A model predictive control based MPPT technique for novel DC-DC converter and voltage regulation in DC microgrid

IF 2.6 4区 工程技术 Q3 ENERGY & FUELS Frontiers in Energy Research Pub Date : 2024-08-29 DOI:10.3389/fenrg.2024.1471499
Kunte Abhijit Bhagwan, Udaya Bhasker Manthati, Faisal Alsaif
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Abstract

This work presents a system design for extracting maximum power using the modified maximum power point tracking (MPPT) technique and a novel high-gain DC-DC converter, which was then used to supply a microgrid system with a conventional buck converter. We present a novel structure comprising the MPPT, voltage boosting, and voltage regulating components for a DC microgrid in a single system. The most important features of a photovoltaic (PV) system include a high-gain converter and maximum PV power extraction; considering these, we present a high-gain DC-DC converter that boosts the output voltage to ten times the input voltage. Furthermore, the MPPT technique extracts maximum power from the PV panel based on model predictive control through its better transient response than the conventional incremental conductance method. The MPPT approach was tested with both fixed- and variable-step operations, and the results were compared for load variations. Considering the economics of the system, the proposed approach attempts cost reduction by optimizing the number of sensors to two instead of three. Simulations were conducted under different environmental conditions using MATLAB-Simulink, and the performance differences between the conventional incremental conductance and proposed MPPT-based methods are shown. Next, DC voltage regulation was implemented for the proposed PV and existing systems by considering different load and irradiation conditions while maintaining constant temperature. The simulation results showed the latter system had better performance than the former under different environmental conditions, with persistent results for voltage regulation at different load and irradiation conditions.
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基于模型预测控制的 MPPT 技术,用于直流微电网中的新型直流-直流转换器和电压调节
本研究介绍了一种利用改进型最大功率点跟踪(MPPT)技术和新型高增益直流-直流转换器提取最大功率的系统设计,该系统随后被用于为使用传统降压转换器的微电网系统供电。我们提出了一种新颖的结构,在单个系统中包含直流微电网的 MPPT、升压和稳压组件。光伏(PV)系统最重要的特点包括高增益转换器和最大光伏功率提取;考虑到这些特点,我们提出了一种高增益 DC-DC 转换器,可将输出电压提升至输入电压的十倍。此外,与传统的增量电导法相比,基于模型预测控制的 MPPT 技术通过更好的瞬态响应从光伏板中提取最大功率。MPPT 方法通过固定和可变步长操作进行了测试,并对负载变化的结果进行了比较。考虑到系统的经济性,所提出的方法试图通过优化传感器数量,将其从三个减少到两个,从而降低成本。使用 MATLAB-Simulink 在不同环境条件下进行了仿真,并显示了传统增量电导和基于 MPPT 的拟议方法之间的性能差异。接下来,通过考虑不同的负载和辐照条件,在保持恒温的情况下,对拟议的光伏系统和现有系统实施了直流电压调节。仿真结果表明,在不同环境条件下,后一种系统的性能优于前一种系统,在不同负载和辐照条件下的电压调节结果持续不变。
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来源期刊
Frontiers in Energy Research
Frontiers in Energy Research Economics, Econometrics and Finance-Economics and Econometrics
CiteScore
3.90
自引率
11.80%
发文量
1727
审稿时长
12 weeks
期刊介绍: Frontiers in Energy Research makes use of the unique Frontiers platform for open-access publishing and research networking for scientists, which provides an equal opportunity to seek, share and create knowledge. The mission of Frontiers is to place publishing back in the hands of working scientists and to promote an interactive, fair, and efficient review process. Articles are peer-reviewed according to the Frontiers review guidelines, which evaluate manuscripts on objective editorial criteria
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