CN108561196A - Fired power generating unit cuts off the safety protection system and method for low pressure (LP) cylinder operation - Google Patents
Fired power generating unit cuts off the safety protection system and method for low pressure (LP) cylinder operation Download PDFInfo
- Publication number
- CN108561196A CN108561196A CN201810181135.0A CN201810181135A CN108561196A CN 108561196 A CN108561196 A CN 108561196A CN 201810181135 A CN201810181135 A CN 201810181135A CN 108561196 A CN108561196 A CN 108561196A
- Authority
- CN
- China
- Prior art keywords
- cylinder
- steam
- low pressure
- valve
- dcs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000000605 extraction Methods 0.000 claims abstract description 160
- 230000001105 regulatory effect Effects 0.000 claims abstract description 121
- 239000007921 spray Substances 0.000 claims abstract description 74
- 238000001816 cooling Methods 0.000 claims abstract description 60
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 238000010248 power generation Methods 0.000 claims abstract description 5
- 230000005611 electricity Effects 0.000 claims description 45
- 238000010438 heat treatment Methods 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 239000004744 fabric Substances 0.000 claims description 8
- 230000001172 regenerating effect Effects 0.000 claims description 8
- 230000005619 thermoelectricity Effects 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 210000004907 gland Anatomy 0.000 claims description 3
- 238000003359 percent control normalization Methods 0.000 claims description 3
- 238000010977 unit operation Methods 0.000 abstract description 4
- 238000005520 cutting process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000003245 coal Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/003—Arrangements for measuring or testing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Turbines (AREA)
Abstract
The invention belongs to thermal power unit operation technical fields, are related to the safety protection system and method for fired power generating unit excision low pressure (LP) cylinder operation.The system includes the equipment of original machine group, be transformed can completely close in low cylinder steam guiding tube hydraulic butterfly valve；Increase the cooling steam system of low pressure (LP) cylinder；Low pressure cylinder spray temperature reducing system has been transformed；Increase all kinds of pressure sensors, flow measurement device and galvanic couple resistance.On method for security protection, devises hydraulic butterfly valve interlocking and open and allow the guard method closed；Extraction stop valve and the guard method of extraction check valve interlocking close and the guard method being turned off manually；Steam extraction speed closes regulating valve interlocking unlatching and allows the guard method closed；The interlocking of cooling steam regulating valve is opened and interlocking close guard method；The interlocking of low pressure cylinder spray regulating valve is opened and interlocking close guard method and the high or low guard method of intermediate pressure cylinder exhaust steam pressure.The operational safety of Steam Turbine is protected during thermal power generation unit cuts cylinder.
Description
Technical field
The invention belongs to thermal power unit operation technical fields, and in particular to fired power generating unit cuts off thermal technology's peace of low pressure (LP) cylinder operation
Full guard system and method.
Background technology
In recent years, the northern area of China closes on the big moulded coal motor group in city and transform cogeneration units, Heating Period as
To city dweller's heat supply, the generation load of unit increases with the increase of heating load, while the new energy electric powers such as wind-powered electricity generation, photovoltaic
Installed capacity maintains sustained and rapid growth, and wind-powered electricity generation and photovoltaic etc. provide a large amount of clean energy resourcies, but there is also its generated output with
Machine and unstability, safe operation and supply of electric power guarantee to electric system propose huge challenge.Heating Period electricity at present
Force system regulating power be difficult to completely adapt to cogeneration units and new energy extensive development and consumption requirement, occur compared with
It abandons wind to be serious, abandon optical issue.
To alleviate electric power excess capacity, accelerates energy technology innovation, excavate coal unit peak regulation potentiality, promote China's thermoelectricity
Operational flexibility, improves electric system peak regulation and new energy digestion capability comprehensively, National Energy Board assigned about《Thermoelectricity is flexible
The notice of property transformation project pilot》、《Tohoku Electric Power assisted hatching operation rule（It is tentative）》Equal associated documents, it is intended to heat
Electricity Federation production unit is transformed, and gives full play to thermoelectricity decoupling effect, alleviates regenerative resource consumption problem and the hot contradiction of electricity consumption
Problem.
Large-scale cogeneration units undertake two kinds of products of heat supply and power supply in Heating Period, and unit heating load is joined with local meteorology
Number, area of heat-supply service match, and unit power supply volume matches with power grid user demand, and large-scale cogeneration units are typically to utilize vapour
The intermediate pressure cylinder steam discharge of turbine to heat exchangers for district heating heats heat supply network recirculated water, and under original design condition, turbine low pressure cylinder still needs to
Minimum steam flow, i.e. low pressure (LP) cylinder is kept still to have larger acting ability, to meet power grid depth peak modulation capacity, implement to cut
Except low pressure (LP) cylinder is run, one of the mode that back pressure unit is flexibility transformation is become from extraction and condensing unit.
The hydraulic butterfly valve that can be completely closed has been transformed in low pressure (LP) cylinder steam inlet pipe road in so-called excision low pressure (LP) cylinder operation, makes low
Generated output of the cylinder pressure in unit operation is zero, and the intermediate pressure cylinder steam discharge of steam turbine is completely used for heating.While in order to drop
The air blast of low low pressure (LP) cylinder exhaust stage blade is generated heat, and installs low pressure (LP) cylinder cooling steam system and low pressure (LP) cylinder automatic water jetting regulating system additional.
During steam turbine becomes the back pressure unit method of operation from extraction and condensing unit, adjusted if hydraulic butterfly valve, steam extraction speed are closed
Valve, cooling steam regulating valve cooperation be unreasonable or intermediate pressure cylinder exhaust steam pressure, low pressure (LP) cylinder initial steam pressure, low pressure (LP) cylinder steam discharge
The state modulators such as temperature are unreasonable or low pressure (LP) cylinder cooling steam flow controls unreasonable and turbine discharge temperature higher than rule
Definite value can impact the safe operation of steam turbine, cause compressor emergency shutdown that destructive accident even occurs.
Unit has a set of fairly perfect protection system in heat power engineering when being run under original takes out and coagulates operating mode, coagulates operating condition by taking out
Become flexibility excision low pressure (LP) cylinder operating condition, needs to be modified protection system in heat power engineering and perfect.
Invention content
Goal of the invention：
In view of the problems of the existing technology, the present invention propose fired power generating unit excision low pressure (LP) cylinder operation safety system and
Method, its purpose is to ensure unit safety operation to meet heat supply and power demands.
Technical solution：
Fired power generating unit cuts off the safety system of low pressure (LP) cylinder operation, it is characterised in that：Including thermal power generation unit, thermal power generation
The boiler export of unit is communicated with high pressure cylinder by pipeline, and the pipeline for being connected to boiler export and high pressure cylinder is filled equipped with flow measurement
It sets, Steam Turbine's Main Vaper Valve and septum valve, the gland steam exhauster of high pressure cylinder is connected by boiler and with intermediate pressure cylinder, as middle pressure
The steam inlet pipe road in the steam inlet pipe road of cylinder, intermediate pressure cylinder is equipped with reheat control valve, and intermediate pressure cylinder passes through mesolow connecting pipe and low pressure (LP) cylinder
Connection, mesolow connecting pipe are equipped with hydraulic butterfly valve between intermediate pressure cylinder and low pressure (LP) cylinder, and low pressure (LP) cylinder steam drain is equipped with condenser, coagulates
The outlet of vapour device is connected with heat regenerative system, and heat regenerative system is connected to form closed circulation system with boiler；Steam turbine senior middle school low pressure rotor
It is connected with generator amature；Mesolow connecting pipe is also communicated with extraction line, and the extraction line other end is communicated with heat supply network heating
Device, extraction line are equipped with extraction stop valve, extraction check valve, steam extraction speed between intermediate pressure cylinder steam drain and heat exchangers for district heating and close tune
Section valve and extraction flow measuring device, heat exchangers for district heating are also associated with water level sensor, the heat exchangers for district heating drain water piping other end
It is connected with closed circulation system；Steam Turbine's Main Vaper Valve, septum valve and reheat control valve all trip with steam turbine and connect；Hair
The generator tripping interlocking steam turbine tripping of motor；Electricity hypervelocity OPC share 4 solenoid valves, wherein 2 with septum valve phase
Even, 2 are connected with reheat control valve；The steam inlet pipe road of intermediate pressure cylinder is additionally provided with reheated steam pressure sensor, low pressure (LP) cylinder is additionally provided with
The thermal resistance of the thermal resistance and low pressure (LP) cylinder cylinder body electricity end temperature of low pressure (LP) cylinder cylinder body tune end temperature, generator are additionally provided with power sensing
Device.
It transform the hydraulic butterfly valve that cannot be closed completely between intermediate pressure cylinder and low pressure (LP) cylinder as can be closed completely hydraulic control
Butterfly valve is also communicated with low pressure (LP) cylinder cooling steam system between intermediate pressure cylinder and low pressure (LP) cylinder, and low pressure (LP) cylinder cooling steam system includes cold
But steam control valve and cooling steam flow measuring device, intermediate pressure cylinder are equipped in the first intermediate pressure cylinder exhaust steam pressure sensor, second
Cylinder pressure exhaust steam pressure sensor and intermediate pressure cylinder exhaust temperature thermocouple, low pressure (LP) cylinder are equipped with low pressure (LP) cylinder initial steam pressure sensor, low pressure
The tune end adjusted after end thermal resistance, the second low pressure (LP) cylinder exhaust stage blade after cylinder throttle (steam) temperature thermocouple, the first low pressure (LP) cylinder exhaust stage blade
The electric end thermal resistance after electric end thermal resistance and the second low pressure (LP) cylinder exhaust stage blade after thermal resistance, the first low pressure (LP) cylinder exhaust stage blade；It is low
Cylinder pressure is also communicated with low pressure cylinder spray temperature reducing system, and low pressure cylinder spray temperature reducing system includes cooling water inlet, low pressure cylinder spray tune
Save the sensor of valve and low pressure cylinder spray flow.
Dcs DCS is inverse by cable and hydraulic butterfly valve, cooling steam regulating valve, extraction stop valve, steam extraction
Only valve, steam extraction speed close regulating valve, Steam Turbine's Main Vaper Valve, septum valve, reheat control valve, low pressure cylinder spray regulating valve, reheating
Steam pressure sensor, the first intermediate pressure cylinder exhaust steam pressure sensor, the second intermediate pressure cylinder exhaust steam pressure sensor, low pressure (LP) cylinder are into vapour pressure
Tune end after force snesor, intermediate pressure cylinder exhaust temperature thermocouple, low pressure (LP) cylinder throttle (steam) temperature thermocouple, the first low pressure (LP) cylinder exhaust stage blade
End thermal resistance, the electric end thermal resistance after the first low pressure (LP) cylinder exhaust stage blade, second are adjusted after thermal resistance, the second low pressure (LP) cylinder exhaust stage blade
The thermal resistance of electric end thermal resistance, low pressure (LP) cylinder cylinder body tune end temperature after low pressure (LP) cylinder exhaust stage blade, low pressure (LP) cylinder cylinder body electricity end temperature
The biography of thermal resistance, flow measurement device, cooling steam flow measuring device, extraction flow measuring device, low pressure cylinder spray flow
Sensor, generator power sensor, electricity hypervelocity OPC, steam turbine tripping, generator tripping are connected with water level sensor.
A kind of fired power generating unit excision low pressure (LP) cylinder operation as mentioned, i.e. stop valve and reheat control valve are opened, high voltage adjusting
Valve opens appropriate location according to generator power demand, and the difference with original system is that hydraulic butterfly valve completely closes, cooling steam tune
It saves valve to open, steam extraction speed closes regulating valve according to heat demand unlatching appropriate location, and low pressure cylinder spray regulating valve is opened；It is protected safely
The method for security protection of protecting system, it is characterised in that：This method includes the interlocked operation process of one or more guard methods, is protected
Maintaining method includes：Halt turbines protection, steam turbine tripping interlock protection, OPC actions interlock protection, generator tripping interlocking are protected
Shield, the protection of intermediate pressure cylinder exhaust steam pressure height, main steam flow minimum living shield, extraction line valve accidentally closes interlock protection, steam extraction speed is closed
It is fair that the small protection of control valve position, hydraulic butterfly valve allow closing to protect, extraction stop valve allows closing protection, steam extraction speed closes regulating valve
Perhaps protection is closed, protection is opened in the cooling steam regulating valve interlocking of low pressure (LP) cylinder, the cooling steam regulating valve interlocking close of low pressure (LP) cylinder
Protection, low pressure cylinder spray regulating valve interlocking unlatching protection, low pressure cylinder spray regulating valve cuts manual protection automatically and DCS sends out acousto-optic
Alarm is protected.
Halt turbines are protected：When intermediate pressure cylinder the first intermediate pressure cylinder exhaust steam pressure sensor and the second intermediate pressure cylinder exhaust steam pressure pass
Sensor exhaust steam pressure signal 2 takes 2 and exhaust steam pressure >=1.1MPa, signal to reach dcs DCS, distributed AC servo system system
System DCS, which sends out instruction, makes Steam Turbine's Main Vaper Valve, septum valve and reheat control valve close；Extraction stop valve, extraction check valve
Regulating valve is closed with steam extraction speed to close；Hydraulic butterfly valve and cooling steam regulating valve are opened；Steam turbine, which is closed into vapour, makes steam turbine stop
Operation；
When steam turbine trip operation or electricity hypervelocity OPC actions or generator tripping act, hydraulic butterfly valve is opened in interlocking；
Intermediate pressure cylinder exhaust steam pressure height is protected：Intermediate pressure cylinder the first intermediate pressure cylinder exhaust steam pressure sensor and the second intermediate pressure cylinder exhaust steam pressure pass
Sensor exhaust steam pressure signal is to dcs DCS, when the first intermediate pressure cylinder exhaust steam pressure sensor and the second intermediate pressure cylinder are arranged
Vapour pressure force snesor exhaust steam pressure signal 2 takes 2 and exhaust steam pressure >=0.85MPa, dcs DCS instruction interlockings to open
Open hydraulic butterfly valve；
Main steam flow minimum living is protected：When main steam flow≤380t/h, signal to dcs DCS, DCS instruction interlockings
It opens hydraulic butterfly valve, interlocking close extraction stop valve, extraction check valve and steam extraction speed and closes regulating valve；
Extraction line valve accidentally closes interlock protection：Regulating valve, which is closed, when extraction stop valve or extraction check valve or steam extraction speed closes letter
Number to dcs DCS, hydraulic butterfly valve is opened in dcs DCS instruction interlockings；
Hydraulic butterfly valve, which allows to close, to be protected：It has opened to have opened with extraction check valve in extraction stop valve and has closed control valve position with steam extraction speed
>=30% and intermediate pressure cylinder turbine pressure ratio between 3.9 and 4.2 when, dcs DCS instruction hydraulic butterfly valve allows to close extremely
Valve position ＜ 15%；
Steam extraction speed closes the small protection of control valve position：When hydraulic butterfly valve valve position ＜ 3% and steam extraction speed close control valve position ＜ 30%, point
Hydraulic butterfly valve is opened in the DCS instruction interlockings of cloth control system；
Extraction stop valve, which allows to close, to be protected：It is distributed as main steam flow ＞ 380t/h and hydraulic butterfly valve valve position ＞ 50%
Control system DCS instructions allow that extraction stop valve is turned off manually；
Extraction check valve, which allows to close, to be protected：It is distributed as main steam flow ＞ 380t/h and hydraulic butterfly valve valve position ＞ 50%
Control system DCS instructions allow that extraction check valve is turned off manually；
Steam extraction speed, which closes regulating valve, to be allowed to close protection：As main steam flow ＞ 380t/h and hydraulic butterfly valve valve position ＞ 15%, point
The DCS instructions of cloth control system allow to be turned off manually steam extraction speed pass regulating valve to 30% or less；
Protection is opened in the cooling steam regulating valve interlocking of low pressure (LP) cylinder：When hydraulic butterfly valve valve position≤15%, the cold of low pressure (LP) cylinder is opened in interlocking
But steam control valve, cooling steam flow are adjusted to 20t/h；
The cooling steam regulating valve interlocking close of low pressure (LP) cylinder is protected：As hydraulic butterfly valve valve position ＞ 15%, interlocking close low pressure (LP) cylinder it is cold
But steam control valve；
Protection is opened in the interlocking of low pressure cylinder spray regulating valve：When low pressure (LP) cylinder electricity end and adjust six, end any temperature >=80 of exhaust temperature
DEG C, low pressure cylinder spray regulating valve is opened in dcs DCS instruction interlockings, and spray flow is adjusted to 20t/h；
Low pressure cylinder spray regulating valve cuts manual protection automatically：When the instruction of low pressure cylinder spray regulating valve is more than ± 20% with feedback deviation
Or the damage of low pressure cylinder spray regulating valve feedback or low pressure (LP) cylinder electricity end and when end exhaust temperature signal 6 being adjusted to take 3 damage, distribution control
System DCS instructions processed allow low pressure cylinder spray regulating valve to cut automatically manually.
The alarm and protection of the dcs DCS：
（1）Temperature after low pressure (LP) cylinder exhaust stage blade or any temperature of low pressure (LP) cylinder center housing temperature>120 DEG C, dcs DCS
Send out sound-light alarm prompt protection；
（2）When mesolow connecting pipe hydraulic butterfly valve failure, dcs DCS sends out sound-light alarm prompt protection；
（3）Intermediate pressure cylinder turbine pressure ratio >=4.2, dcs DCS send out sound-light alarm prompt protection；
（4）Intermediate pressure cylinder turbine pressure ratio≤3.9, dcs DCS send out sound-light alarm prompt protection；
（5）Intermediate pressure cylinder exhaust temperature >=380 DEG C, dcs DCS send out sound-light alarm prompt protection；
（6）Intermediate pressure cylinder exhaust steam pressure >=0.85MPa, dcs DCS send out sound-light alarm prompt protection；
（7）Heat exchangers for district heating liquid level L >=300mm, dcs DCS send out sound-light alarm prompt protection；
（8）Low pressure cylinder spray regulating valve is cut manually automatically, and dcs DCS sends out sound-light alarm prompt protection.
Advantage and effect：
The safety protection system and method for fired power generating unit excision low pressure (LP) cylinder operation proposed by the present invention, advantage are as follows：
Compared with prior art, the present invention reduces the throttle flow of low pressure (LP) cylinder by the hydraulic butterfly valve on closing mesolow steam guiding tube,
Realize the target for increasing heat capacity and reducing unit output.Low pressure (LP) cylinder cooling steam is increased on safety system with band
The air blast heat for walking the low pressure (LP) cylinder exhaust stage blade in the case where cutting cylinder state passes through the vapor (steam) temperature measuring point after increase exhaust stage blade, monitoring
Low pressure (LP) cylinder exhaust temperature ensures model of the temperature control in safety of low pressure (LP) cylinder by increasing low pressure (LP) cylinder automatic water jetting regulating system
In enclosing.On method for security protection, high voltage adjusting valve opening, steam extraction quick-closing valve aperture and hydraulic butterfly valve aperture are rationally controlled,
Protecting steam turbine that intermediate pressure cylinder exhaust steam pressure does not occur transfinites（It is too high or too low）, the water erosion of low pressure (LP) cylinder exhaust stage blade, flutter do not occur
Etc. accidents occur.When unit breaks down, quick closedown steam turbine into porthole, quickly open hydraulic butterfly valve and cooling steam tune
The measures such as valve are saved, ensure that unit safety is shut down.
Description of the drawings
Fig. 1 is present system structure diagram；
Fig. 2 is the block diagram after present system structure connection dcs DCS；
Fig. 3 is hydraulic butterfly valve interlocking unlocking condition logic chart；
Fig. 4 is that hydraulic butterfly valve closes enabled condition logic chart；
Fig. 5 is extraction stop valve closedown condition logic chart；
Fig. 6 is extraction check valve closedown condition logic chart；
Fig. 7 is that steam extraction speed closes regulating valve interlocking close conditional logic figure；
Fig. 8 is that the interlocking of low pressure (LP) cylinder cooling steam regulating valve opens and closes conditional logic figure；
Fig. 9 is low pressure cylinder spray regulating valve interlocking unlocking condition logic chart；
Figure 10 is low pressure cylinder spray regulating valve interlocking close conditional logic figure；
Figure 11 is that low pressure cylinder spray regulating valve cuts manual logic chart automatically；
Figure 12 is that dcs DCS sends out sound and light alarm signal conditional logic figure；
Figure 13 is that hydraulic butterfly valve failure is sent to dcs DCS signal logic figures.
Reference sign：
1. hydraulic butterfly valve, 2. cooling steam regulating valves, 3. extraction stop valves, 4. extraction check valves, 5. steam extraction speed close regulating valve, 6.
Steam Turbine's Main Vaper Valve, 7. septum valves, 8. reheat control valves, 9. low pressure cylinder spray regulating valves, 10. reheated steam pressure sensings
Device, 11. first intermediate pressure cylinder exhaust steam pressure sensors, 12. second intermediate pressure cylinder exhaust steam pressure sensors, 13. low pressure (LP) cylinder initial steam pressures
Sensor, 14. intermediate pressure cylinder exhaust temperature thermocouples, 15. low pressure (LP) cylinder throttle (steam) temperature thermocouples, 16. first low pressure (LP) cylinder exhaust stage blades
Afterwards adjust end thermal resistance, the tune end thermal resistance after 17. second low pressure (LP) cylinder exhaust stage blades, after 18. first low pressure (LP) cylinder exhaust stage blades
The thermoelectricity of electric end thermal resistance, 20. low pressure (LP) cylinder cylinder body tune end temperature after electric end thermal resistance, 19. second low pressure (LP) cylinder exhaust stage blades
Resistance, the thermal resistance of 21. low pressure (LP) cylinder cylinder body electricity end temperature, 22. flow measurement devices, 23. cooling steam flow measuring devices, 24.
Extraction flow measuring device, the sensor of 25. low pressure cylinder spray flows, 26. generator power sensors, 27. electricity hypervelocity OPC,
28. steam turbine tripping, 29. generator trippings, 30. dcs DCS, 31. water level sensors, 32. high pressure cylinders, 33.
Intermediate pressure cylinder, 34. low pressure (LP) cylinders, 35. heat exchangers for district heatings, 36. cooling water inlets, 37. condensers.
Specific implementation mode
Following further describes the present invention with reference to the drawings：
As shown in Figure 1, the present invention provides the safety system of fired power generating unit excision low pressure (LP) cylinder operation, including thermoelectric generator
The boiler export of group, thermal power generation unit is communicated with high pressure cylinder 32 by pipeline, is connected to the pipeline of boiler export and high pressure cylinder 32
Equipped with flow measurement device 22, Steam Turbine's Main Vaper Valve 6 and septum valve 7, gland steam exhauster, that is, intermediate pressure cylinder of high pressure cylinder 32 into vapour
Pipeline is connected by boiler and with intermediate pressure cylinder 33, and the steam inlet pipe road of intermediate pressure cylinder 33 is equipped with reheat control valve 8, and intermediate pressure cylinder 33 is logical
It crosses mesolow connecting pipe to be connected to low pressure (LP) cylinder 34, mesolow connecting pipe is equipped with hydraulic control between intermediate pressure cylinder 33 and low pressure (LP) cylinder 34
Butterfly valve 1, low pressure (LP) cylinder steam drain are equipped with condenser 37, and the outlet of condenser 37 is connected with heat regenerative system, and heat regenerative system is connected with boiler
Form closed circulation system；Steam turbine senior middle school low pressure rotor is connected with generator amature, and steam expansion work in steam turbine makes
Rotor rotation drives electrical power generators；Mesolow connecting pipe is also communicated with extraction line, and the extraction line other end is communicated with heat
The intermediate pressure cylinder steam discharge of net heater 35, steam turbine enters heat exchangers for district heating heating, and extraction line is in intermediate pressure cylinder 33 and heat supply network
It is equipped with extraction stop valve 3, extraction check valve 4, steam extraction speed between heater 35 and closes regulating valve 5 and extraction flow measuring device 24,
Heat exchangers for district heating 35 is also associated with water level sensor 31, and heat exchangers for district heating is hydrophobic to be connected with closed circulation system, heat supply network heating
Closed circulation system is returned after hydrophobic 31 reasonable water level control by water level sensor of device；Steam Turbine's Main Vaper Valve 6, septum valve
7 and reheat control valve 8 all 28 connect with steam turbine tripping；The generator tripping 29 of generator interlocks steam turbine tripping 28；Electricity is super
Fast OPC 27 shares 4 solenoid valves, wherein 2 are connected with septum valve 7,2 are connected with reheat control valve 8；Intermediate pressure cylinder 33
Steam inlet pipe road be additionally provided with reheated steam pressure sensor 10, low pressure (LP) cylinder 34 is additionally provided with the thermal resistance of low pressure (LP) cylinder cylinder body tune end temperature
20 and thermal resistance 21, the generator of low pressure (LP) cylinder cylinder body electricity end temperature be additionally provided with power sensor 26.Intermediate pressure cylinder and low pressure (LP) cylinder it
Between be also communicated with low pressure (LP) cylinder cooling steam system, low pressure (LP) cylinder cooling steam system includes cooling steam regulating valve 2 and cooling steam
Flow measurement device 23, intermediate pressure cylinder 33 is equipped with the first intermediate pressure cylinder exhaust steam pressure sensor 11, the second intermediate pressure cylinder exhaust steam pressure senses
Device 12 and intermediate pressure cylinder exhaust temperature thermocouple 14, low pressure (LP) cylinder 34 are equipped with low pressure (LP) cylinder initial steam pressure sensor 13, low pressure (LP) cylinder into steam temperature
Spend the tune end thermoelectricity adjusted after end thermal resistance 16, the second low pressure (LP) cylinder exhaust stage blade after thermocouple 15, the first low pressure (LP) cylinder exhaust stage blade
Hinder the electric end thermal resistance 19 after the 18 and second low pressure (LP) cylinder exhaust stage blade of electric end thermal resistance after the 17, first low pressure (LP) cylinder exhaust stage blade；
Low pressure (LP) cylinder 34 is also communicated with low pressure cylinder spray temperature reducing system, and low pressure cylinder spray temperature reducing system includes cooling water inlet 36, low pressure (LP) cylinder
The sensor 25 of spray water control valve 9 and low pressure cylinder spray flow.
As shown in Fig. 2, dcs DCS 30 customary in the art passes through cable and hydraulic butterfly valve 1, cooling steaming
Steam control valve 2, extraction stop valve 3, extraction check valve 4, steam extraction speed close regulating valve 5, Steam Turbine's Main Vaper Valve 6, septum valve 7,
Reheat control valve 8, low pressure cylinder spray regulating valve 9, reheated steam pressure sensor 10, the first intermediate pressure cylinder exhaust steam pressure sensor
11, the second intermediate pressure cylinder exhaust steam pressure sensor 12, low pressure (LP) cylinder initial steam pressure sensor 13, intermediate pressure cylinder exhaust temperature thermocouple 14,
Tune end thermal resistance 16, the second low pressure (LP) cylinder exhaust stage blade after low pressure (LP) cylinder throttle (steam) temperature thermocouple 15, the first low pressure (LP) cylinder exhaust stage blade
Afterwards adjust end thermal resistance 17, the electric end thermal resistance 18 after the first low pressure (LP) cylinder exhaust stage blade, the electricity after the second low pressure (LP) cylinder exhaust stage blade
Hold thermal resistance 19, the thermal resistance 20 of low pressure (LP) cylinder cylinder body tune end temperature, the thermal resistance 21 of low pressure (LP) cylinder cylinder body electricity end temperature, flow measurement
Device 22, cooling steam flow measuring device 23, extraction flow measuring device 24, the sensor 25 of low pressure cylinder spray flow, hair
Power of motor sensor 26, electricity hypervelocity OPC 27, steam turbine tripping 28, generator tripping 29 are connected with water level sensor 31.
The main steam of boiler export enters height after flow measurement device 22, Steam Turbine's Main Vaper Valve 6 and septum valve 7
32 flow passage component expansion work of cylinder pressure, the steam discharge of high pressure cylinder 32 enter after the reheated device heating of boiler by reheat control valve 8 into
Enter 33 flow passage component expansion work of intermediate pressure cylinder, the steam discharge of intermediate pressure cylinder 33 enters low pressure by mesolow communicating pipe and hydraulic butterfly valve 1
34 expansion work of cylinder, 34 steam discharge of low pressure (LP) cylinder enter the condensation of condenser 37, and condensed water is after heat regenerative system heats, with high temperature and pressure
Water supply form enters boiler heating, forms closed circulation system.Steam turbine senior middle school low pressure rotor is connected with generator amature, steam
Expansion work makes rotor rotation drive electrical power generators in steam turbine.Heating Period draws steam by taking out by 33 steam discharge of intermediate pressure cylinder
Vapour shut-off valve 3, extraction check valve 4, steam extraction speed enter heat exchangers for district heating 35 after closing regulating valve 5 and extraction flow measuring device 24,
Steam is after the condensation of heat exchangers for district heating 35, by returning to unit after water level sensor 31 rationally control.28 control of steam turbine tripping
Steam Turbine's Main Vaper Valve 6, septum valve 7 and reheat control valve 8 are closed；Generator tripping 29 interlocks steam turbine tripping 28；Electricity is super
27 protection locations of fast OPC share 4 solenoid valves, wherein 2 are connected with septum valve 7,2 are connected with reheat control valve 8；
Dcs DCS 30 is scattered control system, is independently mounted at the central control room of power plant, passes through cable and unit
Each sensor, valve and control unit are connected.The thermal resistance of reheated steam pressure sensor 10, low pressure (LP) cylinder cylinder body tune end temperature
20, the thermal resistance 21, generator power sensor 26 of low pressure (LP) cylinder cylinder body electricity end temperature, be the original measuring point of unit.
The control butterfly valve with mechanical position limitation on former low pressure (LP) cylinder steam inlet pipe road is transform as and can be completely closed by the present invention
Hydraulic butterfly valve 1, it is zero to make generated output of the low pressure (LP) cylinder 34 in unit operation, and the intermediate pressure cylinder steam discharge of steam turbine is completely used for adopting
Warm heat supply.In order to reduce the air blast heating temperature of low pressure (LP) cylinder blade, in intermediate pressure cylinder steam discharge to low pressure (LP) cylinder into installing low pressure between vapour additional
Cylinder cooling steam system is mounted with cooling steam regulating valve 2 and cooling steam flow measuring device 23, the first intermediate pressure cylinder steam discharge pressure
Force snesor 11, the second intermediate pressure cylinder exhaust steam pressure sensor 12 and intermediate pressure cylinder exhaust temperature thermocouple 14, low pressure (LP) cylinder 34 are equipped with low
Cylinder pressure initial steam pressure sensor 13, low pressure (LP) cylinder throttle (steam) temperature thermocouple 15；To monitor low pressure (LP) cylinder exhaust temperature, in low pressure (LP) cylinder final stage
The tune end thermoelectricity adjusted after end thermal resistance 16, the second low pressure (LP) cylinder exhaust stage blade after the first low pressure (LP) cylinder exhaust stage blade is mounted with after blade
Hinder the electric end thermal resistance 19 after the 18 and second low pressure (LP) cylinder exhaust stage blade of electric end thermal resistance after the 17, first low pressure (LP) cylinder exhaust stage blade；
To prevent low pressure (LP) cylinder overtemperature, low pressure cylinder spray temperature reducing system is transformed, has been mounted with low pressure cylinder spray regulating valve 9 and low pressure cylinder spray
The sensor 25 of flow.
A kind of fired power generating unit excision low pressure (LP) cylinder operation as mentioned, i.e. stop valve 6 and reheat control valve 8 are opened, high pressure tune
It saves valve 7 and appropriate location is opened according to generator power demand, the difference with original system is that hydraulic butterfly valve 1 completely closes, cooling to steam
Steam control valve 2 is opened, and steam extraction speed closes regulating valve 5 according to heat demand unlatching appropriate location, and low pressure cylinder spray regulating valve 9 is opened；
The method for security protection of its safety system includes the interlocked operation process of one or more guard methods, guard method packet
It includes：Halt turbines protection, steam turbine tripping interlock protection, OPC actions interlock protection, generator tripping interlock protection, middle pressure
The protection of cylinder exhaust steam pressure height, main steam flow minimum living shield, extraction line valve accidentally closes interlock protection, steam extraction speed closes regulating valve valve
The small protection in position, hydraulic butterfly valve, which allow closing to protect, extraction stop valve allows closing protection, steam extraction speed to close regulating valve allows closing guarantor
Shield, the interlocking of the cooling steam regulating valve of low pressure (LP) cylinder open protection, the cooling steam regulating valve interlocking close protection of low pressure (LP) cylinder, low pressure
Protection is opened in the interlocking of cylinder spray water control valve, low pressure cylinder spray regulating valve cuts manual protection automatically and DCS sends out sound-light alarm prompt
Protection.
Halt turbines are protected：When 33 first intermediate pressure cylinder exhaust steam pressure sensor 11 of intermediate pressure cylinder and the second intermediate pressure cylinder steam discharge pressure
12 discharge pressure signal 2 of force snesor takes 2 and exhaust steam pressure >=1.1MPa, signal to reach dcs DCS 30, point
Cloth control system DCS 30, which sends out instruction, makes Steam Turbine's Main Vaper Valve 6, septum valve 7 and reheat control valve 8 close；Steam extraction is cut
Only valve 3, extraction check valve 4 and steam extraction speed are closed regulating valve 5 and are closed；Hydraulic butterfly valve 1 and cooling steam regulating valve 2 are opened；Steam turbine
Closing into vapour keeps steam turbine out of service.
When 28 action of steam turbine tripping or electricity hypervelocity OPC27 actions or generator tripping 29 act, hydraulic control butterfly is opened in interlocking
Valve 1；
Intermediate pressure cylinder exhaust steam pressure height is protected：33 first intermediate pressure cylinder exhaust steam pressure sensor 11 of intermediate pressure cylinder and the second intermediate pressure cylinder steam discharge pressure
12 discharge pressure signal 2 of force snesor takes 2 and exhaust steam pressure >=0.85MPa, the instruction interlockings of dcs DCS 30 to open
Open hydraulic butterfly valve 1；
Main steam flow minimum living is protected：When main steam flow≤380t/h, signal to dcs DCS 30, DCS instructions
Hydraulic butterfly valve 1 is opened in interlocking, and interlocking close extraction stop valve 3, extraction check valve 4 and steam extraction speed close regulating valve 5；
Extraction line valve accidentally closes interlock protection：Regulating valve 5 is closed when extraction stop valve 3 or extraction check valve 4 or steam extraction speed to close
It closes, signal to dcs DCS 30, hydraulic butterfly valve 1 is opened in the instruction interlockings of dcs DCS 30；
Hydraulic butterfly valve, which allows to close, to be protected：It has opened to have opened with extraction check valve 4 in extraction stop valve 3 and has closed regulating valve 5 with steam extraction speed
When between 3.9 to 4.2, dcs DCS 30 instructs hydraulic butterfly valve 1 for valve position >=30% and 33 turbine pressure ratio of intermediate pressure cylinder
Allow to close to valve position ＜ 15%；
Steam extraction speed closes the small protection of control valve position：When 1 valve position ＜ 3% of hydraulic butterfly valve and steam extraction speed close 5 valve position ＜ 30% of regulating valve,
Hydraulic butterfly valve 1 is opened in the instruction interlockings of dcs DCS 30；
Extraction stop valve, which allows to close, to be protected：As main steam flow ＞ 380t/h and 1 valve position ＞ 50% of hydraulic butterfly valve, distribution
The instructions of formula control system DCS 30 allow that extraction stop valve 3 is turned off manually；
Extraction check valve, which allows to close, to be protected：As main steam flow ＞ 380t/h and 1 valve position ＞ 50% of hydraulic butterfly valve, distribution
The instructions of formula control system DCS 30 allow that extraction check valve 4 is turned off manually；
Steam extraction speed, which closes regulating valve, to be allowed to close protection：As main steam flow ＞ 380t/h and 1 valve position ＞ 15% of hydraulic butterfly valve,
The instructions of dcs DCS 30 allow that 5 to 30% or less regulating valve of steam extraction speed pass is turned off manually；
Protection is opened in the cooling steam regulating valve interlocking of low pressure (LP) cylinder：When 1 valve position≤15% of hydraulic butterfly valve, low pressure (LP) cylinder is opened in interlocking
Cooling steam regulating valve 2, cooling steam flow are adjusted to 20t/h；
The cooling steam regulating valve interlocking close of low pressure (LP) cylinder is protected：As 1 valve position ＞ 15% of hydraulic butterfly valve, interlocking close low pressure (LP) cylinder
Cooling steam regulating valve 2；
Protection is opened in the interlocking of low pressure cylinder spray regulating valve：When low pressure (LP) cylinder electricity end and adjust six, end any temperature >=80 of exhaust temperature
DEG C, low pressure cylinder spray regulating valve 9 is opened in the instruction interlockings of dcs DCS 30, and spray flow is adjusted to 20t/h；
Low pressure cylinder spray regulating valve cuts manual protection automatically：When the instruction of low pressure cylinder spray regulating valve 9 is more than ± 20% with feedback deviation
Or the damage of the feedback of low pressure cylinder spray regulating valve 9 or low pressure (LP) cylinder electricity end and when end exhaust temperature signal 6 being adjusted to take 3 damage, it is distributed
The instructions of control system DCS 30 allow low pressure cylinder spray regulating valve 9 to cut automatically manually.
The alarm and protection of the dcs DCS 30：
（1）Temperature after low pressure (LP) cylinder exhaust stage blade or any temperature of low pressure (LP) cylinder center housing temperature>120 DEG C, dcs DCS
30 send out sound-light alarm prompt protection；
（2）When 1 failure of mesolow connecting pipe hydraulic butterfly valve, dcs DCS 30 sends out sound-light alarm prompt and protects
Shield；
（3）33 turbine pressure ratio >=4.2 of intermediate pressure cylinder, dcs DCS 30 send out sound-light alarm prompt protection；
（4）33 turbine pressure ratio≤3.9 of intermediate pressure cylinder, dcs DCS 30 send out sound-light alarm prompt protection；
（5）33 exhaust temperature >=380 DEG C of intermediate pressure cylinder, dcs DCS 30 send out sound-light alarm prompt protection；
（6）33 exhaust steam pressures of intermediate pressure cylinder >=0.85MPa, dcs DCS 30 send out sound-light alarm prompt protection；
（7）Heat exchangers for district heating 35 liquid level L >=300mm, dcs DCS 30 send out sound-light alarm prompt protection；
（8）Low pressure cylinder spray regulating valve 9 is cut manually automatically, and dcs DCS 30 sends out sound-light alarm prompt protection.
As shown in figure 3, protection is opened in hydraulic butterfly valve interlocking：The cylinder method of operation is cut when unit is in low pressure (LP) cylinder, hydraulic control at this time
Butterfly valve is turned off, if extraction stop valve is closed or extraction check valve is closed, turbine discharge access denial, steam turbine will be forced to stop
Machine, therefore when extraction stop valve closure signal or extraction check valve closure signal feed back to dcs DCS, distribution
Formula control system DCS sends out command signal and quickly opens hydraulic butterfly valve；When electricity hypervelocity OPC action, signal enable septum valve and
Reheat control valve is closed；When steam turbine trip signal enables Steam Turbine's Main Vaper Valve, septum valve, reheat control valve close；Work as hair
Motor trip signal enables Steam Turbine's Main Vaper Valve close, and steam turbine has been enter into shutdown mode, dcs DCS instructions at this time
Extraction stop valve and extraction check valve and steam extraction speed close regulating valve closing, distributed to keep flow passage component in steam turbine unimpeded
Control system DCS, which sends out command signal, makes hydraulic butterfly valve quickly open；When intermediate pressure cylinder exhaust steam pressure（P(11)With P(12)）≥
0.85MPa（P(11)Represent the first intermediate pressure cylinder exhaust steam pressure, P(12)The second intermediate pressure cylinder exhaust steam pressure is represented, pressure signal 2 takes 2）,
Turbine Safety will be jeopardized, dcs DCS, which sends out command signal, makes hydraulic butterfly valve quickly open, make steam rapidly into
Enter low pressure (LP) cylinder, reduces intermediate pressure cylinder exhaust steam pressure P(11)And P(12)；When steam extraction speed closes control valve position ＜ 30%, show extraction flow
G(24)It reduces, to keep unit generation load W(26)Constant, dcs DCS, which sends out command signal, keeps hydraulic butterfly valve fast
Speed is opened；As main steam flow G(22)When≤380t/h and hydraulic butterfly valve valve position ＞ 1015%, low pressure (LP) cylinder steam flow is likely to be at
Make exhaust stage blade that serious air blast even blade flutter region occur, jeopardize blade safety, dcs DCS sends out instruction
Signal makes hydraulic butterfly valve quickly open.
It is protected as shown in figure 4, hydraulic butterfly valve allows to close：When unit is in the operation of steam extraction and condensing state, if power grid refers to
Enabling reduces generation load W(26), ensureing confession heat flow G(24)Under conditions of, then it needs to cut off low pressure (LP) cylinder operation, at this point, by dividing
Cloth control system DCS detection extraction stop valve standard-sized sheet signals and extraction check valve standard-sized sheet signal and steam extraction speed close control valve position
Feedback signal >=30% while calculating intermediate pressure cylinder turbine pressure ratio（P(11)/P(10)And P(12)/P(10)）When ＜ is between 3.9 and 4.2,
（P(10)Represent the first intermediate pressure cylinder initial steam pressure）It is 0 to enable hydraulic butterfly valve close instruction manually, and final stage is evaded in hydraulic butterfly valve quick closedown
The danger zone of air blast or flutter occurs for blade.
As shown in figure 5, the chain closing protection of extraction stop valve：When unit exists in the operation of steam extraction and condensing state or unit
When cutting off the low pressure (LP) cylinder method of operation, if electricity hypervelocity OPC actuating signals come or steam turbine trip signal comes or generator tripping signal
Come, steam turbine is made to enter shutdown mode, causes Steam Turbine Over-speed Accident dangerous to prevent the steam of extraction line from returning to steam turbine, point
Cloth control system DCS sends out instruction and enables extraction stop valve interlocking close；As main steam flow G(22)≤ 380t/h and hydraulic control butterfly
When valve valve position ＞ 15%, dcs DCS, which sends out instruction, enables extraction stop valve close, that is, stops external heat supply, while such as
The interlocking of hydraulic butterfly valve shown in Fig. 3 quickly opens ambassador's steam and enters low pressure (LP) cylinder to protect blade safe.
If as shown in figure 5, wanting that extraction stop valve is turned off manually, precondition is hydraulic pressure butterfly valve valve position >=50%, otherwise in
Cylinder pressure steam discharge may be obstructed, and cause exhaust steam pressure P(11)With P(12)It increases, jeopardizes Turbine Safety.
As shown in fig. 6, extraction check valve interlocking close is protected：When unit exists in the operation of steam extraction and condensing state or unit
When cutting off the low pressure (LP) cylinder method of operation, if electricity hypervelocity OPC actuating signals come or steam turbine trip signal comes or generator tripping signal
Come, steam turbine is made to enter shutdown mode, causes Steam Turbine Over-speed Accident dangerous to prevent the steam of extraction line from returning to steam turbine, point
Cloth control system DCS sends out instruction and enables extraction check valve interlocking close；As main steam flow G(22)≤ 380t/h and hydraulic control butterfly
When valve valve position ＞ 15%, dcs DCS, which sends out instruction, enables extraction stop valve close, and stops external heat supply, while as schemed
The interlocking of hydraulic butterfly valve shown in 3 quickly opens ambassador's steam and enters low pressure (LP) cylinder to protect blade safe.
If as shown in fig. 6, wanting that extraction check valve is turned off manually, precondition is hydraulic pressure butterfly valve valve position >=50%, otherwise in
Cylinder pressure steam discharge may be obstructed, and exhaust steam pressure is caused to increase, and jeopardize Turbine Safety.
As shown in fig. 7, steam extraction speed closes the protection of regulating valve interlocking close：When unit is in the operation of steam extraction and condensing state, Huo Zheji
Group is when cutting off the low pressure (LP) cylinder method of operation, if electricity hypervelocity OPC actuating signals come or steam turbine trip signal comes or generator tripping
Signal comes, and makes halt turbines, causes Steam Turbine Over-speed Accident dangerous to prevent the steam of extraction line from returning to steam turbine, distributed
Control system DCS, which sends out instruction, enables steam extraction speed close regulating valve interlocking close；As main steam flow G(22)≤ 380t/h and hydraulic control butterfly
When valve valve position ＞ 15%, dcs DCS, which sends out instruction, enables steam extraction speed close regulating valve interlocking close, stops external heat supply,
The quick ambassador's steam of opening of hydraulic butterfly valve interlocking enters low pressure (LP) cylinder to protect blade safe as shown in Figure 3 simultaneously.
If as shown in fig. 7, wanting that steam extraction speed, which is turned off manually, closes regulating valve to 30% hereinafter, its precondition is hydraulic pressure butterfly valve valve
Position ＞ 15%, otherwise intermediate pressure cylinder steam discharge may be obstructed, cause exhaust steam pressure to increase, jeopardize Turbine Safety.
As shown in figure 8, the chain opening and closing protection of cooling steam regulating valve：When hydraulic pressure butterfly valve valve position≤1015%, show
Low pressure (LP) cylinder is close to cylinder operating status is cut, and low pressure (LP) cylinder needs to be passed through certain cooling steam amount at this time, it is therefore an objective to by low-pressure final stage leaf
The air blast heat of piece is taken away, and enables the interlocking of low pressure (LP) cylinder cooling steam regulating valve open at this point, dcs DCS sends out instruction
It opens, cooling steam flow G is kept by monitoring the signal of cooling steam flow sensor(23)For 20t/h or so.
As shown in figure 8, working as hydraulic pressure butterfly valve valve position ＞ 15%, show that low pressure (LP) cylinder throttle flow is larger, the steam flow of low pressure (LP) cylinder can
To avoid the danger zone flow of exhaust stage blade, dcs DCS allows low pressure (LP) cylinder cooling steam regulating valve to join at this time
Lock is closed.
As shown in figure 9, the interlocking of low pressure cylinder spray regulating valve is opened：As low pressure (LP) cylinder electricity end t(16), electricity end t(17), electric end
t(20), adjust end t(18), adjust end t(19), adjust end t(21)80 DEG C of any temperature ＞ of six exhaust temperatures, shows last stage vane of steam turbine
Air blast occurs, air blast can cause low pressure (LP) cylinder temperature to increase, and there are risk of distortion for low pressure (LP) cylinder, can also make exhaust stage blade or penult leaf
Flutter occurs for piece, jeopardizes blade safety, and dcs DCS, which sends out instruction, enables the interlocking of low pressure cylinder spray regulating valve open,
Adjust low pressure cylinder spray flow G(22)For 25t/h or so, low pressure (LP) cylinder temperature is reduced by water spray.
As shown in Figure 10, low pressure cylinder spray regulating valve interlocking close：As low pressure (LP) cylinder electricity end t(16), electricity end t(17), electric end
t(20), adjust end t(18), adjust end t(19), adjust end t(21)Six 80 DEG C of exhaust temperature whole temperature ＜, according to regulatory requirements, to vapour
Turbine does not have security risk, dcs DCS to send out instruction and enable low pressure cylinder spray regulating valve interlocking close.
As shown in figure 11, low pressure cylinder spray regulating valve permission cuts manual protection automatically：If wanting to make low pressure cylinder spray regulating valve
It is cut manually from automatic, precondition one is that the instruction of low pressure cylinder spray regulating valve is more than ± 20% with feedback deviation, shows to control automatically
System is inaccurate；Second is that low pressure cylinder spray regulating valve feedback command damages, water spray can not be automatically adjusted；Third, the first low pressure (LP) cylinder is last
The heat of the tune end thermal resistance after tune end thermal resistance, the second low pressure (LP) cylinder exhaust stage blade, low pressure (LP) cylinder cylinder body tune end temperature after grade blade
The electric end thermal resistance after electric end thermal resistance, the second low pressure (LP) cylinder exhaust stage blade, low pressure (LP) cylinder after resistance, the first low pressure (LP) cylinder exhaust stage blade
The thermal resistance of cylinder body electricity end temperature（6 take 3）Bad, system can wouldn't automatically participate in adjusting, and need artificially to manually control low to ensure
Cylinder pressure temperature is no more than 80 DEG C.
As shown in figure 12, as low pressure (LP) cylinder electricity end t(16), electricity end t(17), electricity end t(20), adjust end t(18), adjust end t(19), adjust end
t(21)Six any temperature of exhaust temperature>120 DEG C, there are low pressure (LP) cylinder deformation or rotor impact and rub risk, distributed AC servo system systems
System DCS sends out sound-light alarm, and prompting operations staff's concern, whether low pressure cylinder spray system puts into, low pressure (LP) cylinder cooling steam system is
No input, the factors such as whether condenser vacuum normal, confirm low pressure (LP) cylinder exhaust temperature >=120 DEG C through comprehensive descision, should take hand
It is dynamic to beat gate stop-start.
As shown in figure 12, when intermediate pressure cylinder turbine pressure ratio（P(11)/P(10)And P(12)/P(10)）>=4.2, there are intermediate pressure cylinder final stages
Blade pressure difference increases, and there are the risk of blade fatigue damage, dcs DCS sends out sound-light alarm, prompts operation
Personnel pay close attention to whether main steam flow is low, whether the fast pass control valve opening of steam extraction is big.
As shown in figure 12, when intermediate pressure cylinder turbine pressure ratio（P(11)/P(10)And P(12)/P(10)）≤ 3.9, there are intermediate pressure cylinder steam discharges
The risk that temperature increases, dcs DCS send out sound-light alarm, prompt whether operations staff pays close attention to intermediate pressure cylinder steam discharge
Whether high, IP efficiency reduces.
As shown in figure 12, middle pressure stripping temperature t(14)Or low pressure (LP) cylinder intake air temperature t(15)380 DEG C of ＞, dcs
DCS sends out sound-light alarm, and whether prompt operations staff's concern intermediate pressure cylinder steam discharge is high, whether IP efficiency reduces.
As shown in figure 12, as intermediate pressure cylinder exhaust steam pressure P(11)With P(12)＞ 0.85MPa, dcs DCS send out sound
Light is alarmed, and prompting operations staff to pay close attention to, heat supply speed closes regulating valve and whether hydraulic butterfly valve aperture is correct.
As shown in figure 12, when low pressure cylinder spray regulating valve is cut manually automatically, dcs DCS sends out acousto-optic report
It is alert, prompt operations staff to keep a close eye on low pressure (LP) cylinder exhaust temperature.
As shown in figure 12, heat exchangers for district heating liquid level L >=300mm, dcs DCS send out sound-light alarm, prompt
The operation conditions of the close heat exchangers for district heating of operations staff.
As shown in figure 13, when hydraulic butterfly valve failure (1# sensor faults, 2# sensor faults, input signal failure, control
Power loss, motor overload, electrical source of power dead electricity, oil strain block, oil level is too low, hydraulic fault, 1 road power loss, 2 road power supplys
Dead electricity) signal is sent to dcs DCS, and dcs DCS sends out sound-light alarm, prompts operations staff couple
Failure is handled in time.
Claims (6)
1. fired power generating unit cuts off the safety system of low pressure (LP) cylinder operation, it is characterised in that：Including thermal power generation unit, firepower hair
The boiler export of motor group is communicated with high pressure cylinder by pipeline, and the pipeline for being connected to boiler export and high pressure cylinder is filled equipped with flow measurement
It sets, Steam Turbine's Main Vaper Valve and septum valve, the gland steam exhauster of high pressure cylinder is connected by boiler and with intermediate pressure cylinder, as middle pressure
The steam inlet pipe road in the steam inlet pipe road of cylinder, intermediate pressure cylinder is equipped with reheat control valve, and intermediate pressure cylinder passes through mesolow connecting pipe and low pressure (LP) cylinder
Connection, mesolow connecting pipe are equipped with hydraulic butterfly valve between intermediate pressure cylinder and low pressure (LP) cylinder, and low pressure (LP) cylinder steam drain is equipped with condenser, coagulates
The outlet of vapour device is connected with heat regenerative system, and heat regenerative system is connected to form closed circulation system with boiler；Steam turbine senior middle school low pressure rotor
It is connected with generator amature；Mesolow connecting pipe is also communicated with extraction line, and the extraction line other end is communicated with heat supply network heating
Device, extraction line are equipped with extraction stop valve, extraction check valve, steam extraction speed between intermediate pressure cylinder steam drain and heat exchangers for district heating and close
Regulating valve and extraction flow measuring device, heat exchangers for district heating are also associated with water level sensor, and heat exchangers for district heating drain water piping is another
End is connected with closed circulation system；Steam Turbine's Main Vaper Valve, septum valve and reheat control valve all trip with steam turbine and connect；
The generator tripping interlocking steam turbine tripping of generator；Electricity hypervelocity OPC share 4 solenoid valves, wherein 2 with septum valve phase
Even, 2 are connected with reheat control valve；The steam inlet pipe road of intermediate pressure cylinder is additionally provided with reheated steam pressure sensor, low pressure (LP) cylinder is additionally provided with
The thermal resistance of the thermal resistance and low pressure (LP) cylinder cylinder body electricity end temperature of low pressure (LP) cylinder cylinder body tune end temperature, generator are additionally provided with power sensing
Device.
2. the safety system of fired power generating unit excision low pressure (LP) cylinder operation according to claim 1, it is characterised in that：Will in
The hydraulic butterfly valve that cannot be closed completely between cylinder pressure and low pressure (LP) cylinder transform the hydraulic butterfly valve that can be closed completely as, in intermediate pressure cylinder
Also be communicated with low pressure (LP) cylinder cooling steam system between low pressure (LP) cylinder, low pressure (LP) cylinder cooling steam system include cooling steam regulating valve and
Cooling steam flow measuring device, intermediate pressure cylinder is equipped with the first intermediate pressure cylinder exhaust steam pressure sensor, the second intermediate pressure cylinder exhaust steam pressure passes
Sensor and intermediate pressure cylinder exhaust temperature thermocouple, low pressure (LP) cylinder are equipped with low pressure (LP) cylinder initial steam pressure sensor, low pressure (LP) cylinder throttle (steam) temperature thermoelectricity
Occasionally, the tune end thermal resistance after the first low pressure (LP) cylinder exhaust stage blade, the tune end thermal resistance after the second low pressure (LP) cylinder exhaust stage blade, the first low pressure
The electric end thermal resistance after electric end thermal resistance and the second low pressure (LP) cylinder exhaust stage blade after cylinder exhaust stage blade；Low pressure (LP) cylinder is also communicated with low pressure
Cylinder spray desuperheating system, low pressure cylinder spray temperature reducing system include cooling water inlet, low pressure cylinder spray regulating valve and low pressure cylinder spray
The sensor of flow.
3. the safety system of fired power generating unit excision low pressure (LP) cylinder operation according to claim 2, it is characterised in that：Distribution
Formula control system DCS is closed by cable and hydraulic butterfly valve, cooling steam regulating valve, extraction stop valve, extraction check valve, steam extraction speed
Regulating valve, Steam Turbine's Main Vaper Valve, septum valve, reheat control valve, low pressure cylinder spray regulating valve, reheated steam pressure sensing
Device, the first intermediate pressure cylinder exhaust steam pressure sensor, the second intermediate pressure cylinder exhaust steam pressure sensor, low pressure (LP) cylinder initial steam pressure sensor, in
Tune end thermal resistance after cylinder pressure exhaust temperature thermocouple, low pressure (LP) cylinder throttle (steam) temperature thermocouple, the first low pressure (LP) cylinder exhaust stage blade, second
The electric end thermal resistance after tune end thermal resistance, the first low pressure (LP) cylinder exhaust stage blade after low pressure (LP) cylinder exhaust stage blade, the second low pressure (LP) cylinder final stage
The thermal resistance of electric end thermal resistance, low pressure (LP) cylinder cylinder body tune end temperature after blade, thermal resistance, the flow of low pressure (LP) cylinder cylinder body electricity end temperature
Metering device, cooling steam flow measuring device, extraction flow measuring device, the sensor of low pressure cylinder spray flow, generator
Power sensor, electricity hypervelocity OPC, steam turbine tripping, generator tripping are connected with water level sensor.
4. a kind of fired power generating unit excision low pressure (LP) cylinder operation as claimed in claim 3, i.e. stop valve and reheat control valve is opened, high
Regulating valve is pressed to open appropriate location according to generator power demand, the difference with original system is that hydraulic butterfly valve completely closes, cooling
Steam control valve is opened, and steam extraction speed closes regulating valve according to heat demand unlatching appropriate location, and low pressure cylinder spray regulating valve is opened；Its
The method for security protection of safety system, it is characterised in that：This method includes the interlocked operation of one or more guard methods
Process, guard method include：Halt turbines protection, steam turbine tripping interlock protection, OPC actions interlock protection, generator are jumped
Lock interlock protection, intermediate pressure cylinder exhaust steam pressure height are protected, main steam flow minimum living shield, extraction line valve accidentally close interlock protection,
Steam extraction speed closes the small protection of control valve position, hydraulic butterfly valve allows closing protection, extraction stop valve that closing protection, steam extraction speed is allowed to close
Regulating valve allows closing protection, protection is opened in the cooling steam regulating valve interlocking of low pressure (LP) cylinder, the cooling steam regulating valve of low pressure (LP) cylinder
Interlocking close protection, protection is opened in the interlocking of low pressure cylinder spray regulating valve, low pressure cylinder spray regulating valve cuts manual protection and DCS automatically
Send out sound-light alarm prompt protection.
5. the method for security protection of the safety system of fired power generating unit excision low pressure (LP) cylinder operation according to claim 4,
It is characterized in that：
Halt turbines are protected：When intermediate pressure cylinder the first intermediate pressure cylinder exhaust steam pressure sensor and the second intermediate pressure cylinder exhaust steam pressure sensor
Exhaust steam pressure signal 2 takes 2 and exhaust steam pressure >=1.1MPa, signal to reach dcs DCS, dcs
DCS, which sends out instruction, makes Steam Turbine's Main Vaper Valve, septum valve and reheat control valve close；Extraction stop valve, extraction check valve and
Steam extraction speed closes regulating valve closing；Hydraulic butterfly valve and cooling steam regulating valve are opened；Steam turbine, which is closed into vapour, makes steam turbine stop fortune
Row；
When steam turbine trip operation or electricity hypervelocity OPC actions or generator tripping act, hydraulic butterfly valve is opened in interlocking；
Intermediate pressure cylinder exhaust steam pressure height is protected：Intermediate pressure cylinder the first intermediate pressure cylinder exhaust steam pressure sensor and the second intermediate pressure cylinder exhaust steam pressure pass
Sensor exhaust steam pressure signal is to dcs DCS, when the first intermediate pressure cylinder exhaust steam pressure sensor and the second intermediate pressure cylinder are arranged
Vapour pressure force snesor exhaust steam pressure signal 2 takes 2 and exhaust steam pressure >=0.85MPa, dcs DCS instruction interlockings to open
Open hydraulic butterfly valve；
Main steam flow minimum living is protected：When main steam flow≤380t/h, signal to dcs DCS, DCS instruction interlockings
It opens hydraulic butterfly valve, interlocking close extraction stop valve, extraction check valve and steam extraction speed and closes regulating valve；
Extraction line valve accidentally closes interlock protection：Regulating valve, which is closed, when extraction stop valve or extraction check valve or steam extraction speed closes letter
Number to dcs DCS, hydraulic butterfly valve is opened in dcs DCS instruction interlockings；
Hydraulic butterfly valve, which allows to close, to be protected：It has opened to have opened with extraction check valve in extraction stop valve and has closed control valve position with steam extraction speed
>=30% and intermediate pressure cylinder turbine pressure ratio between 3.9 and 4.2 when, dcs DCS instruction hydraulic butterfly valve allows to close extremely
Valve position ＜ 15%；
Steam extraction speed closes the small protection of control valve position：When hydraulic butterfly valve valve position ＜ 3% and steam extraction speed close control valve position ＜ 30%, point
Hydraulic butterfly valve is opened in the DCS instruction interlockings of cloth control system；
Extraction stop valve, which allows to close, to be protected：It is distributed as main steam flow ＞ 380t/h and hydraulic butterfly valve valve position ＞ 50%
Control system DCS instructions allow that extraction stop valve is turned off manually；
Extraction check valve, which allows to close, to be protected：It is distributed as main steam flow ＞ 380t/h and hydraulic butterfly valve valve position ＞ 50%
Control system DCS instructions allow that extraction check valve is turned off manually；
Steam extraction speed, which closes regulating valve, to be allowed to close protection：As main steam flow ＞ 380t/h and hydraulic butterfly valve valve position ＞ 15%, point
The DCS instructions of cloth control system allow to be turned off manually steam extraction speed pass regulating valve to 30% or less；
Protection is opened in the cooling steam regulating valve interlocking of low pressure (LP) cylinder：When hydraulic butterfly valve valve position≤15%, the cold of low pressure (LP) cylinder is opened in interlocking
But steam control valve, cooling steam flow are adjusted to 20t/h；
The cooling steam regulating valve interlocking close of low pressure (LP) cylinder is protected：As hydraulic butterfly valve valve position ＞ 15%, interlocking close low pressure (LP) cylinder it is cold
But steam control valve；
Protection is opened in the interlocking of low pressure cylinder spray regulating valve：When low pressure (LP) cylinder electricity end and adjust six, end any temperature >=80 of exhaust temperature
DEG C, low pressure cylinder spray regulating valve is opened in dcs DCS instruction interlockings, and spray flow is adjusted to 20t/h；
Low pressure cylinder spray regulating valve cuts manual protection automatically：When the instruction of low pressure cylinder spray regulating valve is more than ± 20% with feedback deviation
Or the damage of low pressure cylinder spray regulating valve feedback or low pressure (LP) cylinder electricity end and when end exhaust temperature signal 6 being adjusted to take 3 damage, distribution control
System DCS instructions processed allow low pressure cylinder spray regulating valve to cut automatically manually.
6. the method for security protection of the safety system of fired power generating unit excision low pressure (LP) cylinder operation according to claim 4,
It is characterized in that：The alarm and protection of the dcs DCS：
（1）Temperature after low pressure (LP) cylinder exhaust stage blade or any temperature of low pressure (LP) cylinder center housing temperature>120 DEG C, dcs DCS
Send out sound-light alarm prompt protection；
（2）When mesolow connecting pipe hydraulic butterfly valve failure, dcs DCS sends out sound-light alarm prompt protection；
（3）Intermediate pressure cylinder turbine pressure ratio >=4.2, dcs DCS send out sound-light alarm prompt protection；
（4）Intermediate pressure cylinder turbine pressure ratio≤3.9, dcs DCS send out sound-light alarm prompt protection；
（5）Intermediate pressure cylinder exhaust temperature >=380 DEG C, dcs DCS send out sound-light alarm prompt protection；
（6）Intermediate pressure cylinder exhaust steam pressure >=0.85MPa, dcs DCS send out sound-light alarm prompt protection；
（7）Heat exchangers for district heating liquid level L >=300mm, dcs DCS send out sound-light alarm prompt protection；
（8）Low pressure cylinder spray regulating valve is cut manually automatically, and dcs DCS sends out sound-light alarm prompt protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810181135.0A CN108561196B (en) | 2018-03-06 | 2018-03-06 | Safety protection system and method for cutting off operation of low-pressure cylinder of thermal power generating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810181135.0A CN108561196B (en) | 2018-03-06 | 2018-03-06 | Safety protection system and method for cutting off operation of low-pressure cylinder of thermal power generating unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108561196A true CN108561196A (en) | 2018-09-21 |
| CN108561196B CN108561196B (en) | 2024-02-20 |
Family
ID=63532432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810181135.0A Active CN108561196B (en) | 2018-03-06 | 2018-03-06 | Safety protection system and method for cutting off operation of low-pressure cylinder of thermal power generating unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108561196B (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404063A (en) * | 2018-10-22 | 2019-03-01 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | A kind of back pressure type heat supply steam turbine energy conservation regulating system |
| CN109681277A (en) * | 2019-01-21 | 2019-04-26 | 西安热工研究院有限公司 | A kind of low pressure (LP) cylinder exhaust stage blade blast temperature control system and control method |
| CN109782584A (en) * | 2019-01-21 | 2019-05-21 | 杭州澎康自动化科技有限公司 | A kind of pumping back type steam turbine self-adjusting control |
| CN109827218A (en) * | 2018-12-17 | 2019-05-31 | 上海电力学院 | A kind of the extraction for heat supply system and control method of thorough excision separate unit low pressure (LP) cylinder |
| CN109869199A (en) * | 2019-01-31 | 2019-06-11 | 山西河坡发电有限责任公司 | A kind of steam turbine structure and low pressure (LP) cylinder cut cylinder control method |
| CN109944646A (en) * | 2019-04-04 | 2019-06-28 | 哈尔滨汽轮机厂有限责任公司 | The bypassing method of blade risk in the transformation of thermal power steam turbine group low pressure (LP) cylinder zero energy |
| CN110219707A (en) * | 2019-06-27 | 2019-09-10 | 东方电气集团东方汽轮机有限公司 | A kind of control and guard method that double low pressure (LP) cylinder turbine low pressure cylinders zero are contributed |
| CN110259527A (en) * | 2019-07-24 | 2019-09-20 | 哈尔滨汽轮机厂有限责任公司 | A kind of power output of super-pressure 200MW low pressure (LP) cylinder zero flexibility transformation steam turbine |
| CN110307043A (en) * | 2019-06-27 | 2019-10-08 | 东方电气集团东方汽轮机有限公司 | Two low pressure (LP) cylinders of double low pressure (LP) cylinder steam turbines simultaneously or separately zero power output reconstruction structure |
| CN110553300A (en) * | 2019-09-25 | 2019-12-10 | 北京国电蓝天节能科技开发有限公司 | heating system and method for wet cooling unit |
| CN110553301A (en) * | 2019-09-25 | 2019-12-10 | 北京国电蓝天节能科技开发有限公司 | heat supply method and system for air cooling unit |
| CN111120021A (en) * | 2019-12-20 | 2020-05-08 | 东方电气集团东方汽轮机有限公司 | Water charging system for condenser of heat supply unit |
| CN111255529A (en) * | 2020-03-19 | 2020-06-09 | 西安热工研究院有限公司 | Quick response automatic power generation control system and method for operation of heat supply cylinder switching unit |
| CN112160802A (en) * | 2020-09-24 | 2021-01-01 | 华北电力大学（保定） | Control method of bypass steam inlet regulating valve in low-pressure cylinder zero-output operation mode |
| CN112377279A (en) * | 2020-09-30 | 2021-02-19 | 广西电网有限责任公司电力科学研究院 | Cogeneration unit monitoring system suitable for butterfly valve to control steam extraction pressure |
| CN112554973A (en) * | 2020-11-19 | 2021-03-26 | 岭东核电有限公司 | Logical control method for steam extraction check valve of GSS (gas insulated switchgear) system of nuclear power station |
| CN113586189A (en) * | 2021-09-07 | 2021-11-02 | 华能伊敏煤电有限责任公司 | Cylinder cutting heat supply system and heat supply method after through-flow modification of 500MW thermal power generating unit |
| CN113606002A (en) * | 2021-08-02 | 2021-11-05 | 华能鹤岗发电有限公司 | Low-pressure cylinder zero-output heat supply system and method |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11132007A (en) * | 1997-10-24 | 1999-05-18 | Toshiba Corp | Turbine overspeed prevention device |
| JP2000154704A (en) * | 1998-11-17 | 2000-06-06 | Toshiba Corp | Combined cycle power generation plant |
| CN103412526A (en) * | 2013-07-12 | 2013-11-27 | 国家电网公司 | Scheduling method of heat supply unit online load and system |
| CN105673101A (en) * | 2016-01-07 | 2016-06-15 | 山西漳泽电力股份有限公司电力技术研究中心 | Turbine with deep peak regulation function and thermodynamic system |
| CN205445699U (en) * | 2016-01-07 | 2016-08-10 | 山西漳泽电力股份有限公司电力技术研究中心 | Steam turbine with degree of depth peak regulation function |
| CN106021950A (en) * | 2016-06-02 | 2016-10-12 | 国网辽宁省电力有限公司 | Method for ordering power by heat of heat supply unit based on turbine energy balance |
| CN206267900U (en) * | 2016-11-22 | 2017-06-20 | 华电能源股份有限公司富拉尔基发电厂 | A kind of steam turbine low-pressure optical axis heat supply steam bleeding system |
| CN106979041A (en) * | 2017-04-01 | 2017-07-25 | 祝凤娟 | A kind of turbine low pressure cylinder high vacuum takes off the remodeling method that cylinder runs thermoelectricity decoupled system |
| CN107165687A (en) * | 2017-06-30 | 2017-09-15 | 国电科学技术研究院 | A kind of flexibility cuts off the extraction for heat supply system and control method of low pressure (LP) cylinder |
| CN207989082U (en) * | 2018-03-06 | 2018-10-19 | 辽宁东方发电有限公司 | Fired power generating unit cuts off the safety system of low pressure (LP) cylinder operation |
| CN111520197A (en) * | 2020-04-09 | 2020-08-11 | 上海发电设备成套设计研究院有限责任公司 | Steam turbine zero-output-based combined heat and power generation unit deep peak shaving system and method |
-
2018
- 2018-03-06 CN CN201810181135.0A patent/CN108561196B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11132007A (en) * | 1997-10-24 | 1999-05-18 | Toshiba Corp | Turbine overspeed prevention device |
| JP2000154704A (en) * | 1998-11-17 | 2000-06-06 | Toshiba Corp | Combined cycle power generation plant |
| CN103412526A (en) * | 2013-07-12 | 2013-11-27 | 国家电网公司 | Scheduling method of heat supply unit online load and system |
| CN105673101A (en) * | 2016-01-07 | 2016-06-15 | 山西漳泽电力股份有限公司电力技术研究中心 | Turbine with deep peak regulation function and thermodynamic system |
| CN205445699U (en) * | 2016-01-07 | 2016-08-10 | 山西漳泽电力股份有限公司电力技术研究中心 | Steam turbine with degree of depth peak regulation function |
| CN106021950A (en) * | 2016-06-02 | 2016-10-12 | 国网辽宁省电力有限公司 | Method for ordering power by heat of heat supply unit based on turbine energy balance |
| CN206267900U (en) * | 2016-11-22 | 2017-06-20 | 华电能源股份有限公司富拉尔基发电厂 | A kind of steam turbine low-pressure optical axis heat supply steam bleeding system |
| CN106979041A (en) * | 2017-04-01 | 2017-07-25 | 祝凤娟 | A kind of turbine low pressure cylinder high vacuum takes off the remodeling method that cylinder runs thermoelectricity decoupled system |
| CN107165687A (en) * | 2017-06-30 | 2017-09-15 | 国电科学技术研究院 | A kind of flexibility cuts off the extraction for heat supply system and control method of low pressure (LP) cylinder |
| CN207989082U (en) * | 2018-03-06 | 2018-10-19 | 辽宁东方发电有限公司 | Fired power generating unit cuts off the safety system of low pressure (LP) cylinder operation |
| CN111520197A (en) * | 2020-04-09 | 2020-08-11 | 上海发电设备成套设计研究院有限责任公司 | Steam turbine zero-output-based combined heat and power generation unit deep peak shaving system and method |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404063A (en) * | 2018-10-22 | 2019-03-01 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | A kind of back pressure type heat supply steam turbine energy conservation regulating system |
| CN109404063B (en) * | 2018-10-22 | 2024-06-07 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Energy-saving regulating system of back pressure type heat supply steam turbine |
| CN109827218A (en) * | 2018-12-17 | 2019-05-31 | 上海电力学院 | A kind of the extraction for heat supply system and control method of thorough excision separate unit low pressure (LP) cylinder |
| CN109681277A (en) * | 2019-01-21 | 2019-04-26 | 西安热工研究院有限公司 | A kind of low pressure (LP) cylinder exhaust stage blade blast temperature control system and control method |
| CN109782584A (en) * | 2019-01-21 | 2019-05-21 | 杭州澎康自动化科技有限公司 | A kind of pumping back type steam turbine self-adjusting control |
| CN109869199A (en) * | 2019-01-31 | 2019-06-11 | 山西河坡发电有限责任公司 | A kind of steam turbine structure and low pressure (LP) cylinder cut cylinder control method |
| CN109944646A (en) * | 2019-04-04 | 2019-06-28 | 哈尔滨汽轮机厂有限责任公司 | The bypassing method of blade risk in the transformation of thermal power steam turbine group low pressure (LP) cylinder zero energy |
| CN110219707A (en) * | 2019-06-27 | 2019-09-10 | 东方电气集团东方汽轮机有限公司 | A kind of control and guard method that double low pressure (LP) cylinder turbine low pressure cylinders zero are contributed |
| CN110307043A (en) * | 2019-06-27 | 2019-10-08 | 东方电气集团东方汽轮机有限公司 | Two low pressure (LP) cylinders of double low pressure (LP) cylinder steam turbines simultaneously or separately zero power output reconstruction structure |
| CN110219707B (en) * | 2019-06-27 | 2021-12-21 | 东方电气集团东方汽轮机有限公司 | Control and protection method for zero output of low pressure cylinder of double-low pressure cylinder steam turbine |
| CN110259527A (en) * | 2019-07-24 | 2019-09-20 | 哈尔滨汽轮机厂有限责任公司 | A kind of power output of super-pressure 200MW low pressure (LP) cylinder zero flexibility transformation steam turbine |
| CN110553300A (en) * | 2019-09-25 | 2019-12-10 | 北京国电蓝天节能科技开发有限公司 | heating system and method for wet cooling unit |
| CN110553301A (en) * | 2019-09-25 | 2019-12-10 | 北京国电蓝天节能科技开发有限公司 | heat supply method and system for air cooling unit |
| CN110553301B (en) * | 2019-09-25 | 2021-09-28 | 国电龙源节能技术有限公司 | Heat supply method and system for air cooling unit |
| CN110553300B (en) * | 2019-09-25 | 2021-05-28 | 国电龙源节能技术有限公司 | Heating system and method for wet cooling unit |
| CN111120021A (en) * | 2019-12-20 | 2020-05-08 | 东方电气集团东方汽轮机有限公司 | Water charging system for condenser of heat supply unit |
| CN111120021B (en) * | 2019-12-20 | 2022-06-24 | 东方电气集团东方汽轮机有限公司 | Water charging system for condenser of heat supply unit |
| CN111255529A (en) * | 2020-03-19 | 2020-06-09 | 西安热工研究院有限公司 | Quick response automatic power generation control system and method for operation of heat supply cylinder switching unit |
| CN111255529B (en) * | 2020-03-19 | 2024-02-02 | 西安热工研究院有限公司 | Rapid response automatic power generation control system and method during operation of heat supply cylinder cutting unit |
| CN112160802A (en) * | 2020-09-24 | 2021-01-01 | 华北电力大学（保定） | Control method of bypass steam inlet regulating valve in low-pressure cylinder zero-output operation mode |
| CN112377279A (en) * | 2020-09-30 | 2021-02-19 | 广西电网有限责任公司电力科学研究院 | Cogeneration unit monitoring system suitable for butterfly valve to control steam extraction pressure |
| CN112554973A (en) * | 2020-11-19 | 2021-03-26 | 岭东核电有限公司 | Logical control method for steam extraction check valve of GSS (gas insulated switchgear) system of nuclear power station |
| CN113606002A (en) * | 2021-08-02 | 2021-11-05 | 华能鹤岗发电有限公司 | Low-pressure cylinder zero-output heat supply system and method |
| CN113586189A (en) * | 2021-09-07 | 2021-11-02 | 华能伊敏煤电有限责任公司 | Cylinder cutting heat supply system and heat supply method after through-flow modification of 500MW thermal power generating unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108561196B (en) | 2024-02-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108561196A (en) | Fired power generating unit cuts off the safety protection system and method for low pressure (LP) cylinder operation | |
| CN207989082U (en) | Fired power generating unit cuts off the safety system of low pressure (LP) cylinder operation | |
| CN110219707B (en) | Control and protection method for zero output of low pressure cylinder of double-low pressure cylinder steam turbine | |
| CN103382860B (en) | Steam turbine power generation heating system controlling method | |
| CN108035777B (en) | Low-pressure cylinder combined zero-output heat supply system and method in thermal power generating unit | |
| US8210801B2 (en) | Systems and methods of reducing heat loss from a gas turbine during shutdown | |
| JP5860597B2 (en) | System and method for preheating exhaust heat recovery boiler piping | |
| JP2000161014A5 (en) | ||
| JP2000161014A (en) | Combined power generator facility | |
| CN111255536B (en) | FCB operation method of gas-steam unit power plant | |
| CN108757068B (en) | Combined cycle steam turbine set total cut heat supply control method and device | |
| JP2010281321A (en) | Clutched steam turbine low-pressure section and method therefor | |
| JPH09112215A (en) | Gas turbine power plant and method of operating thereof | |
| CN108104888A (en) | A kind of power grid frequency modulation system and method based on frequency modulation bypass | |
| CN106322346B (en) | A kind of method of direct current cooker sliding parameter blowing out | |
| CN206190339U (en) | Two branch road heating system of cogeneration steam turbine | |
| JP5524923B2 (en) | Low pressure turbine bypass control device and power plant | |
| KR102310444B1 (en) | Combined heat and power system operable in case of load loss of turbine generator | |
| CN206386913U (en) | A kind of nuclear power station low-pressure heater | |
| CN208073572U (en) | A kind of power grid frequency modulation system based on frequency modulation bypass | |
| Zheng et al. | Application study on zero output technology of low pressure cylinder of 350MW supercritical unit | |
| CN113251412A (en) | Flexible peak shaving system and method for supercritical boiler | |
| CN215333020U (en) | Steam inlet system of double-pressure steam turbine for natural gas waste heat power generation | |
| JP2823342B2 (en) | Steam temperature controller for superheater / reheater in combined cycle power plant | |
| Smith | Supercritical CO2 Controls Strategies for a Fixed-Speed Recompression Closed Brayton Cycle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20181210 Address after: 113000 No. 1 Funing North 1 Road, Zhangdang Street, Dongzhou District, Fushun City, Liaoning Province Applicant after: LIAONING DONGFANG POWER GENERATION Co.,Ltd. Applicant after: China Power Investment Northeast Energy Technology Co.,Ltd. Address before: 113007 No. 1, North Funing Road, Zhangdang Street, Dongzhou District, Fushun City, Liaoning Province Applicant before: LIAONING DONGFANG POWER GENERATION Co.,Ltd. Applicant before: LIAONING CPI POWER STATION COMBUSTION ENGINEERING RESEARCH CENTER Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |