Fuzzy controller based on input current slope for a three-stage cascaded boost converter

IF 1.6 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Electrical Engineering Pub Date : 2024-08-31 DOI:10.1007/s00202-024-02661-9

Sathit Chimplee, Sudarat Khwan-on

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Abstract

A novel fuzzy controller based on an input current slope for a three-stage cascaded boost converter is presented for high-voltage DC applications. The control objective is to achieve satisfactory converter performance, facing not only variations in load resistance and renewable energy source voltage but also in the interaction of the individual converter in each stage. The intricate configuration nature of multi-stage cascaded boost converter renders the mathematical model complex, which is perplexing for the design methodology of controllers. In response to these challenging problems, the fuzzy controller can function without a precise mathematical model. It uses an understanding of the converter behavior to develop control rules that imitate human decision making. In addition to controlling the output voltage, the proposed fuzzy controller in this paper can manage the input current along with the reference current slope without overshooting or taking a long time to settle. The input current slope and the output voltage error are determined with suitable membership functions and their intervals. The fuzzy output is a change in duty, linguistically associated with the system inputs through 15 fuzzy rules. The simulations and experimental results indicate that the output voltage of 400 V is finely regulated with robustness. In addition, the results imply that performance performs effectively in both transient and steady states, even when the converter functions under conditions of fluctuating load resistance, input voltage, and desired output voltage.

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基于输入电流斜率的三级级联升压转换器模糊控制器

本文介绍了一种基于输入电流斜率的新型模糊控制器，适用于高压直流应用中的三级级联升压转换器。控制目标是使转换器达到令人满意的性能，不仅要面对负载电阻和可再生能源电压的变化，还要面对每级转换器之间的相互作用。多级级联升压转换器错综复杂的配置特性使其数学模型变得复杂，这给控制器的设计方法带来了困惑。针对这些难题，模糊控制器可以在没有精确数学模型的情况下发挥作用。它利用对转换器行为的理解，制定出模仿人类决策的控制规则。除了控制输出电压，本文提出的模糊控制器还能管理输入电流和参考电流斜率，而不会出现过冲或需要很长时间才能稳定下来。输入电流斜率和输出电压误差由合适的成员函数及其区间决定。模糊输出是占空比的变化，通过 15 条模糊规则与系统输入进行语言关联。模拟和实验结果表明，400 V 的输出电压得到了稳健的精细调节。此外，结果还表明，即使转换器在负载电阻、输入电压和所需输出电压波动的条件下工作，它在瞬态和稳态下都能有效地发挥性能。

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

Electrical Engineering 工程技术-工程：电子与电气

CiteScore

3.60

自引率

16.70%

发文量

审稿时长

>12 weeks

期刊介绍： The journal “Electrical Engineering” following the long tradition of Archiv für Elektrotechnik publishes original papers of archival value in electrical engineering with a strong focus on electric power systems, smart grid approaches to power transmission and distribution, power system planning, operation and control, electricity markets, renewable power generation, microgrids, power electronics, electrical machines and drives, electric vehicles, railway electrification systems and electric transportation infrastructures, energy storage in electric power systems and vehicles, high voltage engineering, electromagnetic transients in power networks, lightning protection, electrical safety, electrical insulation systems, apparatus, devices, and components. Manuscripts describing theoretical, computer application and experimental research results are welcomed. Electrical Engineering - Archiv für Elektrotechnik is published in agreement with Verband der Elektrotechnik Elektronik Informationstechnik eV (VDE).