CN102545323B - Management method for solar intelligent energy storage system - Google Patents
Management method for solar intelligent energy storage system Download PDFInfo
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- CN102545323B CN102545323B CN201110445760XA CN201110445760A CN102545323B CN 102545323 B CN102545323 B CN 102545323B CN 201110445760X A CN201110445760X A CN 201110445760XA CN 201110445760 A CN201110445760 A CN 201110445760A CN 102545323 B CN102545323 B CN 102545323B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 36
- 238000007726 management method Methods 0.000 title claims abstract description 27
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- 238000004891 communication Methods 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 229910052744 lithium Inorganic materials 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
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- 239000004973 liquid crystal related substance Substances 0.000 description 2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000005955 Ferric phosphate Substances 0.000 description 1
- 229910018095 Ni-MH Inorganic materials 0.000 description 1
- 229910018477 Ni—MH Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- BNOODXBBXFZASF-UHFFFAOYSA-N [Na].[S] Chemical compound [Na].[S] BNOODXBBXFZASF-UHFFFAOYSA-N 0.000 description 1
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- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
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- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
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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
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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 management method for a solar intelligent energy storage system. The management method comprises the following steps of: 1. carrying out initial modulation and storing data; 2. preliminarily determining the maximum power output point by comparing the data stored in the step 1 according to a real-time end voltage; 3. matching a voltage value near the preliminarily determined maximum power output point by using a battery not fully charged, accessing the battery in the system to be charged, measuring the current at the time, and then obtaining real-time output powers of the battery; 4. comparing the plurality of real-time powers obtained in the step 3, executing the matching scheme of the maximum output power, feeding the data to an MCU (microprogrammed control unit) of a master control module, and updating the old and new data by the MCU; and 5. repeating the step 2 to the step 4 till obtaining a termination signal. The management method enables the solar system to continuously work near the maximum power point by virtue of the real-time matching and the automatic switchover work strategy based on logic connection, so as to realize the full utilization of solar energy.
Description
Technical field
The present invention relates to a kind of management method that is applicable to the intelligent energy-storage system of astable electric energy, be particularly related to the automatic switchover working strategies that a kind of real-time matching that can pass through is connected with logic-based, the management method of the intelligent energy-storage system of (namely to the battery charging) so that solar panel is worked near maximum power point.
Background technology
The new forms of energy such as solar energy, wind energy more and more receive people's concern because of its aboundresources, safety non-pollution, but because the unsteadiness of solar energy, wind energy resources needs an energy-storage system to come to provide stable output electric energy for the user.In energy-storage system, electrokinetic cell is the most widely energy storage mode of range of applicability, is fit to almost under any environment, and for guaranteeing the continuous and balanced of power supply, effectively electrokinetic cell energy-storage system management method becomes the key that new forms of energy are used in scale.
Solar energy power generating management system on the existing market and the function of Patents also mainly concentrate on the automatic sun-tracking angle to improve on its radiant illumination, but its cost is generally higher, and instrument is comparatively meticulous, under the weather conditions such as dust storm, sleet, damage easily, further increased the use cost of solar energy, therefore be difficult to accomplish popularization and application, so the solar energy power generating energy storage device on the existing market is in the state that lacks management system.In addition, because wind energy, the new forms of energy such as solar energy are subjected to season, and day and night the effect of natural conditions such as weather is larger, and its time and watt level that produces the available energy is extremely unsettled, has therefore caused the waste of many energy.Such as a solar photovoltaic generation system, the SOC of its stored energy power battery has reached 80%, and this moment is owing to the weather reason, when the output voltage that produces only has normal illumination 50%, then at this time output voltage is just less than the both end voltage of battery, namely this output voltage can't be given power battery charging, also just can't utilize the energy that this moment, system produced.I am called the patent of invention of " a kind of solar energy intelligent energy storage management system " at another name of application, though solved this problem, real-time matching goes out the battery less than the solar panel both end voltage, can charge always.But the power output of this moment is not necessarily maximum.Owing to the variation of charging current along with load changes.Therefore the power output of solar panel changes with the variation of load, exists a maximum power point.And in temperature-resistant situation, there are approximate linear relationship in the open circuit voltage of solar cell and maximum power point voltage.
Summary of the invention
The object of the invention is to overcome the deficiency of existing solar energy intelligent energy storage management system, a kind of automatic switchover working strategies that is connected with logic-based by real-time matching is provided, the operating state that discharges and recharges to each battery in the group manages, near the management method of the intelligent energy-storage system of (namely to the battery charging) so that solar panel is worked maximum power point.
Above purpose is achieved through the following technical solutions:
A kind of management method of solar energy intelligent energy-storage system, described solar energy intelligent energy-storage system comprises: a plurality of battery elementary cells, the solar panel elementary cell is from control module, a main control module; Described battery elementary cell comprises the switch that energy-storage battery, logic-based connect; Described solar panel elementary cell comprises the switch that solar panel, logic-based connect; Described from the control module comprise a plurality of transducers, MCU and wireless communication module; Described main control module comprises memory, MCU, display and wireless communication module, and it may further comprise the steps:
S1: carry out initial modulation, the storage data are in the MCU of main control module;
S2: according to the real time end voltage of solar panel, the data of contrast S1 step storage are tentatively determined its maximum power point (mpp);
S3: use as the battery that is full of matches near the magnitude of voltage the preliminary maximum power point (mpp) of determining among the S2, and with its connecting system charging, can record the electric current of this moment, then can draw its real-time power output;
S4: a plurality of realtime powers that relatively obtain among the S3, select the matching scheme of peak power output to carry out, and with data feedback in the MCU of main control module, this MCU carries out the storage of new data or the correction of old data;
S5: repeating step S2-S4 is until obtain termination signal.
Wherein, initial modulation increases alive maximum power point test step by step for the solar panel to same batch in the described S1 step, namely after the terminal voltage of a selected solar panel, allow MCU in the main control module use energy-storage battery to match from low to high load, and record the real-time current of their places in circuit, thereby draw their realtime power, then by relatively just drawing the maximum power point (mpp) of this terminal voltage; Increase the terminal voltage of solar panel, repeat above-mentioned steps, until reach the maximum terminal voltage that solar panel can produce.
Further, the described voltage that increases step by step is 0.1V or 0.2V.
Wherein, described energy-storage system also can record its real-time temperature parameter in the maximum power point of record solar energy cell panel terminal voltage.
Wherein, the battery of the use underfill in the described S3 step match among the S2 near the preliminary maximum power point (mpp) of determining magnitude of voltage near this point voltage value more than or equal to this point voltage value and less than each 2 of the numerical value of this point voltage value, and this numerical value needs the real time end voltage less than described solar panel.
Further, as one of the numerical value that satisfies its requirement all can't match, and then stops charging procedure.
Further, when using the battery coupling, preferentially use the lower battery of SOC to mate.
Wherein, new data among the described S4 has different or 2 asynchronous maximum power point data all for its real-time terminal voltage and temperature and data in being stored in MCU, described old data be its real-time terminal voltage with temperature be stored in MCU in data identical maximum power point data all.
Positive progressive effect of the present invention is:
Solar energy intelligent energy-storage system management method provided by the invention is compared with existing domestic energy-storage system management method, take the monomer intelligent battery as the basis, be based on the otherness of each battery in objective unsteadiness of admitting the real-time energy of solar energy and the battery pack system, the automatic switchover working strategies that the real-time matching that passes through is connected with logic-based, the operating state that discharges and recharges to each battery in the group manages, solar panel is worked near maximum power point, realize taking full advantage of solar energy.This method for managing system can improve the available capacity of energy-storage system on the one hand, can improve fail safe, the reliability and stability of energy-storage battery group simultaneously, improves the utilization ratio of new forms of energy, has effectively alleviated the workload of system maintenance.
Description of drawings
Fig. 1 is the schematic diagram of battery elementary cell;
Fig. 2 is the schematic diagram of solar panel elementary cell;
Fig. 3 is the system configuration schematic diagram of the embodiment of the invention;
Fig. 4 is the working-flow figure of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated.
Fig. 1 is the schematic diagram of battery elementary cell; Fig. 2 is the schematic diagram of solar panel elementary cell.Among the figure, K
1Be the first switch, K
2Be second switch, K
3Be the 3rd switch, K
4It is the 4th switch; 1 is that the first external-connected port, 2 is that the second external-connected port, 3 is that the 3rd external-connected port, 4 is to connect all round port; B is battery; P is solar panel.When having a plurality of battery elementary cell in the system, the first external-connected port 1 of each battery elementary cell is electrically connected with the second external-connected port 2 of adjacent cell elementary cell.When having a plurality of solar panel elementary cell in the system, its access way can be that a plurality of system construction drawings as shown in Figure 3 directly are in series, also can be each solar panel elementary cell the 3rd external-connected port 3 and adjacent solar panel elementary cell the connect all round port 4 electrical connections; When only having a solar panel elementary cell in the system, that it is in parallel with a plurality of battery elementary cells as charge power supply.
The first K switch
1, second switch K
2, the 3rd K switch
3With the 4th K switch
4Can be diode, triode, relay, thyristor, controllable silicon, metal-oxide-semiconductor, HEMT(High Electron Mobility Transistor) and IGBT in any one, can also be by its bidirectional switch module that combines or device; Described bidirectional switch module and device can be by the module or the device that are equivalent to two PN junctions docking that the controlled PN junctions docking of two break-make characteristics forms or a plurality of PN junction combines, and can also be heterojunction or the two-way controlled module or the device that are combined by a plurality of heterojunction.
Battery B can be in lead-acid battery, Ni-MH battery, sodium-sulphur battery, flow battery, ultracapacitor, ferric phosphate lithium cell, lithium manganate battery, lithium titanate battery and the Graphene lithium battery any one.
During work, the first external-connected port 1 of each battery elementary cell is electrically connected with the second external-connected port 2 of adjacent cell elementary cell.K
1Closure, K
2During disconnection, other adopts the battery B in the same battery elementary cell that arranges to connect in the battery B in this battery elementary cell and the system; K
2Closure, K
1During disconnection, the disconnection that is connected of the battery B in this battery elementary cell and whole system.
Embodiment
Fig. 3 is the system configuration schematic diagram of this management method.As shown in Figure 3,100 is the battery elementary cell, and 200 is from the control module, and 300 are main control module, the 400th, solar panel elementary cell.Solar energy intelligent energy storage management system has comprised a plurality of battery elementary cells 100, solar panel elementary cell and from control module 200, one main control modules 300; Pass through current sensor from control module 200, voltage sensor, temperature sensor regularly detects the voltage of battery and solar panel in its corresponding battery elementary cell 100 and the solar panel elementary cell 400, electric current, these states of temperature, and will detect transfer of data to the MCU in control module 200, this MCU passes to data MCU in the described main control module 300 again by wireless telecommunications Zigbee, the information that MCU storage in the main control module 300 is received, the SOC that shows battery in liquid crystal display, whether solar panel has the information such as fault, and this MCU judges the state of each battery and solar panel according to the information of receiving, then each battery and solar panel are made corresponding control, and control command sent to from the MCU of control in the module by wireless telecommunications Zigbee, the MCU in control module 200 carry out this instruction.The control command that MCU in the main control module 300 that MCU from control module 200 receives sends is disconnection or the closure of each switch in control battery elementary cell 100 and the solar panel elementary cell, thereby so that the battery in this battery elementary cell and the pass between the battery in other battery elementary cell in the whole battery system tie up to disconnection, switch between the series connection, also so that solar panel ties up to the pass of system is connected, switch between the disconnection, to adapt to different charge and discharge process and failure condition.
It is worth mentioning that, although only have 1 solar panel elementary cell in the present embodiment system configuration schematic diagram shown in Figure 3, but in whole energy storage management system, a plurality of solar panels can be arranged, its access way can be that a plurality of system construction drawings as shown in Figure 3 directly are in series, also can be that a plurality of solar panel elementary cells are in series, namely the solar panel elementary cell of a plurality of series connection be placed in the position of solar panel elementary cell in Fig. 3.
Fig. 4 is native system management method workflow diagram.Before system such as Fig. 4 work, need solar panel is carried out initial modulation the storage data.Namely same batch solar panel is increased alive maximum power point test step by step, namely after the terminal voltage of a selected solar panel, allow MCU in the main control module use energy-storage battery to match from low to high load, and record real-time current and the temperature of their places in circuit, thereby draw their realtime powers under this temperature, then by relatively just drawing the maximum power point (mpp) of this terminal voltage under this temperature; Increase the terminal voltage of solar panel, repeat above-mentioned steps, until reach the maximum terminal voltage that solar panel can produce.Because the terminal voltage of solar panel and its maximum power point have one to one relation under fixed temperature, namely definite when temperature, when its terminal voltage was determined, its maximum power point had uniqueness.Although and its maximum power point can be offset when variations in temperature, its deviation range can the real-time matching when using be automatically adjusted and is dwindled, and moves closer to its real maximum power point.Therefore the data of this step storage have important reference value.
As shown in Figure 4, carry out initialization behind the system boot, read the data of storage, demonstration information on the liquid crystal display then then detects voltage, electric current, the state of temperature of each battery and solar panel.If battery and solar panel exist abnormality such as excess Temperature, electric current excessive etc., just with its disconnection that is connected with system.And judge according to the voltage of each battery whether it is full of, with the battery removal that completely fills, simultaneously, tentatively determine its maximum power point according to the storage data in the terminal voltage Data Comparison main control module of the solar panel that detects, and the battery that uses underfill matches near the magnitude of voltage of the preliminary maximum power point (mpp) of determining, this magnitude of voltage can select near this point voltage value more than or equal to this point voltage value and less than each 2 of the numerical value of this point voltage value, and its numerical value needs the real time end voltage less than described solar panel.All can't match if satisfy one of the numerical value of its requirement, then stop charging procedure.If can match, then select the scheme of peak power output to carry out, and with data feedback in the MCU of main control module, this MCU carries out the storage of new data or the correction of old data.New data has different or 2 asynchronous maximum power point data all for its real-time terminal voltage and temperature and data in being stored in MCU, described old data be its real-time terminal voltage with temperature be stored in MCU in data identical maximum power point data all.In carrying out the battery matching process, preferentially use the lower battery of SOC to mate.
Above-mentioned charging modes is so that solar panel is worked near maximum power point always, and the utilance of solar energy has improved greatly.And because the structure of battery and solar panel elementary cell is special, when the battery in one of them battery elementary cell or the cell panel in the solar panel elementary cell break down when being moved out of system, do not affect the operation of whole system, greatly improved Systems balanth and fail safe.And because system preferentially uses the high battery of SOC, can be so that the battery Uniform Discharge in the whole system have been eliminated the short slab phenomenon.
Although more than described the specific embodiment of the present invention; but those skilled in the art is to be understood that; these only illustrate, and under the prerequisite that does not deviate from principle of the present invention and essence, can make various changes or modifications to these execution modes; as increase the detection of battery status; such as pH value, and the switch in a battery elementary cell adopts different kinds, MCU employing Bluetooth RF communication etc.; therefore, protection scope of the present invention is limited by appended claims.
Claims (7)
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| CN201110445760XA CN102545323B (en) | 2011-12-12 | 2011-12-28 | Management method for solar intelligent energy storage system |
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| CN201110412282.2 | 2011-12-12 | ||
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| CN201110445760XA CN102545323B (en) | 2011-12-12 | 2011-12-28 | Management method for solar intelligent energy storage system |
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| CN103066643A (en) * | 2012-12-11 | 2013-04-24 | 南京威阳科技有限公司 | Photovoltaic cell panel with intelligent monitoring and anti-theft functions |
| CN104038140A (en) * | 2014-06-12 | 2014-09-10 | 宁波保税区绿光能源科技有限公司 | Generating method for realizing solar in-out balance |
| CN107887901A (en) * | 2016-09-29 | 2018-04-06 | 维谛技术有限公司 | A kind of supplying power for photovoltaic cell system, MPPT control method and device |
| CN109950960B (en) * | 2019-03-11 | 2025-03-28 | 欧普照明股份有限公司 | A design method for lighting device and lighting device |
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| WO2007149822A2 (en) * | 2006-06-18 | 2007-12-27 | Mythos Solar Energy | Solar power supply with monitoring and communications |
| CN101635540B (en) * | 2009-08-18 | 2012-07-04 | 河海大学 | Method for tracking photovoltaic maximum power point |
| WO2011139803A2 (en) * | 2010-04-27 | 2011-11-10 | Navsemi Energy Private Limited | Method and apparatus for controlling a solar panel output in charging a battery |
| CN102157959B (en) * | 2011-03-30 | 2013-04-10 | 华南理工大学 | Solar photovoltaic contravariant generating system and operation method thereof |
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Address after: Room 1101, No. 2, Lane 288, Qianfan Road, Xinqiao Town, Songjiang District, Shanghai 201612 Patentee after: Shanghai Meikesheng Energy Technology Co.,Ltd. Country or region after: China Address before: Room 1101, No. 2, Lane 288, Qianfan Road, Xinqiao Town, Songjiang District, Shanghai Patentee before: Shanghai Meike Energy Storage Technology Co.,Ltd. Country or region before: China |