CN103051235A - Photovoltaic module inverter - Google Patents
Photovoltaic module inverter Download PDFInfo
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- CN103051235A CN103051235A CN201210577785XA CN201210577785A CN103051235A CN 103051235 A CN103051235 A CN 103051235A CN 201210577785X A CN201210577785X A CN 201210577785XA CN 201210577785 A CN201210577785 A CN 201210577785A CN 103051235 A CN103051235 A CN 103051235A
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- push
- circuit
- photovoltaic module
- pull type
- power frequency
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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 invention relates to a photovoltaic module inverter which belongs to the technical field of photovoltaic power generation application. The technical scheme is that the photovoltaic module inverter consists of a crystalline silicon battery pack (1), push-pull type direct current (DC)/DC booster circuits (2), a DC/alternating current (AC) power frequency inverting circuit (3), a filter circuit (4) and a microprocessor circuit (5), wherein two push-pull type metal-oxide-semiconductor field effect transistor (MOSFET) switching tubes (2) alternatively operate, a push-pull type MOSFET is driven by high-frequency sinusoidal pulse width modulation (SPWM), and a rectified sinusoidal output voltage is generated on a capacitance which is output by a push-pull type converter. The DC/AC power frequency inverting circuit is switched on/off based on power frequency, converts a rectified output voltage into a sinusoidal voltage and inputs alternating current electric energy into a power grid. The photovoltaic module inverter has the beneficial effects of simplicity in structure, high utilization rate of a transformer core, low conduction loss, high efficiency and the like.
Description
Technical field
The present invention relates to a kind of photovoltaic module inverter, belong to the photovoltaic generation applied technical field.
Background technology
At present, solar energy is one of human available the most direct clean energy resource, also is the basis of future source of energy structure.Inverter is the important step in the grid-connected photovoltaic system; different from centralized inverter; the photovoltaic module inverter is directly installed on the every cell panel, has that the entire system generating efficiency is high, volume is little, easy for installation, reliability is high, be fit to large-scale production, low cost and other advantages.The problem that the photovoltaic module inverter of background technology exists is: complex structure, the magnetic core of transformer utilance is low, conduction loss is large, efficient is low.
Summary of the invention
The object of the invention provides a kind of photovoltaic module inverter, and simple in structure, magnetic core of transformer utilance is high, conduction loss is little, efficient is high, solves the problems referred to above that exist in the background technology.
Technical scheme of the present invention is:
The photovoltaic module inverter, formed by crystal silicon battery assembly, push-pull type DC/DC booster circuit, DC/AC power frequency commutating circuit, filter circuit and microcontroller circuit, the direct voltage of crystal silicon battery assembly is added in push-pull type DC/DC booster circuit, MOSFET drives with the SPMW of high frequency, electric capacity in push-pull converter output produces the sine output voltage of rectification, two MOSFET interleaved operations, DC/AC power frequency commutating circuit carries out switch with power frequency, converts rectifier output voltage to sinusoidal voltage; Filter circuit filtering HF switch harmonic wave, the quality of assurance grid-connected current; Microcontroller circuit makes battery component export in the maximum power mode by to battery component voltage, current sample, and digital phase-locked loop is so that the output current of inverter and synchronized.
Good effect of the present invention: the interleaving technique of photovoltaic module inverter can reduce the input and output current ripples, thereby prolongs the electric capacity life-span and reduce total harmonic distortion, and interleaving technique shares the input and output electric current, thereby reduces transformer copper loss and iron loss; That this invention has is simple in structure, the magnetic core of transformer utilance high, little, the efficient advantages of higher of conduction loss.
Description of drawings
Fig. 1 is photovoltaic module inverter structure block diagram;
Fig. 2 is photovoltaic module inverter electrical schematic diagram;
Among the figure: crystal silicon battery assembly 1, push-pull type DC/DC booster circuit 2, DC/AC power frequency commutating circuit 3, filter circuit 4, microcontroller circuit 5.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described by embodiment.
The photovoltaic module inverter, formed by crystal silicon battery assembly 1, push-pull type DC/DC booster circuit 2, DC/AC power frequency commutating circuit 3, filter circuit 4 and microcontroller circuit 5, the direct voltage of crystal silicon battery assembly is added in push-pull type DC/DC booster circuit, MOSFET drives with the SPMW of high frequency, electric capacity in push-pull converter output produces the sine output voltage of rectification, two MOSFET interleaved operations, DC/AC power frequency commutating circuit carries out switch with power frequency, converts rectifier output voltage to sinusoidal voltage; Filter circuit filtering HF switch harmonic wave, the quality of assurance grid-connected current; Microcontroller circuit makes battery component export in the maximum power mode by to battery component voltage, current sample, and digital phase-locked loop is so that the output current of inverter and synchronized.
Push-pull type DC/DC booster circuit 2 is made of push-pull transformer T1, switch mosfet pipe Q1, switch mosfet pipe Q2, rectifier diode D1, rectifier diode D2, filter capacitor C2; Switch mosfet pipe Q1 and Q2 drive and interleaved operation with the SPMW of high frequency, and the electric capacity of exporting at push-pull converter produces the sine output voltage of rectification; Under generation isolated island and battery component short-circuit conditions, switching tube Q3 and electrical network disconnect fully, guarantee system safety.
DC/AC power frequency commutating circuit 3 is comprised of controllable silicon D3, switch mosfet pipe Q4, controllable silicon D4, switch mosfet pipe Q5, and it will instead swash output voltage and convert sinusoidal voltage to the power frequency switch.
Filter circuit 4 is made of inductance L 1, inductance L 2, capacitor C 3, filter circuit filtering HF switch harmonic wave, the quality of assurance grid-connected current.Microcontroller circuit 5 makes battery component export in the maximum power mode by to battery component voltage, current sample, and digital phase-locked loop is so that the output current of inverter and synchronized.
Claims (2)
1. photovoltaic module inverter, it is characterized in that: by crystal silicon battery assembly (1), push-pull type DC/DC booster circuit (2), DC/AC power frequency commutating circuit (3), filter circuit (4) and microcontroller circuit (5) form, the direct voltage of crystal silicon battery assembly is added in push-pull type DC/DC booster circuit, MOSFET drives with the SPMW of high frequency, electric capacity in push-pull converter output produces the sine output voltage of rectification, two MOSFET interleaved operations, DC/AC power frequency commutating circuit carries out switch with power frequency, converts rectifier output voltage to sinusoidal voltage; Filter circuit filtering HF switch harmonic wave; Microcontroller circuit makes battery component export in the maximum power mode by to battery component voltage, current sample, and digital phase-locked loop is so that the output current of inverter and synchronized.
2. photovoltaic module inverter according to claim 1, it is characterized in that: push-pull type DC/DC booster circuit (2) is made of push-pull transformer T1, switch mosfet pipe Q1, switch mosfet pipe Q2, rectifier diode D1, rectifier diode D2, filter capacitor C2; Switch mosfet pipe Q1 and Q2 drive and interleaved operation with the SPMW of high frequency, and the electric capacity of exporting at push-pull converter produces the sine output voltage of rectification; Under generation isolated island and battery component short-circuit conditions, switching tube Q3 and electrical network disconnect fully.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210577785XA CN103051235A (en) | 2012-12-27 | 2012-12-27 | Photovoltaic module inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210577785XA CN103051235A (en) | 2012-12-27 | 2012-12-27 | Photovoltaic module inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103051235A true CN103051235A (en) | 2013-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210577785XA Pending CN103051235A (en) | 2012-12-27 | 2012-12-27 | Photovoltaic module inverter |
Country Status (1)
| Country | Link |
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| CN (1) | CN103051235A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300895A (en) * | 2014-09-09 | 2015-01-21 | 滨州中捷新能源科技有限公司 | Photovoltaic minitype inverter |
| CN104868492A (en) * | 2014-02-20 | 2015-08-26 | 西门子工厂自动化工程有限公司 | Power control method of grid connected power supply inversion device |
| CN105517650A (en) * | 2014-08-01 | 2016-04-20 | 广州市浦来能源科技有限公司 | Fly-back dc/ac conversion circuit with plurality of windings |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102347706A (en) * | 2010-07-27 | 2012-02-08 | 冯益安 | Photovoltaic or wind-energy signal source type pure sine wave grid-connected inverter |
| CN202385026U (en) * | 2011-12-27 | 2012-08-15 | 保定天威集团有限公司 | Miniature photovoltaic inverter |
-
2012
- 2012-12-27 CN CN201210577785XA patent/CN103051235A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102347706A (en) * | 2010-07-27 | 2012-02-08 | 冯益安 | Photovoltaic or wind-energy signal source type pure sine wave grid-connected inverter |
| CN202385026U (en) * | 2011-12-27 | 2012-08-15 | 保定天威集团有限公司 | Miniature photovoltaic inverter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868492A (en) * | 2014-02-20 | 2015-08-26 | 西门子工厂自动化工程有限公司 | Power control method of grid connected power supply inversion device |
| CN105517650A (en) * | 2014-08-01 | 2016-04-20 | 广州市浦来能源科技有限公司 | Fly-back dc/ac conversion circuit with plurality of windings |
| CN104300895A (en) * | 2014-09-09 | 2015-01-21 | 滨州中捷新能源科技有限公司 | Photovoltaic minitype inverter |
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Application publication date: 20130417 |