CN205356181U - A dc -to -ac converter for photovoltaic power generation system and electric energy repayment - Google Patents
A dc -to -ac converter for photovoltaic power generation system and electric energy repayment Download PDFInfo
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- CN205356181U CN205356181U CN201620148794.0U CN201620148794U CN205356181U CN 205356181 U CN205356181 U CN 205356181U CN 201620148794 U CN201620148794 U CN 201620148794U CN 205356181 U CN205356181 U CN 205356181U
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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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Abstract
The utility model relates to a dc -to -ac converter of photovoltaic power generation and electric energy repayment, including DSP control circuit, the voltage stabilizing circuit that steps up, DC -AC drive circuit, inverter circuit and contravariant mode switching circuit, DSP control circuit's signal output part respectively with voltage stabilizing circuit's the signal input part of stepping up connects DC -AC drive circuit's signal input part connect and contravariant mode switching circuit's input is connected, step up voltage stabilizing circuit output with inverter circuit's input connection, inverter circuit's control end with DC -AC drive circuit's output connection, inverter circuit's output with contravariant mode switching circuit's input connection, voltage stabilizing circuit's the input of stepping up is used for connecting the power device that can provide the electric energy as the input of dc -to -ac converter, contravariant mode switching circuit's output is used for connecting respectively electric wire netting and/or load as the output of dc -to -ac converter. The utility model discloses a grid -connected PV, the produced electric energy of power device aging process resume load to electric wire netting or load.
Description
Technical field
This utility model relates to a kind of inverter, particularly relates to a kind of can be used for electric energy feedback that photovoltaic generating system and can providing produces in the ageing processes such as the various power supplys of electric energy, the battery inverter to electrical network or all the other loads.
Background technology
Photovoltaic generating system is a kind of photovoltaic effect utilizing solar cell semi-conducting material, and solar radiation can be converted directly into a kind of new power generating system of electric energy, is called for short photovoltaic.Photovoltaic generating system is mainly made up of solar battery group, accumulator battery, charging-discharging controller, inverter and AC power distribution cabinet/AC distribution panel, inverter in existing photovoltaic generating system is not directly applicable various power supply, the energy recovery of battery constant power device and feedback grid, thus causing produced energy waste in the process of various power supply, battery constant power device, it is unfavorable for energy-conserving and environment-protective.
Utility model content
This utility model is in order to solve problem existing in prior art, there is provided a kind of for the inverter in photovoltaic generating system at this, photovoltaic cell group and various power supply, battery constant power device can be processed by produced electric energy in ageing process by this inverter, again be delivered to electrical network or load, it is achieved thereby that the energy again with.
In order to realize the purpose of this utility model, be the technical scheme is that at this
For the inverter of photovoltaic generating system and electric energy feedback, switch circuit including DSP control circuit, voltage boosting and stabilizing circuit, DC-AC drive circuit, inverter circuit and inverter mode；The signal output part of described DSP control circuit is connected with the signal input part of described voltage boosting and stabilizing circuit respectively, the signal input part of described DC-AC drive circuit connects and the input of described inverter mode switching circuit connects, the output of described voltage boosting and stabilizing circuit is connected with the input of described inverter circuit, the end that controls of described inverter circuit is connected with the control output of described DC-AC drive circuit, and the input that the output of described inverter circuit switches circuit with described inverter mode is connected；The input of described voltage boosting and stabilizing circuit is used for connecting the power device that can provide electric energy as the input of inverter, and the output of described inverter mode switching circuit is used for connecting electrical network and/or load as the outfan of inverter.Input at inverter circuit sets up a voltage boosting and stabilizing circuit, by voltage boosting and stabilizing circuit, the DC voltage of input is boosted, it is thus possible to undertaken boosting to the magnitude of voltage needed for electrical network or load by electric energy produced in the electric energy of photovoltaic and power source aging process, it is achieved thereby that electric energy produced by power device ageing process re-enters to electrical network or load, save the energy.
In certain embodiments, adopted inverter circuit is full bridge inverter, thus inversion can either be realized, in turn simplify circuit structure of the present utility model, owing to adopting full bridge inverter structure, also reduces production cost.
In order to strengthen use scope of the present utility model, to this this utility model to the requirement of input voltage range value it is: DC70-430V.
This utility model may be directly applied in photovoltaic generating system, it is also possible to for by electric energy feedback produced in power device ageing process to electrical network or load.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model；
Fig. 2 is the electrical schematic diagram of the voltage boosting and stabilizing circuit described in this utility model；
Fig. 3 is the circuit theory diagrams of the inverter circuit described in this utility model.
Detailed description of the invention
In order to further illustrate the technical solution of the utility model, in conjunction with accompanying drawing, the technical solution of the utility model is done specific description.
As shown in Figure 1, provided by the utility model is that one for photovoltaic generating system and reclaims power supply, produced electric energy in battery constant power device aging process, and after being processed by electric energy produced in ageing process, again it is fed back to the inverter of electrical network or load, it includes for selecting inverter output is access electrical network or access the DSP control circuit of load, for the voltage boosting and stabilizing circuit being undertaken boosting to line voltage or load required voltage by the voltage of input inverter, for the DSP digital signal exported being driven the DC-AC drive circuit of inverter circuit work, for the inverter circuit of converting direct-current power into alternating-current power and inverter mode are switched circuit.The concrete annexation of above circuit is: the signal output part of described DSP control circuit is connected with the control signal input of described voltage boosting and stabilizing circuit respectively, the signal input part of described DC-AC drive circuit connects and the input of described inverter mode switching circuit connects, the output of described voltage boosting and stabilizing circuit is connected with the input of described inverter circuit, the end that controls of described inverter circuit is connected with the output of described DC-AC drive circuit, and the input that the output of described inverter circuit switches circuit with described inverter mode is connected；The input of described voltage boosting and stabilizing circuit is used for connecting the power device that can provide electric energy as the input of inverter, and the output of described inverter mode switching circuit connects electrical network and/or load respectively as the outfan of inverter.
Operation principle of the present utility model is: select the output voltage of inverter to be directly accessed electrical network by DSP control circuit or being directly accessed load is load supplying, when selecting to be connected to the grid by electric energy, inverter works in grid-connect mode, need the phase place of detection line voltage, the voltage current waveform making output is fully synchronized in electrical network, namely with frequency homophase, the current waveform harmonic distortion (THD) < 5% of output is also controlled.When input is for photovoltaic cell group, in addition it is also necessary to the power of input is done MPPT maximum power point tracking (MPPT) control, when for other power device, it is possible to work in constant current (CC)/constant voltage (CV) pattern according to setting；When selecting output to connect load, inverter works in off-network pattern, does not carry out grid phase and synchronizes to calculate, outputting standard sine wave voltage, output voltage being carried out voltage stabilizing control, the watt level of input is only relevant with bearing power simultaneously, it does not have MPPT maximum power point tracking etc. control.
Voltage boosting and stabilizing circuit described in this utility model can adopt the voltage boosting and stabilizing circuit of existing any type, provides the voltage boosting and stabilizing circuit of a kind of simple in construction at this, and its theory structure is as shown in Figure 2.
Inverter circuit described in this utility model can adopt existing any topological circuit structure, provides a kind of full bridge inverter being made up of audion at this, such as the full bridge inverter being made up of IGBT, as shown in Figure 3.
Additionally, the inverter mode switching circuit described in this utility model can adopt existing any a circuit with single-input double-output function, it would however also be possible to employ independent components and parts realize, such as double-contact relay.
In addition, in the course of processing, the DSP control circuit of record, voltage boosting and stabilizing circuit, DC-AC drive circuit, inverter circuit and inverter mode can being switched the circuit board that circuit production becomes independent, corresponding is DSP master control borad, boosting voltage stabilization plate, DC/AC inversion driving plate and inverter mode switching.Being fabricated to independent circuit board can make the placement-and-routing of circuit more optimize, more simplify, and decreases because on a fast-circuit plate, components and parts cause interfering between cabling too much.
This utility model is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present utility model; no matter but in its shape or structure, do any change; every have same or like with the application like technical scheme, all fall within protection domain of the present utility model.
Claims (3)
1. for the inverter of photovoltaic generating system and electric energy feedback, it is characterised in that: include DSP control circuit, voltage boosting and stabilizing circuit, DC-AC drive circuit, inverter circuit and inverter mode switching circuit；The signal output part of described DSP control circuit is connected with the signal input part of described voltage boosting and stabilizing circuit respectively, the signal input part of described DC-AC drive circuit connects and the input of described inverter mode switching circuit connects, the output of described voltage boosting and stabilizing circuit is connected with the input of described inverter circuit, the end that controls of described inverter circuit is connected with the output of described DC-AC drive circuit, and the input that the output of described inverter circuit switches circuit with described inverter mode is connected；The input of described voltage boosting and stabilizing circuit is used for connecting the power device that can provide electric energy as the input of inverter, and the output of described inverter mode switching circuit is used for connecting respectively electrical network and/or load as the outfan of inverter.
2. the inverter for photovoltaic generating system and electric energy feedback as claimed in claim 1, it is characterised in that: described inverter circuit is full bridge inverter.
3. the inverter for photovoltaic generating system and electric energy feedback as claimed in claim 1 or 2, it is characterised in that: the voltage range of described voltage boosting and stabilizing circuit input input is DC70-430V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620148794.0U CN205356181U (en) | 2016-02-26 | 2016-02-26 | A dc -to -ac converter for photovoltaic power generation system and electric energy repayment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620148794.0U CN205356181U (en) | 2016-02-26 | 2016-02-26 | A dc -to -ac converter for photovoltaic power generation system and electric energy repayment |
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| CN205356181U true CN205356181U (en) | 2016-06-29 |
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| CN201620148794.0U Active CN205356181U (en) | 2016-02-26 | 2016-02-26 | A dc -to -ac converter for photovoltaic power generation system and electric energy repayment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112769207A (en) * | 2020-12-24 | 2021-05-07 | 福建众益太阳能科技股份公司 | Solar street lamp aging test lithium battery capacity electric energy recovery system |
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2016
- 2016-02-26 CN CN201620148794.0U patent/CN205356181U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112769207A (en) * | 2020-12-24 | 2021-05-07 | 福建众益太阳能科技股份公司 | Solar street lamp aging test lithium battery capacity electric energy recovery system |
| CN112769207B (en) * | 2020-12-24 | 2023-09-22 | 福建众益太阳能科技股份公司 | Solar street lamp aging test lithium battery capacity electric energy recovery system |
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