CN110061499A - The operation method of grid type micro-capacitance sensor under a kind of differentiation power supply electricity price - Google Patents
The operation method of grid type micro-capacitance sensor under a kind of differentiation power supply electricity price Download PDFInfo
- Publication number
- CN110061499A CN110061499A CN201910453597.8A CN201910453597A CN110061499A CN 110061499 A CN110061499 A CN 110061499A CN 201910453597 A CN201910453597 A CN 201910453597A CN 110061499 A CN110061499 A CN 110061499A
- Authority
- CN
- China
- Prior art keywords
- electricity
- moment
- power
- energy
- cost
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/008—Circuit arrangements for ac mains or ac distribution networks involving trading of energy or energy transmission rights
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The invention discloses a kind of operation methods of grid type micro-capacitance sensor under differentiation power supply electricity price, comprising the following steps: (1) determines the electricity price of current t moment, then can calculating cogeneration cooling heating system get a profit；(2) in the case where cogeneration cooling heating system cannot get a profit, compare the size that the sum of workload demand and cold and hot electricity demanding are contributed with photovoltaic, if it is greater than or equal to the electric discharge of, energy-storage battery or from bulk power grid power purchase；If being less than, charge to energy-storage battery or to bulk power grid sale of electricity；(3) in the case where cogeneration cooling heating system can get a profit, compare the size of the sum of workload demand and photovoltaic power output and cogeneration, principle is identical as step (2).The present invention analyzes grid entry point aggregate load characteristic, the power output strategy and state change approach under all kinds of power supply different scenes are obtained, optimal operation model is established on this basis, is analyzed the power output feature of grid type micro-capacitance sensor, is laid the foundation for the planning and design of the micro-capacitance sensor containing grid type.
Description
Technical field
The invention belongs to operation and control of electric power system fields, and in particular to grid type under a kind of differentiation power supply electricity price
The operation method of micro-capacitance sensor.
Background technique
Micro-capacitance sensor is a kind of small-sized electric system by organic combinations such as renewable energy, load, energy storage devices, can
To improve the utilization rate of distributed energy, realizes effective distributed energy scheduling, it is grid-connected to be increasingly becoming solution distributed generation resource
The main means of problem.Grid type micro-capacitance sensor reduces compared with isolated island type micro-capacitance sensor as the micro-capacitance sensor form mainly promoted
Microgrid is to autonomous requirement, to save construction and operating cost, has certain feasibility in China at this stage.
Grid entry point aggregate load characteristic is variation of the microgrid according to external Price Mechanisms, load and renewable energy, optimization
Regulation net in controllable energy source formed exchange power with power distribution network.Since the grid type micro-capacitance sensor most of the time is incorporated into the power networks,
It is very high to power grid degree of dependence, while two-way uncertainty is presented in its grid entry point aggregate load characteristic, it also will be to operation of power networks one
Fixing is rung.Therefore, micro-capacitance sensor operation reserve and grid entry point aggregate load characteristic under existing policies and mechanisms are studied, to matching at this stage
Planning, operation and the adjustment of future market mechanism of power grid are of great significance.
Business type micro-grid load characteristic has the rule of apparent peak daytime, paddy night, this is because when office staff works
Between caused by, electricity consumption is concentrated mainly on the work peak period in in afternoon in the morning, and distributed energy type is most, typically includes light
Volt, energy-storage battery and cogeneration, load are mainly the power loads such as illumination, air-conditioning, power.Research is assumed micro- at present
Economical operation and market price bidding both of which are presented in net, it is assumed that purchase sale of electricity valence has been interacted with power grid, with the letter of external electricity price
Breath carries out internal regulation and transaction.However, Current Domestic market mechanism is also unsound, rate for incorporation into the power network is according to all kinds of power supply lists
It solely appraises and decides, there is no micro-capacitance sensor total rate of electricity, therefore study all kinds of power supplys power generations and optimization in a kind of business type grid type micro-capacitance sensor
Dispatching method is of great significance.
Summary of the invention
To overcome drawbacks described above, the purpose of the present invention is to provide grid type micro-capacitance sensors under a kind of differentiation power supply electricity price
Operation method.
To achieve the above object, the present invention adopts the following technical scheme:
The operation method of grid type micro-capacitance sensor under a kind of differentiation power supply electricity price, comprising the following steps:
(1) electricity price of current t moment is determined, then can calculating cogeneration cooling heating system get a profit, cold if cannot get a profit
Co-generation unit is equivalent to electrical equipment, then uses electric refrigerating machine and electric boiler, otherwise cogeneration cooling heating system is equivalent to hair
Electric equipment uses cogeneration cooling heating system；
(2) in the case where cogeneration cooling heating system cannot get a profit, compare the sum of workload demand and cold and hot electricity demanding and light
The size for lying prostrate power output is contributed if it is greater than or equal to photovoltaic, then supply falls short of demand at this time, and energy-storage battery discharges (power output) or from bulk power grid
Power purchase；It contributes if being less than photovoltaic, supply exceed demand at this time, charges to energy-storage battery or to bulk power grid sale of electricity；
(3) in the case where cogeneration cooling heating system can get a profit, compare workload demand and photovoltaic power output and cold and hot Electricity Federation
The size of the sum of production, if workload demand is more than or equal to the sum of photovoltaic power output and cogeneration, supply falls short of demand at this time, energy storage
Battery discharge (power output) supplies at this time from bulk power grid power purchase if workload demand is less than the sum of photovoltaic power output and cogeneration
Greater than asking, charge to energy-storage battery or to bulk power grid sale of electricity.
Preferably, the calculation formula that can step (1) cogeneration cooling heating system get a profit are as follows:
Vt GT·λGT-pGT·λt g< (pgheat+pgcool)·λt g,
(Vt GT·λGT–pGT·λt g) indicate that the t period uses the operating cost of gas turbine supply cooling and heating load, (pgheat +
pgcool)·λt gIndicate when t in discontinuity surface by electric boiler heat production and electric refrigerating machine refrigeration generate to be equal to gas turbine cold
The electricity charge that heating capacity produced by cogeneration of heat and power and refrigerating capacity need；When the former is less than the latter, cogeneration cooling heating system profit.
Preferably, step (2) energy-storage battery charge and discharge are considered as energy storage cost and electricity with to the selection that bulk power grid sells power purchase
The relationship of valence, it then follows the low high-incidence principle of storage, while being also contemplated that energy-storage battery state-of-charge SOC state.
Preferably, the high-incidence principle of low storage are as follows: in given time section t, compare the electricity price λ of t moment firstt g
With energy-storage battery unit generated energy cost λESSize, work as λES> λt gWhen, energy-storage battery is meeting charge power constraint condition
Lower charging, otherwise energy-storage battery discharges under conditions of meeting discharge power constraint.
Preferably, the charging upper limit of the energy-storage battery state-of-charge SOC is 80%, and electric discharge lower limit is 20%.
Preferably, when cogeneration cooling heating system cannot make a profit, workload demand and the sum of electric boiler or electric refrigerating machine power consumption are small
When photovoltaic power output, if energy storage remaining capacity does not reach charging limit value, current electricity prices are lower than energy storing and electricity generating cost, then energy-storage battery
It is charged with maximum charge power, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt h-cFor the power that the cogeneration cooling heating system of t moment consumes, pt chmFor the energy-storage battery charge power of t moment, Ct eq
For cost of electricity-generating, λt gFor electricity price of the Utilities Electric Co. in moment t；
Meanwhile energy-storage battery cost of electricity-generating increases to:
λt ESFor t moment energy-storage battery cost of electricity-generating, EtFor the voltage of t moment energy-storage battery, λt gFor t moment Utilities Electric Co.
Electricity price.
Preferably, when cogeneration cooling heating system cannot make a profit, workload demand and the sum of electric boiler or electric refrigerating machine power consumption are small
When photovoltaic power output, if energy storage remaining capacity does not reach charging limit value, current electricity prices are higher than energy storing and electricity generating cost, then energy-storage battery
To charge merely with photovoltaic power generation allowance, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt h-cFor the power that the cogeneration cooling heating system of t moment consumes, pt chmFor the energy-storage battery charge power of t moment, Ct eq
For cost of electricity-generating, λt gFor electricity price of the Utilities Electric Co. in moment t.
Preferably, when cogeneration cannot make a profit, workload demand and the sum of electric boiler or electric refrigerating machine power consumption are less than light
When volt power output, and energy storage remaining capacity has reached when charging limit value, and energy-storage battery does not charge, micro-capacitance sensor external characteristics and cost of electricity-generating
Are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt h-cFor the power that the cogeneration cooling heating system of t moment consumes, Ct eqFor cost of electricity-generating, λt gIt is Utilities Electric Co. in moment t
When electricity price.
Preferably, when cogeneration cooling heating system cannot make a profit, workload demand and the sum of electric boiler or electric refrigerating machine power consumption are big
When being equal to photovoltaic power output, if electricity price when current bulk power grid electricity price is paddy, current time is mostly midnight, if energy storage at this time
Remaining capacity has reached charging limit value, and energy-storage battery is without charging, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt h-cFor the power that the cogeneration of t moment consumes, Ct eqFor cost of electricity-generating, λt gFor Utilities Electric Co. in moment t
Electricity price.
Preferably, when cogeneration cooling heating system cannot make a profit, workload demand and the sum of electric boiler or electric refrigerating machine power consumption are big
When being equal to photovoltaic power output, if electricity price when current bulk power grid electricity price is paddy, if energy storage remaining capacity does not reach charging limit at this time
Value, energy-storage battery charging, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt h-cFor the power that the cogeneration of t moment consumes, pt chmFor the energy-storage battery charge power of t moment, Ct eqFor hair
Electric cost, λt gFor electricity price of the Utilities Electric Co. in moment t.
Meanwhile energy-storage battery cost of electricity-generating increases to:
λt ESFor t moment energy-storage battery cost of electricity-generating, EtFor the voltage of energy-storage battery t moment, λt gFor Utilities Electric Co. when
Carve electricity price when t.
Preferably, when cogeneration cooling heating system cannot make a profit, workload demand and the sum of electric boiler or electric refrigerating machine power consumption are big
When being equal to photovoltaic power output, if electricity price when current bulk power grid electricity price is not paddy, energy storage remaining capacity has reached electric discharge limit value, or storage
Energy remaining capacity does not reach electric discharge limit value and current electric grid electricity price is lower than energy storing and electricity generating cost, and energy storage is not discharged, micro-capacitance sensor external characteristics
With cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt h-cFor the power that the cogeneration of t moment consumes, Ct eqFor cost of electricity-generating, λt gFor Utilities Electric Co. in moment t
Electricity price.
Preferably, when cogeneration cooling heating system cannot make a profit, workload demand and the sum of electric boiler or electric refrigerating machine power consumption are big
When being equal to photovoltaic power output, if electricity price when current bulk power grid electricity price is not paddy, energy storage remaining capacity does not reach electric discharge limit value and current
Power grid electricity price is higher than energy storing and electricity generating cost, energy storage electric discharge, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt h-cFor the power that the cogeneration of t moment consumes, pt dismFor the energy-storage battery discharge power of t moment, Ct eqFor hair
Electric cost, λt gFor electricity price of the Utilities Electric Co. in moment t, λt ESFor t moment energy-storage battery cost of electricity-generating.
Preferably, when cogeneration cooling heating system can make a profit, workload demand is less than the sum of photovoltaic power output and cogeneration
When, if energy storage remaining capacity does not reach charging limit value, current electricity prices are lower than energy storing and electricity generating cost, then energy-storage battery is with maximum charge
Power charges, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt GTIt contributes for the cogeneration of t moment, pt chmFor the energy-storage battery charge power of t moment, Ct eqFor cost of electricity-generating,
λt gFor electricity price of the Utilities Electric Co. in moment t；
Meanwhile energy-storage battery cost of electricity-generating increases to:
λt ESFor t moment energy-storage battery cost of electricity-generating, EtFor the voltage of energy-storage battery t moment, pt chmFor the energy storage of t moment
Battery charge power, λt gFor electricity price of the Utilities Electric Co. in moment t.
Preferably, when cogeneration cooling heating system can make a profit, workload demand is less than the sum of photovoltaic power output and cogeneration
When, if energy storage remaining capacity does not reach charging limit value, current electricity prices are higher than energy storing and electricity generating cost, then energy-storage battery is merely with light
Volt power generation allowance charges, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt GTIt contributes for the cogeneration of t moment, pt chmFor the energy-storage battery charge power of t moment, Ct eqFor cost of electricity-generating,
λt gFor electricity price of the Utilities Electric Co. in moment t, λGTFor unit combustion gas cost, Vt GTNatural gas is consumed for cogeneration cooling heating system
Amount.
Preferably, when cogeneration cooling heating system can make a profit, workload demand is less than the sum of photovoltaic power output and cogeneration
When, and energy storage remaining capacity has reached when charging limit value, energy-storage battery does not charge, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt GTIt contributes for the cogeneration of t moment, Ct eqFor cost of electricity-generating, λt gFor electricity price of the Utilities Electric Co. in moment t,
λGTFor unit combustion gas cost, Vt GTAmount of natural gas is consumed for cogeneration cooling heating system.
Preferably, when cogeneration cooling heating system can make a profit, workload demand is more than or equal to photovoltaic power output and cogeneration
The sum of when, if electricity price when current bulk power grid electricity price is paddy, current time is mostly midnight, if energy storage remaining capacity is at this time
Up to charging limit value, energy-storage battery is without charging, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt GTIt contributes for the cogeneration of t moment, Ct eqFor cost of electricity-generating, λt gFor electricity price of the Utilities Electric Co. in moment t,
λGTFor unit combustion gas cost, Vt GTAmount of natural gas is consumed for cogeneration cooling heating system.
When cogeneration cooling heating system can make a profit, and workload demand is more than or equal to the sum of photovoltaic power output and cogeneration,
If electricity price when current bulk power grid electricity price is paddy, if energy storage remaining capacity does not reach charging limit value at this time, energy-storage battery charging is micro-
Power grid external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt GTIt contributes for the cogeneration of t moment, pt chmFor the energy-storage battery charge power of t moment, Ct eqFor cost of electricity-generating,
λt gFor electricity price of the Utilities Electric Co. in moment t, λGTFor unit combustion gas cost, Vt GTNatural gas is consumed for cogeneration cooling heating system
Amount；
Meanwhile energy-storage battery cost of electricity-generating increases to:
λt ESFor t moment energy-storage battery cost of electricity-generating, EtFor the voltage of energy-storage battery t moment, pt chmFor the energy storage of t moment
Battery charge power, λt gFor electricity price of the Utilities Electric Co. in moment t.
When cogeneration cooling heating system can make a profit, and workload demand is more than or equal to the sum of photovoltaic power output and cogeneration,
Electricity price and energy storage remaining capacity has reached electric discharge limit value or energy storage remaining capacity is not reached and put when if current bulk power grid electricity price is not paddy
Electric limit value and current electric grid electricity price are lower than energy storing and electricity generating cost, and energy storage is not discharged, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt GTIt contributes for the cogeneration of t moment, Ct eqFor cost of electricity-generating, λt gFor electricity price of the Utilities Electric Co. in moment t,
λGTFor unit combustion gas cost, Vt GTAmount of natural gas is consumed for cogeneration cooling heating system.
Preferably, when cogeneration cooling heating system can make a profit, workload demand is more than or equal to photovoltaic power output and cogeneration
The sum of when, if electricity price when current bulk power grid electricity price is not paddy, energy storage remaining capacity does not reach electric discharge limit value and current electric grid electricity price is high
In energy storing and electricity generating cost, energy storage electric discharge, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt GTIt contributes for the cogeneration of t moment, pt dismFor the energy-storage battery discharge power of t moment, Ct eqFor cost of electricity-generating,
λt gFor electricity price of the Utilities Electric Co. in moment t, λt ESFor energy-storage battery t moment unit generated energy cost, λGTFor unit combustion gas at
This, Vt GTAmount of natural gas is consumed for cogeneration cooling heating system.
Positive beneficial effect of the invention: 1. Current Domestic market mechanisms are also unsound, and rate for incorporation into the power network is according to all kinds of electricity
Source is individually appraised and decided, the present invention based on existing power supply and load model, comprehensively consider rate for incorporation into the power network, photovoltaic power generation cost,
The operation characteristic of the factors such as photovoltaic online electricity price and each distributed energy is divided respectively with the minimum target of micro-capacitance sensor operation cost
The power output strategy for having analysed each power supply under different grid type micro-capacitance sensor difference service conditions obtains the 14 of micro-capacitance sensor by optimization
Kind management and running strategy, covers all situations of actual motion, and effective economic tune can be carried out for different operational modes
Degree, can not only reflect the real features of micro-grid connection load, and is able to reflect out all kinds of electricity prices and coordinates place, to from now on
Related electricity price regulation is instructed to have great importance.
2. synthesis is examined the present invention is based on the grid type micro-capacitance sensor internal diversity power supply electricity price and cost of electricity-generating of business type
The grid type micro-capacitance sensor for considering business type considers all kinds of power supply electricity prices and cost of electricity-generating, normal for include in business type micro-capacitance sensor
See that power supply type proposes different cost models, improve the power configuration inside micro-capacitance sensor, develops a kind of grid type micro-capacitance sensor
The Optimization Scheduling that power supply is contributed under different Run-time scenarios analyzes grid entry point aggregate load characteristic, has obtained all kinds of power supplys not
With the power output strategy and state change approach under scene, optimal operation model is established on this basis, analyzes grid type micro-capacitance sensor
Power output feature, lay the foundation for the planning and design of the micro-capacitance sensor containing grid type.
Detailed description of the invention
Fig. 1 is the grid type micro-grid system structure chart of business type；
Fig. 2 is gas turbine operation principle schematic diagram；
Fig. 3 is the grid type micro-capacitance sensor control strategy schematic diagram of business type.
Specific embodiment
Below with reference to some specific embodiments, the present invention is further described.
Fig. 1 is the grid type micro-grid system structure chart of business type, is one for entire micro-capacitance sensor opposite outer power grid
It is whole, it is associated by the substation of a static switch and higher level's power grid.It include photo-voltaic power supply, energy-storage battery in micro-capacitance sensor
And cogeneration cooling heating system, the cogeneration cooling heating system (Combined being made of miniature gas turbine (Gas Turbine, GT)
Cooling Heating and Power, CCHP) to (cold) energy of user's heat supply simultaneously and electric energy, to improve it using effect
Rate.
Micro-capacitance sensor independent operation mode carries out power supply control by target of micro-capacitance sensor itself profit maximization, therefore, design
Micro-capacitance sensor operational objective function is that micro-capacitance sensor operating cost is minimum, function are as follows:
In formula: C is every day operation overall cost；CprFor micro-capacitance sensor sale of electricity income；CcoFor power supply total generation cost；pt ES、
pt PVWith pt GTFor the power output of energy storage, photovoltaic and cogeneration cooling heating system in t moment, V in micro-capacitance sensort GTFor cogeneration system
System consumption amount of natural gas, λESWith λPVFor the unit generated energy cost of energy storage and photovoltaic, λGTFor unit combustion gas cost；λt gFor electric power
Electricity price of the company in moment t, LgIt is used for the electricity expenses of surfing in Internet that micro-capacitance sensor is bought to Utilities Electric Co..
Cogeneration cooling heating system is developed on the basis of co-generation unit, be can be used for meeting building energy demand, is
By Conventional thermoelectric co-generation system application and in terms of expand and grow a kind of supply system, working principle
As shown in Figure 2.
The difference of priority according to demand, the system are generally divided into " electricity determining by heat " and " with the fixed heat of electricity " two kinds of operation moulds
Formula；" electricity determining by heat " refers to that System Priority meets heat load demand, electric energy is considered as it is attached, if electric load demand without
Method meets, then can be supplemented by other approach (such as other generator units or from power grid power purchase)；In contrast, " fixed with electricity
Heat " mode preferentially guarantees that electric load demand is met, and by thermal energy as accessory, if heat load demand obtains not
To satisfaction, then can be supplemented by thermal energy output equipment (such as boiler).
Cogeneration cooling heating system heat production produces and cold should meet following condition:
Wherein, Qhdem、QcdemIt is hot refrigeration duty demand respectively；QGTh、QGTcFor the heating capacity of gas turbine cogeneration
And refrigerating capacity, Qgridh、QgridcFor the heating capacity and refrigerating capacity of electric boiler and electric refrigerating machine, in which:
In above formula, pgheat、pgcoolRespectively meet power consumption when cooling and heating load using electric boiler and electric refrigerating machine；
Cgh、CgcRespectively the heating efficiency system of electric boiler and electric refrigerating machine and cold coefficient；
Cogeneration cooling heating system power output should also meet the consumption fuel cost of unit shown in formula (4)-(7) and power simultaneously
Output relation:
Qgt-co=QGT×COPco (5)
Qgt-hs=QGT×COPhe (6)
Wherein, QGTFor gas turbine flue gas excess heat；PeFor gas turbine output power；ηeFor gas turbine power generation effect
Rate 27%；ηLFor gas turbine radiation loss coefficient 3%；Qgt-co、Qgt-heThe respectively refrigeration of gas turbine flue gas waste heat offer
Amount and heating capacity；COPco、COPheThe respectively coefficient of refrigerating performance and heating efficiency of bromine cooling machine；VGTFor runing time internal-combustion gas turbine engine
The amount of natural gas of consumption；Δt1For the runing time of gas turbine；LHVNGFor natural gas low-heat calorific value.
Photovoltaic array is made of by way of serial or parallel connection several photovoltaic modules, wherein single-piece photovoltaic module
Output power can indicate are as follows:
In above formula, psFor the full test power under standard test condition, G is practical intensity of illumination, GSTFor standard survey
Solar illuminating intensity under the conditions of examination, value 1000W/m2, ηTFor temperature coefficient, TsIt, can be with for component operation actual temperature
It is estimated by environment temperature T and intensity of illumination G, TSTFor reference temperature, 25 DEG C of value；Wherein,
Wherein, T is environment temperature, TNFor component operation rated temperature, unit DEG C；Solar components output power and light
According to the function of intensity G and environment temperature T:
Therefore, the average output power of photovoltaic array are as follows:
Energy storage has the ability of electric energy supply in systems stabilisation, plays the schedulability energy of enhancing distributed generation unit
Effect, the model of energy-storage battery can be by a controllable voltage source EbIt is connected in series with constant value internal resistance, controlled source EbExpression formula energy
It is enough to indicate are as follows:
Wherein, EbIt is the floating voltage of energy-storage battery, E0It is the constant voltage of energy-storage battery, K is polarizing voltage, and Q is storage
The capacity of energy battery, A are exponential gain voltage, and B is time gain capacity.It is calculated by the flash-over characteristic of energy-storage battery above-mentioned
Parameter.
Since micro-capacitance sensor contains the user of various energy resources demand, and micro-capacitance sensor can be dispatched with isolated operation, therefore
Scheduling economy when operation must pay the utmost attention to grid-connected in the condition for meeting micro-capacitance sensor internal load demand.Micro-capacitance sensor is simultaneously
Economic operation problem when net will not only consider the power output scheduling strategy in each micro- source, it is also necessary to consider the electricity of micro-capacitance sensor and outer net
It can influence of the transaction to micro-grid system benefit.
For photo-voltaic power supply, it is needed to be continued for contributing, photovoltaic cell is in micro-capacitance sensor any time section
All Ying Rangqi electricity as multiple as possible reduces cost of electricity-generating to reduce other power supplys power output.Meanwhile energy-storage battery should defer to low storage
High-incidence strategy compares the electricity price λ of t moment in given time section t firstt gWith energy-storage battery unit generated energy cost λES
Size, work as λES> λt gWhen, energy-storage battery charges in the case where meeting charge power constraint condition, and otherwise energy-storage battery is put in satisfaction
It discharges under conditions of electrical power constraint.In addition, can the criterion by cogeneration cooling heating system to make a profit as start and stop, work as operation
When cost is lower than electric heating/cooling supply cost, that is, cogeneration unit is run when meeting formula (13).
Vt GT·λGT-pGT·λt g< (pgheat+pgcool)·λt g (13)
(V in formulat GT·λGT–pGT·λt g) indicate that the t period supplies the operating cost of cooling and heating load using gas turbine,
(pgheat+pgcool)·λt gIt indicates to be equal to combustion gas by what electric boiler heat production and electric refrigerating machine refrigeration generated in discontinuity surface when t
The electricity charge that heating capacity produced by turbine cogeneration and refrigerating capacity need；When the former is less than the latter, using cogeneration
Mode it is more economical, conversely, then meeting workload demand using electric boiler or electric refrigerating machine.
The grid type micro-capacitance sensor power supply power output policy map of business type is shown in Fig. 3, amounts in 14 kinds of modes, photovoltaic neither considers
Light is abandoned, total power power output is specific as follows:
1. workload demand and the sum of electric boiler or electric refrigerating machine power consumption are less than light when cogeneration cooling heating system cannot make a profit
When volt power output, if energy storage remaining capacity does not reach charging limit value, current electricity prices are lower than energy storing and electricity generating cost, then energy-storage battery is with most
Big charge power charges, associative mode C1, in this mode micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt h-cFor the power that the cogeneration cooling heating system of t moment consumes, pt chmFor the energy-storage battery charge power of t moment, Ct eq
For cost of electricity-generating, λt gFor electricity price of the Utilities Electric Co. in moment t；
Meanwhile energy-storage battery cost of electricity-generating increases to:
λt ESFor t moment energy-storage battery cost of electricity-generating, EtFor the voltage of t moment energy-storage battery, λt gFor t moment Utilities Electric Co.
Electricity price.
2. workload demand and the sum of electric boiler or electric refrigerating machine power consumption are less than light when cogeneration cooling heating system cannot make a profit
When volt power output, if energy storage remaining capacity does not reach charging limit value, current electricity prices are higher than energy storing and electricity generating cost, then energy-storage battery is with only
It is charged using photovoltaic power generation allowance, associative mode C2, micro-capacitance sensor external characteristics and cost of electricity-generating in this mode are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt h-cFor the power that the cogeneration cooling heating system of t moment consumes, pt chmFor the energy-storage battery charge power of t moment, Ct eq
For cost of electricity-generating, λt gFor electricity price of the Utilities Electric Co. in moment t.
3. the sum of workload demand and electric boiler or electric refrigerating machine power consumption go out less than photovoltaic when cogeneration cannot make a profit
When power, and energy storage remaining capacity has reached when charging limit value, and energy-storage battery does not charge, corresponding operational mode C3, micro- electricity under the mode
Net external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt h-cFor the power that the cogeneration cooling heating system of t moment consumes, Ct eqFor cost of electricity-generating, λt gIt is Utilities Electric Co. in moment t
When electricity price.
4. cannot make a profit when cogeneration cooling heating system, workload demand and the sum of electric boiler or electric refrigerating machine power consumption are greater than etc.
When photovoltaic power output, if electricity price when current bulk power grid electricity price is paddy, current time is mostly midnight, if energy storage at this time is remaining
Electricity has reached charging limit value, and energy-storage battery is without charging, associative mode C4, in this mode micro-capacitance sensor external characteristics and power generation
Cost are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt h-cFor the power that the cogeneration of t moment consumes, Ct eqFor cost of electricity-generating, λt gFor Utilities Electric Co. in moment t
Electricity price.
5. cannot make a profit when cogeneration cooling heating system, workload demand and the sum of electric boiler or electric refrigerating machine power consumption are greater than etc.
When photovoltaic power output, if electricity price when current bulk power grid electricity price is paddy, if energy storage remaining capacity does not reach charging limit value at this time, storage
Energy battery charges, associative mode C5, in this mode micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt h-cFor the power that the cogeneration of t moment consumes, pt chmFor the energy-storage battery charge power of t moment, Ct eqFor hair
Electric cost, λt gFor electricity price of the Utilities Electric Co. in moment t；
Meanwhile energy-storage battery cost of electricity-generating increases to:
λt ESFor t moment energy-storage battery cost of electricity-generating, EtFor the voltage of energy-storage battery t moment, λt gFor Utilities Electric Co. when
Carve electricity price when t.
6. cannot make a profit when cogeneration cooling heating system, workload demand and the sum of electric boiler or electric refrigerating machine power consumption are greater than etc.
When photovoltaic power output, if electricity price when current bulk power grid electricity price is not paddy, energy storage remaining capacity has reached electric discharge limit value or energy storage is surplus
Remaining electricity does not reach electric discharge limit value and current electric grid electricity price is lower than energy storing and electricity generating cost, and energy storage is not discharged, associative mode C6, at this
Micro-capacitance sensor external characteristics and cost of electricity-generating under mode are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt h-cFor the power that the cogeneration of t moment consumes, Ct eqFor cost of electricity-generating, λt gFor Utilities Electric Co. in moment t
Electricity price.
7. cannot make a profit when cogeneration cooling heating system, workload demand and the sum of electric boiler or electric refrigerating machine power consumption are greater than etc.
When photovoltaic power output, if electricity price when current bulk power grid electricity price is not paddy, energy storage remaining capacity do not reach electric discharge limit value and current electric grid
Electricity price is higher than energy storing and electricity generating cost, and energy storage is discharged, associative mode C7, in this mode micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt h-cFor the power that the cogeneration of t moment consumes, pt dismFor the energy-storage battery discharge power of t moment, Ct eqFor hair
Electric cost, λt gFor electricity price of the Utilities Electric Co. in moment t, λt ESFor t moment energy-storage battery cost of electricity-generating.
8. when cogeneration cooling heating system can make a profit, when workload demand is less than the sum of photovoltaic power output and cogeneration, if
Energy storage remaining capacity does not reach charging limit value, and current electricity prices are lower than energy storing and electricity generating cost, then energy-storage battery with maximum charge power into
Row charges, associative mode C8, in this mode micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt GTIt contributes for the cogeneration of t moment, pt chmFor the energy-storage battery charge power of t moment, Ct eqFor cost of electricity-generating,
λt gFor electricity price of the Utilities Electric Co. in moment t；
Meanwhile energy-storage battery cost of electricity-generating increases to:
λt ESFor t moment energy-storage battery cost of electricity-generating, EtFor the voltage of energy-storage battery t moment, pt chmFor the energy storage of t moment
Battery charge power, λt gFor electricity price of the Utilities Electric Co. in moment t.
9. when cogeneration cooling heating system can make a profit, when workload demand is less than the sum of photovoltaic power output and cogeneration, if
Energy storage remaining capacity does not reach charging limit value, and current electricity prices are higher than energy storing and electricity generating cost, then energy-storage battery is merely with photovoltaic power generation
Allowance charges, associative mode C9, in this mode micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt GTIt contributes for the cogeneration of t moment, pt chmFor the energy-storage battery charge power of t moment, Ct eqFor cost of electricity-generating,
λt gFor electricity price of the Utilities Electric Co. in moment t, λGTFor unit combustion gas cost, Vt GTNatural gas is consumed for cogeneration cooling heating system
Amount.
10. when cogeneration cooling heating system can make a profit, when workload demand is less than the sum of photovoltaic power output and cogeneration,
And energy storage remaining capacity has reached when charging limit value, energy-storage battery does not charge, corresponding operational mode C10, under the mode outside micro-capacitance sensor
Characteristic and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt GTIt contributes for the cogeneration of t moment, Ct eqFor cost of electricity-generating, λt gFor electricity price of the Utilities Electric Co. in moment t,
λGTFor unit combustion gas cost, Vt GTAmount of natural gas is consumed for cogeneration cooling heating system.
11. workload demand is more than or equal to the sum of photovoltaic power output and cogeneration when cogeneration cooling heating system can make a profit
When, if electricity price when current bulk power grid electricity price is paddy, current time is mostly midnight, if energy storage remaining capacity has been reached and filled at this time
Electric limit value, energy-storage battery is without charging, associative mode C11, in this mode micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt GTIt contributes for the cogeneration of t moment, Ct eqFor cost of electricity-generating, λt gFor electricity price of the Utilities Electric Co. in moment t,
λGTFor unit combustion gas cost, Vt GTAmount of natural gas is consumed for cogeneration cooling heating system.
12. workload demand is more than or equal to the sum of photovoltaic power output and cogeneration when cogeneration cooling heating system can make a profit
When, if electricity price when current bulk power grid electricity price is paddy, if energy storage remaining capacity does not reach charging limit value at this time, energy-storage battery charges,
Associative mode C12, in this mode micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt GTIt contributes for the cogeneration of t moment, pt chmFor the energy-storage battery charge power of t moment, Ct eqFor cost of electricity-generating,
λt gFor electricity price of the Utilities Electric Co. in moment t, λGTFor unit combustion gas cost, Vt GTNatural gas is consumed for cogeneration cooling heating system
Amount；
Meanwhile energy-storage battery cost of electricity-generating increases to:
λt ESFor t moment energy-storage battery cost of electricity-generating, EtFor the voltage of energy-storage battery t moment, pt chmFor the energy storage of t moment
Battery charge power, λt gFor electricity price of the Utilities Electric Co. in moment t.
13. workload demand is more than or equal to the sum of photovoltaic power output and cogeneration when cogeneration cooling heating system can make a profit
When, if electricity price and energy storage remaining capacity has reached electric discharge limit value or energy storage remaining capacity does not reach when current bulk power grid electricity price is not paddy
Limit value and the current electric grid electricity price of discharging are lower than energy storing and electricity generating cost, and energy storage is not discharged, associative mode C13, in this mode micro- electricity
Net external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt GTIt contributes for the cogeneration of t moment, Ct eqFor cost of electricity-generating, λt gFor electricity price of the Utilities Electric Co. in moment t,
λGTFor unit combustion gas cost, Vt GTAmount of natural gas is consumed for cogeneration cooling heating system；
14. workload demand is more than or equal to the sum of photovoltaic power output and cogeneration when cogeneration cooling heating system can make a profit
When, if electricity price when current bulk power grid electricity price is not paddy, energy storage remaining capacity does not reach electric discharge limit value and current electric grid electricity price is higher than storage
Energy cost of electricity-generating, energy storage are discharged, associative mode C14, in this mode micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor micro-capacitance sensor external characteristics (i.e. microgrid power), pt PVPower output for photovoltaic in t moment, pt LFor t moment
Load, pt GTIt contributes for the cogeneration of t moment, pt dismFor the energy-storage battery discharge power of t moment, Ct eqFor cost of electricity-generating,
λt gFor electricity price of the Utilities Electric Co. in moment t, λt ESFor energy-storage battery t moment unit generated energy cost, λGTFor unit combustion gas at
This, Vt GTAmount of natural gas is consumed for cogeneration cooling heating system；
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, this field is common
Other modifications or equivalent replacement that technical staff makes technical solution of the present invention, without departing from the technology of the present invention side
The spirit and scope of case, are intended to be within the scope of the claims of the invention.
Claims (9)
1. the operation method of grid type micro-capacitance sensor under a kind of differentiation power supply electricity price, which comprises the following steps:
(1) electricity price of current t moment is determined, then can calculating cogeneration cooling heating system get a profit, if cannot get a profit, use electricity
Otherwise refrigeration machine and electric boiler use cogeneration cooling heating system；
(2) in the case where cogeneration cooling heating system cannot get a profit, compare the sum of workload demand and cold and hot electricity demanding and go out with photovoltaic
The size of power is contributed if it is greater than or equal to photovoltaic, then supply falls short of demand at this time, energy-storage battery electric discharge or from bulk power grid power purchase；If being less than
Photovoltaic power output, then supply exceed demand at this time, charges to energy-storage battery or to bulk power grid sale of electricity；
(3) in the case where cogeneration cooling heating system can get a profit, compare workload demand and photovoltaic power output and cogeneration it
The size of sum, if workload demand is more than or equal to the sum of photovoltaic power output and cogeneration, supply falls short of demand at this time, and energy-storage battery is put
Electricity or from bulk power grid power purchase, if workload demand is less than the sum of photovoltaic power output and cogeneration, supply exceed demand at this time, to energy storage
Battery charging or to bulk power grid sale of electricity.
2. the operation method of grid type micro-capacitance sensor under differentiation power supply electricity price according to claim 1, which is characterized in that step
Suddenly the calculation formula that can (1) cogeneration cooling heating system get a profit are as follows:
Vt GT·λGT-pGT·λt g< (pgheat+pgcool)·λt g,
(Vt GT·λGT–pGT·λt g) indicate that the t period uses the operating cost of gas turbine supply cooling and heating load, (pgheat+
pgcool)·λt gIndicate when t in discontinuity surface by electric boiler heat production and electric refrigerating machine refrigeration generate to be equal to gas turbine cold and hot
The electricity charge that heating capacity produced by is produced from Electricity Federation and refrigerating capacity need；When the former is less than the latter, cogeneration cooling heating system profit.
3. the operation method of grid type micro-capacitance sensor under differentiation power supply electricity price according to claim 1, which is characterized in that step
Suddenly (2) energy-storage battery charge and discharge and the relationship that energy storage cost and electricity price are considered as to the selection that bulk power grid sells power purchase, it then follows low storage
High-incidence principle, while being also contemplated that energy-storage battery state-of-charge SOC state.
4. the operation method of grid type micro-capacitance sensor under differentiation power supply electricity price according to claim 3, which is characterized in that institute
The high-incidence principle of low storage stated are as follows: in given time section t, compare the electricity price λ of t moment firstt gIt generates electricity with energy-storage battery unit
Measure cost λESSize, work as λES> λt gWhen, energy-storage battery charges in the case where meeting charge power constraint condition, otherwise energy-storage battery
It discharges under conditions of meeting discharge power constraint.
5. the operation method of grid type micro-capacitance sensor under differentiation power supply electricity price according to claim 3, which is characterized in that institute
The charging upper limit of the energy-storage battery state-of-charge SOC stated is 80%, and electric discharge lower limit is 20%.
6. the operation method of grid type micro-capacitance sensor under differentiation power supply electricity price according to claim 1, which is characterized in that when
Cogeneration cooling heating system cannot make a profit, when workload demand and the sum of electric boiler or electric refrigerating machine power consumption are less than photovoltaic power output, if storage
Energy remaining capacity does not reach charging limit value, and current electricity prices are lower than energy storing and electricity generating cost, then energy-storage battery is carried out with maximum charge power
Charging, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor microgrid power, pt PVPower output for photovoltaic in t moment, pt LFor the load of t moment, pt h-cFor the cold of t moment
The power of co-generation unit consumption, pt chmFor the energy-storage battery charge power of t moment, Ct eqFor cost of electricity-generating, λt gFor electric power public affairs
Take charge of the electricity price in moment t；
Meanwhile energy-storage battery cost of electricity-generating increases to:
λt ESFor t moment energy-storage battery cost of electricity-generating, EtFor the voltage of t moment energy-storage battery, λt gFor the electricity of t moment Utilities Electric Co.
Valence；
When cogeneration cooling heating system cannot make a profit, workload demand and the sum of electric boiler or electric refrigerating machine power consumption are contributed less than photovoltaic
When, if energy storage remaining capacity does not reach charging limit value, current electricity prices are higher than energy storing and electricity generating cost, then energy-storage battery is merely with photovoltaic
Power generation allowance charges, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor microgrid power, pt PVPower output for photovoltaic in t moment, pt LFor the load of t moment, pt h-cFor the cold of t moment
The power of co-generation unit consumption, pt chmFor the energy-storage battery charge power of t moment, Ct eqFor cost of electricity-generating, λt gFor electric power public affairs
Take charge of the electricity price in moment t；
When cogeneration cannot make a profit, and workload demand and the sum of electric boiler or electric refrigerating machine power consumption are less than photovoltaic power output, and
When energy storage remaining capacity has reached charging limit value, energy-storage battery does not charge, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor microgrid power, pt PVPower output for photovoltaic in t moment, pt LFor the load of t moment, pt h-cFor the cold of t moment
The power of co-generation unit consumption, Ct eqFor cost of electricity-generating, λt gFor electricity price of the Utilities Electric Co. in moment t.
7. the operation method of grid type micro-capacitance sensor under differentiation power supply electricity price according to claim 1, which is characterized in that when
Cogeneration cooling heating system cannot make a profit, when workload demand and the sum of electric boiler or electric refrigerating machine power consumption are more than or equal to photovoltaic power output,
Electricity price when if current bulk power grid electricity price is paddy, current time is mostly midnight, if energy storage remaining capacity has reached charging limit at this time
Value, energy-storage battery is without charging, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqTo be microgrid power, pt PVPower output for photovoltaic in t moment, pt LFor the load of t moment, pt h-cFor t moment
The power of cogeneration consumption, Ct eqFor cost of electricity-generating, λt gFor electricity price of the Utilities Electric Co. in moment t；
When cogeneration cooling heating system cannot make a profit, the sum of workload demand and electric boiler or electric refrigerating machine power consumption go out more than or equal to photovoltaic
When power, if electricity price when current bulk power grid electricity price is paddy, if energy storage remaining capacity does not reach charging limit value at this time, energy-storage battery fills
Electricity, associative mode C5, in this mode micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqTo be microgrid power, pt PVPower output for photovoltaic in t moment, pt LFor the load of t moment, pt h-cFor t moment
The power of cogeneration consumption, pt chmFor the energy-storage battery charge power of t moment, Ct eqFor cost of electricity-generating, λt gFor Utilities Electric Co.
Electricity price in moment t；
Meanwhile energy-storage battery cost of electricity-generating increases to:
λt ESFor t moment energy-storage battery cost of electricity-generating, EtFor the voltage of energy-storage battery t moment, λt gIt is Utilities Electric Co. in moment t
Electricity price；
When cogeneration cooling heating system cannot make a profit, the sum of workload demand and electric boiler or electric refrigerating machine power consumption go out more than or equal to photovoltaic
When power, if electricity price when current bulk power grid electricity price is not paddy, energy storage remaining capacity has reached electric discharge limit value or energy storage remaining capacity does not reach
Limit value and the current electric grid electricity price of discharging are lower than energy storing and electricity generating cost, and energy storage is not discharged, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor microgrid power, pt PVPower output for photovoltaic in t moment, pt LFor the load of t moment, pt h-cFor the cold of t moment
The power of cogeneration of heat and power consumption, Ct eqFor cost of electricity-generating, λt gFor electricity price of the Utilities Electric Co. in moment t；
When cogeneration cooling heating system cannot make a profit, the sum of workload demand and electric boiler or electric refrigerating machine power consumption go out more than or equal to photovoltaic
When power, if electricity price when current bulk power grid electricity price is not paddy, energy storage remaining capacity does not reach electric discharge limit value and current electric grid electricity price is higher than
Energy storing and electricity generating cost, energy storage electric discharge, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor microgrid power, pt PVPower output for photovoltaic in t moment, pt LFor the load of t moment, pt h-cFor the cold of t moment
The power of cogeneration of heat and power consumption, pt dismFor the energy-storage battery discharge power of t moment, Ct eqFor cost of electricity-generating, λt gFor Utilities Electric Co.
Electricity price in moment t, λt ESFor t moment energy-storage battery cost of electricity-generating.
8. the operation method of grid type micro-capacitance sensor under differentiation power supply electricity price according to claim 1, which is characterized in that when
Cogeneration cooling heating system can make a profit, when workload demand is less than the sum of photovoltaic power output and cogeneration, if energy storage remaining capacity
Not up to charging limit value, current electricity prices are lower than energy storing and electricity generating cost, then energy-storage battery is charged with maximum charge power, micro-capacitance sensor
External characteristics and cost of electricity-generating are as follows:
pt eqFor microgrid power, pt PVPower output for photovoltaic in t moment, pt LFor the load of t moment, pt GTFor the cold and hot of t moment
Electricity Federation output power, pt chmFor the energy-storage battery charge power of t moment, Ct eqFor cost of electricity-generating, λt gIt is Utilities Electric Co. in moment t
Electricity price；
Meanwhile energy-storage battery cost of electricity-generating increases to:
λt ESFor t moment energy-storage battery cost of electricity-generating, EtFor the voltage of energy-storage battery t moment, pt chmIt is filled for the energy-storage battery of t moment
Electrical power, λt gFor electricity price of the Utilities Electric Co. in moment t；
When cogeneration cooling heating system can make a profit, and workload demand is less than the sum of photovoltaic power output and cogeneration, if energy storage is surplus
Remaining electricity does not reach charging limit value, and current electricity prices are higher than energy storing and electricity generating cost, then energy-storage battery with merely with photovoltaic power generation allowance into
Row charging, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor microgrid power, pt PVPower output for photovoltaic in t moment, pt LFor the load of t moment, pt GTFor the cold and hot of t moment
Electricity Federation output power, pt chmFor the energy-storage battery charge power of t moment, Ct eqFor cost of electricity-generating, λt gIt is Utilities Electric Co. in moment t
Electricity price, λGTFor unit combustion gas cost, Vt GTAmount of natural gas is consumed for cogeneration cooling heating system；
When cogeneration cooling heating system can make a profit, and workload demand is less than the sum of photovoltaic power output and cogeneration, and energy storage is surplus
When remaining electricity has reached charging limit value, energy-storage battery does not charge, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor microgrid power, pt PVPower output for photovoltaic in t moment, pt LFor the load of t moment, pt GTFor the cold and hot of t moment
Electricity Federation output power, Ct eqFor cost of electricity-generating, λt gFor electricity price of the Utilities Electric Co. in moment t, λGTFor unit combustion gas cost, Vt GTFor
Cogeneration cooling heating system consumes amount of natural gas.
9. the operation method of grid type micro-capacitance sensor under differentiation power supply electricity price according to claim 1, which is characterized in that when
Cogeneration cooling heating system can make a profit, when workload demand is more than or equal to the sum of photovoltaic power output and cogeneration, if current big electricity
Electricity price when net electricity price is paddy, then current time is mostly midnight, if energy storage remaining capacity has reached charging limit value, energy-storage battery at this time
Without charging, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor microgrid power, pt PVPower output for photovoltaic in t moment, pt LFor the load of t moment, pt GTFor the cold and hot of t moment
Electricity Federation output power, Ct eqFor cost of electricity-generating, λt gFor electricity price of the Utilities Electric Co. in moment t, λGTFor unit combustion gas cost, Vt GTFor
Cogeneration cooling heating system consumes amount of natural gas；
When cogeneration cooling heating system can make a profit, and workload demand is more than or equal to the sum of photovoltaic power output and cogeneration, if working as
Electricity price when preceding bulk power grid electricity price is paddy, if energy storage remaining capacity does not reach charging limit value at this time, energy-storage battery charges, outside micro-capacitance sensor
Characteristic and cost of electricity-generating are as follows:
pt eqFor microgrid power, pt PVPower output for photovoltaic in t moment, pt LFor the load of t moment, pt GTFor the cold and hot of t moment
Electricity Federation output power, pt chmFor the energy-storage battery charge power of t moment, Ct eqFor cost of electricity-generating, λt gIt is Utilities Electric Co. in moment t
Electricity price, λGTFor unit combustion gas cost, Vt GTAmount of natural gas is consumed for cogeneration cooling heating system；
Meanwhile energy-storage battery cost of electricity-generating increases to:
λt ESFor t moment energy-storage battery cost of electricity-generating, EtFor the voltage of energy-storage battery t moment, pt chmIt is filled for the energy-storage battery of t moment
Electrical power, λt gFor electricity price of the Utilities Electric Co. in moment t；
When cogeneration cooling heating system can make a profit, and workload demand is more than or equal to the sum of photovoltaic power output and cogeneration, if working as
Electricity price when preceding bulk power grid electricity price is not paddy, energy storage remaining capacity has reached electric discharge limit value or energy storage remaining capacity does not reach electric discharge limit value
And current electric grid electricity price is lower than energy storing and electricity generating cost, energy storage is not discharged, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor microgrid power, pt PVPower output for photovoltaic in t moment, pt LFor the load of t moment, pt GTFor the cold and hot of t moment
Electricity Federation output power, Ct eqFor cost of electricity-generating, λt gFor electricity price of the Utilities Electric Co. in moment t, λGTFor unit combustion gas cost, Vt GTFor
Cogeneration cooling heating system consumes amount of natural gas；
When cogeneration cooling heating system can make a profit, and workload demand is more than or equal to the sum of photovoltaic power output and cogeneration, if working as
Electricity price when preceding bulk power grid electricity price is not paddy, energy storage remaining capacity do not reach electric discharge limit value, current electric grid electricity price be higher than energy storing and electricity generating at
This, energy storage is discharged, micro-capacitance sensor external characteristics and cost of electricity-generating are as follows:
pt eqFor microgrid power, pt PVPower output for photovoltaic in t moment, pt LFor the load of t moment, pt GTFor the cold and hot of t moment
Electricity Federation output power, pt dismFor the energy-storage battery discharge power of t moment, Ct eqFor cost of electricity-generating, λt gIt is Utilities Electric Co. in moment t
Electricity price, λt ESFor energy-storage battery t moment unit generated energy cost, λGTFor unit combustion gas cost, Vt GTFor cogeneration cooling heating system
Consume amount of natural gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910453597.8A CN110061499B (en) | 2019-05-28 | 2019-05-28 | Operation method of grid-connected micro-grid under differentiated power price |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910453597.8A CN110061499B (en) | 2019-05-28 | 2019-05-28 | Operation method of grid-connected micro-grid under differentiated power price |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110061499A true CN110061499A (en) | 2019-07-26 |
| CN110061499B CN110061499B (en) | 2021-08-27 |
Family
ID=67324864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910453597.8A Active CN110061499B (en) | 2019-05-28 | 2019-05-28 | Operation method of grid-connected micro-grid under differentiated power price |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110061499B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258610A (en) * | 2021-06-30 | 2021-08-13 | 云南电网有限责任公司电力科学研究院 | Method and device for adjusting micro-grid |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201797324U (en) * | 2010-07-30 | 2011-04-13 | 北京市电力公司 | Intelligent microgrid |
| CN102354974A (en) * | 2011-10-13 | 2012-02-15 | 山东大学 | Micro-grid multi-objective optimized operation control method |
| US20140005852A1 (en) * | 2012-06-28 | 2014-01-02 | Nec Laboratories America, Inc. | Reduction of operational cost using energy storage management and demand response |
| CN109217349A (en) * | 2017-06-30 | 2019-01-15 | 国网山西省电力公司经济技术研究院 | Based under more micro-grid connection scenes and the micro-capacitance sensor external characteristics method for solving of operation reserve |
-
2019
- 2019-05-28 CN CN201910453597.8A patent/CN110061499B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201797324U (en) * | 2010-07-30 | 2011-04-13 | 北京市电力公司 | Intelligent microgrid |
| CN102354974A (en) * | 2011-10-13 | 2012-02-15 | 山东大学 | Micro-grid multi-objective optimized operation control method |
| US20140005852A1 (en) * | 2012-06-28 | 2014-01-02 | Nec Laboratories America, Inc. | Reduction of operational cost using energy storage management and demand response |
| CN109217349A (en) * | 2017-06-30 | 2019-01-15 | 国网山西省电力公司经济技术研究院 | Based under more micro-grid connection scenes and the micro-capacitance sensor external characteristics method for solving of operation reserve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258610A (en) * | 2021-06-30 | 2021-08-13 | 云南电网有限责任公司电力科学研究院 | Method and device for adjusting micro-grid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110061499B (en) | 2021-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Liu et al. | Energy storage capacity optimization for autonomy microgrid considering CHP and EV scheduling | |
| Wu et al. | Optimal switching renewable energy system for demand side management | |
| Gupta et al. | Modelling of hybrid energy system—Part II: Combined dispatch strategies and solution algorithm | |
| Yang et al. | Optimal two-stage dispatch method of household PV-BESS integrated generation system under time-of-use electricity price | |
| US11159017B2 (en) | Personal power plant system and methods of inverse energy generation | |
| McLarty et al. | Micro-grid energy dispatch optimization and predictive control algorithms; A UC Irvine case study | |
| Jacobus et al. | Evaluating the impact of adding energy storage on the performance of a hybrid power system | |
| Wen et al. | Optimal and stochastic performance of an energy hub-based microgrid consisting of a solar-powered compressed-air energy storage system and cooling storage system by modified grasshopper optimization algorithm | |
| Melhem | Optimization methods and energy management in" smart grids" | |
| Hosseinian et al. | Ideal planning of a hybrid wind-PV-diesel microgrid framework with considerations for battery energy storage and uncertainty of renewable energy resources | |
| Zhi et al. | Scenario-based multi-objective optimization strategy for rural PV-battery systems | |
| Atieh et al. | Hybrid PV/batteries bank/diesel generator solar-renewable energy system design, energy management, and economics | |
| Aiswariya et al. | Optimal microgrid battery scheduling using simulated annealing | |
| Mahani et al. | Economic and operational evaluation of PV and CHP combined with energy storage systems considering energy and regulation markets | |
| CN112883630B (en) | Multi-microgrid system day-ahead optimization economic dispatching method for wind power consumption | |
| Favuzza et al. | Optimization of BESS capacity under a peak load shaving strategy | |
| Murugesan et al. | Cost optimization of PV-diesel systems in nanogrid using LJ Cuckoo search and its application in mobile towers | |
| CN110061499A (en) | The operation method of grid type micro-capacitance sensor under a kind of differentiation power supply electricity price | |
| Zec et al. | Load management in an off-grid hybrid PV–wind–battery system using the power flow control algorithm and fuzzy logic controller | |
| Barbarić et al. | Energy management strategies for combined heat and electric power micro-grid | |
| Arun et al. | Prosumer based demand response for profitable power exchange between end-user and utility | |
| Wu et al. | Optimal schedule of photovoltaic-battery hybrid system at demand side | |
| Chedid et al. | A Techno-economic feasibility study of a green energy initiative for a university campus | |
| Bando et al. | Impact of various characteristics of electricity and heat demand on the optimal configuration of a microgrid | |
| Ma et al. | The energy management strategies of residential integrated energy system considering integrated demand response |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200628 Address after: 450052 C building, No. 87, Songshan office, South Zhengzhou Road, 27 District, Henan 1-10, China Applicant after: ECONOMIC TECHNOLOGY RESEARCH INSTITUTE OF STATE GRID HENAN ELECTRIC POWER Co. Address before: 450000 C building, No. 87, Songshan office, South Zhengzhou Road, 27 District, Henan 1-10, China Applicant before: ECONOMIC TECHNOLOGY RESEARCH INSTITUTE OF STATE GRID HENAN ELECTRIC POWER Co. Applicant before: STATE GRID CORPORATION OF CHINA |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |