CN105221345B - A kind of cogeneration type compressed-air energy-storage system and its control method - Google Patents
A kind of cogeneration type compressed-air energy-storage system and its control method Download PDFInfo
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- CN105221345B CN105221345B CN201510624325.1A CN201510624325A CN105221345B CN 105221345 B CN105221345 B CN 105221345B CN 201510624325 A CN201510624325 A CN 201510624325A CN 105221345 B CN105221345 B CN 105221345B
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- 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
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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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
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Abstract
The present invention relates to a kind of cogeneration type compressed-air energy-storage systems, including cogeneration units and adiabatic compression air energy-storage units；Cogeneration units include thermoelectricity unit boiler, the output end of thermoelectricity unit boiler is provided with the first branch and second branch, the first branch is connected by the input terminal of steam turbine and heat user, the second branch is connected by the input terminal of thermoelectricity unit steam converter valve and heat user, and the steam turbine is connect with generator；The output end of the heat user is connect by the second vapor-water heat exchanger with the input terminal of thermoelectricity unit boiler；The adiabatic compression air energy-storage units include sequentially connected compressor, the second vapor-water heat exchanger, air accumulator, the first vapor-water heat exchanger, turbine expansion equipment, first clutch, generator motor, second clutch, and the second clutch is connect with compressor；The heat user is in parallel with the first vapor-water heat exchanger, is additionally provided with steam control valve on the input channel of heat user and the first vapor-water heat exchanger.
Description
Technical field
The invention belongs to clean energy resource technical field of comprehensive utilization, are related to a kind of cogeneration type compressed-air energy-storage system
And its control method.
Background technique
As Wind Power In China develops and uses scale continuous enlargement, wind-electricity integration operation and market consumption have become restriction wind-powered electricity generation
An important factor for development.China's wind-powered electricity generation relatively concentrates on three northern areas of China, and winter nighttime wind speed is very big, but night electrical load requirement
It is lower, since the heat supply in winter phase is to guarantee that heating demand, cogeneration units majority operate in the mode of " electricity determining by heat ", especially
It is for existing back pressure type thermoelectricity units a large amount of in steam power plant, output hotspot stress is fixed, it is difficult to be participated in peak regulation, be caused low ebb
When serious wind-abandoning phenomenon.
With the development of energy storage technology, " peak load shifting " is carried out to wind-powered electricity generation using energy storage, is deposited in night electric load low ebb
Extra wind-powered electricity generation is stored up, is discharged at electric load peak on daytime, the effective means for improving the digestion capability of wind-powered electricity generation is had become.Especially
It is compressed air energy storage technology because it has the advantages that energy storage is at low cost, environmental-friendly, loss due to becomes standby in recent years without phase-change
Concerned extensive energy storage technology.
The storage that single electric energy is all related only to currently with the method that compressed-air energy storage improves wind electricity digestion, fails
Enough hotspot stress by energy storage and the existing cogeneration units of adjusting combine, to improve the peak modulation capacity of thermoelectricity unit itself,
Reduce the stored energy capacitance needed under same consumption wind-powered electricity generation.This is in place of the deficiencies in the prior art.
Therefore it provides a kind of cogeneration type compressed-air energy-storage system and its control method are designed, to solve above-mentioned skill
Art problem, is necessary.
Summary of the invention
It is an object of the present invention to design a kind of cogeneration in view of the above-mentioned drawbacks of the prior art, providing
Type compressed-air energy-storage system and its control method, to solve the above technical problems.
To achieve the above object, the present invention provides following technical scheme:
A kind of cogeneration type compressed-air energy-storage system, including cogeneration units and adiabatic compression air energy storage list
Member, it is characterised in that:
The cogeneration units include thermoelectricity unit boiler, and the output end of the thermoelectricity unit boiler is provided with first
Road and second branch, the first branch are connected by the input terminal of steam turbine and heat user, and the second branch passes through thermoelectricity
The connection of the input terminal of unit steam converter valve and heat user, the steam turbine are connect with generator；The output end of the heat user
It is connect by the second vapor-water heat exchanger with the input terminal of thermoelectricity unit boiler；
The adiabatic compression air energy-storage units include sequentially connected compressor, the second vapor-water heat exchanger, air accumulator,
One vapor-water heat exchanger, turbine expansion equipment, first clutch, generator motor, second clutch, the second clutch and pressure
The connection of contracting machine；
The heat user is in parallel with the first vapor-water heat exchanger, on the input channel of heat user and the first vapor-water heat exchanger also
Equipped with steam control valve.
Preferably, the first vapor-water heat exchanger connection enters high pressure airline and steam turbine before turbine expansion equipment
Steam output circuit；So as to enter the gas before turbine expansion equipment using steam-turbine heat.
Preferably, the first branch is metallic conduit；The conducting of water flow can not only be realized using metallic conduit, and
And it is not perishable.
Preferably, the first branch is stainless steel pipes；It is anticorrosive, long service life.
It preferably, is to be enclosed with insulating layer outside the first branch；The first branch can either be protected, and can be effective
Delay the cooling rate of hot water in the first branch.
Preferably, the second branch is metallic conduit；The conducting of water flow can not only be realized using metallic conduit, and
And it is not perishable.
Preferably, the second branch is stainless steel pipes；It is anticorrosive, long service life.
Preferably, the second branch is wrapped with insulating layer；Second branch can either be protected, and can effectively be prolonged
The cooling rate of hot water in slow second branch.
A kind of control method of cogeneration type compressed-air energy-storage system, comprising the following steps:
Step (1): wind-powered electricity generation the prediction output power, thermal load demands prediction data in next scheduling time section T are obtained
With electrical load requirement prediction data；
Step (2): the equivalent coal consumption amount of wind power dissolved according to the coal consumption amount of t moment back pressure type thermoelectricity unit, t moment
System goal function is set with the equivalent energy consumption of compressed-air energy-storage system t moment；
Step (3): setting constraint condition, according to the system goal function and constraint condition of step (2), when solving any
Carve adiabatic compression air energy-storage units and the optimal output power of cogeneration units；The constraint condition includes that electric load balances about
Beam, heat load balance constraint, cogeneration units processing constraint, unit ramping rate constraints and adiabatic compression air energy storage list
First capacity-constrained；
The specific steps of the step (2) are as follows:
The quadric form of generated output is expressed as the heat supply coal consumption amount of back pressure type cogeneration units:
In formula: C1(i, t) indicates the coal consumption amount of t moment back pressure type thermoelectricity unit, ai、bi、ciFor back pressure type thermoelectricity unit i
Coal consumption coefficient；For i-th back pressure type thermoelectricity unit t moment generated output；
T moment dissolves the equivalent coal consumption amount C of wind-powered electricity generation consumption2(t) it is
C2(t)=0；
If adiabatic compression air energy-storage units energy storage efficiency is η, the then equivalent energy consumption of adiabatic compression air energy-storage units t moment
C3(t) are as follows:
C in formulaaveFor entire unit of cells power averaging energy consumption,It is adiabatic compression air energy-storage units in t moment
Generated output；
pe1Indicate back pressure thermoelectricity unit generated output, pe2Indicate the wind power of consumption, pe3Indicate the storage of adiabatic compression air
It can unit generated output；
Establish system goal function are as follows:
Wherein, C (t) is the total consumption of coal amount of whole system, C1(i, t) indicates the coal consumption amount of t moment back pressure type thermoelectricity unit,
C2It (t) is the equivalent coal consumption amount of wind power of t moment consumption, C3It (t) is the equivalent energy consumption of adiabatic compression air energy-storage units t moment,Indicate i-th thermoelectricity unit in the electrical power of t moment,Indicate the wind-powered electricity generation electrical power dissolved in t moment,Indicate exhausted
The electrical power of hot compressed air energy-storage units t moment；
The electric load Constraints of Equilibrium and heat load balance of the step (3) constrain:
In formulaFor the equivalent electric load power of t moment,For t moment thermic load power, cvFor adiabatic compression air energy storage
Unit hotspot stress；
The cogeneration units units limits of the step (3):
Wherein, cmIndicate the hotspot stress of cogeneration units, KiFor constant, Pe1,min,iHave for cogeneration units i minimum
Function power output, Pe1,max,iRespectively cogeneration units i maximum active power output；
The unit ramping rate constraints of the step (3):
Pup,iFor the upward ramping rate constraints of cogeneration units i, Pdown,iFor the downward creep speed of cogeneration units i
Constraint；
The adiabatic compression air energy-storage units capacity-constrained of the step (3):
N≤T in formula, S are energy storage rated capacity；
According to objective function and constraint condition, any time adiabatic compression air energy-storage units and cogeneration of heat and power machine are solved
The optimal output power of group.
The beneficial effects of the present invention are the high pressure-temperature air of the compressor output passes through the second carbonated drink by the road and changes
The backwater end of hot device and thermoelectricity unit boiler carries out heat exchange, to heat before entering thermoelectricity unit boiler to heat supply return water；
Adiabatic compression air energy-storage units and cogeneration units carry out the coupling of electric energy and thermal energy, the storage of adiabatic compression air
Can cell compression air energy storage when can thermoelectric coproduction unit heat supply, release air power generation when can absorb cogeneration units
Thermal energy.In addition, design principle of the present invention is reliable, structure is simple, has very extensive application prospect.
It can be seen that compared with prior art, the present invention having substantive features and progress, the beneficial effect implemented
It is obvious.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of cogeneration type compressed-air energy-storage system provided by the invention.
Wherein, 1.1- thermoelectricity unit boiler, the 1.2- first branch, 1.3- second branch, 1.4- steam turbine, 1.5- heat are used
Family, 1.6- thermoelectricity unit steam converter valve, 2.1- compressor, 2.2 second vapor-water heat exchangers, 2.3 air accumulators, 2.4 first carbonated drinks
Heat exchanger, 2.5- turbine expansion equipment, 2.6- first clutch, 2.7- generator motor, 2.8 second clutches, 2.9- steam
Regulating valve.
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawing and by specific embodiment, and following embodiment is to the present invention
Explanation, and the invention is not limited to following implementation.
As shown in Figure 1, a kind of cogeneration type compressed-air energy-storage system provided by the invention, including cogeneration units
With adiabatic compression air energy-storage units；
The cogeneration units include thermoelectricity unit boiler 1.1, and the output end of the thermoelectricity unit boiler 1.1 is provided with
The first branch 1.2 and second branch 1.3, the first branch 1.2 are connect by steam turbine 1.4 with the input terminal of heat user 1.5,
The second branch 1.3 is connect by thermoelectricity unit steam converter valve 1.6 with the input terminal of heat user 1.5, the steam turbine 1.4
It is connect with generator；The output end of the heat user 1.5 is defeated by the second vapor-water heat exchanger 2.2 and thermoelectricity unit boiler 1.1
Enter end connection；
The adiabatic compression air energy-storage units include sequentially connected compressor 2.1, the second vapor-water heat exchanger 2.2, storage
Gas tank 2.3, the first vapor-water heat exchanger 2.4, turbine expansion equipment 2.5, first clutch 2.6, generator motor 2.7, second from
Clutch 2.8, the second clutch 2.8 are connect with compressor 2.1；
The heat user 1.5 is in parallel with the first vapor-water heat exchanger 2.4, in heat user 1.5 and the first vapor-water heat exchanger 2.4
Steam control valve 2.9 is additionally provided on input channel.
In the present embodiment, the connection of the first vapor-water heat exchanger 2.4 enters the high-pressure air tube before turbine expansion equipment 2.5
The steam output circuit on road and steam turbine；So as to enter the gas before turbine expansion equipment using steam-turbine heat
Body.
In the present embodiment, the first branch 1.2 is metallic conduit；Water flow can not only be realized using metallic conduit
Conducting, and it is not perishable.
In the present embodiment, the first branch 1.2 is stainless steel pipes；It is anticorrosive, long service life.
In the present embodiment, insulating layer is enclosed with outside the first branch 1.2；The first branch can either be protected, and
The cooling rate of hot water in the first branch can effectively be delayed.
In the present embodiment, the second branch 1.3 is metallic conduit；Water flow can not only be realized using metallic conduit
Conducting, and it is not perishable.
In the present embodiment, the second branch 1.3 is stainless steel pipes；It is anticorrosive, long service life.
In the present embodiment, the second branch 1.3 is wrapped with insulating layer；Second branch, Er Qieneng can either be protected
Enough cooling rates for effectively delaying hot water in second branch.
The present embodiment also provides a kind of control method of cogeneration type compressed-air energy-storage system, comprising the following steps:
Step (1): wind-powered electricity generation the prediction output power, thermal load demands prediction data in next scheduling time section T are obtained
With electrical load requirement prediction data；
Step (2): the equivalent coal consumption amount of wind power dissolved according to the coal consumption amount of t moment back pressure type thermoelectricity unit, t moment
System goal function is set with the equivalent energy consumption of compressed-air energy-storage system t moment；
Step (3): setting constraint condition, according to the system goal function and constraint condition of step (2), when solving any
Carve adiabatic compression air energy-storage units and the optimal output power of cogeneration units；The constraint condition includes that electric load balances about
Beam, heat load balance constraint, cogeneration units processing constraint, unit ramping rate constraints and adiabatic compression air energy storage list
First capacity-constrained；
The specific steps of the step (2) are as follows:
The quadric form of generated output is expressed as the heat supply coal consumption amount of back pressure type cogeneration units:
In formula: C1(i, t) indicates the coal consumption amount of t moment back pressure type thermoelectricity unit, ai、bi、ciFor back pressure type thermoelectricity unit i
Coal consumption coefficient；For i-th back pressure type thermoelectricity unit t moment generated output；
T moment dissolves the equivalent coal consumption amount C of wind-powered electricity generation consumption2(t) it is
C2(t)=0；
If adiabatic compression air energy-storage units energy storage efficiency is η, the then equivalent energy consumption of adiabatic compression air energy-storage units t moment
C3(t) are as follows:
C in formulaaveFor entire unit of cells power averaging energy consumption,It is adiabatic compression air energy-storage units in t moment
Generated output；
pe1Indicate back pressure thermoelectricity unit generated output, pe2Indicate the wind power of consumption, pe3Indicate the storage of adiabatic compression air
It can unit generated output；
Establish system goal function are as follows:
Wherein, C (t) is the total consumption of coal amount of whole system, C1(i, t) indicates the coal consumption amount of t moment back pressure type thermoelectricity unit,
C2It (t) is the equivalent coal consumption amount of wind power of t moment consumption, C3It (t) is the equivalent energy consumption of adiabatic compression air energy-storage units t moment,Indicate i-th thermoelectricity unit in the electrical power of t moment,Indicate the wind-powered electricity generation electrical power dissolved in t moment,Indicate exhausted
The electrical power of hot compressed air energy-storage units t moment；
The electric load Constraints of Equilibrium and heat load balance of the step (3) constrain:
In formulaFor the equivalent electric load power of t moment,For t moment thermic load power, cvFor adiabatic compression air energy storage
Unit hotspot stress；
The cogeneration units units limits of the step (3):
Wherein, cmIndicate the hotspot stress of cogeneration units, KiFor constant, Pe1,min,iHave for cogeneration units i minimum
Function power output, Pe1,max,iRespectively cogeneration units i maximum active power output；
The unit ramping rate constraints of the step (3):
Pup,iFor the upward ramping rate constraints of cogeneration units i, Pdown,iFor the downward creep speed of cogeneration units i
Constraint；
The adiabatic compression air energy-storage units capacity-constrained of the step (3):
N≤T in formula, S are energy storage rated capacity；
According to objective function and constraint condition, any time adiabatic compression air energy-storage units and cogeneration of heat and power machine are solved
The optimal output power of group.
Disclosed above is only the preferred embodiment of the present invention, but the present invention is not limited to this, any this field
What technical staff can think does not have creative variation, and without departing from the principles of the present invention made by several improvement and
Retouching, should all be within the scope of the present invention.
Claims (1)
1. a kind of control method of cogeneration type compressed-air energy-storage system, comprising the following steps:
Step (1): wind-powered electricity generation prediction output power, thermal load demands prediction data and the electricity in next scheduling time section T are obtained
Workload demand prediction data；
Step (2): the equivalent coal consumption amount of wind power and pressure dissolved according to the coal consumption amount of t moment back pressure type thermoelectricity unit, t moment
The equivalent energy consumption of contracting air energy storage systems t moment is to be arranged system goal function；
Step (3): it is exhausted to solve any time according to the system goal function and constraint condition of step (2) for setting constraint condition
Hot compressed air energy-storage units and the optimal output power of cogeneration units；The constraint condition include electric load Constraints of Equilibrium,
Heat load balance constraint, cogeneration units processing constraint, unit ramping rate constraints and adiabatic compression air energy-storage units
Capacity-constrained；
The specific steps of the step (2) are as follows:
The quadric form of generated output is expressed as the heat supply coal consumption amount of back pressure type cogeneration units:
In formula: C1(i, t) indicates the coal consumption amount of t moment back pressure type thermoelectricity unit, ai、bi、ciFor the coal consumption of back pressure type thermoelectricity unit i
Coefficient；For i-th back pressure type thermoelectricity unit t moment generated output；
T moment dissolves the equivalent coal consumption amount C of wind-powered electricity generation consumption2(t) it is
C2(t)=0；
If adiabatic compression air energy-storage units energy storage efficiency is η, then the equivalent energy consumption C of adiabatic compression air energy-storage units t moment3(t)
Are as follows:
C in formulaaveFor entire unit of cells power averaging energy consumption,For adiabatic compression air energy-storage units t moment power generation function
Rate；
pe1Indicate back pressure thermoelectricity unit generated output, pe2Indicate the wind power of consumption, pe3Indicate adiabatic compression air energy storage list
First generated output；
Establish system goal function are as follows:
Wherein, C (t) is the total consumption of coal amount of whole system, C1(i, t) indicates the coal consumption amount of t moment back pressure type thermoelectricity unit, C2(t)
For the equivalent coal consumption amount of wind power of t moment consumption, C3It (t) is the equivalent energy consumption of adiabatic compression air energy-storage units t moment,
Indicate i-th thermoelectricity unit in the electrical power of t moment,Indicate the wind-powered electricity generation electrical power dissolved in t moment,Indicate insulation pressure
The electrical power of contracting air energy-storage units t moment；
The electric load Constraints of Equilibrium and heat load balance of the step (3) constrain:
In formulaFor the equivalent electric load power of t moment,For t moment thermic load power, cvFor adiabatic compression air energy-storage units
Hotspot stress；
The cogeneration units units limits of the step (3):
Wherein, cmIndicate the hotspot stress of cogeneration units, KiFor constant, Pe1,min,iIt is active out for cogeneration units i minimum
Power, Pe1,max,iRespectively cogeneration units i maximum active power output；
The unit ramping rate constraints of the step (3):
Pup,iFor the upward ramping rate constraints of cogeneration units i, Pdown,iFor the downward ramping rate constraints of cogeneration units i；
The adiabatic compression air energy-storage units capacity-constrained of the step (3):
N≤T in formula, S are energy storage rated capacity；
According to objective function and constraint condition, any time adiabatic compression air energy-storage units and cogeneration units are solved most
Excellent output power.
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| CN106089338B (en) * | 2016-06-03 | 2018-09-14 | 东南大学 | A kind of back pressure machine association system and method adjusting heat supply and power generation |
| CN108224535B (en) * | 2018-01-18 | 2020-03-24 | 中国科学院工程热物理研究所 | Complementary integrated system of cogeneration of thermal power plant and compressed air energy storage |
| CN110991735B (en) * | 2019-11-29 | 2024-04-05 | 国家电网有限公司 | Optimal scheduling method of combined heat and power system considering AA-CAES |
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| WO2010125568A2 (en) * | 2009-04-28 | 2010-11-04 | Technion- Research And Development Foundation Ltd. | A system for wind energy harvesting and storage wising compressed air and hot water |
| CN101950962B (en) * | 2010-08-24 | 2012-05-23 | 西安交通大学 | System and method for saving energy and shaving peak by coordinating cogeneration set and wind energy generator set |
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