CN110245863A - A kind of electrical association system based on electric conversion energy storage and regulate and control method online - Google Patents
A kind of electrical association system based on electric conversion energy storage and regulate and control method online Download PDFInfo
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- CN110245863A CN110245863A CN201910513732.3A CN201910513732A CN110245863A CN 110245863 A CN110245863 A CN 110245863A CN 201910513732 A CN201910513732 A CN 201910513732A CN 110245863 A CN110245863 A CN 110245863A
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
- G06Q10/0631—Resource planning, allocation, distributing or scheduling for enterprises or organisations
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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Abstract
The present invention provides a kind of electrical association system based on electric conversion energy storage and regulates and controls method online, is related to electrical association system technology field.Step of the present invention are as follows: obtain the energy source information of present period t in electrical association system, the information on load of air accumulator air pressure and present period t；The electric load of present period t in the Wind turbines power output and load cell of present period t in electrical association system and the variable quantity of thermic load are monitored, judge whether electrical association system occurs energy update, if, the online regulating strategy for then using electric conversion energy storage, if otherwise maintaining original operating status；If t < T, this scheduling slot terminates, and reacquires energy source information, air accumulator air pressure and information on load after enabling t=t+1；If t=T, terminate the scheduling in this period.Turn the orderly cooperation between gas equipment, gas turbine, gas cogeneration unit, gas fired-boiler and air accumulator by electricity, enhances the flexibility of electrical association system operation.
Description
Technical field
The present invention relates to electrical association system technology field more particularly to a kind of electrical joints based on electric conversion energy storage
System and regulate and control method online.
Background technique
China is maximum wind-power electricity generation market in the world now, and by the end of 2016, China's wind-power electricity generation capacity was accounted for entirely
The 35% of ball wind-power electricity generation capacity.Although the permeability of wind-powered electricity generation is increasingly enhanced, China still suffers from serious wind-force reduction and asks
Topic, especially in northern province.The major obstacle of wind electricity digestion is that the flexibility of electric system is inadequate.However, in northern China
Area, 60% or more generating set are cogeneration of heat and power (CHP) units, and in order to guarantee heating demands, cogeneration units are used
The operational mode of " electricity determining by heat ".The operational mode of cogeneration units " electricity determining by heat " has compressed wind-powered electricity generation online space, aggravation
Wind-abandoning phenomenon.
As the use of new energy receives the extensive attention of people, the grid-connected power generation systems installed capacity such as wind-powered electricity generation is not
Break and increase, it is contemplated that is up to 200,000,000 kilowatts to the year two thousand twenty blower installed capacity.But due to wind power plant and power grid construction difference
, there is wind-abandoning phenomenon in some areas, cause energy waste in the reasons such as step, wind-powered electricity generation characteristic and peak load regulation network ability mismatch
And economic loss.Integrated energy system framework integrate renewable energy be improve renewable energy utilization rate important means it
One.The micro-grid system energized based on natural gas and electric power is typical user's side integrated energy system form, by day in microgrid
Right gas and electric power link are coordinated and optimized, and renewable energy utilization rate can be improved；In addition it is also possible to be sent out in coupled system
The technologies such as gas storage, storage and storage gesture are opened up, the utilization rate of renewable energy is improved, ultimately forms polynary consumption technology and polynary energy storage
Technology reduces wind-abandoning phenomenon.There can be the problems such as high cost since electric power largely stores, and gas storage advantage of lower cost, therefore,
Gas storage technology can be greatly developed in microgrid.It is carried out for example, turning gas technology by electricity and converting natural gas for extra wind-powered electricity generation
Storage reduces abandonment, abandons phenomena such as light.
It is to convert rich electric energy to naturally in load valley, renewable energy power output peak period that electricity, which turns gas technology,
Gas or hydrogen are stored in gas distributing system or natural gas storage equipment；In the electricity shortage period, convert the gas of storage to
Electric energy or thermal energy are supplied to user, to improve microgrid in the ability of load valley period consumption renewable energy.Electricity turns
Gas technology also increases the coupling of electricity-gas joint link, enhances the function between electric power networks and natural gas network system
Stability.
Electricity turns gas and converts electrical energy into chemical energy, is got up by hydrogen or natural gas storage.Turn the final production of gas according to electricity
Object is different, and electricity can be turned to gas technology and be divided into two stages of electrolysis hydrogen and methanation.Firstly, extra electric energy is passed through electrolysis water
Generate hydrogen, extra electric energy electrolysis water is produced hydrogen by energy, be directly used in industrial production or under security constraint into
Row fuel gas generation, chemical equation are as follows:
2H2O→2H2+O2 (1)
The hydrogen that electrolysis generates can be utilized directly, but since hydrogen stores and transmits difficulty, it is general using electrolysis day
The form of right gas, namely for methane.Natural gas has higher unit energy density compared with hydrogen, and can be directly injected into existing natural
Gas network carries out Mass storage and remote transmission.It is to utilize carbon dioxide on the basis of being electrolysed hydrogen that electricity, which turns natural gas,
It is reacted under high temperature and high pressure environment with hydrogen and generates methane, chemical equation are as follows:
CO2+4H2→CH4+2H2O (2)
Methanation is an exothermic catalytic reaction, and the carbon dioxide for reacting required can be in industrial processes
Exhaust gas, combustion of fossil fuel power generation, biomass and air of generation etc..Natural gas network can be injected after natural gas after methanation
Storage, natural gas are typically stored in discarded oil gas field, water-bearing layer or salt cave.Natural gas storage capacity is huge, up to several hundred million
Cubic meter is equivalent to storage electric energy and reaches TWh rank.Electric load peak period will be natural by fuel cell or gas turbine
Gas is converted into electric energy, and so as to form electricity-gas-electricity circulation energy-storage system, traditional energy storage device electricity turns that gas memory capacity is small, puts
The electric time is short, can not effectively dissolve large-scale wind-powered electricity generation, and cannot achieve the long-time of energy, a wide range of space-time translation；Tradition
Energy storage device be all single time section optimization, cause regulation lack flexibility；
Summary of the invention
It is a kind of based on electric conversion storage the technical problem to be solved by the present invention is in view of the above shortcomings of the prior art, provide
Can electrical association system and regulate and control method online, gas equipment, gas turbine, gas cogeneration unit, combustion gas are turned by electricity
Orderly cooperation between boiler and air accumulator enhances the flexibility of electrical association system operation.
In order to solve the above technical problems, the technical solution used in the present invention is:
On the one hand, the present invention provides a kind of electrical association system based on electric conversion energy storage, including energy source information is adopted
Collect unit, energy conversion unit and load cell；
The load cell includes electric load unit and thermic load unit, the electricity consumption that the electric load unit is used for as load
Equipment provides electric load, and the thermic load unit user for load provide thermal energy；
The energy source information acquisition unit includes energy information collector and natural gas bus；Energy information collector point
It is not connected with Wind turbines, power grid and energy conversion unit, the natural gas bus is connected with natural gas network；
The energy conversion unit include: electricity turn gas equipment, gas turbine, gas cogeneration unit, gas fired-boiler and
Air accumulator；The input terminal that the electricity turns gas equipment is connected with goddess of lightning's line, and goddess of lightning's line is connected with electric load unit；The electricity turns
The output end of gas equipment is connected with the input terminal of air accumulator；The output end of the air accumulator is connected with the input terminal of gas turbine
It connects；The output end of the gas turbine is connected with goddess of lightning's line；Energy information collector respectively with gas cogeneration unit and
Gas fired-boiler is connected；The input terminal of the gas fired-boiler is connected with natural gas bus；The output end of the gas fired-boiler with
Thermic load unit is connected；The input terminal of the gas cogeneration unit is connected with natural gas bus；The combustion gas thermoelectricity connection
The output end for producing unit is connected with the input terminal of thermic load unit and goddess of lightning's line respectively；
On the other hand, the present invention provides a kind of online regulation method based on electric conversion energy storage, passes through described one kind
Electrical association system based on electric conversion energy storage is realized, comprising the following steps:
Step 1: using 1 hour as one scheduling slot, using 24 scheduling slots as one dispatching cycle T, obtain electricity
Air accumulator air pressure in the energy source information of present period t that gas association system energy information collector obtains, energy conversion unit
PSWith the information on load of present period t in load cell；The energy source packet includes the gas consumption function of gas cogeneration unit
Rate Pgas,CHPWith the gas consumption power P of gas fired-boilergas,GB, Wind turbines power output PF, to power grid purchase of electricity Pgrid；The information on load
Including electric load PEWith thermic load PH；
Step 2: to the Wind turbines power output P of present period t in energy source information acquisition device in electrical association systemFWith it is negative
The electric load P of present period t in lotus unitEWith thermic load PHVariable quantity be monitored, judge whether electrical association system occurs
Energy updates, if so, 3 are thened follow the steps, if otherwise maintaining original operating status and executing step 1；
Wherein, trigger energy more news includes:
1) variable quantity of Wind turbines power output is more than threshold epsilon PF(t-1): | PF-PF(t-1)|>εPF(t-1)；
2) variable quantity of load cell energy requirement is more than threshold tau L(t-1): | L-L(t-1)|>τL(t-1)；
In formula, L=PE+PH, ε, τ are parameter, and value is the modification scope up and down generated according to actual load condition；
T-1 indicated a upper period, and t indicates present period；
Step 3: when energy, which occurs, for electrical association system updates, using the online regulating strategy of electric conversion energy storage, institute
Stating regulating strategy is then to maintain the statusquo when the supply of gas cogeneration unit can satisfy system requirements, gas cogeneration machine
Group supply preferentially uses gas cogeneration unit to meet the needs of thermic load, gas fired-boiler conduct when not being able to satisfy system requirements
Standby heat source, electricity are reallocated according to User Priority principle；Then judge whether electric load meets system requirements；If full
Foot and electric energy are superfluous, then system turns device of air using electricity, convert natural gas for extra wind power output, and by natural gas storage
In air accumulator；If not satisfied, then electricity turns the deflation of device of air air accumulator, electric energy supply is converted for natural gas using gas turbine
System electric load or to power grid power purchase Pgrid；
Step 4: judging whether electrical association system present period t is less than T dispatching cycle, if t < T, this scheduling slot
Terminate, after enabling t=t+1, executes step 1；If t=T, terminate the scheduling in this period.
The step 3 includes the following steps:
Step 3.1: preferentially meeting the needs of thermic load using gas cogeneration unit, gas fired-boiler is as spare warm
Source；
Judge thermic load P in electrical association systemHWhether system requirements are met by the supply of gas cogeneration unit, wherein
Determine the mark for meeting thermal load demands are as follows:
In formula, WLIt indicates to meet thermal load demands, W when=1LFoot thermal load demands with thumb down when=0；PCHP,hFor combustion gas
The heat production power of cogeneration units；Wherein, the heat production power of gas cogeneration unit are as follows:
PCHP,h=ηCHP,hPgas,CHP
In formula, ηCHP,hIndicate the thermal conversion efficiency of gas cogeneration unit；Pgas,CHPIndicate gas cogeneration unit
Gas consumption power；
If WLWhen=1, i.e. gas cogeneration unit supply can satisfy system requirements, and boiler does not start work, maintain
Work on hand state；
If WLWhen=0, i.e. gas cogeneration unit supply is not able to satisfy system requirements, and gas fired-boiler is as combustion gas thermoelectricity
The stand-by heat of coproduction unit starts, and meets thermal load demands with the associated working of gas cogeneration unit:
PCHP,h+PGB,h≥PH；
Wherein, the heat production power of gas fired-boiler:
PGB,h=ηGBPgas,GB
In formula, PGB,hFor the heat production power of gas fired-boiler；ηGBIndicate gas fired-boiler efficiency；Pgas,GBIndicate gas fired-boiler
Gas consumption power；
Step 3.2: according to present period Wind turbines power output PF, gas cogeneration unit electricity power output PCHPAnd electric load
PE, judge whether t period electric load meets system requirements；System meets the mark of electrical load requirement:
In formula, UtIndicate that electric energy is superfluous when=1, UtIndicate that electric energy is insufficient when=0；
Wherein, the generated output of gas cogeneration unit are as follows:
PCHP=ηCHPPgas,CHP
In formula, ηCHPIndicate the photoelectric transformation efficiency of gas cogeneration unit.
If UtWhen=1, i.e., t period electric load can satisfy system requirements, and electric energy is superfluous, then carries out step 3.3, such as
Fruit UtWhen=0, i.e. t period electric load is not able to satisfy system requirements, then gos to step 3.4；
Step 3.3: if generated energy is excessive, still being had a margin after meeting basic electric load, system turns device of air using electricity, will be more
Remaining wind power output is converted into natural gas, and by natural gas storage in air accumulator, judges that electricity turns the storage of gas equipment air accumulator and holds
Whether amount meets gas storage condition:
In formula, VtIndicating when=1 can be with gas storage, VtBeing expressed as when=0 cannot gas storage；SsIt is current to turn gas air accumulator for electricity
The memory capacity of scheduling slot, Ss,minTurn minimum memory size in gas air accumulator, S for electricitys,maxTurn maximum in gas air accumulator for electricity
Memory capacity.
Electricity turns the memory capacity of gas equipment air accumulator are as follows:
△ P=PS-P0
In formula, K is air accumulator inner compressor unit time air consumption；PaTurn the height above sea level that gas air accumulator installs location for electricity
The atmospheric pressure of height；△ P is that current scheduling period electricity turns gas air accumulator air pressure PSWith minimum submitting air pressure P0Variable quantity；KLFor
Electricity turns gas gas storage pressure inside the tank comprehensive parameters in the current scheduling period；Q is that electricity turns gas air accumulator output gas in the current scheduling period
Flow；
Work as VtWhen=0, i.e. electricity turns gas equipment air accumulator memory capacity and is unsatisfactory for gas storage condition, then gos to step 4；If
VtWhen=1, indicate that electricity turns gas gas storage tankage size and meets gas storage condition, then the natural gas storage converted extra wind-powered electricity generation is in gas storage
In tank, 3.5 are then gone to step；
Wherein, electricity turns the electric energy of gas equipment consumption are as follows:
In formula, PP2GIndicate that electricity turns the power consumption of gas equipment；HgIndicate the calorific value of natural gas；ηP2GIndicate that electricity turns gas equipment
Transfer efficiency；
Step 3.4:: if t period electric load is unable to satisfy system-based electrical load requirement, judge that electricity turns device of air gas storage
Whether tank memory capacity meets deflation condition；If so, electricity turns the deflation of device of air air accumulator, natural gas is turned using gas turbine
Electric energy feed system electric load is turned to, then gos to step 3.5；If it is not, then to power grid power purchase Pgrid；
The deflation condition are as follows:
In formula, XtIt indicates to deflate when=1, XtIt is expressed as to deflate when=0；
Wherein, to power grid purchase of electricity when air accumulator cannot deflate:
Pgrid=PE-PCHP-PF
In formula, PgridIndicate purchase of electricity when air accumulator cannot deflate to power grid；
The generated output of gas turbine:
PGT=ηGTQHg
In formula, PGTIndicate the generated output of gas turbine；ηGTIndicate the transfer efficiency of gas turbine；
Step 3.5: judge whether present period t reaches electric energy balance state:
In formula, if YtWhen=1, that is, reach electric energy balance state, then gos to step 4；If YtWhen=0, i.e., it can not reach
To electric energy balance state, then to power grid power purchase Pgrid, return step 4 after electric energy balance；
Wherein, to power grid purchase of electricity when electric energy is in equilibrium state:
Pgrid=PE-PCHP-PF-PGT
In formula, PgridTo power grid purchase of electricity when being expressed as reaching electric energy balance.
The beneficial effects of adopting the technical scheme are that provided by the invention a kind of based on electric conversion energy storage
Electrical association system and regulate and control method online, this system carries out blocking processing to electricity-gas association system, makes it easy to control
With the online regulating strategy of execution, in order to stabilize the fluctuation of wind power output, workload demand, the invention proposes online regulation plans
Slightly, which utilizes electricity to turn gas equipment and improves electricity-gas interconnection integrated energy system wind electricity digestion capability, while low in electric load
Paddy and wind power output peak period can effectively slow down the fluctuation of load；Turning gas equipment and gas turbine by electricity realizes electricity
Bi-directional energy flow between power network and natural gas network enhances the coupling of electricity-gas network, improves efficiency of energy utilization to mention
The high stability of system.Energy is allocated by the online regulating strategy that electric-gas converts energy storage, there is system good
Flexible regulating and controlling effect.The more traditional energy storage device of this method, electricity turn that gas memory capacity is big, discharge time is long, can effectively disappear
It receives and large-scale wind power and realizes the long-time of energy, a wide range of space-time translation；Gas turbine group and electricity, which turn gas technology, realizes electricity
Bi-directional energy flow between power network and natural gas network enhances the coupling of electricity-gas network, improves efficiency of energy utilization to mention
High system stability；
Detailed description of the invention
Fig. 1 is the electrical association system structure chart of electric conversion energy storage provided in an embodiment of the present invention；
Fig. 2 is the online regulation method flow diagram of electric conversion energy storage provided in an embodiment of the present invention；
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
The method of the present embodiment is as described below.
On the one hand, the present invention provides a kind of electrical association system based on electric conversion energy storage, as shown in Figure 1, including energy
Measure source information acquisition unit, energy conversion unit and load cell；
The load cell includes electric load unit and thermic load unit, the electricity consumption that the electric load unit is used for as load
Equipment provides electric load, and the thermic load unit is used to provide thermal energy for the user of load；
The energy source information acquisition unit is for acquiring on Wind turbines output client information, power grid and natural gas bus
Information；Including energy information collector and natural gas bus；Energy information collector respectively with Wind turbines, power grid and energy
Converting unit is connected, and the natural gas bus is connected with natural gas network；
The energy conversion unit include: electricity turn gas equipment (P2G), gas turbine, gas cogeneration unit (CHP),
Gas fired-boiler and air accumulator；The input terminal that the electricity turns gas equipment is connected with goddess of lightning's line, and goddess of lightning's line is connected with electric load unit
It connects；The electricity turns the output end of gas equipment and is connected with the input terminal of air accumulator；The output end and gas turbine of the air accumulator
Input terminal be connected；The output end of the gas turbine is connected with goddess of lightning's line；Energy information collector is warm with combustion gas respectively
Electricity Federation produces unit and is connected with gas fired-boiler；The input terminal of the gas fired-boiler is connected with natural gas bus；The gas-fired boiler
The output end of furnace is connected with thermic load unit；The input terminal of the gas cogeneration unit is connected with natural gas bus；Institute
The output end for stating gas cogeneration unit is connected with the input terminal of thermic load unit and goddess of lightning's line respectively；
The energy conversion unit, as the energy hinge of electrical association system, meter and electricity turn gas equipment and combustion gas wheel
Two kinds of coupled modes of machine.By monitoring present period air accumulator air pressure PS, to determine the operating status of air accumulator.Electricity turns gas will be more
Remaining wind-powered electricity generation is converted into natural gas, injects in air accumulator and stores.On the contrary, gas turbine passes through natural gas in consumption air accumulator, it will
The electric energy of acquisition is pooled on goddess of lightning's line, realizes bi-directional energy flow between electric power networks and natural gas network.
On the other hand, the present invention provides a kind of based on the online regulation method of electricity-gas shift energy storage, passes through described one kind
Electrical association system realization based on electric conversion energy storage, as shown in Figure 2, comprising the following steps:
Step 1: using 1 hour as one scheduling slot, using 24 scheduling slots as one dispatching cycle T, obtain electricity-
Air accumulator air pressure P in the energy source information, energy conversion unit of present period t in gas association system energy source information acquisition deviceS
With the information on load of present period t in load cell；The energy source packet includes the gas consumption power of gas cogeneration unit
Pgas,CHPWith the gas consumption power P of gas fired-boilergas,GB, Wind turbines power output PF, to power grid purchase of electricity Pgrid；The information on load packet
Include electric load PEWith thermic load PH；
Step 2: to the Wind turbines power output P of present period t in energy source information acquisition device in electricity-gas association systemFWith
The electric load P of present period t in load cellEWith thermic load PHVariable quantity be monitored, whether judge electricity-gas association system
Energy occurs to update, if so, 3 are thened follow the steps, if otherwise maintaining original operating status and executing step 1；
Wherein, trigger energy more news includes:
1) variable quantity of Wind turbines power output is more than certain threshold value: | PF-PF(t-1)|>εPF(t-1)；
2) variable quantity of load cell energy requirement is more than certain threshold value: | L-L(t-1)|>τL(t-1)；
In formula, L=PE+PH, ε, τ are parameter, and the value of ε, τ are the upper down regulation models generated according to actual load condition
It encloses；T-1 indicated a upper period, and t indicates present period；L(t-1)=PE(t-1)+PH(t-1)；
Step 3: when energy, which occurs, for electricity-gas association system updates, using a kind of based on the online tune of electricity-gas shift energy storage
Control strategy, the regulating strategy are then to maintain the statusquo when the supply of gas cogeneration unit can satisfy system requirements, combustion gas
Cogeneration units supply preferentially uses gas cogeneration unit to meet the needs of thermic load when not being able to satisfy system requirements, fires
Gas boiler is reallocated as standby heat source, electricity according to User Priority principle；Then judging whether electric load meets is
System demand；If meeting and electric energy being superfluous, system turns device of air using electricity, converts natural gas for extra wind power output, and
By natural gas storage in air accumulator；If not satisfied, then electricity turns the deflation of device of air air accumulator, natural gas is turned using gas turbine
Turn to electric energy feed system electric load or to power grid power purchase Pgrid；Specific step is as follows:
Step 3.1: due in thermic load and electric load fixed part all have can not control, preferentially use combustion gas thermoelectricity
Coproduction unit meets the needs of thermic load, and gas fired-boiler is as standby heat source；
Judge thermic load P in electricity-gas association systemHWhether system requirements are met by the supply of gas cogeneration unit,
Middle determination meets the mark of thermal load demands are as follows:
In formula, WLIt indicates to meet thermal load demands, W when=1LFoot thermal load demands with thumb down when=0；PCHP,hFor combustion gas
The heat production power of cogeneration units；Wherein, the heat production power of gas cogeneration unit are as follows:
PCHP,h=ηCHP,hPgas,CHP
In formula, ηCHP,hIndicate the thermal conversion efficiency of gas cogeneration unit；Pgas,CHPIndicate gas cogeneration unit
Gas consumption power；
If WLWhen=1, i.e. gas cogeneration unit supply can satisfy system requirements, and boiler does not start work, maintain
Work on hand state；
If WLWhen=0, i.e. gas cogeneration unit supply is not able to satisfy system requirements, and gas fired-boiler is as combustion gas thermoelectricity
The stand-by heat of coproduction unit starts, and meets thermal load demands with the associated working of gas cogeneration unit:
PCHP,h+PGB,h≥PH；
Wherein, the heat production power of gas fired-boiler:
PGB,h=ηGBPgas,GB
In formula, PGB,hFor the heat production power of gas fired-boiler；ηGBIndicate gas fired-boiler efficiency；Pgas,GBIndicate gas fired-boiler
Gas consumption power；
Step 3.2: according to present period Wind turbines power output PF, gas cogeneration unit electricity power output PCHPAnd electric load
PE, judge whether t period electric load meets system requirements；System meets the mark of electrical load requirement:
In formula, UtIndicate that electric energy is superfluous when=1, UtIndicate that electric energy is insufficient when=0；
Wherein, the generated output of gas cogeneration unit are as follows:
PCHP=ηCHPPgas,CHP
In formula, ηCHPIndicate the photoelectric transformation efficiency of gas cogeneration unit.
If UtWhen=1, i.e., t period electric load can satisfy system requirements, and electric energy is superfluous, then carries out step 3.3, such as
Fruit UtWhen=0, i.e. t period electric load is not able to satisfy system requirements, then gos to step 3.4；
Step 3.3: if generated energy is excessive, still being had a margin after meeting basic electric load, system turns device of air using electricity, will be more
Remaining wind power output is converted into natural gas, and by natural gas storage in air accumulator, judges that electricity turns the storage of gas equipment air accumulator and holds
Whether amount meets gas storage condition:
In formula, VtIndicating when=1 can be with gas storage, VtBeing expressed as when=0 cannot gas storage；SsIt is current to turn gas air accumulator for electricity
The memory capacity of scheduling slot, Ss,minTurn minimum memory size in gas air accumulator, S for electricitys,maxTurn maximum in gas air accumulator for electricity
Memory capacity.
Electricity turns the memory capacity of gas equipment air accumulator are as follows:
△ P=PS-P0
In formula, K is air accumulator inner compressor unit time air consumption；PaTurn the height above sea level that gas air accumulator installs location for electricity
The atmospheric pressure of height；△ P is that current scheduling period electricity turns gas air accumulator air pressure PSWith minimum submitting air pressure P0Variable quantity；KLFor
Electricity turns gas gas storage pressure inside the tank comprehensive parameters in the current scheduling period；Q is that electricity turns gas air accumulator output gas in the current scheduling period
Flow；
Work as VtWhen=0, i.e. electricity turns gas equipment air accumulator memory capacity and is unsatisfactory for gas storage condition, then gos to step 4；If
VtWhen=1, indicate that electricity turns gas gas storage tankage size and meets gas storage condition, then the natural gas storage converted extra wind-powered electricity generation is in gas storage
In tank, 3.5 are then gone to step；
Wherein, electricity turns the electric energy of gas equipment consumption are as follows:
In formula, PP2GIndicate that electricity turns the power consumption of gas equipment；HgIndicate the calorific value of natural gas；ηP2GIndicate that electricity turns gas equipment
Transfer efficiency；
Step 3.4:: if t period electric load is unable to satisfy system-based electrical load requirement, judge that electricity turns device of air gas storage
Whether tank memory capacity meets deflation condition；If so, electricity turns the deflation of device of air air accumulator, natural gas is turned using gas turbine
Electric energy feed system electric load is turned to, then gos to step 3.5；If it is not, then to power grid power purchase Pgrid；
The deflation condition are as follows:
In formula, XtIt indicates to deflate when=1, XtIt is expressed as to deflate when=0；
Wherein, to power grid purchase of electricity when air accumulator cannot deflate:
Pgrid=PE-PCHP-PF
In formula, PgridIndicate purchase of electricity when air accumulator cannot deflate to power grid；
The generated output of gas turbine:
PGT=ηGTQHg
In formula, PGTIndicate the generated output of gas turbine；ηGTIndicate the transfer efficiency of gas turbine；
Step 3.5: judge whether present period t reaches electric energy balance state:
In formula, if YtWhen=1, that is, reach electric energy balance state, then gos to step 4；If YtWhen=0, i.e., it can not reach
To electric energy balance state, then to power grid power purchase Pgrid, return step 4 after electric energy balance；
Wherein, to power grid purchase of electricity when electric energy is in equilibrium state:
Pgrid=PE-PCHP-PF-PGT
In formula, PgridTo power grid purchase of electricity when being expressed as reaching electric energy balance.
Step 4: judging whether electricity-gas association system present period t is less than T dispatching cycle, if t < T, when this scheduling
Section terminates, and after enabling t=t+1, executes step 1；If t=T, terminate the scheduling in this period.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify to technical solution documented by previous embodiment, or some or all of the technical features are equal
Replacement；And these are modified or replaceed, model defined by the claims in the present invention that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (3)
1. a kind of electrical association system based on electric conversion energy storage, it is characterised in that: including energy source information acquisition unit, energy
Measure converting unit and load cell；
The load cell includes electric load unit and thermic load unit, the electrical equipment that the electric load unit is used for as load
Electric load is provided, the thermic load unit user for load provide thermal energy；
The energy source information acquisition unit includes energy information collector and natural gas bus；Energy information collector respectively with
Wind turbines, power grid and energy conversion unit are connected, and the natural gas bus is connected with natural gas network；
The energy conversion unit includes: that electricity turns gas equipment, gas turbine, gas cogeneration unit, gas fired-boiler and gas storage
Tank；The input terminal that the electricity turns gas equipment is connected with goddess of lightning's line, and goddess of lightning's line is connected with electric load unit；The electricity turns gas and sets
Standby output end is connected with the input terminal of air accumulator；The output end of the air accumulator is connected with the input terminal of gas turbine；
The output end of the gas turbine is connected with goddess of lightning's line；Energy information collector respectively with gas cogeneration unit and combustion gas
Boiler is connected；The input terminal of the gas fired-boiler is connected with natural gas bus；The output end and heat of the gas fired-boiler are negative
Lotus unit is connected；The input terminal of the gas cogeneration unit is connected with natural gas bus；The gas cogeneration machine
The output end of group is connected with the input terminal of thermic load unit and goddess of lightning's line respectively.
2. a kind of online regulation method based on electric conversion energy storage, by described in claim 1 a kind of based on electric conversion
The electrical association system of energy storage is realized, it is characterised in that: the following steps are included:
Step 1: using 1 hour as one scheduling slot, using 24 scheduling slots as one dispatching cycle T, obtain electrical connection
Collaboration is united the energy source information of present period t that energy information collector obtains, air accumulator air pressure P in energy conversion unitSWith
The information on load of present period t in load cell；The energy source packet includes the gas consumption power of gas cogeneration unit
Pgas,CHPWith the gas consumption power P of gas fired-boilergas,GB, Wind turbines power output PF, to power grid purchase of electricity Pgrid；The information on load packet
Include electric load PEWith thermic load PH；
Step 2: to the Wind turbines power output P of present period t in energy source information acquisition device in electrical association systemFWith load list
The electric load P of present period t in memberEWith thermic load PHVariable quantity be monitored, judge whether electrical association system occurs energy
It updates, if so, 3 are thened follow the steps, if otherwise maintaining original operating status and executing step 1；
Wherein, trigger energy more news includes:
1) variable quantity of Wind turbines power output is more than threshold epsilon PF(t-1): | PF-PF(t-1)|>εPF(t-1)；
2) variable quantity of load cell energy requirement is more than threshold tau L(t-1): | L-L(t-1)|>τL(t-1)；
In formula, L=PE+PH, ε, τ are parameter, and value is the modification scope up and down generated according to actual load condition；T-1 table
Show a period, t indicates present period；
Step 3: when energy, which occurs, for electrical association system updates, using the online regulating strategy of electric conversion energy storage, the tune
Then to maintain the statusquo when the supply of gas cogeneration unit can satisfy system requirements, gas cogeneration unit supplies control strategy
Gas cogeneration unit is preferentially used to meet the needs of thermic load when should not be able to satisfy system requirements, gas fired-boiler is as spare
Heat source, electricity are reallocated according to User Priority principle；Then judge whether electric load meets system requirements；If meet and
Electric energy is superfluous, then system turns device of air using electricity, converts natural gas for extra wind power output, and natural gas storage is being stored up
In gas tank；If not satisfied, then electricity turns the deflation of device of air air accumulator, electric energy feed system is converted for natural gas using gas turbine
Electric load or to power grid power purchase Pgrid；
Step 4: judge whether electrical association system present period t is less than T dispatching cycle, if t < T, this scheduling slot knot
Beam after enabling t=t+1, executes step 1；If t=T, terminate the scheduling in this period.
3. a kind of online regulation method based on electric conversion energy storage according to claim 2, it is characterised in that: the step
Rapid 3 include the following steps:
Step 3.1: preferentially meeting the needs of thermic load using gas cogeneration unit, gas fired-boiler is as standby heat source；
Judge thermic load P in electrical association systemHWhether system requirements are met by the supply of gas cogeneration unit, wherein determining
Meet the mark of thermal load demands are as follows:
In formula, WLIt indicates to meet thermal load demands, W when=1LFoot thermal load demands with thumb down when=0；PCHP,hFor combustion gas thermoelectricity
The heat production power of coproduction unit；Wherein, the heat production power of gas cogeneration unit are as follows:
PCHP,h=ηCHP,hPgas,CHP
In formula, ηCHP,hIndicate the thermal conversion efficiency of gas cogeneration unit；Pgas,CHPIndicate the consumption of gas cogeneration unit
Qigong rate；
If WLWhen=1, i.e. gas cogeneration unit supply can satisfy system requirements, and boiler does not start work, maintains existing work
Make state；
If WLWhen=0, i.e. gas cogeneration unit supply is not able to satisfy system requirements, and gas fired-boiler is as gas cogeneration
The stand-by heat of unit starts, and meets thermal load demands with the associated working of gas cogeneration unit:
PCHP,h+PGB,h≥PH；
Wherein, the heat production power of gas fired-boiler:
PGB,h=ηGBPgas,GB
In formula, PGB,hFor the heat production power of gas fired-boiler；ηGBIndicate gas fired-boiler efficiency；Pgas,GBIndicate the gas consumption of gas fired-boiler
Power；
Step 3.2: according to present period Wind turbines power output PF, gas cogeneration unit electricity power output PCHPWith electric load PE, sentence
Whether disconnected t period electric load meets system requirements；System meets the mark of electrical load requirement:
In formula, UtIndicate that electric energy is superfluous when=1, UtIndicate that electric energy is insufficient when=0；
Wherein, the generated output of gas cogeneration unit are as follows:
PCHP=ηCHPPgas,CHP
In formula, ηCHPIndicate the photoelectric transformation efficiency of gas cogeneration unit；
If UtWhen=1, i.e., t period electric load can satisfy system requirements, and electric energy is superfluous, then step 3.3 is carried out, if Ut
When=0, i.e. t period electric load is not able to satisfy system requirements, then gos to step 3.4；
Step 3.3: if generated energy is excessive, still being had a margin after meeting basic electric load, system turns device of air using electricity, will be extra
Wind power output is converted into natural gas, and by natural gas storage in air accumulator, judges that electricity turns gas equipment air accumulator memory capacity and is
It is no to meet gas storage condition:
In formula, VtIndicating when=1 can be with gas storage, VtBeing expressed as when=0 cannot gas storage；SsTurn gas air accumulator current scheduling for electricity
The memory capacity of period, Ss,minTurn minimum memory size in gas air accumulator, S for electricitys,maxTurn maximum storage in gas air accumulator for electricity
Capacity；
Electricity turns the memory capacity of gas equipment air accumulator are as follows:
△ P=PS-P0
In formula, K is air accumulator inner compressor unit time air consumption；PaTurn the height above sea level that gas air accumulator installs location for electricity
Atmospheric pressure；△ P is that current scheduling period electricity turns gas air accumulator air pressure PSWith minimum submitting air pressure P0Variable quantity；KLIt is current
Electricity turns gas gas storage pressure inside the tank comprehensive parameters in scheduling slot；Q is that electricity turns gas air accumulator output gas flow amount in the current scheduling period；
Work as VtWhen=0, i.e. electricity turns gas equipment air accumulator memory capacity and is unsatisfactory for gas storage condition, then gos to step 4；If Vt=1
When, indicate that electricity turns gas gas storage tankage size and meets gas storage condition, then by the natural gas storage of extra wind-powered electricity generation conversion in air accumulator,
Then 3.5 are gone to step；
Wherein, electricity turns the electric energy of gas equipment consumption are as follows:
In formula, PP2GIndicate that electricity turns the power consumption of gas equipment；HgIndicate the calorific value of natural gas；ηP2GIndicate that electricity turns turning for gas equipment
Change efficiency；
Step 3.4:: if t period electric load is unable to satisfy system-based electrical load requirement, judge that electricity turns device of air air accumulator and deposits
Whether storage capacity meets deflation condition；If so, electricity turns the deflation of device of air air accumulator, converted natural gas to using gas turbine
Electric energy feed system electric load, then gos to step 3.5；If it is not, then to power grid power purchase Pgrid；
The deflation condition are as follows:
In formula, XtIt indicates to deflate when=1, XtIt is expressed as to deflate when=0；
Wherein, to power grid purchase of electricity when air accumulator cannot deflate:
Pgrid=PE-PCHP-PF
In formula, PgridIndicate purchase of electricity when air accumulator cannot deflate to power grid；
The generated output of gas turbine:
PGT=ηGTQHg
In formula, PGTIndicate the generated output of gas turbine；ηGTIndicate the transfer efficiency of gas turbine；
Step 3.5: judge whether present period t reaches electric energy balance state:
In formula, if YtWhen=1, that is, reach electric energy balance state, then gos to step 4；If YtWhen=0, that is, it is unable to reach electricity
Energy equilibrium state, then to power grid power purchase Pgrid, return step 4 after electric energy balance；
Wherein, to power grid purchase of electricity when electric energy is in equilibrium state:
Pgrid=PE-PCHP-PF-PGT
In formula, PgridTo power grid purchase of electricity when being expressed as reaching electric energy balance.
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