基于有限时间观测器的PFC变换器自适应超螺旋滑模控制

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关键词：功率因数校正电路；滑模控制；扰动观测器；抖振抑制；自适应增益DOI：10.15938/j. emc.2025.09.011中图分类号：TM46 文献标志码：A 文章编号：1007-449X（2025）09-0116-11

Abstract：To address the slow dynamic response and insufficient disturbance rejection of conventional control methods for single-phase three-level power factor correction circuits，an adaptive super-twisting sliding mode control strategy was proposed based on a finite-time disturbance observer.By introducing equivalent adaptive gain to enhance the super-twisting algorithm and applying it to voltage regulation and power tracking loops，this strategy effectively improves dynamic performance while suppressing chattering. Simultaneously，a linear-enhanced super-twisting observer was designed for real-time compensation of system disturbances， reducing gain requirements and enhancing convergence speed and disturbance rejection.Experimental validation on a single-phase back-to-back three-level converter with cascade cell demonstrates that，compared to traditional PI control， this strategy achieves 44.5% and 56.4% shorter response times with 48.1% and 80.5% reduced voltage fluctuations during load transients ; under reference voltage steps，voltage rise recovery time is shortened by 88.1% without significant overshoot， fall recovery time by 34.4% ，and voltage dip magnitude by 58.9% ； during input voltage fluctuations，transient duration decreases by 37.6% with 61.7% reduction in voltage sag magnitude. Results confirm that this method significantly enhances system response speed and robustness，providing an effective control solution for high-reliability power factor correction.

Keywords： power factor correction circuit； sliding mode control； disturbance observer; chattering sup-pression；adaptive gain

0引言

在现代电力电子系统中，整流器的设计不仅要满足基本的电能转换需求，还需要符合IEEE519、IEC 61000-3－2等谐波标准的要求[1]。（剩余14414字）