CN106368746A - Self-starting control method of steam turbine - Google Patents
Self-starting control method of steam turbine Download PDFInfo
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- CN106368746A CN106368746A CN201610900088.1A CN201610900088A CN106368746A CN 106368746 A CN106368746 A CN 106368746A CN 201610900088 A CN201610900088 A CN 201610900088A CN 106368746 A CN106368746 A CN 106368746A
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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
- F01D19/00—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith
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Abstract
The invention discloses a self-starting control method of a steam turbine. The self-starting control method comprises the specific steps that (1) automatic latch-on operation is achieved; (2) automatic operating is achieved; (3) the target rotating speed is automatically set to be 500 r/min; (4) 500 r/min friction checking is achieved; (5) the target rotating speed is automatically set to be 2,000 r/min; (6) 2,000 r/min medium-speed warming is achieved; (7) the target rotating speed is automatically set to be 2,900 r/min; (8) valve switching is automatically carried out; (9) the target rotating speed is automatically set to be 3,000 r/min; and (10) checking is completed through ATC. According to the self-starting control method, automatic control of the domestic steam turbine in the whole process from automatic latch-on operation, operating, friction checking, medium-speed warming and valve switching to increasing to the rated rotating speed is achieved, manual intervention is not needed, and the labor intensity of operating personnel is relieved; in the self-starting process, automatic prioritizing between the life loss and the starting time of the steam turbine can be achieved; and a good promotion function is achieved on the automatic control level of the steam turbine and APS application.
Description
Technical field
The present invention relates to steam turbine automatic control technology field is and in particular to a kind of domestic steam turbine self-starting control
Method processed.
Background technology
Automatically steam turbine control (automation turbine control, atc) technology refers to that steam turbine is capable of
The whole-process automatic control process of unit initial load from extension lock to raising speed to rated speed or band.Steam in domestic super (super-) critical
In steam turbine control system, it is allowed to supporting control system except Shanghai steam turbine plant company limited uses for reference Siemens's technology
Have outside self-starting function, the control system of other steam turbine plants does not have this function；Or simply devise this Xiang Gong
Can, but due to being limited by China's early stage fired power generating unit automatization level development degree and external atc technological assimilation absorbed
Deficiency is so that the atc technology introduced can not be applied in practice.
Aps (automatic power plant starup and shut-down system, aps) is in recent years to flare up
One important directions of group of motors development, it can improve the correctness of fired power generating unit shutdown process and standardization, mitigate and run
The labor intensity of personnel, shortens the Unit Commitment time, is to improve the effective approach of unit automation level.Wherein, atc is
One of aps important component part.Say in a sense, whether the steam turbine control system that unit is configured possesses atc
Function, is the key factor that can aps realize.
Content of the invention
The technical problem to be solved in the present invention is, for the defect of prior art presence, there is provided a kind of steam turbine is opened certainly
Dynamic control strategy, the method be capable of steam turbine from automatic hang lock, operations, rub inspection, medium-speed warming, to carry out Vavle switching straight
To the whole-process automatic control function of rising to rated speed, decrease the operation of operations staff, improve the automatization level of unit.
A kind of steam turbine booting-self controller method, comprises the following steps:
Step 1: according to each component signal of steam turbine and atc working method signal, lock signal is hung in execution；
Step 2: when steam turbine completes to hang lock, and turning motor has been started up or steam turbine rotating speed is more than minimum setting
During value, execute steam turbine run signal；
Step 3: after steam turbine runs, execution setting rotating speed of target is 500r/min signal；
Step 4: according to " needing friction to check " button signal, execution " 500r/min friction checks " instruction；
Step 5: when " need friction check " button do not put into and steam turbine rotating speed be located at 490r/min-510r/min it
Between when, execution setting rotating speed of target be 2000r/min signal, enter step 6；
When " needing friction to check " button puts into and steam turbine rotating speed is located between 490r/min-510r/min, hold
Row steam turbine trip signal, and return to step 1；
Step 6: execute 2000r/min medium-speed warming according to rotating speed of target and given rotating speed；
Given rotating speed is the rotating speed of setting, and it is close to rotating speed of target that given rotating speed rises speed according to the steam turbine setting.
Step 7: according to warming-up execution time and steam turbine rotating speed, execution setting rotating speed of target is 2900r/min signal；
Step 8: when given rotating speed is equal to 2900r/min, execution Vavle switching instruction；
Step 9: after the completion of Vavle switching, execution setting rotating speed of target is 3000r/min signal；
Step 10: execution " atc completes to check " instruction, until steam turbine actual speed is in 2995r/min～3005r/
Between min.
Preferably, before in described step 1, lock signal is hung in execution, each component signal of steam turbine and atc mode at least should
Meet following condition:
1. steam turbine is tripped；2. lubricating oil system is normal；3. eh oil system is normal；4. all valves are fully closed；5. own
Drain valve is fully closed；6. big warning without acceptance of persons；7. the no big warning of the vaporium inside and outside wall metal temperature difference；8. no High-and-medium Pressure Outer Casing is golden up and down
Belong to the big warning of the temperature difference；9. low pressure (LP) cylinder exhaust temperature is normal；10. atc working method signal enabling.
Preferably, manually button carries out manual confirmation to whether choosing of atc working method.
When selecting " atc mode ", steam turbine control system adopts self-starting mode；When " atc mode " be not selected,
Steam turbine control mode is still ordinary operation mode.
In order to increase the safety and reliability of steam turbine self-starting control system, it is provided with " starting atc " manual confirmation
Button.When above entry condition all meets, click on " starting atc " button, steam turbine control system will execute automatically " to be hung
Lock " instructs.
Beneficial effect
The invention provides a kind of domestic steam turbine booting-self controller method, basic step includes: 1) automatically hangs lock；2)
Automatic running；3) automatically put rotating speed of target 500r/min；4) 500r/min friction checks；5) automatically put rotating speed of target 2000r/
min；6) 2000r/min medium-speed warming；7) automatically put rotating speed of target 2900r/min；8) automatically carry out Vavle switching；9) automatically put mesh
Mark rotating speed 3000r/min；10) atc completes to check.Whole control process is whole-course automation, easy to use；
Compared to prior art, have an advantage that
1. the present invention can realize domestic steam turbine from automatic lock, operation, friction inspection, the medium-speed warming hung until rising
To the whole-process automatic control of rated speed, without manual intervention, alleviate the labor intensity of operations staff；2. certainly open in steam turbine
During dynamic, atc by voluntarily being judged to the state of steam turbine (as steam turbine cold-hot condition, whether be critical turn
Fast region etc.), the warm-up period of steam turbine and liter speed can be arranged automatically, in life consumption and the startup of steam turbine
Reach between time automatically preferentially；3. atc is as the important component part in aps, can aps be realized have most important
Effect.Therefore, the present invention has good progradations for the practical application of steam turbine Automated condtrol and aps.
In the present invention, steam turbine rotating speed of target is progressively to set to maximum speed, such as put rotating speed of target 500r/min,
Put rotating speed of target 2000r/min, put rotating speed of target 2900r/min, put rotating speed of target 3000r/min etc., be not similar existing
Steam turbine atc system in setting just put first target be maximum speed, so can reduce the wind in steam turbine start-up course
Dangerous；In addition, " suspending atc " button also setting up in the atc system of the present invention, when physical condition is unsatisfactory for or undesirable, need
When wanting atc program stopped, can click on, atc will keep the current sequence that walks no longer to carry out；Recover atc when condition meets needs
During program, then click on, atc step sequence will execute automatically.
In the present invention, atc, due to being not required to want manual operation, therefore decreases the manual operation time.If do not comprised warm-up period
Including, the atc start-up course in the present invention is about 10 minutes, and the more conventional manually-operated time is short.
In the present invention, a plurality of atc is provided with according to steam turbine feature and starts permissive condition, all full when starting permissive condition
Just can perform atc step sequence when sufficient, have preferable protective effect in itself therefore for steam turbine.In atc start-up course, steam turbine
Bias, bearing temperature, absolute expansion, axle shake, the important parameter such as axial displacement all can reach good index, to a certain extent
Extend the service life of steam turbine.
Brief description
Fig. 1 is the basic step schematic flow sheet of the embodiment of the present invention one；
Fig. 2 is the embodiment of the present invention one process trendgram；
Fig. 3 is the basic step schematic flow sheet of the embodiment of the present invention two；
Fig. 4 is that the application present invention carries out automatic control process schematic diagram to steam turbine；
Fig. 5 is that the application present invention carries out indices schematic diagram in automatic control process to steam turbine.
Specific embodiment
Below in conjunction with drawings and Examples, the present invention is described further.
As shown in figure 1, a kind of steam turbine booting-self controller method, comprise the following steps:
Step 1: according to each component signal of steam turbine and atc working method signal, lock signal is hung in execution；
Step 2: when steam turbine completes to hang lock, and turning motor has been started up or steam turbine rotating speed is more than minimum setting
During value, execute steam turbine run signal；
Step 3: after steam turbine runs, execution setting rotating speed of target is 500r/min signal；
Step 4: according to " needing friction to check " button signal, execution " 500r/min friction checks " instruction；
Step 5: when " need friction check " button do not put into and steam turbine rotating speed be located at 490r/min-510r/min it
Between when, execution setting rotating speed of target be 2000r/min signal, enter step 6；
When " needing friction to check " button puts into and steam turbine rotating speed is located between 490r/min-510r/min, hold
Row steam turbine trip signal, and return to step 1；
Step 6: execute 2000r/min medium-speed warming according to rotating speed of target and given rotating speed；
Given rotating speed is the rotating speed of setting, and it is close to rotating speed of target that given rotating speed rises speed according to the steam turbine setting.
Step 7: according to warming-up execution time and steam turbine rotating speed, execution setting rotating speed of target is 2900r/min signal；
Step 8: when given rotating speed is equal to 2900r/min, execution Vavle switching instruction；
Step 9: after the completion of Vavle switching, execution setting rotating speed of target is 3000r/min signal；
Step 10: execution " atc completes to check " instruction, until steam turbine actual speed is in 2995r/min～3005r/
Between min.
Embodiment one:
As depicted in figs. 1 and 2, the present embodiment application produces for Harbin Turbine Factory Co., Ltd.
630mw supercritical pressure turbine, the step of its booting-self controller method includes:
1) automatically hang lock；
2) automatic running；
3) automatically put rotating speed of target 500r/min；
4) 500r/min friction checks；
5) automatically put rotating speed of target 2000r/min；
6) 2000r/min medium-speed warming；
7) automatically put rotating speed of target 2900r/min；
8) automatically carry out Vavle switching；
9) automatically put rotating speed of target 3000r/min；
10) atc completes to check.
Preferably, described step 1) when needing to meet following entry condition, steam turbine control system " automatically hanging lock " instruction
Can execute: 1. steam turbine is tripped；2. lubricating oil system is normal；3. eh oil system is normal；4. all valves are fully closed；5. institute
There is drain valve fully closed；6. big warning without acceptance of persons；7. the no big warning of the vaporium inside and outside wall metal temperature difference；8. no High-and-medium Pressure Outer Casing is upper and lower
The big warning of the metal temperature difference；9. low pressure (LP) cylinder exhaust temperature is normal；10. atc mode.
Step 1) " atc mode " in entry condition carry out manual confirmation using hand push button.When selection " atc mode "
When, steam turbine control mode adopts self-starting function；When " atc mode " be not selected, steam turbine control mode is conventional behaviour
Make mode.
In order to increase the safety and reliability of steam turbine self-starting control system, it is provided with " starting atc " manual confirmation
Button.When above entry condition all meets, click on " starting atc " button, steam turbine control system will execute extension lock automatically
Instruction.
Step 1) the condition criterion that completes is: steam turbine hangs lock, and middle main door standard-sized sheet.
Preferably, described step 2) need to meet following entry condition, steam turbine control system " automatic running " instruction is
It is able to carry out: 1. atc mode；2. steam turbine hangs lock, and middle main door standard-sized sheet；3. turning motor has been turned on or turbine speed is more than
100r/min；
Step 2) the condition criterion that completes is: steam turbine is run, high pitch standard-sized sheet.
Preferably, described step 3) need to meet following entry condition, steam turbine control system " puts rotating speed of target 500r/
Min " instruction can execute: 1. atc mode；2. steam turbine just runs (steam turbine has run 45s pulse signal) 3. high pitch
Standard-sized sheet；
Step 3) the condition criterion that completes is: steam turbine rotating speed of target is equal to 500r/min.
Preferably, described step 4) need to meet following entry condition, steam turbine control system " 500r/min friction inspection
Look into " instruct and can execute: 1. 0r/min < turbine speed < 500r/min；2. button puts into " to need friction to check "." need
Rub inspection " button is defaulted as exiting state, and steam turbine needs to carry out when friction checks by manually putting into.
Additionally, carrying out in boosting velocity procedure in steam turbine, rising speed and automatically being preset according to the state of steam turbine, after presetting
Also can be by manually modifying.The condition adjudgement of steam turbine and the default speed that rises are: 1. cold conditions (first order metal temperature ＜ 120
DEG C), presetting and rising speed is 50r/min2；2. warm state (415 DEG C of 120 DEG C≤first order metal temperature ＜), presetting liter speed is
100r/min2；Hot (450 DEG C of 415 DEG C≤first order metal temperature ＜), presetting and rising speed is 150r/min2；Very hot state (450
DEG C≤first order metal temperature): the default speed that rises is 150r/min2；
Described step 4) the condition criterion that completes is: " needing friction to check " does not put into and 490r/min < turbine speed <
510r/min or steam turbine tripping operation；
Preferably, described step 5) need to meet following entry condition, steam turbine control system " puts rotating speed of target 2000r/
Min " instruction can execute: 490r/min < turbine speed < 510r/min；
Described step 5) the condition criterion that completes is: steam turbine rotating speed of target is equal to 2000r/min；
Preferably, described step 6) need to meet following entry condition, " 2000r/min middling speed warms up steam turbine control system
Machine " instruction can execute: 1. rotating speed of target is equal to 2000r/min；2. given rotating speed is in 1980～2000r/min；Additionally,
" warming-up " is defaulted as input state, and warm-up period is preset as: 1. cold conditions: 150min；2. warm state: 90min；3. hot: 0min；④
Very hot state: 0min；This warm-up period also can be by manually arranging.
Described step 6) the condition criterion that completes is；The warm-up period of setting has arrived or has manually cancelled warming-up.
Preferably, described step 7) need to meet following entry condition, steam turbine control system " puts rotating speed of target 2900r/
Min " instruction can execute: 1990r/min < turbine speed < 2010r/min
Preferably, described step 7) the condition criterion that completes is: rotating speed of target is equal to 2900r/min；
Preferably, described step 8) need to meet following entry condition, steam turbine control system " carrying out Vavle switching " instructs
Can execute: 1. given rotating speed is equal to 2900r/min；2. valveless switching warning (right stop valve inside and outside wall metal temperature deviation
Greatly)；
Described step 8) the condition criterion that completes is: Vavle switching completes, and standard-sized sheet high main door coefficient is 1, standard-sized sheet high pitch system
Number is 0.
Preferably, described step 9) need to meet following entry condition, steam turbine control system " puts rotating speed of target 3000r/
Min " can execute: Vavle switching completes；
Described step 9) the condition criterion that completes is: rotating speed of target is equal to 3000r/min；
Preferably, described step 10) need to meet following entry condition, steam turbine control system " atc completes to check " is
It is able to carry out: 1. Vavle switching completes；2. rotating speed of target is equal to 3000r/min；
Described step 10) the condition criterion that completes is: steam turbine actual speed is between 2995r/min～3005r/min.
Embodiment two:
As shown in figure 3, the present embodiment is essentially identical with embodiment one, its difference is the steam turbine in the present embodiment is to breathe out
The 1000mw supercritical pressure turbine that your shore steam turbine plant Co., Ltd produces.Because it requires not examine in self-starting process
Consider the process checking that rubs that steam turbine is carried out, the step of its booting-self controller method includes:
1) automatically hang lock；
2) automatic running；
3) automatically put rotating speed of target 500r/min；
4) automatically put rotating speed of target 2000r/min；
5) 2000r/min medium-speed warming；
6) automatically put rotating speed of target 2900r/min；
7) automatically carry out Vavle switching；
8) automatically put rotating speed of target 3000r/min；
9) atc completes to check.
Preferably, described step 1) when needing to meet following entry condition, steam turbine control system " automatically hanging lock " instruction
Can execute: 1. steam turbine is tripped；2. lubricating oil system is normal；3. eh oil system is normal；4. all valves are fully closed；5. institute
There is drain valve fully closed；6. big warning without acceptance of persons；7. the no big warning of the vaporium inside and outside wall metal temperature difference；8. no High-and-medium Pressure Outer Casing is upper and lower
The big warning of the metal temperature difference；9. low pressure (LP) cylinder exhaust temperature is normal；10. atc mode；
Step 1) " atc mode " in entry condition carry out manual confirmation using hand push button.When selection " atc mode "
When, steam turbine control mode adopts self-starting function；When " atc mode " be not selected, steam turbine control mode is conventional behaviour
Make mode.
In order to increase the safety and reliability of steam turbine self-starting control system, it is provided with " starting atc " manual confirmation
Button.When above entry condition all meets, click on " starting atc " button, steam turbine control system will execute extension lock automatically
Instruction.
Step 1) the condition criterion that completes is: steam turbine hangs lock, and middle main door standard-sized sheet.
Preferably, described step 2) need to meet following entry condition, steam turbine control system " automatic running " instruction is
It is able to carry out: 1. atc mode；2. steam turbine hangs lock, and middle main door standard-sized sheet；3. turning motor has been turned on or turbine speed is more than
100r/min；
Step 2) the condition criterion that completes is: steam turbine is run, high pitch standard-sized sheet.
Preferably, described step 3) need to meet following entry condition, steam turbine control system " puts rotating speed of target 500r/
Min " instruction can execute: 1. atc mode；2. steam turbine just runs (steam turbine has run 45s pulse signal) 3. high pitch
Standard-sized sheet；
Step 3) the condition criterion that completes is: steam turbine rotating speed of target is equal to 500r/min.
Carry out in boosting velocity procedure in steam turbine, rise speed and automatically preset according to the state of steam turbine, also may be used after presetting
By manually modifying.The condition adjudgement of steam turbine and the default speed that rises are: 1. cold conditions (120 DEG C of first order metal temperature ＜),
The default speed that rises is 50r/min2；2. warm state (415 DEG C of 120 DEG C≤first order metal temperature ＜), presetting and rising speed is 100r/
min2；Hot (450 DEG C of 415 DEG C≤first order metal temperature ＜), presetting and rising speed is 150r/min2；Very hot state (450 DEG C≤
One-level metal temperature): the default speed that rises is 150r/min2；
Preferably, described step 4) need to meet following entry condition, steam turbine control system " puts rotating speed of target 2000r/
Min " instruction can execute: 490r/min < turbine speed < 510r/min；
Described step 4) the condition criterion that completes is: steam turbine rotating speed of target is equal to 2000r/min；
Preferably, described step 5) need to meet following entry condition, " 2000r/min middling speed warms up steam turbine control system
Machine " instruction can execute: 1. rotating speed of target is equal to 2000r/min；2. given rotating speed is in 1980～2000r/min；Additionally,
" warming-up " is defaulted as input state, and warm-up period is preset as: 1. cold conditions: 150min；2. warm state: 90min；3. hot: 0min；④
Very hot state: 0min；This warm-up period also can be by manually arranging.
Described step 5) the condition criterion that completes is；The warm-up period of setting has arrived or has manually cancelled warming-up.
Preferably, described step 6) need to meet following entry condition, steam turbine control system " puts rotating speed of target 2900r/
Min " instruction can execute: 1990r/min < turbine speed < 2010r/min
Described step 6) the condition criterion that completes is: rotating speed of target is equal to 2900r/min；
Preferably, described step 7) need to meet following entry condition, steam turbine control system " carrying out Vavle switching " instructs
Can execute: 1. given rotating speed is equal to 2900r/min；2. valveless switching warning (right stop valve inside and outside wall metal temperature deviation
Greatly)；
Described step 7) the condition criterion that completes is: Vavle switching completes, and standard-sized sheet high main door coefficient is 1, standard-sized sheet high pitch system
Number is 0.
Preferably, described step 8) need to meet following entry condition, steam turbine control system " puts rotating speed of target 3000r/
Min " can execute: Vavle switching completes；
Described step 8) the condition criterion that completes is: rotating speed of target is equal to 3000r/min；
Preferably, described step 9) need to meet following entry condition, steam turbine control system " atc completes to check " ability
Enough execution: 1. Vavle switching completes；2. rotating speed of target is equal to 3000r/min；
Described step 9) the condition criterion that completes is: steam turbine actual speed is between 2995r/min～3005r/min.
If do not comprised warm-up period, the automatic control process in the present invention is about 10 minutes, and certain atc opens
Dynamic process as shown in figure 4, the more conventional manually-operated time short.
In the present invention, a plurality of atc is provided with according to steam turbine feature and starts permissive condition, all full when starting permissive condition
Just can perform atc step sequence when sufficient, have preferable protective effect in itself therefore for steam turbine.In atc start-up course, steam turbine
Bias, bearing temperature, absolute expansion, axle shake, the important parameter such as axial displacement all can reach good index, to a certain extent
Extend the service life of steam turbine.In certain atc start-up course, indices are as shown in Figure 5.
Use above specific case is illustrated to the present invention, is intended merely to help those skilled in the art
It is well understood by.In the case of without departing from the spirit and scope of the present invention, the specific embodiment of the present invention can also be made
Various deductions, deformation and replacement.These changes and replacement all will fall in claims of the present invention limited range.
Claims (3)
1. a kind of steam turbine booting-self controller method is it is characterised in that comprise the following steps:
Step 1: according to each component signal of steam turbine and atc working method signal, lock signal is hung in execution；
Step 2: when steam turbine completes to hang lock, and turning motor has been started up or steam turbine rotating speed is more than minimum setting value
When, execute steam turbine run signal；
Step 3: after steam turbine runs, execution setting rotating speed of target is 500r/min signal；
Step 4: according to " needing friction to check " button signal, execution " 500r/min friction checks " instruction；
Step 5: button does not put into and steam turbine rotating speed is located between 490r/min-510r/min when " need to rub and check "
When, execution setting rotating speed of target is 2000r/min signal, enters step 6；
When " needing friction to check " button puts into and steam turbine rotating speed is located between 490r/min-510r/min, execute steaming
Steam turbine trip signal, and return to step 1；
Step 6: execute 2000r/min medium-speed warming according to rotating speed of target and given rotating speed；
Step 7: according to warming-up execution time and steam turbine rotating speed, execution setting rotating speed of target is 2900r/min signal；
Step 8: when given rotating speed is equal to 2900r/min, execution Vavle switching instruction；
Step 9: after the completion of Vavle switching, execution setting rotating speed of target is 3000r/min signal；
Step 10: execution " atc complete check " instruction, until steam turbine actual speed 2995r/min～3005r/min it
Between.
2. method according to claim 1 is it is characterised in that before in described step 1, lock signal is hung in execution, steam turbine is each
Component signal and atc mode at least should meet following condition:
1. steam turbine is tripped；2. lubricating oil system is normal；3. eh oil system is normal；4. all valves are fully closed；5. all hydrophobic
Valve is fully closed；6. big warning without acceptance of persons；7. the no big warning of the vaporium inside and outside wall metal temperature difference；8. the no upper and lower Metal Temperature of High-and-medium Pressure Outer Casing
Difference is big to report to the police；9. low pressure (LP) cylinder exhaust temperature is normal；10. atc working method signal enabling.
3. whether method according to claim 2 is it is characterised in that manually button choosing to atc working method
Carry out manual confirmation.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106968728A (en) * | 2017-04-28 | 2017-07-21 | 安徽新宁能源科技有限公司 | A kind of control method of unattended steam turbine |
| CN110344893A (en) * | 2019-07-18 | 2019-10-18 | 上海华电电力发展有限公司望亭发电分公司 | A kind of control method that steamer machine host porthole is opened |
| JP2020125737A (en) * | 2019-02-06 | 2020-08-20 | 三浦工業株式会社 | Steam system |
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| CN110344893B (en) * | 2019-07-18 | 2022-05-24 | 上海华电电力发展有限公司望亭发电分公司 | Control method for opening of steam turbine main engine valve |
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