CN104283228A - Grid-connection energy storage system - Google Patents
Grid-connection energy storage system Download PDFInfo
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- CN104283228A CN104283228A CN201410527410.1A CN201410527410A CN104283228A CN 104283228 A CN104283228 A CN 104283228A CN 201410527410 A CN201410527410 A CN 201410527410A CN 104283228 A CN104283228 A CN 104283228A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 74
- 230000008859 change Effects 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 14
- 229910052744 lithium Inorganic materials 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 239000005955 Ferric phosphate Substances 0.000 claims description 10
- 229940032958 ferric phosphate Drugs 0.000 claims description 10
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical group [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 claims description 10
- 229910000399 iron(III) phosphate Inorganic materials 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 6
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 abstract 1
- 238000007726 management method Methods 0.000 description 24
- 238000010248 power generation Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 101100498759 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) DDI1 gene Proteins 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010348 incorporation Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000005622 photoelectricity Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 101150028119 SPD1 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
Classifications
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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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- H02J3/383—
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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
Abstract
The invention discloses a grid-connection energy storage system. The grid-connection energy storage system comprises a photovoltaic array, a grid-connection inversion module, an electric energy storage unit and an energy management and automatic monitor unit, wherein the electric energy storage unit is used for converting electric energy and controlling the flowing direction of currents, and the energy management and automatic monitor unit is used for carrying out automatic control, adjustment and dispatch on a power station and controlling the change of adjusting power of the electric energy storage unit. The photovoltaic array, the grid-connection inversion module, the electric energy storage unit and the energy management and automatic monitor unit are connected, the electric energy storage unit comprises a bi-directional inverter and an energy storage device, and the energy storage device is a lithium iron phosphate battery. By means of the mode, the grid-connection energy storage system is mainly used for photovoltaic distributed power stations and large photovoltaic ground power stations and used for solving the problem of instable output of the photovoltaic power stations in the grid-connection process.
Description
Technical field
The present invention relates to a kind of energy-storage system, particularly relate to a kind of grid-connected energy-storage system.
Background technology
1, domestic development situation
China's photovoltaic module output since two thousand seven, occupies the first in the world in continuous 5 years.2011, China's photovoltaic module output was 10 times that increase installed capacity then newly, and the photovoltaic module of 90% needs exportation abroad.
The risk of China's photovoltaic industry heavy dependence overseas market was completely exposed in American-European " two anti-" time.For saving China's photovoltaic industry, country puts into effect the development of policy support distributed photovoltaic power generation this year continuously.In order to respond national policy, State Grid Corporation of China issues distributed photovoltaic power generation related management way, for promoting that solid foundation has been established in the fast development of distributed power generation.
China came into effect bidding for concession from 2009, promoted the construction of ground large photovoltaic plant.In the same year, start " the golden sun " engineering and photoelectricity building demonstrative project, give the subsidy of distributed photovoltaic power generation system, and according to the size of scale of investment, determine to subsidize amount.By the end of the year in 2011, the photoelectricity building demonstrative project scale that country has announced will be about 300,000 kilowatts.The scale that " the golden sun " engineering has been announced is about 1,170,000 kilowatts.Standard, the specification of planning associated in project construction, design, construction, management and operation are unsound, cause manifesting in problem set.
The Correlative plan of national publication proposes, and within 2015, distributed photovoltaic power generation will reach 1,000 ten thousand kilowatts.Meanwhile, clearly propose to encourage the distributed photovoltaic power generation system with Integration of building of building in Middle Eastern.
2014, it was all distributed power station that country increases major part in scale newly to photovoltaic plant, substantially carries out with roof-top manner in distributed power station.Build and will become the trend of following photovoltaic plant with power station, large-sized photovoltaic roof, industrial park.
2, development abroad situation
From external development experience, have some experience can supply to use for reference:
Economic lever is taked to ensure photovoltaic generation installed capacity sustained, stable growth.Germany's Renewable Energy Law defines the subsidy way of photovoltaic generation, and for the application model of all kinds of photovoltaic generations such as roof photovoltaic and ground photovoltaic, its scale is different, and subsidy dynamics is different.
The legal provisions of this state's up-to-date amendment in 2012, the rate for incorporation into the power network of photovoltaic generation divides every kilowatt hour to divide every kilowatt hour to 24.43 Europe from 17.94 Europe.This state also specifies, if installed capacity is more than 3,500,000 kilowatts in following 12 months, rate for incorporation into the power network declines 3%; If more than 7,500,000 kilowatts, rate for incorporation into the power network declines 15%.
Formulate rational distributed photovoltaic power generation way to manage, ensure the safe operation of electrical network.Spain requires that the capacity of the distributed power source that a certain region is installed is less than 50% of the peak load in this region, avoids the anti-power transmission of distributed power source as far as possible.Germany requires that the distributed power source of more than 100 kilowatts must install telecommunication and control device, exerts oneself, and can dispatch so that scheduling understands it in real time.
At present, Hispanic dispatching of power netwoks does not still possess remote monitoring and controls the ability of large-scale photovoltaic generating, reason is the photovoltaic generation installation of project telemetering equipment that transmission of electricity operator only requires more than 10,000 kilowatts, and Spain's also so not large-scale photovoltaic project.Along with increasing of MW class project, these projects lack remote-measuring equipment and will make a significant impact operation of power networks.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of grid-connected energy-storage system, is mainly used in the distributed power station of photovoltaic and large-sized photovoltaic surface power station, for solve photovoltaic plant and network process in instability export problem; Be specifically related to the content of study and practice three aspects of energy storage unit, energy management unit and automatically-monitored unit.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of grid-connected energy-storage system, comprising: photovoltaic array, Inverter Unit, for the control of transformation of electrical energy and current direction energy storage unit, realize power station and automatically control, regulate, dispatch and the energy management that changes of the regulating power controlling energy storage unit and automatically-monitored unit.
Be connected between described photovoltaic array, Inverter Unit, energy storage unit and energy management with automatically-monitored unit.
Include two-way inverter and energy storage device in described energy storage unit, described energy storage device is ferric phosphate lithium cell, and described energy storage unit carries out the conversion of electric energy to energy storage device and the control of current direction is realized by two-way exchange device.
Described energy management and automatically-monitored unit control automatically to power station, regulate, dispatch by with the access of public electric wire net, cut out realization, and electric network state to be detected and according to the power output of photovoltaic module to control the regulating power change of energy storage unit.
In a preferred embodiment, described photovoltaic array is in parallel with energy storage unit, and outputs to 10KV bus, and described energy management and automatically-monitored unit carry out energy management to energy storage unit and monitor in real time.
In a preferred embodiment, battery module is included in described energy storage unit, some battery units are included in described battery module, some battery strings are included in described each battery unit, be in parallel between each battery strings with other battery strings, and carry out energy exchange by two-way exchange device and 10KV bus.
In a preferred embodiment, include some ferric phosphate lithium cells in described battery strings and ferric phosphate lithium cell is carried out to the battery management module of electric energy balanced management.
In a preferred embodiment, controller module and on-site data gathering module is included in described energy management and automatically-monitored unit, include controller and Controller Area Network BUS in described controller module, in described on-site data gathering module, include data acquisition unit; Described on-site data gathering module carries out communication by Controller Area Network BUS, controller and data acquisition unit.
In a preferred embodiment, include peripheral circuit, start control module and MPPT maximum power point tracking module in described Inverter Unit, described start control module and MPPT maximum power point tracking module are connected with between peripheral circuit respectively.
In a preferred embodiment, include pre-charge contactor, DC air breaker, active inversion apparatus, voltage detection module in described peripheral circuit and exchange air circuit, being electrically connected between described pre-charge contactor, DC air breaker, active inversion apparatus, voltage detection module, interchange air circuit.
In a preferred embodiment, include in described start control module the DC side insulating monitoring module judging pre-charge contactor and whether close, data comparison module voltage, current data being compared to judgement, with judge that whether electric current and voltage data synchronous, control the data simultaneous module judging whether interchange air circuit closes, described DC side insulating monitoring module, data comparison module are connected in order successively with data simultaneous module.
The invention has the beneficial effects as follows: 1) energy storage unit: the energy storage unit that the present invention mentions adopts lithium battery as the base unit of power storage, is connected, carries out energy exchange by reversible transducer with 10KV ac bus; 2) energy management and automatically-monitored unit: monitor, control, measure, safeguard and the function such as diagnosis, scheduling; Research automatically realizes with the access of public electric wire net, cuts out, and makes power station, whole roof realize automatic control and adjustment, scheduling; In real time the state of grid side is detected, simultaneously according to the power output of the real-time long pass of photovoltaic system, control the change of the regulating power of energy storage unit, realize the functions such as power smooth, reactive power compensation, peak load shifting.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings, wherein:
Fig. 1 is the Systematical control schematic diagram of a kind of grid-connected energy-storage system one of the present invention preferred embodiment;
Fig. 2 is the electric energy energy-storage units structure chart of a kind of grid-connected energy-storage system one of the present invention preferred embodiment;
Fig. 3 is the energy management of a kind of grid-connected energy-storage system one of the present invention preferred embodiment and automatically-monitored unit schematic diagram;
Fig. 4 is the DCC start control module principle flow chart of a kind of grid-connected energy-storage system one of the present invention preferred embodiment;
Fig. 5 is the Inverter Unit schematic diagram of a kind of grid-connected energy-storage system one of the present invention preferred embodiment.
In accompanying drawing, the mark of each parts is as follows: 1, insulating monitoring module; 2, bypass contactor; 3, pre-charge contactor; 4, external power source; SPD1, direct current surge lightning protection device; SPD2, interchange surge lightning protection device; QF1, DC air breaker; QF2, interchange air circuit; R1, charging resistor; B1, DC filtering; B2, ac filter; VSM1, the first voltage detection module; VSM2, the second voltage detection module; FU, fuse; RH1, temperature sensor; VD, counnter attack diode; ALM, active inversion apparatus; PVGF, active power filtering.
Embodiment
Be clearly and completely described to the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, the embodiment of the present invention comprises:
A kind of grid-connected energy-storage system, comprising: photovoltaic array, Inverter Unit, for the control of transformation of electrical energy and current direction energy storage unit, realize power station and automatically control, regulate, dispatch and the energy management that changes of the regulating power controlling energy storage unit and automatically-monitored unit.
Be connected between described photovoltaic array, Inverter Unit, energy storage unit and energy management with automatically-monitored unit.
Include two-way inverter and energy storage device in described energy storage unit, described energy storage device is ferric phosphate lithium cell, and described energy storage unit carries out the conversion of electric energy to energy storage device and the control of current direction is realized by two-way exchange device;
Described energy management and automatically-monitored unit control automatically to power station, regulate, dispatch by with the access of public electric wire net, cut out realization, and electric network state to be detected and according to the power output of photovoltaic module to control the regulating power change of energy storage unit.
Described photovoltaic array is in parallel with energy storage unit, and outputs to 10KV bus, and described energy management and automatically-monitored unit carry out energy management to energy storage unit and monitor in real time.
Battery module is included in described energy storage unit, some battery units are included in described battery module, include some battery strings in described each battery unit, be in parallel between each battery strings with other battery strings, and carry out energy exchange by two-way exchange device and 10KV bus.
Preferably, the quantity of described battery strings is 4.
Include some ferric phosphate lithium cells in described battery strings and ferric phosphate lithium cell is carried out to the battery management module of electric energy balanced management.
Include controller module and on-site data gathering module in described energy management and automatically-monitored unit, in described controller module, include controller and Controller Area Network BUS, in described on-site data gathering module, include data acquisition unit; Described on-site data gathering module carries out communication by Controller Area Network BUS, controller and data acquisition unit.
Include peripheral circuit, start control module and MPPT maximum power point tracking module in described Inverter Unit, described start control module and MPPT maximum power point tracking module are connected with between peripheral circuit respectively.
Include pre-charge contactor, DC air breaker, active inversion apparatus, voltage detection module in described peripheral circuit and exchange air circuit, being electrically connected between described pre-charge contactor, DC air breaker, active inversion apparatus, voltage detection module, interchange air circuit.
Described voltage detection module includes the first voltage detection module and the second voltage detection module.
Include in described start control module the DC side insulating monitoring module judging pre-charge contactor and whether close, data comparison module voltage, current data being compared to judgement, with judge that whether electric current and voltage data synchronous, control the data simultaneous module judging whether interchange air circuit closes, described DC side insulating monitoring module, data comparison module are connected in order successively with data simultaneous module.
In specifically implementing at one, energy storage unit is set to Large Copacity electrical energy storage systems, includes EMS, i.e. EMS in energy management and automatically-monitored unit.
Described power storage is that a unit designs with 500KWH, every 248 pieces of single-unit ferric phosphate lithium cells are connected, 4 strings carry out parallel connection altogether, carry out energy exchange by PCS equipment (reversible transducer) and 10KV bus, and battery pack there is BMS system (battery management system) to carry out electric energy balanced management.
Whole system carries out secondary software Integrated Development based on PVSS, and whole communication is carried out with CAN form.
In EMS, described CAN, namely controller area network (Controller Area Network) belongs to the category of fieldbus, is a kind of serial communication network of effective support dcs.Be by company of German Bosch the eighties in 20th century be specially automobile industry develop a kind of serial communication bus.More and more be subject to people's attention due to the design of its high-performance, high reliability and uniqueness, be widely used in numerous areas.And any mistake of generation can be detected.When signal transmission distance reaches 10km, CAN still can provide the message transmission rate up to 50kbit/s.Because CAN has very high real-time performance and range of application, the express network reaching as high as 1Mbps from bit rate can be arranged in pairs or groups arbitrarily to the multi 50Kbps network of low cost.Therefore, CAN is own through being widely applied in the fields such as car industry, aircraft industry, Industry Control, security protection.
Along with CAN is in the extensive use in industry-by-industry and field, stricter requirement be it is also proposed to its communication format standardization.1991 CAN technical specification (Version2.0) formulate and issue.This technical specification comprises A and B two parts altogether.Wherein 2.0A gives CAN message reference format, and 2.0B give standard with expansion two kinds of forms.The Automotive Engineering Society SAE of the U.S. proposed J1939 agreement in 2000, and after this this agreement becomes the universal standard of lorry and passenger vehicle middle controller local area network (LAN).
Therefore, in the whole system of native system, field data with the communication of CAN form, then by PLC(Programmable Logic Controller) or data acquisition unit carry out Ethernet telecommunication, data are passed to remote data center, is managed by remote data center.
Include inverter in described Inverter Unit, described inverter is preferably high-power combining inverter.
Described high-power inverter designs based on Siemens S120 system, designed, designed peripheral circuit, DCC control program and MPPT maximum power point tracking algorithm.
Include pre-charge contactor, DC air breaker, active inversion apparatus, voltage detection module in described peripheral circuit and exchange air circuit, being electrically connected between described pre-charge contactor, DC air breaker, active inversion apparatus, voltage detection module, interchange air circuit.
Include in described DCC control program the DC side insulating monitoring module judging pre-charge contactor and whether close, data comparison module voltage, current data being compared to judgement, with judge that whether electric current and voltage data synchronous, control the data simultaneous module judging whether interchange air circuit closes, described DC side insulating monitoring module, data comparison module are connected in order successively with data simultaneous module.
In the concrete enforcement of DCC control program, first judge whether key is pressed, when key is pressed, DC side insulating monitoring module is utilized to detect, judge that insulation sides detects whether to pass through, when obstructed out-of-date, report an error, when passing through, close pre-charge contactor KM1, wait for that bus capacitor charges, and closed upper QF1, then the electric current that 2 voltage detection module VSM1 and VSM2 collect is compared, voltage data, thus judge that whether data are synchronous, when data are asynchronous, return to the electric current comparing VSM1 and VSM2 and collect, voltage data, until data syn-chronization, thus closed QF2.
About MPPT maximum power point tracking algorithm, in native system, adopt triangle test.
Specifically, triangle test refers to and to judge maximum power point by constantly adjusting voltage step size △ U and to control, and finally utilizes threshold value △ U to judge whether to reach optimum point.Near photovoltaic cell P-U characteristic curve peak point, specifically from left to right get voltage and the power of A, B, C tri-points successively, then adjust PWM with the power comparative result of three points, thus realize following the tracks of fast.The method has following four features: (1) algorithm inherently can trace into maximum power point quickly and accurately; (2) avoid near maximum power point because of power loss that disturbance causes, but in 3 comparison procedure, owing to more all needing the voltage and the power that first gather three points at every turn, and system is not operated in maximum power point between Harvest time, cause the loss of power, therefore, after have found maximum power point, interval long time should carry out again at 3 and compare; (3) complexity of algorithm determines needs to process mass data, proposes high requirement to the performance of hardware system; (4) when light intensity is undergone mutation, can not blindly mobile working point, need follow the trail of again after sunshine amount is stable.
Because triangle test adopts software control, in algorithm, " Pa >=Pb and Pb≤Pc " this situation (namely cloud block is had in sky in vain) is included into the situation that system has reached maximum power point, both make same process: do not follow the quick change of sunshine amount and blindly adjust operating voltage, the vibration that the system that avoids is too fast.
This kind of process can cause sub-fraction power loss, but be worth relative to bringing whole system steady running: suppose that original system is on maximum working voltage Umax1, the phase induced current detected is Imax1, the maximum working voltage that sunshine should reach after sudden change is Umax2, phase induced current is Imax2, then the system power loss that mobile working point does not cause is P=Pmax2-Pmax1=Umax2Imax2-Umax1Imax1, because the sun returns to original sunshine amount very soon, the Umax1 do not changed becomes maximum working voltage again, the original stable state of System recover.
In in the concrete enforcement that photovoltaic plant is built, increase the grid-connected energy-storage system that the present invention mentions, have the following advantages:
1, delayed electric grid investment construction, reduced electric energy line loss, there is good energy-saving and emission-reduction benefit;
2, to electrical network, there is certain Peak Load Adjustment;
3, without the need to other occupation of land, land resource has been saved;
4, photovoltaic generation unsteadiness is solved;
5, the quality of power supply of photovoltaic electric station grid connection is improved;
6, improve system band load capacity, alleviate the pressure of bulk power grid.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (8)
1. a grid-connected energy-storage system, it is characterized in that, comprise: photovoltaic array, Inverter Unit, for the control of transformation of electrical energy and current direction energy storage unit, realize power station and automatically control, regulate, dispatch and control the energy management of the regulating power change of energy storage unit and automatically-monitored unit, be connected between described photovoltaic array, Inverter Unit, energy storage unit and energy management with automatically-monitored unit;
Include two-way inverter and energy storage device in described energy storage unit, described energy storage device is ferric phosphate lithium cell, and described energy storage unit carries out the conversion of electric energy to energy storage device and the control of current direction is realized by two-way exchange device;
Described energy management and automatically-monitored unit control automatically to power station, regulate, dispatch by with the access of public electric wire net, cut out realization, electric network state to be detected and according to the power output of photovoltaic module to control the regulating power change of energy storage unit.
2. grid-connected energy-storage system according to claim 1, is characterized in that, described photovoltaic array is in parallel with energy storage unit, and outputs to 10KV bus, and described energy management and automatically-monitored unit carry out energy management to energy storage unit and monitor in real time.
3. grid-connected energy-storage system according to claim 2, it is characterized in that, battery module is included in described energy storage unit, some battery units are included in described battery module, some battery strings are included in described each battery unit, be in parallel between each battery strings with other battery strings, and carry out energy exchange by two-way exchange device and 10KV bus.
4. grid-connected energy-storage system according to claim 3, is characterized in that, includes some ferric phosphate lithium cells and ferric phosphate lithium cell is carried out to the battery management module of electric energy balanced management in described battery strings.
5. grid-connected energy-storage system according to claim 1, it is characterized in that, controller module and on-site data gathering module is included in described energy management and automatically-monitored unit, include controller and Controller Area Network BUS in described controller module, in described on-site data gathering module, include data acquisition unit; Described on-site data gathering module carries out communication by Controller Area Network BUS, controller and data acquisition unit.
6. grid-connected energy-storage system according to claim 2, it is characterized in that, include peripheral circuit, start control module and MPPT maximum power point tracking module in described Inverter Unit, described start control module and MPPT maximum power point tracking module are connected with between peripheral circuit respectively.
7. grid-connected energy-storage system according to claim 6, it is characterized in that, include pre-charge contactor, DC air breaker, active inversion apparatus, voltage detection module in described peripheral circuit and exchange air circuit, being electrically connected between described pre-charge contactor, DC air breaker, active inversion apparatus, voltage detection module, interchange air circuit.
8. grid-connected energy-storage system according to claim 7, it is characterized in that, include in described start control module the DC side insulating monitoring module judging pre-charge contactor and whether close, data comparison module voltage, current data being compared to judgement, with judge that whether electric current and voltage data synchronous, control the data simultaneous module judging whether interchange air circuit closes, described DC side insulating monitoring module, data comparison module are connected in order successively with data simultaneous module.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109412156A (en) * | 2018-11-16 | 2019-03-01 | 东莞市凯登能源科技有限公司 | A kind of electric power orientation transport control system |
| CN110635497A (en) * | 2019-09-12 | 2019-12-31 | 上海丰滋新能源船舶科技有限公司 | Microgrid energy storage device with automatic adjusting function |
| CN110661278A (en) * | 2019-09-12 | 2020-01-07 | 珠海格力电器股份有限公司 | Energy storage air conditioning system and control method and control device thereof |
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| 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 |
| CN109412156A (en) * | 2018-11-16 | 2019-03-01 | 东莞市凯登能源科技有限公司 | A kind of electric power orientation transport control system |
| CN109412156B (en) * | 2018-11-16 | 2021-10-08 | 东莞市凯登能源科技有限公司 | Electric power directional transmission control system |
| CN110635497A (en) * | 2019-09-12 | 2019-12-31 | 上海丰滋新能源船舶科技有限公司 | Microgrid energy storage device with automatic adjusting function |
| CN110661278A (en) * | 2019-09-12 | 2020-01-07 | 珠海格力电器股份有限公司 | Energy storage air conditioning system and control method and control device thereof |
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