CN106761969B - A kind of measures conversion method of steam turbine flow - Google Patents
A kind of measures conversion method of steam turbine flow Download PDFInfo
- Publication number
- CN106761969B CN106761969B CN201611029485.2A CN201611029485A CN106761969B CN 106761969 B CN106761969 B CN 106761969B CN 201611029485 A CN201611029485 A CN 201611029485A CN 106761969 B CN106761969 B CN 106761969B
- Authority
- CN
- China
- Prior art keywords
- steam turbine
- back pressure
- pressure value
- value
- load
- 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.)
- Active
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
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/14—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to other specific conditions
Abstract
The invention particularly discloses a kind of measures conversion method of steam turbine flow, this programme has opened up the frontier of Turbine Safety operating parameter setting, employs a kind of brand-new control method and steam turbine is controlled.Step 1 is that the highest operation back pressure value and minimum operation back pressure value of steam turbine are defined, it is ensured that steam turbine is perfectly safe；Step 2 and step 3 are the technical methods set by using section, and the safe operating area of steam turbine is limited, obtains the operation area that is perfectly safe of steam turbine；Step four fundamental rules are to input the operation area that is perfectly safe of steam turbine to the control system of steam turbine so that this programme can be directly applied in the control of steam turbine, ensure that this programme is smoothly carried out.
Description
Technical field
The present invention relates to steam turbine technology field, and in particular to a kind of measures conversion method of steam turbine flow.
Background technology
China's air-cooled type steam turbine is mainly used in thermal power industry, and the power of the assembling unit is main to divide typically in more than 200MW
It is distributed in the place of water resources shortage.Air-cooled type steam turbine is different from conventional clammy formula steam turbine, has exhaust temperature height, Er Qiepai
The characteristics of stripping temperature is larger with the excursion of ambient air temperature.Because delivery temperature tc=atmospheric temperature ta+ initial temperature differences
ITD, the wherein general value of initial temperature differences ITD values are >=30 DEG C, therefore, with the change of ambient air temperature（The particularly summer in winter
The morning and evening temperature difference it is big）, exhaust temperature will fluctuation.When exhaust temperature raises, the specific volume of steam declines, the volume flow of steam discharge
Amount will be reduced, and certainly will cause a series of safety for jeopardizing unit operation such as steam turbine last stage air blast, the exhaust stage blade separation of flow, flutter
The problems such as.Therefore, it is necessary to the steam discharge parameter of steam turbine is limited.
For turbine rotor by being made up of multi-stage impeller, every grade of impeller is respectively arranged with movable vane piece, the main test of exhaust pressure height
Exhaust stage blade（Blade on steam turbine afterbody impeller）Security.At present, the steam discharge parameter limitation of air-cooled type steam turbine
Mode be：Limit the highest operation back pressure and minimum operation back pressure two values of air-cooled type steam turbine（Back pressure：I.e. steam turbine is arranged
Steam pressure）, and the highest of steam turbine operation back pressure and minimum operation back pressure can change with the change of turbine discharge amount：When
When displacement is reduced, in the case where final stage volume flow is constant, steam specific volume need to accordingly increase, and exhaust steam pressure can also drop therewith
It is low), moreover, fuel combustion value used in air-cooled type steam turbine and unstable at present, so, fuel will also result in steam turbine
Air inflow change, the cause displacement of steam turbine changes so that steam turbine just can not be for a long time according to rated load operation.
Therefore, if according to the current method of operation of conventional air-cooled type steam turbine, only by limit highest run back pressure and
Minimum operation back pressure two values are controlled to be put into steam discharge parameter to air-cooled type steam turbine, and effect is unsatisfactory, because working as
When the displacement of steam turbine is reduced, performing low-load running of machine set, highest operation back pressure and minimum operation back pressure are bigger than normal, steam turbine last stage
Overblow state or the limit beyond acting ability are early had been enter into, the safe operation of steam turbine will be jeopardized.
The content of the invention
The purpose of the present invention is in view of the shortcomings of the prior art, there is provided a kind of measures conversion method of steam turbine flow, makes vapour
Still it is capable of the operation of safety in the case of the displacement of turbine is continually changing.
To reach above-mentioned purpose, base case of the invention is：A kind of measures conversion method of steam turbine flow, including such as
Lower step：Step 1 is to set the safe operation load of steam turbine and calculate steam turbine according to the safe operation load gauge of setting
The highest operation back pressure value and minimum operation back pressure value of regulation needed for normal operation；Step 2 is according in safe operation load
Between point value and the highest operation back pressure value and minimum operation back pressure value of steam turbine is determined in each middle point value；Step 3 is
According to unit flow and load, minimum extraction flow restraining line, highest exhaust steam pressure restraining line, minimum exhaust pressure are drawn out respectively
Power（Block back pressure）Line, peak power restraining line and maximum extraction flow restraining line, at the same by each line segment be connected can form vapour
Turbine can operation area；Step 4 be using in step 3 can operation area as the safe operating area of steam turbine, with vapour
The readable form of turbine control system is inputted into the control system of steam turbine.
The operation principle and advantage of this programme are：This programme has opened up the new neck of Turbine Safety operating parameter setting
Domain, employ a kind of brand-new control method and steam turbine is controlled.Step 1 is to run back pressure value to the highest of steam turbine
It is defined with minimum operation back pressure value, it is ensured that steam turbine is perfectly safe；Step 2 and step 3 are by using section
The technical method of setting, the safe operating area of steam turbine is limited, obtain the operation area that is perfectly safe of steam turbine；Step
Rapid four fundamental rules are to input the operation area that is perfectly safe of steam turbine to the control system of steam turbine so that this programme can be applied directly
In the control of steam turbine, ensure that this programme is smoothly carried out.
This programme is different with traditional steam turbine control method, employs the steam turbine point value that Region control has broken routine
Control mode, it is ensured that the various operational factors of steam turbine can be in the operational envelope of steam turbine, be conventional steamer
What the point value control method of machine can not compare.Meanwhile using above method step, because the parameters to steam turbine（Such as
Highest operation back pressure, minimum operation back pressure, peak power and displacement etc.）Security settings control has been carried out, therefore, even if
It is because external factor, such as fire coal cause the air inflow of steam turbine to change or numerical fluctuations, in safe operating area
Interior, larger change will not occur for the overall operation performance of steam turbine, and therefore, steamer function is constantly in the shape of safe operation
State, otherwise steam turbine will autostop itself be not damaged with protecting.
Further, the safe operation load range value in step 1 is 0.2 times of rated load~1.1 times rated load.This
In the range of rated load the exhaust steam pressure of steam turbine can be made to fluctuate smaller while extraction flow measured value fall within stabilization
The scope of runtime value, more precisely effective control can be carried out to steam turbine using above range value.
Further, step 2 includes being measured the low plus extraction pressure of steam turbine, passes through low plus extraction pressure meter
Calculate the middle point value, highest operation back pressure value and minimum operation back pressure value of safe operation load.This prioritization scheme discloses
The middle point value of safe operation load is determined by the low plus extraction pressure of steam turbine, highest runs back pressure value and minimum operation
The method of back pressure value, show by applicant's experiment, it is not only very convenient by determining low plus extraction pressure, and can be very
Accurately reflect each safe operation parameter of steam turbine, improve the operational reliability of steam turbine.
Further, step 2 includes being measured the displacement of steam turbine, and safe operation is calculated by displacement
Middle point value, highest operation back pressure value and the minimum operation back pressure value of load.This prioritization scheme is disclosed by steam turbine
The method that middle point value, the highest of displacement measure safe operation load run back pressure value and minimum operation back pressure value, passes through
Applicant's experiment shows that the measure of displacement is compared to more directly, measure numerical value is very smart for low plus extraction pressure measure
Standard, therefore the extraordinary safe operating area for limiting steam turbine of energy, improve the operational reliability of steam turbine.
Brief description of the drawings
Fig. 1 is the Turbine Safety operation area figure limited by determining displacement in the embodiment of the present invention；
Fig. 2 is the Turbine Safety operation area figure limited by determining low plus extraction pressure in the embodiment of the present invention.
Embodiment
Below by embodiment, the present invention is further detailed explanation：
Embodiment is substantially as depicted in figs. 1 and 2：A kind of measures conversion method of steam turbine flow, step 1 are setting vapour
The safe operation load of turbine（0.2 times of rated load≤safe operation load≤1.1 times rated load）, calculating steam turbine just
The highest operation back pressure value and minimum operation back pressure value of often regulation needed for operation；Step 2 is to choose the centre of safe operation load
Point value and the highest operation back pressure value and minimum operation back pressure value that steam turbine is determined in each middle point value；Step 3 is root
According to unit flow and load, minimum extraction flow restraining line, highest exhaust steam pressure restraining line, minimum pressure at expulsion are drawn out respectively
（Block back pressure）Line, peak power restraining line and maximum extraction flow restraining line, at the same by each line segment be connected can form steamer
Machine can operation area；Step 4 be using in step 3 can operation area as the safe operating area of steam turbine, with steamer
The readable form of machine control system is inputted into the control system of steam turbine, and steam turbine does dock during beyond safe operating area
Reason, to ensure that Turbine Safety is reliably run.
As shown in Figure 1：When steam turbine is 0.2 times of rated load, calculating corresponding highest operation back pressure value is
12kpa（a）, it is 2.5 kpa to calculate corresponding minimum operation back pressure value（a）；When steam turbine is 1.1 times of rated loads (row
Vapour amount 120t/h) when, it is 53.5kpa to calculate corresponding highest operation back pressure value（a）, calculate corresponding minimum operation
Back pressure value is 27kpa（a）.Then choose respectively when displacement is 42.5（t/h）、50（t/h）、70（t/h）、80（t/h）、90
（t/h）、100（t/h）、107（t/h）And 113（t/h）When highest operation back pressure value and minimum operation back pressure value as special
Point value, form highest exhaust steam pressure and minimum exhaust steam pressure（Block back pressure）Corresponding point value.According to unit flow and load,
Minimum extraction flow restraining line, highest exhaust steam pressure restraining line, minimum pressure at expulsion are drawn out respectively（Block back pressure）Line, maximum
Power limit line and maximum extraction flow restraining line（As shown in Figure 1）, finally each line segment is connected can form steam turbine can
Operation area, by it is above-mentioned can operation area inputted in the form of steam turbine control system is readable into the control system of steam turbine,
Show by applicant's actual motion, steam turbine can under the scope of operation area, even if choosing different fuel, steam turbine according to
So can safely, reliably it run.
As depicted in figs. 1 and 2：For the displacement of more accurate measurement steam turbine, the flow parameter of steam turbine is turned
Turn to pressure parameter：According to the characteristics of steam turbine itself, turbine discharge amount is low with steam turbine plus extraction pressure is similar to direct ratio
Relation（According to Fl ü gel Fu Liugeer formula ≈）, converted by the numerical value of the low plus extraction pressure to measurement, and then
Corresponding displacement is calculated to reach the accurate purpose of the numerical measuring of displacement.As depicted in figs. 1 and 2, when displacement
Choosing point value is： 30（t/h）、43（t/h）、50（t/h）、70（t/h）、80（t/h）、90（t/h）、100（t/h）、107（t/
h）、113（t/h）When, corresponding calculated low plus extraction pressure value is respectively 0.0275（MPa（a））、
0.0388（MPa（a））、0.0448（MPa（a））……0.1128（MPa（a））, then now determine above-mentioned each low plus take out again
High operation back pressure value and minimum operation back pressure value under steam pressure, according to unit flow and load, draw out minimum again respectively
Extraction flow restraining line, highest exhaust steam pressure restraining line, minimum pressure at expulsion（Block back pressure）Line, peak power restraining line one-level
Maximum extraction flow restraining line（As shown in Figure 2）, finally by each line segment be connected can be formed steam turbine can operation area, will be above-mentioned
Can operation area inputted in the form of steam turbine control system is readable into the control system of steam turbine, transported by applicant is actual
Row shows, steam turbine can under the scope of operation area, even if choosing different fuel, steam turbine still can safely, can
Run by ground.
Drawn by Fig. 1 and Fig. 2, the steam turbine shown in Fig. 1 can operation area and the steam turbine shown in Fig. 2 run
Regional extent is completely overlapped, therefore, can be learnt by above-mentioned：, can be very accurate by being measured to low plus extraction pressure
The extraction flow numerical value of true measure steam turbine, and then show that vapour can be limited by the measure numerical value to low plus extraction pressure
Parameter needed for the safe operation of turbine, so as to for being controlled to steam turbine, improve the operational reliability of steam turbine.
Above-described is only embodiments of the invention, it is noted that for those skilled in the art, is not being taken off
On the premise of from present inventive concept, several modifications and improvements can also be made, these should also be considered as protection scope of the present invention,
These effects and practical applicability for implementing all without the influence present invention.This application claims protection domain should be with its right
It is required that content be defined, the record such as embodiment in specification can be used for explain claim content.
Claims (4)
- A kind of 1. measures conversion method of steam turbine flow, it is characterised in that comprise the following steps：Step 1 is to set the safe operation load of steam turbine and to calculate steam turbine according to the safe operation load gauge of setting normal The highest operation back pressure value and minimum operation back pressure value of regulation needed for operation；Step 2 is the middle point value according to safe operation load and the highest operation of steam turbine is determined in each middle point value Back pressure value and minimum operation back pressure value；Step 3 is according to unit flow and load, draws out minimum extraction flow restraining line, the limitation of highest pressure at expulsion respectively Line, minimum exhaust line pressure, peak power restraining line and maximum extraction flow restraining line, while each line segment is connected and can formed Steam turbine can operation area；Step 4 be using in step 3 can operation area as steam turbine safe operating area, can with steam turbine control system The form of reading is inputted into the control system of steam turbine.
- 2. the measures conversion method of a kind of steam turbine flow according to claim 1, it is characterised in that in the step 1 Safe operation load range value be 0.2~1.1 times of rated load.
- A kind of 3. measures conversion method of steam turbine flow according to any one of claim 1 to 2, it is characterised in that The step 2 includes being measured the low plus extraction pressure of steam turbine, and safe operation is calculated by low plus extraction pressure Middle point value, highest operation back pressure value and the minimum operation back pressure value of load.
- A kind of 4. measures conversion method of steam turbine flow according to any one of claim 1 to 2, it is characterised in that The step 2 includes being measured the capacity of steam turbine, and the intermediate point of safe operation load is calculated by capacity Value, highest operation back pressure value and minimum operation back pressure value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611029485.2A CN106761969B (en) | 2016-11-22 | 2016-11-22 | A kind of measures conversion method of steam turbine flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611029485.2A CN106761969B (en) | 2016-11-22 | 2016-11-22 | A kind of measures conversion method of steam turbine flow |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106761969A CN106761969A (en) | 2017-05-31 |
| CN106761969B true CN106761969B (en) | 2018-03-02 |
Family
ID=58970755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611029485.2A Active CN106761969B (en) | 2016-11-22 | 2016-11-22 | A kind of measures conversion method of steam turbine flow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106761969B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113356941B (en) * | 2021-06-18 | 2023-04-28 | 华能营口仙人岛热电有限责任公司 | Control method, device and medium for operation of 50MW back pressure steam turbine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006009672A (en) * | 2004-06-25 | 2006-01-12 | Hitachi Ltd | Method and apparatus for controlling private power generation plant |
| JP2007100621A (en) * | 2005-10-06 | 2007-04-19 | Chugoku Electric Power Co Inc:The | Stop control method for pressurized fluidized bed plant |
| CN103063436A (en) * | 2012-12-25 | 2013-04-24 | 河北省电力建设调整试验所 | Turbine heat consumption rate index calculation result judgment method |
| CN105157763A (en) * | 2015-09-17 | 2015-12-16 | 中国能源建设集团广东省电力设计研究院有限公司 | Measurement method and measurement system for main steam flow of gas-steam combined cycle power plant |
| CN105652832A (en) * | 2015-12-29 | 2016-06-08 | 哈尔滨工业大学 | Air cooling unit three-dimensional sliding pressure curve two-dimensional design-based DCS system and application method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9611791B2 (en) * | 2015-04-14 | 2017-04-04 | General Electric Company | Application of probabilistic control in gas turbine tuning for fuel flow-power output parameters, related control systems, computer program products and methods |
-
2016
- 2016-11-22 CN CN201611029485.2A patent/CN106761969B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006009672A (en) * | 2004-06-25 | 2006-01-12 | Hitachi Ltd | Method and apparatus for controlling private power generation plant |
| JP2007100621A (en) * | 2005-10-06 | 2007-04-19 | Chugoku Electric Power Co Inc:The | Stop control method for pressurized fluidized bed plant |
| CN103063436A (en) * | 2012-12-25 | 2013-04-24 | 河北省电力建设调整试验所 | Turbine heat consumption rate index calculation result judgment method |
| CN105157763A (en) * | 2015-09-17 | 2015-12-16 | 中国能源建设集团广东省电力设计研究院有限公司 | Measurement method and measurement system for main steam flow of gas-steam combined cycle power plant |
| CN105652832A (en) * | 2015-12-29 | 2016-06-08 | 哈尔滨工业大学 | Air cooling unit three-dimensional sliding pressure curve two-dimensional design-based DCS system and application method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106761969A (en) | 2017-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Seidel et al. | Dynamic loads in Francis runners and their impact on fatigue life | |
| US8779611B2 (en) | Method for operating a pitch-controlled wind turbine | |
| CN103850726B (en) | Method for quickly determining stationary sliding pressing optimization curve of steam turbine | |
| US20120146332A1 (en) | Method for Operating a Pitch-Controlled Wind Turbine | |
| CN101739037B (en) | Method and device for controlling radiator | |
| IN2014CH01206A (en) | ||
| CN106773666A (en) | A kind of model parameter acquisition methods for presurized water reactor primary Ioops system | |
| CN105649875B (en) | Variable pitch control method and device of wind generating set | |
| WO2019128035A1 (en) | Power control method and device for wind turbine generator system | |
| CN103279658B (en) | Thermal generator set working condition optimizing method | |
| CN104763537B (en) | Method and device for main steam temperature control at combined cycle unit starting stage | |
| CN102767529B (en) | Calculation method for energy saving effect of axial flow compressor | |
| US11920523B2 (en) | Combustion control device for gas turbine, combustion control method, and program | |
| CN107748547B (en) | Fired power generating unit depth peak regulation operating condition underload breaker trip autocontrol method | |
| US11333081B2 (en) | Rotating machine control device, rotating machine equipment, rotating machine control method, and rotating machine control program | |
| WO2020001559A1 (en) | Wind turbine control method and device, controller, and control system | |
| CN106761969B (en) | A kind of measures conversion method of steam turbine flow | |
| CN103558031B (en) | A kind of gas turbine method for load dump test | |
| CN109298245A (en) | The detection method and device of super capacitor in pitch-controlled system | |
| CN105186502A (en) | Double fed induction generator contained electric power system transient stability analysis method based on security domain | |
| JP2012500362A5 (en) | ||
| US9726085B2 (en) | Method for controlling a gas turbine group | |
| JP7461201B2 (en) | Gas turbine control device, gas turbine control method, and gas turbine control program | |
| CN109026758A (en) | It is a kind of for controlling the method and device of pumped storage unit pump operating condition start-up course | |
| US11643977B2 (en) | Gas turbine control device, gas turbine control method, and program |
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 |