This paper presents a new numeric technique to estimate the operating power system frequency. The technique employs a recurrent scheme which consists of a tunable input FIR filter, frequency calculator and an averaging output filter. The recurrent structure ensures that power system frequency is efficiently tracked while minimizing signal distortions arising from harmonic and noise effects. The performance of the developed technique has been thoroughly investigated using computer simulations, and the results are provided. The effectiveness of the proposed technique is demonstrated by comparing it with three different methods reported in the literature. An experimental setup is successfully developed to evaluate the practical operation of the estimator corroborating the performance during simulations. It was confirmed that the proposed estimator performs well during static and dynamic conditions which makes it useful for the estimation of online power system frequency.

中文翻译：

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使用循环方案估算电力系统频率

本文提出了一种估计运行电力系统频率的新数值技术。该技术采用循环方案，该方案由可调输入 FIR 滤波器、频率计算器和平均输出滤波器组成。循环结构确保有效跟踪电力系统频率，同时最大限度地减少谐波和噪声影响引起的信号失真。已使用计算机模拟彻底研究了所开发技术的性能，并提供了结果。通过将其与文献中报道的三种不同方法进行比较，证明了所提出技术的有效性。成功开发了一个实验装置来评估估计器的实际操作，证实了模拟过程中的性能。