A Structure-Integrated Partially-Isolated Three-Port DC-DC Converter for Renewable Power Systems

2023 IEEE 14th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2023-06-09 DOI:10.1109/PEDG56097.2023.10215084

Xianbin Qi, Yi Wang, Mingzhu Fang, Hong Wang, Yanbo Wang, Zhe Chen

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Abstract

In renewable power systems, a three-port converter is preferable to multiple two-port converters because it offers the advantages of simple structure, high efficiency and low cost. In this paper, a structure-integrated partially-isolated three-port converter is proposed. This converter has compact structure, flexible power transfer path, and the different power transfer modes can be implemented by the developed phase-shifted PWM modulation strategy. Meanwhile, the proposed converter features high voltage gain, exhibits simple parameter design, avoids voltage spikes caused by leakage inductance, and achieves zero-voltage switching (ZVS) of all switches, which makes it more practical and attractive in practical applications. The topology derivation, power transfer modes, operation principle and parameter design are thoroughly analyzed. Finally, a simulation model is built and tested on PSIM 9.1, and the simulation results validate the effectiveness and correctness of the proposed partially-isolated three-port converter.

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可再生能源系统结构集成部分隔离三端口DC-DC变换器

在可再生能源系统中，三端口变换器比多个两端口变换器具有结构简单、效率高、成本低等优点。本文提出了一种结构集成的部分隔离三端口变换器。该变换器结构紧凑，功率传输路径灵活，通过所提出的移相PWM调制策略可以实现不同的功率传输模式。同时，该变换器电压增益高，参数设计简单，避免了漏感引起的电压尖峰，实现了所有开关的零电压开关(ZVS)，在实际应用中更具实用性和吸引力。对其拓扑推导、功率传输方式、工作原理和参数设计进行了深入分析。最后，在PSIM 9.1上建立了仿真模型并进行了测试，仿真结果验证了所提出的部分隔离三端口变换器的有效性和正确性。

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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来源期刊

2023 IEEE 14th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)

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