CN203057015U - Photovoltaic inverter system - Google Patents

Photovoltaic inverter system Download PDF

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Publication number
CN203057015U
CN203057015U CN 201320062658 CN201320062658U CN203057015U CN 203057015 U CN203057015 U CN 203057015U CN 201320062658 CN201320062658 CN 201320062658 CN 201320062658 U CN201320062658 U CN 201320062658U CN 203057015 U CN203057015 U CN 203057015U
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CN
China
Prior art keywords
photovoltaic
inverter
output
net
cell assembly
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Expired - Lifetime
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CN 201320062658
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Chinese (zh)
Inventor
翟寿缙
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Canadian Solar Inc
Canadian Solar Manufacturing Changshu Inc
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Canadian Solar Manufacturing Changshu Inc
Canadian Solar China Investment Co Ltd
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Priority to CN 201320062658 priority Critical patent/CN203057015U/en
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Publication of CN203057015U publication Critical patent/CN203057015U/en
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    • 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

Abstract

The utility model provides a photovoltaic inverter system, comprising an MPPT (Maximum Power Point Tracking) charging control unit connected with a photovoltaic battery assembly, a storage battery assembly connected to an output end of the MPPT charging control unit, an inverter connected to an output end of the storage battery assembly, and an off-grid/grid-connected selection switch arranged at an output end of the inverter; wherein the inverter comprises a boost circuit unit connected with the storage battery assembly and an inversion circuit unit connected between the boost circuit unit and the off-grid/grid-connected selection switch.

Description

The photovoltaic DC-to-AC converter system
Technical field
The utility model relates to the photovoltaic power generation technology field, relates in particular to a kind of photovoltaic DC-to-AC converter system for photovoltaic generation.
Background technology
Solar energy also is one of novel energy that the putative mankind can be inexhaustible as the important component part of new forms of energy.Existing photovoltaic DC-to-AC converter system mainly contains grid type and from net type inverter system.Wherein the grid type inverter system mainly is made up of the combining inverter that connects photovoltaic cell component and public power distribution network etc.; Wherein solar energy converts direct current energy to by photovoltaic cell component, by combining inverter direct current energy is converted to AC energy again.From net type inverter system by the MPPT(Maximum Power Point Tracking that connects photovoltaic cell component, maximum power point tracking) charger, batteries and from compositions such as net inverters; Wherein photovoltaic cell component with the solar energy that receives be converted to direct current energy, control by the MPPT charging control unit realizes MPPT maximum power point tracking, then with the output electrical power storage of photovoltaic cell component in batteries, batteries is transformed to alternating current and supplies with AC load by inverter.But for the grid type inverter system, when distribution network failure, for preventing island effect, combining inverter will not be allowed to work, and the convertible electric energy of photovoltaic cell component is not utilized yet; And for from net type inverter system, when batteries has been filled electricity, and electric loading of no use, this moment, photovoltaic cell component was not because there is output loading to generate electricity.
At the deficiency of above-mentioned single inverter system, be necessary to provide a kind of improved photovoltaic DC-to-AC converter system to address the above problem.
The utility model content
The purpose of this utility model is to provide a kind of can be applicable to be incorporated into the power networks and the photovoltaic DC-to-AC converter system under the net various modes.
For realizing above-mentioned utility model purpose, the utility model provides a kind of photovoltaic DC-to-AC converter system, it comprises the MPPT charging control unit, the accumulator cell assembly that is connected described MPPT charging control unit output that connect a photovoltaic cell component, be connected the inverter of described accumulator cell assembly output and be arranged on described inverter output end from the net/selector switch that is incorporated into the power networks, described inverter comprises the booster circuit unit that connects described accumulator cell assembly and is connected described booster circuit unit and from net/the be incorporated into the power networks inverter circuit unit between the selector switch.
As further improvement of the utility model, described photovoltaic DC-to-AC converter system also comprises the reverse charging device between the output of the input that is connected described inverter circuit unit and accumulator cell assembly.
As further improvement of the utility model, described reverse charging device adopts circuit of reversed excitation unit or forward converter unit to form.
As further improvement of the utility model, described MPPT charging control unit adopts Boost booster circuit or Buck reduction voltage circuit or Boost-Buck two-way circuit to form.
As further improvement of the utility model, described inverter circuit unit adopts the normal shock full-bridge circuit to form.
As further improvement of the utility model, the output of described MPPT charging control unit is formed with the storage battery access interface that connects accumulator cell assembly.
As further improvement of the utility model, describedly be provided with the synchronization AC output port and from net ac output end mouth from the net/selector switch that is incorporated into the power networks.
The beneficial effects of the utility model are: the utility model photovoltaic DC-to-AC converter system can be operated in and be incorporated into the power networks, under two kinds of patterns of net, thereby can be applicable to that single component is integrated into that band is incorporated into the power networks and exchange assembly from what net used, is also applicable as small-power section energy-storage system.
Description of drawings
Fig. 1 is the structural representation of the utility model photovoltaic DC-to-AC converter system one preferred embodiment.
Specific embodiment
Be described in detail below with reference to the utility model of embodiment shown in the drawings.But these embodiment do not limit the utility model, and those of ordinary skill in the art all is included in the protection range of the present utility model according to structure or the conversion on the function that these embodiment make.
Please refer to a preferred embodiment that Figure 1 shows that the utility model photovoltaic DC-to-AC converter system.Described photovoltaic DC-to-AC converter system comprises the MPPT charging control unit 1, the accumulator cell assembly 2 that is connected described MPPT charging control unit 1 output that connect a photovoltaic cell component, be connected the inverter 3 of described accumulator cell assembly 2 outputs and be arranged on described inverter 3 outputs from net/selector switch 4 is incorporated into the power networks.The charging control unit of MPPT described in the utility model 1 can be carried out maximum power tracing to photovoltaic cell component when accumulators assembly 2 charges, thereby guarantees maximum power output.
Described inverter 3 has the invert function of boosting, and it comprises the booster circuit unit that connects described accumulator cell assembly 2 and is connected described booster circuit unit and from net/the be incorporated into the power networks inverter circuit unit between the selector switch 4.In addition, in conjunction with as can be known shown in Figure 1, the inverter circuit unit in the described inverter 3 is in order to carry out direct current to the conversion of alternating electromotive force, and it can be incorporated into the power networks and switch under two kinds of patterns of net, and adopts the normal shock full-bridge circuit to form.When described inverter 3 is operated in the pattern following time of being incorporated into the power networks, adopt the current-mode control pattern to guarantee maximum maximum power output by power grid control high direct voltage voltage; Be operated in from net pattern following time, adopt the voltage-type control model, the output of high direct voltage control voltage guarantees that high direct voltage voltage value is higher than the maximum that the output voltage demand exchanges.
Describedly be provided with the synchronization AC output port and from net ac output end mouth from the net/selector switch 4 that is incorporated into the power networks.Described synchronization AC output port is in order to connect utility grid; Described from net ac output end mouth in order to connect specified AC load.
In conjunction with as can be known shown in Figure 1, described photovoltaic DC-to-AC converter system also comprises the reverse charging device 5 between the output of the input that is connected described inverter circuit unit and accumulator cell assembly 2, this reverse charging device 5 can carry out Charge Management according to the state of accumulator cell assembly 2, generally under being not enough to replenish the situation of accumulator cell assembly 2 electric weight, photovoltaic cell component starts described reverse charging device 5, to charge by utility grid accumulators assembly 2, for emergent.In the utility model, described reverse charging device 5 can adopt circuit of reversed excitation unit or forward converter unit to form.
In conjunction with as can be known shown in Figure 1, in the present embodiment, described MPPT charging control unit 1 can adopt Boost booster circuit 11 or Buck reduction voltage circuit 12 to form; Certainly, described MPPT charging control unit 1 also can adopt Boost-Buck two-way circuit (not shown) to form.Simultaneously, in the present embodiment, the output of described MPPT charging control unit 1 is formed with the storage battery access interface 13 that connects accumulator cell assembly 2, makes user (not shown) to dispose different batteries to reach the purpose of energy storage according to load characteristic thus.
To sum up, the utility model photovoltaic DC-to-AC converter system can be operated under net and the two kinds of patterns that are incorporated into the power networks, wherein according to the detection of grid situation:
If be operated under the pattern of being incorporated into the power networks, the electric energy of photovoltaic cell component can be charged by MPPT charging control unit 1 accumulators assembly 2, simultaneously accumulator cell assembly 2 again by the booster circuit unit in the inverter 3 with accumulator cell assembly 2 boost in voltage to high voltage direct current, again by the inversion of inverter circuit unit, by utility grid control high direct voltage, guarantee the output of maximum power at last; Can utilize simultaneously described reverse charging device 5 to use for emergent by 2 chargings of utility grid accumulators assembly again;
If be operated under the net pattern, the electric energy of photovoltaic cell component can be charged by MPPT charging control unit 1 accumulators assembly 2, accumulator cell assembly 2 arrives accumulator cell assembly 2 boost in voltage about direct current 310V by the booster circuit unit in the inverter 3 again simultaneously, passes through inverter circuit unit inversion control output voltage again to supply with AC load.
Got by above, the utility model photovoltaic DC-to-AC converter system can be operated in and be incorporated into the power networks, under two kinds of patterns of net, thereby can be applicable to that single component is integrated into that band is incorporated into the power networks and exchange assembly from what net used, is also applicable as small-power section energy-storage system.
Above listed a series of detailed description only is specifying at feasibility embodiment of the present utility model; they are not in order to limiting protection range of the present utility model, allly do not break away from equivalent embodiment or the change that the utility model skill spirit does and all should be included within the protection range of the present utility model.

