Abstract With ever-increasing power quality problems in power systems, which are mainly attributable to the proliferation of nonlinear power electronics-based loads and also the high penetration of renewable energy sources in the utility grid, more advanced phase-locked loops (PLLs) for the synchronization of power converters and/or extraction of fundamental parameters of the grid voltage are needed. To this end, using a finite-impulse-response filter, which includes an arbitrary number of filter modules, is proposed in this paper. The design procedure for the proposed filter is explained in detail, and its effectiveness is investigated by applying it to a well-known single-phase PLL, the enhanced PLL (EPLL), and performing some comparative simulation and experimental tests. The obtained results demonstrate that the proposed filter can significantly enhance the filtering capability of the EPLL while preserving a fast dynamic behavior.

中文翻译：

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不利电网条件下单相 PLL 的性能改进：基于 FIR 滤波的方法

摘要 随着电力系统中电能质量问题的日益严重，主要归因于非线性电力电子负载的扩散以及可再生能源在公用电网中的高渗透，更先进的锁相环（PLL）用于需要同步功率转换器和/或提取电网电压的基本参数。为此，本文提出了使用包含任意数量滤波器模块的有限脉冲响应滤波器。详细解释了所提出滤波器的设计过程，并通过将其应用于众所周知的单相 PLL、增强型 PLL (EPLL) 并进行一些比较模拟和实验测试来研究其有效性。