CN110242370A - The control method and control system model of primary frequency regulation of power network are participated in when a kind of overcritical Reheat-type unit sliding pressure operation - Google Patents
The control method and control system model of primary frequency regulation of power network are participated in when a kind of overcritical Reheat-type unit sliding pressure operation Download PDFInfo
- Publication number
- CN110242370A CN110242370A CN201910452742.0A CN201910452742A CN110242370A CN 110242370 A CN110242370 A CN 110242370A CN 201910452742 A CN201910452742 A CN 201910452742A CN 110242370 A CN110242370 A CN 110242370A
- Authority
- CN
- China
- Prior art keywords
- module
- signal
- reheat
- valve
- power
- 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
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
- 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
- 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
-
- 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
- F01K13/02—Controlling, e.g. stopping or starting
-
- 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
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
-
- 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
- F01K7/32—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 using steam of critical or overcritical pressure
Abstract
The invention discloses control methods and control system model that primary frequency regulation of power network is participated in when a kind of overcritical Reheat-type unit sliding pressure operation, the following steps are included: in the operation of given stable conditions, septum valve standard-sized sheet, reheat control valve standard-sized sheet or is adjusted to default aperture；When network load reduces, generator speed difference signal is obtained and as feed-forward signal, acquisition high voltage adjusting valve signal CV1 and reheat control valve signal CV2；Septum valve aperture regulation signal GV1 is obtained according to high voltage adjusting valve signal CV1, reheat control valve aperture regulation signal GV2 is obtained according to reheat control valve signal CV2；Wherein, septum valve and reheat control valve simultaneously participate in primary frequency modulation, and after adjusting, septum valve is adjusted to full-gear.Control method and control system model of the invention can make to participate in primary frequency regulation of power network when overcritical Reheat-type unit sliding pressure operation, mitigate the change of frequency, maintain the balance of power and load.
Description
Technical field
The invention belongs to supercritical unit primary frequency modulation technical field, in particular to a kind of overcritical Reheat-type unit
The control method and control system model of primary frequency regulation of power network are participated in when sliding pressure operation.
Background technique
Network load changes, and when then mains frequency being caused to change, the unit of whole paired runnings is automatic in power grid
Certain load variations are undertaken to reduce the change of frequency by its static characteristic, and here it is primary frequency modulations.General generating set is equal
Using droop control, primary frequency modulation cannot accurately maintain mains frequency constant, but can mitigate degree and the guarantor of frequency shift
The safety of unit is demonstrate,proved, and very fast to the reacting condition of frequency.When frequency modulation frequency modulation acts, frequency modulation frequency modulation is non differential regulation, can be made
Mains frequency is accurately restored to original rated frequency.After the completion of frequency modulation frequency modulation effect, the governor of primary frequency modulation is participated in
It is restored to original position.
Load between paired running unit is distributed automatically to be carried out according to their own static characteristic, unevenly
Degree is bigger, then the load for distributing to the unit is smaller, and the lesser unit of unevenness undertakes biggish load variations.In general
The unit unevenness of paired running is close, if wherein certain unit unevenness is especially small, the frequency fluctuation meeting of power grid
The fluctuation for causing this power of the assembling unit very big, cisco unity malfunction, electrical network capacity is bigger, and paired running unit unevenness is got over
Small, the stabilization of frequency is more easily guaranteed that.
Overcritical Reheat-type unit is product of the condensing unit to high power development.In order to improve economy, together
When again limit by high-temperature material, at present nearly all high-power saturating unit of condensing be all made of resuperheat.In overcritical
Between reheat-type unit generally use unit style, and be furnished with bypath system and reheat stop interceptor valve, to solve machine furnace minimum load not
Because caused by resuperheat volume the problem of dynamic overspeed when consistent and removal of load.There are two types of basic operation sides for monoblock
Formula: fixed pressure operation and sliding pressure operation.Fixed pressure operation may cause very big restriction loss, therefore, at present substantially all using cunning
Pressure operation.Sliding pressure operation is easier to maintain initial steam temperature and reheat temperature constant in large temperature range, it is ensured that Steam Turbine
Stable internal efficiency is also beneficial to rapid starting/stopping and the operating condition variation of unit, but when sliding pressure operation, septum valve and middle pressure
Regulating valve is standard-sized sheet, while the thermal inertia of boiler is larger, and time constant was up to 100~300 seconds, when network load reduces, nothing
Method timely makes a response and participates in primary frequency modulation.In addition, with the increase for the unit capacity that is incorporated into the power networks, the complexity of rack building
Change, a large amount of introducings of novel batch-type power supply, network load caused by north of china in winter heat demand etc. and the power of the assembling unit arranged side by side are not
The problem of balance, seriously affects the stability of mains frequency.Overcritical Reheat-type unit as the power generation main force is to electricity
Net load variations react i.e. participation primary frequency modulation in time to be just particularly important.
To sum up, the control that primary frequency regulation of power network is participated in when a kind of overcritical Reheat-type unit sliding pressure operation newly is needed
Method.
Summary of the invention
The purpose of the present invention is to provide participate in power grid when a kind of overcritical Reheat-type unit sliding pressure operation once to adjust
The control method and control system model of frequency, in the case of solving above-mentioned overcritical Reheat-type unit sliding pressure operation
The problem of can not participating in primary frequency regulation of power network.Control method and control system model of the invention, can make overcritical centre again
Primary frequency regulation of power network is participated in when hot type unit sliding pressure operation, mitigates the change of frequency, maintains the balance of power and load.
In order to achieve the above objectives, the invention adopts the following technical scheme:
The control method of primary frequency regulation of power network is participated in when a kind of overcritical Reheat-type unit sliding pressure operation, including following
Step:
In the operation of given stable conditions, septum valve standard-sized sheet or is adjusted to default aperture at reheat control valve standard-sized sheet；Power grid
When load reduction, generator speed difference signal is obtained and as feed-forward signal, acquisition high voltage adjusting valve signal CV1 and middle pressure
Adjust valve signal CV2；Septum valve aperture regulation signal GV1 is obtained according to high voltage adjusting valve signal CV1, is adjusted according to middle pressure
Valve signal CV2 obtains reheat control valve aperture regulation signal GV2；Wherein, septum valve and reheat control valve simultaneously participate in one
Secondary frequency modulation, after adjusting, septum valve is adjusted to full-gear.
