Topological structure for solar photovoltaic inverter

Abstract

The present invention discloses a topological structure of a inverter, which comprises a solar panel, a high-frequency transformation circuit, and a DC-AC inversion circuit. The input end of the DC-AC inversion circuit is directly connected with the two ends of the solar panel; the original side of the high-frequency transformation circuit is connected with the output end of the DC-AC inversion circuit, and the auxiliary side is connected with the input end of a bridge type rectification circuit; and the output end of the bridge type rectification circuit is also connected with a power frequency switching circuit. The topological structure of the inverter lowers the loss in the inversion, reduces the wiring space, improves the transforming conversion efficiency, decreases the cost and reduces the electromagnetic interference.

Description

technical field [0001] The invention relates to photovoltaic power generation inverter technology, in particular to a topological structure of a solar photovoltaic inverter. Background technique [0002] As the world's energy shortage and environmental pollution become more and more serious, energy and the environment have become major basic issues facing mankind in the 21st century. The development and application of clean and renewable energy has attracted more and more attention from countries all over the world. In the past 20 to 30 years, solar photovoltaic (Photovoltaic, PV) power generation technology has been continuously developed, and photovoltaic grid-connected power generation has become one of the main ways to utilize solar energy. Carrying out research on grid-connected inverter systems for solar photovoltaic power generation has great theoretical and practical significance for alleviating energy and environmental problems, researching high-performance distribu...

AI Technical Summary

Problems solved by technology

[0005] Due to the high voltage on the DC BUS, there must be a certain isolation space on the wiring of the circuit, which is not conducive to the overall wiring;

[0006] Two-stage voltage conversion is required, resulting in low conversion efficiency;

[0007] Due to the boost effect, high-voltage devices must be selected for components such as MOS tubes and capacitors, and the cost is relatively high;

[0008] Both DC-DC boost and DC-AC inverter circuits are high-frequency modulation circuits, and the electromagnetic interference is relatively large

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