A kind of intelligent sliding pressure control method and system provided herein are described in detail above, herein should
With specific case, the principle and implementation of this application are described, and the explanation of above example is only intended to help to manage
Solve the present processes and its core concept；Meanwhile for those of ordinary skill in the art, according to the thought of the application,
There will be changes in specific embodiment and application range, in conclusion this specification content should not be construed as to this Shen
Limitation please.
Claims (5)
- A kind of 1. intelligence sliding pressure control method, which is characterized in that this method includes：When target load increase, the change of pressure is delayed 10 seconds；The rate value put before standard of comparison rate block and the difference for the rate value put after standard speed block, when the standard speed block When the rate value of preceding point is higher than the rate value 0.01 put after the standard speed block, after more main vapour pressure and the standard speed block The difference of the rate value of point, when the main vapour pressure is higher than the rate value -0.2 put after the standard speed block, automated execution is certainly Dynamic boosting step sequence；When target load is reduced, the change of pressure is delayed 10 seconds；The rate value put before standard of comparison rate block and the difference for the rate value put after standard speed block, when the standard speed block When the rate value of preceding point is less than the rate value 0.01 put after the standard speed block, after more main vapour pressure and the standard speed block The difference of the rate value of point, when the main vapour pressure is less than the rate value -0.2 put after the standard speed block, automated execution is certainly Dynamic decompression step sequence.
- 2. it according to the method described in claim 1, it is characterized in that, further includes：When the main vapour pressure, which meets, coordinates control preset range, the change direction of main vapour pressure is judged；When the main vapour pressure is in boosting trend, it is scheduled rate to set transformation rate, is become when the main vapour pressure is in decompression During gesture, transformation rate is set to slow down rate.
- 3. it according to the method described in claim 1, it is characterized in that, further includes：When the main vapour pressure, which meets, coordinates control preset range, the target load for detecting unit changes direction；When detecting that unit target load changes direction, it is 0.0001 to set transformation rate.
- 4. a kind of intelligence sliding pressure control system, which is characterized in that the system includes：Delay unit, for when target load increase, the change of pressure to be delayed 10 seconds；It is additionally operable to reduce when target load When, the change of pressure is delayed 10 seconds；First comparing unit, for rate value and the difference for the rate value put after standard speed block put before standard of comparison rate block Value, when the rate value put before the standard speed block is higher than the rate value 0.01 put after the standard speed block, more main vapour Pressure and the difference for the rate value put after the standard speed block, the rate put after the main vapour pressure is higher than the standard speed block During value -0.2, automated execution automatic boosting step sequence；Second comparing unit, for rate value and the difference for the rate value put after standard speed block put before standard of comparison rate block Value, when the rate value put before the standard speed block is less than the rate value 0.01 put after the standard speed block, more main vapour Pressure and the difference for the rate value put after the standard speed block, the rate put after the main vapour pressure is less than the standard speed block During value -0.2, automated execution is depressured step sequence automatically.
- 5. system according to claim 4, which is characterized in that further include：Judging unit, for when the main vapour pressure meets coordination control preset range, judging the change direction of main vapour pressure；3rd setting unit, for when the main vapour pressure is boosted, it to be scheduled rate to set transformation rate；4th setting unit, for when the main vapour pressure is depressured, setting transformation rate to slow down rate.
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| CN106200704B (en) * | 2016-08-31 | 2019-05-21 | 广东电网有限责任公司电力科学研究院 | A kind of RB process main vapour pressure setting value operation method and system |
| CN111794812B (en) * | 2020-06-30 | 2022-06-14 | 中国神华能源股份有限公司国华电力分公司 | Method and device for controlling sliding pressure operation of steam turbine unit and electronic equipment |
| CN112947609B (en) * | 2021-01-27 | 2022-07-26 | 山东中实易通集团有限公司 | Main steam pressure setting control strategy and system for sliding pressure operation unit |
| CN114153239B (en) * | 2021-11-15 | 2023-09-15 | 国网山东省电力公司电力科学研究院 | RB sliding pressure instruction adjusting method and device based on unit load and computer equipment |
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| FR2738613B1 (en) * | 1995-09-08 | 1997-10-24 | Thomson Csf | METHOD FOR CONTROLLING A HYDRAULIC SERVOVALVE THAT CAN BE SERVED BY FLOW AND PRESSURE |
| CN101864994B (en) * | 2009-11-16 | 2013-01-09 | 浙江省电力试验研究院 | Correction method for optimization of sliding pressure of large steam turbine |
| CN202048339U (en) * | 2011-04-21 | 2011-11-23 | 宝山钢铁股份有限公司 | Automatic lubricating pressure control device |
| CN102278150B (en) * | 2011-05-05 | 2014-02-12 | 山东电力研究院 | Optimal control method for pressure constant value of sliding pressure operation unit under AGC (automatic gain control) mode |
| CN102606227B (en) * | 2012-03-26 | 2014-10-01 | 上海迪吉特控制***有限公司 | Multi-objective optimization method of initial pressure fixed value of uniform-admission turbine |
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