Interleaved non-isolated switched capacitor network high-gain soft-switching converter and its control method

Abstract

The invention discloses an interleaved non-isolated switched capacitor network high-gain soft switching converter and a control method thereof. The method finds the converter through equivalent circuit analysis on the basis of the hard switching topology of the interleaved non-isolated diode capacitor network high-gain DC converter. In the resonant branch shared by the two boost circuits included in the circuit, by inserting a resonant inductor in the branch and connecting a resonant capacitor in parallel at both ends of the switching tube, the ZVS of the two switching tubes is turned on, and the ZCS of all diodes is turned off. The quasi-resonant soft switching circuit design method of the present invention has certain versatility, is suitable for a type of interleaved non-isolated switched capacitor network high-gain DC converter, and has broad application prospects in new energy distributed power generation systems.

Description

Technical field [0001] The present invention is in the field of new energy distributed generation of photovoltaic, fuel cell, etc., particularly to one for a class of non-isolated boost converter interleaved quasi-resonant circuit design method, and particularly relates to a non-interlaced high-gain switched capacitor network isolating switch Soft converter and its control method. Background technique [0002] Micro-grid technology represents the future development trend of distributed energy supply system, is an important part of intelligent power distribution system of the future, of great significance to promote energy conservation and energy to achieve sustainable development. Photovoltaic and fuel cell technologies due to the wide geographical scope of its application, short construction period, pollution-free and clean energy in new features become the ideal way to household-type new energy power generation in the future. However, the two power characteristic is a significa...

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Problems solved by technology

[0006] The purpose of the present invention is to propose a high-gain interleaved non-isolated switched capacitor network for the inherent defects that the interleaved non-isolated diode capacitor network high-gain DC converter cannot further improve the switching frequency and efficiency, and the power density is limited. Soft-switching converter and control method thereof to achieve high efficiency while increasing system power density

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