CN108625988A - A kind of CCHP microgrids structure and its operation method containing compressed-air energy storage - Google Patents
A kind of CCHP microgrids structure and its operation method containing compressed-air energy storage Download PDFInfo
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- CN108625988A CN108625988A CN201810388019.6A CN201810388019A CN108625988A CN 108625988 A CN108625988 A CN 108625988A CN 201810388019 A CN201810388019 A CN 201810388019A CN 108625988 A CN108625988 A CN 108625988A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use
- F02C6/14—Gas-turbine plants having means for storing energy, e.g. for meeting peak loads
- F02C6/16—Gas-turbine plants having means for storing energy, e.g. for meeting peak loads for storing compressed air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use
- F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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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
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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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
Abstract
The invention discloses a kind of CCHP microgrids structure and its operation method containing compressed-air energy storage, including：Regenerative resource powering device, gas electricity generator and absorption refrigeration unit at supply of cooling, heating and electrical powers unit, the supply of cooling, heating and electrical powers unit is using natural gas as fuel；Adiabatic compression air energy storage systems compressed air generates thermal energy, and by the thermal energy storage or heat user is directly fed by the adjusting of triple valve, absorbs the thermal energy of different heat sources when releasing energy according to system operating mode.A CAES and new energy CCHP microgrids of providing multiple forms of energy to complement each other are combined, from the angle of flow scheme design and cascaded utilization of energy, optimize the structure and its main operation modes of A CAES, pass through the heat source for cut-offfing adjusting A CAES expansion process backheats of valve, to the energy of various grades in reasonable distribution CCHP microgrids, CCHP system capacity cascade utilization degree is greatly improved.
Description
Technical field
The present invention relates to clean energy resource technical field of comprehensive utilization, more particularly to a kind of CCHP containing compressed-air energy storage
Microgrid structure and operation method.
Background technology
In the case where energy crisis and environmental problem become socio-economic development important restriction factor, reform traditional energy supply
System establishes high efficient and reliable and environmental-friendly novel energy-provision way has gone up energy development strategy for various countries.New energy is more
The complementary supply of cooling, heating and electrical powers microgrid (Combined Cooling Heating and Power, CCHP) of energy is a kind of based on energy ladder
Grade utilizes principle, and the integrated energy system of power generation, refrigeration and heat supply can be achieved at the same time.With distributing-supplying-energy technology, energy system
System control, the rapid development of administrative skill, CCHP are considered as that the best mode of future science energy and energy internet are realized
Important topic in the process.
However, intermittent renewable energy permeability be continuously increased and system it is a variety of can stream between be highly coupled,
The destabilizing factor of system is exacerbated, while reducing adjustable nargin, the stable operation and optimal control of system are proposed
Stern challenge.The especially CCHP microgrids of off-network type, regenerative resource accounting is high, capacity is relatively small, operational process
It is highly prone to the influence of the characteristics such as regenerative resource interval, fluctuation.It has been difficult in this regard, only relying on traditional supply of cooling, heating and electrical powers unit
After, and energy storage and its Optimized-control Technique undoubtedly solve the problems, such as this key and desirable route.Currently, various forms of
Among energy storage, adiabatic compression air energy storage (Adiabatic-Compressed Air Energy Storage, A-CAES) is with it
Long lifespan, stored energy capacitance be big, the cold and hot advantages such as electrical integrated, becomes the ideal energy storage device of CCHP microgrids.
Currently, having carried out in-depth study with efficiency for the structure of A-CAES both at home and abroad.
Document [Design and engineering implementation of non-supplementary fired
compressed air energy storage system:TICC-500] CAES is analyzed as energy-accumulating power station in power grid tune
Effect in peak, frequency modulation, and inquired into structural parameters in non-compensation combustion type compressed-air energy storage in conjunction with demonstration system and generated electricity to system
The influence of efficiency.However, the research limits its ability for having both cold and hot electrical interface mainly from the level analysis system of electric energy.
Document [Multi-objective optimization and exergoeconomic analysis of a
combined cooling, heating and power based compressed air energy storage
System] for by compressed-air energy storage, jet dynamic control and absorption refrigeration unit at CCHP microgrids, withEfficiency with
Economic cost is target, the key parameters such as optimization air pressure, temperature.
Document [Exergy analysis of a Combined Cooling, Heating and Power system
Integrated with wind turbine and compressed air energy storage system] by CAES
It is connected in series with jet dynamic control, waste heat recovery and refrigeration is realized using ORC and Absorption Refrigerator.Meanwhile to export energy
Amount withTarget as parameter designing.Regrettably, these researchs do not fully consider CCHP microgrids work complicated and changeable
The cascade utilization of energy under condition, operational mode and various operational modes.
To sum up, the structure design of CAES and parameter optimization are mostly made with the thermal efficiency of itself or electrical efficiency in the prior art
For foundation, rarely have whole efficiency target as an optimization, and for heat quality the considerations of is insufficient, causes integral energy terraced
Grade producing level is not high；Meanwhile CAES access new energy is provided multiple forms of energy to complement each other after CCHP, lacks row for the changeable operating mode of system complex
Effective optimizing operation method.
Invention content
In order to solve the deficiencies in the prior art, the CCHP microgrid structures containing compressed-air energy storage that the present invention provides a kind of,
The present invention is combined A-CAES and new energy CCHP microgrids of providing multiple forms of energy to complement each other, and greatly improves CCHP system capacity cascade utilizations
Degree.
A kind of CCHP microgrid structures containing compressed-air energy storage, including：Regenerative resource powering device, the renewable energy
Source powering device is connected to adiabatic compression air energy storage systems；
Gas electricity generator and absorption refrigeration unit at supply of cooling, heating and electrical powers unit, the supply of cooling, heating and electrical powers unit is with natural
Gas is fuel, and the output end of the thermal energy of generation is divided into three branches, wherein the input that a branch passes through heat exchanger and heat user
End connection, Article 2 branch are connect by Absorption Refrigerator with the input terminal at colod-application family, and Article 3 branch accesses adiabatic compression
The expanding machine of compressed-air energy storage in air energy storage systems, for heating pressure-air；
The adiabatic compression air energy storage systems compressed air generates thermal energy, by the adjusting of triple valve by the thermal energy storage
Or heat user is directly fed, the thermal energy of different heat sources is absorbed when releasing energy according to system operating mode.
Further preferred technical solution, the regenerative resource powering device include wind power generating set, photovoltaic cell
And solar thermal collector, the wind power generating set, photovoltaic cell directly feed user's electric load by current transformer or are connected to
Adiabatic compression air energy storage systems, the solar thermal collector heat conduction oil and are stored in heat accumulation fuel tank.
Further preferred technical solution, the adiabatic compression air energy storage systems include sequentially connected compressor set,
First Heat Exchanger group, air accumulator, the second heat exchanger group, expander group, high-speed electric expreess locomotive, inverter；The second heat exchanger group is defeated
Enter end and flue, heat conduction oil tank, high temperature water storage tank and normal-temperature water pipeline are respectively connected to by triple valve, output end is logical
It crosses triple valve and is connected to colod-application family or room temperature water circulating apparatus, First Heat Exchanger group is used to exchange heat when compressed air, i.e. recycling pressure
Contract the heat generated；Second heat exchanger group when expanding for exchanging heat, for the heating before gas expansion.
The operating mode of further preferred technical solution, the CCHP microgrid structures containing compressed-air energy storage is：
Power generation mode one, the outlet air of throttle valve is heated using high-temperature flue gas, and high temperature heat conductive oil heats expanding machines at different levels
Outlet air after, waste heat is replaced into load heat supply by high-temperature water by heat exchanger；
Power generation mode two, the exit gas of throttle valve and expanding machine at different levels is heated using high temperature heat conductive oil, and passes through heat exchange
Waste heat is replaced into high-temperature water to load heat supply by device 9；
Heat supply mode heats the exit gas of throttle valve and expanding machine at different levels using the heat of compression of recycling；
Cooling mode, heats the exit gas of throttle valve and expanding machine at different levels using normal-temperature water, recycling cold (cold water,
280K) supply refrigeration duty.
A kind of operation method of the CCHP microgrid structures containing compressed-air energy storage, including：
Step (1)：Wind-powered electricity generation, the photovoltaic prediction output power in next T dispatching cycle are obtained, cold and hot electrical load requirement is pre-
Measured data；
Step (2)：System goal function, including energy conservation rate, system short of electricity rate and environmental benefit index are set；
Step (3)：Constraints is set, the inequality of the equality condition of device characteristics and power, energy range is included
Constraints；
Step (4)：Under the different working modes of the CCHP microgrid structures containing compressed-air energy storage, solution procedure (2) and
The Optimized model that step (3) is formed compares optimum results, selects optimization model, and each target weight is arranged, and solves unit most
Excellent output；
Step (5)：According to the honourable prediction power, cold and hot electrical load requirement and step (4) of each moment t in cycle T
In the obtained planning of unit output, calculate the output of adiabatic compression air energy storage systems.
The energy conservation rate target of further preferred technical solution, the step (2) is expressed as：
Wherein, T is assessment cycle, step-length 1h；Gsp(t) it indicates to divide the total amount for the system consumption energy, including electric energy folding
The energy consumption of calculationWith gas energy consumptionTwo parts：
Wherein,It is point the electric energy and thermal energy for system consumption respectivelyηgrid、ηhRespectively power generation effect
Rate, electrical grid transmission efficiency, gas fired-boiler heating efficiency and heat exchange efficiency.
Further preferred technical solution, step (2) the system short of electricity rate are expressed as：
Wherein, Lec(t) it is t moment electrical load requirement amount；PPV(t)、PWT(t)、PGT(t)、PCAES,out(t)、PCAES,in(t)
The power consumption of photovoltaic, wind-powered electricity generation, gas electricity generator, the generated energy of A-CAES and A-CAES when t is indicated respectively.Different from grid-connected system
System, off-network type microgrid can only rely on energy storage to dissolve extra electricity.Therefore, it when system generated energy is more than stored energy capacitance, will generate
Part abandons wind, abandons light.
Further preferred technical solution, step (2) the environmental benefit index are expressed as：
CCCHP=μfGgas+μeEgrid (4)
Wherein, μfAnd μfThe respectively CO2 emission coefficient of fuel gas and grid generation, GgasAnd EgridRespectively
The gas quantity of consumption and the electricity absorbed from power grid.
The then carbon dioxide discharge-reduction rate C of CCHP microgridsERRMaximization can table be：
Wherein, CspFor the CO2 emissions for dividing for system.
Further preferred technical solution, step (3) A-CAES charge and discharge constraint can table be：
A-CAES electric discharge constraints：
0≤PCAES,out(t)≤Ptur,r (6)
A-CAES charging constraints：
0≤PCAES,in(t)≤Pcom,r (7)
In formula, Pcom,rAnd Ptur,rIt indicates energy storage respectively and releases the maximum power of energy.
Further preferred technical solution, the output operation constraint of step (3) gas electricity generator：
αPGT, max≤PGT(t)≤PGT, max (8)
In formula, α is the start-stop coefficient of unit, and to avoid when rate of load condensate is relatively low, the efficiency of gas electricity generator is too low；
PGT,maxFor the rated power of gas electricity generator.
Further preferred technical solution, step (3) the summer electricity refrigeration is than constraint：
Wherein, Qec、QacElectricity refrigeration and absorption refrigeration are indicated respectively.
Further preferred technical solution, step (3) the A-CAES energy balance constraint：
After A-CAES energy balance characterizes a cycle, the dump energy of energy storage deviates the degree of primary power, can table
For：
Wherein, SOECAES(T)、SOECAES(0) primary power and dump energy of A-CAES in the period, t moment A- are indicated
The expression-form of CAES energy is：
In formula, pstor(t) air pressure of t moment air accumulator is indicated；pstor,0、pstor,uAnd pstor,lRespectively indicate initial gas pressure,
The air accumulator air pressure upper limit and minimum operating air pressure (throttle valve outlet air pressure)；RgFor gas constant, 287.1J/ (kgK)；T0
For environment temperature；qcom,iAnd qtur,iThe mass flow (kg/s) of air, P when respectively compressing, expandinginAnd PoutIt is respectively defeated
Enter, output power, NcomAnd NturSeries when respectively compressing, expanding.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) A-CAES and new energy CCHP microgrids of providing multiple forms of energy to complement each other are combined, from the angle of flow scheme design and cascaded utilization of energy
Degree optimizes the structure and its main operation modes of A-CAES, i.e., adjusts A-CAES expansion process backheats by cut-offfing for valve
Heat source greatly improves CCHP system capacity cascade utilization degree to the energy of various grades in reasonable distribution CCHP microgrids.
(2) under different operating modes the operating mode of optimization system and each active devices cold and hot electric output power.Fully examine
Consider the intermittence of regenerative resource and the reasonable utilization of different quality energies in system, enables the system to source saving rate and emission reduction rate
It is significantly increased, energy storage SOE offsets reduce, to effectively increase the energy saving, the feature of environmental protection and stability of CCHP systems.Together
When, by the optimization to the cold and hot electricity outputs of A-CAES (input) power, improve the ability of system consumption regenerative resource.
Description of the drawings
The accompanying drawings which form a part of this application are used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation do not constitute the improper restriction to the application for explaining the application.
Fig. 1 is CCHP micro-grid systems structure/energy flow chart containing A-CAES of the present invention；
Fig. 2 is A-CAES structure charts；
Fig. 3 (a)-Fig. 3 (c) is the optimum results comparison of each operating mode under each operating mode typical load.
Specific implementation mode
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
In new energy provides multiple forms of energy to complement each other CCHP microgrids, the scheduling mould that regenerative resource consumption and energy-saving and emission-reduction are common is improved
Formula, energy consumption is minimum in system operation to meet user's heat, under the conditions of electricity demanding by the present invention, system minimum emissions, can
Renewable sources of energy consumption rate is up to object function, is scheduled to the output of each active devices of CCHP microgrids containing A-CAES.
In a kind of typical embodiment of the application, as shown in Figure 1, a kind of CCHP microgrid knots containing compressed-air energy storage
Structure, including：Jet dynamic control, A-CAES, BrLi chiller, wind power plant, photovoltaic power generation equipment, solar energy collection
Hot device, heat storage can, heat-exchange system etc.；
Jet dynamic control includes gas electricity generator, waste-heat recovery device, and waste-heat recovery device includes that jacket water waste heat returns
It receives and two parts of flue gas waste heat recovery, wherein flue gas waste heat recovery is divided into two branches, a branch passes through flue gas heat-exchange unit
Hot water supply thermic load is generated, another supply A-CAES is preheated for expanding, and two branches pass through valve regulated；The cylinder sleeve
Water waste heat has two branches, supplies thermic load or supply A-CAES is preheated for expanding.
Solar thermal collector is stored in heat conducting tank for heating conduction oil, high temperature heat conductive oil, and for A-CAES expansion preheatings
Or supply thermic load.
A-CAES systems include compressor set, high pressure tank, expander group, generator；The compressor set is multistage
Compression, consumption electric energy (gas electricity generator, the power supply of wind-powered electricity generation photovoltaic auxiliary) compressed air, and thermal energy is recycled by air-water heat exchanger
(thermal energy is generation heat after internal combustion engine generator power generation, including fume afterheat and jacket water waste heat herein), the thermal energy recycled
Be divided into two branches, one is used for heat supply, is supplied directly to user, another be stored in heat storage can for expand preheating, two branch
Road is switched by the realization of cut-offfing of triple valve 1 and triple valve 2.The expansion module is multiple expansion, is added before expanding machines at different levels
Air-water heat exchanger is used to preheat intake air, and the heat source by changing preheating realizes switching and the system capacity ladder of operating mode
The optimization that grade utilizes.
The switching of various patterns cut-offs realization by triple valve, particularly may be divided into four kinds of patterns：
1) pattern one (based on power generation)：Under this kind of pattern, 2., 3. triple valve 1,2 is connected, and triple valve 3 turns off, recycling
The heat of compression directly feeds load；2., 1. triple valve 4,9 is connected, 1., 3. triple valve 6,10 is connected, triple valve 5,7 3.,
2. being connected, the outlet air of throttle valve is heated using high-temperature flue gas, the high temperature heat conductive oil heating from high temperature oil storage tank is at different levels swollen
After the outlet air of swollen machine, waste heat is replaced by load heat supply of the high-temperature water to CCHP systems by heat exchanger 9.
Still there are the temperature close to 150 DEG C, the effect of heat exchanger 9 to be exactly after high temperature heat conductive oil heating expander outlet air
This partial heat recycling is used for heat supply.
Throttle valve is located at the outlet port of compressed-air energy storage air accumulator.High pressure gas passes through after throttle valve, and temperature is low,
It needs to heat.Under this kind of pattern, this partial air is heated by gas-gas heat exchanger by high-temperature flue gas.
2) pattern two (based on power generation)：Under this kind of pattern, 2., 3. triple valve 1,2 is connected, and triple valve 3 turns off, recycling
The heat of compression directly feeds load；2., 1. triple valve 4,9 is connected, 1., 3. triple valve 6,10 is connected, triple valve 5 3., 1.
1., 2. conducting, triple valve 7 are connected, the exit gas of throttle valve and expanding machine at different levels is heated using high temperature heat conductive oil, and pass through
Waste heat is replaced into high-temperature water to system heat supply by heat exchanger 9.
3) pattern three (based on heat supply)：Under this kind of pattern, 2., 1. triple valve 1,2 is connected, 2., 3. triple valve is connected, and returns
The heat of compression of receipts is stored in heat storage water tank；2., 3. triple valve 4,9 is connected, 2., being 3. connected for triple valve 6,10 utilizes recycling
The heat of compression heating throttle valve and expanding machine at different levels exit gas.
4) pattern four (based on cooling)：Under this kind of pattern, 2., 3. triple valve 1,2 is connected, the heat of compression of recycling directly supplies
To load；1., 3. triple valve is connected, 2., 3. triple valve 4,9 is connected, and 2., being 3. connected for triple valve 6,10 utilizes normal-temperature water
Heat the exit gas of throttle valve and expanding machine at different levels.2., 3. triple valve 8,11 is connected, recycling cold (cold water, 280K) supplies
To refrigeration duty.
A kind of new energy containing A-CAES is provided multiple forms of energy to complement each other CCHP system optimized operation strategies, is included the following steps：
Step (1)：Next cycle data is predicted according to history value, obtains the wind in next scheduling time section T, light is predicted
Data, cold and hot electrical load requirement prediction data；
Step (2)：Object function is set：
Energy conservation rate：Energy conservation rate (Primary Energy Savings Ratio, PESR), is defined as CCHP systems
The energy of opposite point of the system for system saving and point the ratio between the energy consumed for system.Using the maximization of energy conservation rate as excellent
Change one of target, can table be：
Wherein, T is assessment cycle, step-length 1h；GCCHPIt is the primary energy of CCHP system consumptions, Gsp(t) a point confession is indicated
The total amount of the system consumption energy includes the energy consumption of electric energy conversionWith gas energy consumptionTwo parts：
Wherein,It is point the electric energy and thermal energy for system consumption respectively,ηgrid、ηhRespectively generate electricity
Efficiency, electrical grid transmission efficiency, gas fired-boiler heating efficiency and heat exchange efficiency.
System security reliability index：System security reliability characterizes the ability of power supply system continued power, can use short of electricity
Rate (Loss of Power Supply Probability, LPSP) is weighed, and is defined as in a certain stage, system cannot meet
Workload demand divided by total workload demand.Load short of electricity rate characterize CCHP microgrids security reliability, using its minimum as
One of target of running Optimization, can table be：
Wherein, Lec(t) it is t moment electrical load requirement amount；PPV(t)、PWT(t)、PGT(t)、PCAES,out(t)、PCAES,in(t)
The power consumption of photovoltaic, wind-powered electricity generation, gas electricity generator, the generated energy of A-CAES and A-CAES when t is indicated respectively.Different from grid-connected system
System, off-network type microgrid can only rely on energy storage to dissolve extra electricity.Therefore, it when system generated energy is more than stored energy capacitance, will generate
Part abandons wind, abandons light.
Environmental benefit index：The consumption of combustion gas is greatly reduced by the cascade utilization of the energy for CCHP microgrids, helps to delay
Solve greenhouse effects.Carbon dioxide discharge-reduction rate (emission reduction ratio, ERR) is chosen as a result, is used as environmental evaluation
Index.For General System, total emission volumn CCCHPIt may be defined as：
CCCHP=μfGgas+μeEgrid (4)
Wherein, μfAnd μfThe respectively CO2 emission coefficient of fuel gas and grid generation, GgasAnd EgridRespectively
The gas quantity of consumption and the electricity absorbed from power grid.The then carbon dioxide discharge-reduction rate C of CCHP microgridsERRMaximization can table be：
Wherein, CspFor the CO2 emissions for dividing for system.
Step (3)：Constraints is set:
Step (3) A-CAES charge and discharge constraint can table be：
A-CAES electric discharge constraints：
0≤PCAES,out(t)≤Ptur,r (6)
A-CAES charging constraints：
0≤PCAES,in(t)≤Pcom,r (7)
In formula, Pcom,rAnd Ptur,rIt indicates energy storage respectively and releases the maximum power of energy.
The output operation constraint of step (3) gas electricity generator：
αPGT, max≤PGT(t)≤PGT, max (8)
In formula, α is the start-stop coefficient of unit, and to avoid when rate of load condensate is relatively low, the efficiency of gas electricity generator is too low；
PGT,maxFor the rated power of gas electricity generator.
Step (3) the summer electricity refrigeration is than constraint：
Wherein, Qec、QacElectricity refrigeration and absorption refrigeration are indicated respectively.
Step (3) the A-CAES energy balance constraint：
After A-CAES energy balance characterizes a cycle, the dump energy of energy storage deviates the degree of primary power, can table
For：
Wherein, SOECAES(T)、SOECAES(0) primary power and dump energy of A-CAES in the period are indicated.T moment A-
The expression-form of CAES energy is：
In formula, pstor(t) air pressure of t moment air accumulator is indicated；pstor,0、pstor,uAnd pstor,lRespectively indicate initial gas pressure,
The air accumulator air pressure upper limit and minimum operating air pressure (throttle valve outlet air pressure)；RgFor gas constant, 287.1J/ (kgK)；T0
For environment temperature；qcom,iAnd qtur,iThe mass flow (kg/s) of air, P when respectively compressing, expandinginAnd PoutIt is respectively defeated
Enter, output power, NcomAnd NturSeries when respectively compressing, expanding.
The Optimized model under each pattern is solved using Multiobjective Intelligent algorithm, optimal operating mode in next period can be obtained
It is planned with optimal output of each active devices within the period.
The present invention from the angle of flow scheme design and cascaded utilization of energy, optimize CCHP microgrids structure containing A-CAES and its
Main operation modes；Relative to simple non-thermal electricity supply CAES system, under identical stored energy capacitance, which can effectively increase
The thermoelectricity association of strong system improves system capacity cascade utilization degree.Fig. 3 (a)-Fig. 3 (c) is shown under each operating mode (season)
Optimum results.Fig. 3 (a) is summer typical day optimum results, Fig. 3 (b) winters typical case's day optimum results, Fig. 3 (c) conditioning in Transition Season typical cases
Day optimum results, it can be seen that use rational A-CAES operating modes under different operating modes, be only and efficiently utilize CCHP microgrids
The effective way of middle difference grade thermal energy.By system structure proposed by the present invention and its result and existing method of operation reserve
(document [Hybrid CCHP system combined with compressed air energy storage [J]
.International Journal of Energy Research]) (table 1) is compared as it can be seen that using energy source under the operation reserve
Rate has apparent increase with emission reduction rate, so as to improve the overall performance of system.
The Comparative result of table 1 present invention carried optimisation strategy and Existing policies
| Season | Optimisation strategy | Comparison | |
| Winter | ERR | 65.07% | 59.17% |
| PESR | 61.80% | 54.67% | |
| Conditioning in Transition Season | ERR | 65.32% | 61.29% |
| PESR | 57.87% | 55.97% | |
| Summer | ERR | 61.17% | 59.65% |
| PESR | 57.09% | 51.28% |
The present invention realizes the utilization to different grade heat sources in system by the optimization to A-CAES operating modes, to
The thermoelectricity association for enhancing system, improves CCHP microgrid energy cascade utilization abilities and regenerative resource consumption rate.The present invention
For the system structure proposed, the multi-target optimum operation strategy of design meter and energy storage SOE, which has fully considered can be again
The reasonable utilization of the intermittence quality energy different from system of the raw energy, enables the system to source saving rate and substantially increases with emission reduction rate
Add.
The foregoing is merely the preferred embodiments of the application, are not intended to limit this application, for the skill of this field
For art personnel, the application can have various modifications and variations.Within the spirit and principles of this application, any made by repair
Change, equivalent replacement, improvement etc., should be included within the protection domain of the application.
Claims (10)
1. a kind of CCHP microgrid structures containing compressed-air energy storage, characterized in that including：Regenerative resource powering device, it is described
Regenerative resource powering device is connected to adiabatic compression air energy storage systems；
Gas electricity generator and absorption refrigeration unit at supply of cooling, heating and electrical powers unit, the supply of cooling, heating and electrical powers unit is with natural gas
The output end of fuel, the thermal energy of generation is divided into three branches, wherein a branch is connected by the input terminal of heat exchanger and heat user
It connects, Article 2 branch is connect by Absorption Refrigerator with the input terminal at colod-application family, and Article 3 branch accesses adiabatic compression air
The expanding machine of compressed-air energy storage in energy-storage system, for heating pressure-air；
The adiabatic compression air energy storage systems compressed air generates thermal energy, by the adjusting of triple valve by the thermal energy storage or directly
Supply heat user is connect, absorbs the thermal energy of different heat sources when releasing energy according to system operating mode.
2. a kind of CCHP microgrid structures containing compressed-air energy storage as described in claim 1, characterized in that the renewable energy
Source powering device includes wind power generating set, photovoltaic cell and solar thermal collector, and the wind power generating set, photovoltaic cell are logical
It crosses current transformer to directly feed user's electric load or be connected to adiabatic compression air energy storage systems, the solar thermal collector heating is led
Deep fat is simultaneously stored in heat accumulation fuel tank.
3. a kind of CCHP microgrid structures containing compressed-air energy storage as described in claim 1, characterized in that the adiabatic compression
Air energy storage systems include sequentially connected compressor set, First Heat Exchanger group, air accumulator, the second heat exchanger group, expander group,
High-speed electric expreess locomotive, inverter；The second heat exchanger group input terminal is respectively connected to flue by triple valve, conduction oil stores up
Tank, high temperature water storage tank and normal-temperature water pipeline, output end are connected to colod-application family or room temperature water circulating apparatus by triple valve, and first
Heat exchanger group is used to exchange heat when compressed air, i.e., the heat that recycling compression generates；Second heat exchanger group is used for exchanging heat when expanding
Heating before gas expansion.
4. a kind of CCHP microgrid structures containing compressed-air energy storage as described in claim 1, characterized in that stored up containing compressed air
Can the operating modes of CCHP microgrid structures be：
Power generation mode one, the outlet air of throttle valve is heated using high-temperature flue gas, and high temperature heat conductive oil heats going out for expanding machines at different levels
After mouth air, waste heat is replaced into load heat supply by high-temperature water by heat exchanger；
Power generation mode two heats the exit gas of throttle valve and expanding machine at different levels using high temperature heat conductive oil, and will by heat exchanger 9
Waste heat is replaced into high-temperature water to load heat supply；
Heat supply mode heats the exit gas of throttle valve and expanding machine at different levels using the heat of compression of recycling；
Cooling mode, the exit gas of throttle valve and expanding machine at different levels is heated using normal-temperature water, and recycling cold supplies refrigeration duty.
5. using a kind of operation method of any CCHP microgrid structures containing compressed-air energy storage of claim 1-4,
It is characterized in, including：
Step (1)：Wind-powered electricity generation, the photovoltaic prediction output power in next T dispatching cycle are obtained, cold and hot electrical load requirement predicts number
According to；
Step (2)：System goal function, including energy conservation rate, system short of electricity rate and environmental benefit index are set；
Step (3)：Constraints is set, the inequality constraints of the equality condition of device characteristics and power, energy range is included
Condition；
Step (4)：Under the different working modes of the CCHP microgrid structures containing compressed-air energy storage, solution procedure (2) and step
(3) Optimized model formed compares optimum results, selects optimization model, is arranged each target weight, solve unit it is optimal go out
Power；
Step (5)：It is obtained according in the honourable prediction power, cold and hot electrical load requirement of each moment t in cycle T and step (4)
The planning of the unit output arrived calculates the output of adiabatic compression air energy storage systems.
6. a kind of operation method of the CCHP microgrid structures containing compressed-air energy storage as claimed in claim 5, characterized in that institute
The energy conservation rate target for stating step (2) is expressed as：
Wherein, T is assessment cycle, step-length 1h；Gsp(t) indicate point for the system consumption energy total amount, including electric energy conversion
Energy consumptionWith gas energy consumptionTwo parts：
Wherein,It is point the electric energy and thermal energy for system consumption respectively,ηgrid、ηhRespectively generating efficiency,
Electrical grid transmission efficiency, gas fired-boiler heating efficiency and heat exchange efficiency.
7. a kind of operation method of the CCHP microgrid structures containing compressed-air energy storage as claimed in claim 5, characterized in that institute
Step (2) system short of electricity rate is stated to be expressed as：
Wherein, Lec(t) it is t moment electrical load requirement amount；PPV(t)、PWT(t)、PGT(t)、PCAES,out(t)、PCAES,in(t) respectively
Indicate the power consumption of photovoltaic, wind-powered electricity generation, gas electricity generator, the generated energy of A-CAES and A-CAES when t.
8. a kind of operation method of the CCHP microgrid structures containing compressed-air energy storage as claimed in claim 5, characterized in that institute
Step (2) environmental benefit index is stated to be expressed as：
CCCHP=μfGgas+μeEgrid (4)
Wherein, μfAnd μfThe respectively CO2 emission coefficient of fuel gas and grid generation, GgasAnd EgridRespectively consume
Gas quantity and from power grid absorb electricity.
9. a kind of operation method of the CCHP microgrid structures containing compressed-air energy storage as claimed in claim 5, characterized in that institute
State step (3) A-CAES charge and discharge constraint can table be：
A-CAES electric discharge constraints：
0≤PCAES,out(t)≤Ptur,r (6)
A-CAES charging constraints：
0≤PCAES,in(t)≤Pcom,r (7)
In formula, Pcom,rAnd Ptur,rIt indicates energy storage respectively and releases the maximum power of energy；
The output operation constraint of step (3) gas electricity generator：
αPGT, max≤PGT(t)≤PGT, max (8)
In formula, α is the start-stop coefficient of unit, and to avoid when rate of load condensate is relatively low, the efficiency of gas electricity generator is too low；PGT,maxFor
The rated power of gas electricity generator.
10. a kind of operation method of the CCHP microgrid structures containing compressed-air energy storage as claimed in claim 5, characterized in that
Step (3) the summer electricity refrigeration is than constraint：
Wherein, Qec、QacElectricity refrigeration and absorption refrigeration are indicated respectively；
Step (3) the A-CAES energy balance constraint：
After A-CAES energy balance characterizes a cycle, the dump energy of energy storage deviates the degree of primary power, can table be：
Wherein, SOECAES(T)、SOECAES(0) primary power and dump energy of A-CAES in the period, t moment A-CAES energy are indicated
The expression-form of amount is：
In formula, pstor(t) air pressure of t moment air accumulator is indicated；pstor,0、pstor,uAnd pstor,lInitial gas pressure, gas storage are indicated respectively
The tank air pressure upper limit and minimum operating air pressure (throttle valve outlet air pressure)；RgFor gas constant, 287.1J/ (kgK)；T0For ring
Border temperature；qcom,iAnd qtur,iThe mass flow (kg/s) of air, P when respectively compressing, expandinginAnd PoutIt respectively inputs, is defeated
Go out power, NcomAnd NturSeries when respectively compressing, expanding.
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