CN108539774A - Solar air power-driven light boat hybrid accumulator energy manager - Google Patents

Solar air power-driven light boat hybrid accumulator energy manager Download PDF

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Publication number
CN108539774A
CN108539774A CN201810387220.2A CN201810387220A CN108539774A CN 108539774 A CN108539774 A CN 108539774A CN 201810387220 A CN201810387220 A CN 201810387220A CN 108539774 A CN108539774 A CN 108539774A
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China
Prior art keywords
power
lithium battery
super capacitor
charge
distribution
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CN201810387220.2A
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Inventor
孙玉伟
赵晓兴
尹翔
刘邓华
姜坤
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Wuhan University of Technology WUT
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Wuhan University of Technology WUT
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Priority to CN201810387220.2A priority Critical patent/CN108539774A/en
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Pending legal-status Critical Current

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30Systems combining energy storage with energy generation of non-fossil origin

Abstract

The invention discloses a kind of solar air power-driven light boat hybrid accumulator energy managers,Lithium battery module in hybrid accumulator,Super capacitor module passes through its corresponding lithium battery DC/DC reversible transducer respectively,Super capacitor DC/DC reversible transducers are connected in parallel to DC bus,Four levels of linkages formula energy manager is according to the DC bus power swing situation combination lithium battery module acquired in real time,Super capacitor module power and state-of-charge,It is distributed by level Four power optimization and obtains lithium battery module and super capacitor module storage energy operation scheme,And output control signals to corresponding lithium battery DC/DC reversible transducers,Super capacitor DC/DC reversible transducers ensure the power-balance of DC bus,Compensation of the energy-storage system to load blocks and photovoltaic generating module power swing is completed in time,Ensure the Effec-tive Function of solar air power-driven light boat.

