CN106948890B - A kind of method of warming up suitable for high pressure combined launch Turbo-generator Set - Google Patents
A kind of method of warming up suitable for high pressure combined launch Turbo-generator Set Download PDFInfo
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- CN106948890B CN106948890B CN201710227295.XA CN201710227295A CN106948890B CN 106948890 B CN106948890 B CN 106948890B CN 201710227295 A CN201710227295 A CN 201710227295A CN 106948890 B CN106948890 B CN 106948890B
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- warming
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- 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
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- 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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Abstract
The invention discloses a kind of method of warming up suitable for high pressure combined launch Turbo-generator Set, the present invention is on the basis of unit original revolution speed control system, increase the logic of a set of automatic warming, by to Turbo-generator Set deh control system mesohigh stop valve bit function g (Δ x) and reheat control valve bit function h (the real-time amendment of Δ x), realize the overall process automatic warming of senior school biology unit, that there are warm-up periods is long for the Turbo-generator Set for solving using high pressure combined launch, the insufficient problem of warming-up, it also can solve existing reduction parameter starting warming-up technology while energy-saving and emission-reduction simultaneously and run bring security risk to unit, it can overcome the shortcomings of currently available technology.
Description
Technical field
The invention belongs to thermal power generating technology fields, are related to a kind of adaptable, high degree of automation, can shorten senior middle school
The method for pressing the Turbo-generator Set warm-up period and warming-up effect of combined launch.
Background technique
Basically, steam turbine warming-up effect and the throttle flow of each cylinder body have relationship.It is grid-connected in unit starting warming-up
Before, cylinder body throttle flow is only related with revolving speed, and warming-up is that (general Turbo-generator Set warming-up revolving speed divides low speed in a certain determining revolving speed
Warming-up, medium-speed warming and high speed warming-up) under complete, if energy needed for unit is certain in the case that warming-up steam parameter is certain,
I.e. throttle flow is certain, therefore how each cylinder throttle flow of coordinated allocation becomes key.Existing Turbo-generator Set warming-up technology
It is main that warming-up is carried out using reduction warming-up parameter mode, that is, reduce the modes such as master, reheated steam parameter, unit vacuum.Existing skill
Art, which has the following deficiencies:, reduces warming-up parameter, and the decline of energy entrained by steam, middle pressure is adjusted in the case that warming-up revolving speed is constant
Valve can not turn off greatly to increase throttle flow, until high pressure main stop valve can be just turned on when generating unit speed cannot maintain, this is a kind of
More passively adjustment mode.Although the method for drop parameter can make unit starting warming-up obtain good effect, do not consider to drop
The unfavorable aspect of other equipment after low parameter.(1) do not consider to reduce (providing for unit to boiler after main, reheated steam parameter
Steam) it influences.Boiler combustion load, low load combustion mode will certainly be reduced while steam turbine starting warming-up reduces parameter
Lower boiler (especially supercritical once-through boiler) is easy to happen uneven burning, thermal deviation accumulation, back-end surfaces and superheater
Overtemperature of tube wall, it is serious when even the problems such as putting out a fire, while reducing and leading, after reheated steam pressure, be easy to cause boiler hydrodynamic(al)
Power is unstable, and too low main vapour pressure makes the mass velocity not being able to maintain in water-cooling wall water-cooling wall film boiling occurs, and leads
Cause booster.(2) vacuum reduces excessive in unit starting warming-up process, and heat send out thermogenetic in cylinder internal cause air blast can cause metal to surpass
Temperature, while being unfavorable for controlling the upper and lower temperature difference of the cylinder of unit, it will lead to rubbing between blade damage or steam turbine sound component when serious
It wipes, so that turbine component be caused seriously to damage.
Summary of the invention
The present invention is to increase the logic of a set of automatic warming, by right on the basis of unit original revolution speed control system
((Δ x's) is real-time by Δ x) and reheat control valve bit function h by Turbo-generator Set deh control system mesohigh stop valve bit function g
The overall process automatic warming of senior school biology unit is realized in amendment.It solves to send out using the steamer of high pressure combined launch
Motor group there are warm-up periods long, the insufficient problem of warming-up also can solve existing reduction parameter starting while energy-saving and emission-reduction
Warming-up technology runs bring security risk to unit.
A kind of technical solution provided by the invention are as follows: the side of fast and stable revolving speed after the removal of load for Turbo-generator Set
Method, comprising the following steps:
The first step, after Turbo-generator Set reaches warming-up revolving speed, DEH revolving speed control according to setting speed ω1With reality
Rotational speed omega2Deviation Δ ω, Turbo-generator Set actual speed value and setting speed value base are controlled by PID controller A always
This is consistent；
Second step, operations staff put into warm cylinder mode, select the cylinder body for needing preferentially to warm up, and set heating rate t1Afterwards, DEH
Temp measuring system meeting real-time detection center housing temperature and the practical temperature rise rate t for calculating cylinder body2, set heating rate t1With practical heating speed
Rate t2Heating rate deviation Δ t is exported more afterwards1；
Third step, deviation Δ t1Δ t is exported after height limits module, after deviation Δ t is then inputted PID controller B,
The output bias value Δ x after PID controller B calculating2With Δ x3；
4th step, deviation Δ x2With Δ x3It is superimposed upon high pressure main stop valve bit function and reheat control valve bit function mould respectively
On block, the on or off of main inlet throttle-stop valve and middle pitch is controlled.
The mathematical computations expression formula of the Δ ω are as follows:
Δ ω=ω1-ω2
In formula: revolving speed deviation Δ ω, setting speed ω1, with actual speed ω2。
The heating rate deviation Δ t1Mathematic(al) representation are as follows:
Δ t=t1-t2
In formula: setting heating rate t1, practical heating rate t2, heating rate deviation Δ t1。
The deviation Δ x2With Δ x3Mathematical relationship expression formula and valve correspond to aperture relationship are as follows:
In formula: Δ x1For the comprehensive valve bit instruction that PID controller 1 exports, corresponding number is 0%~100%；Δ x is Δ x1
Valve bit instruction after rate limit, corresponding number are 0%~100%；Δx2、Δx3For the amendment valve of PID controller B output
Bit instruction, corresponding number are 0%~100%；g(Δx+Δx2) be and Δ x+ Δ x2Relevant linear function, the corresponding main vapour of high pressure
The full pass (0%) of door and standard-sized sheet (100%)；h(Δx+Δx3) be and Δ x+ Δ x3Relevant linear function, it is corresponding in press and adjust
The full pass (0%) of door and standard-sized sheet (100%).
The cylinder body includes high pressure cylinder and intermediate pressure cylinder.
Using technical solution of the present invention, in high pressure main stop valve bit function g (Δ x) and reheat control valve bit function h (Δ x)
A set of logic in parallel before module (for confirming the investment of warm cylinder mode, and selects preferential warm anticyclone cylinder also by warm cylinder selecting module
Intermediate pressure cylinder, the module put into whether decide whether this set logic works), cylinder temperature rise rate setting module t1(for setting
Desired warm cylinder temperature rise rate), cylinder temperature temperature rise rate computing module t2(for calculating the actual cylinder temperature rise rate of current unit), high limit
Module (for judge current cylinder temperature rise rate whether be more than setting limits value), PID controller B (receive input value and by one
Output valve is provided after fixed regular operation) composition.
Its warming-up logical action principle are as follows: after Turbo-generator Set reaches warming-up revolving speed, DEH revolving speed is controlled according to setting
Rotational speed omega1With actual speed ω2Deviation Δ ω situation (positive value open the door, bear to close the door), steamer is controlled by controller A always
Generating set actual speed value is worth almost the same with setting speed.When operations staff puts into warm cylinder mode, selection needs preferential warm
Cylinder body (high pressure cylinder or intermediate pressure cylinder), set desired setting heating rate t1Afterwards, DEH temp measuring system can measure cylinder body temperature in real time
Spend and calculate the practical temperature rise rate t of cylinder body2, setting value rear output bias value Δ t compared with actual value1, Δ t1After height limits module
Δ t is exported, Δ t exports Δ x after inputting PID controller B2、Δx3, Δ x2、Δx3Be superimposed upon respectively high pressure main stop valve bit function and
In reheat control valve bit function module, the on or off of main inlet throttle-stop valve and middle pitch is determined.
Compared with the prior art, 2~3 times faster than prior art method of warming up of method of warming up of the invention, by manufacturer's recommended
The medium-speed warming time 150 minutes, compared with prior art, the present invention saving between 150 minutes to 300 minutes time, take
Between value 225 minutes, be 3.75 hours.Boiler can put into 6~8 oil guns in red switch warming-up process, and every Oil Gun exists
1.0t/h or so, with the minimum output calculation of boiler oil gun, the present invention can save during each cold start of the type unit
Fuel oil 6t/h × 3.75h=22.5t, fuel cost 22.5t × 0.8 (Wan Yuan)/t=18 (Wan Yuan).It is designed by producer, the life-cycle
The unit can be cold start 300 times in range, and 48,000,000 yuan can be saved for every unit by converting.The whole nation is combined using high pressure opens
Motivation group accounts for the half of domestic whole installed capacitys or more, therefore the Technique Popularizing has a extensive future.
Detailed description of the invention
Fig. 1 is the revolution speed control system schematic illustration that the present invention is used for warming-up；
Attached drawing 2 is revolution speed control system schematic illustration；
Attached drawing 3: for turbogenerator thermal system schematic diagram；
Fig. 4 is the high pressure cylinder parameter before prior art warming-up starts；
Fig. 5 is the high pressure cylinder parameter before prior art warming-up terminates；
Fig. 6 is the high pressure cylinder parameter before warming-up of the present invention starts；
Fig. 7 is the high pressure cylinder parameter before warming-up of the present invention terminates.
Specific embodiment
The preferred implementation case that the invention will now be described in detail with reference to the accompanying drawings.
The 660MW supercritical turbine generator group that certain factory is produced by Harbin steam turbine, model N660-24.2/566/
566: using senior school biology mode.The prior art mainly increases each cylinder to reduce unit starting warming-up parameter
Throttle flow, especially to reduce intermediate pressure cylinder steam inlet condition, when intermediate pressure cylinder cannot maintain unit warming-up revolving speed, the height of high pressure cylinder
Pressure main inlet throttle-stop valve just can be opened gradually, to achieve the purpose that warming-up, whether high pressure cylinder is sufficiently Turbo-generator Set warming-up into vapour
Key.The present invention using high, intermediate pressure cylinder sharing of load ratio is actively changed, can effectively control each cylinder into vapour opportunity and
Throttle flow, using flexible.By taking warm anticyclone cylinder as an example: the temperature rise after implementing by the warming-up curve under the prior art and by this patent is bent
Line is as shown in attached drawing 4,5,6,7:
2 present invention of table and the prior art are to high pressure cylinder warming-up Contrast on effect
From upper table 2: (1) method for pressing existing reduction starting warming-up parameter, unit warming-up 17 minutes 7 hours, high pressure
Vapor (steam) temperature goes up 265 DEG C from 112 DEG C at governing stage in cylinder；0.35 DEG C/min of average temperature rising rate；Governing stage gold in high pressure cylinder
Belong to temperature to go up from 110 DEG C to 277 DEG C, 0.38 DEG C/min of average temperature rising rate
(2) press the invention patent method: unit warming-up 4 minutes 2 hours, in high pressure cylinder at governing stage vapor (steam) temperature from 187
DEG C go up to 301 DEG C, 0.92 DEG C/min of average temperature rising rate；Governing stage metal temperature goes up from 148 DEG C to 308 in high pressure cylinder
DEG C, 1.29 DEG C/min of average temperature rising rate
(3) 2~3 times faster than prior art method of warming up of method of warming up of the invention, by manufacturer's recommended medium-speed warming when
Between 150 minutes, compared with prior art, the present invention save 150 minutes to 300 minutes time between, take median 225 minutes,
It is 3.75 hours.Boiler can put into 6~8 oil guns in red switch warming-up process, and every Oil Gun is in 1.0t/h or so, with pot
The minimum output calculation of furnace oil rifle, the present invention can saving fuel oil 6t/h × 3.75h during each cold start of the type unit
=22.5t, fuel cost 22.5t × 0.8 (Wan Yuan)/t=18 (Wan Yuan).It is designed by producer, the unit can in alllife range
Cold start 300 times, 48,000,000 yuan can be saved for every unit by converting.The whole nation accounts for whole dresses using high pressure combined launch unit
More than the half of machine capacity, therefore the Technique Popularizing has a extensive future.
Claims (4)
1. a kind of method of warming up suitable for high pressure combined launch Turbo-generator Set, it is characterised in that: the following steps are included:
The first step, after Turbo-generator Set reaches warming-up revolving speed, DEH revolving speed control according to setting speed ω1With actual speed
ω2Deviation Δ ω, it is consistent with setting speed value that Turbo-generator Set actual speed value is controlled by PID controller A always；
Second step, operations staff put into warm cylinder mode, select the cylinder body for needing preferentially to warm up, and set heating rate t1Afterwards, DEH thermometric
System meeting real-time detection center housing temperature and the practical temperature rise rate t for calculating cylinder body2, set heating rate t1With practical heating rate t2
Heating rate deviation Δ t is exported more afterwards1；
Third step, deviation Δ t1Δ t is exported after height limits module, deviation Δ t inputs PID controller B, through PID controller B
Output bias value Δ x after calculating2With Δ x3；
4th step, deviation Δ x2With Δ x3It is superimposed upon in high pressure main stop valve bit function and reheat control valve bit function module respectively,
Control the on or off of main inlet throttle-stop valve and middle pitch；
Deviation Δ x, Δ x2With Δ x3Mathematical relationship expression formula and valve correspond to aperture relationship are as follows:
In formula: Δ x1For the comprehensive valve bit instruction of PID controller A output, corresponding number is 0%~100%；Δ x is Δ x1Through speed
Valve bit instruction after rate limitation, corresponding number are 0%~100%；Δx2、Δx3Amendment valve position for PID controller B output refers to
It enables, corresponding number is 0%~100%；g(Δx+Δx2) be and Δ x+ Δ x2Relevant linear function, corresponding high-pressure main throttle valve
It is complete to close (0%) and standard-sized sheet (100%)；h(Δx+Δx3) be and Δ x+ Δ x3Relevant linear function, it is corresponding in pressure adjust door
It is complete to close (0%) and standard-sized sheet (100%).
2. a kind of method of warming up suitable for high pressure combined launch Turbo-generator Set according to claim 1, special
Sign is: the mathematical computations expression formula of the Δ ω are as follows:
Δ ω=ω1-ω2
In formula: revolving speed deviation Δ ω, setting speed ω1, with actual speed ω2。
3. a kind of method of warming up suitable for high pressure combined launch Turbo-generator Set according to claim 1,
It is characterized by: the heating rate deviation Δ t1Mathematic(al) representation are as follows:
Δ t=t1-t2
In formula: setting heating rate t1, practical heating rate t2, heating rate deviation Δ t1。
4. a kind of method of warming up suitable for high pressure combined launch Turbo-generator Set according to claim 1, special
Sign is: the cylinder body includes high pressure cylinder and intermediate pressure cylinder.
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| CN109597301B (en) * | 2017-09-30 | 2021-11-16 | 上海梅山钢铁股份有限公司 | Main steam temperature optimization control method for coke dry quenching waste heat boiler |
| CN110131002B (en) * | 2018-02-09 | 2021-08-06 | 上海明华电力科技有限公司 | High and medium pressure cylinder combined starting control method for subcritical unit based on environmental protection target |
| CN109356675B (en) * | 2018-12-13 | 2021-10-22 | 浙江医药高等专科学校 | Automatic starting control method for water feeding pump steam turbine |
| CN111706406B (en) * | 2020-06-15 | 2022-12-06 | 华能罗源发电有限责任公司 | Quick intermediate speed warm-up control system |
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| US3879616A (en) * | 1973-09-17 | 1975-04-22 | Gen Electric | Combined steam turbine and gas turbine power plant control system |
| JPS6059404B2 (en) * | 1979-12-19 | 1985-12-25 | 株式会社東芝 | Warming device for steam control valve in turbine plant |
| EP1775431A1 (en) * | 2005-10-12 | 2007-04-18 | Siemens Aktiengesellschaft | Method for warming-up a steam turbine |
| JP5221443B2 (en) * | 2009-05-08 | 2013-06-26 | 株式会社東芝 | Method for starting single-shaft combined cycle power plant and single-shaft combined cycle power plant |
| JP5734792B2 (en) * | 2011-08-30 | 2015-06-17 | 株式会社東芝 | Steam turbine plant and operation method thereof |
| CN104033196B (en) * | 2014-04-11 | 2015-05-27 | 华能上海燃机发电有限责任公司 | Method for quickly heating steam engine of gas engine combined cycle unit in cold state |
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Inventor after: Xu Zhangfu Inventor after: Deng Tongtian Inventor after: Zhong Jingliang Inventor after: Wang Wenqiang Inventor after: Wang Suobin Inventor after: Zhang Shihai Inventor after: Lan Zhongqiu Inventor after: Jiang Yancan Inventor before: Xu Zhangfu |