CN106208192B - A kind of microgrid type solar recharging stake and charging method - Google Patents
A kind of microgrid type solar recharging stake and charging method Download PDFInfo
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- CN106208192B CN106208192B CN201610554009.6A CN201610554009A CN106208192B CN 106208192 B CN106208192 B CN 106208192B CN 201610554009 A CN201610554009 A CN 201610554009A CN 106208192 B CN106208192 B CN 106208192B
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- 238000000034 method Methods 0.000 title abstract description 12
- 238000001514 detection method Methods 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 11
- 238000011217 control strategy Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000003306 harvesting Methods 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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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
- H02J1/00—Circuit arrangements for DC mains or DC distribution networks
- H02J1/10—Parallel operation of DC sources
- H02J1/102—Parallel operation of DC sources being switching converters
-
- H02J3/385—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Control Of Electrical Variables (AREA)
Abstract
本发明涉及一种微网型太阳能充电桩及充电方法，充电桩包括太阳能电池板(101)、MPPT电路(102)、主控制单元(103)、接口逆变电路(105)、电网充电电路(107)、并网逆变电路(108)和微电网(109)，太阳能电池板(101)通过MPPT电路(102)向直流母线(110)供电，直流母线(110)通过接口逆变电路(105)连接至充电插口(106)，直流母线(110)还通过并网逆变电流(108)连接至微电网(109)，微电网(109)还通过电网充电电路(107)连接至直流母线(110)，主控制单元(103)分别与MPPT电路(102)、接口逆变电路(105)、电网充电电路(107)和并网逆变电路(108)信号连接。与现有技术相比，本发明具有能源管理结构简单、成本低且充电桩稳定性好的优点。
The invention relates to a micro-grid solar charging pile and a charging method. The charging pile includes a solar battery panel (101), an MPPT circuit (102), a main control unit (103), an interface inverter circuit (105), and a grid charging circuit ( 107), grid-connected inverter circuit (108) and microgrid (109), solar battery panel (101) supplies power to DC busbar (110) through MPPT circuit (102), and DC busbar (110) passes interface inverter circuit (105 ) is connected to the charging socket (106), the DC bus (110) is also connected to the microgrid (109) through the grid-connected inverter current (108), and the microgrid (109) is also connected to the DC bus ( 110), the main control unit (103) is respectively signal-connected with the MPPT circuit (102), the interface inverter circuit (105), the grid charging circuit (107) and the grid-connected inverter circuit (108). Compared with the prior art, the present invention has the advantages of simple energy management structure, low cost and good stability of the charging pile.
Description
Technical field
The present invention relates to a kind of charging piles, more particularly, to a kind of microgrid type solar recharging stake and charging method.
Background technique
New-energy electric vehicle is the inexorable trend of future automobile industry trend, and solving electric car charging problems can promote
Into new-energy automobile Rapid Popularization.As fuel-engined vehicle be unable to do without gas station, electric car also be unable to do without charging pile, using too
Sun can be also that direction is implemented in following charging pile design as the energy sources of charging pile, design a kind of microgrid type solar recharging
The comparison that stake is just shown is urgent.But influenced by solar energy generating efficiency is unstable, the sun can be encountered during the charging process
The problem of energy electricity shortage or solar powered surplus reasonably realizes electricity how in the case where ensureing output voltage stabilization
Scheduling between net and photovoltaic energy, it has also become the problem of solar recharging stake is paid the utmost attention to.
Patent 102355023B provides a kind of light storage formula electric car electric charging station, which passes through to solar energy
The detection of generated energy and accumulators store energy realizes the switching of the energy between solar energy, battery and power grid to reach
To load Charge Management and control.However this kind of structure causes system because battery is constantly in charging and discharging state
The service life of device short and at high cost problem.Meanwhile it is defeated to judge by detection solar panel and storage battery energy state
Energy relationship between entering and exporting, method is relative complex and feasibility is not high.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of control method is simple
And no storage battery declines net type solar recharging stake.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of microgrid type solar recharging stake, including solar panel, MPPT circuit, main control unit, interface inversion
Circuit, grid charging circuit, grid-connected inverter circuit and micro-capacitance sensor, the solar panel are female to direct current by MPPT circuit
Line power supply, the DC bus are connected to charging jack by interface inverter circuit, and DC bus also passes through parallel network reverse electricity
Road is connected to micro-capacitance sensor, and micro-capacitance sensor also passes through grid charging circuit connection to DC bus, the main control unit respectively with
MPPT circuit, interface inverter circuit, grid charging circuit are connected with grid-connected inverter circuit signal, after charging pile circuit is connected,
The collected energy stream of solar panel is transmitted on DC bus by MPPT circuit incessantly, is charged for battery and grid-connected
It uses.
The charging pile further includes LCD display and setting unit, and the LCD display and setting unit pass through
485 buses are connect with main control unit, and the working condition of charging pile is real-time transmitted to LCD display and setting by main control unit
Unit carries out the Dynamically Announce of charging pile job information, when the charging of charging pile is arranged in the LCD display and setting unit
Between.
The solar panel and MPPT circuit is one-to-one multiple groups structure.
A method of it is charged using the microgrid type solar recharging stake, the interface inverter circuit receives
Energy stream on DC bus carries out inversion and handles to obtain alternating current, then exports to charging jack, and the charging for electric car makes
With.
MPPT circuit, interface inverter circuit, grid charging circuit and the grid-connected inverter circuit passes through 485 buses respectively
It is communicated with main control unit, MPPT circuit sends the voltage and current parameter of solar panel to main control unit, interface
Inverter circuit carries out tracing detection to the remaining capacity of the load in charging jack, and detection information is returned to main control unit.
The main control unit realizes that the energy between solar energy and power grid is cut by multistage DC bus control strategy
Change and manage, specifically include: detection DC bus-bar voltage Udc simultaneously makes comparisons with control reference voltage UH, UM and UL of setting,
Middle UH, UM and UL are sequentially reduced,
As Udc >=UH, the energy of solar panel conversion is greater than charge requirement, grid-connected inverter circuit closure, direct current
The energy stream of surplus is injected power grid by bus；
As UM < Udc < UH, the energy of solar panel does not need micro- electricity in the range of meeting charge requirement
Net supplementary power, grid charging circuit disconnect；
As UL < Udc≤UM, the energy of solar panel is completely used for charging, and grid-connected inverter circuit disconnects, and stops
Grid-connected conversion；
As Udc≤UL, the energy of input direct-current bus is less than output rechargeable energy, and grid charging closing of circuit is insufficient
Energy provides supplement by grid charging circuit.
The MPPT circuit includes P adjuster, pi regulator and DC-DC converter, utilizes photovoltaic Current Control Strategy
The energy harvesting for realizing solar panel, specifically includes:
1) DC bus-bar voltage Udc is sampled, using deviation △ Udc as the input signal of P adjuster, △ Udc=
Udc_T-Udc, Udc_T are the DC bus-bar voltage upper limit of setting；
2) deviation △ Udc passes through P regulator output signal △ Ipv=K* △ Udc, wherein as △ Udc > 0, K=0；
As △ Udc < 0, K is the constant greater than 0；
3) the voltage Upv of solar panel and electric current Ipv is sampled, current solar battery is obtained by MPPT algorithm
The maximum power electric current Ipv_mpp of plate；
4) the input value Ipv_ref=Ipv_mpp+ △ Ipv-Ipv of pi regulator is enabled, output valve is DC-DC converter
Duty ratio D, for adjusting DC-DC converter, DC-DC converter output is connected to DC bus, reaches control solar battery
The purpose of plate output electric current Ipv.
Compared with prior art, the invention has the following advantages that
(1) after charging pile circuit is connected, MPPT circuit transmits the collected energy stream of solar panel incessantly
Onto DC bus, for load and grid-connected use, under the premise of ensureing that electric car charges normal, to greatest extent using too
Sun can generate electricity, and improve the utilization rate of solar energy.
(2) LCD display and setting unit can carry out the Dynamically Announce of charging pile job information, the charging of charging pile are arranged
Time.
(3) solar energy generating efficiency is high, because multiple groups solar panel may be implemented simultaneously using photovoltaic Current Control Strategy
Connection mode is input at DC bus, improves the generating efficiency of every group of solar panel.
(4) MPPT circuit sends the voltage and current parameter of solar panel to main control unit, interface inversion electricity
Road carries out tracing detection to the remaining capacity of the load in charging jack, and detection information is returned to main control unit, is conducive to real
Existing micro-capacitance sensor and solar energy intelligent scheduling and switching.
(5) energy management structure is simple, and the voltage by judging DC bus is only needed because of multistage DC bus control strategy
Grade is it may determine that the energy-balancing relationship between current solar energy, power grid and load, the practical operation that is more suitable use out.
(6) MPPT circuit exports electric current Ipv by control solar panel, realizes the tracking tune of DC bus-bar voltage
Section.
(7) system uses no storage battery structure, is greatly reduced the cost of device, improves the service life of system.
Detailed description of the invention
Fig. 1 is system and structural block diagram of the invention；
Fig. 2 is microgrid type solar recharging stake main control flow chart of the present invention；
Fig. 3 is a kind of photovoltaic current mode control strategy flow chart provided by the invention；
Fig. 4 is using multiple groups solar panel and MPPT circuit structure diagram.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to
Following embodiments.
Embodiment
As shown in Figure 1, a kind of microgrid type solar recharging stake, including solar panel 101, MPPT circuit 102, master control
Unit 103, interface inverter circuit 105, grid charging circuit 107, grid-connected inverter circuit 108 and micro-capacitance sensor 109 processed, solar-electricity
Pond plate 101 is powered by MPPT circuit 102 to DC bus 110, and DC bus 110 is connected to by interface inverter circuit 105
Charging jack 106, DC bus 110 are also connected to micro-capacitance sensor 109 by grid-connected inverter circuit 108, and micro-capacitance sensor 109 also passes through electricity
Net charging circuit 107 is connected to DC bus 110, main control unit 103 respectively with MPPT circuit 102, interface inverter circuit
105, grid charging circuit 107 is connected with 108 signal of grid-connected inverter circuit, and after charging pile circuit is connected, MPPT circuit 102 will
The collected energy stream of solar panel 101 is transmitted to incessantly on DC bus 110, is made for battery charging with grid-connected
With.
Charging pile further includes LCD display and setting unit 104, and LCD display and setting unit 104 pass through 485 buses
It is connect with main control unit 103, the working condition of charging pile is real-time transmitted to LCD display and setting by main control unit 103
Unit 104 carries out the Dynamically Announce of charging pile job information, when the charging of charging pile is arranged in LCD display and setting unit 104
Between.
Solar panel 101 and MPPT circuit 102 are one-to-one multiple groups structure.
A method of it is charged using microgrid type solar recharging stake, interface inverter circuit 105 receives DC bus
Energy stream on 110 carries out inversion and handles to obtain alternating current, then the charging exported to charging jack 106, for electric car makes
With.
MPPT circuit 102, interface inverter circuit 105, grid charging circuit 107 and grid-connected inverter circuit 108 pass through respectively
485 buses are communicated with main control unit 103, and MPPT circuit 102 sends the voltage and current parameter of solar panel 101 to
Main control unit 103, interface inverter circuit 106 carries out tracing detection to the remaining capacity of the load in charging jack 106, inspection
Measurement information returns to main control unit 103.
In Fig. 1, thin arrow indicates that signal stream, hollow arrow indicate energy stream.
Main control unit 103 pass through multistage DC bus control strategy realize energy switching between solar energy and power grid with
Management, specifically includes: detection 110 voltage Udc of DC bus simultaneously makes comparisons with control reference voltage UH, UM and UL of setting,
Middle UH, UM and UL are sequentially reduced,
As Udc >=UH, the energy of input direct-current bus 110 is greater than output rechargeable energy, and grid-connected inverter circuit 108 closes
It closes, the energy injection micro-capacitance sensor 109 that DC bus 110 is extra of grid-connected inverter circuit 108；
As UM < Udc < UH, energy and the output rechargeable energy of input direct-current bus 110 are mutually balanced, parallel network reverse
Circuit 108 keeps closed state, and grid charging circuit 107 disconnects；
As UL < Udc≤UM, the energy of solar panel is completely used for charging, and grid-connected inverter circuit 108 disconnects, and stops
Only grid-connected conversion；
As Udc≤UL, 110 energy of input direct-current bus are less than output rechargeable energy, and grid-connected inverter circuit 108 is disconnected
It opens, grid charging circuit 107 is closed, and insufficient energy provides supplement by grid charging circuit.
As shown in Fig. 2, control flow includes:
After charging pile circuit is connected, the charging time is arranged by using LCD display and setting unit 104, and lead in S1
Cross the output current information that interface inverter circuit 106 detects；
S2, main control unit 103 judge whether charging pile is charging.If the output electric current detected is zero, conclude
System is not charging, and grid-connected inverter circuit 108 is closed, and the energy that solar panel 101 converts is used for grid-connected use；
If the output electric current detected is not zero, 110 real-time voltage Udc of DC bus and UH relationship are judged: when Udc is greater than UH,
The energy that solar panel 101 converts at this time is greater than charge requirement, and grid-connected inverter circuit 108 is closed, and DC bus 110 will be full of
Remaining energy stream injects grid-connected inverter circuit 108, is used for grid-connected use；When Udc is less than UH, then judge that Udc and UM is closed
System, if Udc is greater than UM, the energy of solar panel 101 does not need micro-capacitance sensor in the range of meeting charge requirement at this time
109 supplementary powers, grid charging circuit 107 disconnect；If Udc is less than UM, the energy of solar panel 101 is completely used at this time
Charging, grid-connected inverter circuit 108 disconnect, and stop grid-connected conversion.Then Udc and UL relationship are judged, if Udc is greater than UL, at this time too
The energy of positive energy solar panel 101 is supplied to charging jack 106 after the processing of interface inverter circuit 106；If Udc is less than UL, this
When, 101 energy electricity shortage of solar panel, it is impossible to meet the demand of power supply, grid charging circuit 107 is closed, micro-capacitance sensor
109 supplementary powers guarantee that direct current bus bar pressure is stablized, and so that interface inverter circuit 105 is able to carry out normal inversion processing, make
Load can charge normal.
Fig. 3 is a kind of photovoltaic Current Control Strategy flow chart that MPPT circuit 102 uses, and MPPT circuit 102 is adjusted including P
Device, pi regulator and DC-DC converter realize the energy harvesting of solar panel 101, tool using photovoltaic Current Control Strategy
Body includes:
1) 110 voltage Udc of DC bus is sampled, using deviation △ Udc as the input signal of P adjuster, △ Udc=
Udc_T-Udc, Udc_T are 110 upper voltage limit of DC bus of setting；
2) deviation △ Udc passes through P regulator output signal △ Ipv=K* △ Udc, wherein as △ Udc > 0, K=0；
As △ Udc < 0, K is the constant greater than 0；
3) the voltage Upv of solar panel 101 and electric current Ipv is sampled, current solar energy is obtained by MPPT algorithm
The maximum power electric current Ipv_mpp of solar panel 101；
4) the input value Ipv_ref=Ipv_mpp+ △ Ipv-Ipv of pi regulator is enabled, output valve is DC-DC converter
Duty ratio D, for adjusting DC-DC converter, D=P1*Ipv_ref+P2* ∑ Ipv_ref, wherein P1 is the ratio of pi regulator
Coefficient, P2 are integral coefficient, and DC-DC converter output is connected to DC bus 110, reach control solar panel output electricity
Flow the purpose of Ipv.DC-DC conversion circuit preferentially selects Boost circuit structure.
Fig. 4 be it is a kind of use multiple groups solar panel and MPPT circuit structure diagram, including multiple groups solar panel and
MPPT circuit, and every group of solar panel has MPPT circuit all the way, as solar panel 201,202,203 respectively corresponds
MPPT circuit 301,302,303, all MPPT circuit output ends are connected at DC bus, the structure and single group solar-electricity
Pond plate is compared, reliability with higher.
Claims (5)
1. a kind of microgrid type solar recharging stake, which is characterized in that including solar panel (101), MPPT circuit (102),
Main control unit (103), interface inverter circuit (105), grid charging circuit (107), grid-connected inverter circuit (108) and micro-capacitance sensor
(109), the solar panel (101) is powered by MPPT circuit (102) to DC bus (110), the direct current
Bus (110) is connected to charging jack (106) by interface inverter circuit (105), and DC bus (110) also passes through parallel network reverse
Circuit (108) is connected to micro-capacitance sensor (109), and micro-capacitance sensor (109) is also connected to DC bus by grid charging circuit (107)
(110), the main control unit (103) respectively with MPPT circuit (102), interface inverter circuit (105), grid charging circuit
(107) it is connected with grid-connected inverter circuit (108) signal, after charging pile circuit is connected, MPPT circuit (102) is by solar battery
Plate (101) collected energy stream is transmitted to incessantly on DC bus (110), for battery charging and grid-connected use；
The interface inverter circuit (105) receives the energy stream on DC bus (110), and progress inversion, which is handled, to be exchanged
Electricity, then export to charging jack (106), the charging for electric car uses；
The MPPT circuit (102) includes P adjuster, pi regulator and DC-DC converter, utilizes photovoltaic Current Control Strategy
The energy harvesting for realizing solar panel (101), specifically includes:
1) DC bus (110) voltage Udc is sampled, using deviation △ Udc as the input signal of P adjuster, △ Udc=
Udc_T-Udc, Udc_T are DC bus (110) upper voltage limit of setting；
2) deviation △ Udc passes through P regulator output signal △ Ipv=K* △ Udc, wherein as △ Udc > 0, K=0；Work as △
When Udc < 0, K is the constant greater than 0；
3) the voltage Upv and electric current Ipv of solar panel (101) are sampled, current solar-electricity is obtained by MPPT algorithm
The maximum power electric current Ipv_mpp of pond plate (101)；
4) the input value Ipv_ref=Ipv_mpp+ △ Ipv-Ipv of pi regulator is enabled, output valve is the duty of DC-DC converter
Than D, for adjusting DC-DC converter, DC-DC converter output is connected to DC bus (110), reaches control solar battery
The purpose of plate output electric current Ipv.
2. a kind of microgrid type solar recharging stake according to claim 1, which is characterized in that the charging pile further includes
LCD display and setting unit (104), the LCD display and setting unit (104) pass through 485 buses and main control list
The working condition of charging pile is real-time transmitted to LCD display and setting unit by first (103) connection, main control unit (103)
(104), the Dynamically Announce of charging pile job information is carried out, charging pile is arranged in the LCD display and setting unit (104)
Charging time.
3. a kind of microgrid type solar recharging stake according to claim 1, which is characterized in that the solar panel
It (101) is one-to-one multiple groups structure with MPPT circuit (102).
4. a kind of microgrid type solar recharging stake according to claim 1, which is characterized in that the MPPT circuit
(102), interface inverter circuit (105), grid charging circuit (107) and grid-connected inverter circuit (108) respectively by 485 buses with
Main control unit (103) communication, MPPT circuit (102) send the voltage and current parameter of solar panel (101) to master
Control unit (103), interface inverter circuit (106) carry out tracing detection to the remaining capacity of the load on charging jack (106),
Detection information is returned to main control unit (103).
5. a kind of microgrid type solar recharging stake according to claim 4, which is characterized in that the main control unit
(103) energy switching and management between solar energy and power grid are realized by multistage DC bus control strategy, specifically included: inspection
It surveys DC bus (110) voltage Udc simultaneously to make comparisons with control reference voltage UH, UM and UL of setting, wherein UH, UM and UL be successively
Reduce,
As Udc >=UH, the energy stream of surplus is injected power grid, electricity by grid-connected inverter circuit (108) closure, DC bus (110)
Net charging circuit (107) disconnects；
As UM < Udc < UH, grid charging circuit (107) is disconnected, grid-connected inverter circuit (108) closed；
As UL < Udc≤UM, the energy of solar panel (101) is completely used for charging, and grid-connected inverter circuit (108) is disconnected
It opens, stops grid-connected conversion；
As Udc≤UL, the energy of input direct-current bus (110) is less than output rechargeable energy, and grid charging circuit (107) closes
It closes, insufficient energy provides supplement by grid charging circuit (107).
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|---|---|---|---|
| CN201610554009.6A CN106208192B (en) | 2016-07-14 | 2016-07-14 | A kind of microgrid type solar recharging stake and charging method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610554009.6A CN106208192B (en) | 2016-07-14 | 2016-07-14 | A kind of microgrid type solar recharging stake and charging method |
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| CN106208192B true CN106208192B (en) | 2018-12-21 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013076956A1 (en) * | 2011-11-21 | 2013-05-30 | パナソニック株式会社 | Power supply system |
| CN205104903U (en) * | 2015-10-27 | 2016-03-23 | 中广核太阳能开发有限公司 | Non - contravariant type light stores up little electric wire netting of direct current system for modern architecture |
| CN105490372A (en) * | 2016-01-08 | 2016-04-13 | 辽宁北方节能股份有限公司 | Solar alternating current charging pile capable of automatically switching power supplies |
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-
2016
- 2016-07-14 CN CN201610554009.6A patent/CN106208192B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013076956A1 (en) * | 2011-11-21 | 2013-05-30 | パナソニック株式会社 | Power supply system |
| CN205104903U (en) * | 2015-10-27 | 2016-03-23 | 中广核太阳能开发有限公司 | Non - contravariant type light stores up little electric wire netting of direct current system for modern architecture |
| CN105490372A (en) * | 2016-01-08 | 2016-04-13 | 辽宁北方节能股份有限公司 | Solar alternating current charging pile capable of automatically switching power supplies |
| CN105490348A (en) * | 2016-01-18 | 2016-04-13 | 国家电网公司 | Electric vehicle charging/discharging system based on photovoltaic array and energy storage unit |
Non-Patent Citations (1)
| Title |
|---|
| 独立光伏发电系统的MPPT及并网控制研究;刘飞;《中国优秀收拾论文学位论文数据库》;20140715;第18页-第19页 * |
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| CN106208192A (en) | 2016-12-07 |
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