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Design of an efficient bipolar converter with fast MPPT algorithm for DC nanogrid application
International Journal of Circuit Theory and Applications ( IF 1.581 ) Pub Date : 2021-05-03 , DOI: 10.1002/cta.3020
Niteesha Kumari, S. Shiva Kumar, V. Laxmi

A single‐input bipolar converter has been proposed along with a fast MPPT tracking algorithm. The proposed converter is used as an interface for PV panel to perform twofold task of effectively extracting the maximum power from the PV side and efficiently delivering the extracted power to the load. For effectively tracking the MPP (maximum power point) of PV panel, a modified perturb and observe (MP&O) algorithm has been proposed in the paper. Proposed algorithm works effectively even under fast variations of irradiation and ambient temperature. The proposed converter has been developed with a target application in DC nanogrid by providing two loading points with amplitude balanced bipolar outputs. Moreover, least input current ripple (compared with other conventional DC‐DC converters) aids the MPP algorithm in improving the tracking efficacy. As the proposed converter has synchronous switching operation at both output terminals referred to input side, the power conversion efficiency of the converter is very high. Two out of three switches used are ground referenced; thus, design complexity of the converter is greatly reduced. Proposed converter with the MP&O algorithm has been analyzed, and the simulation results are obtained using MATLAB/Simulink. A laboratory developed prototype is used to experimentally validate the proposed converter.

中文翻译:

具有快速MPPT算法的高效双极性转换器在直流纳米电网中的应用设计

已经提出了单输入双极性转换器以及快速MPPT跟踪算法。提出的转换器用作PV面板的接口,以执行双重任务,有效地从PV侧提取最大功率,并将提取的功率有效地传递到负载。为了有效跟踪光伏面板的MPP(最大功率点),本文提出了一种改进的扰动观察法(MP&O)。所提出的算法即使在辐射和环境温度快速变化的情况下也能有效地工作。通过提供两个具有振幅平衡双极性输出的负载点,已提出的转换器已针对直流纳米电网中的目标应用进行了开发。此外,最小的输入电流纹波(与其他传统的DC-DC转换器相比)有助于MPP算法提高跟踪效率。由于所提出的转换器在被称为输入侧的两个输出端子处具有同步开关操作,所以转换器的功率转换效率非常高。使用的三分之二的开关均以地为参考;因此,大大降低了转换器的设计复杂度。对采用MP&O算法的拟议转换器进行了分析,并使用MATLAB / Simulink获得了仿真结果。实验室开发的原型用于通过实验验证所提出的转换器。分析了O算法,并使用MATLAB / Simulink获得了仿真结果。实验室开发的原型用于通过实验验证所提出的转换器。分析了O算法,并使用MATLAB / Simulink获得了仿真结果。实验室开发的原型用于通过实验验证所提出的转换器。
更新日期:2021-05-04
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