基于陷波滤波器的并网逆变器多速率复合重复控制器的设计

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关键词：并网逆变器；多速率复合重复控制；有源阻尼；陷波滤波器；谐波抑制中图分类号：TM743 文献标志码：A 文章编号：1003-5168（2025）20-0004-07DOI：10.19968/j.cnki.hnkj.1003-5168.2025.20.001

Design of a Multirate Compound Repetitive Controller for GridConnectedInvertersBased ona Notch Filter

LIANG Fen'LIANG Xiao'ZHANG Xinying1LI Zhenfeng² （1.School of Mechanical and Electrical Engineering，Henan Industry and Trade Vocational College， Zhengzhou 451191， China;2.Zhengzhou Yutong Bus Co.，Ltd.，New Energy Vehicle Division， Zhengzhou ， China）

Abstract：[Purposes] To address the resonance peak issue at the resonant frequency of LCL gridconected inverters and to reduce the computational load and memory consumption of the system，while minimizing the losses caused by passive damping.[Methods] This paper adopts an active damping strategy based on a notch filter and proposes a novel design scheme for a multirate composite repetitive controllr.Detailed parameter design for the controler is also provided.[Findings] Simulation results demonstrate that the proposed multirate repetitive controller based on a notch filter maintains high gain at the fundamental frequency while rapidly attenuating gain at high frequencies.As the harmonic content of the inverter system is predominantly composed of low-frequency harmonics，the controller exhibits excellnt

harmonic suppression performance in the low-frequency range.Additionally，its low gain at high frequencies enhances system stability.[Conclusions] Compared to traditional single-rate repetitive controllers， the proposed controller employs a low-loss notch filter for damping，thus retaining the superior harmonic suppression capability of conventional controllers.Moreover，the reduced controller sampling rate in the multirate system improves stability while reducing computational load and memory consumption. Keywords： grid-connected inverter; multirate compound repetitive controller; active damping; notch filter; harmonic suppression

0 引言

在当前全球能源转型背景下，可再生能源发电技术已经成为解决能源短缺与环境保护之间矛盾的关键途径。（剩余7075字）