Description

Solar air power-driven light boat hybrid accumulator energy manager
Technical field
The invention belongs to air force ship technical field more particularly to a kind of solar air power-driven light boat hybrid accumulators Energy manager.
Background technology
Watercraft electric propulsion system is in practice with mobility is good, reliability is high, operational efficiency is high, arrangement is clever Advantage living, easy to maintain etc., the wherein output power of photovoltaic distributed generation unit have intermittent and randomness Feature, and the variation of load also has randomness, this brings larger challenge to power grid operation.Energy storage technology is introduced into electricity Force system stores and provides energy, impact when can also prevent ship from loading acute variation to power grid for electric propulsion system.
There are mainly four types of forms, including battery energy storage, super capacitor energy-storage, super conductive magnetic storage energy for existing energy storage system And flywheel energy storage.It is analyzed according to the characteristics of four kinds of stored energy forms, determines that single energy storage technology cannot be satisfied all applications The demand of pattern.Different energy storage technologies should be used in combination by perfect control flow by specific controller, coordinate control System constitutes hybrid accumulator, to play the strong point of different energy storage technologies to the maximum extent, to meet marine electric power propulsion system The application demand of system.
Invention content
The technical problem to be solved by the invention is to provide a kind of solar air power-driven light boat hybrid accumulator energy pipes Manage device, it is ensured that the case where output power intermittence and bearing power the variation randomness of photovoltaic distributed generation unit fluctuate Under, energy storage device can in time compensate grid power fluctuation, to improve solar air power-driven light boat electric propulsion system System stability, ensures the stable operation of solar air power-driven light boat.
The technical solution adopted by the present invention to solve the technical problems is:A kind of solar air power-driven light boat mixing storage is provided Energy device energy manager, hybrid accumulator includes lithium battery module, super capacitor module, lithium battery module, super electricity Molar group is connected in parallel to direct current by its corresponding lithium battery DC/DC reversible transducer, super capacitor DC/DC reversible transducers respectively Busbar, four levels of linkages formula energy manager receive lithium battery module, the voltage of super capacitor module, electric current, calculate the work(of the two Rate and state-of-charge, lithium battery DC/DC reversible transducers, super capacitor DC/DC reversible transducers receive four levels of linkages formula respectively The control signal of energy manager, four levels of linkages formula energy manager for control hybrid accumulator output power be allowed to directly The compensation power that stream busbar requires matches.
According to the above technical scheme, four levels of linkages formula energy manager is according to DC bus power swing combination lithium battery mould Group, super capacitor module power and state-of-charge by sub-distribution at the beginning of the compensation power based on high low-pass filtering, are based on super electricity The compensation power of container SOC is reallocated, super-charge super-discharge coordinates control, the level Four power point of instantaneous maximum charge-discharge electric power limitation Match, obtains the control signal of lithium battery module and super capacitor module.
According to the above technical scheme, described by based on sub-distribution at the beginning of the compensation power of high low-pass filtering, specially lithium battery Module and the predistribution of super capacitor module power;The compensation power based on ultracapacitor SOC value is reallocated, and is specially existed Under the premise of ensureing that hybrid accumulator power is constant, time constant filter is adjusted pre- according to super capacitor module state-of-charge Second of power distribution is carried out on the basis of distribution;Super-charge super-discharge coordinates control, specially according to lithium battery module state-of-charge The power of the second sub-distribution of constraint pair of limitation and the limitation of super capacitor module state-of-charge carries out third sub-distribution;It is instantaneous maximum Charge-discharge electric power limits, specially according to lithium battery module maximum charge-discharge electric power and super capacitor module maximum charge-discharge electric power Constraint the 4th sub-distribution is carried out to the power of third sub-distribution.
According to the above technical scheme, after based on sub-distribution at the beginning of the compensation power of high low-pass filtering, lithium battery just sub-distribution Power PLi1For:
The first distribution power P of super capacitorSC1For:
In formula:S is Laplace transformation complex variable, tsFor low-pass filtering time constant, the power for needing to compensate according to lithium battery Frequency selection purposes, PHESEPower is compensated for hybrid accumulator.
According to the above technical scheme, after the compensation power redistribution process based on ultracapacitor SOC, lithium battery module Secondary distribution power PLi2For:
Super capacitor module secondary distribution power PSC2For:
In formula:Δ T is low-pass filtering time constant adjusted value.
According to the above technical scheme, after super-charge super-discharge coordinates control process, lithium battery module distribution power P three timesLi3 For:
