CN107218086A - Steam turbine and its sliding pressure curve correcting method and system based on load capacity - Google Patents
Steam turbine and its sliding pressure curve correcting method and system based on load capacity Download PDFInfo
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- CN107218086A CN107218086A CN201710630799.6A CN201710630799A CN107218086A CN 107218086 A CN107218086 A CN 107218086A CN 201710630799 A CN201710630799 A CN 201710630799A CN 107218086 A CN107218086 A CN 107218086A
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- curve
- main vapour
- vapour pressure
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- load
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
- F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
- F01D17/145—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path by means of valves, e.g. for steam turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/02—Arrangement of sensing elements
- F01D17/04—Arrangement of sensing elements responsive to load
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/003—Arrangements for testing or measuring
Abstract
The present invention discloses a kind of sliding pressure curve correcting method based on load capacity, including：Steam turbine is obtained on unit load and the sliding pressure curve of main vapour pressure setting value；By adjusting the main vapour pressure related to unit load, main steam pitch is set to act to default optimal pitch aperture, and the deviation between unit load and AGC instructions is met preparatory condition, to obtain the fair curve on different unit loads and corresponding main vapour pressure correction value；Fair curve is added on sliding pressure curve and carries out main vapour pressure set point correct.Sliding pressure curve correcting method disclosed in this invention, pressure adjustment is carried out according to by the revised main vapour pressure setting value of the correction value, the current main vapour pressure of steam turbine can be made to reach the setting value of perfect condition, the pitch aperture of steam turbine is optimal position simultaneously, the influence caused by the environmental factors such as environment temperature, steam turbine performance characteristic and the change of the heat supply amount of drawing gas to sliding pressure curve is eliminated with this.
Description
Technical field
The present invention relates to thermal control technology field, more particularly to a kind of sliding pressure curve amendment based on load capacity
Method.The invention further relates to a kind of sliding pressure curve amendment system based on load capacity and a kind of steam turbine.
Background technology
With the change of electricity power enterprise of China structure, accounting of the generation of electricity by new energy enterprise in power network is increasing, and this is just
It is required that thermal power plant more participates in peak load regulation network and primary frequency modulation, the requirement more and more higher to AGC performances.However as
The raising of AGC performances, the reasonability of thermal power plant main vapour pressure setting value just seems more and more important.Wherein, AGC
(Automatic Generation Control, Automatic Generation Control) system, refer to grid company scheduling system by with hair
The control network that power plant sets up, according to demand of the power network to electric power, issues load instruction to each generating set in power plant at any time, and
Each generating set in power plant completes generation adjustment at the appointed time according to the instruction, makes unit generation amount with bristling with anger under AGC
Deviation is made to be less than setting.
Generally using the method for operation of level pressure-sliding pressure-level pressure in the unit running process of thermal power plant, that is, low negative
Fixed pressure operation mode is used in the case of lotus and high load capacity, and sliding pressure operation mode is used in the shoulder load stage.Shoulder load
There is a corresponding relation, referred to as sliding pressure curve with unit load in main vapour pressure setting value.Sliding pressure curve is one negative with unit
Lotus is the full curve of variable, refers to steam turbine in the process of running, in the case of different load, if carrying out machine according to the curve
Group main vapour pressure control, then steam turbine operation efficiency highest.
However, sliding pressure curve is only applicable to specific operation, it is impossible to meet the various operating modes of unit operation, and due to environment
The change of temperature, the change of steam turbine performance characteristic, or even some thermal power plant's summers are run with pure condensate operating mode, and winter is responsible for heat supply, made
The need for unit safety, economical operation can not being met into fixed sliding pressure curve, or even influence unit load tape splicing ability, cause
Unit AGC performances decline to a great extent, and two detailed rules and regulations examination amounts are substantially improved.
Therefore, how to eliminate caused by the environmental factors such as environment temperature, steam turbine performance characteristic and the change of the heat supply amount of drawing gas to cunning
Buckle the influence of line, improve security, the economy in generating set running, meet unit load capacity needs,
And unit AGC performances are improved, it is those skilled in the art's technical problem urgently to be resolved hurrily.
The content of the invention
It is an object of the invention to provide a kind of sliding pressure curve correcting method based on load capacity, environment can be eliminated
Influence caused by the environmental factors such as temperature, steam turbine performance characteristic and the change of the heat supply amount of drawing gas to sliding pressure curve, improves generating set
Security, economy in running, meet unit load capacity needs, and improve unit AGC performances.The present invention's
Another object is to provide a kind of sliding pressure curve amendment system based on load capacity and a kind of steam turbine.
In order to solve the above technical problems, the present invention provides a kind of sliding pressure curve correcting method based on load capacity,
Including：
Steam turbine is obtained on unit load and the sliding pressure curve of main vapour pressure setting value；
By adjusting the main vapour pressure related to unit load, main steam pitch is set to act to default optimal pitch aperture,
And the deviation for instructing unit load and AGC meets preparatory condition, to obtain on different unit loads and corresponding main vapour pressure
The fair curve of power correction value；
The fair curve is added on the sliding pressure curve and carries out main vapour pressure set point correct.
Preferably, steam turbine is obtained on unit load and the sliding pressure curve of main vapour pressure setting value, is specifically included：Inquiry
The Default Value parameter of steam turbine, to obtain the sliding pressure curve.
Preferably, by adjusting the main vapour pressure related to unit load, main steam pitch is made to act to default optimal tune
Door aperture, to obtain the fair curve on different unit loads and corresponding main vapour pressure correction value, is specifically included：
Current pitch aperture is adjusted by pid algorithm；Wherein, its setting value is to preset optimal pitch aperture, its value of feedback
For current pitch aperture, its output valve is the corresponding main vapour pressure correction value of different unit loads；
Fair curve is drawn with corresponding main vapour pressure correction value according to unit load.
Preferably, by adjusting the main vapour pressure related to unit load, main steam pitch is made to act to default optimal tune
Door aperture, to obtain the fair curve on different unit loads and corresponding main vapour pressure correction value, is specifically included：
To the corresponding main vapour pressure setting value of current unit load on the sliding pressure curve, increments or decrements preset rank step by step
Ladder value；
When current pitch aperture is equal to and presets optimal pitch aperture, unit load now and corresponding main vapour pressure are obtained
Power correction value；
Fair curve is drawn with corresponding main vapour pressure correction value according to unit load.
Preferably, it is adjacent to several when drawing fair curve with corresponding main vapour pressure correction value according to unit load
Main vapour pressure correction value carried out curve fitting according to preset algorithm, with obtain change counting smooth fair curve.
Preferably, the fair curve is added to when carrying out main vapour pressure set point correct on the sliding pressure curve, if
Superposition process is terminated, then by the corresponding main vapour pressure correction value of unit load on the fair curve in superposition end time
It is modified as the fixation correction value of follow-up main vapour pressure setting value.
The present invention also provides a kind of sliding pressure curve amendment system based on load capacity, including
First acquisition module, for obtaining steam turbine on unit load and the sliding pressure curve of main vapour pressure setting value；
Second acquisition module, for by adjusting the main vapour pressure related to unit load, make main steam pitch act to
Optimal pitch aperture is preset, and the deviation for instructing unit load and AGC meets preparatory condition, it is negative on different units to obtain
The fair curve of lotus and corresponding main vapour pressure correction value；
Pressure correction module, main vapour pressure setting value is carried out for the fair curve to be added on the sliding pressure curve
Amendment.
Preferably, second acquisition module includes：
First adjustment module, for adjusting current pitch aperture by pid algorithm；Wherein, its setting value is default optimal
Pitch aperture, its value of feedback is current pitch aperture, and its output valve is the corresponding main vapour pressure correction value of different unit loads；
First drafting module, for drawing fair curve with corresponding main vapour pressure correction value according to unit load.
Preferably, second acquisition module includes：
Second adjustment module, for the corresponding main vapour pressure setting value of current unit load on the sliding pressure curve step by step
Increments or decrements preset step values；
Secondary acquisition module, for when current pitch aperture is equal to and presets optimal pitch aperture, obtaining unit now
Load and corresponding main vapour pressure correction value；
Second drafting module, for drawing fair curve with corresponding main vapour pressure correction value according to unit load.
The present invention also provides a kind of steam turbine, including as described above any one of three based on load capacity
Sliding pressure curve amendment system.
Sliding pressure curve correcting method provided by the present invention based on load capacity, it is main to include three steps, its
In, in the first step, it is necessary first to obtain the sliding pressure curve of steam turbine, the sliding pressure curve is set with unit load and main vapour pressure
Value is related.In second step, it is contemplated that the pitch aperture of steam turbine is directly related with main vapour pressure and unit load, and in ideal
In the case of, if pitch aperture is optimal value, main vapour pressure setting value should be equal with main vapour pressure, and unit load instruction also should
It is equal with actual load, meanwhile, now unit load meets the deviation between the control requirement of AGC system, and AGC instructions simultaneously
Meet preparatory condition.Therefore, in this step, can be by the way that the current main vapour pressure of unit be adjusted, until main steam is adjusted
Door action is obtained in the case of different unit loads, when pitch aperture is optimal to the mode for presetting optimal pitch aperture
Main vapour pressure value during value, the value and the main vapour pressure setting value on sliding pressure curve, which are compared, can obtain different units and bear
The corresponding main vapour pressure correction value of lotus, and one amendment of multigroup unit load and the formation of corresponding main vapour pressure amendment Value Data
Curve.In the third step, you can fair curve is added on sliding pressure curve and carries out main vapour pressure set point correct, so that main vapour
Pressure value is rapidly reached revised setting value, while pitch aperture is also quickly adjusted to the corresponding optimal tune of current unit load
Door open position.In summary, the sliding pressure curve correcting method provided by the present invention based on load capacity, passes through regulation
The main vapour pressure related to unit load, makes main steam pitch act to default optimal pitch aperture, at the same make unit load with
The deviation of AGC instruction deviations meets preparatory condition, so that the main vapour pressure correction value corresponding to different unit loads is obtained, according to
Pressure adjustment is carried out by the revised main vapour pressure setting value of the correction value, you can reach the current main vapour pressure of steam turbine
The setting value of perfect condition, while making the pitch aperture of steam turbine be optimal position, it is special to eliminate environment temperature, steam turbine with this
Property and the influence caused by environmental factor to sliding pressure curve such as the heat supply amount of drawing gas change, and improve in generating set running
Security, economy, meet unit load capacity needs, improve unit AGC performances.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of flow chart of embodiment provided by the present invention；
Fig. 2 is a kind of module map of embodiment provided by the present invention；
Fig. 3 is the module map of another embodiment provided by the present invention.
Wherein, in Fig. 2-Fig. 3：
First acquisition module -1, the second acquisition module -2, the first adjustment module -201, the first drafting module -202,
Second adjustment module -211, secondary acquisition module -212, the second drafting module -213, pressure correction module -3.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Fig. 1 is refer to, Fig. 1 is a kind of flow chart of embodiment provided by the present invention.
In a kind of embodiment provided by the present invention, the sliding pressure curve correcting method based on load capacity
It is main to include three steps, be respectively：Steam turbine is obtained on unit load and the sliding pressure curve of main vapour pressure setting value；Pass through
The regulation main vapour pressure related to unit load, makes main steam pitch act to default optimal pitch aperture, and make unit load
And the deviation of AGC instruction deviations meets preparatory condition, obtains on different unit loads and corresponding main vapour pressure correction value
Fair curve；Fair curve is added on the sliding pressure curve and carries out main vapour pressure set point correct.
Wherein, in the first step, because steam turbine is in the running of most of load, carried out according to its sliding pressure curve
Main vapour pressure is adjusted, therefore, steam turbine can be obtained on unit load and the sliding pressure curve of main vapour pressure setting value first.Specifically
, in this step, it can be obtained by inquiring about the Default Value parameter of steam turbine.Certainly, field test scene can also be passed through
Draw sliding pressure curve.
In second step, it is contemplated that property parameters or the ambient parameter such as environment temperature, steam turbine performance characteristic and the heat supply amount of drawing gas
It can change, and the main vapour pressure setting value on sliding pressure curve corresponding to each unit load is only capable of being adapted to above-mentioned property parameters
Or a small number of operating modes that ambient parameter does not change, therefore the corresponding main vapour pressure setting value of difference unit load in sliding pressure curve
Need amendment.In this step, it is contemplated that the pitch aperture of steam turbine is directly related with main vapour pressure and unit load and resonable
In the case of thinking, if pitch aperture is optimal value, main vapour pressure setting value should be equal with main vapour pressure, then unit load is instructed
Should be equal with actual load, meanwhile, unit load is by the real-time control of AGC system, therefore unit load should meet AGC systems simultaneously
The control requirement of system.General, when unit load, which meets AGC controls, to be required, the deviation of unit load and AGC instructions should be less than
Two detailed rules and regulations appraisal standards of power network.Therefore, can be by the way that the current main vapour pressure of unit be adjusted, until main steam pitch is moved
Make (such as rotate electrically operated gate etc.) to default optimal pitch aperture, and meet the deviation between unit load and AGC instructions
The mode of preparatory condition, is obtained in the case of different unit loads, the main vapour pressure value when pitch aperture is optimal value,
Then the corresponding main vapour of different unit loads can be obtained by being compared the value and the main vapour pressure setting value on sliding pressure curve
Pressure correction value, and multigroup unit load and corresponding main vapour pressure amendment Value Data one fair curve of formation.
In the third step, when adjusting the main vapour pressure value of steam turbine, the fair curve of above-mentioned acquisition can be added to and obtained
In the sliding pressure curve taken, so as to be modified to the corresponding main vapour pressure setting value of different unit loads on sliding pressure curve, make it
Increase reduces, so that revised main vapour pressure setting value more adapts to actual work of the steam turbine under current unit load
Condition and ambient influnence.
In this way, the sliding pressure curve correcting method based on load capacity that the present embodiment is provided, by will be with unit
The related main vapour pressure of load is adjusted, and main steam pitch is acted to default optimal pitch aperture, and make unit load and
Deviation between AGC instructions meets preparatory condition, so that the main vapour pressure correction value corresponding to different unit loads is obtained, according to
Pressure adjustment is carried out by the revised main vapour pressure setting value of the correction value, you can reach the current main vapour pressure of steam turbine
The setting value of perfect condition, while making the pitch aperture of steam turbine be optimal position, it is special to eliminate environment temperature, steam turbine with this
Property and the influence caused by environmental factor to sliding pressure curve such as the heat supply amount of drawing gas change, and improve in generating set running
Security, economy, meet unit load capacity needs, improve unit AGC performances.Also, by correcting unit sliding pressure
Curve, can make unit pitch all the time in a relatively reasonable valve opening, it is ensured that unit economy, and can make unit master
Steam pressure any load section all in a relatively reasonable scope, so as to avoid the master brought because of main vapour pressure toning
Vapour overheating problem.
In the regulation current main vapour pressure of unit, main steam pitch is set to act to default optimal pitch aperture, to obtain amendment
During curve, specifically, current pitch aperture can be adjusted by pid algorithm.Wherein, PID setting values are related to load optimal
The output of pitch aperture (or steam turbine master control instruction) function, being fed back to current pitch aperture, (or actual steam turbine control refers to
Make), current main vapour pressure setting value is corrected by pid algorithm output, reaching optimal pitch aperture, (or steam turbine master control refers to
Make).And after curve amendment terminates, current PID output modifiers can be preserved automatically.Also, some groups of unit loads with
Corresponding main vapour pressure amendment Value Data can be depicted as a fair curve according to the order that gradually rises of unit load.
In addition, in the regulation current main vapour pressure of unit, making main steam pitch act to default optimal pitch aperture, to obtain
During fair curve, specifically, directly can also be carried out to the corresponding main vapour pressure setting value of current unit load on sliding pressure curve
Adjust step by step, adjacent two-stage regulation difference is fixed value, that is, presets step values, until steam turbine current pitch aperture (or
Steam turbine control command value) being equal to default optimal pitch aperture, (steam turbine pitch aperture optimal value is bent according to valve flow characteristic
Line determines that steam turbine control instruction optimal value is the function-output using unit load as variable, is determined according to machine unit characteristic) be
Only, wherein, the default step values are typically chosen according to machine unit characteristic, control accuracy and power network characteristic, preferably can be
0.1MPa etc., can be adjusted flexibly during specific implementation.Then when current pitch aperture is equal to and presets optimal pitch aperture, obtain
Take unit load now and corresponding main vapour pressure setting value and correction value.Afterwards, some groups of unit loads and corresponding master
Steam pressure amendment Value Data can be depicted as a fair curve according to the order that gradually rises of unit load.With above by PID
Algorithm be adjusted it is identical, equally can be corresponding by different unit loads after the completion of the regulation of method in the present embodiment
Main vapour pressure correction value is preserved.
Further, no matter take any in above two adjusting method, after the adjustment is completed, can obtain one
The fair curve that bar is drawn.Specifically, the fair curve may generally be jump function image, such as every load pressures such as 1MPa
Carry out Primary regulation and keeping records.And in view of the different sections in jump function, because there is larger numerical value difference, entering
When line number value switches, the special handoff algorithms (change that handoff algorithms are exported using speed limit pattern, limitation piecewise function can be passed through
Speed, so as to realize the smooth change of numerical value), the larger sudden transformation for eliminating sliding pressure curve will be segmented jump function
Sectional broken line function is modified to, and the sectional broken line function can also use special output algorithm in addition, such as take the section
Average value or maximum, minimum value etc..Meanwhile, in order to avoid excessive step as far as possible, when adjusting current pitch aperture, it can try one's best
Piecewise function load section is divided more, reduces the difference between each section function-output.The division of load section should make each negative
The difference of function-output between lotus section is no more than 0.1MPa, also can suitably be adjusted according to machine unit characteristic.
Further, after algorithm progress speed limit processing formation sectional broken line function is switched over to fair curve, also
Several adjacent main vapour pressure correction values on fair curve can be carried out curve fitting according to preset algorithm, to obtain rate of change
Smooth fair curve.In this way, further sectional broken line function is modified, the piece-wise step of unit load it is sufficiently fine and
When quantity is enough, the fair curve for changing counting smooth will more adapt to the change of actual condition.
In addition, the necessity to improve sliding pressure curve amendment, it is to avoid can also start in maloperation, the present embodiment to sliding pressure
Curve sets up beginning judgment step before being modified.Specifically, under steady state conditions, main vapour pressure is stable and reaches current pressure
Power setting value (sliding pressure curve output plus correction value), steam turbine control instruction is more than 85%, and (value is according to the valve of particular rack
Characteristic is determined), and unit load and AGC instruct deviation be more than two detailed rules and regulations examination values (be when the examination value of the first two detailed rules and regulations ±
2MW, selects unit load to instruct 2MW less than AGC in this place, represents that pressure is relatively low, the numerical value examines the change of detailed rules and regulations according to power network
It can change).The criterion mainly judges that the main vapour pressure setting value in the case of current loads is less than steam turbine actual demand.
Meanwhile, under steady state conditions, main vapour pressure is stable and reaches current pressure setting value (output of sliding pressure curve plus amendment
Value), unit load and AGC instruct deviation (± 2MW changes according to two detailed rules and regulations regulations of power network) in allowed band, but steamer
Machine control instruction is less than a certain limit value, and (definite value is a function-output using unit load as variable, special according to unit
Property determine) or steam turbine pitch not economic valve position (being determined according to unit valve flow characteristic curve).The criterion is mainly sentenced
Main vapour pressure setting value in the case of disconnected current loads is higher than steam turbine actual demand or steam turbine pitch not in economic valve position.
If two above criterion meet wherein any one, you can start to be modified sliding pressure curve.
Similarly, it is the integrality of raising sliding pressure curve amendment, it is to avoid can also be to sliding pressure curve in maloperation, the present embodiment
End judgment step is set up after being modified.Specifically, when main vapour pressure setting value and main vapour pressure is equal or deviation is less than
A certain fixed value, and keep stable；Unit load is instructed and unit actual load is equal or deviation is less than a certain fixed value, and is protected
It is fixed to keep steady；Steam turbine pitch aperture (or steam turbine master control instruction) is optimal value, and keeps stable.Three conditions are simultaneously full
When sufficient, it is believed that in place, main vapour pressure sliding pressure curve amendment process can smoothly terminate for the amendment of main vapour pressure setting value.
In addition, when carrying out sliding pressure curve amendment, algorithm (the i.e. sliding pressure of sliding pressure curve amendment can be traced in the output of fair curve
The superposition calculation of curve and fair curve) output, once curve amendment process terminates or interrupted, superposition process is terminated, this
When can will on fair curve superposition end time the corresponding main vapour pressure correction value of unit load be used as follow-up main vapour pressure
The fixation correction value of setting value is modified.
As shown in Fig. 2 Fig. 2 is a kind of module map of embodiment provided by the present invention.
The present embodiment also provides a kind of sliding pressure curve amendment system based on load capacity, main to include the first acquisition
Module 1, the second acquisition module 2 and pressure correction module 3.Wherein, the first acquisition module 1 is mainly used in obtaining steam turbine on machine
Group load and the sliding pressure curve of main vapour pressure setting value.Second acquisition module 2 is mainly used in related to unit load by adjusting
Main vapour pressure, main steam pitch is acted to default optimal pitch aperture, and make unit load and AGC instruct between deviation
Preparatory condition is met, to obtain the fair curve on different unit loads and corresponding main vapour pressure correction value.Pressure correction
Module 3, which is mainly used in fair curve being added on sliding pressure curve, carries out main vapour pressure set point correct.
In a kind of preferred embodiment on the second acquisition module 2, second acquisition module 2 specifically may include first
The drafting module 202 of adjustment module 201 and first.Wherein, the first adjustment module 201 is mainly used in current by pid algorithm regulation
Pitch aperture；Wherein, its setting value is to preset optimal pitch aperture, and its value of feedback is current pitch aperture, and its output valve is not
The corresponding main vapour pressure correction value with unit load.And the first drafting module 202 is mainly used according to the first adjustment module 201
Different unit loads are drawn fair curve by output with corresponding main vapour pressure correction value.
As shown in figure 3, Fig. 3 is the module map of another embodiment provided by the present invention.
In another preferred embodiment on the second acquisition module 2, second acquisition module 2 specifically may include the
Two adjustment modules 211, the secondary drafting module 213 of acquisition module 212 and second.Wherein, the second adjustment module 211 is mainly used in pair
Increments or decrements preset step values to current pitch aperture step by step.Secondary acquisition module 212 is mainly used in current pitch aperture etc.
When optimal pitch aperture is preset, unit load now and corresponding main vapour pressure correction value are obtained.Second drafting module 213
It is mainly used in drawing fair curve with corresponding main vapour pressure correction value according to unit load.
The present embodiment also provides a kind of steam turbine, mainly includes the sliding pressure curve amendment system based on load capacity,
Wherein, the sliding pressure curve amendment system based on load capacity is identical with above-mentioned related content, and here is omitted.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (10)
1. a kind of sliding pressure curve correcting method based on load capacity, it is characterised in that including：
Steam turbine is obtained on unit load and the sliding pressure curve of main vapour pressure setting value；
By adjusting the main vapour pressure related to unit load, main steam pitch is set to act to default optimal pitch aperture, and make
Unit load and the deviation of AGC instructions meet preparatory condition, are repaiied with obtaining on different unit loads with corresponding main vapour pressure
On the occasion of fair curve；
The fair curve is added on the sliding pressure curve and carries out main vapour pressure set point correct.
2. the sliding pressure curve correcting method according to claim 1 based on load capacity, it is characterised in that obtain vapour
Turbine is specifically included on unit load and the sliding pressure curve of main vapour pressure setting value：The Default Value parameter of steam turbine is inquired about,
To obtain the sliding pressure curve.
3. the sliding pressure curve correcting method according to claim 1 based on load capacity, it is characterised in that by adjusting
The section main vapour pressure related to unit load, makes main steam pitch act to default optimal pitch aperture, and make unit load and
The deviation of AGC instructions meets preparatory condition, to obtain the amendment on different unit loads and corresponding main vapour pressure correction value
Curve, is specifically included：
Current pitch aperture is adjusted by pid algorithm；Wherein, its setting value is to preset optimal pitch aperture, and its value of feedback is to work as
Preceding pitch aperture, its output valve is the corresponding main vapour pressure correction value of different unit loads；
Fair curve is drawn with corresponding main vapour pressure correction value according to unit load.
4. the sliding pressure curve correcting method according to claim 1 based on load capacity, it is characterised in that by adjusting
The section main vapour pressure related to unit load, makes main steam pitch act to default optimal pitch aperture, to obtain on difference
Unit load and the fair curve of corresponding main vapour pressure correction value, are specifically included：
To the corresponding main vapour pressure setting value of current unit load on the sliding pressure curve, increments or decrements preset step values step by step；
When current pitch aperture is equal to and presets optimal pitch aperture, the unit load obtained now is repaiied with corresponding main vapour pressure
On the occasion of；
Fair curve is drawn with corresponding main vapour pressure correction value according to unit load.
5. the sliding pressure curve correcting method based on load capacity according to claim 3 or 4, it is characterised in that paint
During fair curve processed, to several, adjacent main vapour pressure correction value carries out curve fitting according to preset algorithm, to obtain change
The fair curve of counting smooth.
6. the sliding pressure curve correcting method according to claim 5 based on load capacity, it is characterised in that will be described
Fair curve is added to when carrying out main vapour pressure set point correct on the sliding pressure curve, if superposition process is terminated, by institute
State on fair curve superposition end time the corresponding main vapour pressure correction value of unit load set as follow-up main vapour pressure
The fixation correction value of value is modified.
7. a kind of sliding pressure curve amendment system based on load capacity, it is characterised in that including
First acquisition module, for obtaining steam turbine on unit load and the sliding pressure curve of main vapour pressure setting value；
Second acquisition module, for by adjusting the main vapour pressure related to unit load, making main steam pitch act to default
Optimal pitch aperture, and make unit load meet preparatory condition with the AGC deviations instructed, to obtain on different unit loads and
The fair curve of corresponding main vapour pressure correction value；
Pressure correction module, carries out main vapour pressure setting value on the sliding pressure curve for the fair curve to be added to and repaiies
Just.
8. the sliding pressure curve amendment system according to claim 7 based on load capacity, it is characterised in that described
Two acquisition modules include：
First adjustment module, for adjusting current pitch aperture by pid algorithm；Wherein, its setting value is to preset optimal pitch
Aperture, its value of feedback is current pitch aperture, and its output valve is the corresponding main vapour pressure correction value of different unit loads；
First drafting module, for drawing fair curve with corresponding main vapour pressure correction value according to unit load.
9. the sliding pressure curve amendment system according to claim 7 based on load capacity, it is characterised in that described
Two acquisition modules include：
Second adjustment module, for increments or decrements to preset step values step by step to current pitch aperture；
Secondary acquisition module, for when current pitch aperture is equal to and presets optimal pitch aperture, obtaining unit load now
With corresponding main vapour pressure correction value；
Second drafting module, for drawing fair curve with corresponding main vapour pressure correction value according to unit load.
10. a kind of steam turbine, it is characterised in that including as described in claim any one of 7-9 based on load capacity
Sliding pressure curve amendment system.
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| CN108954284A (en) * | 2018-08-02 | 2018-12-07 | 华能平凉发电有限责任公司 | A kind of Stream temperature degree control method and system based on main vapour pressure control |
| CN110794719A (en) * | 2019-11-20 | 2020-02-14 | 国电开远发电有限公司 | Safety regulation control method of thermal generator set |
| CN110947279A (en) * | 2019-12-06 | 2020-04-03 | 马光俊 | Control method for rapidly changing working conditions |
| CN111537256A (en) * | 2020-05-22 | 2020-08-14 | 华能平凉发电有限责任公司 | Method and system for analyzing reason for unqualified AGC (automatic gain control) performance of thermal generator set |
| CN111830831A (en) * | 2020-07-23 | 2020-10-27 | 天津国电津能滨海热电有限公司 | Control optimization method and control optimization system applying multi-term self-adaptive dynamic feedforward |
| CN112072673A (en) * | 2020-09-10 | 2020-12-11 | 华能国际电力股份有限公司玉环电厂 | Power plant power generation side load response method and system thereof |
| CN112377275A (en) * | 2020-11-18 | 2021-02-19 | 润电能源科学技术有限公司 | Operation control method, device and equipment for throttling steam distribution turbine |
| CN112648029A (en) * | 2020-12-14 | 2021-04-13 | 华能国际电力股份有限公司上安电厂 | Coordinated control optimization method for deep peak regulation working condition of thermal power plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108954284A (en) * | 2018-08-02 | 2018-12-07 | 华能平凉发电有限责任公司 | A kind of Stream temperature degree control method and system based on main vapour pressure control |
| CN108954284B (en) * | 2018-08-02 | 2019-11-05 | 华能平凉发电有限责任公司 | A kind of Stream temperature degree control method and system based on main vapour pressure control |
| CN110794719A (en) * | 2019-11-20 | 2020-02-14 | 国电开远发电有限公司 | Safety regulation control method of thermal generator set |
| CN110947279B (en) * | 2019-12-06 | 2022-03-04 | 马光俊 | Control method for rapidly changing working conditions |
| CN110947279A (en) * | 2019-12-06 | 2020-04-03 | 马光俊 | Control method for rapidly changing working conditions |
| CN111537256A (en) * | 2020-05-22 | 2020-08-14 | 华能平凉发电有限责任公司 | Method and system for analyzing reason for unqualified AGC (automatic gain control) performance of thermal generator set |
| CN111537256B (en) * | 2020-05-22 | 2022-06-14 | 华能平凉发电有限责任公司 | Method and system for analyzing reason for unqualified AGC (automatic gain control) performance of thermal generator set |
| CN111830831A (en) * | 2020-07-23 | 2020-10-27 | 天津国电津能滨海热电有限公司 | Control optimization method and control optimization system applying multi-term self-adaptive dynamic feedforward |
| CN111830831B (en) * | 2020-07-23 | 2022-07-01 | 天津国能津能滨海热电有限公司 | Control optimization method and control optimization system applying multi-term self-adaptive dynamic feedforward |
| CN112072673A (en) * | 2020-09-10 | 2020-12-11 | 华能国际电力股份有限公司玉环电厂 | Power plant power generation side load response method and system thereof |
| CN112377275A (en) * | 2020-11-18 | 2021-02-19 | 润电能源科学技术有限公司 | Operation control method, device and equipment for throttling steam distribution turbine |
| CN112648029A (en) * | 2020-12-14 | 2021-04-13 | 华能国际电力股份有限公司上安电厂 | Coordinated control optimization method for deep peak regulation working condition of thermal power plant |
| CN112648029B (en) * | 2020-12-14 | 2022-08-05 | 华能国际电力股份有限公司上安电厂 | Coordinated control optimization method for deep peak regulation working condition of thermal power plant |
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