CN108240238A - The control system of steam extraction back pressure feed pump turbine and control method, steam turbine - Google Patents
The control system of steam extraction back pressure feed pump turbine and control method, steam turbine Download PDFInfo
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- CN108240238A CN108240238A CN201611217159.4A CN201611217159A CN108240238A CN 108240238 A CN108240238 A CN 108240238A CN 201611217159 A CN201611217159 A CN 201611217159A CN 108240238 A CN108240238 A CN 108240238A
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- 238000000605 extraction Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 238000009423 ventilation Methods 0.000 claims description 17
- 238000005259 measurement Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
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
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- Control Of Turbines (AREA)
Abstract
The present invention provides a kind of control system and control method, steam turbine of steam extraction back pressure feed pump turbine, including measuring unit, control unit and execution unit；The measuring unit is used to measuring tach signal needed for steam turbine control, temperature signal, exhaust steam pressure signal and into vapour pitch valve position signal；Described control unit the tach signal that comes according to measuring unit transmission, temperature signal, exhaust steam pressure signal and sends speed controling signal, exhaust steam pressure control signal, special operation condition control signal to execution unit for setting exhaust steam pressure setting value into vapour pitch valve position signal；The execution unit is used for the speed controling signal sent according to described control unit, exhaust steam pressure control signal, special operation condition control signal and performs corresponding operation.The control system and control method, steam turbine of the steam extraction back pressure feed pump turbine of the present invention disclosure satisfy that the requirement of boiler feedwater rotating speed, also disclosure satisfy that steam extraction, steam discharge to heater requirement.
Description
Technical field
The present invention relates to the technical field of steam turbine, more particularly to a kind of control system of steam extraction back pressure feed pump turbine
System and control method, steam turbine.
Background technology
Feed pump turbine is one of critical piece of power station circulation system, particularly in the super of high parameter large capacity
It is occupied an important position in supercritical unit, safe and reliable operation, directly affects entire power station equipment operation.Because it is being pacified
Full reliability, automatization level, load adaptability etc. requirement are very high, and gigawatt grade unit feed pump turbine is current
Only have several companies that can manufacture and design in the world.
Existing feed pump turbine meets the needs of boiler feedwater merely by the rotating speed of control pump.And steam extraction is carried on the back
Feed pump turbine (Backpressure Extraction Steam Turbine, BEST) is pressed as novel driving feedwater mercury vapour
Turbine, in addition to boiler feedwater is met, steam extraction, steam discharge will also meet the use vapour demand of heater.
Specifically, steam extraction back pressure feed pump turbine is also devised with steam bleeding system, and steam is extracted out from steam turbine for adding
Hot device uses, using the degree of superheat relatively low extracted steam from turbine and steam discharge, by heater come heat-setting water and feedwater.With it is existing
Therrmodynamic system is compared, and steam extraction back pressure feed pump turbine has the following advantages：
(1) since extraction temperature is low, efficiency of thermal cycle is improved, there is huge energy-saving and emission-reduction benefit；
(2) since extraction temperature is low, the material rate of related extraction line, valve, heater is reduced, has saved pipe
The manufacture cost in road, valve and equipment；
(3) since the flow of entire steam turbine increases, the efficiency of feed pump turbine is also improved.
At the same time, higher requirement also proposed to the control of steam extraction back pressure feed pump turbine, i.e., steam extraction is carried on the back
Pressure feedwater not only needs the rotating speed that control pumps, it is also necessary to control exhaust steam pressure.In addition, it can be influenced simultaneously since exhaust steam pressure changes
The variation of rotating speed causes to increase difficulty to rotating speed control.
Invention content
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of steam extraction back pressure feed pump steamers
The control system and control method of machine, steam turbine can ensure during steam turbine operation, can both meet boiler feedwater rotating speed
Requirement, also simultaneously meet steam extraction, steam discharge to heater requirement.
