CN110067609A - A kind of Thermal generation unit transform the method and phase modifier of phase modifier as - Google Patents
A kind of Thermal generation unit transform the method and phase modifier of phase modifier as Download PDFInfo
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- CN110067609A CN110067609A CN201910266073.8A CN201910266073A CN110067609A CN 110067609 A CN110067609 A CN 110067609A CN 201910266073 A CN201910266073 A CN 201910266073A CN 110067609 A CN110067609 A CN 110067609A
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- high pressure
- pressure cylinder
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- generation unit
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- 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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
- F01K7/345—Control or safety-means particular thereto
-
- 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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
- F01K7/44—Use of steam for feed-water heating and another purpose
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
- F22D1/34—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines and returning condensate to boiler with main feed supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1885—Arrangements for adjusting, eliminating or compensating reactive power in networks using rotating means, e.g. synchronous generators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The present invention proposes a kind of method that Thermal generation unit transform phase modifier as, comprising the following steps: S1, by high pressure cylinder rotor and generator amature flexible connection；S2, obstruct steam turbine intermediate pressure cylinder and low pressure (LP) cylinder into steam drain, the high temperature and high pressure steam of boiler be directly entered high pressure cylinder acting；S3, using the steam discharge of high pressure cylinder as temperature end, a part connection enters oxygen-eliminating device, and another part is connection directly into condenser；The throttle flow of come into operation quantity and the high-pressure heater of high-pressure heater is adjusted according to operating load；S4, excitation system control parameter is adjusted, so that generator overexcited operation is exported lagging reactive power or underexcited operation to power grid and exports capacitive reactive power to power grid.Improved phase modifier has the system function for participating in power grid phase modulation process, and power grid dynamic reactive enabling capabilities weaken during solving the problems, such as domestic power grid long distance delivery.The effective recycling for realizing vacant Thermal generation unit simultaneously, promotes the optimization and upgrading of traditional fired power generating unit.
Description
Technical field
The present invention relates to coal-fired power generator set field, in particular to method that a kind of Thermal generation unit transform phase modifier as
And phase modifier.
Background technique
With putting into operation successively for extra-high voltage direct-current transmission engineering, when China's power grid gradually steps into alternating current-direct current mixing power transmission network
Generation.However, " directly the handing over by force weak " of hinge converter station regional power grid is particularly thorny, the weaker problem of reactive power support ability is power grid peace
The major hidden danger of full reliability service.In order to improve the reactive power support ability and stable operation ability of alternating current-direct current mixing power transmission network,
Power grid alternating current-direct current junction deployment construction large capacity synchronous capacitor group, which has become, improves the effective of electric network reactive-load support demand
Approach.
Phase modifier belongs to synchronous motor, synchronous when grid voltage sags other than having stronger short-time overload capacity
Motor characteristic can increase idle output moment.Along with mating excitation system is automatic, quickly encourages by force, synchronous capacitor, which has, to be held
The clear superiorities such as amount is big, overload capacity is strong, transient performance is excellent, controllability is good, especially meet extra-high voltage direct-current station it is wide in range, it is huge,
Quick reactive power support demand.But the investment of phase modifier is also faced with the problems such as operation and maintenance amount is big, investment is high.
The energy strategy policy for implementing " saving, cleaning, safety " comprehensively for response country, promotes coal fired power generation optimization to change
Make, strive for coal consumption for power generation, pollutant emission, coal consumption account for energy-consuming specific gravity " three reduce " and be safely operated quality,
Technical equipment, electric coal account under the historical background of consumption of coal specific gravity " three improve ", and Thermal generation unit is faced with severe
Upgrading pressure, directly scrapping replacement will cause a large amount of assets waste, and cost is excessively high.
Summary of the invention
To solve the above problems, the present invention proposes a kind of method that Thermal generation unit transform phase modifier as, fire coal is sent out
Motor group transform phase modifier as, so that it is had the class phase modulating system function of participating in power grid phase modulation process, it is long to solve domestic power grid
The problem of power grid dynamic reactive enabling capabilities caused by large capacity alternating current-direct current paired running in transmission process weaken.Meanwhile
Thermal generation unit transform phase modifier as, realizes effective recycling of existing vacant Thermal generation unit, promotes tradition
The optimization and upgrading of fired power generating unit.