A further improvement of the present invention is that based on overcritical Reheat-type machine set system include: boiler, high pressure vapour
Turbine, middle-pressure steam turbine, low-pressure turbine, superheater, reheater and condenser；
Boiler is connected by the first pipeline with the air intake of high-pressure turbine through superheater, the venthole of high-pressure turbine
It is connected by the second pipeline with the entrance of reheater, the outlet of reheater passes through the air intake of third pipeline and middle-pressure steam turbine
It is connected, the venthole of middle-pressure steam turbine is connected by the 4th pipeline with the air intake of low-pressure turbine, low-pressure turbine
Venthole is connected with condenser；
High pressure main stop valve and septum valve are provided on first pipeline；Middle pressure stop valve is provided on third pipeline in
Press regulating valve.
A further improvement of the present invention is that based on overcritical Reheat-type unit model include:
By main vapour pressure signal P0Inertia rings are inputted with the signal obtained after septum valve aperture regulation signal GV1 superposition
Section obtains the relative variation d of high pressure cylinder throttle flow0Signal；
d0After the signal that signal obtains after resuperheat inertial element is superimposed with reheat control valve aperture regulation signal GV2
Obtain the relative variation d of intermediate pressure cylinder throttle flow1Signal；
d1Signal is after low pressure inertial element, and obtained low pressure (LP) cylinder is into decatize vapour variable quantity signal；
Steam turbine power output signal P is obtained under power ratio coefficient adjustmentt, steam turbine power output signal PtFor high pressure
The sum of cylinder, intermediate pressure cylinder and low pressure (LP) cylinder three power output.
A further improvement of the present invention is that acquisition obtains real-time generator speed difference signal when network load changes
It is inputted speed regulation dead zone module through rotating speed transducer inertial element module by Δ n, and difference system is adjusted in the output access of speed regulation dead zone module
Digital-to-analogue block, the output of difference coefficient module access the first summation module, and another input of the first summation module is negative for electric system
The output of lotus a reference value Ps, power system load a reference value Ps and difference coefficient module does difference operation acquisition in the first summation module
Power swing signal；
The power swing signal of first summation module output inputs after the gain module amplification that gain coefficient is K4 all the way
Second summation module, another way input third summation module, and another road inputs after the gain module amplification that gain coefficient is K2
4th summation module；Real-time generator power PtThird summation module is inputted after power transducer inertial element module；Third
The signal that summation module goes out successively ask after the gain module amplification that proportion adjustment module P2 and gain coefficient are K3 by input second
And module, the second summation module export reheat control valve signal CV2；The signal that third summation module goes out is successively through proportion adjustment mould
The 4th summation module is inputted after the gain module amplification that block P1 and gain coefficient are K1, the 4th summation module exports septum valve
Signal CV1.
A further improvement of the present invention is that realizing the adjusting of septum valve by high pressure servo-motor；Pass through middle pressure oil
The adjusting of motivation realization reheat control valve；
The deviation of high voltage adjusting valve signal and high pressure servo-motor feedback stroke passes through the ratio of comprehensive magnification wired in parallel
Amplifying element, integral element, the output violent change of comprehensive magnification module, oil motor are overrun unlatching, closing limitation of overrunning, then dynamic through oil
Machine opens or closes adjusting, final output septum valve aperture regulation signal GV1；
Ratio enlargement of the deviation of reheat control valve signal and medium pressure servo-motor feedback stroke Jing Guo comprehensive magnification module
Link, integral element, the output violent change of comprehensive magnification module, oil motor are overrun unlatching, closing limitation of overrunning, then are opened through oil motor
Open or close adjusting, final output reheat control valve aperture regulation signal GV2.
A further improvement of the present invention is that adjusting valve signal when load variations and being also passed to boiler control system, pass through
Controller, executing agency adjust the pressure of fuel adjusting valve aperture and main steam.
A further improvement of the present invention is that the default aperture of reheat control valve is that there are 5%~15% under declared working condition
Throttling.
The control system model of primary frequency regulation of power network, packet are participated in when a kind of overcritical Reheat-type unit sliding pressure operation
It includes: rotating speed transducer inertial element module, speed regulation dead zone module, difference coefficient module, power transducer inertial element module, ratio
Example adjustment module P1, proportion adjustment module P2, the first summation module, the second summation module, third summation module, the 4th summation mould
Block, gain module K1, gain module K2, gain module K3With gain module K4；
The input terminal of rotating speed transducer inertial element module is for receiving generator speed difference signal；Adjust the speed dead zone module
Input terminal is connected with the output end of rotating speed transducer inertial element module；Adjust the speed the output end and difference coefficient mould of dead zone module
The input terminal of block is connected, and the output end of difference coefficient module is connected with the input terminal of the first summation module；First summation mould
The input terminal of block is also used to receive load a reference value；The output end and gain module K of first summation module2Input terminal be connected
It connects；Gain module K2Output end be connected with the input terminal of the 4th summation module；
For the input terminal of power transducer inertial element module for receiving real time engine power signal, power transducer is used
The output end of property link module is connected with the input terminal of third summation module；The output end and proportion adjustment of third summation module
Module P1Input terminal be connected；Proportion adjustment module P1Output end and gain module K1Input terminal be connected, gain module
K1Output end be connected with the input terminal of the 4th summation module；The output end of 4th summation module is for exporting septum valve
Adjusting control signal；
The output end of first summation module also respectively with third summation module and gain module K4Input terminal be connected；Increase
Beneficial module K4Output end be connected with the input terminal of the second summation module；The output end of third summation module also with proportion adjustment
Module P2Input terminal be connected, proportion adjustment module P2Output end and gain module K3Input terminal be connected, gain module
K3Output end be connected with the input terminal of the second summation module；The output end of second summation module is for exporting reheat control valve
Adjusting control signal.
Wherein, the input terminal of rotating speed transducer inertial element module receives actual rotational speed difference signal delta n, subsequently into tune
Fast dead zone module after the signal exceeds dead zone signals, accesses difference coefficient module, and input first simultaneously with load a reference value Ps
Summation module, which carries out doing difference operation, obtains power swing signal；
Actual power Pt access power transmitter inertial element module obtains power measurement signal, then through proportion adjustment module
The gain module that P1 and gain coefficient are K1 amplifies to obtain the power regulating signals of high pressure valve；
First summation module output power swing signal through gain coefficient be K2 gain module amplification after, then with high pressure
The power regulating signals of valve are superimposed in the 4th summation module, and the output of the 4th summation module is high voltage adjusting valve signal CV1；
The signal of third summation module output amplifies through the gain module that proportion adjustment module P2 and gain coefficient are K3
To the power regulating signals of middle pressure valve, the gain module that the power swing signal of the first summation module output is K4 through gain coefficient
It after amplification, then is superimposed in the second summation module with middle pressure valve power regulating signals, the output of the second summation module is that middle pressure is adjusted
Valve signal CV2.
Further, further includes: high pressure servo-motor and medium pressure servo-motor；
The deviation of high voltage adjusting valve signal and high pressure servo-motor feedback stroke passes through the ratio of comprehensive magnification wired in parallel
Amplifying element, integral element, the output violent change of comprehensive magnification module, oil motor are overrun unlatching, closing limitation of overrunning, then dynamic through oil
Machine opens or closes adjusting, final output septum valve aperture regulation signal GV1；
Ratio enlargement of the deviation of reheat control valve signal and medium pressure servo-motor feedback stroke Jing Guo comprehensive magnification module
Link, integral element, the output violent change of comprehensive magnification module, oil motor are overrun unlatching, closing limitation of overrunning, then are opened through oil motor
Open or close adjusting, final output reheat control valve aperture regulation signal GV2.
Compared with prior art, the invention has the following advantages:
The control method for being used to participate in primary frequency regulation of power network when overcritical Reheat-type unit sliding pressure operation of the invention,
When unit is run under declared working condition, septum valve and reheat control valve standard-sized sheet, without restriction loss；When unit load becomes
When change, output power with it is load unbalanced, cause revolving speed to change, passed simultaneously using this rotation speed change signal as feed-forward signal
Septum valve and reheat control valve are passed, through pi controller, by executing agency, controlling opening of valve is utilized
The heat storage capacity of resuperheat vapor volume can dramatically increase the ability for participating in primary frequency modulation when unit sliding pressure operation, improve electricity
The safety and stability of net frequency guarantees the safety of unit.After frequency modulation frequency modulation carries out non differential regulation, primary frequency modulation is participated in
Septum valve and reheat control valve are restored to original aperture, and such control strategy can effectively maintain the pressure of initial steam,
The cycle efficieny of guarantee system, effectively reduces restriction loss.
Control method of the invention, using rotation speed change signal as the feed-forward signal of septum valve and reheat control valve,
The aperture that septum valve and reheat control valve are adjusted by executing agency, realizes overcritical Reheat-type unit sliding pressure operation
When participate in primary frequency regulation of power network, mitigate the change of frequency, maintain the balance of power and load；It is by utilizing Reheat Pipe
Vapor volume, it is sliding can effectively to enhance overcritical Reheat-type unit for reheat control valve and septum valve simultaneously operation
The ability that primary frequency modulation is participated in when pressure operation, reduces the degree of fluctuation of mains frequency, can maintain the perseverance of main steam pressure as far as possible
It is fixed, guarantee the cycle efficieny of system；After frequency modulation frequency modulation, which plays a role, carries out non differential regulation, valve is restored to original position,
Restriction loss can be reduced.
Further, in order to when unit load increases, can participate in responding in time, alleviate the reduction of mains frequency, in
Regulating valve can there are 5%~15% throttlings for pressure.
Controlling model of the invention, it can be achieved that when overcritical Reheat-type unit sliding pressure operation participate in power grid and once adjust
Frequently, the safety and stability for improving mains frequency guarantees the safety of unit.
Detailed description of the invention
Fig. 1 is existing overcritical Reheat-type unit three-level bypath system schematic diagram；
Fig. 2 is existing steam turbine model- following control mode (sliding pressure operation) schematic diagram；
Fig. 3 is existing boiler-turbine coordinated control mode (sliding pressure operation+adjusting control valve opening) schematic diagram；
Fig. 4 is overcritical Reheat-type unit model schematic diagram in the embodiment of the present invention；
Fig. 5 is overcritical Reheat-type unit control system model schematic in the embodiment of the present invention；
Fig. 6 is executing agency's schematic diagram in the embodiment of the present invention；
In figure, 1, boiler；2, high-pressure turbine；3, middle-pressure steam turbine；4, low-pressure turbine；5, superheater；6, reheater；
7, condenser；8, high pressure main stop valve；9, septum valve；10, middle pressure stop valve；11, reheat control valve；12, the first by-passing valve；
13, the second by-passing valve；14, third by-passing valve.
Specific embodiment
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
Referring to Fig. 1, Fig. 1 is the three-level bypath system figure of overcritical Reheat-type unit.Unit is in running on the lower load
When (being lower than declared working condition), its minimum allowable load is generally the 30%~50% of rated capacity for boiler, and load is again
Low to will lead to boiler combustion unstable, and water circulation is destroyed, and leads to boiler flameout；When steam turbine idle running, throttle flow is only needed
The 5%~8% of rated value, therefore the setting of bypath system can handle the surplus steam of boiler.The setting of bypath system can also change
The entry condition of kind monoblock, Large-scale machine set generally use sliding parameter starting, start-up course include red switch, warming-up, raising speed and
Grid-connected on-load etc., each step have different requirements to the pressure, temperature, flow of steam, adjust boiler if relying solely on
Combustion conditions are unable to reach, because the thermal inertia of boiler is larger.High pressure main stop valve 8 and height are set before high-pressure turbine 2
Regulating valve 9 is pressed, presses stop valve 10 and reheat control valve 11 in setting before middle-pressure steam turbine 3, when steam turbine load reduction is less
I.e. mains frequency is greater than 50+0.5HZ, does not need bypath system movement, when sliding pressure operation, since the thermal inertia of boiler is larger, no
Initial steam pressure can be changed in time, rely solely on the vapor volume of Reheat Pipe, adjust the aperture of reheat control valve 11, with
The output power of mesolow steam turbine is reduced, the temporary stabilization of power and load is maintained, alleviates the change of mains frequency, and sliding
When pressure operation, load reduction can be such that unit cycle efficieny is decreased obviously, because initial steam pressure reduction enables unit steam to be used
Enthalpy is reduced, therefore need to adjust reheat control valve aperture and initial steam pressure reduction amplitude, so that the cycle efficieny of system reaches most
It is good.For unit in stable operation, working-medium water absorbs heat in boiler 1, reaches supercriticality through superheater 5, passes through high pressure
After 2 expansion work of steam turbine, reheated device 6 is heated, and then passes sequentially through 4 expansion work of middle-pressure steam turbine 3 and low-pressure turbine,
It most condenses through condenser 7, then reaches by a series of measures into the state before boiler afterwards, so far complete a water circulation.The
One by-passing valve 12, the second by-passing valve 13 and third by-passing valve 14, unit are in closed state when operating normally.
The control of primary frequency regulation of power network is participated in when a kind of overcritical Reheat-type unit sliding pressure operation of the embodiment of the present invention
Method processed, when control strategy includes: stable operation of unit, due to using sliding pressure operation strategy, septum valve and middle pressure are adjusted
Valve standard-sized sheet alleviates the reduction of mains frequency sometimes for when unit load increases, capable of participating in responding in time, and middle pressure is adjusted
Valve can there are 5%~15% throttlings.But when network load reduces suddenly, load reduces suddenly herein refers in the short time in fact
Border load and rated load generate relatively large deviation, interconnection tripping such as occur, and mains frequency increases suddenly, seriously threaten unit peace
Complete and power network safety operation, it is therefore desirable to which Large-scale machine set is reacted in time, is participated in primary frequency modulation, is alleviated mains frequency
Change.At this point, passing to septum valve and reheat control valve simultaneously for generator speed variable signal as feed-forward signal；It passes
The regulative mode of system is that control signal is only passed to septum valve, but since the biggish vapor volume of reheating pipeline will cause
Power is delayed, and therefore, reheat control valve need to act in time, increases the Primary frequency control ability of unit, but work as sliding pressure operation strategy, pot
Furnace is reacted, and adjusts initial steam pressure, and when frequency modulation frequency modulation completes adjustment effect, regulating valve is restored to original aperture,
Reduce restriction loss.
Fig. 2 and Fig. 3 are please referred to, is the regulative mode of overcritical reheating turbine；What Fig. 2 was indicated is steam turbine with
With control mode (sliding pressure operation), regulating valve standard-sized sheet when sliding pressure operation without restriction loss, but can not participate in primary frequency modulation；Fig. 3
What is indicated is boiler-turbine coordinated control mode, and boiler-turbine coordinated control mode is by adjustment signal while to give boiler and steam turbine, one
Aspect can make unit fast reaction using the vapor volume of Reheat Pipe, on the other hand can change simultaneously boiler output again,
Keep initial steam pressure oscillation smaller.
The improvement that Primary frequency control ability is participated in study the invention to unit, establishes overcritical centre as shown in Figure 4 again
The model structure of hot type unit, control system model as shown in Figure 5 have PI controller, feedback loading control in this configuration
Circuit and using rotation speed change signal as the feedforward control of disturbing signal.Wherein, P0The relative variation of-main steam pressure；
Pt- generator actual power；Ps- load a reference value；d0The relative variation of-high pressure cylinder throttle flow；d1- intermediate pressure cylinder is into vapour
The relative variation of amount；TnThe time constant of-rotating speed transducer；TCHThe time constant of-high pressure cylinder vapor volume；TRH- intermediate
The time constant of reheating pipeline vapor volume；TCOThe time constant of-low pressure communicating pipe vapor volume；Tp- power transducer
Time constant；λ-power natural power overshooting coefficient.
In the overcritical Reheat-type unit model of Fig. 4, according to the design feature of supercritical unit, be classified as boiler,
High pressure cylinder, resuperheat volume, intermediate pressure cylinder, low pressure unicom pipeline and low pressure (LP) cylinder part, establish each component and control system respectively
And executing agency dynamic model and be attached.Wherein, TCH、TRHAnd TCOIt respectively represents after high-pressure governing valve and governing stage vapour
Room vapor volume time constant, resuperheat vapor volume time constant and low pressure communicating pipe volume time constant, FHP、FIPWith
FLPThen respectively represent the power ratio coefficient of high, medium and low cylinder pressure.Assume that main vapour pressure is permanent in classical reheat turbine model
It is fixed, however when unit variable parameter operation, main vapour pressure is variation, and main vapour pressure variation will lead to the variation of unit throttle flow, from
And the power output of steam turbine is directly affected, so invention introduces main vapour pressure signal P0As another input, combines pitch and open
Degree signal GV1 is modified unit throttle flow.Superimposed signal obtains the opposite of high pressure cylinder throttle flow through inertial element and becomes
Change amount d0Signal, d0During signal of the signal after resuperheat inertial element is used as after being superimposed with reheat control valve opening amount signal GV2
The relative variation d of cylinder pressure throttle flow1Signal, signal d1After low pressure inertial element, obtained low pressure (LP) cylinder is into decatize vapour variable quantity
Signal obtains high pressure cylinder steam turbine power output signal under power ratio coefficient adjustment, in order to allow emulation can more sturdy border, mention
High model accuracy, unit model introduce high pressure cylinder power natural power overshooting coefficient and are modified to high pressure cylinder acting link；With this
Similar, intermediate pressure cylinder acting link introduces intermediate pressure cylinder power natural power overshooting coefficient and is modified to model.Steam turbine general power output
PtFor the sum of high, medium and low cylinder pressure three power output.
