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系统并网技术 单相逆变器 并网逆变器 跟网型GFL ★ 5.0

一种谐波畸变下用于单相电网同步的离散时间频率锁定环

A Discrete-Time Frequency-Locked Loop for Single-Phase Grid Synchronization Under Harmonic Distortion

语言:

中文摘要

本文提出了一种离散时间频率锁定环(FLL)方案,用于估计畸变单相参考信号的同相基波分量及其基波角频率。该方案基于单相信号发生器的精确离散模型,能够同时估计出正交的平方相基波分量,有效提升了在谐波干扰环境下的电网同步精度与鲁棒性。

English Abstract

This article presents a discrete-time frequency-locked-loop (FLL) scheme that estimates the in-phase fundamental component of a distorted single-phase reference signal and its fundamental angular frequency. The proposed scheme also estimates the square-phase fundamental component as a set of orthogonal signals. The proposed design is based on an exact discrete model of a single-phase signal genera...
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阳光知情 深度解读

该技术对阳光电源的户用光伏逆变器及小型工商业单相逆变器产品线具有重要价值。在电网环境日益复杂、谐波干扰严重的背景下,该离散时间FLL算法能显著提升逆变器在弱电网或畸变电网下的并网稳定性与电能质量。建议研发团队将其集成至iSolarCloud智能运维平台的底层控制算法中,优化单相产品的锁相环性能,增强产品在复杂电网环境下的适应性,从而提升用户侧光伏系统的发电效率与并网可靠性。