CN114991893B - Front-end turbine system for deep peak shaving and operation method - Google Patents
Front-end turbine system for deep peak shaving and operation method Download PDFInfo
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- CN114991893B CN114991893B CN202210755558.5A CN202210755558A CN114991893B CN 114991893 B CN114991893 B CN 114991893B CN 202210755558 A CN202210755558 A CN 202210755558A CN 114991893 B CN114991893 B CN 114991893B
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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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
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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Abstract
The invention discloses a front-end turbine system for deep peak shaving and an operation method thereof, relates to the field of power plants, and is mainly used for solving the problem that the heat consumption rate of the power plants is obviously increased in the deep peak shaving process; the system mainly comprises a front-end turbine, a front-end turbine inlet valve, a front-end turbine outlet valve, a generator and other equipment; by arranging the front-mounted steam turbine and the generator in front of the original high-pressure cylinder, the throttling loss of the high-pressure cylinder steam inlet regulating valve in low load is reduced, the main steam pressure of the boiler outlet is improved, and the effect of high-efficiency operation of the steam turbine set in low load is realized; the invention can reduce the problem of increasing the heat consumption rate of the unit caused by the reduction of the steam inlet pressure of the high-pressure cylinder and the throttling loss of the steam inlet regulating valve of the high-pressure cylinder when the unit is in low load, and improves the peak regulation performance of the unit.
Description
Technical Field
The invention relates to the field of power plants, in particular to a front-end turbine system for deep peak shaving of a power plant.
Background
With the development of renewable energy sources, the proportion of renewable energy source power generation is also increasing continuously, and the integration of renewable energy source power generation into a power grid threatens the stability of the power grid due to the defect of unstable renewable energy sources, so that the power plant is necessary to carry out peak shaving to improve the stability of the power grid. However, in the process of deep peak shaving of the power plant, the operating condition of the power plant deviates from the design condition obviously, so that the efficiency of the unit is reduced obviously, and the economy of the unit is reduced. At low load, the current unit generally adopts a mode of reducing the pressure of main steam and simultaneously matching with the throttle of a main steam valve to reduce the load, which can lead to obvious reduction of the efficiency of a steam turbine and increase of the heat consumption rate of the unit. Therefore, how to solve the problem of significantly reduced unit efficiency at low load is an important aspect of improving unit thermal economy.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a front-end turbine system for deep peak shaving and an operation method thereof, wherein the front-end turbine is arranged in front of a high-pressure cylinder, so that the increase of heat consumption rate caused by the reduction of main steam pressure and the throttling loss of a high-pressure cylinder steam inlet regulating valve during low load of a unit is reduced, and the efficiency during low load is improved.
In order to achieve the above purpose, the present invention adopts the following technical scheme.
The front-end turbine system for deep peak regulation comprises a boiler 1, a high-pressure cylinder 2, a middle-low pressure cylinder 3, a generator I4, a generator II5, a condenser 6, a low-pressure heater group 7, a water supply pump 8, a high-pressure heater group 9, a low-pressure heater steam inlet valve 10, a high-pressure heater steam inlet valve 11, a front-end turbine 12, a front-end turbine inlet valve 13, a front-end turbine outlet valve 14, a turbine steam inlet regulating valve 15, a high-pressure heater bypass steam inlet valve 16, a low-pressure heater bypass steam inlet valve 17, a zero-number high-pressure heater steam inlet regulating valve 18, a zero-number high-pressure heater bypass valve 19, a zero-number high-pressure heater inlet valve 20 and a zero-number high-pressure heater 21;
