CN104124702A - Lithium photovoltaic energy-storing grid-connected power supply system - Google Patents
Lithium photovoltaic energy-storing grid-connected power supply system Download PDFInfo
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- CN104124702A CN104124702A CN201410290950.2A CN201410290950A CN104124702A CN 104124702 A CN104124702 A CN 104124702A CN 201410290950 A CN201410290950 A CN 201410290950A CN 104124702 A CN104124702 A CN 104124702A
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The invention discloses a lithium photovoltaic energy-storing grid-connected power supply system. The lithium photovoltaic energy-storing grid-connected power supply system comprises a lithium battery pack and a photovoltaic array, wherein the lithium battery pack is charged through a DC/DC (Direct Current to Direct Current) converter and a bilateral AC/DC (Alternating Current to Direct Current) converter; the lithium battery pack can be discharged to a power grid through the bilateral AC/DC converter. An alternating current-direct current integral structure is adopted, photovoltaic energy storing and a grid connection technique are fully combined, and coordinated control is performed, thereby realizing intelligent control over the photovoltaic energy storing and the grid connection technique. The battery pack is charged to store energy at power consumption valleys or under the condition of sufficient illumination, and grid-connected power generation is performed at power consumption peaks or other power demand periods, thereby solving the problem of imbalance between the supply and demand of electric energy. As an effective supplement of the power grid, the power supply system plays a role in adjusting peaks and filling valleys for the power grid. The system is small in size, and has long service life, a photovoltaic energy-storing function, a maximum power tracking function and an all-weather working effect.
Description
Technical field
The invention belongs to field of photovoltaic power generation, be specifically related to the grid-connected electric power system of a kind of lithium electricity photovoltaic energy storage.
Background technology
Solar energy is one of a kind of putative novel energy that can be inexhaustible, but the grid-connected meeting of solar energy brings impact to the security performance of electrical network, must have advanced energy storage grid-connected system technology to support.Energy storage grid-connected system has solved randomness and the fluctuation problem of generation of electricity by new energy to a great extent, and the variation of line voltage, frequency and the phase place causing by adjusting generation of electricity by new energy, sends out solar energy and be incorporated to reliably conventional electrical network.Existing photovoltaic energy storage system, is generally to adopt lead acid accumulator as traditional energy storage device, and lead acid accumulator exists that energy storage efficiency is lower, storage power density is low, volume is large and the technological deficiency such as useful life is short.
In order to improve the receiving ability of electrical network to photovoltaic energy storage system, strengthen the compatibility of electrical network, reduce system bulk and improve energy storage density, the design of lithium electric light volt energy storage grid-connected system becomes inexorable trend.
At present, photovoltaic energy storage system is just carried out energy storage in illumination abundance, and can not realize energy storage in the low power consumption stage of civil power, cause in illumination not enough or continuous when overcast and rainy, cause energy-storage system can not obtain sufficient utilization, in needs electricity consumption or peak times of power consumption, energy-storage system cannot provide enough energy.
Summary of the invention
The object of this invention is to provide the grid-connected electric power system of a kind of lithium electricity photovoltaic energy storage, to solve the problem of existing electric power system electric energy unbalanced supply-demand.
In order to realize above object, the technical solution adopted in the present invention is: the grid-connected electric power system of a kind of lithium electricity photovoltaic energy storage, comprise lithium battery group and photovoltaic array, described lithium battery group, for being connected with civil power is two-way by two-way AC/DC converter, is also connected with photovoltaic array by DC/DC converter; Lithium battery group is connected with energy-storage battery management system, and photovoltaic array is connected with photovoltaic cell management system; Described energy-storage battery management system is connected with the communication of battery carrier monitoring unit, and two-way AC/DC converter connects with corresponding two-way AC/DC converter monitoring unit both-way communication, and DC/DC converter connects with corresponding DC/DC converter monitoring unit both-way communication.
Described battery carrier monitoring unit, two-way AC/DC converter monitoring unit, DC/DC converter monitoring unit are all connected with background monitoring unit.
Described battery carrier monitoring unit, two-way AC/DC converter monitoring unit, DC/DC converter monitoring unit are all connected with background monitoring unit by the network switch.
This electric power system also comprises the environment detector being connected with the communication of photovoltaic cell management system.
Described environment detector is connected with background monitoring unit communications by the network switch.
The both-way communication mode of described two-way AC/DC converter and two-way AC/DC converter monitoring unit and DC/DC converter and DC/DC converter monitoring unit is CAN communication.
Described two-way AC/DC converter, DC/DC converter are also connected with battery management system or the communication of battery carrier monitoring unit.
The grid-connected electric power system of lithium electricity photovoltaic energy storage of the present invention can be charged to lithium battery group by DC/DC converter and two-way AC/DC converter, lithium battery group also can be discharged to electrical network by two-way AC/DC converter, adopt AC/DC integrated structure, by photovoltaic energy storage and the abundant combination of interconnection technology, coordinate to control, realize the Based Intelligent Control of photovoltaic energy storage and interconnection technology, when low power consumption period or illumination abundance, battery pack is carried out to charging energy-storing, in peak of power consumption period or other, need electricity consumption to generate electricity by way of merging two or more grid systems period, solved the problem of electric energy unbalanced supply-demand, as effectively supplementing of electrical network, electrical network is played to peak-clipping and valley-filling effect, system bulk is little, long service life, there is photovoltaic energy storage and there is maximal power tracing function and all weather operations effect.
Accompanying drawing explanation
Fig. 1 is lithium electric light volt energy storage grid-connected system embodiment theory diagram of the present invention;
Fig. 2 is the schematic diagram of pattern 1 work of system of the present invention;
Fig. 3 is the schematic diagram of pattern 2 work of system of the present invention;
Fig. 4 is the schematic diagram of the mode 3 work of system of the present invention;
Fig. 5 is the schematic diagram of pattern 4 work of system of the present invention;
Fig. 6 is the schematic diagram of pattern 5 work of system of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described further.
Be illustrated in figure 1 the schematic diagram of the grid-connected electric power system embodiment of lithium electricity photovoltaic energy storage of the present invention, as seen from the figure, this electric power system comprises lithium battery group and photovoltaic array, and lithium battery group, for being connected with electrical network is two-way by two-way AC/DC converter, is also connected with photovoltaic array by DC/DC converter; Lithium battery group is connected with energy-storage battery management system, and photovoltaic array is connected with photovoltaic cell management system; Energy-storage battery management system is connected with the communication of battery carrier monitoring unit, two-way AC/DC converter connects with corresponding two-way AC/DC converter monitoring unit both-way communication, DC/DC converter connects with corresponding DC/DC converter monitoring unit both-way communication, carries out communication, control and Presentation Function.
Battery carrier monitoring unit, two-way AC/DC converter monitoring unit, DC/DC converter monitoring unit are all connected with background monitoring unit by the network switch, carry out ethernet communication, operating state and the ambient conditions of background monitoring unit real-time display system.
This electric power system also comprises the environment detector being connected with the communication of photovoltaic cell management system, and this environment detector detects the residing environmental information of photovoltaic array, and is connected with background monitoring unit communications by the network switch, by information reporting background monitoring unit.
The lithium battery group of the present embodiment consists of a plurality of cell connection in series-parallel, energy-storage battery management system Real-Time Monitoring cell information, and on send battery carrier monitoring unit; Photovoltaic cell management system realizes the maximum power control of photovoltaic array.
In addition, two-way AC/DC converter, DC/DC converter are also connected with battery management system (as shown in Figure 1) or the communication of battery carrier monitoring unit, for gathering the battery information of battery pack, control parameter when battery pack is charged according to the relevant data adjustment such as SOC, such as charging current, charging interval etc.
The control strategy of the grid-connected electric power system of lithium of the present invention electricity photovoltaic energy storage is: when the low power consumption phase or there is period of illumination, two-way AC/DC converter or DC/DC converter are to batteries charging; When peak times of power consumption and while having illumination, photovoltaic array is by DC/DC converter to batteries charging, and lithium battery group is connected to the grid through two-way AC/DC converter electric discharge; When peak times of power consumption and unglazed photograph, photovoltaic array and DC/DC converter quit work, and lithium battery group is connected to the grid through two-way AC/DC converter electric discharge, and this strategy comprises multiple-working mode, and the concrete course of work and principle are as follows:
Pattern 1: only photovoltaic carries out energy storage to lithium battery group: when illumination abundance and power load do not need energy-storage battery system power supply, photovoltaic array carries out charging energy-storing by DC/DC converter to lithium battery group, and the maximal power tracing of realizing photovoltaic array is controlled, and energy flow is as shown in Fig. 2 solid line.
Pattern 2: only civil power is to battery energy storage: when night or continuously overcast and rainy etc. without light conditions under, and electricity consumption is in low ebb during period, civil power carries out charging energy-storing by AC/DC converter to lithium battery group, energy flow is as shown in Fig. 3 solid line.
Mode 3: photovoltaic and civil power are simultaneously to photovoltaic energy storage: when illumination abundance and electricity consumption are in low ebb during period, photovoltaic array carries out charging energy-storing by DC/DC converter to lithium battery group, and realizes the maximal power tracing of photovoltaic array; Civil power carries out charging energy-storing by AC/DC converter to lithium battery group, and energy flow is as shown in Fig. 4 solid line.
Pattern 4: lithium battery group is only in being incorporated into the power networks: when night or continuously overcast and rainy wait without light conditions under, and in peak of power consumption, it is grid-connected that lithium battery group realizes by AC/DC converter, reaches the effect of supplementary electrical network, energy flow is as shown in Fig. 5 solid line.
Pattern 5: photovoltaic is incorporated into the power networks to lithium battery group energy storage while lithium battery group: during when illumination abundance and in peak times of power consumption, photovoltaic array carries out charging energy-storing by DC/DC converter to lithium battery group, and realizes the maximal power tracing of photovoltaic array; Lithium battery group realizes grid-connected by AC/DC converter, reach the effect that supplements electrical network, and energy flow is as shown in Fig. 6 solid line.
Above embodiment is only for helping to understand core concept of the present invention; can not limit the present invention with this; for those skilled in the art; every foundation thought of the present invention; the present invention is modified or is equal to replacement; any change of doing in specific embodiments and applications, within all should being included in protection scope of the present invention.
Claims (7)
1. the grid-connected electric power system of lithium electricity photovoltaic energy storage, is characterized in that: comprise lithium battery group and photovoltaic array, described lithium battery group, for being connected with civil power is two-way by two-way AC/DC converter, is also connected with photovoltaic array by DC/DC converter; Lithium battery group is connected with energy-storage battery management system, and photovoltaic array is connected with photovoltaic cell management system; Described energy-storage battery management system is connected with the communication of battery carrier monitoring unit, and two-way AC/DC converter connects with corresponding two-way AC/DC converter monitoring unit both-way communication, and DC/DC converter connects with corresponding DC/DC converter monitoring unit both-way communication.
2. the grid-connected electric power system of lithium electricity photovoltaic energy storage according to claim 1, is characterized in that: described battery carrier monitoring unit, two-way AC/DC converter monitoring unit, DC/DC converter monitoring unit are all connected with background monitoring unit.
3. the grid-connected electric power system of lithium electricity photovoltaic energy storage according to claim 2, is characterized in that: described battery carrier monitoring unit, two-way AC/DC converter monitoring unit, DC/DC converter monitoring unit are all connected with background monitoring unit by the network switch.
4. the grid-connected electric power system of lithium electricity photovoltaic energy storage according to claim 3, is characterized in that: this electric power system also comprises the environment detector being connected with the communication of photovoltaic cell management system.
5. the grid-connected electric power system of lithium electricity photovoltaic energy storage according to claim 4, is characterized in that: described environment detector is connected with background monitoring unit communications by the network switch.
6. the grid-connected electric power system of lithium electricity photovoltaic energy storage according to claim 1, is characterized in that: the both-way communication mode of described two-way AC/DC converter and two-way AC/DC converter monitoring unit and DC/DC converter and DC/DC converter monitoring unit is CAN communication.
7. the grid-connected electric power system of lithium electricity photovoltaic energy storage according to claim 1, is characterized in that: described two-way AC/DC converter, DC/DC converter are also connected with battery management system or the communication of battery carrier monitoring unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410290950.2A CN104124702A (en) | 2014-06-25 | 2014-06-25 | Lithium photovoltaic energy-storing grid-connected power supply system |
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| CN201410290950.2A CN104124702A (en) | 2014-06-25 | 2014-06-25 | Lithium photovoltaic energy-storing grid-connected power supply system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162175A (en) * | 2015-10-12 | 2015-12-16 | 国网浙江杭州市富阳区供电公司 | Power control method and system of distributed power generation grid connection points |
| CN105552963A (en) * | 2016-02-04 | 2016-05-04 | 苏州高创特新能源发展股份有限公司 | Photovoltaic power generation grid-connected system based on lithium ion battery energy storage |
| CN107658893A (en) * | 2017-10-27 | 2018-02-02 | 湖州师范学院 | A kind of lifting unit energy recovery utilizing system and control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010053872A1 (en) * | 2008-11-05 | 2010-05-14 | Greensmith Energy Management Systems, Llc | Distributed energy storage system, and applications thereof |
| CN102904278A (en) * | 2012-09-20 | 2013-01-30 | 江苏万丰光伏有限公司 | Distribution type grid connection photovoltaic system power supply |
| CN103199564A (en) * | 2013-04-18 | 2013-07-10 | 山东圣阳电源股份有限公司 | Intelligent power grid distributed self-supporting photovoltaic power supply system |
| CN103337886A (en) * | 2013-06-21 | 2013-10-02 | 国家电网公司 | Wind and light storage micro-grid system for industrial park |
| CN103532214A (en) * | 2013-09-17 | 2014-01-22 | 南京航空航天大学 | Photovoltaic power generation system structure integrating energy storage and grid-connected and off-grid power supply functions and control method |
| CN203984006U (en) * | 2014-06-25 | 2014-12-03 | 许继电气股份有限公司 | The grid-connected electric power system of lithium electricity photovoltaic energy storage |
-
2014
- 2014-06-25 CN CN201410290950.2A patent/CN104124702A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010053872A1 (en) * | 2008-11-05 | 2010-05-14 | Greensmith Energy Management Systems, Llc | Distributed energy storage system, and applications thereof |
| CN102904278A (en) * | 2012-09-20 | 2013-01-30 | 江苏万丰光伏有限公司 | Distribution type grid connection photovoltaic system power supply |
| CN103199564A (en) * | 2013-04-18 | 2013-07-10 | 山东圣阳电源股份有限公司 | Intelligent power grid distributed self-supporting photovoltaic power supply system |
| CN103337886A (en) * | 2013-06-21 | 2013-10-02 | 国家电网公司 | Wind and light storage micro-grid system for industrial park |
| CN103532214A (en) * | 2013-09-17 | 2014-01-22 | 南京航空航天大学 | Photovoltaic power generation system structure integrating energy storage and grid-connected and off-grid power supply functions and control method |
| CN203984006U (en) * | 2014-06-25 | 2014-12-03 | 许继电气股份有限公司 | The grid-connected electric power system of lithium electricity photovoltaic energy storage |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162175A (en) * | 2015-10-12 | 2015-12-16 | 国网浙江杭州市富阳区供电公司 | Power control method and system of distributed power generation grid connection points |
| CN105552963A (en) * | 2016-02-04 | 2016-05-04 | 苏州高创特新能源发展股份有限公司 | Photovoltaic power generation grid-connected system based on lithium ion battery energy storage |
| CN107658893A (en) * | 2017-10-27 | 2018-02-02 | 湖州师范学院 | A kind of lifting unit energy recovery utilizing system and control method |
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