CN101867217B - Intelligent power supply inverter and control method - Google Patents

Intelligent power supply inverter and control method Download PDF

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CN101867217B
CN101867217B CN2010101929163A CN201010192916A CN101867217B CN 101867217 B CN101867217 B CN 101867217B CN 2010101929163 A CN2010101929163 A CN 2010101929163A CN 201010192916 A CN201010192916 A CN 201010192916A CN 101867217 B CN101867217 B CN 101867217B
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power
storage battery
power supply
output
switching controller
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CN101867217A (en
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陈立新
孙国圣
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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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/10—Photovoltaic [PV]
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • 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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Abstract

The invention discloses an intelligent power supply inverter, which comprises a charging controller, a current detector, a DC-AC conversion controller, a CPU control module, a power switch, an AC-DC conversion controller and a commercial power charging switch. The invention also discloses a control meted for the intelligent power supply inverter. Through the method, power for the parts with insufficient power can be automatically supplemented according to the power demand of an electrical appliance and the power levels provided by a solar cell and a storage battery in real time; a working mode in which the commercial power is directly used for supplying power can be automatically switched; and a working mode in which the solar cell, the storage battery and the commercial power run simultaneously can be automatically restored. For the households in buildings where a large quantity of solar cells are unavailable due to the limitation of the occupied area, the invention provides a means for utilizing the clean energy source very reasonably, completely and efficiently.

Description

Intelligent power supply inverter and control method
Technical field
The alternating current-direct current change that the present invention relates to power supply and output control and solar cell and storage battery effectively utilize the field, relate in particular to a kind of intelligent energy-saving supply power inversion control device and control method thereof.
Background technology
Inverter is a kind of power supply change-over device, can direct current be converted to meet the required alternating current of general household electrical appliance.Along with the raising of industrial and agricultural production and living standards of the people, also increasing thereupon to the demand of electric power.The mankind require to use more clean energy resource to reduce and pollute the reinforcement of the understanding of environmental protection importance simultaneously.In solar energy and wind power generation field, inverter one of the equipment that is absolutely necessary.
But; Present intelligent power supply inverter need be equipped with enough solar cells or storage battery under normal conditions electric power is provided; The operate as normal that when solar cell and battery power are not enough, just can not keep the electrical appliance of big load; Perhaps promptly enable to let electrical appliance keep work momently but because the restriction of battery capacity, when the voltage of storage battery is low, will export very big electric current and make the storage battery heating, so often shortened the useful life of storage battery.
The intelligent power supply inverter that has can be supplied power separately through commercial power when power consumption is big at power consumption hour through solar cell and storage battery power supply, and this structure is not utilized electric energy fully efficiently.At present, go back the neither one intelligent power supply inverter and can more fully, reasonable also utilize solar power generation efficiently simultaneously, storage battery and commercial power are supplied power.
Summary of the invention
The technical problem that the present invention will solve is: the deficiency to prior art, a kind of intelligent power supply inverter and control method thereof are provided, and can more fully, reasonable also utilize solar energy, storage battery and commercial power to supply power efficiently simultaneously.Under normal conditions by solar cell; The mode that storage battery and commercial power move is simultaneously supplied power to electrical appliance; This device can be adjusted the supply of commercial power according to the output power situation of solar cell and storage battery; And the overall efficiency of reference unit self, when the output power deficiency of solar cell and storage battery, switch to commercial power and directly supply power.When the power output that is full of electricity or solar cell when storage battery reaches certain level, switch to the mode of operation that solar cell, storage battery and commercial power move simultaneously again and supply power.
Technical scheme of the present invention is: a kind of intelligent power supply inverter, comprise charge controller, current detector, CPU control module, DC-AC switching controller, and also comprise electric power switch, AC-DC switching controller and commercial power charge switch; The output of AC-DC switching controller connects the first input end of said DC-AC switching controller via the commercial power charge switch; The output of said electric power switch connects electrical appliance, and input is A port that connects commercial power or the B port that connects DC-AC switching controller output; Said CPU control module is according to the real-time output power level and the product of the intrinsic overall efficiency index of device and the relation of electrical appliance operate as normal required electric power of solar cell and storage battery, and the input of control electric power switch switches between A port and B port.
The more detailed technical scheme of intelligent power supply inverter of the present invention is:
This supply intelligent power supply inverter has been introduced commercial power as not enough the replenishing of output power to solar cell and storage battery; And, between mode of operation that solar cell and storage battery and commercial power move simultaneously and the mode of operation of directly using commercial electric power, switch intelligently according to the real-time output power level of solar cell and storage battery and the product of the intrinsic overall efficiency index of device and the relation of electrical appliance operate as normal required electric power; Electrical appliance operate as normal required electric power is Y; The electric power that solar energy and storage battery provide is X; The intrinsic overall efficiency index of said intelligent power supply inverter is ρ; Then the CPU control module switches to the B port at the switch of the control of condition Y＜when ρ X satisfies electric power switch; The electrical appliance of exporting to of said DC-AC switching controller is supplied power, be operated in the pattern of " solar cell and storage battery and commercial power move simultaneously ", said CPU control module will be according to solar cell and the real-time level of power that provides of storage battery; Regulate the electric power output of said AC-DC switching controller, the partial power of the deficiency of solar cell and storage battery supply is replenished automatically; Control module is at condition Y >=when ρ X satisfies; The switch of control electric power switch switches to the A port; Directly use commercial power that electrical appliance is supplied power, be operated in the pattern of " directly using commercial power ", and when electric power that solar cell and storage battery provided goes back up to the Y that satisfies condition＜ρ X; The CPU control module switches to the B port with the switch of electric power switch again, automatically restores to the mode of operation of " solar cell and storage battery and commercial power move simultaneously ".During concrete the realization, switch according to the magnitude relationship of electric current: the input of electric power switch is at I DC＜ρ (I PV+ I BT) time be the B port that connects the output of DC-AC switching controller, at I DC>=ρ (I PV+ I BT) time be the A port that connects commercial power, wherein I DCBe the electric current of commercial power via the output of AC-DC switching controller, I PVBe the output current of solar cell, I BTBe the output current of storage battery, ρ is the intrinsic overall efficiency index of said intelligent power supply inverter.
Said commercial power charge switch has C and two ports of D; When dialling to the C port; The AC-DC switching controller connects the first input end of said charge controller, and when connecting the D port, the AC-DC switching controller connects the first input end of said DC-AC switching controller; When said intelligent power supply inverter operate as normal, the AC-DC switching controller connects the D port of charge switch.
Said intelligent power supply inverter also comprises temperature sensor; Said CPU control module receives the battery temp information from temperature sensor; And according to this temperature information, the output current of control charge controller when charge in batteries, thereby the charging current of regulating storage battery; Or when battery discharging the output current of control AC-DC switching controller, and then regulate the discharging current of storage battery.
Have communication interface on the said CPU control module, link to each other, be used to set the running parameter of intelligent power supply inverter and the operating state and the resume of output intelligent power supply inverter with computer.
The invention also discloses the control method based on above-mentioned intelligent power supply inverter, the CPU control module is in real time to the real-time output power I of solar cell and storage battery PV+ I BTWith the product of the intrinsic overall efficiency index ρ of intelligent power supply inverter and the electric power I of commercial power output DCRelation compare judgement, control said intelligent power supply inverter in mode of operation that solar cell, storage battery and commercial power are supplied power simultaneously with directly use between the mode of operation of commercial electric power power supply and switch,
Be specially:
When the CPU control module is judged I DC>=ρ (I PV+ I BT) time, the input of control electric power switch switches to the A port that connects commercial power, is the electrical appliance power supply by commercial electric power;
When the CPU control module is judged I DC＜ρ (I PV+ I BT) time, the input of control electric power switch switches to the B port that connects DC-AC switching controller output, is the electrical appliance power supply simultaneously by solar cell, storage battery and commercial power.
The more detailed technical scheme of the control method of intelligent power supply inverter of the present invention is:
The control method of said intelligent power supply inverter is further comprising the steps of: the CPU control module receives also according to the battery temp information from temperature sensor; At the output current of battery state of charge control charge controller, or at the output current of battery discharging State Control AC-DC switching controller.
The control method of said intelligent power supply inverter is further comprising the steps of: the CPU control module is to the voltage V of storage battery BTMonitor, work as V BT≤battery discharging lower voltage limit V MinThe time, the input of CPU control module control electric power switch switches to the A port; Work as V BT>=charge in batteries saturation voltage V MaxThe time, the input of CPU control module control electric power switch switches to the B port.
The control method of said intelligent power supply inverter is further comprising the steps of: the mean charging current upper limit I of storage battery in the certain hour section is set MaxcUpper limit I with average discharge current Max, and the CPU control module is to the electric current I of storage battery BTMonitor; Work as I BT>=I MaxcThe time, CPU control module control charge controller, the maximum output charging current of restriction charge controller is when the battery discharging electric current I BT>=I MaxThe time, CPU control module control AC-DC switching controller, the output current of increase AC-DC switching controller.
Advantage of the present invention is:
1. can utilize solar cell, storage battery and commercial power to supply power simultaneously, make the high-power electric appliance of the electric power that can provide also can operate as normal above storage battery, solar cell.
2. under the electrical appliance working condition of big load, alleviate the burden of storage battery, can prolong the useful life of battery.
3. when the mode of operation that solar cell and storage battery and commercial power move simultaneously, automatically according to the situation of the electric power of storage battery, the supply of real-time regulated commercial power.
4. the overall efficiency that will install self is included reference in; When the output power deficiency of solar cell and storage battery; Can switch to the mode of operation that direct use commercial power is supplied power intelligently; After being full of electricity on storage battery, return the mode of operation that solar cell, storage battery and commercial power move simultaneously.Can more fully, rationally also utilize the electric power and the commercial power of solar energy and storage battery so efficiently.
5. can also utilize commercial power and solar energy to charge a battery together, use, when commercial power grid takes place to have a power failure, also can be used as uninterrupted power supply in addition and use as a special charger.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further described:
Fig. 1 is the illustrative view of functional configuration of the embodiment of intelligent power supply inverter;
Fig. 2 is the power output replenishment control graph of a relation of commercial power and solar cell and storage battery;
Fig. 3 is the electrical construction sketch map of the embodiment of intelligent power supply inverter.
Wherein: 1 solar cell; 2 charge controllers; 3 current detectors; The 4CPU control module; The 5DC-AC switching controller; 6 electric power switchs; The 7AC-DC switching controller; 8 commercial power charge switchs; 9 storage batterys; 10 temperature sensors; 11 communication interfaces; 12 commercial powers; 13 electrical appliances.
Embodiment
Embodiment: the flow of power of the intelligent power supply inverter of present embodiment is to being divided into following 4 kinds of states:
State 1: under the little situation of common power consumption, directly to the electrical appliance power supply, if the electrical appliance load is less, solar power generation also has the electric weight residue by solar cell, and then unnecessary electric weight charges a battery, and this state does not replenish commercial power;
State 2: if the electrical appliance load is bigger, solar power generation can not satisfy the electrical appliance required electric power, and then storage battery and solar cell are simultaneously to the electrical appliance power supply, and this state does not replenish commercial power;
State 3: if the electrical appliance load is very big; Only can not satisfy the needs of electrical appliance with the electric power that solar cell and storage battery provided; Then commercial power also provides part electric power, and this state is the mode of operation of " solar cell and storage battery and commercial power move simultaneously ".
State 4: when state 3; Because the consumption of the electric power of storage battery; The electric power that is provided will reduce gradually, when the output voltage of storage battery is lower than its minimum safe voltage or satisfies the condition of said Y >=ρ X, then automatically switches to the mode of operation of " directly using commercial power to supply power separately ".After storage battery was full of electricity, the commercial power, solar cell, storage battery that automatically restores to state 3 again was together to the pattern of electrical appliance power supply.
As shown in Figure 1, be the illustrative view of functional configuration of the intelligent power supply inverter of present embodiment.The supply intelligent power supply inverter of present embodiment comprises charge controller 2, current detector 3, CPU control module 4, DC-AC switching controller 5, electric power switch 6, AC-DC switching controller 7 and commercial power charge switch 8.
The output of charge controller 2 is connected to storage battery 9 through current detector 3 on the one hand, charges a battery, and is directly connected to second input of DC-AC switching controller 5 on the other hand, is used for to electrical appliance 13 power supplies.The charge controller 2 of present embodiment is to have MPPT (MPPT maximum power point tracking; Maximum Power Point Tracking) syllogic of function and impartial rechargeable charge controller deposit the electric power of solar cell effectively, substantially on storage battery or supply power to electrical appliance through the DC-AC switching controller.Charge controller 2 provides output voltage and the current information of real-time solar cell and accepts the control signal from CPU control module 4 to CPU control module 4, and the maximum power point of solar cell is followed the tracks of and the charging current of storage battery is reasonably regulated.
Current detector 3 is used for the current detecting of accumulator cell charging and discharging.AC-DC switching controller 7 is used for converting commercial ac power power 12 to the direct current that is fit to DC-AC switching controller 5 and the first input end that outputs to the DC-AC switching controller.DC-AC switching controller 5 will convert to from the direct current of first and second input ports and be fit to the interchange that electrical appliance 13 uses, and output to the B port of electric power switch 6.
Said electric power switch 6 outputs connect electrical appliance 13, are input as A port or B port, and the A port connects commercial power 12, and the B port connects the output of DC-AC switching controller 5.If the input of electric power switch 6 switches to the A port, then commercial power directly links to each other with electrical appliance, and intelligent power supply inverter is operated in the pattern of " directly using commercial power "; If the input of electric power switch 6 switches to the B port, then the output of DC-AC switching controller 5 connects electrical appliance, and device is operated in the pattern of " solar cell and storage battery and commercial power move simultaneously ".CPU control module 4 is according to the real-time output power level and the product of the intrinsic overall efficiency index of device and the relation of electrical appliance operate as normal required electric power of solar cell and storage battery, and control electric power switch 6 switches between A and two input ports of B intelligently.
The intelligent power supply inverter of present embodiment also comprises temperature sensor 10, and CPU control module 4 receives the temperature information from the storage battery of temperature sensor, and controls with this current strength to the turnover storage battery.If storage battery is in charged state; The CPU control module passes to charge controller 2 with control signal; Drive the size of the charging current of charge controller 2 its outputs of adjustment; If storage battery is in discharge condition, CPU control module 4 passes to the AC-DC switching controller with control signal, drives the AC-DC switching controller and regulates its output current.
Also have communication interface 11 on the CPU control module 4 of present embodiment; Be used for communicating with computer; On computers with the communication software setting with revise each item running parameter of intelligent power supply inverter, comprise the kind, fixed time section of storage battery and at this moment between the higher limit I of average discharge current in the section Max, mean charging current higher limit I Maxc, battery discharge lower voltage limit value V Min(minimum safe voltage), charging saturation voltage V MaxWith the parameters such as voltage range of each charging stage, also can check the information such as track record and running status of intelligent power supply inverter.CPU control module 4 is according to the upper limit of the charging current of storage battery; Control charge controller 2; Limit its maximum output charging current; And according to the upper limit of the discharging current of storage battery, when the discharging current of storage battery is excessive, increase the output current of AC-DC switching controller 7, thereby reduce the discharging current of storage battery.CPU control module 4 is according to the minimum safe voltage and charging saturation voltage of battery, the charging start and stop of control charge controller 2 and the change action of electric power switch 6; When the voltage of storage battery reaches high charge saturation voltage; Charge controller 2 will get into the floating charge stage under the control of CPU control module 4; When the voltage of storage battery is less than or equal to minimum safe voltage, electric power switch 6 will switch to the A port of direct use commercial power mode of operation under the control of CPU control module 4; If intelligent power supply inverter does not connect the influence that storage battery does not then receive said voltage parameter.
Also be connected with commercial power charge switch 8 between the output of the AC-DC switching controller 7 of present embodiment and the first input end of DC-AC switching controller 5; The input of commercial power charge switch 8 connects the output of AC-DC switching controller 7; The output of commercial power charge switch 8 has C and two ports of D; When dialling to the C port; AC-DC switching controller 7 connects the first input end of said charge controller 2, and when dialling to the D port, AC-DC switching controller 7 connects the first input end of said DC-AC switching controller 5; When said intelligent power supply inverter operate as normal, the port to D is dialled in the output of commercial power charge switch 8.If do not specify, refer to that all intelligent power supply inverter is operated in normal mode, AC-DC switching controller 7 connects the D port of commercial power charge switch 8.