the main steam outlet of the boiler 1 is connected with the inlet of a steam turbine steam inlet regulating valve 15, the outlet of the steam turbine steam inlet regulating valve 15 is connected with the inlet of a high-pressure cylinder 2, the outlet of the high-pressure cylinder 2 is connected with the reheat steam inlet of the boiler 1, the reheat steam outlet of the boiler 1 is connected with the inlet of a middle and low-pressure cylinder 3, the outlet of the middle and low-pressure cylinder 3 is connected with the inlet of a condenser 6, the shafts of the high-pressure cylinder 2 and the middle and low-pressure cylinder 3 are connected with a generator I4, the outlet of the condenser 6 is connected with the feed water inlet of a low-pressure heater group 7, the feed water outlet of the low-pressure heater group 7 is connected with the feed water inlet of a high-pressure heater group 9 through a zero-number high-pressure heater inlet valve 20, the steam inlet of the low-pressure heater group 7 is connected with the steam outlet of the middle and low-pressure cylinder 3 through a low-pressure heater inlet valve 10, and the steam inlet of the high-pressure heater group 9 is connected with the feed water inlet of the high-pressure heater group 2 through a high-pressure heater inlet valve 11;
the steam turbine inlet regulating valve 15 is connected with the front steam turbine 12 in parallel, the inlet and the outlet of the front steam turbine 12 are respectively provided with the front steam turbine inlet valve 13 and the front steam turbine outlet valve 14, the shaft of the front steam turbine 12 is connected with the generator II5, the steam extraction outlet of the front steam turbine 12 is respectively connected with the steam inlets of the high-pressure heater group 9, the low-pressure heater group 7 and the zero high-pressure heater 21 through the high-pressure heater bypass inlet valve 16, the low-pressure heater bypass inlet valve 17 and the zero high-pressure heater inlet regulating valve 18, the water supply inlet of the zero high-pressure heater 21 is connected with the zero high-pressure heater inlet valve 20 and is connected with the zero high-pressure heater bypass valve 19 in parallel, and the steam outlet of the zero high-pressure heater 21 is connected with the main steam inlet of the boiler 1.
The front-mounted steam turbine system for deep peak shaving is characterized in that the design steam flow of the high-pressure cylinder 2 is the main steam flow of the boiler 1 in the rated working condition, the design pressure is the main steam pressure of the boiler 1 in the rated working condition, and the design temperature is the main steam pressure of the boiler 1 in the rated working condition; the design steam flow of the front-end turbine 12 is 50% of the main steam flow of the boiler 1 in the rated working condition, the design pressure is the main steam pressure of the boiler 1 in the rated working condition, and the design temperature is the main steam pressure of the boiler 1 in the rated working condition.
When the unit load is higher than 90%, opening the inlet valve 13 and the outlet valve 14 of the front turbine to enable steam to enter the front turbine 12, and controlling the unit load by adjusting the inlet valve 15 of the turbine; when the unit load is 50% -90%, starting a generator II5, controlling the outlet steam pressure of the front turbine 12 to be the set pressure of the high pressure cylinder 2 in different loads by adjusting the inlet valve 13 of the front turbine, and controlling the unit load by adjusting the inlet steam adjusting valve 15 of the turbine; when the unit load is lower than 50%, the turbine inlet regulating valve 15 is closed, and the unit load is controlled by adjusting the front turbine inlet valve 13.
The operation method of the front-end turbine system for deep peak shaving is characterized in that if the unit load is 70-90%, a low-pressure heater bypass steam inlet valve 17 is opened, a high-pressure heater bypass steam inlet valve 16 and a zero-number high-pressure heater steam inlet regulating valve 18 are closed, and the steam flow entering the low-pressure heater unit 7 is controlled by regulating the low-pressure heater bypass steam inlet valve 17; if the unit load is 50-70%, opening the high-pressure heater bypass steam inlet valve 16, closing the low-pressure heater bypass steam inlet valve 17 and the zero-number high-pressure heater steam inlet regulating valve 18, and controlling the steam flow entering the high-pressure heater unit 9 by regulating the high-pressure heater bypass steam inlet valve 16; if the unit load is lower than 50%, opening the zero high-pressure heater steam inlet regulating valve 18 and the zero high-pressure heater inlet valve 20, closing the zero high-pressure heater bypass valve 19, the high-pressure heater bypass steam inlet valve 16 and the low-pressure heater bypass steam inlet valve 17, and controlling the outlet temperature of the zero high-pressure heater 21 by adjusting the zero high-pressure heater steam inlet regulating valve 18.
Preferably, after the zero high-pressure heater 21 is started, the outlet temperature of the zero high-pressure heater 21 is controlled to be 280-300 ℃.
Preferably, after the zero high pressure heater 21 is activated, if the outlet steam pressure of the front turbine 12 is too high, the high pressure heater bypass inlet valve 16 is opened and the steam pressure entering the high pressure heater group 9 is controlled by adjusting the high pressure heater bypass inlet valve 16.
Compared with the prior art, the technology has the advantages that:
(1) When the peak is deeply regulated, a front-mounted steam turbine is used for replacing a steam turbine inlet regulating valve, so that the throttling loss of the regulating valve is reduced, and the efficiency of the unit is obviously improved at low load;
(2) When the peak is deeply regulated, the zero-number high-pressure heater is started, and the steam is supplied by utilizing the steam extraction of the front-end steam turbine, so that the efficiency of the unit is further improved while the water supply temperature is ensured;
(3) The steam inlet pressure of the high-pressure cylinder can be adjusted by adjusting the steam extraction flow of the front-mounted steam turbine, so that the operation range of the high-pressure cylinder is widened, the lowest operation load of the unit is further reduced, and the flexibility of the unit is improved.
Drawings
FIG. 1 is a system diagram of the present invention;
the boiler comprises a boiler, a high-pressure cylinder, a middle-low pressure cylinder, a low-pressure cylinder, a generator I, a generator II, a high-pressure heater, a condenser, a low-pressure heater, a water supply pump, a high-pressure heater, a low-pressure heater inlet valve, a high-pressure heater inlet valve, a front turbine inlet valve, a front turbine outlet valve, a front turbine inlet regulating valve, a steam turbine inlet regulating valve, a high-pressure heater bypass inlet valve, a low-pressure heater bypass inlet valve, a zero-pressure heater inlet regulating valve, a zero-pressure heater bypass valve, a zero-pressure high-pressure heater inlet valve and a zero-pressure heater.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, the front-end turbine system for deep peak shaving according to the present invention comprises a boiler 1, a high-pressure cylinder 2, a middle-low pressure cylinder 3, a generator I4, a generator II5, a condenser 6, a low-pressure heater group 7, a feed pump 8, a high-pressure heater group 9, a low-pressure heater inlet valve 10, a high-pressure heater inlet valve 11, a front-end turbine 12, a front-end turbine inlet valve 13, a front-end turbine outlet valve 14, a turbine inlet regulating valve 15, a high-pressure heater bypass inlet valve 16, a low-pressure heater bypass inlet valve 17, a zero-number high-pressure heater inlet regulating valve 18, a zero-number high-pressure heater bypass valve 19, a zero-number high-pressure heater inlet valve 20 and a zero-number high-pressure heater 21;
the main steam outlet of the boiler 1 is connected with the inlet of a steam turbine steam inlet regulating valve 15, the outlet of the steam turbine steam inlet regulating valve 15 is connected with the inlet of a high-pressure cylinder 2, the outlet of the high-pressure cylinder 2 is connected with the reheat steam inlet of the boiler 1, the reheat steam outlet of the boiler 1 is connected with the inlet of a middle and low-pressure cylinder 3, the outlet of the middle and low-pressure cylinder 3 is connected with the inlet of a condenser 6, the shafts of the high-pressure cylinder 2 and the middle and low-pressure cylinder 3 are connected with a generator I4, the outlet of the condenser 6 is connected with the feed water inlet of a low-pressure heater group 7, the feed water outlet of the low-pressure heater group 7 is connected with the feed water inlet of a high-pressure heater group 9 through a zero-number high-pressure heater inlet valve 20, the steam inlet of the low-pressure heater group 7 is connected with the steam outlet of the middle and low-pressure cylinder 3 through a low-pressure heater inlet valve 10, and the steam inlet of the high-pressure heater group 9 is connected with the feed water inlet of the high-pressure heater group 2 through a high-pressure heater inlet valve 11;
the steam turbine admission regulating valve 15 is connected with the front steam turbine 12 in parallel, an inlet and an outlet of the front steam turbine 12 are respectively provided with the front steam turbine inlet valve 13 and the front steam turbine outlet valve 14, a shaft of the front steam turbine 12 is connected with the generator II5, meanwhile, a steam extraction outlet of the front steam turbine 12 is respectively connected with a high-pressure heater group 9, a low-pressure heater group 7 and a steam inlet of a zero-number high-pressure heater 21 through a high-pressure heater bypass steam inlet valve 16, a low-pressure heater bypass steam inlet valve 17 and a zero-number high-pressure heater admission regulating valve 18, a water supply inlet of the zero-number high-pressure heater 21 is connected with a zero-number high-pressure heater inlet valve 20 and is connected with a zero-number high-pressure heater bypass valve 19 in parallel, and a steam outlet of the zero-number high-pressure heater 21 is connected with a main steam inlet of the boiler 1.
Preferably, the design steam flow of the high-pressure cylinder 2 is the main steam flow of the boiler 1 in the rated working condition, the design pressure is the main steam pressure of the boiler 1 in the rated working condition, and the design temperature is the main steam pressure of the boiler 1 in the rated working condition; the design steam flow of the front-end turbine 12 is 50% of the main steam flow of the boiler 1 in the rated working condition, the design pressure is the main steam pressure of the boiler 1 in the rated working condition, and the design temperature is the main steam pressure of the boiler 1 in the rated working condition.
In the operation method of the front-end turbine system for deep peak shaving, when the unit load is higher than 90%, the front-end turbine 12 is not required to do work to generate electricity at the moment, but in order to reduce the preheating time and energy consumption in the starting process of the front-end turbine 12, the front-end turbine 12 needs to be maintained to operate at the minimum steam flow, so that the front-end turbine inlet valve 13 and the front-end turbine outlet valve 14 need to be opened to enable a small amount of steam to enter the front-end turbine 12, and the unit load is controlled through the turbine inlet steam regulating valve 15; when the unit load is 70-90%, in order to reduce the outlet steam flow of the boiler 1 and maintain the outlet steam pressure of the boiler 1, the front-end turbine 12 should participate in the load adjustment process of the unit, at this time, the generator II5 is started, the outlet steam pressure of the front-end turbine 12 is controlled to be the set pressure of the high-pressure cylinder 2 at different loads by adjusting the inlet valve 13 of the front-end turbine, and the unit load is controlled by adjusting the steam turbine inlet regulating valve 15, because the steam flow of the front-end turbine 12 is less, the extraction pressure of the front-end turbine 12 is not high, so that the bypass inlet valve 17 of the low-pressure heater can be started, and part of extraction steam of the low-pressure heater group 7 is replaced by the extraction steam of the front-end turbine 12, so that the efficiency of the unit is improved; when the load of the unit is 50-70%, the steam flow entering the front-end turbine 12 is gradually increased, and the steam flow passing through the turbine steam inlet regulating valve 15 is continuously reduced, and the steam extraction pressure of the front-end turbine 12 is continuously increased, so that the low-pressure heater bypass steam inlet valve 17 can be closed, the high-pressure heater bypass steam inlet valve 16 is opened, and the steam extraction of the front-end turbine 12 is used for replacing part of the steam extraction of the high-pressure heater unit 9, thereby improving the efficiency of the unit; when the unit load is lower than 50%, the steam turbine inlet steam regulating valve 15 can be closed because the flow of the outlet steam of the boiler 1 is obviously reduced, so that steam generated by the boiler 1 fully enters the front-end steam turbine 12, the unit load is controlled by regulating the inlet valve 13 of the front-end steam turbine, the extraction pressure of the high-pressure cylinder 2 is obviously reduced because the steam flow entering the high-pressure cylinder 2 is also continuously reduced, the outlet water supply temperature of the high-pressure heater group 9 is reduced, in order to improve the water supply temperature entering the boiler 1, the zero-pressure heater inlet steam regulating valve 18, the zero-pressure heater inlet valve 20 and the zero-pressure heater 21 can be opened, the high-pressure heater bypass steam inlet valve 16 and the zero-pressure heater bypass valve 19 are closed, the water supply of the zero-pressure high-pressure heater 21 is heated by utilizing the extraction steam of the front-end steam turbine 12, the outlet water supply temperature of the zero-pressure heater 21 is maintained to be 280-300 ℃, and if the outlet steam pressure of the front-end steam turbine 12 is too high, the zero-pressure heater bypass steam turbine is opened, the high-pressure heater bypass steam heater inlet valve 16 can be heated by utilizing the extraction steam turbine 12 after the front-end steam turbine 12 is partially heated by the high-pressure heater inlet steam turbine inlet steam valve 16, and the high-pressure heater inlet steam turbine is heated by the high-pressure heater bypass valve 16.
By using the system and the method, the throttling loss of the high-pressure cylinder steam inlet regulating valve during low load can be reduced, the main steam pressure of a boiler outlet is improved, and the effect of high-efficiency operation of the steam turbine unit during low load is realized; the invention can reduce the problem of increasing the heat consumption rate of the unit caused by the reduction of the steam inlet pressure of the high-pressure cylinder and the throttling loss of the steam inlet regulating valve of the high-pressure cylinder when the unit is in low load, and improves the peak regulation performance of the unit.
Claims (4)
1. The operation method of the front-end turbine system for deep peak shaving is characterized in that the front-end turbine system for deep peak shaving comprises a boiler (1), a high-pressure cylinder (2), a middle-low pressure cylinder (3), a generator I (4), a generator II (5), a condenser (6), a low-pressure heater group (7), a feed water pump (8), a high-pressure heater group (9), a low-pressure heater steam inlet valve (10), a high-pressure heater steam inlet valve (11), a front-end turbine (12), a front-end turbine inlet valve (13), a front-end turbine outlet valve (14), a turbine steam inlet regulating valve (15), a high-pressure heater bypass steam inlet valve (16), a low-pressure heater bypass steam inlet valve (17), a zero-number high-pressure heater steam inlet regulating valve (18), a zero-number high-pressure heater bypass valve (19), a zero-number high-pressure heater inlet valve (20) and a zero-number high-pressure heater (21);
the main steam outlet of the boiler (1) is connected with the inlet of a steam turbine steam inlet regulating valve (15), the outlet of the steam turbine steam inlet regulating valve (15) is connected with the inlet of a high-pressure cylinder (2), the outlet of the high-pressure cylinder (2) is connected with the reheat steam inlet of the boiler (1), the reheat steam outlet of the boiler (1) is connected with the inlet of a medium-low pressure cylinder (3), the outlet of the medium-low pressure cylinder (3) is connected with the inlet of a condenser (6), the shafts of the high-pressure cylinder (2) and the medium-low pressure cylinder (3) are connected with a generator I (4), the outlet of the condenser (6) is connected with the feed water inlet of a low-pressure heater group (7), the feed water outlet of the low-pressure heater group (7) is connected with the feed water inlet of the high-pressure heater group (9) through a zero-number high-pressure heater inlet valve (20), the feed water outlet of the high-pressure heater group (9) is connected with the feed water inlet of the zero-number high-pressure heater (21) through a zero-number high-pressure heater inlet valve (20), and the steam outlet of the low-pressure heater group (7) is connected with the high-pressure steam inlet of the high-pressure heater group (2) through the low-pressure heater inlet valve (11);
the steam turbine inlet regulating valve (15) is connected with the front-mounted steam turbine (12) in parallel, an inlet and an outlet of the front-mounted steam turbine (12) are respectively provided with a front-mounted steam turbine inlet valve (13) and a front-mounted steam turbine outlet valve (14), a shaft of the front-mounted steam turbine (12) is connected with the generator II (5), a steam extraction outlet of the front-mounted steam turbine (12) is connected with a main steam inlet of the boiler (1) through a high-pressure heater bypass inlet valve (16), a low-pressure heater bypass inlet valve (17) and a zero-number high-pressure heater inlet regulating valve (18) respectively, the steam inlets of the high-pressure heater group (9), the low-pressure heater group (7) and the zero-number high-pressure heater (21) are connected with a water supply inlet of the zero-number high-pressure heater (21) and a zero-number high-pressure heater bypass valve (19) in parallel, and the steam outlet of the zero-number high-pressure heater (21) is connected with a main steam inlet of the boiler (1);
when the unit load is higher than 90%, opening an inlet valve (13) and an outlet valve (14) of the front turbine to enable steam to enter the front turbine (12), and controlling the unit load by adjusting an inlet steam adjusting valve (15) of the turbine; when the unit load is 50% -90%, starting a generator II (5), controlling the outlet steam pressure of the front turbine (12) to be the set pressure of the high-pressure cylinder (2) at different loads by adjusting the inlet valve (13) of the front turbine, and controlling the unit load by adjusting the inlet steam adjusting valve (15) of the turbine; when the unit load is lower than 50%, closing a steam turbine inlet regulating valve (15), and controlling the unit load by adjusting a front steam turbine inlet valve (13);
if the unit load is 70-90%, opening a low-pressure heater bypass steam inlet valve (17), closing a high-pressure heater bypass steam inlet valve (16) and a zero-number high-pressure heater steam inlet regulating valve (18), and controlling steam flow entering the low-pressure heater unit (7) by regulating the low-pressure heater bypass steam inlet valve (17); if the unit load is 50-70%, opening a high-pressure heater bypass steam inlet valve (16), closing a low-pressure heater bypass steam inlet valve (17) and a zero-number high-pressure heater steam inlet regulating valve (18), and controlling steam flow entering the high-pressure heater unit (9) by regulating the high-pressure heater bypass steam inlet valve (16); and if the unit load is lower than 50%, opening a zero high-pressure heater steam inlet regulating valve (18) and a zero high-pressure heater inlet valve (20), closing a zero high-pressure heater bypass valve (19), a high-pressure heater bypass steam inlet valve (16) and a low-pressure heater bypass steam inlet valve (17), and controlling the outlet temperature of the zero high-pressure heater (21) by regulating the zero high-pressure heater steam inlet regulating valve (18).
2. The method for operating a front-end steam turbine system for deep peaking according to claim 1, characterized in that the design steam flow of the high pressure cylinder (2) is the main steam flow of the boiler (1) at the rated operating condition, the design pressure is the main steam pressure of the boiler (1) at the rated operating condition, and the design temperature is the main steam pressure of the boiler (1) at the rated operating condition; the design steam flow of the front-mounted steam turbine (12) is 50% of the main steam flow of the boiler (1) under the rated working condition, the design pressure is the main steam pressure of the boiler (1) under the rated working condition, and the design temperature is the main steam pressure of the boiler (1) under the rated working condition.
3. The method for operating a steam turbine system according to claim 1, wherein after the zero high pressure heater (21) is started, the outlet temperature of the zero high pressure heater (21) is controlled to 280-300 ℃.
4. Method for operating a pre-turbine system for deep peaking according to claim 1, characterized in that after starting the zero high pressure heater (21), if the outlet steam pressure of the pre-turbine (12) is too high, the high pressure heater bypass steam inlet valve (16) is opened and the steam pressure into the high pressure heater group (9) is controlled by adjusting the high pressure heater bypass steam inlet valve (16).
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| RU2503827C2 (en) * | 2012-03-20 | 2014-01-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Саратовский государственный технический университет имени Гагарина Ю.А." (СГТУ имени Гагарина Ю.А.) | Method of operation of heating steam-turbine plant and device for its realisation |
| US9617874B2 (en) * | 2013-06-17 | 2017-04-11 | General Electric Technology Gmbh | Steam power plant turbine and control method for operating at low load |
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| CN107830510A (en) * | 2017-11-17 | 2018-03-23 | 程晋瑞 | A kind of wide load of new vapour source of fired power generating unit high-pressure heater carries effect and out of stock technological system and matching process |
| CN114233416B (en) * | 2021-12-07 | 2022-09-23 | 暨南大学 | Dynamically-reconstructed steam turbine generator unit and operation method |
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