增强型傅氏算法在监视线保护中的应用

Application of improved Fourier algorithm in the cable monitor wire protection

分析了现有监视线保护存在的问题,即在干扰信号的作用下,容易产生误动和拒动.提出了一种终端加电阻的改进型全波傅氏算法的交流监视线保护原理,该方法能完全滤除直流衰减信号及直流、工频和高频杂散电流.通过装置实验证明,该方法可靠准确,计算量小,是一种可行的监视线保护.

The existing problems of the protection of cable monitor wire were analyzed,which were under the disturbance effection the protection would fail to operate or unwanted operate.Then the protection principle of an AC monitor wire with the terminal connected to a resistance which used improved Fourier algorithm was studied.In this way the decaying DC component,DC,power frequency and high order stray currents were all completely filtered.The experimental results show that this method is reliable,viable and accu...