Quazi Z-Source Single Stage High Step-Up DC-DC Converter for Grid-connected PV Application

2019 IEEE International Conference on Environment and Electrical Engineering and 2019 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe) Pub Date : 2019-06-10 DOI:10.1109/EEEIC.2019.8783239

Sanjeevikumar Padmanaban, P. K. Maroti, J. Holm‐Nielsen, F. Blaabjerg, Zbigniew Leonowicz, V. Yaramasu

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引用次数: 3

Abstract

In this paper, a single stage Quazi Z-Source (qZS) with active switched inductor based high gain DC-DC converter is proposed for grid-connected photovoltaic system. The active switched inductor structure contributes the additional gain factor in the existed qZS DC-DC converter. Whereas, the proposed converter possessing continuous input current and achieve the high voltage gain at lower duty ratio in a single stage. The operating principle of proposed single stage converter in shoot through and non-shoot through state with respect to characteristics waveform depicted in this article. The detail mathematical analysis with consideration of non-idealities and designing equations of active (L and C) components are derived based on the theoretical hypotheses. The proposed converter simulated in Matlab simulation software and results are validating the functionality of theoretical predictions.

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并网光伏应用的z源单级高升压DC-DC变换器

提出了一种基于有源开关电感的单级准z源高增益DC-DC变换器，用于并网光伏系统。有源开关电感结构为现有的qZS DC-DC变换器提供了额外的增益因子。而该变换器具有连续输入电流，并能在单级较低占空比下实现高电压增益。所提出的单级变换器在贯通和不贯通状态下的工作原理与本文所描述的特性波形的关系。在理论假设的基础上，推导了考虑非理想性的有源元件(L和C)的详细数学分析和设计方程。所提出的变换器在Matlab仿真软件中进行了仿真，结果验证了理论预测的功能性。

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2019 IEEE International Conference on Environment and Electrical Engineering and 2019 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe)

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