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基于全通滤波器的锁相环系统:线性建模、分析与比较评估

All-Pass-Filter-Based PLL Systems: Linear Modeling, Analysis, and Comparative Evaluation

语言:

中文摘要

全通滤波器(APF)在不改变信号幅值的情况下实现相位偏移,是信号处理的关键组件。本文聚焦于基于APF的锁相环(PLL)系统,重点研究其在基频下实现90°相移的机制,通过线性建模与对比评估,分析了该类PLL在电网同步中的性能表现,为电力电子变换器的控制设计提供理论支撑。

English Abstract

All-pass filter (APF) passes all frequency components of a signal without altering their amplitude, but changes their phase. This feature has made the APF a versatile building block in different signal processing applications. The focus of this article is on APF-based phase-locked loops (PLLs), where the APF is required for creating a 90° phase shift at the fundamental frequency. Such a phase shif...
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SunView 深度解读

锁相环(PLL)是阳光电源组串式逆变器、集中式逆变器及PowerTitan储能变流器实现电网同步的核心算法。在弱电网环境下,传统PLL易受谐波和频率波动干扰。本文提出的APF-PLL建模与评估方法,有助于优化公司逆变器在复杂电网条件下的同步稳定性。建议研发团队将其应用于构网型(GFM)与跟网型(GFL)控制策略的改进中,提升产品在弱电网接入时的鲁棒性,从而增强iSolarCloud平台对电网侧动态响应的监测与控制能力。