Technical solution: the present invention proposes a kind of method that Thermal generation unit transform phase modifier as, the coal fired power generation machine
Group includes boiler, steam turbine, electricity generation system, steam-water circulation system；The steam turbine includes low pressure (LP) cylinder, intermediate pressure cylinder and high pressure cylinder；
The electricity generation system includes generator and excitation system；The steam-water circulation system include heat regenerative system, condensate system and
Water supply system, the heat regenerative system include oxygen-eliminating device and multistage pressure heater, and the condensate system includes condenser.It will combustion
Coal power generation Transformation of Unit be phase modifier method the following steps are included:
S1, by high pressure cylinder rotor and generator amature flexible connection；
S2, obstruct steam turbine intermediate pressure cylinder and low pressure (LP) cylinder into steam drain, the high temperature and high pressure steam of boiler is directly entered high pressure cylinder
Acting；
S3, using the steam discharge of high pressure cylinder as temperature end, a part connection enters oxygen-eliminating device, and another part is connection directly into condensing
Device；The throttle flow of come into operation quantity and the high-pressure heater of high-pressure heater is adjusted according to operating load；
S4, adjust excitation system control parameter, make the generator overexcited operation and to power grid export lagging reactive power or
Underexcited operation and to power grid export capacitive reactive power.
Further, the step S1 further includes that a thrust shaft is arranged in one end of high pressure cylinder rotor connection generator amature
It holds.
Further, come into operation level-one high-pressure heater in the step S3, close other high-pressure heaters into steam discharge.
Further, the extraction line of the high pressure cylinder and blow-off line arrange non-return valve.
Further, in the step S4, excitation system carries out PID adjusting to the size of exciting current or excitation voltage, makes
The generator overexcited operation and export lagging reactive power or underexcited operation to power grid and export capacitive reactive power to power grid
Power.
A kind of phase modifier based on Thermal generation unit transformation, including boiler, steam turbine, electricity generation system, steam/water circulating system
System；The steam turbine includes high pressure cylinder；The electricity generation system includes generator and excitation system；The steam-water circulation system includes
Heat regenerative system, condensate system and water supply system, the heat regenerative system include oxygen-eliminating device and high-pressure heater, the condensed water
System includes condenser；
The high temperature and high pressure steam of the boiler is directly entered high pressure cylinder acting；
A part of steam discharge of the high pressure cylinder enters oxygen-eliminating device as temperature end connection；
Another part steam discharge of the high pressure cylinder is connection directly into condenser and is condensed into liquid water；The outlet of the condenser
Liquid water enters after oxygen-eliminating device deoxygenation the water supply for being incorporated to boiler as cold end connection；
The water supply of the boiler enters high-pressure heater as low-temperature end connection；The steam extraction of the high pressure cylinder as temperature end successively
It is connected in series and enters high-pressure heater and oxygen-eliminating device；
The high pressure cylinder rotor and generator amature flexible connection；The excitation system control parameter makes the generator overexcitation
It runs and exports lagging reactive power or underexcited operation to power grid and export capacitive reactive power to power grid.
Further, a thrust bearing is arranged in one end of the high pressure cylinder rotor connection generator amature.
Further, the high temperature end entrance of the high-pressure heater is connected with the level-one extraction line of high pressure cylinder.
Further, the level-one extraction line of the high pressure cylinder and blow-off line arrange non-return valve.
Further, the excitation system carries out PID adjusting to the size of exciting current or excitation voltage, makes the generator
Overexcited operation and export lagging reactive power or underexcited operation to power grid and export capacitive reactive power to power grid.
The utility model has the advantages that (1) present invention by the Optimizing Reconstruction to Thermal generation unit, has it and participates in power grid phase modulation mistake
The class phase modulating system function of journey, large capacity alternating current-direct current paired running draws electricity during solving domestic power grid long distance delivery
The problem of net dynamic reactive enabling capabilities weaken.
(2) phase modifier of the invention based on Thermal generation unit transformation carries out nothing by the exciting current of adjustment generator
Function compensation, quickly can provide the electrodeless capacitive or inductive reactive power continuously adjusted to power grid, can be used for improving power factor, reduce net
Network loss adjusts regional voltage, improves Voltage Stability Level.Compared to the common statics reactive power compensator such as capacitor, dynamic
Reactive-load compensation equipment is not constrained by voltage, and the speed of response is fast, can further improve Enhancement of Transient Voltage Stability.Therefore, institute of the present invention
Disclosed phase modifier can quickly provide reactive power support in ac and dc systems failure, accelerate voltage regeneration rate and reduce commutation
The risk of failure.
(3) it transform Thermal generation unit as phase modifier, realizes effective recycling of vacant Thermal generation unit, promote
The optimization and upgrading of traditional thermoelectricity.
(4) transformation difficulty of the present invention is small, and improvement cost is lower, is widely used.
