Novel high-performance grid-connected photovoltaic inverter

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. ...

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

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