Be connected with control signal wire respectively between the CPU control module 4 of present embodiment and charge controller 2, current detector 3, DC-AC switching controller 5, electric power switch 6, AC-DC switching controller 7, the temperature sensor 10.The output current of CPU control module 4 control charge controllers 2 reaches and obtains output current, the information of voltage of solar cell from it.CPU control module 4 is accepted the current information I of current detector 3 BTInformation of voltage V with storage battery BTAnd the output voltage V of control AC-DC switching controller 7 DCAnd electric current I DCSize.Control the action of electric power switch 6 according to the comparison of the output power of the output power of AC-DC switching controller 7 and solar cell, storage battery and with reference to the intrinsic overall efficiency of self; Carry out the switching between A mouth and the B mouth, this comparison will elaborate in the back.
Under solar cell and the normal situation of battery power; The input that CPU control module 4 will be controlled electric power switch 6 switches to the B port that links to each other with the electric power output of DC-AC controller 5; At this moment, commercial power 12 is through the D port inflow DC-AC switching controller 5 of AC-DC switching controller 7 via commercial power charge switch 8.Solar cell, storage battery and commercial power are supplied power to electrical appliance through DC-AC switching controller 5 simultaneously.
At insufficient space, the place of solar panel can not be set in a large number, such as the balcony in common apartment, the intelligent power supply inverter of present embodiment just can be brought into play its speciality, and set a small amount of solar cell is made full use of, and plays the economize on electricity effect.For example; If the solar cell that is provided with is 400W with the power that additional storage battery can provide; Can't directly drive the electric rice cooker of a 800W; If but used the intelligent power supply inverter of present embodiment, provide 400W to replenish not enough power by commercial power 12 in addition, electric rice cooker is with regard to the ability normal operation like this.With respect to the occasion of whole use commercial powers, so only used half the electric power.Thereby make that the electric power of " dabbler " not only is utilized effectively but also promoted environmental protection originally.In addition,, so do the burden that can also suitably alleviate storage battery, play the effect of extending battery life in the occasion of using big load electrical appliance.
Suppose the power that solar cell and storage battery provide and be X, the power of electrical appliance consumption is Y, and the efficient of AC-DC switching controller 7 is ρ 1, the efficient of DC-AC switching controller 5 is ρ 2, then work as
Y = X · ρ 2 1 - ρ 1 ρ 2 = ρ · X - - - ( 1 )
The time, the electric power that solar cell and storage battery provided is just in time all fallen by intelligent power supply inverter self consumption in operation, and the power that commercial power provides equals the power that electrical appliance consumes.ρ=the ρ of formula (1) and (2) lining 2/ (1-ρ 1ρ 2) be the intrinsic overall efficiency index of this intelligent power supply inverter.Therefore work as
Y ≥ X · ρ 2 1 - ρ 1 ρ 2 = ρ · X - - - ( 2 )
The time, CPU control module 4 will produce control signal, make electric power switch 6 switch to the A port, and commercial power 12 is directly connected on the electrical appliance 13, make the DC-AC switching controller stop conversion work simultaneously, get into the sleep electricity-saving state.Intelligent power supply inverter will be operated in the mode of operation of " directly using commercial power " this moment.
When concrete the realization, the relational expression (2) of power is converted to the relation of electric current and voltage.Definition I PVBe the output current of charge controller 2, promptly from the electric current of solar cell.I BTBe the output current of storage battery, I MaxBe the storage battery upper limit (this is in order to protect the higher limit of the average output current that can in certain hour section (such as 16 to 256 seconds), set arbitrarily that storage battery is provided with) of the maximum average discharge current in the section at the appointed time.I DCBe the output current of AC-DC switching controller 7, V BTOutput voltage for storage battery; V MinBe the lower voltage limit of storage battery, this parameter is provided with in order to protect storage battery, and it is relevant with battery types, and battery variety is different with rated voltage, V MinDifferent.Such as, be that the lithium battery of 25.9V is 21V for rated voltage, be that the lead-acid battery of 24V is 20V for rated voltage.When
I DC ≥ ( I PV + I BT ) · ρ 2 1 - ρ 1 ρ 2 - - - ( 3 )
Perhaps
V BT≤V min (4)
In any formula when setting up, intelligent power supply inverter just automatically switches to the mode of operation of " directly using commercial power ".I PV+ I BTDetection be to implement by Fig. 1 or the current detector between charge controller 2 and DC-AC switching controller 5 shown in Figure 3, its information is by CPU control module 4 timing acquiring.
For example, the rated output voltage that provides on the market at present is that the efficient of 24 volts AC-DC switching controller and the specified input voltage DC-AC switching controller that is 24 volts is generally about 85%, reasonable can reaching more than 90%.In theory, if conversion efficiency is all under 85% the situation, carries it into formula (3) and can obtain I DC>=3.063 (I PV+ I BT), even the output current of AC-DC switching controller 7 be charge controller and storage battery output current and more than 3 times, then switch to the pattern of " directly using commercial power ".If conversion efficiency is all under 90% the situation, can know by formula (3), work as I DCBe I approximately PV+ I BTMore than 4.7 times the time, then switch to the pattern of " directly using commercial power ".
In addition, solar cell, storage battery and commercial power and use operational mode, can not make the power supply output current of storage battery reduce to I when the commercial power of AC-DC switching controller 7 is exported when transferring to maximum MaxEven below or the power supply output current of storage battery less than I MaxBut conditional (3) is when being satisfied, and the CPU control module will be sent signal and make it switch to the A port for the electric power switch, and intelligent power supply inverter gets into the mode of operation of " directly using commercial power ".
When intelligent power supply inverter was in the mode of operation of " directly using commercial power ", solar cell charged a battery, as the voltage V of storage battery BT(or input voltage of DC-AC transform controller) goes back up to saturation voltage V once more MaxWhen (voltage when battery is full of electricity and reaches capacity state); CPU control module 4 will produce control signal; Make 6 inputs of electric power switch switch to the B port; Wake the DC-AC switching controller simultaneously up and carry out conversion work, that device switches to solar cell, storage battery and commercial power again and use operational mode.
Solar cell and the not enough partial power of storage battery replenished when the AC-DC switching controller 7 of present embodiment moved intelligent power supply inverter automatically, and according to the electric power output state of solar cell and storage battery the magnitude of recruitment of commercial power were adjusted automatically accordingly.CPU control module timing acquiring is via the storage battery input and output current strength of current detector 3, if in the time period (16～256 seconds) of appointment the output current I of storage battery BTMean value surpasses the upper current limit I that sets MaxThe time, will be through regulating the output voltage V of AC-DC switching controller 7 DC, increase its output current, thereby realize reducing the output current of storage battery.V DCValue by following conditional decision:
Under the mode of operation of " solar cell and storage battery and commercial power move simultaneously ", if be in the battery discharging state, explain and only can not satisfy the load required electric power this moment with the power supply of solar cell,
V DC＝V max-α·Δ (5)
Wherein, α is the adjustment coefficient of commercial power magnitude of recruitment, and it is relevant with the power output size of solar cell and storage battery.Common 0≤α≤1.Δ is according to the rated operational voltage of the kind of storage battery and DC-AC switching controller 5 and set, and for example, is 24V for the rated operational voltage of DC-AC switching controller, lead-acid battery be full of the situation that saturation voltage is 28V, Δ can be made as 1～4V.The value of Δ can be passed through computer or communication software setting and modification.
When the electric power of solar cell and storage battery satisfies the electrical appliance use, and the output current I of storage battery BT＜I Max, the CPU control module will be provided with α=1.This moment storage battery voltage V BT＞V DC, the AC-DC switching controller does not have electric current output, is only supplied power to electrical appliance by solar cell and storage battery.
When the electric power of solar cell and storage battery can not satisfy the electrical appliance use, the CPU control module was provided with 0≤α＜1, carried out suitably replenishing with commercial power, and the α of setting is more little, and the output voltage of AC-DC switching controller is big more, and the commercial electric power that replenishes is just many more.Still there is I as if α=0 that is provided with BT>=I MaxThe time, then switch to the mode of operation of " directly using commercial power ".
Under the mode of operation of " solar cell and storage battery and commercial power move simultaneously ", if storage battery is in charged state, then explanation this moment only with the power supply of solar cell just can satisfy load required electric power and have unnecessary, at this moment
V DC＝V min+Δ (6)
This moment voltage V DCThat sets is relatively low, and purpose is not allow the AC-DC switching controller that electric current output is arranged, only by solar cell for supplying power.Fig. 2 is the power output replenishment control graph of a relation of commercial power and solar cell and storage battery.Wherein, abscissa I represents the output current of each power components, and ordinate is the output voltage of each power components, and voltage takes advantage of electric current to be power.Vertical bar line zone is the power curve of the output stack of storage battery and solar cell among the figure, the output characteristic of slanted bar line among the figure and horizontal stripe line region representation AC-DC switching controller.Under the normal condition, the AC-DC switching controller is output as slanted bar line zone, and when the output of storage battery surpassed the discharge maximum of appointment, the AC-DC switching controller was output as horizontal stripe line zone.
The commercial power charge switch 8 of present embodiment is a hand gear, when operate as normal, switch is dialled the side to D, makes the first input end of AC-DC switching controller 7 connection DC-AC switching controllers 5, is the normal operation mode of above-mentioned intelligent power supply inverter.The intelligent power supply inverter of present embodiment is not only supported to charge a battery with solar cell, and in needs, can charge a battery with commercial power.8 groups of commercial power charge switchs make the output of AC-DC switching controller 7 connect the first input end of charge controller 2 when the C side, and second input of charge controller 2 connects solar cell 1.Charge controller 2 will be from the electric power of commercial electrical network and solar energy simultaneously to charge in batteries, thereby shortens the charging interval of storage battery.The CPU control module will be sent signal to the DC-AC switching controller this moment, stop its conversion work and make it get into the sleep electricity-saving state.
Fig. 3 is the electrical construction sketch map of the intelligent power supply inverter of present embodiment.
The above is merely the preferred embodiments of the present invention, can not limit the scope that the present invention implements with this, and all simple conversion of doing according to claim of the present invention and description all should still belong to the protection range that the present invention covers.

Claims (8)

1. intelligent power supply inverter; Comprise charge controller (2), current detector (3), CPU control module (4), DC-AC switching controller (5), it is characterized in that: also comprise electric power switch (6), AC-DC switching controller (7) and commercial power charge switch (8); And AC-DC switching controller (7) connects said commercial power charge switch (8); Said commercial power charge switch (8) has C and two output ports of D; When AC-DC switching controller (7) connects the C port; The output of AC-DC switching controller (7) connects the first input end of said charge controller (2), and when AC-DC switching controller (7) connected the D port, the output of AC-DC switching controller (7) connected the first input end of said DC-AC switching controller (5); The output of said electric power switch (6) connects electrical appliance (13), and input is A port that connects commercial power (12) or the B port that connects DC-AC switching controller (5) output; Said CPU control module (4) is according to real-time output power level and the product of the intrinsic overall efficiency index of intelligent power supply inverter and the relation of electrical appliance operate as normal required electric power of solar cell and storage battery, and the input of control electric power switch (6) switches between A port and B port.
2. according to the intelligent power supply inverter described in the claim 1, it is characterized in that: the input of electric power switch (6) is at I DC＜ρ (I PV+ I BT) time be the B port that connects DC-AC switching controller (5) output, at I DC>=ρ (I PV+ I BT) time be the A port that connects commercial power (12), wherein I DCBe the electric current of commercial power via AC-DC switching controller (7) output, I PVBe the output current of solar cell, I BTBe the output current of storage battery, ρ is the intrinsic overall efficiency index of said intelligent power supply inverter.
3. intelligent power supply inverter according to claim 1 and 2 is characterized in that: also comprise being used to monitor the temperature of storage battery (9) and the temperature sensor (10) that links to each other with CPU control module (4).
4. intelligent power supply inverter according to claim 1 and 2 is characterized in that: also be connected with on the said CPU control module (4) and be used for the communication interface (11) that links to each other with computer.
5. the control method of the intelligent power supply inverter described in claim 1 is characterized in that: the real-time real-time output power I to solar cell and storage battery of CPU control module (4) PV+ I BTWith the electric current I of the required additional commercial power of the product of the intrinsic overall efficiency index ρ of intelligent power supply inverter and electrical appliance operate as normal via AC-DC switching controller (7) output DCRelation compare judgement, control said intelligent power supply inverter in mode of operation that solar cell, storage battery and commercial power are supplied power simultaneously with directly use between the mode of operation of commercial electric power power supply and switch, be specially:
When CPU control module (4) is judged I DC>=ρ (I PV+ I BT) time, the input of control electric power switch (6) switches to the A port that connects commercial power (12), is electrical appliance (13) power supply by commercial electric power;
When CPU control module (4) is judged I DC＜ρ (I PV+ I BT) time, the input of control electric power switch (6) switches to the B port that connects DC-AC switching controller (5) output, is electrical appliance (13) power supply simultaneously by solar cell, storage battery and commercial power.
6. according to the control method of the intelligent power supply inverter described in the claim 5; It is characterized in that further comprising the steps of: CPU control module (4) receives also according to the battery temp information from temperature sensor (10); At the output current of storage battery (9) charged state control charge controller (2), or at the output current of storage battery (9) discharge condition control AC-DC switching controller (7).
7. according to the control method of the intelligent power supply inverter described in the claim 5, it is characterized in that further comprising the steps of: CPU control module (4) is to the voltage V of storage battery (9) BTMonitor, work as V BT≤battery discharging lower voltage limit V MinThe time, the input of CPU control module (4) control electric power switch (6) switches to the A port; Work as V BT>=charge in batteries saturation voltage V MaxThe time, the input of CPU control module (4) control electric power switch (6) switches to the B port.
8. according to the control method of the intelligent power supply inverter described in the claim 5, it is characterized in that further comprising the steps of: the mean charging current upper limit I of storage battery in the certain hour section is set MaxcUpper limit I with average discharge current Max, and CPU control module (4) is to the electric current I of storage battery (9) BTMonitor; When the charge in batteries electric current I BT>=I MaxcThe time, CPU control module (4) control charge controller (2), the maximum output charging current of restriction charge controller (2) is when the battery discharging electric current I BT>=I MaxThe time, CPU control module (4) control AC-DC switching controller (7), the output current of increase AC-DC switching controller (7).
CN2010101929163A 2009-12-27 2010-05-27 Intelligent power supply inverter and control method Expired - Fee Related CN101867217B (en)

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CN102457709A (en) * 2010-10-25 2012-05-16 鸿富锦精密工业（深圳）有限公司 Monitoring system
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KR101405147B1 (en) * 2012-09-19 2014-06-10 로얄앤컴퍼니 주식회사 Apparatus and method for controling self-generation faucet
CN102856977B (en) * 2012-09-25 2015-05-20 广东易事特电源股份有限公司 Solar uninterrupted power system based on serial peripheral interface (SPI)
CN103986183B (en) * 2014-03-31 2016-05-11 江苏省电力公司盐城供电公司 A kind of grid-connected control system
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CN108776528A (en) * 2018-05-28 2018-11-09 合肥联宝信息技术有限公司 A kind of thermo-electric generation module, electronic equipment and Heat Treatment method
WO2020080594A1 (en) * 2018-10-16 2020-04-23 (주)에너캠프 Smart balancing energy charging control system
CN112398214A (en) * 2020-10-27 2021-02-23 国网山东省电力公司昌邑市供电公司 Rechargeable solar external power supply device and electric energy meter power supply system
CN112421150B (en) * 2020-12-10 2022-04-19 东莞市创明电池技术有限公司 Lithium battery heating circuit
CN116111714B (en) * 2023-04-11 2023-07-07 浙江德塔森特数据技术有限公司 Uninterruptible power supply, control method and device thereof and readable medium

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1620744A (en) * 2002-02-15 2005-05-25 慎亨范 Portable charging apparatus having a charging battery built-in
CN201813203U (en) * 2009-10-27 2011-04-27 陈立新 Intelligent power supply inverter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1620744A (en) * 2002-02-15 2005-05-25 慎亨范 Portable charging apparatus having a charging battery built-in
CN201813203U (en) * 2009-10-27 2011-04-27 陈立新 Intelligent power supply inverter

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