Detailed description of the invention
Fig. 1 is the heat flow diagrams of the phase modifier of the invention based on Thermal generation unit transformation；
Fig. 2 is the Excitation Control Strategy figure of the phase modifier of the invention based on Thermal generation unit transformation；
Fig. 3 is the steam turbine DEH control strategy figure of the phase modifier of the invention based on Thermal generation unit transformation.
Specific embodiment
The present invention proposes a kind of method that Thermal generation unit transform phase modifier as, and the Thermal generation unit includes pot
Furnace, steam turbine, electricity generation system, steam-water circulation system；The steam turbine includes low pressure (LP) cylinder, intermediate pressure cylinder and high pressure cylinder；The power generation
System includes generator and excitation system；The steam-water circulation system includes heat regenerative system, condensate system and water supply system,
The heat regenerative system includes oxygen-eliminating device and multistage pressure heater, and the condensate system includes condenser.
Heat regenerative system refers to that a part of steam drawn by steam turbine is used to heat the water supply for having discharged latent heat, improves whole
The operational efficiency of a steam/water circulating process.Heat regenerative system includes oxygen-eliminating device and multistage pressure heater, more by high-pressure heater
Grade arranges to reduce the heat exchange difference of steam and water supply.
Condensate system includes condenser, condenser vacuumizes and the control of main condensate valve.In Thermal generation unit
In, the steam discharge of high pressure cylinder be connected to intermediate pressure cylinder into vapour, the steam discharge of intermediate pressure cylinder be connected to low pressure (LP) cylinder into vapour, then low pressure (LP) cylinder is arranged
Vapour enters condenser；The effect of condenser is condensed to the steam discharge from low pressure (LP) cylinder, and the latent heat of steam discharge is discharged.Condenser is taken out
Vacuum includes that steam chest is vacuumized and vacuumized with water chamber, and the process that steam chest vacuumizes arranges the incondensable gas in condenser steam chest
Out, guarantee the water quality of steam/water circulating process, water chamber vacuumizes when being for unit starting, establishes the siphon effect of condenser water box
Fruit guarantees the stable operation of circulation；Main condensate valve controls main condensate flow, to maintain the steady of deaerator level
It is fixed；The water level of thermal well of condenser is controlled by water compensating valve and overflow valve, sets hot water water level moisturizing liquid level and overflow valve opens liquid
Position.
Water supply system includes main feed pump and water-supply valve, and major function will pass through thermal de-aeration from oxygen-eliminating device
Main water supply pressurization is sent to high-pressure heater, economizer and subsequent heat system.
By above-mentioned Thermal generation unit transform as phase modifier method the following steps are included:
S1, by high pressure cylinder rotor and generator amature flexible connection；It is arranged in one end of high pressure cylinder rotor connection generator amature
One thrust bearing enters the axial thrust that high pressure cylinder expansion acting generates for equilibrium vapor, ensures steam turbine high-pressure cylinder and hair
The safety and reliability of motor operation.
S2, obstruct steam turbine intermediate pressure cylinder and low pressure (LP) cylinder into steam drain, the high temperature and high pressure steam of boiler is directly entered height
Cylinder pressure acting.When Thermal generation unit is used as phase modifier, entire unit is in Ultra-low load operation operating condition, does not generate any active
Power, the shaft work that steam turbine generates are only used for overcoming every loss of generator itself and maintain generator amature with specified turn
Speed operation, if in putting into operation, the problems such as low pressure (LP) cylinder will cause the operational efficiency of steam turbine to decline, turbine blade is lost, because
This isolation intermediate pressure cylinder and low pressure (LP) cylinder into steam drain, it is small that the isometric flow of the air blast occurred under steam turbine ultra-low load can be reduced
Operating condition reduces the loss of entire generating set.
S3, using the steam discharge of high pressure cylinder as temperature end, a part connection enters oxygen-eliminating device, the steam discharge of another part high pressure cylinder
Because in, low pressure (LP) cylinder deactivate, be connection directly into condenser；It is negative according to operation as phase modifier in use, unit load reduces
Lotus adjusts the throttle flow of come into operation quantity and the high-pressure heater of high-pressure heater；The general level-one high-pressure heater that need to only come into operation, is closed
Close other high-pressure heaters into steam discharge.
S4, excitation system carry out PID adjusting to the size of exciting current or excitation voltage, transport the generator overexcitation
It goes and exports lagging reactive power or underexcited operation to power grid and export capacitive reactive power to power grid.
