Research on Multi-mode Control Strategy of High-Power Three-port Photovoltaic DC Converter

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI:10.1109/AEERO52475.2021.9708322

Ke Li, Yibo Wang, Junlong Lu, Li-dong Guo, Jiewei Wu, Huan Wang

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Abstract

This paper mainly designs the multi-mode coordinated control strategy of high-power three-port photovoltaic DC converter. In this paper, the operation mode of the converter is divided into independent operation mode and grid-connected operation mode, and the control strategy of different working conditions under the two operation modes is designed respectively, under different working conditions, the photovoltaic port can achieve the maximum power point tracking (MPPT) and the stability control of the intermediate bus voltage. In addition, the topology used in this paper includes LLC converter, and the power transmission efficiency is improved by rationally designing the value of excitation inductor Lm. The simulation and the experimental results both verify the reliability of the multi-mode coordinated control strategy, and the online automatic switching experiment under different operating conditions further verifies the effectiveness of the control strategy.

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大功率三口光伏直流变换器多模控制策略研究

本文主要设计大功率三口光伏直流变换器的多模协调控制策略。本文将变流器的运行模式分为独立运行模式和并网运行模式，并分别设计了两种运行模式下不同工况的控制策略，在不同工况下，光伏端口可以实现最大功率点跟踪(MPPT)和中间母线电压的稳定控制。此外，本文采用的拓扑结构包括LLC变换器，通过合理设计励磁电感Lm的值，提高了功率传输效率。仿真和实验结果均验证了多模式协调控制策略的可靠性，不同工况下的在线自动切换实验进一步验证了控制策略的有效性。

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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2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)

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