A step-up/down inverter implemented with the boost-interleaved buck-boost dc-dc converter

2015 IEEE 2nd International Future Energy Electronics Conference (IFEEC) Pub Date : 2015-12-21 DOI:10.1109/IFEEC.2015.7361480

Chien-Hsuan Chang, E. Chang, Chun‐An Cheng, Chaochao Shen

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引用次数: 3

Abstract

A typical photovoltaic (PV) grid-connection power system is consisted of multi-stage converters to perform multiple functions simultaneously. In order to simplify system configuration, reduce cost, and improve conversion efficiency, this paper aims to develop a step-up/down inverter by adopting a boost-interleaved buck-boost (BoIBB) dc-dc converter and connecting with an H-bridge unfolding circuit with line-commutated operation. The proposed circuit can work functionally as either step-down or step-up inverter so that it is suitable for the applications with wide voltage-variation. Due to operating with buck or boost principle, partial energy can be directly delivered to output to improve efficiency. Besides, since only one power switch operates with high-frequency at one time, switching losses can be significantly reduced. Furthermore, high input current is shared by two inductors during step-up mode, leading to the reduction of conduction losses. Finally, a laboratory prototype with 110 Vrms / 60 Hz output voltage is then implemented accordingly to verify the validity and feasibility of the proposed inverter.

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一种用升压交错降压dc-dc变换器实现的升压/降压逆变器

典型的光伏并网电力系统是由多级变流器组成，同时实现多种功能。为了简化系统配置，降低成本，提高转换效率，本文采用升压-交错降压-升压(BoIBB) dc-dc变换器，并与h桥展开电路连接，实现线路换流，设计了一种升压/降压逆变器。该电路既可以作为降压逆变器，也可以作为升压逆变器，适用于电压变化较大的场合。由于采用降压或升压原理工作，可以将部分能量直接输送到输出端，提高效率。此外，由于一次只有一个电源开关以高频工作，可以大大降低开关损耗。此外，在升压模式下，高输入电流由两个电感共享，从而降低了传导损失。最后，设计了输出电压为110 Vrms / 60 Hz的实验室样机，验证了所提逆变器的有效性和可行性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2015 IEEE 2nd International Future Energy Electronics Conference (IFEEC)

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