Claims (7)

1. photovoltaic DC-to-AC converter system, it is characterized in that: it comprises the MPPT charging control unit, the accumulator cell assembly that is connected described MPPT charging control unit output that connect a photovoltaic cell component, be connected the inverter of described accumulator cell assembly output and be arranged on described inverter output end from the net/selector switch that is incorporated into the power networks, described inverter comprises the booster circuit unit that connects described accumulator cell assembly and is connected described booster circuit unit and from net/the be incorporated into the power networks inverter circuit unit between the selector switch.
2. photovoltaic DC-to-AC converter according to claim 1 system is characterized in that: described photovoltaic DC-to-AC converter system also comprises the reverse charging device between the output of the input that is connected described inverter circuit unit and accumulator cell assembly.
3. photovoltaic DC-to-AC converter according to claim 2 system, it is characterized in that: described reverse charging device adopts circuit of reversed excitation unit or forward converter unit to form.
4. photovoltaic DC-to-AC converter according to claim 1 system, it is characterized in that: described MPPT charging control unit adopts Boost booster circuit or Buck reduction voltage circuit or Boost-Buck two-way circuit to form.
5. photovoltaic DC-to-AC converter according to claim 1 system, it is characterized in that: described inverter circuit unit adopts the normal shock full-bridge circuit to form.
6. photovoltaic DC-to-AC converter according to claim 1 system, it is characterized in that: the output of described MPPT charging control unit is formed with the storage battery access interface that connects accumulator cell assembly.
7. photovoltaic DC-to-AC converter according to claim 1 system is characterized in that: describedly be provided with the synchronization AC output port and from net ac output end mouth from the net/selector switch that is incorporated into the power networks.
CN 201320062658 2013-02-04 2013-02-04 Photovoltaic inverter system Expired - Lifetime CN203057015U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320062658 CN203057015U (en) 2013-02-04 2013-02-04 Photovoltaic inverter system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320062658 CN203057015U (en) 2013-02-04 2013-02-04 Photovoltaic inverter system

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CN203057015U true CN203057015U (en) 2013-07-10

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105958532A (en) * 2016-05-25 2016-09-21 安徽大学 Commercial power complementation photovoltaic control inversion integrated machine and control strategy of
CN105978386A (en) * 2015-11-26 2016-09-28 浙江昱能科技有限公司 Direct current and alternating current power conversion device and photovoltaic power generation system
CN106451723A (en) * 2016-08-31 2017-02-22 南昌杜迪电子技术有限公司 Grid-connected and off-grid micro inversion apparatus with storage battery charge-discharge function, and operating method for grid-connected and off-grid micro inversion apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105978386A (en) * 2015-11-26 2016-09-28 浙江昱能科技有限公司 Direct current and alternating current power conversion device and photovoltaic power generation system
CN105958532A (en) * 2016-05-25 2016-09-21 安徽大学 Commercial power complementation photovoltaic control inversion integrated machine and control strategy of
CN106451723A (en) * 2016-08-31 2017-02-22 南昌杜迪电子技术有限公司 Grid-connected and off-grid micro inversion apparatus with storage battery charge-discharge function, and operating method for grid-connected and off-grid micro inversion apparatus

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CP01 Change in the name or title of a patent holder

Address after: 215000 Suzhou high tech Industrial Development Zone, Jiangsu Province, Lu Lu, No. 199, No.

Co-patentee after: CANADIAN SOLAR MANUFACTURING (CHANGSHU) Inc.

Patentee after: CSI SOLAR POWER GROUP Co.,Ltd.

Address before: 215000 Suzhou high tech Industrial Development Zone, Jiangsu Province, Lu Lu, No. 199, No.

Co-patentee before: CANADIAN SOLAR MANUFACTURING (CHANGSHU) Inc.

Patentee before: CSI SOLAR POWER (CHINA) Inc.

CP01 Change in the name or title of a patent holder
CP03 Change of name, title or address

Address after: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province

Patentee after: Atlas sunshine Power Group Co.,Ltd.

Patentee after: CANADIAN SOLAR MANUFACTURING (CHANGSHU) Inc.

Address before: 215000 No. 199 Lu Shan Road, Suzhou hi tech Industrial Development Zone, Suzhou, Jiangsu

Patentee before: CSI SOLAR POWER GROUP Co.,Ltd.

Patentee before: CANADIAN SOLAR MANUFACTURING (CHANGSHU) Inc.

CP03 Change of name, title or address
CX01 Expiry of patent term

Granted publication date: 20130710

CX01 Expiry of patent term