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Partly isolated three-port DC–DC converter based on impedance network
IET Power Electronics ( IF 2 ) Pub Date : 2020-08-25 , DOI: 10.1049/iet-pel.2019.1348
Pezhman Bayat 1 , Alfred Baghramian 1
Affiliation  

This study proposed a novel partly isolated three port converter (PITPC) based on a quasi-Z source converter for photovoltaic applications. Compared with the conventional quasi-Z source converter, the proposed DC–DC converter has dual input sources and uses the switched capacitors and coupled inductor techniques, helping the converter to gain a high voltage. To achieve the power flow control, the proposed converter uses only three power switches with low voltage stress and it is developed for hybridising photovoltaic panels, rechargeable batteries and isolated loads. For this purpose, the proposed PITPC can be easily reconfigured into dual-input single-output, single-input dual-output and single-input single-output modes; so it can even operate when the photovoltaic panel fails to provide energy to the load. Moreover, the study thoroughly discusses various converter operating modes and provides explanations and necessary relationships for circuit operations. The study also explains the control strategy as well as the pulse width modulation waveforms for the proposed converter. Simulation results from MATLAB/Simulink examine the proposed topology performance. The experimental results confirm the advantages claimed for the proposed converter; the results also show a well-distributed efficiency curve and a peak of 96.3%.

中文翻译:

基于阻抗网络的部分隔离三端口DC-DC转换器

这项研究提出了一种基于准Z源转换器的新型部分隔离三端口转换器(PITPC),用于光伏应用。与传统的准Z源转换器相比,建议的DC-DC转换器具有双输入源,并使用开关电容器和耦合电感器技术,从而帮助转换器获得高电压。为了实现功率流控制,拟议的转换器仅使用三个具有低电压应力的功率开关,并且被开发用于混合光伏面板,可充电电池和隔离负载。为此,建议的PITPC可以轻松地重新配置为双输入单输出,单输入双输出和单输入单输出模式。因此它甚至可以在光伏面板无法为负载提供能量时运行。此外,该研究彻底讨论了各种转换器工作模式,并提供了电路工作的解释和必要的关系。这项研究还解释了该转换器的控制策略以及脉宽调制波形。MATLAB / Simulink的仿真结果验证了所提出的拓扑性能。实验结果证实了所提出的转换器的优势。结果还显示效率曲线分布均匀,峰值为96.3%。实验结果证实了所提出的转换器的优势。结果还显示效率曲线分布均匀,峰值为96.3%。实验结果证实了所提出的转换器的优势。结果还显示效率曲线分布均匀,峰值为96.3%。
更新日期:2020-08-28
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