Notice of Violation of IEEE Publication PrinciplesA cascaded high step-up dc-dc converter for micro-grid

2012 World Congress on Information and Communication Technologies Pub Date : 2012-10-01 DOI:10.1109/WICT.2012.6409109

R. Kameswara Rao, B. Satya, Vara Prasad, K. Naidu, S. Changchien, T. Liang, Jiann-Fuh Chen, Lung-Sheng Yang, Shih-Ming Chen, Jiann-Fuh Chen Power

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引用次数: 6

Abstract

A high-efficiency dc-dc converter with high voltage gain and reduced switch stress is proposed. Generally speaking, the utilization of a coupled inductor is useful for raising the step-up ratio of the conventional boost converter. However, the switch surge voltage may be caused by the leakage inductor so that it will result in the requirement of high-voltage-rated devices. This paper proposes a new high step-up dc-dc converter designed especially for regulating the dc interface between various micro-sources and a dc-ac inverter to electricity grid. The figuration of the proposed converter is a quadratic boost converter with the coupled inductor in the second boost converter. The converter achieves high step-up voltage gain with appropriate duty ratio and low voltage stress on the power switch. Additionally, the energy stored in the leakage inductor of the coupled inductor can be recycled to the output capacitor. The operating principles and steady-state analysis of continuous-conduction mode and boundary-conduction mode are discussed in detail. The simulation circuit is developed by using the MATLAB/SIMULINK modeling and the concerned characteristics are analysed.

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一种微电网级联高升压dc-dc变换器

提出了一种具有高电压增益和低开关应力的高效dc-dc变换器。一般来说，利用耦合电感可以提高传统升压变换器的升压比。然而，开关浪涌电压可能是由漏电电感引起的，从而导致对器件的额定电压要求过高。本文提出了一种新型的高升压dc-dc变换器，专门用于调节各种微源之间的直流接口和直流-交流逆变器并网。所提出的变换器的结构是二次升压变换器，在第二升压变换器中有耦合电感。该变换器以适当的占空比实现了高升压增益和对电源开关的低电压应力。此外，存储在耦合电感的泄漏电感中的能量可以再循环到输出电容中。详细讨论了连续导通模式和边界导通模式的工作原理和稳态分析。利用MATLAB/SIMULINK建模开发了仿真电路，并对相关特性进行了分析。

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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2012 World Congress on Information and Communication Technologies

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