CN103956821B - The energy-storage module mixing preparation system of photovoltaic generation and control method thereof - Google Patents
The energy-storage module mixing preparation system of photovoltaic generation and control method thereof Download PDFInfo
- Publication number
- CN103956821B CN103956821B CN201410151740.5A CN201410151740A CN103956821B CN 103956821 B CN103956821 B CN 103956821B CN 201410151740 A CN201410151740 A CN 201410151740A CN 103956821 B CN103956821 B CN 103956821B
- Authority
- CN
- China
- Prior art keywords
- energy
- lead
- acid batteries
- lithium battery
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of energy-storage module mixing preparation system and control method thereof of photovoltaic generation, system comprises: multiple battery pack; Bidirectional energy-storage inverter; Both-end bidirectional energy-storage inverter; Exchange allotment switch; Master control system; Data acquisition unit; Diesel engine generator; 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, final inversion generates electricity electrical network, also the electricity on electrical network oppositely can be charged to lead-acid batteries and lithium battery group, diesel engine generator can also charge or upper mains supply to lithium battery group and lead-acid batteries.The present invention has rational in infrastructure, integrated cost battery reduce, easy to maintenance, the ratio of performance to price high beneficial effect more single than use.
Description
Technical field
The present invention 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, and mainly bear the storage of electric energy, ensureing the electric power supply of evening and rainy weather, is also that a maximum part is invested in photovoltaic off-grid power station.Existing energy-storage system generally adopts lead acid accumulator as main memory device, the proportional quantity of storage battery, generally carries out proportioning by 1:8 or 1:10 with photovoltaic scale, and this just needs to configure a large amount of storage batterys, and cost of investment is huge.Particularly larger pure from net project of some loads, when 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, what be just equivalent to storage battery once recycles process.Or sunlight is blocked by cloud, when photovoltaic power generation quantity can not meet the use of load, energy storage battery can discharge again electricity for load, and this is again the process once recycled.And the service life cycle of lead acid accumulator is at about 600 times, so as adopted existing energy storage technology, this heavy load, pure off-grid project, energy-storage system must be scrapped less than half a year, and lead acid accumulator is changed again again.
Summary of the invention
Pure from the defect in net project in heavy load in order to solve prior art, the present invention adopts lithium battery, lead acid accumulator hybrid power supply, provides a kind of energy-storage module mixing preparation system of photovoltaic generation.
Technical scheme of the present invention 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 be connected to second of both-end bidirectional energy-storage inverter exchange end A2, another end points K12 of K switch 1 be connected with another end points K22 of K switch 2 after through transformer to electrical network;
Master control system, for controlling the operating state exchanging allotment switch, meanwhile, master control system is connected by the data port of data wire with bidirectional energy-storage inverter and both-end bidirectional energy-storage inverter;
Data acquisition unit, the input of this data acquisition unit connects network load monitor and photovoltaic power generation equipment monitor respectively, and the output of this data acquisition unit is connected to master control system;
Network load monitor is used for the various electrical quantitys of detection of grid load as electric current, voltage and power etc., and photovoltaic power generation equipment monitor is for monitoring the various electrical quantitys of photovoltaic power generation equipment as output current, voltage and power etc.;
Diesel engine generator, the public point allocating K2 in switch with interchange is connected;
According to the signal of data acquisition unit, master control system energy control switch K1 conducting, lead-acid batteries is connected to transformer through bidirectional energy-storage inverter, lithium battery group is connected to transformer through both-end bidirectional energy-storage inverter, final inversion generates electricity electrical network, also the electricity on electrical network oppositely can be charged to lead-acid batteries and lithium battery group, when 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 and charges to lithium battery group, also can exchange end A2 by second simultaneously and exchange end A1 through first, the interchange end B of bidirectional energy-storage inverter charges to lead-acid batteries.
As preferably, the discharge and recharge number of times of described lead-acid batteries is less than described lithium battery group discharge and recharge 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, size according to 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 charging interval of this lead-acid batteries presets.Usually, lead-acid batteries as required can multiple discharge, but only rushes once electricity every day; Can also be that lead-acid batteries as required can intermittent charge, but continuous discharge every day once.
It should be noted that, the present invention is matching used with photovoltaic, stable power-supplying period, fluctuation power supply period are relative, this can with reference to the data of history as basic foundation, change in conjunction with weather, period divides, power such as night and can be divided into the stable power-supplying period, daylight hours can be divided into the fluctuation power supply period.
This cover system gives full play to the advantages characteristic of various battery, utilize the discharge and recharge of lithium battery often, can the characteristic such as big current fast charging and discharging, using lithium battery as electrokinetic cell, mainly solving photovoltaic generation affects by Changes in weather, and prolongation battery constantly carries out life problems during discharge and recharge.And lead-acid battery is as main power supply storage battery, lead-acid battery that neither be all carries out discharge and recharge, but according to the situation of load, packet classification regulates and controls, and load needs great electricity, just allow the lead-acid battery work of much electricity, other lead-acid batteries are then in resting state, so just greatly reduce the cycle-index of lead-acid battery, extend the useful life of lead-acid battery, thus reduce the renewal cost of lead-acid battery, improve economic benefit.
The present invention has rational in infrastructure, integrated cost battery reduce, easy to maintenance, the ratio of performance to price high beneficial effect more single than use.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Embodiment
Now the present invention is further illustrated by reference to the accompanying drawings:
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 be connected to second of both-end bidirectional energy-storage inverter exchange end A2, another end points K12 of K switch 1 be connected with another end points K22 of K switch 2 after through transformer to electrical network;
Master control system, for controlling the operating state exchanging allotment switch, meanwhile, master control system is connected by the data port of data wire with bidirectional energy-storage inverter and both-end bidirectional energy-storage inverter;
Data acquisition unit, the input of this data acquisition unit connects network load monitor and photovoltaic power generation equipment monitor respectively, and the output of this data acquisition unit is connected to master control system;
Network load monitor is used for the various electrical quantitys of detection of grid load as electric current, voltage and power etc., and photovoltaic power generation equipment monitor is for monitoring the various electrical quantitys of photovoltaic power generation equipment as output current, voltage and power etc.
Diesel engine generator, the public point allocating K2 in switch with interchange is connected;
According to the signal of data acquisition unit, master control system energy control switch K1 conducting, lead-acid batteries is connected to transformer through bidirectional energy-storage inverter, lithium battery group is connected to transformer through both-end bidirectional energy-storage inverter, final inversion generates electricity electrical network, also the electricity on electrical network oppositely can be charged to lead-acid batteries and lithium battery group, when 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 and charges to lithium battery group, also can exchange end A2 by second simultaneously and exchange end A1 through first, 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 discharge and recharge number of times of lead-acid batteries is less than described lithium battery group discharge and recharge number of times.
Specific embodiment is introduced further below in conjunction with accompanying drawing:
Period by day, when photovoltaic generation can not meet load, preferential lithium battery group generating, then regulated by lead-acid batteries.Such as photovoltaic power generation quantity is 150kwh, and load use amount is 200kwh, and unnecessary 50kwh electricity is just regulated by lithium battery group and lead-acid batteries.As long as accordingly suitably open corresponding battery pack, how many electricity open 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 does not generate electricity, main power supply unit completes power supply by 4 lead-acid batteries, and all the other 2 lithium 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, such as, first start the batteries of not opening daytime, the not enough principle increased again.
If daytime, battery pack was not full of, do not supply the load in evening.At this moment system will be switched to and power primarily of diesel engine unit, also gives each batteries charging simultaneously.
Each battery pack can intersect discharge and recharge of staggering the time, as long as reasonable adjusting distributes the discharge and recharge of each battery pack, the discharge and recharge number of times of each lead-acid batteries just can be made to maintain once a day, thus substantially prolongs the life-span of the use of lead-acid batteries.
4 lead-acid batteries also can select 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 and tubular colloidal battery pack also can intersect discharge and recharge of staggering the time, further performance and price optimization, the discharge and recharge number of times of common lead-acid batteries is less than the discharge and recharge number of times of tubular colloidal battery pack, and the discharge and recharge number of times of tubular colloidal battery pack is less than described lithium battery group discharge and recharge number of times.
Claims (5)
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 be connected to second of both-end bidirectional energy-storage inverter exchange end A2, another end points K12 of K switch 1 be connected with another end points K22 of K switch 2 after through transformer to electrical network;
Master control system, for controlling the on off state exchanging allotment switch, meanwhile, master control system is connected by the data port of data wire with bidirectional energy-storage inverter and both-end bidirectional energy-storage inverter;
Data acquisition unit, the input of this data acquisition unit connects network load monitor and photovoltaic power generation equipment monitor respectively, and the output of this data acquisition unit is connected to master control system;
Diesel engine generator, the public point allocating K2 in switch with interchange is connected;
According to the signal of data acquisition unit, master control system energy control switch K1 conducting, lead-acid batteries is connected to transformer through bidirectional energy-storage inverter, lithium battery group is connected to transformer through both-end bidirectional energy-storage inverter, final inversion generates electricity electrical network, also the electricity on electrical network oppositely can be charged to lead-acid batteries and lithium battery group, when 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 and charges to lithium battery group, also can exchange end A1 through first simultaneously, 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 discharge and recharge number of times of described lead-acid batteries is less than described lithium battery group discharge and recharge number of times.
3. a control method for the energy-storage module mixing preparation system of photovoltaic generation, comprises the energy-storage module mixing preparation system of a kind of photovoltaic generation as claimed in claim 1 or 2, it is characterized in that, control as follows:
A, size according to 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.
4. the control method of the energy-storage module mixing preparation system of a kind of photovoltaic generation as claimed in claim 3, is characterized in that, the electric discharge of described lead-acid batteries can intermittent discharge, and the charging interval of this lead-acid batteries presets.
5. the control method of the energy-storage module mixing preparation system of a kind of photovoltaic generation as claimed in claim 4, it is characterized in that, the charging times of described lead-acid batteries once a day.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410151740.5A CN103956821B (en) | 2014-04-15 | 2014-04-15 | The energy-storage module mixing preparation system of photovoltaic generation and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410151740.5A CN103956821B (en) | 2014-04-15 | 2014-04-15 | The energy-storage module mixing preparation system of photovoltaic generation and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103956821A CN103956821A (en) | 2014-07-30 |
| CN103956821B true CN103956821B (en) | 2016-04-06 |
Family
ID=51334067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410151740.5A Active CN103956821B (en) | 2014-04-15 | 2014-04-15 | The energy-storage module mixing preparation system of photovoltaic generation and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103956821B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015149206A1 (en) * | 2014-03-31 | 2015-10-08 | 刘骏涛 | Hand-cranked charger |
| CN110112762A (en) * | 2019-06-10 | 2019-08-09 | 华润智慧能源有限公司 | A kind of energy-storage system |
| CN111049180A (en) * | 2019-12-17 | 2020-04-21 | 国电南京自动化股份有限公司 | Island microgrid voltage frequency control method and system based on hybrid energy storage |
| CN111313397B (en) * | 2020-03-24 | 2022-03-22 | 北京双登慧峰聚能科技有限公司 | Energy control system and control method for communication base station hybrid power supply system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044989B (en) * | 2009-10-14 | 2013-03-20 | 华为技术有限公司 | Hybrid energy power supply system and method based on solar system |
| CN101969281B (en) * | 2010-10-14 | 2013-03-13 | 北京四方继保自动化股份有限公司 | Coordination control and optimization method for battery energy accumulation and photovoltaic power generation based on co-direct current bus |
| CN101976986A (en) * | 2010-11-22 | 2011-02-16 | 沈阳工业大学 | Independent power supply system based on multi-energy hybrid power generation |
| CN202737555U (en) * | 2012-07-27 | 2013-02-13 | 无锡富洪科技有限公司 | Composite energy apparatus for ship and ship equipped with same |
| CN102882221B (en) * | 2012-09-27 | 2014-12-31 | 广东易事特电源股份有限公司 | Supercapacitor and storage battery mixed energy-storing energy management circuit in photovoltaic grid-connected power generation |
| CN103595138B (en) * | 2013-11-21 | 2016-06-29 | 国网上海市电力公司 | A kind of smart micro-grid system |
| CN203788037U (en) * | 2014-04-15 | 2014-08-20 | 浙江朗呈新能源有限公司 | Photovoltaic power generation energy storage module hybrid deployment system |
-
2014
- 2014-04-15 CN CN201410151740.5A patent/CN103956821B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103956821A (en) | 2014-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103904735B (en) | A kind of energy storage subsystem for batch (-type) renewable energy system and control method thereof | |
| CN105186549A (en) | V2G system based on direct-current micro-grid | |
| CN202586481U (en) | Micro electrical network intelligent balanced charging and power supply system | |
| CN103117552A (en) | Hybrid energy storage system based on ordered energy control | |
| CN105186669A (en) | Distributed common direct current bus based wind energy and solar energy stored charging station system | |
| CN204681125U (en) | A kind of charging system for electric automobile based on solar energy | |
| CN205039612U (en) | Scene stores up charging station system based on public dc bus of distributing type | |
| CN204243873U (en) | The hybrid accumulator of a kind of ultracapacitor and storage battery | |
| CN105305495A (en) | Dispatching method for multi-energy complement micro-grid system | |
| CN105811458A (en) | Microgrid energy storage system and energy management method thereof | |
| CN103956821B (en) | The energy-storage module mixing preparation system of photovoltaic generation and control method thereof | |
| CN109103939A (en) | A kind of energy-storage system intelligent controlling device and method reducing photovoltaic plant loss | |
| CN209497314U (en) | A kind of micro-grid system coupled based on fuel cell test with charging pile | |
| CN104505926A (en) | Power battery pack charging system and method | |
| CN202888862U (en) | Energy storage inverter suitable for distributed new energy power | |
| CN204156804U (en) | A kind of novel household distributed solar energy electrification energy storage system | |
| CN102790410A (en) | Storage battery charging-discharging system and control method thereof for new energy power generating system | |
| CN103337868A (en) | Method and device for inhibiting photovoltaic generation output power fluctuation | |
| CN103165943B (en) | Storage battery formation method, circuit and device | |
| CN202888901U (en) | Equalization circuit for battery pack | |
| CN103956820B (en) | The multiple energy-storage module mixing preparation system of photovoltaic generation and control method thereof | |
| CN203788037U (en) | Photovoltaic power generation energy storage module hybrid deployment system | |
| CN104767248B (en) | Intelligent high efficiency of energy management system | |
| CN208046261U (en) | The energy-storage system of low capacity old and useless battery | |
| CN204516867U (en) | A kind of intelligent energy accumulation management system being applied to photovoltaic art |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |