CN104716644B - Renewable energy source cooling, heating and power microgrid system and control method - Google Patents
Renewable energy source cooling, heating and power microgrid system and control method Download PDFInfo
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- CN104716644B CN104716644B CN201510102430.9A CN201510102430A CN104716644B CN 104716644 B CN104716644 B CN 104716644B CN 201510102430 A CN201510102430 A CN 201510102430A CN 104716644 B CN104716644 B CN 104716644B
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- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
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- 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
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a renewable energy source cooling, heating and power microgrid system and a control method. The renewable energy source cooling, heating and power microgrid system comprises a power module and a cooling/heating module. According to the power module, a solar power generation system is sequentially connected with a DC/DC converter and a DC/AC converter in series and then connected with an AC bus, a wind power generation system is sequentially connected with an AC/DC converter and a DC/AC converter and then connected with the AC bus, a gas internal combustion generation system is directly connected with the AC bus, a storage battery pack is connected with the AC bus through a bi-directional DC/AC converter, variable power electricity storage hot water tanks are connected with the AC bus, and the AC bus is connected with a power distribution network through a PCC. The renewable energy source cooling, heating and power microgrid system and the control method have the advantages that clean renewable energy sources such as methane, wind energy and solar energy are adopted as energy sources of a cooling, heating and power microgrid, no pollution is caused to the environment, operation cost is very low, and the application range is wide; by the adoption of a multi-microsource energy supply mode, the problem of capacity allocation redundancy of a single energy supply system can be solved.
Description
Technical field
The regenerative resource cool and thermal power that the present invention relates to renewable energy power generation technical field, particularly one kind of multiple driven by energy is micro-
Net system and control method.
Background technology
1, on the basis of cool and thermal power micro-grid system is built upon cascaded utilization of energy and the mutually coordinated operation in each micro-source, multiple-energy-source form
Cooperate, three kinds of energy hot and cold, electric can be provided a user with simultaneously, be possible not only to the operational efficiency of raising system, reduce energy
Source is wasted, it is also possible to be greatly improved the stability that system is run.
2, China's cooling heating and power generation system mostly utilize gas turbine as prime mover, but when capacity is less (such as 30kW～50kW
Grade), internal combustion engine is compared miniature gas turbine and is either all had obvious advantage in efficiency and performance or on cost.In
The electrical efficiency of fuel engine power generation unit is typically more than 30%, hence it is evident that higher than gas turbine, and operating load characteristic is good, cheap,
Start rapidly, it is easy to production domesticization and large-scale promotion.Therefore, internal combustion engine has richly endowed by nature in small distributed energy supplying system
Advantage and be widely applied prospect.
3, generate electricity as prime mover driven synchronous generator with internal combustion engine, have the energy of about 2/3rds and be converted into heat and depend on
Among flue gas and jacket water.Iff consider electric energy use, the heat dissipation in high-temperature flue gas and cylinder sleeve hot water in environment it
In, then cause a large amount of thermal waste.And cooling heating and power generation system can utilize internal combustion engine generator group to produce electric energy, with the use of remaining
Heat reclamation device, lithium-bromide absorption-type refrigerating machine etc., make full use of high-temperature flue gas and cylinder sleeve hot water generation cold water that internal combustion engine is discharged
And hot water, meet that user is hot and cold, electrical load requirement.
4, by retrieving existing patent, discovery publication No. is the patent of invention of CN 103034204A: a kind of cool and thermal power
Co-feeding system and dispatching method, this system by with natural gas as fuel, uses gas turbines driving generators to power, by electricity air-conditioning,
Ice storage air conditioner cooling, waste-heat recovery device heat supply.This system capacity source is single, if considering peak load during configuration capacity, deposits
In system configuring redundancy problem；Lacking heat-storing device, electric heating couples completely, easily causes the waste of the energy；Use electricity refrigeration side
Formula, during summer, thermal load demands is less, and a large amount of heat energy are wasted, and system energy utilization rate is relatively low.Publication number CN101055121A
Patent of invention, Minisize distributed type solar energy driven combining system for supplying cool, hot energy and electricity, its heat energy is mainly derived from solar thermal collector, is
System is restricted by weather conditions, and effective run time is shorter.
By the analysis to existing system and patent, current cooling heating and power generation system, supply unit is mainly gas turbine, internal combustion
Machine or solar thermal collector.But use solar thermal collector as origin of heat, system is serious by weather conditions restriction, it is impossible to
The operation time of guarantee system and energy stabilization output.And single gas turbine or gas internal-combustion engine make system prime mover, system
Generally use " electricity determining by heat " or " with the fixed heat of electricity " pattern.Owing to internal combustion engine generator group electricity, thermal output have strong coupling,
No matter use which kind of operational mode, all cannot ensure electricity, heat all of.And both of which is required for adjusting in real time combustion gas
Turbine or internal combustion engine are exerted oneself, and therefore system reliability is poor, and unit can not run on efficient district all the time, and energy utilization rate is relatively low,
But also internal-combustion engine life-span can be affected.
Current micro-grid system the most only considers control and the use of electric energy, but is only made up of photoelectricity, wind-powered electricity generation, energy storage
Micro-grid system is affected relatively big by weather, if cannot get online, also can cause the waste of electric energy.And configure the micro-of internal combustion engine generator unit
Net system does not the most consider waste heat recovery, causes a large amount of heat-energy losses.
Summary of the invention
The purpose of the present invention is contemplated to solve the problems referred to above, it is proposed that a kind of regenerative resource cool and thermal power micro-grid system and controlling party
Method, utilizes the generating of solar energy, wind energy and clean gas to combine, configuration heat exchanger, lithium-bromide absorption-type refrigerating machine, heat accumulation,
Storage cold water storage cisterns etc., by cooperating of each system unit, provide the energy of three kinds of forms hot and cold, electric, are conducive to for load
The stability of system operation and economy, it is ensured that the reliability service of system.
To achieve these goals, the present invention adopts the following technical scheme that
A kind of regenerative resource cool and thermal power micro-grid system, including: electricity module and cold heat module；Described electricity module is connected to exchange mother
On line, cold heat module by heat storage water tank as energy transferring device；System can run on cold, heat and electricity triple supply according to actual needs
Operational mode or cogeneration pattern；
Described electricity module include: solar power system, wind generator system, combustion gas internal combustion electricity generation system, accumulator battery and
Variable power electricity heat storage water tank I and variable power electricity heat storage water tank II；Solar power system be sequentially connected in series DC/DC changer and
Accessing ac bus after DC/AC changer, wind generator system is sequentially connected in series AC/DC changer and DC/AC changer is followed by
Entering ac bus, combustion gas internal combustion electricity generation system is directly accessed ac bus, and accumulator battery accesses friendship after two-way DC-AC changer
Stream bus, variable power electricity heat storage water tank is connected with ac bus, and ac bus is connected with power distribution network through PCC.
Described cold heat module includes: solar thermal collector, gas internal-combustion engine, variable power electricity heat storage water tank I, variable power electricity
Heat storage water tank II, storage cold water storage cistern, cigarette-water-to-water heat exchanger, water-water heat exchanger I, water-water heat exchanger II, cistern and hot-water type
Lithium bromide refrigerator；Gas internal-combustion engine is respectively communicated with cigarette-water-to-water heat exchanger and water-water heat exchanger I, and described cigarette-water-to-water heat exchanger and water-
Water-to-water heat exchanger I connects with variable power electricity heat storage water tank I and variable power electricity heat storage water tank II respectively, described solar thermal collector
After connecting with cistern, respectively with cigarette-water-to-water heat exchanger, water-water heat exchanger I, variable power electricity heat storage water tank I and variable power
Electricity heat storage water tank II connects；
Described hot water lithium bromide refrigeration machine is respectively communicated with variable power electricity heat storage water tank I and variable power electricity heat storage water tank II,
Air conditioning system, hot water are accessed after being sequentially connected in series water-water heat exchanger II, storage cold water storage cistern in described hot water lithium bromide refrigeration machine one end
The type lithium bromide refrigerator other end connects with cooling tower.
Described lithium bromide refrigerator chilled water refluxes after water-water heat exchanger II, forms the circulation of A side；Described water-water heat exchanger II
Connect with storage cold water storage cistern, form the circulation of B side.
The driving hot water of described hot water lithium bromide refrigeration machine is provided by variable power electricity heat storage water tank I, passes through hot water lithium bromide
Temperature step-down after the hot water acting of refrigeration machine, is passed through variable power electricity heat storage water tank II to provide living-hygienic hot water or again to add
Heat heats up.
When system runs on cold, heat and electricity triple supply operational mode, wind generator system and solar power system work in maximum all the time
Power output state；Combustion gas internal combustion electricity generation system uses PQ to control when being incorporated into the power networks, when off-network is run, by combustion gas internal combustion
Electricity generation system and accumulator battery provide electric voltage frequency to support, wherein based on combustion gas internal combustion electricity generation system, accumulator for system jointly
Organize auxiliary transitional function；
Cigarette-water-to-water heat exchanger heat outputting coolant-temperature gage is passed through variable power electricity heat storage water tank I storage at more than design temperature A；Will too
The hot water of more than the design temperature A of sun energy heat collector output is passed through variable power electricity heat storage water tank I storage, by solar thermal collector
Hot water in the range of the design temperature [B, A] of output is passed through variable power electricity heat storage water tank II storage；By combustion gas internal combustion electricity generation system
The hot water of more than design temperature B produced through water-water heat exchanger I is passed through variable power electricity heat storage water tank II storage；
Variable power electricity heat storage water tank I provides to lithium bromide refrigerator and drives hot water, provides living-hygienic according to load condition simultaneously
Hot water, variable power electricity heat storage water tank II provides living-hygienic hot water.
When system runs on cogeneration pattern, lithium bromide refrigerator is out of service, and co-feeding system only provides electricity, two kinds of energy of heat
Form；Identical with cold, heat and electricity triple supply operational mode, wind generator system and solar power system work in peak power all the time
Output state；Combustion gas internal combustion electricity generation system uses PQ to control under also net state, under off-network state, combustion gas internal combustion generates electricity
Unit and accumulator battery provide electric voltage frequency to support for system jointly, and wherein based on internal combustion engine generator, accumulator battery is auxiliary；
Variable power electricity heat storage water tank I top is hot water inlet, and bottom connects variable power electricity heat storage water tank II top through pipeline,
During variable power electricity heat storage water tank I full water, variable power electricity heat storage water tank II just has hot water to enter, and the use order of hot water is then
The preferential hot water used in variable power electricity heat storage water tank II.
A kind of control method of regenerative resource cool and thermal power micro-grid system, including:
Grid-connected and off-network state under real-time monitoring system normal operating condition, does not consider time-of-use tariffs situation,
If system is in off-network state, then using " with the fixed heat of electricity " pattern, concrete control method is:
(1)PLKeep constant, and during accumulator SOC≤D1, if P2+P3Increase Δ P, then use batteries to store energy, until storing
Battery is full of；After accumulator is full of, the corresponding electrical heating power increasing variable power electricity heat storage water tank is dissolved unnecessary electric energy, if this
Time Δ P >=λ1X, and duration T >=Tset, then use Stepped control method to reduce internal combustion engine and exert oneself, make variable power electricity water storage
Case electrical power P4<λ1X；
(2)PLKeep constant, and accumulator SOC > D1 time, if P2+P3Increase Δ P, increase variable power electricity heat accumulation the most accordingly
Water tank electrical heating power；If Δ P >=λ1X, and duration T >=Tset, then internal combustion engine is regulated so that it is output reduces X, residue
Electrical power is dissolved by variable power electricity heat storage water tank；
(3)PLIncrease or P2+P3When reducing Δ P, reduce variable power electricity heat storage water tank electrical heating power the most accordingly, if
ΔP>P4, accumulator battery supplement not enough electrical power；Stepped control method increasing combustion engine is used to exert oneself afterwards, if internal combustion engine generator
Electromotive power output P1It is maximum, has then excised load step by step by load rating principle；
(4)PLReduce, and during accumulator SOC≤D1, first accumulator is charged, until being full of；After accumulator is full of,
The corresponding electrical heating power increasing variable power electricity heat storage water tank is dissolved unnecessary electric energy, if now Δ P >=λ1X, and duration T >=Tset,
Then use Stepped control method to reduce internal combustion engine to exert oneself, make variable power electricity heat storage water tank electrical power P4<λ1X；
Accumulator SOC > D1 time, skip accumulator charging link, unnecessary electric energy directly increases variable power electricity heat storage water tank electricity and adds
Thermal power；
Wherein, P1For internal combustion engine generator electromotive power output, P2For solar power system electromotive power output, P3For wind-power electricity generation system
System electromotive power output, TsetFor setting time threshold, D1, λ1For setting value, PLFor electric load power, X is internal combustion engine generator group
" Stepped control " power unit setting value.
If system is in grid-connected upper net state, system runs " electricity determining by heat " pattern of employing, owing to system is configured with variable merit
Rate electricity heat storage water tank, makes combustion gas internal combustion electricity generation system run by heat load prediction meansigma methods；Concrete control method is:
Q1+Q2>QLTime, waste heat is stored in variable power electricity heat storage water tank；Q1+Q2<QLTime, not enough heat is by variable power
Electricity heat storage water tank supplements, and still during deficiency, increasing combustion engine is exerted oneself or starts variable power electricity heat storage water tank electric heating function；Electric power storage
Pond group does not works, and unnecessary electric energy is delivered to power distribution network；Supplemented by bulk power grid during electric energy deficiency；Wherein, Q1For electromotor heat outputting
Power, Q2For solar energy heat outputting power, QLFor system cooling and heating load.
If system is in grid-connected net state of not going up, concrete control method is:
(1)PLKeep constant, during accumulator SOC≤D2, if P2+P3Increase Δ P, then use batteries to store energy；If Δ P >=λ1X,
And duration T >=Tset, then internal combustion engine is regulated so that it is output reduces X；When accumulator reaches saturation, then remain electricity
Power is for increasing the heating power of variable power electricity heat storage water tank；
(2)PLKeep constant, accumulator SOC > D2 time, if P2+P3Increase Δ P, then increase variable power electricity heat storage water tank
Electrical heating power；If Δ P >=λ1X, and duration T >=Tset, then regulate internal combustion engine so that it is output reduces X, remain electric work
Rate is dissolved by variable power electricity heat storage water tank；
(3)PLWhen keeping constant, if P2+P3Reduction Δ P, now, if variable power electricity heat storage water tank P4> 0, the most accordingly
Reduce P4If, P4It is decreased to zero and still cannot compensate Δ P, then from electrical network power purchase P=Δ P-P4；
If P > λ2X, and duration T >=Tset, electromotor electromotive power output P1Not up to maximum, then electromotor output electric work
Rate P1Output increases X, and unnecessary electric energy is dissolved by variable power electricity heat storage water tank；
(4)PLDuring increase, reduce variable power electricity heat storage water tank P the most accordingly4, P4Still cannot meet when=0, then by electrical network
Power purchase, purchase of electricity P=PL-P4If, P > λ2X, and duration T >=Tset, P1Not up to maximum, then P1By Stepped control side
Formula increases, and increments is more than P, and unnecessary electric energy is dissolved by electricity heat storage water tank；
(5)PLDuring reduction, increase variable power electricity heat storage water tank P the most accordingly4, P4≥λ1X, and duration T >=TsetTime,
Then reduce combustion gas internal combustion electricity generation system according to Stepped control mode to exert oneself, until P4<λ1X；
Wherein, P1For internal combustion engine generator electromotive power output, P2For solar power system electromotive power output, P3For wind-power electricity generation system
System electromotive power output, P4For heat storage water tank electrical heating power, TsetFor setting time threshold, D2, λ1、λ2For setting value, PL
For electric load power, X is internal combustion engine generator group " Stepped control " power unit setting value.
If it is considered that time-of-use tariffs, when system grid connection is run, make when electricity price is higher internal combustion engine generator group completely send out, sell to electrical network
Unnecessary electric energy；When electricity price is relatively low, reduces internal combustion engine generator group and exert oneself, increase purchase of electricity, increase electricity heat storage water tank power simultaneously,
Energy storage is carried out with hot water form.
The invention has the beneficial effects as follows:
1, cool and thermal power microgrid uses clean reproducible energy biogas, wind energy, solar energy to be energy source, to environment without any pollution,
And operating cost is the lowest, the scope of application is wider.The most micro-source energy-provision way, it is possible to resolve single energy supplying system capacity configuration redundancy issue.
2, use double heat storage water tank, hot water can be stored separately by temperature range, it is achieved the energy cascade profit of different temperatures hot water
With, compare single layer-stepping heat storage water tank energy storage effect more preferable.
3, heat storage water tank has electric heating function, and power continuously adjustabe.Off-network can be according to load and the change of generated energy when running
Regulate electrical heating power in real time, it is possible to keep system power balance as variable load, thus ensure stablizing of system voltage frequency,
It can be avoided that frequently regulate exerting oneself of internal combustion engine generator group, improve generating set service life and operational efficiency.Additionally, water storage
Case is dissolved as system the new way of unnecessary electric energy, can reduce the configuration capacity of accumulator in microgrid, reduce system cost.And also
During network operation, can need and time-of-use tariffs according to load equally, in section, water tank be heated in seclected time, improve system warp
Ji property.
4, internal combustion engine cylinder jacket hot water, lithium bromide refrigerator chilled water displaces hot water, cold water by heat exchanger.External load variations
Time, utilize the buffering of water tank, memory action, it is ensured that internal combustion engine and refrigeration machine run in efficient district.
5, the output of internal combustion engine generator group uses " Stepped control " mode, and with X (kW), as unit, (numerical value of X can be by bearing
Lotus curvilinear motion rate determines), system electrical power is dissolved by electricity heat storage water tank beyond the part of workload demand.This control mode is permissible
Solve internal combustion engine generator group and run a delayed difficult problem, greatly reduce internal combustion engine generator group simultaneously and control difficulty and control frequency, have
Effect improves unit durability.
Accompanying drawing explanation
Fig. 1 is regenerative resource cool and thermal power micro-grid system summer operation structure chart of the present invention；
Fig. 2 is regenerative resource cool and thermal power micro-grid system winter operation structure chart of the present invention；
Fig. 3 is regenerative resource cool and thermal power micro-grid system spring and autumn operating structure figure of the present invention；
Fig. 4 is that the present invention allows system control process figure in the case of electric energy conveying bulk power grid (i.e. going up net state)；
Fig. 5 is that the present invention does not allow system control process figure in the case of electric energy conveying bulk power grid (not going up net state).
Detailed description of the invention:
The present invention will be further described with embodiment below in conjunction with the accompanying drawings:
Cool and thermal power micro-grid system is made up of electricity module and cold heat module two large divisions.
Electricity module include solar panel, wind-driven generator, gas internal combustion electric generator group, accumulator battery, electricity heat storage water tank,
Electric load etc..Each generating, energy-storage units are linked together by ac bus (380V, 50Hz).Concrete connected mode such as Fig. 1
Shown in: solar power system is connected to ac bus after DC-DC-AC converts, and wind-driven generator becomes through AC-DC-AC
Being connected to ac bus after changing, gas internal combustion electric generator group is directly accessed ac bus, and accumulator battery is through two-way DC-AC changer
It is connected with ac bus.Ac bus is connected with power distribution network through PCC.Electricity heat storage water tank is connected with ac bus, and power
Continuously adjustabe.
System cold heat module mainly includes solar thermal collector, gas internal combustion electric generator group, heat storage water tank, storage cold water storage cistern, heat exchange
Device, hot water lithium bromide refrigeration machine.Other assembly includes pipeline, water pump, valve, cistern, fan coil etc..
Combustion gas internal combustion electricity generation system is respectively communicated with cigarette-water-to-water heat exchanger and water-water heat exchanger I, cigarette-water-to-water heat exchanger and water-water heat exchanger
I connects with variable power electricity heat storage water tank I and variable power electricity heat storage water tank II respectively, and solar thermal collector connects with cistern
After, connect with variable power electricity heat storage water tank I and variable power electricity heat storage water tank II；Hot water lithium bromide refrigeration machine and variable merit
Rate electricity heat storage water tank I and variable power electricity heat storage water tank II are respectively communicated with, and hot water lithium bromide refrigeration machine one end is sequentially connected in series
Accessing air conditioning system after water-water heat exchanger II, storage cold water storage cistern, the hot water lithium bromide refrigeration machine other end connects with cooling tower.
The high-temperature flue gas that gas internal combustion electric generator group produces is passed through cigarette-water-to-water heat exchanger, and the hot water selectivity displaced is passed through variable power
Electricity heat storage water tank I or variable power electricity heat storage water tank II, the flue gas after heat exchange is directly discharged into air.Internal combustion engine cylinder jacket hot water is passed through
Water water-to-water heat exchanger I, backwater flows into internal combustion engine, and B side is passed through variable power electricity heat storage water tank II after heat exchange.Solar thermal collector
When leaving water temperature reaches setting value, selectivity is passed through variable power electricity heat storage water tank I or variable power electricity heat storage water tank II.Too
Sun energy heat collector and succi Nicotiana tabacum L. heat exchanger enter water and can come from cistern, it is also possible to from electricity heat storage water tank.Hot water lithium bromide system
Cold drives hot water from variable power electricity heat storage water tank I, temperature step-down after being done work by the hot water of refrigeration machine, is passed through variable merit
Rate electricity heat storage water tank II is to provide living-hygienic hot water or heat temperature raising again.Lithium bromide refrigerator chilled water is through water-water heat exchanger
Refluxing after II, form the circulation of A side, storage cold water storage cistern and water-water heat exchanger II form the circulation of B side.The cooling of lithium bromide refrigerator
Water is passed through cooling tower cooling.The air-conditioning cold of whole system, hot blast are passed through fan coil by hot water or cold water and provide.
Cool and thermal power micro-grid system only at summer operation in cold, heat and electricity triple supply pattern, other season runs on cogeneration pattern.
Cold, heat and electricity triple supply operational mode: in system, wind-power electricity generation and photovoltaic generation work in maximum power output state all the time, protects
The peak use rate of card regenerative resource.Accumulator is according to system off-network state, it is considered to system loading situation, and peak-trough electricity
The factors such as valency are charged or discharge operation.Gas internal combustion electric generator group uses PQ to control when being incorporated into the power networks, and avoids
Frequently change output, improve unit service life.When off-network is run, internal combustion engine generator group and accumulator battery are that system carries
Voltage supplied, frequency support, wherein based on internal combustion generating set, because the output of internal combustion engine generator group has hysteresis quality, accumulator battery
Play transition assosting effect.
As it is shown in figure 1, during summer operation, by controlling cigarette-water-to-water heat exchanger B effluent amount so that it is output hot water more than 90 DEG C,
It is passed through variable power electricity heat storage water tank I storage；When solar thermal collector heat outputting coolant-temperature gage is more than 90 DEG C, it is passed through variable power
Electricity heat storage water tank I store, if due to weather reason be unable to reach 90 DEG C but higher than 50 DEG C time, then be passed through variable power electricity water storage
Case II.Internal combustion engine cylinder jacket hot water produces more than 50 DEG C hot water through water-water heat exchanger I and is passed through variable power electricity heat storage water tank II.In the summer
During Ji Yunhang, variable power electricity heat storage water tank I can provide to lithium bromide refrigerator and drive hot water, it is also possible to according to load condition
Thering is provided living-hygienic hot water, variable power electricity heat storage water tank II the most only provides living-hygienic hot water.
Lithium bromide refrigerator can be more than 75 DEG C with driving hot water temperature, and hot water source is variable power electricity heat storage water tank I, due to
The change undulatory property of refrigeration duty is relatively big, and more difficult prediction, therefore system adds storage cold water storage cistern and plays cold water memory action, bromine
Change lithium refrigeration machine chilled water is passed through water-water heat exchanger II and forms the circulation of A side, and the circulation of B side is storage cold water storage cistern side.This circulation side
Formula has two big advantages, and lithium bromide chilled water indirect refrigeration, chilled water can add particular matter, prevents from going out inside lithium bromide refrigerator
Existing incrustation scale, reduces maintenance cost, increases its service life；By controlling the B effluent amount of heat exchanger 2, by storage cold water storage cistern
Buffering, memory action, it is ensured that lithium cold freezing water outlet temperature is 7 DEG C, inlet temperature below 12 DEG C, make lithium bromide system
Cold is run in efficient district.
In system operation, photovoltaic cell, wind-driven generator electromotive power output are affected by weather, and undulatory property is bigger.In the case of grid-connected,
Unnecessary electric energy can flow to electrical network, or reduces electrical network purchase of electricity, processes fairly simple.And in the case of off-network, photovoltaic electric
Pond or output power of wind power generation can affect the frequency of system, voltage, thus affect the quality of power supply in microgrid.Traditional method is many
It is to use change internal combustion engine generator to exert oneself, with battery energy storage or directly with the relief arrangement unnecessary electric energy of consumption.But internal combustion generating
Unit output has hysteresis quality, and is difficult to the most accurately control the output of its power；Frequently accumulator cell charging and discharging can be affected again it
Service life；Relief arrangement then causes the waste of electric energy.In native system, the addition of variable power electricity heat storage water tank, can solve well
The certainly shortcoming in legacy system.In the case of electric load is constant, system output power increases, then corresponding increase electricity heat storage water tank
Heating power；System output power reduces and then reduces electricity heat storage water tank electrical heating power, still can not meet system when being reduced to zero
Burden requirement, then regulation internal combustion engine generator group, increases its output.In system, the output of internal combustion engine generator group uses " rank
Ladder control " mode, with X (kW) as unit, variable power electrical heating heat storage water tank and accumulator play energy dissolve, power
Cushioning effect.This control strategy, not only increases system run all right, it is also possible to the control reducing internal combustion engine generator group is difficult
Degree, is substantially reduced it and controls frequency, increase its service life.
During grid-connect mode, according to load and electricity price situation, it is also possible to set suitable electrical power and carry out heating water tanks energy storage, and
Set the discharge and recharge time of accumulator, to improve the economy of system, play " peak load shifting " effect.
As in figure 2 it is shown, cogeneration pattern: refrigeration machine is out of service, and system runs on cogeneration of heat and power mode, it is provided that life heat
Water and heat supply in winter hot water.Variable power electricity heat storage water tank I and variable power electricity heat storage water tank II are connected, and concrete connected mode is:
Variable power electricity heat storage water tank I top is hot water inlet, and bottom connects variable power electricity heat storage water tank II top, two water through pipeline
Box top height basically identical (No. I water tank is slightly higher), during No. I water tank full water, No. II water tank just has hot water to enter, making of hot water
It is then hot water in No. II water tank of preferential use by order.This two water tank series systems compare single layer-stepping heat storage water tank to be had more preferably
Heat insulation effect.The regulation of each micro-source electrical power is identical with during summer operation.
Fig. 3 is spring and autumn operating structure figure, and system works in cogeneration pattern equally, and the connected mode of water tank is identical with Fig. 2,
Co-feeding system is without heating hot water demand, it is only necessary to providing living-hygienic hot water, fan coil does not works at spring and autumn.
Specifically control strategy is as shown in Figure 4 and Figure 5:
Definition: internal combustion engine generator electromotive power output P1, photovoltaic electromotive power output P2, blower fan electromotive power output P3, variable power electricity
Heat storage water tank electrical power P4, accumulator output (input) electrical power P5, electric load heat outputting power PL；Electromotor output hot merit
Rate Q1, solar energy heat outputting power Q2, system cooling and heating load heat outputting power QL。
One, time-of-use tariffs situation is not considered
1, be incorporated into the power networks pattern
1) grid-connected online pattern:
System runs " electricity determining by heat " pattern of employing, owing to system is configured with heat storage water tank, internal combustion engine generator group can be made to bear by heat
Lotus predicted mean vote (deducting photo-thermal part) runs.Q1+Q2>QLTime, waste heat can be stored in heat storage water tank；Q1+Q2<QL
Time, not enough heat is supplemented by heat storage water tank, and still during deficiency, increasing combustion engine is exerted oneself or starts heat storage water tank electric heating function.In
Combustion engine Controlling principle is, it is to avoid frequently regulate output power of internal combustion engine, and unit runs in efficient district as far as possible.Accumulator battery not work
Making, unnecessary electric energy is delivered to power distribution network；Supplemented by bulk power grid during electric energy deficiency.
2) grid-connected pattern of not surfing the Net:
(1)PLKeep constant, accumulator SOC≤50%, if P2+P3Increase Δ P, then use batteries to store energy；If Δ P >=1.2X,
And duration T >=Tset, then regulation oil-electric engine group so that it is output reduces X.When accumulator reaches saturation,
Then control method is as described in (2).
(2)PLKeep constant, accumulator SOC > 50%, if P2+P3Increase Δ P, the most accordingly regulation heat storage water tank electrical heating merit
Rate；If Δ P >=1.2X, and duration T >=Tset, then oil-electric engine is regulated so that it is output reduces X, residue electricity
Power is dissolved by electricity heat storage water tank.
(3)PLKeep constant, if P2+P3Reduce Δ P.Now, if P4> 0, reduce P the most accordingly4If, P4It is decreased to zero
Still cannot compensate Δ P, then from electrical network power purchase P=Δ P-P4.If P > 0.8X, and duration T >=Tset, P1Not up to maximum,
Then P1Output increases X, and unnecessary electric energy is dissolved by electricity heat storage water tank.
(4)PLIncrease.Reduce P the most accordingly4, P4Still cannot meet when=0, then by electrical network power purchase, purchase of electricity P=PL-P4,
If P > 0.8X, and duration T >=Tset, P1Not up to maximum, then P1Increasing by " Stepped control " mode, increments is big
In P, unnecessary electric energy is dissolved by electricity heat storage water tank.
(5)PLReduce.Increase heat storage water tank electrical power P the most accordingly4, P4During >=1.2X, and duration T >=Tset, then press
Reduce oil-electric engine group according to " Stepped control " mode to exert oneself, P4Corresponding reduction, until P4<1.2X。
2. off-network operational mode
(1)PLKeep constant, accumulator SOC≤60%, if P2+P3Increase Δ P, then use batteries to store energy, until electric power storage
Pond is full of.After accumulator is full of, unnecessary electric energy is dissolved by electricity heat storage water tank, if now Δ P >=1.2X, and duration T >=Tset,
Then use Stepped control method to reduce internal combustion engine generator group to exert oneself, make P4<1.2X。
(2)PLKeep constant, accumulator SOC > 60%, if P2+P3Increase Δ P, increase heat storage water tank electrical heating merit the most accordingly
Rate；If Δ P >=1.2X, and duration T >=Tset, then regulation internal combustion engine generator group so that it is output reduces X, residue electricity
Power is dissolved by electricity heat storage water tank.
(3)PLIncrease or P2+P3Reduce Δ P.Reduce heat storage water tank electrical heating power the most accordingly, if Δ P > P4, by accumulator
Group responds rapidly to, and supplements not enough electrical power.Using Stepped control method to increase internal combustion engine generator group afterwards to exert oneself, accumulator plays
Transitional function.If P1Output has been maximum, then excise load step by step by load rating principle.
(4)PLReduce.During accumulator SOC≤60%, first accumulator is charged, until being full of.After accumulator is full of,
Unnecessary electric energy is dissolved by electricity heat storage water tank, if now Δ P >=1.2X, and duration T >=Tset, then Stepped control method is used to subtract
Little internal combustion engine generator group is exerted oneself, and makes P4<1.2X.During SOC > 60%, skip accumulator charging link.
Two, time-of-use tariffs situation is considered
If consideration time-of-use tariffs, during grid-connected network operation, internal combustion engine generator group can be made when electricity price is higher completely to send out, sell to electrical network
Unnecessary electric energy.When electricity price is relatively low, reduces internal combustion engine generator group and exert oneself, increase purchase of electricity, increase electricity heat storage water tank power simultaneously,
Energy storage is carried out with hot water form.In view of the life of storage battery configured in system and capacity factor, do not consider electricity price crest discharge,
Electricity price valley charge condition.
Although the detailed description of the invention of the present invention is described by the above-mentioned accompanying drawing that combines, but not limit to scope
System, one of ordinary skill in the art should be understood that on the basis of technical scheme, and those skilled in the art need not pay
Go out various amendments or deformation that creative work can make still within protection scope of the present invention.
Claims (8)
1. a regenerative resource cool and thermal power micro-grid system, is characterized in that, including: electricity module and cold heat module；Described electricity module
Be connected on ac bus, cold heat module by heat storage water tank as energy transferring device；System can run on according to actual needs
Cold, heat and electricity triple supply operational mode or cogeneration pattern；
Described electricity module include: solar power system, wind generator system, combustion gas internal combustion electricity generation system, accumulator battery and
Variable power electricity heat storage water tank I and variable power electricity heat storage water tank II；Solar power system be sequentially connected in series DC/DC changer and
Accessing ac bus after DC/AC changer, wind generator system is sequentially connected in series AC/DC changer and DC/AC changer is followed by
Entering ac bus, combustion gas internal combustion electricity generation system is directly accessed ac bus, and accumulator battery accesses friendship after two-way DC-AC changer
Stream bus, variable power electricity heat storage water tank is connected with ac bus, and ac bus is connected with power distribution network through PCC；
Described cold heat module includes: solar thermal collector, gas internal-combustion engine, storage cold water storage cistern, cigarette-water-to-water heat exchanger, water-water heat exchange
Device I, water-water heat exchanger II, cistern and hot water lithium bromide refrigeration machine；Gas internal-combustion engine and cigarette-water-to-water heat exchanger and water-water
Heat exchanger I is respectively communicated with, described cigarette-water-to-water heat exchanger and water-water heat exchanger I respectively with variable power electricity heat storage water tank I and variable
Power electricity heat storage water tank II connects, and after described solar thermal collector connects with cistern, changes with cigarette-water-to-water heat exchanger, water-water respectively
Hot device I, variable power electricity heat storage water tank I connect with variable power electricity heat storage water tank II；
Described hot water lithium bromide refrigeration machine is respectively communicated with variable power electricity heat storage water tank I and variable power electricity heat storage water tank II,
Air conditioning system, hot water are accessed after being sequentially connected in series water-water heat exchanger II, storage cold water storage cistern in described hot water lithium bromide refrigeration machine one end
The type lithium bromide refrigerator other end connects with cooling tower；
When system runs on cold, heat and electricity triple supply operational mode, wind generator system and solar power system work in maximum all the time
Power output state；Combustion gas internal combustion electricity generation system uses PQ to control when being incorporated into the power networks, when off-network is run, by combustion gas internal combustion
Electricity generation system and accumulator battery provide electric voltage frequency to support, wherein based on combustion gas internal combustion electricity generation system, accumulator for system jointly
Organize auxiliary transitional function；
Cigarette-water-to-water heat exchanger heat outputting coolant-temperature gage is passed through variable power electricity heat storage water tank I storage at more than design temperature A；Will too
The hot water of more than the design temperature A of sun energy heat collector output is passed through variable power electricity heat storage water tank I storage, by solar thermal collector
Hot water in the range of the design temperature [B, A] of output is passed through variable power electricity heat storage water tank II storage；By combustion gas internal combustion electricity generation system
The hot water of more than design temperature B produced through water-water heat exchanger I is passed through variable power electricity heat storage water tank II storage；
Variable power electricity heat storage water tank I provides to lithium bromide refrigerator and drives hot water, provides living-hygienic according to load condition simultaneously
Hot water, variable power electricity heat storage water tank II provides living-hygienic hot water.
2. a kind of regenerative resource cool and thermal power micro-grid system as claimed in claim 1, is characterized in that, described lithium bromide refrigerator
Chilled water refluxes after water-water heat exchanger II, forms the circulation of A side；Described water-water heat exchanger II connects with storage cold water storage cistern, is formed
B side is circulated.
3. a kind of regenerative resource cool and thermal power micro-grid system as claimed in claim 1, is characterized in that, described hot water lithium bromide
The driving hot water of refrigeration machine is provided by variable power electricity heat storage water tank I, temperature after being done work by the hot water of hot water lithium bromide refrigeration machine
Degree step-down, is passed through variable power electricity heat storage water tank II to provide living-hygienic hot water or heat temperature raising again.
4. a kind of regenerative resource cool and thermal power micro-grid system as claimed in claim 1, is characterized in that, system runs on thermoelectricity connection
During for pattern, lithium bromide refrigerator is out of service, and co-feeding system only provides electricity, two kinds of form of energy of heat；With cold, heat and electricity triple supply
Operational mode is identical, and wind generator system and solar power system work in maximum power output state all the time；Combustion gas internal combustion is sent out
Electricity system uses PQ to control under also net state, under off-network state, gas internal combustion electric generator group with accumulator battery is jointly
System provides electric voltage frequency to support, and wherein based on internal combustion engine generator, accumulator battery is auxiliary；
Variable power electricity heat storage water tank I top is hot water inlet, and bottom connects variable power electricity heat storage water tank II top through pipeline,
During variable power electricity heat storage water tank I full water, variable power electricity heat storage water tank II just has hot water to enter, and the use order of hot water is then
The preferential hot water used in variable power electricity heat storage water tank II.
5. a control method for regenerative resource cool and thermal power micro-grid system as claimed in claim 1, is characterized in that, including:
Grid-connected and off-network state under real-time monitoring system normal operating condition, does not consider time-of-use tariffs situation,
If system is in off-network state, then using " with the fixed heat of electricity " pattern, concrete control method is:
(1)PLKeep constant, and during accumulator SOC≤D1, if P2+P3Increase Δ P, then use batteries to store energy, until storing
Battery is full of；After accumulator is full of, the corresponding electrical heating power increasing variable power electricity heat storage water tank is dissolved unnecessary electric energy, if this
Time Δ P >=λ1X, and duration T >=Tset, then use Stepped control method to reduce internal combustion engine and exert oneself, make variable power electricity water storage
Case electrical power P4<λ1X；
(2)PLKeep constant, and accumulator SOC > D1 time, if P2+P3Increase Δ P, increase variable power electricity heat accumulation the most accordingly
Water tank electrical heating power；If Δ P >=λ1X, and duration T >=Tset, then internal combustion engine is regulated so that it is output reduces X, residue
Electrical power is dissolved by variable power electricity heat storage water tank；
(3)PLIncrease or P2+P3When reducing Δ P, reduce variable power electricity heat storage water tank electrical heating power the most accordingly, if
ΔP>P4, accumulator battery supplement not enough electrical power；Stepped control method increasing combustion engine is used to exert oneself afterwards, if internal combustion generating
Machine electromotive power output P1It is maximum, has then excised load step by step by load rating principle；
(4)PLReduce, and during accumulator SOC≤D1, first accumulator is charged, until being full of；After accumulator is full of,
The corresponding electrical heating power increasing variable power electricity heat storage water tank is dissolved unnecessary electric energy, if now Δ P >=λ1X, and duration T >=Tset,
Then use Stepped control method to reduce internal combustion engine to exert oneself, make variable power electricity heat storage water tank electrical power P4<λ1X；
Accumulator SOC > D1 time, skip accumulator charging link, unnecessary electric energy directly increases variable power electricity heat storage water tank electricity and adds
Thermal power；
Wherein, P1For internal combustion engine generator electromotive power output, P2For solar power system electromotive power output, P3For wind-power electricity generation system
System electromotive power output, TsetFor setting time threshold, D1, λ1For setting value, PLFor electric load power, X is internal combustion engine generator group
" Stepped control " power unit setting value.
6. the control method of regenerative resource cool and thermal power micro-grid system as claimed in claim 5, is characterized in that, if at system
In grid-connected upper net state, system runs " electricity determining by heat " pattern of employing, owing to system is configured with variable power electricity heat storage water tank,
Combustion gas internal combustion electricity generation system is made to run by heat load prediction meansigma methods；Concrete control method is:
Q1+Q2>QLTime, waste heat is stored in variable power electricity heat storage water tank；Q1+Q2<QLTime, not enough heat is by variable power
Electricity heat storage water tank supplements, and still during deficiency, increasing combustion engine is exerted oneself or starts variable power electricity heat storage water tank electric heating function；Electric power storage
Pond group does not works, and unnecessary electric energy is delivered to power distribution network；Supplemented by bulk power grid during electric energy deficiency；Wherein, Q1For electromotor heat outputting
Power, Q2For solar energy heat outputting power, QLFor system cooling and heating load.
7. the control method of regenerative resource cool and thermal power micro-grid system as claimed in claim 5, is characterized in that, if at system
In grid-connected net state of not going up, concrete control method is:
(1)PLKeep constant, during accumulator SOC≤D2, if P2+P3Increase Δ P, then use batteries to store energy；If Δ P >=λ1X,
And duration T >=Tset, then internal combustion engine is regulated so that it is output reduces X；When accumulator reaches saturation, then remain electricity
Power is for increasing the heating power of variable power electricity heat storage water tank；
(2)PLKeep constant, accumulator SOC > D2 time, if P2+P3Increase Δ P, then increase variable power electricity heat storage water tank
Electrical heating power；If Δ P >=λ1X, and duration T >=Tset, then regulate internal combustion engine so that it is output reduces X, remain electric work
Rate is dissolved by variable power electricity heat storage water tank；
(3)PLWhen keeping constant, if P2+P3Reduction Δ P, now, if variable power electricity heat storage water tank P4> 0, the most accordingly
Reduce P4If, P4It is decreased to zero and still cannot compensate Δ P, then from electrical network power purchase P=Δ P-P4；
If P > λ2X, and duration T >=Tset, electromotor electromotive power output P1Not up to maximum, then electromotor output electric work
Rate P1Output increases X, and unnecessary electric energy is dissolved by variable power electricity heat storage water tank；
(4)PLDuring increase, reduce variable power electricity heat storage water tank P the most accordingly4, P4Still cannot meet when=0, then by electrical network
Power purchase, purchase of electricity P=PL-P4If, P > λ2X, and duration T >=Tset, P1Not up to maximum, then P1By Stepped control side
Formula increases, and increments is more than P, and unnecessary electric energy is dissolved by electricity heat storage water tank；
(5)PLDuring reduction, increase variable power electricity heat storage water tank P the most accordingly4, P4≥λ1X, and duration T >=TsetTime,
Then reduce combustion gas internal combustion electricity generation system according to Stepped control mode to exert oneself, until P4<λ1X；
Wherein, P1For internal combustion engine generator electromotive power output, P2For solar power system electromotive power output, P3For wind-power electricity generation system
System electromotive power output, P4For heat storage water tank electrical heating power, TsetFor setting time threshold, D2, λ1、λ2For setting value, PL
For electric load power, X is internal combustion engine generator group " Stepped control " power unit setting value.
8. the control method of regenerative resource cool and thermal power micro-grid system as claimed in claim 5, is characterized in that, if it is considered that peak
Paddy electricity price, when system grid connection is run, makes internal combustion engine generator group completely send out when electricity price is higher, sells unnecessary electric energy to electrical network；Electricity price
Time relatively low, reduce internal combustion engine generator group and exert oneself, increase purchase of electricity, increase electricity heat storage water tank power simultaneously, carry out with hot water form
Energy storage.
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