CN105449823B - Photovoltaic charging system and its operation method and device - Google Patents
Photovoltaic charging system and its operation method and device Download PDFInfo
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- CN105449823B CN105449823B CN201510972069.5A CN201510972069A CN105449823B CN 105449823 B CN105449823 B CN 105449823B CN 201510972069 A CN201510972069 A CN 201510972069A CN 105449823 B CN105449823 B CN 105449823B
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- charging
- energy
- photovoltaic
- converter
- storage battery
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
-
- 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
Abstract
The present invention provides photovoltaic charging system comprising photovoltaic substrate, energy-storage battery and the charging port for external electric vehicle charging end, and have charging connection relationship as follows：Charging connection A. photovoltaic substrate is connected to energy-storage battery through DC-DC transformation, and charging connection B. energy-storage battery is connected to charging port through DC-DC transformation, and charging connection C. photovoltaic substrate is connected to charging port through DC-DC transformation.Photovoltaic charging system charging conversion process is simple, high-efficient.The photovoltaic charging system preferably, by two DC-DC converters realizes charging connection A side by side.The present invention gives the operation method of the preferred photovoltaic charging system；Step in the operation method, can establish functional module, be combined into functional module construction, mainly be realized by storing computer program in a computer-readable storage medium.
Description
Technical field
The present invention relates to a kind of photovoltaic charging system and its operation method, step in the operation method can establish function
Energy module, is combined into functional module construction, mainly by storing computer program in a computer-readable storage medium come real
It is existing.
Background technique
With the aggravation of energy crisis and the enhancing of environmental consciousness, electric vehicle obtains extensive development and uses.It is electronic
The charging of vehicle needs charging station.To make full use of the energy, the sunshade above current charging station is usually laid with photovoltaic substrate.
The DC inverter that photovoltaic substrate generates is transported on power grid at alternating current using gird-connected inverter at present.Charging
Stand need to by convert alternating current be direct current export again, from photovoltaic substrate to charging station export process be equivalent to have passed through direct current to
Exchange, and by the multi-stage transformation of AC-to DC, this keeps whole system efficiency lower.
Summary of the invention
Object of the present invention is to simplify the charging conversion process of photovoltaic charging system, improve efficiency.
The present invention provides a kind of photovoltaic charging system referring to Figure 1, including photovoltaic substrate, energy-storage battery and is used for external electricity
The charging port of motor-car charging end, and have charging connection relationship as follows：
Charging connection A. photovoltaic substrate is connected to energy-storage battery through DC-DC transformation,
Charging connection B. energy-storage battery is connected to charging port through DC-DC transformation,
Charging connection C. photovoltaic substrate is connected to charging port through DC-DC transformation.
The electric energy that the photovoltaic substrate of the photovoltaic charging system generates can directly charge for electric vehicle, can also store
In energy-storage battery, the electric energy in energy-storage battery may be electric vehicle charging, without using alternating current, simplify transformed
Journey improves efficiency.
Photovoltaic charging system provided by the invention specifically refers to Fig. 2, has the first DC-DC transformation for capableing of two-way changing
Device 1, first flanks energy-storage battery, and second side is allowed hand over to photovoltaic substrate to realize charging connection A and switch to charging end
Mouth is to realize charging connection B.Since charging connection A, B will not carry out simultaneously, which just uses one pair
Charging connection A, B is realized to converter, can save a converter.
The present invention provides another specific photovoltaic charging system and refers to Fig. 3, has the first DC-DC converter and second
DC-DC converter 2, it is specific as follows：
First DC-DC converter realizes charging connection A；
The input of second DC-DC converter 2 flanks photovoltaic substrate, and outlet side is allowed hand over to energy-storage battery to realize that charging connects
It meets A and switches to charging port to realize charging connection C, so that the first, second DC-DC converter can be realized side by side
Charging connection A.The operation method of the photovoltaic charging system is as follows：When need to only allow photovoltaic substrate give energy-storage battery charging, electric vehicle
When without charging, if only operation one is not enough to bear the electric energy of photovoltaic substrate offer in the first, second DC-DC converter,
It thens follow the steps A1. and realizes charging connection A together with the first, second DC-DC converter, so that photovoltaic substrate be allowed to pass through the two
DC-DC converter charges to energy-storage battery together；When need to only allow photovoltaic substrate to charge to energy-storage battery, electric vehicle is without charging
When, it is enough to bear the electric energy that photovoltaic substrate provides if running any one in the first, second DC-DC converter, executes step
Rapid A2. synchronization only realizes charging connection A, specifically, the first, second DC-DC converter with one of DC-DC converter
Charging connection A is realized in turn, so that photovoltaic substrate be allowed to charge in turn to energy-storage battery by the two DC-DC converters.Charging
System can produce electricl energy the difference of size in response to photovoltaic substrate, make full use of the capacity of converter, neatly use converter,
Not only cost is saved, but also keeps device loss small.Step in the operation method, can establish functional module, be combined into functional module
Framework is mainly realized by storing computer program in a computer-readable storage medium.
Detailed description of the invention
Fig. 1 is the charging connection relation schematic diagram of photovoltaic charging system；
Fig. 2 is connection relationship diagram of first DC-DC converter 1 in photovoltaic charging system；
Fig. 3 is connection relationship diagram of second DC-DC converter 2 in photovoltaic charging system；
Fig. 4 is the connection relationship diagram of photovoltaic charging system；
Fig. 5 is that the connection of photovoltaic charging system mode 1 and energy flow to schematic diagram；
Fig. 6 is that the connection of photovoltaic charging system mode 2 and energy flow to schematic diagram；
Fig. 7 is that the connection of photovoltaic charging system Night and energy flow to schematic diagram.
Specific embodiment
Photovoltaic charging system is as shown in Figure 4：With the first DC-DC converter 1 for capableing of two-way changing, first flanks storage
Energy battery, second side are allowed hand over to photovoltaic substrate to realize charging connection A and switch to charging port to realize charging connection
B；With the second DC-DC converter 2, input flanks photovoltaic substrate, and outlet side is allowed hand over to energy-storage battery to realize charging
It connects A and switches to charging port to realize charging connection C.Specific connection is as shown in Fig. 5, Fig. 6 or Fig. 7, the first DC-DC
First side of converter 1 is connected to energy-storage battery, and second side of the first DC-DC converter 1 is connected to switch S1, S2 respective 2
Foot.Respective 3 foot of S1, S2 is connected to photovoltaic substrate, and respective 1 foot of S1, S2 is connected to charging port.Second DC-DC converter 2
Input terminal be connected to photovoltaic substrate, the output end of the second DC-DC converter 2 is connected to respective 2 foot of S3, S4.S3, S4 are respectively
3 feet be connected to energy-storage battery, respective 1 foot of S3, S4 is connected to charging port.S1, S2, S3 and S4 are controllable switch, respectively
1 foot or 3 feet can be switched to, to realize the conversion of connection relationship.Switch S1, S2, S3 and S4 can using relay, contactor,
Power tube etc..
On the daytime for having sunlight, when not having electric vehicle charging, mode 1 is carried out：Only photovoltaic substrate fills energy-storage battery
Electricity, commercial power charged equipment are in standby.Photovoltaic charging system shown in Fig. 4 switches to the state such as Fig. 5, switch S1, S2,
S3 and S4 is closed into 3 feet, and the first DC-DC converter 1 and the second DC-DC converter 2 realize charging connection A together.Photovoltaic substrate
It is charged together to energy-storage battery by the first DC-DC converter 1 and the second DC-DC converter 2, so that photovoltaic substrate is generated
Electric energy is stored into energy-storage battery.When design, the rated power of converter can be set by the half of the photovoltaic substrate power of access
Meter, if the power of the photovoltaic substrate of access is 6000W, each converter can be designed by the rated power of 3000W, without making
With the converter of 6000W, escapable cost.Benefit using two converters is the capacity that can make full use of converter.By
In photovoltaic substrate generate energy be it is continually changing, morning energy is smaller, and as sunlight enhances, energy is become larger, generally
Peak power output is reached to noon, is then reduced again with the decrease of sunlight, in the charging of no electric vehicle, when photovoltaic base
When the energy that plate generates is less than the half of its rated power, a converter is enough to bear the energy of photovoltaic substrate generation, can be with
It is charged in turn using one of the two converters for energy-storage battery, another standby rest works as photovoltaic to reduce loss
It the use of two converters is together that energy-storage battery charges when the energy that substrate generates is greater than the half of rated power.
When there is electric vehicle charging, mode 2 is carried out：Photovoltaic substrate, energy-storage battery, commercial power charged equipment are electric vehicle together
Charging, and the energy that photovoltaic substrate generates only is electric vehicle charging, is no longer energy-storage battery charging.See Fig. 4,6, switch S1, S2,
S3 and S4 is closed into 1 foot, and the second DC-DC converter 2 realizes charging connection C, and the first DC-DC converter 1 realizes charging connection B.
Photovoltaic substrate is electric vehicle charging by the second DC-DC converter 2, and energy-storage battery is electric vehicle by the first DC-DC converter 1
Charging, when the charging current deficiency of photovoltaic and energy-storage battery, commercial power charged equipment, which is added, to charge together for electric vehicle.When there is electricity
When motor-car charges, the energy that photovoltaic substrate generates can only be transported on electric vehicle by the second DC-DC converter 2, at this time photovoltaic
The energy that substrate generates may be more than the rated power of the second DC-DC converter 2 when sunlight is fierce at noon, but due to transformation
Device has certain overload capacity, the energy that photovoltaic substrate generates can be still transported on electric vehicle, quick charge generally exists
It is completed in 30 minutes, within this time, device temperature will not also rise to protection value.In addition, S1, S2 can when sunlight is fierce
3 feet are switched to respectively, so that the first DC-DC converter 1 realizes charging connection A, the second DC-DC converter 2 realizes charging connection
C makes photovoltaic substrate while being electric vehicle and energy-storage battery charging.
In electricity price low ebb period, usually the time-division at midnight, photovoltaic substrate is without power output（Night）.See Fig. 4,7, opens
It closes S1, S2, S3, S4 and is closed into 1 foot, the second DC-DC converter 2 is in shutdown status, and the first DC-DC converter 1 realizes charging
B (but with contrary shown in Fig. 4) is connected, commercial power charged equipment is filled by the first DC-DC converter 1 for energy-storage battery
Electricity.If need to charge at this time to electric vehicle, commercial power charged equipment is preferably electric vehicle charging.In electricity price rush hour, such as morning,
The energy also very little that photovoltaic substrate generates at this time preferentially uses the electric energy in energy-storage battery for electric vehicle charging, so on the one hand
Electricity price cost is reduced, on the other hand sufficiently discharges the energy in energy-storage battery, the electric energy generated for storage photovoltaic substrate is done
Prepare.
When grid power blackout, photovoltaic charging system of the invention can pass through the electricity of photovoltaic substrate and energy-storage battery offer
Can, continue as electric vehicle charging.
Second DC-DC converter 2 can use non-isolated topology, can also use isolated topology.If the first DC-DC is converted
The output common ground of device 1, the second DC-DC converter 2 and commercial power charged equipment can cancel switch S2 and S4.
The step in method provided for the present invention, can establish functional module, is combined into functional module construction, mainly
It is realized by storing computer program in a computer-readable storage medium.
Claims (7)
1. photovoltaic charging system, including photovoltaic substrate, energy-storage battery and charging port for external electric vehicle charging end, and have
There is charging connection relationship as follows：
Charging connection A. photovoltaic substrate is connected to energy-storage battery through DC-DC transformation,
Charging connection B. energy-storage battery is connected to charging port through DC-DC transformation,
Charging connection C. photovoltaic substrate is connected to charging port through DC-DC transformation,
It is characterized in that：It is specific as follows with the first DC-DC converter and the second DC-DC converter：
First DC-DC converter realizes charging connection A；
The input of second DC-DC converter flanks photovoltaic substrate, outlet side allow hand over to energy-storage battery with realize charging connection A and
Charging port is switched to realize charging connection C, so that the first, second DC-DC converter can realize charging side by side
Connect A.
2. photovoltaic charging system according to claim 1, the first DC-DC converter can two-way changing, first flanks
Energy-storage battery, second side are allowed hand over to photovoltaic substrate to realize charging connection A and switch to charging port to realize that charging connects
Meet B.
3. photovoltaic charging system according to claim 1 or 2 further includes charging pile, input side is connected to public electric wire net,
Outlet side is connected to charging port.
4. the operation method of photovoltaic charging system of any of claims 1 or 2, it is characterized in that：
When need to only allow photovoltaic substrate to charge to energy-storage battery, when electric vehicle is not necessarily to charge, if the first, second DC-DC converter is worked as
In only operation one be not enough to bear photovoltaic substrate offer electric energy, then follow the steps A1. with the first, second DC-DC converter
Charging connection A is realized together, so that photovoltaic substrate be allowed to charge together to energy-storage battery by the two DC-DC converters；
When need to only allow photovoltaic substrate to charge to energy-storage battery, when electric vehicle is not necessarily to charge, if the first, second DC-DC converter is worked as
Any one is enough to bear the electric energy that photovoltaic substrate provides for middle operation, thens follow the steps A2. synchronization and only uses one of DC-
DC converter realizes charging connection A.
5. operation method according to claim 4, in step A2, the first, second DC-DC converter realizes that charging connects in turn
A is met, so that photovoltaic substrate be allowed to charge in turn to energy-storage battery by the two DC-DC converters.
6. the running gear of photovoltaic charging system of any of claims 1 or 2, it is characterized in that including：
Double A charging modules, for when need to only allow photovoltaic substrate to give energy-storage battery charging, electric vehicle without when charging, if first, the
Only operation one is not enough to bear the electric energy of photovoltaic substrate offer in two DC-DC converters, then follow the steps A1. with first,
Second DC-DC converter realizes charging connection A together, to allow photovoltaic substrate by the two DC-DC converters together to storage
It can battery charging；
Single A charging module, when need to only allow photovoltaic substrate give energy-storage battery charging, electric vehicle without charge when, if first, second
Any one is run in DC-DC converter to be enough to bear the electric energy that photovoltaic substrate provides, and thens follow the steps A2. synchronization only
Charging connection A is realized with one of DC-DC converter.
7. running gear according to claim 6, single A charging module is in step A2, the first, second DC-DC
Converter realizes charging connection A in turn, so that photovoltaic substrate be allowed to fill in turn to energy-storage battery by the two DC-DC converters
Electricity.
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| CN201510972069.5A CN105449823B (en) | 2015-12-22 | 2015-12-22 | Photovoltaic charging system and its operation method and device |
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| CN107517001A (en) * | 2017-09-20 | 2017-12-26 | 重庆聚陆新能源有限公司 | A kind of DC/DC converters of restructural |
| CN107979160A (en) * | 2017-12-27 | 2018-05-01 | 广东产品质量监督检验研究院 | A kind of photovoltaic energy storage type DC charging column and charging method |
| CN114243872A (en) * | 2021-11-08 | 2022-03-25 | 深圳供电局有限公司 | Fill electric pile DC power supply unit and battery charging outfit |
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| CN202004689U (en) * | 2011-03-29 | 2011-10-05 | 深圳茂硕电源科技股份有限公司 | Solar intelligent comprehensive utilization structure |
| CN102222954A (en) * | 2011-06-16 | 2011-10-19 | 上海雷博新能源汽车技术有限公司 | Parallel-type high-power charging device |
| CN104967112A (en) * | 2015-06-26 | 2015-10-07 | 上海电力学院 | Direct current micro-grid coordination control method of light storage electric car charging station |
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| CN103249203A (en) * | 2012-02-06 | 2013-08-14 | 上海岩芯电子科技有限公司 | LED constant current drive and photovoltaic module MPPT integrally controlled street lamp system |
| CN203120214U (en) * | 2012-11-30 | 2013-08-07 | 苏州市职业大学 | Control and driving integration apparatus used for solar energy LED illumination |
| JP6190299B2 (en) * | 2014-03-27 | 2017-08-30 | シャープ株式会社 | Power control apparatus, photovoltaic power generation system, and power control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202004689U (en) * | 2011-03-29 | 2011-10-05 | 深圳茂硕电源科技股份有限公司 | Solar intelligent comprehensive utilization structure |
| CN102222954A (en) * | 2011-06-16 | 2011-10-19 | 上海雷博新能源汽车技术有限公司 | Parallel-type high-power charging device |
| CN104967112A (en) * | 2015-06-26 | 2015-10-07 | 上海电力学院 | Direct current micro-grid coordination control method of light storage electric car charging station |
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