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An efficient phasor and frequency estimation algorithm for wide frequency range

机译:一种适用于宽频率范围的有效相量和频率估计算法

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摘要

Synchrophasor estimation accuracy can be improved by expanding the dynamic phasor in a Taylor series near the real value of the fundamental frequency. However, this approach requires solving a weighted least square (WLS) problem in each reporting frame. In this paper, a method with reduced complexity is proposed to improve the phasor and frequency estimation under off-nominal conditions such as frequency deviation and power oscillation. It has been shown that, for adequately chosen window function, the estimation accuracy can be noticeably improved simply by shifting the nominal WLS frequency response towards the estimated frequency. In this way, the computational complexity is significantly reduced. Simulation results show that the proposed algorithm outperforms the considered algorithms in a variety of scenarios.
机译:通过在基本频率的实际值附近扩展泰勒级数中的动态相量,可以提高同步相量估计的准确性。但是,此方法需要解决每个报告帧中的加权最小二乘(WLS)问题。本文提出了一种降低复杂度的方法,以改善频率偏离和功率振荡等非标称条件下的相量和频率估计。已经表明,对于适当选择的窗口函数,只需将标称WLS频率响应移向估计频率,即可显着提高估计精度。这样,计算复杂度大大降低了。仿真结果表明,所提出的算法在各种情况下均优于所考虑的算法。

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