CN108377001A - A kind of photovoltaic energy storage system and method for electricity consumption peak load shifting - Google Patents
A kind of photovoltaic energy storage system and method for electricity consumption peak load shifting Download PDFInfo
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- CN108377001A CN108377001A CN201810370324.2A CN201810370324A CN108377001A CN 108377001 A CN108377001 A CN 108377001A CN 201810370324 A CN201810370324 A CN 201810370324A CN 108377001 A CN108377001 A CN 108377001A
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- 230000005611 electricity Effects 0.000 title claims abstract description 107
- 238000004146 energy storage Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000010248 power generation Methods 0.000 claims abstract description 18
- 238000003860 storage Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 239000013589 supplement Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 2
- 230000003631 expected effect Effects 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
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- 230000000737 periodic effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Classifications
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- H02J3/383—
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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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- 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
- 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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/20—Climate change mitigation technologies for sector-wide applications using renewable energy
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention discloses a kind of photovoltaic energy storage system and method for electricity consumption peak load shifting, including：Solar panel, inverter, secondary battery unit, header box, data collector, controller and grid-connection cabinet.Data collector acquires the power generation data of solar panel, acquires the electricity data of accumulator and acquires the power consumption data of plant area's electricity system, and will generate electricity data, electricity data and power consumption data Real-time Feedback are to controller；Controller control is controlled in the peak period and is coordinated solar panel and secondary battery unit and charged to plant area's power grid power supply and in paddy period control secondary battery unit jointly and ensure that electricity is in saturation state based on power generation data, electricity data and power consumption data.By the rational deployment of solar panel and secondary battery unit, photovoltaic energy storage system according to the present invention achievees the effect that the peak load that disappears.
Description
Technical field
The present invention relates to photovoltaic generating system application fields, relate more specifically to a kind of light for electricity consumption peak load shifting
Lie prostrate energy-storage system and method.
Background technology
The huge difference of the power load of peak period and low-valley interval is brought greatly to generation, the scheduling of electric energy
It is difficult.In order to reduce the huge difference of peak-trough electricity period power demand, it is poor that the various regions Committee of Development and Reform and grid company are proposed peak-trough electricity
The policy of different electricity price, Beijing, Jiangsu general industry and commerce electricity consumption peak-trough electricity price difference reached 1 yuan/kWh, Shanghai, Guangdong, Tianjin
Etc. the general industry and commerce electricity consumption peak-trough electricity price difference on ground be more than 0.8 yuan/kWh.It is Shanghai, Jiangsu, wide for big commercial power
The electricity price between peak and valley on the ground such as east, Hainan, Jiangxi, Henan is more than 0.65 yuan/kWh.
While widening peak-trough electricity price difference, country also needs in Beijing, Tangshan, Foshan, Suzhou, the city development of five, Shanghai
Side is asked to respond business pilot, the Subscriber Unit to be dispatched in Peak power use period active response power load provides financial aid.
Electric energy needs to keep the characteristic of equilibrium,transient between having supply and demand, but since network load, generation of electricity by new energy are equal
There are periodic height fluctuation patterns, therefore either in the load valley period of power grid or smooth generation of electricity by new energy
Volume output, be required to energy-storage system carry out electric power the equilibrium of supply and demand adjust.The construction of energy-accumulating power station can be in power supply level
Bring social benefit below.
Power smooth：Intermittence and impact of the fluctuation to power grid for solving regenerative resource improve power grid power supply matter
Amount；
Energy consumption：Solution abandons wind, abandons light, abandon water, abandon the problems such as fuel；
The equilibrium of supply and demand：Alleviate the imbalance between supply and demand problem of electric energy, realizes frequency modulation, peak regulation, emergent, peak load shifting, improve energy
Source utilization rate.
Power supply is reliable：Backup battery is provided, the safety of power grid power supply is improved, realizes that the safety of the energy is most important
Barrier.
For various deficiencies existing for traditional energy storage photovoltaic plant, the new skill for the peak load that needs to disappear using photovoltaic energy storage system
Art researches and develops a kind of energy storage photovoltaic system of electricity when plant area peak is completely eliminated.
Need to meet by reasonably arranging solar panel and accumulator in on-site the power consumption of plant area peak usually section
Amount, making the peak of consumption power grid, usually electricity is zero, to reduce plant area's power consumption cost.
Invention content
The problem to be solved in the present invention is mainly that plant area electricity rates are high, problem of peak load regulation network difficulty.The mesh of the present invention
Be to provide a kind of photovoltaic energy storage system and method for electricity consumption peak load shifting.
To achieve the goals above, the present invention uses following technical scheme：
A kind of photovoltaic energy storage system for electricity consumption peak load shifting, including：Solar panel, inverter, accumulator
Unit, header box, data collector, controller and grid-connection cabinet, wherein：The solar panel connects through the inverter
Enter the header box；The secondary battery unit is directly accessed the header box；The solar panel and the accumulator list
Member is through header box access plant area power grid；The power generation data of the data collector acquisition solar panel, acquisition electric power storage
The power consumption data of the electricity data in pond and acquisition plant area electricity system, and by the power generation data, the electricity data and described
Power consumption data Real-time Feedback gives the controller；The controller control power generation number that collector acquires based on the data
According to, the electricity data and the power consumption data, is controlled in the peak period and coordinate the solar panel and the accumulator list
Member is charged to plant area's power grid power supply and in the paddy period control secondary battery unit jointly and ensures that electricity is in saturation
State, wherein the peak period refers to the peak of power consumption period, the paddy period refers to the low power consumption period of low electricity price.
Further, other periods except the peak period and paddy period, the controller are controlled the sun
The photovoltaic electricity that energy solar panel generates preferentially supplies plant area's consumption, consumes endless remaining electricity supply secondary battery unit and charges, storage
In the accumulator group of the secondary battery unit, it is not returned to plant area's power grid.
According to the peak of plant area, usually power consumption sets the installed capacity of the solar panel and the secondary battery unit
Installed capacity.
The secondary battery unit includes multiple accumulator groups, it can be achieved that discharging in charging.
By the rational deployment of solar panel and secondary battery unit, photovoltaic energy storage system according to the present invention, which reaches, to disappear
The expected effects of peak load.
Relative to traditional photovoltaic energy storage system, which may be implemented lot of advantages：First, usually according to the peak of plant area
Power consumption comes the installed capacity of rational deployment solar panel and the installed capacity of accumulator, ensures solar panel system
Maximum capacity, solar panel system passes through photovoltaic effect and generates cleaning electric energy, supply plant area electricity consumption, in the sun
When energy battery system supply not enough power supply, supplemented by accumulator electric-quantity, accumulator electric-quantity is supplemented by the paddy period at night, makes factory
Usually electricity consumption all provides (as shown in figure) to Qu Feng by solar cell system and accumulator；Second, solar cell system
Clean electric power caused by system all supplies plant area and uses, remaining to be electronically stored in accumulator, is not returned to power grid；Third, electric power storage
Pond group is divided into multiple units, it can be achieved that discharging in charging, and the intermittence and fluctuation for solving regenerative resource rush power grid
It hits, improves grid supply quality；Fourth, the peak load that disappears (as shown in Figure 2) of state's electricity power grid can be greatly facilitated, alleviate electric energy
Imbalance between supply and demand problem, realize frequency modulation, peak regulation, emergent, peak load shifting, improve energy utilization rate.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon.
Fig. 1 is electric system power demand figure；
Fig. 2 is photovoltaic energy storage system schematic according to the present invention, wherein 1 being solar panel, 2 being inverter, 3 being
Secondary battery unit, 4 be header box, 5 be data collector, 6 in order to control device, 7 be plant area's power grid, 8 be grid-connection cabinet；
Fig. 3 is plant area's power consumption peak clipping schematic diagram；
Fig. 4 is power grid peak load shifting schematic diagram.
