CN203788037U - Photovoltaic power generation energy storage module hybrid deployment system - Google Patents
Photovoltaic power generation energy storage module hybrid deployment system Download PDFInfo
- Publication number
- CN203788037U CN203788037U CN201420182259.8U CN201420182259U CN203788037U CN 203788037 U CN203788037 U CN 203788037U CN 201420182259 U CN201420182259 U CN 201420182259U CN 203788037 U CN203788037 U CN 203788037U
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- Prior art keywords
- lead
- bidirectional energy
- lithium battery
- switch
- energy
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- 238000004146 energy storage Methods 0.000 title claims abstract description 51
- 238000010248 power generation Methods 0.000 title claims abstract description 13
- 239000002253 acid Substances 0.000 claims abstract description 51
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 34
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 33
- 230000005611 electricity Effects 0.000 claims description 21
- 238000002360 preparation method Methods 0.000 claims description 8
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Classifications
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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
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model discloses a photovoltaic power generation energy storage module hybrid deployment system. The system comprises a plurality of battery packs, bidirectional energy storage inverters, double-end bidirectional energy storage inverters, alternating-current deployment switches, a master control system, a data acquisition device, and a diesel generator. According to the signal of the data acquisition device, the master control system can be used to control a switch K1 to be switched on, lead-acid storage battery packs and lithium battery packs are connected to a transformer through the bidirectional energy storage inverters and the double-end bidirectional energy storage inverters respectively, and finally the lead-acid storage battery packs and the lithium battery packs are used to perform inverter power generation and transmit the generated power to a power grid, the power on the power grid can also be used to charge the lead-acid storage battery packs and the lithium battery pack reversely, and the diesel generator can also be used to charge the lithium battery packs and the lead-acid storage battery packs or perform power supply on the power grid. The photovoltaic power generation energy storage module hybrid deployment system of the utility model has advantages of reasonable structure, convenient maintenance and high cost performance, and the comprehensive cost of the system is reduced compared with a system in which a single battery is used.
Description
Technical field
The utility model relates to a kind of energy-storage module mixing preparation system and control method thereof of photovoltaic generation.
Background technology
Energy-storage system is an important composition part in photovoltaic off-grid electricity generation system, mainly bears the storage of electric energy, ensures the electric power supply of evening and rainy weather, is also a maximum part of photovoltaic off-grid power station investment.Existing energy-storage system generally adopts lead acid accumulator as main memory device, the proportional quantity of storage battery, and it is general that by carrying out proportioning with 1:8 or the 1:10 of photovoltaic scale, this just need to configure a large amount of storage batterys, and cost of investment is huge.Particularly larger pure from net project of some loads, in the time that the energy output of photovoltaic cannot meet loading demand, be stablizing of proof load, energy storage battery will discharge electric energy for load, and the process of this release is just equivalent to the process that once recycles of storage battery.Or sunlight blocked by cloud, in the time that photovoltaic power generation quantity can not meet the use of load, energy storage battery can discharge again electric weight for load, and this is again the process once recycling.And the service life cycle of lead acid accumulator is 600 left and right, so as adopt existing energy storage technology, this heavy load, pure off-grid project, energy-storage system is less than scrapping half a year, lead acid accumulator is changed again again.
Utility model content
In order to solve prior art in the pure defect in net project of heavy load, the utility model adopts lithium battery, lead acid accumulator hybrid power supply, and a kind of energy-storage module mixing preparation system of photovoltaic generation is provided.
The technical solution of the utility model is:
An energy-storage module mixing preparation system for photovoltaic generation, comprising:
Multiple battery pack, these battery pack comprise lead-acid batteries and lithium battery group;
Bidirectional energy-storage inverter, its DC terminal connects lead-acid batteries;
Both-end bidirectional energy-storage inverter, its DC terminal connects lithium battery group;
Exchange allotment switch, an end points K11 of its K switch 1 is connected to the interchange end B of bidirectional energy-storage inverter, an end points K21 of K switch 2 is connected to second of both-end bidirectional energy-storage inverter and exchanges end A2, after another end points K12 of K switch 1 is connected with another end points K22 of K switch 2, arrives electrical network through transformer;
Master control system, for controlling the operating state that exchanges allotment switch, meanwhile, master control system is connected with the data port of bidirectional energy-storage inverter and both-end bidirectional energy-storage inverter by data wire;
Data acquisition unit, the input of this data acquisition unit connects respectively network load monitor and photovoltaic power generation equipment monitor, and the output of this data acquisition unit is connected to master control system;
Network load monitor for detection of the various electrical quantitys of network load as electric current, voltage and power etc., photovoltaic power generation equipment monitor for the various electrical quantitys of monitoring photovoltaic power generation equipment as output current, voltage and power etc.;
Diesel engine generator, is connected with the public point of K2 in interchange allotment switch;
According to the signal of data acquisition unit, master control system energy control switch K1 conducting, lead-acid batteries through bidirectional energy-storage inverter and lithium battery group respectively through both-end bidirectional energy-storage inverter to transformer, the final inversion electrical network that generates electricity, also the electricity on electrical network oppositely can be charged to lead-acid batteries and lithium battery group, in the time that the public point of K2 is connected to the end points K21 of K switch 2, diesel generation function exchanges end A2 through second of both-end bidirectional energy-storage inverter lithium battery group is charged, simultaneously also can be by the second interchange end A2 through the first interchange end A1, the interchange end B of bidirectional energy-storage inverter charges to lead-acid batteries.
