CN110336331A - A kind of time-division transfer method and device of photovoltaic ice storage unit - Google Patents
A kind of time-division transfer method and device of photovoltaic ice storage unit Download PDFInfo
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- CN110336331A CN110336331A CN201910550241.6A CN201910550241A CN110336331A CN 110336331 A CN110336331 A CN 110336331A CN 201910550241 A CN201910550241 A CN 201910550241A CN 110336331 A CN110336331 A CN 110336331A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012546 transfer Methods 0.000 title claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 63
- 238000006243 chemical reaction Methods 0.000 claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 95
- 230000005611 electricity Effects 0.000 claims description 31
- 238000010248 power generation Methods 0.000 claims description 14
- 238000005286 illumination Methods 0.000 claims description 11
- 238000005057 refrigeration Methods 0.000 claims description 11
- 238000005457 optimization Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 3
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- 238000002955 isolation Methods 0.000 claims description 3
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- 238000004590 computer program Methods 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 239000008400 supply water Substances 0.000 claims description 2
- 238000011217 control strategy Methods 0.000 abstract description 5
- 238000004378 air conditioning Methods 0.000 description 11
- 230000008676 import Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
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- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
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- H02J3/383—
-
- 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
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention discloses a kind of time-division transfer method and device of photovoltaic ice storage unit.Wherein, this method comprises: in alternating current peak period, control frequency conversion centrifugal compressor, which enters photovoltaic, can directly drive ice-storage mode, determine corresponding ice-reserving running frequency according to photovoltaic generation power in real time or periodically, and control frequency conversion centrifugal compressor carries out ice-reserving according to ice-reserving running frequency；It in alternating current low-valley interval, controls frequency conversion centrifugal compressor and enters alternating current ice-storage mode, cooling capacity parameter is calculated according to operating parameter and Weather information, ice-reserving running frequency is determined according to cooling capacity parameter, control frequency conversion centrifugal compressor carries out ice-reserving according to ice-reserving running frequency.Through the invention, based on making full use of to utility grid low-valley interval, framework and operation control strategy that photovoltaic directly drives variable frequency centrifuge group and ice-storage system are had developed.To promote the energy-conserving and environment-protective performance of unit, operating cost is reduced, reducing the impact on power grid influences, and reduces the demand to power grid dilatation.
Description
Technical field
The present invention relates to machine set technology fields, in particular to a kind of time-division transfer side of photovoltaic ice storage unit
Method and device.
Background technique
Large Central Air Conditioning System energy consumption accounting is huge, is affected to the impact and Peak power use of power grid.For traditional power grid
How the phenomenon that running, being constantly present peak of power consumption and low power consumption, promote the smooth adjustment of peak valley, and power grid releases time-of-use tariffs
The measure of difference promotes the transformation of user's application method with price control means, and guidance electricity consumption side actively adjusts the electricity consumption period, wrong
Peak electricity consumption.Ice storage machine set system utilizes night low power consumption refrigeration and cold accumulation, does not run in the peak times of power consumption unit on daytime, leads to
It crosses electricity price between peak and valley and obtains income, reduce systematic running cost use, have a preferable steady effect to power grid.To maintenance power grid
Stabilization is of great significance.
PV air-conditioner can utilize solar power generation on daytime, preferably meet and adapt to and utilize building air conditioning thermic load curve
It is obvious to the stability action of operation of power networks with the consistency of solar irradiation radiation intensity curve.Due to photovoltaic generation power with
Intensity of illumination real-time change, with unstable characteristic, previous a very long time is always to direct utilize of photovoltaic power generation
One technical problem.
Photovoltaic ice-storage air-conditioning combines PV air-conditioner with ice-storage air-conditioning, will generate better energy-saving and emission-reduction, drop
The effect of low operating cost.In order to further decrease Large Central Air Conditioning System energy consumption and to the dependence of power grid, in conjunction with photovoltaic power generation system
System, photovoltaic ice storage unit will further improve the efficient local use of the distributed photovoltaic energy, air-conditioning are further effectively reduced
Unit equipment runs the requirement to the capacity of power grid, reduces the use operating cost of air-conditioning, has to social energy conservation emission reduction important
Meaning.
It is run for the control for how combining the electricity consumption period of alternating current accordingly to adjust photovoltaic ice storage unit in the prior art
The problem of, currently no effective solution has been proposed.
Summary of the invention
A kind of time-division transfer method and device of photovoltaic ice storage unit is provided in the embodiment of the present invention, it is existing to solve
The problem of how combining the electricity consumption period of alternating current accordingly to adjust the control operation of photovoltaic ice storage unit in technology.
In order to solve the above technical problems, the present invention provides a kind of time-division transfer method of photovoltaic ice storage unit,
In, this method comprises: judgement is currently at alternating current peak period or alternating current low-valley interval, in alternating current peak period, control light
The frequency conversion centrifugal compressor of volt ice storage unit, which enters photovoltaic, can directly drive ice-storage mode, in real time or periodically according to photovoltaic power generation
Power determines corresponding ice-reserving running frequency, controls the frequency conversion centrifugal compressor and is stored according to the ice-reserving running frequency
Ice；In alternating current low-valley interval, controls frequency conversion centrifugal compressor and enter alternating current ice-storage mode, according to operating parameter and Weather information meter
Cooling capacity parameter is calculated, ice-reserving running frequency is determined according to the cooling capacity parameter, controls the frequency conversion centrifugal compressor according to the storage
Ice running frequency carries out ice-reserving.
Further, corresponding ice-reserving running frequency is determined according to photovoltaic generation power in real time or periodically, comprising: real
When or periodically monitor intensity of illumination；Photovoltaic generation power is determined according to the intensity of illumination；According to the photovoltaic power generation function
Rate determines corresponding ice-reserving running frequency；Wherein, it is preset with the corresponding relationship of photovoltaic generation power and ice-reserving running frequency.
Further, the operating parameter includes: water flow velocity, inflow temperature, leaving water temperature, and the cooling capacity parameter includes:
Storage cooling capacity, the consumption cooling capacity, refrigeration requirement, next day prediction refrigerating capacity of ice storage unit.
Further, cooling capacity parameter is calculated according to operating parameter and Weather information, comprising: the ice-reserving for monitoring ice storage unit follows
Water flow velocity, inflow temperature, the leaving water temperature of ring calculate the storage of ice storage unit according to the water flow velocity, inflow temperature, leaving water temperature
Deposit cooling capacity；According to heat exchanger initial cycle water flow velocity, inflow temperature, leaving water temperature, the consumption cooling capacity of ice storage unit is calculated；According to
The temperature on average of following 24 hours of local weather forecasting sets refrigeration requirement according to the temperature on average；According to monthly average spoke
Illumination and local Weather information, the next day prediction refrigerating capacity that prediction photovoltaic power generation generates.
Further, ice-reserving running frequency is determined according to the cooling capacity parameter, comprising: obtaining alternating current by following formula needs
Ask refrigerating capacity, city's electricity demanding refrigerating capacity=refrigeration requirement-prediction in next day refrigerating capacity-cold-storage surplus；Wherein, described
Cold-storage surplus=storage cooling capacity-consumption the cooling capacity；The alternating current for needing to consume is determined according to city's electricity demanding refrigerating capacity
Electricity is run, corresponding ice-reserving running frequency is determined according to city's electricity operation electricity.
Further, the alternating current peak period is 7 points to 23 points, and the alternating current low-valley interval is 23 points to 7 points of next day.
The present invention also provides a kind of photovoltaic ice storage units, wherein the photovoltaic ice storage unit includes: to be sequentially connected
Solar energy photovoltaic panel, photovoltaic combiner box, the airborne current transformer of photovoltaic, frequency conversion centrifugal compressor and ice storage unit, heat exchanger,
Load end；Photovoltaic electric after acquiring photovoltaic power generation, is passed through the photovoltaic combiner box, described in input by the solar energy photovoltaic panel
The airborne current transformer of photovoltaic；The airborne current transformer of photovoltaic, for photovoltaic electric unsteady flow directly to be driven the frequency conversion centrifugal compressor；
It also can receive alternating current simultaneously, after alternating current unsteady flow, drive the frequency conversion centrifugal compressor；The frequency conversion centrifugal compressor is used
In offer ice-reserving；The heat exchanger, for realizing the isolation between the ice storage unit and the load end.
Further, the photovoltaic ice storage unit further include: the first water pump is arranged in the ice storage unit and the change
Between frequency centrifugal compressor, for realizing the circulation of the refrigerating medium of the ice storage unit；Second water pump, setting are filled in the ice-reserving
It sets between the heat exchanger, supplies control for realizing the primary cooling capacity of the heat exchanger；Third water pump, setting are changed described
Between hot device and the load end, for the cooling capacity of the heat exchanger to be transported to the load end, the load is realized
The cooling supply chilled water of end recycles.
Further, first water pump and second water pump are variable frequency adjustment water pumps.
The present invention also provides a kind of system optimization control devices based on photovoltaic ice storage unit, wherein described device
It include: peak processing module, in alternating current peak period, control frequency conversion centrifugal compressor, which enters photovoltaic, can directly to drive ice-reserving mould
Formula determines corresponding ice-reserving running frequency according to photovoltaic generation power in real time or periodically, controls the frequency conversion centrifugal compressed
Machine carries out ice-reserving according to the ice-reserving running frequency；Low ebb processing module, for controlling frequency conversion centrifugation pressure in alternating current low-valley interval
Contracting machine enters alternating current ice-storage mode, calculates cooling capacity parameter according to operating parameter and Weather information, is determined according to the cooling capacity parameter
Ice-reserving running frequency controls the frequency conversion centrifugal compressor according to the ice-reserving running frequency and carries out ice-reserving.
Further, described device further include: analysis module, the leaving water temperature, cold for real-time monitoring heat exchanger secondary
Freeze circulating water flow speed, return water temperature, according to the leaving water temperature, the refrigerating cycle water flow velocity degree, the return water temperature meter
The cooling capacity that the calculation same day has consumed, and analyze prediction load variations trend；Testing pump module, for adjusting the operation of the first water pump
Frequency, to meet the best ice-reserving running frequency of ice storage unit；It is also used to control the second water pump according to the load variations trend
Running frequency, to adjust the primary cooling supply water flow size of heat exchanger, to adjust cooling capacity supply；It is also used to control third water pump
Running frequency to adjusting water flow size, to stablize the leaving water temperature of the heat exchanger.
Further, described device is integrated on the airborne current transformer of photovoltaic, alternatively, described device is independently of the photovoltaic ice
Cold-storage unit.
The present invention also provides a kind of computer readable storage mediums, are stored thereon with computer program, which is characterized in that
Above-mentioned method is realized when described program is executed by processor.
It applies the technical scheme of the present invention, is predicted by generating electricity to photovoltaic centrifuge, while based on to utility grid low ebb
Period makes full use of, and has developed framework and operation control strategy that photovoltaic directly drives variable frequency centrifuge group and ice-storage system.From
And the energy-conserving and environment-protective performance of unit is promoted, operating cost is reduced, reducing the impact on power grid influences, and reduces the need to power grid dilatation
It asks.
Detailed description of the invention
Fig. 1 is the flow chart of the time-division transfer method of photovoltaic ice storage unit according to an embodiment of the present invention；
Fig. 2 is the double working modes schematic diagram of photovoltaic ice storage unit according to an embodiment of the present invention；
Fig. 3 is the system architecture diagram of photovoltaic ice storage unit according to an embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning, " a variety of " generally comprise at least two.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
Depending on context, word as used in this " if ", " if " can be construed to " ... when " or
" when ... " or " in response to determination " or " in response to detection ".Similarly, context is depended on, phrase " if it is determined that " or " such as
Fruit detection (condition or event of statement) " can be construed to " when determining " or " in response to determination " or " when detection (statement
Condition or event) when " or " in response to detection (condition or event of statement) ".
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
Include, so that commodity or device including a series of elements not only include those elements, but also including not clear
The other element listed, or further include for this commodity or the intrinsic element of device.In the feelings not limited more
Under condition, the element that is limited by sentence "including a ...", it is not excluded that in the commodity or device for including the element also
There are other identical elements.
The alternative embodiment that the invention will now be described in detail with reference to the accompanying drawings.
Embodiment one
Fig. 1 is the flow chart of the time-division transfer method of photovoltaic ice storage unit according to an embodiment of the present invention, such as Fig. 1 institute
Show, method includes the following steps:
Step S101, judgement are currently at alternating current peak period or alternating current low-valley interval；
Step S102, in alternating current peak period, the frequency conversion centrifugal compressor for controlling photovoltaic ice storage unit enters photovoltaic energy
It is straight to drive ice-storage mode, corresponding ice-reserving running frequency in real time or is periodically determined according to photovoltaic generation power, control frequency conversion from
Heart compressor carries out ice-reserving according to ice-reserving running frequency；
Step S103 controls frequency conversion centrifugal compressor and enters alternating current ice-storage mode, joined according to operation in alternating current low-valley interval
Several and Weather information calculates cooling capacity parameter, determines ice-reserving running frequency according to cooling capacity parameter, control frequency conversion centrifugal compressor according to
Ice-reserving running frequency carries out ice-reserving.
Through this embodiment, it is predicted by generating electricity to photovoltaic centrifuge, while based on being filled to utility grid low-valley interval
Divide and utilize, has developed framework and operation control strategy that photovoltaic directly drives variable frequency centrifuge group and ice-storage system.It is to be promoted
The energy-conserving and environment-protective performance of system reduces operating cost, and reducing the impact on power grid influences, and reduces the demand to power grid dilatation.
When photovoltaic directly can drive ice-storage mode, determine that corresponding ice-reserving is transported according to photovoltaic generation power in real time or periodically
Line frequency can be realized by following preferred embodiment: monitor intensity of illumination in real time or periodically；It is true according to intensity of illumination
Determine photovoltaic generation power；Corresponding ice-reserving running frequency is determined according to photovoltaic generation power；Wherein, it is preset with photovoltaic generation power
With the corresponding relationship of ice-reserving running frequency.Based on this, ice-reserving running frequency timely can be adjusted according to illumination variation, guarantee to become
Frequency centrifugal compressor is in best ice-reserving state, and the ice storage amount under ice-storage mode can directly be driven by improving photovoltaic.
In alternating current ice-storage mode, above-mentioned operating parameter includes: water flow velocity, inflow temperature, leaving water temperature, cooling capacity parameter packet
It includes: storage cooling capacity, the consumption cooling capacity, refrigeration requirement, next day prediction refrigerating capacity of ice storage unit.According to operating parameter and weather
Information calculates cooling capacity parameter, can be realized by following preferred embodiment:
S1 monitors water flow velocity, the inflow temperature, leaving water temperature of the ice-reserving circulation of ice storage unit, according to water flow velocity, water inlet temperature
Degree, leaving water temperature calculate the storage cooling capacity Qc of ice storage unit；
S2 calculates the consumption cooling capacity of ice storage unit according to heat exchanger initial cycle water flow velocity, inflow temperature, leaving water temperature
Qy；
S3 sets refrigeration requirement according to the temperature on average according to following 24 hours temperature on average of local weather forecasting
Qq；
S4, according to monthly average irradiance and local Weather information, the prediction in next day that prediction photovoltaic power generation generates
Refrigerating capacity Qf.
Wherein,
The import of the ice-reserving circulation of ice storage unit is labeled as 5, exit marking 6；Import for SAPMAC method is labeled as 3, out
Mouth is labeled as 4；The import of heat exchanger is labeled as 2, exit marking 1.
Wherein, t indicates accumulated time, CvIndicate that the heat absorption capacity coefficient of refrigerating medium, ρ indicate the density of refrigerating medium, V1Indicate water pump
1 recirculated water flow velocity, S1Indicate the circulating water pipeline section product of water pump 1, V2Indicate the recirculated water flow velocity of water pump 2, S2Indicate water pump
2 circulating water pipeline section product, T indicate the temperature sampling value of each outlet or import.Such as T3Indicate the cooling supply of ice storage unit
The temperature sampling value of the import 3 of circulation.
Ice-reserving running frequency is determined according to cooling capacity parameter, can be realized by following preferred embodiment: by following public affairs
Formula obtains city's electricity demanding refrigerating capacity, more than city's electricity demanding refrigerating capacity=refrigeration requirement Qq- lower day prediction refrigerating capacity Qf- cold-storage
Measure Qs；Wherein, consumption cooling capacity Qy described in storage cooling capacity Qc- described in the cold-storage surplus Qs=；It is true according to city's electricity demanding refrigerating capacity
The city's electricity operation electricity for needing to consume calmly determines corresponding ice-reserving running frequency according to city's electricity operation electricity.
Based on this, most accurate required ice storage amount can be determined in conjunction with Weather information, to rationally alternating current be utilized to carry out
Ice-reserving guarantees alternating current utilization rate highest, avoids wasting, save the cost.
Fig. 2 is the double working modes schematic diagram of photovoltaic ice storage unit according to an embodiment of the present invention, as shown in Fig. 2,
Alternating current peak period on daytime-, photovoltaic ice storage unit carries out ice-reserving using mode one (photovoltaic can directly drive ice-reserving), in night-city
Electric low-valley interval, photovoltaic ice storage unit carry out ice-reserving using mode two (alternating current invariable power ice-reserving).It should be noted that general
In the case of, alternating current peak period involved in the present embodiment is 7 points to 23 points, and alternating current low-valley interval is 23 points to 7 points of next day.When
So, alternating current peak period and alternating current low-valley interval can also be adjusted according to factors such as local geographical location, solar term, user demands
The specific time.Such as in the longer place of light application time or solar term, alternating current peak period can be extended.
Embodiment two
Fig. 3 is the system architecture diagram of photovoltaic ice storage unit according to an embodiment of the present invention, as shown in figure 3, photovoltaic ice stores
Cold group includes: sequentially connected solar energy photovoltaic panel, photovoltaic combiner box, the airborne current transformer of photovoltaic, frequency conversion centrifugal compressor, with
And ice storage unit, heat exchanger, load end；Wherein,
Photovoltaic electric after acquiring photovoltaic power generation, is passed through photovoltaic combiner box, inputs the airborne unsteady flow of photovoltaic by solar energy photovoltaic panel
Device；
The airborne current transformer of photovoltaic, for photovoltaic electric unsteady flow directly to be driven frequency conversion centrifugal compressor；It also can receive simultaneously
Alternating current drives frequency conversion centrifugal compressor after alternating current unsteady flow；
Frequency conversion centrifugal compressor, for providing ice-reserving；
Heat exchanger, for realizing the isolation between ice storage unit and load end.
Photovoltaic ice storage unit further include:
First water pump (water pump 1 as shown in Figure 3) is arranged between ice storage unit and frequency conversion centrifugal compressor, for real
The circulation of the refrigerating medium of existing ice storage unit.
Second water pump (water pump 2 as shown in Figure 3) is arranged between ice storage unit and heat exchanger, for realizing heat exchanger
Primary cooling capacity supply control；
Third water pump (water pump 3 as shown in Figure 3), setting is between heat exchanger and load end, for by heat exchanger
Cooling capacity is transported to load end, realizes the cooling supply chilled water circulation of load end.
Wherein, the first water pump and the second water pump are variable frequency adjustment water pumps.
Photovoltaic ice storage unit combines PV air-conditioner with ice-storage air-conditioning, will generate better energy-saving and emission-reduction, drop
The effect of low operating cost.In order to further decrease Large Central Air Conditioning System energy consumption and to the dependence of power grid, in conjunction with photovoltaic power generation system
System, photovoltaic ice storage unit will further improve the efficient local use of the distributed photovoltaic energy, air-conditioning are further effectively reduced
Unit equipment runs the requirement to the capacity of power grid, reduces the use operating cost of air-conditioning.
Embodiment three
Introduce the system optimization control device based on above-mentioned photovoltaic ice storage unit again below, which includes:
Peak processing module, in alternating current peak period, control frequency conversion centrifugal compressor, which enters photovoltaic, can directly to drive ice-reserving
Mode determines corresponding ice-reserving running frequency according to photovoltaic generation power in real time or periodically, controls frequency conversion centrifugal compressor
Ice-reserving is carried out according to ice-reserving running frequency.
Low ebb processing module, for controlling frequency conversion centrifugal compressor and entering alternating current ice-storage mode, root in alternating current low-valley interval
Cooling capacity parameter is calculated according to operating parameter and Weather information, ice-reserving running frequency, control frequency conversion centrifugation pressure are determined according to cooling capacity parameter
Contracting machine carries out ice-reserving according to ice-reserving running frequency.
It based on this, is predicted by generating electricity to photovoltaic centrifuge, while based on being made full use of to utility grid low-valley interval,
Have developed framework and operation control strategy that photovoltaic directly drives variable frequency centrifuge group and ice-storage system.To the energy conservation of lifting system
Environmental-protecting performance reduces operating cost, and reducing the impact on power grid influences, and reduces the demand to power grid dilatation.
The system optimization control device further include:
Analysis module, leaving water temperature, refrigerating cycle water flow velocity degree, return water temperature for real-time monitoring heat exchanger secondary,
According to the cooling capacity that leaving water temperature, refrigerating cycle water flow velocity degree, the return water temperature calculating same day have consumed, and analyze prediction load variations
Trend；
Qx=Cv2ρ2V3S3(T2-T1)；
Wherein, the cooling capacity that the Qx expression same day has consumed, V3Indicate the recirculated water flow velocity of water pump 3, S3Indicate the circulation of water pump 3
Waterpipe section product, T indicate each mouthful of temperature sampling value, Cv2Indicate the heat absorption capacity coefficient of end chilled water, ρ2Indicate that end is cold
The density of matchmaker's water.
Testing pump module, for adjusting the running frequency of the first water pump, to meet the best ice-reserving operation of ice storage unit
Frequency；It is also used to control the running frequency of the second water pump according to load variations trend, to adjust the primary of heat exchanger for cold water
Size is flowed, to adjust cooling capacity supply；It is also used to control the running frequency of third water pump to adjust water flow size, to stablize heat exchange
The leaving water temperature of device.
Above system optimal control device can integrate on the airborne current transformer of photovoltaic, alternatively, can also be independently of photovoltaic
Ice storage unit.System optimization control device is by acquisition data unit operation, and output control refers to after Data Analysis Services
It enables, adjusts the optimization operation of photovoltaic ice storage unit.
To sum up, in 7 points to 23 points of the alternating current peak period on daytime, system optimization control device controls frequency conversion centrifugal compressed
Machine does not consume alternating current, directly drives variable frequency centrifuge ice-reserving only with photovoltaic power generation.Control the ice-reserving fortune of frequency conversion centrifugal compressor
Line frequency is determined according to the photovoltaic generation power under the influence of intensity of illumination, as corresponding adjusting is done in the variation of intensity of illumination.
The alternating current low-valley interval of 23 points at night to 7 points of morning next day, control frequency conversion centrifugal compressor can open alternating current
Ice-reserving is controlled frequency conversion centrifugal compressor and is worked with stable frequency and level of power consumption, stablizes power grid.In 23 point moments, meter
The city's electricity operation electricity for needing to consume is calculated, to obtain ice-reserving running frequency, frequency conversion centrifugal compressor is controlled and is transported with constant power
Row is to 7 points of morning next day.
Example IV
The embodiment of the invention provides a kind of nonvolatile computer storage media, the computer storage medium is stored with
The photovoltaic ice storage unit in above-mentioned any means embodiment can be performed in computer executable instructions, the computer executable instructions
Time-division transfer method.
From the above description it is found that the present invention mainly realizes the following:
1) photovoltaic directly drives system control architecture of the variable frequency centrifuge in conjunction with ice-storage system；
2) Optimal Control Strategy realizes the output-constant operation preferentially utilized using photovoltaic and power grid low-valley interval electric power；
3) system optimization control device needs cooling capacity stock's monitoring and prediction photovoltaic power generation preparation cooling capacity and cooling capacity
The prediction technique asked.
To the energy-conserving and environment-protective performance of lifting system, operating cost is reduced, reducing the impact on power grid influences, and reduces to electricity
The demand of net dilatation.
The apparatus embodiments described above are merely exemplary, wherein described, unit can as illustrated by the separation member
It is physically separated with being or may not be, component shown as a unit may or may not be physics list
Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of the modules achieve the purpose of the solution of this embodiment.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Method described in certain parts of example or embodiment.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (13)
1. a kind of time-division transfer method of photovoltaic ice storage unit, which is characterized in that the described method includes:
Judge that current time is in alternating current peak period or alternating current low-valley interval；
In alternating current peak period, the frequency conversion centrifugal compressor for controlling photovoltaic ice storage unit, which enters photovoltaic, can directly drive ice-storage mode,
Corresponding ice-reserving running frequency is determined according to photovoltaic generation power in real time or periodically, the frequency conversion centrifugal compressor is controlled and presses
Ice-reserving is carried out according to the ice-reserving running frequency；
In alternating current low-valley interval, controls frequency conversion centrifugal compressor and enter alternating current ice-storage mode, according to operating parameter and Weather information
Cooling capacity parameter is calculated, ice-reserving running frequency is determined according to the cooling capacity parameter, controls the frequency conversion centrifugal compressor according to described
Ice-reserving running frequency carries out ice-reserving.
2. the method according to claim 1, wherein in real time or periodically according to determining pair of photovoltaic generation power
The ice-reserving running frequency answered, comprising:
Intensity of illumination is monitored in real time or periodically；
Photovoltaic generation power is determined according to the intensity of illumination；
Corresponding ice-reserving running frequency is determined according to the photovoltaic generation power；Wherein, photovoltaic generation power and ice-reserving are preset with
The corresponding relationship of running frequency.
3. the method according to claim 1, wherein the operating parameter includes: water flow velocity, inflow temperature, goes out
Coolant-temperature gage, the cooling capacity parameter include: the storage cooling capacity of ice storage unit, consumption cooling capacity, refrigeration requirement, the refrigeration of prediction in next day
Amount.
4. according to the method described in claim 3, it is characterized in that, calculate cooling capacity parameter according to operating parameter and Weather information,
Include:
Monitor ice storage unit ice-reserving circulation water flow velocity, inflow temperature, leaving water temperature, according to the water flow velocity, inflow temperature,
The storage cooling capacity of leaving water temperature calculating ice storage unit；
According to heat exchanger initial cycle water flow velocity, inflow temperature, leaving water temperature, the consumption cooling capacity of ice storage unit is calculated；
According to following 24 hours temperature on average of local weather forecasting, refrigeration requirement is set according to the temperature on average；
According to monthly average irradiance and local Weather information, the next day prediction refrigerating capacity that prediction photovoltaic power generation generates.
5. the method according to claim 3 or 4, which is characterized in that ice-reserving running frequency is determined according to the cooling capacity parameter,
Include:
City's electricity demanding refrigerating capacity, city's electricity demanding refrigerating capacity=refrigeration requirement-prediction in next day are obtained by following formula
Refrigerating capacity-cold-storage surplus；Wherein, the cold-storage surplus=storage cooling capacity-consumption cooling capacity；
The city's electricity operation electricity for needing to consume is determined according to city's electricity demanding refrigerating capacity, is determined according to city's electricity operation electricity
Corresponding ice-reserving running frequency.
6. the method according to any one of claims 1 to 5, which is characterized in that
The alternating current peak period is 7 points to 23 points, and the alternating current low-valley interval is 23 points to 7 points of next day.
7. a kind of photovoltaic ice storage unit, which is characterized in that the photovoltaic ice storage unit includes: sequentially connected solar energy
Lie prostrate plate, photovoltaic combiner box, the airborne current transformer of photovoltaic, frequency conversion centrifugal compressor and ice storage unit, heat exchanger, load end；
Photovoltaic electric after acquiring photovoltaic power generation, is passed through the photovoltaic combiner box, inputs the photovoltaic machine by the solar energy photovoltaic panel
Carry current transformer；
The airborne current transformer of photovoltaic, for photovoltaic electric unsteady flow directly to be driven the frequency conversion centrifugal compressor；It simultaneously can also be with
It receives alternating current and drives the frequency conversion centrifugal compressor after alternating current unsteady flow；
The frequency conversion centrifugal compressor, for providing ice-reserving；
The heat exchanger, for realizing the isolation between the ice storage unit and the load end.
8. photovoltaic ice storage unit according to claim 7, which is characterized in that the photovoltaic ice storage unit further include:
First water pump is arranged between the ice storage unit and the frequency conversion centrifugal compressor, for realizing the ice storage unit
Refrigerating medium circulation；
Second water pump is arranged between the ice storage unit and the heat exchanger, for realizing the primary cooling capacity of the heat exchanger
Supply control；
Third water pump is arranged between the heat exchanger and the load end, for the cooling capacity of the heat exchanger to be transported to
The cooling supply chilled water circulation of the load end is realized in the load end.
9. photovoltaic ice storage unit according to claim 8, which is characterized in that
First water pump and second water pump are variable frequency adjustment water pumps.
10. a kind of system optimization control device based on photovoltaic ice storage unit described in any one of claim 7 to 9,
It is characterized in that, described device includes:
Peak processing module was used in alternating current peak period, and control frequency conversion centrifugal compressor, which enters photovoltaic, can directly drive ice-storage mode,
Corresponding ice-reserving running frequency is determined according to photovoltaic generation power in real time or periodically, the frequency conversion centrifugal compressor is controlled and presses
Ice-reserving is carried out according to the ice-reserving running frequency；
Low ebb processing module, for controlling frequency conversion centrifugal compressor and entering alternating current ice-storage mode, according to fortune in alternating current low-valley interval
Row parameter and Weather information calculate cooling capacity parameter, determine ice-reserving running frequency according to the cooling capacity parameter, control the frequency conversion from
Heart compressor carries out ice-reserving according to the ice-reserving running frequency.
11. system optimization control device according to claim 10, which is characterized in that described device further include:
Analysis module, leaving water temperature, refrigerating cycle water flow velocity degree, return water temperature for real-time monitoring heat exchanger secondary, according to
The leaving water temperature, the refrigerating cycle water flow velocity degree, the return water temperature calculate the cooling capacity consumed on the same day, and analyze prediction
Load variations trend；
Testing pump module, for adjusting the running frequency of the first water pump, to meet the best ice-reserving running frequency of ice storage unit；
It is also used to control the running frequency of the second water pump according to the load variations trend, to adjust the primary cooling supply water flow of heat exchanger
Size, to adjust cooling capacity supply；It is also used to control the running frequency of third water pump to adjust water flow size, to change described in stabilization
The leaving water temperature of hot device.
12. system optimization control device according to claim 10, which is characterized in that
Described device is integrated on the airborne current transformer of photovoltaic, alternatively, described device is independently of the photovoltaic ice storage unit.
13. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that described program is processed
Such as method described in any one of claims 1 to 6 is realized when device executes.
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