Modeling and dynamic feedback linearization of a 5-switch tri-state buck-boost bidirectional DC-DC converter

2021 22nd IEEE International Conference on Industrial Technology (ICIT) Pub Date : 2021-03-10 DOI:10.1109/ICIT46573.2021.9453569

Gabriel R. Broday, G. Damm, W. Pasillas-Lépine, L. Lopes

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引用次数: 2

Abstract

Energy storage devices are frequently employed for dynamic voltage regulation in DC nano and microgrids. For that, the power electronic interface should allow fast and accurate control of the bidirectional power flow. This requires an appropriate set of power electronics topology and control strategy. This paper focuses on a novel 5-switch DC-DC converter capable of reversing the power flow direction without changing the current direction in the intermediate inductor. A tri-state buck-boost plus free-wheeling modulation scheme is discussed. One issue with conventional PI-type controllers designed for converter models linearized around a typical operating point is their performance deteriorates as the operating point changes. In such cases, advanced control methods based on non-linear control theory can be beneficial. This paper discusses an approach for the modelling and control by dynamic feedback linearization of a 5-switch bidirectional DC-DC converter. The performance is verified by means of simulation results.

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五开关三态buck-boost双向DC-DC变换器的建模和动态反馈线性化

在直流纳米电网和微电网中，储能装置经常用于动态电压调节。为此，电力电子接口应该允许快速和准确地控制双向功率流。这需要一套适当的电力电子拓扑和控制策略。本文重点研究了一种新型的5开关DC-DC变换器，该变换器能够在不改变中间电感电流方向的情况下逆转功率流向。讨论了一种三态buck-boost加自由旋转调制方案。传统pi型控制器设计用于围绕典型工作点线性化的变换器模型的一个问题是，它们的性能随着工作点的变化而恶化。在这种情况下，基于非线性控制理论的先进控制方法是有益的。本文讨论了一种5开关双向DC-DC变换器的动态反馈线性化建模和控制方法。仿真结果验证了该方法的性能。

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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2021 22nd IEEE International Conference on Industrial Technology (ICIT)

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