As preferably, the impulse electricity number of times of described lead-acid batteries is less than described lithium battery group impulse electricity number of times.
The invention also discloses a kind of control method of energy-storage module mixing preparation system of photovoltaic generation, control as follows.
A, according to the size of mains supply amount, divide stable power-supplying period, fluctuation power supply period;
B, stable power-supplying period are main power supply by lead-acid batteries, lithium battery group supplementary power;
The fluctuation power supply period is main power supply by lithium battery group, and insufficient section is by lead-acid batteries supplementary power;
As preferably, the electric discharge of described lead-acid batteries can intermittent discharge, and the electricity time of rushing of this lead-acid batteries presets.Conventionally, lead-acid batteries as required can multiple discharge, but only rushes once electricity every day; Can also be, lead-acid batteries can intermittently be rushed electricity as required, but continuous discharge every day once.
It should be noted that, the utility model is matching used with photovoltaic, stable power-supplying period, fluctuation power supply period are relative, this can be with reference to historical data as basic foundation, variation in conjunction with weather, period is divided, for example night, power supply can be divided into the stable power-supplying period, and the time on daytime can be divided into the fluctuation power supply period.
This cover system is given full play to the advantages characteristic of various batteries, utilize the discharging and recharging often of lithium battery, the characteristic such as electric current fast charging and discharging greatly, using lithium battery as electrokinetic cell, mainly solve photovoltaic generation and affected by Changes in weather, life problems when prolongation battery constantly discharges and recharges.And lead-acid battery is as main power supply storage battery, neither all discharge and recharge by all lead-acid batteries, but according to the situation of load, packet classification regulation and control, load needs great electric weight, just allow the lead-acid battery work of much electric weight, other lead-acid batteries, in resting state, have so just greatly reduced the cycle-index of lead-acid battery, have extended the useful life of lead-acid battery, thereby the renewal cost that has reduced lead-acid battery, has improved economic benefit.
The utlity model has beneficial effect rational in infrastructure, that the single battery of integrated cost ratio use reduces, easy to maintenance, the ratio of performance to price is high.
Brief description of the drawings
Fig. 1 is overall structure schematic diagram of the present utility model.
Embodiment
Now by reference to the accompanying drawings the utility model is further described:
As shown in the figure, a kind of energy-storage module mixing preparation system of photovoltaic generation, comprising:
Multiple battery pack, these battery pack comprise lead-acid batteries and lithium battery group;
Bidirectional energy-storage inverter, its DC terminal connects lead-acid batteries;
Both-end bidirectional energy-storage inverter, its DC terminal connects lithium battery group;
Exchange allotment switch, an end points K11 of its K switch 1 is connected to the interchange end B of bidirectional energy-storage inverter, an end points K21 of K switch 2 is connected to second of both-end bidirectional energy-storage inverter and exchanges end A2, after another end points K12 of K switch 1 is connected with another end points K22 of K switch 2, arrives electrical network through transformer;
Master control system, for controlling the operating state that exchanges allotment switch, meanwhile, master control system is connected with the data port of bidirectional energy-storage inverter and both-end bidirectional energy-storage inverter by data wire;
Data acquisition unit, the input of this data acquisition unit connects respectively network load monitor and photovoltaic power generation equipment monitor, and the output of this data acquisition unit is connected to master control system;
Network load monitor for detection of the various electrical quantitys of network load as electric current, voltage and power etc., photovoltaic power generation equipment monitor for the various electrical quantitys of monitoring photovoltaic power generation equipment as output current, voltage and power etc.
Diesel engine generator, is connected with the public point of K2 in interchange allotment switch;
According to the signal of data acquisition unit, master control system energy control switch K1 conducting, lead-acid batteries through bidirectional energy-storage inverter and lithium battery group respectively through both-end bidirectional energy-storage inverter to transformer, the final inversion electrical network that generates electricity, also the electricity on electrical network oppositely can be charged to lead-acid batteries and lithium battery group, in the time that the public point of K2 is connected to the end points K21 of K switch 2, diesel generation function exchanges end A2 through second of both-end bidirectional energy-storage inverter lithium battery group is charged, simultaneously also can be by the second interchange end A2 through the first interchange end A1, the interchange end B of bidirectional energy-storage inverter charges to lead-acid batteries, diesel engine generator can also be directly connected to electrical network and power to the load.
The impulse electricity number of times of lead-acid batteries is less than described lithium battery group impulse electricity number of times.
Further introduce specific embodiment below in conjunction with accompanying drawing:
Period by day, when photovoltaic generation can not meet load, preferential lithium battery group generating, then regulate by lead-acid batteries.Such as photovoltaic power generation quantity is 150kwh, and load use amount is 200kwh, and unnecessary 50kwh electric weight is just regulated by lithium battery group and lead-acid batteries.According to above-mentioned situation, as long as suitably open corresponding battery pack, how many electric weight are opened corresponding battery pack number as required, and lithium battery is preferential.As photovoltaic generation has the electric energy of surplus, first give lead acid battery charge, then lithium battery group is charged.
Period at night, because photovoltaic is not generated electricity, main power supply unit completes power supply by 4 lead-acid batteries, and all the other 2 lithium battery battery groups therefrom regulate, and makes for electric equilibrium.Lead-acid batteries for power supply is also not necessarily all opened, but determines corresponding unlatching group number according to load use amount.Selectively open, for example, first start the batteries of not opening daytime, the not enough principle increasing again.
If daytime, battery pack was not full of, do not supply the load in evening.At this moment system will be switched to mainly and be powered by diesel engine unit, also gives each batteries charging simultaneously.
Each battery pack can be intersected to stagger the time and discharged and recharged, as long as rationally regulate and distribute discharging and recharging of each battery pack, just can make the number of times that discharges and recharges of each lead-acid batteries maintain once a day, thereby greatly extend the life-span of the use of lead-acid batteries.
4 lead-acid batteries also can be selected 2 common lead-acid batteries, select tubular colloidal battery pack for another 2, common lead-acid batteries is the most cheap battery pack, lead-acid batteries also can be intersected to stagger the time with tubular colloidal battery pack and discharged and recharged, further performance and price optimization, the impulse electricity number of times of common lead-acid batteries is less than the impulse electricity number of times of tubular colloidal battery pack, and the impulse electricity number of times of tubular colloidal battery pack is less than described lithium battery group impulse electricity number of times.
Claims (2)
1. an energy-storage module mixing preparation system for photovoltaic generation, is characterized in that, comprising:
Multiple battery pack, these battery pack comprise lead-acid batteries and lithium battery group;
Bidirectional energy-storage inverter, its DC terminal connects lead-acid batteries;
Both-end bidirectional energy-storage inverter, its DC terminal connects lithium battery group;
Exchange allotment switch, an end points K11 of its K switch 1 is connected to the interchange end B of bidirectional energy-storage inverter, an end points K21 of K switch 2 is connected to second of both-end bidirectional energy-storage inverter and exchanges end A2, after another end points K12 of K switch 1 is connected with another end points K22 of K switch 2, arrives electrical network through transformer;
Master control system, for controlling the on off state that exchanges allotment switch, meanwhile, master control system is connected with the data port of bidirectional energy-storage inverter and both-end bidirectional energy-storage inverter by data wire;
Data acquisition unit, the input of this data acquisition unit connects respectively network load monitor and photovoltaic power generation equipment monitor, and the output of this data acquisition unit is connected to master control system;
Diesel engine generator, is connected with the public point of K2 in interchange allotment switch;
According to the signal of data acquisition unit, master control system energy control switch K1 conducting, lead-acid batteries through bidirectional energy-storage inverter and lithium battery group respectively through both-end bidirectional energy-storage inverter to transformer, the final inversion electrical network that generates electricity, also the electricity on electrical network oppositely can be charged to lead-acid batteries and lithium battery group, in the time that the public point of K2 is connected to the end points K21 of K switch 2, diesel generation function exchanges end A2 through second of both-end bidirectional energy-storage inverter lithium battery group is charged, simultaneously also can be through the first interchange end A1, the interchange end B of bidirectional energy-storage inverter charges to lead-acid batteries.
2. the energy-storage module mixing preparation system of a kind of photovoltaic generation as claimed in claim 1, is characterized in that, the impulse electricity number of times of described lead-acid batteries is less than described lithium battery group impulse electricity number of times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420182259.8U CN203788037U (en) | 2014-04-15 | 2014-04-15 | Photovoltaic power generation energy storage module hybrid deployment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420182259.8U CN203788037U (en) | 2014-04-15 | 2014-04-15 | Photovoltaic power generation energy storage module hybrid deployment system |
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| Publication Number | Publication Date |
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| CN203788037U true CN203788037U (en) | 2014-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420182259.8U Withdrawn - After Issue CN203788037U (en) | 2014-04-15 | 2014-04-15 | Photovoltaic power generation energy storage module hybrid deployment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956821A (en) * | 2014-04-15 | 2014-07-30 | 浙江朗呈新能源有限公司 | Mixed distribution system and control method for energy storage modules for photovoltaic power generation |
| CN106487029A (en) * | 2015-08-26 | 2017-03-08 | Aes有限公司 | Battery storage Method and System |
-
2014
- 2014-04-15 CN CN201420182259.8U patent/CN203788037U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956821A (en) * | 2014-04-15 | 2014-07-30 | 浙江朗呈新能源有限公司 | Mixed distribution system and control method for energy storage modules for photovoltaic power generation |
| CN106487029A (en) * | 2015-08-26 | 2017-03-08 | Aes有限公司 | Battery storage Method and System |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140820 Effective date of abandoning: 20160406 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |