CN215595790U - Wind power photovoltaic power generation auxiliary coal-fired unit flexible operation system - Google Patents
Wind power photovoltaic power generation auxiliary coal-fired unit flexible operation system Download PDFInfo
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- CN215595790U CN215595790U CN202122037170.5U CN202122037170U CN215595790U CN 215595790 U CN215595790 U CN 215595790U CN 202122037170 U CN202122037170 U CN 202122037170U CN 215595790 U CN215595790 U CN 215595790U
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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
- Y02E10/00—Energy generation through renewable energy sources
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- Y02E10/72—Wind turbines with rotation axis in wind direction
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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Abstract
The utility model discloses a flexible operation system of a wind power photovoltaic power generation auxiliary coal-fired unit, which comprises a boiler, a steam turbine, a generator, a power grid, a wind power/photovoltaic power generation unit, a condenser, a water feeding pump, a water feeding regenerative heater, a first electric switch, a second electric switch, a third electric switch, an electric heater, a low-temperature molten salt pump, a high-temperature storage tank, a low-temperature storage tank, a molten salt water feeding heater and a high-temperature molten salt pump. The system utilizes the electric heat storage method to reduce the grid-entering electric quantity of the coal-fired unit, provides a grid-entering space for wind power/photovoltaic power generation, and can also use the wind power/photovoltaic power generation in unstable operation for heating a heat storage medium, thereby realizing the consumption of 'wind abandoning and light abandoning electric quantity'; during the peak period of power utilization, the heat stored in the heat storage device is released to the original unit thermodynamic system to heat the feed water, meanwhile, the interstage steam extraction of the regenerative heater is reduced, the steam through flow in the steam turbine is increased, the unit is quickly loaded, and the flexibility of the operation of the coal-fired unit is improved.
Description
Technical Field
The utility model relates to a flexible operation system of a coal-fired unit, in particular to a flexible operation system of a wind power photovoltaic power generation auxiliary coal-fired unit, which can eliminate wind and light abandonment.
Background
3060, the development of renewable energy is improved unprecedentedly, and the development of renewable energy is energetically trended. However, there are two problems in the utilization of renewable energy sources: firstly, the intermittency and randomness of renewable energy sources affect the operation safety of a power grid; secondly, large-scale renewable energy sources enter a power grid, and the power generation load of the traditional coal-fired unit needs to be reduced. The problem of how to realize the consumption of unstable renewable energy and the promotion of large-scale renewable network access needs to be solved urgently.
The utility model provides a flexible operation system of a wind power photovoltaic power generation auxiliary coal-fired unit. Reducing the network-entering electric quantity of the coal-fired unit by utilizing an electric heat storage method, and providing a network-entering space for wind power generation; the wind power/photovoltaic power generation heating heat storage medium in unstable operation is utilized to absorb 'wind and light abandoning electric quantity'; the stored heat is released to the original unit thermodynamic system to heat the water supply in the peak period of power utilization, the steam extraction of the regenerative heater is reduced, the steam through flow in the steam turbine is increased, and the load of the unit is quickly increased. The method realizes the flexible operation of the wind power/photovoltaic power generation auxiliary coal-fired unit.
Disclosure of Invention
The utility model aims to provide a transformation scheme for assisting flexible operation of a coal-fired unit in wind power/photovoltaic power generation, which utilizes an electric heat storage technology to reduce the network-entering electric quantity of the coal-fired unit, provides a network-entering space for the wind power/photovoltaic power generation, and can use the wind power/photovoltaic power generation in unstable operation for heating a heat storage medium to realize the consumption of 'wind abandoning/light abandoning electric quantity'; during the peak period of power utilization, the heat stored in the heat storage device is released to the original unit thermodynamic system to heat the water supply, meanwhile, the interstage steam extraction of the regenerative heater is reduced, the steam through flow in the steam turbine is increased, the unit is quickly loaded, and the flexibility of the operation of the wind power/photovoltaic power generation auxiliary coal-fired unit is improved.
The technical solution of the utility model is as follows:
the utility model provides a supplementary coal fired unit flexibility operating system of wind-force photovoltaic power generation which characterized in that: the system comprises a boiler 1, a steam turbine 2, a generator 3, a power grid 4, a wind power/photovoltaic generator set 5, a condenser 6, a water feeding pump 7, a water feeding regenerative heater 8, a first electric switch 9, a second electric switch 10, a third electric switch 11, an electric heater 12, a low-temperature molten salt pump 13, a high-temperature storage tank 14, a low-temperature storage tank 15, a molten salt water feeding heater 16 and a high-temperature molten salt pump 17.
The steam outlet of the boiler 1 is sequentially connected with the steam turbine 2, the condenser 6, the water pump 7, the feed water regenerative heater 8 and the water side inlet of the boiler 1; the 2-stage steam extraction of the steam turbine is connected with the steam side of the regenerative feedwater heater 8, and the steam side of the regenerative feedwater heater 8 is connected with the inlet of the condenser 6; the steam turbine 2 is connected with the generator 3 through a shaft;
the outlet of the feed pump 7 is also connected with the water side inlet of the molten salt feed water heater 16, and the water side outlet of the molten salt feed water heater 16 is connected with the water side inlet of the boiler 1;
the generator 3 is connected to the power grid 4 and the third electric switch 11, respectively, and the third electric switch 11 is connected to the electric heater 12.
The wind power/photovoltaic generator set 5 is respectively connected with the first electric switch 9 and the second electric switch 10, the first electric switch 9 is connected with the power grid 4, and the second electric switch 10 is connected with the electric heater 12.
The outlet of the low-temperature storage tank 15 is sequentially connected with the low-temperature molten salt pump 13, the electric heater 12 and the high-temperature storage tank 14; the outlet of the high-temperature storage tank 14 is sequentially connected with the high-temperature molten salt pump 17, the molten salt feed water heater 16 and the low-temperature storage tank 15.
The heat storage medium selected in the high-temperature storage tank 14 and the low-temperature heat storage tank 15 can be molten salt or heat conducting oil, and the working temperature range is 100-350 ℃.
The wind power/photovoltaic generator set 5 is arranged in a plurality of sets.
The flexible operation system of the wind power photovoltaic power generation auxiliary coal-fired unit comprises the following use methods:
the steam outlet of the boiler 1 is sequentially connected with the steam turbine 2, the condenser 6, the water pump 7, the feed water regenerative heater 8 and the water side inlet of the boiler 1; the 2-stage steam extraction of the steam turbine is connected with the steam side of the regenerative feedwater heater 8, and the steam side of the regenerative feedwater heater 8 is connected with the inlet of the condenser 6; the steam turbine 2 is connected with the generator 3 through a shaft; the generator 3 is connected with the power grid 4; the power generation system of the traditional coal-fired unit is formed;
the steam outlet of the boiler 1 is sequentially connected with the steam turbine 2, the condenser 6, the water pump 7, the feed water regenerative heater 8 and the water side inlet of the boiler 1; the 2-stage steam extraction of the steam turbine is connected with the steam side of the regenerative feedwater heater 8, and the steam side of the regenerative feedwater heater 8 is connected with the inlet of the condenser 6; the steam turbine 2 is connected with the generator 3 through a shaft; the generator 3 is respectively connected with the power grid 4 and the third electric switch 11, and the third electric switch 11 is connected with the electric heater 12; the outlet of the low-temperature storage tank 15 is sequentially connected with the low-temperature molten salt pump 13, the electric heater 12 and the high-temperature storage tank 14; the deep peak shaving system of the traditional coal-fired unit is formed.
The wind power/photovoltaic generator set 5 is connected with the first electric switch 9, the first electric switch 9 is connected with the power grid 4, and a wind power/photovoltaic power generation system is formed;
the wind power/photovoltaic generator set 5 is connected with the second electric switch 10, and the second electric switch 10 is connected with the electric heater 12; the outlet of the low-temperature storage tank 15 is sequentially connected with the low-temperature molten salt pump 13, the electric heater 12 and the high-temperature storage tank 14; the wind abandoning/light abandoning absorption system is formed;
the steam outlet of the boiler 1 is sequentially connected with the steam turbine 2, the condenser 6, the water pump 7, the molten salt feed water heater 16 and the water side inlet of the boiler 1; the steam turbine 2 is connected with the generator 3 through a shaft; the generator 3 is connected with the power grid 4; the outlet of the high-temperature storage tank 14 is sequentially connected with the high-temperature molten salt pump 17, the molten salt feed water heater 16 and the low-temperature storage tank 15; the coal-fired unit rapid load-increasing system is formed;
when the coal-fired unit normally operates, the power generation system of the traditional coal-fired unit works;
when the load of the coal-fired unit is reduced and the peak load is regulated, the third electric switch 11 is closed, a power generation system of the traditional coal-fired unit and a deep peak load regulation system of the traditional coal-fired unit work, and the generator generates redundant electric quantity to heat the molten salt in the low-temperature storage tank 15;
when the wind speed or the illumination intensity meets the network access requirement of a wind power/photovoltaic power generation system, the traditional coal-fired unit power generation system and the wind power/photovoltaic power generation system work;
when the wind speed or the illumination intensity cannot meet the grid-entering requirement of the wind power/photovoltaic power generation system and the generated garbage electricity cannot enter the power grid, the first electric switch 9 is switched off, the second electric switch 10 is switched on, the traditional coal-fired unit power generation system and the wind and light abandoning absorption system work, and the garbage electricity is used for heating the molten salt in the low-temperature storage tank 15;
when the coal-fired unit is rapidly loaded, the rapid loading system of the coal-fired unit works, feed water is heated by the molten salt feed water heater 16, interstage steam extraction of the steam turbine 2 is cut off, the feed water regenerative heater 8 does not work, the through flow of steam in the steam turbine 2 is increased, and the load of the unit is rapidly increased.
The utility model has the beneficial effects that:
the electric quantity of the coal-fired unit entering the network is reduced by utilizing the electric heat storage technology, the network entering space is provided for wind power/photovoltaic power generation, and the wind power/photovoltaic power generation in unstable operation can be used for heating a heat storage medium, so that the consumption of 'wind abandoning/light abandoning electric quantity' is realized; during the peak period of power utilization, the heat stored in the heat storage device is released to the original unit thermodynamic system to heat the feed water, meanwhile, the interstage steam extraction of the regenerative heater is reduced, the steam through flow in the steam turbine is increased, the unit is quickly loaded, and the flexibility of the operation of the coal-fired unit is improved.
Drawings
FIG. 1 is a schematic flow diagram of a flexible operation system of a wind power photovoltaic power generation auxiliary coal-fired unit provided by the utility model;
FIG. 2 is a flow chart of a conventional coal-fired unit power generation system and a wind/photovoltaic power generation system provided by the present invention;
FIG. 3 is a flow chart of a deep peak shaving system of a conventional coal-fired unit according to the present invention;
FIG. 4 is a flow chart of a wind curtailment/light curtailment absorption system provided by the present invention;
FIG. 5 is a flow chart of a rapid load-increasing system of a coal-fired unit provided by the utility model.
Main original notation
The system comprises a boiler 1, a steam turbine 2, a generator 3, a power grid 4, a wind power/photovoltaic generator set 5, a condenser 6, a water feeding pump 7, a water feeding regenerative heater 8, a first electric switch 9, a second electric switch 10, a third electric switch 11, an electric heater 12, a low-temperature molten salt pump 13, a high-temperature storage tank 14, a low-temperature storage tank 15, a molten salt water feeding heater 16 and a high-temperature molten salt pump 17.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
Referring to fig. 1, a flow diagram of a flexible operation system of a wind power photovoltaic power generation auxiliary coal-fired unit according to the present invention is shown.
The system comprises a boiler 1, a steam turbine 2, a generator 3, a power grid 4, a wind power/photovoltaic generator set 5, a condenser 6, a water feeding pump 7, a water feeding regenerative heater 8, a first electric switch 9, a second electric switch 10, a third electric switch 11, an electric heater 12, a low-temperature molten salt pump 13, a high-temperature storage tank 14, a low-temperature storage tank 15, a molten salt water feeding heater 16 and a high-temperature molten salt pump 17.
A steam outlet of the boiler 1 is sequentially connected with a steam turbine 2, a condenser 6, a water pump 7, a feed water regenerative heater 8 and a water side inlet of the boiler 1; the interstage steam extraction of the steam turbine 2 is connected with the steam side of a regenerative water supply heater 8, and the steam side of the regenerative water supply heater 8 is connected with the inlet of a condenser 6; the steam turbine 2 is connected with a generator 3 through a shaft;
the outlet of the feed pump 7 is also connected with the water side inlet of the molten salt feed water heater 16, and the water side outlet of the molten salt feed water heater 16 is connected with the water side inlet of the boiler 1;
the generator 3 is connected to the grid 4 and to a third electric switch 11, respectively, the third electric switch 11 being connected to an electric heater 12.
The wind power/photovoltaic generator set 5 is respectively connected with a first electric switch 9 and a second electric switch 10, the first electric switch 9 is connected with the power grid 4, and the second electric switch 10 is connected with the electric heater 12.
The outlet of the low-temperature storage tank 15 is sequentially connected with a low-temperature molten salt pump 13, an electric heater 12 and a high-temperature storage tank 14; the outlet of the high-temperature storage tank 14 is connected with a high-temperature molten salt pump 17, a molten salt feed water heater 16 and a low-temperature storage tank 15 in sequence.
The heat storage medium selected in the high-temperature storage tank 14 and the low-temperature heat storage tank 15 can be molten salt or heat conducting oil.
The wind power/photovoltaic generator set 5 is arranged in a plurality of sets.
As shown in fig. 2, a flow chart of a conventional coal-fired unit power generation system and a wind/photovoltaic power generation system;
the steam outlet of the boiler 1 is sequentially connected with the steam turbine 2, the condenser 6, the water pump 7, the feed water regenerative heater 8 and the water side inlet of the boiler 1; the 2-stage steam extraction of the steam turbine is connected with the steam side of the regenerative feedwater heater 8, and the steam side of the regenerative feedwater heater 8 is connected with the inlet of the condenser 6; the steam turbine 2 is connected with the generator 3 through a shaft; the generator 3 is connected with the power grid 4; the wind power/photovoltaic generator set 5 is connected with the first electric switch 9, and the first electric switch 9 is connected with the power grid 4; the first electric switch 9 is closed;
as shown in fig. 3, a flow chart of a deep peak shaving system of a traditional coal-fired unit;
the steam outlet of the boiler 1 is sequentially connected with the steam turbine 2, the condenser 6, the water pump 7, the feed water regenerative heater 8 and the water side inlet of the boiler 1; the 2-stage steam extraction of the steam turbine is connected with the steam side of the regenerative feedwater heater 8, and the steam side of the regenerative feedwater heater 8 is connected with the inlet of the condenser 6; the steam turbine 2 is connected with the generator 3 through a shaft; the generator 3 is respectively connected with the power grid 4 and the third electric switch 11, and the third electric switch 11 is connected with the electric heater 12; the outlet of the low-temperature storage tank 15 is sequentially connected with the low-temperature molten salt pump 13, the electric heater 12 and the high-temperature storage tank 14; the third electric switch 11 is closed;
as shown in fig. 4, a wind curtailment/light curtailment absorption system flow diagram;
the wind power/photovoltaic generator set 5 is connected with the second electric switch 10, and the second electric switch 10 is connected with the electric heater 12; the outlet of the low-temperature storage tank 15 is sequentially connected with the low-temperature molten salt pump 13, the electric heater 12 and the high-temperature storage tank 14; the second electrical switch 10 is closed;
as shown in fig. 5, a flow chart of a rapid load-up system of a coal-fired unit;
the steam outlet of the boiler 1 is sequentially connected with the steam turbine 2, the condenser 6, the water pump 7, the molten salt feed water heater 16 and the water side inlet of the boiler 1; the steam turbine 2 is connected with the generator 3 through a shaft; the generator 3 is connected with the power grid 4; the outlet of the high-temperature storage tank 14 is sequentially connected with the high-temperature molten salt pump 17, the molten salt feed water heater 16 and the low-temperature storage tank 15;
the above embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and various changes may be made in the above embodiments of the present invention. All the simple and equivalent changes and modifications made according to the claims and the content of the specification of the present application belong to the protection scope of the claims of the present patent application. The utility model has not been described in detail in order to avoid obscuring the utility model.
Claims (2)
1. The utility model provides a supplementary coal fired unit flexibility operating system of wind-force photovoltaic power generation which characterized in that: the system comprises a boiler (1), a steam turbine (2), a generator (3), a power grid (4), a wind power/photovoltaic generator set (5), a condenser (6), a water feeding pump (7), a water feeding regenerative heater (8), a first electric switch (9), a second electric switch (10), a third electric switch (11), an electric heater (12), a low-temperature molten salt pump (13), a high-temperature storage tank (14), a low-temperature storage tank (15), a molten salt water feeding heater (16) and a high-temperature molten salt pump (17);
the steam outlet of the boiler (1) is sequentially connected with the steam turbine (2), the condenser (6), the feed pump (7), the feed water regenerative heater (8) and the water side inlet of the boiler (1); the interstage steam extraction of the steam turbine (2) is connected with the steam side of the regenerative feedwater heater (8), and the steam side of the regenerative feedwater heater (8) is connected with the inlet of the condenser (6); the steam turbine (2) is connected with the generator (3) through a shaft;
the outlet of the feed pump (7) is connected with the water side inlet of the molten salt feed water heater (16), and the water side outlet of the molten salt feed water heater (16) is connected with the water side inlet of the boiler (1);
the generator (3) is respectively connected with the power grid (4) and the third electric switch (11), and the third electric switch (11) is connected with the electric heater (12);
the wind power/photovoltaic generator set (5) is respectively connected with the first electric switch (9) and the second electric switch (10), the first electric switch (9) is connected with the power grid (4), and the second electric switch (10) is connected with the electric heater (12);
the outlet of the low-temperature storage tank (15) is sequentially connected with the low-temperature molten salt pump (13), the electric heater (12) and the high-temperature storage tank (14); the outlet of the high-temperature storage tank (14) is sequentially connected with the high-temperature molten salt pump (17), the molten salt feed water heater (16) and the low-temperature storage tank (15); the wind power/photovoltaic generator set (5) is arranged in a plurality of sets.
2. The flexible operation system of the wind power photovoltaic power generation auxiliary coal-fired unit according to claim 1, characterized in that: the heat storage media selected from the high-temperature storage tank (14) and the low-temperature heat storage tank (15) are molten salt or heat conduction oil.
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| CN202122037170.5U CN215595790U (en) | 2021-08-27 | 2021-08-27 | Wind power photovoltaic power generation auxiliary coal-fired unit flexible operation system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863997A (en) * | 2021-08-27 | 2021-12-31 | 北京工业大学 | Wind power photovoltaic power generation auxiliary coal-fired unit flexible operation system |
| CN114592933A (en) * | 2022-03-21 | 2022-06-07 | 西安热工研究院有限公司 | Combined molten salt energy storage and peak regulation system and method utilizing exhaust steam of intermediate pressure cylinder to store heat |
| CN114961908A (en) * | 2022-06-07 | 2022-08-30 | 华能国际电力股份有限公司 | Solar coal-fired coupling power generation system and method |
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2021
- 2021-08-27 CN CN202122037170.5U patent/CN215595790U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863997A (en) * | 2021-08-27 | 2021-12-31 | 北京工业大学 | Wind power photovoltaic power generation auxiliary coal-fired unit flexible operation system |
| CN114592933A (en) * | 2022-03-21 | 2022-06-07 | 西安热工研究院有限公司 | Combined molten salt energy storage and peak regulation system and method utilizing exhaust steam of intermediate pressure cylinder to store heat |
| CN114592933B (en) * | 2022-03-21 | 2023-05-02 | 西安热工研究院有限公司 | Combined molten salt energy storage peak shaving system and method utilizing exhaust steam and heat storage of medium-pressure cylinder |
| CN114961908A (en) * | 2022-06-07 | 2022-08-30 | 华能国际电力股份有限公司 | Solar coal-fired coupling power generation system and method |
| CN114961908B (en) * | 2022-06-07 | 2023-05-05 | 华能国际电力股份有限公司 | Solar coal-fired coupled power generation system and method |
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