CN106200704A - A kind of RB process main vapour pressure setting value operation method and system - Google Patents
A kind of RB process main vapour pressure setting value operation method and system Download PDFInfo
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- CN106200704A CN106200704A CN201610794080.1A CN201610794080A CN106200704A CN 106200704 A CN106200704 A CN 106200704A CN 201610794080 A CN201610794080 A CN 201610794080A CN 106200704 A CN106200704 A CN 106200704A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
- G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
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Abstract
The embodiment of the invention discloses a kind of RB process main vapour pressure setting value operation method and system, finally determining suitable main vapour pressure setting value by the main vapour pressure desired value calculating different RB types or RB target load, the RB process in prior art that solves uses the technical problem being unfavorable for unit safety, stable operation caused with the properly functioning identical main vapour pressure setting value operational loop of unit.
Description
Technical field
The present invention relates to fired power generating unit automation field, particularly relate to a kind of RB process main vapour pressure setting value computing side
Method and system.
Background technology
For reducing the fossil power plant auxiliary engine fault trip risk to fired power generating unit safe operation, current fired power generating unit is equipped with
Auxiliary machinery fault automatic load-reducing function, i.e. RUN BACK function, is called for short RB.When the employing such as blower fan, feed pump 2 or multiple stage are arranged side by side
Run subsidiary engine in one or more tripping operation time, except need to be controlled mode switch, quickly reduce unit target load, unit
The working medium flows such as fuel, feedwater, air quantity, also need to carry out unit main steam pressure conservative control, so that boiler feedwater, main steam
The unit parameter transition such as temperature are the most stable.
At present, major part fired power generating unit RB process carries out the constant DP control side of conservative control employing to unit main steam pressure
Method, i.e. uses and the properly functioning identical main vapour pressure setting value operational loop of unit.
But existing technology has certain defect, because main vapour pressure fall is big during unit RB, main vapour pressure
Power, unit load are long for fall time, and main steam temperature and reheat steam temperature decline too much, normally transport with unit if used
The main vapour pressure setting value operational loop that row is identical, is unfavorable for unit safety, stable operation.
Summary of the invention
Embodiments provide a kind of RB process main vapour pressure setting value operation method and system, by calculating difference
RB type or the main vapour pressure desired value of RB target load finally determine suitable main vapour pressure setting value, solve existing
In technology, RB process uses that causes with the properly functioning identical main vapour pressure setting value operational loop of unit to be unfavorable for that unit is pacified
Entirely, the technical problem of stable operation.
Embodiments provide a kind of RB process main vapour pressure setting value operation method, it is characterised in that including:
RB pressure target value is calculated according to the described RB type obtained in advance or described RB target load；
Monitoring main vapour pressure value in real time；
According to the described RB actuating signal detected in advance and the main vapour pressure initial set value of described former control system, calculating
Described RB pressure target value, the described main vapour pressure value of monitoring judges, if described RB pressure target value is less than described master
During vapour pressure force value, main vapour pressure value described in main vapour pressure setting value tracking, if described RB pressure target value is higher than described main vapour pressure
In the presence of force value and described RB actuating signal, described main vapour pressure setting value remains described RB pressure target value, if described RB
Actuating signal not in the presence of, described main vapour pressure setting value switches to the described main vapour pressure initial set value of former control system.
Alternatively,
Also wrapped before calculating RB pressure target value according to the described RB type detected in advance or described RB target load
Include:
Obtain RB type or RB target load and detect RB actuating signal, the main vapour pressure of former control system initially sets
Value.
Alternatively,
Calculate RB pressure target value according to the described RB type detected in advance or described RB target load to specifically include:
According to the described RB type detected in advance, obtain RB pressure target value by switching mode；
According to the described RB target load detected in advance, carry out functional operation and obtain RB pressure target value.
Alternatively,
Also wrapped before calculating RB pressure target value according to the described RB type detected in advance or described RB target load
Include:
Detection unit load.
Alternatively,
According to the described RB actuating signal detected in advance and the main vapour pressure initial set value of described former control system, meter
Described RB pressure target value, the described main vapour pressure value of monitoring calculated judge, if described RB pressure target value is less than described
During main vapour pressure value, main vapour pressure value described in main vapour pressure setting value tracking, if described RB pressure target value is higher than described main vapour
In the presence of force value and described RB actuating signal, described main vapour pressure setting value remains described RB pressure target value, if described
RB actuating signal not in the presence of, described main vapour pressure setting value switches to the described main vapour pressure initial set value of former control system
The most also include:
Described unit load according to detection, the described RB target load of acquisition, the described RB actuating signal that detects in advance
Judge, if in the presence of described unit load is less than described RB target load and described RB actuating signal, then sending steam turbine master
Control subtracts block signal.
The embodiment of the present invention additionally provides a kind of system based on RB process main vapour pressure setting value operation method, its feature
It is, including:
RB pressure target value computing unit, based on according to the described RB type obtained in advance or described RB target load
Calculate RB pressure target value；
Monitoring means, for monitoring main vapour pressure value in real time；
Main vapour pressure setting value determines unit, for according to the described RB actuating signal detected in advance and described former control being
The main vapour pressure initial set value of system, the described RB pressure target value of calculating, the described main vapour pressure value of monitoring judge, if
When described RB pressure target value is less than described main vapour pressure value, main vapour pressure value described in main vapour pressure setting value tracking, if described
In the presence of RB pressure target value is higher than described main vapour pressure value and described RB actuating signal, described main vapour pressure setting value remains
Described RB pressure target value, if described RB actuating signal not in the presence of, described main vapour pressure setting value switches to former control system
Described main vapour pressure initial set value.
Alternatively,
Described system based on RB process main vapour pressure setting value operation method also includes:
Obtain detector unit, for obtaining RB type or RB target load and detecting RB actuating signal, former control system
Main vapour pressure initial set value.
Alternatively,
Described RB pressure target value computing unit includes RB type pressure desired value computing unit and RB target load target
Value computing unit；
RB type pressure desired value computing unit, for according to the described RB type detected in advance, obtaining by switching mode
Obtain RB pressure target value；
RB target load desired value computing unit, for according to the described RB target load detected in advance, carrying out function fortune
Calculation obtains RB pressure target value.
Alternatively,
Described acquisition detector unit, is additionally operable to detect unit load.
Alternatively,
Described system based on RB process main vapour pressure setting value operation method also includes:
Safety detection unit, for described unit load, the described RB target load of acquisition according to detection, detects in advance
Described RB actuating signal judge, if described unit load exists less than described RB target load and described RB actuating signal
Time, then send turbine main control and subtract block signal.
As can be seen from the above technical solutions, the embodiment of the present invention has the advantage that
Suitable main vapour is finally determined by the main vapour pressure desired value calculating different RB types or RB target load
Pressure set points, the RB process in prior art that solves uses identical main vapour pressure setting value computing properly functioning with unit to return
What road was caused is unfavorable for the technical problem of unit safety, stable operation；Meanwhile, if unit load sets in advance less than RB target load
In the presence of fixed value and RB actuating signal, then sending turbine main control and subtract block signal, be possible to prevent that steam turbine pitch closes is too small, makes
Become the function of the additional disturbance of unit load, water supply system and vapor (steam) temperature.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, also may be used
To obtain other accompanying drawing according to these accompanying drawings.
One embodiment of a kind of RB process main vapour pressure setting value operation method that Fig. 1 provides for the embodiment of the present invention
Flow chart；
Another embodiment of a kind of RB process main vapour pressure setting value operation method that Fig. 2 provides for the embodiment of the present invention
Flow chart；
The one of a kind of based on RB process main vapour pressure setting value operation method the system that Fig. 3 provides for the embodiment of the present invention
The structural representation of individual embodiment；
A kind of based on RB process main vapour pressure setting value operation method the system that Fig. 4 provides for the embodiment of the present invention another
The structural representation of one embodiment；
Fig. 5 is the one of a kind of based on RB process main vapour pressure setting value operation method the system that the embodiment of the present invention provides
The structure principle chart of individual embodiment；
Fig. 6 is an embodiment of a kind of RB process main vapour pressure setting value operation method that the embodiment of the present invention provides
Structure principle chart；
Fig. 7 is another embodiment of a kind of RB process main vapour pressure setting value operation method that the embodiment of the present invention provides
Structure principle chart.
Detailed description of the invention
Embodiments provide a kind of RB process main vapour pressure setting value operation method and system, by calculating difference
RB type or the main vapour pressure desired value of RB target load finally determine suitable main vapour pressure setting value, solve existing
In technology, RB process uses that causes with the properly functioning identical main vapour pressure setting value operational loop of unit to be unfavorable for that unit is pacified
Entirely, the technical problem of stable operation.
For making the goal of the invention of the present invention, feature, the advantage can be the most obvious and understandable, below in conjunction with the present invention
Accompanying drawing in embodiment, is clearly and completely described the technical scheme in the embodiment of the present invention, it is clear that disclosed below
Embodiment be only a part of embodiment of the present invention, and not all embodiment.Based on the embodiment in the present invention, this area
All other embodiments that those of ordinary skill is obtained under not making creative work premise, broadly fall into present invention protection
Scope.
Refer to Fig. 1, a reality of a kind of RB process main vapour pressure setting value operation method that the embodiment of the present invention provides
Execute example to include:
101, calculate RB pressure target value according to the RB type obtained in advance or RB target load；
102, monitoring main vapour pressure value in real time；
103, according to the RB actuating signal detected in advance and the main vapour pressure initial set value of former control system, the RB of calculating
Pressure target value, the main vapour pressure value of monitoring judge, if RB pressure target value is less than main vapour pressure value, main vapour pressure sets
Definite value follows the tracks of main vapour pressure value, if in the presence of RB pressure target value is higher than main vapour pressure value and RB actuating signal, main vapour pressure sets
Definite value remains RB pressure target value, if RB actuating signal not in the presence of, main vapour pressure setting value switches to former control system
Main vapour pressure initial set value.
In the present embodiment, first calculate RB pressure target value according to the RB type obtained in advance or RB target load, then
Monitoring main vapour pressure value in real time, the main vapour pressure finally according to the RB actuating signal detected in advance and former control system initially sets
Value, the RB pressure target value calculated, the main vapour pressure value of monitoring judge, if RB pressure target value is less than main vapour pressure value
Time, main vapour pressure setting value tracking main vapour pressure value, if RB pressure target value exists higher than main vapour pressure value and RB actuating signal
Time, main vapour pressure setting value remains RB pressure target value, if RB actuating signal not in the presence of, main vapour pressure setting value switches to
The main vapour pressure initial set value of former control system.
Refer to Fig. 2, Fig. 6 and Fig. 7, a kind of RB process main vapour pressure setting value operation method that the embodiment of the present invention provides
Another embodiment include:
201, obtain RB type or RB target load and detect RB actuating signal, the main vapour pressure of former control system initially sets
Definite value and unit load；
202, according to the RB type detected in advance, obtain RB pressure target value by switching mode；
203, according to the described RB target load detected in advance, carry out functional operation and obtain RB pressure target value；
204, monitoring main vapour pressure value in real time；
205, according to the RB actuating signal detected in advance and the main vapour pressure initial set value of former control system, the RB of calculating
Pressure target value, the main vapour pressure value of monitoring judge, if RB pressure target value is less than main vapour pressure value, main vapour pressure sets
Definite value follows the tracks of main vapour pressure value, if in the presence of RB pressure target value is higher than main vapour pressure value and RB actuating signal, main vapour pressure sets
Definite value remains RB pressure target value, if RB actuating signal not in the presence of, main vapour pressure setting value switches to former control system
Main vapour pressure initial set value；
206, judge according to the unit load of detection, the RB target load of acquisition, the RB actuating signal that detects in advance,
If in the presence of unit load is less than RB target load and RB actuating signal, then sending turbine main control and subtract block signal.
In the present embodiment, first obtain RB type or RB target load and detect RB actuating signal, the master of former control system
Steam pressure initial set value and unit load, according to the described RB type detected in advance, obtain RB pressure by switching mode
Desired value such as following table one,
| Sequence number | RB type | Main vapour pressure desired value (MPa) |
| 1 | Coal pulverizer RB | 18 |
| 2 | Send air-introduced machine RB | 19.6 |
| 3 | Primary air fan RB | 16 |
| 4 | Feed pump RB | 16 |
Table one
Or according to the described RB target load detected in advance, carry out functional operation and obtain RB pressure target value such as following table
Two,
Table two
Monitoring main vapour pressure value the most in real time, according to the RB actuating signal detected in advance and the main vapour pressure of former control system
Initial set value, the RB pressure target value of calculating, the main vapour pressure value of monitoring judge, if RB pressure target value is less than main vapour
During force value, main vapour pressure setting value tracking main vapour pressure value, if RB pressure target value is higher than main vapour pressure value and RB action letter
In the presence of number, main vapour pressure setting value remains RB pressure target value, if RB actuating signal not in the presence of, main vapour pressure setting value
Switch to the main vapour pressure initial set value of former control system, finally according to described unit load, the described RB of acquisition of detection
Target load, the described RB actuating signal detected in advance judge, if described unit load moves less than RB target load and RB
In the presence of making signal, then send turbine main control and subtract block signal.
Referring to Fig. 3 and Fig. 5, the one that the embodiment of the present invention provides is based on RB process main vapour pressure setting value operation method
An embodiment of system include:
RB pressure target value computing unit, for calculating RB pressure according to the RB type obtained in advance or RB target load
Desired value；
Monitoring means, for monitoring main vapour pressure value in real time；
Main vapour pressure setting value determines unit, for according to the RB actuating signal detected in advance and the main vapour of former control system
Pressure set points, the RB pressure target value of calculating, the main vapour pressure value of monitoring judge, if RB pressure target value is less than main vapour
During force value, main vapour pressure setting value tracking main vapour pressure value, if RB pressure target value is higher than main vapour pressure value and RB action letter
In the presence of number, main vapour pressure setting value remains RB pressure target value, if RB actuating signal not in the presence of, main vapour pressure setting value
Main vapour pressure setting value for former control system.
Referring to Fig. 4 and Fig. 5, the one that the embodiment of the present invention provides is based on RB process main vapour pressure setting value operation method
Another embodiment of system include:
RB pressure target value computing unit, for calculating RB pressure according to the RB type obtained in advance or RB target load
Desired value；
Monitoring means, for monitoring main vapour pressure value in real time；
Main vapour pressure setting value determines unit, for according to the RB actuating signal detected in advance and the main vapour of former control system
Pressure set points, the RB pressure target value of calculating, the main vapour pressure value of monitoring judge, if RB pressure target value is less than main vapour
During force value, main vapour pressure setting value tracking main vapour pressure value, if RB pressure target value is higher than main vapour pressure value and RB action letter
In the presence of number, main vapour pressure setting value remains RB pressure target value, if RB actuating signal not in the presence of, main vapour pressure setting value
Main vapour pressure setting value for former control system.
System based on RB process main vapour pressure setting value operation method also includes:
Obtain detector unit, for obtaining RB type or RB target load and detecting RB actuating signal, former control system
Main vapour pressure initial set value.
RB pressure target value computing unit includes RB type pressure desired value computing unit and RB target load desired value meter
Calculate unit；
RB type pressure desired value computing unit, for according to the RB type detected in advance, obtaining RB by switching mode
Pressure target value；
RB target load desired value computing unit, for according to the RB target load detected in advance, carrying out functional operation and obtain
To RB pressure target value.
Obtain detector unit, be additionally operable to detect unit load.
System based on RB process main vapour pressure setting value operation method also includes:
Safety detection unit, for the unit load according to detection, the RB target load of acquisition, the RB action that detects in advance
Signal judges, if in the presence of unit load is less than RB target load and RB actuating signal, then sending turbine main control and subtract locking
Signal.
Those skilled in the art is it can be understood that arrive, for convenience and simplicity of description, and the system of foregoing description,
The specific works process of device and unit, is referred to the corresponding process in preceding method embodiment, does not repeats them here.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method are permissible
Realize by another way.Such as, device embodiment described above is only schematically, such as, and described unit
Dividing, be only a kind of logic function and divide, actual can have other dividing mode, the most multiple unit or assembly when realizing
Can in conjunction with or be desirably integrated into another system, or some features can be ignored, or does not performs.Another point, shown or
The coupling each other discussed or direct-coupling or communication connection can be the indirect couplings by some interfaces, device or unit
Close or communication connection, can be electrical, machinery or other form.
The described unit illustrated as separating component can be or may not be physically separate, shows as unit
The parts shown can be or may not be physical location, i.e. may be located at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected according to the actual needs to realize the mesh of the present embodiment scheme
's.
It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to two or more unit are integrated in a unit.Above-mentioned integrated list
Unit both can realize to use the form of hardware, it would however also be possible to employ the form of SFU software functional unit realizes.
If described integrated unit realizes and as independent production marketing or use using the form of SFU software functional unit
Time, can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part that in other words prior art contributed or this technical scheme completely or partially can be with the form of software product
Embodying, this computer software product is stored in a storage medium, including some instructions with so that a computer
Equipment (can be personal computer, server, or the network equipment etc.) performs the complete of method described in each embodiment of the present invention
Portion or part steps.And aforesaid storage medium includes: USB flash disk, portable hard drive, read only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
The above, above example only in order to technical scheme to be described, is not intended to limit；Although with reference to front
State embodiment the present invention has been described in detail, it will be understood by those within the art that: it still can be to front
State the technical scheme described in each embodiment to modify, or wherein portion of techniques feature is carried out equivalent；And these
Amendment or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a RB process main vapour pressure setting value operation method, it is characterised in that including:
RB pressure target value is calculated according to the described RB type obtained in advance or described RB target load；
Monitoring main vapour pressure value in real time；
According to the described RB actuating signal detected in advance and the main vapour pressure initial set value of described former control system, the institute of calculating
State RB pressure target value, the described main vapour pressure value of monitoring judges, if described RB pressure target value is less than described main vapour pressure
During force value, main vapour pressure value described in main vapour pressure setting value tracking, if described RB pressure target value is higher than described main vapour pressure value
And in the presence of described RB actuating signal, described main vapour pressure setting value remains described RB pressure target value, if described RB action
Signal not in the presence of, described main vapour pressure setting value switches to the described main vapour pressure initial set value of former control system.
RB process main vapour pressure setting value operation method the most according to claim 1, it is characterised in that according to examining in advance
The described RB type surveyed or described RB target load also include before calculating RB pressure target value:
Obtain RB type or RB target load and detect the main vapour pressure initial set value of RB actuating signal, former control system.
RB process main vapour pressure setting value operation method the most according to claim 1, it is characterised in that according to detecting in advance
Described RB type or described RB target load calculate RB pressure target value specifically include:
According to the described RB type detected in advance, obtain RB pressure target value by switching mode；
According to the described RB target load detected in advance, carry out functional operation and obtain RB pressure target value.
RB process main vapour pressure setting value operation method the most according to claim 1, it is characterised in that according to examining in advance
The described RB type surveyed or described RB target load also include before calculating RB pressure target value:
Detection unit load.
RB process main vapour pressure setting value operation method the most according to claim 4, it is characterised in that according to examining in advance
The described RB actuating signal surveyed and the main vapour pressure initial set value of described former control system, the described RB pressure target of calculating
Value, the described main vapour pressure value of monitoring judge, if described RB pressure target value is less than described main vapour pressure value, and main vapour pressure
Main vapour pressure value described in power setting value tracking, if described RB pressure target value is higher than described main vapour pressure value and described RB action letter
In the presence of number, described main vapour pressure setting value remains described RB pressure target value, if described RB actuating signal not in the presence of, institute
Also include after stating the described main vapour pressure initial set value that main vapour pressure setting value switches to former control system:
Described unit load according to detection, the described RB target load of acquisition, the described RB actuating signal that detects in advance are carried out
Judge, if in the presence of described unit load is less than described RB target load and described RB actuating signal, then sending turbine main control and subtract
Block signal.
6. a system based on RB process main vapour pressure setting value operation method, it is characterised in that including:
RB pressure target value computing unit, for calculating RB according to the described RB type obtained in advance or described RB target load
Pressure target value；
Monitoring means, for monitoring main vapour pressure value in real time；
Main vapour pressure setting value determines unit, for according to the described RB actuating signal that detects in advance and described former control system
Main vapour pressure initial set value, the described RB pressure target value of calculating, the described main vapour pressure value of monitoring judge, if described
When RB pressure target value is less than described main vapour pressure value, main vapour pressure value described in main vapour pressure setting value tracking, if described RB pressure
In the presence of power desired value is higher than described main vapour pressure value and described RB actuating signal, described main vapour pressure setting value remains described
RB pressure target value, if described RB actuating signal not in the presence of, described main vapour pressure setting value switches to the institute of former control system
State main vapour pressure initial set value.
System based on RB process main vapour pressure setting value operation method the most according to claim 6, it is characterised in that also
Including:
Obtain detector unit, for obtaining RB type or RB target load and detecting the main vapour of RB actuating signal, former control system
Pressure initial set value.
System based on RB process main vapour pressure setting value operation method the most according to claim 6, it is characterised in that institute
State RB pressure target value computing unit and include RB type pressure desired value computing unit and RB target load desired value computing unit；
RB type pressure desired value computing unit, for according to the described RB type detected in advance, obtaining RB by switching mode
Pressure target value；
RB target load desired value computing unit, for according to the described RB target load detected in advance, carrying out functional operation and obtain
To RB pressure target value.
System based on RB process main vapour pressure setting value operation method the most according to claim 7, it is characterised in that
Described acquisition detector unit, is additionally operable to detect unit load.
System based on RB process main vapour pressure setting value operation method the most according to claim 6, it is characterised in that
Also include:
Safety detection unit, for the described unit load according to detection, the described RB target load of acquisition, the institute detected in advance
State RB actuating signal to judge, if in the presence of described unit load is less than described RB target load and described RB actuating signal,
Then send turbine main control and subtract block signal.
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| 尹峰等: "火电机组全工况自动RB控制策略的研究与应用", 《浙江电力》 * |
| 王晓勇等: "某超临界350MW机组增压风机（带旁路）的RB控制", 《中国电力》 * |
| 马睿等: "600MW超临界循环流化床机组RB控制策略", 《中国电力》 * |
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| CN106200704B (en) | 2019-05-21 |
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