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An improved phase difference algorithm based on Fourier transform for quazi-synchronous device
Author(s): 
Pages: 37-39,50
Year: Issue:  20
Journal: RELAY

Keyword:  准同期相位差傅立叶变换;
Abstract: 在微机自动准同期装置中,相位差的测量是同期判断的其在谐波等干扰条件下误差较大.相位差的傅立叶算法具有抗谐波干扰能力,但在同期点两侧频差较大时,存在计算误差.对不同步采样条件下交流信号的傅氏变换结果进行分析,对相位差的傅氏算法进行了改进,并进行仿真、实验,证明可以提高测量精度.目前该算法已经应用在具有同期功能的变电站测控装置中,获得了满意的效果.
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