CN106979035B - A kind of steam turbine profession debugging process risk pre-control method - Google Patents
A kind of steam turbine profession debugging process risk pre-control method Download PDFInfo
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- CN106979035B CN106979035B CN201710179301.9A CN201710179301A CN106979035B CN 106979035 B CN106979035 B CN 106979035B CN 201710179301 A CN201710179301 A CN 201710179301A CN 106979035 B CN106979035 B CN 106979035B
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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
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
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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
- 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
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Abstract
The present invention relates to a kind of steam turbine profession debugging process risk pre-control methods, it is characterised in that：Step successively includes:Job task in default steam turbine profession debugging process；Risk reference information is obtained according to preset job task；Risk classifications are determined according to risk reference information；Show risk classifications, and display control measure corresponding with risk classifications；Party A is received to instruct the confirmation for executing control measure；If confirmation instruction is correct, the risk classifications of display are eliminated, and eliminate the control measure corresponding with risk classifications of display.The present invention is by automatically obtaining corresponding job task in debugging process, risk that may be present is analyzed in the process, obtain relevant risk reference information, judge that risk whether there is, such as exist and provides risk corresponding control measure, so as to effectively control and avoid risk, it is ensured that the safety of the person and equipment in the normalization and debugging process of steam turbine profession debugging.
Description
Technical field
The present invention relates to a kind of steam turbine profession debugging process risk pre-control methods, belong to steam turbine profession safety control technology
Field.
Background technique
In the plant operation period of modernization, automation, the installation and debugging of electrical equipment become the important of enterprise development
Committed step.It directly affects the normal production and running of enterprise for enterprise.Therefore, each department of enterprise
It to be done as a long-term work；And each department will cooperate, and establish quality management system and personnel training
Scheme improves the responsibility consciousness and technical level of installation personnel by the guarantee of system and the training of technology.Equipment application training
Personnel will be attached most importance to equipment quality to be giveed training, and equipment management personnel is by establishing responsibility system of accountability and certain system of rewards and penalties
It improves the equipment safety management of employee and payes attention to level, only multi-party effort could improve the safety guarantee of business equipment, ability
Ensure the normal production running of enterprise.Under the reform tide of economic liftoff, our each enterprise will carry out electrical equipment
Installation and debugging efforts, and it is long-term, lasting carry out this element task, to guarantee the long term growth of enterprise.
Steam turbine is needed before formally putting into operation by branch, subsystem, a whole set of debugging, to ensure that steam turbine is formal
The stability and safety to work after putting into operation.At present, steam turbine debugging be usually by experienced technical staff according to
Its own experience is operated, the guidance in terms of the guidance and risk control that do not standardize, this just to commissioning staff propose compared with
High requirement also increases maloperation, manages the probability that the accidents such as not perfect occur.
Chinese patent 201510549528.9 discloses a kind of Risk Pre-control method during Boiler debugging, including default pot
Job task in furnace debugging process；Risk reference information is obtained according to the job task of selection；According to the risk with reference to letter
It ceases and determines risk classifications；Show the risk classifications and control measure corresponding with the risk classifications；User is received to described
The confirmation of the execution of control measure instructs, if confirmation instruction is correct, eliminate show the risk classifications and with the wind
The corresponding control measure of dangerous type.The patent can not be efficiently applied to steam turbine profession safety control technology field.
Summary of the invention
It is an object of the invention to overcome the above deficiencies in the existing technologies, and provide one kind can specification steam turbine it is special
Risk Pre-control method in industry debugging process.
The present invention solve the above problems used by technical solution be：A kind of pre- prosecutor of steam turbine profession debugging process risk
Method, it is characterised in that：Step successively includes:
1) job task in steam turbine profession debugging process is preset；2) risk is obtained with reference to letter according to preset job task
Breath；3) risk classifications are determined according to risk reference information；4) risk classifications, and display control corresponding with risk classifications are shown
Measure；5) Party A is received to instruct the confirmation for executing control measure；If confirmation instruction is correct, then the risk class of display is eliminated
Type, and eliminate the control measure corresponding with risk classifications of display；
Wherein, job task includes opening debugging mode；
Risk reference information includes one or more of following four information:Main vapour after rights state, steam turbine trip
Badge is puckery or pitch bite, interlock protection are not perfect；
When rights state is that permission does not pass through, permission is not risk of errors, risk of errors by determining risk classifications
Corresponding control measure are to ask verifying authorization and can not execute；
The risk classifications that main inlet throttle-stop valve bite or pitch bite determine after steam turbine trip are speed-regulating system risk, speed-regulating system wind
The corresponding control measure in danger are measure 1. to any one or several in 5.：
1. checking whether steam turbine revolving speed declines, boiler main fuel trip and generator off-the-line；
2. after steam turbine trip, discovery main inlet throttle-stop valve bite does not close all and when revolving speed rapid decrease, by orderly closedown progress
Processing；
3. after steam turbine trip, discovery main inlet throttle-stop valve bite is not closed when revolving speed being caused to increase all, vacuum is destroyed, is promptly stopped
Machine, stops vacuum pump operation, and boiler pressure release stops the operation of EH oil pump；
4. after steam turbine trip, if load not to zero, steam turbine still maintain 3000 revs/min, the non-off-the-line of generator, without inverse probability
Signal checks that steam turbine side is not put out a fire without obvious fault or boiler, then reduces main vapour pressure and reheat pressure, maintains minimum load fortune
Row contacts overhaul plan main inlet throttle-stop valve bite defect immediately；If electrical power generators power is inverse probability, then off-the-line generator, boiler
Manual MFT；
5. ascertaining the reason, can be restarted after handling main inlet throttle-stop valve bite defect；
The risk classifications of the not perfect determination of interlock protection are the degree of perfection risk that related cooperation profession satisfies the requirements, related
The corresponding control measure of degree of perfection risk that cooperation profession satisfies the requirements are to guarantee equipment and system connection before subsystem test run
Lock protection static test and dynamic test are correctly completed；
Risk classifications are that equipment does not have a whole set of entry condition：Unit main protection have any one it is abnormal；Unit is main
Detection instrument loses function for monitoring, influences unit and opens
Dynamic or normal operation, alternatively, the main monitoring parameters over-limit condition of unit；Operating system loses human-computer dialogue function
Energy；Host emergency overspeed governor regular event or any overspeed protection are unable to action message；The EH oil oil of host is unqualified, lubricates
Oil is unqualified, oil temperature is lower than 21 DEG C or fuel level in tank is low；Unit MCS system, FSSS system, DCS, DEH, TSI or ETS system
Work of uniting is abnormal, influences unit normal operation；Hp by-pass system control device or low-pressure bypass system control device are not just
Often, unit is influenced to operate normally and start；Any high pressure main inlet throttle-stop valve of steam turbine, pitch, steam extraction non-return flap, high row ventilation valve, height
It arranges non-return flap and bite occurs, cannot close tight；Barring gear is abnormal；TOP, MSP, EOP, EH oil pump, jacking(oil) pump failure
Or its corresponding interlock protection tests unqualified, sealing oil system failure；Permanent bending of rotor value and original value deviation are greater than 0.02mm；
Steam turbine differential expansion of HP casing >=10.3mm or steam turbine differential expansion of HP casing≤- 5.3mm, while the swollen difference >=19.8mm of low pressure (LP) cylinder；In steam turbine
Cylinder pressure the is swollen difference >=10.3mm or swollen poor≤- 5.3mm of steam turbine intermediate pressure cylinder, while the swollen difference >=19.8mm of low pressure (LP) cylinder；High pressure cylinder is warm up and down
Difference >=35 DEG C and intermediate pressure cylinder upper and lower temperature difference >=35 DEG C；Steam-water Quality is unqualified；Turbo-generator Set rotating part has obvious metal
Grating；Steam turbine water-inlet-proof protects system abnormal；Shaft seal steam is abnormal, keeps the temperature imperfect；Instrument is worked not just with gas system
Often, it cannot provide unit just common gas；Generator hydrogen purity is unqualified, humidity is unqualified or hydrogen cooler have it is different
Often；Generator Stator Cooling water conductivity is unqualified or Stator Condense Water System has other exceptions；Transformer unit insulation is unqualified；Hair
The main protection of any one of change group cannot normally be put into；Generator air-tight test is unqualified；Automatic voltage adjustor of power generator AVR work
Make abnormal.
Job task of the present invention includes low pressure (LP) cylinder exhaust temperature, and risk classifications are that low pressure (LP) cylinder exhaust temperature is high, low pressure (LP) cylinder row
The high corresponding control measure of stripping temperature include:Guarantee that condensed water water quality is good；Guarantee filter on low pressure cylinder spray desuperheat valve pipeline
Net is corresponding with the size of spray head in low pressure (LP) cylinder, avoids the blocking of spray head；During test run, in regular downtime, to low
The strainer of Attemperation water system and spray head are cleaned in cylinder pressure, guarantee the atomizing effect of spray head；In operation, low pressure (LP) cylinder steam discharge is monitored
Temperature first cleans the strainer of desuperheating water bypass and regulating valve when exhaust temperature reaches alarming value, guarantees impurity not
Into in desuperheat sprinkler head；Gate stop-start is beaten immediately when exhaust temperature reaches 121 DEG C of values；Guarantee low pressure cylinder spray and desuperheating water certainly
Dynamic regulating valve interlocking operates normally.
Risk classifications of the present invention include vapour leakage, and it is to check and fasten pipeline junction that vapour, which leaks corresponding control measure,
It is isolated at leakage.
Risk reference information of the present invention includes steam turbine hull-skin temperature and pipeline external surface temperature, when steam turbine hull-skin temperature
Or pipeline external surface temperature determines that risk classifications are Caution! Hot risk, Caution! Hot risk is corresponding when being greater than preset temperature value
Control measure be close installation system pipeline kept the temperature and worn high temperature protection articles, high temperature protection articles include heat-insulated
Gloves and safety goggles.
Job task of the present invention includes steam turbine operation, and risk reference information includes the following three types one of information or more
Kind:Bearing Temperature or vibration exceeding the standard, inspection work whether has carried out state and whether subsystem has run debugging shape
State；Bearing Temperature or vibration exceeding the standard determine that risk classifications are careful damage equipment Risk, careful to damage equipment Risk pair
The control measure answered are the operation of arrestment immediately, can just be put into operation again according to program after ascertaining the reason and being disposed；It patrols
It is not carry out the corresponding control measure of inspection when not carrying out inspection as prompt and carry out inspection that whether inspection work, which has carried out state,；Point
Whether system has run debugging mode be when not debugging subsystem do not debug the risk classifications that subsystem determines be debugging step not
Risk is improved, the corresponding control measure of the not perfect risk of debugging step are that prompt carries out subsystem debugging.
Job task of the present invention includes high altitude operation, and the corresponding risk reference information of high altitude operation includes whether to be equipped with safety
Carrier state；When whether being equipped with seat belt status to be not equipped with safety belt, determine that the risk classifications for being not equipped with safety belt are high-altitude
Falling risk, the corresponding control measure of falling from high altitude risk are to check to ascend a height with device, and be equipped with safety belt or other ascend a height
Articles.
First establish before step 1) of the present invention presetting module, establish risk information obtain module, establish risk determining module,
It establishes display module and establishes risk and eliminate judgment module, presetting module is used to preset the operation in steam turbine profession debugging process
Task；Risk information obtains module and is used to obtain risk reference information according to the job task of selection；Risk determining module is used for
Risk classifications are determined according to risk reference information；Display module is for showing that risk classifications and control corresponding with risk classifications are arranged
It applies；Risk eliminates judgment module and is used to receive confirmation instruction of the user to control measure are executed, if confirming, instruction is correct, then eliminates
Show risk classifications and control measure corresponding with risk classifications.
The preset job task of presetting module of the present invention includes opening debugging mode, and it includes permission that risk information, which obtains module,
Main inlet throttle-stop valve or pitch bite acquiring unit, the not perfect acquiring unit of interlock protection, exception after state acquiring unit, steam turbine tripping
One or more of operating condition acquiring unit；Rights state acquiring unit is for verifying user right, when user right state
When not passing through for permission, risk determining module determines that risk classifications are risk of errors, and display module shows " mistake！It please verify power
It limits and can not execute "；Main inlet throttle-stop valve or pitch bite acquiring unit are for receiving steam turbine main inlet throttle-stop valve and pitch after steam turbine tripping
Feedback, when main inlet throttle-stop valve and pitch are not turned off, risk determining module determines that risk classifications are speed-regulating system risk, and display module is aobvious
Show " speed-regulating system risk！Check whether the corresponding control measure execute according to pre-set programs "；Interlock protection is not perfect to be obtained
Take unit for receiving interlock protection logic, when interlock protection logic does not meet actual demand or is not inconsistent with signature version logic
When, risk determining module determines that risk classifications are the degree of perfection risk that related cooperation profession satisfies the requirements, and display module is shown
" interlock protection is not perfect！Please before subsystem test run, guarantee that equipment, system interlock protection is static and dynamic test is correctly complete
At "；Unusual service condition acquiring unit is used for receiving device abnormality, and when the equipment of each system is deposited when abnormal, risk determines mould
Block determines that risk classifications are unusual service condition risk, and display module shows " unusual service condition！It please determine equipment or system mode "；In advance
If the preset job task of module includes low pressure (LP) cylinder exhaust temperature, it includes that low pressure (LP) cylinder exhaust temperature obtains that risk information, which obtains module,
Unit, low pressure (LP) cylinder exhaust temperature acquiring unit is for receiving low pressure (LP) cylinder exhaust temperature value, when low pressure (LP) cylinder exhaust temperature value is higher than in advance
If when temperature value, risk determining module determines that risk classifications are low pressure (LP) cylinder exhaust temperature high risk, and display module shows " low pressure (LP) cylinder
Exhaust temperature is high！It is please executed according to program "；It includes surface temperature acquiring unit that risk information, which obtains module, and surface temperature obtains
Unit is for receiving steam turbine hull-skin temperature and pipeline external surface temperature, when steam turbine hull-skin temperature or pipeline external surface temperature are big
When preset temperature value, risk determining module determines that risk classifications are Caution! Hot risk；The preset job task of presetting module
It is run including steam turbine, risk information obtains module and includes whether Bearing Temperature or vibration exceeding the standard acquiring unit, inspection work
Whether the state of progress acquiring unit, subsystem have run one or more of debugging mode acquiring unit；Risk information
Obtaining module includes Bearing Temperature or vibration exceeding the standard acquiring unit, and Bearing Temperature or vibration exceeding the standard acquiring unit are used for
Bearing temperature value is obtained, when Bearing Temperature or vibration exceeding the standard, risk determining module determines that risk classifications are bearing temperature
Cross high risk or vibration exceeding the standard risk, display module show " Bearing Temperature, vibration exceeding the standard, please arrestment is run immediately,
It can just put into operation again according to program after ascertaining the reason and being disposed "；Whether inspection work has carried out state acquiring unit use
In the state whether acquisition inspection work has carried out, when the state whether inspection work has carried out is not carry out inspection, risk
Determining module determines that risk classifications are non-inspection risk, display module " the non-inspection of display！Row inspection that come in "；Whether subsystem
Operation debugging mode acquiring unit is for obtaining the state whether subsystem has run debugging, when whether subsystem has run debugging
State be when not debugging subsystem, risk determining module determines that risk classifications are the not perfect risk of debugging step, display module
Display " come in, and row subsystem is debugged "；The preset job task of presetting module includes high altitude operation, and risk information obtains module packet
Seat belt status acquiring unit is included, seat belt status acquiring unit works as safety belt for obtaining whether safety belt has been provided with state
Whether having been provided with state is when being not equipped with safety belt, and risk determining module determines that risk classifications are careful falling from high altitude risk, is shown
Show module to show carefully to fall！It please detect and ascend a height with device and safety belt or other articles of ascending a height please be equipped with.
Compared with prior art, the present invention show that debugging needs to complete in groundwork by decomposing steam turbine profession debugging
Hold, is distinguished in specific debugging by commissioning staff according to the relevance of action using it as preset job task
It chooses each job task to be sequentially completed, during carrying out each corresponding job task, automatically obtains and carry out accordingly
Job task during the relevant risk reference information of risk that may be present, judge that risk is according to risk reference information
No presence and control measure corresponding with risk by display risk classifications and corresponding control measure, and are receiving work people
After member is to the correct confirmation instruction of the execution of control measure, it just can be carried out and operate in next step, so as to effective pre- radix saposhnikoviae
Danger, realizes the comprehensively control of anti-accident, it is ensured that the peace of the person and equipment in the normalization and debugging process of steam turbine profession debugging
Quan Xing.
Detailed description of the invention
Fig. 1 is the step flow diagram of the embodiment of the present invention.
Fig. 2 is the Risk Pre-control system schematic of the embodiment of the present invention.
Fig. 3 is the steam turbine trip risk Pre-control System schematic diagram of the embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
Embodiment.
Referring to Fig. 1 to Fig. 3.
The present embodiment is a kind of steam turbine profession debugging process risk pre-control method, is in turn included the following steps:1) it presets
Job task in steam turbine profession debugging process；2) risk reference information is obtained according to preset job task；
3) risk classifications are determined according to risk reference information；4) risk classifications are shown, and are shown corresponding with risk classifications
Control measure；5) Party A is received to instruct the confirmation for executing control measure；If confirmation instruction is correct, then the wind of display is eliminated
Dangerous type, and eliminate the control measure corresponding with risk classifications of display.
Show that debugging needs to complete working contents by decomposing steam turbine debugging, it will according to the relevance of action
It is chosen each debugging task respectively by commissioning staff and is sequentially completed respectively as preset debugging task in specific debugging,
During every progress corresponding debugging task, automatically obtain that may be present during carrying out corresponding debugging task
Risk and relevant risk reference information, and judge that risk whether there is and corresponding with risk according to risk reference information
Control measure realize the comprehensively control of anti-accident so as to effectively control and avoid risk, it is ensured that debugging it is normative with
And personal and equipment safety in debugging process.
In the present embodiment, steam turbine is Shanghai Electric Power Station Equipment Co's Shanghai steam turbine plant (STP) manufacture.Steam turbine
Pattern：An overcritical, resuperheat, table coagulate formula indirect air cooling, single steam extraction (heating steam extraction) condensing turbine.Model：
CJK350-24.2/0.4/566/566.Steam turbine major parameter such as table 1.
Table 1
Boiler Steam quality standard (GB/T12145-2008) such as table 2.
Table 2
The research object of the steam turbine profession debugging process risk pre-control method of this implementation is not limited to the above model
Steam turbine
Preset debugging task includes opening the job task of debugging mode, risk ginseng corresponding with the debugging mode of unlatching
Examining information includes one or several kinds of combinations in following four information, to check the wind at the beginning of debugging mode is opened automatically
Danger.
The first:Risk reference information includes rights state.In steam turbine debugging process, commissioning staff, which chooses, opens debugging mould
After formula, steam turbine system obtains the permission of commissioning staff by detection automatically or from detection device corresponding in steam turbine system
State.Rights state, which refers to, to be needed to verify identity information to commissioning staff, determines operating right by identity information.When permission shape
When state is that permission does not pass through, then determine that risk classifications are risk of errors, while prompting the corresponding control measure of risk of errors is to ask
It verifying authorization and can not execute, other personnel misoperations of no awareness of safety or non-standard operation is avoided to cause accident.Permission
Not by including without carrying out authentication and the incorrect situation of authentication information.
Second:Risk reference information includes main inlet throttle-stop valve bite or pitch bite after steam turbine trip.It is main after steam turbine tripping
Porthole bite or pitch bite can be by being arranged LVDT displacement sensor.Usually, when the setting value of main inlet throttle-stop valve or pitch
When being greater than threshold value with the difference of value of feedback, determine that risk classifications are speed-regulating system risk, and correspond to speed-regulating system indicating risk
Control measure are prompt speed-regulating system risk.Check the executive condition of pre-set programs：1) check whether turbine speed declines, pot
Furnace MFT, generator off-the-line；2) after steam turbine tripping, discovery porthole bite is not closed all and when revolving speed rapid decrease by normal
Shutdown is handled；3) after steam turbine tripping, discovery porthole bite is not closed when revolving speed being caused to increase all, and it is tight should to destroy vacuum
Emergency stop machine stops vacuum pump operation, boiler pressure release as early as possible.Stop the operation of EH oil pump；4) after steam turbine trip, if load does not arrive
Zero, steam turbine still maintains 3000r/min, the non-off-the-line of generator, and no reverse power signal checks steam turbine side without obvious fault, and boiler is not
Fire extinguishing then reduces main, reheat pressure as far as possible, maintains minimum load operation, contacts overhaul plan porthole bite defect immediately；Such as hair
Motor inverse probability answers timely off-the-line generator, the manual MFT of boiler；5) it ascertains the reason, it can be again after processing porthole bite defect
Starting.
The third:Risk reference information includes that interlock protection is not perfect.Interlock protection is not perfect can be interlocked by setting
The detection of relay protective scheme inspection card.In general, interlock protection logic is not perfect will to bring huge hidden danger to unit safety, therefore to interlocking
An interlock protection logical check card is arranged in relay protective scheme, and when work checks interlock protection logic item by item, when interlock protection logic
When not being inconsistent with interlock protection logical check card, determine that risk classifications are the degree of perfection risk that related cooperation profession satisfies the requirements,
And the control measure of the corresponding professional degree of perfection indicating risk to satisfy the requirements of related cooperation are to guarantee to set before subsystem test run
Standby, system interlock protection static state and dynamic test are correctly completed.
4th kind:Risk reference information includes unusual service condition.Unusual service condition can have inspection by a whole set of entry condition
Card is to obtain.When the installation and debugging condition at scene, which has one to be unsatisfactory for a whole set of entry condition, has inspection card, risk class is determined
Type is unusual service condition risk, and unusual service condition risk correspondence is as follows：
1) unit main protection have any one it is abnormal；
2) unit predominantly detects monitored meter function and loses, and influences unit starting or normal operation；Or unit mainly monitors
Parameter over-limit condition；
3) major operating system loses good in interactive function；
4) host emergency overspeed governor regular event or any overspeed protection are unable to action message；
5) the EH oil of host and oil quality of lubricant are unqualified, oil temperature is lower than 21 DEG C or fuel level in tank is low；
6) unit MCS system, FSSS system, the work of DCS, DEH, TSI, ETS system are abnormal, influence unit and normally transport
Row；
7) high and low pressure bypath system control device is abnormal, influences unit and operates normally and start；
8) any high pressure main inlet throttle-stop valve of steam turbine and pitch, steam extraction non-return flap, high row's ventilation valve, high row's non-return flap bite, no
It can close tight；
9) barring gear is abnormal；
10) TOP, MSP, EOP, EH oil pump, jacking(oil) pump failure or its corresponding interlock protection test are unqualified.Seal Oil
The system failure；
11) permanent bending of rotor value and original value deviation exceed ± 0.02mm；
12) steam turbine is high, intermediate pressure cylinder is swollen difference >=10.3mm or≤- 5.3mm, low pressure (LP) cylinder is swollen difference >=19.8mm；
13) high, intermediate pressure cylinder upper and lower temperature difference >=35 DEG C.
14) Steam-water Quality is unqualified；
15) Turbo-generator Set rotating part has obvious metal friction sound；
16) steam turbine water-inlet-proof protection system is abnormal；
17) shaft seal steam is abnormal；
18) it keeps the temperature imperfect；
19) instrument gas system works abnormal, cannot provide unit just common gas；
20) generator hydrogen purity, humidity are unqualified or hydrogen cooler has exception；
21) Generator Stator Cooling water conductivity is unqualified or Stator Condense Water System has other exceptions；
22) transformer unit insulation is unqualified；
23) main protection of any one of transformer unit cannot normally be put into；
24) generator air-tight test is unqualified；
25) automatic voltage adjustor of power generator AVR work is abnormal.
The corresponding control measure of unusual service condition risk are to monitor the generation of an any of the above-described unusual service condition.
Preferably, preset job task still further comprises the job task of high temperature, wind corresponding with high-temperature operation
Dangerous reference information includes one or two kinds of combination in following information, when excluding to need high-temperature operation in debugging process
Risk that may be present.
The first:Risk reference information includes low pressure (LP) cylinder exhaust temperature.Low pressure (LP) cylinder exhaust temperature can be arranged by low pressure (LP) cylinder
Stripping temperature meter or temperature switch detect.When low pressure (LP) cylinder exhaust temperature is higher than preset temperature value, the risk class is determined
Type is high temperature risk, shows that corresponding control measure are：
1) guarantee that condensed water water quality is good；
2) guarantee that strainer is corresponding with the size of spray head in low pressure (LP) cylinder on low pressure cylinder spray desuperheat valve pipeline, avoid spray head
Blocking；
3) during test run, in regular downtime, should strainer to the Attemperation water system in low pressure (LP) cylinder and spray head carry out
It cleans, to guarantee the atomizing effect of spray head；
4) in operation, low pressure (LP) cylinder exhaust temperature should be looked over one's shoulder, it should be first to desuperheat when exhaust temperature reaches alarming value
The strainer of water bypass and regulating valve is cleaned, to guarantee that impurity does not enter in desuperheat sprinkler head；
5) gate stop-start should be beaten immediately when exhaust temperature reaches 121 DEG C of values；
6) guarantee that the interlocking of low pressure cylinder spray desuperheating water automatic regulating valve is normal handy.
Second:Risk reference information includes boiler hull-skin temperature and pipeline external surface temperature.Scald is debugging engineering
In incidental risk, by being detected to steam turbine hull-skin temperature and pipeline external surface temperature, when steam turbine outer surface temperature
When degree and pipeline external surface temperature are greater than preset temperature value, determine that risk classifications are Caution! Hot risk, display is corresponding carefully to scald
The control measure of cold danger are that system pipeline installation is close, and heat preservation finishes, and wears high temperature protection articles, wherein high temperature protection articles
Including proximity gloves and safety goggles.
Preferably, preset job task further includes the job task of steam turbine operation, it is corresponding with steam turbine operation
Risk reference information includes the following three types the combination of one or more of information, is tried with checking the steam turbine in debugging process
Risk that may be present when operation.
The first:Risk reference information includes Bearing Temperature or vibration exceeding the standard.Detect Bearing Temperature or
Vibration exceeding the standard situation is the work for being frequently necessary to carry out in steam turbine commissioning process, when steam turbine is run, because need of work measures
Equipment bearing temperature and vibration data need timely global analysis, determine that can equipment be safely operated steadily in the long term.Work as bearing
When temperature is excessively high or vibration exceeding the standard, determines that risk classifications are careful damage equipment Risk, show corresponding careful damage equipment wind
The control measure of danger are arrestment to run immediately, can just be put into operation again according to program after ascertaining the reason and being disposed.
Second:Risk reference information includes the state whether inspection work has carried out.Whether inspection work has carried out
State, which can show its substep according to the content that inspection work includes, to be confirmed to staff one by one and is obtained, and can also be passed through
The system or specification that the other forms such as operation manual are made are placed in steam turbine system work area domain for staff refering to directly
It connects and has been carried out by staff's confirmation or do not carried out and obtain.Secondly, patrol worker can also be inputted by obtaining staff
Whether several key parameters needed to be implemented in work are correct to verify the state whether inspection work has carried out.When the patrol worker
Making the state whether carried out is to determine that risk classifications are non-inspection risk, the corresponding non-inspection risk of display when not carrying out inspection
Control measure be come in row inspection.The content of inspection work includes specification dressing, equipment and pipe inspection.Work in every content
Respectively include measure control as follows：
(1) specification dressing：Into live operating personnel, Safety helmet must be worn.The operating personnel of manual handling must wear
Good safety cap and protective gloves, put on antisquashy shoe, wear goggles when necessary.Operator has to pass through professional skill training,
And grasp the execute-in-place regulation and safety protection knowledge of mechanical (equipment).Operator must put on work clothes, the sleeve of clothes
Mouth should be buckled well, and scarf or necktie must not be worn, and woman's long hair must coil in cap, wear anti-dust mask when necessary, and wear absolutely
Edge shoes.
(2) equipment and pipe inspection：Inspection needs mesh to see in the process, ear is listened, nose is heard, hand is touched, comprehensive with various sense organs
Equipment is maked an inspection tour, has any exception to report without delay；It also to make an inspection tour live abnormal personnel or have no right to employ the personnel of equipment dynamic
Use equipment.
The third:Risk reference information includes the state whether subsystem has run debugging.Whether subsystem has run tune
The state of examination, which can run the content that debugging includes according to subsystem and show its substep, to be confirmed to staff one by one and is obtained,
It can also be placed in by the system or specification that the other forms such as operation manual are made in steam turbine system work area domain for work
Personnel are refering to directly having run debugging or not running by staff's confirmation and debugged and obtain ".When whether subsystem has run
The state of debugging is to determine that risk classifications are the not perfect risk of debugging step when not debugging subsystem, show corresponding debugging step
The control measure of not perfect risk for come in, debug by row subsystem.The content of subsystem trial operation include steam turbine condensate system and
Water charging system debugging, direct water cooling debugging, steam turbine lubricating oil, jacking oil and cranking system debugging, adjusting security system debugging.
Work in every content respectively includes measure control as follows：
(1) steam turbine condensate system and water charging system debugging：1) examination is completed in equipment monomer debugging；2) condenser has been
Manual cleaning is clean；3) test run constituent parts personnel are clear to hilllock, division of duty, and have good communication apparatus to want to meet test run
It asks；4) condensate pump and pipe-line system install, and mounting technique records complete；5) condensate system associated conduit, which is checked and accepted, closes
Lattice；6) electrical test of institute's gas-distributing motor is completed, and meets test run requirement；7) operation of the equipment such as water pump, valve and electrical source of power can
It leans on, to control bleed pressure normal；8) qualified lubricating oil is added in condensate pump motor thrust bearing grease chamber, and oil level is normal.
(2) direct water cooling is debugged：1) examination is completed in equipment monomer debugging；2) discharge pipe line is completed and has permitted arranging
Enter sea；3) each valve in circulating water pipe road installs, including along pipeline all exhaust valves, hydraulic butterfly valve, it is electronic every
It is complete from confirmations such as valve, regulating valve, bypass valves, and confirm pipeline all wickets closings on the way, steel-slag sand etc. is intactly；It follows
Between ring Water gate valve, water pump layer and tunnel clean out, channel is unimpeded；4) in circulation all rotations it is mechanical added it is required
Lubricating oil, rouge；5) check that circulating water line and open water system, rubber ball cleaning system valve should close tightly；It is special if any boiler
Industry is drained to recirculated water valve and is closed tightly；Isolation is complete.
(3) steam turbine lubricating oil, jacking oil and cranking system debugging：1) oil system, which has rinsed, finishes and has obtained qualification unit
Oil report, oil meets the requirements；2) examination is completed in equipment monomer debugging；3) high pressure, alternating current-direct current grease pump, fuel tank,
Jacking(oil) pump and its piping (including valve, strainer), reconditioner have installed, and have met commissioning requirements on inspection；4)
Barring gear dress watch is complete, i.e., enclosure interior cleaning, bright and clean, no-sundries, burr, crackle and mechanical damage, pinion gear are smooth
It is bright and clean, it has no mechanical damage, the engagement of gear reduction mechanism gear is normal, without exception.
(4) adjusting security system is debugged：1) examination is completed in equipment monomer debugging；2) unit installation installment work is complete
Portion terminates, acceptance(check), and EH oil, lubricating oil system pipeline circulation flushing terminate, and duct cleaning, oil meet the requirements；3) system
Bulge test is completed；4) fuel level in tank instruction is correct, comes into operation, and each oil pressure and oil temperature sensor debugging finish, central station of floating dock instrument
Display is accurate.
As preferred, preset job task further includes the job task of high altitude operation, wind corresponding with high altitude operation
Dangerous reference information includes whether to be equipped with safety belt.High altitude operation is that steam turbine debugging efforts personnel frequently encounter and accident rate occurs
Relatively high link, for some veteran staff before carrying out high altitude operation also often originals such as because of carelessness
Because leading to contingency occur.Being equipped with safety belt is the effective means for carrying out high altitude operation and preventing accident, and carries out high altitude operation
It detects whether to be equipped with seat belt status when job task, when whether being equipped with seat belt status to be not equipped with safety belt, determines wind
Dangerous type is careful falling risk, and the control measure of the corresponding careful falling risk of display are that detection ascends a height with device and is equipped with safety
Band or other articles of ascending a height.In the specific implementation, prevent high altitude operation accident control measure can also include check support frame,
Protective fence avoids bad weather operation etc., these control measure can be shown by display device, can also pass through formulation
Guide Book is consulted for scene.Carrying out the specific control measure of risk present in high altitude operation includes:Proper use of safety
Band, safety belt must tie up on secured object, prevent from falling off and " correctly dress on-slip shoes；If " high-rise working does not have special messenger's monitoring
In the case where hanging safety belt, should using catching device or safety rope, " platform of high-rise working should be equipped with qualification；Firm protective fence,
Prevent operating personnel's fault or seating from falling；Operation foothold area is wanted enough, and springboard carries out full paving and effectively fixes；It ascends a height use
Support frame, scaffold material are qualified, and guard rail is housed；It sets up secured and qualified rear can be used by inspection, no over-loading,
Prevent frame body collapsing to fall, causes personnel to step on empty or unstability and fall, should be had enough using the structural member of hanging basket suspension gear
Intensity；Rigidity and counterweight and can fixation be able to bear strong wind and heavy rain at 5 grades or more, thunder and lightning, hail, big
The bad weathers such as mist should stop outdoor high-rise working.
Steam turbine debugging process risk pre-control method provided by the present embodiment, by risk control program standard operation and
There may be risks for investigation in advance, by showing to risk that may be present and corresponding control measure, and are receiving
Staff is next to can just enter (after i.e. respective risk is eliminated) after the correct confirmation instruction of control measure executive condition
Step operation, to assist staff to complete to debug and pay attention to anticipating risk one by one, therefore, which can be to operation
It may cause casualties in the process or the hazard factor of equipment safety operation threatened to carry out system and comprehensively identify, to ensure vapour
The person and equipment safety, realize efficient risk management in machine debugging process.It can be understood that presetting and adjusting when specific implementation
The quantity of job task and particular content are not limited to mode described above during examination, can carry out according to the actual situation
Supplement and optimization.
Table 3 is debugging task, risk reference information, risk classifications and its control measure corresponding relationship.
It is pre- that the steam turbine profession debugging process risk pre-control method of the present embodiment is based on steam turbine profession debugging process risk
Control system, the system include that presetting module, risk information acquisition module, risk determining module, display module and risk elimination are sentenced
Disconnected module.Presetting module is used to preset the job task in steam turbine debugging process；Risk information obtains module and is used for according to selection
Job task obtain risk reference information；Risk determining module is used to determine risk classifications according to risk reference information；Display
Module is for showing risk classifications and control measure corresponding with risk classifications；Risk eliminates judgment module for receiving user couple
The confirmation instruction for executing control measure then eliminates the risk classifications of display and corresponding with risk classifications if confirmation instruction is correct
Control measure.
The preset job task of presetting module includes opening debugging mode, and it includes that rights state obtains that risk information, which obtains module,
Main inlet throttle-stop valve or pitch bite unit, the not perfect acquiring unit of interlock protection and unusual service condition obtain after taking unit, steam turbine to trip
One or more of unit.
In addition, it should be noted that, the specific embodiments described in this specification, the shape of parts and components are named
Title etc. can be different, and above content is only to structure of the invention example explanation described in this specification.It is all according to
According to equivalence changes or simple change that the invention patent design structure, feature and principle is done, it is included in this hair
In the protection scope of bright patent.Those skilled in the art can do described specific embodiment various
The mode that the modify or supplement or adopt of various kinds is similar substitutes, and without departing from structure of the invention or surmounts present claims
Range defined in book, is within the scope of protection of the invention.
Claims (8)
1. a kind of steam turbine profession debugging process risk pre-control method, it is characterised in that：Step successively includes:
Job task in default steam turbine profession debugging process；
Risk reference information is obtained according to preset job task；
Risk classifications are determined according to risk reference information；
Show risk classifications, and display control measure corresponding with risk classifications；
Party A is received to instruct the confirmation for executing control measure；If confirmation instruction is correct, the risk classifications of display are eliminated, with
And eliminate the control measure corresponding with risk classifications of display；
Wherein, job task includes opening debugging mode；
Risk reference information includes following four information:Main inlet throttle-stop valve bite or pitch bite, interlocking after rights state, steam turbine trip
It protects not perfect；
When rights state is that permission does not pass through, permission is not risk of errors by determining risk classifications, and risk of errors is corresponding
Control measure are to ask verifying authorization and can not execute；
The risk classifications that main inlet throttle-stop valve bite or pitch bite determine after steam turbine trip are speed-regulating system risk, speed-regulating system risk pair
The control measure answered are measure 1. to any one or several in 5.：
1. checking whether steam turbine revolving speed declines, boiler main fuel trip and generator off-the-line；
2. after steam turbine trip, discovery main inlet throttle-stop valve bite does not close all and when revolving speed rapid decrease, handled by orderly closedown；
3. after steam turbine trip, discovery main inlet throttle-stop valve bite is not closed when revolving speed being caused to increase all, and vacuum is destroyed, and emergency shutdown stops
Only vacuum pump operation, boiler pressure release stop the operation of EH oil pump；
4. after steam turbine trip, if load not to zero, steam turbine still maintain 3000 revs/min, the non-off-the-line of generator, without inverse probability believe
Number, check that steam turbine side is not put out a fire without obvious fault or boiler, then reduce main vapour pressure and reheat pressure, maintain minimum load operation,
Overhaul plan main inlet throttle-stop valve bite defect is contacted immediately；If electrical power generators power is inverse probability, then off-the-line generator, boiler are manual
MFT；
5. ascertaining the reason, can be restarted after handling main inlet throttle-stop valve bite defect；
The risk classifications of the not perfect determination of interlock protection are the degree of perfection risk that related cooperation profession satisfies the requirements, correlation cooperation
The corresponding control measure of degree of perfection risk that profession satisfies the requirements are to guarantee equipment and system connection before subsystem test run
Lock is protected
Shield static test and dynamic test are correctly completed；
Risk classifications are that equipment does not have a whole set of entry condition：Unit main protection have any one it is abnormal；Unit predominantly detects
Instrument loses function for monitoring, influences unit and opens
Dynamic or normal operation, alternatively, the main monitoring parameters over-limit condition of unit；Operating system loses good in interactive function；It is main
Machine
Emergency overspeed governor regular event or any overspeed protection are unable to action message；The oily unqualified, lubricating oil of EH oil of host
Oil
Unqualified, oil temperature is lower than 21 DEG C or fuel level in tank is low；Unit MCS system, FSSS system, DCS, DEH, TSI or ETS
System work is abnormal, influences unit normal operation；Hp by-pass system control device or low-pressure bypass system control dress
It sets not
Normally, unit is influenced to operate normally and start；Any high pressure main inlet throttle-stop valve of steam turbine, pitch, steam extraction non-return flap, high row's ventilation
Bite occurs for valve, high row's non-return flap, cannot close tight；Barring gear is abnormal；TOP, MSP, EOP, EH oil pump, top
Shafting oil failure of pump or its corresponding interlock protection test unqualified, sealing oil system failure；Permanent bending of rotor value and original value
Deviation
Greater than 0.02mm；Steam turbine differential expansion of HP casing >=10.3mm or steam turbine differential expansion of HP casing≤- 5.3mm, while the swollen difference of low pressure (LP) cylinder
≥
19.8mm；Steam turbine intermediate pressure cylinder the is swollen difference >=10.3mm or swollen poor≤- 5.3mm of steam turbine intermediate pressure cylinder, at the same low pressure (LP) cylinder it is swollen it is poor >=
19.8mm；
High pressure cylinder upper and lower temperature difference >=35 DEG C and intermediate pressure cylinder upper and lower temperature difference >=35 DEG C；Steam-water Quality is unqualified；Turbo-generator Set turns
Dynamic portion
Dividing has obvious metal friction sound；Steam turbine water-inlet-proof protects system abnormal；Shaft seal steam is abnormal, keeps the temperature imperfect；Instrument
With
The work of gas system is abnormal, cannot provide unit just common gas；Generator hydrogen purity is unqualified, humidity is unqualified
Or
Hydrogen cooler has exception；Generator Stator Cooling water conductivity is unqualified or Stator Condense Water System has other exceptions；
Hair becomes
Group insulation is unqualified；The main protection of any one of transformer unit cannot normally be put into；Generator air-tight test is unqualified；Generator
From
Dynamic voltage regulator AVR work is abnormal.
2. steam turbine profession debugging process risk pre-control method according to claim 1, it is characterised in that：Job task packet
It includes
Low pressure (LP) cylinder exhaust temperature, risk classifications are that low pressure (LP) cylinder exhaust temperature is high, the high corresponding control measure of low pressure (LP) cylinder exhaust temperature
Including:
Guarantee that condensed water water quality is good；Guarantee the size phase of strainer and spray head in low pressure (LP) cylinder on low pressure cylinder spray desuperheat valve pipeline
It is corresponding,
Avoid the blocking of spray head；Strainer and spray during test run, in regular downtime, to Attemperation water system in low pressure (LP) cylinder
Head
It is cleaned, guarantees the atomizing effect of spray head；In operation, low pressure (LP) cylinder exhaust temperature is monitored, when exhaust temperature reaches alarm
Value
Shi Shouxian bypasses desuperheating water and the strainer of regulating valve cleans, and guarantees that impurity does not enter in desuperheat sprinkler head；Work as row
Steam temperature
Degree beats gate stop-start when reaching 121 DEG C of values immediately；Guarantee that low pressure cylinder spray and the interlocking of desuperheating water automatic regulating valve operate normally.
3. steam turbine profession debugging process risk pre-control method according to claim 2, it is characterised in that：Risk classifications packet
Vapour leakage is included, it is to check and fasten pipeline junction that vapour, which leaks corresponding control measure, is isolated at leakage.
4. steam turbine profession debugging process risk pre-control method according to claim 3, it is characterised in that：Risk is with reference to letter
Breath
Including steam turbine hull-skin temperature and pipeline external surface temperature, when steam turbine hull-skin temperature or pipeline external surface temperature are greater than in advance
If warm
When angle value, determine that risk classifications are Caution! Hot risk, the corresponding control measure of Caution! Hot risk are close installation system
Road under the overall leadership
High temperature protection articles are kept the temperature and are worn, high temperature protection articles include proximity gloves and safety goggles.
5. steam turbine profession debugging process risk pre-control method according to claim 4, it is characterised in that：Job task packet
Steam turbine operation is included, risk reference information includes the following three types information:Whether Bearing Temperature or vibration exceeding the standard, inspection work
Whether the state of progress and subsystem have run debugging mode；Bearing Temperature or vibration exceeding the standard determine risk classifications
Carefully to damage equipment Risk, the careful corresponding control measure of equipment Risk of damaging is the operation of arrestment immediately, originals to be found out
Because and can just put into operation again according to program after being disposed；Whether inspection work has carried out state, not into
The corresponding control measure of row inspection are that prompt carries out inspection；Whether subsystem has run debugging mode,
Not debugging the risk classifications that subsystem determines is the not perfect risk of debugging step, and the corresponding control of the not perfect risk of debugging step is arranged
It applies and carries out subsystem debugging for prompt.
6. steam turbine profession debugging process risk pre-control method according to claim 5, it is characterised in that：Job task packet
High altitude operation is included, the corresponding risk reference information of high altitude operation includes whether to be equipped with seat belt status；When whether being equipped with safety belt
State is to determine that the risk classifications for being not equipped with safety belt are falling from high altitude risk, falling from high altitude risk pair when being not equipped with safety belt
The control measure answered are to check to ascend a height with device, and outfit safety belt or other articles of ascending a height.
7. steam turbine profession debugging process risk pre-control method according to claim 6, it is characterised in that：Step 1）Before
Presetting module is first established, risk information acquisition module is established, establishes risk determining module, establishes display module and establish risk
Judgment module is eliminated, presetting module is used to preset the job task in steam turbine profession debugging process；Risk information obtains module and uses
According to the job task of selection acquisition risk reference information；Risk determining module is used to determine risk according to risk reference information
Type；Display module is for showing risk classifications and control measure corresponding with risk classifications；Risk is eliminated judgment module and is used for
User is received to instruct the confirmation for executing control measure, if confirmation instruction is correct, then eliminate display risk classifications and with risk class
The corresponding control measure of type.
8. steam turbine profession debugging process risk pre-control method according to claim 7, it is characterised in that：Presetting module is pre-
If job task include open debugging mode, risk information obtain module include rights state acquiring unit, steam turbine tripping
Main inlet throttle-stop valve or pitch bite acquiring unit, the not perfect acquiring unit of interlock protection afterwards；Rights state acquiring unit is used for verifying
Family permission, when user right state is that permission does not pass through, risk determining module determines that risk classifications are risk of errors；Steam turbine
Main inlet throttle-stop valve or pitch bite acquiring unit be for receiving steam turbine main inlet throttle-stop valve and pitch feedback after tripping, when main inlet throttle-stop valve and pitch not
When closing, risk determining module determines that risk classifications are speed-regulating system risk；The not perfect acquiring unit of interlock protection is for receiving
Interlock protection logic, when interlock protection logic does not meet actual demand or is not inconsistent with signature version logic, risk determining module
Determine that risk classifications are the degree of perfection risk that related cooperation profession satisfies the requirements；Unusual service condition acquiring unit is used for receiving device
Abnormality, when the equipment of each system is deposited when abnormal, risk determining module determines that risk classifications are unusual service condition risk；It is default
The preset job task of module includes low pressure (LP) cylinder exhaust temperature, and it includes that low pressure (LP) cylinder exhaust temperature obtains list that risk information, which obtains module,
Member, low pressure (LP) cylinder exhaust temperature acquiring unit are preset for receiving low pressure (LP) cylinder exhaust temperature value when low pressure (LP) cylinder exhaust temperature value is higher than
When temperature value, risk determining module determines that risk classifications are low pressure (LP) cylinder exhaust temperature high risk；Risk information obtains module
Surface temperature acquiring unit, surface temperature acquiring unit work as vapour for receiving steam turbine hull-skin temperature and pipeline external surface temperature
When machine hull-skin temperature or pipeline external surface temperature are greater than preset temperature value, risk determining module determines that risk classifications are careful scald
Cold danger；The preset job task of presetting module include steam turbine operation, risk information obtain module include Bearing Temperature or
Whether vibration exceeding the standard acquiring unit, inspection work have carried out whether state acquiring unit, subsystem have run debugging mode acquisition
Unit；It further includes Bearing Temperature or vibration exceeding the standard acquiring unit, Bearing Temperature or vibration that risk information, which obtains module,
Exceeded acquiring unit is for obtaining bearing temperature value, and when Bearing Temperature or vibration exceeding the standard, risk determining module determines wind
Dangerous type is Bearing Temperature risk or vibration exceeding the standard risk；Whether inspection work has carried out state acquiring unit for obtaining
The state whether inspection work has carried out, when the state whether inspection work has carried out is not carry out inspection, risk determines mould
Block determines that risk classifications are non-inspection risk；Whether subsystem has run debugging mode acquiring unit for whether obtaining subsystem
The state for having run debugging, when the state whether subsystem has run debugging is not debug subsystem, risk determining module is true
Determining risk classifications is the not perfect risk of debugging step；The preset job task of presetting module includes high altitude operation, and risk information obtains
Modulus block includes seat belt status acquiring unit, and seat belt status acquiring unit is used to obtain whether safety belt has been provided with state,
When it is to be not equipped with safety belt that whether safety belt, which has been provided with state, risk determining module determines that risk classifications are careful falling from high altitude
Risk, display module, which is shown, carefully to fall!It please detect and ascend a height with device and safety belt or other articles of ascending a height please be equipped with.
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| US3948054A (en) * | 1973-07-27 | 1976-04-06 | Westinghouse Electric Corporation | Steam turbine blade protection system and method especially for electric power plants |
| US4245162A (en) * | 1973-08-15 | 1981-01-13 | Westinghouse Electric Corp. | Steam turbine power plant having improved testing method and system for turbine inlet valves associated with downstream inlet valves preferably having feedforward position managed control |
| CN103559924B (en) * | 2013-11-11 | 2017-03-15 | 中广核工程有限公司 | The adjustment method of nuclear power station steam turbine control system, apparatus and system |
| CN103670538B (en) * | 2013-12-10 | 2016-04-20 | 中广核工程有限公司 | Nuclear power station half speed turbine valve adjustment method and system |
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