SOC in formulamax、SOChigh、SOClow、SOCmin、SOCLiThe respectively limit value of forbidding charging of lithium battery module, electric discharge Warning limit value, forbids charge limit value, real-time state-of-charge at charging warning limitation;
Super capacitor module distribution power P three timesSC3For:
SOC` in formulamax、SOC`high、SOC`low、SOC`min、SOCSCRespectively super capacitor module forbid charge limit value, Electric discharge warning limit value, forbids charge limit value, real-time state-of-charge at charging warning limitation.
According to the above technical scheme, after instantaneous maximum charge-discharge electric power limit procedure, four sub-distribution work(of lithium battery module Rate PLi4For:
Four sub-distribution power P of super capacitor moduleSC4For:
Wherein,For lithium battery module charge-discharge electric power bound,For Super capacitor module charge-discharge electric power bound.
The beneficial effect comprise that:
1) the power reallocation control strategy based on ultracapacitor SOC so that ultracapacitor contribute variation with fill Electric discharge switching is more frequent, it can be ensured that the continuous output fluctuation range of lithium battery module controls within 5%, can improve The operational efficiency of super capacitor module and lithium battery module.
2) use super-charge super-discharge to coordinate control and maximum power Preservation tactics, make the SOC of lithium battery change in 25~ In 95% section, it can be ensured that the safe operation of lithium battery;The SOC value variation of ultracapacitor is in 20~95% sections, really It protects ultracapacitor and possesses power regulation ability always.
3) four levels of linkages formula energy manager ensures that lithium battery module and super capacitor module have more excellent response Effect, and complete to mix compensation of the energy-storage system to load and photo-voltaic power supply power swing in time, ensure solar air power The lasting Effec-tive Function of ship.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the structural schematic diagram of solar air power-driven light boat hybrid accumulator energy manager of the embodiment of the present invention;
Fig. 2 is that four levels of linkages formula energy manager runs control flow chart;
Fig. 3 lithium batteries and ultracapacitor SOC value block plan;
Fig. 4 is the time constant filter adjustment control chart based on ultracapacitor SOC value;
Fig. 5 is that lithium battery maximum charge-discharge electric power limits control figure;
Fig. 6 is that ultracapacitor maximum charge-discharge electric power limits control figure;
Wherein:1. lithium battery module, 2. super capacitor modules, 3. lithium battery DC/DC reversible transducers, 4. super capacitors DC/DC reversible transducers, 5. four levels of linkages formula Energy Management System, 6. DC bus, 7. photovoltaic generating modules, 8. direct currents are negative It carries.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not For limiting the present invention.
In the embodiment of the present invention, a kind of solar air power-driven light boat hybrid accumulator energy manager is provided, such as Fig. 1 institutes Show, hybrid accumulator includes lithium battery module, super capacitor module, and lithium battery module, super capacitor module pass through respectively Its corresponding lithium battery DC/DC reversible transducer, super capacitor DC/DC reversible transducers are connected in parallel to DC bus, four levels of linkages Formula energy manager receives lithium battery module, the voltage of super capacitor module, electric current, calculates the power and state-of-charge of the two, Lithium battery DC/DC reversible transducers, super capacitor DC/DC reversible transducers receive the control of four levels of linkages formula energy manager respectively Signal processed, four levels of linkages formula energy manager are used to control hybrid accumulator output power and are allowed to benefit with DC bus requirement Power is repaid to match.
Further, four levels of linkages formula energy manager is according to DC bus power swing combination lithium battery module, super Electric capacity module power and state-of-charge by sub-distribution at the beginning of the compensation power based on high low-pass filtering, are based on ultracapacitor SOC Compensation power reallocate, super-charge super-discharge coordinates control, the level Four power distribution of instantaneous maximum charge-discharge electric power limitation, obtain lithium The control signal of battery modules and super capacitor module.
1. the first assigning process of compensation power based on high low-pass filtering:Divide in advance for lithium battery module and super capacitor module With power.
2. the compensation power redistribution process based on ultracapacitor SOC:Ensureing that hybrid accumulator power is constant Under the premise of, consider that super capacitor module state-of-charge adjustment time constant filter carries out second of power on the basis of predistribution Distribution.
3. super-charge super-discharge coordinates control process:Consider the limitation of lithium battery module state-of-charge and the charged shape of super capacitor module The power of the second sub-distribution of constraint pair of state limitation carries out third sub-distribution.
4. instantaneous maximum charge-discharge electric power limit procedure:Consider lithium battery module maximum charge-discharge electric power and super capacitor mould The constraint of the maximum charge-discharge electric power of group carries out the 4th sub-distribution to the power of third sub-distribution.
The first assigning process of compensation power based on high low-pass filtering is specially:Hybrid accumulator power back-off is instructed PHESEIt is filtered, by PHESEIn low frequency component as in hybrid accumulator lithium battery module power back-off instruct PLi1, By PHESEIn other frequency components as in hybrid accumulator super capacitor module power back-off instruction, setting power it is big Electric discharge is indicated in zero, is less than zero and is indicated to charge, then the power distribution of hybrid accumulator such as following formula:
In formula:S is Laplace transformation complex variable, tsFor low-pass filtering time constant, the power for needing to compensate according to lithium battery Frequency selection purposes.
In hybrid accumulator, there are energy transfers between lithium battery and ultracapacitor, this will increase lithium battery The change rate of charge-discharge electric power, and for hybrid accumulator compensation general power PHESEFor do not play a role.By right Time constant filter is adjusted, and so that this portion of energy shifted between lithium battery and ultracapacitor is reduced, according to Fig.2, Time constant filter based on ultracapacitor SOC value adjust flow chart, avoid ultracapacitor self-energy saturation or Exhaustion, when increasing or reducing filter time constant, SOC value of the foundation ultracapacitor in normal range of operation is Boundary is adjusted time constant filter, that is, carries out the second sub-distribution of power.
After the compensation power redistribution process based on ultracapacitor SOC, lithium battery module secondary distribution Power PLi2For:
Super capacitor module secondary distribution power PSC2For:
In formula:Δ T is low-pass filtering time constant adjusted value.
Since the lithium battery module of energy storage device and the capacity of super capacitor module are limited, setting super-charge super-discharge is coordinated Control link of protection.In conjunction with the real work operating index data of lithium battery and ultracapacitor, by the charged shape of energy storage device State is divided into 5 regions shown in Fig. 3, is charging exclusion area, charging security area, normal work area, electric discharge security area and electric discharge respectively Exclusion area.It, can not for charge and discharge request when the state-of-charge of lithium battery and ultracapacitor is in non-normal working area It fully meets, therefore its discharge power is adjusted, that is, complete third time power distribution:
After the super-charge super-discharge coordinates control process, lithium battery module distribution power P three timesLi3For:
SOC in formulamax、SOChigh、SOClow、SOCmin、SOCLiThe respectively limit value of forbidding charging of lithium battery module, electric discharge Warning limit value, forbids charge limit value, real-time state-of-charge at charging warning limitation.
Super capacitor module distribution power P three timesSC3For:
SOC` in formulamax、SOC`high、SOC`low、SOC`min、SOCSCRespectively super capacitor module forbid charge limit value, Electric discharge warning limit value, forbids charge limit value, real-time state-of-charge at charging warning limitation.Fig. 4 is based on ultracapacitor SOC value Time constant filter adjustment control chart.
Since external disturbance is likely to occur the situation of power swing exception in real system operation, leads to lithium battery and surpass Grade capacitor transient state charge-discharge electric power instruction can reach its threshold limit value, these when lithium battery or ultracapacitor cannot Complete power back-off instruction, it is therefore desirable to the further power instruction of modification lithium battery and ultracapacitor.By Fig. 5 and Fig. 6 institutes Show lithium battery maximum discharge power limitation flow chart and ultracapacitor maximum discharge power limitation flow chart, when a kind of energy storage is set When standby electric discharge or charge power exceeds its maximum electric discharge or charge power limit system, make it according to maximum electric discharge or charging work( Rate carries out charge and discharge, and another energy storage device decides whether additional according to the SOC situation combination normal range of operation of its own Compensation exceeds Partial Power.Meanwhile needing to judge the power back-off range whether power instruction PX has exceeded energy storage device, certainly Body situation can be with the adequate compensation Partial Power when allowing, and power instruction PX carries out corresponding adjustment, if it was exceeded, by this The power instruction of kind energy storage device is also set as its corresponding power limit value, that is, completes the 4th power distribution.
After the instantaneous maximum charge-discharge electric power limit procedure, four sub-distribution power P of lithium battery moduleLi4For:
Four sub-distribution power P of super capacitor moduleSC4For:
P in formulaLimax-c、PLimax-dFor lithium battery module charge-discharge electric power bound, PSCmax-c、PSCmax-dFor super capacitor Module charge-discharge electric power bound.
Solar air power-driven light boat hybrid accumulator energy manager of the present invention, by the way that hybrid accumulator energy is arranged Manager undertakes high frequency section power by ultracapacitor and mends by network load power swing by sub-distribution at the beginning of time-frequency conversion Instruction is repaid, the instruction of low frequency part power back-off is shared by lithium battery, filtering time is adjusted according to the SOC value of ultracapacitor in real time Constant coordinates control and maximum power limitation protection, eventually by control DC/DC two-way changings in conjunction with energy storage device super-charge super-discharge Device optimizes the charge and discharge process of whole system, completes the power distribution between lithium battery and ultracapacitor.Meeting solar energy sky Aerodynamic force ship electric propulsion system on the Demand Base of energy storage device, ensureing the normally and efficiently operation of each energy storage device, with Meet the application demand of solar air power-driven light boat electric propulsion system.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description, And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.

Claims (7)

1. a kind of solar air power-driven light boat hybrid accumulator energy manager, which is characterized in that wrapped in hybrid accumulator Lithium battery module, super capacitor module are included, lithium battery module, super capacitor module pass through its corresponding lithium battery DC/DC respectively Reversible transducer, super capacitor DC/DC reversible transducers are connected in parallel to DC bus, and four levels of linkages formula energy manager receives lithium electricity Pond module, the voltage of super capacitor module, electric current calculate the power and state-of-charge of the two, lithium battery DC/DC two-way changings Device, super capacitor DC/DC reversible transducers receive the control signal of four levels of linkages formula energy manager, four levels of linkages formula energy respectively Amount manager is allowed to match with the compensation power of DC bus requirement for controlling hybrid accumulator output power.
2. solar air power-driven light boat hybrid accumulator energy manager according to claim 1, which is characterized in that four Grade coordinated type energy manager is according to DC bus power swing combination lithium battery module, super capacitor module power and charged shape State, by sub-distribution, the compensation power reallocation based on ultracapacitor SOC, mistake at the beginning of the compensation power based on high low-pass filtering The level Four power distribution put and coordinate control, instantaneous maximum charge-discharge electric power limitation was filled, lithium battery module and super capacitor are obtained The control signal of module.
3. solar air power-driven light boat hybrid accumulator energy manager according to claim 2, which is characterized in that institute It states by sub-distribution at the beginning of the compensation power based on high low-pass filtering, specially lithium battery module and super capacitor module power divides in advance Match;The compensation power based on ultracapacitor SOC value is reallocated, and is specially ensureing that hybrid accumulator power is constant Under the premise of, time constant filter is adjusted according to super capacitor module state-of-charge and carries out second of power on the basis of predistribution Distribution;Super-charge super-discharge coordinates control, specially according to the limitation of lithium battery module state-of-charge and super capacitor module state-of-charge The power of the second sub-distribution of constraint pair of limitation carries out third sub-distribution;Instantaneous maximum charge-discharge electric power limitation, specially basis Power of the constraint of lithium battery module maximum charge-discharge electric power and super capacitor module maximum charge-discharge electric power to third sub-distribution Carry out the 4th sub-distribution.
4. solar air power-driven light boat hybrid accumulator energy manager according to claim 3, which is characterized in that base After sub-distribution at the beginning of compensation power in high low-pass filtering, the first distribution power P of lithium batteryLi1For:
The first distribution power P of super capacitorSC1For:
In formula:S is Laplace transformation complex variable, tsFor low-pass filtering time constant, according to the frequency for the power that lithium battery needs to compensate It chooses, PHESEPower is compensated for hybrid accumulator.
5. solar air power-driven light boat hybrid accumulator energy manager according to claim 3, which is characterized in that base After the compensation power redistribution process of ultracapacitor SOC, lithium battery module secondary distribution power PLi2For:
Super capacitor module secondary distribution power PSC2For:
In formula:Δ T is low-pass filtering time constant adjusted value.
6. solar air power-driven light boat hybrid accumulator energy manager according to claim 3, which is characterized in that mistake It filled after putting and coordinating control process, lithium battery module distribution power P three timesLi3For:
SOC in formulamax、SOChigh、SOClow、SOCmin、SOCLiThe respectively limit value of forbidding charging of lithium battery module, electric discharge warning Limit value, forbids charge limit value, real-time state-of-charge at charging warning limitation;
Super capacitor module distribution power P three timesSC3For:
SOC` in formulamax、SOC`high、SOC`low、SOC`min、SOCSCRespectively super capacitor module forbids charge limit value, electric discharge Warning limit value, forbids charge limit value, real-time state-of-charge at charging warning limitation.
7. solar air power-driven light boat hybrid accumulator energy manager according to claim 3, which is characterized in that wink When maximum charge-discharge electric power limit procedure after, four sub-distribution power P of lithium battery moduleLi4For:
Four sub-distribution power P of super capacitor moduleSC4For:
Wherein,For lithium battery module charge-discharge electric power bound,For super electricity Molar group charge-discharge electric power bound.
CN201810387220.2A 2018-04-26 2018-04-26 Solar air power-driven light boat hybrid accumulator energy manager Pending CN108539774A (en)

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Citations (2)

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Publication number Priority date Publication date Assignee Title
CN103701144A (en) * 2013-12-11 2014-04-02 清华大学 Power distribution method for hybrid energy storage system
CN107222013A (en) * 2017-07-03 2017-09-29 太原理工大学 Independent photovoltaic mixed energy storage system energy control method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103701144A (en) * 2013-12-11 2014-04-02 清华大学 Power distribution method for hybrid energy storage system
CN107222013A (en) * 2017-07-03 2017-09-29 太原理工大学 Independent photovoltaic mixed energy storage system energy control method

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