Also analysis the frequency respond and filter characteristic of Fourier arithmetic based on the uncertainty of the sample result of sine signal. And meanwhile analysis the influence of the fault on the protection relay and Fourier arithmetic.

• 同时,根据正弦信号采样结果的不确定性现象,分析了离散形式的傅氏算法的幅值频率响应以及其滤波特性,并由此分析了直流系统发生换相失败故障以及系统恢复过程中的暂态过程对交流侧系统的继电保护以及傅氏算法的影响。