A kind of phase modifier based on Thermal generation unit transformation, including boiler 100, steam turbine, electricity generation system, steam/water circulating
System；The steam turbine includes high pressure cylinder 210；The electricity generation system includes generator 810 and excitation system；The steam/water circulating
System includes the water supply system of heat regenerative system, condensate system and boiler, and the heat regenerative system includes oxygen-eliminating device 320 and high pressure
Heater 310, the condensate system include condenser 510.
The high temperature and high pressure steam of the boiler 100 is directly entered height through high pressure cylinder main inlet throttle-stop valve 710 and high pressure cylinder homophony door 610
Cylinder pressure 210 does work.
A part of steam discharge of the high pressure cylinder 210 enters oxygen-eliminating device 320 as temperature end connection.
Another part steam discharge of the high pressure cylinder 210 is connection directly into condenser 510 and is condensed into liquid water；The condensation
The liquid water of the outlet of device 510 enters oxygen-eliminating device 320 through condensate pump 420 and connection condensed water tune valve 620, as cold end connection
410 import of main feed pump of water supply system is incorporated to after deoxygenation.
The boiler feedwater that the main feed pump 410 exports enters high-pressure heater 310 as low-temperature end connection；The high pressure
The level-one steam extraction of cylinder 210 is sequentially connected in series as temperature end into high-pressure heater 310 and oxygen-eliminating device 320.
The level-one extraction line and blow-off line of the high pressure cylinder 210 arrange non-return valve.
210 rotor of high pressure cylinder and 810 rotor flexible connection of generator；The high pressure cylinder rotor connects generator amature
One end be arranged a thrust bearing 910.
The excitation system carries out PID adjusting to the size of exciting current or excitation voltage, makes the generator overexcitation
It runs and exports lagging reactive power or underexcited operation to power grid and export capacitive reactive power to power grid.Excitation system control
It is tactful as shown in Figure 2:
Excitation con-trol voltage of the excitation system based on PID controller control generator, the S input terminal of PID controller are excitation control
Voltage setting value U processedref, the P input of PID controller is generator terminal voltage U；The output end of PID controller connects switching
The N-terminal of switch switches the end the Y connection constant value 0 of switch, and the Flag end signal for switching switch is that excitation system cuts off signal；It cuts
The output end for changing switch is the excitation con-trol voltage U of generator excited system0。
The Steam Turbine control strategy of phase modifier based on Thermal generation unit transformation of the invention is as shown in Figure 3:
The control of Steam Turbine is divided into revolving speed control and two parts of power control, and wherein revolving speed control is based on PID control
Device closed-loop control, comprising: correspondence flow instruction that setting speed value is obtained via revolving speed flow curve function F1, setting speed with
Rotating speed measured value calculates the flow instruction and turbine speed overspeed protection flow instruction of output through PID controller P1.PID control
The proportionality coefficient and integration time constant of device P1 processed is depending on specific unit.
Steam turbine power control mode is divided into opened loop control and closed-loop control.Opened loop control refers to that the output of load setting value is
Flow instruction, without PID controller；Closed-loop control refers to that load setting value and power measurement values are defeated after PID controller is adjusted
Target flow instructs out.
Revolving speed control and the flow instruction of power control obtain total flow instruction by adder, through high-pressure governing valve flow
Characteristic curve function F2 obtains the opening degree instruction of high pressure cylinder homophony door 610.High-pressure governing valve rating curve function F2 view is specific
Depending on unit.
The start-up course of phase modifier based on Thermal generation unit transformation of the invention are as follows:
(1) starting trouble；
(2) confirmation steam turbine ancillary equipment is available；
(3) Protection System of Turbin is resetted；
(4) rotating speed of target is set；
(5) it executes and carries out order, start steam turbine；
(6) turbine speed reaches rated speed, puts into generator excited system；
(7) synchronization device is put into, so that generator machine is incorporated into the power networks, initial load on steam turbine band；
(8) target load is set；
(9) it executes and carries out order, steam turbine lifting load；
(10) after steam turbine reaches assumed load, phase modulation function is realized according to power system reactive power adjustment excitation con-trol voltage.
The stopping process of phase modifier based on Thermal generation unit transformation of the invention are as follows:
(1) back-up disk stopping signal is triggered, steam turbine is interdicted；
(2) jacking oil system is put into, barring gear is started；
(3) boiler is out of service.