Fig. 5 is overcritical Reheat-type unit control system model, the input terminal of rotating speed transducer inertial element module
Actual generator speed difference signal Δ n is received, subsequently into speed regulation dead zone module, speed regulation dead zone module has processing error
Effect, when error be less than setting skip distance when output be 0, when error be greater than setting skip distance when, the input in dead zone with it is defeated
It is linear out.After generator speed difference signal Δ n exceeds dead zone signals, difference coefficient module, and and electric system are accessed
Load a reference value Ps inputs the first summation module simultaneously to carry out doing difference operation and obtains power swing signal；Real-time generator power Pt
Access power transmitter inertial element module obtains generator power measuring signal, generator power measuring signal and power swing
Amplify to obtain septum valve through the gain module that proportion adjustment module P1 and gain coefficient are K1 again after Signal averaging summation
Power regulating signals；First summation module output power swing signal through gain coefficient be K2 gain module amplification after, then
It carries out feedforward with the power regulating signals of septum valve and is superimposed being output to septum valve and obtaining high voltage adjusting valve signal CV1；
The signal of third summation module output amplifies to obtain middle pressure tune through the gain module that proportion adjustment module P2 and gain coefficient are K3
Save the power regulating signals of valve, the power swing signal of reheat control valve after the gain module amplification that gain coefficient is K4, then
It carries out feedforward with reheat control valve power regulating signals and is superimposed being output to reheat control valve and obtaining reheat control valve signal CV2.
Referring to Fig. 6, the executing agency of regulating system mainly includes high pressure servo-motor and medium pressure servo-motor.Adjust valve signal
Ratio, integral element of the deviation of stroke Jing Guo comprehensive magnification module, the output limit of comprehensive magnification module are fed back with oil motor
Width, oil motor are overrun unlatching, closing limitation of overrunning, then open or close adjusting, final output pitch aperture through oil motor.This
Outside, when load variations, adjustment signal is also passed to boiler control system, and via controller, executing agency adjust fuel control valve
The pressure of door aperture and main steam.Specifically, executing agency's input is valve regulated command signal CV and from feedback element
Valve opening signal exports as valve opening signal GV, and valve command signal CV and valve opening feedback signal are through summation module
New control valve command signal, ratio enlargement link multiple K of the valve command signal through link in parallel are obtained after doing difference operationp
And integral elementThe two links play amplification to signal and increase smooth effect.SPI maxAnd SPI minFor comprehensive magnification ring
Section output bound, VELopenAnd VELcloseIt overruns to open and overrun and closes coefficient, ToAnd TcIt is that oil motor opens and closes respectively
Time constant, at this time valve command adjustment signal pass through valve stroke upper limit PmaxWith offline PminDetermine the tune of valve opening
Adjusting range, last output valve aperture regulation signal GV.
In the present invention, when high pressure cylinder vapor volume time constant, resuperheat volume time constant, low pressure communicating pipe volume
Between the above parameter such as constant, rotating speed transducer time constant, speed-regulating system momentary speed variation can by Adjusting system into
Row parameter identification obtains；The present invention is simulated for certain Reheat-type unit using model above and adjusting method, and with
Test data compares, and the Primary frequency control ability of overcritical Reheat-type unit can be effectively increased by demonstrating the above method, and
Response is very fast.And septum valve feedforward proportionality coefficient and reheat control valve feedforward proportionality coefficient are had studied to adjusting system performance
Influence, the results showed that
(1) unit uses sliding pressure operation control strategy, when load change, using the vapor volume of Reheat Pipe,
Septum valve and reheat control valve are passed to simultaneously using rotation speed change signal as feed-forward signal, makes septum valve and middle pressure
Regulating valve simultaneously operation, can be improved unit to the capability of fast response of load, at the same main steam pressure will not generate it is biggish
Variation, effectively avoids the reduction of unit cycle efficieny.And feedback control is combined with feedforward control, play feedforward control and
The advantage of feedback control respectively, keeps the performance of primary frequency modulation control system higher.
(2) when reheat control valve participates in primary frequency modulation, the feedforward ratio of high pressure mediation valve and reheat control valve should be matched
Example coefficient, the control that otherwise will lead to septum valve have little effect the dynamic response of unit, and then influence entire adjust
The dynamic characteristic of section system.
(3) when sliding pressure operation, the cycle efficieny of system may be made to reduce, therefore maintains the first of initial steam as far as possible
Enthalpy adjusts the aperture of reheat control valve door using the vapor volume of Reheat Pipe, and unit is made to maintain the perseverance of initial steam pressure
It is fixed, it ensure that the cycle efficieny of system.
To solve the problems, such as that primary frequency regulation of power network can not be participated in the case of overcritical Reheat-type unit sliding pressure operation, this
Invention proposes a kind of new control system, believes rotation speed change signal as the feedforward of septum valve and reheat control valve
Number, using resuperheat vapor volume, the aperture of septum valve and reheat control valve is adjusted by executing agency, mitigates frequency
Change, maintain power and load balance.When unit uses sliding pressure operation strategy, when load change, hold using resuperheat
Long-pending accumulation of heat passes to septum valve and reheat control valve simultaneously using rotation speed change signal as feed-forward signal, using ratio
Integration control makes unit quick response, improves the ability that unit participates in primary frequency modulation, maintains the opposite of main steam pressure as possible
Stablize, ensure that the cycle efficieny of system, after the frequency modulation frequency modulation of system plays a role, septum valve and reheat control valve are extensive
Original position is arrived again, avoids excessive restriction loss.
The thermal power steam turbine method of operation is divided into level pressure and sliding pressure operation mode.Initial steam pressure and temperature under pressurization methods
It remains unchanged, aperture regulation unit load, the regulating valve standard-sized sheet of sliding pressure operation mode tubine, by changing is changed by valve
Become main steam pressure to adjust the power of steam turbine.Unit fixed pressure operation biggish for Steam Turbine generated output jumps hair valve
Average crushing be higher than sliding pressure operation control valve average crushing.A kind of overcritical Reheat-type machine proposed in the present invention
Primary frequency regulation of power network is participated in when group sliding pressure operation, efficiently solves and causes the biggish crushing of control valve under the conditions of fixed pressure operation,
And easily cause unbalance between grid power and load when individually overcritical sliding pressure operation unit generation load is grid-connected, it cannot make
Power grid stablize safe operation, the invention proposes under the conditions of sliding pressure operation to Steam Turbine high pressure valve and middle pressure valve controlling party
Method enables the variation between unit quick response power and load, and after frequency modulation frequency modulation completes accurate frequency modulation, control valve restores
To original valve opening, average throttle loss is largely effectively reduced.
In conclusion the invention proposes a kind of new to participate in electricity when being used for overcritical Reheat-type unit sliding pressure operation
The control method of net primary frequency modulation by the heat storage capacity using Reheat Pipe, while adjusting septum valve and middle pressure
The aperture of regulating valve, and the control strategy of sliding pressure operation is combined, so that unit is participated in primary frequency modulation.In the present invention, unit is using cunning
The control strategy for pressing operation, when unit load changes, which passes simultaneously using rotation speed change signal as feed-forward signal
Pass septum valve and reheat control valve, septum valve and reheat control valve simultaneously operation, make unit to load variations into
Row fast reaction, maintenance initial steam pressure is constant as far as possible, improves the ability of unit response load variations, maintains power grid frequency
The stabilization of rate guarantees the cycle efficieny of system.It plays a role to frequency modulation frequency modulation, primary frequency modulation is laid down, valve is restored to originally
Position.The regulating time of primary frequency modulation is extremely short, and in combination with sliding pressure operation strategy, the movement of reheat control valve will not be generated
Excessive restriction loss.
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although referring to above-described embodiment pair
The present invention is described in detail, those of ordinary skill in the art still can to a specific embodiment of the invention into
Row modification perhaps equivalent replacement these without departing from any modification of spirit and scope of the invention or equivalent replacement, applying
Within pending claims of the invention.
Claims (10)
1. participating in the control method of primary frequency regulation of power network when a kind of overcritical Reheat-type unit sliding pressure operation, feature exists
In, comprising the following steps:
In the operation of given stable conditions, septum valve standard-sized sheet or is adjusted to default aperture at reheat control valve standard-sized sheet；Network load
When reduction, obtains generator speed difference signal and adjusted as feed-forward signal, acquisition high voltage adjusting valve signal CV1 and middle pressure
Valve signal CV2；Septum valve aperture regulation signal GV1 is obtained according to high voltage adjusting valve signal CV1, is believed according to reheat control valve
Number CV2 obtains reheat control valve aperture regulation signal GV2；Wherein, septum valve and reheat control valve simultaneously participate in primary tune
Frequently, after adjusting, septum valve is adjusted to full-gear.
2. participating in primary frequency regulation of power network when a kind of overcritical Reheat-type unit sliding pressure operation according to claim 1
Control method, which is characterized in that based on overcritical Reheat-type machine set system include: boiler, high-pressure turbine, middle pressure vapour
Turbine, low-pressure turbine, superheater, reheater and condenser；
Boiler is connected by the first pipeline with the air intake of high-pressure turbine through superheater, and the venthole of high-pressure turbine passes through
Second pipeline is connected with the entrance of reheater, and the outlet of reheater is connected by third pipeline with the air intake of middle-pressure steam turbine
Logical, the venthole of middle-pressure steam turbine is connected by the 4th pipeline with the air intake of low-pressure turbine, and low-pressure turbine goes out vapour
Mouth is connected with condenser；
High pressure main stop valve and septum valve are provided on first pipeline；It is provided with middle pressure stop valve on third pipeline and middle pressure is adjusted
Save valve.
3. participating in primary frequency regulation of power network when a kind of overcritical Reheat-type unit sliding pressure operation according to claim 1
Control method, which is characterized in that based on overcritical Reheat-type unit model include:
By main vapour pressure signal P0It is obtained with the signal input inertial element obtained after septum valve aperture regulation signal GV1 superposition
To the relative variation d of high pressure cylinder throttle flow0Signal；
d0The signal that signal obtains after resuperheat inertial element obtains after being superimposed with reheat control valve aperture regulation signal GV2
The relative variation d of intermediate pressure cylinder throttle flow1Signal；
d1Signal is after low pressure inertial element, and obtained low pressure (LP) cylinder is into decatize vapour variable quantity signal；
Steam turbine power output signal P is obtained under power ratio coefficient adjustmentt, steam turbine power output signal PtFor high pressure cylinder, in
The sum of cylinder pressure and low pressure (LP) cylinder three power output.
4. participating in primary frequency regulation of power network when a kind of overcritical Reheat-type unit sliding pressure operation according to claim 1
Control method, which is characterized in that when network load changes, acquisition obtains real-time generator speed difference signal Δ n, by it through turning
Fast transmitter inertial element module input speed regulation dead zone module, the output of speed regulation dead zone module access difference coefficient module, and it is poor to adjust
The output of coefficient module accesses the first summation module, and another input of the first summation module is power system load a reference value Ps,
The output of power system load a reference value Ps and difference coefficient module does difference operation in the first summation module and obtains power swing letter
Number；
The power swing signal of first summation module output inputs second after the gain module amplification that gain coefficient is K4 all the way
Summation module, another way input third summation module, and another road inputs the 4th after the gain module amplification that gain coefficient is K2
Summation module；Real-time generator power PtThird summation module is inputted after power transducer inertial element module；Third summation
The signal that module goes out successively inputs the second summation mould after the gain module amplification that proportion adjustment module P2 and gain coefficient are K3
Block, the second summation module export reheat control valve signal CV2；The signal that third summation module goes out is successively through proportion adjustment module P1
With gain coefficient to input the 4th summation module after the gain module amplification of K1, the 4th summation module exports high voltage adjusting valve signal
CV1。
5. participating in primary frequency regulation of power network when a kind of overcritical Reheat-type unit sliding pressure operation according to claim 1
Control method, which is characterized in that the adjusting of septum valve is realized by high pressure servo-motor；By medium pressure servo-motor realize in press
The adjusting of regulating valve；
The deviation of high voltage adjusting valve signal and high pressure servo-motor feedback stroke passes through the ratio enlargement of comprehensive magnification wired in parallel
Link, integral element, the output violent change of comprehensive magnification module, oil motor are overrun unlatching, closing limitation of overrunning, then are opened through oil motor
Open or close adjusting, final output septum valve aperture regulation signal GV1；
Ratio enlargement link of the deviation Jing Guo comprehensive magnification module of reheat control valve signal and medium pressure servo-motor feedback stroke,
Integral element, the output violent change of comprehensive magnification module, oil motor overrun unlatching, overrun closing limitation, then through oil motor open or
It closes and adjusts, final output reheat control valve aperture regulation signal GV2.
6. participating in primary frequency regulation of power network when a kind of overcritical Reheat-type unit sliding pressure operation according to claim 5
Control method, which is characterized in that when load variations, adjust valve signal and be also passed to boiler control system, via controller, execution
Mechanism adjusts the pressure of fuel adjusting valve aperture and main steam.
7. participating in electricity when a kind of overcritical Reheat-type unit sliding pressure operation according to any one of claim 1 to 6
The control method of net primary frequency modulation, which is characterized in that under declared working condition, the default aperture of reheat control valve be there are 5%~
15% throttling.
8. participating in the control system model of primary frequency regulation of power network, feature when a kind of overcritical Reheat-type unit sliding pressure operation
It is, comprising: rotating speed transducer inertial element module, speed regulation dead zone module, difference coefficient module, power transducer inertial element
Module, proportion adjustment module P1, proportion adjustment module P2, the first summation module, the second summation module, third summation module, the 4th
Summation module, gain module K1, gain module K2, gain module K3With gain module K4；
The input terminal of rotating speed transducer inertial element module is for receiving generator speed difference signal；Adjust the speed the input of dead zone module
End is connected with the output end of rotating speed transducer inertial element module；Adjust the speed the output end and difference coefficient module of dead zone module
Input terminal is connected, and the output end of difference coefficient module is connected with the input terminal of the first summation module；First summation module
Input terminal is also used to receive load a reference value；The output end and gain module K of first summation module2Input terminal be connected；Increase
Beneficial module K2Output end be connected with the input terminal of the 4th summation module；
The input terminal of power transducer inertial element module is for receiving real time engine power signal, power transducer inertia rings
The output end of section module is connected with the input terminal of third summation module；The output end and proportion adjustment module of third summation module
P1Input terminal be connected；Proportion adjustment module P1Output end and gain module K1Input terminal be connected, gain module K1's
Output end is connected with the input terminal of the 4th summation module；The output end of 4th summation module is used to export the tune of septum valve
Section control signal；
The output end of first summation module also respectively with third summation module and gain module K4Input terminal be connected；Gain mould
Block K4Output end be connected with the input terminal of the second summation module；The output end of third summation module also with proportion adjustment module
P2Input terminal be connected, proportion adjustment module P2Output end and gain module K3Input terminal be connected, gain module K3's
Output end is connected with the input terminal of the second summation module；The output end of second summation module is used to export the tune of reheat control valve
Section control signal.
9. participating in primary frequency regulation of power network when a kind of overcritical Reheat-type unit sliding pressure operation according to claim 8
Control system model, which is characterized in that the input terminal of rotating speed transducer inertial element module receives actual rotational speed difference signal delta
N, subsequently into speed regulation dead zone module, the signal exceed dead zone signals after, access difference coefficient module, and with load a reference value Ps
The first summation module is inputted simultaneously carry out doing difference operation obtain power swing signal；
Actual power Pt access power transmitter inertial element module obtains power measurement signal, then through proportion adjustment module P1 and
Gain coefficient is that the gain module of K1 amplifies to obtain the power regulating signals of high pressure valve；
First summation module output power swing signal through gain coefficient be K2 gain module amplification after, then with high pressure valve
Power regulating signals are superimposed in the 4th summation module, and the output of the 4th summation module is high voltage adjusting valve signal CV1；
During the signal of third summation module output amplifies to obtain through the gain module that proportion adjustment module P2 and gain coefficient are K3
The power swing signal of the power regulating signals of pressure valve, the output of the first summation module amplifies through the gain module that gain coefficient is K4
Afterwards, then with middle pressure valve power regulating signals in the second summation module it is superimposed, the output of the second summation module is reheat control valve letter
Number CV2.
10. participating in power grid when a kind of overcritical Reheat-type unit sliding pressure operation according to claim 8 or claim 9 once to adjust
The control system model of frequency, which is characterized in that further include: high pressure servo-motor and medium pressure servo-motor；
The deviation of high voltage adjusting valve signal and high pressure servo-motor feedback stroke passes through the ratio enlargement of comprehensive magnification wired in parallel
Link, integral element, the output violent change of comprehensive magnification module, oil motor are overrun unlatching, closing limitation of overrunning, then are opened through oil motor
Open or close adjusting, final output septum valve aperture regulation signal GV1；
Ratio enlargement link of the deviation Jing Guo comprehensive magnification module of reheat control valve signal and medium pressure servo-motor feedback stroke,
Integral element, the output violent change of comprehensive magnification module, oil motor overrun unlatching, overrun closing limitation, then through oil motor open or
It closes and adjusts, final output reheat control valve aperture regulation signal GV2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910452742.0A CN110242370B (en) | 2019-05-28 | 2019-05-28 | Control method and control system model for participating in primary frequency modulation of power grid during sliding pressure operation of supercritical intermediate reheating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910452742.0A CN110242370B (en) | 2019-05-28 | 2019-05-28 | Control method and control system model for participating in primary frequency modulation of power grid during sliding pressure operation of supercritical intermediate reheating unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110242370A true CN110242370A (en) | 2019-09-17 |
| CN110242370B CN110242370B (en) | 2020-10-27 |
Family
ID=67885158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910452742.0A Active CN110242370B (en) | 2019-05-28 | 2019-05-28 | Control method and control system model for participating in primary frequency modulation of power grid during sliding pressure operation of supercritical intermediate reheating unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110242370B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377275A (en) * | 2020-11-18 | 2021-02-19 | 润电能源科学技术有限公司 | Operation control method, device and equipment for throttling steam distribution turbine |
| CN112539089A (en) * | 2020-11-10 | 2021-03-23 | 北方魏家峁煤电有限责任公司 | Low-voltage bypass control method and device and electronic equipment |
| CN113991703A (en) * | 2021-10-29 | 2022-01-28 | 华能海南发电股份有限公司东方电厂 | Primary frequency modulation time interval control system and method for coal-fired generator set |
| CN114076005A (en) * | 2021-11-02 | 2022-02-22 | 神华国华寿光发电有限责任公司 | Medium-pressure heat supply system, control device and medium-pressure heat supply method |
| CN114076004A (en) * | 2021-11-02 | 2022-02-22 | 神华国华寿光发电有限责任公司 | Medium-pressure heat supply system and medium-pressure heat supply method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100304702A1 (en) * | 2009-06-01 | 2010-12-02 | Apple Inc. | Radio receiver |
| CN105896569A (en) * | 2016-04-12 | 2016-08-24 | 国网上海市电力公司 | Supercritical unit CCS side primary frequency modulation method |
| CN106527131A (en) * | 2016-10-27 | 2017-03-22 | 哈尔滨工业大学 | Model used for carrying out primary frequency modulation analysis coordination control on boiler, steam turbine and power grid |
| CN106780103A (en) * | 2016-11-17 | 2017-05-31 | 哈尔滨工业大学 | A kind of direct current cooker, steam turbine, electric network coordination control method for primary frequency modulation analysis |
| CN109638861A (en) * | 2018-12-25 | 2019-04-16 | 国网陕西省电力公司电力科学研究院 | A kind of supercritical unit participates in the control method and control system model of primary frequency modulation |
-
2019
- 2019-05-28 CN CN201910452742.0A patent/CN110242370B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100304702A1 (en) * | 2009-06-01 | 2010-12-02 | Apple Inc. | Radio receiver |
| CN105896569A (en) * | 2016-04-12 | 2016-08-24 | 国网上海市电力公司 | Supercritical unit CCS side primary frequency modulation method |
| CN106527131A (en) * | 2016-10-27 | 2017-03-22 | 哈尔滨工业大学 | Model used for carrying out primary frequency modulation analysis coordination control on boiler, steam turbine and power grid |
| CN106780103A (en) * | 2016-11-17 | 2017-05-31 | 哈尔滨工业大学 | A kind of direct current cooker, steam turbine, electric network coordination control method for primary frequency modulation analysis |
| CN109638861A (en) * | 2018-12-25 | 2019-04-16 | 国网陕西省电力公司电力科学研究院 | A kind of supercritical unit participates in the control method and control system model of primary frequency modulation |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112539089A (en) * | 2020-11-10 | 2021-03-23 | 北方魏家峁煤电有限责任公司 | Low-voltage bypass control method and device and electronic equipment |
| CN112377275A (en) * | 2020-11-18 | 2021-02-19 | 润电能源科学技术有限公司 | Operation control method, device and equipment for throttling steam distribution turbine |
| CN113991703A (en) * | 2021-10-29 | 2022-01-28 | 华能海南发电股份有限公司东方电厂 | Primary frequency modulation time interval control system and method for coal-fired generator set |
| CN114076005A (en) * | 2021-11-02 | 2022-02-22 | 神华国华寿光发电有限责任公司 | Medium-pressure heat supply system, control device and medium-pressure heat supply method |
| CN114076004A (en) * | 2021-11-02 | 2022-02-22 | 神华国华寿光发电有限责任公司 | Medium-pressure heat supply system and medium-pressure heat supply method |
| CN114076004B (en) * | 2021-11-02 | 2023-08-25 | 国能寿光发电有限责任公司 | Medium-pressure heat supply system and medium-pressure heat supply method |
| CN114076005B (en) * | 2021-11-02 | 2023-08-25 | 国能寿光发电有限责任公司 | Medium-pressure heat supply system, control device and medium-pressure heat supply method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110242370B (en) | 2020-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110242370A (en) | The control method and control system model of primary frequency regulation of power network are participated in when a kind of overcritical Reheat-type unit sliding pressure operation | |
| Nanda et al. | Some new findings on automatic generation control of an interconnected hydrothermal system with conventional controllers | |
| CN101609312B (en) | Generating set optimization control method for correcting sliding pressure operation curve by adopting steam consumption rate | |
| CN109638861B (en) | Control method and control system model for supercritical unit to participate in primary frequency modulation | |
| Pathak et al. | AGC of two area power system based on different power output control strategies of thermal power generation | |
| CN101864994A (en) | Correction method for optimization of sliding pressure of large steam turbine | |
| CN110792482A (en) | Control system and method for ultra-supercritical secondary reheating unit to participate in primary frequency modulation of power grid | |
| CN112564128A (en) | Control system and method for electrolytic aluminum load participating in power grid frequency modulation | |
| CN106801890B (en) | Reduce the method for boiler main reheat steam temperature fluctuation during lifting load | |
| CN113107623A (en) | Device and method for improving heat supply steam extraction parameters during low-load operation of double-low-pressure-cylinder steam turbine | |
| CN105134312B (en) | A kind of subcritical nozzle governing steam turbine operation valve position determines method | |
| Encabo Caceres et al. | Flexible operation of combined cycle gas turbine power plants with supplementary firing | |
| CN109378833A (en) | A method of unit fast frequency hopping is realized by control extraction flow of steam | |
| CN211819542U (en) | Thermodynamic system for quick load response of heat supply unit | |
| CN108227518A (en) | A kind of modification method and device of steam turbine simulation model | |
| CN110656991A (en) | Injection gas distribution thermoelectric decoupling mode based on axial thrust balance and reheating balance | |
| CN105134311A (en) | Running valve position determining method for supercritical/ultra-supercritical nozzle governing turbine | |
| CN209978005U (en) | Primary frequency modulation control system for secondary reheating unit | |
| CN110120675A (en) | A kind of photo-thermal power generation participates in the device and control system and method for primary frequency regulation of power network | |
| CN113914950B (en) | Ultra-supercritical double-reheat multi-extraction steam turbine set and thermal decoupling control method | |
| CN113110316B (en) | Primary frequency modulation control method for steam turbine of combined cycle unit | |
| CN208073572U (en) | A kind of power grid frequency modulation system based on frequency modulation bypass | |
| CN114233403A (en) | High-efficient turbo electric power generation system of degree of depth peak regulation that split-axis was arranged | |
| CN113006891A (en) | Comprehensive frequency modulation system and method for coupling heat supply and low-pressure steam extraction | |
| CN210889050U (en) | Control system for ultra-supercritical secondary reheating unit to participate in primary frequency modulation of power grid |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |