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Novel high-performance grid-connected photovoltaic inverter

A photovoltaic inverter, high-performance technology, applied in photovoltaic power generation, climate sustainability, high-efficiency power electronic conversion, etc., can solve the problem of inverter conversion efficiency, intelligent degree of stability and insufficient stability, and insufficient safety protection functions Comprehensive, imperfect structure and technology, etc., to achieve the effect of enhancing safety protection function, enhancing grid adaptability, and improving conversion efficiency

Inactive Publication Date: 2014-03-26
GUANGDONG SANZHU TECHNOLOGY CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

In the existing grid-connected photovoltaic inverter system, the inverter mainly has the following shortcomings: 1. The conversion efficiency, intelligence, and stability of the inverter are not stable enough; 2. The adaptability to the grid is not strong; 3.
[0003] The safety protection function is not comprehensive; 4. The structure and process are not perfect enough, so that the conversion power is not high enough, which needs to be improved

Method used

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0015] Such as Figure 1-Figure 3 As shown, the new high-performance grid-connected photovoltaic inverter of the present invention includes a grid-connected photovoltaic inverter body, and the grid-connected photovoltaic inverter body includes a mechanism frame 1, a console 2, a main board 3 and I / O Interface 4, the main board 3 is provided with a power module 31, a BOOST module 32 and an INVERTER module 33, wherein: the BOOST module 32 includes a BOOST inductor Lr, a first switch tube Q1, a second auxiliary tube assembly Q2, a third switch Tube Q3, and the BUS capacitor, the first switching tube Q1, the third switching tube Q3, and the BUS capacitor assembly are connected in parallel, the second auxiliary tube assembly Q2 is connected in series with the third switching tube Q3, and the second auxiliary tube assembly Q2 includes and The auxiliary ...

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Abstract

The invention relates to a novel high-performance grid-connected photovoltaic inverter. The novel high-performance grid-connected photovoltaic inverter comprises a grid-connected photovoltaic inverter body, the grid-connected photovoltaic inverter body comprises a mechanism frame, a console, a mainboard and an I / O (input / output) interface, and a power module, a BOOST module and an INVERTER module are arranged inside the mainboard. According to the grid-connected photovoltaic inverter system of the novel high-performance grid-connected photovoltaic inverter, the BOOST module utilizes an efficient ZVT-BOOST soft switching adjuster topological structure, zero turn-on loss and zero turn-off loss of a switch tube can be basically achieved, and the highest conversion rate can reach 98.91%; the INVERTER portion utilizes a novel H-type full bridge inverter topological structure, the reliability and the DC EMI effects are good, the conversion efficiency reaches 97.6%, and the conversion power is higher than European level; through the improvement on the BOOST module and the INVERTER module, the conversion efficiency of the whole grid-connected photovoltaic inverter system is remarkably improved, and accordingly the efficiency of the whole grid-connected photovoltaic inverter system can also be greatly improved.

Description

Technical field: [0001] The invention relates to the technical field of grid-connected photovoltaic power generation system equipment, in particular to a novel high-performance grid-connected photovoltaic inverter. Background technique: [0002] The grid-connected photovoltaic inverter system is an inverter system that inverts the direct current generated by solar panels into alternating current with the same amplitude, frequency and phase as the grid voltage. The conversion efficiency of the inverter system is of great significance to the efficiency of the entire grid-connected photovoltaic power generation system, so how to improve the efficiency of the grid-connected photovoltaic inverter system is very critical. In the existing grid-connected photovoltaic inverter system, the inverter mainly has the following shortcomings: 1. The conversion efficiency, intelligence, and stability of the inverter are not stable enough; 2. The adaptability to the grid is not strong; 3. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387H02J3/38
CPCY02B70/1491Y02E10/563Y02B70/10Y02E10/56
Inventor 李伟胜刘军陈洪强陈洪先张荣寿
Owner GUANGDONG SANZHU TECHNOLOGY CO LTD
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