Claims (10)
1. a kind of method that Thermal generation unit transform phase modifier as, the Thermal generation unit includes boiler, steam turbine, power generation
System, steam-water circulation system；The steam turbine includes low pressure (LP) cylinder, intermediate pressure cylinder and high pressure cylinder；The electricity generation system includes generator
And excitation system；The steam-water circulation system includes heat regenerative system, condensate system and water supply system, the heat regenerative system packet
Oxygen-eliminating device and multistage pressure heater are included, the condensate system includes condenser, which comprises the following steps:
S1, by high pressure cylinder rotor and generator amature flexible connection；
S2, obstruct steam turbine intermediate pressure cylinder and low pressure (LP) cylinder into steam drain, the high temperature and high pressure steam of boiler is directly entered high pressure cylinder
Acting；
S3, using the steam discharge of high pressure cylinder as temperature end, a part connection enters oxygen-eliminating device, and another part is connection directly into condensing
Device；The throttle flow of come into operation quantity and the high-pressure heater of high-pressure heater is adjusted according to operating load；
S4, adjust excitation system control parameter, make the generator overexcited operation and to power grid export lagging reactive power or
Underexcited operation and to power grid export capacitive reactive power.
2. the method that Thermal generation unit according to claim 1 transform phase modifier as, it is characterised in that: the step S1
It further include that one thrust bearing is set in one end of high pressure cylinder rotor connection generator amature.
3. the method that Thermal generation unit according to claim 2 transform phase modifier as, it is characterised in that: the step S3
In come into operation level-one high-pressure heater, close other high-pressure heaters into steam discharge.
4. the method that Thermal generation unit according to claim 1 transform phase modifier as, it is characterised in that: the high pressure cylinder
Extraction line and blow-off line arrange non-return valve.
5. the method that Thermal generation unit according to claim 1 transform phase modifier as, it is characterised in that: the step S4
In, excitation system carries out PID adjusting to the size of exciting current or excitation voltage, make the generator overexcited operation and to electricity
Net exports lagging reactive power or underexcited operation and exports capacitive reactive power to power grid.
6. a kind of phase modifier based on Thermal generation unit transformation, it is characterised in that: including boiler, steam turbine, electricity generation system, vapour
Water circulation system；The steam turbine includes high pressure cylinder；The electricity generation system includes generator and excitation system；The steam/water circulating
System includes heat regenerative system, condensate system and water supply system, and the heat regenerative system includes oxygen-eliminating device and high-pressure heater, institute
Stating condensate system includes condenser；
The high temperature and high pressure steam of the boiler is directly entered high pressure cylinder acting；
A part of steam discharge of the high pressure cylinder enters oxygen-eliminating device as temperature end connection；
Another part steam discharge of the high pressure cylinder is connection directly into condenser and is condensed into liquid water；The outlet of the condenser
Liquid water enters after oxygen-eliminating device deoxygenation the water supply for being incorporated to boiler as cold end connection；
The water supply of the boiler enters high-pressure heater as low-temperature end connection；The steam extraction of the high pressure cylinder as temperature end successively
It is connected in series and enters high-pressure heater and oxygen-eliminating device；
The high pressure cylinder rotor and generator amature flexible connection；The excitation system control parameter makes the generator overexcitation
It runs and exports lagging reactive power or underexcited operation to power grid and export capacitive reactive power to power grid.
7. the phase modifier according to claim 6 based on Thermal generation unit transformation, it is characterised in that: the high pressure cylinder turns
A thrust bearing is arranged in one end of son connection generator amature.
8. the phase modifier according to claim 6 based on Thermal generation unit transformation, it is characterised in that: the hyperbaric heating
The high temperature end entrance of device is connected with the level-one extraction line of high pressure cylinder.
9. the phase modifier according to claim 8 based on Thermal generation unit transformation, it is characterised in that: the high pressure cylinder
Level-one extraction line and blow-off line arrange non-return valve.
10. the phase modifier according to claim 6 based on Thermal generation unit transformation, it is characterised in that: the excitation system
It unites and PID adjusting is carried out to the size of exciting current or excitation voltage, make the generator overexcited operation and export and feel to power grid
Property reactive power or underexcited operation and to power grid export capacitive reactive power.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110635621A (en) * | 2019-10-24 | 2019-12-31 | 中国能源建设集团广东省电力设计研究院有限公司 | Method for changing retired generator into self-shunt excitation synchronous phase modulator |
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| CN108758607A (en) * | 2018-05-25 | 2018-11-06 | 内蒙古京能双欣发电有限公司 | A kind of low calorific value coal electricity generation system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110635621A (en) * | 2019-10-24 | 2019-12-31 | 中国能源建设集团广东省电力设计研究院有限公司 | Method for changing retired generator into self-shunt excitation synchronous phase modulator |
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