In order to achieve the above objects and other related objects, the present invention provides a kind of control of steam extraction back pressure feed pump turbine
System, including measuring unit, control unit and execution unit；The measuring unit is used to measure the rotating speed needed for steam turbine control
Signal, temperature signal, exhaust steam pressure signal and into vapour pitch valve position signal；Described control unit is connected with the measuring unit,
Including exhaust steam pressure setting module, rotational speed governor, exhaust steam pressure controller, for setting exhaust steam pressure setting value, according to institute
It states the next tach signal of measuring unit transmission, temperature signal, exhaust steam pressure signal and sends rotating speed control into vapour pitch valve position signal
Signal processed, exhaust steam pressure control signal, special operation condition control signal to execution unit；The execution unit and described control unit
It is connected, including into vapour pitch, steam discharge ventilation valve, steam discharge overflow valve and steam discharge filling valve, for being sent according to described control unit
Speed controling signal, exhaust steam pressure control signal, the special operation condition control signal come performs corresponding operation.
In one embodiment of the invention, tach signal and rotating speed that the rotational speed governor carrys out measuring unit transmission
Setting value compares, and the deviation of the two is carried out operation by PID controller, output flow is instructed into vapour pitch control of valve position
Device, to control the rotating speed of steam turbine.
In one embodiment of the invention, the exhaust steam pressure controller believes the exhaust steam pressure that measuring unit transmission comes
Number compared with exhaust steam pressure setting value, the deviation of the two is passed through into PID controller and carries out operation, output order to steam discharge filling
Valve, steam discharge overflow valve and steam discharge ventilation valve, to control the exhaust steam pressure of steam turbine.
In one embodiment of the invention, when exhaust steam pressure signal is less than exhaust steam pressure setting value, steam discharge overflow valve is turned down
Until it is fully closed, and steam discharge filling valve is opened after steam discharge overflow valve is fully closed；When exhaust steam pressure signal is higher than exhaust steam pressure setting value
When, steam discharge filling valve is turned down up to fully closed, and steam discharge overflow valve is opened after steam discharge filling valve is fully closed.
In one embodiment of the invention, when steam extraction back pressure feed pump turbine is more than setting value into vapour pitch opening degree instruction
When, exhaust steam pressure setting value is reduced, opens steam discharge overflow valve to reduce exhaust steam pressure.
Meanwhile the present invention also provides a kind of control method of steam extraction back pressure feed pump turbine, include the following steps：
Measure tach signal needed for steam turbine control, temperature signal, exhaust steam pressure signal and into vapour pitch valve position signal；
Set exhaust steam pressure setting value, according to tach signal, temperature signal, exhaust steam pressure signal and into vapour pitch valve position believe
Number send speed controling signal, exhaust steam pressure control signal and special operation condition control signal；
According to speed controling signal, exhaust steam pressure control signal, special operation condition control signal by divulging information into vapour pitch, steam discharge
Valve, steam discharge overflow valve and steam discharge filling valve perform corresponding operation.
In one embodiment of the invention, the tach signal of measurement with speed setting value is compared, the deviation of the two is led to
It crosses PID controller and carries out operation, output flow is instructed into vapour pitch valve positioner, to control the rotating speed of steam turbine.
In one embodiment of the invention, the exhaust steam pressure signal of measurement is compared with exhaust steam pressure setting value, by the two
Deviation pass through PID controller carry out operation, output order to steam discharge filling valve, steam discharge overflow valve and steam discharge ventilation valve, with control
The exhaust steam pressure of steam turbine processed.
In one embodiment of the invention, when exhaust steam pressure signal is less than exhaust steam pressure setting value, steam discharge overflow valve is turned down
Until it is fully closed, and steam discharge filling valve is opened after steam discharge overflow valve is fully closed；When exhaust steam pressure signal is higher than exhaust steam pressure setting value
When, steam discharge filling valve is turned down up to fully closed, and steam discharge overflow valve is opened after steam discharge filling valve is fully closed.
In addition, the present invention also provides a kind of steam turbine, including steam extraction back pressure feed pump turbine ontology, carried on the back with the steam extraction
The control system of any of the above-described steam extraction back pressure feed pump turbine that pressure feed pump turbine ontology is connected, the steam extraction
The control system of back pressure feed pump is used to control the steam extraction back pressure feed pump ontology.
As described above, the control system of steam extraction back pressure feed pump turbine of the present invention and control method, steam turbine, have
Following advantageous effect：
(1) it during steam turbine operation, disclosure satisfy that the requirement of boiler feedwater rotating speed, also disclosure satisfy that steam extraction, steam discharge
To the requirement of heater；
(2) it ensure that the flexible modulation to rotating speed.
Description of the drawings
Fig. 1 is shown as the structure diagram of the control system of the steam extraction back pressure feed pump turbine of the present invention；
Fig. 2 is shown as the schematic diagram of the control system of the steam extraction back pressure feed pump turbine of the present invention；
Fig. 3 is shown as the flow chart of the control method of the steam extraction back pressure feed pump turbine of the present invention；
Fig. 4 is shown as the structure diagram of the steam turbine of the present invention.
Component label instructions
The control system of 1 steam extraction back pressure feed pump turbine
11 measuring units
12 control units
13 execution units
2 steam extraction back pressure feed pump turbine ontologies
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.It should be noted that in the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
It should be noted that the diagram provided in following embodiment only illustrates the basic structure of the present invention in a schematic way
Think, component count, shape and size when only display is with related component in the present invention rather than according to actual implementation in schema then
It draws, kenel, quantity and the ratio of each component can be a kind of random change during actual implementation, and its assembly layout kenel
It is likely more complexity.
The present invention steam extraction back pressure feed pump turbine control system and control method, the Controlling principle of steam turbine be：
Based on controlling with speed of feedwater, exhaust pressure control, temperature and the limitation of steam discharge pressure ratio are taken into account；Extraction pressure is not adjusted, with
Extraction check valves at different levels, input steam extraction to heater are gradually opened in the increase of main unit load from low to high.Therefore, it is of the invention
The major function of the control system of steam extraction back pressure feed pump turbine includes rotating speed control, exhaust steam pressure control, exhaust steam pressure tune
Save the unit allocation under steam turbine output and special operation condition.
Referring to Figures 1 and 2, the control system 1 of steam extraction back pressure feed pump turbine of the invention includes measuring unit 11, control
Unit 12 and execution unit 13 processed.
Measuring unit 11 be used to measuring tach signal needed for steam turbine control, temperature signal, exhaust steam pressure signal and into
Vapour pitch valve position signal.
Control unit 12 is connected with measuring unit 11, including exhaust steam pressure setting module, rotational speed governor, exhaust steam pressure control
Device processed, for setting exhaust steam pressure setting value, according to measuring unit 11 transmit come tach signal, temperature signal, exhaust steam pressure
Signal and valve position signal send speed controling signal, exhaust steam pressure control signal, special operation condition and control signal to execution unit.
Specifically, control unit 12 includes process control computer and corresponding control software.
Execution unit 13 is connected with control unit 12, including being mended into vapour pitch, steam discharge ventilation valve, steam discharge overflow valve and steam discharge
Steam valve, for the speed controling signal, exhaust steam pressure control signal, special operation condition control signal sent according to control unit 12
Perform corresponding operation.
Specifically, control unit 12 performs following control operation：
(1) setting of exhaust steam pressure setting value
Exhaust steam pressure setting value has certain value range.According to operating modes different in operation, corresponding row is automatically given
Steam pressure setting value, it is specific as follows：
A) in steam extraction back pressure feed pump turbine startup stage, the excision of exhaust steam pressure controller, ventilation valve opening, by steam discharge
Drain into condenser.
B) when rotating speed reaches pump work rotating speed (band revolution speed), exhaust steam pressure controller input, ventilation valve progressively closes off,
Exhaust steam pressure is established, exhaust steam pressure setting value tracking actual value, filling valve and overflow valve are all failure to actuate at this time.
C) steam extraction back pressure feed pump turbine normally band pump operation when, such as then reduced more than ceiling value into vapour pitch aperture
Exhaust steam pressure setting value.
D) it is too low into vapour pitch aperture, then exhaust steam pressure setting value is improved, back pressure is increased, increases into vapour pitch aperture.
E) such as 6#, #7 low-pressure heater are cut off, and exhaust steam pressure is set in the upper limit of setting range.
F) exhaust steam pressure and #5 take out that pressure ratio is low and exhaust temperature is high, reduce exhaust steam pressure setting value.
(2) rotating speed controls
The actual speed signal for the steam turbine that rotational speed governor carrys out measuring unit transmission, will compared with speed setting value
Obtained deviation carries out operation by PID controller, and output flow instruction is arrived into vapour pitch valve positioner, to control into vapour tune
The aperture of door, and then the rotating speed of steam turbine is controlled, so as to control the throttle flow of steam turbine.
(3) exhaust steam pressure controls
The practical exhaust steam pressure signal for the steam turbine that exhaust steam pressure controller carrys out measuring unit transmission, sets with exhaust steam pressure
Definite value compares, by obtained deviation by PID controller carry out operation, output order to steam discharge filling valve, steam discharge overflow valve and
Steam discharge ventilation valve, to control the exhaust steam pressure of steam turbine.
Specifically, when exhaust steam pressure signal is less than exhaust steam pressure setting value, steam discharge overflow valve is turned down until fully closed；Steam discharge
After overflow valve is fully closed, steam discharge filling valve is opened.Steam discharge filling valve opening is passed through by exhaust steam pressure setting value and exhaust steam pressure signal
PI controllers automatically adjust.
When exhaust steam pressure signal is higher than exhaust steam pressure setting value, steam discharge filling valve is turned down until fully closed.Steam discharge filling valve
After fully closed, steam discharge overflow valve is opened, steam discharge overflow valve opening is controlled by the permission back pressure upper limit set and practical back pressure by PI
Device automatically adjusts.
(4) exhaust steam pressure adjusts steam turbine and contributes
By adjusting the exhaust steam pressure of Steam Turbine, it can adjust that Steam Turbine is different to be gone out under same throttle flow
Power, to meet the needs of Steam Turbine difference operating mode.
Specifically, when the load increase of Steam Turbine, in order to which rotating speed is maintained not turn off steam turbine greatly into vapour pitch,
If cannot still meet the power requirement of feedwater pump group into vapour pitch standard-sized sheet, gone out by reducing exhaust steam pressure with increasing steam turbine
Power.
In order to ensure the regulation performance of rotating speed, set if steam extraction back pressure feed pump turbine is more than into vapour pitch opening degree instruction
Definite value, then reduce exhaust steam pressure setting value, opens steam discharge overflow valve to reduce exhaust steam pressure, so as to reduce steam turbine into vapour
Amount, to increase the output of Steam Turbine to reserve enough surpluses into vapour pitch.
(5) special operation condition controls
In unit special operation condition, such as heater excision, RB operating modes, fast and stable rotating speed is needed, prevents feed temperature from sending out
Raw big variation, causes boiler shutdown.
Specifically, special operation condition adds excision and #7 high to add excision including #6 high.
After #6 high adds excision, the steam discharge of #6 steam extractions will be cut off, and exhaust steam pressure has moment raising, and at this moment ventilation valve is instantaneously opened
It opens, steam extraction back pressure feed pump turbine steam discharge to condenser, is latched steam discharge filling valve and steam discharge overflow valve；It is delayed certain time
Afterwards, exhaust steam pressure drops to normal value.If desired, small bypass valve can also be turned off manually, steam discharge overflow valve will be gradually opened, one
Part vapour enter #7 it is low plus.Meanwhile be adjusted correspondingly into vapour pitch aperture, to maintain rotating speed constant.
After #7 high adds excision, #6 it is low plus need steam consumption will increase, at this moment steam discharge overflow valve as open, then immediately locking close
Valve closing door；Exhaust steam pressure is maintained by opening steam discharge filling valve, meets 6# low the needs of adding.Meanwhile exhaust steam pressure is set
Value is set in lower limit, to reduce filling flow.
With reference to Fig. 3, the control method of steam extraction back pressure feed pump turbine of the invention includes the following steps：
Step S1, tach signal needed for steam turbine control, temperature signal, exhaust steam pressure signal and into vapour pitch valve are measured
Position signal.
Step S2, exhaust steam pressure setting value is set, according to tach signal, temperature signal, exhaust steam pressure signal and into vapour tune
Door valve position signal sends speed controling signal, exhaust steam pressure control signal and special operation condition control signal.
Step S3, according to speed controling signal, exhaust steam pressure control signal, special operation condition control signal by into vapour pitch,
Steam discharge ventilation valve, steam discharge overflow valve and steam discharge filling valve perform corresponding operation.
Specifically, step S2 performs following control operation：
(1) setting of exhaust steam pressure setting value
Exhaust steam pressure setting value has certain value range.According to operating modes different in operation, corresponding row is automatically given
Steam pressure setting value, it is specific as follows：
A) in steam extraction back pressure feed pump turbine startup stage, the excision of exhaust steam pressure controller, ventilation valve opening, by steam discharge
Drain into condenser.
B) when rotating speed reaches pump work rotating speed (band revolution speed), exhaust steam pressure controller input, ventilation valve progressively closes off,
Exhaust steam pressure is established, exhaust steam pressure setting value tracking actual value, filling valve and overflow valve are all failure to actuate at this time.
C) steam extraction back pressure feed pump turbine normally band pump operation when, such as then reduced more than ceiling value into vapour pitch aperture
Exhaust steam pressure setting value.
D) it is too low into vapour pitch aperture, then exhaust steam pressure setting value is improved, back pressure is increased, increases into vapour pitch aperture.
E) such as 6#, #7 low-pressure heater are cut off, and exhaust steam pressure is set in the upper limit of setting range.
F) exhaust steam pressure and #5 take out that pressure ratio is low and exhaust temperature is high, reduce exhaust steam pressure setting value.
(2) rotating speed controls
By the actual speed signal of the steam turbine of measurement, compared with speed setting value, obtained deviation is passed through into PID control
Device carries out operation, and output flow instruction is arrived into vapour pitch valve positioner, to control the aperture into vapour pitch, and then controls steamer
The rotating speed of machine, so as to control the throttle flow of steam turbine.
(3) exhaust steam pressure controls
By the practical exhaust steam pressure signal of the steam turbine of measurement, compared with exhaust steam pressure setting value, obtained deviation is led to
It crosses PID controller and carries out operation, output order is to steam discharge filling valve, steam discharge overflow valve and steam discharge ventilation valve, to control steam turbine
Exhaust steam pressure.
Specifically, when exhaust steam pressure signal is less than exhaust steam pressure setting value, steam discharge overflow valve is turned down until fully closed；Steam discharge
After overflow valve is fully closed, steam discharge filling valve is opened.Steam discharge filling valve opening is passed through by exhaust steam pressure setting value and exhaust steam pressure signal
PI controllers automatically adjust.
When exhaust steam pressure signal is higher than exhaust steam pressure setting value, steam discharge filling valve is turned down until fully closed.Steam discharge filling valve
After fully closed, steam discharge overflow valve is opened, steam discharge overflow valve opening is controlled by the permission back pressure upper limit set and practical back pressure by PI
Device automatically adjusts.
(4) exhaust steam pressure adjusts steam turbine and contributes
By adjusting the exhaust steam pressure of Steam Turbine, it can adjust that Steam Turbine is different to be gone out under same throttle flow
Power, to meet the needs of Steam Turbine difference operating mode.
Specifically, when the load increase of Steam Turbine, in order to which rotating speed is maintained not turn off steam turbine greatly into vapour pitch,
If cannot still meet the power requirement of feedwater pump group into vapour pitch standard-sized sheet, gone out by reducing exhaust steam pressure with increasing steam turbine
Power.
In order to ensure the regulation performance of rotating speed, set if steam extraction back pressure feed pump turbine is more than into vapour pitch opening degree instruction
Definite value, then reduce exhaust steam pressure setting value, opens steam discharge overflow valve to reduce exhaust steam pressure, so as to reduce steam turbine into vapour
Amount, to increase the output of Steam Turbine to reserve enough surpluses into vapour pitch.
(5) special operation condition controls
In unit special operation condition, such as heater excision, RB operating modes, fast and stable rotating speed is needed, prevents feed temperature from sending out
Raw big variation, causes boiler shutdown.
Specifically, special operation condition adds excision and #7 high to add excision including #6 high.
After #6 high adds excision, the steam discharge of #6 steam extractions will be cut off, and exhaust steam pressure has moment raising, and at this moment ventilation valve is instantaneously opened
It opens, steam extraction back pressure feed pump turbine steam discharge to condenser, is latched steam discharge filling valve and steam discharge overflow valve；It is delayed certain time
Afterwards, exhaust steam pressure drops to normal value.If desired, small bypass valve can also be turned off manually, steam discharge overflow valve will be gradually opened, one
Part vapour enter #7 it is low plus.Meanwhile be adjusted correspondingly into vapour pitch aperture, to maintain rotating speed constant.
After #7 high adds excision, #6 it is low plus need steam consumption will increase, at this moment steam discharge overflow valve as open, then immediately locking close
Valve closing door；Exhaust steam pressure is maintained by opening steam discharge filling valve, meets 6# low the needs of adding.Meanwhile exhaust steam pressure is set
Value is set in lower limit, to reduce filling flow.
With reference to Fig. 4, steam turbine of the invention includes steam extraction back pressure feed pump turbine ontology 2, with steam extraction back pressure feed pump
The control system 1 of above-mentioned steam extraction back pressure feed pump turbine that turbine body is connected, to pass through the control of steam extraction back pressure feed pump
System processed controls steam extraction back pressure feed pump ontology.
In conclusion the control system and control method, steam turbine of the steam extraction back pressure feed pump turbine of the present invention are in vapour
In turbine operational process, disclosure satisfy that the requirement of boiler feedwater rotating speed, also disclosure satisfy that steam extraction, steam discharge to heater requirement；
It ensure that the flexible modulation to rotating speed.So the present invention effectively overcomes various shortcoming of the prior art and has high industrial
Utility value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (10)
1. a kind of control system of steam extraction back pressure feed pump turbine, it is characterised in that：Including measuring unit, control unit and hold
Row unit；
The measuring unit is used to measuring tach signal needed for steam turbine control, temperature signal, exhaust steam pressure signal and into vapour
Pitch valve position signal；
Described control unit is connected with the measuring unit, including exhaust steam pressure setting module, rotational speed governor, exhaust steam pressure control
Device processed, for setting exhaust steam pressure setting value, according to the measuring unit transmit come tach signal, temperature signal, steam discharge pressure
Force signal and into vapour pitch valve position signal send speed controling signal, exhaust steam pressure control signal, special operation condition control signal extremely
Execution unit；
The execution unit is connected with described control unit, including being mended into vapour pitch, steam discharge ventilation valve, steam discharge overflow valve and steam discharge
Steam valve, for the speed controling signal, exhaust steam pressure control signal, special operation condition control letter sent according to described control unit
Number perform corresponding operation.
2. the control system of steam extraction back pressure feed pump turbine according to claim 1, it is characterised in that：The rotating speed control
Device processed compares the tach signal that measuring unit transmission comes with speed setting value, and the deviation of the two is passed through PID control
Device carries out operation, and output flow is instructed into vapour pitch valve positioner, to control the rotating speed of steam turbine.
3. the control system of steam extraction back pressure feed pump turbine according to claim 1, it is characterised in that：The steam discharge pressure
Force controller compares the exhaust steam pressure signal that measuring unit transmission comes with exhaust steam pressure setting value, by the deviation of the two
Operation is carried out by PID controller, output order is to steam discharge filling valve, steam discharge overflow valve and steam discharge ventilation valve, to control steamer
The exhaust steam pressure of machine.
4. the control system of steam extraction back pressure feed pump turbine according to claim 4, it is characterised in that：
When exhaust steam pressure signal is less than exhaust steam pressure setting value, steam discharge overflow valve is turned down up to fully closed, and in steam discharge overflow valve
Steam discharge filling valve is opened after fully closed；
When exhaust steam pressure signal is higher than exhaust steam pressure setting value, steam discharge filling valve is turned down up to fully closed, and in steam discharge filling valve
Steam discharge overflow valve is opened after fully closed.
5. the control system of steam extraction back pressure feed pump turbine according to claim 1, it is characterised in that：When steam extraction back pressure
Feed pump turbine into vapour pitch opening degree instruction be more than setting value when, reduce exhaust steam pressure setting value, open steam discharge overflow valve
To reduce exhaust steam pressure.
6. a kind of control method of steam extraction back pressure feed pump turbine, it is characterised in that：Include the following steps：
Measure tach signal needed for steam turbine control, temperature signal, exhaust steam pressure signal and into vapour pitch valve position signal；
Set exhaust steam pressure setting value, according to tach signal, temperature signal, exhaust steam pressure signal and into vapour pitch valve position signal send out
Send speed controling signal, exhaust steam pressure control signal and special operation condition control signal；
According to speed controling signal, exhaust steam pressure control signal, special operation condition control signal by into vapour pitch, steam discharge ventilation valve,
Steam discharge overflow valve and steam discharge filling valve perform corresponding operation.
7. the control method of steam extraction back pressure feed pump turbine according to claim 6, it is characterised in that：By turning for measurement
Fast signal carries out operation compared with speed setting value, by the deviation of the two by PID controller, and output flow is instructed into vapour
Pitch valve positioner, to control the rotating speed of steam turbine.
8. the control method of steam extraction back pressure feed pump turbine according to claim 6, it is characterised in that：By the row of measurement
Vapour pressure force signal carries out operation compared with exhaust steam pressure setting value, by the deviation of the two by PID controller, and output order arrives
Steam discharge filling valve, steam discharge overflow valve and steam discharge ventilation valve, to control the exhaust steam pressure of steam turbine.
9. the control method of steam extraction back pressure feed pump turbine according to claim 8, it is characterised in that：
When exhaust steam pressure signal is less than exhaust steam pressure setting value, steam discharge overflow valve is turned down up to fully closed, and in steam discharge overflow valve
Steam discharge filling valve is opened after fully closed；
When exhaust steam pressure signal is higher than exhaust steam pressure setting value, steam discharge filling valve is turned down up to fully closed, and in steam discharge filling valve
Steam discharge overflow valve is opened after fully closed.
10. a kind of steam turbine, it is characterised in that：Including steam extraction back pressure feed pump turbine ontology, feed water with the steam extraction back pressure
The control system of steam extraction back pressure feed pump turbine described in one of claim 1-5 that pump turbine body is connected, the pumping
The control system of vapour back pressure feed pump is used to control the steam extraction back pressure feed pump ontology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611217159.4A CN108240238B (en) | 2016-12-26 | 2016-12-26 | Control system and control method for steam turbine of extraction back pressure water feeding pump and steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611217159.4A CN108240238B (en) | 2016-12-26 | 2016-12-26 | Control system and control method for steam turbine of extraction back pressure water feeding pump and steam turbine |
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| CN108240238A true CN108240238A (en) | 2018-07-03 |
| CN108240238B CN108240238B (en) | 2020-11-24 |
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| CN201611217159.4A Active CN108240238B (en) | 2016-12-26 | 2016-12-26 | Control system and control method for steam turbine of extraction back pressure water feeding pump and steam turbine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109184818A (en) * | 2018-08-08 | 2019-01-11 | 浙江汽轮成套技术开发有限公司 | A kind of back pressure turbine blade protection method based on turbine regulating system |
| CN109356675A (en) * | 2018-12-13 | 2019-02-19 | 浙江医药高等专科学校 | Automatic start control method of feed pump steam turbine |
| CN110159365A (en) * | 2019-06-12 | 2019-08-23 | 中国能源建设集团广东省电力设计研究院有限公司 | A kind of sequence starting method of the small steam turbine of two-shipper backheat |
| CN110894797A (en) * | 2019-11-06 | 2020-03-20 | 大唐郓城发电有限公司 | A steam extraction back pressure feed pump steam turbine unit system and operation method |
| CN113374539A (en) * | 2021-06-09 | 2021-09-10 | 攀钢集团攀枝花钢钒有限公司 | Steam inlet control system of double-cylinder double-pressure waste heat generating set and steam supplementing control method thereof |
| CN113513376A (en) * | 2021-04-30 | 2021-10-19 | 华电漯河发电有限公司 | Back pressure machine motor coaxial dual drive control system and control method |
| CN114017146A (en) * | 2021-10-29 | 2022-02-08 | 华能秦煤瑞金发电有限责任公司 | Method for starting double-machine regenerative small steam turbine without electric pump and carrying load |
| CN114687822A (en) * | 2020-12-25 | 2022-07-01 | 上海电气电站设备有限公司 | Control system and control method of steam turbine |
| CN115234310A (en) * | 2022-08-26 | 2022-10-25 | 西安热工研究院有限公司 | BEST small steam turbine pre-warming starting control system |
| CN115387863A (en) * | 2022-08-26 | 2022-11-25 | 西安热工研究院有限公司 | BEST small steam turbine steam admission governing valve control system based on automatic undisturbed switching of multiplex condition |
| CN115434764A (en) * | 2022-09-13 | 2022-12-06 | 西安热工研究院有限公司 | Overflow valve adjusting and controlling system applied to BEST small steam turbine |
| CN115788602A (en) * | 2021-09-10 | 2023-03-14 | 上海电气电站设备有限公司 | Back pressure control thermodynamic system and control method for water supply pump steam turbine |
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| CN109184818A (en) * | 2018-08-08 | 2019-01-11 | 浙江汽轮成套技术开发有限公司 | A kind of back pressure turbine blade protection method based on turbine regulating system |
| CN109356675A (en) * | 2018-12-13 | 2019-02-19 | 浙江医药高等专科学校 | Automatic start control method of feed pump steam turbine |
| CN109356675B (en) * | 2018-12-13 | 2021-10-22 | 浙江医药高等专科学校 | Automatic start control method of feed pump steam turbine |
| CN110159365A (en) * | 2019-06-12 | 2019-08-23 | 中国能源建设集团广东省电力设计研究院有限公司 | A kind of sequence starting method of the small steam turbine of two-shipper backheat |
| CN110159365B (en) * | 2019-06-12 | 2021-07-30 | 中国能源建设集团广东省电力设计研究院有限公司 | Sequence control starting method of double-machine regenerative small steam turbine |
| CN110894797A (en) * | 2019-11-06 | 2020-03-20 | 大唐郓城发电有限公司 | A steam extraction back pressure feed pump steam turbine unit system and operation method |
| CN114687822A (en) * | 2020-12-25 | 2022-07-01 | 上海电气电站设备有限公司 | Control system and control method of steam turbine |
| CN114687822B (en) * | 2020-12-25 | 2024-08-02 | 上海电气电站设备有限公司 | Control system and control method for steam turbine |
| CN113513376A (en) * | 2021-04-30 | 2021-10-19 | 华电漯河发电有限公司 | Back pressure machine motor coaxial dual drive control system and control method |
| CN113374539A (en) * | 2021-06-09 | 2021-09-10 | 攀钢集团攀枝花钢钒有限公司 | Steam inlet control system of double-cylinder double-pressure waste heat generating set and steam supplementing control method thereof |
| CN115788602A (en) * | 2021-09-10 | 2023-03-14 | 上海电气电站设备有限公司 | Back pressure control thermodynamic system and control method for water supply pump steam turbine |
| CN114017146A (en) * | 2021-10-29 | 2022-02-08 | 华能秦煤瑞金发电有限责任公司 | Method for starting double-machine regenerative small steam turbine without electric pump and carrying load |
| CN114017146B (en) * | 2021-10-29 | 2023-10-31 | 华能秦煤瑞金发电有限责任公司 | No-electric pump starting load method for double-engine regenerative small steam turbine |
| CN115387863A (en) * | 2022-08-26 | 2022-11-25 | 西安热工研究院有限公司 | BEST small steam turbine steam admission governing valve control system based on automatic undisturbed switching of multiplex condition |
| CN115234310B (en) * | 2022-08-26 | 2024-02-06 | 西安热工研究院有限公司 | Pre-heating starting control system of BEST small steam turbine |
| CN115387863B (en) * | 2022-08-26 | 2024-05-07 | 西安热工研究院有限公司 | BEST small steam turbine inlet valve control system based on multi-condition automatic and disturbance-free switching |
| CN115234310A (en) * | 2022-08-26 | 2022-10-25 | 西安热工研究院有限公司 | BEST small steam turbine pre-warming starting control system |
| CN115434764A (en) * | 2022-09-13 | 2022-12-06 | 西安热工研究院有限公司 | Overflow valve adjusting and controlling system applied to BEST small steam turbine |
| CN115434764B (en) * | 2022-09-13 | 2025-04-25 | 西安热工研究院有限公司 | Overflow valve control system for BEST small steam turbine |
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