一种消除非周期分量的新方法

A New Approach to Eliminate Non-Period Component

针对消除故障信号中不确定衰减非周期分量难的问题,提出一种基于实际输入信号消除衰减非周期分量的新方法。该方法只需在整周期数据窗的基础上增加一个采样点来完全求出实际输入信号,达到在未知衰减时间常数的情况下通过求出实际的输入信号而得到衰减非周期分量,从而在进行全波傅里叶算法或其他算法之前消除衰减的非周期分量。理论分析和仿真实验都表明该方法原理是正确的,具有计算简单、精度高的优点,适合于各种保护算法,具有很好的实际应用价值。

In order to eliminate the decaying non-period component, a new approach based on the fact input signals is presented. The new approach only needs to add one sample on the basis of one cycle＇s data window to obtain the fact input signals, which can gain the decaying non-period component without knowing the decaying time constant and eliminate the decaying non-period component before whole-wave Fourier algorithm or other algorithm. The theory analyzing and simulating result show that the new algorithms are correct in principal, it is simple and accurate, and is suitable for using as different algorithm. All of the above shows that the new approach is of value in practice.