Specific implementation mode
Technical scheme of the present invention is specifically described below in conjunction with Figure of description.
Fig. 1 is electric system power demand figure
Fig. 2 is photovoltaic energy storage system schematic according to the present invention.
As shown in Fig. 2, the photovoltaic energy storage system according to the present invention for electricity consumption peak load shifting includes：Solar cell
Plate (1), inverter (2), secondary battery unit (3), header box (4), data collector (5), controller (6) and grid-connection cabinet
(8), wherein：The solar panel accesses the header box through the inverter；The secondary battery unit is directly accessed institute
State header box；The solar panel and the secondary battery unit are through header box access plant area power grid；The data are adopted
Storage acquires the power generation data of solar panel, acquires the electricity data of accumulator and acquires the power consumption number of plant area's electricity system
According to, and give the power generation data, the electricity data and the power consumption data Real-time Feedback to the controller；The controller
Control collector acquires based on the data the power generation data, the electricity data and the power consumption data, in the peak period
Control coordinates the solar panel and the secondary battery unit and controls institute to plant area's power grid power supply and in the paddy period jointly
Secondary battery unit is stated to be charged and ensure that electricity is in saturation state, wherein the peak period refers to the peak of power consumption period, it is described
The paddy period refers to the low power consumption period of low electricity price.
According to the present invention, the paddy period at night is charged by power grid using secondary battery unit is supplied electricity at a low price, and the peak period on daytime is by light
It lies prostrate system charge and secondary battery unit to power to plant area, eliminates the high price peak value electricity consumption of plant area.
It is characteristic of the invention that the installed capacity of solar panel is in the case of Roof Resources abundance, to be capable of providing
On the basis of plant area's highest hour electricity consumption, solar panel is installed, it is secondary battery unit that the residual peak period, which consumes electricity,
Capacity；It is insufficient in Roof Resources, it is subject to the installed capacity for being paved with effective area, the residual peak period consumes electricity
The as capacity of secondary battery unit.
The present invention data collector the characteristics of for can acquire solar panel power generation data, acquisition accumulator electricity
It measures data and acquires the power consumption data of plant area's electricity system.
The controller of the present invention is controlled accumulator and is charged and protected in the paddy period by the electricity data of acquisition accumulator
Card electricity is in saturation state.
The present invention passes through control using data collector acquisition plant area electricity consumption, photovoltaic electricity and accumulator remaining capacity
It is that accumulator supplements electricity that device, which coordinates system in the paddy period, ensures that accumulator electric-quantity is in saturation state；In the peak period by adopting
For storage to the feedback of institute of plant area electricity demand, it is that plant area powers to coordinate photovoltaic system and electricity accumulating unit jointly, eliminates the peak value of plant area
Electricity consumption；Other periods, photovoltaic electricity preferentially supply plant area's consumption, consume endless part supply secondary battery unit charging.
The present invention solves the problems, such as that plant area's electricity rates are high, peak load regulation network is difficult, takes full advantage of photovoltaic energy storage system,
By the rational deployment of solar panel and secondary battery unit, reach the expected effects for the peak load that disappears.
Fig. 3 is plant area's power consumption peak clipping schematic diagram.In figure 3, S1 is photovoltaic power generation quantity curve, S2 is that plant area disappears and consumes before peak
Electric quantity curve, S3 are that plant area disappears power consumption curve behind peak.
In photovoltaic power generation quantity curve S1, photovoltaic power generation quantity increases as irradiation increases, and increases since 8 points of morning
Add, noon is in most strong state, and fall after rise in the afternoon, stops generating electricity in 5 PM, and the electricity that generated energy can be supplied to plant area daytime disappears
Consumption.
The plant area power consumption curve S2 before peak that disappears is simulation plant area power consumption curve.
The plant area power consumption curve S3 behind peak that disappears is J curve effectJ after disappearing peak using photovoltaic energy storage system, and the wherein regions Q1 are
It the national grid paddy period, is charged to secondary battery unit using national grid low-price electricity, ensures that the electricity of secondary battery unit fills
Foot；The regions Q2 are to utilize secondary battery unit electricity to supplement photovoltaic system when photovoltaic electricity is less than plant area's consumption the peak period in the morning
Generated energy meets the electrical demand of plant area peak period；When the regions Q3 and Q4 are that photovoltaic electricity is consumed more than plant area, by photovoltaic system
The generated energy of system is used for supplementing the electricity of accumulator, and power grid is reversely sent into when the electricity abundance of secondary battery unit；Q5 is afternoon
The peak period when photovoltaic electricity is less than plant area's consumption, supplements the generated energy of photovoltaic system to meet production using secondary battery unit electricity
The electrical demand of area peak period；Q6 is the paddy period at night, is that secondary battery unit supplements electricity using national grid low-price electricity.
In general, the electricity consumption of Xiao Fenghou plant areas paddy period can increase, and the electricity of peak period will be zero, be reached for plant area
Eliminate the effect of the peak value electricity of high price.
Fig. 4 is power grid peak load shifting schematic diagram.As shown in figure 4, being accumulators store electricity using the electricity of paddy period at night
Electricity is discharged at the peak period on daytime and is exported by amount, the clean electric power generated in conjunction with photovoltaic system, it is ensured that the peak of plant area
When electricity be zero, greatly reduce the load pressure of power grid peak period, reach the requirement of the peak load that disappears of national grid.
According to an embodiment of the invention, including the required solar panel of system, inverter, header box, accumulator
The equipment such as unit, collector, controller, grid-connection cabinet.The wherein installed capacity of solar panel and secondary battery unit, can
Subject to the electricity consumption for meeting the plant area peak period；Collector is by acquiring inverter, secondary battery unit, header box, plant area's power grid etc.
Information about power is fed back to controller by information in real time, then it is plant area's supply of electrical energy, control storage to control photovoltaic system by controller
The charging and discharging etc. of battery unit.
The wherein installed capacity of solar panel is small to be capable of providing plant area's highest in the case of Roof Resources abundance
When electricity consumption on the basis of, install solar panel, the residual peak period consumption electricity be secondary battery unit capacity；On roof
In the case of resource is insufficient, it is subject to the installed capacity for being paved with effective area, it is accumulator that the residual peak period, which consumes electricity,
The capacity of unit.
The clean electric power that wherein photovoltaic system generates preferentially supplies plant area's consumption, and consuming endless has controller control storage
In secondary battery unit, if secondary battery unit is in saturation state, it is sent into power grid.
Wherein secondary battery unit supplements photovoltaic in the paddy period at night using power grid supplement electricity to saturation in the peak period on daytime
The electricity of system, is plant area's load supplying, and other times are stored in electric power storage when the generated energy consumption of photovoltaic system institute is endless
Chi Zhong.
Although the present invention is described with reference to current specific embodiment, those of ordinary skill in the art
It should be appreciated that above embodiment is intended merely to illustrate the present invention, and it is not used as limitation of the invention, not departing from
Various equivalent change or replacement can also be made under the premise of present inventive concept, therefore, as long as in the connotation of the present invention
The variation, modification of above-described embodiment will all be fallen within the scope of claims of the present invention in range.
Claims (8)
1. a kind of photovoltaic energy storage system for electricity consumption peak load shifting, it is characterised in that：The system comprises solar cells
Plate, inverter, secondary battery unit, header box, data collector, controller and grid-connection cabinet, wherein：
The solar panel accesses the header box through the inverter；
The secondary battery unit is directly accessed the header box；
The solar panel and the secondary battery unit are through header box access plant area power grid；
The power generation data of the data collector acquisition solar panel, the electricity data for acquiring accumulator and acquisition plant area use
The power consumption data of electric system, and give the power generation data, the electricity data and the power consumption data Real-time Feedback to the control
Device processed；
Controller control collector acquires based on the data the power generation data, the electricity data and the power consumption
Data, the peak period control coordinate the solar panel and the secondary battery unit jointly to plant area's power grid power supply and
It is charged in the paddy period control secondary battery unit and ensures that electricity is in saturation state,
The wherein described peak period refers to the peak of power consumption period, and the paddy period refers to the low power consumption period of low electricity price.
2. photovoltaic energy storage system as described in claim 1, it is characterised in that：Other except the peak period and paddy period
The photovoltaic electricity that the solar panel generates preferentially is supplied plant area's consumption by period, the controller control, and consumption is endless
It is remaining electricity supply secondary battery unit charging, be stored in the accumulator group of the secondary battery unit, be not returned to plant area's power grid.
3. photovoltaic energy storage system as described in claim 1, it is characterised in that：According to the usually power consumption setting of the peak of plant area
The installed capacity of the installed capacity of solar panel and the secondary battery unit.
4. photovoltaic energy storage system as described in claim 1, it is characterised in that：The secondary battery unit includes multiple accumulators
Group in charging, it can be achieved that discharge.
5. a kind of electricity consumption peak load shifting method using photovoltaic energy storage system, it is characterised in that：The photovoltaic energy storage system packet
It includes, solar panel, inverter, secondary battery unit, header box, data collector, controller and grid-connection cabinet, wherein：Institute
Solar panel is stated to couple with the header box through the inverter；The secondary battery unit directly with the header box coupling
It closes；The solar panel and the secondary battery unit access plant area's power grid through the header box, the method includes：
The power generation data of solar panel, the electricity data for acquiring accumulator and acquisition factory are acquired using the data collector
The power consumption data of area's electricity system, and by the power generation data, the electricity data and the power consumption data Real-time Feedback to institute
State controller；
The power generation data, the electricity data and the power consumption data of collector acquisition based on the data, in the peak period,
The controller control coordinates the solar panel and the secondary battery unit jointly to plant area's power grid power supply and in paddy
Period controls the secondary battery unit and is charged and ensure that electricity is in saturation state,
The wherein described peak period refers to the peak of power consumption period, and the paddy period refers to the low power consumption period of low electricity price.
6. utilizing the electricity consumption peak load shifting method of photovoltaic energy storage system as claimed in claim 5, it is characterised in that：Described
Other periods except peak period and paddy period, the photovoltaic electricity that the controller control generates the solar panel are excellent
The consumption of first supply plant area consumes endless remaining electricity supply secondary battery unit charging, is stored in the accumulator of the secondary battery unit
In group, it is not returned to plant area's power grid.
7. utilizing the electricity consumption peak load shifting method of photovoltaic energy storage system as claimed in claim 5, it is characterised in that：According to factory
The peak in area usually power consumption set the solar panel installed capacity and the secondary battery unit installed capacity.
8. utilizing the electricity consumption peak load shifting method of photovoltaic energy storage system as claimed in claim 5, it is characterised in that：The storage
Battery unit includes multiple accumulator groups, it can be achieved that discharging in charging.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810370324.2A CN108377001B (en) | 2018-04-24 | 2018-04-24 | Photovoltaic energy storage system and method for peak clipping and valley filling of electricity consumption |
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| CN201810370324.2A CN108377001B (en) | 2018-04-24 | 2018-04-24 | Photovoltaic energy storage system and method for peak clipping and valley filling of electricity consumption |
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| CN108377001A true CN108377001A (en) | 2018-08-07 |
| CN108377001B CN108377001B (en) | 2024-02-06 |
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| CN108377001B (en) | 2024-02-06 |
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